Commit Graph

349 Commits

Author SHA1 Message Date
Denys Vlasenko
4b72aebe80 bc: remove "error after expression parsing" check
It is misplaced: caller knows better what can or cannot follow the expression.
Sometimes even caller's caller: "if (1) return a+b else..." -
parser of "return" does not know that "else" after it is valid,
parser of stmt does not know it either, - only parser of
"if" knows it!

The removed code balked on e.g. "{ print 1 }" statement.

This does not break any valid programs, but starts accepting some
invalid ones, e.g. "print 1 print 2" would work.

function                                             old     new   delta
zcommon_parse_expr                                    40      32      -8
zbc_parse_name                                       509     494     -15
zbc_parse_stmt_possibly_auto                        1678    1638     -40
bc_parse_expr_empty_ok                              2025    1977     -48
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/4 up/down: 0/-111)           Total: -111 bytes
   text	   data	    bss	    dec	    hex	filename
 981599	    485	   7296	 989380	  f18c4	busybox_old
 981488	    485	   7296	 989269	  f1855	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-17 17:00:29 +01:00
Denys Vlasenko
b44a7f1d66 bc: tighten up input NUL handling
function                                             old     new   delta
static.dc_lex_tokens                                   -      90     +90
bc_error_bad_character                                17      31     +14
static.dc_lex_regs                                     -      13     +13
bc_read_line                                         406     410      +4
bc_program_index                                      64      66      +2
dc_lex_regs                                           13       -     -13
zdc_parse_expr                                       671     656     -15
zbc_lex_next                                        2318    2230     -88
dc_lex_tokens                                         91       -     -91
------------------------------------------------------------------------------
(add/remove: 2/2 grow/shrink: 3/2 up/down: 123/-207)          Total: -84 bytes
   text	   data	    bss	    dec	    hex	filename
 981667	    485	   7296	 989448	  f1908	busybox_old
 981599	    485	   7296	 989380	  f18c4	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-17 11:58:20 +01:00
Denys Vlasenko
e42cc19b51 bc: simplify zdc_parse_string()
function                                             old     new   delta
bc_program_index                                      64      66      +2
zdc_parse_expr                                       671     656     -15
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/1 up/down: 2/-15)             Total: -13 bytes
   text	   data	    bss	    dec	    hex	filename
 981667	    485	   7296	 989448	  f1908	busybox_old
 981655	    485	   7296	 989436	  f18fc	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-17 11:02:26 +01:00
Denys Vlasenko
59d4ce935e bc: use common strings
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-17 10:42:31 +01:00
Denys Vlasenko
ec60318f15 bc: tidy up "z-function" macro machinery
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-17 10:34:02 +01:00
Denys Vlasenko
e4ba4c4371 bc: parse file arguments piecemeal (do not read entire file)
function                                             old     new   delta
bc_read_line                                         336     406     +70
zbc_vm_execute_FILE                                    -      67     +67
zbc_lex_next                                        2309    2318      +9
zbc_program_exec                                    4002    4008      +6
bc_program_index                                      66      64      -2
bc_vm_run                                            139     124     -15
zbc_vm_file                                          208      32    -176
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 3/3 up/down: 152/-193)          Total: -41 bytes
   text	   data	    bss	    dec	    hex	filename
 981736	    485	   7296	 989517	  f194d	busybox_old
 981667	    485	   7296	 989448	  f1908	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-17 09:51:43 +01:00
Denys Vlasenko
c5774a3458 bc: move fflush to the _actual_ execution loop
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-17 01:22:53 +01:00
Denys Vlasenko
51b22b1bce bc: fix typo: defone -> define
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-17 00:15:35 +01:00
Denys Vlasenko
94f72a387c bc: factor out common code
function                                             old     new   delta
zbc_parse_stmt_allow_NLINE_before                      -      59     +59
bc_parse_pushJUMP_ZERO                                 -      27     +27
bc_parse_pushJUMP                                      -      27     +27
rewrite_label_to_current                               -      19     +19
zbc_vm_process                                       594     599      +5
zbc_lex_next_and_skip_NLINE                           22       -     -22
zbc_parse_stmt_fail_if_bare_NLINE                     28       -     -28
zbc_parse_stmt_possibly_auto                        1909    1678    -231
------------------------------------------------------------------------------
(add/remove: 4/2 grow/shrink: 1/1 up/down: 137/-281)         Total: -144 bytes
   text	   data	    bss	    dec	    hex	filename
 981879	    485	   7296	 989660	  f19dc	busybox_old
 981755	    485	   7296	 989536	  f1960	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-17 00:07:48 +01:00
Denys Vlasenko
5ebd2a6128 bc: remove use of "BcInstPtr ip" object from loop parsing
function                                             old     new   delta
zbc_parse_stmt_possibly_auto                        1964    1909     -55
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/1 up/down: 0/-55)             Total: -55 bytes
   text	   data	    bss	    dec	    hex	filename
 981934	    485	   7296	 989715	  f1a13	busybox_old
 981879	    485	   7296	 989660	  f19dc	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-16 23:35:04 +01:00
Denys Vlasenko
266aa00012 bc: store only index in p->exits, it's the only thing used there
function                                             old     new   delta
zbc_parse_stmt_possibly_auto                        1967    1964      -3
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/1 up/down: 0/-3)               Total: -3 bytes
   text	   data	    bss	    dec	    hex	filename
 981937	    485	   7296	 989718	  f1a16	busybox_old
 981934	    485	   7296	 989715	  f1a13	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-16 23:24:25 +01:00
Denys Vlasenko
8e7686e457 bc: p->exits.func is never zero, do not check for that
function                                             old     new   delta
zbc_parse_stmt_possibly_auto                        1978    1967     -11
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/1 up/down: 0/-11)             Total: -11 bytes
   text	   data	    bss	    dec	    hex	filename
 981948	    485	   7296	 989729	  f1a21	busybox_old
 981937	    485	   7296	 989718	  f1a16	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-16 23:18:28 +01:00
Denys Vlasenko
de24e9d366 bc: remove redundant JUMP generation when parsing 'while'
function                                             old     new   delta
zbc_parse_stmt_possibly_auto                        2065    2025     -40
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/1 up/down: 0/-40)             Total: -40 bytes
   text	   data	    bss	    dec	    hex	filename
 982035	    485	   7296	 989816	  f1a78	busybox_old
 981995	    485	   7296	 989776	  f1a50	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-16 23:02:22 +01:00
Denys Vlasenko
06ade77002 bc: simplify use of "ip" in loop parsing functions
function                                             old     new   delta
zbc_parse_stmt_possibly_auto                        2106    2065     -41
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/1 up/down: 0/-41)             Total: -41 bytes
   text	   data	    bss	    dec	    hex	filename
 982076	    485	   7296	 989857	  f1aa1	busybox_old
 982035	    485	   7296	 989816	  f1a78	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-16 22:44:51 +01:00
Denys Vlasenko
146a79d19c bc: shring bc_lib[]
function                                             old     new   delta
bc_lib                                              1586    1584      -2

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-16 21:46:11 +01:00
Denys Vlasenko
15850832be bc: shrink zbc_parse_if() a bit more
function                                             old     new   delta
zbc_parse_stmt_possibly_auto                        2180    2106     -74
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/1 up/down: 0/-74)             Total: -74 bytes
   text	   data	    bss	    dec	    hex	filename
 982152	    485	   7296	 989933	  f1aed	busybox_old
 982078	    485	   7296	 989859	  f1aa3	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-16 21:41:17 +01:00
Denys Vlasenko
6b5b46f817 bc: stop using p->exits when parsing if()
function                                             old     new   delta
zbc_parse_stmt_possibly_auto                        2180    2138     -42

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-16 21:29:08 +01:00
Denys Vlasenko
7415633128 bc: preparation to stop using p->exits when parsing if()
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-16 21:21:27 +01:00
Denys Vlasenko
5d18f6be90 bc: fix "print 1,2,3" parsing
function                                             old     new   delta
zbc_parse_stmt_possibly_auto                        2245    2180     -65
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/1 up/down: 0/-65)             Total: -65 bytes
   text	   data	    bss	    dec	    hex	filename
 982237	    485	   7296	 990018	  f1b42	busybox_old
 982152	    485	   7296	 989933	  f1aed	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-16 21:08:30 +01:00
Denys Vlasenko
cb18b546f7 bc: disallow empty statement as function body
$ bc
	define z() <cr>
	<cr>
	bc: no statement after 'define'

function                                             old     new   delta
zbc_parse_stmt_possibly_auto                        2239    2245      +6
zbc_vm_process                                       589     594      +5
zbc_parse_stmt_fail_if_bare_NLINE                     25      28      +3
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 3/0 up/down: 14/0)               Total: 14 bytes
   text	   data	    bss	    dec	    hex	filename
 982216	    485	   7296	 989997	  f1b2d	busybox_old
 982237	    485	   7296	 990018	  f1b42	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-16 20:46:15 +01:00
Denys Vlasenko
2e8be023cb bc: allow only one <newline> between if() and stmt
Attempt to have more than one causes this error message:

	$ bc -q
	if (1)<cr>
	<cr>
	bc: no statement after 'if'

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-16 20:41:32 +01:00
Denys Vlasenko
e6c40c48d9 bc: simplify bc_parse_pushName(), do not free name in it - avoids one strdup
function                                             old     new   delta
zbc_parse_name                                       511     509      -2
zdc_parse_register                                    50      43      -7
bc_parse_pushName                                     61      39     -22
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/3 up/down: 0/-31)             Total: -31 bytes
   text	   data	    bss	    dec	    hex	filename
 982183	    485	   7296	 989964	  f1b0c	busybox_old
 982152	    485	   7296	 989933	  f1aed	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-16 20:32:58 +01:00
Denys Vlasenko
563d93c9a4 bc: simplify zbc_parse_break_or_continue(), logic is the same
function                                             old     new   delta
zbc_parse_stmt_possibly_auto                        2259    2224     -35
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/1 up/down: 0/-35)             Total: -35 bytes
   text	   data	    bss	    dec	    hex	filename
 982218	    485	   7296	 989999	  f1b2f	busybox_old
 982183	    485	   7296	 989964	  f1b0c	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-16 19:47:40 +01:00
Denys Vlasenko
a50576a415 bc: fold zbc_parse_else() into its only caller
While at it, allow newline between "else" and its body

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-16 19:21:57 +01:00
Denys Vlasenko
6d29879c67 bc: fold bc_parse_noElse() into its only caller
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-16 19:10:38 +01:00
Denys Vlasenko
9dc5d08baa bc: delete unused (write-only) BcParse::nbraces member
function                                             old     new   delta
zbc_lex_next                                        2296    2309     +13
bc_parse_expr_empty_ok                              2021    2025      +4
bc_vm_init                                           760     757      -3
bc_num_printNewline                                   54      51      -3
zbc_num_divmod                                       156     150      -6
bc_parse_reset                                       113     106      -7
zbc_lex_number                                       200     192      -8
bc_parse_number                                       83      66     -17
zdc_parse_expr                                       707     671     -36
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 2/7 up/down: 17/-80)            Total: -63 bytes
   text	   data	    bss	    dec	    hex	filename
 982275	    485	   7296	 990056	  f1b68	busybox_old
 982212	    485	   7296	 989993	  f1b29	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-16 18:43:51 +01:00
Denys Vlasenko
202dd1943c bc: fixes for multi-line if/while/for
function                                             old     new   delta
zbc_vm_process                                       561     589     +28
zbc_lex_next_and_skip_NLINE                            -      22     +22
zbc_parse_stmt_possibly_auto                        2232    2253     +21
zbc_lex_skip_if_at_NLINE                               -      14     +14
zbc_lex_number                                       192     200      +8
zbc_num_divmod                                       150     156      +6
bc_vm_run                                            134     139      +5
bc_vm_init                                           757     760      +3
bc_num_printNewline                                   51      54      +3
------------------------------------------------------------------------------
(add/remove: 2/0 grow/shrink: 7/0 up/down: 110/0)             Total: 110 bytes
   text	   data	    bss	    dec	    hex	filename
 982138	    485	   7296	 989919	  f1adf	busybox_old
 982275	    485	   7296	 990056	  f1b68	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-16 17:30:35 +01:00
Denys Vlasenko
e9519e44a6 bc: fix handling of 'return' not in functions, and 'define f()<newline>{...}'
function                                             old     new   delta
zbc_vm_process                                       561     597     +36
zbc_parse_stmt_possibly_auto                        2232    2253     +21
zbc_lex_number                                       192     200      +8
zbc_num_divmod                                       150     156      +6
bc_vm_run                                            134     139      +5
bc_vm_init                                           757     760      +3
bc_num_printNewline                                   51      54      +3
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 7/0 up/down: 82/0)               Total: 82 bytes
   text	   data	    bss	    dec	    hex	filename
 982138	    485	   7296	 989919	  f1adf	busybox_old
 982247	    485	   7296	 990028	  f1b4c	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-16 17:06:07 +01:00
Denys Vlasenko
d1d29b4245 bc: partially rewrite parser, tests pass, ^C might be broken now
The entire control construct (if/while/for/funcdef) or {} block is
"eaten" by the corresponding parsing function, instead of maintaining
special "block flag stack" with magic bits in it, and returning to main
input loop after every inner statement (every input line, essentially).

This required moving line input deep into lexer - now zbc_lex_next()
triggers more reading when needed.

"block flag stack" is gone.

Correctness of ^C handling wasn't checked, might need fixing now.

if/else syntax is changed to match GNU bc: "else" can not be on
the next line (the rationale is that "if (1) 2" statement in interactive
mode should execute and print 2 instead of waiting for possible
"else ..." line).

