function old new delta bc_read_line 305 307 +2 bc_vm_run 701 689 -12 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 1/1 up/down: 2/-12) Total: -10 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
7647 lines
157 KiB
C
7647 lines
157 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* Licensed under GPLv2 or later, see file LICENSE in this source tree.
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* Copyright (c) 2018 Gavin D. Howard and contributors.
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*
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* ** Automatically generated from https://github.com/gavinhoward/bc **
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* ** Do not edit unless you know what you are doing. **
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*/
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//config:config BC
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//config: bool "bc (45 kb; 49 kb when combined with dc)"
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//config: default y
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//config: help
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//config: bc is a command-line, arbitrary-precision calculator with a
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//config: Turing-complete language. See the GNU bc manual
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//config: (https://www.gnu.org/software/bc/manual/bc.html) and bc spec
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//config: (http://pubs.opengroup.org/onlinepubs/9699919799/utilities/bc.html)
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//config: for details.
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//config:
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//config: This bc has four differences to the GNU bc:
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//config:
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//config: 1) The period (.) can also be used as a shortcut for "last", as in
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//config: the BSD bc.
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//config: 2) Arrays are copied before being passed as arguments to
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//config: functions. This behavior is required by the bc spec.
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//config: 3) Arrays can be passed to the builtin "length" function to get
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//config: the number of elements currently in the array. The following
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//config: example prints "1":
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//config:
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//config: a[0] = 0
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//config: length(a[])
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//config:
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//config: 4) The precedence of the boolean "not" operator (!) is equal to
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//config: that of the unary minus (-), or negation, operator. This still
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//config: allows POSIX-compliant scripts to work while somewhat
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//config: preserving expected behavior (versus C) and making parsing
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//config: easier.
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//config:
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//config: Options:
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//config:
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//config: -i --interactive force interactive mode
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//config: -l --mathlib use predefined math routines:
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//config:
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//config: s(expr) = sine of expr in radians
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//config: c(expr) = cosine of expr in radians
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//config: a(expr) = arctangent of expr, returning
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//config: radians
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//config: l(expr) = natural log of expr
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//config: e(expr) = raises e to the power of expr
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//config: j(n, x) = Bessel function of integer order
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//config: n of x
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//config:
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//config: -q --quiet don't print version and copyright.
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//config: -s --standard error if any non-POSIX extensions are used.
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//config: -w --warn warn if any non-POSIX extensions are used.
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//config: -v --version print version and copyright and exit.
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//config:
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//config: Long options are only available if FEATURE_BC_LONG_OPTIONS is
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//config: enabled.
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//config:
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//config:config DC
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//config: bool "dc (38 kb; 49 kb when combined with bc)"
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//config: default y
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//config: help
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//config: dc is a reverse-polish notation command-line calculator which
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//config: supports unlimited precision arithmetic. See the FreeBSD man page
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//config: (https://www.unix.com/man-page/FreeBSD/1/dc/) and GNU dc manual
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//config: (https://www.gnu.org/software/bc/manual/dc-1.05/html_mono/dc.html)
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//config: for details.
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//config:
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//config: This dc has a few differences from the two above:
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//config:
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//config: 1) When printing a byte stream (command "P"), this bc follows what
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//config: the FreeBSD dc does.
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//config: 2) This dc implements the GNU extensions for divmod ("~") and
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//config: modular exponentiation ("|").
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//config: 3) This dc implements all FreeBSD extensions, except for "J" and
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//config: "M".
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//config: 4) Like the FreeBSD dc, this dc supports extended registers.
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//config: However, they are implemented differently. When it encounters
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//config: whitespace where a register should be, it skips the whitespace.
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//config: If the character following is not a lowercase letter, an error
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//config: is issued. Otherwise, the register name is parsed by the
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//config: following regex:
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//config:
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//config: [a-z][a-z0-9_]*
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//config:
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//config: This generally means that register names will be surrounded by
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//config: whitespace.
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//config:
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//config: Examples:
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//config:
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//config: l idx s temp L index S temp2 < do_thing
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//config:
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//config: Also note that, like the FreeBSD dc, extended registers are not
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//config: allowed unless the "-x" option is given.
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//config:
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//config:config FEATURE_DC_SMALL
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//config: bool "Minimal dc implementation (4.2 kb), not using bc code base"
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//config: depends on DC && !BC
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//config: default y
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//config:
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//config:config FEATURE_DC_LIBM
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//config: bool "Enable power and exp functions (requires libm)"
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//config: default y
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//config: depends on FEATURE_DC_SMALL
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//config: help
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//config: Enable power and exp functions.
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//config: NOTE: This will require libm to be present for linking.
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//config:
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//config:config FEATURE_BC_SIGNALS
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//config: bool "Enable bc/dc signal handling"
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//config: default y
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//config: depends on (BC || DC) && !FEATURE_DC_SMALL
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//config: help
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//config: Enable signal handling for bc and dc.
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//config:
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//config:config FEATURE_BC_LONG_OPTIONS
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//config: bool "Enable bc/dc long options"
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//config: default y
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//config: depends on (BC || DC) && !FEATURE_DC_SMALL
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//config: help
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//config: Enable long options for bc and dc.
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//applet:IF_BC(APPLET(bc, BB_DIR_USR_BIN, BB_SUID_DROP))
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//applet:IF_DC(APPLET(dc, BB_DIR_USR_BIN, BB_SUID_DROP))
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//kbuild:lib-$(CONFIG_BC) += bc.o
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//kbuild:lib-$(CONFIG_DC) += bc.o
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//See www.gnu.org/software/bc/manual/bc.html
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//usage:#define bc_trivial_usage
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//usage: "[-sqliw] FILE..."
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//usage:
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//usage:#define bc_full_usage "\n"
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//usage: "\nArbitrary precision calculator"
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//usage: "\n"
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///////: "\n -i Interactive" - has no effect for now
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//usage: "\n -q Quiet"
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//usage: "\n -l Load standard math library"
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//usage: "\n -s Be POSIX compatible"
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//usage: "\n -w Warn if extensions are used"
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///////: "\n -v Version"
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//usage: "\n"
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//usage: "\n$BC_LINE_LENGTH changes output width"
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//usage:
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//usage:#define bc_example_usage
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//usage: "3 + 4.129\n"
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//usage: "1903 - 2893\n"
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//usage: "-129 * 213.28935\n"
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//usage: "12 / -1932\n"
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//usage: "12 % 12\n"
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//usage: "34 ^ 189\n"
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//usage: "scale = 13\n"
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//usage: "ibase = 2\n"
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//usage: "obase = A\n"
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//usage:
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//usage:#define dc_trivial_usage
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//usage: "[-eSCRIPT]... [-fFILE]... [FILE]..."
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//usage:
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//usage:#define dc_full_usage "\n"
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//usage: "\nTiny RPN calculator. Operations:"
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//usage: "\n+, -, *, /, %, ^, exp, ~, divmod, |, "
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//usage: "modular exponentiation,"
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//usage: "\np - print top of the stack (without popping)"
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//usage: "\nf - print entire stack"
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//usage: "\nk - pop the value and set the precision"
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//usage: "\ni - pop the value and set input radix"
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//usage: "\no - pop the value and set output radix"
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//usage: "\nExamples: dc -e'2 2 + p' -> 4, dc -e'8 8 * 2 2 + / p' -> 16"
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//usage:
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//usage:#define dc_example_usage
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//usage: "$ dc -e'2 2 + p'\n"
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//usage: "4\n"
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//usage: "$ dc -e'8 8 \\* 2 2 + / p'\n"
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//usage: "16\n"
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//usage: "$ dc -e'0 1 & p'\n"
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//usage: "0\n"
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//usage: "$ dc -e'0 1 | p'\n"
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//usage: "1\n"
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//usage: "$ echo '72 9 / 8 * p' | dc\n"
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//usage: "64\n"
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#include "libbb.h"
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#include "common_bufsiz.h"
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#if ENABLE_FEATURE_DC_SMALL
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# include "dc.c"
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#else
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typedef enum BcStatus {
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BC_STATUS_SUCCESS = 0,
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BC_STATUS_FAILURE = 1,
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BC_STATUS_PARSE_EMPTY_EXP = 2, // bc_parse_expr() uses this
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BC_STATUS_EOF = 3, // bc_vm_stdin() uses this
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} BcStatus;
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#define BC_VEC_INVALID_IDX ((size_t) -1)
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#define BC_VEC_START_CAP (1 << 5)
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typedef void (*BcVecFree)(void *);
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typedef struct BcVec {
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char *v;
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size_t len;
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size_t cap;
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size_t size;
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BcVecFree dtor;
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} BcVec;
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typedef signed char BcDig;
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typedef struct BcNum {
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BcDig *restrict num;
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size_t rdx;
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size_t len;
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size_t cap;
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bool neg;
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} BcNum;
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#define BC_NUM_MIN_BASE ((unsigned long) 2)
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#define BC_NUM_MAX_IBASE ((unsigned long) 16)
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// larger value might speed up BIGNUM calculations a bit:
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#define BC_NUM_DEF_SIZE (16)
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#define BC_NUM_PRINT_WIDTH (69)
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#define BC_NUM_KARATSUBA_LEN (32)
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typedef BcStatus (*BcNumBinaryOp)(BcNum *, BcNum *, BcNum *, size_t);
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typedef void (*BcNumDigitOp)(size_t, size_t, bool, size_t *, size_t);
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static BcStatus bc_num_add(BcNum *a, BcNum *b, BcNum *c, size_t scale);
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static BcStatus bc_num_sub(BcNum *a, BcNum *b, BcNum *c, size_t scale);
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static BcStatus bc_num_mul(BcNum *a, BcNum *b, BcNum *c, size_t scale);
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static BcStatus bc_num_div(BcNum *a, BcNum *b, BcNum *c, size_t scale);
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static BcStatus bc_num_mod(BcNum *a, BcNum *b, BcNum *c, size_t scale);
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static BcStatus bc_num_pow(BcNum *a, BcNum *b, BcNum *c, size_t scale);
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static BcStatus bc_num_sqrt(BcNum *a, BcNum *b, size_t scale);
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static BcStatus bc_num_divmod(BcNum *a, BcNum *b, BcNum *c, BcNum *d,
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size_t scale);
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typedef enum BcInst {
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#if ENABLE_BC
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BC_INST_INC_PRE,
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BC_INST_DEC_PRE,
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BC_INST_INC_POST,
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BC_INST_DEC_POST,
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#endif
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BC_INST_NEG,
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BC_INST_POWER,
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BC_INST_MULTIPLY,
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BC_INST_DIVIDE,
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BC_INST_MODULUS,
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BC_INST_PLUS,
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BC_INST_MINUS,
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BC_INST_REL_EQ,
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BC_INST_REL_LE,
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BC_INST_REL_GE,
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BC_INST_REL_NE,
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BC_INST_REL_LT,
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BC_INST_REL_GT,
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BC_INST_BOOL_NOT,
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BC_INST_BOOL_OR,
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BC_INST_BOOL_AND,
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#if ENABLE_BC
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BC_INST_ASSIGN_POWER,
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BC_INST_ASSIGN_MULTIPLY,
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BC_INST_ASSIGN_DIVIDE,
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BC_INST_ASSIGN_MODULUS,
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BC_INST_ASSIGN_PLUS,
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BC_INST_ASSIGN_MINUS,
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#endif
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BC_INST_ASSIGN,
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BC_INST_NUM,
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BC_INST_VAR,
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BC_INST_ARRAY_ELEM,
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BC_INST_ARRAY,
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BC_INST_SCALE_FUNC,
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BC_INST_IBASE,
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BC_INST_SCALE,
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BC_INST_LAST,
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BC_INST_LENGTH,
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BC_INST_READ,
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BC_INST_OBASE,
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BC_INST_SQRT,
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BC_INST_PRINT,
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BC_INST_PRINT_POP,
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BC_INST_STR,
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BC_INST_PRINT_STR,
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#if ENABLE_BC
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BC_INST_JUMP,
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BC_INST_JUMP_ZERO,
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BC_INST_CALL,
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BC_INST_RET,
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BC_INST_RET0,
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BC_INST_HALT,
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#endif
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BC_INST_POP,
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BC_INST_POP_EXEC,
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#if ENABLE_DC
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BC_INST_MODEXP,
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BC_INST_DIVMOD,
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BC_INST_EXECUTE,
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BC_INST_EXEC_COND,
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BC_INST_ASCIIFY,
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BC_INST_PRINT_STREAM,
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BC_INST_PRINT_STACK,
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BC_INST_CLEAR_STACK,
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BC_INST_STACK_LEN,
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BC_INST_DUPLICATE,
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BC_INST_SWAP,
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BC_INST_LOAD,
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BC_INST_PUSH_VAR,
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BC_INST_PUSH_TO_VAR,
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BC_INST_QUIT,
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BC_INST_NQUIT,
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BC_INST_INVALID = -1,
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#endif
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} BcInst;
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typedef struct BcId {
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char *name;
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size_t idx;
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} BcId;
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typedef struct BcFunc {
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BcVec code;
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BcVec labels;
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size_t nparams;
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BcVec autos;
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} BcFunc;
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typedef enum BcResultType {
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BC_RESULT_TEMP,
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BC_RESULT_VAR,
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BC_RESULT_ARRAY_ELEM,
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BC_RESULT_ARRAY,
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BC_RESULT_STR,
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BC_RESULT_IBASE,
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BC_RESULT_SCALE,
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BC_RESULT_LAST,
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// These are between to calculate ibase, obase, and last from instructions.
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BC_RESULT_CONSTANT,
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BC_RESULT_ONE,
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BC_RESULT_OBASE,
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} BcResultType;
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typedef union BcResultData {
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BcNum n;
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BcVec v;
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BcId id;
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} BcResultData;
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typedef struct BcResult {
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BcResultType t;
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BcResultData d;
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} BcResult;
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typedef struct BcInstPtr {
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size_t func;
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size_t idx;
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size_t len;
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} BcInstPtr;
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// BC_LEX_NEG is not used in lexing; it is only for parsing.
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typedef enum BcLexType {
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BC_LEX_EOF,
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BC_LEX_INVALID,
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BC_LEX_OP_INC,
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BC_LEX_OP_DEC,
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BC_LEX_NEG,
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BC_LEX_OP_POWER,
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BC_LEX_OP_MULTIPLY,
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BC_LEX_OP_DIVIDE,
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BC_LEX_OP_MODULUS,
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BC_LEX_OP_PLUS,
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BC_LEX_OP_MINUS,
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BC_LEX_OP_REL_EQ,
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BC_LEX_OP_REL_LE,
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BC_LEX_OP_REL_GE,
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BC_LEX_OP_REL_NE,
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BC_LEX_OP_REL_LT,
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BC_LEX_OP_REL_GT,
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BC_LEX_OP_BOOL_NOT,
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BC_LEX_OP_BOOL_OR,
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BC_LEX_OP_BOOL_AND,
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BC_LEX_OP_ASSIGN_POWER,
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BC_LEX_OP_ASSIGN_MULTIPLY,
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BC_LEX_OP_ASSIGN_DIVIDE,
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BC_LEX_OP_ASSIGN_MODULUS,
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BC_LEX_OP_ASSIGN_PLUS,
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BC_LEX_OP_ASSIGN_MINUS,
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BC_LEX_OP_ASSIGN,
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BC_LEX_NLINE,
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BC_LEX_WHITESPACE,
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BC_LEX_LPAREN,
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BC_LEX_RPAREN,
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BC_LEX_LBRACKET,
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BC_LEX_COMMA,
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BC_LEX_RBRACKET,
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BC_LEX_LBRACE,
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BC_LEX_SCOLON,
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BC_LEX_RBRACE,
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BC_LEX_STR,
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BC_LEX_NAME,
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BC_LEX_NUMBER,
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BC_LEX_KEY_1st_keyword,
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BC_LEX_KEY_AUTO = BC_LEX_KEY_1st_keyword,
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BC_LEX_KEY_BREAK,
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BC_LEX_KEY_CONTINUE,
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BC_LEX_KEY_DEFINE,
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BC_LEX_KEY_ELSE,
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BC_LEX_KEY_FOR,
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BC_LEX_KEY_HALT,
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// code uses "type - BC_LEX_KEY_IBASE + BC_INST_IBASE" construct,
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BC_LEX_KEY_IBASE, // relative order should match for: BC_INST_IBASE
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BC_LEX_KEY_IF,
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BC_LEX_KEY_LAST, // relative order should match for: BC_INST_LAST
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BC_LEX_KEY_LENGTH,
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BC_LEX_KEY_LIMITS,
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BC_LEX_KEY_OBASE, // relative order should match for: BC_INST_OBASE
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BC_LEX_KEY_PRINT,
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BC_LEX_KEY_QUIT,
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BC_LEX_KEY_READ,
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BC_LEX_KEY_RETURN,
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BC_LEX_KEY_SCALE,
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BC_LEX_KEY_SQRT,
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BC_LEX_KEY_WHILE,
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#if ENABLE_DC
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BC_LEX_EQ_NO_REG,
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BC_LEX_OP_MODEXP,
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BC_LEX_OP_DIVMOD,
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BC_LEX_COLON,
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BC_LEX_ELSE,
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BC_LEX_EXECUTE,
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BC_LEX_PRINT_STACK,
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BC_LEX_CLEAR_STACK,
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BC_LEX_STACK_LEVEL,
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BC_LEX_DUPLICATE,
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BC_LEX_SWAP,
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BC_LEX_POP,
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BC_LEX_ASCIIFY,
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BC_LEX_PRINT_STREAM,
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BC_LEX_STORE_IBASE,
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BC_LEX_STORE_SCALE,
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BC_LEX_LOAD,
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BC_LEX_LOAD_POP,
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BC_LEX_STORE_PUSH,
|
|
BC_LEX_STORE_OBASE,
|
|
BC_LEX_PRINT_POP,
|
|
BC_LEX_NQUIT,
|
|
BC_LEX_SCALE_FACTOR,
|
|
#endif
|
|
} BcLexType;
|
|
// must match order of BC_LEX_KEY_foo etc above
|
|
#if ENABLE_BC
|
|
struct BcLexKeyword {
|
|
char name8[8];
|
|
};
|
|
#define BC_LEX_KW_ENTRY(a, b) \
|
|
{ .name8 = a /*, .posix = b */ }
|
|
static const struct BcLexKeyword bc_lex_kws[20] = {
|
|
BC_LEX_KW_ENTRY("auto" , 1), // 0
|
|
BC_LEX_KW_ENTRY("break" , 1), // 1
|
|
BC_LEX_KW_ENTRY("continue", 0), // 2 note: this one has no terminating NUL
|
|
BC_LEX_KW_ENTRY("define" , 1), // 3
|
|
|
|
BC_LEX_KW_ENTRY("else" , 0), // 4
|
|
BC_LEX_KW_ENTRY("for" , 1), // 5
|
|
BC_LEX_KW_ENTRY("halt" , 0), // 6
|
|
BC_LEX_KW_ENTRY("ibase" , 1), // 7
|
|
|
|
BC_LEX_KW_ENTRY("if" , 1), // 8
|
|
BC_LEX_KW_ENTRY("last" , 0), // 9
|
|
BC_LEX_KW_ENTRY("length" , 1), // 10
|
|
BC_LEX_KW_ENTRY("limits" , 0), // 11
|
|
|
|
BC_LEX_KW_ENTRY("obase" , 1), // 12
|
|
BC_LEX_KW_ENTRY("print" , 0), // 13
|
|
BC_LEX_KW_ENTRY("quit" , 1), // 14
|
|
BC_LEX_KW_ENTRY("read" , 0), // 15
|
|
|
|
BC_LEX_KW_ENTRY("return" , 1), // 16
|
|
BC_LEX_KW_ENTRY("scale" , 1), // 17
|
|
BC_LEX_KW_ENTRY("sqrt" , 1), // 18
|
|
BC_LEX_KW_ENTRY("while" , 1), // 19
|
|
};
|
|
#undef BC_LEX_KW_ENTRY
|
|
enum {
|
|
POSIX_KWORD_MASK = 0
|
|
| (1 << 0)
|
|
| (1 << 1)
|
|
| (0 << 2)
|
|
| (1 << 3)
|
|
\
|
|
| (0 << 4)
|
|
| (1 << 5)
|
|
| (0 << 6)
|
|
| (1 << 7)
|
|
\
|
|
| (1 << 8)
|
|
| (0 << 9)
|
|
| (1 << 10)
|
|
| (0 << 11)
|
|
\
|
|
| (1 << 12)
|
|
| (0 << 13)
|
|
| (1 << 14)
|
|
| (0 << 15)
|
|
\
|
|
| (1 << 16)
|
|
| (1 << 17)
|
|
| (1 << 18)
|
|
| (1 << 19)
|
|
};
|
|
#define bc_lex_kws_POSIX(i) ((1 << (i)) & POSIX_KWORD_MASK)
|
|
#endif
|
|
|
|
struct BcLex;
|
|
typedef BcStatus (*BcLexNext)(struct BcLex *);
|
|
|
|
typedef struct BcLex {
|
|
|
|
const char *buf;
|
|
size_t i;
|
|
size_t line;
|
|
size_t len;
|
|
bool newline;
|
|
|
|
struct {
|
|
BcLexType t;
|
|
BcLexType last;
|
|
BcVec v;
|
|
} t;
|
|
|
|
BcLexNext next;
|
|
|
|
} BcLex;
|
|
|
|
#define BC_PARSE_STREND ((char) UCHAR_MAX)
|
|
|
|
#define BC_PARSE_REL (1 << 0)
|
|
#define BC_PARSE_PRINT (1 << 1)
|
|
#define BC_PARSE_NOCALL (1 << 2)
|
|
#define BC_PARSE_NOREAD (1 << 3)
|
|
#define BC_PARSE_ARRAY (1 << 4)
|
|
|
|
#define BC_PARSE_TOP_FLAG_PTR(parse) ((uint8_t *) bc_vec_top(&(parse)->flags))
|
|
#define BC_PARSE_TOP_FLAG(parse) (*(BC_PARSE_TOP_FLAG_PTR(parse)))
|
|
|
|
#define BC_PARSE_FLAG_FUNC_INNER (1 << 0)
|
|
#define BC_PARSE_FUNC_INNER(parse) \
|
|
(BC_PARSE_TOP_FLAG(parse) & BC_PARSE_FLAG_FUNC_INNER)
|
|
|
|
#define BC_PARSE_FLAG_FUNC (1 << 1)
|
|
#define BC_PARSE_FUNC(parse) (BC_PARSE_TOP_FLAG(parse) & BC_PARSE_FLAG_FUNC)
|
|
|
|
#define BC_PARSE_FLAG_BODY (1 << 2)
|
|
#define BC_PARSE_BODY(parse) (BC_PARSE_TOP_FLAG(parse) & BC_PARSE_FLAG_BODY)
|
|
|
|
#define BC_PARSE_FLAG_LOOP (1 << 3)
|
|
#define BC_PARSE_LOOP(parse) (BC_PARSE_TOP_FLAG(parse) & BC_PARSE_FLAG_LOOP)
|
|
|
|
#define BC_PARSE_FLAG_LOOP_INNER (1 << 4)
|
|
#define BC_PARSE_LOOP_INNER(parse) \
|
|
(BC_PARSE_TOP_FLAG(parse) & BC_PARSE_FLAG_LOOP_INNER)
|
|
|
|
#define BC_PARSE_FLAG_IF (1 << 5)
|
|
#define BC_PARSE_IF(parse) (BC_PARSE_TOP_FLAG(parse) & BC_PARSE_FLAG_IF)
|
|
|
|
#define BC_PARSE_FLAG_ELSE (1 << 6)
|
|
#define BC_PARSE_ELSE(parse) (BC_PARSE_TOP_FLAG(parse) & BC_PARSE_FLAG_ELSE)
|
|
|
|
#define BC_PARSE_FLAG_IF_END (1 << 7)
|
|
#define BC_PARSE_IF_END(parse) (BC_PARSE_TOP_FLAG(parse) & BC_PARSE_FLAG_IF_END)
|
|
|
|
#define BC_PARSE_CAN_EXEC(parse) \
|
|
(!(BC_PARSE_TOP_FLAG(parse) & \
|
|
(BC_PARSE_FLAG_FUNC_INNER | BC_PARSE_FLAG_FUNC | BC_PARSE_FLAG_BODY | \
|
|
BC_PARSE_FLAG_LOOP | BC_PARSE_FLAG_LOOP_INNER | BC_PARSE_FLAG_IF | \
|
|
BC_PARSE_FLAG_ELSE | BC_PARSE_FLAG_IF_END)))
|
|
|
|
struct BcParse;
|
|
|
|
struct BcProgram;
|
|
|
|
typedef BcStatus (*BcParseParse)(struct BcParse *);
|
|
|
|
typedef struct BcParse {
|
|
|
|
BcParseParse parse;
|
|
|
|
BcLex l;
|
|
|
|
BcVec flags;
|
|
|
|
BcVec exits;
|
|
BcVec conds;
|
|
|
|
BcVec ops;
|
|
|
|
BcFunc *func;
|
|
size_t fidx;
|
|
|
|
size_t nbraces;
|
|
bool auto_part;
|
|
|
|
} BcParse;
|
|
|
|
typedef struct BcProgram {
|
|
|
|
size_t len;
|
|
size_t scale;
|
|
|
|
BcNum ib;
|
|
size_t ib_t;
|
|
BcNum ob;
|
|
size_t ob_t;
|
|
|
|
BcNum hexb;
|
|
|
|
#if ENABLE_DC
|
|
BcNum strmb;
|
|
#endif
|
|
|
|
BcVec results;
|
|
BcVec stack;
|
|
|
|
BcVec fns;
|
|
BcVec fn_map;
|
|
|
|
BcVec vars;
|
|
BcVec var_map;
|
|
|
|
BcVec arrs;
|
|
BcVec arr_map;
|
|
|
|
BcVec strs;
|
|
BcVec consts;
|
|
|
|
const char *file;
|
|
|
|
BcNum last;
|
|
BcNum zero;
|
|
BcNum one;
|
|
|
|
size_t nchars;
|
|
|
|
} BcProgram;
|
|
|
|
#define BC_PROG_STACK(s, n) ((s)->len >= ((size_t) n))
|
|
|
|
#define BC_PROG_MAIN (0)
|
|
#define BC_PROG_READ (1)
|
|
#if ENABLE_DC
|
|
#define BC_PROG_REQ_FUNCS (2)
|
|
#endif
|
|
|
|
#define BC_PROG_STR(n) (!(n)->num && !(n)->cap)
|
|
#define BC_PROG_NUM(r, n) \
|
|
((r)->t != BC_RESULT_ARRAY && (r)->t != BC_RESULT_STR && !BC_PROG_STR(n))
|
|
|
|
typedef unsigned long (*BcProgramBuiltIn)(BcNum *);
|
|
|
|
#define BC_FLAG_W (1 << 0)
|
|
#define BC_FLAG_V (1 << 1)
|
|
#define BC_FLAG_S (1 << 2)
|
|
#define BC_FLAG_Q (1 << 3)
|
|
#define BC_FLAG_L (1 << 4)
|
|
#define BC_FLAG_I (1 << 5)
|
|
#define DC_FLAG_X (1 << 6)
|
|
|
|
#define BC_MAX(a, b) ((a) > (b) ? (a) : (b))
|
|
#define BC_MIN(a, b) ((a) < (b) ? (a) : (b))
|
|
|
|
#define BC_MAX_OBASE ((unsigned) 999)
|
|
#define BC_MAX_DIM ((unsigned) INT_MAX)
|
|
#define BC_MAX_SCALE ((unsigned) UINT_MAX)
|
|
#define BC_MAX_STRING ((unsigned) UINT_MAX - 1)
|
|
#define BC_MAX_NUM BC_MAX_STRING
|
|
// Unused apart from "limits" message. Just show a "biggish number" there.
|
|
//#define BC_MAX_NAME BC_MAX_STRING
|
|
//#define BC_MAX_EXP ((unsigned long) LONG_MAX)
|
|
//#define BC_MAX_VARS ((unsigned long) SIZE_MAX - 1)
|
|
#define BC_MAX_NAME_STR "999999999"
|
|
#define BC_MAX_EXP_STR "999999999"
|
|
#define BC_MAX_VARS_STR "999999999"
|
|
|
|
#define BC_MAX_OBASE_STR "999"
|
|
|
|
#if INT_MAX == 2147483647
|
|
# define BC_MAX_DIM_STR "2147483647"
|
|
#elif INT_MAX == 9223372036854775807
|
|
# define BC_MAX_DIM_STR "9223372036854775807"
|
|
#else
|
|
# error Strange INT_MAX
|
|
#endif
|
|
|
|
#if UINT_MAX == 4294967295
|
|
# define BC_MAX_SCALE_STR "4294967295"
|
|
# define BC_MAX_STRING_STR "4294967294"
|
|
#elif UINT_MAX == 18446744073709551615
|
|
# define BC_MAX_SCALE_STR "18446744073709551615"
|
|
# define BC_MAX_STRING_STR "18446744073709551614"
|
|
#else
|
|
# error Strange UINT_MAX
|
|
#endif
|
|
#define BC_MAX_NUM_STR BC_MAX_STRING_STR
|
|
|
|
struct globals {
|
|
IF_FEATURE_BC_SIGNALS(smallint ttyin;)
|
|
IF_FEATURE_CLEAN_UP(smallint exiting;)
|
|
char sbgn;
|
|
char send;
|
|
|
|
BcParse prs;
|
|
BcProgram prog;
|
|
|
|
// For error messages. Can be set to current parsed line,
|
|
// or [TODO] to current executing line (can be before last parsed one)
|
|
unsigned err_line;
|
|
|
|
BcVec files;
|
|
|
|
char *env_args;
|
|
|
|
#if ENABLE_FEATURE_EDITING
|
|
line_input_t *line_input_state;
|
|
#endif
|
|
} FIX_ALIASING;
|
|
#define G (*ptr_to_globals)
|
|
#define INIT_G() do { \
|
|
SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \
|
|
} while (0)
|
|
#define FREE_G() do { \
|
|
FREE_PTR_TO_GLOBALS(); \
|
|
} while (0)
|
|
#define G_posix (ENABLE_BC && (option_mask32 & BC_FLAG_S))
|
|
#define G_warn (ENABLE_BC && (option_mask32 & BC_FLAG_W))
|
|
#define G_exreg (ENABLE_DC && (option_mask32 & DC_FLAG_X))
|
|
#if ENABLE_FEATURE_BC_SIGNALS
|
|
# define G_interrupt bb_got_signal
|
|
# define G_ttyin G.ttyin
|
|
#else
|
|
# define G_interrupt 0
|
|
# define G_ttyin 0
|
|
#endif
|
|
#if ENABLE_FEATURE_CLEAN_UP
|
|
# define G_exiting G.exiting
|
|
#else
|
|
# define G_exiting 0
|
|
#endif
|
|
#define IS_BC (ENABLE_BC && (!ENABLE_DC || applet_name[0] == 'b'))
|
|
|
|
#if ENABLE_BC
|
|
|
|
// This is a bit array that corresponds to token types. An entry is
|
|
// true if the token is valid in an expression, false otherwise.
|
|
enum {
|
|
BC_PARSE_EXPRS_BITS = 0
|
|
+ ((uint64_t)((0 << 0)+(0 << 1)+(1 << 2)+(1 << 3)+(1 << 4)+(1 << 5)+(1 << 6)+(1 << 7)) << (0*8))
|
|
+ ((uint64_t)((1 << 0)+(1 << 1)+(1 << 2)+(1 << 3)+(1 << 4)+(1 << 5)+(1 << 6)+(1 << 7)) << (1*8))
|
|
+ ((uint64_t)((1 << 0)+(1 << 1)+(1 << 2)+(1 << 3)+(1 << 4)+(1 << 5)+(1 << 6)+(1 << 7)) << (2*8))
|
|
+ ((uint64_t)((1 << 0)+(1 << 1)+(1 << 2)+(0 << 3)+(0 << 4)+(1 << 5)+(1 << 6)+(0 << 7)) << (3*8))
|
|
+ ((uint64_t)((0 << 0)+(0 << 1)+(0 << 2)+(0 << 3)+(0 << 4)+(0 << 5)+(1 << 6)+(1 << 7)) << (4*8))
|
|
+ ((uint64_t)((0 << 0)+(0 << 1)+(0 << 2)+(0 << 3)+(0 << 4)+(0 << 5)+(0 << 6)+(1 << 7)) << (5*8))
|
|
+ ((uint64_t)((0 << 0)+(1 << 1)+(1 << 2)+(1 << 3)+(1 << 4)+(0 << 5)+(0 << 6)+(1 << 7)) << (6*8))
|
|
+ ((uint64_t)((0 << 0)+(1 << 1)+(1 << 2)+(0 << 3) ) << (7*8))
|
|
};
|
|
static ALWAYS_INLINE long bc_parse_exprs(unsigned i)
|
|
{
|
|
#if ULONG_MAX > 0xffffffff
|
|
// 64-bit version (will not work correctly for 32-bit longs!)
|
|
return BC_PARSE_EXPRS_BITS & (1UL << i);
|
|
#else
|
|
// 32-bit version
|
|
unsigned long m = (uint32_t)BC_PARSE_EXPRS_BITS;
|
|
if (i >= 32) {
|
|
m = (uint32_t)(BC_PARSE_EXPRS_BITS >> 32);
|
|
i &= 31;
|
|
}
|
|
return m & (1UL << i);
|
|
#endif
|
|
}
|
|
|
|
// This is an array of data for operators that correspond to token types.
|
|
static const uint8_t bc_parse_ops[] = {
|
|
#define OP(p,l) ((int)(l) * 0x10 + (p))
|
|
OP(0, false), OP( 0, false ), // inc dec
|
|
OP(1, false), // neg
|
|
OP(2, false),
|
|
OP(3, true ), OP( 3, true ), OP( 3, true ), // pow mul div
|
|
OP(4, true ), OP( 4, true ), // mod + -
|
|
OP(6, true ), OP( 6, true ), OP( 6, true ), OP( 6, true ), OP( 6, true ), OP( 6, true ), // == <= >= != < >
|
|
OP(1, false), // not
|
|
OP(7, true ), OP( 7, true ), // or and
|
|
OP(5, false), OP( 5, false ), OP( 5, false ), OP( 5, false ), OP( 5, false ), // ^= *= /= %= +=
|
|
OP(5, false), OP( 5, false ), // -= =
|
|
#undef OP
|
|
};
|
|
#define bc_parse_op_PREC(i) (bc_parse_ops[i] & 0x0f)
|
|
#define bc_parse_op_LEFT(i) (bc_parse_ops[i] & 0x10)
|
|
|
|
// Byte array of up to 4 BC_LEX's, packed into 32-bit word
|
|
typedef uint32_t BcParseNext;
|
|
|
|
// These identify what tokens can come after expressions in certain cases.
