/* vi: set sw=4 ts=4: */
/*
* tiny vi.c: A small 'vi' clone
* Copyright (C) 2000, 2001 Sterling Huxley <sterling@europa.com>
*
* Licensed under GPLv2 or later, see file LICENSE in this source tree.
*/
//
//Things To Do:
// ./.exrc
// add magic to search /foo.*bar
// add :help command
// :map macros
// if mark[] values were line numbers rather than pointers
// it would be easier to change the mark when add/delete lines
// More intelligence in refresh()
// ":r !cmd" and "!cmd" to filter text through an external command
// An "ex" line oriented mode- maybe using "cmdedit"
//config:config VI
//config: bool "vi (23 kb)"
//config: default y
//config: help
//config: 'vi' is a text editor. More specifically, it is the One True
//config: text editor <grin>. It does, however, have a rather steep
//config: learning curve. If you are not already comfortable with 'vi'
//config: you may wish to use something else.
//config:
//config:config FEATURE_VI_MAX_LEN
//config: int "Maximum screen width"
//config: range 256 16384
//config: default 4096
//config: depends on VI
//config: help
//config: Contrary to what you may think, this is not eating much.
//config: Make it smaller than 4k only if you are very limited on memory.
//config:
//config:config FEATURE_VI_8BIT
//config: bool "Allow to display 8-bit chars (otherwise shows dots)"
//config: default n
//config: depends on VI
//config: help
//config: If your terminal can display characters with high bit set,
//config: you may want to enable this. Note: vi is not Unicode-capable.
//config: If your terminal combines several 8-bit bytes into one character
//config: (as in Unicode mode), this will not work properly.
//config:
//config:config FEATURE_VI_COLON
//config: bool "Enable \":\" colon commands (no \"ex\" mode)"
//config: default y
//config: depends on VI
//config: help
//config: Enable a limited set of colon commands. This does not
//config: provide an "ex" mode.
//config:
//config:config FEATURE_VI_COLON_EXPAND
//config: bool "Expand \"%\" and \"#\" in colon commands"
//config: default y
//config: depends on FEATURE_VI_COLON
//config: help
//config: Expand the special characters \"%\" (current filename)
//config: and \"#\" (alternate filename) in colon commands.
//config:
//config:config FEATURE_VI_YANKMARK
//config: bool "Enable yank/put commands and mark cmds"
//config: default y
//config: depends on VI
//config: help
//config: This enables you to use yank and put, as well as mark.
//config:
//config:config FEATURE_VI_SEARCH
//config: bool "Enable search and replace cmds"
//config: default y
//config: depends on VI
//config: help
//config: Select this if you wish to be able to do search and replace.
//config:
//config:config FEATURE_VI_REGEX_SEARCH
//config: bool "Enable regex in search and replace"
//config: default n # Uses GNU regex, which may be unavailable. FIXME
//config: depends on FEATURE_VI_SEARCH
//config: help
//config: Use extended regex search.
//config:
//config:config FEATURE_VI_USE_SIGNALS
//config: bool "Catch signals"
//config: default y
//config: depends on VI
//config: help
//config: Selecting this option will make vi signal aware. This will support
//config: SIGWINCH to deal with Window Changes, catch ^Z and ^C and alarms.
//config:
//config:config FEATURE_VI_DOT_CMD
//config: bool "Remember previous cmd and \".\" cmd"
//config: default y
//config: depends on VI
//config: help
//config: Make vi remember the last command and be able to repeat it.
//config:
//config:config FEATURE_VI_READONLY
//config: bool "Enable -R option and \"view\" mode"
//config: default y
//config: depends on VI
//config: help
//config: Enable the read-only command line option, which allows the user to
//config: open a file in read-only mode.
//config:
//config:config FEATURE_VI_SETOPTS
//config: bool "Enable settable options, ai ic showmatch"
//config: default y
//config: depends on VI
//config: help
//config: Enable the editor to set some (ai, ic, showmatch) options.
//config:
//config:config FEATURE_VI_SET
//config: bool "Support :set"
//config: default y
//config: depends on VI
//config:
//config:config FEATURE_VI_WIN_RESIZE
//config: bool "Handle window resize"
//config: default y
//config: depends on VI
//config: help
//config: Behave nicely with terminals that get resized.
//config:
//config:config FEATURE_VI_ASK_TERMINAL
//config: bool "Use 'tell me cursor position' ESC sequence to measure window"
//config: default y
//config: depends on VI
//config: help
//config: If terminal size can't be retrieved and $LINES/$COLUMNS are not set,
//config: this option makes vi perform a last-ditch effort to find it:
//config: position cursor to 999,999 and ask terminal to report real
//config: cursor position using "ESC [ 6 n" escape sequence, then read stdin.
//config: This is not clean but helps a lot on serial lines and such.
//config:
//config:config FEATURE_VI_UNDO
//config: bool "Support undo command \"u\""
//config: default y
//config: depends on VI
//config: help
//config: Support the 'u' command to undo insertion, deletion, and replacement
//config: of text.
//config:
//config:config FEATURE_VI_UNDO_QUEUE
//config: bool "Enable undo operation queuing"
//config: default y
//config: depends on FEATURE_VI_UNDO
//config: help
//config: The vi undo functions can use an intermediate queue to greatly lower
//config: malloc() calls and overhead. When the maximum size of this queue is
//config: reached, the contents of the queue are committed to the undo stack.
//config: This increases the size of the undo code and allows some undo
//config: operations (especially un-typing/backspacing) to be far more useful.
//config:
//config:config FEATURE_VI_UNDO_QUEUE_MAX
//config: int "Maximum undo character queue size"
//config: default 256
//config: range 32 65536
//config: depends on FEATURE_VI_UNDO_QUEUE
//config: help
//config: This option sets the number of bytes used at runtime for the queue.
//config: Smaller values will create more undo objects and reduce the amount
//config: of typed or backspaced characters that are grouped into one undo
//config: operation; larger values increase the potential size of each undo
//config: and will generally malloc() larger objects and less frequently.
//config: Unless you want more (or less) frequent "undo points" while typing,
//config: you should probably leave this unchanged.
//config:
//config:config FEATURE_VI_VERBOSE_STATUS
//config: bool "Enable verbose status reporting"
//config: default y
//config: depends on VI
//config: help
//config: Enable more verbose reporting of the results of yank, change,
//config: delete, undo and substitution commands.
//applet:IF_VI(APPLET(vi, BB_DIR_BIN, BB_SUID_DROP))
//kbuild:lib-$(CONFIG_VI) += vi.o
//usage:#define vi_trivial_usage
//usage: IF_FEATURE_VI_COLON("[-c CMD] ")IF_FEATURE_VI_READONLY("[-R] ")"[-H] [FILE]..."
//usage:#define vi_full_usage "\n\n"
//usage: "Edit FILE\n"
//usage: IF_FEATURE_VI_COLON(
//usage: "\n -c CMD Initial command to run ($EXINIT and ~/.exrc also available)"
//usage: )
//usage: IF_FEATURE_VI_READONLY(
//usage: "\n -R Read-only"
//usage: )
//usage: "\n -H List available features"
// note: non-standard, "vim -H" is Hebrew mode (bidi support)
#include "libbb.h"
// Should be after libbb.h: on some systems regex.h needs sys/types.h:
#if ENABLE_FEATURE_VI_REGEX_SEARCH
# include <regex.h>
#endif
// the CRASHME code is unmaintained, and doesn't currently build
#define ENABLE_FEATURE_VI_CRASHME 0
#define IF_FEATURE_VI_CRASHME(...)
#if ENABLE_LOCALE_SUPPORT
#if ENABLE_FEATURE_VI_8BIT
//FIXME: this does not work properly for Unicode anyway
# define Isprint(c) (isprint)(c)
#else
# define Isprint(c) isprint_asciionly(c)
#endif
#else
// 0x9b is Meta-ESC
#if ENABLE_FEATURE_VI_8BIT
# define Isprint(c) ((unsigned char)(c) >= ' ' && (c) != 0x7f && (unsigned char)(c) != 0x9b)
#else
# define Isprint(c) ((unsigned char)(c) >= ' ' && (unsigned char)(c) < 0x7f)
#endif
#endif
enum {
MAX_TABSTOP = 32, // sanity limit
// User input len. Need not be extra big.
// Lines in file being edited *can* be bigger than this.
MAX_INPUT_LEN = 128,
// Sanity limits. We have only one buffer of this size.
MAX_SCR_COLS = CONFIG_FEATURE_VI_MAX_LEN,
MAX_SCR_ROWS = CONFIG_FEATURE_VI_MAX_LEN,
};
// VT102 ESC sequences.
// See "Xterm Control Sequences"
// http://invisible-island.net/xterm/ctlseqs/ctlseqs.html
#define ESC "\033"
// Inverse/Normal text
#define ESC_BOLD_TEXT ESC"[7m"
#define ESC_NORM_TEXT ESC"[m"
// Bell
#define ESC_BELL "\007"
// Clear-to-end-of-line
#define ESC_CLEAR2EOL ESC"[K"
// Clear-to-end-of-screen.
// (We use default param here.
// Full sequence is "ESC [ <num> J",
// <num> is 0/1/2 = "erase below/above/all".)
#define ESC_CLEAR2EOS ESC"[J"
// Cursor to given coordinate (1,1: top left)
#define ESC_SET_CURSOR_POS ESC"[%u;%uH"
#define ESC_SET_CURSOR_TOPLEFT ESC"[H"
//UNUSED
//// Cursor up and down
//#define ESC_CURSOR_UP ESC"[A"
//#define ESC_CURSOR_DOWN "\n"
#if ENABLE_FEATURE_VI_DOT_CMD
// cmds modifying text[]
static const char modifying_cmds[] ALIGN1 = "aAcCdDiIJoOpPrRs""xX<>~";
#endif
enum {
YANKONLY = FALSE,
YANKDEL = TRUE,
FORWARD = 1, // code depends on "1" for array index
BACK = -1, // code depends on "-1" for array index
LIMITED = 0, // char_search() only current line
FULL = 1, // char_search() to the end/beginning of entire text
PARTIAL = 0, // buffer contains partial line
WHOLE = 1, // buffer contains whole lines
MULTI = 2, // buffer may include newlines
S_BEFORE_WS = 1, // used in skip_thing() for moving "dot"
S_TO_WS = 2, // used in skip_thing() for moving "dot"
S_OVER_WS = 3, // used in skip_thing() for moving "dot"
S_END_PUNCT = 4, // used in skip_thing() for moving "dot"
S_END_ALNUM = 5, // used in skip_thing() for moving "dot"
C_END = -1, // cursor is at end of line due to '$' command
};
// vi.c expects chars to be unsigned.
// busybox build system provides that, but it's better
// to audit and fix the source
struct globals {
// many references - keep near the top of globals
char *text, *end; // pointers to the user data in memory
char *dot; // where all the action takes place
int text_size; // size of the allocated buffer
// the rest
#if ENABLE_FEATURE_VI_SETOPTS
smallint vi_setops; // set by setops()
#define VI_AUTOINDENT (1 << 0)
#define VI_EXPANDTAB (1 << 1)
#define VI_ERR_METHOD (1 << 2)
#define VI_IGNORECASE (1 << 3)
#define VI_SHOWMATCH (1 << 4)
#define VI_TABSTOP (1 << 5)
#define autoindent (vi_setops & VI_AUTOINDENT)
#define expandtab (vi_setops & VI_EXPANDTAB )
#define err_method (vi_setops & VI_ERR_METHOD) // indicate error with beep or flash
#define ignorecase (vi_setops & VI_IGNORECASE)
#define showmatch (vi_setops & VI_SHOWMATCH )
// order of constants and strings must match
#define OPTS_STR \
"ai\0""autoindent\0" \
"et\0""expandtab\0" \
"fl\0""flash\0" \
"ic\0""ignorecase\0" \
"sm\0""showmatch\0" \
"ts\0""tabstop\0"
#else
#define autoindent (0)
#define expandtab (0)
#define err_method (0)
#define ignorecase (0)
#endif
#if ENABLE_FEATURE_VI_READONLY
smallint readonly_mode;
#define SET_READONLY_FILE(flags) ((flags) |= 0x01)
#define SET_READONLY_MODE(flags) ((flags) |= 0x02)
#define UNSET_READONLY_FILE(flags) ((flags) &= 0xfe)
#else
#define SET_READONLY_FILE(flags) ((void)0)
#define SET_READONLY_MODE(flags) ((void)0)
#define UNSET_READONLY_FILE(flags) ((void)0)
#endif
smallint editing; // >0 while we are editing a file
// [code audit says "can be 0, 1 or 2 only"]
smallint cmd_mode; // 0=command 1=insert 2=replace
int modified_count; // buffer contents changed if !0
int last_modified_count; // = -1;
int cmdline_filecnt; // how many file names on cmd line
int cmdcnt; // repetition count
unsigned rows, columns; // the terminal screen is this size
#if ENABLE_FEATURE_VI_ASK_TERMINAL
int get_rowcol_error;
#endif
int crow, ccol; // cursor is on Crow x Ccol
int offset; // chars scrolled off the screen to the left
int have_status_msg; // is default edit status needed?
// [don't make smallint!]
int last_status_cksum; // hash of current status line
char *current_filename;
#if ENABLE_FEATURE_VI_COLON_EXPAND
char *alt_filename;
#endif
char *screenbegin; // index into text[], of top line on the screen
char *screen; // pointer to the virtual screen buffer
int screensize; // and its size
int tabstop;
int last_search_char; // last char searched for (int because of Unicode)
smallint last_search_cmd; // command used to invoke last char search
#if ENABLE_FEATURE_VI_CRASHME
char last_input_char; // last char read from user
#endif
#if ENABLE_FEATURE_VI_UNDO_QUEUE
char undo_queue_state; // One of UNDO_INS, UNDO_DEL, UNDO_EMPTY
#endif
#if ENABLE_FEATURE_VI_DOT_CMD
smallint adding2q; // are we currently adding user input to q
int lmc_len; // length of last_modifying_cmd
char *ioq, *ioq_start; // pointer to string for get_one_char to "read"
int dotcnt; // number of times to repeat '.' command
#endif
#if ENABLE_FEATURE_VI_SEARCH
char *last_search_pattern; // last pattern from a '/' or '?' search
#endif
#if ENABLE_FEATURE_VI_SETOPTS
int indentcol; // column of recently autoindent, 0 or -1
#endif
smallint cmd_error;
// former statics
#if ENABLE_FEATURE_VI_YANKMARK
char *edit_file__cur_line;
#endif
int refresh__old_offset;
int format_edit_status__tot;
// a few references only
#if ENABLE_FEATURE_VI_YANKMARK
smalluint YDreg;//,Ureg;// default delete register and orig line for "U"
#define Ureg 27
char *reg[28]; // named register a-z, "D", and "U" 0-25,26,27
char regtype[28]; // buffer type: WHOLE, MULTI or PARTIAL
char *mark[28]; // user marks points somewhere in text[]- a-z and previous context ''
#endif
#if ENABLE_FEATURE_VI_USE_SIGNALS
sigjmp_buf restart; // int_handler() jumps to location remembered here
#endif
struct termios term_orig; // remember what the cooked mode was
int cindex; // saved character index for up/down motion
smallint keep_index; // retain saved character index
#if ENABLE_FEATURE_VI_COLON
llist_t *initial_cmds;
#endif
// Should be just enough to hold a key sequence,
// but CRASHME mode uses it as generated command buffer too
#if ENABLE_FEATURE_VI_CRASHME
char readbuffer[128];
#else
char readbuffer[KEYCODE_BUFFER_SIZE];
#endif
#define STATUS_BUFFER_LEN 200
char status_buffer[STATUS_BUFFER_LEN]; // messages to the user
#if ENABLE_FEATURE_VI_DOT_CMD
char last_modifying_cmd[MAX_INPUT_LEN]; // last modifying cmd for "."
#endif
char get_input_line__buf[MAX_INPUT_LEN]; // former static
char scr_out_buf[MAX_SCR_COLS + MAX_TABSTOP * 2];
#if ENABLE_FEATURE_VI_UNDO
// undo_push() operations
#define UNDO_INS 0
#define UNDO_DEL 1
#define UNDO_INS_CHAIN 2
#define UNDO_DEL_CHAIN 3
# if ENABLE_FEATURE_VI_UNDO_QUEUE
#define UNDO_INS_QUEUED 4
#define UNDO_DEL_QUEUED 5
# endif
// Pass-through flags for functions that can be undone
#define NO_UNDO 0
#define ALLOW_UNDO 1
#define ALLOW_UNDO_CHAIN 2
# if ENABLE_FEATURE_VI_UNDO_QUEUE
#define ALLOW_UNDO_QUEUED 3
# else
// If undo queuing disabled, don't invoke the missing queue logic
#define ALLOW_UNDO_QUEUED ALLOW_UNDO
# endif
struct undo_object {
struct undo_object *prev; // Linking back avoids list traversal (LIFO)
int start; // Offset where the data should be restored/deleted
int length; // total data size
uint8_t u_type; // 0=deleted, 1=inserted, 2=swapped
char undo_text[1]; // text that was deleted (if deletion)
} *undo_stack_tail;
# if ENABLE_FEATURE_VI_UNDO_QUEUE
#define UNDO_USE_SPOS 32
#define UNDO_EMPTY 64
char *undo_queue_spos; // Start position of queued operation
int undo_q;
char undo_queue[CONFIG_FEATURE_VI_UNDO_QUEUE_MAX];
# endif
#endif /* ENABLE_FEATURE_VI_UNDO */
};
#define G (*ptr_to_globals)
#define text (G.text )
#define text_size (G.text_size )
#define end (G.end )
#define dot (G.dot )
#define reg (G.reg )
#define vi_setops (G.vi_setops )
#define editing (G.editing )
#define cmd_mode (G.cmd_mode )
#define modified_count (G.modified_count )
#define last_modified_count (G.last_modified_count)
#define cmdline_filecnt (G.cmdline_filecnt )
#define cmdcnt (G.cmdcnt )
#define rows (G.rows )
#define columns (G.columns )
#define crow (G.crow )
#define ccol (G.ccol )
#define offset (G.offset )
#define status_buffer (G.status_buffer )
#define have_status_msg (G.have_status_msg )
#define last_status_cksum (G.last_status_cksum )
#define current_filename (G.current_filename )
#define alt_filename (G.alt_filename )
#define screen (G.screen )
#define screensize (G.screensize )
#define screenbegin (G.screenbegin )
#define tabstop (G.tabstop )
#define last_search_char (G.last_search_char )
#define last_search_cmd (G.last_search_cmd )
#if ENABLE_FEATURE_VI_CRASHME
#define last_input_char (G.last_input_char )
#endif
#if ENABLE_FEATURE_VI_READONLY
#define readonly_mode (G.readonly_mode )
#else
#define readonly_mode 0
#endif
#define adding2q (G.adding2q )
#define lmc_len (G.lmc_len )
#define ioq (G.ioq )
#define ioq_start (G.ioq_start )
#define dotcnt (G.dotcnt )
#define last_search_pattern (G.last_search_pattern)
#define indentcol (G.indentcol )
#define cmd_error (G.cmd_error )
#define edit_file__cur_line (G.edit_file__cur_line)
#define refresh__old_offset (G.refresh__old_offset)
#define format_edit_status__tot (G.format_edit_status__tot)
#define YDreg (G.YDreg )
//#define Ureg (G.Ureg )
#define regtype (G.regtype )
#define mark (G.mark )
#define restart (G.restart )
#define term_orig (G.term_orig )
#define cindex (G.cindex )
#define keep_index (G.keep_index )
#define initial_cmds (G.initial_cmds )
#define readbuffer (G.readbuffer )
#define scr_out_buf (G.scr_out_buf )
#define last_modifying_cmd (G.last_modifying_cmd )
#define get_input_line__buf (G.get_input_line__buf)
#if ENABLE_FEATURE_VI_UNDO
#define undo_stack_tail (G.undo_stack_tail )
# if ENABLE_FEATURE_VI_UNDO_QUEUE
#define undo_queue_state (G.undo_queue_state)
#define undo_q (G.undo_q )
#define undo_queue (G.undo_queue )
#define undo_queue_spos (G.undo_queue_spos )
# endif
#endif
#define INIT_G() do { \
SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \
last_modified_count = -1; \
/* "" but has space for 2 chars: */ \
IF_FEATURE_VI_SEARCH(last_search_pattern = xzalloc(2);) \
tabstop = 8; \
} while (0)
#if ENABLE_FEATURE_VI_CRASHME
static int crashme = 0;
#endif
static void show_status_line(void); // put a message on the bottom line
static void status_line_bold(const char *, ...);
static void show_help(void)
{
puts("These features are available:"
#if ENABLE_FEATURE_VI_SEARCH
"\n\tPattern searches with / and ?"