This change fixes the following examples:

if (1) if (1) 1 else 2 else 3

if (0) 1 else if (1) 2

define w() { auto z; return 1; }

function                                             old     new   delta
zbc_parse_stmt_possibly_auto                           -    2232   +2232
zbc_vm_process                                        89     561    +472
zbc_lex_next                                        1982    2296    +314
bc_vm_init                                           749     757      +8
bc_parse_expr_empty_ok                              2016    2021      +5
bc_num_printNewline                                   54      51      -3
zbc_program_read                                     289     280      -9
bc_parse_free                                         47      38      -9
bc_parse_reset                                       126     113     -13
bc_parse_create                                      108      92     -16
bc_parse_push_block_flag                              47       -     -47
bc_parse_noElse                                       48       -     -48
zbc_parse_text_init                                  113      59     -54
zbc_parse_body                                       121       -    -121
zbc_parse_else                                       125       -    -125
zbc_parse_endBody                                    254       -    -254
bc_vm_run                                            421     134    -287
zbc_parse_auto                                       290       -    -290
zcommon_parse                                        476       -    -476
zbc_parse_stmt                                      1682       7   -1675
------------------------------------------------------------------------------
(add/remove: 1/7 grow/shrink: 4/8 up/down: 3031/-3427)       Total: -396 bytes
   text	   data	    bss	    dec	    hex	filename
 982586	    485	   7296	 990367	  f1c9f	busybox_old
 982138	    485	   7296	 989919	  f1adf	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-16 16:10:38 +01:00
Denys Vlasenko
99b3762335 bc: lexer debugging, added some failing test cases
function                                             old     new   delta
bc_parse_push_block_flag                               -      47     +47
zbc_parse_body                                       107     121     +14
zbc_num_divmod                                       156     150      -6
zbc_lex_number                                       200     192      -8
zbc_parse_endBody                                    264     254     -10
bc_parse_startBody                                    47       -     -47
------------------------------------------------------------------------------
(add/remove: 1/1 grow/shrink: 1/3 up/down: 61/-71)            Total: -10 bytes
   text	   data	    bss	    dec	    hex	filename
 982596	    485	   7296	 990377	  f1ca9	busybox_old
 982586	    485	   7296	 990367	  f1c9f	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-15 20:06:59 +01:00
Denys Vlasenko
fd51e0c4d2 bc: simplify BC_INST_JUMP[_ZERO] handling
function                                             old     new   delta
zbc_program_exec                                    4063    4050     -13

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-15 15:07:14 +01:00
Denys Vlasenko
7db384338a bc: rewrite "block flag stack" using simple realloc'ed byte array
Each access to current top flag took a function call + fetch of three data items
+ multiplication and some additions + and then following the resulting pointer.

After the change, it is: fetch pointer value + one byte access via this pointer.

function                                             old     new   delta
bc_parse_startBody                                    45      49      +4
bc_parse_free                                         46      47      +1
zbc_parse_auto                                       188     185      -3
bc_parse_push                                         14      11      -3
bc_vm_run                                            398     394      -4
zbc_vm_process                                        63      58      -5
zdc_parse_expr                                       638     632      -6
zbc_parse_body                                       101      95      -6
bc_parse_addFunc                                      31      25      -6
bc_parse_noElse                                       56      48      -8
zcommon_parse                                        341     331     -10
zbc_parse_else                                       134     123     -11
bc_parse_create                                      124     108     -16
zbc_parse_text_init                                  123     104     -19
zbc_parse_endBody                                    292     252     -40
zbc_parse_stmt                                      1479    1420     -59
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 2/14 up/down: 5/-196)          Total: -191 bytes
   text	   data	    bss	    dec	    hex	filename
 979880	    485	   7296	 987661	  f120d	busybox_old
 979689	    485	   7296	 987470	  f114e	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-15 00:49:16 +01:00
Denys Vlasenko
f10f17f8d3 bc: drop zbc_parse_endBody() bool parameter, move its code to caller which uses it
function                                             old     new   delta
zbc_parse_stmt                                      1456    1479     +23
zbc_parse_body                                       103     101      -2
zbc_parse_endBody                                    326     292     -34
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/2 up/down: 23/-36)            Total: -13 bytes
   text	   data	    bss	    dec	    hex	filename
 979893	    485	   7296	 987674	  f121a	busybox_old
 979880	    485	   7296	 987661	  f120d	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-14 23:41:33 +01:00
Denys Vlasenko
0154d78738 bc: shorten one message, make defines more readable
text	   data	    bss	    dec	    hex	filename
 979916	    485	   7296	 987697	  f1231	busybox_old
 979893	    485	   7296	 987674	  f121a	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-14 23:32:51 +01:00
Denys Vlasenko
7b1df3db97 bc: pull zbc_lex_next() call out of zbc_parse_operator() into one caller that uses it
function                                             old     new   delta
bc_parse_operator                                      -     144    +144
bc_parse_expr_empty_ok                              1788    1792      +4
zbc_parse_operator                                   170       -    -170
------------------------------------------------------------------------------
(add/remove: 1/1 grow/shrink: 1/0 up/down: 148/-170)          Total: -22 bytes
   text	   data	    bss	    dec	    hex	filename
 979938	    485	   7296	 987719	  f1247	busybox_old
 979916	    485	   7296	 987697	  f1231	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-14 23:12:48 +01:00
Denys Vlasenko
17df882a57 bx: add more debug scaffolding
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-14 23:00:24 +01:00
Denys Vlasenko
2ea53a45b7 bc: convert macro bc_parse_push() to function, add debug infrastructure
function                                             old     new   delta
bc_parse_push                                          -      14     +14
zbc_parse_else                                       132     134      +2
bc_parse_pushName                                     63      61      -2
zbc_parse_operator                                   174     170      -4
bc_parse_number                                       87      83      -4
zbc_parse_string                                      97      89      -8
bc_parse_pushIndex                                    68      60      -8
zbc_parse_endBody                                    339     326     -13
zbc_parse_name                                       401     387     -14
zdc_parse_mem                                        107      91     -16
zdc_parse_expr                                       680     638     -42
zbc_parse_stmt                                      1502    1456     -46
bc_parse_expr_empty_ok                              1838    1788     -50
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 1/11 up/down: 16/-207)         Total: -191 bytes
   text	   data	    bss	    dec	    hex	filename
 980129	    485	   7296	 987910	  f1306	busybox_old
 979938	    485	   7296	 987719	  f1247	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-14 17:51:17 +01:00
Denys Vlasenko
f86e960e7c bc: rename zbc_parse_text() to ..._init(), reuse existing code for library parsing
function                                             old     new   delta
zbc_parse_text_init                                    -     123    +123
bc_vm_run                                            423     398     -25
zbc_parse_text                                       123       -    -123
------------------------------------------------------------------------------
(add/remove: 1/1 grow/shrink: 0/1 up/down: 123/-148)          Total: -25 bytes
   text	   data	    bss	    dec	    hex	filename
 980154	    485	   7296	 987935	  f131f	busybox_old
 980129	    485	   7296	 987910	  f1306	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-14 17:02:27 +01:00
Denys Vlasenko
0a23814e98 bc: compress two constant arguments of bc_lex_assign() to one
function                                             old     new   delta
zbc_program_num                                      836     835      -1
bc_lex_assign                                         34      31      -3
zbc_lex_next                                        1930    1880     -50
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/3 up/down: 0/-54)             Total: -54 bytes
   text	   data	    bss	    dec	    hex	filename
 980208	    485	   7296	 987989	  f1355	busybox_old
 980154	    485	   7296	 987935	  f131f	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-14 16:48:34 +01:00
Denys Vlasenko
8226912b2c bc: remove stale comment, empty lines, regularize comment style
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-14 16:30:56 +01:00
Denys Vlasenko
87b49beeda bc: tweak bc_num_parseDecimal() for readability, logic is not changed
function                                             old     new   delta
zbc_program_num                                      836     835      -1

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-14 16:24:01 +01:00
Denys Vlasenko
240d7ee3fc bc: shrink s() in library again
function                                             old     new   delta
bc_lib                                              1596    1586     -10
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/1 up/down: 0/-10)             Total: -10 bytes
   text	   data	    bss	    dec	    hex	filename
 980152	    485	   7296	 987933	  f131d	busybox_old
 980142	    485	   7296	 987923	  f1313	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-14 11:27:09 +01:00
Denys Vlasenko
fc9d26902b bc: yet another library shrink
function                                             old     new   delta
bc_lib                                              1604    1596      -8
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/1 up/down: 0/-8)               Total: -8 bytes
   text	   data	    bss	    dec	    hex	filename
 980160	    485	   7296	 987941	  f1325	busybox_old
 980152	    485	   7296	 987933	  f131d	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-14 11:00:23 +01:00
Denys Vlasenko
c06537d9bb bc: shrink internal library yet more
function                                             old     new   delta
bc_lib                                              1609    1604      -5
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/1 up/down: 0/-5)               Total: -5 bytes
   text	   data	    bss	    dec	    hex	filename
 980165	    485	   7296	 987946	  f132a	busybox_old
 980160	    485	   7296	 987941	  f1325	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-14 10:10:37 +01:00
Denys Vlasenko
203210e253 bc: shrink internal library more
function                                             old     new   delta
bc_lib                                              1618    1609      -9

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-14 09:53:50 +01:00
Denys Vlasenko
3ac0c21a1f bc: shrink internal library
function                                             old     new   delta
bc_lib                                              1674    1618     -56

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-14 01:01:01 +01:00
Denys Vlasenko
57b6918b0a bc: group ENABLE_BC code a bit better, no logic changes
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-14 00:12:13 +01:00
Denys Vlasenko
5f263f406c bc: fix "dc only" bug
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-13 22:49:59 +01:00
Denys Vlasenko
e755e30402 bc: unbreak "only bc" and "only dc" configs
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-13 22:25:28 +01:00
Denys Vlasenko
89198a9e5d bc: simplify bc_lex_whitespace()
function                                             old     new   delta
bc_lex_whitespace                                     52      41     -11

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-13 21:31:29 +01:00
Denys Vlasenko
bbcecc4118 bc: G.sbgn and G.send are unused, remove them
function                                             old     new   delta
bc_program_index                                      66      64      -2
bc_parse_expr_empty_ok                              1840    1838      -2
dc_main                                              176     168      -8
bc_main                                               73      65      -8
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/4 up/down: 0/-20)             Total: -20 bytes
   text	   data	    bss	    dec	    hex	filename
 980327	    485	   7296	 988108	  f13cc	busybox_old
 980307	    485	   7296	 988088	  f13b8	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-13 21:17:43 +01:00
Denys Vlasenko
0fe270e775 bc: simplify filename saving in zbc_vm_file()
function                                             old     new   delta
bc_vm_run                                            433     423     -10
zbc_vm_file                                          187     174     -13
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/2 up/down: 0/-23)             Total: -23 bytes
   text	   data	    bss	    dec	    hex	filename
 980350	    485	   7296	 988131	  f13e3	busybox_old
 980327	    485	   7296	 988108	  f13cc	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-13 19:58:58 +01:00
Denys Vlasenko
915c72b273 bc: do not append duplicate NUL, reduce indentation in bc_read_line()
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-13 19:29:02 +01:00
Denys Vlasenko
82ea67fbfa bc: change bc_read_line() and zbc_vm_stdin() to avoid double buffers
function                                             old     new   delta
bc_read_line                                         129     124      -5
bc_vm_run                                            523     433     -90
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/2 up/down: 0/-95)             Total: -95 bytes
   text	   data	    bss	    dec	    hex	filename
 980445	    485	   7296	 988226	  f1442	busybox_old
 980350	    485	   7296	 988131	  f13e3	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-13 19:24:42 +01:00
Denys Vlasenko
b7e61e3e4a bc: further simplification in zbc_vm_stdin()
function                                             old     new   delta
bc_vm_run                                            500     523     +23
bc_vec_concat                                         66       -     -66
------------------------------------------------------------------------------
(add/remove: 0/1 grow/shrink: 1/0 up/down: 23/-66)            Total: -43 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-13 18:16:39 +01:00
Denys Vlasenko
818b602c88 bc: fix another thinko
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-13 17:56:35 +01:00
Denys Vlasenko
335b4efd2f bc: fix a thinko: dc uses [] string delimiters, bot bc!
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-13 17:46:26 +01:00
Denys Vlasenko
766f67250f bc: fix comment handling
function                                             old     new   delta
bc_vm_run                                            514     513      -1

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-13 17:43:23 +01:00
Denys Vlasenko
7dc0a51286 bc: further zbc_vm_stdin() optimizations
function                                             old     new   delta
bc_vm_run                                            534     514     -20

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-13 17:36:41 +01:00
Denys Vlasenko
40534bb6e2 bc: shrink zbc_vm_stdin()
function                                             old     new   delta
bc_vm_run                                            592     534     -58