|
|
enum {
|
|
#define BC_PARSE_NEXT4(a,b,c,d) ( (a) | ((b)<<8) | ((c)<<16) | ((((d)|0x80)<<24)) )
|
|
#define BC_PARSE_NEXT2(a,b) BC_PARSE_NEXT4(a,b,0xff,0xff)
|
|
#define BC_PARSE_NEXT1(a) BC_PARSE_NEXT4(a,0xff,0xff,0xff)
|
|
bc_parse_next_expr = BC_PARSE_NEXT4(BC_LEX_NLINE, BC_LEX_SCOLON, BC_LEX_RBRACE, BC_LEX_EOF),
|
|
bc_parse_next_param = BC_PARSE_NEXT2(BC_LEX_RPAREN, BC_LEX_COMMA),
|
|
bc_parse_next_print = BC_PARSE_NEXT4(BC_LEX_COMMA, BC_LEX_NLINE, BC_LEX_SCOLON, BC_LEX_EOF),
|
|
bc_parse_next_rel = BC_PARSE_NEXT1(BC_LEX_RPAREN),
|
|
bc_parse_next_elem = BC_PARSE_NEXT1(BC_LEX_RBRACKET),
|
|
bc_parse_next_for = BC_PARSE_NEXT1(BC_LEX_SCOLON),
|
|
bc_parse_next_read = BC_PARSE_NEXT2(BC_LEX_NLINE, BC_LEX_EOF),
|
|
#undef BC_PARSE_NEXT4
|
|
#undef BC_PARSE_NEXT2
|
|
#undef BC_PARSE_NEXT1
|
|
};
|
|
#endif // ENABLE_BC
|
|
|
|
#if ENABLE_DC
|
|
static const //BcLexType - should be this type, but narrower type saves size:
|
|
uint8_t
|
|
dc_lex_regs[] = {
|
|
BC_LEX_OP_REL_EQ, BC_LEX_OP_REL_LE, BC_LEX_OP_REL_GE, BC_LEX_OP_REL_NE,
|
|
BC_LEX_OP_REL_LT, BC_LEX_OP_REL_GT, BC_LEX_SCOLON, BC_LEX_COLON,
|
|
BC_LEX_ELSE, BC_LEX_LOAD, BC_LEX_LOAD_POP, BC_LEX_OP_ASSIGN,
|
|
BC_LEX_STORE_PUSH,
|
|
};
|
|
|
|
static const //BcLexType - should be this type
|
|
uint8_t
|
|
dc_lex_tokens[] = {
|
|
BC_LEX_OP_MODULUS, BC_LEX_INVALID, BC_LEX_INVALID, BC_LEX_LPAREN,
|
|
BC_LEX_INVALID, BC_LEX_OP_MULTIPLY, BC_LEX_OP_PLUS, BC_LEX_INVALID,
|
|
BC_LEX_OP_MINUS, BC_LEX_INVALID, BC_LEX_OP_DIVIDE,
|
|
BC_LEX_INVALID, BC_LEX_INVALID, BC_LEX_INVALID, BC_LEX_INVALID,
|
|
BC_LEX_INVALID, BC_LEX_INVALID, BC_LEX_INVALID, BC_LEX_INVALID,
|
|
BC_LEX_INVALID, BC_LEX_INVALID,
|
|
BC_LEX_COLON, BC_LEX_SCOLON, BC_LEX_OP_REL_GT, BC_LEX_OP_REL_EQ,
|
|
BC_LEX_OP_REL_LT, BC_LEX_KEY_READ, BC_LEX_INVALID,
|
|
BC_LEX_INVALID, BC_LEX_INVALID, BC_LEX_INVALID, BC_LEX_INVALID,
|
|
BC_LEX_INVALID, BC_LEX_INVALID, BC_LEX_EQ_NO_REG, BC_LEX_INVALID,
|
|
BC_LEX_KEY_IBASE, BC_LEX_INVALID, BC_LEX_KEY_SCALE, BC_LEX_LOAD_POP,
|
|
BC_LEX_INVALID, BC_LEX_OP_BOOL_NOT, BC_LEX_KEY_OBASE, BC_LEX_PRINT_STREAM,
|
|
BC_LEX_NQUIT, BC_LEX_POP, BC_LEX_STORE_PUSH, BC_LEX_INVALID, BC_LEX_INVALID,
|
|
BC_LEX_INVALID, BC_LEX_INVALID, BC_LEX_SCALE_FACTOR, BC_LEX_INVALID,
|
|
BC_LEX_KEY_LENGTH, BC_LEX_INVALID, BC_LEX_INVALID, BC_LEX_INVALID,
|
|
BC_LEX_OP_POWER, BC_LEX_NEG, BC_LEX_INVALID,
|
|
BC_LEX_ASCIIFY, BC_LEX_INVALID, BC_LEX_CLEAR_STACK, BC_LEX_DUPLICATE,
|
|
BC_LEX_ELSE, BC_LEX_PRINT_STACK, BC_LEX_INVALID, BC_LEX_INVALID,
|
|
BC_LEX_STORE_IBASE, BC_LEX_INVALID, BC_LEX_STORE_SCALE, BC_LEX_LOAD,
|
|
BC_LEX_INVALID, BC_LEX_PRINT_POP, BC_LEX_STORE_OBASE, BC_LEX_KEY_PRINT,
|
|
BC_LEX_KEY_QUIT, BC_LEX_SWAP, BC_LEX_OP_ASSIGN, BC_LEX_INVALID,
|
|
BC_LEX_INVALID, BC_LEX_KEY_SQRT, BC_LEX_INVALID, BC_LEX_EXECUTE,
|
|
BC_LEX_INVALID, BC_LEX_STACK_LEVEL,
|
|
BC_LEX_LBRACE, BC_LEX_OP_MODEXP, BC_LEX_INVALID, BC_LEX_OP_DIVMOD,
|
|
BC_LEX_INVALID
|
|
};
|
|
|
|
static const //BcInst - should be this type. Using signed narrow type since BC_INST_INVALID is -1
|
|
int8_t
|
|
dc_parse_insts[] = {
|
|
BC_INST_INVALID, BC_INST_INVALID, BC_INST_INVALID, BC_INST_REL_GE,
|
|
BC_INST_INVALID, BC_INST_POWER, BC_INST_MULTIPLY, BC_INST_DIVIDE,
|
|
BC_INST_MODULUS, BC_INST_PLUS, BC_INST_MINUS,
|
|
BC_INST_INVALID, BC_INST_INVALID, BC_INST_INVALID, BC_INST_INVALID,
|
|
BC_INST_INVALID, BC_INST_INVALID,
|
|
BC_INST_BOOL_NOT, BC_INST_INVALID, BC_INST_INVALID,
|
|
BC_INST_INVALID, BC_INST_INVALID, BC_INST_INVALID, BC_INST_INVALID,
|
|
BC_INST_INVALID, BC_INST_INVALID, BC_INST_INVALID,
|
|
BC_INST_INVALID, BC_INST_INVALID, BC_INST_REL_GT, BC_INST_INVALID,
|
|
BC_INST_INVALID, BC_INST_INVALID, BC_INST_INVALID, BC_INST_REL_GE,
|
|
BC_INST_INVALID, BC_INST_INVALID,
|
|
BC_INST_INVALID, BC_INST_INVALID, BC_INST_INVALID,
|
|
BC_INST_INVALID, BC_INST_INVALID, BC_INST_INVALID, BC_INST_INVALID,
|
|
BC_INST_INVALID, BC_INST_INVALID, BC_INST_INVALID, BC_INST_IBASE,
|
|
BC_INST_INVALID, BC_INST_INVALID, BC_INST_LENGTH, BC_INST_INVALID,
|
|
BC_INST_OBASE, BC_INST_PRINT, BC_INST_QUIT, BC_INST_INVALID,
|
|
BC_INST_INVALID, BC_INST_SCALE, BC_INST_SQRT, BC_INST_INVALID,
|
|
BC_INST_REL_EQ, BC_INST_MODEXP, BC_INST_DIVMOD, BC_INST_INVALID,
|
|
BC_INST_INVALID, BC_INST_EXECUTE, BC_INST_PRINT_STACK, BC_INST_CLEAR_STACK,
|
|
BC_INST_STACK_LEN, BC_INST_DUPLICATE, BC_INST_SWAP, BC_INST_POP,
|
|
BC_INST_ASCIIFY, BC_INST_PRINT_STREAM, BC_INST_INVALID, BC_INST_INVALID,
|
|
BC_INST_INVALID, BC_INST_INVALID, BC_INST_INVALID, BC_INST_INVALID,
|
|
BC_INST_PRINT, BC_INST_NQUIT, BC_INST_SCALE_FUNC,
|
|
};
|
|
#endif // ENABLE_DC
|
|
|
|
static const BcNumBinaryOp bc_program_ops[] = {
|
|
bc_num_pow, bc_num_mul, bc_num_div, bc_num_mod, bc_num_add, bc_num_sub,
|
|
};
|
|
|
|
static void fflush_and_check(void)
|
|
{
|
|
fflush_all();
|
|
if (ferror(stdout) || ferror(stderr))
|
|
bb_perror_msg_and_die("output error");
|
|
}
|
|
|
|
#if ENABLE_FEATURE_CLEAN_UP
|
|
#define QUIT_OR_RETURN_TO_MAIN \
|
|
do { \
|
|
IF_FEATURE_BC_SIGNALS(G_ttyin = 0;) /* do not loop in main loop anymore */ \
|
|
G_exiting = 1; \
|
|
return BC_STATUS_FAILURE; \
|
|
} while (0)
|
|
#else
|
|
#define QUIT_OR_RETURN_TO_MAIN quit()
|
|
#endif
|
|
|
|
static void quit(void) NORETURN;
|
|
static void quit(void)
|
|
{
|
|
if (ferror(stdin))
|
|
bb_perror_msg_and_die("input error");
|
|
fflush_and_check();
|
|
exit(0);
|
|
}
|
|
|
|
static void bc_verror_msg(const char *fmt, va_list p)
|
|
{
|
|
const char *sv = sv; /* for compiler */
|
|
if (G.prog.file) {
|
|
sv = applet_name;
|
|
applet_name = xasprintf("%s: %s:%u", applet_name, G.prog.file, G.err_line);
|
|
}
|
|
bb_verror_msg(fmt, p, NULL);
|
|
if (G.prog.file) {
|
|
free((char*)applet_name);
|
|
applet_name = sv;
|
|
}
|
|
}
|
|
|
|
static NOINLINE int bc_error_fmt(const char *fmt, ...)
|
|
{
|
|
va_list p;
|
|
|
|
va_start(p, fmt);
|
|
bc_verror_msg(fmt, p);
|
|
va_end(p);
|
|
|
|
if (!ENABLE_FEATURE_CLEAN_UP && !G_ttyin)
|
|
exit(1);
|
|
return BC_STATUS_FAILURE;
|
|
}
|
|
|
|
#if ENABLE_BC
|
|
static NOINLINE int bc_posix_error_fmt(const char *fmt, ...)
|
|
{
|
|
va_list p;
|
|
|
|
// Are non-POSIX constructs totally ok?
|
|
if (!(option_mask32 & (BC_FLAG_S|BC_FLAG_W)))
|
|
return BC_STATUS_SUCCESS; // yes
|
|
|
|
va_start(p, fmt);
|
|
bc_verror_msg(fmt, p);
|
|
va_end(p);
|
|
|
|
// Do we treat non-POSIX constructs as errors?
|
|
if (!(option_mask32 & BC_FLAG_S))
|
|
return BC_STATUS_SUCCESS; // no, it's a warning
|
|
if (!ENABLE_FEATURE_CLEAN_UP && !G_ttyin)
|
|
exit(1);
|
|
return BC_STATUS_FAILURE;
|
|
}
|
|
#endif
|
|
|
|
// We use error functions with "return bc_error(FMT[, PARAMS])" idiom.
|
|
// This idiom begs for tail-call optimization, but for it to work,
|
|
// function must not have caller-cleaned parameters on stack.
|
|
// Unfortunately, vararg function API does exactly that on most arches.
|
|
// Thus, use these shims for the cases when we have no vararg PARAMS:
|
|
static int bc_error(const char *msg)
|
|
{
|
|
return bc_error_fmt("%s", msg);
|
|
}
|
|
#if ENABLE_BC
|
|
static int bc_POSIX_requires(const char *msg)
|
|
{
|
|
return bc_posix_error_fmt("POSIX requires %s", msg);
|
|
}
|
|
static int bc_POSIX_does_not_allow(const char *msg)
|
|
{
|
|
return bc_posix_error_fmt("%s%s", "POSIX does not allow ", msg);
|
|
}
|
|
static int bc_POSIX_does_not_allow_bool_ops_this_is_bad(const char *msg)
|
|
{
|
|
return bc_posix_error_fmt("%s%s %s", "POSIX does not allow ", "boolean operators; the following is bad:", msg);
|
|
}
|
|
static int bc_POSIX_does_not_allow_empty_X_expression_in_for(const char *msg)
|
|
{
|
|
return bc_posix_error_fmt("%san empty %s expression in a for loop", "POSIX does not allow ", msg);
|
|
}
|
|
#endif
|
|
static int bc_error_bad_character(char c)
|
|
{
|
|
return bc_error_fmt("bad character '%c'", c);
|
|
}
|
|
static int bc_error_bad_expression(void)
|
|
{
|
|
return bc_error("bad expression");
|
|
}
|
|
static int bc_error_bad_token(void)
|
|
{
|
|
return bc_error("bad token");
|
|
}
|
|
static int bc_error_stack_has_too_few_elements(void)
|
|
{
|
|
return bc_error("stack has too few elements");
|
|
}
|
|
static int bc_error_variable_is_wrong_type(void)
|
|
{
|
|
return bc_error("variable is wrong type");
|
|
}
|
|
static int bc_error_nested_read_call(void)
|
|
{
|
|
return bc_error("read() call inside of a read() call");
|
|
}
|
|
|
|
static void bc_vec_grow(BcVec *v, size_t n)
|
|
{
|
|
size_t cap = v->cap * 2;
|
|
while (cap < v->len + n) cap *= 2;
|
|
v->v = xrealloc(v->v, v->size * cap);
|
|
v->cap = cap;
|
|
}
|
|
|
|
static void bc_vec_init(BcVec *v, size_t esize, BcVecFree dtor)
|
|
{
|
|
v->size = esize;
|
|
v->cap = BC_VEC_START_CAP;
|
|
v->len = 0;
|
|
v->dtor = dtor;
|
|
v->v = xmalloc(esize * BC_VEC_START_CAP);
|
|
}
|
|
|
|
static void bc_char_vec_init(BcVec *v)
|
|
{
|
|
bc_vec_init(v, sizeof(char), NULL);
|
|
}
|
|
|
|
static void bc_vec_expand(BcVec *v, size_t req)
|
|
{
|
|
if (v->cap < req) {
|
|
v->v = xrealloc(v->v, v->size * req);
|
|
v->cap = req;
|
|
}
|
|
}
|
|
|
|
static void bc_vec_pop(BcVec *v)
|
|
{
|
|
v->len--;
|
|
if (v->dtor)
|
|
v->dtor(v->v + (v->size * v->len));
|
|
}
|
|
|
|
static void bc_vec_npop(BcVec *v, size_t n)
|
|
{
|
|
if (!v->dtor)
|
|
v->len -= n;
|
|
else {
|
|
size_t len = v->len - n;
|
|
while (v->len > len) v->dtor(v->v + (v->size * --v->len));
|
|
}
|
|
}
|
|
|
|
static void bc_vec_pop_all(BcVec *v)
|
|
{
|
|
bc_vec_npop(v, v->len);
|
|
}
|
|
|
|
static void bc_vec_push(BcVec *v, const void *data)
|
|
{
|
|
if (v->len + 1 > v->cap) bc_vec_grow(v, 1);
|
|
memmove(v->v + (v->size * v->len), data, v->size);
|
|
v->len += 1;
|
|
}
|
|
|
|
static void bc_vec_pushByte(BcVec *v, char data)
|
|
{
|
|
bc_vec_push(v, &data);
|
|
}
|
|
|
|
static void bc_vec_pushZeroByte(BcVec *v)
|
|
{
|
|
//bc_vec_pushByte(v, '\0');
|
|
// better:
|
|
bc_vec_push(v, &const_int_0);
|
|
}
|
|
|
|
static void bc_vec_pushAt(BcVec *v, const void *data, size_t idx)
|
|
{
|
|
if (idx == v->len)
|
|
bc_vec_push(v, data);
|
|
else {
|
|
|
|
char *ptr;
|
|
|
|
if (v->len == v->cap) bc_vec_grow(v, 1);
|
|
|
|
ptr = v->v + v->size * idx;
|
|
|
|
memmove(ptr + v->size, ptr, v->size * (v->len++ - idx));
|
|
memmove(ptr, data, v->size);
|
|
}
|
|
}
|
|
|
|
static void bc_vec_string(BcVec *v, size_t len, const char *str)
|
|
{
|
|
bc_vec_pop_all(v);
|
|
bc_vec_expand(v, len + 1);
|
|
memcpy(v->v, str, len);
|
|
v->len = len;
|
|
|
|
bc_vec_pushZeroByte(v);
|
|
}
|
|
|
|
static void bc_vec_concat(BcVec *v, const char *str)
|
|
{
|
|
size_t len;
|
|
|
|
if (v->len == 0) bc_vec_pushZeroByte(v);
|
|
|
|
len = v->len + strlen(str);
|
|
|
|
if (v->cap < len) bc_vec_grow(v, len - v->len);
|
|
strcpy(v->v + v->len - 1, str);
|
|
|
|
v->len = len;
|
|
}
|
|
|
|
static void *bc_vec_item(const BcVec *v, size_t idx)
|
|
{
|
|
return v->v + v->size * idx;
|
|
}
|
|
|
|
static void *bc_vec_item_rev(const BcVec *v, size_t idx)
|
|
{
|
|
return v->v + v->size * (v->len - idx - 1);
|
|
}
|
|
|
|
static void *bc_vec_top(const BcVec *v)
|
|
{
|
|
return v->v + v->size * (v->len - 1);
|
|
}
|
|
|
|
static void bc_vec_free(void *vec)
|
|
{
|
|
BcVec *v = (BcVec *) vec;
|
|
bc_vec_pop_all(v);
|
|
free(v->v);
|
|
}
|
|
|
|
static int bc_id_cmp(const void *e1, const void *e2)
|
|
{
|
|
return strcmp(((const BcId *) e1)->name, ((const BcId *) e2)->name);
|
|
}
|
|
|
|
static void bc_id_free(void *id)
|
|
{
|
|
free(((BcId *) id)->name);
|
|
}
|
|
|
|
static size_t bc_map_find(const BcVec *v, const void *ptr)
|
|
{
|
|
size_t low = 0, high = v->len;
|
|
|
|
while (low < high) {
|
|
|
|
size_t mid = (low + high) / 2;
|
|
BcId *id = bc_vec_item(v, mid);
|
|
int result = bc_id_cmp(ptr, id);
|
|
|
|
if (result == 0)
|
|
return mid;
|
|
else if (result < 0)
|
|
high = mid;
|
|
else
|
|
low = mid + 1;
|
|
}
|
|
|
|
return low;
|
|
}
|
|
|
|
static int bc_map_insert(BcVec *v, const void *ptr, size_t *i)
|
|
{
|
|
size_t n = *i = bc_map_find(v, ptr);
|
|
|
|
if (n == v->len)
|
|
bc_vec_push(v, ptr);
|
|
else if (!bc_id_cmp(ptr, bc_vec_item(v, n)))
|
|
return 0; // "was not inserted"
|
|
else
|
|
bc_vec_pushAt(v, ptr, n);
|
|
return 1; // "was inserted"
|
|
}
|
|
|
|
#if ENABLE_BC
|
|
static size_t bc_map_index(const BcVec *v, const void *ptr)
|
|
{
|
|
size_t i = bc_map_find(v, ptr);
|
|
if (i >= v->len) return BC_VEC_INVALID_IDX;
|
|
return bc_id_cmp(ptr, bc_vec_item(v, i)) ? BC_VEC_INVALID_IDX : i;
|
|
}
|
|
#endif
|
|
|
|
static int push_input_byte(BcVec *vec, char c)
|
|
{
|
|
if ((c < ' ' && c != '\t' && c != '\r' && c != '\n') // also allow '\v' '\f'?
|
|
|| c > 0x7e
|
|
) {
|
|
// Bad chars on this line, ignore entire line
|
|
bc_error_fmt("illegal character 0x%02x", c);
|
|
return 1;
|
|
}
|
|
bc_vec_pushByte(vec, (char)c);
|
|
return 0;
|
|
}
|
|
|
|
static BcStatus bc_read_line(BcVec *vec, const char *prompt)
|
|
{
|
|
BcStatus s;
|
|
bool bad_chars;
|
|
|
|
if (G_posix) prompt = "";
|
|
|
|
s = BC_STATUS_SUCCESS;
|
|
do {
|
|
int c;
|
|
|
|
bad_chars = 0;
|
|
bc_vec_pop_all(vec);
|
|
|
|
fflush_and_check();
|
|
|
|
#if ENABLE_FEATURE_BC_SIGNALS
|
|
if (G_interrupt) { // ^C was pressed
|
|
intr:
|
|
G_interrupt = 0;
|
|
fputs(IS_BC
|
|
? "\ninterrupt (type \"quit\" to exit)\n"
|
|
: "\ninterrupt (type \"q\" to exit)\n"
|
|
, stderr);
|
|
}
|
|
# if ENABLE_FEATURE_EDITING
|
|
if (G_ttyin) {
|
|
int n, i;
|
|
# define line_buf bb_common_bufsiz1
|
|
n = read_line_input(G.line_input_state, prompt, line_buf, COMMON_BUFSIZE);
|
|
if (n <= 0) { // read errors or EOF, or ^D, or ^C
|
|
if (n == 0) // ^C
|
|
goto intr;
|
|
s = BC_STATUS_EOF;
|
|
break;
|
|
}
|
|
i = 0;
|
|
for (;;) {
|
|
c = line_buf[i++];
|
|
if (!c) break;
|
|
bad_chars |= push_input_byte(vec, c);
|
|
}
|
|
# undef line_buf
|
|
} else
|
|
# endif
|
|
#endif
|
|
{
|
|
if (G_ttyin)
|
|
fputs(prompt, stderr);
|
|
IF_FEATURE_BC_SIGNALS(errno = 0;)
|
|
do {
|
|
c = fgetc(stdin);
|
|
#if ENABLE_FEATURE_BC_SIGNALS && !ENABLE_FEATURE_EDITING
|
|
// Both conditions appear simultaneously, check both just in case
|
|
if (errno == EINTR || G_interrupt) {
|
|
// ^C was pressed
|
|
clearerr(stdin);
|
|
goto intr;
|
|
}
|
|
#endif
|
|
if (c == EOF) {
|
|
if (ferror(stdin))
|
|
quit(); // this emits error message
|
|
s = BC_STATUS_EOF;
|
|
// Note: EOF does not append '\n', therefore:
|
|
// printf 'print 123\n' | bc - works
|
|
// printf 'print 123' | bc - fails (syntax error)
|
|
break;
|
|
}
|
|
bad_chars |= push_input_byte(vec, c);
|
|
} while (c != '\n');
|
|
}
|
|
} while (bad_chars);
|
|
|
|
bc_vec_pushZeroByte(vec);
|
|
|
|
return s;
|
|
}
|
|
|
|
static char* bc_read_file(const char *path)
|
|
{
|
|
char *buf;
|
|
size_t size = ((size_t) -1);
|
|
size_t i;
|
|
|
|
// Never returns NULL (dies on errors)
|
|
buf = xmalloc_xopen_read_close(path, &size);
|
|
|
|
for (i = 0; i < size; ++i) {
|
|
char c = buf[i];
|
|
if ((c < ' ' && c != '\t' && c != '\r' && c != '\n') // also allow '\v' '\f'?
|
|
|| c > 0x7e
|
|
) {
|
|
free(buf);
|
|
buf = NULL;
|
|
break;
|
|
}
|
|
}
|
|
|
|
return buf;
|
|
}
|
|
|
|
static void bc_num_setToZero(BcNum *n, size_t scale)
|
|
{
|
|
n->len = 0;
|
|
n->neg = false;
|
|
n->rdx = scale;
|
|
}
|
|
|
|
static void bc_num_zero(BcNum *n)
|
|
{
|
|
bc_num_setToZero(n, 0);
|
|
}
|
|
|
|
static void bc_num_one(BcNum *n)
|
|
{
|
|
bc_num_setToZero(n, 0);
|
|
n->len = 1;
|
|
n->num[0] = 1;
|
|
}
|
|
|
|
static void bc_num_ten(BcNum *n)
|
|
{
|
|
bc_num_setToZero(n, 0);
|
|
n->len = 2;
|
|
n->num[0] = 0;
|
|
n->num[1] = 1;
|
|
}
|
|
|
|
static void bc_num_init(BcNum *n, size_t req)
|
|
{
|
|
req = req >= BC_NUM_DEF_SIZE ? req : BC_NUM_DEF_SIZE;
|
|
memset(n, 0, sizeof(BcNum));
|
|
n->num = xmalloc(req);
|
|
n->cap = req;
|
|
}
|
|
|
|
static void bc_num_expand(BcNum *n, size_t req)
|
|
{
|
|
req = req >= BC_NUM_DEF_SIZE ? req : BC_NUM_DEF_SIZE;
|
|
if (req > n->cap) {
|
|
n->num = xrealloc(n->num, req);
|
|
n->cap = req;
|
|
}
|
|
}
|
|
|
|
static void bc_num_free(void *num)
|
|
{
|
|
free(((BcNum *) num)->num);
|
|
}
|
|
|
|
static void bc_num_copy(BcNum *d, BcNum *s)
|
|
{
|
|
if (d != s) {
|
|
bc_num_expand(d, s->cap);
|
|
d->len = s->len;
|
|
d->neg = s->neg;
|
|
d->rdx = s->rdx;
|
|
memcpy(d->num, s->num, sizeof(BcDig) * d->len);
|
|
}
|
|
}
|
|
|
|
static BcStatus bc_num_ulong(BcNum *n, unsigned long *result_p)
|
|
{
|
|
size_t i;
|
|
unsigned long pow, result;
|
|
|
|
if (n->neg) return bc_error("negative number");
|
|
|
|
for (result = 0, pow = 1, i = n->rdx; i < n->len; ++i) {
|
|
|
|
unsigned long prev = result, powprev = pow;
|
|
|
|
result += ((unsigned long) n->num[i]) * pow;
|
|
pow *= 10;
|
|
|
|
if (result < prev || pow < powprev)
|
|
return bc_error("overflow");
|
|
prev = result;
|
|
powprev = pow;
|
|
}
|
|
*result_p = result;
|
|
|
|
return BC_STATUS_SUCCESS;
|
|
}
|
|
|
|
static void bc_num_ulong2num(BcNum *n, unsigned long val)
|
|
{
|
|
size_t len;
|
|
BcDig *ptr;
|
|
unsigned long i;
|
|
|
|
bc_num_zero(n);
|
|
|
|
if (val == 0) return;
|
|
|
|
for (len = 1, i = ULONG_MAX; i != 0; i /= 10, ++len) bc_num_expand(n, len);
|
|
for (ptr = n->num, i = 0; val; ++i, ++n->len, val /= 10) ptr[i] = val % 10;
|
|
}
|
|
|
|
static void bc_num_subArrays(BcDig *restrict a, BcDig *restrict b,
|
|
size_t len)
|
|
{
|
|
size_t i, j;
|
|
for (i = 0; i < len; ++i) {
|
|
for (a[i] -= b[i], j = 0; a[i + j] < 0;) {
|
|
a[i + j++] += 10;
|
|
a[i + j] -= 1;
|
|
}
|
|
}
|
|
}
|
|
|
|
#define BC_NUM_NEG(n, neg) ((((ssize_t)(n)) ^ -((ssize_t)(neg))) + (neg))
|
|
#define BC_NUM_ONE(n) ((n)->len == 1 && (n)->rdx == 0 && (n)->num[0] == 1)
|
|
#define BC_NUM_INT(n) ((n)->len - (n)->rdx)
|
|
//#define BC_NUM_AREQ(a, b) (BC_MAX((a)->rdx, (b)->rdx) + BC_MAX(BC_NUM_INT(a), BC_NUM_INT(b)) + 1)
|
|
static /*ALWAYS_INLINE*/ size_t BC_NUM_AREQ(BcNum *a, BcNum *b)
|
|
{
|
|
return BC_MAX(a->rdx, b->rdx) + BC_MAX(BC_NUM_INT(a), BC_NUM_INT(b)) + 1;
|
|
}
|
|
//#define BC_NUM_MREQ(a, b, scale) (BC_NUM_INT(a) + BC_NUM_INT(b) + BC_MAX((scale), (a)->rdx + (b)->rdx) + 1)
|
|
static /*ALWAYS_INLINE*/ size_t BC_NUM_MREQ(BcNum *a, BcNum *b, size_t scale)
|
|
{
|
|
return BC_NUM_INT(a) + BC_NUM_INT(b) + BC_MAX(scale, a->rdx + b->rdx) + 1;
|
|
}
|
|
|
|
static ssize_t bc_num_compare(BcDig *restrict a, BcDig *restrict b, size_t len)
|
|
{
|
|
size_t i;
|
|
int c = 0;
|
|
for (i = len - 1; i < len && !(c = a[i] - b[i]); --i);
|
|
return BC_NUM_NEG(i + 1, c < 0);
|
|
}
|
|
|
|
static ssize_t bc_num_cmp(BcNum *a, BcNum *b)
|
|
{
|
|
size_t i, min, a_int, b_int, diff;
|
|
BcDig *max_num, *min_num;
|
|
bool a_max, neg = false;
|
|
ssize_t cmp;
|
|
|
|
if (a == b) return 0;
|
|
if (a->len == 0) return BC_NUM_NEG(!!b->len, !b->neg);
|
|
if (b->len == 0) return BC_NUM_NEG(1, a->neg);
|
|
if (a->neg) {
|
|
if (b->neg)
|
|
neg = true;
|
|
else
|
|
return -1;
|
|
}
|
|
else if (b->neg)
|
|
return 1;
|
|
|
|
a_int = BC_NUM_INT(a);
|
|
b_int = BC_NUM_INT(b);
|
|
a_int -= b_int;
|
|
a_max = (a->rdx > b->rdx);
|
|
|
|
if (a_int != 0) return (ssize_t) a_int;
|
|
|
|
if (a_max) {
|
|
min = b->rdx;
|
|
diff = a->rdx - b->rdx;
|
|
max_num = a->num + diff;
|
|
min_num = b->num;
|
|
}
|
|
else {
|
|
min = a->rdx;
|
|
diff = b->rdx - a->rdx;
|
|
max_num = b->num + diff;
|
|
min_num = a->num;
|
|
}
|
|
|
|
cmp = bc_num_compare(max_num, min_num, b_int + min);
|
|
if (cmp != 0) return BC_NUM_NEG(cmp, (!a_max) != neg);
|
|
|
|
for (max_num -= diff, i = diff - 1; i < diff; --i) {
|
|
if (max_num[i]) return BC_NUM_NEG(1, (!a_max) != neg);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void bc_num_truncate(BcNum *n, size_t places)
|
|
{
|
|
if (places == 0) return;
|
|
|
|
n->rdx -= places;
|
|
|
|
if (n->len != 0) {
|
|
n->len -= places;
|
|
memmove(n->num, n->num + places, n->len * sizeof(BcDig));
|
|
}
|
|
}
|
|
|
|
static void bc_num_extend(BcNum *n, size_t places)
|
|
{
|
|
size_t len = n->len + places;
|
|
|
|
if (places != 0) {
|
|
|
|
if (n->cap < len) bc_num_expand(n, len);
|
|
|
|
memmove(n->num + places, n->num, sizeof(BcDig) * n->len);
|
|
memset(n->num, 0, sizeof(BcDig) * places);
|
|
|
|
n->len += places;
|
|
n->rdx += places;
|
|
}
|
|
}
|
|
|
|
static void bc_num_clean(BcNum *n)
|
|
{
|
|
while (n->len > 0 && n->num[n->len - 1] == 0) --n->len;
|
|
if (n->len == 0)
|
|
n->neg = false;
|
|
else if (n->len < n->rdx)
|
|
n->len = n->rdx;
|
|
}
|
|
|
|
static void bc_num_retireMul(BcNum *n, size_t scale, bool neg1, bool neg2)
|
|
{
|
|
if (n->rdx < scale)
|
|
bc_num_extend(n, scale - n->rdx);
|
|
else
|
|
bc_num_truncate(n, n->rdx - scale);
|
|
|
|
bc_num_clean(n);
|
|
if (n->len != 0) n->neg = !neg1 != !neg2;
|
|
}
|
|
|
|
static void bc_num_split(BcNum *restrict n, size_t idx, BcNum *restrict a,
|
|
BcNum *restrict b)
|
|
{
|
|
if (idx < n->len) {
|
|
|
|
b->len = n->len - idx;
|
|
a->len = idx;
|
|
a->rdx = b->rdx = 0;
|
|
|
|
memcpy(b->num, n->num + idx, b->len * sizeof(BcDig));
|
|
memcpy(a->num, n->num, idx * sizeof(BcDig));
|
|
}
|
|
else {
|
|
bc_num_zero(b);
|
|
bc_num_copy(a, n);
|
|
}
|
|
|
|
bc_num_clean(a);
|
|
bc_num_clean(b);
|
|
}
|
|
|
|
static BcStatus bc_num_shift(BcNum *n, size_t places)
|
|
{
|
|
if (places == 0 || n->len == 0) return BC_STATUS_SUCCESS;
|
|
|
|
// This check makes sense only if size_t is (much) larger than BC_MAX_NUM.
|
|
if (SIZE_MAX > (BC_MAX_NUM | 0xff)) {
|
|
if (places + n->len > BC_MAX_NUM)
|
|
return bc_error("number too long: must be [1,"BC_MAX_NUM_STR"]");
|
|
}
|
|
|
|
if (n->rdx >= places)
|
|
n->rdx -= places;
|
|
else {
|
|
bc_num_extend(n, places - n->rdx);
|
|
n->rdx = 0;
|
|
}
|
|
|
|
bc_num_clean(n);
|
|
|
|
return BC_STATUS_SUCCESS;
|
|
}
|
|
|
|
static BcStatus bc_num_inv(BcNum *a, BcNum *b, size_t scale)
|
|
{
|
|
BcNum one;
|
|
BcDig num[2];
|
|
|
|
one.cap = 2;
|
|
one.num = num;
|
|
bc_num_one(&one);
|
|
|
|
return bc_num_div(&one, a, b, scale);
|
|
}
|
|
|
|
static BcStatus bc_num_a(BcNum *a, BcNum *b, BcNum *restrict c, size_t sub)
|
|
{
|
|
BcDig *ptr, *ptr_a, *ptr_b, *ptr_c;
|
|
size_t i, max, min_rdx, min_int, diff, a_int, b_int;
|
|
int carry, in;
|
|
|
|
// Because this function doesn't need to use scale (per the bc spec),
|
|
// I am hijacking it to say whether it's doing an add or a subtract.