#endif
#if ENABLE_FEATURE_VI_DOT_CMD
"\n\tLast command repeat with ."
#endif
#if ENABLE_FEATURE_VI_YANKMARK
"\n\tLine marking with 'x"
"\n\tNamed buffers with \"x"
#endif
#if ENABLE_FEATURE_VI_READONLY
//not implemented: "\n\tReadonly if vi is called as \"view\""
//redundant: usage text says this too: "\n\tReadonly with -R command line arg"
#endif
#if ENABLE_FEATURE_VI_SET
"\n\tSome colon mode commands with :"
#endif
#if ENABLE_FEATURE_VI_SETOPTS
"\n\tSettable options with \":set\""
#endif
#if ENABLE_FEATURE_VI_USE_SIGNALS
"\n\tSignal catching- ^C"
"\n\tJob suspend and resume with ^Z"
#endif
#if ENABLE_FEATURE_VI_WIN_RESIZE
"\n\tAdapt to window re-sizes"
#endif
);
}
static void write1(const char *out)
{
fputs_stdout(out);
}
#if ENABLE_FEATURE_VI_WIN_RESIZE
static int query_screen_dimensions(void)
{
int err = get_terminal_width_height(STDIN_FILENO, &columns, &rows);
if (rows > MAX_SCR_ROWS)
rows = MAX_SCR_ROWS;
if (columns > MAX_SCR_COLS)
columns = MAX_SCR_COLS;
return err;
}
#else
static ALWAYS_INLINE int query_screen_dimensions(void)
{
return 0;
}
#endif
// sleep for 'h' 1/100 seconds, return 1/0 if stdin is (ready for read)/(not ready)
static int mysleep(int hund)
{
struct pollfd pfd[1];
if (hund != 0)
fflush_all();
pfd[0].fd = STDIN_FILENO;
pfd[0].events = POLLIN;
return safe_poll(pfd, 1, hund*10) > 0;
}
//----- Set terminal attributes --------------------------------
static void rawmode(void)
{
// no TERMIOS_CLEAR_ISIG: leave ISIG on - allow signals
set_termios_to_raw(STDIN_FILENO, &term_orig, TERMIOS_RAW_CRNL);
}
static void cookmode(void)
{
fflush_all();
tcsetattr_stdin_TCSANOW(&term_orig);
}
//----- Terminal Drawing ---------------------------------------
// The terminal is made up of 'rows' line of 'columns' columns.
// classically this would be 24 x 80.
// screen coordinates
// 0,0 ... 0,79
// 1,0 ... 1,79
// . ... .
// . ... .
// 22,0 ... 22,79
// 23,0 ... 23,79 <- status line
//----- Move the cursor to row x col (count from 0, not 1) -------
static void place_cursor(int row, int col)
{
char cm1[sizeof(ESC_SET_CURSOR_POS) + sizeof(int)*3 * 2];
if (row < 0) row = 0;
if (row >= rows) row = rows - 1;
if (col < 0) col = 0;
if (col >= columns) col = columns - 1;
sprintf(cm1, ESC_SET_CURSOR_POS, row + 1, col + 1);
write1(cm1);
}
//----- Erase from cursor to end of line -----------------------
static void clear_to_eol(void)
{
write1(ESC_CLEAR2EOL);
}
static void go_bottom_and_clear_to_eol(void)
{
place_cursor(rows - 1, 0);
clear_to_eol();
}
//----- Start standout mode ------------------------------------
static void standout_start(void)
{
write1(ESC_BOLD_TEXT);
}
//----- End standout mode --------------------------------------
static void standout_end(void)
{
write1(ESC_NORM_TEXT);
}
//----- Text Movement Routines ---------------------------------
static char *begin_line(char *p) // return pointer to first char cur line
{
if (p > text) {
p = memrchr(text, '\n', p - text);
if (!p)
return text;
return p + 1;
}
return p;
}
static char *end_line(char *p) // return pointer to NL of cur line
{
if (p < end - 1) {
p = memchr(p, '\n', end - p - 1);
if (!p)
return end - 1;
}
return p;
}
static char *dollar_line(char *p) // return pointer to just before NL line
{
p = end_line(p);
// Try to stay off of the Newline
if (*p == '\n' && (p - begin_line(p)) > 0)
p--;
return p;
}
static char *prev_line(char *p) // return pointer first char prev line
{
p = begin_line(p); // goto beginning of cur line
if (p > text && p[-1] == '\n')
p--; // step to prev line
p = begin_line(p); // goto beginning of prev line
return p;
}
static char *next_line(char *p) // return pointer first char next line
{
p = end_line(p);
if (p < end - 1 && *p == '\n')
p++; // step to next line
return p;
}
//----- Text Information Routines ------------------------------
static char *end_screen(void)
{
char *q;
int cnt;
// find new bottom line
q = screenbegin;
for (cnt = 0; cnt < rows - 2; cnt++)
q = next_line(q);
q = end_line(q);
return q;
}
// count line from start to stop
static int count_lines(char *start, char *stop)
{
char *q;
int cnt;
if (stop < start) { // start and stop are backwards- reverse them
q = start;
start = stop;
stop = q;
}
cnt = 0;
stop = end_line(stop);
while (start <= stop && start <= end - 1) {
start = end_line(start);
if (*start == '\n')
cnt++;
start++;
}
return cnt;
}
static char *find_line(int li) // find beginning of line #li
{
char *q;
for (q = text; li > 1; li--) {
q = next_line(q);
}
return q;
}
static int next_tabstop(int col)
{
return col + ((tabstop - 1) - (col % tabstop));
}
static int prev_tabstop(int col)
{
return col - ((col % tabstop) ?: tabstop);
}
static int next_column(char c, int co)
{
if (c == '\t')
co = next_tabstop(co);
else if ((unsigned char)c < ' ' || c == 0x7f)
co++; // display as ^X, use 2 columns
return co + 1;
}
static int get_column(char *p)
{
const char *r;
int co = 0;
for (r = begin_line(p); r < p; r++)
co = next_column(*r, co);
return co;
}
//----- Erase the Screen[] memory ------------------------------
static void screen_erase(void)
{
memset(screen, ' ', screensize); // clear new screen
}
static void new_screen(int ro, int co)
{
char *s;
free(screen);
screensize = ro * co + 8;
s = screen = xmalloc(screensize);
// initialize the new screen. assume this will be a empty file.
screen_erase();
// non-existent text[] lines start with a tilde (~).
//screen[(1 * co) + 0] = '~';
//screen[(2 * co) + 0] = '~';
//..
//screen[((ro-2) * co) + 0] = '~';
ro -= 2;
while (--ro >= 0) {
s += co;
*s = '~';
}
}
//----- Synchronize the cursor to Dot --------------------------
static void sync_cursor(char *d, int *row, int *col)
{
char *beg_cur; // begin and end of "d" line
char *tp;
int cnt, ro, co;
beg_cur = begin_line(d); // first char of cur line
if (beg_cur < screenbegin) {
// "d" is before top line on screen
// how many lines do we have to move
cnt = count_lines(beg_cur, screenbegin);
sc1:
screenbegin = beg_cur;
if (cnt > (rows - 1) / 2) {
// we moved too many lines. put "dot" in middle of screen
for (cnt = 0; cnt < (rows - 1) / 2; cnt++) {
screenbegin = prev_line(screenbegin);
}
}
} else {
char *end_scr; // begin and end of screen
end_scr = end_screen(); // last char of screen
if (beg_cur > end_scr) {
// "d" is after bottom line on screen
// how many lines do we have to move
cnt = count_lines(end_scr, beg_cur);
if (cnt > (rows - 1) / 2)
goto sc1; // too many lines
for (ro = 0; ro < cnt - 1; ro++) {
// move screen begin the same amount
screenbegin = next_line(screenbegin);
// now, move the end of screen
end_scr = next_line(end_scr);
end_scr = end_line(end_scr);
}
}
}
// "d" is on screen- find out which row
tp = screenbegin;
for (ro = 0; ro < rows - 1; ro++) { // drive "ro" to correct row
if (tp == beg_cur)
break;
tp = next_line(tp);
}
// find out what col "d" is on
co = 0;
do { // drive "co" to correct column
if (*tp == '\n') //vda || *tp == '\0')
break;
co = next_column(*tp, co) - 1;
// inserting text before a tab, don't include its position
if (cmd_mode && tp == d - 1 && *d == '\t') {
co++;
break;
}
} while (tp++ < d && ++co);
// "co" is the column where "dot" is.
// The screen has "columns" columns.
// The currently displayed columns are 0+offset -- columns+ofset
// |-------------------------------------------------------------|
// ^ ^ ^
// offset | |------- columns ----------------|
//
// If "co" is already in this range then we do not have to adjust offset
// but, we do have to subtract the "offset" bias from "co".
// If "co" is outside this range then we have to change "offset".
// If the first char of a line is a tab the cursor will try to stay
// in column 7, but we have to set offset to 0.
if (co < 0 + offset) {
offset = co;
}
if (co >= columns + offset) {
offset = co - columns + 1;
}
// if the first char of the line is a tab, and "dot" is sitting on it
// force offset to 0.
if (d == beg_cur && *d == '\t') {
offset = 0;
}
co -= offset;
*row = ro;
*col = co;
}
//----- Format a text[] line into a buffer ---------------------
static char* format_line(char *src /*, int li*/)
{
unsigned char c;
int co;
int ofs = offset;
char *dest = scr_out_buf; // [MAX_SCR_COLS + MAX_TABSTOP * 2]
c = '~'; // char in col 0 in non-existent lines is '~'
co = 0;
while (co < columns + tabstop) {
// have we gone past the end?
if (src < end) {
c = *src++;
if (c == '\n')
break;
if ((c & 0x80) && !Isprint(c)) {
c = '.';
}
if (c < ' ' || c == 0x7f) {
if (c == '\t') {
c = ' ';
// co % 8 != 7
while ((co % tabstop) != (tabstop - 1)) {
dest[co++] = c;
}
} else {
dest[co++] = '^';
if (c == 0x7f)
c = '?';
else
c += '@'; // Ctrl-X -> 'X'
}
}
}
dest[co++] = c;
// discard scrolled-off-to-the-left portion,
// in tabstop-sized pieces
if (ofs >= tabstop && co >= tabstop) {
memmove(dest, dest + tabstop, co);
co -= tabstop;
ofs -= tabstop;
}
if (src >= end)
break;
}
// check "short line, gigantic offset" case
if (co < ofs)
ofs = co;
// discard last scrolled off part
co -= ofs;
dest += ofs;
// fill the rest with spaces
if (co < columns)
memset(&dest[co], ' ', columns - co);
return dest;
}
//----- Refresh the changed screen lines -----------------------
// Copy the source line from text[] into the buffer and note
// if the current screenline is different from the new buffer.
// If they differ then that line needs redrawing on the terminal.
//
static void refresh(int full_screen)
{
#define old_offset refresh__old_offset
int li, changed;
char *tp, *sp; // pointer into text[] and screen[]
if (ENABLE_FEATURE_VI_WIN_RESIZE IF_FEATURE_VI_ASK_TERMINAL(&& !G.get_rowcol_error) ) {
unsigned c = columns, r = rows;
query_screen_dimensions();
#if ENABLE_FEATURE_VI_USE_SIGNALS
full_screen |= (c - columns) | (r - rows);
#else
if (c != columns || r != rows) {
full_screen = TRUE;
// update screen memory since SIGWINCH won't have done it
new_screen(rows, columns);
}
#endif
}
sync_cursor(dot, &crow, &ccol); // where cursor will be (on "dot")
tp = screenbegin; // index into text[] of top line
// compare text[] to screen[] and mark screen[] lines that need updating
for (li = 0; li < rows - 1; li++) {
int cs, ce; // column start & end
char *out_buf;
// format current text line
out_buf = format_line(tp /*, li*/);
// skip to the end of the current text[] line
if (tp < end) {
char *t = memchr(tp, '\n', end - tp);
if (!t) t = end - 1;
tp = t + 1;
}
// see if there are any changes between virtual screen and out_buf
changed = FALSE; // assume no change
cs = 0;
ce = columns - 1;
sp = &screen[li * columns]; // start of screen line
if (full_screen) {
// force re-draw of every single column from 0 - columns-1
goto re0;
}
// compare newly formatted buffer with virtual screen
// look forward for first difference between buf and screen
for (; cs <= ce; cs++) {
if (out_buf[cs] != sp[cs]) {
changed = TRUE; // mark for redraw
break;
}
}
// look backward for last difference between out_buf and screen
for (; ce >= cs; ce--) {
if (out_buf[ce] != sp[ce]) {
changed = TRUE; // mark for redraw
break;
}
}
// now, cs is index of first diff, and ce is index of last diff
// if horz offset has changed, force a redraw
if (offset != old_offset) {
re0:
changed = TRUE;
}
// make a sanity check of columns indexes
if (cs < 0) cs = 0;
if (ce > columns - 1) ce = columns - 1;
if (cs > ce) { cs = 0; ce = columns - 1; }
// is there a change between virtual screen and out_buf
if (changed) {
// copy changed part of buffer to virtual screen
memcpy(sp+cs, out_buf+cs, ce-cs+1);
place_cursor(li, cs);
// write line out to terminal
fwrite(&sp[cs], ce - cs + 1, 1, stdout);
}
}
place_cursor(crow, ccol);
if (!keep_index)
cindex = ccol + offset;
old_offset = offset;
#undef old_offset
}
//----- Force refresh of all Lines -----------------------------
static void redraw(int full_screen)
{
// cursor to top,left; clear to the end of screen
write1(ESC_SET_CURSOR_TOPLEFT ESC_CLEAR2EOS);
screen_erase(); // erase the internal screen buffer
last_status_cksum = 0; // force status update
refresh(full_screen); // this will redraw the entire display
show_status_line();
}
//----- Flash the screen --------------------------------------
static void flash(int h)
{
standout_start();
redraw(TRUE);
mysleep(h);
standout_end();
redraw(TRUE);
}
static void indicate_error(void)
{
#if ENABLE_FEATURE_VI_CRASHME
if (crashme > 0)
return;
#endif
cmd_error = TRUE;
if (!err_method) {
write1(ESC_BELL);
} else {
flash(10);
}
}
//----- IO Routines --------------------------------------------
static int readit(void) // read (maybe cursor) key from stdin
{
int c;
fflush_all();
// Wait for input. TIMEOUT = -1 makes read_key wait even
// on nonblocking stdin.
// Note: read_key sets errno to 0 on success.
again:
c = read_key(STDIN_FILENO, readbuffer, /*timeout:*/ -1);
if (c == -1) { // EOF/error
if (errno == EAGAIN) // paranoia
goto again;
go_bottom_and_clear_to_eol();
cookmode(); // terminal to "cooked"
bb_simple_error_msg_and_die("can't read user input");
}
return c;
}
#if ENABLE_FEATURE_VI_DOT_CMD
static int get_one_char(void)
{
int c;
if (!adding2q) {
// we are not adding to the q.
// but, we may be reading from a saved q.
// (checking "ioq" for NULL is wrong, it's not reset to NULL
// when done - "ioq_start" is reset instead).
if (ioq_start != NULL) {
// there is a queue to get chars from.
