1 /* vi: set sw=4 ts=4: */
3 * tiny vi.c: A small 'vi' clone
4 * Copyright (C) 2000, 2001 Sterling Huxley <sterling@europa.com>
6 * Licensed under GPLv2 or later, see file LICENSE in this source tree.
12 * $HOME/.exrc and ./.exrc
13 * add magic to search /foo.*bar
16 * if mark[] values were line numbers rather than pointers
17 * it would be easier to change the mark when add/delete lines
18 * More intelligence in refresh()
19 * ":r !cmd" and "!cmd" to filter text through an external command
20 * A true "undo" facility
21 * An "ex" line oriented mode- maybe using "cmdedit"
28 //config: 'vi' is a text editor. More specifically, it is the One True
29 //config: text editor <grin>. It does, however, have a rather steep
30 //config: learning curve. If you are not already comfortable with 'vi'
31 //config: you may wish to use something else.
33 //config:config FEATURE_VI_MAX_LEN
34 //config: int "Maximum screen width in vi"
35 //config: range 256 16384
36 //config: default 4096
37 //config: depends on VI
39 //config: Contrary to what you may think, this is not eating much.
40 //config: Make it smaller than 4k only if you are very limited on memory.
42 //config:config FEATURE_VI_8BIT
43 //config: bool "Allow vi to display 8-bit chars (otherwise shows dots)"
45 //config: depends on VI
47 //config: If your terminal can display characters with high bit set,
48 //config: you may want to enable this. Note: vi is not Unicode-capable.
49 //config: If your terminal combines several 8-bit bytes into one character
50 //config: (as in Unicode mode), this will not work properly.
52 //config:config FEATURE_VI_COLON
53 //config: bool "Enable \":\" colon commands (no \"ex\" mode)"
55 //config: depends on VI
57 //config: Enable a limited set of colon commands for vi. This does not
58 //config: provide an "ex" mode.
60 //config:config FEATURE_VI_YANKMARK
61 //config: bool "Enable yank/put commands and mark cmds"
63 //config: depends on VI
65 //config: This will enable you to use yank and put, as well as mark in
68 //config:config FEATURE_VI_SEARCH
69 //config: bool "Enable search and replace cmds"
71 //config: depends on VI
73 //config: Select this if you wish to be able to do search and replace in
76 //config:config FEATURE_VI_REGEX_SEARCH
77 //config: bool "Enable regex in search and replace"
78 //config: default n # Uses GNU regex, which may be unavailable. FIXME
79 //config: depends on FEATURE_VI_SEARCH
81 //config: Use extended regex search.
83 //config:config FEATURE_VI_USE_SIGNALS
84 //config: bool "Catch signals"
86 //config: depends on VI
88 //config: Selecting this option will make busybox vi signal aware. This will
89 //config: make busybox vi support SIGWINCH to deal with Window Changes, catch
90 //config: Ctrl-Z and Ctrl-C and alarms.
92 //config:config FEATURE_VI_DOT_CMD
93 //config: bool "Remember previous cmd and \".\" cmd"
95 //config: depends on VI
97 //config: Make busybox vi remember the last command and be able to repeat it.
99 //config:config FEATURE_VI_READONLY
100 //config: bool "Enable -R option and \"view\" mode"
102 //config: depends on VI
104 //config: Enable the read-only command line option, which allows the user to
105 //config: open a file in read-only mode.
107 //config:config FEATURE_VI_SETOPTS
108 //config: bool "Enable set-able options, ai ic showmatch"
110 //config: depends on VI
112 //config: Enable the editor to set some (ai, ic, showmatch) options.
114 //config:config FEATURE_VI_SET
115 //config: bool "Support for :set"
117 //config: depends on VI
119 //config: Support for ":set".
121 //config:config FEATURE_VI_WIN_RESIZE
122 //config: bool "Handle window resize"
124 //config: depends on VI
126 //config: Make busybox vi behave nicely with terminals that get resized.
128 //config:config FEATURE_VI_ASK_TERMINAL
129 //config: bool "Use 'tell me cursor position' ESC sequence to measure window"
131 //config: depends on VI
133 //config: If terminal size can't be retrieved and $LINES/$COLUMNS are not set,
134 //config: this option makes vi perform a last-ditch effort to find it:
135 //config: position cursor to 999,999 and ask terminal to report real
136 //config: cursor position using "ESC [ 6 n" escape sequence, then read stdin.
138 //config: This is not clean but helps a lot on serial lines and such.
140 //applet:IF_VI(APPLET(vi, BB_DIR_BIN, BB_SUID_DROP))
142 //kbuild:lib-$(CONFIG_VI) += vi.o
144 //usage:#define vi_trivial_usage
145 //usage: "[OPTIONS] [FILE]..."
146 //usage:#define vi_full_usage "\n\n"
147 //usage: "Edit FILE\n"
148 //usage: IF_FEATURE_VI_COLON(
149 //usage: "\n -c CMD Initial command to run ($EXINIT also available)"
151 //usage: IF_FEATURE_VI_READONLY(
152 //usage: "\n -R Read-only"
154 //usage: "\n -H List available features"
157 /* Should be after libbb.h: on some systems regex.h needs sys/types.h: */
158 #if ENABLE_FEATURE_VI_REGEX_SEARCH
162 /* the CRASHME code is unmaintained, and doesn't currently build */
163 #define ENABLE_FEATURE_VI_CRASHME 0
166 #if ENABLE_LOCALE_SUPPORT
168 #if ENABLE_FEATURE_VI_8BIT
169 //FIXME: this does not work properly for Unicode anyway
170 # define Isprint(c) (isprint)(c)
172 # define Isprint(c) isprint_asciionly(c)
177 /* 0x9b is Meta-ESC */
178 #if ENABLE_FEATURE_VI_8BIT
179 # define Isprint(c) ((unsigned char)(c) >= ' ' && (c) != 0x7f && (unsigned char)(c) != 0x9b)
181 # define Isprint(c) ((unsigned char)(c) >= ' ' && (unsigned char)(c) < 0x7f)
188 MAX_TABSTOP = 32, // sanity limit
189 // User input len. Need not be extra big.
190 // Lines in file being edited *can* be bigger than this.
192 // Sanity limits. We have only one buffer of this size.
193 MAX_SCR_COLS = CONFIG_FEATURE_VI_MAX_LEN,
194 MAX_SCR_ROWS = CONFIG_FEATURE_VI_MAX_LEN,
197 /* VT102 ESC sequences.
198 * See "Xterm Control Sequences"
199 * http://invisible-island.net/xterm/ctlseqs/ctlseqs.html
201 /* Inverse/Normal text */
202 #define ESC_BOLD_TEXT "\033[7m"
203 #define ESC_NORM_TEXT "\033[0m"
205 #define ESC_BELL "\007"
206 /* Clear-to-end-of-line */
207 #define ESC_CLEAR2EOL "\033[K"
208 /* Clear-to-end-of-screen.
209 * (We use default param here.
210 * Full sequence is "ESC [ <num> J",
211 * <num> is 0/1/2 = "erase below/above/all".)
213 #define ESC_CLEAR2EOS "\033[J"
214 /* Cursor to given coordinate (1,1: top left) */
215 #define ESC_SET_CURSOR_POS "\033[%u;%uH"
217 ///* Cursor up and down */
218 //#define ESC_CURSOR_UP "\033[A"
219 //#define ESC_CURSOR_DOWN "\n"
221 #if ENABLE_FEATURE_VI_DOT_CMD || ENABLE_FEATURE_VI_YANKMARK
222 // cmds modifying text[]
223 // vda: removed "aAiIs" as they switch us into insert mode
224 // and remembering input for replay after them makes no sense
225 static const char modifying_cmds[] = "cCdDJoOpPrRxX<>~";
231 FORWARD = 1, // code depends on "1" for array index
232 BACK = -1, // code depends on "-1" for array index
233 LIMITED = 0, // how much of text[] in char_search
234 FULL = 1, // how much of text[] in char_search
236 S_BEFORE_WS = 1, // used in skip_thing() for moving "dot"
237 S_TO_WS = 2, // used in skip_thing() for moving "dot"
238 S_OVER_WS = 3, // used in skip_thing() for moving "dot"
239 S_END_PUNCT = 4, // used in skip_thing() for moving "dot"
240 S_END_ALNUM = 5, // used in skip_thing() for moving "dot"
244 /* vi.c expects chars to be unsigned. */
245 /* busybox build system provides that, but it's better */
246 /* to audit and fix the source */
249 /* many references - keep near the top of globals */
250 char *text, *end; // pointers to the user data in memory
251 char *dot; // where all the action takes place
252 int text_size; // size of the allocated buffer
256 #define VI_AUTOINDENT 1
257 #define VI_SHOWMATCH 2
258 #define VI_IGNORECASE 4
259 #define VI_ERR_METHOD 8
260 #define autoindent (vi_setops & VI_AUTOINDENT)
261 #define showmatch (vi_setops & VI_SHOWMATCH )
262 #define ignorecase (vi_setops & VI_IGNORECASE)
263 /* indicate error with beep or flash */
264 #define err_method (vi_setops & VI_ERR_METHOD)
266 #if ENABLE_FEATURE_VI_READONLY
267 smallint readonly_mode;
268 #define SET_READONLY_FILE(flags) ((flags) |= 0x01)
269 #define SET_READONLY_MODE(flags) ((flags) |= 0x02)
270 #define UNSET_READONLY_FILE(flags) ((flags) &= 0xfe)
272 #define SET_READONLY_FILE(flags) ((void)0)
273 #define SET_READONLY_MODE(flags) ((void)0)
274 #define UNSET_READONLY_FILE(flags) ((void)0)
277 smallint editing; // >0 while we are editing a file
278 // [code audit says "can be 0, 1 or 2 only"]
279 smallint cmd_mode; // 0=command 1=insert 2=replace
280 int file_modified; // buffer contents changed (counter, not flag!)
281 int last_file_modified; // = -1;
282 int save_argc; // how many file names on cmd line
283 int cmdcnt; // repetition count
284 unsigned rows, columns; // the terminal screen is this size
285 #if ENABLE_FEATURE_VI_ASK_TERMINAL
286 int get_rowcol_error;
288 int crow, ccol; // cursor is on Crow x Ccol
289 int offset; // chars scrolled off the screen to the left
290 int have_status_msg; // is default edit status needed?
291 // [don't make smallint!]
292 int last_status_cksum; // hash of current status line
293 char *current_filename;
294 char *screenbegin; // index into text[], of top line on the screen
295 char *screen; // pointer to the virtual screen buffer
296 int screensize; // and its size
298 int last_forward_char; // last char searched for with 'f' (int because of Unicode)
299 char erase_char; // the users erase character
300 char last_input_char; // last char read from user
302 #if ENABLE_FEATURE_VI_DOT_CMD
303 smallint adding2q; // are we currently adding user input to q
304 int lmc_len; // length of last_modifying_cmd
305 char *ioq, *ioq_start; // pointer to string for get_one_char to "read"
307 #if ENABLE_FEATURE_VI_USE_SIGNALS || ENABLE_FEATURE_VI_CRASHME
310 #if ENABLE_FEATURE_VI_SEARCH
311 char *last_search_pattern; // last pattern from a '/' or '?' search
315 #if ENABLE_FEATURE_VI_YANKMARK
316 char *edit_file__cur_line;
318 int refresh__old_offset;
319 int format_edit_status__tot;
321 /* a few references only */
322 #if ENABLE_FEATURE_VI_YANKMARK
323 int YDreg, Ureg; // default delete register and orig line for "U"
324 char *reg[28]; // named register a-z, "D", and "U" 0-25,26,27
325 char *mark[28]; // user marks points somewhere in text[]- a-z and previous context ''
326 char *context_start, *context_end;
328 #if ENABLE_FEATURE_VI_USE_SIGNALS
329 sigjmp_buf restart; // catch_sig()
331 struct termios term_orig, term_vi; // remember what the cooked mode was
332 #if ENABLE_FEATURE_VI_COLON
333 char *initial_cmds[3]; // currently 2 entries, NULL terminated
335 // Should be just enough to hold a key sequence,
336 // but CRASHME mode uses it as generated command buffer too
337 #if ENABLE_FEATURE_VI_CRASHME
338 char readbuffer[128];
340 char readbuffer[KEYCODE_BUFFER_SIZE];
342 #define STATUS_BUFFER_LEN 200
343 char status_buffer[STATUS_BUFFER_LEN]; // messages to the user
344 #if ENABLE_FEATURE_VI_DOT_CMD
345 char last_modifying_cmd[MAX_INPUT_LEN]; // last modifying cmd for "."