|
|
|
|
if (a->len == 0) {
|
|
bc_num_copy(c, b);
|
|
if (sub && c->len) c->neg = !c->neg;
|
|
return BC_STATUS_SUCCESS;
|
|
}
|
|
else if (b->len == 0) {
|
|
bc_num_copy(c, a);
|
|
return BC_STATUS_SUCCESS;
|
|
}
|
|
|
|
c->neg = a->neg;
|
|
c->rdx = BC_MAX(a->rdx, b->rdx);
|
|
min_rdx = BC_MIN(a->rdx, b->rdx);
|
|
c->len = 0;
|
|
|
|
if (a->rdx > b->rdx) {
|
|
diff = a->rdx - b->rdx;
|
|
ptr = a->num;
|
|
ptr_a = a->num + diff;
|
|
ptr_b = b->num;
|
|
}
|
|
else {
|
|
diff = b->rdx - a->rdx;
|
|
ptr = b->num;
|
|
ptr_a = a->num;
|
|
ptr_b = b->num + diff;
|
|
}
|
|
|
|
for (ptr_c = c->num, i = 0; i < diff; ++i, ++c->len) ptr_c[i] = ptr[i];
|
|
|
|
ptr_c += diff;
|
|
a_int = BC_NUM_INT(a);
|
|
b_int = BC_NUM_INT(b);
|
|
|
|
if (a_int > b_int) {
|
|
min_int = b_int;
|
|
max = a_int;
|
|
ptr = ptr_a;
|
|
}
|
|
else {
|
|
min_int = a_int;
|
|
max = b_int;
|
|
ptr = ptr_b;
|
|
}
|
|
|
|
for (carry = 0, i = 0; i < min_rdx + min_int; ++i, ++c->len) {
|
|
in = ((int) ptr_a[i]) + ((int) ptr_b[i]) + carry;
|
|
carry = in / 10;
|
|
ptr_c[i] = (BcDig)(in % 10);
|
|
}
|
|
|
|
for (; i < max + min_rdx; ++i, ++c->len) {
|
|
in = ((int) ptr[i]) + carry;
|
|
carry = in / 10;
|
|
ptr_c[i] = (BcDig)(in % 10);
|
|
}
|
|
|
|
if (carry != 0) c->num[c->len++] = (BcDig) carry;
|
|
|
|
return BC_STATUS_SUCCESS; // can't make void, see bc_num_binary()
|
|
}
|
|
|
|
static BcStatus bc_num_s(BcNum *a, BcNum *b, BcNum *restrict c, size_t sub)
|
|
{
|
|
ssize_t cmp;
|
|
BcNum *minuend, *subtrahend;
|
|
size_t start;
|
|
bool aneg, bneg, neg;
|
|
|
|
// Because this function doesn't need to use scale (per the bc spec),
|
|
// I am hijacking it to say whether it's doing an add or a subtract.
|
|
|
|
if (a->len == 0) {
|
|
bc_num_copy(c, b);
|
|
if (sub && c->len) c->neg = !c->neg;
|
|
return BC_STATUS_SUCCESS;
|
|
}
|
|
else if (b->len == 0) {
|
|
bc_num_copy(c, a);
|
|
return BC_STATUS_SUCCESS;
|
|
}
|
|
|
|
aneg = a->neg;
|
|
bneg = b->neg;
|
|
a->neg = b->neg = false;
|
|
|
|
cmp = bc_num_cmp(a, b);
|
|
|
|
a->neg = aneg;
|
|
b->neg = bneg;
|
|
|
|
if (cmp == 0) {
|
|
bc_num_setToZero(c, BC_MAX(a->rdx, b->rdx));
|
|
return BC_STATUS_SUCCESS;
|
|
}
|
|
else if (cmp > 0) {
|
|
neg = a->neg;
|
|
minuend = a;
|
|
subtrahend = b;
|
|
}
|
|
else {
|
|
neg = b->neg;
|
|
if (sub) neg = !neg;
|
|
minuend = b;
|
|
subtrahend = a;
|
|
}
|
|
|
|
bc_num_copy(c, minuend);
|
|
c->neg = neg;
|
|
|
|
if (c->rdx < subtrahend->rdx) {
|
|
bc_num_extend(c, subtrahend->rdx - c->rdx);
|
|
start = 0;
|
|
}
|
|
else
|
|
start = c->rdx - subtrahend->rdx;
|
|
|
|
bc_num_subArrays(c->num + start, subtrahend->num, subtrahend->len);
|
|
|
|
bc_num_clean(c);
|
|
|
|
return BC_STATUS_SUCCESS; // can't make void, see bc_num_binary()
|
|
}
|
|
|
|
static BcStatus bc_num_k(BcNum *restrict a, BcNum *restrict b,
|
|
BcNum *restrict c)
|
|
{
|
|
BcStatus s;
|
|
size_t max = BC_MAX(a->len, b->len), max2 = (max + 1) / 2;
|
|
BcNum l1, h1, l2, h2, m2, m1, z0, z1, z2, temp;
|
|
bool aone;
|
|
|
|
if (a->len == 0 || b->len == 0) {
|
|
bc_num_zero(c);
|
|
return BC_STATUS_SUCCESS;
|
|
}
|
|
aone = BC_NUM_ONE(a);
|
|
if (aone || BC_NUM_ONE(b)) {
|
|
bc_num_copy(c, aone ? b : a);
|
|
return BC_STATUS_SUCCESS;
|
|
}
|
|
|
|
if (a->len + b->len < BC_NUM_KARATSUBA_LEN ||
|
|
a->len < BC_NUM_KARATSUBA_LEN || b->len < BC_NUM_KARATSUBA_LEN)
|
|
{
|
|
size_t i, j, len;
|
|
unsigned carry;
|
|
|
|
bc_num_expand(c, a->len + b->len + 1);
|
|
|
|
memset(c->num, 0, sizeof(BcDig) * c->cap);
|
|
c->len = len = 0;
|
|
|
|
for (i = 0; i < b->len; ++i) {
|
|
|
|
carry = 0;
|
|
for (j = 0; j < a->len; ++j) {
|
|
unsigned in = c->num[i + j];
|
|
in += ((unsigned) a->num[j]) * ((unsigned) b->num[i]) + carry;
|
|
// note: compilers prefer _unsigned_ div/const
|
|
carry = in / 10;
|
|
c->num[i + j] = (BcDig)(in % 10);
|
|
}
|
|
|
|
c->num[i + j] += (BcDig) carry;
|
|
len = BC_MAX(len, i + j + !!carry);
|
|
|
|
// a=2^1000000
|
|
// a*a <- without check below, this will not be interruptible
|
|
if (G_interrupt) return BC_STATUS_FAILURE;
|
|
}
|
|
|
|
c->len = len;
|
|
|
|
return BC_STATUS_SUCCESS;
|
|
}
|
|
|
|
bc_num_init(&l1, max);
|
|
bc_num_init(&h1, max);
|
|
bc_num_init(&l2, max);
|
|
bc_num_init(&h2, max);
|
|
bc_num_init(&m1, max);
|
|
bc_num_init(&m2, max);
|
|
bc_num_init(&z0, max);
|
|
bc_num_init(&z1, max);
|
|
bc_num_init(&z2, max);
|
|
bc_num_init(&temp, max + max);
|
|
|
|
bc_num_split(a, max2, &l1, &h1);
|
|
bc_num_split(b, max2, &l2, &h2);
|
|
|
|
s = bc_num_add(&h1, &l1, &m1, 0);
|
|
if (s) goto err;
|
|
s = bc_num_add(&h2, &l2, &m2, 0);
|
|
if (s) goto err;
|
|
|
|
s = bc_num_k(&h1, &h2, &z0);
|
|
if (s) goto err;
|
|
s = bc_num_k(&m1, &m2, &z1);
|
|
if (s) goto err;
|
|
s = bc_num_k(&l1, &l2, &z2);
|
|
if (s) goto err;
|
|
|
|
s = bc_num_sub(&z1, &z0, &temp, 0);
|
|
if (s) goto err;
|
|
s = bc_num_sub(&temp, &z2, &z1, 0);
|
|
if (s) goto err;
|
|
|
|
s = bc_num_shift(&z0, max2 * 2);
|
|
if (s) goto err;
|
|
s = bc_num_shift(&z1, max2);
|
|
if (s) goto err;
|
|
s = bc_num_add(&z0, &z1, &temp, 0);
|
|
if (s) goto err;
|
|
s = bc_num_add(&temp, &z2, c, 0);
|
|
|
|
err:
|
|
bc_num_free(&temp);
|
|
bc_num_free(&z2);
|
|
bc_num_free(&z1);
|
|
bc_num_free(&z0);
|
|
bc_num_free(&m2);
|
|
bc_num_free(&m1);
|
|
bc_num_free(&h2);
|
|
bc_num_free(&l2);
|
|
bc_num_free(&h1);
|
|
bc_num_free(&l1);
|
|
return s;
|
|
}
|
|
|
|
static BcStatus bc_num_m(BcNum *a, BcNum *b, BcNum *restrict c, size_t scale)
|
|
{
|
|
BcStatus s;
|
|
BcNum cpa, cpb;
|
|
size_t maxrdx = BC_MAX(a->rdx, b->rdx);
|
|
|
|
scale = BC_MAX(scale, a->rdx);
|
|
scale = BC_MAX(scale, b->rdx);
|
|
scale = BC_MIN(a->rdx + b->rdx, scale);
|
|
maxrdx = BC_MAX(maxrdx, scale);
|
|
|
|
bc_num_init(&cpa, a->len);
|
|
bc_num_init(&cpb, b->len);
|
|
|
|
bc_num_copy(&cpa, a);
|
|
bc_num_copy(&cpb, b);
|
|
cpa.neg = cpb.neg = false;
|
|
|
|
s = bc_num_shift(&cpa, maxrdx);
|
|
if (s) goto err;
|
|
s = bc_num_shift(&cpb, maxrdx);
|
|
if (s) goto err;
|
|
s = bc_num_k(&cpa, &cpb, c);
|
|
if (s) goto err;
|
|
|
|
maxrdx += scale;
|
|
bc_num_expand(c, c->len + maxrdx);
|
|
|
|
if (c->len < maxrdx) {
|
|
memset(c->num + c->len, 0, (c->cap - c->len) * sizeof(BcDig));
|
|
c->len += maxrdx;
|
|
}
|
|
|
|
c->rdx = maxrdx;
|
|
bc_num_retireMul(c, scale, a->neg, b->neg);
|
|
|
|
err:
|
|
bc_num_free(&cpb);
|
|
bc_num_free(&cpa);
|
|
return s;
|
|
}
|
|
|
|
static BcStatus bc_num_d(BcNum *a, BcNum *b, BcNum *restrict c, size_t scale)
|
|
{
|
|
BcStatus s = BC_STATUS_SUCCESS;
|
|
BcDig *n, *p, q;
|
|
size_t len, end, i;
|
|
BcNum cp;
|
|
bool zero = true;
|
|
|
|
if (b->len == 0)
|
|
return bc_error("divide by zero");
|
|
else if (a->len == 0) {
|
|
bc_num_setToZero(c, scale);
|
|
return BC_STATUS_SUCCESS;
|
|
}
|
|
else if (BC_NUM_ONE(b)) {
|
|
bc_num_copy(c, a);
|
|
bc_num_retireMul(c, scale, a->neg, b->neg);
|
|
return BC_STATUS_SUCCESS;
|
|
}
|
|
|
|
bc_num_init(&cp, BC_NUM_MREQ(a, b, scale));
|
|
bc_num_copy(&cp, a);
|
|
len = b->len;
|
|
|
|
if (len > cp.len) {
|
|
bc_num_expand(&cp, len + 2);
|
|
bc_num_extend(&cp, len - cp.len);
|
|
}
|
|
|
|
if (b->rdx > cp.rdx) bc_num_extend(&cp, b->rdx - cp.rdx);
|
|
cp.rdx -= b->rdx;
|
|
if (scale > cp.rdx) bc_num_extend(&cp, scale - cp.rdx);
|
|
|
|
if (b->rdx == b->len) {
|
|
for (i = 0; zero && i < len; ++i) zero = !b->num[len - i - 1];
|
|
len -= i - 1;
|
|
}
|
|
|
|
if (cp.cap == cp.len) bc_num_expand(&cp, cp.len + 1);
|
|
|
|
// We want an extra zero in front to make things simpler.
|
|
cp.num[cp.len++] = 0;
|
|
end = cp.len - len;
|
|
|
|
bc_num_expand(c, cp.len);
|
|
|
|
bc_num_zero(c);
|
|
memset(c->num + end, 0, (c->cap - end) * sizeof(BcDig));
|
|
c->rdx = cp.rdx;
|
|
c->len = cp.len;
|
|
p = b->num;
|
|
|
|
for (i = end - 1; !s && i < end; --i) {
|
|
n = cp.num + i;
|
|
for (q = 0; (!s && n[len] != 0) || bc_num_compare(n, p, len) >= 0; ++q)
|
|
bc_num_subArrays(n, p, len);
|
|
c->num[i] = q;
|
|
// a=2^100000
|
|
// scale=40000
|
|
// 1/a <- without check below, this will not be interruptible
|
|
if (G_interrupt) {
|
|
s = BC_STATUS_FAILURE;
|
|
break;
|
|
}
|
|
}
|
|
|
|
bc_num_retireMul(c, scale, a->neg, b->neg);
|
|
bc_num_free(&cp);
|
|
|
|
return s;
|
|
}
|
|
|
|
static BcStatus bc_num_r(BcNum *a, BcNum *b, BcNum *restrict c,
|
|
BcNum *restrict d, size_t scale, size_t ts)
|
|
{
|
|
BcStatus s;
|
|
BcNum temp;
|
|
bool neg;
|
|
|
|
if (b->len == 0)
|
|
return bc_error("divide by zero");
|
|
|
|
if (a->len == 0) {
|
|
bc_num_setToZero(d, ts);
|
|
return BC_STATUS_SUCCESS;
|
|
}
|
|
|
|
bc_num_init(&temp, d->cap);
|
|
s = bc_num_d(a, b, c, scale);
|
|
if (s) goto err;
|
|
|
|
if (scale != 0) scale = ts;
|
|
|
|
s = bc_num_m(c, b, &temp, scale);
|
|
if (s) goto err;
|
|
s = bc_num_sub(a, &temp, d, scale);
|
|
if (s) goto err;
|
|
|
|
if (ts > d->rdx && d->len) bc_num_extend(d, ts - d->rdx);
|
|
|
|
neg = d->neg;
|
|
bc_num_retireMul(d, ts, a->neg, b->neg);
|
|
d->neg = neg;
|
|
|
|
err:
|
|
bc_num_free(&temp);
|
|
return s;
|
|
}
|
|
|
|
static BcStatus bc_num_rem(BcNum *a, BcNum *b, BcNum *restrict c, size_t scale)
|
|
{
|
|
BcStatus s;
|
|
BcNum c1;
|
|
size_t ts = BC_MAX(scale + b->rdx, a->rdx), len = BC_NUM_MREQ(a, b, ts);
|
|
|
|
bc_num_init(&c1, len);
|
|
s = bc_num_r(a, b, &c1, c, scale, ts);
|
|
bc_num_free(&c1);
|
|
|
|
return s;
|
|
}
|
|
|
|
static BcStatus bc_num_p(BcNum *a, BcNum *b, BcNum *restrict c, size_t scale)
|
|
{
|
|
BcStatus s = BC_STATUS_SUCCESS;
|
|
BcNum copy;
|
|
unsigned long pow;
|
|
size_t i, powrdx, resrdx;
|
|
bool neg, zero;
|
|
|
|
if (b->rdx) return bc_error("non integer number");
|
|
|
|
if (b->len == 0) {
|
|
bc_num_one(c);
|
|
return BC_STATUS_SUCCESS;
|
|
}
|
|
else if (a->len == 0) {
|
|
bc_num_setToZero(c, scale);
|
|
return BC_STATUS_SUCCESS;
|
|
}
|
|
else if (BC_NUM_ONE(b)) {
|
|
if (!b->neg)
|
|
bc_num_copy(c, a);
|
|
else
|
|
s = bc_num_inv(a, c, scale);
|
|
return s;
|
|
}
|
|
|
|
neg = b->neg;
|
|
b->neg = false;
|
|
|
|
s = bc_num_ulong(b, &pow);
|
|
if (s) return s;
|
|
|
|
bc_num_init(©, a->len);
|
|
bc_num_copy(©, a);
|
|
|
|
if (!neg) {
|
|
if (a->rdx > scale)
|
|
scale = a->rdx;
|
|
if (a->rdx * pow < scale)
|
|
scale = a->rdx * pow;
|
|
}
|
|
|
|
b->neg = neg;
|
|
|
|
for (powrdx = a->rdx; !(pow & 1); pow >>= 1) {
|
|
powrdx <<= 1;
|
|
s = bc_num_mul(©, ©, ©, powrdx);
|
|
if (s) goto err;
|
|
// Not needed: bc_num_mul() has a check for ^C:
|
|
//if (G_interrupt) {
|
|
// s = BC_STATUS_FAILURE;
|
|
// goto err;
|
|
//}
|
|
}
|
|
|
|
bc_num_copy(c, ©);
|
|
|
|
for (resrdx = powrdx, pow >>= 1; pow != 0; pow >>= 1) {
|
|
|
|
powrdx <<= 1;
|
|
s = bc_num_mul(©, ©, ©, powrdx);
|
|
if (s) goto err;
|
|
|
|
if (pow & 1) {
|
|
resrdx += powrdx;
|
|
s = bc_num_mul(c, ©, c, resrdx);
|
|
if (s) goto err;
|
|
}
|
|
// Not needed: bc_num_mul() has a check for ^C:
|
|
//if (G_interrupt) {
|
|
// s = BC_STATUS_FAILURE;
|
|
// goto err;
|
|
//}
|
|
}
|
|
|
|
if (neg) {
|
|
s = bc_num_inv(c, c, scale);
|
|
if (s) goto err;
|
|
}
|
|
|
|
if (c->rdx > scale) bc_num_truncate(c, c->rdx - scale);
|
|
|
|
// We can't use bc_num_clean() here.
|
|
for (zero = true, i = 0; zero && i < c->len; ++i) zero = !c->num[i];
|
|
if (zero) bc_num_setToZero(c, scale);
|
|
|
|
err:
|
|
bc_num_free(©);
|
|
return s;
|
|
}
|
|
|
|
static BcStatus bc_num_binary(BcNum *a, BcNum *b, BcNum *c, size_t scale,
|
|
BcNumBinaryOp op, size_t req)
|
|
{
|
|
BcStatus s;
|
|
BcNum num2, *ptr_a, *ptr_b;
|
|
bool init = false;
|
|
|
|
if (c == a) {
|
|
ptr_a = &num2;
|
|
memcpy(ptr_a, c, sizeof(BcNum));
|
|
init = true;
|
|
}
|
|
else
|
|
ptr_a = a;
|
|
|
|
if (c == b) {
|
|
ptr_b = &num2;
|
|
if (c != a) {
|
|
memcpy(ptr_b, c, sizeof(BcNum));
|
|
init = true;
|
|
}
|
|
}
|
|
else
|
|
ptr_b = b;
|
|
|
|
if (init)
|
|
bc_num_init(c, req);
|
|
else
|
|
bc_num_expand(c, req);
|
|
|
|
s = op(ptr_a, ptr_b, c, scale);
|
|
|
|
if (init) bc_num_free(&num2);
|
|
|
|
return s;
|
|
}
|
|
|
|
static bool bc_num_strValid(const char *val, size_t base)
|
|
{
|
|
BcDig b;
|
|
bool small, radix = false;
|
|
size_t i, len = strlen(val);
|
|
|
|
if (!len) return true;
|
|
|
|
small = base <= 10;
|
|
b = (BcDig)(small ? base + '0' : base - 10 + 'A');
|
|
|
|
for (i = 0; i < len; ++i) {
|
|
|
|
BcDig c = val[i];
|
|
|
|
if (c == '.') {
|
|
|
|
if (radix) return false;
|
|
|
|
radix = true;
|
|
continue;
|
|
}
|
|
|
|
if (c < '0' || (small && c >= b) || (c > '9' && (c < 'A' || c >= b)))
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
static void bc_num_parseDecimal(BcNum *n, const char *val)
|
|
{
|
|
size_t len, i;
|
|
const char *ptr;
|
|
bool zero = true;
|
|
|
|
for (i = 0; val[i] == '0'; ++i);
|
|
|
|
val += i;
|
|
len = strlen(val);
|
|
bc_num_zero(n);
|
|
|
|
if (len != 0) {
|
|
for (i = 0; zero && i < len; ++i) zero = val[i] == '0' || val[i] == '.';
|
|
bc_num_expand(n, len);
|
|
}
|
|
|
|
ptr = strchr(val, '.');
|
|
|
|
n->rdx = 0;
|
|
if (ptr != NULL)
|
|
n->rdx = (size_t)((val + len) - (ptr + 1));
|
|
|
|
if (!zero) {
|
|
for (i = len - 1; i < len; ++n->len, i -= 1 + (i && val[i - 1] == '.'))
|
|
n->num[n->len] = val[i] - '0';
|
|
}
|
|
}
|
|
|
|
static void bc_num_parseBase(BcNum *n, const char *val, BcNum *base)
|
|
{
|
|
BcStatus s;
|
|
BcNum temp, mult, result;
|
|
BcDig c = '\0';
|
|
bool zero = true;
|
|
unsigned long v;
|
|
size_t i, digits, len = strlen(val);
|
|
|
|
bc_num_zero(n);
|
|
|
|
for (i = 0; zero && i < len; ++i) zero = (val[i] == '.' || val[i] == '0');
|
|
if (zero) return;
|
|
|
|
bc_num_init(&temp, BC_NUM_DEF_SIZE);
|
|
bc_num_init(&mult, BC_NUM_DEF_SIZE);
|
|
|
|
for (i = 0; i < len; ++i) {
|
|
|
|
c = val[i];
|
|
if (c == '.') break;
|
|
|
|
v = (unsigned long) (c <= '9' ? c - '0' : c - 'A' + 10);
|
|
|
|
s = bc_num_mul(n, base, &mult, 0);
|
|
if (s) goto int_err;
|
|
bc_num_ulong2num(&temp, v);
|
|
s = bc_num_add(&mult, &temp, n, 0);
|
|
if (s) goto int_err;
|
|
}
|
|
|
|
if (i == len) {
|
|
c = val[i];
|
|
if (c == 0) goto int_err;
|
|
}
|
|
|
|
bc_num_init(&result, base->len);
|
|
bc_num_zero(&result);
|
|
bc_num_one(&mult);
|
|
|
|
for (i += 1, digits = 0; i < len; ++i, ++digits) {
|
|
|
|
c = val[i];
|
|
if (c == 0) break;
|
|
|
|
v = (unsigned long) (c <= '9' ? c - '0' : c - 'A' + 10);
|
|
|
|
s = bc_num_mul(&result, base, &result, 0);
|
|
if (s) goto err;
|
|
bc_num_ulong2num(&temp, v);
|
|
s = bc_num_add(&result, &temp, &result, 0);
|
|
if (s) goto err;
|
|
s = bc_num_mul(&mult, base, &mult, 0);
|
|
if (s) goto err;
|
|
}
|
|
|
|
s = bc_num_div(&result, &mult, &result, digits);
|
|
if (s) goto err;
|
|
s = bc_num_add(n, &result, n, digits);
|
|
if (s) goto err;
|
|
|
|
if (n->len != 0) {
|
|
if (n->rdx < digits) bc_num_extend(n, digits - n->rdx);
|
|
}
|
|
else
|
|
bc_num_zero(n);
|
|
|
|
err:
|
|
bc_num_free(&result);
|
|
int_err:
|
|
bc_num_free(&mult);
|
|
bc_num_free(&temp);
|
|
}
|
|
|
|
static void bc_num_printNewline(size_t *nchars, size_t line_len)
|
|
{
|
|
if (*nchars == line_len - 1) {
|
|
bb_putchar('\\');
|
|
bb_putchar('\n');
|
|
*nchars = 0;
|
|
}
|
|
}
|
|
|
|
#if ENABLE_DC
|
|
static void bc_num_printChar(size_t num, size_t width, bool radix,
|
|
size_t *nchars, size_t line_len)
|
|
{
|
|
(void) radix, (void) line_len;
|
|
bb_putchar((char) num);
|
|
*nchars = *nchars + width;
|
|
}
|
|
#endif
|
|
|
|
static void bc_num_printDigits(size_t num, size_t width, bool radix,
|
|
size_t *nchars, size_t line_len)
|
|
{
|
|
size_t exp, pow;
|
|
|
|
bc_num_printNewline(nchars, line_len);
|
|
bb_putchar(radix ? '.' : ' ');
|
|
++(*nchars);
|
|
|
|
bc_num_printNewline(nchars, line_len);
|
|
for (exp = 0, pow = 1; exp < width - 1; ++exp, pow *= 10)
|
|
continue;
|
|
|
|
for (exp = 0; exp < width; pow /= 10, ++(*nchars), ++exp) {
|
|
size_t dig;
|
|
bc_num_printNewline(nchars, line_len);
|
|
dig = num / pow;
|
|
num -= dig * pow;
|
|
bb_putchar(((char) dig) + '0');
|
|
}
|
|
}
|
|
|
|
static void bc_num_printHex(size_t num, size_t width, bool radix,
|
|
size_t *nchars, size_t line_len)
|
|
{
|
|
if (radix) {
|
|
bc_num_printNewline(nchars, line_len);
|
|
bb_putchar('.');
|
|
*nchars += 1;
|
|
}
|
|
|
|
bc_num_printNewline(nchars, line_len);
|
|
bb_putchar(bb_hexdigits_upcase[num]);
|
|
*nchars = *nchars + width;
|
|
}
|
|
|
|
static void bc_num_printDecimal(BcNum *n, size_t *nchars, size_t len)
|
|
{
|
|
size_t i, rdx = n->rdx - 1;
|
|
|
|
if (n->neg) bb_putchar('-');
|
|
(*nchars) += n->neg;
|
|
|
|
for (i = n->len - 1; i < n->len; --i)
|
|
bc_num_printHex((size_t) n->num[i], 1, i == rdx, nchars, len);
|
|
}
|
|
|
|
static BcStatus bc_num_printNum(BcNum *n, BcNum *base, size_t width,
|
|
size_t *nchars, size_t len, BcNumDigitOp print)
|
|
{
|
|
BcStatus s;
|
|
BcVec stack;
|
|
BcNum intp, fracp, digit, frac_len;
|
|
unsigned long dig, *ptr;
|
|
size_t i;
|
|
bool radix;
|
|
|
|
if (n->len == 0) {
|
|
print(0, width, false, nchars, len);
|
|
return BC_STATUS_SUCCESS;
|
|
}
|
|
|
|
bc_vec_init(&stack, sizeof(long), NULL);
|
|
bc_num_init(&intp, n->len);
|
|
bc_num_init(&fracp, n->rdx);
|
|
bc_num_init(&digit, width);
|
|
bc_num_init(&frac_len, BC_NUM_INT(n));
|
|
bc_num_copy(&intp, n);
|
|
bc_num_one(&frac_len);
|
|
|
|
bc_num_truncate(&intp, intp.rdx);
|
|
s = bc_num_sub(n, &intp, &fracp, 0);
|
|
if (s) goto err;
|
|
|
|
while (intp.len != 0) {
|
|
s = bc_num_divmod(&intp, base, &intp, &digit, 0);
|
|
if (s) goto err;
|
|
s = bc_num_ulong(&digit, &dig);
|
|
if (s) goto err;
|
|
bc_vec_push(&stack, &dig);
|
|
}
|
|
|
|
for (i = 0; i < stack.len; ++i) {
|
|
ptr = bc_vec_item_rev(&stack, i);
|
|
print(*ptr, width, false, nchars, len);
|
|
}
|
|
|
|
if (!n->rdx) goto err;
|
|
|
|
for (radix = true; frac_len.len <= n->rdx; radix = false) {
|
|
s = bc_num_mul(&fracp, base, &fracp, n->rdx);
|
|
if (s) goto err;
|
|
s = bc_num_ulong(&fracp, &dig);
|
|
if (s) goto err;
|
|
bc_num_ulong2num(&intp, dig);
|
|
s = bc_num_sub(&fracp, &intp, &fracp, 0);
|
|
if (s) goto err;
|
|
print(dig, width, radix, nchars, len);
|
|
s = bc_num_mul(&frac_len, base, &frac_len, 0);
|
|
if (s) goto err;
|
|
}
|
|
|
|
err:
|
|
bc_num_free(&frac_len);
|
|
bc_num_free(&digit);
|
|
bc_num_free(&fracp);
|
|
bc_num_free(&intp);
|
|
bc_vec_free(&stack);
|
|
return s;
|
|
}
|
|
|
|
static BcStatus bc_num_printBase(BcNum *n, BcNum *base, size_t base_t,
|
|
size_t *nchars, size_t line_len)
|
|
{
|
|
BcStatus s;
|
|
size_t width, i;
|
|
BcNumDigitOp print;
|
|
bool neg = n->neg;
|
|
|
|
if (neg) bb_putchar('-');
|
|
(*nchars) += neg;
|
|
|
|
n->neg = false;
|
|
|
|
if (base_t <= BC_NUM_MAX_IBASE) {
|
|
width = 1;
|
|
print = bc_num_printHex;
|
|
}
|
|
else {
|
|
for (i = base_t - 1, width = 0; i != 0; i /= 10, ++width);
|
|
print = bc_num_printDigits;
|
|
}
|
|
|
|
s = bc_num_printNum(n, base, width, nchars, line_len, print);
|
|
n->neg = neg;
|
|
|
|
return s;
|
|
}
|
|
|
|
#if ENABLE_DC
|
|
static BcStatus bc_num_stream(BcNum *n, BcNum *base, size_t *nchars, size_t len)
|
|
{
|
|
return bc_num_printNum(n, base, 1, nchars, len, bc_num_printChar);
|
|
}
|
|
#endif
|
|
|
|
static BcStatus bc_num_parse(BcNum *n, const char *val, BcNum *base,
|
|
size_t base_t)
|
|
{
|
|
if (!bc_num_strValid(val, base_t))
|
|
return bc_error("bad number string");
|
|
|
|
if (base_t == 10)
|
|
bc_num_parseDecimal(n, val);
|
|
else
|
|
bc_num_parseBase(n, val, base);
|
|
|
|
return BC_STATUS_SUCCESS;
|
|
}
|
|
|
|
static BcStatus bc_num_print(BcNum *n, BcNum *base, size_t base_t, bool newline,
|
|
size_t *nchars, size_t line_len)
|
|
{
|
|
BcStatus s = BC_STATUS_SUCCESS;
|
|
|
|
bc_num_printNewline(nchars, line_len);
|
|
|
|
if (n->len == 0) {
|
|
bb_putchar('0');
|
|
++(*nchars);
|
|
}
|
|
else if (base_t == 10)
|
|
bc_num_printDecimal(n, nchars, line_len);
|
|
else
|
|
s = bc_num_printBase(n, base, base_t, nchars, line_len);
|
|
|
|
if (newline) {
|
|
bb_putchar('\n');
|
|
*nchars = 0;
|
|
}
|
|
|
|
return s;
|
|
}
|
|
|
|
static BcStatus bc_num_add(BcNum *a, BcNum *b, BcNum *c, size_t scale)
|
|
{
|
|
BcNumBinaryOp op = (!a->neg == !b->neg) ? bc_num_a : bc_num_s;
|
|
(void) scale;
|
|
return bc_num_binary(a, b, c, false, op, BC_NUM_AREQ(a, b));
|
|
}
|
|
|
|
static BcStatus bc_num_sub(BcNum *a, BcNum *b, BcNum *c, size_t scale)
|
|
{
|
|
BcNumBinaryOp op = (!a->neg == !b->neg) ? bc_num_s : bc_num_a;
|
|
(void) scale;
|
|
return bc_num_binary(a, b, c, true, op, BC_NUM_AREQ(a, b));
|
|
}
|
|
|
|
static BcStatus bc_num_mul(BcNum *a, BcNum *b, BcNum *c, size_t scale)
|
|
{
|
|
size_t req = BC_NUM_MREQ(a, b, scale);
|
|
return bc_num_binary(a, b, c, scale, bc_num_m, req);
|
|
}
|
|
|
|
static BcStatus bc_num_div(BcNum *a, BcNum *b, BcNum *c, size_t scale)
|
|
{
|
|
size_t req = BC_NUM_MREQ(a, b, scale);
|
|
return bc_num_binary(a, b, c, scale, bc_num_d, req);
|
|
}
|
|
|
|
static BcStatus bc_num_mod(BcNum *a, BcNum *b, BcNum *c, size_t scale)
|
|
{
|
|
size_t req = BC_NUM_MREQ(a, b, scale);
|
|
return bc_num_binary(a, b, c, scale, bc_num_rem, req);
|
|
}
|
|
|
|
static BcStatus bc_num_pow(BcNum *a, BcNum *b, BcNum *c, size_t scale)
|
|
{
|
|
return bc_num_binary(a, b, c, scale, bc_num_p, a->len * b->len + 1);
|
|
}
|
|
|
|
static BcStatus bc_num_sqrt(BcNum *a, BcNum *restrict b, size_t scale)
|
|
{
|
|
BcStatus s;
|
|
BcNum num1, num2, half, f, fprime, *x0, *x1, *temp;
|
|
size_t pow, len, digs, digs1, resrdx, req, times = 0;
|
|
ssize_t cmp = 1, cmp1 = SSIZE_MAX, cmp2 = SSIZE_MAX;
|
|
|
|
req = BC_MAX(scale, a->rdx) + ((BC_NUM_INT(a) + 1) >> 1) + 1;
|
|
bc_num_expand(b, req);
|
|
|
|
if (a->len == 0) {
|
|
bc_num_setToZero(b, scale);
|
|
return BC_STATUS_SUCCESS;
|
|
}
|
|
else if (a->neg)
|
|
return bc_error("negative number");
|
|
else if (BC_NUM_ONE(a)) {
|
|
bc_num_one(b);
|
|
bc_num_extend(b, scale);
|
|
return BC_STATUS_SUCCESS;
|
|
}
|
|
|
|
scale = BC_MAX(scale, a->rdx) + 1;
|
|
len = a->len + scale;
|
|
|
|
bc_num_init(&num1, len);
|
|
bc_num_init(&num2, len);
|
|
bc_num_init(&half, BC_NUM_DEF_SIZE);
|
|
|
|
bc_num_one(&half);
|
|
half.num[0] = 5;
|
|
half.rdx = 1;
|
|
|
|
bc_num_init(&f, len);
|
|
bc_num_init(&fprime, len);
|
|
|
|
x0 = &num1;
|
|
x1 = &num2;
|
|
|
|
bc_num_one(x0);
|
|
pow = BC_NUM_INT(a);
|
|
|
|
if (pow) {
|
|
|
|
if (pow & 1)
|
|
x0->num[0] = 2;
|
|
else
|
|
x0->num[0] = 6;
|
|
|
|
pow -= 2 - (pow & 1);
|
|
|
|
bc_num_extend(x0, pow);
|
|
|
|
// Make sure to move the radix back.