// careful with correct sign expansion!
c = (unsigned char)*ioq++;
if (c != '\0')
return c;
// the end of the q
free(ioq_start);
ioq_start = NULL;
// read from STDIN:
}
return readit();
}
// we are adding STDIN chars to q.
c = readit();
if (lmc_len >= ARRAY_SIZE(last_modifying_cmd) - 2) {
// last_modifying_cmd[] is too small, can't remember the cmd
// - drop it
adding2q = 0;
lmc_len = 0;
} else {
last_modifying_cmd[lmc_len++] = c;
}
return c;
}
#else
# define get_one_char() readit()
#endif
// Get type of thing to operate on and adjust count
static int get_motion_char(void)
{
int c, cnt;
c = get_one_char();
if (isdigit(c)) {
if (c != '0') {
// get any non-zero motion count
for (cnt = 0; isdigit(c); c = get_one_char())
cnt = cnt * 10 + (c - '0');
cmdcnt = (cmdcnt ?: 1) * cnt;
} else {
// ensure standalone '0' works
cmdcnt = 0;
}
}
return c;
}
// Get input line (uses "status line" area)
static char *get_input_line(const char *prompt)
{
// char [MAX_INPUT_LEN]
#define buf get_input_line__buf
int c;
int i;
strcpy(buf, prompt);
last_status_cksum = 0; // force status update
go_bottom_and_clear_to_eol();
write1(buf); // write out the :, /, or ? prompt
i = strlen(buf);
while (i < MAX_INPUT_LEN - 1) {
c = get_one_char();
if (c == '\n' || c == '\r' || c == 27)
break; // this is end of input
if (c == term_orig.c_cc[VERASE] || c == 8 || c == 127) {
// user wants to erase prev char
write1("\b \b"); // erase char on screen
buf[--i] = '\0';
if (i <= 0) // user backs up before b-o-l, exit
break;
} else if (c > 0 && c < 256) { // exclude Unicode
// (TODO: need to handle Unicode)
buf[i] = c;
buf[++i] = '\0';
bb_putchar(c);
}
}
refresh(FALSE);
return buf;
#undef buf
}
static void Hit_Return(void)
{
int c;
standout_start();
write1("[Hit return to continue]");
standout_end();
while ((c = get_one_char()) != '\n' && c != '\r')
continue;
redraw(TRUE); // force redraw all
}
//----- Draw the status line at bottom of the screen -------------
// show file status on status line
static int format_edit_status(void)
{
static const char cmd_mode_indicator[] ALIGN1 = "-IR-";
#define tot format_edit_status__tot
int cur, percent, ret, trunc_at;
// modified_count is now a counter rather than a flag. this
// helps reduce the amount of line counting we need to do.
// (this will cause a mis-reporting of modified status
// once every MAXINT editing operations.)
// it would be nice to do a similar optimization here -- if
// we haven't done a motion that could have changed which line
// we're on, then we shouldn't have to do this count_lines()
cur = count_lines(text, dot);
// count_lines() is expensive.
// Call it only if something was changed since last time
// we were here:
if (modified_count != last_modified_count) {
tot = cur + count_lines(dot, end - 1) - 1;
last_modified_count = modified_count;
}
// current line percent
// ------------- ~~ ----------
// total lines 100
if (tot > 0) {
percent = (100 * cur) / tot;
} else {
cur = tot = 0;
percent = 100;
}
trunc_at = columns < STATUS_BUFFER_LEN-1 ?
columns : STATUS_BUFFER_LEN-1;
ret = snprintf(status_buffer, trunc_at+1,
#if ENABLE_FEATURE_VI_READONLY
"%c %s%s%s %d/%d %d%%",
#else
"%c %s%s %d/%d %d%%",
#endif
cmd_mode_indicator[cmd_mode & 3],
(current_filename != NULL ? current_filename : "No file"),
#if ENABLE_FEATURE_VI_READONLY
(readonly_mode ? " [Readonly]" : ""),
#endif
(modified_count ? " [Modified]" : ""),
cur, tot, percent);
if (ret >= 0 && ret < trunc_at)
return ret; // it all fit
return trunc_at; // had to truncate
#undef tot
}
static int bufsum(char *buf, int count)
{
int sum = 0;
char *e = buf + count;
while (buf < e)
sum += (unsigned char) *buf++;
return sum;
}
static void show_status_line(void)
{
int cnt = 0, cksum = 0;
// either we already have an error or status message, or we
// create one.
if (!have_status_msg) {
cnt = format_edit_status();
cksum = bufsum(status_buffer, cnt);
}
if (have_status_msg || ((cnt > 0 && last_status_cksum != cksum))) {
last_status_cksum = cksum; // remember if we have seen this line
go_bottom_and_clear_to_eol();
write1(status_buffer);
if (have_status_msg) {
if (((int)strlen(status_buffer) - (have_status_msg - 1)) >
(columns - 1) ) {
have_status_msg = 0;
Hit_Return();
}
have_status_msg = 0;
}
place_cursor(crow, ccol); // put cursor back in correct place
}
fflush_all();
}
//----- format the status buffer, the bottom line of screen ------
static void status_line(const char *format, ...)
{
va_list args;
va_start(args, format);
vsnprintf(status_buffer, STATUS_BUFFER_LEN, format, args);
va_end(args);
have_status_msg = 1;
}
static void status_line_bold(const char *format, ...)
{
va_list args;
va_start(args, format);
strcpy(status_buffer, ESC_BOLD_TEXT);
vsnprintf(status_buffer + (sizeof(ESC_BOLD_TEXT)-1),
STATUS_BUFFER_LEN - sizeof(ESC_BOLD_TEXT) - sizeof(ESC_NORM_TEXT),
format, args
);
strcat(status_buffer, ESC_NORM_TEXT);
va_end(args);
have_status_msg = 1 + (sizeof(ESC_BOLD_TEXT)-1) + (sizeof(ESC_NORM_TEXT)-1);
}
static void status_line_bold_errno(const char *fn)
{
status_line_bold("'%s' "STRERROR_FMT, fn STRERROR_ERRNO);
}
// copy s to buf, convert unprintable
static void print_literal(char *buf, const char *s)
{
char *d;
unsigned char c;
if (!s[0])
s = "(NULL)";
d = buf;
for (; *s; s++) {
c = *s;
if ((c & 0x80) && !Isprint(c))
c = '?';
if (c < ' ' || c == 0x7f) {
*d++ = '^';
c |= '@'; // 0x40
if (c == 0x7f)
c = '?';
}
*d++ = c;
*d = '\0';
if (d - buf > MAX_INPUT_LEN - 10) // paranoia
break;
}
}
static void not_implemented(const char *s)
{
char buf[MAX_INPUT_LEN];
print_literal(buf, s);
status_line_bold("'%s' is not implemented", buf);
}
//----- Block insert/delete, undo ops --------------------------
#if ENABLE_FEATURE_VI_YANKMARK
// copy text into a register
static char *text_yank(char *p, char *q, int dest, int buftype)
{
char *oldreg = reg[dest];
int cnt = q - p;
if (cnt < 0) { // they are backwards- reverse them
p = q;
cnt = -cnt;
}
// Don't free register yet. This prevents the memory allocator
// from reusing the free block so we can detect if it's changed.
reg[dest] = xstrndup(p, cnt + 1);
regtype[dest] = buftype;
free(oldreg);
return p;
}
static char what_reg(void)
{
char c;
c = 'D'; // default to D-reg
if (YDreg <= 25)
c = 'a' + (char) YDreg;
if (YDreg == 26)
c = 'D';
if (YDreg == 27)
c = 'U';
return c;
}
static void check_context(char cmd)
{
// Certain movement commands update the context.
if (strchr(":%{}'GHLMz/?Nn", cmd) != NULL) {
mark[27] = mark[26]; // move cur to prev
mark[26] = dot; // move local to cur
}
}
static char *swap_context(char *p) // goto new context for '' command make this the current context
{
char *tmp;
// the current context is in mark[26]
// the previous context is in mark[27]
// only swap context if other context is valid
if (text <= mark[27] && mark[27] <= end - 1) {
tmp = mark[27];
mark[27] = p;
mark[26] = p = tmp;
}
return p;
}
# if ENABLE_FEATURE_VI_VERBOSE_STATUS
static void yank_status(const char *op, const char *p, int cnt)
{
int lines, chars;
lines = chars = 0;
while (*p) {
++chars;
if (*p++ == '\n')
++lines;
}
status_line("%s %d lines (%d chars) from [%c]",
op, lines * cnt, chars * cnt, what_reg());
}
# endif
#endif /* FEATURE_VI_YANKMARK */
#if ENABLE_FEATURE_VI_UNDO
static void undo_push(char *, unsigned, int);
#endif
// open a hole in text[]
// might reallocate text[]! use p += text_hole_make(p, ...),
// and be careful to not use pointers into potentially freed text[]!
static uintptr_t text_hole_make(char *p, int size) // at "p", make a 'size' byte hole
{
uintptr_t bias = 0;
if (size <= 0)
return bias;
end += size; // adjust the new END
if (end >= (text + text_size)) {
char *new_text;
text_size += end - (text + text_size) + 10240;
new_text = xrealloc(text, text_size);
bias = (new_text - text);
screenbegin += bias;
dot += bias;
end += bias;
p += bias;
#if ENABLE_FEATURE_VI_YANKMARK
{
int i;
for (i = 0; i < ARRAY_SIZE(mark); i++)
if (mark[i])
mark[i] += bias;
}
#endif
text = new_text;
}
memmove(p + size, p, end - size - p);
memset(p, ' ', size); // clear new hole
return bias;
}
// close a hole in text[] - delete "p" through "q", inclusive
// "undo" value indicates if this operation should be undo-able
#if !ENABLE_FEATURE_VI_UNDO
#define text_hole_delete(a,b,c) text_hole_delete(a,b)
#endif
static char *text_hole_delete(char *p, char *q, int undo)
{
char *src, *dest;
int cnt, hole_size;
// move forwards, from beginning
// assume p <= q
src = q + 1;
dest = p;
if (q < p) { // they are backward- swap them
src = p + 1;
dest = q;
}
hole_size = q - p + 1;
cnt = end - src;
#if ENABLE_FEATURE_VI_UNDO
switch (undo) {
case NO_UNDO:
break;
case ALLOW_UNDO:
undo_push(p, hole_size, UNDO_DEL);
break;
case ALLOW_UNDO_CHAIN:
undo_push(p, hole_size, UNDO_DEL_CHAIN);
break;
# if ENABLE_FEATURE_VI_UNDO_QUEUE
case ALLOW_UNDO_QUEUED:
undo_push(p, hole_size, UNDO_DEL_QUEUED);
break;
# endif
}
modified_count--;
#endif
if (src < text || src > end)
goto thd0;
if (dest < text || dest >= end)
goto thd0;
modified_count++;
if (src >= end)
goto thd_atend; // just delete the end of the buffer
memmove(dest, src, cnt);
thd_atend:
end = end - hole_size; // adjust the new END
if (dest >= end)
dest = end - 1; // make sure dest in below end-1
if (end <= text)
dest = end = text; // keep pointers valid
thd0:
return dest;
}
#if ENABLE_FEATURE_VI_UNDO
# if ENABLE_FEATURE_VI_UNDO_QUEUE
// Flush any queued objects to the undo stack
static void undo_queue_commit(void)
{
// Pushes the queue object onto the undo stack
if (undo_q > 0) {
// Deleted character undo events grow from the end
undo_push(undo_queue + CONFIG_FEATURE_VI_UNDO_QUEUE_MAX - undo_q,
undo_q,
(undo_queue_state | UNDO_USE_SPOS)
);
undo_queue_state = UNDO_EMPTY;
undo_q = 0;
}
}
# else
# define undo_queue_commit() ((void)0)
# endif
static void flush_undo_data(void)
{
struct undo_object *undo_entry;
while (undo_stack_tail) {
undo_entry = undo_stack_tail;
undo_stack_tail = undo_entry->prev;
free(undo_entry);
}
}
// Undo functions and hooks added by Jody Bruchon (jody@jodybruchon.com)
// Add to the undo stack
static void undo_push(char *src, unsigned length, int u_type)
{
struct undo_object *undo_entry;
# if ENABLE_FEATURE_VI_UNDO_QUEUE
int use_spos = u_type & UNDO_USE_SPOS;
# endif
// "u_type" values
// UNDO_INS: insertion, undo will remove from buffer
// UNDO_DEL: deleted text, undo will restore to buffer
// UNDO_{INS,DEL}_CHAIN: Same as above but also calls undo_pop() when complete
// The CHAIN operations are for handling multiple operations that the user
// performs with a single action, i.e. REPLACE mode or find-and-replace commands
// UNDO_{INS,DEL}_QUEUED: If queuing feature is enabled, allow use of the queue
// for the INS/DEL operation.
// UNDO_{INS,DEL} ORed with UNDO_USE_SPOS: commit the undo queue
# if ENABLE_FEATURE_VI_UNDO_QUEUE
// This undo queuing functionality groups multiple character typing or backspaces
// into a single large undo object. This greatly reduces calls to malloc() for
// single-character operations while typing and has the side benefit of letting
// an undo operation remove chunks of text rather than a single character.
switch (u_type) {
case UNDO_EMPTY: // Just in case this ever happens...
return;
case UNDO_DEL_QUEUED:
if (length != 1)
return; // Only queue single characters
switch (undo_queue_state) {
case UNDO_EMPTY:
undo_queue_state = UNDO_DEL;
case UNDO_DEL:
undo_queue_spos = src;
undo_q++;
undo_queue[CONFIG_FEATURE_VI_UNDO_QUEUE_MAX - undo_q] = *src;
// If queue is full, dump it into an object
if (undo_q == CONFIG_FEATURE_VI_UNDO_QUEUE_MAX)
undo_queue_commit();
return;
case UNDO_INS:
// Switch from storing inserted text to deleted text
undo_queue_commit();
undo_push(src, length, UNDO_DEL_QUEUED);
return;
}
break;
case UNDO_INS_QUEUED:
if (length < 1)
return;
switch (undo_queue_state) {
case UNDO_EMPTY:
undo_queue_state = UNDO_INS;
undo_queue_spos = src;
case UNDO_INS:
while (length--) {
undo_q++; // Don't need to save any data for insertions
if (undo_q == CONFIG_FEATURE_VI_UNDO_QUEUE_MAX)
undo_queue_commit();
}
return;
case UNDO_DEL:
// Switch from storing deleted text to inserted text
undo_queue_commit();
undo_push(src, length, UNDO_INS_QUEUED);
return;
}
break;
}
u_type &= ~UNDO_USE_SPOS;
# endif
// Allocate a new undo object
if (u_type == UNDO_DEL || u_type == UNDO_DEL_CHAIN) {
// For UNDO_DEL objects, save deleted text
if ((text + length) == end)
length--;
// If this deletion empties text[], strip the newline. When the buffer becomes
// zero-length, a newline is added back, which requires this to compensate.
undo_entry = xzalloc(offsetof(struct undo_object, undo_text) + length);
memcpy(undo_entry->undo_text, src, length);
} else {
undo_entry = xzalloc(sizeof(*undo_entry));
}
undo_entry->length = length;
# if ENABLE_FEATURE_VI_UNDO_QUEUE
if (use_spos) {
undo_entry->start = undo_queue_spos - text; // use start position from queue
} else {
undo_entry->start = src - text; // use offset from start of text buffer
}
# else
undo_entry->start = src - text;
# endif
undo_entry->u_type = u_type;
// Push it on undo stack
undo_entry->prev = undo_stack_tail;
undo_stack_tail = undo_entry;
modified_count++;
}
static void undo_push_insert(char *p, int len, int undo)
{
switch (undo) {
case ALLOW_UNDO:
undo_push(p, len, UNDO_INS);
break;
case ALLOW_UNDO_CHAIN:
undo_push(p, len, UNDO_INS_CHAIN);
break;
# if ENABLE_FEATURE_VI_UNDO_QUEUE
case ALLOW_UNDO_QUEUED:
undo_push(p, len, UNDO_INS_QUEUED);
break;
# endif
}
}
// Undo the last operation
static void undo_pop(void)
{
int repeat;
char *u_start, *u_end;
struct undo_object *undo_entry;
// Commit pending undo queue before popping (should be unnecessary)
undo_queue_commit();
undo_entry = undo_stack_tail;
// Check for an empty undo stack
if (!undo_entry) {
status_line("Already at oldest change");
return;
}
switch (undo_entry->u_type) {
case UNDO_DEL:
case UNDO_DEL_CHAIN:
// make hole and put in text that was deleted; deallocate text
u_start = text + undo_entry->start;
text_hole_make(u_start, undo_entry->length);
memcpy(u_start, undo_entry->undo_text, undo_entry->length);
# if ENABLE_FEATURE_VI_VERBOSE_STATUS
status_line("Undo [%d] %s %d chars at position %d",
modified_count, "restored",
undo_entry->length, undo_entry->start
);
# endif
break;
case UNDO_INS:
case UNDO_INS_CHAIN:
// delete what was inserted
u_start = undo_entry->start + text;
u_end = u_start - 1 + undo_entry->length;
text_hole_delete(u_start, u_end, NO_UNDO);
# if ENABLE_FEATURE_VI_VERBOSE_STATUS
status_line("Undo [%d] %s %d chars at position %d",
modified_count, "deleted",
undo_entry->length, undo_entry->start
);
# endif
break;
}
repeat = 0;
switch (undo_entry->u_type) {
// If this is the end of a chain, lower modification count and refresh display
case UNDO_DEL:
case UNDO_INS:
dot = (text + undo_entry->start);
refresh(FALSE);
break;
case UNDO_DEL_CHAIN:
case UNDO_INS_CHAIN:
repeat = 1;
break;
}
// Deallocate the undo object we just processed
undo_stack_tail = undo_entry->prev;
free(undo_entry);
modified_count--;
// For chained operations, continue popping all the way down the chain.
if (repeat) {
undo_pop(); // Follow the undo chain if one exists
}
}
#else
# define flush_undo_data() ((void)0)
# define undo_queue_commit() ((void)0)
#endif /* ENABLE_FEATURE_VI_UNDO */
//----- Dot Movement Routines ----------------------------------
static void dot_left(void)
{
undo_queue_commit();
if (dot > text && dot[-1] != '\n')
dot--;
}
static void dot_right(void)
{
undo_queue_commit();
if (dot < end - 1 && *dot != '\n')
dot++;
}
static void dot_begin(void)
{
undo_queue_commit();
dot = begin_line(dot); // return pointer to first char cur line
}
static void dot_end(void)
{
undo_queue_commit();
dot = end_line(dot); // return pointer to last char cur line
}
static char *move_to_col(char *p, int l)
{
int co;
p = begin_line(p);
co = 0;
do {
if (*p == '\n') //vda || *p == '\0')
break;
co = next_column(*p, co);
} while (co <= l && p++ < end);
return p;
}
static void dot_next(void)
{
undo_queue_commit();
dot = next_line(dot);
}
static void dot_prev(void)
{
undo_queue_commit();
dot = prev_line(dot);
}
static void dot_skip_over_ws(void)
{
// skip WS
while (isspace(*dot) && *dot != '\n' && dot < end - 1)
dot++;
}
static void dot_to_char(int cmd)
{
char *q = dot;
int dir = islower(cmd) ? FORWARD : BACK;
if (last_search_char == 0)
return;
do {
do {
q += dir;
if ((dir == FORWARD ? q > end - 1 : q < text) || *q == '\n') {
indicate_error();
return;
}
} while (*q != last_search_char);
} while (--cmdcnt > 0);
dot = q;
// place cursor before/after char as required
if (cmd == 't')
dot_left();
else if (cmd == 'T')
dot_right();
}
static void dot_scroll(int cnt, int dir)
{
char *q;
undo_queue_commit();
for (; cnt > 0; cnt--) {
if (dir < 0) {
// scroll Backwards
// ctrl-Y scroll up one line
screenbegin = prev_line(screenbegin);
} else {
// scroll Forwards
// ctrl-E scroll down one line
screenbegin = next_line(screenbegin);
}
}
// make sure "dot" stays on the screen so we dont scroll off
if (dot < screenbegin)
dot = screenbegin;
q = end_screen(); // find new bottom line
if (dot > q)
dot = begin_line(q); // is dot is below bottom line?
dot_skip_over_ws();
}
static char *bound_dot(char *p) // make sure text[0] <= P < "end"
{
if (p >= end && end > text) {
p = end - 1;
indicate_error();
}
if (p < text) {
p = text;
indicate_error();
}
return p;
}
#if ENABLE_FEATURE_VI_DOT_CMD
static void start_new_cmd_q(char c)
{
// get buffer for new cmd
dotcnt = cmdcnt ?: 1;
last_modifying_cmd[0] = c;
lmc_len = 1;
adding2q = 1;
}
static void end_cmd_q(void)
{
# if ENABLE_FEATURE_VI_YANKMARK
YDreg = 26; // go back to default Yank/Delete reg
# endif
adding2q = 0;
}
#else
# define end_cmd_q() ((void)0)
#endif /* FEATURE_VI_DOT_CMD */
// copy text into register, then delete text.
