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 //config:config FEATURE_VI_OPTIMIZE_CURSOR
141 //config: bool "Optimize cursor movement"
143 //config: depends on VI
145 //config: This will make the cursor movement faster, but requires more memory
146 //config: and it makes the applet a tiny bit larger.
148 //applet:IF_VI(APPLET(vi, BB_DIR_BIN, BB_SUID_DROP))
150 //kbuild:lib-$(CONFIG_VI) += vi.o
152 //usage:#define vi_trivial_usage
153 //usage: "[OPTIONS] [FILE]..."
154 //usage:#define vi_full_usage "\n\n"
155 //usage: "Edit FILE\n"
156 //usage: IF_FEATURE_VI_COLON(
157 //usage: "\n -c Initial command to run ($EXINIT also available)"
159 //usage: IF_FEATURE_VI_READONLY(
160 //usage: "\n -R Read-only"
162 //usage: "\n -H Short help regarding available features"
165 /* Should be after libbb.h: on some systems regex.h needs sys/types.h: */
166 #if ENABLE_FEATURE_VI_REGEX_SEARCH
170 /* the CRASHME code is unmaintained, and doesn't currently build */
171 #define ENABLE_FEATURE_VI_CRASHME 0
174 #if ENABLE_LOCALE_SUPPORT
176 #if ENABLE_FEATURE_VI_8BIT
177 //FIXME: this does not work properly for Unicode anyway
178 # define Isprint(c) (isprint)(c)
180 # define Isprint(c) isprint_asciionly(c)
185 /* 0x9b is Meta-ESC */
186 #if ENABLE_FEATURE_VI_8BIT
187 # define Isprint(c) ((unsigned char)(c) >= ' ' && (c) != 0x7f && (unsigned char)(c) != 0x9b)
189 # define Isprint(c) ((unsigned char)(c) >= ' ' && (unsigned char)(c) < 0x7f)
196 MAX_TABSTOP = 32, // sanity limit
197 // User input len. Need not be extra big.
198 // Lines in file being edited *can* be bigger than this.
200 // Sanity limits. We have only one buffer of this size.
201 MAX_SCR_COLS = CONFIG_FEATURE_VI_MAX_LEN,
202 MAX_SCR_ROWS = CONFIG_FEATURE_VI_MAX_LEN,
205 /* vt102 typical ESC sequence */
206 /* terminal standout start/normal ESC sequence */
207 #define SOs "\033[7m"
208 #define SOn "\033[0m"
209 /* terminal bell sequence */
211 /* Clear-end-of-line and Clear-end-of-screen ESC sequence */
212 #define Ceol "\033[K"
213 #define Ceos "\033[J"
214 /* Cursor motion arbitrary destination ESC sequence */
215 #define CMrc "\033[%u;%uH"
216 /* Cursor motion up and down ESC sequence */
217 #define CMup "\033[A"
220 #if ENABLE_FEATURE_VI_DOT_CMD || ENABLE_FEATURE_VI_YANKMARK
221 // cmds modifying text[]
222 // vda: removed "aAiIs" as they switch us into insert mode
223 // and remembering input for replay after them makes no sense
224 static const char modifying_cmds[] = "cCdDJoOpPrRxX<>~";
230 FORWARD = 1, // code depends on "1" for array index
231 BACK = -1, // code depends on "-1" for array index
232 LIMITED = 0, // how much of text[] in char_search
233 FULL = 1, // how much of text[] in char_search
235 S_BEFORE_WS = 1, // used in skip_thing() for moving "dot"
236 S_TO_WS = 2, // used in skip_thing() for moving "dot"
237 S_OVER_WS = 3, // used in skip_thing() for moving "dot"
238 S_END_PUNCT = 4, // used in skip_thing() for moving "dot"
239 S_END_ALNUM = 5, // used in skip_thing() for moving "dot"
243 /* vi.c expects chars to be unsigned. */
244 /* busybox build system provides that, but it's better */
245 /* to audit and fix the source */
248 /* many references - keep near the top of globals */
249 char *text, *end; // pointers to the user data in memory
250 char *dot; // where all the action takes place
251 int text_size; // size of the allocated buffer
255 #define VI_AUTOINDENT 1
256 #define VI_SHOWMATCH 2
257 #define VI_IGNORECASE 4
258 #define VI_ERR_METHOD 8
259 #define autoindent (vi_setops & VI_AUTOINDENT)
260 #define showmatch (vi_setops & VI_SHOWMATCH )
261 #define ignorecase (vi_setops & VI_IGNORECASE)
262 /* indicate error with beep or flash */
263 #define err_method (vi_setops & VI_ERR_METHOD)
265 #if ENABLE_FEATURE_VI_READONLY
266 smallint readonly_mode;
267 #define SET_READONLY_FILE(flags) ((flags) |= 0x01)
268 #define SET_READONLY_MODE(flags) ((flags) |= 0x02)
269 #define UNSET_READONLY_FILE(flags) ((flags) &= 0xfe)
271 #define SET_READONLY_FILE(flags) ((void)0)
272 #define SET_READONLY_MODE(flags) ((void)0)
273 #define UNSET_READONLY_FILE(flags) ((void)0)
276 smallint editing; // >0 while we are editing a file
277 // [code audit says "can be 0, 1 or 2 only"]
278 smallint cmd_mode; // 0=command 1=insert 2=replace
279 int file_modified; // buffer contents changed (counter, not flag!)
280 int last_file_modified; // = -1;
281 int fn_start; // index of first cmd line file name
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_OPTIMIZE_CURSOR
308 int last_row; // where the cursor was last moved to
310 #if ENABLE_FEATURE_VI_USE_SIGNALS || ENABLE_FEATURE_VI_CRASHME
313 #if ENABLE_FEATURE_VI_SEARCH
314 char *last_search_pattern; // last pattern from a '/' or '?' search
318 #if ENABLE_FEATURE_VI_YANKMARK
319 char *edit_file__cur_line;
321 int refresh__old_offset;
322 int format_edit_status__tot;
324 /* a few references only */
325 #if ENABLE_FEATURE_VI_YANKMARK
326 int YDreg, Ureg; // default delete register and orig line for "U"
327 char *reg[28]; // named register a-z, "D", and "U" 0-25,26,27
328 char *mark[28]; // user marks points somewhere in text[]- a-z and previous context ''
329 char *context_start, *context_end;
331 #if ENABLE_FEATURE_VI_USE_SIGNALS
332 sigjmp_buf restart; // catch_sig()
334 struct termios term_orig, term_vi; // remember what the cooked mode was
335 #if ENABLE_FEATURE_VI_COLON
336 char *initial_cmds[3]; // currently 2 entries, NULL terminated
338 // Should be just enough to hold a key sequence,
339 // but CRASHME mode uses it as generated command buffer too
340 #if ENABLE_FEATURE_VI_CRASHME
341 char readbuffer[128];
343 char readbuffer[KEYCODE_BUFFER_SIZE];
345 #define STATUS_BUFFER_LEN 200
346 char status_buffer[STATUS_BUFFER_LEN]; // messages to the user
347 #if ENABLE_FEATURE_VI_DOT_CMD
348 char last_modifying_cmd[MAX_INPUT_LEN]; // last modifying cmd for "."