|
|
x0->rdx -= pow;
|
|
}
|
|
|
|
x0->rdx = digs = digs1 = 0;
|
|
resrdx = scale + 2;
|
|
len = BC_NUM_INT(x0) + resrdx - 1;
|
|
|
|
while (cmp != 0 || digs < len) {
|
|
|
|
s = bc_num_div(a, x0, &f, resrdx);
|
|
if (s) goto err;
|
|
s = bc_num_add(x0, &f, &fprime, resrdx);
|
|
if (s) goto err;
|
|
s = bc_num_mul(&fprime, &half, x1, resrdx);
|
|
if (s) goto err;
|
|
|
|
cmp = bc_num_cmp(x1, x0);
|
|
digs = x1->len - (unsigned long long) llabs(cmp);
|
|
|
|
if (cmp == cmp2 && digs == digs1)
|
|
times += 1;
|
|
else
|
|
times = 0;
|
|
|
|
resrdx += times > 4;
|
|
|
|
cmp2 = cmp1;
|
|
cmp1 = cmp;
|
|
digs1 = digs;
|
|
|
|
temp = x0;
|
|
x0 = x1;
|
|
x1 = temp;
|
|
}
|
|
|
|
bc_num_copy(b, x0);
|
|
scale -= 1;
|
|
if (b->rdx > scale) bc_num_truncate(b, b->rdx - scale);
|
|
|
|
err:
|
|
bc_num_free(&fprime);
|
|
bc_num_free(&f);
|
|
bc_num_free(&half);
|
|
bc_num_free(&num2);
|
|
bc_num_free(&num1);
|
|
return s;
|
|
}
|
|
|
|
static BcStatus bc_num_divmod(BcNum *a, BcNum *b, BcNum *c, BcNum *d,
|
|
size_t scale)
|
|
{
|
|
BcStatus s;
|
|
BcNum num2, *ptr_a;
|
|
bool init = false;
|
|
size_t ts = BC_MAX(scale + b->rdx, a->rdx), len = BC_NUM_MREQ(a, b, ts);
|
|
|
|
if (c == a) {
|
|
memcpy(&num2, c, sizeof(BcNum));
|
|
ptr_a = &num2;
|
|
bc_num_init(c, len);
|
|
init = true;
|
|
}
|
|
else {
|
|
ptr_a = a;
|
|
bc_num_expand(c, len);
|
|
}
|
|
|
|
s = bc_num_r(ptr_a, b, c, d, scale, ts);
|
|
|
|
if (init) bc_num_free(&num2);
|
|
|
|
return s;
|
|
}
|
|
|
|
#if ENABLE_DC
|
|
static BcStatus bc_num_modexp(BcNum *a, BcNum *b, BcNum *c, BcNum *restrict d)
|
|
{
|
|
BcStatus s;
|
|
BcNum base, exp, two, temp;
|
|
|
|
if (c->len == 0)
|
|
return bc_error("divide by zero");
|
|
if (a->rdx || b->rdx || c->rdx)
|
|
return bc_error("non integer number");
|
|
if (b->neg)
|
|
return bc_error("negative number");
|
|
|
|
bc_num_expand(d, c->len);
|
|
bc_num_init(&base, c->len);
|
|
bc_num_init(&exp, b->len);
|
|
bc_num_init(&two, BC_NUM_DEF_SIZE);
|
|
bc_num_init(&temp, b->len);
|
|
|
|
bc_num_one(&two);
|
|
two.num[0] = 2;
|
|
bc_num_one(d);
|
|
|
|
s = bc_num_rem(a, c, &base, 0);
|
|
if (s) goto err;
|
|
bc_num_copy(&exp, b);
|
|
|
|
while (exp.len != 0) {
|
|
|
|
s = bc_num_divmod(&exp, &two, &exp, &temp, 0);
|
|
if (s) goto err;
|
|
|
|
if (BC_NUM_ONE(&temp)) {
|
|
s = bc_num_mul(d, &base, &temp, 0);
|
|
if (s) goto err;
|
|
s = bc_num_rem(&temp, c, d, 0);
|
|
if (s) goto err;
|
|
}
|
|
|
|
s = bc_num_mul(&base, &base, &temp, 0);
|
|
if (s) goto err;
|
|
s = bc_num_rem(&temp, c, &base, 0);
|
|
if (s) goto err;
|
|
}
|
|
|
|
err:
|
|
bc_num_free(&temp);
|
|
bc_num_free(&two);
|
|
bc_num_free(&exp);
|
|
bc_num_free(&base);
|
|
return s;
|
|
}
|
|
#endif // ENABLE_DC
|
|
|
|
#if ENABLE_BC
|
|
static BcStatus bc_func_insert(BcFunc *f, char *name, bool var)
|
|
{
|
|
BcId a;
|
|
size_t i;
|
|
|
|
for (i = 0; i < f->autos.len; ++i) {
|
|
if (strcmp(name, ((BcId *) bc_vec_item(&f->autos, i))->name) == 0)
|
|
return bc_error("function parameter or auto var has the same name as another");
|
|
}
|
|
|
|
a.idx = var;
|
|
a.name = name;
|
|
|
|
bc_vec_push(&f->autos, &a);
|
|
|
|
return BC_STATUS_SUCCESS;
|
|
}
|
|
#endif
|
|
|
|
static void bc_func_init(BcFunc *f)
|
|
{
|
|
bc_char_vec_init(&f->code);
|
|
bc_vec_init(&f->autos, sizeof(BcId), bc_id_free);
|
|
bc_vec_init(&f->labels, sizeof(size_t), NULL);
|
|
f->nparams = 0;
|
|
}
|
|
|
|
static void bc_func_free(void *func)
|
|
{
|
|
BcFunc *f = (BcFunc *) func;
|
|
bc_vec_free(&f->code);
|
|
bc_vec_free(&f->autos);
|
|
bc_vec_free(&f->labels);
|
|
}
|
|
|
|
static void bc_array_expand(BcVec *a, size_t len);
|
|
|
|
static void bc_array_init(BcVec *a, bool nums)
|
|
{
|
|
if (nums)
|
|
bc_vec_init(a, sizeof(BcNum), bc_num_free);
|
|
else
|
|
bc_vec_init(a, sizeof(BcVec), bc_vec_free);
|
|
bc_array_expand(a, 1);
|
|
}
|
|
|
|
static void bc_array_expand(BcVec *a, size_t len)
|
|
{
|
|
BcResultData data;
|
|
|
|
if (a->size == sizeof(BcNum) && a->dtor == bc_num_free) {
|
|
while (len > a->len) {
|
|
bc_num_init(&data.n, BC_NUM_DEF_SIZE);
|
|
bc_vec_push(a, &data.n);
|
|
}
|
|
}
|
|
else {
|
|
while (len > a->len) {
|
|
bc_array_init(&data.v, true);
|
|
bc_vec_push(a, &data.v);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void bc_array_copy(BcVec *d, const BcVec *s)
|
|
{
|
|
size_t i;
|
|
|
|
bc_vec_pop_all(d);
|
|
bc_vec_expand(d, s->cap);
|
|
d->len = s->len;
|
|
|
|
for (i = 0; i < s->len; ++i) {
|
|
BcNum *dnum = bc_vec_item(d, i), *snum = bc_vec_item(s, i);
|
|
bc_num_init(dnum, snum->len);
|
|
bc_num_copy(dnum, snum);
|
|
}
|
|
}
|
|
|
|
static void bc_string_free(void *string)
|
|
{
|
|
free(*((char **) string));
|
|
}
|
|
|
|
#if ENABLE_DC
|
|
static void bc_result_copy(BcResult *d, BcResult *src)
|
|
{
|
|
d->t = src->t;
|
|
|
|
switch (d->t) {
|
|
|
|
case BC_RESULT_TEMP:
|
|
case BC_RESULT_IBASE:
|
|
case BC_RESULT_SCALE:
|
|
case BC_RESULT_OBASE:
|
|
{
|
|
bc_num_init(&d->d.n, src->d.n.len);
|
|
bc_num_copy(&d->d.n, &src->d.n);
|
|
break;
|
|
}
|
|
|
|
case BC_RESULT_VAR:
|
|
case BC_RESULT_ARRAY:
|
|
case BC_RESULT_ARRAY_ELEM:
|
|
{
|
|
d->d.id.name = xstrdup(src->d.id.name);
|
|
break;
|
|
}
|
|
|
|
case BC_RESULT_CONSTANT:
|
|
case BC_RESULT_LAST:
|
|
case BC_RESULT_ONE:
|
|
case BC_RESULT_STR:
|
|
{
|
|
memcpy(&d->d.n, &src->d.n, sizeof(BcNum));
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
#endif // ENABLE_DC
|
|
|
|
static void bc_result_free(void *result)
|
|
{
|
|
BcResult *r = (BcResult *) result;
|
|
|
|
switch (r->t) {
|
|
|
|
case BC_RESULT_TEMP:
|
|
case BC_RESULT_IBASE:
|
|
case BC_RESULT_SCALE:
|
|
case BC_RESULT_OBASE:
|
|
{
|
|
bc_num_free(&r->d.n);
|
|
break;
|
|
}
|
|
|
|
case BC_RESULT_VAR:
|
|
case BC_RESULT_ARRAY:
|
|
case BC_RESULT_ARRAY_ELEM:
|
|
{
|
|
free(r->d.id.name);
|
|
break;
|
|
}
|
|
|
|
default:
|
|
{
|
|
// Do nothing.
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void bc_lex_lineComment(BcLex *l)
|
|
{
|
|
l->t.t = BC_LEX_WHITESPACE;
|
|
while (l->i < l->len && l->buf[l->i++] != '\n');
|
|
--l->i;
|
|
}
|
|
|
|
static void bc_lex_whitespace(BcLex *l)
|
|
{
|
|
char c;
|
|
l->t.t = BC_LEX_WHITESPACE;
|
|
for (c = l->buf[l->i]; c != '\n' && isspace(c); c = l->buf[++l->i]);
|
|
}
|
|
|
|
static BcStatus bc_lex_number(BcLex *l, char start)
|
|
{
|
|
const char *buf = l->buf + l->i;
|
|
size_t len, hits = 0, bslashes = 0, i = 0, j;
|
|
char c = buf[i];
|
|
bool last_pt, pt = start == '.';
|
|
|
|
last_pt = pt;
|
|
l->t.t = BC_LEX_NUMBER;
|
|
|
|
while (c != 0 && (isdigit(c) || (c >= 'A' && c <= 'F') ||
|
|
(c == '.' && !pt) || (c == '\\' && buf[i + 1] == '\n')))
|
|
{
|
|
if (c != '\\') {
|
|
last_pt = c == '.';
|
|
pt = pt || last_pt;
|
|
}
|
|
else {
|
|
++i;
|
|
bslashes += 1;
|
|
}
|
|
|
|
c = buf[++i];
|
|
}
|
|
|
|
len = i + !last_pt - bslashes * 2;
|
|
// This check makes sense only if size_t is (much) larger than BC_MAX_NUM.
|
|
if (SIZE_MAX > (BC_MAX_NUM | 0xff)) {
|
|
if (len > BC_MAX_NUM)
|
|
return bc_error("number too long: must be [1,"BC_MAX_NUM_STR"]");
|
|
}
|
|
|
|
bc_vec_pop_all(&l->t.v);
|
|
bc_vec_expand(&l->t.v, len + 1);
|
|
bc_vec_push(&l->t.v, &start);
|
|
|
|
for (buf -= 1, j = 1; j < len + hits * 2; ++j) {
|
|
|
|
c = buf[j];
|
|
|
|
// If we have hit a backslash, skip it. We don't have
|
|
// to check for a newline because it's guaranteed.
|
|
if (hits < bslashes && c == '\\') {
|
|
++hits;
|
|
++j;
|
|
continue;
|
|
}
|
|
|
|
bc_vec_push(&l->t.v, &c);
|
|
}
|
|
|
|
bc_vec_pushZeroByte(&l->t.v);
|
|
l->i += i;
|
|
|
|
return BC_STATUS_SUCCESS;
|
|
}
|
|
|
|
static BcStatus bc_lex_name(BcLex *l)
|
|
{
|
|
size_t i = 0;
|
|
const char *buf = l->buf + l->i - 1;
|
|
char c = buf[i];
|
|
|
|
l->t.t = BC_LEX_NAME;
|
|
|
|
while ((c >= 'a' && c <= 'z') || isdigit(c) || c == '_') c = buf[++i];
|
|
|
|
// This check makes sense only if size_t is (much) larger than BC_MAX_STRING.
|
|
if (SIZE_MAX > (BC_MAX_STRING | 0xff)) {
|
|
if (i > BC_MAX_STRING)
|
|
return bc_error("name too long: must be [1,"BC_MAX_STRING_STR"]");
|
|
}
|
|
bc_vec_string(&l->t.v, i, buf);
|
|
|
|
// Increment the index. We minus 1 because it has already been incremented.
|
|
l->i += i - 1;
|
|
|
|
return BC_STATUS_SUCCESS;
|
|
}
|
|
|
|
static void bc_lex_init(BcLex *l, BcLexNext next)
|
|
{
|
|
l->next = next;
|
|
bc_char_vec_init(&l->t.v);
|
|
}
|
|
|
|
static void bc_lex_free(BcLex *l)
|
|
{
|
|
bc_vec_free(&l->t.v);
|
|
}
|
|
|
|
static void bc_lex_file(BcLex *l)
|
|
{
|
|
G.err_line = l->line = 1;
|
|
l->newline = false;
|
|
}
|
|
|
|
static BcStatus bc_lex_next(BcLex *l)
|
|
{
|
|
BcStatus s;
|
|
|
|
l->t.last = l->t.t;
|
|
if (l->t.last == BC_LEX_EOF) return bc_error("end of file");
|
|
|
|
l->line += l->newline;
|
|
G.err_line = l->line;
|
|
l->t.t = BC_LEX_EOF;
|
|
|
|
l->newline = (l->i == l->len);
|
|
if (l->newline) return BC_STATUS_SUCCESS;
|
|
|
|
// Loop until failure or we don't have whitespace. This
|
|
// is so the parser doesn't get inundated with whitespace.
|
|
do {
|
|
s = l->next(l);
|
|
} while (!s && l->t.t == BC_LEX_WHITESPACE);
|
|
|
|
return s;
|
|
}
|
|
|
|
static BcStatus bc_lex_text(BcLex *l, const char *text)
|
|
{
|
|
l->buf = text;
|
|
l->i = 0;
|
|
l->len = strlen(text);
|
|
l->t.t = l->t.last = BC_LEX_INVALID;
|
|
return bc_lex_next(l);
|
|
}
|
|
|
|
#if ENABLE_BC
|
|
static BcStatus bc_lex_identifier(BcLex *l)
|
|
{
|
|
BcStatus s;
|
|
unsigned i;
|
|
const char *buf = l->buf + l->i - 1;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(bc_lex_kws); ++i) {
|
|
const char *keyword8 = bc_lex_kws[i].name8;
|
|
unsigned j = 0;
|
|
while (buf[j] != '\0' && buf[j] == keyword8[j]) {
|
|
j++;
|
|
if (j == 8) goto match;
|
|
}
|
|
if (keyword8[j] != '\0')
|
|
continue;
|
|
match:
|
|
// buf starts with keyword bc_lex_kws[i]
|
|
l->t.t = BC_LEX_KEY_1st_keyword + i;
|
|
if (!bc_lex_kws_POSIX(i)) {
|
|
s = bc_posix_error_fmt("%sthe '%.8s' keyword", "POSIX does not allow ", bc_lex_kws[i].name8);
|
|
if (s) return s;
|
|
}
|
|
|
|
// We minus 1 because the index has already been incremented.
|
|
l->i += j - 1;
|
|
return BC_STATUS_SUCCESS;
|
|
}
|
|
|
|
s = bc_lex_name(l);
|
|
if (s) return s;
|
|
|
|
if (l->t.v.len > 2) {
|
|
// Prevent this:
|
|
// >>> qwe=1
|
|
// bc: POSIX only allows one character names; the following is bad: 'qwe=1
|
|
// '
|
|
unsigned len = strchrnul(buf, '\n') - buf;
|
|
s = bc_posix_error_fmt("POSIX only allows one character names; the following is bad: '%.*s'", len, buf);
|
|
}
|
|
|
|
return s;
|
|
}
|
|
|
|
static BcStatus bc_lex_string(BcLex *l)
|
|
{
|
|
size_t len, nls = 0, i = l->i;
|
|
char c;
|
|
|
|
l->t.t = BC_LEX_STR;
|
|
|
|
for (c = l->buf[i]; c != 0 && c != '"'; c = l->buf[++i]) nls += (c == '\n');
|
|
|
|
if (c == '\0') {
|
|
l->i = i;
|
|
return bc_error("string end could not be found");
|
|
}
|
|
|
|
len = i - l->i;
|
|
// This check makes sense only if size_t is (much) larger than BC_MAX_STRING.
|
|
if (SIZE_MAX > (BC_MAX_STRING | 0xff)) {
|
|
if (len > BC_MAX_STRING)
|
|
return bc_error("string too long: must be [1,"BC_MAX_STRING_STR"]");
|
|
}
|
|
bc_vec_string(&l->t.v, len, l->buf + l->i);
|
|
|
|
l->i = i + 1;
|
|
l->line += nls;
|
|
G.err_line = l->line;
|
|
|
|
return BC_STATUS_SUCCESS;
|
|
}
|
|
|
|
static void bc_lex_assign(BcLex *l, BcLexType with, BcLexType without)
|
|
{
|
|
if (l->buf[l->i] == '=') {
|
|
++l->i;
|
|
l->t.t = with;
|
|
}
|
|
else
|
|
l->t.t = without;
|
|
}
|
|
|
|
static BcStatus bc_lex_comment(BcLex *l)
|
|
{
|
|
size_t i, nls = 0;
|
|
const char *buf = l->buf;
|
|
|
|
l->t.t = BC_LEX_WHITESPACE;
|
|
i = ++l->i;
|
|
for (;;) {
|
|
char c = buf[i];
|
|
check_star:
|
|
if (c == '*') {
|
|
c = buf[++i];
|
|
if (c == '/')
|
|
break;
|
|
goto check_star;
|
|
}
|
|
if (c == '\0') {
|
|
l->i = i;
|
|
return bc_error("comment end could not be found");
|
|
}
|
|
nls += (c == '\n');
|
|
i++;
|
|
}
|
|
|
|
l->i = i + 1;
|
|
l->line += nls;
|
|
G.err_line = l->line;
|
|
|
|
return BC_STATUS_SUCCESS;
|
|
}
|
|
|
|
static BcStatus bc_lex_token(BcLex *l)
|
|
{
|
|
BcStatus s = BC_STATUS_SUCCESS;
|
|
char c = l->buf[l->i++], c2;
|
|
|
|
// This is the workhorse of the lexer.
|
|
switch (c) {
|
|
|
|
case '\0':
|
|
case '\n':
|
|
{
|
|
l->newline = true;
|
|
l->t.t = !c ? BC_LEX_EOF : BC_LEX_NLINE;
|
|
break;
|
|
}
|
|
|
|
case '\t':
|
|
case '\v':
|
|
case '\f':
|
|
case '\r':
|
|
case ' ':
|
|
{
|
|
bc_lex_whitespace(l);
|
|
break;
|
|
}
|
|
|
|
case '!':
|
|
{
|
|
bc_lex_assign(l, BC_LEX_OP_REL_NE, BC_LEX_OP_BOOL_NOT);
|
|
|
|
if (l->t.t == BC_LEX_OP_BOOL_NOT) {
|
|
s = bc_POSIX_does_not_allow_bool_ops_this_is_bad("!");
|
|
if (s) return s;
|
|
}
|
|
|
|
break;
|
|
}
|
|
|
|
case '"':
|
|
{
|
|
s = bc_lex_string(l);
|
|
break;
|
|
}
|
|
|
|
case '#':
|
|
{
|
|
s = bc_POSIX_does_not_allow("'#' script comments");
|
|
if (s) return s;
|
|
|
|
bc_lex_lineComment(l);
|
|
|
|
break;
|
|
}
|
|
|
|
case '%':
|
|
{
|
|
bc_lex_assign(l, BC_LEX_OP_ASSIGN_MODULUS, BC_LEX_OP_MODULUS);
|
|
break;
|
|
}
|
|
|
|
case '&':
|
|
{
|
|
c2 = l->buf[l->i];
|
|
if (c2 == '&') {
|
|
|
|
s = bc_POSIX_does_not_allow_bool_ops_this_is_bad("&&");
|
|
if (s) return s;
|
|
|
|
++l->i;
|
|
l->t.t = BC_LEX_OP_BOOL_AND;
|
|
}
|
|
else {
|
|
l->t.t = BC_LEX_INVALID;
|
|
s = bc_error_bad_character('&');
|
|
}
|
|
|
|
break;
|
|
}
|
|
|
|
case '(':
|
|
case ')':
|
|
{
|
|
l->t.t = (BcLexType)(c - '(' + BC_LEX_LPAREN);
|
|
break;
|
|
}
|
|
|
|
case '*':
|
|
{
|
|
bc_lex_assign(l, BC_LEX_OP_ASSIGN_MULTIPLY, BC_LEX_OP_MULTIPLY);
|
|
break;
|
|
}
|
|
|
|
case '+':
|
|
{
|
|
c2 = l->buf[l->i];
|
|
if (c2 == '+') {
|
|
++l->i;
|
|
l->t.t = BC_LEX_OP_INC;
|
|
}
|
|
else
|
|
bc_lex_assign(l, BC_LEX_OP_ASSIGN_PLUS, BC_LEX_OP_PLUS);
|
|
break;
|
|
}
|
|
|
|
case ',':
|
|
{
|
|
l->t.t = BC_LEX_COMMA;
|
|
break;
|
|
}
|
|
|
|
case '-':
|
|
{
|
|
c2 = l->buf[l->i];
|
|
if (c2 == '-') {
|
|
++l->i;
|
|
l->t.t = BC_LEX_OP_DEC;
|
|
}
|
|
else
|
|
bc_lex_assign(l, BC_LEX_OP_ASSIGN_MINUS, BC_LEX_OP_MINUS);
|
|
break;
|
|
}
|
|
|
|
case '.':
|
|
{
|
|
if (isdigit(l->buf[l->i]))
|
|
s = bc_lex_number(l, c);
|
|
else {
|
|
l->t.t = BC_LEX_KEY_LAST;
|
|
s = bc_POSIX_does_not_allow("a period ('.') as a shortcut for the last result");
|
|
}
|
|
break;
|
|
}
|
|
|
|
case '/':
|
|
{
|
|
c2 = l->buf[l->i];
|
|
if (c2 == '*')
|
|
s = bc_lex_comment(l);
|
|
else
|
|
bc_lex_assign(l, BC_LEX_OP_ASSIGN_DIVIDE, BC_LEX_OP_DIVIDE);
|
|
break;
|
|
}
|
|
|
|
case '0':
|
|
case '1':
|
|
case '2':
|
|
case '3':
|
|
case '4':
|
|
case '5':
|
|
case '6':
|
|
case '7':
|
|
case '8':
|
|
case '9':
|
|
case 'A':
|
|
case 'B':
|
|
case 'C':
|
|
case 'D':
|
|
case 'E':
|
|
case 'F':
|
|
{
|
|
s = bc_lex_number(l, c);
|
|
break;
|
|
}
|
|
|
|
case ';':
|
|
{
|
|
l->t.t = BC_LEX_SCOLON;
|
|
break;
|
|
}
|
|
|
|
case '<':
|
|
{
|
|
bc_lex_assign(l, BC_LEX_OP_REL_LE, BC_LEX_OP_REL_LT);
|
|
break;
|
|
}
|
|
|
|
case '=':
|
|
{
|
|
bc_lex_assign(l, BC_LEX_OP_REL_EQ, BC_LEX_OP_ASSIGN);
|
|
break;
|
|
}
|
|
|
|
case '>':
|
|
{
|
|
bc_lex_assign(l, BC_LEX_OP_REL_GE, BC_LEX_OP_REL_GT);
|
|
break;
|
|
}
|
|
|
|
case '[':
|
|
case ']':
|
|
{
|
|
l->t.t = (BcLexType)(c - '[' + BC_LEX_LBRACKET);
|
|
break;
|
|
}
|
|
|
|
case '\\':
|
|
{
|
|
if (l->buf[l->i] == '\n') {
|
|
l->t.t = BC_LEX_WHITESPACE;
|
|
++l->i;
|
|
}
|
|
else
|
|
s = bc_error_bad_character(c);
|
|
break;
|
|
}
|
|
|
|
case '^':
|
|
{
|
|
bc_lex_assign(l, BC_LEX_OP_ASSIGN_POWER, BC_LEX_OP_POWER);
|
|
break;
|
|
}
|
|
|
|
case 'a':
|
|
case 'b':
|
|
case 'c':
|
|
case 'd':
|
|
case 'e':
|
|
case 'f':
|
|
case 'g':
|
|
case 'h':
|
|
case 'i':
|
|
case 'j':
|
|
case 'k':
|
|
case 'l':
|
|
case 'm':
|
|
case 'n':
|
|
case 'o':
|
|
case 'p':
|
|
case 'q':
|
|
case 'r':
|
|
case 's':
|
|
case 't':
|
|
case 'u':
|
|
case 'v':
|
|
case 'w':
|
|
case 'x':
|
|
case 'y':
|
|
case 'z':
|
|
{
|
|
s = bc_lex_identifier(l);
|
|
break;
|
|
}
|
|
|
|
case '{':
|
|
case '}':
|
|
{
|
|
l->t.t = (BcLexType)(c - '{' + BC_LEX_LBRACE);
|
|
break;
|
|
}
|
|
|
|
case '|':
|
|
{
|
|
c2 = l->buf[l->i];
|
|
|
|
if (c2 == '|') {
|
|
s = bc_POSIX_does_not_allow_bool_ops_this_is_bad("||");
|
|
if (s) return s;
|
|
|
|
++l->i;
|
|
l->t.t = BC_LEX_OP_BOOL_OR;
|
|
}
|
|
else {
|
|
l->t.t = BC_LEX_INVALID;
|
|
s = bc_error_bad_character(c);
|
|
}
|
|
|
|
break;
|
|
}
|
|
|
|
default:
|
|
{
|
|
l->t.t = BC_LEX_INVALID;
|
|
s = bc_error_bad_character(c);
|
|
break;
|
|
}
|
|
}
|
|
|
|
return s;
|
|
}
|
|
#endif // ENABLE_BC
|
|
|
|
#if ENABLE_DC
|
|
static BcStatus dc_lex_register(BcLex *l)
|
|
{
|
|
BcStatus s = BC_STATUS_SUCCESS;
|
|
|
|
if (isspace(l->buf[l->i - 1])) {
|
|
bc_lex_whitespace(l);
|
|
++l->i;
|
|
if (!G_exreg)
|
|
s = bc_error("extended register");
|
|
else
|
|
s = bc_lex_name(l);
|
|
}
|
|
else {
|
|
bc_vec_pop_all(&l->t.v);
|
|
bc_vec_push(&l->t.v, &l->buf[l->i - 1]);
|
|
bc_vec_pushZeroByte(&l->t.v);
|
|
l->t.t = BC_LEX_NAME;
|
|
}
|
|
|
|
return s;
|
|
}
|
|
|
|
static BcStatus dc_lex_string(BcLex *l)
|
|
{
|
|
size_t depth = 1, nls = 0, i = l->i;
|
|
char c;
|
|
|
|
l->t.t = BC_LEX_STR;
|
|
bc_vec_pop_all(&l->t.v);
|
|
|
|
for (c = l->buf[i]; c != 0 && depth; c = l->buf[++i]) {
|
|
|
|
depth += (c == '[' && (i == l->i || l->buf[i - 1] != '\\'));
|
|
depth -= (c == ']' && (i == l->i || l->buf[i - 1] != '\\'));
|
|
nls += (c == '\n');
|
|
|
|
if (depth) bc_vec_push(&l->t.v, &c);
|
|
}
|
|
|
|
if (c == '\0') {
|
|
l->i = i;
|
|
return bc_error("string end could not be found");
|
|
}
|
|
|
|
bc_vec_pushZeroByte(&l->t.v);
|
|
// This check makes sense only if size_t is (much) larger than BC_MAX_STRING.
|
|
if (SIZE_MAX > (BC_MAX_STRING | 0xff)) {
|
|
if (i - l->i > BC_MAX_STRING)
|
|
return bc_error("string too long: must be [1,"BC_MAX_STRING_STR"]");
|
|
}
|
|
|
|
l->i = i;
|
|
l->line += nls;
|
|
G.err_line = l->line;
|
|
|
|
return BC_STATUS_SUCCESS;
|
|
}
|
|
|
|
static BcStatus dc_lex_token(BcLex *l)
|
|
{
|
|
BcStatus s = BC_STATUS_SUCCESS;
|
|
char c = l->buf[l->i++], c2;
|
|
size_t i;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(dc_lex_regs); ++i) {
|
|
if (l->t.last == dc_lex_regs[i])
|
|
return dc_lex_register(l);
|
|
}
|
|
|
|
if (c >= '%' && c <= '~' &&
|
|
(l->t.t = dc_lex_tokens[(c - '%')]) != BC_LEX_INVALID)
|
|
{
|
|
return s;
|
|
}
|
|
|
|
// This is the workhorse of the lexer.
|
|
switch (c) {
|
|
|
|
case '\0':
|
|
{
|
|
l->t.t = BC_LEX_EOF;
|
|
break;
|
|
}
|
|
|
|
case '\n':
|
|
case '\t':
|
|
case '\v':
|
|
case '\f':
|
|
case '\r':
|
|
case ' ':
|
|
{
|
|
l->newline = (c == '\n');
|
|
bc_lex_whitespace(l);
|
|
break;
|
|
}
|
|
|
|
case '!':
|
|
{
|
|
c2 = l->buf[l->i];
|
|
|
|
if (c2 == '=')
|
|
l->t.t = BC_LEX_OP_REL_NE;
|
|
else if (c2 == '<')
|
|
l->t.t = BC_LEX_OP_REL_LE;
|
|
else if (c2 == '>')
|
|
l->t.t = BC_LEX_OP_REL_GE;
|
|
else
|
|
return bc_error_bad_character(c);
|
|
|
|
++l->i;
|
|
break;
|
|
}
|
|
|
|
case '#':
|
|
{
|
|
bc_lex_lineComment(l);
|
|
break;
|
|
}
|
|
|
|
case '.':
|
|
{
|
|
if (isdigit(l->buf[l->i]))
|
|
s = bc_lex_number(l, c);
|
|
else
|
|
s = bc_error_bad_character(c);
|
|
break;
|
|
}
|
|
|
|
case '0':
|
|
case '1':
|
|
case '2':
|
|
case '3':
|
|
case '4':
|
|
case '5':
|
|
case '6':
|
|
case '7':
|
|
case '8':
|
|
case '9':
|
|
case 'A':
|
|
case 'B':
|
|
case 'C':
|
|
case 'D':
|
|
case 'E':
|
|
case 'F':
|
|
{
|
|
s = bc_lex_number(l, c);
|
|
break;
|
|
}
|
|
|
|
case '[':
|
|
{
|
|
s = dc_lex_string(l);
|
|
break;
|
|
}
|
|
|
|
default:
|
|
{
|
|
l->t.t = BC_LEX_INVALID;
|
|
s = bc_error_bad_character(c);
|
|
break;
|
|
}
|
|
}
|
|
|
|
return s;
|
|
}
|
|
#endif // ENABLE_DC
|
|
|
|
static void bc_program_addFunc(char *name, size_t *idx);
|
|
|
|
static void bc_parse_addFunc(BcParse *p, char *name, size_t *idx)
|
|
{
|
|
bc_program_addFunc(name, idx);
|
|
p->func = bc_vec_item(&G.prog.fns, p->fidx);
|
|
}
|
|
|
|
#define bc_parse_push(p, i) bc_vec_pushByte(&(p)->func->code, (char) (i))
|
|
|
|
static void bc_parse_pushName(BcParse *p, char *name)
|
|
{
|
|
size_t i = 0, len = strlen(name);
|
|
|
|
for (; i < len; ++i) bc_parse_push(p, name[i]);
|
|
bc_parse_push(p, BC_PARSE_STREND);
|
|
|
|
free(name);
|
|
}
|
|
|
|
static void bc_parse_pushIndex(BcParse *p, size_t idx)
|
|
{
|
|
unsigned char amt, i, nums[sizeof(size_t)];
|
|
|
|
for (amt = 0; idx; ++amt) {
|
|
nums[amt] = (char) idx;
|
|
idx = (idx & ((unsigned long) ~(UCHAR_MAX))) >> sizeof(char) * CHAR_BIT;
|
|
}
|
|
|
|
bc_parse_push(p, amt);
|
|
for (i = 0; i < amt; ++i) bc_parse_push(p, nums[i]);
|
|
}
|
|
|
|
static void bc_parse_number(BcParse *p, BcInst *prev, size_t *nexs)
|
|
{
|
|
char *num = xstrdup(p->l.t.v.v);
|
|
size_t idx = G.prog.consts.len;
|
|
|
|
bc_vec_push(&G.prog.consts, &num);
|
|
|
|
bc_parse_push(p, BC_INST_NUM);
|
|
bc_parse_pushIndex(p, idx);
|
|
|
|
++(*nexs);
|
|
(*prev) = BC_INST_NUM;
|
|
}
|
|
|
|
static BcStatus bc_parse_text(BcParse *p, const char *text)
|
|
{
|
|
BcStatus s;
|
|
|
|
p->func = bc_vec_item(&G.prog.fns, p->fidx);
|
|
|
|
if (!text[0] && !BC_PARSE_CAN_EXEC(p)) {
|
|
p->l.t.t = BC_LEX_INVALID;
|
|
s = p->parse(p);
|
|
if (s) return s;
|
|
if (!BC_PARSE_CAN_EXEC(p))
|
|
return bc_error("file is not executable");
|
|
}
|
|
|
|
return bc_lex_text(&p->l, text);
|
|
}
|
|
|
|
// Called when parsing or execution detects a failure,
|
|
// resets execution structures.
|
|
static void bc_program_reset(void)
|
|
{
|
|
BcFunc *f;
|
|
BcInstPtr *ip;
|
|
|
|
bc_vec_npop(&G.prog.stack, G.prog.stack.len - 1);
|
|
bc_vec_pop_all(&G.prog.results);
|
|
|
|
f = bc_vec_item(&G.prog.fns, 0);
|
|
ip = bc_vec_top(&G.prog.stack);
|
|
ip->idx = f->code.len;
|
|
}
|
|
|
|
#define bc_parse_updateFunc(p, f) \
|
|
((p)->func = bc_vec_item(&G.prog.fns, ((p)->fidx = (f))))
|
|
|
|
// Called when bc/dc_parse_parse() detects a failure,
|
|
// resets parsing structures.
|
|
static void bc_parse_reset(BcParse *p)
|
|
{
|
|
if (p->fidx != BC_PROG_MAIN) {
|
|
p->func->nparams = 0;
|
|
bc_vec_pop_all(&p->func->code);
|
|
bc_vec_pop_all(&p->func->autos);
|
|
bc_vec_pop_all(&p->func->labels);
|
|
|
|
bc_parse_updateFunc(p, BC_PROG_MAIN);
|
|
}
|
|
|
|
p->l.i = p->l.len;
|
|
p->l.t.t = BC_LEX_EOF;
|
|
p->auto_part = (p->nbraces = 0);
|
|
|
|
bc_vec_npop(&p->flags, p->flags.len - 1);
|
|
bc_vec_pop_all(&p->exits);
|
|
bc_vec_pop_all(&p->conds);
|
|
bc_vec_pop_all(&p->ops);
|
|
|
|
bc_program_reset();
|
|
}
|
|
|
|
static void bc_parse_free(BcParse *p)
|
|
{
|
|
bc_vec_free(&p->flags);
|
|
bc_vec_free(&p->exits);
|
|
bc_vec_free(&p->conds);
|
|
bc_vec_free(&p->ops);
|
|
bc_lex_free(&p->l);
|
|
}
|
|
|
|
static void bc_parse_create(BcParse *p, size_t func,
|
|
BcParseParse parse, BcLexNext next)
|
|
{
|
|
memset(p, 0, sizeof(BcParse));
|
|
|
|
bc_lex_init(&p->l, next);
|
|
bc_vec_init(&p->flags, sizeof(uint8_t), NULL);
|
|
bc_vec_init(&p->exits, sizeof(BcInstPtr), NULL);
|
|
bc_vec_init(&p->conds, sizeof(size_t), NULL);
|
|
bc_vec_pushZeroByte(&p->flags);
|
|
bc_vec_init(&p->ops, sizeof(BcLexType), NULL);
|
|
|
|
p->parse = parse;
|
|
// p->auto_part = p->nbraces = 0; - already is
|
|
bc_parse_updateFunc(p, func);
|
|
}
|
|
|
|
#if ENABLE_BC
|
|
|
|
#define BC_PARSE_TOP_OP(p) (*((BcLexType *) bc_vec_top(&(p)->ops)))
|
|
#define BC_PARSE_LEAF(p, rparen) \
|
|
(((p) >= BC_INST_NUM && (p) <= BC_INST_SQRT) || (rparen) || \
|
|
(p) == BC_INST_INC_POST || (p) == BC_INST_DEC_POST)
|
|
|
|
// We can calculate the conversion between tokens and exprs by subtracting the
|
|
// position of the first operator in the lex enum and adding the position of the
|
|
// first in the expr enum. Note: This only works for binary operators.