347 char get_input_line__buf[MAX_INPUT_LEN]; /* former static */
349 char scr_out_buf[MAX_SCR_COLS + MAX_TABSTOP * 2];
351 #define G (*ptr_to_globals)
352 #define text (G.text )
353 #define text_size (G.text_size )
358 #define vi_setops (G.vi_setops )
359 #define editing (G.editing )
360 #define cmd_mode (G.cmd_mode )
361 #define file_modified (G.file_modified )
362 #define last_file_modified (G.last_file_modified )
363 #define save_argc (G.save_argc )
364 #define cmdcnt (G.cmdcnt )
365 #define rows (G.rows )
366 #define columns (G.columns )
367 #define crow (G.crow )
368 #define ccol (G.ccol )
369 #define offset (G.offset )
370 #define status_buffer (G.status_buffer )
371 #define have_status_msg (G.have_status_msg )
372 #define last_status_cksum (G.last_status_cksum )
373 #define current_filename (G.current_filename )
374 #define screen (G.screen )
375 #define screensize (G.screensize )
376 #define screenbegin (G.screenbegin )
377 #define tabstop (G.tabstop )
378 #define last_forward_char (G.last_forward_char )
379 #define erase_char (G.erase_char )
380 #define last_input_char (G.last_input_char )
381 #if ENABLE_FEATURE_VI_READONLY
382 #define readonly_mode (G.readonly_mode )
384 #define readonly_mode 0
386 #define adding2q (G.adding2q )
387 #define lmc_len (G.lmc_len )
389 #define ioq_start (G.ioq_start )
390 #define my_pid (G.my_pid )
391 #define last_search_pattern (G.last_search_pattern)
393 #define edit_file__cur_line (G.edit_file__cur_line)
394 #define refresh__old_offset (G.refresh__old_offset)
395 #define format_edit_status__tot (G.format_edit_status__tot)
397 #define YDreg (G.YDreg )
398 #define Ureg (G.Ureg )
399 #define mark (G.mark )
400 #define context_start (G.context_start )
401 #define context_end (G.context_end )
402 #define restart (G.restart )
403 #define term_orig (G.term_orig )
404 #define term_vi (G.term_vi )
405 #define initial_cmds (G.initial_cmds )
406 #define readbuffer (G.readbuffer )
407 #define scr_out_buf (G.scr_out_buf )
408 #define last_modifying_cmd (G.last_modifying_cmd )
409 #define get_input_line__buf (G.get_input_line__buf)
411 #define INIT_G() do { \
412 SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \
413 last_file_modified = -1; \
414 /* "" but has space for 2 chars: */ \
415 IF_FEATURE_VI_SEARCH(last_search_pattern = xzalloc(2);) \
419 static int init_text_buffer(char *); // init from file or create new
420 static void edit_file(char *); // edit one file
421 static void do_cmd(int); // execute a command
422 static int next_tabstop(int);
423 static void sync_cursor(char *, int *, int *); // synchronize the screen cursor to dot
424 static char *begin_line(char *); // return pointer to cur line B-o-l
425 static char *end_line(char *); // return pointer to cur line E-o-l
426 static char *prev_line(char *); // return pointer to prev line B-o-l
427 static char *next_line(char *); // return pointer to next line B-o-l
428 static char *end_screen(void); // get pointer to last char on screen
429 static int count_lines(char *, char *); // count line from start to stop
430 static char *find_line(int); // find begining of line #li
431 static char *move_to_col(char *, int); // move "p" to column l
432 static void dot_left(void); // move dot left- dont leave line
433 static void dot_right(void); // move dot right- dont leave line
434 static void dot_begin(void); // move dot to B-o-l
435 static void dot_end(void); // move dot to E-o-l
436 static void dot_next(void); // move dot to next line B-o-l
437 static void dot_prev(void); // move dot to prev line B-o-l
438 static void dot_scroll(int, int); // move the screen up or down
439 static void dot_skip_over_ws(void); // move dot pat WS
440 static void dot_delete(void); // delete the char at 'dot'
441 static char *bound_dot(char *); // make sure text[0] <= P < "end"
442 static char *new_screen(int, int); // malloc virtual screen memory
443 static char *char_insert(char *, char); // insert the char c at 'p'
444 // might reallocate text[]! use p += stupid_insert(p, ...),
445 // and be careful to not use pointers into potentially freed text[]!
446 static uintptr_t stupid_insert(char *, char); // stupidly insert the char c at 'p'
447 static int find_range(char **, char **, char); // return pointers for an object
448 static int st_test(char *, int, int, char *); // helper for skip_thing()
449 static char *skip_thing(char *, int, int, int); // skip some object
450 static char *find_pair(char *, char); // find matching pair () [] {}
451 static char *text_hole_delete(char *, char *); // at "p", delete a 'size' byte hole
452 // might reallocate text[]! use p += text_hole_make(p, ...),
453 // and be careful to not use pointers into potentially freed text[]!
454 static uintptr_t text_hole_make(char *, int); // at "p", make a 'size' byte hole
455 static char *yank_delete(char *, char *, int, int); // yank text[] into register then delete
456 static void show_help(void); // display some help info
457 static void rawmode(void); // set "raw" mode on tty
458 static void cookmode(void); // return to "cooked" mode on tty
459 // sleep for 'h' 1/100 seconds, return 1/0 if stdin is (ready for read)/(not ready)
460 static int mysleep(int);
461 static int readit(void); // read (maybe cursor) key from stdin
462 static int get_one_char(void); // read 1 char from stdin
463 static int file_size(const char *); // what is the byte size of "fn"
464 #if !ENABLE_FEATURE_VI_READONLY
465 #define file_insert(fn, p, update_ro_status) file_insert(fn, p)
467 // file_insert might reallocate text[]!
468 static int file_insert(const char *, char *, int);
469 static int file_write(char *, char *, char *);
470 static void place_cursor(int, int);
471 static void screen_erase(void);
472 static void clear_to_eol(void);
473 static void clear_to_eos(void);
474 static void go_bottom_and_clear_to_eol(void);
475 static void standout_start(void); // send "start reverse video" sequence
476 static void standout_end(void); // send "end reverse video" sequence
477 static void flash(int); // flash the terminal screen
478 static void show_status_line(void); // put a message on the bottom line
479 static void status_line(const char *, ...); // print to status buf
480 static void status_line_bold(const char *, ...);
481 static void status_line_bold_errno(const char *fn);
482 static void not_implemented(const char *); // display "Not implemented" message
483 static int format_edit_status(void); // format file status on status line
484 static void redraw(int); // force a full screen refresh
485 static char* format_line(char* /*, int*/);
486 static void refresh(int); // update the terminal from screen[]
488 static void Indicate_Error(void); // use flash or beep to indicate error
489 #define indicate_error(c) Indicate_Error()
490 static void Hit_Return(void);
492 #if ENABLE_FEATURE_VI_SEARCH
493 static char *char_search(char *, const char *, int, int); // search for pattern starting at p
495 #if ENABLE_FEATURE_VI_COLON
496 static char *get_one_address(char *, int *); // get colon addr, if present
497 static char *get_address(char *, int *, int *); // get two colon addrs, if present
498 static void colon(char *); // execute the "colon" mode cmds
500 #if ENABLE_FEATURE_VI_USE_SIGNALS
501 static void winch_sig(int); // catch window size changes
502 static void suspend_sig(int); // catch ctrl-Z
503 static void catch_sig(int); // catch ctrl-C and alarm time-outs
505 #if ENABLE_FEATURE_VI_DOT_CMD
506 static void start_new_cmd_q(char); // new queue for command
507 static void end_cmd_q(void); // stop saving input chars
509 #define end_cmd_q() ((void)0)
511 #if ENABLE_FEATURE_VI_SETOPTS
512 static void showmatching(char *); // show the matching pair () [] {}
514 #if ENABLE_FEATURE_VI_YANKMARK || (ENABLE_FEATURE_VI_COLON && ENABLE_FEATURE_VI_SEARCH) || ENABLE_FEATURE_VI_CRASHME
515 // might reallocate text[]! use p += string_insert(p, ...),
516 // and be careful to not use pointers into potentially freed text[]!
517 static uintptr_t string_insert(char *, const char *); // insert the string at 'p'
519 #if ENABLE_FEATURE_VI_YANKMARK
520 static char *text_yank(char *, char *, int); // save copy of "p" into a register
521 static char what_reg(void); // what is letter of current YDreg
522 static void check_context(char); // remember context for '' command
524 #if ENABLE_FEATURE_VI_CRASHME
525 static void crash_dummy();
526 static void crash_test();
527 static int crashme = 0;
531 static void write1(const char *out)
536 int vi_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
537 int vi_main(int argc, char **argv)
543 #if ENABLE_FEATURE_VI_USE_SIGNALS || ENABLE_FEATURE_VI_CRASHME
546 #if ENABLE_FEATURE_VI_CRASHME
547 srand((long) my_pid);
549 #ifdef NO_SUCH_APPLET_YET
550 /* If we aren't "vi", we are "view" */
551 if (ENABLE_FEATURE_VI_READONLY && applet_name[2]) {
552 SET_READONLY_MODE(readonly_mode);
556 // autoindent is not default in vim 7.3
557 vi_setops = /*VI_AUTOINDENT |*/ VI_SHOWMATCH | VI_IGNORECASE;
558 // 1- process $HOME/.exrc file (not inplemented yet)
559 // 2- process EXINIT variable from environment
560 // 3- process command line args
561 #if ENABLE_FEATURE_VI_COLON
563 char *p = getenv("EXINIT");
565 initial_cmds[0] = xstrndup(p, MAX_INPUT_LEN);
568 while ((c = getopt(argc, argv, "hCRH" IF_FEATURE_VI_COLON("c:"))) != -1) {
570 #if ENABLE_FEATURE_VI_CRASHME
575 #if ENABLE_FEATURE_VI_READONLY
576 case 'R': // Read-only flag
577 SET_READONLY_MODE(readonly_mode);
580 #if ENABLE_FEATURE_VI_COLON
581 case 'c': // cmd line vi command
583 initial_cmds[initial_cmds[0] != NULL] = xstrndup(optarg, MAX_INPUT_LEN);
595 // The argv array can be used by the ":next" and ":rewind" commands
599 //----- This is the main file handling loop --------------
602 // "Save cursor, use alternate screen buffer, clear screen"
603 write1("\033[?1049h");
605 edit_file(argv[optind]); /* param might be NULL */
606 if (++optind >= argc)
609 // "Use normal screen buffer, restore cursor"
610 write1("\033[?1049l");
611 //-----------------------------------------------------------
616 /* read text from file or create an empty buf */
617 /* will also update current_filename */
618 static int init_text_buffer(char *fn)
621 int size = file_size(fn); // file size. -1 means does not exist.
623 /* allocate/reallocate text buffer */
625 text_size = size + 10240;
626 screenbegin = dot = end = text = xzalloc(text_size);
628 if (fn != current_filename) {
629 free(current_filename);
630 current_filename = xstrdup(fn);
633 // file dont exist. Start empty buf with dummy line
634 char_insert(text, '\n');
637 rc = file_insert(fn, text, 1);
640 last_file_modified = -1;
641 #if ENABLE_FEATURE_VI_YANKMARK
642 /* init the marks. */
643 memset(mark, 0, sizeof(mark));
648 #if ENABLE_FEATURE_VI_WIN_RESIZE
649 static int query_screen_dimensions(void)
651 int err = get_terminal_width_height(STDIN_FILENO, &columns, &rows);
652 if (rows > MAX_SCR_ROWS)
654 if (columns > MAX_SCR_COLS)
655 columns = MAX_SCR_COLS;
659 # define query_screen_dimensions() (0)
662 static void edit_file(char *fn)
664 #if ENABLE_FEATURE_VI_YANKMARK
665 #define cur_line edit_file__cur_line
668 #if ENABLE_FEATURE_VI_USE_SIGNALS
672 editing = 1; // 0 = exit, 1 = one file, 2 = multiple files
676 IF_FEATURE_VI_ASK_TERMINAL(G.get_rowcol_error =) query_screen_dimensions();
677 #if ENABLE_FEATURE_VI_ASK_TERMINAL
678 if (G.get_rowcol_error /* TODO? && no input on stdin */) {
680 write1("\033[999;999H" "\033[6n");
682 k = read_key(STDIN_FILENO, readbuffer, /*timeout_ms:*/ 100);
683 if ((int32_t)k == KEYCODE_CURSOR_POS) {
684 uint32_t rc = (k >> 32);
685 columns = (rc & 0x7fff);
686 if (columns > MAX_SCR_COLS)
687 columns = MAX_SCR_COLS;
688 rows = ((rc >> 16) & 0x7fff);
689 if (rows > MAX_SCR_ROWS)
694 new_screen(rows, columns); // get memory for virtual screen
695 init_text_buffer(fn);
697 #if ENABLE_FEATURE_VI_YANKMARK
698 YDreg = 26; // default Yank/Delete reg
699 Ureg = 27; // hold orig line for "U" cmd
700 mark[26] = mark[27] = text; // init "previous context"
703 last_forward_char = last_input_char = '\0';
707 #if ENABLE_FEATURE_VI_USE_SIGNALS
708 signal(SIGINT, catch_sig);
709 signal(SIGWINCH, winch_sig);
710 signal(SIGTSTP, suspend_sig);
711 sig = sigsetjmp(restart, 1);
713 screenbegin = dot = text;
717 cmd_mode = 0; // 0=command 1=insert 2='R'eplace
720 offset = 0; // no horizontal offset
722 #if ENABLE_FEATURE_VI_DOT_CMD
724 ioq = ioq_start = NULL;
729 #if ENABLE_FEATURE_VI_COLON
734 while ((p = initial_cmds[n]) != NULL) {
744 free(initial_cmds[n]);
745 initial_cmds[n] = NULL;
750 redraw(FALSE); // dont force every col re-draw
751 //------This is the main Vi cmd handling loop -----------------------
752 while (editing > 0) {
753 #if ENABLE_FEATURE_VI_CRASHME
755 if ((end - text) > 1) {
756 crash_dummy(); // generate a random command
759 string_insert(text, "\n\n##### Ran out of text to work on. #####\n\n"); // insert the string
765 last_input_char = c = get_one_char(); // get a cmd from user
766 #if ENABLE_FEATURE_VI_YANKMARK
767 // save a copy of the current line- for the 'U" command
768 if (begin_line(dot) != cur_line) {
769 cur_line = begin_line(dot);
770 text_yank(begin_line(dot), end_line(dot), Ureg);
773 #if ENABLE_FEATURE_VI_DOT_CMD
774 // These are commands that change text[].
775 // Remember the input for the "." command
776 if (!adding2q && ioq_start == NULL
777 && cmd_mode == 0 // command mode
778 && c > '\0' // exclude NUL and non-ASCII chars
779 && c < 0x7f // (Unicode and such)
780 && strchr(modifying_cmds, c)
785 do_cmd(c); // execute the user command
787 // poll to see if there is input already waiting. if we are
788 // not able to display output fast enough to keep up, skip
789 // the display update until we catch up with input.