350 char get_input_line__buf[MAX_INPUT_LEN]; /* former static */
352 char scr_out_buf[MAX_SCR_COLS + MAX_TABSTOP * 2];
354 #define G (*ptr_to_globals)
355 #define text (G.text )
356 #define text_size (G.text_size )
361 #define vi_setops (G.vi_setops )
362 #define editing (G.editing )
363 #define cmd_mode (G.cmd_mode )
364 #define file_modified (G.file_modified )
365 #define last_file_modified (G.last_file_modified )
366 #define fn_start (G.fn_start )
367 #define save_argc (G.save_argc )
368 #define cmdcnt (G.cmdcnt )
369 #define rows (G.rows )
370 #define columns (G.columns )
371 #define crow (G.crow )
372 #define ccol (G.ccol )
373 #define offset (G.offset )
374 #define status_buffer (G.status_buffer )
375 #define have_status_msg (G.have_status_msg )
376 #define last_status_cksum (G.last_status_cksum )
377 #define current_filename (G.current_filename )
378 #define screen (G.screen )
379 #define screensize (G.screensize )
380 #define screenbegin (G.screenbegin )
381 #define tabstop (G.tabstop )
382 #define last_forward_char (G.last_forward_char )
383 #define erase_char (G.erase_char )
384 #define last_input_char (G.last_input_char )
385 #if ENABLE_FEATURE_VI_READONLY
386 #define readonly_mode (G.readonly_mode )
388 #define readonly_mode 0
390 #define adding2q (G.adding2q )
391 #define lmc_len (G.lmc_len )
393 #define ioq_start (G.ioq_start )
394 #define last_row (G.last_row )
395 #define my_pid (G.my_pid )
396 #define last_search_pattern (G.last_search_pattern)
398 #define edit_file__cur_line (G.edit_file__cur_line)
399 #define refresh__old_offset (G.refresh__old_offset)
400 #define format_edit_status__tot (G.format_edit_status__tot)
402 #define YDreg (G.YDreg )
403 #define Ureg (G.Ureg )
404 #define mark (G.mark )
405 #define context_start (G.context_start )
406 #define context_end (G.context_end )
407 #define restart (G.restart )
408 #define term_orig (G.term_orig )
409 #define term_vi (G.term_vi )
410 #define initial_cmds (G.initial_cmds )
411 #define readbuffer (G.readbuffer )
412 #define scr_out_buf (G.scr_out_buf )
413 #define last_modifying_cmd (G.last_modifying_cmd )
414 #define get_input_line__buf (G.get_input_line__buf)
416 #define INIT_G() do { \
417 SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \
418 last_file_modified = -1; \
419 /* "" but has space for 2 chars: */ \
420 IF_FEATURE_VI_SEARCH(last_search_pattern = xzalloc(2);) \
424 static int init_text_buffer(char *); // init from file or create new
425 static void edit_file(char *); // edit one file
426 static void do_cmd(int); // execute a command
427 static int next_tabstop(int);
428 static void sync_cursor(char *, int *, int *); // synchronize the screen cursor to dot
429 static char *begin_line(char *); // return pointer to cur line B-o-l
430 static char *end_line(char *); // return pointer to cur line E-o-l
431 static char *prev_line(char *); // return pointer to prev line B-o-l
432 static char *next_line(char *); // return pointer to next line B-o-l
433 static char *end_screen(void); // get pointer to last char on screen
434 static int count_lines(char *, char *); // count line from start to stop
435 static char *find_line(int); // find begining of line #li
436 static char *move_to_col(char *, int); // move "p" to column l
437 static void dot_left(void); // move dot left- dont leave line
438 static void dot_right(void); // move dot right- dont leave line
439 static void dot_begin(void); // move dot to B-o-l
440 static void dot_end(void); // move dot to E-o-l
441 static void dot_next(void); // move dot to next line B-o-l
442 static void dot_prev(void); // move dot to prev line B-o-l
443 static void dot_scroll(int, int); // move the screen up or down
444 static void dot_skip_over_ws(void); // move dot pat WS
445 static void dot_delete(void); // delete the char at 'dot'
446 static char *bound_dot(char *); // make sure text[0] <= P < "end"
447 static char *new_screen(int, int); // malloc virtual screen memory
448 static char *char_insert(char *, char); // insert the char c at 'p'
449 // might reallocate text[]! use p += stupid_insert(p, ...),
450 // and be careful to not use pointers into potentially freed text[]!
451 static uintptr_t stupid_insert(char *, char); // stupidly insert the char c at 'p'
452 static int find_range(char **, char **, char); // return pointers for an object
453 static int st_test(char *, int, int, char *); // helper for skip_thing()
454 static char *skip_thing(char *, int, int, int); // skip some object
455 static char *find_pair(char *, char); // find matching pair () [] {}
456 static char *text_hole_delete(char *, char *); // at "p", delete a 'size' byte hole
457 // might reallocate text[]! use p += text_hole_make(p, ...),
458 // and be careful to not use pointers into potentially freed text[]!
459 static uintptr_t text_hole_make(char *, int); // at "p", make a 'size' byte hole
460 static char *yank_delete(char *, char *, int, int); // yank text[] into register then delete
461 static void show_help(void); // display some help info
462 static void rawmode(void); // set "raw" mode on tty
463 static void cookmode(void); // return to "cooked" mode on tty
464 // sleep for 'h' 1/100 seconds, return 1/0 if stdin is (ready for read)/(not ready)
465 static int mysleep(int);
466 static int readit(void); // read (maybe cursor) key from stdin
467 static int get_one_char(void); // read 1 char from stdin
468 static int file_size(const char *); // what is the byte size of "fn"
469 #if !ENABLE_FEATURE_VI_READONLY
470 #define file_insert(fn, p, update_ro_status) file_insert(fn, p)
472 // file_insert might reallocate text[]!
473 static int file_insert(const char *, char *, int);
474 static int file_write(char *, char *, char *);
475 #if !ENABLE_FEATURE_VI_OPTIMIZE_CURSOR
476 #define place_cursor(a, b, optimize) place_cursor(a, b)
478 static void place_cursor(int, int, int);
479 static void screen_erase(void);
480 static void clear_to_eol(void);
481 static void clear_to_eos(void);
482 static void go_bottom_and_clear_to_eol(void);
483 static void standout_start(void); // send "start reverse video" sequence
484 static void standout_end(void); // send "end reverse video" sequence
485 static void flash(int); // flash the terminal screen
486 static void show_status_line(void); // put a message on the bottom line
487 static void status_line(const char *, ...); // print to status buf
488 static void status_line_bold(const char *, ...);
489 static void not_implemented(const char *); // display "Not implemented" message
490 static int format_edit_status(void); // format file status on status line
491 static void redraw(int); // force a full screen refresh
492 static char* format_line(char* /*, int*/);
493 static void refresh(int); // update the terminal from screen[]
495 static void Indicate_Error(void); // use flash or beep to indicate error
496 #define indicate_error(c) Indicate_Error()
497 static void Hit_Return(void);
499 #if ENABLE_FEATURE_VI_SEARCH
500 static char *char_search(char *, const char *, int, int); // search for pattern starting at p
502 #if ENABLE_FEATURE_VI_COLON
503 static char *get_one_address(char *, int *); // get colon addr, if present
504 static char *get_address(char *, int *, int *); // get two colon addrs, if present
505 static void colon(char *); // execute the "colon" mode cmds
507 #if ENABLE_FEATURE_VI_USE_SIGNALS
508 static void winch_sig(int); // catch window size changes
509 static void suspend_sig(int); // catch ctrl-Z
510 static void catch_sig(int); // catch ctrl-C and alarm time-outs
512 #if ENABLE_FEATURE_VI_DOT_CMD
513 static void start_new_cmd_q(char); // new queue for command
514 static void end_cmd_q(void); // stop saving input chars
516 #define end_cmd_q() ((void)0)
518 #if ENABLE_FEATURE_VI_SETOPTS
519 static void showmatching(char *); // show the matching pair () [] {}
521 #if ENABLE_FEATURE_VI_YANKMARK || (ENABLE_FEATURE_VI_COLON && ENABLE_FEATURE_VI_SEARCH) || ENABLE_FEATURE_VI_CRASHME
522 // might reallocate text[]! use p += string_insert(p, ...),
523 // and be careful to not use pointers into potentially freed text[]!