|
|
#define BC_PARSE_TOKEN_INST(t) ((char) ((t) -BC_LEX_NEG + BC_INST_NEG))
|
|
|
|
static BcStatus bc_parse_else(BcParse *p);
|
|
static BcStatus bc_parse_stmt(BcParse *p);
|
|
static BcStatus bc_parse_expr(BcParse *p, uint8_t flags, BcParseNext next);
|
|
static BcStatus bc_parse_expr_empty_ok(BcParse *p, uint8_t flags, BcParseNext next);
|
|
|
|
static BcStatus bc_parse_operator(BcParse *p, BcLexType type, size_t start,
|
|
size_t *nexprs, bool next)
|
|
{
|
|
BcStatus s = BC_STATUS_SUCCESS;
|
|
BcLexType t;
|
|
char l, r = bc_parse_op_PREC(type - BC_LEX_OP_INC);
|
|
bool left = bc_parse_op_LEFT(type - BC_LEX_OP_INC);
|
|
|
|
while (p->ops.len > start) {
|
|
|
|
t = BC_PARSE_TOP_OP(p);
|
|
if (t == BC_LEX_LPAREN) break;
|
|
|
|
l = bc_parse_op_PREC(t - BC_LEX_OP_INC);
|
|
if (l >= r && (l != r || !left)) break;
|
|
|
|
bc_parse_push(p, BC_PARSE_TOKEN_INST(t));
|
|
bc_vec_pop(&p->ops);
|
|
*nexprs -= t != BC_LEX_OP_BOOL_NOT && t != BC_LEX_NEG;
|
|
}
|
|
|
|
bc_vec_push(&p->ops, &type);
|
|
if (next) s = bc_lex_next(&p->l);
|
|
|
|
return s;
|
|
}
|
|
|
|
static BcStatus bc_parse_rightParen(BcParse *p, size_t ops_bgn, size_t *nexs)
|
|
{
|
|
BcLexType top;
|
|
|
|
if (p->ops.len <= ops_bgn)
|
|
return bc_error_bad_expression();
|
|
top = BC_PARSE_TOP_OP(p);
|
|
|
|
while (top != BC_LEX_LPAREN) {
|
|
|
|
bc_parse_push(p, BC_PARSE_TOKEN_INST(top));
|
|
|
|
bc_vec_pop(&p->ops);
|
|
*nexs -= top != BC_LEX_OP_BOOL_NOT && top != BC_LEX_NEG;
|
|
|
|
if (p->ops.len <= ops_bgn)
|
|
return bc_error_bad_expression();
|
|
top = BC_PARSE_TOP_OP(p);
|
|
}
|
|
|
|
bc_vec_pop(&p->ops);
|
|
|
|
return bc_lex_next(&p->l);
|
|
}
|
|
|
|
static BcStatus bc_parse_params(BcParse *p, uint8_t flags)
|
|
{
|
|
BcStatus s;
|
|
bool comma = false;
|
|
size_t nparams;
|
|
|
|
s = bc_lex_next(&p->l);
|
|
if (s) return s;
|
|
|
|
for (nparams = 0; p->l.t.t != BC_LEX_RPAREN; ++nparams) {
|
|
|
|
flags = (flags & ~(BC_PARSE_PRINT | BC_PARSE_REL)) | BC_PARSE_ARRAY;
|
|
s = bc_parse_expr(p, flags, bc_parse_next_param);
|
|
if (s) return s;
|
|
|
|
comma = p->l.t.t == BC_LEX_COMMA;
|
|
if (comma) {
|
|
s = bc_lex_next(&p->l);
|
|
if (s) return s;
|
|
}
|
|
}
|
|
|
|
if (comma) return bc_error_bad_token();
|
|
bc_parse_push(p, BC_INST_CALL);
|
|
bc_parse_pushIndex(p, nparams);
|
|
|
|
return BC_STATUS_SUCCESS;
|
|
}
|
|
|
|
static BcStatus bc_parse_call(BcParse *p, char *name, uint8_t flags)
|
|
{
|
|
BcStatus s;
|
|
BcId entry, *entry_ptr;
|
|
size_t idx;
|
|
|
|
entry.name = name;
|
|
|
|
s = bc_parse_params(p, flags);
|
|
if (s) goto err;
|
|
|
|
if (p->l.t.t != BC_LEX_RPAREN) {
|
|
s = bc_error_bad_token();
|
|
goto err;
|
|
}
|
|
|
|
idx = bc_map_index(&G.prog.fn_map, &entry);
|
|
|
|
if (idx == BC_VEC_INVALID_IDX) {
|
|
name = xstrdup(entry.name);
|
|
bc_parse_addFunc(p, name, &idx);
|
|
idx = bc_map_index(&G.prog.fn_map, &entry);
|
|
free(entry.name);
|
|
}
|
|
else
|
|
free(name);
|
|
|
|
entry_ptr = bc_vec_item(&G.prog.fn_map, idx);
|
|
bc_parse_pushIndex(p, entry_ptr->idx);
|
|
|
|
return bc_lex_next(&p->l);
|
|
|
|
err:
|
|
free(name);
|
|
return s;
|
|
}
|
|
|
|
static BcStatus bc_parse_name(BcParse *p, BcInst *type, uint8_t flags)
|
|
{
|
|
BcStatus s;
|
|
char *name;
|
|
|
|
name = xstrdup(p->l.t.v.v);
|
|
s = bc_lex_next(&p->l);
|
|
if (s) goto err;
|
|
|
|
if (p->l.t.t == BC_LEX_LBRACKET) {
|
|
|
|
s = bc_lex_next(&p->l);
|
|
if (s) goto err;
|
|
|
|
if (p->l.t.t == BC_LEX_RBRACKET) {
|
|
|
|
if (!(flags & BC_PARSE_ARRAY)) {
|
|
s = bc_error_bad_expression();
|
|
goto err;
|
|
}
|
|
|
|
*type = BC_INST_ARRAY;
|
|
}
|
|
else {
|
|
|
|
*type = BC_INST_ARRAY_ELEM;
|
|
|
|
flags &= ~(BC_PARSE_PRINT | BC_PARSE_REL);
|
|
s = bc_parse_expr(p, flags, bc_parse_next_elem);
|
|
if (s) goto err;
|
|
}
|
|
|
|
s = bc_lex_next(&p->l);
|
|
if (s) goto err;
|
|
bc_parse_push(p, *type);
|
|
bc_parse_pushName(p, name);
|
|
}
|
|
else if (p->l.t.t == BC_LEX_LPAREN) {
|
|
|
|
if (flags & BC_PARSE_NOCALL) {
|
|
s = bc_error_bad_token();
|
|
goto err;
|
|
}
|
|
|
|
*type = BC_INST_CALL;
|
|
s = bc_parse_call(p, name, flags);
|
|
}
|
|
else {
|
|
*type = BC_INST_VAR;
|
|
bc_parse_push(p, BC_INST_VAR);
|
|
bc_parse_pushName(p, name);
|
|
}
|
|
|
|
return s;
|
|
|
|
err:
|
|
free(name);
|
|
return s;
|
|
}
|
|
|
|
static BcStatus bc_parse_read(BcParse *p)
|
|
{
|
|
BcStatus s;
|
|
|
|
s = bc_lex_next(&p->l);
|
|
if (s) return s;
|
|
if (p->l.t.t != BC_LEX_LPAREN) return bc_error_bad_token();
|
|
|
|
s = bc_lex_next(&p->l);
|
|
if (s) return s;
|
|
if (p->l.t.t != BC_LEX_RPAREN) return bc_error_bad_token();
|
|
|
|
bc_parse_push(p, BC_INST_READ);
|
|
|
|
return bc_lex_next(&p->l);
|
|
}
|
|
|
|
static BcStatus bc_parse_builtin(BcParse *p, BcLexType type, uint8_t flags,
|
|
BcInst *prev)
|
|
{
|
|
BcStatus s;
|
|
|
|
s = bc_lex_next(&p->l);
|
|
if (s) return s;
|
|
if (p->l.t.t != BC_LEX_LPAREN) return bc_error_bad_token();
|
|
|
|
flags = (flags & ~(BC_PARSE_PRINT | BC_PARSE_REL)) | BC_PARSE_ARRAY;
|
|
|
|
s = bc_lex_next(&p->l);
|
|
if (s) return s;
|
|
|
|
s = bc_parse_expr(p, flags, bc_parse_next_rel);
|
|
if (s) return s;
|
|
|
|
if (p->l.t.t != BC_LEX_RPAREN) return bc_error_bad_token();
|
|
|
|
*prev = (type == BC_LEX_KEY_LENGTH) ? BC_INST_LENGTH : BC_INST_SQRT;
|
|
bc_parse_push(p, *prev);
|
|
|
|
return bc_lex_next(&p->l);
|
|
}
|
|
|
|
static BcStatus bc_parse_scale(BcParse *p, BcInst *type, uint8_t flags)
|
|
{
|
|
BcStatus s;
|
|
|
|
s = bc_lex_next(&p->l);
|
|
if (s) return s;
|
|
|
|
if (p->l.t.t != BC_LEX_LPAREN) {
|
|
*type = BC_INST_SCALE;
|
|
bc_parse_push(p, BC_INST_SCALE);
|
|
return BC_STATUS_SUCCESS;
|
|
}
|
|
|
|
*type = BC_INST_SCALE_FUNC;
|
|
flags &= ~(BC_PARSE_PRINT | BC_PARSE_REL);
|
|
|
|
s = bc_lex_next(&p->l);
|
|
if (s) return s;
|
|
|
|
s = bc_parse_expr(p, flags, bc_parse_next_rel);
|
|
if (s) return s;
|
|
if (p->l.t.t != BC_LEX_RPAREN) return bc_error_bad_token();
|
|
bc_parse_push(p, BC_INST_SCALE_FUNC);
|
|
|
|
return bc_lex_next(&p->l);
|
|
}
|
|
|
|
static BcStatus bc_parse_incdec(BcParse *p, BcInst *prev, bool *paren_expr,
|
|
size_t *nexprs, uint8_t flags)
|
|
{
|
|
BcStatus s;
|
|
BcLexType type;
|
|
char inst;
|
|
BcInst etype = *prev;
|
|
|
|
if (etype == BC_INST_VAR || etype == BC_INST_ARRAY_ELEM ||
|
|
etype == BC_INST_SCALE || etype == BC_INST_LAST ||
|
|
etype == BC_INST_IBASE || etype == BC_INST_OBASE)
|
|
{
|
|
*prev = inst = BC_INST_INC_POST + (p->l.t.t != BC_LEX_OP_INC);
|
|
bc_parse_push(p, inst);
|
|
s = bc_lex_next(&p->l);
|
|
}
|
|
else {
|
|
|
|
*prev = inst = BC_INST_INC_PRE + (p->l.t.t != BC_LEX_OP_INC);
|
|
*paren_expr = true;
|
|
|
|
s = bc_lex_next(&p->l);
|
|
if (s) return s;
|
|
type = p->l.t.t;
|
|
|
|
// Because we parse the next part of the expression
|
|
// right here, we need to increment this.
|
|
*nexprs = *nexprs + 1;
|
|
|
|
switch (type) {
|
|
|
|
case BC_LEX_NAME:
|
|
{
|
|
s = bc_parse_name(p, prev, flags | BC_PARSE_NOCALL);
|
|
break;
|
|
}
|
|
|
|
case BC_LEX_KEY_IBASE:
|
|
case BC_LEX_KEY_LAST:
|
|
case BC_LEX_KEY_OBASE:
|
|
{
|
|
bc_parse_push(p, type - BC_LEX_KEY_IBASE + BC_INST_IBASE);
|
|
s = bc_lex_next(&p->l);
|
|
break;
|
|
}
|
|
|
|
case BC_LEX_KEY_SCALE:
|
|
{
|
|
s = bc_lex_next(&p->l);
|
|
if (s) return s;
|
|
if (p->l.t.t == BC_LEX_LPAREN)
|
|
s = bc_error_bad_token();
|
|
else
|
|
bc_parse_push(p, BC_INST_SCALE);
|
|
break;
|
|
}
|
|
|
|
default:
|
|
{
|
|
s = bc_error_bad_token();
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!s) bc_parse_push(p, inst);
|
|
}
|
|
|
|
return s;
|
|
}
|
|
|
|
static BcStatus bc_parse_minus(BcParse *p, BcInst *prev, size_t ops_bgn,
|
|
bool rparen, size_t *nexprs)
|
|
{
|
|
BcStatus s;
|
|
BcLexType type;
|
|
BcInst etype = *prev;
|
|
|
|
s = bc_lex_next(&p->l);
|
|
if (s) return s;
|
|
|
|
type = rparen || etype == BC_INST_INC_POST || etype == BC_INST_DEC_POST ||
|
|
(etype >= BC_INST_NUM && etype <= BC_INST_SQRT) ?
|
|
BC_LEX_OP_MINUS :
|
|
BC_LEX_NEG;
|
|
*prev = BC_PARSE_TOKEN_INST(type);
|
|
|
|
// We can just push onto the op stack because this is the largest
|
|
// precedence operator that gets pushed. Inc/dec does not.
|
|
if (type != BC_LEX_OP_MINUS)
|
|
bc_vec_push(&p->ops, &type);
|
|
else
|
|
s = bc_parse_operator(p, type, ops_bgn, nexprs, false);
|
|
|
|
return s;
|
|
}
|
|
|
|
static BcStatus bc_parse_string(BcParse *p, char inst)
|
|
{
|
|
char *str = xstrdup(p->l.t.v.v);
|
|
|
|
bc_parse_push(p, BC_INST_STR);
|
|
bc_parse_pushIndex(p, G.prog.strs.len);
|
|
bc_vec_push(&G.prog.strs, &str);
|
|
bc_parse_push(p, inst);
|
|
|
|
return bc_lex_next(&p->l);
|
|
}
|
|
|
|
static BcStatus bc_parse_print(BcParse *p)
|
|
{
|
|
BcStatus s;
|
|
BcLexType type;
|
|
bool comma = false;
|
|
|
|
s = bc_lex_next(&p->l);
|
|
if (s) return s;
|
|
|
|
type = p->l.t.t;
|
|
|
|
if (type == BC_LEX_SCOLON || type == BC_LEX_NLINE)
|
|
return bc_error("bad print statement");
|
|
|
|
while (!s && type != BC_LEX_SCOLON && type != BC_LEX_NLINE) {
|
|
|
|
if (type == BC_LEX_STR)
|
|
s = bc_parse_string(p, BC_INST_PRINT_POP);
|
|
else {
|
|
s = bc_parse_expr(p, 0, bc_parse_next_print);
|
|
if (s) return s;
|
|
bc_parse_push(p, BC_INST_PRINT_POP);
|
|
}
|
|
|
|
if (s) return s;
|
|
|
|
comma = p->l.t.t == BC_LEX_COMMA;
|
|
if (comma) s = bc_lex_next(&p->l);
|
|
type = p->l.t.t;
|
|
}
|
|
|
|
if (s) return s;
|
|
if (comma) return bc_error_bad_token();
|
|
|
|
return bc_lex_next(&p->l);
|
|
}
|
|
|
|
static BcStatus bc_parse_return(BcParse *p)
|
|
{
|
|
BcStatus s;
|
|
BcLexType t;
|
|
bool paren;
|
|
|
|
if (!BC_PARSE_FUNC(p)) return bc_error_bad_token();
|
|
|
|
s = bc_lex_next(&p->l);
|
|
if (s) return s;
|
|
|
|
t = p->l.t.t;
|
|
paren = t == BC_LEX_LPAREN;
|
|
|
|
if (t == BC_LEX_NLINE || t == BC_LEX_SCOLON)
|
|
bc_parse_push(p, BC_INST_RET0);
|
|
else {
|
|
|
|
s = bc_parse_expr_empty_ok(p, 0, bc_parse_next_expr);
|
|
if (s == BC_STATUS_PARSE_EMPTY_EXP) {
|
|
bc_parse_push(p, BC_INST_RET0);
|
|
s = bc_lex_next(&p->l);
|
|
}
|
|
if (s) return s;
|
|
|
|
if (!paren || p->l.t.last != BC_LEX_RPAREN) {
|
|
s = bc_POSIX_requires("parentheses around return expressions");
|
|
if (s) return s;
|
|
}
|
|
|
|
bc_parse_push(p, BC_INST_RET);
|
|
}
|
|
|
|
return s;
|
|
}
|
|
|
|
static BcStatus bc_parse_endBody(BcParse *p, bool brace)
|
|
{
|
|
BcStatus s = BC_STATUS_SUCCESS;
|
|
|
|
if (p->flags.len <= 1 || (brace && p->nbraces == 0))
|
|
return bc_error_bad_token();
|
|
|
|
if (brace) {
|
|
|
|
if (p->l.t.t == BC_LEX_RBRACE) {
|
|
if (!p->nbraces) return bc_error_bad_token();
|
|
--p->nbraces;
|
|
s = bc_lex_next(&p->l);
|
|
if (s) return s;
|
|
}
|
|
else
|
|
return bc_error_bad_token();
|
|
}
|
|
|
|
if (BC_PARSE_IF(p)) {
|
|
|
|
uint8_t *flag_ptr;
|
|
|
|
while (p->l.t.t == BC_LEX_NLINE) {
|
|
s = bc_lex_next(&p->l);
|
|
if (s) return s;
|
|
}
|
|
|
|
bc_vec_pop(&p->flags);
|
|
|
|
flag_ptr = BC_PARSE_TOP_FLAG_PTR(p);
|
|
*flag_ptr = (*flag_ptr | BC_PARSE_FLAG_IF_END);
|
|
|
|
if (p->l.t.t == BC_LEX_KEY_ELSE) s = bc_parse_else(p);
|
|
}
|
|
else if (BC_PARSE_ELSE(p)) {
|
|
|
|
BcInstPtr *ip;
|
|
size_t *label;
|
|
|
|
bc_vec_pop(&p->flags);
|
|
|
|
ip = bc_vec_top(&p->exits);
|
|
label = bc_vec_item(&p->func->labels, ip->idx);
|
|
*label = p->func->code.len;
|
|
|
|
bc_vec_pop(&p->exits);
|
|
}
|
|
else if (BC_PARSE_FUNC_INNER(p)) {
|
|
bc_parse_push(p, BC_INST_RET0);
|
|
bc_parse_updateFunc(p, BC_PROG_MAIN);
|
|
bc_vec_pop(&p->flags);
|
|
}
|
|
else {
|
|
|
|
BcInstPtr *ip = bc_vec_top(&p->exits);
|
|
size_t *label = bc_vec_top(&p->conds);
|
|
|
|
bc_parse_push(p, BC_INST_JUMP);
|
|
bc_parse_pushIndex(p, *label);
|
|
|
|
label = bc_vec_item(&p->func->labels, ip->idx);
|
|
*label = p->func->code.len;
|
|
|
|
bc_vec_pop(&p->flags);
|
|
bc_vec_pop(&p->exits);
|
|
bc_vec_pop(&p->conds);
|
|
}
|
|
|
|
return s;
|
|
}
|
|
|
|
static void bc_parse_startBody(BcParse *p, uint8_t flags)
|
|
{
|
|
uint8_t *flag_ptr = BC_PARSE_TOP_FLAG_PTR(p);
|
|
flags |= (*flag_ptr & (BC_PARSE_FLAG_FUNC | BC_PARSE_FLAG_LOOP));
|
|
flags |= BC_PARSE_FLAG_BODY;
|
|
bc_vec_push(&p->flags, &flags);
|
|
}
|
|
|
|
static void bc_parse_noElse(BcParse *p)
|
|
{
|
|
BcInstPtr *ip;
|
|
size_t *label;
|
|
uint8_t *flag_ptr = BC_PARSE_TOP_FLAG_PTR(p);
|
|
|
|
*flag_ptr = (*flag_ptr & ~(BC_PARSE_FLAG_IF_END));
|
|
|
|
ip = bc_vec_top(&p->exits);
|
|
label = bc_vec_item(&p->func->labels, ip->idx);
|
|
*label = p->func->code.len;
|
|
|
|
bc_vec_pop(&p->exits);
|
|
}
|
|
|
|
static BcStatus bc_parse_if(BcParse *p)
|
|
{
|
|
BcStatus s;
|
|
BcInstPtr ip;
|
|
|
|
s = bc_lex_next(&p->l);
|
|
if (s) return s;
|
|
if (p->l.t.t != BC_LEX_LPAREN) return bc_error_bad_token();
|
|
|
|
s = bc_lex_next(&p->l);
|
|
if (s) return s;
|
|
s = bc_parse_expr(p, BC_PARSE_REL, bc_parse_next_rel);
|
|
if (s) return s;
|
|
if (p->l.t.t != BC_LEX_RPAREN) return bc_error_bad_token();
|
|
|
|
s = bc_lex_next(&p->l);
|
|
if (s) return s;
|
|
bc_parse_push(p, BC_INST_JUMP_ZERO);
|
|
|
|
ip.idx = p->func->labels.len;
|
|
ip.func = ip.len = 0;
|
|
|
|
bc_parse_pushIndex(p, ip.idx);
|
|
bc_vec_push(&p->exits, &ip);
|
|
bc_vec_push(&p->func->labels, &ip.idx);
|
|
bc_parse_startBody(p, BC_PARSE_FLAG_IF);
|
|
|
|
return BC_STATUS_SUCCESS;
|
|
}
|
|
|
|
static BcStatus bc_parse_else(BcParse *p)
|
|
{
|
|
BcInstPtr ip;
|
|
|
|
if (!BC_PARSE_IF_END(p)) return bc_error_bad_token();
|
|
|
|
ip.idx = p->func->labels.len;
|
|
ip.func = ip.len = 0;
|
|
|
|
bc_parse_push(p, BC_INST_JUMP);
|
|
bc_parse_pushIndex(p, ip.idx);
|
|
|
|
bc_parse_noElse(p);
|
|
|
|
bc_vec_push(&p->exits, &ip);
|
|
bc_vec_push(&p->func->labels, &ip.idx);
|
|
bc_parse_startBody(p, BC_PARSE_FLAG_ELSE);
|
|
|
|
return bc_lex_next(&p->l);
|
|
}
|
|
|
|
static BcStatus bc_parse_while(BcParse *p)
|
|
{
|
|
BcStatus s;
|
|
BcInstPtr ip;
|
|
|
|
s = bc_lex_next(&p->l);
|
|
if (s) return s;
|
|
if (p->l.t.t != BC_LEX_LPAREN) return bc_error_bad_token();
|
|
s = bc_lex_next(&p->l);
|
|
if (s) return s;
|
|
|
|
ip.idx = p->func->labels.len;
|
|
|
|
bc_vec_push(&p->func->labels, &p->func->code.len);
|
|
bc_vec_push(&p->conds, &ip.idx);
|
|
|
|
ip.idx = p->func->labels.len;
|
|
ip.func = 1;
|
|
ip.len = 0;
|
|
|
|
bc_vec_push(&p->exits, &ip);
|
|
bc_vec_push(&p->func->labels, &ip.idx);
|
|
|
|
s = bc_parse_expr(p, BC_PARSE_REL, bc_parse_next_rel);
|
|
if (s) return s;
|
|
if (p->l.t.t != BC_LEX_RPAREN) return bc_error_bad_token();
|
|
s = bc_lex_next(&p->l);
|
|
if (s) return s;
|
|
|
|
bc_parse_push(p, BC_INST_JUMP_ZERO);
|
|
bc_parse_pushIndex(p, ip.idx);
|
|
bc_parse_startBody(p, BC_PARSE_FLAG_LOOP | BC_PARSE_FLAG_LOOP_INNER);
|
|
|
|
return BC_STATUS_SUCCESS;
|
|
}
|
|
|
|
static BcStatus bc_parse_for(BcParse *p)
|
|
{
|
|
BcStatus s;
|
|
BcInstPtr ip;
|
|
size_t cond_idx, exit_idx, body_idx, update_idx;
|
|
|
|
s = bc_lex_next(&p->l);
|
|
if (s) return s;
|
|
if (p->l.t.t != BC_LEX_LPAREN) return bc_error_bad_token();
|
|
s = bc_lex_next(&p->l);
|
|
if (s) return s;
|
|
|
|
if (p->l.t.t != BC_LEX_SCOLON)
|
|
s = bc_parse_expr(p, 0, bc_parse_next_for);
|
|
else
|
|
s = bc_POSIX_does_not_allow_empty_X_expression_in_for("init");
|
|
|
|
if (s) return s;
|
|
if (p->l.t.t != BC_LEX_SCOLON) return bc_error_bad_token();
|
|
s = bc_lex_next(&p->l);
|
|
if (s) return s;
|
|
|
|
cond_idx = p->func->labels.len;
|
|
update_idx = cond_idx + 1;
|
|
body_idx = update_idx + 1;
|
|
exit_idx = body_idx + 1;
|
|
|
|
bc_vec_push(&p->func->labels, &p->func->code.len);
|
|
|
|
if (p->l.t.t != BC_LEX_SCOLON)
|
|
s = bc_parse_expr(p, BC_PARSE_REL, bc_parse_next_for);
|
|
else
|
|
s = bc_POSIX_does_not_allow_empty_X_expression_in_for("condition");
|
|
|
|
if (s) return s;
|
|
if (p->l.t.t != BC_LEX_SCOLON) return bc_error_bad_token();
|
|
|
|
s = bc_lex_next(&p->l);
|
|
if (s) return s;
|
|
|
|
bc_parse_push(p, BC_INST_JUMP_ZERO);
|
|
bc_parse_pushIndex(p, exit_idx);
|
|
bc_parse_push(p, BC_INST_JUMP);
|
|
bc_parse_pushIndex(p, body_idx);
|
|
|
|
ip.idx = p->func->labels.len;
|
|
|
|
bc_vec_push(&p->conds, &update_idx);
|
|
bc_vec_push(&p->func->labels, &p->func->code.len);
|
|
|
|
if (p->l.t.t != BC_LEX_RPAREN)
|
|
s = bc_parse_expr(p, 0, bc_parse_next_rel);
|
|
else
|
|
s = bc_POSIX_does_not_allow_empty_X_expression_in_for("update");
|
|
|
|
if (s) return s;
|
|
|
|
if (p->l.t.t != BC_LEX_RPAREN) return bc_error_bad_token();
|
|
bc_parse_push(p, BC_INST_JUMP);
|
|
bc_parse_pushIndex(p, cond_idx);
|
|
bc_vec_push(&p->func->labels, &p->func->code.len);
|
|
|
|
ip.idx = exit_idx;
|
|
ip.func = 1;
|
|
ip.len = 0;
|
|
|
|
bc_vec_push(&p->exits, &ip);
|
|
bc_vec_push(&p->func->labels, &ip.idx);
|
|
bc_lex_next(&p->l);
|
|
bc_parse_startBody(p, BC_PARSE_FLAG_LOOP | BC_PARSE_FLAG_LOOP_INNER);
|
|
|
|
return BC_STATUS_SUCCESS;
|
|
}
|
|
|
|
static BcStatus bc_parse_loopExit(BcParse *p, BcLexType type)
|
|
{
|
|
BcStatus s;
|
|
size_t i;
|
|
BcInstPtr *ip;
|
|
|
|
if (!BC_PARSE_LOOP(p)) return bc_error_bad_token();
|
|
|
|
if (type == BC_LEX_KEY_BREAK) {
|
|
|
|
if (p->exits.len == 0) return bc_error_bad_token();
|
|
|
|
i = p->exits.len - 1;
|
|
ip = bc_vec_item(&p->exits, i);
|
|
|
|
while (!ip->func && i < p->exits.len) ip = bc_vec_item(&p->exits, i--);
|
|
if (i >= p->exits.len && !ip->func) return bc_error_bad_token();
|
|
|
|
i = ip->idx;
|
|
}
|
|
else
|
|
i = *((size_t *) bc_vec_top(&p->conds));
|
|
|
|
bc_parse_push(p, BC_INST_JUMP);
|
|
bc_parse_pushIndex(p, i);
|
|
|
|
s = bc_lex_next(&p->l);
|
|
if (s) return s;
|
|
|
|
if (p->l.t.t != BC_LEX_SCOLON && p->l.t.t != BC_LEX_NLINE)
|
|
return bc_error_bad_token();
|
|
|
|
return bc_lex_next(&p->l);
|
|
}
|
|
|
|
static BcStatus bc_parse_func(BcParse *p)
|
|
{
|
|
BcStatus s;
|
|
bool var, comma = false;
|
|
uint8_t flags;
|
|
char *name;
|
|
|
|
s = bc_lex_next(&p->l);
|
|
if (s) return s;
|
|
if (p->l.t.t != BC_LEX_NAME)
|
|
return bc_error("bad function definition");
|
|
|
|
name = xstrdup(p->l.t.v.v);
|
|
bc_parse_addFunc(p, name, &p->fidx);
|
|
|
|
s = bc_lex_next(&p->l);
|
|
if (s) return s;
|
|
if (p->l.t.t != BC_LEX_LPAREN)
|
|
return bc_error("bad function definition");
|
|
s = bc_lex_next(&p->l);
|
|
if (s) return s;
|
|
|
|
while (p->l.t.t != BC_LEX_RPAREN) {
|
|
|
|
if (p->l.t.t != BC_LEX_NAME)
|
|
return bc_error("bad function definition");
|
|
|
|
++p->func->nparams;
|
|
|
|
name = xstrdup(p->l.t.v.v);
|
|
s = bc_lex_next(&p->l);
|
|
if (s) goto err;
|
|
|
|
var = p->l.t.t != BC_LEX_LBRACKET;
|
|
|
|
if (!var) {
|
|
|
|
s = bc_lex_next(&p->l);
|
|
if (s) goto err;
|
|
|
|
if (p->l.t.t != BC_LEX_RBRACKET) {
|
|
s = bc_error("bad function definition");
|
|
goto err;
|
|
}
|
|
|
|
s = bc_lex_next(&p->l);
|
|
if (s) goto err;
|
|
}
|
|
|
|
comma = p->l.t.t == BC_LEX_COMMA;
|
|
if (comma) {
|
|
s = bc_lex_next(&p->l);
|
|
if (s) goto err;
|
|
}
|
|
|
|
s = bc_func_insert(p->func, name, var);
|
|
if (s) goto err;
|
|
}
|
|
|
|
if (comma) return bc_error("bad function definition");
|
|
|
|
flags = BC_PARSE_FLAG_FUNC | BC_PARSE_FLAG_FUNC_INNER | BC_PARSE_FLAG_BODY;
|
|
bc_parse_startBody(p, flags);
|
|
|
|
s = bc_lex_next(&p->l);
|
|
if (s) return s;
|
|
|
|
if (p->l.t.t != BC_LEX_LBRACE)
|
|
s = bc_POSIX_requires("the left brace be on the same line as the function header");
|
|
|
|
return s;
|
|
|
|
err:
|
|
free(name);
|
|
return s;
|
|
}
|
|
|
|
static BcStatus bc_parse_auto(BcParse *p)
|
|
{
|
|
BcStatus s;
|
|
bool comma, var, one;
|
|
char *name;
|
|
|
|
if (!p->auto_part) return bc_error_bad_token();
|
|
s = bc_lex_next(&p->l);
|
|
if (s) return s;
|
|
|
|
p->auto_part = comma = false;
|
|
one = p->l.t.t == BC_LEX_NAME;
|
|
|
|
while (p->l.t.t == BC_LEX_NAME) {
|
|
|
|
name = xstrdup(p->l.t.v.v);
|
|
s = bc_lex_next(&p->l);
|
|
if (s) goto err;
|
|
|
|
var = p->l.t.t != BC_LEX_LBRACKET;
|
|
if (!var) {
|
|
|
|
s = bc_lex_next(&p->l);
|
|
if (s) goto err;
|
|
|
|
if (p->l.t.t != BC_LEX_RBRACKET) {
|
|
s = bc_error("bad function definition");
|
|
goto err;
|
|
}
|
|
|
|
s = bc_lex_next(&p->l);
|
|
if (s) goto err;
|
|
}
|
|
|
|
comma = p->l.t.t == BC_LEX_COMMA;
|
|
if (comma) {
|
|
s = bc_lex_next(&p->l);
|
|
if (s) goto err;
|
|
}
|
|
|
|
s = bc_func_insert(p->func, name, var);
|
|
if (s) goto err;
|
|
}
|
|
|
|
if (comma) return bc_error("bad function definition");
|
|
if (!one) return bc_error("no auto variable found");
|
|
|
|
if (p->l.t.t != BC_LEX_NLINE && p->l.t.t != BC_LEX_SCOLON)
|
|
return bc_error_bad_token();
|
|
|
|
return bc_lex_next(&p->l);
|
|
|
|
err:
|
|
free(name);
|
|
return s;
|
|
}
|
|
|
|
static BcStatus bc_parse_body(BcParse *p, bool brace)
|
|
{
|
|
BcStatus s = BC_STATUS_SUCCESS;
|
|
uint8_t *flag_ptr = bc_vec_top(&p->flags);
|
|
|
|
*flag_ptr &= ~(BC_PARSE_FLAG_BODY);
|
|
|
|
if (*flag_ptr & BC_PARSE_FLAG_FUNC_INNER) {
|
|
|
|
if (!brace) return bc_error_bad_token();
|
|
p->auto_part = p->l.t.t != BC_LEX_KEY_AUTO;
|
|
|
|
if (!p->auto_part) {
|
|
s = bc_parse_auto(p);
|
|
if (s) return s;
|
|
}
|
|
|
|
if (p->l.t.t == BC_LEX_NLINE) s = bc_lex_next(&p->l);
|
|
}
|
|
else {
|
|
s = bc_parse_stmt(p);
|
|
if (!s && !brace) s = bc_parse_endBody(p, false);
|
|
}
|
|
|
|
return s;
|
|
}
|
|
|
|
static BcStatus bc_parse_stmt(BcParse *p)
|
|
{
|
|
BcStatus s = BC_STATUS_SUCCESS;
|
|
|
|
switch (p->l.t.t) {
|
|
|
|
case BC_LEX_NLINE:
|
|
{
|
|
return bc_lex_next(&p->l);
|
|
}
|
|
|
|
case BC_LEX_KEY_ELSE:
|
|
{
|
|
p->auto_part = false;
|
|
break;
|
|
}
|
|
|
|
case BC_LEX_LBRACE:
|
|
{
|
|
if (!BC_PARSE_BODY(p)) return bc_error_bad_token();
|
|
|
|
++p->nbraces;
|
|
s = bc_lex_next(&p->l);
|
|
if (s) return s;
|
|
|
|
return bc_parse_body(p, true);
|
|
}
|
|
|
|
case BC_LEX_KEY_AUTO:
|
|
{
|
|
return bc_parse_auto(p);
|
|
}
|
|
|
|
default:
|
|
{
|
|
p->auto_part = false;
|
|
|
|
if (BC_PARSE_IF_END(p)) {
|
|
bc_parse_noElse(p);
|
|
return BC_STATUS_SUCCESS;
|
|
}
|
|
else if (BC_PARSE_BODY(p))
|
|
return bc_parse_body(p, false);
|
|
|
|
break;
|
|
}
|
|
}
|
|
|
|
switch (p->l.t.t) {
|
|
|
|
case BC_LEX_OP_INC:
|
|
case BC_LEX_OP_DEC:
|
|
case BC_LEX_OP_MINUS:
|
|
case BC_LEX_OP_BOOL_NOT:
|
|
case BC_LEX_LPAREN:
|
|
case BC_LEX_NAME:
|
|
case BC_LEX_NUMBER:
|
|
case BC_LEX_KEY_IBASE:
|
|
case BC_LEX_KEY_LAST:
|
|
case BC_LEX_KEY_LENGTH:
|
|
case BC_LEX_KEY_OBASE:
|
|
case BC_LEX_KEY_READ:
|
|
case BC_LEX_KEY_SCALE:
|
|
case BC_LEX_KEY_SQRT:
|
|
{
|
|
s = bc_parse_expr(p, BC_PARSE_PRINT, bc_parse_next_expr);
|
|
break;
|
|
}
|
|
|
|
case BC_LEX_KEY_ELSE:
|
|
{
|
|
s = bc_parse_else(p);
|
|
break;
|
|
}
|
|
|
|
case BC_LEX_SCOLON:
|
|
{
|
|
while (!s && p->l.t.t == BC_LEX_SCOLON) s = bc_lex_next(&p->l);
|
|
break;
|
|
}
|
|
|
|
case BC_LEX_RBRACE:
|
|
{
|
|
s = bc_parse_endBody(p, true);
|
|
break;
|
|
}
|
|
|
|
case BC_LEX_STR:
|
|
{
|
|
s = bc_parse_string(p, BC_INST_PRINT_STR);
|
|
break;
|
|
}
|
|
|
|
case BC_LEX_KEY_BREAK:
|
|
case BC_LEX_KEY_CONTINUE:
|
|
{
|
|
s = bc_parse_loopExit(p, p->l.t.t);
|
|
break;
|
|
}
|
|
|
|
case BC_LEX_KEY_FOR:
|
|
{
|
|
s = bc_parse_for(p);
|
|
break;
|
|
}
|
|
|
|
case BC_LEX_KEY_HALT:
|
|
{
|
|
bc_parse_push(p, BC_INST_HALT);
|
|
s = bc_lex_next(&p->l);
|
|
break;
|
|
}
|
|
|
|
case BC_LEX_KEY_IF:
|
|
{
|
|
s = bc_parse_if(p);
|
|
break;
|
|
}
|
|
|
|
case BC_LEX_KEY_LIMITS:
|
|
{
|
|
// "limits" is a compile-time command,
|
|
// the output is produced at _parse time_.