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-13 17:27:00 +01:00
Denys Vlasenko
89e785af98 bc: trim config help text, add a few comments, no code changes
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-13 16:35:52 +01:00
Denys Vlasenko
9811ad02bd bc: unbreak CONFIG_FEATURE_BC_SIGNALS=y config
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-12 23:25:13 +01:00
Denys Vlasenko
c2265f526e bc: remove lexer function pointer
function                                             old     new   delta
zbc_lex_next                                          81    1930   +1849
bc_parse_create                                      131     124      -7
common_parse_init                                     31       -     -31
zdc_lex_token                                        672       -    -672
zbc_lex_token                                       1193       -   -1193
------------------------------------------------------------------------------
(add/remove: 0/3 grow/shrink: 1/1 up/down: 1849/-1903)        Total: -54 bytes
   text	   data	    bss	    dec	    hex	filename
 980634	    485	   7296	 988415	  f14ff	busybox_old
 980580	    485	   7296	 988361	  f14c9	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-12 23:14:44 +01:00
Denys Vlasenko
c0ef23ca40 bc: remove parse function pointer
function                                             old     new   delta
zbc_program_asciify                                    -     372    +372
zcommon_parse                                          -     341    +341
zbc_program_printStream                                -     141    +141
zbc_program_pushArray                                  -     111    +111
zbc_program_nquit                                      -      92     +92
zbc_vm_process                                        61      63      +2
zbc_parse_text                                       122     123      +1
bc_vm_run                                            591     592      +1
zdc_parse_mem                                        108     107      -1
zbc_parse_operator                                   175     174      -1
zbc_parse_else                                       133     132      -1
zbc_parse_body                                       104     103      -1
zbc_program_read                                     261     259      -2
zdc_parse_register                                    40      37      -3
zbc_parse_string                                     100      97      -3
zbc_parse_endBody                                    343     339      -4
zdc_parse_expr                                       688     680      -8
zbc_parse_auto                                       198     188     -10
zbc_parse_name                                       414     401     -13
common_parse_init                                     45      31     -14
zdc_parse_parse                                       23       -     -23
bc_parse_create                                      158     131     -27
zbc_parse_stmt                                      1540    1502     -38
bc_parse_expr_empty_ok                              1882    1840     -42
zbc_program_exec                                    3963    3837    -126
zbc_parse_parse                                      311       -    -311
zbc_program_modexp                                   556       -    -556
------------------------------------------------------------------------------
(add/remove: 5/3 grow/shrink: 3/16 up/down: 1061/-1184)      Total: -123 bytes
   text	   data	    bss	    dec	    hex	filename
 980757	    485	   7296	 988538	  f157a	busybox_old
 980634	    485	   7296	 988415	  f14ff	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-12 23:03:10 +01:00
Denys Vlasenko
19f110751d bc: convert two more functions to "z" logic
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-12 22:48:19 +01:00
Denys Vlasenko
8a89247e0a bc: remove BC_STATUS_EOF (again), the condition is detectable as len==0
function                                             old     new   delta
bc_read_line                                         147     129     -18
bc_vm_run                                            618     591     -27
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/2 up/down: 0/-45)             Total: -45 bytes
   text	   data	    bss	    dec	    hex	filename
 980802	    485	   7296	 988583	  f15a7	busybox_old
 980757	    485	   7296	 988538	  f157a	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-12 22:43:58 +01:00
Denys Vlasenko
d8078a79be dc: fix EOF handling in case of last line being incomplete
This wasn't working correctly:

$ echo -ne '10 20+p' | dc
30

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-12 21:56:06 +01:00
Denys Vlasenko
d6ad3666dc bc: further conversions to "z" logic
function                                             old     new   delta
bc_program_exec                                     3876       -   -3876
zbc_program_exec                                       -    3963   +3963
bc_program_execStr                                   429       -    -429
zbc_program_execStr                                    -     427    +427
bc_vm_file                                           197       -    -197
zbc_vm_file                                            -     187    +187
bc_vm_process                                         74       -     -74
zbc_vm_process                                         -      61     +61
bc_parse_pushIndex                                    66      68      +2
bc_vm_run                                            624     618      -6
dc_main                                              187     176     -11
bc_program_reset                                      64       -     -64
zbc_program_pushArray                                111       -    -111
------------------------------------------------------------------------------
(add/remove: 4/6 grow/shrink: 1/2 up/down: 4640/-4768)       Total: -128 bytes
   text	   data	    bss	    dec	    hex	filename
 980922	    485	   7296	 988703	  f161f	busybox_old
 980794	    485	   7296	 988575	  f159f	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-12 21:39:10 +01:00
Denys Vlasenko
c2da68e896 bc: optimize bc_parse_pushIndex()
function                                             old     new   delta
bc_parse_pushIndex                                    80      68     -12

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-12 16:44:34 +01:00
Denys Vlasenko
26819db9a3 bc: convert even more of lexer functions to "z" convention
function                                             old     new   delta
bc_parse_name                                        416       -    -416
zbc_parse_name                                         -     414    +414
bc_parse_parse                                       305       -    -305
zbc_parse_parse                                        -     311    +311
bc_program_read                                      271       -    -271
zbc_program_read                                       -     261    +261
bc_parse_text                                        129       -    -129
zbc_parse_text                                         -     122    +122
dc_parse_parse                                        26       -     -26
zdc_parse_parse                                        -      23     +23
bc_program_index                                      66      64      -2
bc_vm_process                                         92      74     -18
bc_program_execStr                                   460     429     -31
bc_parse_expr_empty_ok                              1939    1882     -57
------------------------------------------------------------------------------
(add/remove: 5/5 grow/shrink: 0/4 up/down: 1131/-1255)       Total: -124 bytes
   text	   data	    bss	    dec	    hex	filename
 981058	    485	   7296	 988839	  f16a7	busybox_old
 980934	    485	   7296	 988715	  f162b	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-12 16:09:47 +01:00
Denys Vlasenko
ae0faf91d0 bc: convert even more of lexer functions to "z" convention
function                                             old     new   delta
bc_parse_stmt                                       1594       -   -1594
zbc_parse_stmt                                         -    1540   +1540
common_parse_expr                                     43       -     -43
zcommon_parse_expr                                     -      40     +40
bc_parse_expr                                         24       -     -24
zbc_parse_expr                                         -      24     +24
zbc_parse_body                                       108     104      -4
bc_program_read                                      277     271      -6
bc_program_execStr                                   468     460      -8
bc_parse_expr_empty_ok                              1955    1939     -16
bc_parse_name                                        451     416     -35
bc_parse_parse                                       476     305    -171
------------------------------------------------------------------------------
(add/remove: 3/3 grow/shrink: 0/6 up/down: 1604/-1901)       Total: -297 bytes
   text	   data	    bss	    dec	    hex	filename
 981355	    485	   7296	 989136	  f17d0	busybox_old
 981058	    485	   7296	 988839	  f16a7	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-12 15:19:54 +01:00
Denys Vlasenko
8cd468f604 bc: convert more of lexer functions to "z" convention
function                                             old     new   delta
dc_parse_expr                                        748       -    -748
zdc_parse_expr                                         -     688    +688
bc_parse_endBody                                     338       -    -338
zbc_parse_endBody                                      -     343    +343
bc_parse_auto                                        201       -    -201
zbc_parse_auto                                         -     198    +198
dc_parse_mem                                         115       -    -115
zdc_parse_mem                                          -     108    +108
bc_parse_body                                        116       -    -116
zbc_parse_body                                         -     108    +108
bc_parse_string                                      102       -    -102
zbc_parse_string                                       -     100    +100
dc_parse_register                                     43       -     -43
zdc_parse_register                                     -      40     +40
common_parse_expr                                     40      43      +3
bc_parse_parse                                       321     476    +155
bc_parse_stmt                                       1598    1594      -4
dc_parse_parse                                        44      26     -18
bc_parse_reset                                       153       -    -153
------------------------------------------------------------------------------
(add/remove: 7/8 grow/shrink: 2/2 up/down: 1743/-1838)        Total: -95 bytes
   text	   data	    bss	    dec	    hex	filename
 981450	    485	   7296	 989231	  f182f	busybox_old
 981355	    485	   7296	 989136	  f17d0	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-12 14:57:15 +01:00
Denys Vlasenko
9a34e89289 bc: partially convert lexer functions to "z" convention
function                                             old     new   delta
bc_lex_token                                        1228       -   -1228
zbc_lex_token                                          -    1193   +1193
dc_lex_token                                         674       -    -674
zdc_lex_token                                          -     672    +672
bc_parse_operator                                    177       -    -177
zbc_parse_operator                                     -     175    +175
bc_parse_else                                        133       -    -133
zbc_parse_else                                         -     133    +133
bc_lex_next                                           91       -     -91
zbc_lex_next                                           -      81     +81
dc_parse_expr                                        744     748      +4
bc_parse_string                                      100     102      +2
bc_parse_body                                        114     116      +2
dc_parse_mem                                         116     115      -1
bc_parse_text                                        130     129      -1
dc_parse_register                                     51      43      -8
bc_parse_endBody                                     358     338     -20
bc_parse_name                                        513     451     -62
bc_parse_auto                                        265     201     -64
bc_parse_expr_empty_ok                              2032    1955     -77
bc_parse_parse                                       417     321     -96
bc_parse_stmt                                       1753    1598    -155
------------------------------------------------------------------------------
(add/remove: 5/5 grow/shrink: 3/9 up/down: 2262/-2787)       Total: -525 bytes
   text	   data	    bss	    dec	    hex	filename
 981975	    485	   7296	 989756	  f1a3c	busybox_old
 981450	    485	   7296	 989231	  f182f	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-12 13:58:55 +01:00
Denys Vlasenko
251fbb57be bc: code shrink in bc_num_cmp()
function                                             old     new   delta
bc_num_cmp                                           275     231     -44

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-12 11:51:32 +01:00
Denys Vlasenko
16494f557f bc: simplify zbc_program_logical()
function                                             old     new   delta
bc_program_exec                                     3918    3876     -42
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/1 up/down: 0/-42)             Total: -42 bytes
   text	   data	    bss	    dec	    hex	filename
 982061	    485	   7296	 989842	  f1a92	busybox_old
 982019	    485	   7296	 989800	  f1a68	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-12 00:51:53 +01:00
Denys Vlasenko
69171dc466 bc: simplify nested read() check
function                                             old     new   delta
bc_vm_run                                            622     624      +2
dc_main                                              186     187      +1
bc_main                                               72      73      +1
bc_program_read                                      312     277     -35
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 3/1 up/down: 4/-35)             Total: -31 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-12 00:29:24 +01:00
Denys Vlasenko
12b9eaf787 bc: in non-interactive config, POSIX error functions never return nonzero
function                                             old     new   delta
bc_parse_expr_empty_ok                              2036    2032      -4
bc_parse_stmt                                       1767    1753     -14
bc_lex_token                                        1259    1228     -31
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/3 up/down: 0/-49)             Total: -49 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-11 23:50:14 +01:00
Denys Vlasenko
f0f069b08f bc: use common_parse_init() in bc_vm_init()
function                                             old     new   delta
common_parse_init                                     26      45     +19
dc_parse_init                                         17       -     -17
bc_parse_init                                         17       -     -17
bc_vm_init                                           744     725     -19
------------------------------------------------------------------------------
(add/remove: 0/2 grow/shrink: 1/1 up/down: 19/-53)            Total: -34 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-11 23:22:52 +01:00
Denys Vlasenko
4dd3652c2f bc: fix EOF handling in bc_program_read()
$ bc -q
read()
2^D^D2
     ^ prints the result of read()'ed expression

function                                             old     new   delta
zbc_program_print                                    629     642     +13
bc_program_read                                      322     312     -10
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/1 up/down: 13/-10)              Total: 3 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-11 22:45:15 +01:00
Denys Vlasenko
2c6f563216 bc: tweak comment
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-11 21:21:14 +01:00
Denys Vlasenko
c008a73762 bc: convert bc_program_asciify to "z" function
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-11 20:57:53 +01:00
Denys Vlasenko
9f657e0f7d bc: shrink bc_program_printString
function                                             old     new   delta
zbc_program_print                                    665     642     -23

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-11 19:52:25 +01:00
Denys Vlasenko
259137d0f0 bc: convert zbc_program_op to "z" function, fix a thinko in prev commits
function                                             old     new   delta
zbc_program_assign                                   448     447      -1

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-11 19:44:14 +01:00
Denys Vlasenko
728e7c9ecb bc: convert bc_program_logical to "z" function
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-11 19:37:00 +01:00
Denys Vlasenko
09d8df84ee bc: do not use "(cond ? f1 : f2)(params)" idiom, it messes up static function optimizations
With direct calls, GCC no longer thinks that we take addresses of the functions,
and can use "more optimal" internal ABI for _all_ calls to these functions,
not only at this callsite. On i486, regparm is used, and:

function                                             old     new   delta
zbc_num_inv                                           56      57      +1
zbc_num_k                                            852     851      -1
zbc_program_modexp                                   558     556      -2
zbc_num_d                                            541     539      -2
bc_num_ulong2num                                      59      57      -2
zbc_program_num                                      840     836      -4
bc_num_zero                                           11       7      -4
bc_num_one                                            28      24      -4
bc_program_exec                                     3928    3918     -10
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/8 up/down: 1/-29)             Total: -28 bytes
   text	   data	    bss	    dec	    hex	filename
 982237	    485	   7296	 990018	  f1b42	busybox_old
 982209	    485	   7296	 989990	  f1b26	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-11 19:33:09 +01:00
Denys Vlasenko
7f4daa4f58 bc: convert arithmetic calc functions to "z" logic
In order for magic macros to work, a bit of reordering was necessary.

function                                             old     new   delta
zbc_program_modexp                                     -     558    +558
zbc_program_assign                                     -     448    +448
zbc_program_pushArray                                  -     111    +111
zbc_num_s                                            239     237      -2
zbc_num_d                                            543     541      -2
zbc_num_binary                                       145     143      -2
zbc_num_a                                            443     441      -2
zbc_num_rem                                           95      91      -4
zbc_num_divmod                                       150     146      -4
zbc_num_m                                            269     257     -12
zbc_num_r                                            230     208     -22
zbc_num_printNum                                     447     417     -30
bc_program_exec                                     3960    3928     -32
zbc_num_p                                            434     399     -35
zbc_program_num                                      880     840     -40
zbc_num_k                                            913     852     -61
zbc_program_printStream                              141       -    -141
bc_program_assign                                    455       -    -455
bc_program_modexp                                    668       -    -668
------------------------------------------------------------------------------
(add/remove: 3/3 grow/shrink: 0/13 up/down: 1117/-1512)      Total: -395 bytes
   text	   data	    bss	    dec	    hex	filename
 982632	    485	   7296	 990413	  f1ccd	busybox_old
 982237	    485	   7296	 990018	  f1b42	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-11 19:22:04 +01:00
Denys Vlasenko
1aeacefbb3 bc: rename arithmetic calc functions to "z" functions, no code changes
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-11 19:12:13 +01:00
Denys Vlasenko
c2d15dff42 bc: move declarations around, no code changes
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-11 17:56:09 +01:00
Denys Vlasenko
c355c4a7d6 bc: code shrink in zbc_lex_number()
function                                             old     new   delta
zbc_lex_number                                       279     190     -89

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-11 17:36:21 +01:00
Denys Vlasenko
b402ff844c bc: make bc_program_pushVar "z-function"
function                                             old     new   delta
bc_program_pushVar                                   200     198      -2