524 static uintptr_t string_insert(char *, const char *); // insert the string at 'p'
526 #if ENABLE_FEATURE_VI_YANKMARK
527 static char *text_yank(char *, char *, int); // save copy of "p" into a register
528 static char what_reg(void); // what is letter of current YDreg
529 static void check_context(char); // remember context for '' command
531 #if ENABLE_FEATURE_VI_CRASHME
532 static void crash_dummy();
533 static void crash_test();
534 static int crashme = 0;
538 static void write1(const char *out)
543 int vi_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
544 int vi_main(int argc, char **argv)
550 #if ENABLE_FEATURE_VI_USE_SIGNALS || ENABLE_FEATURE_VI_CRASHME
553 #if ENABLE_FEATURE_VI_CRASHME
554 srand((long) my_pid);
556 #ifdef NO_SUCH_APPLET_YET
557 /* If we aren't "vi", we are "view" */
558 if (ENABLE_FEATURE_VI_READONLY && applet_name[2]) {
559 SET_READONLY_MODE(readonly_mode);
563 vi_setops = VI_AUTOINDENT | VI_SHOWMATCH | VI_IGNORECASE;
564 // 1- process $HOME/.exrc file (not inplemented yet)
565 // 2- process EXINIT variable from environment
566 // 3- process command line args
567 #if ENABLE_FEATURE_VI_COLON
569 char *p = getenv("EXINIT");
571 initial_cmds[0] = xstrndup(p, MAX_INPUT_LEN);
574 while ((c = getopt(argc, argv, "hCRH" IF_FEATURE_VI_COLON("c:"))) != -1) {
576 #if ENABLE_FEATURE_VI_CRASHME
581 #if ENABLE_FEATURE_VI_READONLY
582 case 'R': // Read-only flag
583 SET_READONLY_MODE(readonly_mode);
586 #if ENABLE_FEATURE_VI_COLON
587 case 'c': // cmd line vi command
589 initial_cmds[initial_cmds[0] != 0] = xstrndup(optarg, MAX_INPUT_LEN);
601 // The argv array can be used by the ":next" and ":rewind" commands
603 fn_start = optind; // remember first file name for :next and :rew
606 //----- This is the main file handling loop --------------
608 edit_file(argv[optind]); /* param might be NULL */
609 if (++optind >= argc)
612 //-----------------------------------------------------------
617 /* read text from file or create an empty buf */
618 /* will also update current_filename */
619 static int init_text_buffer(char *fn)
622 int size = file_size(fn); // file size. -1 means does not exist.
624 /* allocate/reallocate text buffer */
626 text_size = size + 10240;
627 screenbegin = dot = end = text = xzalloc(text_size);
629 if (fn != current_filename) {
630 free(current_filename);
631 current_filename = xstrdup(fn);
634 // file dont exist. Start empty buf with dummy line
635 char_insert(text, '\n');
638 rc = file_insert(fn, text, 1);
641 last_file_modified = -1;
642 #if ENABLE_FEATURE_VI_YANKMARK
643 /* init the marks. */
644 memset(mark, 0, sizeof(mark));
649 #if ENABLE_FEATURE_VI_WIN_RESIZE
650 static int query_screen_dimensions(void)
652 int err = get_terminal_width_height(STDIN_FILENO, &columns, &rows);
653 if (rows > MAX_SCR_ROWS)
655 if (columns > MAX_SCR_COLS)
656 columns = MAX_SCR_COLS;
660 # define query_screen_dimensions() (0)
663 static void edit_file(char *fn)
665 #if ENABLE_FEATURE_VI_YANKMARK
666 #define cur_line edit_file__cur_line
669 #if ENABLE_FEATURE_VI_USE_SIGNALS
673 editing = 1; // 0 = exit, 1 = one file, 2 = multiple files
677 IF_FEATURE_VI_ASK_TERMINAL(G.get_rowcol_error =) query_screen_dimensions();
678 #if ENABLE_FEATURE_VI_ASK_TERMINAL
679 if (G.get_rowcol_error /* TODO? && no input on stdin */) {
681 write1("\033[999;999H" "\033[6n");
683 k = read_key(STDIN_FILENO, readbuffer, /*timeout_ms:*/ 100);
684 if ((int32_t)k == KEYCODE_CURSOR_POS) {
685 uint32_t rc = (k >> 32);
686 columns = (rc & 0x7fff);
687 if (columns > MAX_SCR_COLS)
688 columns = MAX_SCR_COLS;
689 rows = ((rc >> 16) & 0x7fff);
690 if (rows > MAX_SCR_ROWS)
695 new_screen(rows, columns); // get memory for virtual screen
696 init_text_buffer(fn);
698 #if ENABLE_FEATURE_VI_YANKMARK
699 YDreg = 26; // default Yank/Delete reg
700 Ureg = 27; // hold orig line for "U" cmd
701 mark[26] = mark[27] = text; // init "previous context"
704 last_forward_char = last_input_char = '\0';
708 #if ENABLE_FEATURE_VI_USE_SIGNALS
709 signal(SIGINT, catch_sig);
710 signal(SIGWINCH, winch_sig);
711 signal(SIGTSTP, suspend_sig);
712 sig = sigsetjmp(restart, 1);
714 screenbegin = dot = text;
718 cmd_mode = 0; // 0=command 1=insert 2='R'eplace
721 offset = 0; // no horizontal offset
723 #if ENABLE_FEATURE_VI_DOT_CMD
725 ioq = ioq_start = NULL;
730 #if ENABLE_FEATURE_VI_COLON
735 while ((p = initial_cmds[n]) != NULL) {
745 free(initial_cmds[n]);
746 initial_cmds[n] = NULL;
751 redraw(FALSE); // dont force every col re-draw
752 //------This is the main Vi cmd handling loop -----------------------
753 while (editing > 0) {
754 #if ENABLE_FEATURE_VI_CRASHME
756 if ((end - text) > 1) {
757 crash_dummy(); // generate a random command
760 string_insert(text, "\n\n##### Ran out of text to work on. #####\n\n"); // insert the string
766 last_input_char = c = get_one_char(); // get a cmd from user
767 #if ENABLE_FEATURE_VI_YANKMARK
768 // save a copy of the current line- for the 'U" command
769 if (begin_line(dot) != cur_line) {
770 cur_line = begin_line(dot);
771 text_yank(begin_line(dot), end_line(dot), Ureg);
774 #if ENABLE_FEATURE_VI_DOT_CMD
775 // These are commands that change text[].