//
#if !ENABLE_FEATURE_VI_UNDO
#define yank_delete(a,b,c,d,e) yank_delete(a,b,c,d)
#endif
static char *yank_delete(char *start, char *stop, int buftype, int yf, int undo)
{
char *p;
// make sure start <= stop
if (start > stop) {
// they are backwards, reverse them
p = start;
start = stop;
stop = p;
}
if (buftype == PARTIAL && *start == '\n')
return start;
p = start;
#if ENABLE_FEATURE_VI_YANKMARK
text_yank(start, stop, YDreg, buftype);
#endif
if (yf == YANKDEL) {
p = text_hole_delete(start, stop, undo);
} // delete lines
return p;
}
// might reallocate text[]!
static int file_insert(const char *fn, char *p, int initial)
{
int cnt = -1;
int fd, size;
struct stat statbuf;
if (p < text)
p = text;
if (p > end)
p = end;
fd = open(fn, O_RDONLY);
if (fd < 0) {
if (!initial)
status_line_bold_errno(fn);
return cnt;
}
// Validate file
if (fstat(fd, &statbuf) < 0) {
status_line_bold_errno(fn);
goto fi;
}
if (!S_ISREG(statbuf.st_mode)) {
status_line_bold("'%s' is not a regular file", fn);
goto fi;
}
size = (statbuf.st_size < INT_MAX ? (int)statbuf.st_size : INT_MAX);
p += text_hole_make(p, size);
cnt = full_read(fd, p, size);
if (cnt < 0) {
status_line_bold_errno(fn);
p = text_hole_delete(p, p + size - 1, NO_UNDO); // un-do buffer insert
} else if (cnt < size) {
// There was a partial read, shrink unused space
p = text_hole_delete(p + cnt, p + size - 1, NO_UNDO);
status_line_bold("can't read '%s'", fn);
}
# if ENABLE_FEATURE_VI_UNDO
else {
undo_push_insert(p, size, ALLOW_UNDO);
}
# endif
fi:
close(fd);
#if ENABLE_FEATURE_VI_READONLY
if (initial
&& ((access(fn, W_OK) < 0) ||
// root will always have access()
// so we check fileperms too
!(statbuf.st_mode & (S_IWUSR | S_IWGRP | S_IWOTH))
)
) {
SET_READONLY_FILE(readonly_mode);
}
#endif
return cnt;
}
// find matching char of pair () [] {}
// will crash if c is not one of these
static char *find_pair(char *p, const char c)
{
const char *braces = "()[]{}";
char match;
int dir, level;
dir = strchr(braces, c) - braces;
dir ^= 1;
match = braces[dir];
dir = ((dir & 1) << 1) - 1; // 1 for ([{, -1 for )\}
// look for match, count levels of pairs (( ))
level = 1;
for (;;) {
p += dir;
if (p < text || p >= end)
return NULL;
if (*p == c)
level++; // increase pair levels
if (*p == match) {
level--; // reduce pair level
if (level == 0)
return p; // found matching pair
}
}
}
#if ENABLE_FEATURE_VI_SETOPTS
// show the matching char of a pair, () [] {}
static void showmatching(char *p)
{
char *q, *save_dot;
// we found half of a pair
q = find_pair(p, *p); // get loc of matching char
if (q == NULL) {
indicate_error(); // no matching char
} else {
// "q" now points to matching pair
save_dot = dot; // remember where we are
dot = q; // go to new loc
refresh(FALSE); // let the user see it
mysleep(40); // give user some time
dot = save_dot; // go back to old loc
refresh(FALSE);
}
}
#endif /* FEATURE_VI_SETOPTS */
// might reallocate text[]! use p += stupid_insert(p, ...),
// and be careful to not use pointers into potentially freed text[]!
static uintptr_t stupid_insert(char *p, char c) // stupidly insert the char c at 'p'
{
uintptr_t bias;
bias = text_hole_make(p, 1);
p += bias;
*p = c;
return bias;
}
// find number of characters in indent, p must be at beginning of line
static size_t indent_len(char *p)
{
char *r = p;
while (r < (end - 1) && isblank(*r))
r++;
return r - p;
}
#if !ENABLE_FEATURE_VI_UNDO
#define char_insert(a,b,c) char_insert(a,b)
#endif
static char *char_insert(char *p, char c, int undo) // insert the char c at 'p'
{
#if ENABLE_FEATURE_VI_SETOPTS
size_t len;
int col, ntab, nspc;
#endif
char *bol = begin_line(p);
if (c == 22) { // Is this an ctrl-V?
p += stupid_insert(p, '^'); // use ^ to indicate literal next
refresh(FALSE); // show the ^
c = get_one_char();
*p = c;
#if ENABLE_FEATURE_VI_UNDO
undo_push_insert(p, 1, undo);
#else
modified_count++;
#endif
p++;
} else if (c == 27) { // Is this an ESC?
cmd_mode = 0;
undo_queue_commit();
cmdcnt = 0;
end_cmd_q(); // stop adding to q
last_status_cksum = 0; // force status update
if ((dot > text) && (p[-1] != '\n')) {
p--;
}
#if ENABLE_FEATURE_VI_SETOPTS
if (autoindent) {
len = indent_len(bol);
if (len && get_column(bol + len) == indentcol && bol[len] == '\n') {
// remove autoindent from otherwise empty line
text_hole_delete(bol, bol + len - 1, undo);
p = bol;
}
}
#endif
} else if (c == 4) { // ctrl-D reduces indentation
char *r = bol + indent_len(bol);
int prev = prev_tabstop(get_column(r));
while (r > bol && get_column(r) > prev) {
if (p > bol)
p--;
r--;
r = text_hole_delete(r, r, ALLOW_UNDO_QUEUED);
}
#if ENABLE_FEATURE_VI_SETOPTS
if (autoindent && indentcol && r == end_line(p)) {
// record changed size of autoindent
indentcol = get_column(p);
return p;
}
#endif
#if ENABLE_FEATURE_VI_SETOPTS
} else if (c == '\t' && expandtab) { // expand tab
col = get_column(p);
col = next_tabstop(col) - col + 1;
while (col--) {
# if ENABLE_FEATURE_VI_UNDO
undo_push_insert(p, 1, undo);
# else
modified_count++;
# endif
p += 1 + stupid_insert(p, ' ');
}
#endif
} else if (c == term_orig.c_cc[VERASE] || c == 8 || c == 127) { // Is this a BS
if (p > text) {
p--;
p = text_hole_delete(p, p, ALLOW_UNDO_QUEUED); // shrink buffer 1 char
}
} else {
// insert a char into text[]
if (c == 13)
c = '\n'; // translate \r to \n
#if ENABLE_FEATURE_VI_UNDO
# if ENABLE_FEATURE_VI_UNDO_QUEUE
if (c == '\n')
undo_queue_commit();
# endif
undo_push_insert(p, 1, undo);
#else
modified_count++;
#endif
p += 1 + stupid_insert(p, c); // insert the char
#if ENABLE_FEATURE_VI_SETOPTS
if (showmatch && strchr(")]}", c) != NULL) {
showmatching(p - 1);
}
if (autoindent && c == '\n') { // auto indent the new line
// use indent of current/previous line
bol = indentcol < 0 ? p : prev_line(p);
len = indent_len(bol);
col = get_column(bol + len);
if (len && col == indentcol) {
// previous line was empty except for autoindent
// move the indent to the current line
memmove(bol + 1, bol, len);
*bol = '\n';
return p;
}
if (indentcol < 0)
p--; // open above, indent before newly inserted NL
if (len) {
indentcol = col;
if (expandtab) {
ntab = 0;
nspc = col;
} else {
ntab = col / tabstop;
nspc = col % tabstop;
}
p += text_hole_make(p, ntab + nspc);
# if ENABLE_FEATURE_VI_UNDO
undo_push_insert(p, ntab + nspc, undo);
# endif
memset(p, '\t', ntab);
p += ntab;
memset(p, ' ', nspc);
return p + nspc;
}
}
#endif
}
#if ENABLE_FEATURE_VI_SETOPTS
indentcol = 0;
#endif
return p;
}
#if ENABLE_FEATURE_VI_COLON_EXPAND
static void init_filename(char *fn)
{
char *copy = xstrdup(fn);
if (current_filename == NULL) {
current_filename = copy;
} else {
free(alt_filename);
alt_filename = copy;
}
}
#else
# define init_filename(f) ((void)(0))
#endif
static void update_filename(char *fn)
{
#if ENABLE_FEATURE_VI_COLON_EXPAND
if (fn == NULL)
return;
if (current_filename == NULL || strcmp(fn, current_filename) != 0) {
free(alt_filename);
alt_filename = current_filename;
current_filename = xstrdup(fn);
}
#else
if (fn != current_filename) {
free(current_filename);
current_filename = xstrdup(fn);
}
#endif
}
// read text from file or create an empty buf
// will also update current_filename
static int init_text_buffer(char *fn)
{
int rc;
// allocate/reallocate text buffer
free(text);
text_size = 10240;
screenbegin = dot = end = text = xzalloc(text_size);
update_filename(fn);
rc = file_insert(fn, text, 1);
if (rc < 0) {
// file doesnt exist. Start empty buf with dummy line
char_insert(text, '\n', NO_UNDO);
}
flush_undo_data();
modified_count = 0;
last_modified_count = -1;
#if ENABLE_FEATURE_VI_YANKMARK
// init the marks
memset(mark, 0, sizeof(mark));
#endif
return rc;
}
#if ENABLE_FEATURE_VI_YANKMARK \
|| (ENABLE_FEATURE_VI_COLON && ENABLE_FEATURE_VI_SEARCH) \
|| ENABLE_FEATURE_VI_CRASHME
// might reallocate text[]! use p += string_insert(p, ...),
// and be careful to not use pointers into potentially freed text[]!
# if !ENABLE_FEATURE_VI_UNDO
# define string_insert(a,b,c) string_insert(a,b)
# endif
static uintptr_t string_insert(char *p, const char *s, int undo) // insert the string at 'p'
{
uintptr_t bias;
int i;
i = strlen(s);
#if ENABLE_FEATURE_VI_UNDO
undo_push_insert(p, i, undo);
#endif
bias = text_hole_make(p, i);
p += bias;
memcpy(p, s, i);
return bias;
}
#endif
static int file_write(char *fn, char *first, char *last)
{
int fd, cnt, charcnt;
if (fn == 0) {
status_line_bold("No current filename");
return -2;
}
// By popular request we do not open file with O_TRUNC,
// but instead ftruncate() it _after_ successful write.
// Might reduce amount of data lost on power fail etc.
fd = open(fn, (O_WRONLY | O_CREAT), 0666);
if (fd < 0)
return -1;
cnt = last - first + 1;
charcnt = full_write(fd, first, cnt);
ftruncate(fd, charcnt);
if (charcnt == cnt) {
// good write
//modified_count = FALSE;
} else {
charcnt = 0;
}
close(fd);
return charcnt;
}
#if ENABLE_FEATURE_VI_SEARCH
# if ENABLE_FEATURE_VI_REGEX_SEARCH
// search for pattern starting at p
static char *char_search(char *p, const char *pat, int dir_and_range)
{
struct re_pattern_buffer preg;
const char *err;
char *q;
int i, size, range, start;
re_syntax_options = RE_SYNTAX_POSIX_BASIC & (~RE_DOT_NEWLINE);
if (ignorecase)
re_syntax_options |= RE_ICASE;
memset(&preg, 0, sizeof(preg));
err = re_compile_pattern(pat, strlen(pat), &preg);
preg.not_bol = p != text;
preg.not_eol = p != end - 1;
if (err != NULL) {
status_line_bold("bad search pattern '%s': %s", pat, err);
return p;
}
range = (dir_and_range & 1);
q = end - 1; // if FULL
if (range == LIMITED)
q = next_line(p);
if (dir_and_range < 0) { // BACK?
q = text;
if (range == LIMITED)
q = prev_line(p);
}
// RANGE could be negative if we are searching backwards
range = q - p;
if (range < 0) {
size = -range;
start = size;
} else {
size = range;
start = 0;
}
q = p - start;
if (q < text)
q = text;
// search for the compiled pattern, preg, in p[]
// range < 0, start == size: search backward
// range > 0, start == 0: search forward
// re_search() < 0: not found or error
// re_search() >= 0: index of found pattern
// struct pattern char int int int struct reg
// re_search(*pattern_buffer, *string, size, start, range, *regs)
i = re_search(&preg, q, size, start, range, /*struct re_registers*:*/ NULL);
regfree(&preg);
return i < 0 ? NULL : q + i;
}
# else
# if ENABLE_FEATURE_VI_SETOPTS
static int mycmp(const char *s1, const char *s2, int len)
{
if (ignorecase) {
return strncasecmp(s1, s2, len);
}
return strncmp(s1, s2, len);
}
# else
# define mycmp strncmp
# endif
static char *char_search(char *p, const char *pat, int dir_and_range)
{
char *start, *stop;
int len;
int range;
len = strlen(pat);
range = (dir_and_range & 1);
if (dir_and_range > 0) { //FORWARD?
stop = end - 1; // assume range is p..end-1
if (range == LIMITED)
stop = next_line(p); // range is to next line
for (start = p; start < stop; start++) {
if (mycmp(start, pat, len) == 0) {
return start;
}
}
} else { //BACK
stop = text; // assume range is text..p
if (range == LIMITED)
stop = prev_line(p); // range is to prev line
for (start = p - len; start >= stop; start--) {
if (mycmp(start, pat, len) == 0) {
return start;
}
}
}
// pattern not found
return NULL;
}
# endif
#endif /* FEATURE_VI_SEARCH */
//----- The Colon commands -------------------------------------
#if ENABLE_FEATURE_VI_COLON
// Evaluate colon address expression. Returns a pointer to the
// next character or NULL on error. If 'result' contains a valid
// address 'valid' is TRUE.
static char *get_one_address(char *p, int *result, int *valid)
{
int num, sign, addr, got_addr;
# if ENABLE_FEATURE_VI_YANKMARK || ENABLE_FEATURE_VI_SEARCH
char *q, c;
# endif
IF_FEATURE_VI_SEARCH(int dir;)
got_addr = FALSE;
addr = count_lines(text, dot); // default to current line
sign = 0;
for (;;) {
if (isblank(*p)) {
if (got_addr) {
addr += sign;
sign = 0;
}
p++;
} else if (!got_addr && *p == '.') { // the current line
p++;
//addr = count_lines(text, dot);
got_addr = TRUE;
} else if (!got_addr && *p == '$') { // the last line in file
p++;
addr = count_lines(text, end - 1);
got_addr = TRUE;
}
# if ENABLE_FEATURE_VI_YANKMARK
else if (!got_addr && *p == '\'') { // is this a mark addr
p++;
c = tolower(*p);
p++;
q = NULL;
if (c >= 'a' && c <= 'z') {
// we have a mark
c = c - 'a';
q = mark[(unsigned char) c];
}
if (q == NULL) { // is mark valid
status_line_bold("Mark not set");
return NULL;
}
addr = count_lines(text, q);
got_addr = TRUE;
}
# endif
# if ENABLE_FEATURE_VI_SEARCH
else if (!got_addr && (*p == '/' || *p == '?')) { // a search pattern
c = *p;
q = strchrnul(p + 1, c);
if (p + 1 != q) {
// save copy of new pattern
free(last_search_pattern);
last_search_pattern = xstrndup(p, q - p);
}
p = q;
if (*p == c)
p++;
if (c == '/') {
q = next_line(dot);
dir = (FORWARD << 1) | FULL;
} else {
q = begin_line(dot);
dir = ((unsigned)BACK << 1) | FULL;
}
q = char_search(q, last_search_pattern + 1, dir);
if (q == NULL) {
// no match, continue from other end of file
q = char_search(dir > 0 ? text : end - 1,
last_search_pattern + 1, dir);
if (q == NULL) {
status_line_bold("Pattern not found");
return NULL;
}
}
addr = count_lines(text, q);
got_addr = TRUE;
}
# endif
else if (isdigit(*p)) {
num = 0;
while (isdigit(*p))
num = num * 10 + *p++ -'0';
if (!got_addr) { // specific line number
addr = num;
got_addr = TRUE;
} else { // offset from current addr
addr += sign >= 0 ? num : -num;
}
sign = 0;
} else if (*p == '-' || *p == '+') {
if (!got_addr) { // default address is dot
//addr = count_lines(text, dot);
got_addr = TRUE;
} else {
addr += sign;
}
sign = *p++ == '-' ? -1 : 1;
} else {
addr += sign; // consume unused trailing sign
break;
}
}
*result = addr;
*valid = got_addr;
return p;
}
# define GET_ADDRESS 0
# define GET_SEPARATOR 1
// Read line addresses for a colon command. The user can enter as
// many as they like but only the last two will be used.