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-11 15:45:15 +01:00
Denys Vlasenko
2930123279 bc: improve "noninteractive" macro machinery so that even "return zero" code is not generated
Most affected functions shrink by 2 bytes on x86.

function                                             old     new   delta
zbc_program_num                                        -     880    +880
zbc_program_print                                      -     665    +665
zbc_num_printNum                                       -     447    +447
zbc_program_call                                       -     323    +323
zbc_program_copyToVar                                  -     287    +287
zbc_lex_number                                         -     279    +279
zbc_program_binOpPrep                                  -     269    +269
zbc_program_assignStr                                  -     142    +142
zbc_program_printStream                                -     141    +141
zbc_func_insert                                        -      93     +93
zbc_num_ulong                                          -      88     +88
zbc_program_prep                                       -      79     +79
zbc_num_shift                                          -      53     +53
bc_num_shift                                          54       -     -54
bc_program_prep                                       81       -     -81
bc_num_ulong                                          90       -     -90
bc_func_insert                                        95       -     -95
bc_program_printStream                               143       -    -143
bc_program_assignStr                                 144       -    -144
bc_program_binOpPrep                                 271       -    -271
bc_lex_number                                        281       -    -281
bc_program_copyToVar                                 289       -    -289
bc_program_call                                      325       -    -325
bc_num_printNum                                      471       -    -471
bc_program_print                                     667       -    -667
bc_program_num                                       880       -    -880
------------------------------------------------------------------------------
(add/remove: 13/13 grow/shrink: 0/0 up/down: 3746/-3791)      Total: -45 bytes
   text	   data	    bss	    dec	    hex	filename
 982779	    485	   7296	 990560	  f1d60	busybox_old
 982734	    485	   7296	 990515	  f1d33	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-11 15:29:32 +01:00
Denys Vlasenko
91cde95916 bc: it's not clear bc_vm_file() always exits on errors, remove ERRORS_ARE_FATAL
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-10 20:56:44 +01:00
Denys Vlasenko
628bf1bc63 bc: more ERRORS_ARE_FATAL annotations
function                                             old     new   delta
bc_program_exec                                     3920    3969     +49
bc_program_call                                      329     325      -4
bc_vm_run                                            622     616      -6
bc_program_modexp                                    677     668      -9
bc_program_assign                                    471     455     -16
bc_program_pushArray                                 113       -    -113
------------------------------------------------------------------------------
(add/remove: 0/1 grow/shrink: 1/4 up/down: 49/-148)           Total: -99 bytes
   text	   data	    bss	    dec	    hex	filename
 982872	    485	   7296	 990653	  f1dbd	busybox_old
 982773	    485	   7296	 990554	  f1d5a	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-10 20:41:05 +01:00
Denys Vlasenko
88cfea6a81 bc: stop checking for name length in bc_lex_name()
Gigabyte-long names are not a practical concern.

function                                             old     new   delta
bc_lex_name                                           73      69      -4
bc_lex_token                                        1266    1259      -7
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/2 up/down: 0/-11)             Total: -11 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-10 20:26:04 +01:00
Denys Vlasenko
fa35e598ab bc: optimize non-interactive config: we know that many functions always succeed
function                                             old     new   delta
bc_program_assign                                    475     471      -4
bc_program_prep                                       87      81      -6
bc_parse_parse                                       423     417      -6
bc_num_p                                             440     434      -6
bc_program_printStream                               153     143     -10
bc_program_execStr                                   478     468     -10
bc_parse_auto                                        275     265     -10
bc_num_k                                             925     913     -12
bc_program_copyToVar                                 307     289     -18
bc_program_binOpPrep                                 289     271     -18
bc_num_printNum                                      489     471     -18
bc_num_m                                             287     269     -18
bc_program_pushArray                                 139     113     -26
bc_program_modexp                                    707     677     -30
bc_program_print                                     704     667     -37
bc_program_exec                                     4010    3920     -90
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/16 up/down: 0/-319)          Total: -319 bytes
   text	   data	    bss	    dec	    hex	filename
 983202	    485	   7296	 990983	  f1f07	busybox_old
 982883	    485	   7296	 990664	  f1dc8	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-10 20:17:24 +01:00
Denys Vlasenko
86e63cdeca bc: in non-interactive config, let compiler know that error funcs do not return
function                                             old     new   delta
bc_num_s                                             235     239      +4
bc_lex_next                                           92      91      -1
dc_parse_register                                     53      51      -2
dc_parse_parse                                        46      44      -2
bc_vm_run                                            624     622      -2
bc_program_assignStr                                 146     144      -2
bc_parse_else                                        135     133      -2
bc_parse_body                                        116     114      -2
bc_num_a                                             445     443      -2
bc_func_insert                                        97      95      -2
bc_program_pushVar                                   203     200      -3
bc_parse_text                                        133     130      -3
bc_error_bad_character                                17      14      -3
bc_error                                              14      11      -3
bc_program_printStream                               157     153      -4
bc_program_prep                                       91      87      -4
bc_program_copyToVar                                 311     307      -4
bc_num_ulong                                          95      90      -5
bc_num_p                                             445     440      -5
bc_program_print                                     711     704      -7
bc_parse_endBody                                     365     358      -7
bc_num_r                                             237     230      -7
bc_num_d                                             550     543      -7
dc_lex_token                                         682     674      -8
bc_program_pushArray                                 147     139      -8
bc_program_assign                                    485     475     -10
bc_program_read                                      333     322     -11
bc_lex_token                                        1278    1266     -12
bc_parse_stmt                                       1780    1767     -13
bc_program_modexp                                    723     707     -16
dc_parse_expr                                        762     744     -18
bc_program_execStr                                   496     478     -18
bc_program_call                                      347     329     -18
bc_vm_file                                           219     197     -22
bc_program_binOpPrep                                 311     289     -22
bc_parse_name                                        539     513     -26
bc_parse_parse                                       451     423     -28
bc_program_num                                       912     880     -32
bc_read_line                                         172     139     -33
bc_program_exec                                     4048    4010     -38
bc_parse_auto                                        313     275     -38
bc_parse_expr_empty_ok                              2095    2036     -59
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/41 up/down: 4/-509)          Total: -505 bytes
   text	   data	    bss	    dec	    hex	filename
 983707	    485	   7296	 991488	  f2100	busybox_old
 983202	    485	   7296	 990983	  f1f07	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-10 19:46:53 +01:00
Denys Vlasenko
dafbc2cdb8 bc: simplify bc_num_parseDecimal() further
function                                             old     new   delta
bc_program_num                                       925     912     -13

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-10 15:38:52 +01:00
Denys Vlasenko
5ba55f1f35 bc: make all function pointers FAST_FUNC, on i486 this saves ~400 bytes
function                                             old     new   delta
bc_num_rem                                            91      95      +4
bc_num_inv                                            53      56      +3
bc_num_d                                             569     572      +3
bc_num_printDigits                                   136     137      +1
bc_program_assign                                    486     485      -1
dc_lex_token                                         684     682      -2
bc_vec_pop                                            27      25      -2
bc_vec_npop                                           55      53      -2
bc_program_read                                      335     333      -2
bc_program_print                                     713     711      -2
bc_parse_parse                                       462     460      -2
bc_lex_token                                        1280    1278      -2
bc_num_printChar                                      27      24      -3
bc_num_binary                                        150     147      -3
dc_parse_parse                                        59      55      -4
bc_vm_run                                            630     626      -4
bc_num_printHex                                       71      67      -4
bc_num_divmod                                        155     150      -5
bc_vec_free                                           24      18      -6
bc_string_free                                        15       9      -6
bc_num_free                                           15       9      -6
bc_id_free                                            15       9      -6
bc_parse_free                                         53      46      -7
bc_program_scale                                       8       -      -8
bc_num_r                                             245     237      -8
bc_func_free                                          35      27      -8
bc_result_free                                        57      46     -11
bc_num_a                                             454     443     -11
bc_num_sub                                            77      65     -12
bc_num_add                                            77      65     -12
bc_program_modexp                                    736     723     -13
bc_num_s                                             252     239     -13
bc_num_mul                                            62      49     -13
bc_num_mod                                            62      49     -13
bc_num_div                                            62      49     -13
bc_num_pow                                            47      31     -16
bc_program_exec                                     4081    4059     -22
bc_num_printNum                                      514     489     -25
bc_num_p                                             478     445     -33
bc_program_len                                        34       -     -34
bc_program_num                                       963     925     -38
bc_num_k                                             988     944     -44
------------------------------------------------------------------------------
(add/remove: 0/2 grow/shrink: 4/36 up/down: 11/-416)         Total: -405 bytes
   text	   data	    bss	    dec	    hex	filename
 984536	    485	   7296	 992317	  f243d	busybox_old
 984131	    485	   7296	 991912	  f22a8	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-10 15:37:14 +01:00
Denys Vlasenko
c665c183f1 bc: 0xffffffffffffffff may be larger than unsigned long
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-10 15:15:42 +01:00
Denys Vlasenko
8b4cf0dbb0 bc: optimize bc_vec_concat()
function                                             old     new   delta
bc_vec_concat                                         71      66      -5

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-10 15:12:58 +01:00
Denys Vlasenko
a7f1a36540 bc: simplify bc_program_len()
function                                             old     new   delta
bc_program_len                                        42      34      -8

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-10 12:57:01 +01:00
Denys Vlasenko
44d79d866d bc: simplify bc_program_print()
function                                             old     new   delta
bc_program_print                                     730     713     -17

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-10 12:33:40 +01:00
Denys Vlasenko
b696d9ec20 bc: simplify bc_num_ulong2num()
function                                             old     new   delta
bc_num_ulong2num                                      64      59      -5

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-10 12:22:15 +01:00
Denys Vlasenko
9311e01803 bc: move str-to-num conversion functions to their only caller, bc_num_parse()
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-10 11:54:59 +01:00
Denys Vlasenko
218ed1cf54 bc: further simplify string-to-number conversion code
function                                             old     new   delta
bc_program_index                                      66      64      -2
bc_program_num                                       983     963     -20
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/2 up/down: 0/-22)             Total: -22 bytes
   text	   data	    bss	    dec	    hex	filename
 985706	    477	   7296	 993479	  f28c7	busybox_old
 985684	    477	   7296	 993457	  f28b1	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-09 13:33:52 +01:00
Denys Vlasenko
4a024c7719 bc: simplify string-tonumber conversion code
function                                             old     new   delta
bc_program_num                                      1108     983    -125
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/1 up/down: 0/-125)           Total: -125 bytes
   text	   data	    bss	    dec	    hex	filename
 985831	    477	   7296	 993604	  f2944	busybox_old
 985706	    477	   7296	 993479	  f28c7	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-09 13:21:54 +01:00
Denys Vlasenko
3129f705fc bc: no need to "set to zero" BcNum after bc_num_init(), it already is
function                                             old     new   delta
bc_num_init                                           48      49      +1
bc_program_num                                      1115    1108      -7
bc_program_exec                                     4098    4081     -17
bc_vm_init                                           786     768     -18
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/3 up/down: 1/-42)             Total: -41 bytes
   text	   data	    bss	    dec	    hex	filename
 985872	    477	   7296	 993645	  f296d	busybox_old
 985831	    477	   7296	 993604	  f2944	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-09 12:04:44 +01:00
Denys Vlasenko
e20e00de34 bc: add and use bc_num_init_DEF_SIZE()
function                                             old     new   delta
bc_num_init_DEF_SIZE                                   -      10     +10
bc_num_binary                                        150     148      -2
bc_program_pushVar                                   208     203      -5
bc_program_modexp                                    741     736      -5
bc_program_copyToVar                                 316     311      -5
bc_program_call                                      352     347      -5
bc_array_expand                                       88      83      -5
bc_program_num                                      1125    1115     -10
bc_vm_init                                           821     786     -35
bc_program_exec                                     4152    4098     -54
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 0/9 up/down: 10/-126)          Total: -116 bytes
   text	   data	    bss	    dec	    hex	filename
 985988	    477	   7296	 993761	  f29e1	busybox_old
 985872	    477	   7296	 993645	  f296d	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-09 11:44:20 +01:00
Denys Vlasenko
5ec4b49125 bc: in bc_program_execStr(), push two variables into inner scope
function                                             old     new   delta
bc_program_execStr                                   502     496      -6

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-09 02:54:06 +01:00
Denys Vlasenko
927a7d6853 bc: in bc_program_exec(), push two variables into inner scope
While at it, delete empty lines.

function                                             old     new   delta
bc_program_exec                                     4179    4152     -27

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-09 02:24:14 +01:00
Denys Vlasenko
8fa1e8e6e7 bc: add accessors for G.prog.strs[idx], G.prog.fns[idx]
function                                             old     new   delta
bc_program_str                                         -      17     +17
bc_program_func                                        -      17     +17
bc_program_addFunc                                   209     204      -5
bc_program_reset                                      70      64      -6
bc_program_printStream                               163     157      -6
bc_program_print                                     736     730      -6
bc_vm_file                                           226     219      -7
bc_parse_text                                        143     133     -10
bc_parse_reset                                       163     153     -10
bc_parse_endBody                                     375     365     -10
bc_parse_create                                      168     158     -10
bc_parse_addFunc                                      41      31     -10
bc_program_call                                      364     352     -12
bc_program_read                                      350     335     -15
bc_program_execStr                                   528     502     -26
bc_program_exec                                     4219    4179     -40
------------------------------------------------------------------------------
(add/remove: 2/0 grow/shrink: 0/14 up/down: 34/-173)         Total: -139 bytes
   text	   data	    bss	    dec	    hex	filename
 985043	    485	   7296	 992824	  f2638	busybox_old
 984904	    485	   7296	 992685	  f25ad	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-09 00:03:57 +01:00
Denys Vlasenko
0f37b3286a bc: eliminate always the same params to bc_num_printBase()
function                                             old     new   delta
bc_program_print                                     739     736      -3