776 // Remember the input for the "." command
777 if (!adding2q && ioq_start == NULL
778 && cmd_mode == 0 // command mode
779 && c > '\0' // exclude NUL and non-ASCII chars
780 && c < 0x7f // (Unicode and such)
781 && strchr(modifying_cmds, c)
786 do_cmd(c); // execute the user command
788 // poll to see if there is input already waiting. if we are
789 // not able to display output fast enough to keep up, skip
790 // the display update until we catch up with input.
791 if (!readbuffer[0] && mysleep(0) == 0) {
792 // no input pending - so update output
796 #if ENABLE_FEATURE_VI_CRASHME
798 crash_test(); // test editor variables
801 //-------------------------------------------------------------------
803 go_bottom_and_clear_to_eol();
808 //----- The Colon commands -------------------------------------
809 #if ENABLE_FEATURE_VI_COLON
810 static char *get_one_address(char *p, int *addr) // get colon addr, if present
814 IF_FEATURE_VI_YANKMARK(char c;)
815 IF_FEATURE_VI_SEARCH(char *pat;)
817 *addr = -1; // assume no addr
818 if (*p == '.') { // the current line
821 *addr = count_lines(text, q);
823 #if ENABLE_FEATURE_VI_YANKMARK
824 else if (*p == '\'') { // is this a mark addr
828 if (c >= 'a' && c <= 'z') {
831 q = mark[(unsigned char) c];
832 if (q != NULL) { // is mark valid
833 *addr = count_lines(text, q);
838 #if ENABLE_FEATURE_VI_SEARCH
839 else if (*p == '/') { // a search pattern
840 q = strchrnul(++p, '/');
841 pat = xstrndup(p, q - p); // save copy of pattern
845 q = char_search(dot, pat, FORWARD, FULL);
847 *addr = count_lines(text, q);
852 else if (*p == '$') { // the last line in file
854 q = begin_line(end - 1);
855 *addr = count_lines(text, q);
856 } else if (isdigit(*p)) { // specific line number
857 sscanf(p, "%d%n", addr, &st);
860 // unrecognized address - assume -1
866 static char *get_address(char *p, int *b, int *e) // get two colon addrs, if present
868 //----- get the address' i.e., 1,3 'a,'b -----
869 // get FIRST addr, if present
871 p++; // skip over leading spaces
872 if (*p == '%') { // alias for 1,$
875 *e = count_lines(text, end-1);
878 p = get_one_address(p, b);
881 if (*p == ',') { // is there a address separator
885 // get SECOND addr, if present
886 p = get_one_address(p, e);
890 p++; // skip over trailing spaces
894 #if ENABLE_FEATURE_VI_SET && ENABLE_FEATURE_VI_SETOPTS
895 static void setops(const char *args, const char *opname, int flg_no,
896 const char *short_opname, int opt)
898 const char *a = args + flg_no;
899 int l = strlen(opname) - 1; /* opname have + ' ' */
901 // maybe strncmp? we had tons of erroneous strncasecmp's...
902 if (strncasecmp(a, opname, l) == 0
903 || strncasecmp(a, short_opname, 2) == 0
913 // buf must be no longer than MAX_INPUT_LEN!
914 static void colon(char *buf)
916 char c, *orig_buf, *buf1, *q, *r;
917 char *fn, cmd[MAX_INPUT_LEN], args[MAX_INPUT_LEN];
918 int i, l, li, ch, b, e;
919 int useforce, forced = FALSE;
921 // :3154 // if (-e line 3154) goto it else stay put
922 // :4,33w! foo // write a portion of buffer to file "foo"
923 // :w // write all of buffer to current file
925 // :q! // quit- dont care about modified file
926 // :'a,'z!sort -u // filter block through sort
927 // :'f // goto mark "f"
928 // :'fl // list literal the mark "f" line
929 // :.r bar // read file "bar" into buffer before dot
930 // :/123/,/abc/d // delete lines from "123" line to "abc" line
931 // :/xyz/ // goto the "xyz" line
932 // :s/find/replace/ // substitute pattern "find" with "replace"
933 // :!<cmd> // run <cmd> then return
939 buf++; // move past the ':'
943 q = text; // assume 1,$ for the range
945 li = count_lines(text, end - 1);
946 fn = current_filename;
948 // look for optional address(es) :. :1 :1,9 :'q,'a :%
949 buf = get_address(buf, &b, &e);
951 // remember orig command line
954 // get the COMMAND into cmd[]
956 while (*buf != '\0') {
963 while (isblank(*buf))
967 buf1 = last_char_is(cmd, '!');
970 *buf1 = '\0'; // get rid of !
973 // if there is only one addr, then the addr
974 // is the line number of the single line the
975 // user wants. So, reset the end
976 // pointer to point at end of the "b" line
977 q = find_line(b); // what line is #b
982 // we were given two addrs. change the
983 // end pointer to the addr given by user.
984 r = find_line(e); // what line is #e
988 // ------------ now look for the command ------------
990 if (i == 0) { // :123CR goto line #123
992 dot = find_line(b); // what line is #b
996 #if ENABLE_FEATURE_ALLOW_EXEC
997 else if (cmd[0] == '!') { // run a cmd
999 // :!ls run the <cmd>
1000 go_bottom_and_clear_to_eol();
1002 retcode = system(orig_buf + 1); // run the cmd
1004 printf("\nshell returned %i\n\n", retcode);
1006 Hit_Return(); // let user see results
1009 else if (cmd[0] == '=' && !cmd[1]) { // where is the address
1010 if (b < 0) { // no addr given- use defaults
1011 b = e = count_lines(text, dot);
1013 status_line("%d", b);
1014 } else if (strncmp(cmd, "delete", i) == 0) { // delete lines
1015 if (b < 0) { // no addr given- use defaults
1016 q = begin_line(dot); // assume .,. for the range
1019 dot = yank_delete(q, r, 1, YANKDEL); // save, then delete lines
1021 } else if (strncmp(cmd, "edit", i) == 0) { // Edit a file
1022 // don't edit, if the current file has been modified
1023 if (file_modified && !useforce) {
1024 status_line_bold("No write since last change (:edit! overrides)");
1028 // the user supplied a file name
1030 } else if (current_filename && current_filename[0]) {
1031 // no user supplied name- use the current filename
1032 // fn = current_filename; was set by default
1034 // no user file name, no current name- punt
1035 status_line_bold("No current filename");
1039 if (init_text_buffer(fn) < 0)
1042 #if ENABLE_FEATURE_VI_YANKMARK
1043 if (Ureg >= 0 && Ureg < 28) {
1044 free(reg[Ureg]); // free orig line reg- for 'U'
1047 if (YDreg >= 0 && YDreg < 28) {
1048 free(reg[YDreg]); // free default yank/delete register
1052 // how many lines in text[]?