790 if (!readbuffer[0] && mysleep(0) == 0) {
791 // no input pending - so update output
795 #if ENABLE_FEATURE_VI_CRASHME
797 crash_test(); // test editor variables
800 //-------------------------------------------------------------------
802 go_bottom_and_clear_to_eol();
807 //----- The Colon commands -------------------------------------
808 #if ENABLE_FEATURE_VI_COLON
809 static char *get_one_address(char *p, int *addr) // get colon addr, if present
813 IF_FEATURE_VI_YANKMARK(char c;)
814 IF_FEATURE_VI_SEARCH(char *pat;)
816 *addr = -1; // assume no addr
817 if (*p == '.') { // the current line
820 *addr = count_lines(text, q);
822 #if ENABLE_FEATURE_VI_YANKMARK
823 else if (*p == '\'') { // is this a mark addr
827 if (c >= 'a' && c <= 'z') {
830 q = mark[(unsigned char) c];
831 if (q != NULL) { // is mark valid
832 *addr = count_lines(text, q);
837 #if ENABLE_FEATURE_VI_SEARCH
838 else if (*p == '/') { // a search pattern
839 q = strchrnul(++p, '/');
840 pat = xstrndup(p, q - p); // save copy of pattern
844 q = char_search(dot, pat, FORWARD, FULL);
846 *addr = count_lines(text, q);
851 else if (*p == '$') { // the last line in file
853 q = begin_line(end - 1);
854 *addr = count_lines(text, q);
855 } else if (isdigit(*p)) { // specific line number
856 sscanf(p, "%d%n", addr, &st);
859 // unrecognized address - assume -1
865 static char *get_address(char *p, int *b, int *e) // get two colon addrs, if present
867 //----- get the address' i.e., 1,3 'a,'b -----
868 // get FIRST addr, if present
870 p++; // skip over leading spaces
871 if (*p == '%') { // alias for 1,$
874 *e = count_lines(text, end-1);
877 p = get_one_address(p, b);
880 if (*p == ',') { // is there a address separator
884 // get SECOND addr, if present
885 p = get_one_address(p, e);
889 p++; // skip over trailing spaces
893 #if ENABLE_FEATURE_VI_SET && ENABLE_FEATURE_VI_SETOPTS
894 static void setops(const char *args, const char *opname, int flg_no,
895 const char *short_opname, int opt)
897 const char *a = args + flg_no;
898 int l = strlen(opname) - 1; /* opname have + ' ' */
900 // maybe strncmp? we had tons of erroneous strncasecmp's...
901 if (strncasecmp(a, opname, l) == 0
902 || strncasecmp(a, short_opname, 2) == 0
912 // buf must be no longer than MAX_INPUT_LEN!
913 static void colon(char *buf)
915 char c, *orig_buf, *buf1, *q, *r;
916 char *fn, cmd[MAX_INPUT_LEN], args[MAX_INPUT_LEN];
917 int i, l, li, ch, b, e;
918 int useforce, forced = FALSE;
920 // :3154 // if (-e line 3154) goto it else stay put
921 // :4,33w! foo // write a portion of buffer to file "foo"
922 // :w // write all of buffer to current file
924 // :q! // quit- dont care about modified file
925 // :'a,'z!sort -u // filter block through sort
926 // :'f // goto mark "f"
927 // :'fl // list literal the mark "f" line
928 // :.r bar // read file "bar" into buffer before dot
929 // :/123/,/abc/d // delete lines from "123" line to "abc" line
930 // :/xyz/ // goto the "xyz" line
931 // :s/find/replace/ // substitute pattern "find" with "replace"
932 // :!<cmd> // run <cmd> then return
938 buf++; // move past the ':'
942 q = text; // assume 1,$ for the range
944 li = count_lines(text, end - 1);
945 fn = current_filename;
947 // look for optional address(es) :. :1 :1,9 :'q,'a :%
948 buf = get_address(buf, &b, &e);
950 // remember orig command line
953 // get the COMMAND into cmd[]
955 while (*buf != '\0') {
962 while (isblank(*buf))
966 buf1 = last_char_is(cmd, '!');
969 *buf1 = '\0'; // get rid of !
972 // if there is only one addr, then the addr
973 // is the line number of the single line the
974 // user wants. So, reset the end
975 // pointer to point at end of the "b" line
976 q = find_line(b); // what line is #b
981 // we were given two addrs. change the
982 // end pointer to the addr given by user.
983 r = find_line(e); // what line is #e
987 // ------------ now look for the command ------------
989 if (i == 0) { // :123CR goto line #123
991 dot = find_line(b); // what line is #b
995 #if ENABLE_FEATURE_ALLOW_EXEC
996 else if (cmd[0] == '!') { // run a cmd
998 // :!ls run the <cmd>
999 go_bottom_and_clear_to_eol();
1001 retcode = system(orig_buf + 1); // run the cmd
1003 printf("\nshell returned %i\n\n", retcode);
1005 Hit_Return(); // let user see results
1008 else if (cmd[0] == '=' && !cmd[1]) { // where is the address
1009 if (b < 0) { // no addr given- use defaults
1010 b = e = count_lines(text, dot);
1012 status_line("%d", b);
1013 } else if (strncmp(cmd, "delete", i) == 0) { // delete lines
1014 if (b < 0) { // no addr given- use defaults
1015 q = begin_line(dot); // assume .,. for the range
1018 dot = yank_delete(q, r, 1, YANKDEL); // save, then delete lines
1020 } else if (strncmp(cmd, "edit", i) == 0) { // Edit a file
1021 // don't edit, if the current file has been modified
1022 if (file_modified && !useforce) {
1023 status_line_bold("No write since last change (:%s! overrides)", cmd);
1027 // the user supplied a file name
1029 } else if (current_filename && current_filename[0]) {
1030 // no user supplied name- use the current filename
1031 // fn = current_filename; was set by default
1033 // no user file name, no current name- punt
1034 status_line_bold("No current filename");
1038 if (init_text_buffer(fn) < 0)
1041 #if ENABLE_FEATURE_VI_YANKMARK
1042 if (Ureg >= 0 && Ureg < 28) {
1043 free(reg[Ureg]); // free orig line reg- for 'U'
1046 if (YDreg >= 0 && YDreg < 28) {
1047 free(reg[YDreg]); // free default yank/delete register
1051 // how many lines in text[]?
1052 li = count_lines(text, end - 1);
1053 status_line("'%s'%s"
1054 IF_FEATURE_VI_READONLY("%s")
1055 " %dL, %dC", current_filename,
1056 (file_size(fn) < 0 ? " [New file]" : ""),
1057 IF_FEATURE_VI_READONLY(
1058 ((readonly_mode) ? " [Readonly]" : ""),
1061 } else if (strncmp(cmd, "file", i) == 0) { // what File is this
1062 if (b != -1 || e != -1) {
1063 status_line_bold("No address allowed on this command");
1067 // user wants a new filename
1068 free(current_filename);
1069 current_filename = xstrdup(args);
1071 // user wants file status info
1072 last_status_cksum = 0; // force status update
1074 } else if (strncmp(cmd, "features", i) == 0) { // what features are available
1075 // print out values of all features
1076 go_bottom_and_clear_to_eol();
1081 } else if (strncmp(cmd, "list", i) == 0) { // literal print line
1082 if (b < 0) { // no addr given- use defaults
1083 q = begin_line(dot); // assume .,. for the range
1086 go_bottom_and_clear_to_eol();
1088 for (; q <= r; q++) {
1092 c_is_no_print = (c & 0x80) && !Isprint(c);
1093 if (c_is_no_print) {
1099 } else if (c < ' ' || c == 127) {
1111 } else if (strncmp(cmd, "quit", i) == 0 // quit
1112 || strncmp(cmd, "next", i) == 0 // edit next file
1113 || strncmp(cmd, "prev", i) == 0 // edit previous file
1118 // force end of argv list
1124 // don't exit if the file been modified
1125 if (file_modified) {
1126 status_line_bold("No write since last change (:%s! overrides)", cmd);
1129 // are there other file to edit
1130 n = save_argc - optind - 1;
1131 if (*cmd == 'q' && n > 0) {
1132 status_line_bold("%d more file(s) to edit", n);
1135 if (*cmd == 'n' && n <= 0) {
1136 status_line_bold("No more files to edit");
1140 // are there previous files to edit
1142 status_line_bold("No previous files to edit");
1148 } else if (strncmp(cmd, "read", i) == 0) { // read file into text[]
1151 status_line_bold("No filename given");
1154 if (b < 0) { // no addr given- use defaults
1155 q = begin_line(dot); // assume "dot"
1157 // read after current line- unless user said ":0r foo"
1160 { // dance around potentially-reallocated text[]
1161 uintptr_t ofs = q - text;
1162 ch = file_insert(fn, q, 0);
1166 goto ret; // nothing was inserted
1167 // how many lines in text[]?
1168 li = count_lines(q, q + ch - 1);
1170 IF_FEATURE_VI_READONLY("%s")
1172 IF_FEATURE_VI_READONLY((readonly_mode ? " [Readonly]" : ""),)
1175 // if the insert is before "dot" then we need to update
1178 /*file_modified++; - done by file_insert */
1180 } else if (strncmp(cmd, "rewind", i) == 0) { // rewind cmd line args
1181 if (file_modified && !useforce) {
1182 status_line_bold("No write since last change (:%s! overrides)", cmd);
1184 // reset the filenames to edit
1185 optind = -1; /* start from 0th file */
1188 #if ENABLE_FEATURE_VI_SET
1189 } else if (strncmp(cmd, "set", i) == 0) { // set or clear features
1190 #if ENABLE_FEATURE_VI_SETOPTS
1193 i = 0; // offset into args
1194 // only blank is regarded as args delimiter. What about tab '\t'?
1195 if (!args[0] || strcasecmp(args, "all") == 0) {
1196 // print out values of all options
1197 #if ENABLE_FEATURE_VI_SETOPTS
1204 autoindent ? "" : "no",
1205 err_method ? "" : "no",
1206 ignorecase ? "" : "no",
1207 showmatch ? "" : "no",
1213 #if ENABLE_FEATURE_VI_SETOPTS
1216 if (strncmp(argp, "no", 2) == 0)
1217 i = 2; // ":set noautoindent"
1218 setops(argp, "autoindent ", i, "ai", VI_AUTOINDENT);
1219 setops(argp, "flash " , i, "fl", VI_ERR_METHOD);
1220 setops(argp, "ignorecase ", i, "ic", VI_IGNORECASE);
1221 setops(argp, "showmatch " , i, "sm", VI_SHOWMATCH );
1222 if (strncmp(argp + i, "tabstop=", 8) == 0) {
1224 sscanf(argp + i+8, "%u", &t);
1225 if (t > 0 && t <= MAX_TABSTOP)
1228 argp = skip_non_whitespace(argp);
1229 argp = skip_whitespace(argp);
1231 #endif /* FEATURE_VI_SETOPTS */
1232 #endif /* FEATURE_VI_SET */
1233 #if ENABLE_FEATURE_VI_SEARCH
1234 } else if (cmd[0] == 's') { // substitute a pattern with a replacement pattern
1235 char *F, *R, *flags;
1236 size_t len_F, len_R;
1237 int gflag; // global replace flag
1239 // F points to the "find" pattern
1240 // R points to the "replace" pattern
1241 // replace the cmd line delimiters "/" with NULs
1242 c = orig_buf[1]; // what is the delimiter
1243 F = orig_buf + 2; // start of "find"
1244 R = strchr(F, c); // middle delimiter
1248 *R++ = '\0'; // terminate "find"
1249 flags = strchr(R, c);
1253 *flags++ = '\0'; // terminate "replace"
1257 if (b < 0) { // maybe :s/foo/bar/
1258 q = begin_line(dot); // start with cur line
1259 b = count_lines(text, q); // cur line number
1262 e = b; // maybe :.s/foo/bar/
1264 for (i = b; i <= e; i++) { // so, :20,23 s \0 find \0 replace \0
1265 char *ls = q; // orig line start
1268 found = char_search(q, F, FORWARD, LIMITED); // search cur line only for "find"
1271 // we found the "find" pattern - delete it
1272 text_hole_delete(found, found + len_F - 1);
1273 // inset the "replace" patern
1274 bias = string_insert(found, R); // insert the string
1277 /*q += bias; - recalculated anyway */
1278 // check for "global" :s/foo/bar/g
1280 if ((found + len_R) < end_line(ls)) {
1282 goto vc4; // don't let q move past cur line
1288 #endif /* FEATURE_VI_SEARCH */
1289 } else if (strncmp(cmd, "version", i) == 0) { // show software version
1290 status_line(BB_VER " " BB_BT);
1291 } else if (strncmp(cmd, "write", i) == 0 // write text to file
1292 || strncmp(cmd, "wq", i) == 0
1293 || strncmp(cmd, "wn", i) == 0
1294 || (cmd[0] == 'x' && !cmd[1])
1296 // is there a file name to write to?
1300 #if ENABLE_FEATURE_VI_READONLY
1301 if (readonly_mode && !useforce) {
1302 status_line_bold("'%s' is read only", fn);
1306 // how many lines in text[]?