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-08 23:48:53 +01:00
Denys Vlasenko
ebc41c9d94 bc: remove redundant error checks in bc_parse_print()
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-08 23:36:28 +01:00
Denys Vlasenko
5f1b90b91a bc: stop propagating pointer to G.prog.nchars deep into printing functions
function                                             old     new   delta
bc_num_printHex                                       62      71      +9
bc_num_printNewline                                   47      54      +7
bc_num_printDigits                                   132     136      +4
bc_num_printChar                                      23      27      +4
bc_program_printStream                               173     163     -10
bc_program_print                                     754     739     -15
bc_num_printNum                                      538     514     -24
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 4/3 up/down: 24/-49)            Total: -25 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-08 23:18:06 +01:00
Denys Vlasenko
2a8ad48734 bc: do not pass line width in parameters, it's in globals
function                                             old     new   delta
bc_num_printNewline                                   36      47     +11
bc_num_printHex                                       70      62      -8
bc_num_printDigits                                   142     132     -10
bc_program_printStream                               185     173     -12
bc_program_print                                     773     754     -19
bc_num_printNum                                      563     538     -25
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/5 up/down: 11/-74)            Total: -63 bytes
   text	   data	    bss	    dec	    hex	filename
 985122	    485	   7296	 992903	  f2687	busybox_old
 985059	    485	   7296	 992840	  f2648	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-08 21:56:37 +01:00
Denys Vlasenko
ac6ed11f8d bc: remove "ready for more input" message, GNU bc does not print that
function                                             old     new   delta
bc_read_line                                         285     268     -17
bc_vm_run                                            684     630     -54
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/2 up/down: 0/-71)             Total: -71 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-08 21:39:10 +01:00
Denys Vlasenko
6e7c65fca0 bc: trim banner, use empty interactive prompts (GNU bc compat)
function                                             old     new   delta
bc_vm_run                                            689     684      -5
bc_program_read                                      355     350      -5
bc_read_line                                         307     285     -22
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/3 up/down: 0/-32)             Total: -32 bytes
   text	   data	    bss	    dec	    hex	filename
 985409	    485	   7296	 993190	  f27a6	busybox_old
 985265	    485	   7296	 993046	  f2716	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-08 19:34:35 +01:00
Denys Vlasenko
d0bc5fdfea dc: fix "small dc" to have standard command line API
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-08 18:59:07 +01:00
Denys Vlasenko
f522dd9420 bc: replace G.eof with a special exit code of bc_vm_stdin()
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>
2018-12-07 16:35:43 +01:00
Denys Vlasenko
2d615fee38 bc: convert two macros to functions, unwing one complex max(a,min(b,c))
function                                             old     new   delta
BC_NUM_AREQ                                            -      45     +45
BC_NUM_MREQ                                            -      33     +33
bc_num_rem                                           104      91     -13
bc_num_divmod                                        168     155     -13
bc_num_d                                             584     569     -15
bc_num_mul                                            80      62     -18
bc_num_mod                                            80      62     -18
bc_num_div                                            80      62     -18
bc_num_sub                                           112      77     -35
bc_num_add                                           112      77     -35
------------------------------------------------------------------------------
(add/remove: 2/0 grow/shrink: 0/8 up/down: 78/-165)           Total: -87 bytes
   text	   data	    bss	    dec	    hex	filename
 985526	    485	   7296	 993307	  f281b	busybox_old
 985439	    485	   7296	 993220	  f27c4	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-07 16:22:45 +01:00
Denys Vlasenko
64074a1767 bc: do not perform domr limit checks when they can't work (e.g. on 32-bit arches)
Also, optimize printing of messages with fixed limit strings
by including limits as strings.

function                                             old     new   delta
bc_num_ulong                                         103      95      -8
bc_lex_number                                        296     281     -15
dc_lex_token                                         701     684     -17
bc_lex_name                                           90      73     -17
bc_num_shift                                          72      54     -18
bc_lex_token                                        1299    1280     -19
bc_parse_stmt                                       1868    1768    -100
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/7 up/down: 0/-194)           Total: -194 bytes
   text	   data	    bss	    dec	    hex	filename
 985814	    485	   7296	 993595	  f293b	busybox_old
 985526	    485	   7296	 993307	  f281b	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-07 15:50:14 +01:00
Denys Vlasenko
ffdcebdffe bc: pull temporary into a register
function                                             old     new   delta
bc_num_ulong                                         103      95      -8

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-07 15:10:05 +01:00
Denys Vlasenko
18c6b54f82 bc: use more compact parsing data structures
function                                             old     new   delta
dc_lex_token                                         697     701      +4
bc_parse_next_rel                                     20       -     -20
bc_parse_next_read                                    20       -     -20
bc_parse_next_print                                   20       -     -20
bc_parse_next_param                                   20       -     -20
bc_parse_next_for                                     20       -     -20
bc_parse_next_expr                                    20       -     -20
bc_parse_next_elem                                    20       -     -20
common_parse_expr                                     62      40     -22
bc_parse_expr                                         49      24     -25
dc_lex_regs                                           52      13     -39
bc_parse_name                                        581     539     -42
bc_parse_expr_empty_ok                              2157    2108     -49
dc_parse_insts                                       332      83    -249
dc_lex_tokens                                        364      91    -273
bc_parse_stmt                                       2261    1868    -393
------------------------------------------------------------------------------
(add/remove: 0/7 grow/shrink: 1/8 up/down: 4/-1232)         Total: -1228 bytes
   text	   data	    bss	    dec	    hex	filename
 987037	    485	   7296	 994818	  f2e02	busybox_old
 985814	    485	   7296	 993595	  f293b	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-07 12:57:32 +01:00
Denys Vlasenko
b9c321d6d9 bc: use only G_interrupt as interrupt flag
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-07 12:41:42 +01:00
Denys Vlasenko
c7a7ce06b8 bc: fix exit codes for FEATURE_CLEAN_UP=y
$ echo 0/0 | ./busybox bc; echo $?
bc: divide by zero
1
$ echo halt | ./busybox bc; echo $?
0   <------- was 1

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-06 23:06:57 +01:00
Denys Vlasenko
6d0be10aae bc: correctly parse dc options
function                                             old     new   delta
bc_vm_init                                             -     821    +821
bc_vm_file                                             -     226    +226
dc_main                                               41     187    +146
bc_main                                               41      73     +32
packed_usage                                       33076   33059     -17
bc_vm_run                                           1903     701   -1202
------------------------------------------------------------------------------
(add/remove: 2/0 grow/shrink: 2/2 up/down: 1225/-1219)          Total: 6 bytes
   text	   data	    bss	    dec	    hex	filename
 987046	    485	   7296	 994827	  f2e0b	busybox_old
 987037	    485	   7296	 994818	  f2e02	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-06 18:41:59 +01:00
Denys Vlasenko
4c9455f967 dc: fix "dc does_not_exist" SEGVing
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-06 15:21:39 +01:00
Denys Vlasenko
b23ac51d0c bc: code shrink - convert two macros to functions
function                                             old     new   delta
bc_program_printStream                                 -     185    +185
bc_program_pushArray                                   -     147    +147
bc_program_exec                                     4132    4219     +87
bc_vec_pop                                             -      27     +27
bc_vec_top                                             -      13     +13
bc_num_ulong                                          92     103     +11
bc_vm_run                                           1905    1903      -2
bc_vm_process                                         94      92      -2
bc_program_reset                                      72      70      -2
bc_program_prep                                       93      91      -2
bc_program_call                                      366     364      -2
bc_parse_startBody                                    47      45      -2
bc_parse_parse                                       464     462      -2
bc_parse_else                                        137     135      -2
bc_parse_body                                        118     116      -2
bc_program_num                                      1129    1125      -4
bc_parse_text                                        147     143      -4
bc_program_retire                                     40      35      -5
bc_program_print                                     778     773      -5
bc_program_modexp                                    746     741      -5
bc_program_pushVar                                   215     208      -7
bc_program_copyToVar                                 323     316      -7
bc_parse_operator                                    184     177      -7
bc_parse_noElse                                       65      56      -9
bc_program_binOpRetire                                56      46     -10
bc_parse_stmt                                       2271    2261     -10
bc_program_execStr                                   543     528     -15
bc_program_assignStr                                 161     146     -15
bc_parse_expr_empty_ok                              2178    2157     -21
bc_parse_endBody                                     420     375     -45
bc_program_asciify                                   464       -    -464
------------------------------------------------------------------------------
(add/remove: 4/1 grow/shrink: 2/24 up/down: 470/-651)        Total: -181 bytes
   text	   data	    bss	    dec	    hex	filename
 987227	    485	   7296	 995008	  f2ec0	busybox_old
 987046	    485	   7296	 994827	  f2e0b	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-06 13:10:56 +01:00
Denys Vlasenko
d00d2f9603 bc: make keyword POSIXness check more readable
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-06 12:59:40 +01:00
Denys Vlasenko
b6f60863cb bc: move a function to reduce forward declarations
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-06 12:54:26 +01:00
Denys Vlasenko
e55a572600 bc: small simplification in dc_lex_token()
Pulling array element into a temporary, taking address of this temporary
and copying it? That's much unnecessary work.

function                                             old     new   delta
dc_lex_token                                         701     697      -4

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-06 12:47:17 +01:00
Denys Vlasenko
2fa11b6d35 bc: add comment about BC_NUM_DEF_SIZE
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-06 12:34:39 +01:00
Denys Vlasenko
1ff8862149 bc: fix for prev commit
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-06 12:06:16 +01:00
Denys Vlasenko
4c30406df6 bc: do not needlessly use strcat
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-06 12:01:17 +01:00
Denys Vlasenko
23c2e9fcf9 bc: unbreak "BC only" and "DC only" configs
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-06 11:43:17 +01:00
Denys Vlasenko
9ca9ef2d5b dc: re-enable "tiny dc" implementation
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-06 11:31:14 +01:00
Denys Vlasenko
a6f84e1a35 bc: reuse common string
text	   data	    bss	    dec	    hex	filename
 987232	    485	   7296	 995013	  f2ec5	busybox_old
 987205	    485	   7296	 994986	  f2eaa	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-06 11:10:11 +01:00
Denys Vlasenko
95f93bdc28 bc: hook up line editing with history buffer
function                                             old     new   delta
push_input_byte                                        -      65     +65
bc_vm_run                                           1875    1905     +30
bc_read_line                                         303     305      +2
bc_num_binary                                        148     150      +2
bc_num_ulong                                         103      92     -11
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 3/1 up/down: 99/-11)             Total: 88 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-06 10:29:12 +01:00
Denys Vlasenko
ed849351d1 bc: add preparatory indent block, no code changes
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-06 10:26:13 +01:00
Denys Vlasenko
1a6a482d19 bc: if ^C handling is not selected, there is no interactive mode
function                                             old     new   delta
packed_usage                                       33023   33076     +53
bc_num_s                                             252     246      -6
bc_vm_run                                           1859    1850      -9
bc_error_fmt                                          36      20     -16
bc_posix_error_fmt                                    58      41     -17
bc_read_line                                         202     168     -34
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/5 up/down: 53/-82)            Total: -29 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-06 09:20:32 +01:00
Denys Vlasenko
54214c38db bc: fix "bc -v" printing version info twice, and not exiting
function                                             old     new   delta
bc_args                                              123     130      +7
bc_num_binary                                        150     148      -2
static.nullptr                                         4       -      -4
bc_vm_run                                           1883    1874      -9
------------------------------------------------------------------------------
(add/remove: 0/1 grow/shrink: 1/2 up/down: 7/-15)              Total: -8 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-06 09:07:06 +01:00
Denys Vlasenko
1ff1c70944 bc: make bc_vm_envArgs() NULL-terminate its argv, simplify bc_vm_envLen()
function                                             old     new   delta
bc_num_ulong                                          92     103     +11
static.nullptr                                         -       4      +4
bc_args                                              120     123      +3
static.bc_args_env_name                                4       -      -4
dc_main                                               49      41      -8
bc_main                                               49      41      -8
bc_vm_run                                           1917    1883     -34
------------------------------------------------------------------------------
(add/remove: 1/1 grow/shrink: 2/3 up/down: 18/-54)            Total: -36 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-06 00:54:12 +01:00
Denys Vlasenko
e873ff9660 bc: if FEATURE_CLEAN_UP, clean up allocations on exits
Will have exitcode 1 even on "quit" and "halt", is it a problem?