1053 li = count_lines(text, end - 1);
1054 status_line("\"%s\"%s"
1055 IF_FEATURE_VI_READONLY("%s")
1056 " %dL, %dC", current_filename,
1057 (file_size(fn) < 0 ? " [New file]" : ""),
1058 IF_FEATURE_VI_READONLY(
1059 ((readonly_mode) ? " [Readonly]" : ""),
1062 } else if (strncmp(cmd, "file", i) == 0) { // what File is this
1063 if (b != -1 || e != -1) {
1064 status_line_bold("No address allowed on this command");
1068 // user wants a new filename
1069 free(current_filename);
1070 current_filename = xstrdup(args);
1072 // user wants file status info
1073 last_status_cksum = 0; // force status update
1075 } else if (strncmp(cmd, "features", i) == 0) { // what features are available
1076 // print out values of all features
1077 go_bottom_and_clear_to_eol();
1082 } else if (strncmp(cmd, "list", i) == 0) { // literal print line
1083 if (b < 0) { // no addr given- use defaults
1084 q = begin_line(dot); // assume .,. for the range
1087 go_bottom_and_clear_to_eol();
1089 for (; q <= r; q++) {
1093 c_is_no_print = (c & 0x80) && !Isprint(c);
1094 if (c_is_no_print) {
1100 } else if (c < ' ' || c == 127) {
1112 } else if (strncmp(cmd, "quit", i) == 0 // quit
1113 || strncmp(cmd, "next", i) == 0 // edit next file
1117 // 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)",
1127 (*cmd == 'q' ? "quit" : "next"));
1130 // are there other file to edit
1131 n = save_argc - optind - 1;
1132 if (*cmd == 'q' && n > 0) {
1133 status_line_bold("%d more file(s) to edit", n);
1136 if (*cmd == 'n' && n <= 0) {
1137 status_line_bold("No more files to edit");
1141 } else if (strncmp(cmd, "read", i) == 0) { // read file into text[]
1144 status_line_bold("No filename given");
1147 if (b < 0) { // no addr given- use defaults
1148 q = begin_line(dot); // assume "dot"
1150 // read after current line- unless user said ":0r foo"
1153 { // dance around potentially-reallocated text[]
1154 uintptr_t ofs = q - text;
1155 ch = file_insert(fn, q, 0);
1159 goto ret; // nothing was inserted
1160 // how many lines in text[]?
1161 li = count_lines(q, q + ch - 1);
1162 status_line("\"%s\""
1163 IF_FEATURE_VI_READONLY("%s")
1165 IF_FEATURE_VI_READONLY((readonly_mode ? " [Readonly]" : ""),)
1168 // if the insert is before "dot" then we need to update
1171 /*file_modified++; - done by file_insert */
1173 } else if (strncmp(cmd, "rewind", i) == 0) { // rewind cmd line args
1174 if (file_modified && !useforce) {
1175 status_line_bold("No write since last change (:rewind! overrides)");
1177 // reset the filenames to edit
1178 optind = fn_start - 1;
1181 #if ENABLE_FEATURE_VI_SET
1182 } else if (strncmp(cmd, "set", i) == 0) { // set or clear features
1183 #if ENABLE_FEATURE_VI_SETOPTS
1186 i = 0; // offset into args
1187 // only blank is regarded as args delmiter. What about tab '\t' ?
1188 if (!args[0] || strcasecmp(args, "all") == 0) {
1189 // print out values of all options
1190 #if ENABLE_FEATURE_VI_SETOPTS
1197 autoindent ? "" : "no",
1198 err_method ? "" : "no",
1199 ignorecase ? "" : "no",
1200 showmatch ? "" : "no",
1206 #if ENABLE_FEATURE_VI_SETOPTS
1209 if (strncmp(argp, "no", 2) == 0)
1210 i = 2; // ":set noautoindent"
1211 setops(argp, "autoindent ", i, "ai", VI_AUTOINDENT);
1212 setops(argp, "flash " , i, "fl", VI_ERR_METHOD);
1213 setops(argp, "ignorecase ", i, "ic", VI_IGNORECASE);
1214 setops(argp, "showmatch " , i, "sm", VI_SHOWMATCH );
1215 if (strncmp(argp + i, "tabstop=", 8) == 0) {
1217 sscanf(argp + i+8, "%u", &t);
1218 if (t > 0 && t <= MAX_TABSTOP)
1221 argp = skip_non_whitespace(argp);
1222 argp = skip_whitespace(argp);
1224 #endif /* FEATURE_VI_SETOPTS */
1225 #endif /* FEATURE_VI_SET */
1226 #if ENABLE_FEATURE_VI_SEARCH
1227 } else if (cmd[0] == 's') { // substitute a pattern with a replacement pattern
1228 char *F, *R, *flags;
1229 size_t len_F, len_R;
1230 int gflag; // global replace flag
1232 // F points to the "find" pattern
1233 // R points to the "replace" pattern
1234 // replace the cmd line delimiters "/" with NULs
1235 c = orig_buf[1]; // what is the delimiter
1236 F = orig_buf + 2; // start of "find"
1237 R = strchr(F, c); // middle delimiter
1241 *R++ = '\0'; // terminate "find"
1242 flags = strchr(R, c);
1246 *flags++ = '\0'; // terminate "replace"
1250 if (b < 0) { // maybe :s/foo/bar/
1251 q = begin_line(dot); // start with cur line
1252 b = count_lines(text, q); // cur line number
1255 e = b; // maybe :.s/foo/bar/
1257 for (i = b; i <= e; i++) { // so, :20,23 s \0 find \0 replace \0
1258 char *ls = q; // orig line start
1261 found = char_search(q, F, FORWARD, LIMITED); // search cur line only for "find"
1264 // we found the "find" pattern - delete it
1265 text_hole_delete(found, found + len_F - 1);
1266 // inset the "replace" patern
1267 bias = string_insert(found, R); // insert the string
1270 /*q += bias; - recalculated anyway */
1271 // check for "global" :s/foo/bar/g
1273 if ((found + len_R) < end_line(ls)) {
1275 goto vc4; // don't let q move past cur line
1281 #endif /* FEATURE_VI_SEARCH */
1282 } else if (strncmp(cmd, "version", i) == 0) { // show software version
1283 status_line(BB_VER " " BB_BT);
1284 } else if (strncmp(cmd, "write", i) == 0 // write text to file
1285 || strncmp(cmd, "wq", i) == 0
1286 || strncmp(cmd, "wn", i) == 0
1287 || (cmd[0] == 'x' && !cmd[1])
1289 // is there a file name to write to?
1293 #if ENABLE_FEATURE_VI_READONLY
1294 if (readonly_mode && !useforce) {
1295 status_line_bold("\"%s\" File is read only", fn);
1299 // how many lines in text[]?