1307 li = count_lines(q, r);
1309 // see if file exists- if not, its just a new file request
1311 // if "fn" is not write-able, chmod u+w
1312 // sprintf(syscmd, "chmod u+w %s", fn);
1316 l = file_write(fn, q, r);
1317 if (useforce && forced) {
1319 // sprintf(syscmd, "chmod u-w %s", fn);
1325 status_line_bold_errno(fn);
1327 status_line("'%s' %dL, %dC", fn, li, l);
1328 if (q == text && r == end - 1 && l == ch) {
1330 last_file_modified = -1;
1332 if ((cmd[0] == 'x' || cmd[1] == 'q' || cmd[1] == 'n'
1333 || cmd[0] == 'X' || cmd[1] == 'Q' || cmd[1] == 'N'
1340 #if ENABLE_FEATURE_VI_YANKMARK
1341 } else if (strncmp(cmd, "yank", i) == 0) { // yank lines
1342 if (b < 0) { // no addr given- use defaults
1343 q = begin_line(dot); // assume .,. for the range
1346 text_yank(q, r, YDreg);
1347 li = count_lines(q, r);
1348 status_line("Yank %d lines (%d chars) into [%c]",
1349 li, strlen(reg[YDreg]), what_reg());
1353 not_implemented(cmd);
1356 dot = bound_dot(dot); // make sure "dot" is valid
1358 #if ENABLE_FEATURE_VI_SEARCH
1360 status_line(":s expression missing delimiters");
1364 #endif /* FEATURE_VI_COLON */
1366 static void Hit_Return(void)
1371 write1("[Hit return to continue]");
1373 while ((c = get_one_char()) != '\n' && c != '\r')
1375 redraw(TRUE); // force redraw all
1378 static int next_tabstop(int col)
1380 return col + ((tabstop - 1) - (col % tabstop));
1383 //----- Synchronize the cursor to Dot --------------------------
1384 static NOINLINE void sync_cursor(char *d, int *row, int *col)
1386 char *beg_cur; // begin and end of "d" line
1390 beg_cur = begin_line(d); // first char of cur line
1392 if (beg_cur < screenbegin) {
1393 // "d" is before top line on screen
1394 // how many lines do we have to move
1395 cnt = count_lines(beg_cur, screenbegin);
1397 screenbegin = beg_cur;
1398 if (cnt > (rows - 1) / 2) {
1399 // we moved too many lines. put "dot" in middle of screen
1400 for (cnt = 0; cnt < (rows - 1) / 2; cnt++) {
1401 screenbegin = prev_line(screenbegin);
1405 char *end_scr; // begin and end of screen
1406 end_scr = end_screen(); // last char of screen
1407 if (beg_cur > end_scr) {
1408 // "d" is after bottom line on screen
1409 // how many lines do we have to move
1410 cnt = count_lines(end_scr, beg_cur);
1411 if (cnt > (rows - 1) / 2)
1412 goto sc1; // too many lines
1413 for (ro = 0; ro < cnt - 1; ro++) {
1414 // move screen begin the same amount
1415 screenbegin = next_line(screenbegin);
1416 // now, move the end of screen
1417 end_scr = next_line(end_scr);
1418 end_scr = end_line(end_scr);
1422 // "d" is on screen- find out which row
1424 for (ro = 0; ro < rows - 1; ro++) { // drive "ro" to correct row
1430 // find out what col "d" is on
1432 while (tp < d) { // drive "co" to correct column
1433 if (*tp == '\n') //vda || *tp == '\0')
1436 // handle tabs like real vi
1437 if (d == tp && cmd_mode) {
1440 co = next_tabstop(co);
1441 } else if ((unsigned char)*tp < ' ' || *tp == 0x7f) {
1442 co++; // display as ^X, use 2 columns
1448 // "co" is the column where "dot" is.
1449 // The screen has "columns" columns.
1450 // The currently displayed columns are 0+offset -- columns+ofset
1451 // |-------------------------------------------------------------|
1453 // offset | |------- columns ----------------|
1455 // If "co" is already in this range then we do not have to adjust offset
1456 // but, we do have to subtract the "offset" bias from "co".
1457 // If "co" is outside this range then we have to change "offset".
1458 // If the first char of a line is a tab the cursor will try to stay
1459 // in column 7, but we have to set offset to 0.
1461 if (co < 0 + offset) {
1464 if (co >= columns + offset) {
1465 offset = co - columns + 1;
1467 // if the first char of the line is a tab, and "dot" is sitting on it
1468 // force offset to 0.
1469 if (d == beg_cur && *d == '\t') {
1478 //----- Text Movement Routines ---------------------------------
1479 static char *begin_line(char *p) // return pointer to first char cur line
1482 p = memrchr(text, '\n', p - text);
1490 static char *end_line(char *p) // return pointer to NL of cur line
1493 p = memchr(p, '\n', end - p - 1);
1500 static char *dollar_line(char *p) // return pointer to just before NL line
1503 // Try to stay off of the Newline
1504 if (*p == '\n' && (p - begin_line(p)) > 0)
1509 static char *prev_line(char *p) // return pointer first char prev line
1511 p = begin_line(p); // goto begining of cur line
1512 if (p > text && p[-1] == '\n')
1513 p--; // step to prev line
1514 p = begin_line(p); // goto begining of prev line
1518 static char *next_line(char *p) // return pointer first char next line
1521 if (p < end - 1 && *p == '\n')
1522 p++; // step to next line
1526 //----- Text Information Routines ------------------------------
1527 static char *end_screen(void)
1532 // find new bottom line
1534 for (cnt = 0; cnt < rows - 2; cnt++)
1540 // count line from start to stop
1541 static int count_lines(char *start, char *stop)
1546 if (stop < start) { // start and stop are backwards- reverse them
1552 stop = end_line(stop);
1553 while (start <= stop && start <= end - 1) {
1554 start = end_line(start);
1562 static char *find_line(int li) // find begining of line #li
1566 for (q = text; li > 1; li--) {
1572 //----- Dot Movement Routines ----------------------------------
1573 static void dot_left(void)
1575 if (dot > text && dot[-1] != '\n')
1579 static void dot_right(void)
1581 if (dot < end - 1 && *dot != '\n')
1585 static void dot_begin(void)
1587 dot = begin_line(dot); // return pointer to first char cur line
1590 static void dot_end(void)
1592 dot = end_line(dot); // return pointer to last char cur line
1595 static char *move_to_col(char *p, int l)
1601 while (co < l && p < end) {
1602 if (*p == '\n') //vda || *p == '\0')
1605 co = next_tabstop(co);
1606 } else if (*p < ' ' || *p == 127) {
1607 co++; // display as ^X, use 2 columns
1615 static void dot_next(void)
1617 dot = next_line(dot);
1620 static void dot_prev(void)
1622 dot = prev_line(dot);
1625 static void dot_scroll(int cnt, int dir)
1629 for (; cnt > 0; cnt--) {
1632 // ctrl-Y scroll up one line
1633 screenbegin = prev_line(screenbegin);
1636 // ctrl-E scroll down one line
1637 screenbegin = next_line(screenbegin);
1640 // make sure "dot" stays on the screen so we dont scroll off
1641 if (dot < screenbegin)
1643 q = end_screen(); // find new bottom line
1645 dot = begin_line(q); // is dot is below bottom line?
1649 static void dot_skip_over_ws(void)
1652 while (isspace(*dot) && *dot != '\n' && dot < end - 1)
1656 static void dot_delete(void) // delete the char at 'dot'
1658 text_hole_delete(dot, dot);
1661 static char *bound_dot(char *p) // make sure text[0] <= P < "end"
1663 if (p >= end && end > text) {
1665 indicate_error('1');
1669 indicate_error('2');
1674 //----- Helper Utility Routines --------------------------------
1676 //----------------------------------------------------------------
1677 //----- Char Routines --------------------------------------------
1678 /* Chars that are part of a word-
1679 * 0123456789_ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz
1680 * Chars that are Not part of a word (stoppers)
1681 * !"#$%&'()*+,-./:;<=>?@[\]^`{|}~
1682 * Chars that are WhiteSpace
1683 * TAB NEWLINE VT FF RETURN SPACE
1684 * DO NOT COUNT NEWLINE AS WHITESPACE
1687 static char *new_screen(int ro, int co)
1692 screensize = ro * co + 8;
1693 screen = xmalloc(screensize);
1694 // initialize the new screen. assume this will be a empty file.
1696 // non-existent text[] lines start with a tilde (~).
1697 for (li = 1; li < ro - 1; li++) {
1698 screen[(li * co) + 0] = '~';
1703 #if ENABLE_FEATURE_VI_SEARCH
1705 # if ENABLE_FEATURE_VI_REGEX_SEARCH
1707 // search for pattern starting at p
1708 static char *char_search(char *p, const char *pat, int dir, int range)
1710 struct re_pattern_buffer preg;
1716 re_syntax_options = RE_SYNTAX_POSIX_EXTENDED;
1718 re_syntax_options = RE_SYNTAX_POSIX_EXTENDED | RE_ICASE;
1720 memset(&preg, 0, sizeof(preg));
1721 err = re_compile_pattern(pat, strlen(pat), &preg);
1723 status_line_bold("bad search pattern '%s': %s", pat, err);
1727 // assume a LIMITED forward search
1731 // RANGE could be negative if we are searching backwards
1741 // search for the compiled pattern, preg, in p[]
1742 // range < 0: search backward
1743 // range > 0: search forward
1745 // re_search() < 0: not found or error
1746 // re_search() >= 0: index of found pattern
1747 // struct pattern char int int int struct reg
1748 // re_search(*pattern_buffer, *string, size, start, range, *regs)
1749 i = re_search(&preg, q, size, /*start:*/ 0, range, /*struct re_registers*:*/ NULL);
1762 # if ENABLE_FEATURE_VI_SETOPTS
1763 static int mycmp(const char *s1, const char *s2, int len)
1766 return strncasecmp(s1, s2, len);
1768 return strncmp(s1, s2, len);
1771 # define mycmp strncmp
1774 static char *char_search(char *p, const char *pat, int dir, int range)
1780 if (dir == FORWARD) {
1781 stop = end - 1; // assume range is p..end-1
1782 if (range == LIMITED)
1783 stop = next_line(p); // range is to next line
1784 for (start = p; start < stop; start++) {
1785 if (mycmp(start, pat, len) == 0) {
1789 } else if (dir == BACK) {
1790 stop = text; // assume range is text..p
1791 if (range == LIMITED)
1792 stop = prev_line(p); // range is to prev line
1793 for (start = p - len; start >= stop; start--) {
1794 if (mycmp(start, pat, len) == 0) {
1799 // pattern not found
1805 #endif /* FEATURE_VI_SEARCH */
1807 static char *char_insert(char *p, char c) // insert the char c at 'p'
1809 if (c == 22) { // Is this an ctrl-V?
1810 p += stupid_insert(p, '^'); // use ^ to indicate literal next
1811 refresh(FALSE); // show the ^
1816 } else if (c == 27) { // Is this an ESC?
1819 end_cmd_q(); // stop adding to q
1820 last_status_cksum = 0; // force status update
1821 if ((p[-1] != '\n') && (dot > text)) {
1824 } else if (c == erase_char || c == 8 || c == 127) { // Is this a BS
1826 if ((p[-1] != '\n') && (dot>text)) {
1828 p = text_hole_delete(p, p); // shrink buffer 1 char
1831 #if ENABLE_FEATURE_VI_SETOPTS
1832 // insert a char into text[]
1833 char *sp; // "save p"
1837 c = '\n'; // translate \r to \n
1838 #if ENABLE_FEATURE_VI_SETOPTS
1839 sp = p; // remember addr of insert
1841 p += 1 + stupid_insert(p, c); // insert the char
1842 #if ENABLE_FEATURE_VI_SETOPTS
1843 if (showmatch && strchr(")]}", *sp) != NULL) {
1846 if (autoindent && c == '\n') { // auto indent the new line
1849 q = prev_line(p); // use prev line as template
1850 len = strspn(q, " \t"); // space or tab
1853 bias = text_hole_make(p, len);
1865 // might reallocate text[]! use p += stupid_insert(p, ...),
1866 // and be careful to not use pointers into potentially freed text[]!
1867 static uintptr_t stupid_insert(char *p, char c) // stupidly insert the char c at 'p'
1870 bias = text_hole_make(p, 1);
1873 //file_modified++; - done by text_hole_make()
1877 static int find_range(char **start, char **stop, char c)
1879 char *save_dot, *p, *q, *t;
1880 int cnt, multiline = 0;
1885 if (strchr("cdy><", c)) {
1886 // these cmds operate on whole lines
1887 p = q = begin_line(p);
1888 for (cnt = 1; cnt < cmdcnt; cnt++) {
1892 } else if (strchr("^%$0bBeEfth\b\177", c)) {
1893 // These cmds operate on char positions
1894 do_cmd(c); // execute movement cmd
1896 } else if (strchr("wW", c)) {
1897 do_cmd(c); // execute movement cmd
1898 // if we are at the next word's first char
1899 // step back one char
1900 // but check the possibilities when it is true
1901 if (dot > text && ((isspace(dot[-1]) && !isspace(dot[0]))
1902 || (ispunct(dot[-1]) && !ispunct(dot[0]))
1903 || (isalnum(dot[-1]) && !isalnum(dot[0]))))
1904 dot--; // move back off of next word
1905 if (dot > text && *dot == '\n')
1906 dot--; // stay off NL
1908 } else if (strchr("H-k{", c)) {
1909 // these operate on multi-lines backwards
1910 q = end_line(dot); // find NL
1911 do_cmd(c); // execute movement cmd
1914 } else if (strchr("L+j}\r\n", c)) {
1915 // these operate on multi-lines forwards
1916 p = begin_line(dot);
1917 do_cmd(c); // execute movement cmd
1918 dot_end(); // find NL
1921 // nothing -- this causes any other values of c to
1922 // represent the one-character range under the
1923 // cursor. this is correct for ' ' and 'l', but
1924 // perhaps no others.
1933 // backward char movements don't include start position
1934 if (q > p && strchr("^0bBh\b\177", c)) q--;
1937 for (t = p; t <= q; t++) {
1950 static int st_test(char *p, int type, int dir, char *tested)
1960 if (type == S_BEFORE_WS) {
1962 test = (!isspace(c) || c == '\n');
1964 if (type == S_TO_WS) {
1966 test = (!isspace(c) || c == '\n');
1968 if (type == S_OVER_WS) {
1972 if (type == S_END_PUNCT) {
1976 if (type == S_END_ALNUM) {
1978 test = (isalnum(c) || c == '_');
1984 static char *skip_thing(char *p, int linecnt, int dir, int type)
1988 while (st_test(p, type, dir, &c)) {
1989 // make sure we limit search to correct number of lines
1990 if (c == '\n' && --linecnt < 1)
1992 if (dir >= 0 && p >= end - 1)
1994 if (dir < 0 && p <= text)
1996 p += dir; // move to next char
2001 // find matching char of pair () [] {}
2002 static char *find_pair(char *p, const char c)
2009 dir = 1; // assume forward
2011 case '(': match = ')'; break;
2012 case '[': match = ']'; break;
2013 case '{': match = '}'; break;
2014 case ')': match = '('; dir = -1; break;
2015 case ']': match = '['; dir = -1; break;
2016 case '}': match = '{'; dir = -1; break;
2018 for (q = p + dir; text <= q && q < end; q += dir) {
2019 // look for match, count levels of pairs (( ))
2021 level++; // increase pair levels
2023 level--; // reduce pair level
2025 break; // found matching pair
2028 q = NULL; // indicate no match
2032 #if ENABLE_FEATURE_VI_SETOPTS
2033 // show the matching char of a pair, () [] {}
2034 static void showmatching(char *p)
2038 // we found half of a pair
2039 q = find_pair(p, *p); // get loc of matching char
2041 indicate_error('3'); // no matching char
2043 // "q" now points to matching pair
2044 save_dot = dot; // remember where we are
2045 dot = q; // go to new loc
2046 refresh(FALSE); // let the user see it
2047 mysleep(40); // give user some time
2048 dot = save_dot; // go back to old loc
2052 #endif /* FEATURE_VI_SETOPTS */
2054 // open a hole in text[]
2055 // might reallocate text[]! use p += text_hole_make(p, ...),
2056 // and be careful to not use pointers into potentially freed text[]!