|
|
s = bc_lex_next(&p->l);
|
|
if (s) return s;
|
|
printf(
|
|
"BC_BASE_MAX = "BC_MAX_OBASE_STR "\n"
|
|
"BC_DIM_MAX = "BC_MAX_DIM_STR "\n"
|
|
"BC_SCALE_MAX = "BC_MAX_SCALE_STR "\n"
|
|
"BC_STRING_MAX = "BC_MAX_STRING_STR"\n"
|
|
"BC_NAME_MAX = "BC_MAX_NAME_STR "\n"
|
|
"BC_NUM_MAX = "BC_MAX_NUM_STR "\n"
|
|
"MAX Exponent = "BC_MAX_EXP_STR "\n"
|
|
"Number of vars = "BC_MAX_VARS_STR "\n"
|
|
);
|
|
break;
|
|
}
|
|
|
|
case BC_LEX_KEY_PRINT:
|
|
{
|
|
s = bc_parse_print(p);
|
|
break;
|
|
}
|
|
|
|
case BC_LEX_KEY_QUIT:
|
|
{
|
|
// "quit" is a compile-time command. For example,
|
|
// "if (0 == 1) quit" terminates when parsing the statement,
|
|
// not when it is executed
|
|
QUIT_OR_RETURN_TO_MAIN;
|
|
}
|
|
|
|
case BC_LEX_KEY_RETURN:
|
|
{
|
|
s = bc_parse_return(p);
|
|
break;
|
|
}
|
|
|
|
case BC_LEX_KEY_WHILE:
|
|
{
|
|
s = bc_parse_while(p);
|
|
break;
|
|
}
|
|
|
|
default:
|
|
{
|
|
s = bc_error_bad_token();
|
|
break;
|
|
}
|
|
}
|
|
|
|
return s;
|
|
}
|
|
|
|
static BcStatus bc_parse_parse(BcParse *p)
|
|
{
|
|
BcStatus s;
|
|
|
|
if (p->l.t.t == BC_LEX_EOF)
|
|
s = p->flags.len > 0 ? bc_error("block end could not be found") : bc_error("end of file");
|
|
else if (p->l.t.t == BC_LEX_KEY_DEFINE) {
|
|
if (!BC_PARSE_CAN_EXEC(p)) return bc_error_bad_token();
|
|
s = bc_parse_func(p);
|
|
}
|
|
else
|
|
s = bc_parse_stmt(p);
|
|
|
|
if (s || G_interrupt) {
|
|
bc_parse_reset(p);
|
|
s = BC_STATUS_FAILURE;
|
|
}
|
|
|
|
return s;
|
|
}
|
|
|
|
static BcStatus bc_parse_expr_empty_ok(BcParse *p, uint8_t flags, BcParseNext next)
|
|
{
|
|
BcStatus s = BC_STATUS_SUCCESS;
|
|
BcInst prev = BC_INST_PRINT;
|
|
BcLexType top, t = p->l.t.t;
|
|
size_t nexprs = 0, ops_bgn = p->ops.len;
|
|
unsigned nparens, nrelops;
|
|
bool paren_first, paren_expr, rprn, done, get_token, assign, bin_last;
|
|
|
|
paren_first = p->l.t.t == BC_LEX_LPAREN;
|
|
nparens = nrelops = 0;
|
|
paren_expr = rprn = done = get_token = assign = false;
|
|
bin_last = true;
|
|
|
|
for (; !G_interrupt && !s && !done && bc_parse_exprs(t); t = p->l.t.t) {
|
|
switch (t) {
|
|
|
|
case BC_LEX_OP_INC:
|
|
case BC_LEX_OP_DEC:
|
|
{
|
|
s = bc_parse_incdec(p, &prev, &paren_expr, &nexprs, flags);
|
|
rprn = get_token = bin_last = false;
|
|
break;
|
|
}
|
|
|
|
case BC_LEX_OP_MINUS:
|
|
{
|
|
s = bc_parse_minus(p, &prev, ops_bgn, rprn, &nexprs);
|
|
rprn = get_token = false;
|
|
bin_last = prev == BC_INST_MINUS;
|
|
break;
|
|
}
|
|
|
|
case BC_LEX_OP_ASSIGN_POWER:
|
|
case BC_LEX_OP_ASSIGN_MULTIPLY:
|
|
case BC_LEX_OP_ASSIGN_DIVIDE:
|
|
case BC_LEX_OP_ASSIGN_MODULUS:
|
|
case BC_LEX_OP_ASSIGN_PLUS:
|
|
case BC_LEX_OP_ASSIGN_MINUS:
|
|
case BC_LEX_OP_ASSIGN:
|
|
{
|
|
if (prev != BC_INST_VAR && prev != BC_INST_ARRAY_ELEM &&
|
|
prev != BC_INST_SCALE && prev != BC_INST_IBASE &&
|
|
prev != BC_INST_OBASE && prev != BC_INST_LAST)
|
|
{
|
|
s = bc_error("bad assignment:"
|
|
" left side must be scale,"
|
|
" ibase, obase, last, var,"
|
|
" or array element"
|
|
);
|
|
break;
|
|
}
|
|
}
|
|
// Fallthrough.
|
|
case BC_LEX_OP_POWER:
|
|
case BC_LEX_OP_MULTIPLY:
|
|
case BC_LEX_OP_DIVIDE:
|
|
case BC_LEX_OP_MODULUS:
|
|
case BC_LEX_OP_PLUS:
|
|
case BC_LEX_OP_REL_EQ:
|
|
case BC_LEX_OP_REL_LE:
|
|
case BC_LEX_OP_REL_GE:
|
|
case BC_LEX_OP_REL_NE:
|
|
case BC_LEX_OP_REL_LT:
|
|
case BC_LEX_OP_REL_GT:
|
|
case BC_LEX_OP_BOOL_NOT:
|
|
case BC_LEX_OP_BOOL_OR:
|
|
case BC_LEX_OP_BOOL_AND:
|
|
{
|
|
if (((t == BC_LEX_OP_BOOL_NOT) != bin_last)
|
|
|| (t != BC_LEX_OP_BOOL_NOT && prev == BC_INST_BOOL_NOT)
|
|
) {
|
|
return bc_error_bad_expression();
|
|
}
|
|
|
|
nrelops += t >= BC_LEX_OP_REL_EQ && t <= BC_LEX_OP_REL_GT;
|
|
prev = BC_PARSE_TOKEN_INST(t);
|
|
s = bc_parse_operator(p, t, ops_bgn, &nexprs, true);
|
|
rprn = get_token = false;
|
|
bin_last = t != BC_LEX_OP_BOOL_NOT;
|
|
|
|
break;
|
|
}
|
|
|
|
case BC_LEX_LPAREN:
|
|
{
|
|
if (BC_PARSE_LEAF(prev, rprn))
|
|
return bc_error_bad_expression();
|
|
++nparens;
|
|
paren_expr = rprn = bin_last = false;
|
|
get_token = true;
|
|
bc_vec_push(&p->ops, &t);
|
|
|
|
break;
|
|
}
|
|
|
|
case BC_LEX_RPAREN:
|
|
{
|
|
if (bin_last || prev == BC_INST_BOOL_NOT)
|
|
return bc_error_bad_expression();
|
|
|
|
if (nparens == 0) {
|
|
s = BC_STATUS_SUCCESS;
|
|
done = true;
|
|
get_token = false;
|
|
break;
|
|
}
|
|
else if (!paren_expr)
|
|
return BC_STATUS_PARSE_EMPTY_EXP;
|
|
|
|
--nparens;
|
|
paren_expr = rprn = true;
|
|
get_token = bin_last = false;
|
|
|
|
s = bc_parse_rightParen(p, ops_bgn, &nexprs);
|
|
|
|
break;
|
|
}
|
|
|
|
case BC_LEX_NAME:
|
|
{
|
|
if (BC_PARSE_LEAF(prev, rprn))
|
|
return bc_error_bad_expression();
|
|
paren_expr = true;
|
|
rprn = get_token = bin_last = false;
|
|
s = bc_parse_name(p, &prev, flags & ~BC_PARSE_NOCALL);
|
|
++nexprs;
|
|
|
|
break;
|
|
}
|
|
|
|
case BC_LEX_NUMBER:
|
|
{
|
|
if (BC_PARSE_LEAF(prev, rprn))
|
|
return bc_error_bad_expression();
|
|
bc_parse_number(p, &prev, &nexprs);
|
|
paren_expr = get_token = true;
|
|
rprn = bin_last = false;
|
|
|
|
break;
|
|
}
|
|
|
|
case BC_LEX_KEY_IBASE:
|
|
case BC_LEX_KEY_LAST:
|
|
case BC_LEX_KEY_OBASE:
|
|
{
|
|
if (BC_PARSE_LEAF(prev, rprn))
|
|
return bc_error_bad_expression();
|
|
prev = (char) (t - BC_LEX_KEY_IBASE + BC_INST_IBASE);
|
|
bc_parse_push(p, (char) prev);
|
|
|
|
paren_expr = get_token = true;
|
|
rprn = bin_last = false;
|
|
++nexprs;
|
|
|
|
break;
|
|
}
|
|
|
|
case BC_LEX_KEY_LENGTH:
|
|
case BC_LEX_KEY_SQRT:
|
|
{
|
|
if (BC_PARSE_LEAF(prev, rprn))
|
|
return bc_error_bad_expression();
|
|
s = bc_parse_builtin(p, t, flags, &prev);
|
|
paren_expr = true;
|
|
rprn = get_token = bin_last = false;
|
|
++nexprs;
|
|
|
|
break;
|
|
}
|
|
|
|
case BC_LEX_KEY_READ:
|
|
{
|
|
if (BC_PARSE_LEAF(prev, rprn))
|
|
return bc_error_bad_expression();
|
|
else if (flags & BC_PARSE_NOREAD)
|
|
s = bc_error_nested_read_call();
|
|
else
|
|
s = bc_parse_read(p);
|
|
|
|
paren_expr = true;
|
|
rprn = get_token = bin_last = false;
|
|
++nexprs;
|
|
prev = BC_INST_READ;
|
|
|
|
break;
|
|
}
|
|
|
|
case BC_LEX_KEY_SCALE:
|
|
{
|
|
if (BC_PARSE_LEAF(prev, rprn))
|
|
return bc_error_bad_expression();
|
|
s = bc_parse_scale(p, &prev, flags);
|
|
paren_expr = true;
|
|
rprn = get_token = bin_last = false;
|
|
++nexprs;
|
|
prev = BC_INST_SCALE;
|
|
|
|
break;
|
|
}
|
|
|
|
default:
|
|
{
|
|
s = bc_error_bad_token();
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!s && get_token) s = bc_lex_next(&p->l);
|
|
}
|
|
|
|
if (s) return s;
|
|
if (G_interrupt) return BC_STATUS_FAILURE; // ^C: stop parsing
|
|
|
|
while (p->ops.len > ops_bgn) {
|
|
|
|
top = BC_PARSE_TOP_OP(p);
|
|
assign = top >= BC_LEX_OP_ASSIGN_POWER && top <= BC_LEX_OP_ASSIGN;
|
|
|
|
if (top == BC_LEX_LPAREN || top == BC_LEX_RPAREN)
|
|
return bc_error_bad_expression();
|
|
|
|
bc_parse_push(p, BC_PARSE_TOKEN_INST(top));
|
|
|
|
nexprs -= top != BC_LEX_OP_BOOL_NOT && top != BC_LEX_NEG;
|
|
bc_vec_pop(&p->ops);
|
|
}
|
|
|
|
if (prev == BC_INST_BOOL_NOT || nexprs != 1)
|
|
return bc_error_bad_expression();
|
|
|
|
// next is BcParseNext, byte array of up to 4 BC_LEX's, packed into 32-bit word
|
|
for (;;) {
|
|
if (t == (next & 0x7f))
|
|
goto ok;
|
|
if (next & 0x80) // last element?
|
|
break;
|
|
next >>= 8;
|
|
}
|
|
return bc_error_bad_expression();
|
|
ok:
|
|
|
|
if (!(flags & BC_PARSE_REL) && nrelops) {
|
|
s = bc_POSIX_does_not_allow("comparison operators outside if or loops");
|
|
if (s) return s;
|
|
}
|
|
else if ((flags & BC_PARSE_REL) && nrelops > 1) {
|
|
s = bc_POSIX_requires("exactly one comparison operator per condition");
|
|
if (s) return s;
|
|
}
|
|
|
|
if (flags & BC_PARSE_PRINT) {
|
|
if (paren_first || !assign) bc_parse_push(p, BC_INST_PRINT);
|
|
bc_parse_push(p, BC_INST_POP);
|
|
}
|
|
|
|
return s;
|
|
}
|
|
|
|
static BcStatus bc_parse_expr(BcParse *p, uint8_t flags, BcParseNext next)
|
|
{
|
|
BcStatus s;
|
|
|
|
s = bc_parse_expr_empty_ok(p, flags, next);
|
|
if (s == BC_STATUS_PARSE_EMPTY_EXP)
|
|
return bc_error("empty expression");
|
|
return s;
|
|
}
|
|
|
|
static void bc_parse_init(BcParse *p, size_t func)
|
|
{
|
|
bc_parse_create(p, func, bc_parse_parse, bc_lex_token);
|
|
}
|
|
|
|
static BcStatus bc_parse_expression(BcParse *p, uint8_t flags)
|
|
{
|
|
return bc_parse_expr(p, flags, bc_parse_next_read);
|
|
}
|
|
|
|
#endif // ENABLE_BC
|
|
|
|
#if ENABLE_DC
|
|
|
|
#define DC_PARSE_BUF_LEN ((int) (sizeof(uint32_t) * CHAR_BIT))
|
|
|
|
static BcStatus dc_parse_register(BcParse *p)
|
|
{
|
|
BcStatus s;
|
|
char *name;
|
|
|
|
s = bc_lex_next(&p->l);
|
|
if (s) return s;
|
|
if (p->l.t.t != BC_LEX_NAME) return bc_error_bad_token();
|
|
|
|
name = xstrdup(p->l.t.v.v);
|
|
bc_parse_pushName(p, name);
|
|
|
|
return s;
|
|
}
|
|
|
|
static BcStatus dc_parse_string(BcParse *p)
|
|
{
|
|
char *str, *name, b[DC_PARSE_BUF_LEN + 1];
|
|
size_t idx, len = G.prog.strs.len;
|
|
|
|
sprintf(b, "%0*zu", DC_PARSE_BUF_LEN, len);
|
|
name = xstrdup(b);
|
|
|
|
str = xstrdup(p->l.t.v.v);
|
|
bc_parse_push(p, BC_INST_STR);
|
|
bc_parse_pushIndex(p, len);
|
|
bc_vec_push(&G.prog.strs, &str);
|
|
bc_parse_addFunc(p, name, &idx);
|
|
|
|
return bc_lex_next(&p->l);
|
|
}
|
|
|
|
static BcStatus dc_parse_mem(BcParse *p, uint8_t inst, bool name, bool store)
|
|
{
|
|
BcStatus s;
|
|
|
|
bc_parse_push(p, inst);
|
|
if (name) {
|
|
s = dc_parse_register(p);
|
|
if (s) return s;
|
|
}
|
|
|
|
if (store) {
|
|
bc_parse_push(p, BC_INST_SWAP);
|
|
bc_parse_push(p, BC_INST_ASSIGN);
|
|
bc_parse_push(p, BC_INST_POP);
|
|
}
|
|
|
|
return bc_lex_next(&p->l);
|
|
}
|
|
|
|
static BcStatus dc_parse_cond(BcParse *p, uint8_t inst)
|
|
{
|
|
BcStatus s;
|
|
|
|
bc_parse_push(p, inst);
|
|
bc_parse_push(p, BC_INST_EXEC_COND);
|
|
|
|
s = dc_parse_register(p);
|
|
if (s) return s;
|
|
|
|
s = bc_lex_next(&p->l);
|
|
if (s) return s;
|
|
|
|
if (p->l.t.t == BC_LEX_ELSE) {
|
|
s = dc_parse_register(p);
|
|
if (s) return s;
|
|
s = bc_lex_next(&p->l);
|
|
}
|
|
else
|
|
bc_parse_push(p, BC_PARSE_STREND);
|
|
|
|
return s;
|
|
}
|
|
|
|
static BcStatus dc_parse_token(BcParse *p, BcLexType t, uint8_t flags)
|
|
{
|
|
BcStatus s = BC_STATUS_SUCCESS;
|
|
BcInst prev;
|
|
uint8_t inst;
|
|
bool assign, get_token = false;
|
|
|
|
switch (t) {
|
|
|
|
case BC_LEX_OP_REL_EQ:
|
|
case BC_LEX_OP_REL_LE:
|
|
case BC_LEX_OP_REL_GE:
|
|
case BC_LEX_OP_REL_NE:
|
|
case BC_LEX_OP_REL_LT:
|
|
case BC_LEX_OP_REL_GT:
|
|
{
|
|
s = dc_parse_cond(p, t - BC_LEX_OP_REL_EQ + BC_INST_REL_EQ);
|
|
break;
|
|
}
|
|
|
|
case BC_LEX_SCOLON:
|
|
case BC_LEX_COLON:
|
|
{
|
|
s = dc_parse_mem(p, BC_INST_ARRAY_ELEM, true, t == BC_LEX_COLON);
|
|
break;
|
|
}
|
|
|
|
case BC_LEX_STR:
|
|
{
|
|
s = dc_parse_string(p);
|
|
break;
|
|
}
|
|
|
|
case BC_LEX_NEG:
|
|
case BC_LEX_NUMBER:
|
|
{
|
|
if (t == BC_LEX_NEG) {
|
|
s = bc_lex_next(&p->l);
|
|
if (s) return s;
|
|
if (p->l.t.t != BC_LEX_NUMBER)
|
|
return bc_error_bad_token();
|
|
}
|
|
|
|
bc_parse_number(p, &prev, &p->nbraces);
|
|
|
|
if (t == BC_LEX_NEG) bc_parse_push(p, BC_INST_NEG);
|
|
get_token = true;
|
|
|
|
break;
|
|
}
|
|
|
|
case BC_LEX_KEY_READ:
|
|
{
|
|
if (flags & BC_PARSE_NOREAD)
|
|
s = bc_error_nested_read_call();
|
|
else
|
|
bc_parse_push(p, BC_INST_READ);
|
|
get_token = true;
|
|
break;
|
|
}
|
|
|
|
case BC_LEX_OP_ASSIGN:
|
|
case BC_LEX_STORE_PUSH:
|
|
{
|
|
assign = t == BC_LEX_OP_ASSIGN;
|
|
inst = assign ? BC_INST_VAR : BC_INST_PUSH_TO_VAR;
|
|
s = dc_parse_mem(p, inst, true, assign);
|
|
break;
|
|
}
|
|
|
|
case BC_LEX_LOAD:
|
|
case BC_LEX_LOAD_POP:
|
|
{
|
|
inst = t == BC_LEX_LOAD_POP ? BC_INST_PUSH_VAR : BC_INST_LOAD;
|
|
s = dc_parse_mem(p, inst, true, false);
|
|
break;
|
|
}
|
|
|
|
case BC_LEX_STORE_IBASE:
|
|
case BC_LEX_STORE_SCALE:
|
|
case BC_LEX_STORE_OBASE:
|
|
{
|
|
inst = t - BC_LEX_STORE_IBASE + BC_INST_IBASE;
|
|
s = dc_parse_mem(p, inst, false, true);
|
|
break;
|
|
}
|
|
|
|
default:
|
|
{
|
|
s = bc_error_bad_token();
|
|
get_token = true;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!s && get_token) s = bc_lex_next(&p->l);
|
|
|
|
return s;
|
|
}
|
|
|
|
static BcStatus dc_parse_expr(BcParse *p, uint8_t flags)
|
|
{
|
|
BcStatus s = BC_STATUS_SUCCESS;
|
|
BcInst inst;
|
|
BcLexType t;
|
|
|
|
if (flags & BC_PARSE_NOCALL) p->nbraces = G.prog.results.len;
|
|
|
|
for (t = p->l.t.t; !s && t != BC_LEX_EOF; t = p->l.t.t) {
|
|
|
|
inst = dc_parse_insts[t];
|
|
|
|
if (inst != BC_INST_INVALID) {
|
|
bc_parse_push(p, inst);
|
|
s = bc_lex_next(&p->l);
|
|
}
|
|
else
|
|
s = dc_parse_token(p, t, flags);
|
|
}
|
|
|
|
if (!s && p->l.t.t == BC_LEX_EOF && (flags & BC_PARSE_NOCALL))
|
|
bc_parse_push(p, BC_INST_POP_EXEC);
|
|
|
|
return s;
|
|
}
|
|
|
|
static BcStatus dc_parse_parse(BcParse *p)
|
|
{
|
|
BcStatus s;
|
|
|
|
if (p->l.t.t == BC_LEX_EOF)
|
|
s = bc_error("end of file");
|
|
else
|
|
s = dc_parse_expr(p, 0);
|
|
|
|
if (s || G_interrupt) {
|
|
bc_parse_reset(p);
|
|
s = BC_STATUS_FAILURE;
|
|
}
|
|
|
|
return s;
|
|
}
|
|
|
|
static void dc_parse_init(BcParse *p, size_t func)
|
|
{
|
|
bc_parse_create(p, func, dc_parse_parse, dc_lex_token);
|
|
}
|
|
|
|
#endif // ENABLE_DC
|
|
|
|
static void common_parse_init(BcParse *p, size_t func)
|
|
{
|
|
if (IS_BC) {
|
|
IF_BC(bc_parse_init(p, func);)
|
|
} else {
|
|
IF_DC(dc_parse_init(p, func);)
|
|
}
|
|
}
|
|
|
|
static BcStatus common_parse_expr(BcParse *p, uint8_t flags)
|
|
{
|
|
if (IS_BC) {
|
|
IF_BC(return bc_parse_expression(p, flags);)
|
|
} else {
|
|
IF_DC(return dc_parse_expr(p, flags);)
|
|
}
|
|
}
|
|
|
|
static BcVec* bc_program_search(char *id, bool var)
|
|
{
|
|
BcId e, *ptr;
|
|
BcVec *v, *map;
|
|
size_t i;
|
|
BcResultData data;
|
|
int new;
|
|
|
|
v = var ? &G.prog.vars : &G.prog.arrs;
|
|
map = var ? &G.prog.var_map : &G.prog.arr_map;
|
|
|
|
e.name = id;
|
|
e.idx = v->len;
|
|
new = bc_map_insert(map, &e, &i); // 1 if insertion was successful
|
|
|
|
if (new) {
|
|
bc_array_init(&data.v, var);
|
|
bc_vec_push(v, &data.v);
|
|
}
|
|
|
|
ptr = bc_vec_item(map, i);
|
|
if (new) ptr->name = xstrdup(e.name);
|
|
return bc_vec_item(v, ptr->idx);
|
|
}
|
|
|
|
static BcStatus bc_program_num(BcResult *r, BcNum **num, bool hex)
|
|
{
|
|
BcStatus s = BC_STATUS_SUCCESS;
|
|
|
|
switch (r->t) {
|
|
|
|
case BC_RESULT_STR:
|
|
case BC_RESULT_TEMP:
|
|
case BC_RESULT_IBASE:
|
|
case BC_RESULT_SCALE:
|
|
case BC_RESULT_OBASE:
|
|
{
|
|
*num = &r->d.n;
|
|
break;
|
|
}
|
|
|
|
case BC_RESULT_CONSTANT:
|
|
{
|
|
char **str = bc_vec_item(&G.prog.consts, r->d.id.idx);
|
|
size_t base_t, len = strlen(*str);
|
|
BcNum *base;
|
|
|
|
bc_num_init(&r->d.n, len);
|
|
|
|
hex = hex && len == 1;
|
|
base = hex ? &G.prog.hexb : &G.prog.ib;
|
|
base_t = hex ? BC_NUM_MAX_IBASE : G.prog.ib_t;
|
|
s = bc_num_parse(&r->d.n, *str, base, base_t);
|
|
|
|
if (s) {
|
|
bc_num_free(&r->d.n);
|
|
return s;
|
|
}
|
|
|
|
*num = &r->d.n;
|
|
r->t = BC_RESULT_TEMP;
|
|
|
|
break;
|
|
}
|
|
|
|
case BC_RESULT_VAR:
|
|
case BC_RESULT_ARRAY:
|
|
case BC_RESULT_ARRAY_ELEM:
|
|
{
|
|
BcVec *v;
|
|
|
|
v = bc_program_search(r->d.id.name, r->t == BC_RESULT_VAR);
|
|
|
|
if (r->t == BC_RESULT_ARRAY_ELEM) {
|
|
v = bc_vec_top(v);
|
|
if (v->len <= r->d.id.idx) bc_array_expand(v, r->d.id.idx + 1);
|
|
*num = bc_vec_item(v, r->d.id.idx);
|
|
}
|
|
else
|
|
*num = bc_vec_top(v);
|
|
|
|
break;
|
|
}
|
|
|
|
case BC_RESULT_LAST:
|
|
{
|
|
*num = &G.prog.last;
|
|
break;
|
|
}
|
|
|
|
case BC_RESULT_ONE:
|
|
{
|
|
*num = &G.prog.one;
|
|
break;
|
|
}
|
|
}
|
|
|
|
return s;
|
|
}
|
|
|
|
static BcStatus bc_program_binOpPrep(BcResult **l, BcNum **ln,
|
|
BcResult **r, BcNum **rn, bool assign)
|
|
{
|
|
BcStatus s;
|
|
bool hex;
|
|
BcResultType lt, rt;
|
|
|
|
if (!BC_PROG_STACK(&G.prog.results, 2))
|
|
return bc_error_stack_has_too_few_elements();
|
|
|
|
*r = bc_vec_item_rev(&G.prog.results, 0);
|
|
*l = bc_vec_item_rev(&G.prog.results, 1);
|
|
|
|
lt = (*l)->t;
|
|
rt = (*r)->t;
|
|
hex = assign && (lt == BC_RESULT_IBASE || lt == BC_RESULT_OBASE);
|
|
|
|
s = bc_program_num(*l, ln, false);
|
|
if (s) return s;
|
|
s = bc_program_num(*r, rn, hex);
|
|
if (s) return s;
|
|
|
|
// We run this again under these conditions in case any vector has been
|
|
// reallocated out from under the BcNums or arrays we had.
|
|
if (lt == rt && (lt == BC_RESULT_VAR || lt == BC_RESULT_ARRAY_ELEM)) {
|
|
s = bc_program_num(*l, ln, false);
|
|
if (s) return s;
|
|
}
|
|
|
|
if (!BC_PROG_NUM((*l), (*ln)) && (!assign || (*l)->t != BC_RESULT_VAR))
|
|
return bc_error_variable_is_wrong_type();
|
|
if (!assign && !BC_PROG_NUM((*r), (*ln)))
|
|
return bc_error_variable_is_wrong_type();
|
|
|
|
return s;
|
|
}
|
|
|
|
static void bc_program_binOpRetire(BcResult *r)
|
|
{
|
|
r->t = BC_RESULT_TEMP;
|
|
bc_vec_pop(&G.prog.results);
|
|
bc_vec_pop(&G.prog.results);
|
|
bc_vec_push(&G.prog.results, r);
|
|
}
|
|
|
|
static BcStatus bc_program_prep(BcResult **r, BcNum **n)
|
|
{
|
|
BcStatus s;
|
|
|
|
if (!BC_PROG_STACK(&G.prog.results, 1))
|
|
return bc_error_stack_has_too_few_elements();
|
|
*r = bc_vec_top(&G.prog.results);
|
|
|
|
s = bc_program_num(*r, n, false);
|
|
if (s) return s;
|
|
|
|
if (!BC_PROG_NUM((*r), (*n)))
|
|
return bc_error_variable_is_wrong_type();
|
|
|
|
return s;
|
|
}
|
|
|
|
static void bc_program_retire(BcResult *r, BcResultType t)
|
|
{
|
|
r->t = t;
|
|
bc_vec_pop(&G.prog.results);
|
|
bc_vec_push(&G.prog.results, r);
|
|
}
|
|
|
|
static BcStatus bc_program_op(char inst)
|
|
{
|
|
BcStatus s;
|
|
BcResult *opd1, *opd2, res;
|
|
BcNum *n1, *n2 = NULL;
|
|
|
|
s = bc_program_binOpPrep(&opd1, &n1, &opd2, &n2, false);
|
|
if (s) return s;
|
|
bc_num_init(&res.d.n, BC_NUM_DEF_SIZE);
|
|
|
|
s = bc_program_ops[inst - BC_INST_POWER](n1, n2, &res.d.n, G.prog.scale);
|
|
if (s) goto err;
|
|
bc_program_binOpRetire(&res);
|
|
|
|
return s;
|
|
|
|
err:
|
|
bc_num_free(&res.d.n);
|
|
return s;
|
|
}
|
|
|
|
static BcStatus bc_program_read(void)
|
|
{
|
|
const char *sv_file;
|
|
BcStatus s;
|
|
BcParse parse;
|
|
BcVec buf;
|
|
BcInstPtr ip;
|
|
size_t i;
|
|
BcFunc *f = bc_vec_item(&G.prog.fns, BC_PROG_READ);
|
|
|
|
for (i = 0; i < G.prog.stack.len; ++i) {
|
|
BcInstPtr *ip_ptr = bc_vec_item(&G.prog.stack, i);
|
|
if (ip_ptr->func == BC_PROG_READ)
|
|
return bc_error_nested_read_call();
|
|
}
|
|
|
|
bc_vec_pop_all(&f->code);
|
|
bc_char_vec_init(&buf);
|
|
|
|
sv_file = G.prog.file;
|
|
G.prog.file = NULL;
|
|
|
|
s = bc_read_line(&buf, "read> ");
|
|
if (s) goto io_err;
|
|
|
|
common_parse_init(&parse, BC_PROG_READ);
|
|
bc_lex_file(&parse.l);
|
|
|
|
s = bc_parse_text(&parse, buf.v);
|
|
if (s) goto exec_err;
|
|
s = common_parse_expr(&parse, BC_PARSE_NOREAD);
|
|
if (s) goto exec_err;
|
|
|
|
if (parse.l.t.t != BC_LEX_NLINE && parse.l.t.t != BC_LEX_EOF) {
|
|
s = bc_error("bad read() expression");
|
|
goto exec_err;
|
|
}
|
|
|
|
ip.func = BC_PROG_READ;
|
|
ip.idx = 0;
|
|
ip.len = G.prog.results.len;
|
|
|
|
// Update this pointer, just in case.
|
|
f = bc_vec_item(&G.prog.fns, BC_PROG_READ);
|
|
|
|
bc_vec_pushByte(&f->code, BC_INST_POP_EXEC);
|
|
bc_vec_push(&G.prog.stack, &ip);
|
|
|
|
exec_err:
|
|
G.prog.file = sv_file;
|
|
bc_parse_free(&parse);
|
|
io_err:
|
|
bc_vec_free(&buf);
|
|
return s;
|
|
}
|
|
|
|
static size_t bc_program_index(char *code, size_t *bgn)
|
|
{
|
|
char amt = code[(*bgn)++], i = 0;
|
|
size_t res = 0;
|
|
|
|
for (; i < amt; ++i, ++(*bgn))
|
|
res |= (((size_t)((int) code[*bgn]) & UCHAR_MAX) << (i * CHAR_BIT));
|
|
|
|
return res;
|
|
}
|
|
|
|
static char *bc_program_name(char *code, size_t *bgn)
|
|
{
|
|
size_t i;
|
|
char c, *s, *str = code + *bgn, *ptr = strchr(str, BC_PARSE_STREND);
|
|
|
|
s = xmalloc(ptr - str + 1);
|
|
c = code[(*bgn)++];
|
|
|
|
for (i = 0; c != 0 && c != BC_PARSE_STREND; c = code[(*bgn)++], ++i)
|
|
s[i] = c;
|
|
|
|
s[i] = '\0';
|
|
|
|
return s;
|
|
}
|
|
|
|
static void bc_program_printString(const char *str, size_t *nchars)
|
|
{
|
|
size_t i, len = strlen(str);
|
|
|
|
#if ENABLE_DC
|
|
if (len == 0) {
|
|
bb_putchar('\0');
|
|
return;
|
|
}
|
|
#endif
|
|
|
|
for (i = 0; i < len; ++i, ++(*nchars)) {
|
|
|
|
int c = str[i];
|
|
|
|
if (c != '\\' || i == len - 1)
|
|
bb_putchar(c);
|
|
else {
|
|
|
|
c = str[++i];
|
|
|
|
switch (c) {
|
|
|
|
case 'a':
|
|
{
|
|
bb_putchar('\a');
|
|
break;
|
|
}
|
|
|
|
case 'b':
|
|
{
|
|
bb_putchar('\b');
|
|
break;
|
|
}
|
|
|
|
case '\\':
|
|
case 'e':
|
|
{
|
|
bb_putchar('\\');
|
|
break;
|
|
}
|
|
|
|
case 'f':
|
|
{
|
|
bb_putchar('\f');
|
|
break;
|
|
}
|
|
|
|
case 'n':
|
|
{
|
|
bb_putchar('\n');
|
|
*nchars = SIZE_MAX;
|
|
break;
|
|
}
|
|
|
|
case 'r':
|
|
{
|
|
bb_putchar('\r');
|
|
break;
|
|
}
|
|
|
|
case 'q':
|
|
{
|
|
bb_putchar('"');
|
|
break;
|
|
}
|
|
|
|
case 't':
|
|
{
|
|
bb_putchar('\t');
|
|
break;
|
|
}
|
|
|
|
default:
|
|
{
|
|
// Just print the backslash and following character.