1300 li = count_lines(q, r);
1302 // see if file exists- if not, its just a new file request
1304 // if "fn" is not write-able, chmod u+w
1305 // sprintf(syscmd, "chmod u+w %s", fn);
1309 l = file_write(fn, q, r);
1310 if (useforce && forced) {
1312 // sprintf(syscmd, "chmod u-w %s", fn);
1318 status_line_bold("\"%s\" %s", fn, strerror(errno));
1320 status_line("\"%s\" %dL, %dC", fn, li, l);
1321 if (q == text && r == end - 1 && l == ch) {
1323 last_file_modified = -1;
1325 if ((cmd[0] == 'x' || cmd[1] == 'q' || cmd[1] == 'n'
1326 || cmd[0] == 'X' || cmd[1] == 'Q' || cmd[1] == 'N'
1333 #if ENABLE_FEATURE_VI_YANKMARK
1334 } else if (strncmp(cmd, "yank", i) == 0) { // yank lines
1335 if (b < 0) { // no addr given- use defaults
1336 q = begin_line(dot); // assume .,. for the range
1339 text_yank(q, r, YDreg);
1340 li = count_lines(q, r);
1341 status_line("Yank %d lines (%d chars) into [%c]",
1342 li, strlen(reg[YDreg]), what_reg());
1346 not_implemented(cmd);
1349 dot = bound_dot(dot); // make sure "dot" is valid
1351 #if ENABLE_FEATURE_VI_SEARCH
1353 status_line(":s expression missing delimiters");
1357 #endif /* FEATURE_VI_COLON */
1359 static void Hit_Return(void)
1364 write1("[Hit return to continue]");
1366 while ((c = get_one_char()) != '\n' && c != '\r')
1368 redraw(TRUE); // force redraw all
1371 static int next_tabstop(int col)
1373 return col + ((tabstop - 1) - (col % tabstop));
1376 //----- Synchronize the cursor to Dot --------------------------
1377 static NOINLINE void sync_cursor(char *d, int *row, int *col)
1379 char *beg_cur; // begin and end of "d" line
1383 beg_cur = begin_line(d); // first char of cur line
1385 if (beg_cur < screenbegin) {
1386 // "d" is before top line on screen
1387 // how many lines do we have to move
1388 cnt = count_lines(beg_cur, screenbegin);
1390 screenbegin = beg_cur;
1391 if (cnt > (rows - 1) / 2) {
1392 // we moved too many lines. put "dot" in middle of screen
1393 for (cnt = 0; cnt < (rows - 1) / 2; cnt++) {
1394 screenbegin = prev_line(screenbegin);
1398 char *end_scr; // begin and end of screen
1399 end_scr = end_screen(); // last char of screen
1400 if (beg_cur > end_scr) {
1401 // "d" is after bottom line on screen
1402 // how many lines do we have to move
1403 cnt = count_lines(end_scr, beg_cur);
1404 if (cnt > (rows - 1) / 2)
1405 goto sc1; // too many lines
1406 for (ro = 0; ro < cnt - 1; ro++) {
1407 // move screen begin the same amount
1408 screenbegin = next_line(screenbegin);
1409 // now, move the end of screen
1410 end_scr = next_line(end_scr);
1411 end_scr = end_line(end_scr);
1415 // "d" is on screen- find out which row
1417 for (ro = 0; ro < rows - 1; ro++) { // drive "ro" to correct row
1423 // find out what col "d" is on
1425 while (tp < d) { // drive "co" to correct column
1426 if (*tp == '\n') //vda || *tp == '\0')
1429 // handle tabs like real vi
1430 if (d == tp && cmd_mode) {
1433 co = next_tabstop(co);
1434 } else if ((unsigned char)*tp < ' ' || *tp == 0x7f) {
1435 co++; // display as ^X, use 2 columns
1441 // "co" is the column where "dot" is.
1442 // The screen has "columns" columns.
1443 // The currently displayed columns are 0+offset -- columns+ofset
1444 // |-------------------------------------------------------------|
1446 // offset | |------- columns ----------------|
1448 // If "co" is already in this range then we do not have to adjust offset
1449 // but, we do have to subtract the "offset" bias from "co".
1450 // If "co" is outside this range then we have to change "offset".
1451 // If the first char of a line is a tab the cursor will try to stay
1452 // in column 7, but we have to set offset to 0.
1454 if (co < 0 + offset) {
1457 if (co >= columns + offset) {
1458 offset = co - columns + 1;
1460 // if the first char of the line is a tab, and "dot" is sitting on it
1461 // force offset to 0.
1462 if (d == beg_cur && *d == '\t') {
1471 //----- Text Movement Routines ---------------------------------
1472 static char *begin_line(char *p) // return pointer to first char cur line
1475 p = memrchr(text, '\n', p - text);
1483 static char *end_line(char *p) // return pointer to NL of cur line
1486 p = memchr(p, '\n', end - p - 1);
1493 static char *dollar_line(char *p) // return pointer to just before NL line
1496 // Try to stay off of the Newline
1497 if (*p == '\n' && (p - begin_line(p)) > 0)
1502 static char *prev_line(char *p) // return pointer first char prev line
1504 p = begin_line(p); // goto begining of cur line
1505 if (p > text && p[-1] == '\n')
1506 p--; // step to prev line
1507 p = begin_line(p); // goto begining of prev line
1511 static char *next_line(char *p) // return pointer first char next line
1514 if (p < end - 1 && *p == '\n')
1515 p++; // step to next line
1519 //----- Text Information Routines ------------------------------
1520 static char *end_screen(void)
1525 // find new bottom line
1527 for (cnt = 0; cnt < rows - 2; cnt++)
1533 // count line from start to stop
1534 static int count_lines(char *start, char *stop)
1539 if (stop < start) { // start and stop are backwards- reverse them
1545 stop = end_line(stop);
1546 while (start <= stop && start <= end - 1) {
1547 start = end_line(start);
1555 static char *find_line(int li) // find begining of line #li
1559 for (q = text; li > 1; li--) {
1565 //----- Dot Movement Routines ----------------------------------
1566 static void dot_left(void)
1568 if (dot > text && dot[-1] != '\n')
1572 static void dot_right(void)
1574 if (dot < end - 1 && *dot != '\n')
1578 static void dot_begin(void)
1580 dot = begin_line(dot); // return pointer to first char cur line
1583 static void dot_end(void)
1585 dot = end_line(dot); // return pointer to last char cur line
1588 static char *move_to_col(char *p, int l)
1594 while (co < l && p < end) {
1595 if (*p == '\n') //vda || *p == '\0')
1598 co = next_tabstop(co);
1599 } else if (*p < ' ' || *p == 127) {
1600 co++; // display as ^X, use 2 columns
1608 static void dot_next(void)
1610 dot = next_line(dot);
1613 static void dot_prev(void)
1615 dot = prev_line(dot);
1618 static void dot_scroll(int cnt, int dir)
1622 for (; cnt > 0; cnt--) {
1625 // ctrl-Y scroll up one line
1626 screenbegin = prev_line(screenbegin);
1629 // ctrl-E scroll down one line
1630 screenbegin = next_line(screenbegin);
1633 // make sure "dot" stays on the screen so we dont scroll off
1634 if (dot < screenbegin)
1636 q = end_screen(); // find new bottom line
1638 dot = begin_line(q); // is dot is below bottom line?
1642 static void dot_skip_over_ws(void)
1645 while (isspace(*dot) && *dot != '\n' && dot < end - 1)
1649 static void dot_delete(void) // delete the char at 'dot'
1651 text_hole_delete(dot, dot);
1654 static char *bound_dot(char *p) // make sure text[0] <= P < "end"
1656 if (p >= end && end > text) {
1658 indicate_error('1');
1662 indicate_error('2');
1667 //----- Helper Utility Routines --------------------------------
1669 //----------------------------------------------------------------
1670 //----- Char Routines --------------------------------------------
1671 /* Chars that are part of a word-
1672 * 0123456789_ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz
1673 * Chars that are Not part of a word (stoppers)
1674 * !"#$%&'()*+,-./:;<=>?@[\]^`{|}~
1675 * Chars that are WhiteSpace
1676 * TAB NEWLINE VT FF RETURN SPACE
1677 * DO NOT COUNT NEWLINE AS WHITESPACE
1680 static char *new_screen(int ro, int co)
1685 screensize = ro * co + 8;
1686 screen = xmalloc(screensize);
1687 // initialize the new screen. assume this will be a empty file.
1689 // non-existent text[] lines start with a tilde (~).