2057 static uintptr_t text_hole_make(char *p, int size) // at "p", make a 'size' byte hole
2063 end += size; // adjust the new END
2064 if (end >= (text + text_size)) {
2066 text_size += end - (text + text_size) + 10240;
2067 new_text = xrealloc(text, text_size);
2068 bias = (new_text - text);
2069 screenbegin += bias;
2073 #if ENABLE_FEATURE_VI_YANKMARK
2076 for (i = 0; i < ARRAY_SIZE(mark); i++)
2083 memmove(p + size, p, end - size - p);
2084 memset(p, ' ', size); // clear new hole
2089 // close a hole in text[]
2090 static char *text_hole_delete(char *p, char *q) // delete "p" through "q", inclusive
2095 // move forwards, from beginning
2099 if (q < p) { // they are backward- swap them
2103 hole_size = q - p + 1;
2105 if (src < text || src > end)
2107 if (dest < text || dest >= end)
2110 goto thd_atend; // just delete the end of the buffer
2111 memmove(dest, src, cnt);
2113 end = end - hole_size; // adjust the new END
2115 dest = end - 1; // make sure dest in below end-1
2117 dest = end = text; // keep pointers valid
2123 // copy text into register, then delete text.
2124 // if dist <= 0, do not include, or go past, a NewLine
2126 static char *yank_delete(char *start, char *stop, int dist, int yf)
2130 // make sure start <= stop
2132 // they are backwards, reverse them
2138 // we cannot cross NL boundaries
2142 // dont go past a NewLine
2143 for (; p + 1 <= stop; p++) {
2145 stop = p; // "stop" just before NewLine
2151 #if ENABLE_FEATURE_VI_YANKMARK
2152 text_yank(start, stop, YDreg);
2154 if (yf == YANKDEL) {
2155 p = text_hole_delete(start, stop);
2160 static void show_help(void)
2162 puts("These features are available:"
2163 #if ENABLE_FEATURE_VI_SEARCH
2164 "\n\tPattern searches with / and ?"
2166 #if ENABLE_FEATURE_VI_DOT_CMD
2167 "\n\tLast command repeat with ."
2169 #if ENABLE_FEATURE_VI_YANKMARK
2170 "\n\tLine marking with 'x"
2171 "\n\tNamed buffers with \"x"
2173 #if ENABLE_FEATURE_VI_READONLY
2174 //not implemented: "\n\tReadonly if vi is called as \"view\""
2175 //redundant: usage text says this too: "\n\tReadonly with -R command line arg"
2177 #if ENABLE_FEATURE_VI_SET
2178 "\n\tSome colon mode commands with :"
2180 #if ENABLE_FEATURE_VI_SETOPTS
2181 "\n\tSettable options with \":set\""
2183 #if ENABLE_FEATURE_VI_USE_SIGNALS
2184 "\n\tSignal catching- ^C"
2185 "\n\tJob suspend and resume with ^Z"
2187 #if ENABLE_FEATURE_VI_WIN_RESIZE
2188 "\n\tAdapt to window re-sizes"
2193 #if ENABLE_FEATURE_VI_DOT_CMD
2194 static void start_new_cmd_q(char c)
2196 // get buffer for new cmd
2197 // if there is a current cmd count put it in the buffer first
2199 lmc_len = sprintf(last_modifying_cmd, "%d%c", cmdcnt, c);
2200 } else { // just save char c onto queue
2201 last_modifying_cmd[0] = c;
2207 static void end_cmd_q(void)
2209 #if ENABLE_FEATURE_VI_YANKMARK
2210 YDreg = 26; // go back to default Yank/Delete reg
2214 #endif /* FEATURE_VI_DOT_CMD */
2216 #if ENABLE_FEATURE_VI_YANKMARK \
2217 || (ENABLE_FEATURE_VI_COLON && ENABLE_FEATURE_VI_SEARCH) \
2218 || ENABLE_FEATURE_VI_CRASHME
2219 // might reallocate text[]! use p += string_insert(p, ...),
2220 // and be careful to not use pointers into potentially freed text[]!
2221 static uintptr_t string_insert(char *p, const char *s) // insert the string at 'p'
2227 bias = text_hole_make(p, i);
2230 #if ENABLE_FEATURE_VI_YANKMARK
2233 for (cnt = 0; *s != '\0'; s++) {
2237 status_line("Put %d lines (%d chars) from [%c]", cnt, i, what_reg());
2244 #if ENABLE_FEATURE_VI_YANKMARK
2245 static char *text_yank(char *p, char *q, int dest) // copy text into a register
2248 if (cnt < 0) { // they are backwards- reverse them
2252 free(reg[dest]); // if already a yank register, free it
2253 reg[dest] = xstrndup(p, cnt + 1);
2257 static char what_reg(void)
2261 c = 'D'; // default to D-reg
2262 if (0 <= YDreg && YDreg <= 25)
2263 c = 'a' + (char) YDreg;
2271 static void check_context(char cmd)
2273 // A context is defined to be "modifying text"
2274 // Any modifying command establishes a new context.
2276 if (dot < context_start || dot > context_end) {
2277 if (strchr(modifying_cmds, cmd) != NULL) {
2278 // we are trying to modify text[]- make this the current context
2279 mark[27] = mark[26]; // move cur to prev
2280 mark[26] = dot; // move local to cur
2281 context_start = prev_line(prev_line(dot));
2282 context_end = next_line(next_line(dot));
2283 //loiter= start_loiter= now;
2288 static char *swap_context(char *p) // goto new context for '' command make this the current context
2292 // the current context is in mark[26]
2293 // the previous context is in mark[27]
2294 // only swap context if other context is valid
2295 if (text <= mark[27] && mark[27] <= end - 1) {
2297 mark[27] = mark[26];
2299 p = mark[26]; // where we are going- previous context
2300 context_start = prev_line(prev_line(prev_line(p)));
2301 context_end = next_line(next_line(next_line(p)));
2305 #endif /* FEATURE_VI_YANKMARK */
2307 //----- Set terminal attributes --------------------------------
2308 static void rawmode(void)
2310 tcgetattr(0, &term_orig);
2311 term_vi = term_orig;
2312 term_vi.c_lflag &= (~ICANON & ~ECHO); // leave ISIG on - allow intr's
2313 term_vi.c_iflag &= (~IXON & ~ICRNL);
2314 term_vi.c_oflag &= (~ONLCR);
2315 term_vi.c_cc[VMIN] = 1;
2316 term_vi.c_cc[VTIME] = 0;
2317 erase_char = term_vi.c_cc[VERASE];
2318 tcsetattr_stdin_TCSANOW(&term_vi);
2321 static void cookmode(void)
2324 tcsetattr_stdin_TCSANOW(&term_orig);
2327 #if ENABLE_FEATURE_VI_USE_SIGNALS
2328 //----- Come here when we get a window resize signal ---------
2329 static void winch_sig(int sig UNUSED_PARAM)
2331 int save_errno = errno;
2332 // FIXME: do it in main loop!!!
2333 signal(SIGWINCH, winch_sig);
2334 query_screen_dimensions();
2335 new_screen(rows, columns); // get memory for virtual screen
2336 redraw(TRUE); // re-draw the screen
2340 //----- Come here when we get a continue signal -------------------
2341 static void cont_sig(int sig UNUSED_PARAM)
2343 int save_errno = errno;
2344 rawmode(); // terminal to "raw"
2345 last_status_cksum = 0; // force status update
2346 redraw(TRUE); // re-draw the screen
2348 signal(SIGTSTP, suspend_sig);
2349 signal(SIGCONT, SIG_DFL);
2350 //kill(my_pid, SIGCONT); // huh? why? we are already "continued"...
2354 //----- Come here when we get a Suspend signal -------------------
2355 static void suspend_sig(int sig UNUSED_PARAM)
2357 int save_errno = errno;
2358 go_bottom_and_clear_to_eol();
2359 cookmode(); // terminal to "cooked"
2361 signal(SIGCONT, cont_sig);
2362 signal(SIGTSTP, SIG_DFL);
2363 kill(my_pid, SIGTSTP);
2367 //----- Come here when we get a signal ---------------------------
2368 static void catch_sig(int sig)
2370 signal(SIGINT, catch_sig);
2371 siglongjmp(restart, sig);
2373 #endif /* FEATURE_VI_USE_SIGNALS */
2375 static int mysleep(int hund) // sleep for 'hund' 1/100 seconds or stdin ready
2377 struct pollfd pfd[1];
2379 pfd[0].fd = STDIN_FILENO;
2380 pfd[0].events = POLLIN;
2381 return safe_poll(pfd, 1, hund*10) > 0;
2384 //----- IO Routines --------------------------------------------
2385 static int readit(void) // read (maybe cursor) key from stdin
2390 c = read_key(STDIN_FILENO, readbuffer, /*timeout off:*/ -2);
2391 if (c == -1) { // EOF/error
2392 go_bottom_and_clear_to_eol();
2393 cookmode(); // terminal to "cooked"
2394 bb_error_msg_and_die("can't read user input");
2399 //----- IO Routines --------------------------------------------
2400 static int get_one_char(void)
2404 #if ENABLE_FEATURE_VI_DOT_CMD
2406 // we are not adding to the q.
2407 // but, we may be reading from a q
2409 // there is no current q, read from STDIN
2410 c = readit(); // get the users input
2412 // there is a queue to get chars from first
2413 // careful with correct sign expansion!
2414 c = (unsigned char)*ioq++;
2416 // the end of the q, read from STDIN
2418 ioq_start = ioq = 0;
2419 c = readit(); // get the users input
2423 // adding STDIN chars to q
2424 c = readit(); // get the users input
2425 if (lmc_len >= MAX_INPUT_LEN - 1) {
2426 status_line_bold("last_modifying_cmd overrun");
2428 // add new char to q
2429 last_modifying_cmd[lmc_len++] = c;
2433 c = readit(); // get the users input
2434 #endif /* FEATURE_VI_DOT_CMD */
2438 // Get input line (uses "status line" area)
2439 static char *get_input_line(const char *prompt)
2441 // char [MAX_INPUT_LEN]
2442 #define buf get_input_line__buf
2447 strcpy(buf, prompt);
2448 last_status_cksum = 0; // force status update
2449 go_bottom_and_clear_to_eol();
2450 write1(prompt); // write out the :, /, or ? prompt
2453 while (i < MAX_INPUT_LEN) {
2455 if (c == '\n' || c == '\r' || c == 27)
2456 break; // this is end of input
2457 if (c == erase_char || c == 8 || c == 127) {
2458 // user wants to erase prev char
2460 write1("\b \b"); // erase char on screen
2461 if (i <= 0) // user backs up before b-o-l, exit
2463 } else if (c > 0 && c < 256) { // exclude Unicode
2464 // (TODO: need to handle Unicode)
2475 static int file_size(const char *fn) // what is the byte size of "fn"
2481 if (fn && stat(fn, &st_buf) == 0) // see if file exists
2482 cnt = (int) st_buf.st_size;
2486 // might reallocate text[]!
2487 static int file_insert(const char *fn, char *p, int update_ro_status)
2491 struct stat statbuf;
2494 if (stat(fn, &statbuf) < 0) {
2495 status_line_bold_errno(fn);
2498 if (!S_ISREG(statbuf.st_mode)) {
2499 // This is not a regular file
2500 status_line_bold("'%s' is not a regular file", fn);
2503 if (p < text || p > end) {
2504 status_line_bold("Trying to insert file outside of memory");
2508 // read file to buffer
2509 fd = open(fn, O_RDONLY);
2511 status_line_bold_errno(fn);
2514 size = (statbuf.st_size < INT_MAX ? (int)statbuf.st_size : INT_MAX);
2515 p += text_hole_make(p, size);
2516 cnt = safe_read(fd, p, size);
2518 status_line_bold_errno(fn);
2519 p = text_hole_delete(p, p + size - 1); // un-do buffer insert
2520 } else if (cnt < size) {
2521 // There was a partial read, shrink unused space text[]
2522 p = text_hole_delete(p + cnt, p + size - 1); // un-do buffer insert
2523 status_line_bold("can't read '%s'", fn);
2529 #if ENABLE_FEATURE_VI_READONLY
2530 if (update_ro_status
2531 && ((access(fn, W_OK) < 0) ||
2532 /* root will always have access()
2533 * so we check fileperms too */
2534 !(statbuf.st_mode & (S_IWUSR | S_IWGRP | S_IWOTH))
2537 SET_READONLY_FILE(readonly_mode);
2543 static int file_write(char *fn, char *first, char *last)
2545 int fd, cnt, charcnt;
2548 status_line_bold("No current filename");
2551 /* By popular request we do not open file with O_TRUNC,
2552 * but instead ftruncate() it _after_ successful write.
2553 * Might reduce amount of data lost on power fail etc.
2555 fd = open(fn, (O_WRONLY | O_CREAT), 0666);
2558 cnt = last - first + 1;
2559 charcnt = full_write(fd, first, cnt);
2560 ftruncate(fd, charcnt);
2561 if (charcnt == cnt) {
2563 //file_modified = FALSE;
2571 //----- Terminal Drawing ---------------------------------------
2572 // The terminal is made up of 'rows' line of 'columns' columns.