static char *get_address(char *p, int *b, int *e, unsigned int *got)
{
int state = GET_ADDRESS;
int valid;
int addr;
char *save_dot = dot;
//----- get the address' i.e., 1,3 'a,'b -----
for (;;) {
if (isblank(*p)) {
p++;
} else if (state == GET_ADDRESS && *p == '%') { // alias for 1,$
p++;
*b = 1;
*e = count_lines(text, end-1);
*got = 3;
state = GET_SEPARATOR;
} else if (state == GET_ADDRESS) {
valid = FALSE;
p = get_one_address(p, &addr, &valid);
// Quit on error or if the address is invalid and isn't of
// the form ',$' or '1,' (in which case it defaults to dot).
if (p == NULL || !(valid || *p == ',' || *p == ';' || *got & 1))
break;
*b = *e;
*e = addr;
*got = (*got << 1) | 1;
state = GET_SEPARATOR;
} else if (state == GET_SEPARATOR && (*p == ',' || *p == ';')) {
if (*p == ';')
dot = find_line(*e);
p++;
state = GET_ADDRESS;
} else {
break;
}
}
dot = save_dot;
return p;
}
# if ENABLE_FEATURE_VI_SET && ENABLE_FEATURE_VI_SETOPTS
static void setops(char *args, int flg_no)
{
char *eq;
int index;
eq = strchr(args, '=');
if (eq) *eq = '\0';
index = index_in_strings(OPTS_STR, args + flg_no);
if (eq) *eq = '=';
if (index < 0) {
bad:
status_line_bold("bad option: %s", args);
return;
}
index = 1 << (index >> 1); // convert to VI_bit
if (index & VI_TABSTOP) {
int t;
if (!eq || flg_no) // no "=NNN" or it is "notabstop"?
goto bad;
t = bb_strtou(eq + 1, NULL, 10);
if (t <= 0 || t > MAX_TABSTOP)
goto bad;
tabstop = t;
return;
}
if (eq) goto bad; // boolean option has "="?
if (flg_no) {
vi_setops &= ~index;
} else {
vi_setops |= index;
}
}
# endif
# if ENABLE_FEATURE_VI_COLON_EXPAND
static char *expand_args(char *args)
{
char *s, *t;
const char *replace;
args = xstrdup(args);
for (s = args; *s; s++) {
if (*s == '%') {
replace = current_filename;
} else if (*s == '#') {
replace = alt_filename;
} else {
if (*s == '\\' && s[1] != '\0') {
for (t = s++; *t; t++)
*t = t[1];
}
continue;
}
if (replace == NULL) {
free(args);
status_line_bold("No previous filename");
return NULL;
}
*s = '\0';
t = xasprintf("%s%s%s", args, replace, s+1);
s = t + (s - args) + strlen(replace);
free(args);
args = t;
}
return args;
}
# else
# define expand_args(a) (a)
# endif
#endif /* FEATURE_VI_COLON */
#if ENABLE_FEATURE_VI_REGEX_SEARCH
# define MAX_SUBPATTERN 10 // subpatterns \0 .. \9
// Like strchr() but skipping backslash-escaped characters
static char *strchr_backslash(const char *s, int c)
{
while (*s) {
if (*s == c)
return (char *)s;
if (*s == '\\')
if (*++s == '\0')
break;
s++;
}
return NULL;
}
// If the return value is not NULL the caller should free R
static char *regex_search(char *q, regex_t *preg, const char *Rorig,
size_t *len_F, size_t *len_R, char **R)
{
regmatch_t regmatch[MAX_SUBPATTERN], *cur_match;
char *found = NULL;
const char *t;
char *r;
regmatch[0].rm_so = 0;
regmatch[0].rm_eo = end_line(q) - q;
if (regexec(preg, q, MAX_SUBPATTERN, regmatch, REG_STARTEND) != 0)
return found;
found = q + regmatch[0].rm_so;
*len_F = regmatch[0].rm_eo - regmatch[0].rm_so;
*R = NULL;
fill_result:
// first pass calculates len_R, second fills R
*len_R = 0;
for (t = Rorig, r = *R; *t; t++) {
size_t len = 1; // default is to copy one char from replace pattern
const char *from = t;
if (*t == '\\') {
from = ++t; // skip backslash
if (*t >= '0' && *t < '0' + MAX_SUBPATTERN) {
cur_match = regmatch + (*t - '0');
if (cur_match->rm_so >= 0) {
len = cur_match->rm_eo - cur_match->rm_so;
from = q + cur_match->rm_so;
}
}
}
*len_R += len;
if (*R) {
memcpy(r, from, len);
r += len;
/* *r = '\0'; - xzalloc did it */
}
}
if (*R == NULL) {
*R = xzalloc(*len_R + 1);
goto fill_result;
}
return found;
}
#else /* !ENABLE_FEATURE_VI_REGEX_SEARCH */
# define strchr_backslash(s, c) strchr(s, c)
#endif /* ENABLE_FEATURE_VI_REGEX_SEARCH */
// buf must be no longer than MAX_INPUT_LEN!
static void colon(char *buf)
{
#if !ENABLE_FEATURE_VI_COLON
// Simple ":cmd" handler with minimal set of commands
char *p = buf;
int cnt;
if (*p == ':')
p++;
cnt = strlen(p);
if (cnt == 0)
return;
if (strncmp(p, "quit", cnt) == 0
|| strcmp(p, "q!") == 0
) {
if (modified_count && p[1] != '!') {
status_line_bold("No write since last change (:%s! overrides)", p);
} else {
editing = 0;
}
return;
}
if (strncmp(p, "write", cnt) == 0
|| strcmp(p, "wq") == 0
|| strcmp(p, "wn") == 0
|| (p[0] == 'x' && !p[1])
) {
if (modified_count != 0 || p[0] != 'x') {
cnt = file_write(current_filename, text, end - 1);
}
if (cnt < 0) {
if (cnt == -1)
status_line_bold("Write error: "STRERROR_FMT STRERROR_ERRNO);
} else {
modified_count = 0;
last_modified_count = -1;
status_line("'%s' %uL, %uC",
current_filename,
count_lines(text, end - 1), cnt
);
if (p[0] == 'x'
|| p[1] == 'q' || p[1] == 'n'
) {
editing = 0;
}
}
return;
}
if (strncmp(p, "file", cnt) == 0) {
last_status_cksum = 0; // force status update
return;
}
if (sscanf(p, "%d", &cnt) > 0) {
dot = find_line(cnt);
dot_skip_over_ws();
return;
}
not_implemented(p);
#else
// check how many addresses we got
# define GOT_ADDRESS (got & 1)
# define GOT_RANGE ((got & 3) == 3)
char c, *buf1, *q, *r;
char *fn, cmd[MAX_INPUT_LEN], *cmdend, *args, *exp = NULL;
int i, l, li, b, e;
unsigned int got;
int useforce;
// :3154 // if (-e line 3154) goto it else stay put
// :4,33w! foo // write a portion of buffer to file "foo"
// :w // write all of buffer to current file
// :q // quit
// :q! // quit- dont care about modified file
// :'a,'z!sort -u // filter block through sort
// :'f // goto mark "f"
// :'fl // list literal the mark "f" line
// :.r bar // read file "bar" into buffer before dot
// :/123/,/abc/d // delete lines from "123" line to "abc" line
// :/xyz/ // goto the "xyz" line
// :s/find/replace/ // substitute pattern "find" with "replace"
// :!<cmd> // run <cmd> then return
//
while (*buf == ':')
buf++; // move past leading colons
while (isblank(*buf))
buf++; // move past leading blanks
if (!buf[0] || buf[0] == '"')
goto ret; // ignore empty lines or those starting with '"'
li = i = 0;
b = e = -1;
got = 0;
li = count_lines(text, end - 1);
fn = current_filename;
// look for optional address(es) :. :1 :1,9 :'q,'a :%
buf = get_address(buf, &b, &e, &got);
if (buf == NULL) {
goto ret;
}
// get the COMMAND into cmd[]
strcpy(cmd, buf);
buf1 = cmd;
while (!isspace(*buf1) && *buf1 != '\0') {
buf1++;
}
cmdend = buf1;
// get any ARGuments
while (isblank(*buf1))
buf1++;
args = buf1;
*cmdend = '\0';
useforce = FALSE;
if (cmdend > cmd && cmdend[-1] == '!') {
useforce = TRUE;
cmdend[-1] = '\0'; // get rid of !
}
// assume the command will want a range, certain commands
// (read, substitute) need to adjust these assumptions
if (!GOT_ADDRESS) {
q = text; // no addr, use 1,$ for the range
r = end - 1;
} else {
// at least one addr was given, get its details
if (e < 0 || e > li) {
status_line_bold("Invalid range");
goto ret;
}
q = r = find_line(e);
if (!GOT_RANGE) {
// if there is only one addr, then it's the line
// number of the single line the user wants.
// Reset the end pointer to the end of that line.
r = end_line(q);
li = 1;
} else {
// we were given two addrs. change the
// start pointer to the addr given by user.
if (b < 0 || b > li || b > e) {
status_line_bold("Invalid range");
goto ret;
}
q = find_line(b); // what line is #b
r = end_line(r);
li = e - b + 1;
}
}
// ------------ now look for the command ------------
i = strlen(cmd);
if (i == 0) { // :123CR goto line #123
if (e >= 0) {
dot = find_line(e); // what line is #e
dot_skip_over_ws();
}
}
# if ENABLE_FEATURE_ALLOW_EXEC
else if (cmd[0] == '!') { // run a cmd
int retcode;
// :!ls run the <cmd>
exp = expand_args(buf + 1);
if (exp == NULL)
goto ret;
go_bottom_and_clear_to_eol();
cookmode();
retcode = system(exp); // run the cmd
if (retcode)
printf("\nshell returned %i\n\n", retcode);
rawmode();
Hit_Return(); // let user see results
}
# endif
else if (cmd[0] == '=' && !cmd[1]) { // where is the address
if (!GOT_ADDRESS) { // no addr given- use defaults
e = count_lines(text, dot);
}
status_line("%d", e);
} else if (strncmp(cmd, "delete", i) == 0) { // delete lines
if (!GOT_ADDRESS) { // no addr given- use defaults
q = begin_line(dot); // assume .,. for the range
r = end_line(dot);
}
dot = yank_delete(q, r, WHOLE, YANKDEL, ALLOW_UNDO); // save, then delete lines
dot_skip_over_ws();
} else if (strncmp(cmd, "edit", i) == 0) { // Edit a file
int size;
// don't edit, if the current file has been modified
if (modified_count && !useforce) {
status_line_bold("No write since last change (:%s! overrides)", cmd);
goto ret;
}
if (args[0]) {
// the user supplied a file name
fn = exp = expand_args(args);
if (exp == NULL)
goto ret;
} else if (current_filename == NULL) {
// no user file name, no current name- punt
status_line_bold("No current filename");
goto ret;
}
size = init_text_buffer(fn);
# if ENABLE_FEATURE_VI_YANKMARK
if (Ureg >= 0 && Ureg < 28) {
free(reg[Ureg]); // free orig line reg- for 'U'
reg[Ureg] = NULL;
}
/*if (YDreg < 28) - always true*/ {
free(reg[YDreg]); // free default yank/delete register
reg[YDreg] = NULL;
}
# endif
// how many lines in text[]?
li = count_lines(text, end - 1);
status_line("'%s'%s"
IF_FEATURE_VI_READONLY("%s")
" %uL, %uC",
fn,
(size < 0 ? " [New file]" : ""),
IF_FEATURE_VI_READONLY(
((readonly_mode) ? " [Readonly]" : ""),
)
li, (int)(end - text)
);
} else if (strncmp(cmd, "file", i) == 0) { // what File is this
if (e >= 0) {
status_line_bold("No address allowed on this command");
goto ret;
}
if (args[0]) {
// user wants a new filename
exp = expand_args(args);
if (exp == NULL)
goto ret;
update_filename(exp);
} else {
// user wants file status info
last_status_cksum = 0; // force status update
}
} else if (strncmp(cmd, "features", i) == 0) { // what features are available
// print out values of all features
go_bottom_and_clear_to_eol();
cookmode();
show_help();
rawmode();
Hit_Return();
} else if (strncmp(cmd, "list", i) == 0) { // literal print line
if (!GOT_ADDRESS) { // no addr given- use defaults
q = begin_line(dot); // assume .,. for the range
r = end_line(dot);
}
go_bottom_and_clear_to_eol();
puts("\r");
for (; q <= r; q++) {
int c_is_no_print;
c = *q;
c_is_no_print = (c & 0x80) && !Isprint(c);
if (c_is_no_print) {
c = '.';
standout_start();
}
if (c == '\n') {
write1("$\r");
} else if (c < ' ' || c == 127) {
bb_putchar('^');
if (c == 127)
c = '?';
else
c += '@';
}
bb_putchar(c);
if (c_is_no_print)
standout_end();
}
Hit_Return();
} else if (strncmp(cmd, "quit", i) == 0 // quit
|| strncmp(cmd, "next", i) == 0 // edit next file
|| strncmp(cmd, "prev", i) == 0 // edit previous file
) {
int n;
if (useforce) {
if (*cmd == 'q') {
// force end of argv list
optind = cmdline_filecnt;
}
editing = 0;
goto ret;
}
// don't exit if the file been modified
if (modified_count) {
status_line_bold("No write since last change (:%s! overrides)", cmd);
goto ret;
}
// are there other file to edit
n = cmdline_filecnt - optind - 1;
if (*cmd == 'q' && n > 0) {
status_line_bold("%u more file(s) to edit", n);
goto ret;
}
if (*cmd == 'n' && n <= 0) {
status_line_bold("No more files to edit");
goto ret;
}
if (*cmd == 'p') {
// are there previous files to edit
if (optind < 1) {
status_line_bold("No previous files to edit");
goto ret;
}
optind -= 2;
}
editing = 0;
} else if (strncmp(cmd, "read", i) == 0) { // read file into text[]
int size, num;
if (args[0]) {
// the user supplied a file name
fn = exp = expand_args(args);
if (exp == NULL)
goto ret;
init_filename(fn);
} else if (current_filename == NULL) {
// no user file name, no current name- punt
status_line_bold("No current filename");
goto ret;
}
if (e == 0) { // user said ":0r foo"
q = text;
} else { // read after given line or current line if none given
q = next_line(GOT_ADDRESS ? find_line(e) : dot);
// read after last line
if (q == end-1)
++q;
}
num = count_lines(text, q);
if (q == end)
num++;
{ // dance around potentially-reallocated text[]
uintptr_t ofs = q - text;
size = file_insert(fn, q, 0);
q = text + ofs;
}
if (size < 0)
goto ret; // nothing was inserted
// how many lines in text[]?
li = count_lines(q, q + size - 1);
status_line("'%s'"
IF_FEATURE_VI_READONLY("%s")
" %uL, %uC",
fn,
IF_FEATURE_VI_READONLY((readonly_mode ? " [Readonly]" : ""),)
li, size
);
dot = find_line(num);
} else if (strncmp(cmd, "rewind", i) == 0) { // rewind cmd line args
if (modified_count && !useforce) {
status_line_bold("No write since last change (:%s! overrides)", cmd);
} else {
// reset the filenames to edit
optind = -1; // start from 0th file
editing = 0;
}
# if ENABLE_FEATURE_VI_SET
} else if (strncmp(cmd, "set", i) == 0) { // set or clear features
# if ENABLE_FEATURE_VI_SETOPTS
char *argp, *argn, oldch;
# endif
// only blank is regarded as args delimiter. What about tab '\t'?
if (!args[0] || strcmp(args, "all") == 0) {
// print out values of all options
# if ENABLE_FEATURE_VI_SETOPTS
status_line_bold(
"%sautoindent "
"%sexpandtab "
"%sflash "
"%signorecase "
"%sshowmatch "
"tabstop=%u",
autoindent ? "" : "no",
expandtab ? "" : "no",
err_method ? "" : "no",
ignorecase ? "" : "no",
showmatch ? "" : "no",
tabstop
);
# endif
goto ret;
}
# if ENABLE_FEATURE_VI_SETOPTS
argp = args;
while (*argp) {
i = 0;
if (argp[0] == 'n' && argp[1] == 'o') // "noXXX"
i = 2;
argn = skip_non_whitespace(argp);
oldch = *argn;
*argn = '\0';
setops(argp, i);
*argn = oldch;
argp = skip_whitespace(argn);
}
# endif /* FEATURE_VI_SETOPTS */
# endif /* FEATURE_VI_SET */
# if ENABLE_FEATURE_VI_SEARCH
} else if (cmd[0] == 's') { // substitute a pattern with a replacement pattern
char *F, *R, *flags;
size_t len_F, len_R;
int gflag = 0; // global replace flag
int subs = 0; // number of substitutions
# if ENABLE_FEATURE_VI_VERBOSE_STATUS
int last_line = 0, lines = 0;
# endif
# if ENABLE_FEATURE_VI_REGEX_SEARCH
regex_t preg;
int cflags;
char *Rorig;
# if ENABLE_FEATURE_VI_UNDO
int undo = 0;
# endif
# endif
// F points to the "find" pattern
// R points to the "replace" pattern
// replace the cmd line delimiters "/" with NULs
c = buf[1]; // what is the delimiter
F = buf + 2; // start of "find"
R = strchr_backslash(F, c); // middle delimiter
if (!R)
goto colon_s_fail;
len_F = R - F;
*R++ = '\0'; // terminate "find"
flags = strchr_backslash(R, c);
if (flags) {
*flags++ = '\0'; // terminate "replace"
gflag = *flags;
}
if (len_F) { // save "find" as last search pattern
free(last_search_pattern);
last_search_pattern = xstrdup(F - 1);
last_search_pattern[0] = '/';
} else if (last_search_pattern[1] == '\0') {
status_line_bold("No previous search");
goto ret;
} else {
F = last_search_pattern + 1;
len_F = strlen(F);
}
if (!GOT_ADDRESS) { // no addr given
q = begin_line(dot); // start with cur line
r = end_line(dot);
b = e = count_lines(text, q); // cur line number
} else if (!GOT_RANGE) { // one addr given
b = e;
}
# if ENABLE_FEATURE_VI_REGEX_SEARCH
Rorig = R;
cflags = 0;
if (ignorecase)
cflags = REG_ICASE;
memset(&preg, 0, sizeof(preg));
if (regcomp(&preg, F, cflags) != 0) {
status_line(":s bad search pattern");
goto regex_search_end;
}
# else
len_R = strlen(R);
# endif
for (i = b; i <= e; i++) { // so, :20,23 s \0 find \0 replace \0
char *ls = q; // orig line start
char *found;
vc4:
# if ENABLE_FEATURE_VI_REGEX_SEARCH
found = regex_search(q, &preg, Rorig, &len_F, &len_R, &R);
# else
found = char_search(q, F, (FORWARD << 1) | LIMITED); // search cur line only for "find"
# endif
if (found) {
uintptr_t bias;
// we found the "find" pattern - delete it
// For undo support, the first item should not be chained
// This needs to be handled differently depending on
// whether or not regex support is enabled.