1690 for (li = 1; li < ro - 1; li++) {
1691 screen[(li * co) + 0] = '~';
1696 #if ENABLE_FEATURE_VI_SEARCH
1698 # if ENABLE_FEATURE_VI_REGEX_SEARCH
1700 // search for pattern starting at p
1701 static char *char_search(char *p, const char *pat, int dir, int range)
1704 struct re_pattern_buffer preg;
1708 re_syntax_options = RE_SYNTAX_POSIX_EXTENDED;
1714 // assume a LIMITED forward search
1722 // count the number of chars to search over, forward or backward
1726 // RANGE could be negative if we are searching backwards
1729 q = (char *)re_compile_pattern(pat, strlen(pat), (struct re_pattern_buffer *)&preg);
1731 // The pattern was not compiled
1732 status_line_bold("bad search pattern: \"%s\": %s", pat, q);
1733 i = 0; // return p if pattern not compiled
1743 // search for the compiled pattern, preg, in p[]
1744 // range < 0- search backward
1745 // range > 0- search forward
1747 // re_search() < 0 not found or error
1748 // re_search() > 0 index of found pattern
1749 // struct pattern char int int int struct reg
1750 // re_search (*pattern_buffer, *string, size, start, range, *regs)
1751 i = re_search(&preg, q, size, 0, range, 0);
1754 i = 0; // return NULL if pattern not found
1757 if (dir == FORWARD) {
1767 # if ENABLE_FEATURE_VI_SETOPTS
1768 static int mycmp(const char *s1, const char *s2, int len)
1771 return strncasecmp(s1, s2, len);
1773 return strncmp(s1, s2, len);
1776 # define mycmp strncmp
1779 static char *char_search(char *p, const char *pat, int dir, int range)
1785 if (dir == FORWARD) {
1786 stop = end - 1; // assume range is p - end-1
1787 if (range == LIMITED)
1788 stop = next_line(p); // range is to next line
1789 for (start = p; start < stop; start++) {
1790 if (mycmp(start, pat, len) == 0) {
1794 } else if (dir == BACK) {
1795 stop = text; // assume range is text - p
1796 if (range == LIMITED)
1797 stop = prev_line(p); // range is to prev line
1798 for (start = p - len; start >= stop; start--) {
1799 if (mycmp(start, pat, len) == 0) {
1804 // pattern not found
1810 #endif /* FEATURE_VI_SEARCH */
1812 static char *char_insert(char *p, char c) // insert the char c at 'p'
1814 if (c == 22) { // Is this an ctrl-V?
1815 p += stupid_insert(p, '^'); // use ^ to indicate literal next
1816 refresh(FALSE); // show the ^
1821 } else if (c == 27) { // Is this an ESC?
1824 end_cmd_q(); // stop adding to q
1825 last_status_cksum = 0; // force status update
1826 if ((p[-1] != '\n') && (dot > text)) {
1829 } else if (c == erase_char || c == 8 || c == 127) { // Is this a BS
1831 if ((p[-1] != '\n') && (dot>text)) {
1833 p = text_hole_delete(p, p); // shrink buffer 1 char
1836 #if ENABLE_FEATURE_VI_SETOPTS
1837 // insert a char into text[]
1838 char *sp; // "save p"
1842 c = '\n'; // translate \r to \n
1843 #if ENABLE_FEATURE_VI_SETOPTS
1844 sp = p; // remember addr of insert
1846 p += 1 + stupid_insert(p, c); // insert the char
1847 #if ENABLE_FEATURE_VI_SETOPTS
1848 if (showmatch && strchr(")]}", *sp) != NULL) {
1851 if (autoindent && c == '\n') { // auto indent the new line
1854 q = prev_line(p); // use prev line as template
1855 len = strspn(q, " \t"); // space or tab
1858 bias = text_hole_make(p, len);
1870 // might reallocate text[]! use p += stupid_insert(p, ...),
1871 // and be careful to not use pointers into potentially freed text[]!
1872 static uintptr_t stupid_insert(char *p, char c) // stupidly insert the char c at 'p'
1875 bias = text_hole_make(p, 1);
1878 //file_modified++; - done by text_hole_make()
1882 static int find_range(char **start, char **stop, char c)
1884 char *save_dot, *p, *q, *t;
1885 int cnt, multiline = 0;
1890 if (strchr("cdy><", c)) {
1891 // these cmds operate on whole lines
1892 p = q = begin_line(p);
1893 for (cnt = 1; cnt < cmdcnt; cnt++) {
1897 } else if (strchr("^%$0bBeEfth\b\177", c)) {
1898 // These cmds operate on char positions
1899 do_cmd(c); // execute movement cmd
1901 } else if (strchr("wW", c)) {
1902 do_cmd(c); // execute movement cmd
1903 // if we are at the next word's first char
1904 // step back one char
1905 // but check the possibilities when it is true
1906 if (dot > text && ((isspace(dot[-1]) && !isspace(dot[0]))
1907 || (ispunct(dot[-1]) && !ispunct(dot[0]))
1908 || (isalnum(dot[-1]) && !isalnum(dot[0]))))
1909 dot--; // move back off of next word
1910 if (dot > text && *dot == '\n')
1911 dot--; // stay off NL
1913 } else if (strchr("H-k{", c)) {
1914 // these operate on multi-lines backwards
1915 q = end_line(dot); // find NL
1916 do_cmd(c); // execute movement cmd
1919 } else if (strchr("L+j}\r\n", c)) {
1920 // these operate on multi-lines forwards
1921 p = begin_line(dot);
1922 do_cmd(c); // execute movement cmd
1923 dot_end(); // find NL
1926 // nothing -- this causes any other values of c to
1927 // represent the one-character range under the
1928 // cursor. this is correct for ' ' and 'l', but
1929 // perhaps no others.
1938 // backward char movements don't include start position
1939 if (q > p && strchr("^0bBh\b\177", c)) q--;
1942 for (t = p; t <= q; t++) {
1955 static int st_test(char *p, int type, int dir, char *tested)
1965 if (type == S_BEFORE_WS) {
1967 test = (!isspace(c) || c == '\n');
1969 if (type == S_TO_WS) {
1971 test = (!isspace(c) || c == '\n');
1973 if (type == S_OVER_WS) {
1977 if (type == S_END_PUNCT) {
1981 if (type == S_END_ALNUM) {
1983 test = (isalnum(c) || c == '_');
1989 static char *skip_thing(char *p, int linecnt, int dir, int type)
1993 while (st_test(p, type, dir, &c)) {
1994 // make sure we limit search to correct number of lines
1995 if (c == '\n' && --linecnt < 1)
1997 if (dir >= 0 && p >= end - 1)
1999 if (dir < 0 && p <= text)
2001 p += dir; // move to next char
2006 // find matching char of pair () [] {}
2007 static char *find_pair(char *p, const char c)
2014 dir = 1; // assume forward
2016 case '(': match = ')'; break;
2017 case '[': match = ']'; break;
2018 case '{': match = '}'; break;
2019 case ')': match = '('; dir = -1; break;
2020 case ']': match = '['; dir = -1; break;
2021 case '}': match = '{'; dir = -1; break;
2023 for (q = p + dir; text <= q && q < end; q += dir) {
2024 // look for match, count levels of pairs (( ))
2026 level++; // increase pair levels
2028 level--; // reduce pair level
2030 break; // found matching pair
2033 q = NULL; // indicate no match
2037 #if ENABLE_FEATURE_VI_SETOPTS
2038 // show the matching char of a pair, () [] {}
2039 static void showmatching(char *p)
2043 // we found half of a pair
2044 q = find_pair(p, *p); // get loc of matching char
2046 indicate_error('3'); // no matching char
2048 // "q" now points to matching pair
2049 save_dot = dot; // remember where we are
2050 dot = q; // go to new loc
2051 refresh(FALSE); // let the user see it
2052 mysleep(40); // give user some time
2053 dot = save_dot; // go back to old loc
2057 #endif /* FEATURE_VI_SETOPTS */
2059 // open a hole in text[]
2060 // might reallocate text[]! use p += text_hole_make(p, ...),
2061 // and be careful to not use pointers into potentially freed text[]!