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-06 00:29:22 +01:00
Denys Vlasenko
050b0fe9a7 bc: do not allow "()" as a valid expression
function                                             old     new   delta
bc_parse_expr_empty_ok                                 -    2178   +2178
bc_parse_expr                                       2178      49   -2129
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 0/1 up/down: 2178/-2129)         Total: 49 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-05 22:40:44 +01:00
Denys Vlasenko
cca79a0064 bc: reorder functions, delete forward declarations, no code changes - part 2
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-05 21:15:46 +01:00
Denys Vlasenko
b0e3761410 bc: reorder functions, delete forward declarations, no code changes
Pure block moves of text

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-05 21:03:16 +01:00
Denys Vlasenko
aad652a69a bc: remove unused strings
text	   data	    bss	    dec	    hex	filename
 987088	    485	   7296	 994869	  f2e35	busybox_old
 987079	    485	   7296	 994860	  f2e2c	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-05 20:33:23 +01:00
Denys Vlasenko
452df923f7 bc: trivial simplification in bc_parse_return()
function                                             old     new   delta
bc_parse_stmt                                       2276    2271      -5

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-05 20:28:26 +01:00
Denys Vlasenko
657d6bb262 bc: fix "warning: 's' may be used uninitialized in this function"
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-05 20:25:03 +01:00
Denys Vlasenko
bcb62a7f11 bc: code shrink
function                                             old     new   delta
bc_parse_expr                                       2151    2178     +27
bc_parse_exprs                                        60       -     -60
------------------------------------------------------------------------------
(add/remove: 0/1 grow/shrink: 2/0 up/down: 27/-60)            Total: -33 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-05 20:17:48 +01:00
Denys Vlasenko
6543758b13 bc: code shrink
function                                             old     new   delta
bc_parse_operator                                    181     184      +3
bc_parse_ops                                          50      25     -25
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/1 up/down: 3/-25)             Total: -22 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-05 19:37:19 +01:00
Denys Vlasenko
f381a88234 bc: make division operation interruptible
function                                             old     new   delta
bc_num_d                                             564     584     +20
bc_num_r                                             230     245     +15
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 2/0 up/down: 35/0)               Total: 35 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-05 19:21:34 +01:00
Denys Vlasenko
b3cb90124b bc: use unsigned division by 10 instead of signed
function                                             old     new   delta
bc_num_k                                             990     988      -2

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-05 19:05:32 +01:00
Denys Vlasenko
06fa65bd95 bc: move ^C check fro power calculation to multiplication
function                                             old     new   delta
bc_num_k                                             971     990     +19
bc_num_p                                             507     478     -29
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/1 up/down: 19/-29)            Total: -10 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-05 19:00:58 +01:00
Denys Vlasenko
b692c2faf1 bc: bc_num_k(): move carry,i,j,len to inner scope
This might help compiler

function                                             old     new   delta
bc_num_k                                             957     971     +14

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-05 18:56:14 +01:00
Denys Vlasenko
0d7e46b1de bc: tweak error messages
function                                             old     new   delta
bc_lex_token                                        1285    1299     +14

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-05 18:31:19 +01:00
Denys Vlasenko
0064679915 bc: fix inverted POSIXness test, improve messages, commonalize message strings
function                                             old     new   delta
bc_lex_token                                        1251    1285     +34
bc_POSIX_does_not_allow_bool_ops_this_is_bad           -      25     +25
bc_POSIX_does_not_allow_empty_X_expression_in_for      -      20     +20
bc_POSIX_does_not_allow                                -      20     +20
bc_parse_expr                                       2146    2151      +5
bc_num_ulong                                         103      92     -11
------------------------------------------------------------------------------
(add/remove: 3/0 grow/shrink: 2/1 up/down: 104/-11)            Total: 93 bytes
   text	   data	    bss	    dec	    hex	filename
 987210	    485	   7296	 994991	  f2eaf	busybox_old
 987084	    485	   7296	 994865	  f2e31	busybox_unstripped
^^^^^^^

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-05 18:12:27 +01:00
Denys Vlasenko
5318f81fbe bc: print error line numbers
FILE:
	print 1
	print "

$ busybox bc -q FILE
bc: FILE:2: string end could not be found
ready for more input
>>> _

function                                             old     new   delta
bc_verror_msg                                          -      99     +99
bc_lex_file                                           12      28     +16
bc_lex_next                                           77      92     +15
dc_lex_token                                         687     701     +14
bc_lex_token                                        1237    1251     +14
bc_posix_error_fmt                                    90      58     -32
bc_error_fmt                                          70      36     -34
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 4/2 up/down: 158/-66)            Total: 92 bytes
   text	   data	    bss	    dec	    hex	filename
 987108	    485	   7296	 994889	  f2e49	busybox_old
 987210	    485	   7296	 994991	  f2eaf	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-05 17:48:01 +01:00
Denys Vlasenko
08c033c406 bc: optimize pushing zero bytes to vectors
function                                             old     new   delta
bc_vec_pushZeroByte                                    -      10     +10
bc_vm_run                                           1919    1917      -2
bc_vec_string                                         61      59      -2
bc_vec_concat                                         68      66      -2
bc_parse_create                                      170     168      -2
bc_lex_number                                        298     296      -2
dc_lex_token                                         691     687      -4
bc_read_line                                         314     303     -11
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 0/7 up/down: 10/-25)            Total: -15 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-05 16:55:08 +01:00
Denys Vlasenko
0409ad36a1 bc: restore printing of script name on errors
Examples:

On stdin, no file name is available:
	$ echo 'print "' | busybox bc
	bc: string end could not be found

When the same error is in file:
	$ busybox bc FILE
	bc 1.30.0.git
	Copyright (c) 2018 Gavin D. Howard and contributors
	Report bugs at: https://github.com/gavinhoward/bc
	This is free software with ABSOLUTELY NO WARRANTY
	FILE: string end could not be found
	ready for more input
	>>>

Line number printing to be added later...

function                                             old     new   delta
bc_error_fmt                                          38      70     +32
bc_posix_error_fmt                                    60      90     +30
bc_vm_run                                           1900    1919     +19
bc_program_read                                      338     355     +17
bc_lex_file                                           15      12      -3
bc_program_stdin_name                                  8       -      -8
------------------------------------------------------------------------------
(add/remove: 0/1 grow/shrink: 4/1 up/down: 98/-11)             Total: 87 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-05 16:39:22 +01:00
Denys Vlasenko
0ad36c46c7 bc: do not check for errors when parsing/running internal library
function                                             old     new   delta
bc_lib_name                                            4       -      -4
bc_vm_run                                           1921    1900     -21
------------------------------------------------------------------------------
(add/remove: 0/1 grow/shrink: 0/1 up/down: 0/-25)             Total: -25 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-05 16:21:43 +01:00
Denys Vlasenko
24fb2cd62f bc: shrink error handling code by enabling tail-call optimization
function                                             old     new   delta
bc_posix_error_fmt                                     -      60     +60
bc_error_fmt                                           -      38     +38
bc_error_bad_character                                 -      17     +17
bc_parse_auto                                        302     313     +11
bc_num_ulong                                          93     103     +10
bc_error_variable_is_wrong_type                        -      10     +10
bc_error_stack_has_too_few_elements                    -      10     +10
bc_error_nested_read_call                              -      10     +10
bc_error_bad_token                                     -      10     +10
bc_error_bad_expression                                -      10     +10
bc_num_d                                             561     564      +3
bc_program_assign                                    484     486      +2
dc_parse_parse                                        60      59      -1
bc_program_num                                      1130    1129      -1
bc_program_call                                      367     366      -1
bc_parse_stmt                                       2277    2276      -1
bc_lex_number                                        299     298      -1
bc_lex_name                                           91      90      -1
bc_func_insert                                        98      97      -1
bc_num_shift                                          74      72      -2
bc_vm_run                                           1924    1921      -3
bc_parse_endBody                                     424     420      -4
bc_lex_next                                           81      77      -4
bc_program_read                                      343     338      -5
bc_program_asciify                                   469     464      -5
bc_program_pushVar                                   221     215      -6
bc_program_print                                     784     778      -6
bc_program_prep                                       99      93      -6
bc_program_assignStr                                 167     161      -6
bc_parse_else                                        143     137      -6
bc_parse_body                                        124     118      -6
dc_parse_register                                     61      53      -8
dc_lex_token                                         699     691      -8
bc_program_modexp                                    756     746     -10
bc_parse_name                                        593     581     -12
dc_parse_expr                                        775     762     -13
bc_program_copyToVar                                 336     323     -13
bc_program_binOpPrep                                 324     311     -13
bc_program_execStr                                   561     543     -18
bc_program_exec                                     4150    4132     -18
bc_parse_parse                                       483     464     -19
bc_error                                              38      14     -24
bc_lex_token                                        1266    1237     -29
bc_posix_error                                        60      14     -46
bc_parse_expr                                       2194    2146     -48
------------------------------------------------------------------------------
(add/remove: 8/0 grow/shrink: 4/33 up/down: 191/-345)        Total: -154 bytes
   text	   data	    bss	    dec	    hex	filename
 987226	    485	   7296	 995007	  f2ebf	busybox_old
 987072	    485	   7296	 994853	  f2e25	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-05 16:03:46 +01:00
Denys Vlasenko
f359e004b0 bc: make 2^1000000 interruptible faster
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-05 15:43:35 +01:00
Denys Vlasenko
68cc0a676e bc: remove tabs from internal library
function                                             old     new   delta
bc_lib                                              1877    1674    -203

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-05 15:43:35 +01:00
Denys Vlasenko
51fb8aa5c1 bc: store library in ASCII, shrink keyword parsing code
Also, use ARRAY_SIZE() where appropriate

function                                             old     new   delta
bc_lib                                              1878    1877      -1
bc_program_index                                      66      64      -2
bc_lex_token                                        1282    1266     -16
bc_lex_kws                                           220     160     -60
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/4 up/down: 0/-79)             Total: -79 bytes
   text	   data	    bss	    dec	    hex	filename
 987518	    485	   7296	 995299	  f2fe3	busybox_old
 987440	    485	   7296	 995221	  f2f95	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-05 15:43:35 +01:00
Denys Vlasenko
cb9a99f3bb bc: drop bc_map_init() macro
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-05 15:43:35 +01:00
Denys Vlasenko
7d62801db9 bc: create a few common functions
function                                             old     new   delta
bc_char_vec_init                                       -      12     +12
bc_vec_pop_all                                         -       8      +8
bc_program_index                                      64      66      +2
bc_vec_string                                         64      61      -3
bc_vec_free                                           27      24      -3
bc_read_line                                         317     314      -3
bc_program_execStr                                   564     561      -3
bc_program_exec                                     4153    4150      -3
bc_program_copyToVar                                 340     336      -4
bc_parse_create                                      175     170      -5
dc_lex_token                                         705     699      -6
bc_program_reset                                      78      72      -6
bc_lex_number                                        305     299      -6
bc_program_read                                      353     343     -10
bc_program_addFunc                                   225     209     -16
bc_vm_run                                           1942    1924     -18
bc_parse_reset                                       181     163     -18
------------------------------------------------------------------------------
(add/remove: 2/0 grow/shrink: 1/14 up/down: 22/-104)          Total: -82 bytes
   text	   data	    bss	    dec	    hex	filename
 987600	    485	   7296	 995381	  f3035	busybox_old
 987518	    485	   7296	 995299	  f2fe3	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-05 15:43:35 +01:00
Denys Vlasenko
d5f7703abb bc: rewrite "BOOL * EXPR" idiom as if() statement
function                                             old     new   delta
bc_program_index                                      66      64      -2
bc_program_num                                      1147    1130     -17
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/2 up/down: 0/-19)             Total: -19 bytes
   text	   data	    bss	    dec	    hex	filename
 987619	    485	   7296	 995400	  f3048	busybox_old
 987600	    485	   7296	 995381	  f3035	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-05 15:43:35 +01:00
Denys Vlasenko
17c5472c5a bc: switch to SA_RESTART signal handling
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-05 15:43:35 +01:00
Denys Vlasenko
d70d4a0235 bc: get rid of G.tty and G.flags
G.flags == option_mask32

function                                             old     new   delta
bc_args                                               97     120     +23
dc_main                                               48      49      +1
bc_main                                               48      49      +1
bc_error                                              42      38      -4
bc_posix_error                                        65      60      -5
bc_read_line                                         325     317      -8
dc_lex_token                                         714     705      -9
bc_vm_run                                           2039    1942     -97
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 3/5 up/down: 25/-123)           Total: -98 bytes
   text	   data	    bss	    dec	    hex	filename
 987717	    485	   7296	 995498	  f30aa	busybox_old
 987619	    485	   7296	 995400	  f3048	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-05 15:43:35 +01:00
Denys Vlasenko
9b70f197b4 bc: convert all status codes, remove bc_err_msgs[], bc_vm_error(), bc_vm_posixError()
function                                             old     new   delta
bc_posix_error                                         -      65     +65
bc_vm_run                                           1995    2039     +44
bc_err_line                                            7       -      -7
bc_num_ulong                                         103      93     -10
bc_parse_parse                                       495     483     -12
bc_err_fmt                                            12       -     -12
bc_warn_fmt                                           14       -     -14
bc_parse_expr                                       2210    2194     -16
bc_program_reset                                     105      78     -27
bc_vm_process                                        130      94     -36
bc_parse_stmt                                       2313    2277     -36
bc_err_msgs                                           60       -     -60
bc_lex_token                                        1367    1282     -85
bc_vm_error                                          143       -    -143
bc_vm_posixError                                     189       -    -189
------------------------------------------------------------------------------
(add/remove: 1/6 grow/shrink: 1/7 up/down: 109/-647)         Total: -538 bytes
   text	   data	    bss	    dec	    hex	filename
 988258	    485	   7296	 996039	  f32c7	busybox_old
 987717	    485	   7296	 995498	  f30aa	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-05 15:43:35 +01:00
Denys Vlasenko
60cf747b6c bc: convert all non-POSIX BC_STATUS_foo codes
function                                             old     new   delta
bc_program_asciify                                     -     469    +469
bc_parse_parse                                       432     495     +63
dc_parse_expr                                        727     775     +48
bc_vm_run                                           1955    1995     +40
bc_program_num                                      1115    1147     +32
bc_program_binOpPrep                                 296     324     +28
static.msg                                             -      24     +24
bc_parse_name                                        570     593     +23
bc_lex_token                                        1344    1367     +23
dc_lex_token                                         695     714     +19
bc_num_ulong                                          85     103     +18
bc_program_read                                      336     353     +17
dc_parse_parse                                        47      60     +13
bc_parse_stmt                                       2301    2313     +12
bc_parse_auto                                        291     302     +11
bc_program_prep                                       89      99     +10
bc_lex_next                                           71      81     +10
dc_parse_register                                     52      61      +9
bc_program_print                                     775     784      +9
bc_func_insert                                        89      98      +9
bc_program_assignStr                                 159     167      +8
bc_program_assign                                    476     484      +8
bc_parse_body                                        116     124      +8
bc_lex_name                                           83      91      +8
bc_program_pushVar                                   215     221      +6
bc_parse_text                                        141     147      +6
bc_num_shift                                          68      74      +6
bc_num_p                                             472     478      +6
bc_program_execStr                                   559     564      +5
bc_parse_else                                        139     143      +4
bc_lex_number                                        301     305      +4
bc_num_d                                             558     561      +3
bc_parse_endBody                                     422     424      +2
bc_num_r                                             231     230      -1
bc_program_copyToVar                                 343     340      -3
bc_program_call                                      372     367      -5
bc_parse_expr                                       2215    2210      -5
bc_program_modexp                                    763     756      -7
bc_err_msgs                                          164      60    -104
bc_program_pushArray                                 136       -    -136
bc_program_exec                                     4453    4153    -300
------------------------------------------------------------------------------
(add/remove: 2/1 grow/shrink: 31/7 up/down: 961/-561)         Total: 400 bytes
   text	   data	    bss	    dec	    hex	filename
 987766	    485	   7296	 995547	  f30db	busybox_old
 988258	    485	   7296	 996039	  f32c7	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-05 15:43:35 +01:00
Denys Vlasenko
d38af48e0a bc: convert BC_STATUS_EXEC_SIGNAL - its message string was never used
function                                             old     new   delta
bc_vm_process                                        132     130      -2
bc_err_msgs                                          168     164      -4
dc_parse_parse                                        52      47      -5
bc_parse_reset                                       187     181      -6
bc_program_ready_msg                                  22       -     -22
bc_program_exec                                     4478    4453     -25
bc_parse_parse                                       461     432     -29
bc_program_reset                                     159     105     -54
------------------------------------------------------------------------------
(add/remove: 0/1 grow/shrink: 0/7 up/down: 0/-147)           Total: -147 bytes
   text	   data	    bss	    dec	    hex	filename
 987923	    485	   7296	 995704	  f3178	busybox_old
 987766	    485	   7296	 995547	  f30db	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-05 15:43:35 +01:00
Denys Vlasenko
abbc433d29 bc: convert BC_STATUS_PARSE_NO_AUTO
function                                             old     new   delta
bc_parse_auto                                        275     291     +16
bc_err_msgs                                          172     168      -4
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/1 up/down: 16/-4)              Total: 12 bytes
   text	   data	    bss	    dec	    hex	filename
 987911	    485	   7296	 995692	  f316c	busybox_old
 987923	    485	   7296	 995704	  f3178	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-05 15:43:35 +01:00
Denys Vlasenko
04a1c763a6 bc: convert BC_STATUS_EXEC_MISMATCHED_PARAMS and BC_STATUS_EXEC_UNDEFINED_FUNC
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-05 15:43:35 +01:00
Denys Vlasenko
a02f84472a bc: BC_STATUS_VEC_ITEM_EXISTS is not a real error code, its message was never used
It was only used to indicate rusult of bc_map_insert() - did we insert, or
did we find that this key is already in the map?