# if ENABLE_FEATURE_VI_REGEX_SEARCH
# define TEST_LEN_F len_F // len_F may be zero
# define TEST_UNDO1 undo++
# define TEST_UNDO2 undo++
# else
# define TEST_LEN_F 1 // len_F is never zero
# define TEST_UNDO1 subs
# define TEST_UNDO2 1
# endif
if (TEST_LEN_F) // match can be empty, no delete needed
text_hole_delete(found, found + len_F - 1,
TEST_UNDO1 ? ALLOW_UNDO_CHAIN : ALLOW_UNDO);
if (len_R != 0) { // insert the "replace" pattern, if required
bias = string_insert(found, R,
TEST_UNDO2 ? ALLOW_UNDO_CHAIN : ALLOW_UNDO);
found += bias;
ls += bias;
//q += bias; - recalculated anyway
}
# if ENABLE_FEATURE_VI_REGEX_SEARCH
free(R);
# endif
if (TEST_LEN_F || len_R != 0) {
dot = ls;
subs++;
# if ENABLE_FEATURE_VI_VERBOSE_STATUS
if (last_line != i) {
last_line = i;
++lines;
}
# endif
}
// check for "global" :s/foo/bar/g
if (gflag == 'g') {
if ((found + len_R) < end_line(ls)) {
q = found + len_R;
goto vc4; // don't let q move past cur line
}
}
}
q = next_line(ls);
}
if (subs == 0) {
status_line_bold("No match");
} else {
dot_skip_over_ws();
# if ENABLE_FEATURE_VI_VERBOSE_STATUS
if (subs > 1)
status_line("%d substitutions on %d lines", subs, lines);
# endif
}
# if ENABLE_FEATURE_VI_REGEX_SEARCH
regex_search_end:
regfree(&preg);
# endif
# endif /* FEATURE_VI_SEARCH */
} else if (strncmp(cmd, "version", i) == 0) { // show software version
status_line(BB_VER);
} else if (strncmp(cmd, "write", i) == 0 // write text to file
|| strcmp(cmd, "wq") == 0
|| strcmp(cmd, "wn") == 0
|| (cmd[0] == 'x' && !cmd[1])
) {
int size;
//int forced = FALSE;
// is there a file name to write to?
if (args[0]) {
struct stat statbuf;
exp = expand_args(args);
if (exp == NULL)
goto ret;
if (!useforce && (fn == NULL || strcmp(fn, exp) != 0) &&
stat(exp, &statbuf) == 0) {
status_line_bold("File exists (:w! overrides)");
goto ret;
}
fn = exp;
init_filename(fn);
}
# if ENABLE_FEATURE_VI_READONLY
else if (readonly_mode && !useforce && fn) {
status_line_bold("'%s' is read only", fn);
goto ret;
}
# endif
//if (useforce) {
// if "fn" is not write-able, chmod u+w
// sprintf(syscmd, "chmod u+w %s", fn);
// system(syscmd);
// forced = TRUE;
//}
if (modified_count != 0 || cmd[0] != 'x') {
size = r - q + 1;
l = file_write(fn, q, r);
} else {
size = 0;
l = 0;
}
//if (useforce && forced) {
// chmod u-w
// sprintf(syscmd, "chmod u-w %s", fn);
// system(syscmd);
// forced = FALSE;
//}
if (l < 0) {
if (l == -1)
status_line_bold_errno(fn);
} else {
// how many lines written
li = count_lines(q, q + l - 1);
status_line("'%s' %uL, %uC", fn, li, l);
if (l == size) {
if (q == text && q + l == end) {
modified_count = 0;
last_modified_count = -1;
}
if (cmd[1] == 'n') {
editing = 0;
} else if (cmd[0] == 'x' || cmd[1] == 'q') {
// are there other files to edit?
int n = cmdline_filecnt - optind - 1;
if (n > 0) {
if (useforce) {
// force end of argv list
optind = cmdline_filecnt;
} else {
status_line_bold("%u more file(s) to edit", n);
goto ret;
}
}
editing = 0;
}
}
}
# if ENABLE_FEATURE_VI_YANKMARK
} else if (strncmp(cmd, "yank", i) == 0) { // yank lines
if (!GOT_ADDRESS) { // no addr given- use defaults
q = begin_line(dot); // assume .,. for the range
r = end_line(dot);
}
text_yank(q, r, YDreg, WHOLE);
li = count_lines(q, r);
status_line("Yank %d lines (%d chars) into [%c]",
li, strlen(reg[YDreg]), what_reg());
# endif
} else {
// cmd unknown
not_implemented(cmd);
}
ret:
# if ENABLE_FEATURE_VI_COLON_EXPAND
free(exp);
# endif
dot = bound_dot(dot); // make sure "dot" is valid
return;
# if ENABLE_FEATURE_VI_SEARCH
colon_s_fail:
status_line(":s expression missing delimiters");
# endif
#endif /* FEATURE_VI_COLON */
}
//----- Char Routines --------------------------------------------
// Chars that are part of a word-
// 0123456789_ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz
// Chars that are Not part of a word (stoppers)
// !"#$%&'()*+,-./:;<=>?@[\]^`{|}~
// Chars that are WhiteSpace
// TAB NEWLINE VT FF RETURN SPACE
// DO NOT COUNT NEWLINE AS WHITESPACE
static int st_test(char *p, int type, int dir, char *tested)
{
char c, c0, ci;
int test, inc;
inc = dir;
c = c0 = p[0];
ci = p[inc];
test = 0;
if (type == S_BEFORE_WS) {
c = ci;
test = (!isspace(c) || c == '\n');
}
if (type == S_TO_WS) {
c = c0;
test = (!isspace(c) || c == '\n');
}
if (type == S_OVER_WS) {
c = c0;
test = isspace(c);
}
if (type == S_END_PUNCT) {
c = ci;
test = ispunct(c);
}
if (type == S_END_ALNUM) {
c = ci;
test = (isalnum(c) || c == '_');
}
*tested = c;
return test;
}
static char *skip_thing(char *p, int linecnt, int dir, int type)
{
char c;
while (st_test(p, type, dir, &c)) {
// make sure we limit search to correct number of lines
if (c == '\n' && --linecnt < 1)
break;
if (dir >= 0 && p >= end - 1)
break;
if (dir < 0 && p <= text)
break;
p += dir; // move to next char
}
return p;
}
#if ENABLE_FEATURE_VI_USE_SIGNALS
static void winch_handler(int sig UNUSED_PARAM)
{
int save_errno = errno;
// FIXME: do it in main loop!!!
signal(SIGWINCH, winch_handler);
query_screen_dimensions();
new_screen(rows, columns); // get memory for virtual screen
redraw(TRUE); // re-draw the screen
errno = save_errno;
}
static void tstp_handler(int sig UNUSED_PARAM)
{
int save_errno = errno;
// ioctl inside cookmode() was seen to generate SIGTTOU,
// stopping us too early. Prevent that:
signal(SIGTTOU, SIG_IGN);
go_bottom_and_clear_to_eol();
cookmode(); // terminal to "cooked"
// stop now
//signal(SIGTSTP, SIG_DFL);
//raise(SIGTSTP);
raise(SIGSTOP); // avoid "dance" with TSTP handler - use SIGSTOP instead
//signal(SIGTSTP, tstp_handler);
// we have been "continued" with SIGCONT, restore screen and termios
rawmode(); // terminal to "raw"
last_status_cksum = 0; // force status update
redraw(TRUE); // re-draw the screen
errno = save_errno;
}
static void int_handler(int sig)
{
signal(SIGINT, int_handler);
siglongjmp(restart, sig);
}
#endif /* FEATURE_VI_USE_SIGNALS */
static void do_cmd(int c);
static int at_eof(const char *s)
{
// does 's' point to end of file, even with no terminating newline?
return ((s == end - 2 && s[1] == '\n') || s == end - 1);
}
static int find_range(char **start, char **stop, int cmd)
{
char *p, *q, *t;
int buftype = -1;
int c;
p = q = dot;
#if ENABLE_FEATURE_VI_YANKMARK
if (cmd == 'Y') {
c = 'y';
} else
#endif
{
c = get_motion_char();
}
#if ENABLE_FEATURE_VI_YANKMARK
if ((cmd == 'Y' || cmd == c) && strchr("cdy><", c)) {
#else
if (cmd == c && strchr("cd><", c)) {
#endif
// these cmds operate on whole lines
buftype = WHOLE;
if (--cmdcnt > 0) {
do_cmd('j');
if (cmd_error)
buftype = -1;
}
} else if (strchr("^%$0bBeEfFtThnN/?|{}\b\177", c)) {
// Most operate on char positions within a line. Of those that
// don't '%' needs no special treatment, search commands are
// marked as MULTI and "{}" are handled below.
buftype = strchr("nN/?", c) ? MULTI : PARTIAL;
do_cmd(c); // execute movement cmd
if (p == dot) // no movement is an error
buftype = -1;
} else if (strchr("wW", c)) {
buftype = MULTI;
do_cmd(c); // execute movement cmd
// step back one char, but not if we're at end of file,
// or if we are at EOF and search was for 'w' and we're at
// the start of a 'W' word.
if (dot > p && (!at_eof(dot) || (c == 'w' && ispunct(*dot))))
dot--;
t = dot;
// don't include trailing WS as part of word
while (dot > p && isspace(*dot)) {
if (*dot-- == '\n')
t = dot;
}
// for non-change operations WS after NL is not part of word
if (cmd != 'c' && dot != t && *dot != '\n')
dot = t;
} else if (strchr("GHL+-gjk'\r\n", c)) {
// these operate on whole lines
buftype = WHOLE;
do_cmd(c); // execute movement cmd
if (cmd_error)
buftype = -1;
} else if (c == ' ' || c == 'l') {
// forward motion by character
int tmpcnt = (cmdcnt ?: 1);
buftype = PARTIAL;
do_cmd(c); // execute movement cmd
// exclude last char unless range isn't what we expected
// this indicates we've hit EOL
if (tmpcnt == dot - p)
dot--;
}
if (buftype == -1) {
if (c != 27)
indicate_error();
return buftype;
}
q = dot;
if (q < p) {
t = q;
q = p;
p = t;
}
// movements which don't include end of range
if (q > p) {
if (strchr("^0bBFThnN/?|\b\177", c)) {
q--;
} else if (strchr("{}", c)) {
buftype = (p == begin_line(p) && (*q == '\n' || at_eof(q))) ?
WHOLE : MULTI;
if (!at_eof(q)) {
q--;
if (q > p && p != begin_line(p))
q--;
}
}
}
*start = p;
*stop = q;
return buftype;
}
//---------------------------------------------------------------------
//----- the Ascii Chart -----------------------------------------------
// 00 nul 01 soh 02 stx 03 etx 04 eot 05 enq 06 ack 07 bel
// 08 bs 09 ht 0a nl 0b vt 0c np 0d cr 0e so 0f si
// 10 dle 11 dc1 12 dc2 13 dc3 14 dc4 15 nak 16 syn 17 etb
// 18 can 19 em 1a sub 1b esc 1c fs 1d gs 1e rs 1f us
// 20 sp 21 ! 22 " 23 # 24 $ 25 % 26 & 27 '
// 28 ( 29 ) 2a * 2b + 2c , 2d - 2e . 2f /
// 30 0 31 1 32 2 33 3 34 4 35 5 36 6 37 7
// 38 8 39 9 3a : 3b ; 3c < 3d = 3e > 3f ?
// 40 @ 41 A 42 B 43 C 44 D 45 E 46 F 47 G
// 48 H 49 I 4a J 4b K 4c L 4d M 4e N 4f O
// 50 P 51 Q 52 R 53 S 54 T 55 U 56 V 57 W
// 58 X 59 Y 5a Z 5b [ 5c \ 5d ] 5e ^ 5f _
// 60 ` 61 a 62 b 63 c 64 d 65 e 66 f 67 g
// 68 h 69 i 6a j 6b k 6c l 6d m 6e n 6f o
// 70 p 71 q 72 r 73 s 74 t 75 u 76 v 77 w
// 78 x 79 y 7a z 7b { 7c | 7d } 7e ~ 7f del
//---------------------------------------------------------------------
//----- Execute a Vi Command -----------------------------------
static void do_cmd(int c)
{
char *p, *q, *save_dot;
char buf[12];
int dir;
int cnt, i, j;
int c1;
#if ENABLE_FEATURE_VI_YANKMARK
char *orig_dot = dot;
#endif
#if ENABLE_FEATURE_VI_UNDO
int allow_undo = ALLOW_UNDO;
int undo_del = UNDO_DEL;
#endif
// c1 = c; // quiet the compiler
// cnt = yf = 0; // quiet the compiler
// p = q = save_dot = buf; // quiet the compiler
memset(buf, '\0', sizeof(buf));
keep_index = FALSE;
cmd_error = FALSE;
show_status_line();
// if this is a cursor key, skip these checks
switch (c) {
case KEYCODE_UP:
case KEYCODE_DOWN:
case KEYCODE_LEFT:
case KEYCODE_RIGHT:
case KEYCODE_HOME:
case KEYCODE_END:
case KEYCODE_PAGEUP:
case KEYCODE_PAGEDOWN:
case KEYCODE_DELETE:
goto key_cmd_mode;
}
if (cmd_mode == 2) {
// flip-flop Insert/Replace mode
if (c == KEYCODE_INSERT)
goto dc_i;
// we are 'R'eplacing the current *dot with new char
if (*dot == '\n') {
// don't Replace past E-o-l
cmd_mode = 1; // convert to insert
undo_queue_commit();
} else {
if (1 <= c || Isprint(c)) {
if (c != 27)
dot = yank_delete(dot, dot, PARTIAL, YANKDEL, ALLOW_UNDO); // delete char
dot = char_insert(dot, c, ALLOW_UNDO_CHAIN); // insert new char
}
goto dc1;
}
}
if (cmd_mode == 1) {
// hitting "Insert" twice means "R" replace mode
if (c == KEYCODE_INSERT) goto dc5;
// insert the char c at "dot"
if (1 <= c || Isprint(c)) {
dot = char_insert(dot, c, ALLOW_UNDO_QUEUED);
}
goto dc1;
}
key_cmd_mode:
switch (c) {
//case 0x01: // soh
//case 0x09: // ht
//case 0x0b: // vt
//case 0x0e: // so
//case 0x0f: // si
//case 0x10: // dle
//case 0x11: // dc1
//case 0x13: // dc3
#if ENABLE_FEATURE_VI_CRASHME
case 0x14: // dc4 ctrl-T
crashme = (crashme == 0) ? 1 : 0;
break;
#endif
//case 0x16: // syn
//case 0x17: // etb
//case 0x18: // can
//case 0x1c: // fs
//case 0x1d: // gs
//case 0x1e: // rs
//case 0x1f: // us
//case '!': // !-
//case '#': // #-
//case '&': // &-
//case '(': // (-
//case ')': // )-
//case '*': // *-
//case '=': // =-
//case '@': // @-
//case 'K': // K-
//case 'Q': // Q-
//case 'S': // S-
//case 'V': // V-
//case '[': // [-
//case '\\': // \-
//case ']': // ]-
//case '_': // _-
//case '`': // `-
//case 'v': // v-
default: // unrecognized command
buf[0] = c;
buf[1] = '\0';
not_implemented(buf);
end_cmd_q(); // stop adding to q
case 0x00: // nul- ignore
break;
case 2: // ctrl-B scroll up full screen
case KEYCODE_PAGEUP: // Cursor Key Page Up
dot_scroll(rows - 2, -1);
break;
case 4: // ctrl-D scroll down half screen
dot_scroll((rows - 2) / 2, 1);
break;
case 5: // ctrl-E scroll down one line
dot_scroll(1, 1);
break;
case 6: // ctrl-F scroll down full screen
case KEYCODE_PAGEDOWN: // Cursor Key Page Down
dot_scroll(rows - 2, 1);
break;
case 7: // ctrl-G show current status
last_status_cksum = 0; // force status update
break;
case 'h': // h- move left
case KEYCODE_LEFT: // cursor key Left
case 8: // ctrl-H- move left (This may be ERASE char)
case 0x7f: // DEL- move left (This may be ERASE char)
do {
dot_left();
} while (--cmdcnt > 0);
break;
case 10: // Newline ^J
case 'j': // j- goto next line, same col
case KEYCODE_DOWN: // cursor key Down
case 13: // Carriage Return ^M
case '+': // +- goto next line
q = dot;
do {
p = next_line(q);
if (p == end_line(q)) {
indicate_error();
goto dc1;
}
q = p;
} while (--cmdcnt > 0);
dot = q;
if (c == 13 || c == '+') {
dot_skip_over_ws();
} else {
// try to stay in saved column
dot = cindex == C_END ? end_line(dot) : move_to_col(dot, cindex);
keep_index = TRUE;
}
break;
case 12: // ctrl-L force redraw whole screen
case 18: // ctrl-R force redraw
redraw(TRUE); // this will redraw the entire display
break;
case 21: // ctrl-U scroll up half screen
dot_scroll((rows - 2) / 2, -1);
break;
case 25: // ctrl-Y scroll up one line
dot_scroll(1, -1);
break;
case 27: // esc
if (cmd_mode == 0)
indicate_error();
cmd_mode = 0; // stop inserting
undo_queue_commit();
end_cmd_q();
last_status_cksum = 0; // force status update
break;
case ' ': // move right
case 'l': // move right
case KEYCODE_RIGHT: // Cursor Key Right
do {
dot_right();
} while (--cmdcnt > 0);
break;
#if ENABLE_FEATURE_VI_YANKMARK
case '"': // "- name a register to use for Delete/Yank
c1 = (get_one_char() | 0x20) - 'a'; // | 0x20 is tolower()
if ((unsigned)c1 <= 25) { // a-z?