|
|
bb_putchar('\\');
|
|
++(*nchars);
|
|
bb_putchar(c);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static BcStatus bc_program_print(char inst, size_t idx)
|
|
{
|
|
BcStatus s = BC_STATUS_SUCCESS;
|
|
BcResult *r;
|
|
size_t len, i;
|
|
char *str;
|
|
BcNum *num = NULL;
|
|
bool pop = inst != BC_INST_PRINT;
|
|
|
|
if (!BC_PROG_STACK(&G.prog.results, idx + 1))
|
|
return bc_error_stack_has_too_few_elements();
|
|
|
|
r = bc_vec_item_rev(&G.prog.results, idx);
|
|
s = bc_program_num(r, &num, false);
|
|
if (s) return s;
|
|
|
|
if (BC_PROG_NUM(r, num)) {
|
|
s = bc_num_print(num, &G.prog.ob, G.prog.ob_t, !pop, &G.prog.nchars, G.prog.len);
|
|
if (!s) bc_num_copy(&G.prog.last, num);
|
|
}
|
|
else {
|
|
|
|
idx = (r->t == BC_RESULT_STR) ? r->d.id.idx : num->rdx;
|
|
str = *((char **) bc_vec_item(&G.prog.strs, idx));
|
|
|
|
if (inst == BC_INST_PRINT_STR) {
|
|
for (i = 0, len = strlen(str); i < len; ++i) {
|
|
char c = str[i];
|
|
bb_putchar(c);
|
|
if (c == '\n') G.prog.nchars = SIZE_MAX;
|
|
++G.prog.nchars;
|
|
}
|
|
}
|
|
else {
|
|
bc_program_printString(str, &G.prog.nchars);
|
|
if (inst == BC_INST_PRINT) bb_putchar('\n');
|
|
}
|
|
}
|
|
|
|
if (!s && pop) bc_vec_pop(&G.prog.results);
|
|
|
|
return s;
|
|
}
|
|
|
|
static BcStatus bc_program_negate(void)
|
|
{
|
|
BcStatus s;
|
|
BcResult res, *ptr;
|
|
BcNum *num = NULL;
|
|
|
|
s = bc_program_prep(&ptr, &num);
|
|
if (s) return s;
|
|
|
|
bc_num_init(&res.d.n, num->len);
|
|
bc_num_copy(&res.d.n, num);
|
|
if (res.d.n.len) res.d.n.neg = !res.d.n.neg;
|
|
|
|
bc_program_retire(&res, BC_RESULT_TEMP);
|
|
|
|
return s;
|
|
}
|
|
|
|
static BcStatus bc_program_logical(char inst)
|
|
{
|
|
BcStatus s;
|
|
BcResult *opd1, *opd2, res;
|
|
BcNum *n1, *n2;
|
|
bool cond = 0;
|
|
ssize_t cmp;
|
|
|
|
s = bc_program_binOpPrep(&opd1, &n1, &opd2, &n2, false);
|
|
if (s) return s;
|
|
bc_num_init(&res.d.n, BC_NUM_DEF_SIZE);
|
|
|
|
if (inst == BC_INST_BOOL_AND)
|
|
cond = bc_num_cmp(n1, &G.prog.zero) && bc_num_cmp(n2, &G.prog.zero);
|
|
else if (inst == BC_INST_BOOL_OR)
|
|
cond = bc_num_cmp(n1, &G.prog.zero) || bc_num_cmp(n2, &G.prog.zero);
|
|
else {
|
|
|
|
cmp = bc_num_cmp(n1, n2);
|
|
|
|
switch (inst) {
|
|
|
|
case BC_INST_REL_EQ:
|
|
{
|
|
cond = cmp == 0;
|
|
break;
|
|
}
|
|
|
|
case BC_INST_REL_LE:
|
|
{
|
|
cond = cmp <= 0;
|
|
break;
|
|
}
|
|
|
|
case BC_INST_REL_GE:
|
|
{
|
|
cond = cmp >= 0;
|
|
break;
|
|
}
|
|
|
|
case BC_INST_REL_NE:
|
|
{
|
|
cond = cmp != 0;
|
|
break;
|
|
}
|
|
|
|
case BC_INST_REL_LT:
|
|
{
|
|
cond = cmp < 0;
|
|
break;
|
|
}
|
|
|
|
case BC_INST_REL_GT:
|
|
{
|
|
cond = cmp > 0;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
(cond ? bc_num_one : bc_num_zero)(&res.d.n);
|
|
|
|
bc_program_binOpRetire(&res);
|
|
|
|
return s;
|
|
}
|
|
|
|
#if ENABLE_DC
|
|
static BcStatus bc_program_assignStr(BcResult *r, BcVec *v,
|
|
bool push)
|
|
{
|
|
BcNum n2;
|
|
BcResult res;
|
|
|
|
memset(&n2, 0, sizeof(BcNum));
|
|
n2.rdx = res.d.id.idx = r->d.id.idx;
|
|
res.t = BC_RESULT_STR;
|
|
|
|
if (!push) {
|
|
if (!BC_PROG_STACK(&G.prog.results, 2))
|
|
return bc_error_stack_has_too_few_elements();
|
|
bc_vec_pop(v);
|
|
bc_vec_pop(&G.prog.results);
|
|
}
|
|
|
|
bc_vec_pop(&G.prog.results);
|
|
|
|
bc_vec_push(&G.prog.results, &res);
|
|
bc_vec_push(v, &n2);
|
|
|
|
return BC_STATUS_SUCCESS;
|
|
}
|
|
#endif // ENABLE_DC
|
|
|
|
static BcStatus bc_program_copyToVar(char *name, bool var)
|
|
{
|
|
BcStatus s;
|
|
BcResult *ptr, r;
|
|
BcVec *v;
|
|
BcNum *n;
|
|
|
|
if (!BC_PROG_STACK(&G.prog.results, 1))
|
|
return bc_error_stack_has_too_few_elements();
|
|
|
|
ptr = bc_vec_top(&G.prog.results);
|
|
if ((ptr->t == BC_RESULT_ARRAY) != !var)
|
|
return bc_error_variable_is_wrong_type();
|
|
v = bc_program_search(name, var);
|
|
|
|
#if ENABLE_DC
|
|
if (ptr->t == BC_RESULT_STR && !var)
|
|
return bc_error_variable_is_wrong_type();
|
|
if (ptr->t == BC_RESULT_STR) return bc_program_assignStr(ptr, v, true);
|
|
#endif
|
|
|
|
s = bc_program_num(ptr, &n, false);
|
|
if (s) return s;
|
|
|
|
// Do this once more to make sure that pointers were not invalidated.
|
|
v = bc_program_search(name, var);
|
|
|
|
if (var) {
|
|
bc_num_init(&r.d.n, BC_NUM_DEF_SIZE);
|
|
bc_num_copy(&r.d.n, n);
|
|
}
|
|
else {
|
|
bc_array_init(&r.d.v, true);
|
|
bc_array_copy(&r.d.v, (BcVec *) n);
|
|
}
|
|
|
|
bc_vec_push(v, &r.d);
|
|
bc_vec_pop(&G.prog.results);
|
|
|
|
return s;
|
|
}
|
|
|
|
static BcStatus bc_program_assign(char inst)
|
|
{
|
|
BcStatus s;
|
|
BcResult *left, *right, res;
|
|
BcNum *l = NULL, *r = NULL;
|
|
bool assign = inst == BC_INST_ASSIGN, ib, sc;
|
|
|
|
s = bc_program_binOpPrep(&left, &l, &right, &r, assign);
|
|
if (s) return s;
|
|
|
|
ib = left->t == BC_RESULT_IBASE;
|
|
sc = left->t == BC_RESULT_SCALE;
|
|
|
|
#if ENABLE_DC
|
|
|
|
if (right->t == BC_RESULT_STR) {
|
|
|
|
BcVec *v;
|
|
|
|
if (left->t != BC_RESULT_VAR)
|
|
return bc_error_variable_is_wrong_type();
|
|
v = bc_program_search(left->d.id.name, true);
|
|
|
|
return bc_program_assignStr(right, v, false);
|
|
}
|
|
#endif
|
|
|
|
if (left->t == BC_RESULT_CONSTANT || left->t == BC_RESULT_TEMP)
|
|
return bc_error("bad assignment:"
|
|
" left side must be scale,"
|
|
" ibase, obase, last, var,"
|
|
" or array element"
|
|
);
|
|
|
|
#if ENABLE_BC
|
|
if (inst == BC_INST_ASSIGN_DIVIDE && !bc_num_cmp(r, &G.prog.zero))
|
|
return bc_error("divide by zero");
|
|
|
|
if (assign)
|
|
bc_num_copy(l, r);
|
|
else
|
|
s = bc_program_ops[inst - BC_INST_ASSIGN_POWER](l, r, l, G.prog.scale);
|
|
|
|
if (s) return s;
|
|
#else
|
|
bc_num_copy(l, r);
|
|
#endif
|
|
|
|
if (ib || sc || left->t == BC_RESULT_OBASE) {
|
|
static const char *const msg[] = {
|
|
"bad ibase; must be [2,16]", //BC_RESULT_IBASE
|
|
"bad scale; must be [0,"BC_MAX_SCALE_STR"]", //BC_RESULT_SCALE
|
|
NULL, //can't happen //BC_RESULT_LAST
|
|
NULL, //can't happen //BC_RESULT_CONSTANT
|
|
NULL, //can't happen //BC_RESULT_ONE
|
|
"bad obase; must be [2,"BC_MAX_OBASE_STR"]", //BC_RESULT_OBASE
|
|
};
|
|
size_t *ptr;
|
|
unsigned long val, max;
|
|
|
|
s = bc_num_ulong(l, &val);
|
|
if (s)
|
|
return s;
|
|
s = left->t - BC_RESULT_IBASE;
|
|
if (sc) {
|
|
max = BC_MAX_SCALE;
|
|
ptr = &G.prog.scale;
|
|
}
|
|
else {
|
|
if (val < BC_NUM_MIN_BASE)
|
|
return bc_error(msg[s]);
|
|
max = ib ? BC_NUM_MAX_IBASE : BC_MAX_OBASE;
|
|
ptr = ib ? &G.prog.ib_t : &G.prog.ob_t;
|
|
}
|
|
|
|
if (val > max)
|
|
return bc_error(msg[s]);
|
|
if (!sc)
|
|
bc_num_copy(ib ? &G.prog.ib : &G.prog.ob, l);
|
|
|
|
*ptr = (size_t) val;
|
|
s = BC_STATUS_SUCCESS;
|
|
}
|
|
|
|
bc_num_init(&res.d.n, l->len);
|
|
bc_num_copy(&res.d.n, l);
|
|
bc_program_binOpRetire(&res);
|
|
|
|
return s;
|
|
}
|
|
|
|
#if !ENABLE_DC
|
|
#define bc_program_pushVar(code, bgn, pop, copy) \
|
|
bc_program_pushVar(code, bgn)
|
|
// for bc, 'pop' and 'copy' are always false
|
|
#endif
|
|
static BcStatus bc_program_pushVar(char *code, size_t *bgn,
|
|
bool pop, bool copy)
|
|
{
|
|
BcStatus s = BC_STATUS_SUCCESS;
|
|
BcResult r;
|
|
char *name = bc_program_name(code, bgn);
|
|
|
|
r.t = BC_RESULT_VAR;
|
|
r.d.id.name = name;
|
|
|
|
#if ENABLE_DC
|
|
{
|
|
BcVec *v = bc_program_search(name, true);
|
|
BcNum *num = bc_vec_top(v);
|
|
|
|
if (pop || copy) {
|
|
|
|
if (!BC_PROG_STACK(v, 2 - copy)) {
|
|
free(name);
|
|
return bc_error_stack_has_too_few_elements();
|
|
}
|
|
|
|
free(name);
|
|
name = NULL;
|
|
|
|
if (!BC_PROG_STR(num)) {
|
|
|
|
r.t = BC_RESULT_TEMP;
|
|
|
|
bc_num_init(&r.d.n, BC_NUM_DEF_SIZE);
|
|
bc_num_copy(&r.d.n, num);
|
|
}
|
|
else {
|
|
r.t = BC_RESULT_STR;
|
|
r.d.id.idx = num->rdx;
|
|
}
|
|
|
|
if (!copy) bc_vec_pop(v);
|
|
}
|
|
}
|
|
#endif // ENABLE_DC
|
|
|
|
bc_vec_push(&G.prog.results, &r);
|
|
|
|
return s;
|
|
}
|
|
|
|
static BcStatus bc_program_pushArray(char *code, size_t *bgn,
|
|
char inst)
|
|
{
|
|
BcStatus s = BC_STATUS_SUCCESS;
|
|
BcResult r;
|
|
BcNum *num;
|
|
|
|
r.d.id.name = bc_program_name(code, bgn);
|
|
|
|
if (inst == BC_INST_ARRAY) {
|
|
r.t = BC_RESULT_ARRAY;
|
|
bc_vec_push(&G.prog.results, &r);
|
|
}
|
|
else {
|
|
|
|
BcResult *operand;
|
|
unsigned long temp;
|
|
|
|
s = bc_program_prep(&operand, &num);
|
|
if (s) goto err;
|
|
s = bc_num_ulong(num, &temp);
|
|
if (s) goto err;
|
|
|
|
if (temp > BC_MAX_DIM) {
|
|
s = bc_error("array too long; must be [1,"BC_MAX_DIM_STR"]");
|
|
goto err;
|
|
}
|
|
|
|
r.d.id.idx = (size_t) temp;
|
|
bc_program_retire(&r, BC_RESULT_ARRAY_ELEM);
|
|
}
|
|
|
|
err:
|
|
if (s) free(r.d.id.name);
|
|
return s;
|
|
}
|
|
|
|
#if ENABLE_BC
|
|
static BcStatus bc_program_incdec(char inst)
|
|
{
|
|
BcStatus s;
|
|
BcResult *ptr, res, copy;
|
|
BcNum *num = NULL;
|
|
char inst2 = inst;
|
|
|
|
s = bc_program_prep(&ptr, &num);
|
|
if (s) return s;
|
|
|
|
if (inst == BC_INST_INC_POST || inst == BC_INST_DEC_POST) {
|
|
copy.t = BC_RESULT_TEMP;
|
|
bc_num_init(©.d.n, num->len);
|
|
bc_num_copy(©.d.n, num);
|
|
}
|
|
|
|
res.t = BC_RESULT_ONE;
|
|
inst = inst == BC_INST_INC_PRE || inst == BC_INST_INC_POST ?
|
|
BC_INST_ASSIGN_PLUS :
|
|
BC_INST_ASSIGN_MINUS;
|
|
|
|
bc_vec_push(&G.prog.results, &res);
|
|
bc_program_assign(inst);
|
|
|
|
if (inst2 == BC_INST_INC_POST || inst2 == BC_INST_DEC_POST) {
|
|
bc_vec_pop(&G.prog.results);
|
|
bc_vec_push(&G.prog.results, ©);
|
|
}
|
|
|
|
return s;
|
|
}
|
|
|
|
static BcStatus bc_program_call(char *code, size_t *idx)
|
|
{
|
|
BcStatus s = BC_STATUS_SUCCESS;
|
|
BcInstPtr ip;
|
|
size_t i, nparams = bc_program_index(code, idx);
|
|
BcFunc *func;
|
|
BcId *a;
|
|
BcResultData param;
|
|
BcResult *arg;
|
|
|
|
ip.idx = 0;
|
|
ip.func = bc_program_index(code, idx);
|
|
func = bc_vec_item(&G.prog.fns, ip.func);
|
|
|
|
if (func->code.len == 0) {
|
|
return bc_error("undefined function");
|
|
}
|
|
if (nparams != func->nparams) {
|
|
return bc_error_fmt("function has %u parameters, but called with %u", func->nparams, nparams);
|
|
}
|
|
ip.len = G.prog.results.len - nparams;
|
|
|
|
for (i = 0; i < nparams; ++i) {
|
|
|
|
a = bc_vec_item(&func->autos, nparams - 1 - i);
|
|
arg = bc_vec_top(&G.prog.results);
|
|
|
|
if ((!a->idx) != (arg->t == BC_RESULT_ARRAY) || arg->t == BC_RESULT_STR)
|
|
return bc_error_variable_is_wrong_type();
|
|
|
|
s = bc_program_copyToVar(a->name, a->idx);
|
|
if (s) return s;
|
|
}
|
|
|
|
for (; i < func->autos.len; ++i) {
|
|
BcVec *v;
|
|
|
|
a = bc_vec_item(&func->autos, i);
|
|
v = bc_program_search(a->name, a->idx);
|
|
|
|
if (a->idx) {
|
|
bc_num_init(¶m.n, BC_NUM_DEF_SIZE);
|
|
bc_vec_push(v, ¶m.n);
|
|
}
|
|
else {
|
|
bc_array_init(¶m.v, true);
|
|
bc_vec_push(v, ¶m.v);
|
|
}
|
|
}
|
|
|
|
bc_vec_push(&G.prog.stack, &ip);
|
|
|
|
return BC_STATUS_SUCCESS;
|
|
}
|
|
|
|
static BcStatus bc_program_return(char inst)
|
|
{
|
|
BcStatus s;
|
|
BcResult res;
|
|
BcFunc *f;
|
|
size_t i;
|
|
BcInstPtr *ip = bc_vec_top(&G.prog.stack);
|
|
|
|
if (!BC_PROG_STACK(&G.prog.results, ip->len + inst == BC_INST_RET))
|
|
return bc_error_stack_has_too_few_elements();
|
|
|
|
f = bc_vec_item(&G.prog.fns, ip->func);
|
|
res.t = BC_RESULT_TEMP;
|
|
|
|
if (inst == BC_INST_RET) {
|
|
|
|
BcNum *num;
|
|
BcResult *operand = bc_vec_top(&G.prog.results);
|
|
|
|
s = bc_program_num(operand, &num, false);
|
|
if (s) return s;
|
|
bc_num_init(&res.d.n, num->len);
|
|
bc_num_copy(&res.d.n, num);
|
|
}
|
|
else {
|
|
bc_num_init(&res.d.n, BC_NUM_DEF_SIZE);
|
|
bc_num_zero(&res.d.n);
|
|
}
|
|
|
|
// We need to pop arguments as well, so this takes that into account.
|
|
for (i = 0; i < f->autos.len; ++i) {
|
|
|
|
BcVec *v;
|
|
BcId *a = bc_vec_item(&f->autos, i);
|
|
|
|
v = bc_program_search(a->name, a->idx);
|
|
bc_vec_pop(v);
|
|
}
|
|
|
|
bc_vec_npop(&G.prog.results, G.prog.results.len - ip->len);
|
|
bc_vec_push(&G.prog.results, &res);
|
|
bc_vec_pop(&G.prog.stack);
|
|
|
|
return BC_STATUS_SUCCESS;
|
|
}
|
|
#endif // ENABLE_BC
|
|
|
|
static unsigned long bc_program_scale(BcNum *n)
|
|
{
|
|
return (unsigned long) n->rdx;
|
|
}
|
|
|
|
static unsigned long bc_program_len(BcNum *n)
|
|
{
|
|
unsigned long len = n->len;
|
|
size_t i;
|
|
|
|
if (n->rdx != n->len) return len;
|
|
for (i = n->len - 1; i < n->len && n->num[i] == 0; --len, --i);
|
|
|
|
return len;
|
|
}
|
|
|
|
static BcStatus bc_program_builtin(char inst)
|
|
{
|
|
BcStatus s;
|
|
BcResult *opnd;
|
|
BcNum *num = NULL;
|
|
BcResult res;
|
|
bool len = inst == BC_INST_LENGTH;
|
|
|
|
if (!BC_PROG_STACK(&G.prog.results, 1))
|
|
return bc_error_stack_has_too_few_elements();
|
|
opnd = bc_vec_top(&G.prog.results);
|
|
|
|
s = bc_program_num(opnd, &num, false);
|
|
if (s) return s;
|
|
|
|
#if ENABLE_DC
|
|
if (!BC_PROG_NUM(opnd, num) && !len)
|
|
return bc_error_variable_is_wrong_type();
|
|
#endif
|
|
|
|
bc_num_init(&res.d.n, BC_NUM_DEF_SIZE);
|
|
|
|
if (inst == BC_INST_SQRT) s = bc_num_sqrt(num, &res.d.n, G.prog.scale);
|
|
#if ENABLE_BC
|
|
else if (len != 0 && opnd->t == BC_RESULT_ARRAY) {
|
|
bc_num_ulong2num(&res.d.n, (unsigned long) ((BcVec *) num)->len);
|
|
}
|
|
#endif
|
|
#if ENABLE_DC
|
|
else if (len != 0 && !BC_PROG_NUM(opnd, num)) {
|
|
|
|
char **str;
|
|
size_t idx = opnd->t == BC_RESULT_STR ? opnd->d.id.idx : num->rdx;
|
|
|
|
str = bc_vec_item(&G.prog.strs, idx);
|
|
bc_num_ulong2num(&res.d.n, strlen(*str));
|
|
}
|
|
#endif
|
|
else {
|
|
BcProgramBuiltIn f = len ? bc_program_len : bc_program_scale;
|
|
bc_num_ulong2num(&res.d.n, f(num));
|
|
}
|
|
|
|
bc_program_retire(&res, BC_RESULT_TEMP);
|
|
|
|
return s;
|
|
}
|
|
|
|
#if ENABLE_DC
|
|
static BcStatus bc_program_divmod(void)
|
|
{
|
|
BcStatus s;
|
|
BcResult *opd1, *opd2, res, res2;
|
|
BcNum *n1, *n2 = NULL;
|
|
|
|
s = bc_program_binOpPrep(&opd1, &n1, &opd2, &n2, false);
|
|
if (s) return s;
|
|
|
|
bc_num_init(&res.d.n, BC_NUM_DEF_SIZE);
|
|
bc_num_init(&res2.d.n, n2->len);
|
|
|
|
s = bc_num_divmod(n1, n2, &res2.d.n, &res.d.n, G.prog.scale);
|
|
if (s) goto err;
|
|
|
|
bc_program_binOpRetire(&res2);
|
|
res.t = BC_RESULT_TEMP;
|
|
bc_vec_push(&G.prog.results, &res);
|
|
|
|
return s;
|
|
|
|
err:
|
|
bc_num_free(&res2.d.n);
|
|
bc_num_free(&res.d.n);
|
|
return s;
|
|
}
|
|
|
|
static BcStatus bc_program_modexp(void)
|
|
{
|
|
BcStatus s;
|
|
BcResult *r1, *r2, *r3, res;
|
|
BcNum *n1, *n2, *n3;
|
|
|
|
if (!BC_PROG_STACK(&G.prog.results, 3))
|
|
return bc_error_stack_has_too_few_elements();
|
|
s = bc_program_binOpPrep(&r2, &n2, &r3, &n3, false);
|
|
if (s) return s;
|
|
|
|
r1 = bc_vec_item_rev(&G.prog.results, 2);
|
|
s = bc_program_num(r1, &n1, false);
|
|
if (s) return s;
|
|
if (!BC_PROG_NUM(r1, n1))
|
|
return bc_error_variable_is_wrong_type();
|
|
|
|
// Make sure that the values have their pointers updated, if necessary.
|
|
if (r1->t == BC_RESULT_VAR || r1->t == BC_RESULT_ARRAY_ELEM) {
|
|
|
|
if (r1->t == r2->t) {
|
|
s = bc_program_num(r2, &n2, false);
|
|
if (s) return s;
|
|
}
|
|
|
|
if (r1->t == r3->t) {
|
|
s = bc_program_num(r3, &n3, false);
|
|
if (s) return s;
|
|
}
|
|
}
|
|
|
|
bc_num_init(&res.d.n, n3->len);
|
|
s = bc_num_modexp(n1, n2, n3, &res.d.n);
|
|
if (s) goto err;
|
|
|
|
bc_vec_pop(&G.prog.results);
|
|
bc_program_binOpRetire(&res);
|
|
|
|
return s;
|
|
|
|
err:
|
|
bc_num_free(&res.d.n);
|
|
return s;
|
|
}
|
|
|
|
static void bc_program_stackLen(void)
|
|
{
|
|
BcResult res;
|
|
size_t len = G.prog.results.len;
|
|
|
|
res.t = BC_RESULT_TEMP;
|
|
|
|
bc_num_init(&res.d.n, BC_NUM_DEF_SIZE);
|
|
bc_num_ulong2num(&res.d.n, len);
|
|
bc_vec_push(&G.prog.results, &res);
|
|
}
|
|
|
|
static BcStatus bc_program_asciify(void)
|
|
{
|
|
BcStatus s;
|
|
BcResult *r, res;
|
|
BcNum *num = NULL, n;
|
|
char *str, *str2, c;
|
|
size_t len = G.prog.strs.len, idx;
|
|
unsigned long val;
|
|
|
|
if (!BC_PROG_STACK(&G.prog.results, 1))
|
|
return bc_error_stack_has_too_few_elements();
|
|
r = bc_vec_top(&G.prog.results);
|
|
|
|
s = bc_program_num(r, &num, false);
|
|
if (s) return s;
|
|
|
|
if (BC_PROG_NUM(r, num)) {
|
|
|
|
bc_num_init(&n, BC_NUM_DEF_SIZE);
|
|
bc_num_copy(&n, num);
|
|
bc_num_truncate(&n, n.rdx);
|
|
|
|
s = bc_num_mod(&n, &G.prog.strmb, &n, 0);
|
|
if (s) goto num_err;
|
|
s = bc_num_ulong(&n, &val);
|
|
if (s) goto num_err;
|
|
|
|
c = (char) val;
|
|
|
|
bc_num_free(&n);
|
|
}
|
|
else {
|
|
idx = (r->t == BC_RESULT_STR) ? r->d.id.idx : num->rdx;
|
|
str2 = *((char **) bc_vec_item(&G.prog.strs, idx));
|
|
c = str2[0];
|
|
}
|
|
|
|
str = xmalloc(2);
|
|
str[0] = c;
|
|
str[1] = '\0';
|
|
|
|
str2 = xstrdup(str);
|
|
bc_program_addFunc(str2, &idx);
|
|
|
|
if (idx != len + BC_PROG_REQ_FUNCS) {
|
|
|
|
for (idx = 0; idx < G.prog.strs.len; ++idx) {
|
|
if (!strcmp(*((char **) bc_vec_item(&G.prog.strs, idx)), str)) {
|
|
len = idx;
|
|
break;
|
|
}
|
|
}
|
|
|
|
free(str);
|
|
}
|
|
else
|
|
bc_vec_push(&G.prog.strs, &str);
|
|
|
|
res.t = BC_RESULT_STR;
|
|
res.d.id.idx = len;
|
|
bc_vec_pop(&G.prog.results);
|
|
bc_vec_push(&G.prog.results, &res);
|
|
|
|
return BC_STATUS_SUCCESS;
|
|
|
|
num_err:
|
|
bc_num_free(&n);
|
|
return s;
|
|
}
|
|
|
|
static BcStatus bc_program_printStream(void)
|
|
{
|
|
BcStatus s;
|
|
BcResult *r;
|
|
BcNum *n = NULL;
|
|
size_t idx;
|
|
char *str;
|
|
|
|
if (!BC_PROG_STACK(&G.prog.results, 1))
|
|
return bc_error_stack_has_too_few_elements();
|
|
r = bc_vec_top(&G.prog.results);
|
|
|
|
s = bc_program_num(r, &n, false);
|
|
if (s) return s;
|
|
|
|
if (BC_PROG_NUM(r, n))
|
|
s = bc_num_stream(n, &G.prog.strmb, &G.prog.nchars, G.prog.len);
|
|
else {
|
|
idx = (r->t == BC_RESULT_STR) ? r->d.id.idx : n->rdx;
|
|
str = *((char **) bc_vec_item(&G.prog.strs, idx));
|
|
printf("%s", str);
|
|
}
|
|
|
|
return s;
|
|
}
|
|
|
|
static BcStatus bc_program_nquit(void)
|
|
{
|
|
BcStatus s;
|
|
BcResult *opnd;
|
|
BcNum *num = NULL;
|
|
unsigned long val;
|
|
|
|
s = bc_program_prep(&opnd, &num);
|
|
if (s) return s;
|
|
s = bc_num_ulong(num, &val);
|
|
if (s) return s;
|
|
|
|
bc_vec_pop(&G.prog.results);
|
|
|
|
if (G.prog.stack.len < val)
|
|
return bc_error_stack_has_too_few_elements();
|
|
if (G.prog.stack.len == val) {
|
|
QUIT_OR_RETURN_TO_MAIN;
|
|
}
|
|
|
|
bc_vec_npop(&G.prog.stack, val);
|
|
|
|
return s;
|
|
}
|
|
|
|
static BcStatus bc_program_execStr(char *code, size_t *bgn,
|
|
bool cond)
|
|
{
|
|
BcStatus s = BC_STATUS_SUCCESS;
|
|
BcResult *r;
|
|
char **str;
|
|
BcFunc *f;
|
|
BcParse prs;
|
|
BcInstPtr ip;
|
|
size_t fidx, sidx;
|
|
BcNum *n;
|
|
bool exec;
|
|
|
|
if (!BC_PROG_STACK(&G.prog.results, 1))
|
|
return bc_error_stack_has_too_few_elements();
|
|
|
|
r = bc_vec_top(&G.prog.results);
|
|
|
|
if (cond) {
|
|
|
|
char *name, *then_name = bc_program_name(code, bgn), *else_name = NULL;
|
|
|
|
if (code[*bgn] == BC_PARSE_STREND)
|
|
(*bgn) += 1;
|
|
else
|
|
else_name = bc_program_name(code, bgn);
|
|
|
|
exec = r->d.n.len != 0;
|
|
|
|
if (exec)
|
|
name = then_name;
|
|
else if (else_name != NULL) {
|
|
exec = true;
|
|
name = else_name;
|
|
}
|
|
|
|
if (exec) {
|
|
BcVec *v;
|
|
v = bc_program_search(name, true);
|
|
n = bc_vec_top(v);
|
|
}
|
|
|
|
free(then_name);
|
|
free(else_name);
|
|
|
|
if (!exec) goto exit;
|
|
if (!BC_PROG_STR(n)) {
|
|
s = bc_error_variable_is_wrong_type();
|
|
goto exit;
|
|
}
|
|
|
|
sidx = n->rdx;
|
|
}
|
|
else {
|
|
|
|
if (r->t == BC_RESULT_STR)
|
|
sidx = r->d.id.idx;
|
|
else if (r->t == BC_RESULT_VAR) {
|
|
s = bc_program_num(r, &n, false);
|
|
if (s || !BC_PROG_STR(n)) goto exit;
|
|
sidx = n->rdx;
|
|
}
|
|
else
|
|
goto exit;
|
|
}
|
|
|
|
fidx = sidx + BC_PROG_REQ_FUNCS;
|
|
|
|
str = bc_vec_item(&G.prog.strs, sidx);
|
|
f = bc_vec_item(&G.prog.fns, fidx);
|
|
|
|
if (f->code.len == 0) {
|
|
common_parse_init(&prs, fidx);
|
|
s = bc_parse_text(&prs, *str);
|
|
if (s) goto err;
|
|
s = common_parse_expr(&prs, BC_PARSE_NOCALL);
|
|
if (s) goto err;
|
|
|
|
if (prs.l.t.t != BC_LEX_EOF) {
|
|
s = bc_error_bad_expression();
|
|
goto err;
|
|
}
|
|
|
|
bc_parse_free(&prs);
|
|
}
|
|
|
|
ip.idx = 0;
|
|
ip.len = G.prog.results.len;
|
|
ip.func = fidx;
|
|
|
|
bc_vec_pop(&G.prog.results);
|
|
bc_vec_push(&G.prog.stack, &ip);
|
|
|
|
return BC_STATUS_SUCCESS;
|
|
|
|
err:
|
|
bc_parse_free(&prs);
|
|
f = bc_vec_item(&G.prog.fns, fidx);
|
|
bc_vec_pop_all(&f->code);
|
|
exit:
|
|
bc_vec_pop(&G.prog.results);
|
|
return s;
|
|
}
|
|
#endif // ENABLE_DC
|
|
|
|
static void bc_program_pushGlobal(char inst)
|
|
{
|
|
BcResult res;
|
|
unsigned long val;
|
|
|
|
res.t = inst - BC_INST_IBASE + BC_RESULT_IBASE;
|
|
if (inst == BC_INST_IBASE)
|
|
val = (unsigned long) G.prog.ib_t;
|
|
else if (inst == BC_INST_SCALE)
|
|
val = (unsigned long) G.prog.scale;
|
|
else
|
|
val = (unsigned long) G.prog.ob_t;
|
|
|
|
bc_num_init(&res.d.n, BC_NUM_DEF_SIZE);
|
|
bc_num_ulong2num(&res.d.n, val);
|
|
bc_vec_push(&G.prog.results, &res);
|
|
}
|
|
|
|
static void bc_program_addFunc(char *name, size_t *idx)
|
|
{
|
|
BcId entry, *entry_ptr;
|
|
BcFunc f;
|
|
int inserted;
|
|
|
|
entry.name = name;
|
|
entry.idx = G.prog.fns.len;
|
|
|
|
inserted = bc_map_insert(&G.prog.fn_map, &entry, idx);
|
|
if (!inserted) free(name);
|
|
|
|
entry_ptr = bc_vec_item(&G.prog.fn_map, *idx);
|
|
*idx = entry_ptr->idx;
|
|
|
|
if (!inserted) {
|
|
|
|
BcFunc *func = bc_vec_item(&G.prog.fns, entry_ptr->idx);
|
|
|
|
// We need to reset these, so the function can be repopulated.
|
|
func->nparams = 0;
|
|
bc_vec_pop_all(&func->autos);
|
|
bc_vec_pop_all(&func->code);
|
|
bc_vec_pop_all(&func->labels);
|
|
}
|
|
else {
|
|
bc_func_init(&f);
|
|
bc_vec_push(&G.prog.fns, &f);
|
|
}
|
|
}
|
|
|
|
static BcStatus bc_program_exec(void)
|
|
{
|
|
BcStatus s = BC_STATUS_SUCCESS;
|
|
size_t idx;
|
|
BcResult r, *ptr;
|
|
BcNum *num;
|
|
BcInstPtr *ip = bc_vec_top(&G.prog.stack);
|
|
BcFunc *func = bc_vec_item(&G.prog.fns, ip->func);
|
|
char *code = func->code.v;
|
|
bool cond = false;
|
|
|
|
while (!s && ip->idx < func->code.len) {
|
|
|
|
char inst = code[(ip->idx)++];
|
|
|
|
switch (inst) {
|
|
|
|
#if ENABLE_BC
|
|
case BC_INST_JUMP_ZERO:
|
|
{
|
|
s = bc_program_prep(&ptr, &num);
|
|
if (s) return s;
|
|
cond = !bc_num_cmp(num, &G.prog.zero);
|
|
bc_vec_pop(&G.prog.results);
|
|
}
|
|
// Fallthrough.