function                                             old     new   delta
bc_map_insert                                        142     145      +3
bc_program_addFunc                                   226     225      -1
bc_err_msgs                                          184     180      -4
bc_program_search                                    152     143      -9
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/3 up/down: 3/-14)             Total: -11 bytes
   text	   data	    bss	    dec	    hex	filename
 987904	    485	   7296	 995685	  f3165	busybox_old
 987873	    485	   7296	 995654	  f3146	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-05 15:43:35 +01:00
Denys Vlasenko
bc5ce66617 bc: simplify bc_lex_comment()
function                                             old     new   delta
bc_lex_token                                        1369    1344     -25

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-05 15:43:35 +01:00
Denys Vlasenko
c1c2470f84 bc: handle BIN_FILE and LEX_BAD_CHAR errors at the site of detection
The most informative message can be generated at the location
where error is detected. The "error codes" are stupid:
print error meesage immediately, then just return "there was an error"
indicator.

All error codes will be converted. For now, converting these two.

For now, this and following changes will degrade error messages
quality. For example, file name and line number printouts may be lost.
This will be re-added later.

This change anlso fixes handling of invalid stdin input:
this used to cause interactive bc to exit:

....
>>> ς
bc: illegal character 0xcf
bc: illegal character 0x82
>>> _

function                                             old     new   delta
bc_error                                               -      42     +42
bc_lex_token                                        1333    1369     +36
dc_lex_token                                         675     695     +20
bc_read_line                                         311     325     +14
bc_num_a                                             456     454      -2
bc_err_msgs                                          188     184      -4
bc_num_ulong                                          95      85     -10
bc_vm_run                                           1984    1955     -29
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 3/4 up/down: 112/-45)            Total: 67 bytes
   text	   data	    bss	    dec	    hex	filename
 987828	    485	   7296	 995609	  f3119	busybox_old
 987929	    485	   7296	 995710	  f317e	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-05 15:43:35 +01:00
Denys Vlasenko
d4744adf35 bc: eliminate BC_STATUS_INPUT_EOF
function                                             old     new   delta
fflush_and_check                                       -      36     +36
bc_num_a                                             445     456     +11
bc_num_ulong                                          85      95     +10
bc_vm_run                                           1978    1984      +6
bc_num_s                                             246     252      +6
bc_err_msgs                                          192     188      -4
quit                                                  38      32      -6
bc_vm_process                                        139     132      -7
bc_program_reset                                     172     159     -13
bc_parse_create                                      192     175     -17
bc_read_line                                         349     311     -38
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 4/6 up/down: 69/-85)            Total: -16 bytes
   text	   data	    bss	    dec	    hex	filename
 987844	    485	   7296	 995625	  f3129	busybox_old
 987828	    485	   7296	 995609	  f3119	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-05 15:43:35 +01:00
Denys Vlasenko
cfdc1334c3 bc: handle "limits" and "quit" immediately at parse time
No need to propagate a special exit code.

function                                             old     new   delta
bc_parse_stmt                                       2197    2301    +104
quit                                                   -      38     +38
bc_read_line                                         344     349      +5
bc_program_reset                                     174     172      -2
bc_num_s                                             252     246      -6
bc_num_a                                             454     445      -9
bc_parse_parse                                       471     461     -10
bc_num_ulong                                          95      85     -10
bc_program_exec                                     4500    4478     -22
bc_vm_run                                           2006    1978     -28
bc_vm_process                                        291     139    -152
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 2/8 up/down: 147/-239)          Total: -92 bytes
   text	   data	    bss	    dec	    hex	filename
 987936	    485	   7296	 995717	  f3185	busybox_old
 987844	    485	   7296	 995625	  f3129	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-05 15:43:35 +01:00
Denys Vlasenko
01cabafd05 bc": drop unused error codes and strings
function                                             old     new   delta
bc_err_msgs                                          216     192     -24
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/1 up/down: 0/-24)             Total: -24 bytes
   text	   data	    bss	    dec	    hex	filename
 988122	    485	   7296	 995903	  f323f	busybox_old
 987936	    485	   7296	 995717	  f3185	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-05 15:43:35 +01:00
Denys Vlasenko
b8860a8892 bc: remove "error ids": serve no useful purpose, error message should be explanatory enough
function                                             old     new   delta
bc_warn_fmt                                           17      14      -3
bc_err_fmt                                            15      12      -3
bc_vm_posixError                                     205     189     -16
bc_vm_error                                          156     138     -18
bc_errs                                               28       -     -28
bc_err_ids                                            58       -     -58
------------------------------------------------------------------------------
(add/remove: 0/2 grow/shrink: 0/4 up/down: 0/-126)           Total: -126 bytes
   text	   data	    bss	    dec	    hex	filename
 988288	    485	   7296	 996069	  f32e5	busybox_old
 988122	    485	   7296	 995903	  f323f	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-05 15:43:35 +01:00
Denys Vlasenko
1f67e935ac bc: reduce forward declarations
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-05 15:43:35 +01:00
Denys Vlasenko
d9d66556d7 bc: use smaller datatypes for limits, match GNU bc 'limits' output
function                                             old     new   delta
bc_vm_process                                        315     291     -24
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/1 up/down: 0/-24)             Total: -24 bytes
   text	   data	    bss	    dec	    hex	filename
 988303	    485	   7296	 996084	  f32f4	busybox_old
 988273	    485	   7296	 996054	  f32d6	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-05 15:43:35 +01:00
Denys Vlasenko
416ce76bcd bc: better handle optional args of bc_program_pushVar()
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-05 15:43:35 +01:00
Denys Vlasenko
9721f6c8b0 bc: tweak help text
-v is supported but not shown

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-05 15:43:35 +01:00
Denys Vlasenko
a0c421c118 bc: simplify bc_vm_stdin()
function                                             old     new   delta
bc_vm_run                                           2020    2006     -14

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-05 15:43:35 +01:00
Denys Vlasenko
71e1fc6b37 bc: only check for ^C in bc_program_exec() main loop
Checking it in individual operations such as SQRT is not necessary
since they usually do not take very long to complete. We repeatedly return
to main loop.

TODO: re-add more fine-grained ^C checks - but only with examples where it is
actually needed. E.g. I suspect simplest ops like addition or compare won't need it.

function                                             old     new   delta
bc_program_index                                      66      64      -2
bc_num_s                                             258     246     -12
bc_num_cmp                                           294     275     -19
bc_num_compare                                        84      59     -25
bc_num_subArrays                                      74      47     -27
bc_num_a                                             474     445     -29
bc_program_exec                                     4530    4500     -30
bc_num_p                                             518     472     -46
bc_num_d                                             604     558     -46
bc_num_k                                            1005     957     -48
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/10 up/down: 0/-284)          Total: -284 bytes
   text	   data	    bss	    dec	    hex	filename
 988601	    485	   7296	 996382	  f341e	busybox_old
 988317	    485	   7296	 996098	  f3302	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-05 15:43:35 +01:00
Denys Vlasenko
df51539ed0 bc: simpler calling convention for bc_read_file(), bc_program_search()
function                                             old     new   delta
bc_vm_run                                           1854    2020    +166
bc_program_assign                                    482     476      -6
bc_program_pushVar                                   225     215     -10
bc_program_call                                      366     356     -10
bc_program_num                                      1126    1115     -11
bc_program_copyToVar                                 354     343     -11
bc_program_search                                    164     152     -12
bc_program_execStr                                   573     559     -14
bc_program_exec                                     4544    4530     -14
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/8 up/down: 166/-88)            Total: 78 bytes
   text	   data	    bss	    dec	    hex	filename
 988523	    485	   7296	 996304	  f33d0	busybox_old
 988601	    485	   7296	 996382	  f341e	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-05 15:43:35 +01:00
Denys Vlasenko
e3b4f23cf3 bc: bc_num_ulong2num(), bc_program_pushGlobal(), bc_program_stackLen() never fail
function                                             old     new   delta
bc_num_ulong2num                                      66      62      -4
bc_num_printNum                                      572     563      -9
bc_program_exec                                     4562    4544     -18
bc_program_num                                      1147    1126     -21
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/4 up/down: 0/-52)             Total: -52 bytes
   text	   data	    bss	    dec	    hex	filename
 988575	    485	   7296	 996356	  f3404	busybox_old
 988523	    485	   7296	 996304	  f33d0	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-05 15:43:35 +01:00
Denys Vlasenko
a1d3ca2455 bc: stop passing around pointers to G.prog, they are all constant
function                                             old     new   delta
bc_program_exec                                     4523    4562     +39
bc_program_assign                                    450     482     +32
bc_program_assignStr                                 131     159     +28
bc_program_print                                     762     775     +13
bc_program_num                                      1134    1147     +13
bc_program_search                                    154     164     +10
bc_num_ulong                                          85      95     +10
dc_parse_expr                                        719     727      +8
bc_program_retire                                     34      40      +6
bc_program_reset                                     168     174      +6
bc_program_binOpRetire                                50      56      +6
bc_program_addFunc                                   220     226      +6
bc_program_prep                                       88      89      +1
dc_parse_init                                         18      17      -1
bc_program_copyToVar                                 355     354      -1
bc_parse_text                                        142     141      -1
bc_parse_number                                       88      87      -1
bc_parse_init                                         18      17      -1
bc_parse_endBody                                     423     422      -1
common_parse_init                                     29      26      -3
bc_parse_string                                      103     100      -3
bc_parse_addFunc                                      44      41      -3
bc_program_call                                      371     366      -5
bc_program_binOpPrep                                 301     296      -5
bc_program_read                                      342     336      -6
bc_parse_create                                      198     192      -6
bc_program_pushArray                                 143     136      -7
bc_parse_reset                                       194     187      -7
bc_vm_process                                        323     315      -8
bc_program_pushVar                                   236     225     -11
bc_vm_run                                           1872    1854     -18
bc_parse_name                                        590     570     -20
bc_program_execStr                                   594     573     -21
bc_program_modexp                                    793     763     -30
bc_program_printStream                               172       -    -172
------------------------------------------------------------------------------
(add/remove: 0/1 grow/shrink: 13/21 up/down: 178/-331)       Total: -153 bytes
   text	   data	    bss	    dec	    hex	filename
 988728	    485	   7296	 996509	  f349d	busybox_old
 988575	    485	   7296	 996356	  f3404	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-05 15:43:35 +01:00
Denys Vlasenko
f6c1da5ff3 bc: select parse_init() and parse_expr() using IS_BC, not function pointers
function                                             old     new   delta
common_parse_expr                                      -      62     +62
common_parse_init                                      -      29     +29
dc_parse_parse                                        53      52      -1
dc_parse_expr                                        723     719      -4
bc_program_execStr                                   606     594     -12
dc_parse_init                                         33      18     -15
bc_parse_init                                         33      18     -15
bc_parse_expression                                   39       -     -39
bc_vm_run                                           1923    1872     -51
------------------------------------------------------------------------------
(add/remove: 2/1 grow/shrink: 0/6 up/down: 91/-137)           Total: -46 bytes
   text	   data	    bss	    dec	    hex	filename
 988774	    485	   7296	 996555	  f34cb	busybox_old
 988728	    485	   7296	 996509	  f349d	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-05 15:43:35 +01:00
Denys Vlasenko
785e4b3057 bc: propagate fixed arguments into callees
Looks like there is only one "BcProgram" object, &G.prog.