YDreg = c1;
} else {
indicate_error();
}
break;
case '\'': // '- goto a specific mark
c1 = (get_one_char() | 0x20);
if ((unsigned)(c1 - 'a') <= 25) { // a-z?
c1 = (c1 - 'a');
// get the b-o-l
q = mark[c1];
if (text <= q && q < end) {
dot = q;
dot_begin(); // go to B-o-l
dot_skip_over_ws();
} else {
indicate_error();
}
} else if (c1 == '\'') { // goto previous context
dot = swap_context(dot); // swap current and previous context
dot_begin(); // go to B-o-l
dot_skip_over_ws();
#if ENABLE_FEATURE_VI_YANKMARK
orig_dot = dot; // this doesn't update stored contexts
#endif
} else {
indicate_error();
}
break;
case 'm': // m- Mark a line
// this is really stupid. If there are any inserts or deletes
// between text[0] and dot then this mark will not point to the
// correct location! It could be off by many lines!
// Well..., at least its quick and dirty.
c1 = (get_one_char() | 0x20) - 'a';
if ((unsigned)c1 <= 25) { // a-z?
// remember the line
mark[c1] = dot;
} else {
indicate_error();
}
break;
case 'P': // P- Put register before
case 'p': // p- put register after
p = reg[YDreg];
if (p == NULL) {
status_line_bold("Nothing in register %c", what_reg());
break;
}
cnt = 0;
i = cmdcnt ?: 1;
// are we putting whole lines or strings
if (regtype[YDreg] == WHOLE) {
if (c == 'P') {
dot_begin(); // putting lines- Put above
}
else /* if ( c == 'p') */ {
// are we putting after very last line?
if (end_line(dot) == (end - 1)) {
dot = end; // force dot to end of text[]
} else {
dot_next(); // next line, then put before
}
}
} else {
if (c == 'p')
dot_right(); // move to right, can move to NL
// how far to move cursor if register doesn't have a NL
if (strchr(p, '\n') == NULL)
cnt = i * strlen(p) - 1;
}
do {
// dot is adjusted if text[] is reallocated so we don't have to
string_insert(dot, p, allow_undo); // insert the string
# if ENABLE_FEATURE_VI_UNDO
allow_undo = ALLOW_UNDO_CHAIN;
# endif
} while (--cmdcnt > 0);
dot += cnt;
dot_skip_over_ws();
# if ENABLE_FEATURE_VI_YANKMARK && ENABLE_FEATURE_VI_VERBOSE_STATUS
yank_status("Put", p, i);
# endif
end_cmd_q(); // stop adding to q
break;
case 'U': // U- Undo; replace current line with original version
if (reg[Ureg] != NULL) {
p = begin_line(dot);
q = end_line(dot);
p = text_hole_delete(p, q, ALLOW_UNDO); // delete cur line
p += string_insert(p, reg[Ureg], ALLOW_UNDO_CHAIN); // insert orig line
dot = p;
dot_skip_over_ws();
# if ENABLE_FEATURE_VI_YANKMARK && ENABLE_FEATURE_VI_VERBOSE_STATUS
yank_status("Undo", reg[Ureg], 1);
# endif
}
break;
#endif /* FEATURE_VI_YANKMARK */
#if ENABLE_FEATURE_VI_UNDO
case 'u': // u- undo last operation
undo_pop();
break;
#endif
case '$': // $- goto end of line
case KEYCODE_END: // Cursor Key End
for (;;) {
dot = end_line(dot);
if (--cmdcnt <= 0)
break;
dot_next();
}
cindex = C_END;
keep_index = TRUE;
break;
case '%': // %- find matching char of pair () [] {}
for (q = dot; q < end && *q != '\n'; q++) {
if (strchr("()[]{}", *q) != NULL) {
// we found half of a pair
p = find_pair(q, *q);
if (p == NULL) {
indicate_error();
} else {
dot = p;
}
break;
}
}
if (*q == '\n')
indicate_error();
break;
case 'f': // f- forward to a user specified char
case 'F': // F- backward to a user specified char
case 't': // t- move to char prior to next x
case 'T': // T- move to char after previous x
last_search_char = get_one_char(); // get the search char
last_search_cmd = c;
// fall through
case ';': // ;- look at rest of line for last search char
case ',': // ,- repeat latest search in opposite direction
dot_to_char(c != ',' ? last_search_cmd : last_search_cmd ^ 0x20);
break;
#if ENABLE_FEATURE_VI_DOT_CMD
case '.': // .- repeat the last modifying command
// Stuff the last_modifying_cmd back into stdin
// and let it be re-executed.
if (lmc_len != 0) {
if (cmdcnt) // update saved count if current count is non-zero
dotcnt = cmdcnt;
last_modifying_cmd[lmc_len] = '\0';
ioq = ioq_start = xasprintf("%u%s", dotcnt, last_modifying_cmd);
}
break;
#endif
#if ENABLE_FEATURE_VI_SEARCH
case 'N': // N- backward search for last pattern
dir = last_search_pattern[0] == '/' ? BACK : FORWARD;
goto dc4; // now search for pattern
break;
case '?': // ?- backward search for a pattern
case '/': // /- forward search for a pattern
buf[0] = c;
buf[1] = '\0';
q = get_input_line(buf); // get input line- use "status line"
if (!q[0]) // user changed mind and erased the "/"- do nothing
break;
if (!q[1]) { // if no pat re-use old pat
if (last_search_pattern[0])
last_search_pattern[0] = c;
} else { // strlen(q) > 1: new pat- save it and find
free(last_search_pattern);
last_search_pattern = xstrdup(q);
}
// fall through
case 'n': // n- repeat search for last pattern
// search rest of text[] starting at next char
// if search fails "dot" is unchanged
dir = last_search_pattern[0] == '/' ? FORWARD : BACK;
dc4:
if (last_search_pattern[1] == '\0') {
status_line_bold("No previous search");
break;
}
do {
q = char_search(dot + dir, last_search_pattern + 1,
(dir << 1) | FULL);
if (q != NULL) {
dot = q; // good search, update "dot"
} else {
// no pattern found between "dot" and top/bottom of file
// continue from other end of file
const char *msg;
q = char_search(dir == FORWARD ? text : end - 1,
last_search_pattern + 1, (dir << 1) | FULL);
if (q != NULL) { // found something
dot = q; // found new pattern- goto it
msg = "search hit %s, continuing at %s";
} else { // pattern is nowhere in file
cmdcnt = 0; // force exit from loop
msg = "Pattern not found";
}
if (dir == FORWARD)
status_line_bold(msg, "BOTTOM", "TOP");
else
status_line_bold(msg, "TOP", "BOTTOM");
}
} while (--cmdcnt > 0);
break;
case '{': // {- move backward paragraph
case '}': // }- move forward paragraph
dir = c == '}' ? FORWARD : BACK;
do {
int skip = TRUE; // initially skip consecutive empty lines
while (dir == FORWARD ? dot < end - 1 : dot > text) {
if (*dot == '\n' && dot[dir] == '\n') {
if (!skip) {
if (dir == FORWARD)
++dot; // move to next blank line
goto dc2;
}
}
else {
skip = FALSE;
}
dot += dir;
}
goto dc6; // end of file
dc2: continue;
} while (--cmdcnt > 0);
break;
#endif /* FEATURE_VI_SEARCH */
case '0': // 0- goto beginning of line
case '1': // 1-
case '2': // 2-
case '3': // 3-
case '4': // 4-
case '5': // 5-
case '6': // 6-
case '7': // 7-
case '8': // 8-
case '9': // 9-
if (c == '0' && cmdcnt < 1) {
dot_begin(); // this was a standalone zero
} else {
cmdcnt = cmdcnt * 10 + (c - '0'); // this 0 is part of a number
}
break;
case ':': // :- the colon mode commands
p = get_input_line(":"); // get input line- use "status line"
colon(p); // execute the command
break;
case '<': // <- Left shift something
case '>': // >- Right shift something
cnt = count_lines(text, dot); // remember what line we are on
if (find_range(&p, &q, c) == -1)
goto dc6;
i = count_lines(p, q); // # of lines we are shifting
for (p = begin_line(p); i > 0; i--, p = next_line(p)) {
if (c == '<') {
// shift left- remove tab or tabstop spaces
if (*p == '\t') {
// shrink buffer 1 char
text_hole_delete(p, p, allow_undo);
} else if (*p == ' ') {
// we should be calculating columns, not just SPACE
for (j = 0; *p == ' ' && j < tabstop; j++) {
text_hole_delete(p, p, allow_undo);
#if ENABLE_FEATURE_VI_UNDO
allow_undo = ALLOW_UNDO_CHAIN;
#endif
}
}
} else if (/* c == '>' && */ p != end_line(p)) {
// shift right -- add tab or tabstop spaces on non-empty lines
char_insert(p, '\t', allow_undo);
}
#if ENABLE_FEATURE_VI_UNDO
allow_undo = ALLOW_UNDO_CHAIN;
#endif
}
dot = find_line(cnt); // what line were we on
dot_skip_over_ws();
end_cmd_q(); // stop adding to q
break;
case 'A': // A- append at e-o-l
dot_end(); // go to e-o-l
//**** fall through to ... 'a'
case 'a': // a- append after current char
if (*dot != '\n')
dot++;
goto dc_i;
break;
case 'B': // B- back a blank-delimited Word
case 'E': // E- end of a blank-delimited word
case 'W': // W- forward a blank-delimited word
dir = FORWARD;
if (c == 'B')
dir = BACK;
do {
if (c == 'W' || isspace(dot[dir])) {
dot = skip_thing(dot, 1, dir, S_TO_WS);
dot = skip_thing(dot, 2, dir, S_OVER_WS);
}
if (c != 'W')
dot = skip_thing(dot, 1, dir, S_BEFORE_WS);
} while (--cmdcnt > 0);
break;
case 'C': // C- Change to e-o-l
case 'D': // D- delete to e-o-l
save_dot = dot;
dot = dollar_line(dot); // move to before NL
// copy text into a register and delete
dot = yank_delete(save_dot, dot, PARTIAL, YANKDEL, ALLOW_UNDO); // delete to e-o-l
if (c == 'C')
goto dc_i; // start inserting
#if ENABLE_FEATURE_VI_DOT_CMD
if (c == 'D')
end_cmd_q(); // stop adding to q
#endif
break;
case 'g': // 'gg' goto a line number (vim) (default: very first line)
c1 = get_one_char();
if (c1 != 'g') {
buf[0] = 'g';
// c1 < 0 if the key was special. Try "g<up-arrow>"
// TODO: if Unicode?
buf[1] = (c1 >= 0 ? c1 : '*');
buf[2] = '\0';
not_implemented(buf);
cmd_error = TRUE;
break;
}
if (cmdcnt == 0)
cmdcnt = 1;
// fall through
case 'G': // G- goto to a line number (default= E-O-F)
dot = end - 1; // assume E-O-F
if (cmdcnt > 0) {
dot = find_line(cmdcnt); // what line is #cmdcnt
}
dot_begin();
dot_skip_over_ws();
break;
case 'H': // H- goto top line on screen
dot = screenbegin;
if (cmdcnt > (rows - 1)) {
cmdcnt = (rows - 1);
}
while (--cmdcnt > 0) {
dot_next();
}
dot_begin();
dot_skip_over_ws();
break;
case 'I': // I- insert before first non-blank
dot_begin(); // 0
dot_skip_over_ws();
//**** fall through to ... 'i'
case 'i': // i- insert before current char
case KEYCODE_INSERT: // Cursor Key Insert
dc_i:
cmd_mode = 1; // start inserting
undo_queue_commit(); // commit queue when cmd_mode changes
break;
case 'J': // J- join current and next lines together
do {
dot_end(); // move to NL
if (dot < end - 1) { // make sure not last char in text[]
#if ENABLE_FEATURE_VI_UNDO
undo_push(dot, 1, UNDO_DEL);
*dot++ = ' '; // replace NL with space
undo_push((dot - 1), 1, UNDO_INS_CHAIN);
#else
*dot++ = ' ';
modified_count++;
#endif
while (isblank(*dot)) { // delete leading WS
text_hole_delete(dot, dot, ALLOW_UNDO_CHAIN);
}
}
} while (--cmdcnt > 0);
end_cmd_q(); // stop adding to q
break;
case 'L': // L- goto bottom line on screen
dot = end_screen();
if (cmdcnt > (rows - 1)) {
cmdcnt = (rows - 1);
}
while (--cmdcnt > 0) {
dot_prev();
}
dot_begin();
dot_skip_over_ws();
break;
case 'M': // M- goto middle line on screen
dot = screenbegin;
for (cnt = 0; cnt < (rows-1) / 2; cnt++)
dot = next_line(dot);
dot_skip_over_ws();
break;
case 'O': // O- open an empty line above
dot_begin();
#if ENABLE_FEATURE_VI_SETOPTS
indentcol = -1;
#endif
goto dc3;
case 'o': // o- open an empty line below
dot_end();
dc3:
dot = char_insert(dot, '\n', ALLOW_UNDO);
if (c == 'O' && !autoindent) {
// done in char_insert() for 'O'+autoindent
dot_prev();
}
goto dc_i;
break;
case 'R': // R- continuous Replace char
dc5:
cmd_mode = 2;
undo_queue_commit();
break;
case KEYCODE_DELETE:
if (dot < end - 1)
dot = yank_delete(dot, dot, PARTIAL, YANKDEL, ALLOW_UNDO);
break;
case 'X': // X- delete char before dot
case 'x': // x- delete the current char
case 's': // s- substitute the current char
dir = 0;
if (c == 'X')
dir = -1;
do {
if (dot[dir] != '\n') {
if (c == 'X')
dot--; // delete prev char
dot = yank_delete(dot, dot, PARTIAL, YANKDEL, allow_undo); // delete char
#if ENABLE_FEATURE_VI_UNDO
allow_undo = ALLOW_UNDO_CHAIN;
#endif
}
} while (--cmdcnt > 0);
end_cmd_q(); // stop adding to q
if (c == 's')
goto dc_i; // start inserting
break;
case 'Z': // Z- if modified, {write}; exit
// ZZ means to save file (if necessary), then exit
c1 = get_one_char();
if (c1 != 'Z') {
indicate_error();
break;
}
if (modified_count) {
if (ENABLE_FEATURE_VI_READONLY && readonly_mode && current_filename) {
status_line_bold("'%s' is read only", current_filename);
break;
}
cnt = file_write(current_filename, text, end - 1);
if (cnt < 0) {
if (cnt == -1)
status_line_bold("Write error: "STRERROR_FMT STRERROR_ERRNO);
} else if (cnt == (end - 1 - text + 1)) {
editing = 0;
}
} else {
editing = 0;
}
// are there other files to edit?
j = cmdline_filecnt - optind - 1;
if (editing == 0 && j > 0) {
editing = 1;
modified_count = 0;
last_modified_count = -1;
status_line_bold("%u more file(s) to edit", j);
}
break;
case '^': // ^- move to first non-blank on line
dot_begin();
dot_skip_over_ws();
break;
case 'b': // b- back a word
case 'e': // e- end of word
dir = FORWARD;
if (c == 'b')
dir = BACK;
do {
if ((dot + dir) < text || (dot + dir) > end - 1)
break;
dot += dir;
if (isspace(*dot)) {
dot = skip_thing(dot, (c == 'e') ? 2 : 1, dir, S_OVER_WS);
}
if (isalnum(*dot) || *dot == '_') {
dot = skip_thing(dot, 1, dir, S_END_ALNUM);
} else if (ispunct(*dot)) {
dot = skip_thing(dot, 1, dir, S_END_PUNCT);
}
} while (--cmdcnt > 0);
break;
case 'c': // c- change something
case 'd': // d- delete something
#if ENABLE_FEATURE_VI_YANKMARK
case 'y': // y- yank something
case 'Y': // Y- Yank a line
#endif
{
int yf = YANKDEL; // assume either "c" or "d"
int buftype;
#if ENABLE_FEATURE_VI_YANKMARK
# if ENABLE_FEATURE_VI_VERBOSE_STATUS
char *savereg = reg[YDreg];
# endif
if (c == 'y' || c == 'Y')
yf = YANKONLY;
#endif
// determine range, and whether it spans lines
buftype = find_range(&p, &q, c);
if (buftype == -1) // invalid range
goto dc6;
if (buftype == WHOLE) {
save_dot = p; // final cursor position is start of range
p = begin_line(p);
q = end_line(q);
}
dot = yank_delete(p, q, buftype, yf, ALLOW_UNDO); // delete word
if (buftype == WHOLE) {
if (c == 'c') {
dot = char_insert(dot, '\n', ALLOW_UNDO_CHAIN);
// on the last line of file don't move to prev line
if (dot != (end-1)) {
dot_prev();
}
} else if (c == 'd') {
dot_begin();
dot_skip_over_ws();
} else {
dot = save_dot;
}
}
// if CHANGING, not deleting, start inserting after the delete
if (c == 'c') {
goto dc_i; // start inserting
}
#if ENABLE_FEATURE_VI_YANKMARK && ENABLE_FEATURE_VI_VERBOSE_STATUS
// only update status if a yank has actually happened
if (reg[YDreg] != savereg)
yank_status(c == 'd' ? "Delete" : "Yank", reg[YDreg], 1);
#endif
dc6:
end_cmd_q(); // stop adding to q
break;
}
case 'k': // k- goto prev line, same col
case KEYCODE_UP: // cursor key Up
case '-': // -- goto prev line
q = dot;
do {
p = prev_line(q);
if (p == begin_line(q)) {
indicate_error();
goto dc1;
}
q = p;
} while (--cmdcnt > 0);
dot = q;
if (c == '-') {
dot_skip_over_ws();
} else {
// try to stay in saved column
dot = cindex == C_END ? end_line(dot) : move_to_col(dot, cindex);
keep_index = TRUE;
}
break;
case 'r': // r- replace the current char with user input
c1 = get_one_char(); // get the replacement char
if (c1 != 27) {
if (end_line(dot) - dot < (cmdcnt ?: 1)) {
indicate_error();
goto dc6;
}
do {
dot = text_hole_delete(dot, dot, allow_undo);
#if ENABLE_FEATURE_VI_UNDO
allow_undo = ALLOW_UNDO_CHAIN;
#endif
dot = char_insert(dot, c1, allow_undo);
} while (--cmdcnt > 0);
dot_left();
}
end_cmd_q(); // stop adding to q
break;
case 'w': // w- forward a word
do {
if (isalnum(*dot) || *dot == '_') { // we are on ALNUM
dot = skip_thing(dot, 1, FORWARD, S_END_ALNUM);
} else if (ispunct(*dot)) { // we are on PUNCT
dot = skip_thing(dot, 1, FORWARD, S_END_PUNCT);
}
if (dot < end - 1)
dot++; // move over word
if (isspace(*dot)) {
dot = skip_thing(dot, 2, FORWARD, S_OVER_WS);
}
} while (--cmdcnt > 0);
break;
case 'z': // z-
c1 = get_one_char(); // get the replacement char
cnt = 0;
if (c1 == '.')