|
|
case BC_INST_JUMP:
|
|
{
|
|
size_t *addr;
|
|
idx = bc_program_index(code, &ip->idx);
|
|
addr = bc_vec_item(&func->labels, idx);
|
|
if (inst == BC_INST_JUMP || cond) ip->idx = *addr;
|
|
break;
|
|
}
|
|
|
|
case BC_INST_CALL:
|
|
{
|
|
s = bc_program_call(code, &ip->idx);
|
|
break;
|
|
}
|
|
|
|
case BC_INST_INC_PRE:
|
|
case BC_INST_DEC_PRE:
|
|
case BC_INST_INC_POST:
|
|
case BC_INST_DEC_POST:
|
|
{
|
|
s = bc_program_incdec(inst);
|
|
break;
|
|
}
|
|
|
|
case BC_INST_HALT:
|
|
{
|
|
QUIT_OR_RETURN_TO_MAIN;
|
|
break;
|
|
}
|
|
|
|
case BC_INST_RET:
|
|
case BC_INST_RET0:
|
|
{
|
|
s = bc_program_return(inst);
|
|
break;
|
|
}
|
|
|
|
case BC_INST_BOOL_OR:
|
|
case BC_INST_BOOL_AND:
|
|
#endif // ENABLE_BC
|
|
case BC_INST_REL_EQ:
|
|
case BC_INST_REL_LE:
|
|
case BC_INST_REL_GE:
|
|
case BC_INST_REL_NE:
|
|
case BC_INST_REL_LT:
|
|
case BC_INST_REL_GT:
|
|
{
|
|
s = bc_program_logical(inst);
|
|
break;
|
|
}
|
|
|
|
case BC_INST_READ:
|
|
{
|
|
s = bc_program_read();
|
|
break;
|
|
}
|
|
|
|
case BC_INST_VAR:
|
|
{
|
|
s = bc_program_pushVar(code, &ip->idx, false, false);
|
|
break;
|
|
}
|
|
|
|
case BC_INST_ARRAY_ELEM:
|
|
case BC_INST_ARRAY:
|
|
{
|
|
s = bc_program_pushArray(code, &ip->idx, inst);
|
|
break;
|
|
}
|
|
|
|
case BC_INST_LAST:
|
|
{
|
|
r.t = BC_RESULT_LAST;
|
|
bc_vec_push(&G.prog.results, &r);
|
|
break;
|
|
}
|
|
|
|
case BC_INST_IBASE:
|
|
case BC_INST_SCALE:
|
|
case BC_INST_OBASE:
|
|
{
|
|
bc_program_pushGlobal(inst);
|
|
break;
|
|
}
|
|
|
|
case BC_INST_SCALE_FUNC:
|
|
case BC_INST_LENGTH:
|
|
case BC_INST_SQRT:
|
|
{
|
|
s = bc_program_builtin(inst);
|
|
break;
|
|
}
|
|
|
|
case BC_INST_NUM:
|
|
{
|
|
r.t = BC_RESULT_CONSTANT;
|
|
r.d.id.idx = bc_program_index(code, &ip->idx);
|
|
bc_vec_push(&G.prog.results, &r);
|
|
break;
|
|
}
|
|
|
|
case BC_INST_POP:
|
|
{
|
|
if (!BC_PROG_STACK(&G.prog.results, 1))
|
|
s = bc_error_stack_has_too_few_elements();
|
|
else
|
|
bc_vec_pop(&G.prog.results);
|
|
break;
|
|
}
|
|
|
|
case BC_INST_POP_EXEC:
|
|
{
|
|
bc_vec_pop(&G.prog.stack);
|
|
break;
|
|
}
|
|
|
|
case BC_INST_PRINT:
|
|
case BC_INST_PRINT_POP:
|
|
case BC_INST_PRINT_STR:
|
|
{
|
|
s = bc_program_print(inst, 0);
|
|
break;
|
|
}
|
|
|
|
case BC_INST_STR:
|
|
{
|
|
r.t = BC_RESULT_STR;
|
|
r.d.id.idx = bc_program_index(code, &ip->idx);
|
|
bc_vec_push(&G.prog.results, &r);
|
|
break;
|
|
}
|
|
|
|
case BC_INST_POWER:
|
|
case BC_INST_MULTIPLY:
|
|
case BC_INST_DIVIDE:
|
|
case BC_INST_MODULUS:
|
|
case BC_INST_PLUS:
|
|
case BC_INST_MINUS:
|
|
{
|
|
s = bc_program_op(inst);
|
|
break;
|
|
}
|
|
|
|
case BC_INST_BOOL_NOT:
|
|
{
|
|
s = bc_program_prep(&ptr, &num);
|
|
if (s) return s;
|
|
|
|
bc_num_init(&r.d.n, BC_NUM_DEF_SIZE);
|
|
(!bc_num_cmp(num, &G.prog.zero) ? bc_num_one : bc_num_zero)(&r.d.n);
|
|
bc_program_retire(&r, BC_RESULT_TEMP);
|
|
|
|
break;
|
|
}
|
|
|
|
case BC_INST_NEG:
|
|
{
|
|
s = bc_program_negate();
|
|
break;
|
|
}
|
|
|
|
#if ENABLE_BC
|
|
case BC_INST_ASSIGN_POWER:
|
|
case BC_INST_ASSIGN_MULTIPLY:
|
|
case BC_INST_ASSIGN_DIVIDE:
|
|
case BC_INST_ASSIGN_MODULUS:
|
|
case BC_INST_ASSIGN_PLUS:
|
|
case BC_INST_ASSIGN_MINUS:
|
|
#endif
|
|
case BC_INST_ASSIGN:
|
|
{
|
|
s = bc_program_assign(inst);
|
|
break;
|
|
}
|
|
#if ENABLE_DC
|
|
case BC_INST_MODEXP:
|
|
{
|
|
s = bc_program_modexp();
|
|
break;
|
|
}
|
|
|
|
case BC_INST_DIVMOD:
|
|
{
|
|
s = bc_program_divmod();
|
|
break;
|
|
}
|
|
|
|
case BC_INST_EXECUTE:
|
|
case BC_INST_EXEC_COND:
|
|
{
|
|
cond = inst == BC_INST_EXEC_COND;
|
|
s = bc_program_execStr(code, &ip->idx, cond);
|
|
break;
|
|
}
|
|
|
|
case BC_INST_PRINT_STACK:
|
|
{
|
|
for (idx = 0; !s && idx < G.prog.results.len; ++idx)
|
|
s = bc_program_print(BC_INST_PRINT, idx);
|
|
break;
|
|
}
|
|
|
|
case BC_INST_CLEAR_STACK:
|
|
{
|
|
bc_vec_pop_all(&G.prog.results);
|
|
break;
|
|
}
|
|
|
|
case BC_INST_STACK_LEN:
|
|
{
|
|
bc_program_stackLen();
|
|
break;
|
|
}
|
|
|
|
case BC_INST_DUPLICATE:
|
|
{
|
|
if (!BC_PROG_STACK(&G.prog.results, 1))
|
|
return bc_error_stack_has_too_few_elements();
|
|
ptr = bc_vec_top(&G.prog.results);
|
|
bc_result_copy(&r, ptr);
|
|
bc_vec_push(&G.prog.results, &r);
|
|
break;
|
|
}
|
|
|
|
case BC_INST_SWAP:
|
|
{
|
|
BcResult *ptr2;
|
|
|
|
if (!BC_PROG_STACK(&G.prog.results, 2))
|
|
return bc_error_stack_has_too_few_elements();
|
|
|
|
ptr = bc_vec_item_rev(&G.prog.results, 0);
|
|
ptr2 = bc_vec_item_rev(&G.prog.results, 1);
|
|
memcpy(&r, ptr, sizeof(BcResult));
|
|
memcpy(ptr, ptr2, sizeof(BcResult));
|
|
memcpy(ptr2, &r, sizeof(BcResult));
|
|
|
|
break;
|
|
}
|
|
|
|
case BC_INST_ASCIIFY:
|
|
{
|
|
s = bc_program_asciify();
|
|
break;
|
|
}
|
|
|
|
case BC_INST_PRINT_STREAM:
|
|
{
|
|
s = bc_program_printStream();
|
|
break;
|
|
}
|
|
|
|
case BC_INST_LOAD:
|
|
case BC_INST_PUSH_VAR:
|
|
{
|
|
bool copy = inst == BC_INST_LOAD;
|
|
s = bc_program_pushVar(code, &ip->idx, true, copy);
|
|
break;
|
|
}
|
|
|
|
case BC_INST_PUSH_TO_VAR:
|
|
{
|
|
char *name = bc_program_name(code, &ip->idx);
|
|
s = bc_program_copyToVar(name, true);
|
|
free(name);
|
|
break;
|
|
}
|
|
|
|
case BC_INST_QUIT:
|
|
{
|
|
if (G.prog.stack.len <= 2)
|
|
QUIT_OR_RETURN_TO_MAIN;
|
|
bc_vec_npop(&G.prog.stack, 2);
|
|
break;
|
|
}
|
|
|
|
case BC_INST_NQUIT:
|
|
{
|
|
s = bc_program_nquit();
|
|
break;
|
|
}
|
|
#endif // ENABLE_DC
|
|
}
|
|
|
|
if (s || G_interrupt) {
|
|
bc_program_reset();
|
|
break;
|
|
}
|
|
|
|
// If the stack has changed, pointers may be invalid.
|
|
ip = bc_vec_top(&G.prog.stack);
|
|
func = bc_vec_item(&G.prog.fns, ip->func);
|
|
code = func->code.v;
|
|
}
|
|
|
|
return s;
|
|
}
|
|
|
|
#if ENABLE_BC
|
|
static void bc_vm_info(void)
|
|
{
|
|
printf("%s "BB_VER"\n"
|
|
"Copyright (c) 2018 Gavin D. Howard and contributors\n"
|
|
"Report bugs at: https://github.com/gavinhoward/bc\n"
|
|
"This is free software with ABSOLUTELY NO WARRANTY\n"
|
|
, applet_name);
|
|
}
|
|
|
|
static void bc_args(char **argv)
|
|
{
|
|
unsigned opts;
|
|
int i;
|
|
|
|
GETOPT_RESET();
|
|
#if ENABLE_FEATURE_BC_LONG_OPTIONS
|
|
opts = option_mask32 |= getopt32long(argv, "wvsqli",
|
|
"warn\0" No_argument "w"
|
|
"version\0" No_argument "v"
|
|
"standard\0" No_argument "s"
|
|
"quiet\0" No_argument "q"
|
|
"mathlib\0" No_argument "l"
|
|
"interactive\0" No_argument "i"
|
|
);
|
|
#else
|
|
opts = option_mask32 |= getopt32(argv, "wvsqli");
|
|
#endif
|
|
if (getenv("POSIXLY_CORRECT"))
|
|
option_mask32 |= BC_FLAG_S;
|
|
|
|
///should be in bc_vm_run() instead??
|
|
if (opts & BC_FLAG_V) {
|
|
bc_vm_info();
|
|
exit(0);
|
|
}
|
|
|
|
for (i = optind; argv[i]; ++i)
|
|
bc_vec_push(&G.files, argv + i);
|
|
}
|
|
|
|
static void bc_vm_envArgs(void)
|
|
{
|
|
BcVec v;
|
|
char *buf;
|
|
char *env_args = getenv("BC_ENV_ARGS");
|
|
|
|
if (!env_args) return;
|
|
|
|
G.env_args = xstrdup(env_args);
|
|
buf = G.env_args;
|
|
|
|
bc_vec_init(&v, sizeof(char *), NULL);
|
|
|
|
while (*(buf = skip_whitespace(buf)) != '\0') {
|
|
bc_vec_push(&v, &buf);
|
|
buf = skip_non_whitespace(buf);
|
|
if (!*buf)
|
|
break;
|
|
*buf++ = '\0';
|
|
}
|
|
|
|
// NULL terminate, and pass argv[] so that first arg is argv[1]
|
|
if (sizeof(int) == sizeof(char*)) {
|
|
bc_vec_push(&v, &const_int_0);
|
|
} else {
|
|
static char *const nullptr = NULL;
|
|
bc_vec_push(&v, &nullptr);
|
|
}
|
|
bc_args(((char **)v.v) - 1);
|
|
|
|
bc_vec_free(&v);
|
|
}
|
|
#endif // ENABLE_BC
|
|
|
|
static unsigned bc_vm_envLen(const char *var)
|
|
{
|
|
char *lenv;
|
|
unsigned len;
|
|
|
|
lenv = getenv(var);
|
|
len = BC_NUM_PRINT_WIDTH;
|
|
if (!lenv) return len;
|
|
|
|
len = bb_strtou(lenv, NULL, 10) - 1;
|
|
if (errno || len < 2 || len >= INT_MAX)
|
|
len = BC_NUM_PRINT_WIDTH;
|
|
|
|
return len;
|
|
}
|
|
|
|
static BcStatus bc_vm_process(const char *text)
|
|
{
|
|
BcStatus s = bc_parse_text(&G.prs, text);
|
|
|
|
if (s) return s;
|
|
|
|
while (G.prs.l.t.t != BC_LEX_EOF) {
|
|
s = G.prs.parse(&G.prs);
|
|
if (s) return s;
|
|
}
|
|
|
|
if (BC_PARSE_CAN_EXEC(&G.prs)) {
|
|
s = bc_program_exec();
|
|
fflush_and_check();
|
|
if (s)
|
|
bc_program_reset();
|
|
}
|
|
|
|
return s;
|
|
}
|
|
|
|
static BcStatus bc_vm_file(const char *file)
|
|
{
|
|
const char *sv_file;
|
|
char *data;
|
|
BcStatus s;
|
|
BcFunc *main_func;
|
|
BcInstPtr *ip;
|
|
|
|
data = bc_read_file(file);
|
|
if (!data) return bc_error_fmt("file '%s' is not text", file);
|
|
|
|
sv_file = G.prog.file;
|
|
G.prog.file = file;
|
|
bc_lex_file(&G.prs.l);
|
|
s = bc_vm_process(data);
|
|
if (s) goto err;
|
|
|
|
main_func = bc_vec_item(&G.prog.fns, BC_PROG_MAIN);
|
|
ip = bc_vec_item(&G.prog.stack, 0);
|
|
|
|
if (main_func->code.len < ip->idx)
|
|
s = bc_error_fmt("file '%s' is not executable", file);
|
|
|
|
err:
|
|
G.prog.file = sv_file;
|
|
free(data);
|
|
return s;
|
|
}
|
|
|
|
static BcStatus bc_vm_stdin(void)
|
|
{
|
|
BcStatus s;
|
|
BcVec buf, buffer;
|
|
size_t len, i, str = 0;
|
|
bool comment = false;
|
|
|
|
G.prog.file = NULL;
|
|
bc_lex_file(&G.prs.l);
|
|
|
|
bc_char_vec_init(&buffer);
|
|
bc_char_vec_init(&buf);
|
|
bc_vec_pushZeroByte(&buffer);
|
|
|
|
// This loop is complex because the vm tries not to send any lines that end
|
|
// with a backslash to the parser. The reason for that is because the parser
|
|
// treats a backslash+newline combo as whitespace, per the bc spec. In that
|
|
// case, and for strings and comments, the parser will expect more stuff.
|
|
while ((s = bc_read_line(&buf, ">>> ")) == BC_STATUS_SUCCESS) {
|
|
|
|
char *string = buf.v;
|
|
|
|
len = buf.len - 1;
|
|
|
|
if (len == 1) {
|
|
if (str && buf.v[0] == G.send)
|
|
str -= 1;
|
|
else if (buf.v[0] == G.sbgn)
|
|
str += 1;
|
|
}
|
|
else if (len > 1 || comment) {
|
|
|
|
for (i = 0; i < len; ++i) {
|
|
|
|
bool notend = len > i + 1;
|
|
char c = string[i];
|
|
|
|
if (i - 1 > len || string[i - 1] != '\\') {
|
|
if (G.sbgn == G.send)
|
|
str ^= c == G.sbgn;
|
|
else if (c == G.send)
|
|
str -= 1;
|
|
else if (c == G.sbgn)
|
|
str += 1;
|
|
}
|
|
|
|
if (c == '/' && notend && !comment && string[i + 1] == '*') {
|
|
comment = true;
|
|
break;
|
|
}
|
|
else if (c == '*' && notend && comment && string[i + 1] == '/')
|
|
comment = false;
|
|
}
|
|
|
|
if (str || comment || string[len - 2] == '\\') {
|
|
bc_vec_concat(&buffer, buf.v);
|
|
continue;
|
|
}
|
|
}
|
|
|
|
bc_vec_concat(&buffer, buf.v);
|
|
s = bc_vm_process(buffer.v);
|
|
if (s) {
|
|
if (ENABLE_FEATURE_CLEAN_UP && !G_ttyin) {
|
|
// Debug config, non-interactive mode:
|
|
// return all the way back to main.
|
|
// Non-debug builds do not come here, they exit.
|
|
break;
|
|
}
|
|
fflush_and_check();
|
|
fputs("ready for more input\n", stderr);
|
|
}
|
|
|
|
bc_vec_pop_all(&buffer);
|
|
}
|
|
if (s == BC_STATUS_EOF) // input EOF (^D) is not an error
|
|
s = BC_STATUS_SUCCESS;
|
|
|
|
if (str) {
|
|
s = bc_error("string end could not be found");
|
|
}
|
|
else if (comment) {
|
|
s = bc_error("comment end could not be found");
|
|
}
|
|
|
|
bc_vec_free(&buf);
|
|
bc_vec_free(&buffer);
|
|
return s;
|
|
}
|
|
|
|
#if ENABLE_BC
|
|
static const char bc_lib[] = {
|
|
"scale=20"
|
|
"\n" "define e(x){"
|
|
"\n" "auto b,s,n,r,d,i,p,f,v"
|
|
"\n" "b=ibase"
|
|
"\n" "ibase=A"
|
|
"\n" "if(x<0){"
|
|
"\n" "n=1"
|
|
"\n" "x=-x"
|
|
"\n" "}"
|
|
"\n" "s=scale"
|
|
"\n" "r=6+s+0.44*x"
|
|
"\n" "scale=scale(x)+1"
|
|
"\n" "while(x>1){"
|
|
"\n" "d+=1"
|
|
"\n" "x/=2"
|
|
"\n" "scale+=1"
|
|
"\n" "}"
|
|
"\n" "scale=r"
|
|
"\n" "r=x+1"
|
|
"\n" "p=x"
|
|
"\n" "f=v=1"
|
|
"\n" "for(i=2;v!=0;++i){"
|
|
"\n" "p*=x"
|
|
"\n" "f*=i"
|
|
"\n" "v=p/f"
|
|
"\n" "r+=v"
|
|
"\n" "}"
|
|
"\n" "while((d--)!=0)r*=r"
|
|
"\n" "scale=s"
|
|
"\n" "ibase=b"
|
|
"\n" "if(n!=0)return(1/r)"
|
|
"\n" "return(r/1)"
|
|
"\n" "}"
|
|
"\n" "define l(x){"
|
|
"\n" "auto b,s,r,p,a,q,i,v"
|
|
"\n" "b=ibase"
|
|
"\n" "ibase=A"
|
|
"\n" "if(x<=0){"
|
|
"\n" "r=(1-10^scale)/1"
|
|
"\n" "ibase=b"
|
|
"\n" "return(r)"
|
|
"\n" "}"
|
|
"\n" "s=scale"
|
|
"\n" "scale+=6"
|
|
"\n" "p=2"
|
|
"\n" "while(x>=2){"
|
|
"\n" "p*=2"
|
|
"\n" "x=sqrt(x)"
|
|
"\n" "}"
|
|
"\n" "while(x<=0.5){"
|
|
"\n" "p*=2"
|
|
"\n" "x=sqrt(x)"
|
|
"\n" "}"
|
|
"\n" "r=a=(x-1)/(x+1)"
|
|
"\n" "q=a*a"
|
|
"\n" "v=1"
|
|
"\n" "for(i=3;v!=0;i+=2){"
|
|
"\n" "a*=q"
|
|
"\n" "v=a/i"
|
|
"\n" "r+=v"
|
|
"\n" "}"
|
|
"\n" "r*=p"
|
|
"\n" "scale=s"
|
|
"\n" "ibase=b"
|
|
"\n" "return(r/1)"
|
|
"\n" "}"
|
|
"\n" "define s(x){"
|
|
"\n" "auto b,s,r,n,a,q,i"
|
|
"\n" "b=ibase"
|
|
"\n" "ibase=A"
|
|
"\n" "s=scale"
|
|
"\n" "scale=1.1*s+2"
|
|
"\n" "a=a(1)"
|
|
"\n" "if(x<0){"
|
|
"\n" "n=1"
|
|
"\n" "x=-x"
|
|
"\n" "}"
|
|
"\n" "scale=0"
|
|
"\n" "q=(x/a+2)/4"
|
|
"\n" "x=x-4*q*a"
|
|
"\n" "if(q%2!=0)x=-x"
|
|
"\n" "scale=s+2"
|
|
"\n" "r=a=x"
|
|
"\n" "q=-x*x"
|
|
"\n" "for(i=3;a!=0;i+=2){"
|
|
"\n" "a*=q/(i*(i-1))"
|
|
"\n" "r+=a"
|
|
"\n" "}"
|
|
"\n" "scale=s"
|
|
"\n" "ibase=b"
|
|
"\n" "if(n!=0)return(-r/1)"
|
|
"\n" "return(r/1)"
|
|
"\n" "}"
|
|
"\n" "define c(x){"
|
|
"\n" "auto b,s"
|
|
"\n" "b=ibase"
|
|
"\n" "ibase=A"
|
|
"\n" "s=scale"
|
|
"\n" "scale*=1.2"
|
|
"\n" "x=s(2*a(1)+x)"
|
|
"\n" "scale=s"
|
|
"\n" "ibase=b"
|
|
"\n" "return(x/1)"
|
|
"\n" "}"
|
|
"\n" "define a(x){"
|
|
"\n" "auto b,s,r,n,a,m,t,f,i,u"
|
|
"\n" "b=ibase"
|
|
"\n" "ibase=A"
|
|
"\n" "n=1"
|
|
"\n" "if(x<0){"
|
|
"\n" "n=-1"
|
|
"\n" "x=-x"
|
|
"\n" "}"
|
|
"\n" "if(x==1){"
|
|
"\n" "if(scale<65){"
|
|
"\n" "return(.7853981633974483096156608458198757210492923498437764552437361480/n)"
|
|
"\n" "}"
|
|
"\n" "}"
|
|
"\n" "if(x==.2){"
|
|
"\n" "if(scale<65){"
|
|
"\n" "return(.1973955598498807583700497651947902934475851037878521015176889402/n)"
|
|
"\n" "}"
|
|
"\n" "}"
|
|
"\n" "s=scale"
|
|
"\n" "if(x>.2){"
|
|
"\n" "scale+=5"
|
|
"\n" "a=a(.2)"
|
|
"\n" "}"
|
|
"\n" "scale=s+3"
|
|
"\n" "while(x>.2){"
|
|
"\n" "m+=1"
|
|
"\n" "x=(x-.2)/(1+.2*x)"
|
|
"\n" "}"
|
|
"\n" "r=u=x"
|
|
"\n" "f=-x*x"
|
|
"\n" "t=1"
|
|
"\n" "for(i=3;t!=0;i+=2){"
|
|
"\n" "u*=f"
|
|
"\n" "t=u/i"
|
|
"\n" "r+=t"
|
|
"\n" "}"
|
|
"\n" "scale=s"
|
|
"\n" "ibase=b"
|
|
"\n" "return((m*a+r)/n)"
|
|
"\n" "}"
|
|
"\n" "define j(n,x){"
|
|
"\n" "auto b,s,o,a,i,v,f"
|
|
"\n" "b=ibase"
|
|
"\n" "ibase=A"
|
|
"\n" "s=scale"
|
|
"\n" "scale=0"
|
|
"\n" "n/=1"
|
|
"\n" "if(n<0){"
|
|
"\n" "n=-n"
|
|
"\n" "if(n%2==1)o=1"
|
|
"\n" "}"
|
|
"\n" "a=1"
|
|
"\n" "for(i=2;i<=n;++i)a*=i"
|
|
"\n" "scale=1.5*s"
|
|
"\n" "a=(x^n)/2^n/a"
|
|
"\n" "r=v=1"
|
|
"\n" "f=-x*x/4"
|
|
"\n" "scale=scale+length(a)-scale(a)"
|
|
"\n" "for(i=1;v!=0;++i){"
|
|
"\n" "v=v*f/i/(n+i)"
|
|
"\n" "r+=v"
|
|
"\n" "}"
|
|
"\n" "scale=s"
|
|
"\n" "ibase=b"
|
|
"\n" "if(o!=0)a=-a"
|
|
"\n" "return(a*r/1)"
|
|
"\n" "}"
|
|
};
|
|
#endif // ENABLE_BC
|
|
|
|
static BcStatus bc_vm_exec(void)
|
|
{
|
|
BcStatus s;
|
|
size_t i;
|
|
|
|
#if ENABLE_BC
|
|
if (option_mask32 & BC_FLAG_L) {
|
|
|
|
// We know that internal library is not buggy,
|
|
// thus error checking is normally disabled.
|
|
# define DEBUG_LIB 0
|
|
bc_lex_file(&G.prs.l);
|
|
s = bc_parse_text(&G.prs, bc_lib);
|
|
if (DEBUG_LIB && s) return s;
|
|
|
|
while (G.prs.l.t.t != BC_LEX_EOF) {
|
|
s = G.prs.parse(&G.prs);
|
|
if (DEBUG_LIB && s) return s;
|
|
}
|
|
s = bc_program_exec();
|
|
if (DEBUG_LIB && s) return s;
|
|
}
|
|
#endif
|
|
|
|
s = BC_STATUS_SUCCESS;
|
|
for (i = 0; !s && i < G.files.len; ++i)
|
|
s = bc_vm_file(*((char **) bc_vec_item(&G.files, i)));
|
|
if (ENABLE_FEATURE_CLEAN_UP && s && !G_ttyin) {
|
|
// Debug config, non-interactive mode:
|
|
// return all the way back to main.
|
|
// Non-debug builds do not come here, they exit.
|
|
return s;
|
|
}
|
|
|
|
if (IS_BC || (option_mask32 & BC_FLAG_I)) {
|
|
if (s) {
|
|
fflush_and_check();
|
|
fputs("ready for more input\n", stderr);
|
|
}
|
|
s = bc_vm_stdin();
|
|
}
|
|
|
|
if (!s && !BC_PARSE_CAN_EXEC(&G.prs))
|
|
s = bc_vm_process("");
|
|
|
|
return s;
|
|
}
|
|
|
|
#if ENABLE_FEATURE_CLEAN_UP
|
|
static void bc_program_free(void)
|
|
{
|
|
bc_num_free(&G.prog.ib);
|
|
bc_num_free(&G.prog.ob);
|
|
bc_num_free(&G.prog.hexb);
|
|
# if ENABLE_DC
|
|
bc_num_free(&G.prog.strmb);
|
|
# endif
|
|
bc_vec_free(&G.prog.fns);
|
|
bc_vec_free(&G.prog.fn_map);
|
|
bc_vec_free(&G.prog.vars);
|
|
bc_vec_free(&G.prog.var_map);
|
|
bc_vec_free(&G.prog.arrs);
|
|
bc_vec_free(&G.prog.arr_map);
|
|
bc_vec_free(&G.prog.strs);
|
|
bc_vec_free(&G.prog.consts);
|
|
bc_vec_free(&G.prog.results);
|
|
bc_vec_free(&G.prog.stack);
|
|
bc_num_free(&G.prog.last);
|
|
bc_num_free(&G.prog.zero);
|
|
bc_num_free(&G.prog.one);
|
|
}
|
|
|
|
static void bc_vm_free(void)
|
|
{
|
|
bc_vec_free(&G.files);
|
|
bc_program_free();
|
|
bc_parse_free(&G.prs);
|
|
free(G.env_args);
|
|
}
|
|
#endif
|
|
|
|
static void bc_program_init(void)
|
|
{
|
|
size_t idx;
|
|
BcInstPtr ip;
|
|
|
|
/* memset(&G.prog, 0, sizeof(G.prog)); - already is */
|
|
memset(&ip, 0, sizeof(BcInstPtr));
|
|
|
|
/* G.prog.nchars = G.prog.scale = 0; - already is */
|
|
|
|
bc_num_init(&G.prog.ib, BC_NUM_DEF_SIZE);
|
|
bc_num_ten(&G.prog.ib);
|
|
G.prog.ib_t = 10;
|
|
|
|
bc_num_init(&G.prog.ob, BC_NUM_DEF_SIZE);
|
|
bc_num_ten(&G.prog.ob);
|
|
G.prog.ob_t = 10;
|
|
|
|
bc_num_init(&G.prog.hexb, BC_NUM_DEF_SIZE);
|
|
bc_num_ten(&G.prog.hexb);
|
|
G.prog.hexb.num[0] = 6;
|
|
|
|
#if ENABLE_DC
|
|
bc_num_init(&G.prog.strmb, BC_NUM_DEF_SIZE);
|
|
bc_num_ulong2num(&G.prog.strmb, UCHAR_MAX + 1);
|
|
#endif
|
|
|
|
bc_num_init(&G.prog.last, BC_NUM_DEF_SIZE);
|
|
bc_num_zero(&G.prog.last);
|
|
|
|
bc_num_init(&G.prog.zero, BC_NUM_DEF_SIZE);
|
|
bc_num_zero(&G.prog.zero);
|
|
|
|
bc_num_init(&G.prog.one, BC_NUM_DEF_SIZE);
|
|
bc_num_one(&G.prog.one);
|
|
|
|
bc_vec_init(&G.prog.fns, sizeof(BcFunc), bc_func_free);
|
|
bc_vec_init(&G.prog.fn_map, sizeof(BcId), bc_id_free);
|
|
|
|
bc_program_addFunc(xstrdup("(main)"), &idx);
|
|
bc_program_addFunc(xstrdup("(read)"), &idx);
|
|
|
|
bc_vec_init(&G.prog.vars, sizeof(BcVec), bc_vec_free);
|
|
bc_vec_init(&G.prog.var_map, sizeof(BcId), bc_id_free);
|
|
|
|
bc_vec_init(&G.prog.arrs, sizeof(BcVec), bc_vec_free);
|
|
bc_vec_init(&G.prog.arr_map, sizeof(BcId), bc_id_free);
|
|
|
|
bc_vec_init(&G.prog.strs, sizeof(char *), bc_string_free);
|
|
bc_vec_init(&G.prog.consts, sizeof(char *), bc_string_free);
|
|
bc_vec_init(&G.prog.results, sizeof(BcResult), bc_result_free);
|
|
bc_vec_init(&G.prog.stack, sizeof(BcInstPtr), NULL);
|
|
bc_vec_push(&G.prog.stack, &ip);
|
|
}
|
|
|
|
static int bc_vm_init(const char *env_len)
|
|
{
|
|
#if ENABLE_FEATURE_EDITING
|
|
G.line_input_state = new_line_input_t(DO_HISTORY);
|
|
#endif
|
|
G.prog.len = bc_vm_envLen(env_len);
|
|
|
|
bc_vec_init(&G.files, sizeof(char *), NULL);
|
|
if (IS_BC)
|
|
IF_BC(bc_vm_envArgs();)
|
|
bc_program_init();
|
|
if (IS_BC) {
|
|
IF_BC(bc_parse_init(&G.prs, BC_PROG_MAIN);)
|
|
} else {
|
|
IF_DC(dc_parse_init(&G.prs, BC_PROG_MAIN);)
|
|
}
|
|
|
|
if (isatty(0)) {
|
|
#if ENABLE_FEATURE_BC_SIGNALS
|
|
G_ttyin = 1;
|
|
// With SA_RESTART, most system calls will restart
|
|
// (IOW: they won't fail with EINTR).
|
|
// In particular, this means ^C won't cause
|
|
// stdout to get into "error state" if SIGINT hits
|
|
// within write() syscall.
|
|
// The downside is that ^C while line input is taken
|
|
// will only be handled after [Enter] since read()
|
|
// from stdin is not interrupted by ^C either,
|
|
// it restarts, thus fgetc() does not return on ^C.
|
|
signal_SA_RESTART_empty_mask(SIGINT, record_signo);
|
|
|
|
// Without SA_RESTART, this exhibits a bug:
|
|
// "while (1) print 1" and try ^C-ing it.
|
|
// Intermittently, instead of returning to input line,
|
|
// you'll get "output error: Interrupted system call"
|
|
// and exit.
|
|
//signal_no_SA_RESTART_empty_mask(SIGINT, record_signo);
|
|
#endif
|
|
return 1; // "tty"
|
|
}
|
|
return 0; // "not a tty"
|
|
}
|
|
|
|
static BcStatus bc_vm_run(void)
|
|
{
|
|
BcStatus st = bc_vm_exec();
|
|
#if ENABLE_FEATURE_CLEAN_UP
|
|
if (G_exiting) // it was actually "halt" or "quit"
|
|
st = EXIT_SUCCESS;
|
|
bc_vm_free();
|
|
# if ENABLE_FEATURE_EDITING
|
|
free_line_input_t(G.line_input_state);
|
|
# endif
|
|
FREE_G();
|
|
#endif
|
|
return st;
|
|
}
|
|
|
|
#if ENABLE_BC
|
|
int bc_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
|
|
int bc_main(int argc UNUSED_PARAM, char **argv)
|
|
{
|
|
int is_tty;
|
|
|
|
INIT_G();
|
|
G.sbgn = G.send = '"';
|
|
|
|
is_tty = bc_vm_init("BC_LINE_LENGTH");
|
|
|
|
bc_args(argv);
|
|
|
|
if (is_tty && !(option_mask32 & BC_FLAG_Q))
|
|
bc_vm_info();
|
|
|
|
return bc_vm_run();
|
|
}
|
|
#endif
|
|
|
|
#if ENABLE_DC
|
|
int dc_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
|
|
int dc_main(int argc UNUSED_PARAM, char **argv)
|
|
{
|
|
int noscript;
|
|
|
|
INIT_G();
|
|
G.sbgn = '[';
|
|
G.send = ']';
|
|
// TODO: dc (GNU bc 1.07.1) 1.4.1 seems to use default width
|
|
// 1 char narrower than bc from the same package. Do the same?
|
|
bc_vm_init("DC_LINE_LENGTH");
|
|
|
|
// Run -e'SCRIPT' and -fFILE in order of appearance, then handle FILEs
|
|
noscript = BC_FLAG_I;
|
|
for (;;) {
|
|
int n = getopt(argc, argv, "e:f:x");
|
|
if (n <= 0)
|
|
break;
|
|
switch (n) {
|
|
case 'e':
|
|
noscript = 0;
|
|
n = bc_vm_process(optarg);
|
|
if (n) return n;
|
|
break;
|
|
case 'f':
|
|
noscript = 0;
|
|
bc_vm_file(optarg);
|
|
break;
|
|
case 'x':
|
|
option_mask32 |= DC_FLAG_X;
|
|
break;
|
|
default:
|
|
bb_show_usage();
|
|
}
|
|
}
|
|
argv += optind;
|
|
|
|
while (*argv) {
|
|
noscript = 0;
|
|
bc_vec_push(&G.files, argv++);
|
|
}
|
|
|
|
option_mask32 |= noscript; // set BC_FLAG_I if we need to interpret stdin
|
|
|
|
return bc_vm_run();
|
|
}
|
|
#endif
|
|
|
|
#endif // not DC_SMALL
|