function                                             old     new   delta
bc_program_exec                                     4401    4523    +122
bc_program_execStr                                   579     606     +27
bc_program_read                                      323     342     +19
bc_args                                               83      97     +14
bc_vm_process                                        327     323      -4
bc_num_ulong                                          95      85     -10
dc_main                                               62      48     -14
bc_main                                               62      48     -14
bc_vm_run                                           2317    1923    -394
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 4/5 up/down: 182/-436)         Total: -254 bytes
   text	   data	    bss	    dec	    hex	filename
 989028	    485	   7296	 996809	  f35c9	busybox_old
 988774	    485	   7296	 996555	  f34cb	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-05 15:43:35 +01:00
Denys Vlasenko
ab3c568fd8 bc: simplify ^C handling
It's still buggy: if SIGINT would interrupt e.g. output write(),
the result would not be as intended:

>>> while ( 1 ) print 1
...
11111111111111111111111111111111111111111111111111111111111111111111\
11111111111111111111111111111111111111111111111111111111111111111111\
^Cready for more input

interrupt (type "quit" to exit)
>>> bc: output error

function                                             old     new   delta
dc_parse_parse                                        58      53      -5
bc_parse_parse                                       476     471      -5
bc_num_d                                             609     604      -5
bc_num_cmp                                           299     294      -5
bc_num_compare                                        90      84      -6
bc_parse_expr                                       2222    2215      -7
bc_num_subArrays                                      82      74      -8
dc_main                                               72      62     -10
bc_main                                               72      62     -10
bc_program_exec                                     4413    4401     -12
bc_num_a                                             491     474     -17
bc_read_line                                         364     344     -20
bc_num_p                                             540     518     -22
bc_program_reset                                     192     168     -24
bc_num_k                                            1031    1005     -26
bc_vm_run                                           2382    2317     -65
bc_vm_sig                                             97       -     -97
------------------------------------------------------------------------------
(add/remove: 0/1 grow/shrink: 0/16 up/down: 0/-344)          Total: -344 bytes
   text	   data	    bss	    dec	    hex	filename
 989372	    485	   7296	 997153	  f3721	busybox_old
 989028	    485	   7296	 996809	  f35c9	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-05 15:43:35 +01:00
Denys Vlasenko
6d9146ab56 bc: convert to "G trick" - this returns bc to zero bss increase
function                                             old     new   delta
bc_num_p                                             518     540     +22
bc_num_k                                            1010    1031     +21
bc_vm_process                                        312     327     +15
bc_program_exec                                     4401    4413     +12
bc_vm_posixError                                     194     205     +11
bc_num_a                                             480     491     +11
bc_program_reset                                     182     192     +10
bc_vm_sig                                             88      97      +9
bc_vm_error                                          148     156      +8
bc_parse_expr                                       2215    2222      +7
bc_num_compare                                        84      90      +6
dc_parse_parse                                        53      58      +5
dc_lex_token                                         670     675      +5
bc_read_line                                         359     364      +5
bc_parse_parse                                       471     476      +5
bc_num_cmp                                           294     299      +5
bc_num_subArrays                                      84      82      -2
bc_num_d                                             614     609      -5
dc_main                                               80      72      -8
bc_main                                               80      72      -8
bcg                                                   40       -     -40
bc_vm_run                                           2569    2382    -187
------------------------------------------------------------------------------
(add/remove: 0/1 grow/shrink: 16/5 up/down: 157/-250)         Total: -93 bytes
   text	   data	    bss	    dec	    hex	filename
 989425	    485	   7336	 997246	  f377e	busybox_old
 989372	    485	   7296	 997153	  f3721	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-05 15:43:35 +01:00
Denys Vlasenko
5a9fef5b59 bc: simplify, and restore ^C, fix ^D handling
^D used to enter infinite loop

function                                             old     new   delta
bc_read_line                                         342     359     +17
bc_args_opt                                            8       -      -8
dc_sig_msg                                            31       -     -31
bc_sig_msg                                            34       -     -34
bc_vm_run                                           2608    2569     -39
bc_args                                              123      83     -40
bc_args_lopt                                          81       -     -81
------------------------------------------------------------------------------
(add/remove: 0/4 grow/shrink: 1/2 up/down: 17/-233)          Total: -216 bytes
   text	   data	    bss	    dec	    hex	filename
 989491	    485	   7336	 997312	  f37c0	busybox_old
 989425	    485	   7336	 997246	  f377e	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-05 15:43:35 +01:00
Denys Vlasenko
00d7779a35 bc: simplify, stop testing for IO errors on every output
function                                             old     new   delta
bc_read_line                                         297     342     +45
bc_vm_run                                           2601    2608      +7
bc_program_reset                                     178     182      +4
bc_args                                              125     123      -2
dc_name                                                3       -      -3
bc_name                                                3       -      -3
bc_program_printStream                               176     172      -4
bcg                                                   48      40      -8
dc_main                                               97      80     -17
bc_main                                               97      80     -17
bc_vm_fflush                                          21       -     -21
bc_vm_puts                                            23       -     -23
bc_vm_printf                                          36       -     -36
bc_vm_putchar                                         46       -     -46
bc_vm_exit                                            46       -     -46
bc_vm_process                                        361     312     -49
bc_vm_info                                            76      19     -57
bc_copyright                                         155       -    -155
------------------------------------------------------------------------------
(add/remove: 0/8 grow/shrink: 3/7 up/down: 56/-487)          Total: -431 bytes
   text	   data	    bss	    dec	    hex	filename
 989722	    485	   7344	 997551	  f38af	busybox_old
 989491	    485	   7336	 997312	  f37c0	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-05 15:42:52 +01:00
Denys Vlasenko
ef869ec728 bc: fix warnings, initial cleanups
function                                             old     new   delta
bc_program_exec                                        -    4401   +4401
bc_vm_run                                              -    2601   +2601
bc_parse_expr                                          -    2215   +2215
bc_parse_stmt                                          -    2197   +2197
bc_lib                                                 -    1878   +1878
bc_lex_token                                           -    1333   +1333
bc_program_num                                         -    1134   +1134
bc_num_k                                               -    1010   +1010
bc_program_modexp                                      -     793    +793
bc_program_print                                       -     762    +762
dc_parse_expr                                          -     723    +723
dc_lex_token                                           -     670    +670
bc_num_d                                               -     614    +614
bc_parse_name                                          -     590    +590
bc_program_execStr                                     -     579    +579
bc_num_printNum                                        -     572    +572
bc_num_p                                               -     518    +518
bc_num_a                                               -     480    +480
bc_parse_parse                                         -     471    +471
bc_program_assign                                      -     450    +450
bc_parse_endBody                                       -     423    +423
bc_program_call                                        -     371    +371
dc_lex_tokens                                          -     364    +364
bc_vm_process                                          -     361    +361
bc_program_copyToVar                                   -     355    +355
dc_parse_insts                                         -     332    +332
bc_program_read                                        -     323    +323
bc_program_binOpPrep                                   -     301    +301
bc_lex_number                                          -     301    +301
bc_read_line                                           -     297    +297
bc_num_cmp                                             -     294    +294
bc_num_m                                               -     287    +287
bc_parse_auto                                          -     275    +275
bc_num_s                                               -     258    +258
bc_program_pushVar                                     -     236    +236
bc_num_r                                               -     231    +231
bc_program_addFunc                                     -     220    +220
bc_lex_kws                                             -     220    +220
bc_err_msgs                                            -     216    +216
bc_parse_create                                        -     198    +198
bc_vm_posixError                                       -     194    +194
bc_parse_reset                                         -     194    +194
bc_parse_operator                                      -     181    +181
bc_program_reset                                       -     178    +178
bc_program_printStream                                 -     176    +176
bc_num_divmod                                          -     168    +168
bc_copyright                                           -     155    +155
bc_program_search                                      -     154    +154
bc_num_binary                                          -     150    +150
bc_vm_error                                            -     148    +148
bc_program_pushArray                                   -     143    +143
bc_parse_text                                          -     142    +142
bc_num_printDigits                                     -     142    +142
bc_map_insert                                          -     142    +142
bc_parse_else                                          -     139    +139
bc_program_assignStr                                   -     131    +131
bc_args                                                -     125    +125
dc_parse_mem                                           -     116    +116
bc_parse_body                                          -     116    +116
bc_num_split                                           -     113    +113
bc_num_sub                                             -     112    +112
bc_num_add                                             -     112    +112
packed_usage                                       32958   33066    +108
bc_num_rem                                             -     104    +104
bc_parse_string                                        -     103    +103
bc_main                                                -      97     +97
bc_num_ulong                                           -      95     +95
bc_func_insert                                         -      89     +89
bc_vm_sig                                              -      88     +88
bc_program_prep                                        -      88     +88
bc_parse_number                                        -      88     +88
bc_array_expand                                        -      88     +88
bc_num_subArrays                                       -      84     +84
bc_num_compare                                         -      84     +84
bc_lex_name                                            -      83     +83
bc_args_lopt                                           -      81     +81
bc_parse_pushIndex                                     -      80     +80
bc_num_mul                                             -      80     +80
bc_num_mod                                             -      80     +80
bc_num_div                                             -      80     +80
bc_vm_info                                             -      76     +76
bc_program_name                                        -      75     +75
bc_map_find                                            -      71     +71
bc_lex_next                                            -      71     +71
bc_num_printHex                                        -      70     +70
bc_vec_concat                                          -      68     +68
bc_num_shift                                           -      68     +68
bc_num_extend                                          -      68     +68
bc_program_index                                       -      66     +66
bc_num_ulong2num                                       -      66     +66
bc_num_retireMul                                       -      66     +66
bc_parse_noElse                                        -      65     +65
bc_vec_string                                          -      64     +64
bc_parse_pushName                                      -      63     +63
bc_parse_exprs                                         -      60     +60
bc_err_ids                                             -      58     +58
bc_result_free                                         -      57     +57
bc_vec_npop                                            -      55     +55
dc_parse_parse                                         -      53     +53
bc_vec_push                                            -      53     +53
bc_parse_free                                          -      53     +53
bc_num_inv                                             -      53     +53
dc_parse_register                                      -      52     +52
dc_lex_regs                                            -      52     +52
bc_lex_whitespace                                      -      52     +52
bc_num_copy                                            -      51     +51
bc_program_binOpRetire                                 -      50     +50
bc_parse_ops                                           -      50     +50
bc_map_index                                           -      50     +50
bcg                                                    -      48     +48
bc_num_init                                            -      48     +48
bc_parse_startBody                                     -      47     +47
bc_num_pow                                             -      47     +47
bc_vm_putchar                                          -      46     +46
bc_vm_exit                                             -      46     +46
bc_num_clean                                           -      45     +45
bc_parse_addFunc                                       -      44     +44
bc_vec_grow                                            -      42     +42
bc_program_len                                         -      42     +42
bc_num_truncate                                        -      42     +42
bc_array_init                                          -      42     +42
bc_parse_expression                                    -      39     +39
bc_lex_lineComment                                     -      39     +39
bc_num_expand                                          -      38     +38
bc_vec_init                                            -      37     +37
bc_vm_printf                                           -      36     +36
bc_num_printNewline                                    -      36     +36
bc_func_free                                           -      35     +35
bc_sig_msg                                             -      34     +34
bc_program_retire                                      -      34     +34
bc_lex_assign                                          -      34     +34
dc_parse_init                                          -      33     +33
bc_parse_init                                          -      33     +33
dc_sig_msg                                             -      31     +31
bc_vec_expand                                          -      30     +30
bc_num_ten                                             -      30     +30
bc_num_one                                             -      28     +28
bc_errs                                                -      28     +28
bc_vec_free                                            -      27     +27
bc_program_ops                                         -      24     +24
bc_vm_puts                                             -      23     +23
bc_num_printChar                                       -      23     +23
bc_program_ready_msg                                   -      22     +22
bc_vm_fflush                                           -      21     +21
dc_main                                               77      97     +20
bc_parse_next_rel                                      -      20     +20
bc_parse_next_read                                     -      20     +20
bc_parse_next_print                                    -      20     +20
bc_parse_next_param                                    -      20     +20
bc_parse_next_for                                      -      20     +20
bc_parse_next_expr                                     -      20     +20
bc_parse_next_elem                                     -      20     +20
bc_warn_fmt                                            -      17     +17
bc_vec_pushByte                                        -      15     +15
bc_string_free                                         -      15     +15
bc_num_setToZero                                       -      15     +15
bc_num_free                                            -      15     +15
bc_lex_file                                            -      15     +15
bc_id_free                                             -      15     +15
bc_err_fmt                                             -      15     +15
bc_vec_item_rev                                        -      14     +14
bc_id_cmp                                              -      12     +12
bc_num_zero                                            -      11     +11
bc_vec_item                                            -       9      +9
bc_program_stdin_name                                  -       8      +8
bc_program_scale                                       -       8      +8
bc_args_opt                                            -       8      +8
bc_func_read                                           -       7      +7
bc_func_main                                           -       7      +7
bc_err_line                                            -       7      +7
bc_lib_name                                            -       4      +4
bc_args_env_name                                       -       4      +4
applet_main                                         1604    1608      +4
dc_name                                                -       3      +3
bc_name                                                -       3      +3
applet_names                                        2781    2784      +3
static.bases                                           5       -      -5
check_under                                           20       -     -20
pop                                                   24       -     -24
print_no_pop                                          32       -     -32
sub                                                   34       -     -34
divide                                                34       -     -34
mul                                                   37       -     -37
add                                                   37       -     -37
push                                                  38       -     -38
print_stack_no_pop                                    40       -     -40
not                                                   72       -     -72
set_output_base                                       95       -     -95
or                                                   103       -    -103
eor                                                  103       -    -103
and                                                  103       -    -103
mod                                                  105       -    -105
stack_machine                                        116       -    -116
operators                                            144       -    -144
print_base                                           230       -    -230
------------------------------------------------------------------------------
(add/remove: 173/20 grow/shrink: 4/0 up/down: 38089/-1372)  Total: 36717 bytes
   text	   data	    bss	    dec	    hex	filename
 950181	    485	   7296	 957962	  e9e0a	busybox_old
 989722	    485	   7344	 997551	  f38af	busybox_unstripped

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-05 15:42:48 +01:00
Gavin Howard
01055ba89a bc: new applet, throws warning
Signed-off-by: Gavin Howard <yzena.tech@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2018-12-05 15:40:38 +01:00