cnt = (rows - 2) / 2; // put dot at center
if (c1 == '-')
cnt = rows - 2; // put dot at bottom
screenbegin = begin_line(dot); // start dot at top
dot_scroll(cnt, -1);
break;
case '|': // |- move to column "cmdcnt"
dot = move_to_col(dot, cmdcnt - 1); // try to move to column
break;
case '~': // ~- flip the case of letters a-z -> A-Z
do {
#if ENABLE_FEATURE_VI_UNDO
if (isalpha(*dot)) {
undo_push(dot, 1, undo_del);
*dot = islower(*dot) ? toupper(*dot) : tolower(*dot);
undo_push(dot, 1, UNDO_INS_CHAIN);
undo_del = UNDO_DEL_CHAIN;
}
#else
if (islower(*dot)) {
*dot = toupper(*dot);
modified_count++;
} else if (isupper(*dot)) {
*dot = tolower(*dot);
modified_count++;
}
#endif
dot_right();
} while (--cmdcnt > 0);
end_cmd_q(); // stop adding to q
break;
//----- The Cursor and Function Keys -----------------------------
case KEYCODE_HOME: // Cursor Key Home
dot_begin();
break;
// The Fn keys could point to do_macro which could translate them
#if 0
case KEYCODE_FUN1: // Function Key F1
case KEYCODE_FUN2: // Function Key F2
case KEYCODE_FUN3: // Function Key F3
case KEYCODE_FUN4: // Function Key F4
case KEYCODE_FUN5: // Function Key F5
case KEYCODE_FUN6: // Function Key F6
case KEYCODE_FUN7: // Function Key F7
case KEYCODE_FUN8: // Function Key F8
case KEYCODE_FUN9: // Function Key F9
case KEYCODE_FUN10: // Function Key F10
case KEYCODE_FUN11: // Function Key F11
case KEYCODE_FUN12: // Function Key F12
break;
#endif
}
dc1:
// if text[] just became empty, add back an empty line
if (end == text) {
char_insert(text, '\n', NO_UNDO); // start empty buf with dummy line
dot = text;
}
// it is OK for dot to exactly equal to end, otherwise check dot validity
if (dot != end) {
dot = bound_dot(dot); // make sure "dot" is valid
}
#if ENABLE_FEATURE_VI_YANKMARK
if (dot != orig_dot)
check_context(c); // update the current context
#endif
if (!isdigit(c))
cmdcnt = 0; // cmd was not a number, reset cmdcnt
cnt = dot - begin_line(dot);
// Try to stay off of the Newline
if (*dot == '\n' && cnt > 0 && cmd_mode == 0)
dot--;
}
// NB! the CRASHME code is unmaintained, and doesn't currently build
#if ENABLE_FEATURE_VI_CRASHME
static int totalcmds = 0;
static int Mp = 85; // Movement command Probability
static int Np = 90; // Non-movement command Probability
static int Dp = 96; // Delete command Probability
static int Ip = 97; // Insert command Probability
static int Yp = 98; // Yank command Probability
static int Pp = 99; // Put command Probability
static int M = 0, N = 0, I = 0, D = 0, Y = 0, P = 0, U = 0;
static const char chars[20] = "\t012345 abcdABCD-=.$";
static const char *const words[20] = {
"this", "is", "a", "test",
"broadcast", "the", "emergency", "of",
"system", "quick", "brown", "fox",
"jumped", "over", "lazy", "dogs",
"back", "January", "Febuary", "March"
};
static const char *const lines[20] = {
"You should have received a copy of the GNU General Public License\n",
"char c, cm, *cmd, *cmd1;\n",
"generate a command by percentages\n",
"Numbers may be typed as a prefix to some commands.\n",
"Quit, discarding changes!\n",
"Forced write, if permission originally not valid.\n",
"In general, any ex or ed command (such as substitute or delete).\n",
"I have tickets available for the Blazers vs LA Clippers for Monday, Janurary 1 at 1:00pm.\n",
"Please get w/ me and I will go over it with you.\n",
"The following is a list of scheduled, committed changes.\n",
"1. Launch Norton Antivirus (Start, Programs, Norton Antivirus)\n",
"Reminder....Town Meeting in Central Perk cafe today at 3:00pm.\n",
"Any question about transactions please contact Sterling Huxley.\n",
"I will try to get back to you by Friday, December 31.\n",
"This Change will be implemented on Friday.\n",
"Let me know if you have problems accessing this;\n",
"Sterling Huxley recently added you to the access list.\n",
"Would you like to go to lunch?\n",
"The last command will be automatically run.\n",
"This is too much english for a computer geek.\n",
};
static char *multilines[20] = {
"You should have received a copy of the GNU General Public License\n",
"char c, cm, *cmd, *cmd1;\n",
"generate a command by percentages\n",
"Numbers may be typed as a prefix to some commands.\n",
"Quit, discarding changes!\n",
"Forced write, if permission originally not valid.\n",
"In general, any ex or ed command (such as substitute or delete).\n",
"I have tickets available for the Blazers vs LA Clippers for Monday, Janurary 1 at 1:00pm.\n",
"Please get w/ me and I will go over it with you.\n",
"The following is a list of scheduled, committed changes.\n",
"1. Launch Norton Antivirus (Start, Programs, Norton Antivirus)\n",
"Reminder....Town Meeting in Central Perk cafe today at 3:00pm.\n",
"Any question about transactions please contact Sterling Huxley.\n",
"I will try to get back to you by Friday, December 31.\n",
"This Change will be implemented on Friday.\n",
"Let me know if you have problems accessing this;\n",
"Sterling Huxley recently added you to the access list.\n",
"Would you like to go to lunch?\n",
"The last command will be automatically run.\n",
"This is too much english for a computer geek.\n",
};
// create a random command to execute
static void crash_dummy()
{
static int sleeptime; // how long to pause between commands
char c, cm, *cmd, *cmd1;
int i, cnt, thing, rbi, startrbi, percent;
// "dot" movement commands
cmd1 = " \n\r\002\004\005\006\025\0310^$-+wWeEbBhjklHL";
// is there already a command running?
if (readbuffer[0] > 0)
goto cd1;
cd0:
readbuffer[0] = 'X';
startrbi = rbi = 1;
sleeptime = 0; // how long to pause between commands
memset(readbuffer, '\0', sizeof(readbuffer));
// generate a command by percentages
percent = (int) lrand48() % 100; // get a number from 0-99
if (percent < Mp) { // Movement commands
// available commands
cmd = cmd1;
M++;
} else if (percent < Np) { // non-movement commands
cmd = "mz<>\'\""; // available commands
N++;
} else if (percent < Dp) { // Delete commands
cmd = "dx"; // available commands
D++;
} else if (percent < Ip) { // Inset commands
cmd = "iIaAsrJ"; // available commands
I++;
} else if (percent < Yp) { // Yank commands
cmd = "yY"; // available commands
Y++;
} else if (percent < Pp) { // Put commands
cmd = "pP"; // available commands
P++;
} else {
// We do not know how to handle this command, try again
U++;
goto cd0;
}
// randomly pick one of the available cmds from "cmd[]"
i = (int) lrand48() % strlen(cmd);
cm = cmd[i];
if (strchr(":\024", cm))
goto cd0; // dont allow colon or ctrl-T commands
readbuffer[rbi++] = cm; // put cmd into input buffer
// now we have the command-
// there are 1, 2, and multi char commands
// find out which and generate the rest of command as necessary
if (strchr("dmryz<>\'\"", cm)) { // 2-char commands
cmd1 = " \n\r0$^-+wWeEbBhjklHL";
if (cm == 'm' || cm == '\'' || cm == '\"') { // pick a reg[]
cmd1 = "abcdefghijklmnopqrstuvwxyz";
}
thing = (int) lrand48() % strlen(cmd1); // pick a movement command
c = cmd1[thing];
readbuffer[rbi++] = c; // add movement to input buffer
}
if (strchr("iIaAsc", cm)) { // multi-char commands
if (cm == 'c') {
// change some thing
thing = (int) lrand48() % strlen(cmd1); // pick a movement command
c = cmd1[thing];
readbuffer[rbi++] = c; // add movement to input buffer
}
thing = (int) lrand48() % 4; // what thing to insert
cnt = (int) lrand48() % 10; // how many to insert
for (i = 0; i < cnt; i++) {
if (thing == 0) { // insert chars
readbuffer[rbi++] = chars[((int) lrand48() % strlen(chars))];
} else if (thing == 1) { // insert words
strcat(readbuffer, words[(int) lrand48() % 20]);
strcat(readbuffer, " ");
sleeptime = 0; // how fast to type
} else if (thing == 2) { // insert lines
strcat(readbuffer, lines[(int) lrand48() % 20]);
sleeptime = 0; // how fast to type
} else { // insert multi-lines
strcat(readbuffer, multilines[(int) lrand48() % 20]);
sleeptime = 0; // how fast to type
}
}
strcat(readbuffer, ESC);
}
readbuffer[0] = strlen(readbuffer + 1);
cd1:
totalcmds++;
if (sleeptime > 0)
mysleep(sleeptime); // sleep 1/100 sec
}
// test to see if there are any errors
static void crash_test()
{
static time_t oldtim;
time_t tim;
char d[2], msg[80];
msg[0] = '\0';
if (end < text) {
strcat(msg, "end<text ");
}
if (end > textend) {
strcat(msg, "end>textend ");
}
if (dot < text) {
strcat(msg, "dot<text ");
}
if (dot > end) {
strcat(msg, "dot>end ");
}
if (screenbegin < text) {
strcat(msg, "screenbegin<text ");
}
if (screenbegin > end - 1) {
strcat(msg, "screenbegin>end-1 ");
}
if (msg[0]) {
printf("\n\n%d: \'%c\' %s\n\n\n%s[Hit return to continue]%s",
totalcmds, last_input_char, msg, ESC_BOLD_TEXT, ESC_NORM_TEXT);
fflush_all();
while (safe_read(STDIN_FILENO, d, 1) > 0) {
if (d[0] == '\n' || d[0] == '\r')
break;
}
}
tim = time(NULL);
if (tim >= (oldtim + 3)) {
sprintf(status_buffer,
"Tot=%d: M=%d N=%d I=%d D=%d Y=%d P=%d U=%d size=%d",
totalcmds, M, N, I, D, Y, P, U, end - text + 1);
oldtim = tim;
}
}
#endif
#if ENABLE_FEATURE_VI_COLON
static void run_cmds(char *p)
{
while (p) {
char *q = p;
p = strchr(q, '\n');
if (p)
while (*p == '\n')
*p++ = '\0';
if (strlen(q) < MAX_INPUT_LEN)
colon(q);
}
}
#endif
static void edit_file(char *fn)
{
#if ENABLE_FEATURE_VI_YANKMARK
#define cur_line edit_file__cur_line
#endif
int c;
#if ENABLE_FEATURE_VI_USE_SIGNALS
int sig;
#endif
editing = 1; // 0 = exit, 1 = one file, 2 = multiple files
rawmode();
rows = 24;
columns = 80;
IF_FEATURE_VI_ASK_TERMINAL(G.get_rowcol_error =) query_screen_dimensions();
#if ENABLE_FEATURE_VI_ASK_TERMINAL
if (G.get_rowcol_error /* TODO? && no input on stdin */) {
uint64_t k;
write1(ESC"[999;999H" ESC"[6n");
fflush_all();
k = read_key(STDIN_FILENO, readbuffer, /*timeout_ms:*/ 100);
if ((int32_t)k == KEYCODE_CURSOR_POS) {
uint32_t rc = (k >> 32);
columns = (rc & 0x7fff);
if (columns > MAX_SCR_COLS)
columns = MAX_SCR_COLS;
rows = ((rc >> 16) & 0x7fff);
if (rows > MAX_SCR_ROWS)
rows = MAX_SCR_ROWS;
}
}
#endif
new_screen(rows, columns); // get memory for virtual screen
init_text_buffer(fn);
#if ENABLE_FEATURE_VI_YANKMARK
YDreg = 26; // default Yank/Delete reg
// Ureg = 27; - const // hold orig line for "U" cmd
mark[26] = mark[27] = text; // init "previous context"
#endif
#if ENABLE_FEATURE_VI_CRASHME
last_input_char = '\0';
#endif
crow = 0;
ccol = 0;
#if ENABLE_FEATURE_VI_USE_SIGNALS
signal(SIGWINCH, winch_handler);
signal(SIGTSTP, tstp_handler);
sig = sigsetjmp(restart, 1);
if (sig != 0) {
screenbegin = dot = text;
}
// int_handler() can jump to "restart",
// must install handler *after* initializing "restart"
signal(SIGINT, int_handler);
#endif
cmd_mode = 0; // 0=command 1=insert 2='R'eplace
cmdcnt = 0;
offset = 0; // no horizontal offset
c = '\0';
#if ENABLE_FEATURE_VI_DOT_CMD
free(ioq_start);
ioq_start = NULL;
adding2q = 0;
#endif
#if ENABLE_FEATURE_VI_COLON
while (initial_cmds)
run_cmds((char *)llist_pop(&initial_cmds));
#endif
redraw(FALSE); // dont force every col re-draw
//------This is the main Vi cmd handling loop -----------------------
while (editing > 0) {
#if ENABLE_FEATURE_VI_CRASHME
if (crashme > 0) {
if ((end - text) > 1) {
crash_dummy(); // generate a random command
} else {
crashme = 0;
string_insert(text, "\n\n##### Ran out of text to work on. #####\n\n", NO_UNDO);
dot = text;
refresh(FALSE);
}
}
#endif
c = get_one_char(); // get a cmd from user
#if ENABLE_FEATURE_VI_CRASHME
last_input_char = c;
#endif
#if ENABLE_FEATURE_VI_YANKMARK
// save a copy of the current line- for the 'U" command
if (begin_line(dot) != cur_line) {
cur_line = begin_line(dot);
text_yank(begin_line(dot), end_line(dot), Ureg, PARTIAL);
}
#endif
#if ENABLE_FEATURE_VI_DOT_CMD
// If c is a command that changes text[],
// (re)start remembering the input for the "." command.
if (!adding2q
&& ioq_start == NULL
&& cmd_mode == 0 // command mode
&& c > '\0' // exclude NUL and non-ASCII chars
&& c < 0x7f // (Unicode and such)
&& strchr(modifying_cmds, c)
) {
start_new_cmd_q(c);
}
#endif
do_cmd(c); // execute the user command
// poll to see if there is input already waiting. if we are
// not able to display output fast enough to keep up, skip
// the display update until we catch up with input.
if (!readbuffer[0] && mysleep(0) == 0) {
// no input pending - so update output
refresh(FALSE);
show_status_line();
}
#if ENABLE_FEATURE_VI_CRASHME
if (crashme > 0)
crash_test(); // test editor variables
#endif
}
//-------------------------------------------------------------------
go_bottom_and_clear_to_eol();
cookmode();
#undef cur_line
}
#define VI_OPTSTR \
IF_FEATURE_VI_CRASHME("C") \
IF_FEATURE_VI_COLON("c:*") \
"Hh" \
IF_FEATURE_VI_READONLY("R")
enum {
IF_FEATURE_VI_CRASHME(OPTBIT_C,)
IF_FEATURE_VI_COLON(OPTBIT_c,)
OPTBIT_H,
OPTBIT_h,
IF_FEATURE_VI_READONLY(OPTBIT_R,)
OPT_C = IF_FEATURE_VI_CRASHME( (1 << OPTBIT_C)) + 0,
OPT_c = IF_FEATURE_VI_COLON( (1 << OPTBIT_c)) + 0,
OPT_H = 1 << OPTBIT_H,
OPT_h = 1 << OPTBIT_h,
OPT_R = IF_FEATURE_VI_READONLY( (1 << OPTBIT_R)) + 0,
};
int vi_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int vi_main(int argc, char **argv)
{
int opts;
INIT_G();
#if ENABLE_FEATURE_VI_UNDO
//undo_stack_tail = NULL; - already is
# if ENABLE_FEATURE_VI_UNDO_QUEUE
undo_queue_state = UNDO_EMPTY;
//undo_q = 0; - already is
# endif
#endif
#if ENABLE_FEATURE_VI_CRASHME
srand((long) getpid());
#endif
#ifdef NO_SUCH_APPLET_YET
// if we aren't "vi", we are "view"
if (ENABLE_FEATURE_VI_READONLY && applet_name[2]) {
SET_READONLY_MODE(readonly_mode);
}
#endif
// 0: all of our options are disabled by default in vim
//vi_setops = 0;
opts = getopt32(argv, VI_OPTSTR IF_FEATURE_VI_COLON(, &initial_cmds));
#if ENABLE_FEATURE_VI_CRASHME
if (opts & OPT_C)
crashme = 1;
#endif
if (opts & OPT_R)
SET_READONLY_MODE(readonly_mode);
if (opts & OPT_H)
show_help();
if (opts & (OPT_H | OPT_h)) {
bb_show_usage();
return 1;
}
argv += optind;
cmdline_filecnt = argc - optind;
// 1- process EXINIT variable from environment
// 2- if EXINIT is unset process $HOME/.exrc file
// 3- process command line args
#if ENABLE_FEATURE_VI_COLON
{
const char *exinit = getenv("EXINIT");
char *cmds = NULL;
if (exinit) {
cmds = xstrdup(exinit);
} else {
const char *home = getenv("HOME");
if (home && *home) {
char *exrc = concat_path_file(home, ".exrc");
struct stat st;
// .exrc must belong to and only be writable by user
if (stat(exrc, &st) == 0) {
if ((st.st_mode & (S_IWGRP|S_IWOTH)) == 0
&& st.st_uid == getuid()
) {
cmds = xmalloc_open_read_close(exrc, NULL);
} else {
status_line_bold(".exrc: permission denied");
}
}
free(exrc);
}
}
if (cmds) {
init_text_buffer(NULL);
run_cmds(cmds);
free(cmds);
}
}
#endif
// "Save cursor, use alternate screen buffer, clear screen"
write1(ESC"[?1049h");
// This is the main file handling loop
optind = 0;
while (1) {
edit_file(argv[optind]); // might be NULL on 1st iteration
// NB: optind can be changed by ":next" and ":rewind" commands
optind++;
if (optind >= cmdline_filecnt)
break;
}
// "Use normal screen buffer, restore cursor"
write1(ESC"[?1049l");
return 0;
}