2573 // classically this would be 24 x 80.
2574 // screen coordinates
2580 // 23,0 ... 23,79 <- status line
2582 //----- Move the cursor to row x col (count from 0, not 1) -------
2583 static void place_cursor(int row, int col)
2585 char cm1[sizeof(ESC_SET_CURSOR_POS) + sizeof(int)*3 * 2];
2587 if (row < 0) row = 0;
2588 if (row >= rows) row = rows - 1;
2589 if (col < 0) col = 0;
2590 if (col >= columns) col = columns - 1;
2592 sprintf(cm1, ESC_SET_CURSOR_POS, row + 1, col + 1);
2596 //----- Erase from cursor to end of line -----------------------
2597 static void clear_to_eol(void)
2599 write1(ESC_CLEAR2EOL);
2602 static void go_bottom_and_clear_to_eol(void)
2604 place_cursor(rows - 1, 0);
2608 //----- Erase from cursor to end of screen -----------------------
2609 static void clear_to_eos(void)
2611 write1(ESC_CLEAR2EOS);
2614 //----- Start standout mode ------------------------------------
2615 static void standout_start(void)
2617 write1(ESC_BOLD_TEXT);
2620 //----- End standout mode --------------------------------------
2621 static void standout_end(void)
2623 write1(ESC_NORM_TEXT);
2626 //----- Flash the screen --------------------------------------
2627 static void flash(int h)
2636 static void Indicate_Error(void)
2638 #if ENABLE_FEATURE_VI_CRASHME
2640 return; // generate a random command
2649 //----- Screen[] Routines --------------------------------------
2650 //----- Erase the Screen[] memory ------------------------------
2651 static void screen_erase(void)
2653 memset(screen, ' ', screensize); // clear new screen
2656 static int bufsum(char *buf, int count)
2659 char *e = buf + count;
2662 sum += (unsigned char) *buf++;
2666 //----- Draw the status line at bottom of the screen -------------
2667 static void show_status_line(void)
2669 int cnt = 0, cksum = 0;
2671 // either we already have an error or status message, or we
2673 if (!have_status_msg) {
2674 cnt = format_edit_status();
2675 cksum = bufsum(status_buffer, cnt);
2677 if (have_status_msg || ((cnt > 0 && last_status_cksum != cksum))) {
2678 last_status_cksum = cksum; // remember if we have seen this line
2679 go_bottom_and_clear_to_eol();
2680 write1(status_buffer);
2681 if (have_status_msg) {
2682 if (((int)strlen(status_buffer) - (have_status_msg - 1)) >
2684 have_status_msg = 0;
2687 have_status_msg = 0;
2689 place_cursor(crow, ccol); // put cursor back in correct place
2694 //----- format the status buffer, the bottom line of screen ------
2695 // format status buffer, with STANDOUT mode
2696 static void status_line_bold(const char *format, ...)
2700 va_start(args, format);
2701 strcpy(status_buffer, ESC_BOLD_TEXT);
2702 vsprintf(status_buffer + sizeof(ESC_BOLD_TEXT)-1, format, args);
2703 strcat(status_buffer, ESC_NORM_TEXT);
2706 have_status_msg = 1 + sizeof(ESC_BOLD_TEXT) + sizeof(ESC_NORM_TEXT) - 2;
2709 static void status_line_bold_errno(const char *fn)
2711 status_line_bold("'%s' %s", fn, strerror(errno));
2714 // format status buffer
2715 static void status_line(const char *format, ...)
2719 va_start(args, format);
2720 vsprintf(status_buffer, format, args);
2723 have_status_msg = 1;
2726 // copy s to buf, convert unprintable
2727 static void print_literal(char *buf, const char *s)
2741 c_is_no_print = (c & 0x80) && !Isprint(c);
2742 if (c_is_no_print) {
2743 strcpy(d, ESC_NORM_TEXT);
2744 d += sizeof(ESC_NORM_TEXT)-1;
2747 if (c < ' ' || c == 0x7f) {
2749 c |= '@'; /* 0x40 */
2755 if (c_is_no_print) {
2756 strcpy(d, ESC_BOLD_TEXT);
2757 d += sizeof(ESC_BOLD_TEXT)-1;
2763 if (d - buf > MAX_INPUT_LEN - 10) // paranoia
2768 static void not_implemented(const char *s)
2770 char buf[MAX_INPUT_LEN];
2772 print_literal(buf, s);
2773 status_line_bold("\'%s\' is not implemented", buf);
2776 // show file status on status line
2777 static int format_edit_status(void)
2779 static const char cmd_mode_indicator[] ALIGN1 = "-IR-";
2781 #define tot format_edit_status__tot
2783 int cur, percent, ret, trunc_at;
2785 // file_modified is now a counter rather than a flag. this
2786 // helps reduce the amount of line counting we need to do.
2787 // (this will cause a mis-reporting of modified status
2788 // once every MAXINT editing operations.)
2790 // it would be nice to do a similar optimization here -- if
2791 // we haven't done a motion that could have changed which line
2792 // we're on, then we shouldn't have to do this count_lines()
2793 cur = count_lines(text, dot);
2795 // reduce counting -- the total lines can't have
2796 // changed if we haven't done any edits.
2797 if (file_modified != last_file_modified) {
2798 tot = cur + count_lines(dot, end - 1) - 1;
2799 last_file_modified = file_modified;
2802 // current line percent
2803 // ------------- ~~ ----------
2806 percent = (100 * cur) / tot;
2812 trunc_at = columns < STATUS_BUFFER_LEN-1 ?
2813 columns : STATUS_BUFFER_LEN-1;
2815 ret = snprintf(status_buffer, trunc_at+1,
2816 #if ENABLE_FEATURE_VI_READONLY
2817 "%c %s%s%s %d/%d %d%%",
2819 "%c %s%s %d/%d %d%%",
2821 cmd_mode_indicator[cmd_mode & 3],
2822 (current_filename != NULL ? current_filename : "No file"),
2823 #if ENABLE_FEATURE_VI_READONLY
2824 (readonly_mode ? " [Readonly]" : ""),
2826 (file_modified ? " [Modified]" : ""),
2829 if (ret >= 0 && ret < trunc_at)
2830 return ret; /* it all fit */
2832 return trunc_at; /* had to truncate */
2836 //----- Force refresh of all Lines -----------------------------
2837 static void redraw(int full_screen)
2841 screen_erase(); // erase the internal screen buffer
2842 last_status_cksum = 0; // force status update
2843 refresh(full_screen); // this will redraw the entire display
2847 //----- Format a text[] line into a buffer ---------------------
2848 static char* format_line(char *src /*, int li*/)
2853 char *dest = scr_out_buf; // [MAX_SCR_COLS + MAX_TABSTOP * 2]
2855 c = '~'; // char in col 0 in non-existent lines is '~'
2857 while (co < columns + tabstop) {
2858 // have we gone past the end?
2863 if ((c & 0x80) && !Isprint(c)) {
2866 if (c < ' ' || c == 0x7f) {
2870 while ((co % tabstop) != (tabstop - 1)) {
2878 c += '@'; // Ctrl-X -> 'X'
2883 // discard scrolled-off-to-the-left portion,
2884 // in tabstop-sized pieces
2885 if (ofs >= tabstop && co >= tabstop) {
2886 memmove(dest, dest + tabstop, co);
2893 // check "short line, gigantic offset" case
2896 // discard last scrolled off part
2899 // fill the rest with spaces
2901 memset(&dest[co], ' ', columns - co);
2905 //----- Refresh the changed screen lines -----------------------
2906 // Copy the source line from text[] into the buffer and note
2907 // if the current screenline is different from the new buffer.
2908 // If they differ then that line needs redrawing on the terminal.
2910 static void refresh(int full_screen)
2912 #define old_offset refresh__old_offset
2915 char *tp, *sp; // pointer into text[] and screen[]
2917 if (ENABLE_FEATURE_VI_WIN_RESIZE IF_FEATURE_VI_ASK_TERMINAL(&& !G.get_rowcol_error) ) {
2918 unsigned c = columns, r = rows;
2919 query_screen_dimensions();
2920 full_screen |= (c - columns) | (r - rows);
2922 sync_cursor(dot, &crow, &ccol); // where cursor will be (on "dot")
2923 tp = screenbegin; // index into text[] of top line
2925 // compare text[] to screen[] and mark screen[] lines that need updating
2926 for (li = 0; li < rows - 1; li++) {
2927 int cs, ce; // column start & end
2929 // format current text line
2930 out_buf = format_line(tp /*, li*/);
2932 // skip to the end of the current text[] line
2934 char *t = memchr(tp, '\n', end - tp);
2935 if (!t) t = end - 1;
2939 // see if there are any changes between vitual screen and out_buf
2940 changed = FALSE; // assume no change
2943 sp = &screen[li * columns]; // start of screen line
2945 // force re-draw of every single column from 0 - columns-1
2948 // compare newly formatted buffer with virtual screen
2949 // look forward for first difference between buf and screen
2950 for (; cs <= ce; cs++) {
2951 if (out_buf[cs] != sp[cs]) {
2952 changed = TRUE; // mark for redraw
2957 // look backward for last difference between out_buf and screen
2958 for (; ce >= cs; ce--) {
2959 if (out_buf[ce] != sp[ce]) {
2960 changed = TRUE; // mark for redraw
2964 // now, cs is index of first diff, and ce is index of last diff
2966 // if horz offset has changed, force a redraw
2967 if (offset != old_offset) {
2972 // make a sanity check of columns indexes
2974 if (ce > columns - 1) ce = columns - 1;
2975 if (cs > ce) { cs = 0; ce = columns - 1; }
2976 // is there a change between vitual screen and out_buf
2978 // copy changed part of buffer to virtual screen
2979 memcpy(sp+cs, out_buf+cs, ce-cs+1);
2980 place_cursor(li, cs);
2981 // write line out to terminal
2982 fwrite(&sp[cs], ce - cs + 1, 1, stdout);
2986 place_cursor(crow, ccol);
2988 old_offset = offset;
2992 //---------------------------------------------------------------------
2993 //----- the Ascii Chart -----------------------------------------------
2995 // 00 nul 01 soh 02 stx 03 etx 04 eot 05 enq 06 ack 07 bel
2996 // 08 bs 09 ht 0a nl 0b vt 0c np 0d cr 0e so 0f si
2997 // 10 dle 11 dc1 12 dc2 13 dc3 14 dc4 15 nak 16 syn 17 etb
2998 // 18 can 19 em 1a sub 1b esc 1c fs 1d gs 1e rs 1f us
2999 // 20 sp 21 ! 22 " 23 # 24 $ 25 % 26 & 27 '
3000 // 28 ( 29 ) 2a * 2b + 2c , 2d - 2e . 2f /
3001 // 30 0 31 1 32 2 33 3 34 4 35 5 36 6 37 7
3002 // 38 8 39 9 3a : 3b ; 3c < 3d = 3e > 3f ?
3003 // 40 @ 41 A 42 B 43 C 44 D 45 E 46 F 47 G
3004 // 48 H 49 I 4a J 4b K 4c L 4d M 4e N 4f O
3005 // 50 P 51 Q 52 R 53 S 54 T 55 U 56 V 57 W
3006 // 58 X 59 Y 5a Z 5b [ 5c \ 5d ] 5e ^ 5f _
3007 // 60 ` 61 a 62 b 63 c 64 d 65 e 66 f 67 g
3008 // 68 h 69 i 6a j 6b k 6c l 6d m 6e n 6f o
3009 // 70 p 71 q 72 r 73 s 74 t 75 u 76 v 77 w
3010 // 78 x 79 y 7a z 7b { 7c | 7d } 7e ~ 7f del
3011 //---------------------------------------------------------------------
3013 //----- Execute a Vi Command -----------------------------------
3014 static void do_cmd(int c)
3016 char *p, *q, *save_dot;
3022 // c1 = c; // quiet the compiler
3023 // cnt = yf = 0; // quiet the compiler
3024 // p = q = save_dot = buf; // quiet the compiler
3025 memset(buf, '\0', sizeof(buf));
3029 /* if this is a cursor key, skip these checks */
3037 case KEYCODE_PAGEUP:
3038 case KEYCODE_PAGEDOWN:
3039 case KEYCODE_DELETE:
3043 if (cmd_mode == 2) {
3044 // flip-flop Insert/Replace mode
3045 if (c == KEYCODE_INSERT)
3047 // we are 'R'eplacing the current *dot with new char
3049 // don't Replace past E-o-l
3050 cmd_mode = 1; // convert to insert
3052 if (1 <= c || Isprint(c)) {
3054 dot = yank_delete(dot, dot, 0, YANKDEL); // delete char
3055 dot = char_insert(dot, c); // insert new char
3060 if (cmd_mode == 1) {
3061 // hitting "Insert" twice means "R" replace mode
3062 if (c == KEYCODE_INSERT) goto dc5;
3063 // insert the char c at "dot"
3064 if (1 <= c || Isprint(c)) {
3065 dot = char_insert(dot, c);
3080 #if ENABLE_FEATURE_VI_CRASHME
3081 case 0x14: // dc4 ctrl-T
3082 crashme = (crashme == 0) ? 1 : 0;
3111 //case 'u': // u- FIXME- there is no undo
3113 default: // unrecognized command
3116 not_implemented(buf);
3117 end_cmd_q(); // stop adding to q
3118 case 0x00: // nul- ignore
3120 case 2: // ctrl-B scroll up full screen
3121 case KEYCODE_PAGEUP: // Cursor Key Page Up
3122 dot_scroll(rows - 2, -1);
3124 case 4: // ctrl-D scroll down half screen
3125 dot_scroll((rows - 2) / 2, 1);
3127 case 5: // ctrl-E scroll down one line
3130 case 6: // ctrl-F scroll down full screen
3131 case KEYCODE_PAGEDOWN: // Cursor Key Page Down
3132 dot_scroll(rows - 2, 1);
3134 case 7: // ctrl-G show current status
3135 last_status_cksum = 0; // force status update
3137 case 'h': // h- move left
3138 case KEYCODE_LEFT: // cursor key Left
3139 case 8: // ctrl-H- move left (This may be ERASE char)
3140 case 0x7f: // DEL- move left (This may be ERASE char)
3143 } while (--cmdcnt > 0);
3145 case 10: // Newline ^J
3146 case 'j': // j- goto next line, same col
3147 case KEYCODE_DOWN: // cursor key Down
3149 dot_next(); // go to next B-o-l
3150 // try stay in same col
3151 dot = move_to_col(dot, ccol + offset);
3152 } while (--cmdcnt > 0);
3154 case 12: // ctrl-L force redraw whole screen
3155 case 18: // ctrl-R force redraw
3158 //mysleep(10); // why???
3159 screen_erase(); // erase the internal screen buffer
3160 last_status_cksum = 0; // force status update
3161 refresh(TRUE); // this will redraw the entire display
3163 case 13: // Carriage Return ^M
3164 case '+': // +- goto next line
3168 } while (--cmdcnt > 0);
3170 case 21: // ctrl-U scroll up half screen
3171 dot_scroll((rows - 2) / 2, -1);
3173 case 25: // ctrl-Y scroll up one line
3179 cmd_mode = 0; // stop insrting
3181 last_status_cksum = 0; // force status update
3183 case ' ': // move right
3184 case 'l': // move right
3185 case KEYCODE_RIGHT: // Cursor Key Right
3188 } while (--cmdcnt > 0);
3190 #if ENABLE_FEATURE_VI_YANKMARK
3191 case '"': // "- name a register to use for Delete/Yank
3192 c1 = (get_one_char() | 0x20) - 'a'; // | 0x20 is tolower()
3193 if ((unsigned)c1 <= 25) { // a-z?
3199 case '\'': // '- goto a specific mark
3200 c1 = (get_one_char() | 0x20) - 'a';
3201 if ((unsigned)c1 <= 25) { // a-z?
3204 if (text <= q && q < end) {
3206 dot_begin(); // go to B-o-l
3209 } else if (c1 == '\'') { // goto previous context
3210 dot = swap_context(dot); // swap current and previous context
3211 dot_begin(); // go to B-o-l
3217 case 'm': // m- Mark a line
3218 // this is really stupid. If there are any inserts or deletes
3219 // between text[0] and dot then this mark will not point to the
3220 // correct location! It could be off by many lines!
3221 // Well..., at least its quick and dirty.
3222 c1 = (get_one_char() | 0x20) - 'a';
3223 if ((unsigned)c1 <= 25) { // a-z?
3224 // remember the line
3230 case 'P': // P- Put register before
3231 case 'p': // p- put register after
3234 status_line_bold("Nothing in register %c", what_reg());
3237 // are we putting whole lines or strings
3238 if (strchr(p, '\n') != NULL) {
3240 dot_begin(); // putting lines- Put above
3243 // are we putting after very last line?
3244 if (end_line(dot) == (end - 1)) {
3245 dot = end; // force dot to end of text[]
3247 dot_next(); // next line, then put before
3252 dot_right(); // move to right, can move to NL
3254 string_insert(dot, p); // insert the string
3255 end_cmd_q(); // stop adding to q
3257 case 'U': // U- Undo; replace current line with original version
3258 if (reg[Ureg] != NULL) {
3259 p = begin_line(dot);
3261 p = text_hole_delete(p, q); // delete cur line
3262 p += string_insert(p, reg[Ureg]); // insert orig line
3267 #endif /* FEATURE_VI_YANKMARK */
3268 case '$': // $- goto end of line
3269 case KEYCODE_END: // Cursor Key End
3271 dot = end_line(dot);
3277 case '%': // %- find matching char of pair () [] {}
3278 for (q = dot; q < end && *q != '\n'; q++) {
3279 if (strchr("()[]{}", *q) != NULL) {
3280 // we found half of a pair
3281 p = find_pair(q, *q);
3293 case 'f': // f- forward to a user specified char
3294 last_forward_char = get_one_char(); // get the search char
3296 // dont separate these two commands. 'f' depends on ';'
3298 //**** fall through to ... ';'
3299 case ';': // ;- look at rest of line for last forward char
3301 if (last_forward_char == 0)
3304 while (q < end - 1 && *q != '\n' && *q != last_forward_char) {
3307 if (*q == last_forward_char)
3309 } while (--cmdcnt > 0);
3311 case ',': // repeat latest 'f' in opposite direction
3312 if (last_forward_char == 0)
3316 while (q >= text && *q != '\n' && *q != last_forward_char) {
3319 if (q >= text && *q == last_forward_char)
3321 } while (--cmdcnt > 0);
3324 case '-': // -- goto prev line
3328 } while (--cmdcnt > 0);
3330 #if ENABLE_FEATURE_VI_DOT_CMD
3331 case '.': // .- repeat the last modifying command
3332 // Stuff the last_modifying_cmd back into stdin
3333 // and let it be re-executed.
3335 last_modifying_cmd[lmc_len] = 0;
3336 ioq = ioq_start = xstrdup(last_modifying_cmd);
3340 #if ENABLE_FEATURE_VI_SEARCH
3341 case '?': // /- search for a pattern
3342 case '/': // /- search for a pattern
3345 q = get_input_line(buf); // get input line- use "status line"
3346 if (q[0] && !q[1]) {
3347 if (last_search_pattern[0])
3348 last_search_pattern[0] = c;
3349 goto dc3; // if no pat re-use old pat
3351 if (q[0]) { // strlen(q) > 1: new pat- save it and find
3352 // there is a new pat
3353 free(last_search_pattern);
3354 last_search_pattern = xstrdup(q);
3355 goto dc3; // now find the pattern
3357 // user changed mind and erased the "/"- do nothing
3359 case 'N': // N- backward search for last pattern
3360 dir = BACK; // assume BACKWARD search
3362 if (last_search_pattern[0] == '?') {
3366 goto dc4; // now search for pattern
3368 case 'n': // n- repeat search for last pattern
3369 // search rest of text[] starting at next char
3370 // if search fails return orignal "p" not the "p+1" address
3374 dir = FORWARD; // assume FORWARD search
3376 if (last_search_pattern[0] == '?') {
3381 q = char_search(p, last_search_pattern + 1, dir, FULL);
3383 dot = q; // good search, update "dot"
3387 // no pattern found between "dot" and "end"- continue at top
3392 q = char_search(p, last_search_pattern + 1, dir, FULL);
3393 if (q != NULL) { // found something
3394 dot = q; // found new pattern- goto it
3395 msg = "search hit BOTTOM, continuing at TOP";
3397 msg = "search hit TOP, continuing at BOTTOM";
3400 msg = "Pattern not found";
3404 status_line_bold("%s", msg);
3405 } while (--cmdcnt > 0);
3407 case '{': // {- move backward paragraph
3408 q = char_search(dot, "\n\n", BACK, FULL);
3409 if (q != NULL) { // found blank line
3410 dot = next_line(q); // move to next blank line
3413 case '}': // }- move forward paragraph
3414 q = char_search(dot, "\n\n", FORWARD, FULL);
3415 if (q != NULL) { // found blank line
3416 dot = next_line(q); // move to next blank line
3419 #endif /* FEATURE_VI_SEARCH */
3420 case '0': // 0- goto begining of line
3430 if (c == '0' && cmdcnt < 1) {
3431 dot_begin(); // this was a standalone zero
3433 cmdcnt = cmdcnt * 10 + (c - '0'); // this 0 is part of a number
3436 case ':': // :- the colon mode commands
3437 p = get_input_line(":"); // get input line- use "status line"
3438 #if ENABLE_FEATURE_VI_COLON
3439 colon(p); // execute the command
3442 p++; // move past the ':'
3446 if (strncmp(p, "quit", cnt) == 0
3447 || strncmp(p, "q!", cnt) == 0 // delete lines
3449 if (file_modified && p[1] != '!') {
3450 status_line_bold("No write since last change (:%s! overrides)", p);
3454 } else if (strncmp(p, "write", cnt) == 0
3455 || strncmp(p, "wq", cnt) == 0
3456 || strncmp(p, "wn", cnt) == 0
3457 || (p[0] == 'x' && !p[1])
3459 cnt = file_write(current_filename, text, end - 1);
3462 status_line_bold("Write error: %s", strerror(errno));
3465 last_file_modified = -1;
3466 status_line("'%s' %dL, %dC", current_filename, count_lines(text, end - 1), cnt);
3467 if (p[0] == 'x' || p[1] == 'q' || p[1] == 'n'
3468 || p[0] == 'X' || p[1] == 'Q' || p[1] == 'N'
3473 } else if (strncmp(p, "file", cnt) == 0) {
3474 last_status_cksum = 0; // force status update
3475 } else if (sscanf(p, "%d", &j) > 0) {
3476 dot = find_line(j); // go to line # j
3478 } else { // unrecognized cmd
3481 #endif /* !FEATURE_VI_COLON */
3483 case '<': // <- Left shift something
3484 case '>': // >- Right shift something
3485 cnt = count_lines(text, dot); // remember what line we are on
3486 c1 = get_one_char(); // get the type of thing to delete
3487 find_range(&p, &q, c1);
3488 yank_delete(p, q, 1, YANKONLY); // save copy before change
3491 i = count_lines(p, q); // # of lines we are shifting
3492 for ( ; i > 0; i--, p = next_line(p)) {
3494 // shift left- remove tab or 8 spaces
3496 // shrink buffer 1 char
3497 text_hole_delete(p, p);
3498 } else if (*p == ' ') {
3499 // we should be calculating columns, not just SPACE
3500 for (j = 0; *p == ' ' && j < tabstop; j++) {
3501 text_hole_delete(p, p);
3504 } else if (c == '>') {
3505 // shift right -- add tab or 8 spaces
3506 char_insert(p, '\t');
3509 dot = find_line(cnt); // what line were we on
3511 end_cmd_q(); // stop adding to q
3513 case 'A': // A- append at e-o-l
3514 dot_end(); // go to e-o-l
3515 //**** fall through to ... 'a'
3516 case 'a': // a- append after current char
3521 case 'B': // B- back a blank-delimited Word
3522 case 'E': // E- end of a blank-delimited word
3523 case 'W': // W- forward a blank-delimited word
3528 if (c == 'W' || isspace(dot[dir])) {
3529 dot = skip_thing(dot, 1, dir, S_TO_WS);
3530 dot = skip_thing(dot, 2, dir, S_OVER_WS);
3533 dot = skip_thing(dot, 1, dir, S_BEFORE_WS);
3534 } while (--cmdcnt > 0);
3536 case 'C': // C- Change to e-o-l
3537 case 'D': // D- delete to e-o-l
3539 dot = dollar_line(dot); // move to before NL
3540 // copy text into a register and delete
3541 dot = yank_delete(save_dot, dot, 0, YANKDEL); // delete to e-o-l
3543 goto dc_i; // start inserting
3544 #if ENABLE_FEATURE_VI_DOT_CMD
3546 end_cmd_q(); // stop adding to q
3549 case 'g': // 'gg' goto a line number (vim) (default: very first line)
3550 c1 = get_one_char();
3553 buf[1] = c1; // TODO: if Unicode?
3555 not_implemented(buf);
3561 case 'G': // G- goto to a line number (default= E-O-F)
3562 dot = end - 1; // assume E-O-F
3564 dot = find_line(cmdcnt); // what line is #cmdcnt
3568 case 'H': // H- goto top line on screen
3570 if (cmdcnt > (rows - 1)) {
3571 cmdcnt = (rows - 1);
3578 case 'I': // I- insert before first non-blank
3581 //**** fall through to ... 'i'
3582 case 'i': // i- insert before current char
3583 case KEYCODE_INSERT: // Cursor Key Insert
3585 cmd_mode = 1; // start inserting
3587 case 'J': // J- join current and next lines together
3589 dot_end(); // move to NL
3590 if (dot < end - 1) { // make sure not last char in text[]
3591 *dot++ = ' '; // replace NL with space
3593 while (isblank(*dot)) { // delete leading WS
3597 } while (--cmdcnt > 0);
3598 end_cmd_q(); // stop adding to q
3600 case 'L': // L- goto bottom line on screen
3602 if (cmdcnt > (rows - 1)) {
3603 cmdcnt = (rows - 1);
3611 case 'M': // M- goto middle line on screen
3613 for (cnt = 0; cnt < (rows-1) / 2; cnt++)
3614 dot = next_line(dot);
3616 case 'O': // O- open a empty line above
3618 p = begin_line(dot);
3619 if (p[-1] == '\n') {
3621 case 'o': // o- open a empty line below; Yes, I know it is in the middle of the "if (..."
3623 dot = char_insert(dot, '\n');
3626 dot = char_insert(dot, '\n'); // i\n ESC
3631 case 'R': // R- continuous Replace char
3635 case KEYCODE_DELETE:
3638 case 'X': // X- delete char before dot
3639 case 'x': // x- delete the current char
3640 case 's': // s- substitute the current char
3645 if (dot[dir] != '\n') {
3647 dot--; // delete prev char
3648 dot = yank_delete(dot, dot, 0, YANKDEL); // delete char
3650 } while (--cmdcnt > 0);
3651 end_cmd_q(); // stop adding to q
3653 goto dc_i; // start inserting
3655 case 'Z': // Z- if modified, {write}; exit
3656 // ZZ means to save file (if necessary), then exit
3657 c1 = get_one_char();
3662 if (file_modified) {
3663 if (ENABLE_FEATURE_VI_READONLY && readonly_mode) {
3664 status_line_bold("'%s' is read only", current_filename);
3667 cnt = file_write(current_filename, text, end - 1);
3670 status_line_bold("Write error: %s", strerror(errno));
3671 } else if (cnt == (end - 1 - text + 1)) {
3678 case '^': // ^- move to first non-blank on line
3682 case 'b': // b- back a word
3683 case 'e': // e- end of word
3688 if ((dot + dir) < text || (dot + dir) > end - 1)
3691 if (isspace(*dot)) {
3692 dot = skip_thing(dot, (c == 'e') ? 2 : 1, dir, S_OVER_WS);
3694 if (isalnum(*dot) || *dot == '_') {
3695 dot = skip_thing(dot, 1, dir, S_END_ALNUM);
3696 } else if (ispunct(*dot)) {
3697 dot = skip_thing(dot, 1, dir, S_END_PUNCT);
3699 } while (--cmdcnt > 0);
3701 case 'c': // c- change something
3702 case 'd': // d- delete something
3703 #if ENABLE_FEATURE_VI_YANKMARK
3704 case 'y': // y- yank something
3705 case 'Y': // Y- Yank a line
3708 int yf, ml, whole = 0;
3709 yf = YANKDEL; // assume either "c" or "d"
3710 #if ENABLE_FEATURE_VI_YANKMARK
3711 if (c == 'y' || c == 'Y')
3716 c1 = get_one_char(); // get the type of thing to delete
3717 // determine range, and whether it spans lines
3718 ml = find_range(&p, &q, c1);
3719 if (c1 == 27) { // ESC- user changed mind and wants out
3720 c = c1 = 27; // Escape- do nothing
3721 } else if (strchr("wW", c1)) {
3723 // don't include trailing WS as part of word
3724 while (isblank(*q)) {
3725 if (q <= text || q[-1] == '\n')
3730 dot = yank_delete(p, q, ml, yf); // delete word
3731 } else if (strchr("^0bBeEft%$ lh\b\177", c1)) {
3732 // partial line copy text into a register and delete
3733 dot = yank_delete(p, q, ml, yf); // delete word
3734 } else if (strchr("cdykjHL+-{}\r\n", c1)) {
3735 // whole line copy text into a register and delete
3736 dot = yank_delete(p, q, ml, yf); // delete lines
3739 // could not recognize object
3740 c = c1 = 27; // error-
3746 dot = char_insert(dot, '\n');
3747 // on the last line of file don't move to prev line
3748 if (whole && dot != (end-1)) {
3751 } else if (c == 'd') {
3757 // if CHANGING, not deleting, start inserting after the delete
3759 strcpy(buf, "Change");
3760 goto dc_i; // start inserting
3763 strcpy(buf, "Delete");
3765 #if ENABLE_FEATURE_VI_YANKMARK
3766 if (c == 'y' || c == 'Y') {
3767 strcpy(buf, "Yank");
3771 for (cnt = 0; p <= q; p++) {
3775 status_line("%s %d lines (%d chars) using [%c]",
3776 buf, cnt, strlen(reg[YDreg]), what_reg());
3778 end_cmd_q(); // stop adding to q
3782 case 'k': // k- goto prev line, same col
3783 case KEYCODE_UP: // cursor key Up
3786 dot = move_to_col(dot, ccol + offset); // try stay in same col
3787 } while (--cmdcnt > 0);
3789 case 'r': // r- replace the current char with user input
3790 c1 = get_one_char(); // get the replacement char
3795 end_cmd_q(); // stop adding to q
3797 case 't': // t- move to char prior to next x
3798 last_forward_char = get_one_char();
3800 if (*dot == last_forward_char)
3802 last_forward_char = 0;
3804 case 'w': // w- forward a word
3806 if (isalnum(*dot) || *dot == '_') { // we are on ALNUM
3807 dot = skip_thing(dot, 1, FORWARD, S_END_ALNUM);
3808 } else if (ispunct(*dot)) { // we are on PUNCT
3809 dot = skip_thing(dot, 1, FORWARD, S_END_PUNCT);
3812 dot++; // move over word
3813 if (isspace(*dot)) {
3814 dot = skip_thing(dot, 2, FORWARD, S_OVER_WS);
3816 } while (--cmdcnt > 0);
3819 c1 = get_one_char(); // get the replacement char
3822 cnt = (rows - 2) / 2; // put dot at center
3824 cnt = rows - 2; // put dot at bottom
3825 screenbegin = begin_line(dot); // start dot at top
3826 dot_scroll(cnt, -1);
3828 case '|': // |- move to column "cmdcnt"
3829 dot = move_to_col(dot, cmdcnt - 1); // try to move to column
3831 case '~': // ~- flip the case of letters a-z -> A-Z
3833 if (islower(*dot)) {
3834 *dot = toupper(*dot);
3836 } else if (isupper(*dot)) {
3837 *dot = tolower(*dot);
3841 } while (--cmdcnt > 0);
3842 end_cmd_q(); // stop adding to q
3844 //----- The Cursor and Function Keys -----------------------------
3845 case KEYCODE_HOME: // Cursor Key Home
3848 // The Fn keys could point to do_macro which could translate them
3850 case KEYCODE_FUN1: // Function Key F1
3851 case KEYCODE_FUN2: // Function Key F2
3852 case KEYCODE_FUN3: // Function Key F3
3853 case KEYCODE_FUN4: // Function Key F4
3854 case KEYCODE_FUN5: // Function Key F5
3855 case KEYCODE_FUN6: // Function Key F6
3856 case KEYCODE_FUN7: // Function Key F7
3857 case KEYCODE_FUN8: // Function Key F8
3858 case KEYCODE_FUN9: // Function Key F9
3859 case KEYCODE_FUN10: // Function Key F10
3860 case KEYCODE_FUN11: // Function Key F11
3861 case KEYCODE_FUN12: // Function Key F12
3867 // if text[] just became empty, add back an empty line
3869 char_insert(text, '\n'); // start empty buf with dummy line
3872 // it is OK for dot to exactly equal to end, otherwise check dot validity
3874 dot = bound_dot(dot); // make sure "dot" is valid
3876 #if ENABLE_FEATURE_VI_YANKMARK
3877 check_context(c); // update the current context
3881 cmdcnt = 0; // cmd was not a number, reset cmdcnt
3882 cnt = dot - begin_line(dot);
3883 // Try to stay off of the Newline
3884 if (*dot == '\n' && cnt > 0 && cmd_mode == 0)
3888 /* NB! the CRASHME code is unmaintained, and doesn't currently build */
3889 #if ENABLE_FEATURE_VI_CRASHME
3890 static int totalcmds = 0;
3891 static int Mp = 85; // Movement command Probability
3892 static int Np = 90; // Non-movement command Probability
3893 static int Dp = 96; // Delete command Probability
3894 static int Ip = 97; // Insert command Probability
3895 static int Yp = 98; // Yank command Probability
3896 static int Pp = 99; // Put command Probability
3897 static int M = 0, N = 0, I = 0, D = 0, Y = 0, P = 0, U = 0;
3898 static const char chars[20] = "\t012345 abcdABCD-=.$";
3899 static const char *const words[20] = {
3900 "this", "is", "a", "test",
3901 "broadcast", "the", "emergency", "of",
3902 "system", "quick", "brown", "fox",
3903 "jumped", "over", "lazy", "dogs",
3904 "back", "January", "Febuary", "March"
3906 static const char *const lines[20] = {
3907 "You should have received a copy of the GNU General Public License\n",
3908 "char c, cm, *cmd, *cmd1;\n",
3909 "generate a command by percentages\n",
3910 "Numbers may be typed as a prefix to some commands.\n",
3911 "Quit, discarding changes!\n",
3912 "Forced write, if permission originally not valid.\n",
3913 "In general, any ex or ed command (such as substitute or delete).\n",
3914 "I have tickets available for the Blazers vs LA Clippers for Monday, Janurary 1 at 1:00pm.\n",
3915 "Please get w/ me and I will go over it with you.\n",
3916 "The following is a list of scheduled, committed changes.\n",
3917 "1. Launch Norton Antivirus (Start, Programs, Norton Antivirus)\n",
3918 "Reminder....Town Meeting in Central Perk cafe today at 3:00pm.\n",
3919 "Any question about transactions please contact Sterling Huxley.\n",
3920 "I will try to get back to you by Friday, December 31.\n",
3921 "This Change will be implemented on Friday.\n",
3922 "Let me know if you have problems accessing this;\n",
3923 "Sterling Huxley recently added you to the access list.\n",
3924 "Would you like to go to lunch?\n",
3925 "The last command will be automatically run.\n",
3926 "This is too much english for a computer geek.\n",
3928 static char *multilines[20] = {
3929 "You should have received a copy of the GNU General Public License\n",
3930 "char c, cm, *cmd, *cmd1;\n",
3931 "generate a command by percentages\n",
3932 "Numbers may be typed as a prefix to some commands.\n",
3933 "Quit, discarding changes!\n",
3934 "Forced write, if permission originally not valid.\n",
3935 "In general, any ex or ed command (such as substitute or delete).\n",
3936 "I have tickets available for the Blazers vs LA Clippers for Monday, Janurary 1 at 1:00pm.\n",
3937 "Please get w/ me and I will go over it with you.\n",
3938 "The following is a list of scheduled, committed changes.\n",
3939 "1. Launch Norton Antivirus (Start, Programs, Norton Antivirus)\n",
3940 "Reminder....Town Meeting in Central Perk cafe today at 3:00pm.\n",
3941 "Any question about transactions please contact Sterling Huxley.\n",
3942 "I will try to get back to you by Friday, December 31.\n",
3943 "This Change will be implemented on Friday.\n",
3944 "Let me know if you have problems accessing this;\n",
3945 "Sterling Huxley recently added you to the access list.\n",
3946 "Would you like to go to lunch?\n",
3947 "The last command will be automatically run.\n",
3948 "This is too much english for a computer geek.\n",
3951 // create a random command to execute
3952 static void crash_dummy()
3954 static int sleeptime; // how long to pause between commands
3955 char c, cm, *cmd, *cmd1;
3956 int i, cnt, thing, rbi, startrbi, percent;
3958 // "dot" movement commands
3959 cmd1 = " \n\r\002\004\005\006\025\0310^$-+wWeEbBhjklHL";
3961 // is there already a command running?
3962 if (readbuffer[0] > 0)
3965 readbuffer[0] = 'X';
3967 sleeptime = 0; // how long to pause between commands
3968 memset(readbuffer, '\0', sizeof(readbuffer));
3969 // generate a command by percentages
3970 percent = (int) lrand48() % 100; // get a number from 0-99
3971 if (percent < Mp) { // Movement commands
3972 // available commands
3975 } else if (percent < Np) { // non-movement commands
3976 cmd = "mz<>\'\""; // available commands
3978 } else if (percent < Dp) { // Delete commands
3979 cmd = "dx"; // available commands
3981 } else if (percent < Ip) { // Inset commands
3982 cmd = "iIaAsrJ"; // available commands
3984 } else if (percent < Yp) { // Yank commands
3985 cmd = "yY"; // available commands
3987 } else if (percent < Pp) { // Put commands
3988 cmd = "pP"; // available commands
3991 // We do not know how to handle this command, try again
3995 // randomly pick one of the available cmds from "cmd[]"
3996 i = (int) lrand48() % strlen(cmd);
3998 if (strchr(":\024", cm))
3999 goto cd0; // dont allow colon or ctrl-T commands
4000 readbuffer[rbi++] = cm; // put cmd into input buffer
4002 // now we have the command-
4003 // there are 1, 2, and multi char commands
4004 // find out which and generate the rest of command as necessary
4005 if (strchr("dmryz<>\'\"", cm)) { // 2-char commands
4006 cmd1 = " \n\r0$^-+wWeEbBhjklHL";
4007 if (cm == 'm' || cm == '\'' || cm == '\"') { // pick a reg[]
4008 cmd1 = "abcdefghijklmnopqrstuvwxyz";
4010 thing = (int) lrand48() % strlen(cmd1); // pick a movement command
4012 readbuffer[rbi++] = c; // add movement to input buffer
4014 if (strchr("iIaAsc", cm)) { // multi-char commands
4016 // change some thing
4017 thing = (int) lrand48() % strlen(cmd1); // pick a movement command
4019 readbuffer[rbi++] = c; // add movement to input buffer
4021 thing = (int) lrand48() % 4; // what thing to insert
4022 cnt = (int) lrand48() % 10; // how many to insert
4023 for (i = 0; i < cnt; i++) {
4024 if (thing == 0) { // insert chars
4025 readbuffer[rbi++] = chars[((int) lrand48() % strlen(chars))];
4026 } else if (thing == 1) { // insert words
4027 strcat(readbuffer, words[(int) lrand48() % 20]);
4028 strcat(readbuffer, " ");
4029 sleeptime = 0; // how fast to type
4030 } else if (thing == 2) { // insert lines
4031 strcat(readbuffer, lines[(int) lrand48() % 20]);
4032 sleeptime = 0; // how fast to type
4033 } else { // insert multi-lines
4034 strcat(readbuffer, multilines[(int) lrand48() % 20]);
4035 sleeptime = 0; // how fast to type
4038 strcat(readbuffer, "\033");
4040 readbuffer[0] = strlen(readbuffer + 1);
4044 mysleep(sleeptime); // sleep 1/100 sec
4047 // test to see if there are any errors
4048 static void crash_test()
4050 static time_t oldtim;
4057 strcat(msg, "end<text ");
4059 if (end > textend) {
4060 strcat(msg, "end>textend ");
4063 strcat(msg, "dot<text ");
4066 strcat(msg, "dot>end ");
4068 if (screenbegin < text) {
4069 strcat(msg, "screenbegin<text ");
4071 if (screenbegin > end - 1) {
4072 strcat(msg, "screenbegin>end-1 ");
4076 printf("\n\n%d: \'%c\' %s\n\n\n%s[Hit return to continue]%s",
4077 totalcmds, last_input_char, msg, ESC_BOLD_TEXT, ESC_NORM_TEXT);
4079 while (safe_read(STDIN_FILENO, d, 1) > 0) {
4080 if (d[0] == '\n' || d[0] == '\r')
4085 if (tim >= (oldtim + 3)) {
4086 sprintf(status_buffer,
4087 "Tot=%d: M=%d N=%d I=%d D=%d Y=%d P=%d U=%d size=%d",
4088 totalcmds, M, N, I, D, Y, P, U, end - text + 1);