2062 static uintptr_t text_hole_make(char *p, int size) // at "p", make a 'size' byte hole
2068 end += size; // adjust the new END
2069 if (end >= (text + text_size)) {
2071 text_size += end - (text + text_size) + 10240;
2072 new_text = xrealloc(text, text_size);
2073 bias = (new_text - text);
2074 screenbegin += bias;
2078 #if ENABLE_FEATURE_VI_YANKMARK
2081 for (i = 0; i < ARRAY_SIZE(mark); i++)
2088 memmove(p + size, p, end - size - p);
2089 memset(p, ' ', size); // clear new hole
2094 // close a hole in text[]
2095 static char *text_hole_delete(char *p, char *q) // delete "p" through "q", inclusive
2100 // move forwards, from beginning
2104 if (q < p) { // they are backward- swap them
2108 hole_size = q - p + 1;
2110 if (src < text || src > end)
2112 if (dest < text || dest >= end)
2115 goto thd_atend; // just delete the end of the buffer
2116 memmove(dest, src, cnt);
2118 end = end - hole_size; // adjust the new END
2120 dest = end - 1; // make sure dest in below end-1
2122 dest = end = text; // keep pointers valid
2128 // copy text into register, then delete text.
2129 // if dist <= 0, do not include, or go past, a NewLine
2131 static char *yank_delete(char *start, char *stop, int dist, int yf)
2135 // make sure start <= stop
2137 // they are backwards, reverse them
2143 // we cannot cross NL boundaries
2147 // dont go past a NewLine
2148 for (; p + 1 <= stop; p++) {
2150 stop = p; // "stop" just before NewLine
2156 #if ENABLE_FEATURE_VI_YANKMARK
2157 text_yank(start, stop, YDreg);
2159 if (yf == YANKDEL) {
2160 p = text_hole_delete(start, stop);
2165 static void show_help(void)
2167 puts("These features are available:"
2168 #if ENABLE_FEATURE_VI_SEARCH
2169 "\n\tPattern searches with / and ?"
2171 #if ENABLE_FEATURE_VI_DOT_CMD
2172 "\n\tLast command repeat with \'.\'"
2174 #if ENABLE_FEATURE_VI_YANKMARK
2175 "\n\tLine marking with 'x"
2176 "\n\tNamed buffers with \"x"
2178 #if ENABLE_FEATURE_VI_READONLY
2179 //not implemented: "\n\tReadonly if vi is called as \"view\""
2180 //redundant: usage text says this too: "\n\tReadonly with -R command line arg"
2182 #if ENABLE_FEATURE_VI_SET
2183 "\n\tSome colon mode commands with \':\'"
2185 #if ENABLE_FEATURE_VI_SETOPTS
2186 "\n\tSettable options with \":set\""
2188 #if ENABLE_FEATURE_VI_USE_SIGNALS
2189 "\n\tSignal catching- ^C"
2190 "\n\tJob suspend and resume with ^Z"
2192 #if ENABLE_FEATURE_VI_WIN_RESIZE
2193 "\n\tAdapt to window re-sizes"
2198 #if ENABLE_FEATURE_VI_DOT_CMD
2199 static void start_new_cmd_q(char c)
2201 // get buffer for new cmd
2202 // if there is a current cmd count put it in the buffer first
2204 lmc_len = sprintf(last_modifying_cmd, "%d%c", cmdcnt, c);
2205 } else { // just save char c onto queue
2206 last_modifying_cmd[0] = c;
2212 static void end_cmd_q(void)
2214 #if ENABLE_FEATURE_VI_YANKMARK
2215 YDreg = 26; // go back to default Yank/Delete reg
2219 #endif /* FEATURE_VI_DOT_CMD */
2221 #if ENABLE_FEATURE_VI_YANKMARK \
2222 || (ENABLE_FEATURE_VI_COLON && ENABLE_FEATURE_VI_SEARCH) \
2223 || ENABLE_FEATURE_VI_CRASHME
2224 // might reallocate text[]! use p += string_insert(p, ...),
2225 // and be careful to not use pointers into potentially freed text[]!
2226 static uintptr_t string_insert(char *p, const char *s) // insert the string at 'p'
2232 bias = text_hole_make(p, i);
2235 #if ENABLE_FEATURE_VI_YANKMARK
2238 for (cnt = 0; *s != '\0'; s++) {
2242 status_line("Put %d lines (%d chars) from [%c]", cnt, i, what_reg());
2249 #if ENABLE_FEATURE_VI_YANKMARK
2250 static char *text_yank(char *p, char *q, int dest) // copy text into a register
2253 if (cnt < 0) { // they are backwards- reverse them
2257 free(reg[dest]); // if already a yank register, free it
2258 reg[dest] = xstrndup(p, cnt + 1);
2262 static char what_reg(void)
2266 c = 'D'; // default to D-reg
2267 if (0 <= YDreg && YDreg <= 25)
2268 c = 'a' + (char) YDreg;
2276 static void check_context(char cmd)
2278 // A context is defined to be "modifying text"
2279 // Any modifying command establishes a new context.
2281 if (dot < context_start || dot > context_end) {
2282 if (strchr(modifying_cmds, cmd) != NULL) {
2283 // we are trying to modify text[]- make this the current context
2284 mark[27] = mark[26]; // move cur to prev
2285 mark[26] = dot; // move local to cur
2286 context_start = prev_line(prev_line(dot));
2287 context_end = next_line(next_line(dot));
2288 //loiter= start_loiter= now;
2293 static char *swap_context(char *p) // goto new context for '' command make this the current context
2297 // the current context is in mark[26]
2298 // the previous context is in mark[27]
2299 // only swap context if other context is valid
2300 if (text <= mark[27] && mark[27] <= end - 1) {
2302 mark[27] = mark[26];
2304 p = mark[26]; // where we are going- previous context
2305 context_start = prev_line(prev_line(prev_line(p)));
2306 context_end = next_line(next_line(next_line(p)));
2310 #endif /* FEATURE_VI_YANKMARK */
2312 //----- Set terminal attributes --------------------------------
2313 static void rawmode(void)
2315 tcgetattr(0, &term_orig);
2316 term_vi = term_orig;
2317 term_vi.c_lflag &= (~ICANON & ~ECHO); // leave ISIG on - allow intr's
2318 term_vi.c_iflag &= (~IXON & ~ICRNL);
2319 term_vi.c_oflag &= (~ONLCR);
2320 term_vi.c_cc[VMIN] = 1;
2321 term_vi.c_cc[VTIME] = 0;
2322 erase_char = term_vi.c_cc[VERASE];
2323 tcsetattr_stdin_TCSANOW(&term_vi);
2326 static void cookmode(void)
2329 tcsetattr_stdin_TCSANOW(&term_orig);
2332 #if ENABLE_FEATURE_VI_USE_SIGNALS
2333 //----- Come here when we get a window resize signal ---------
2334 static void winch_sig(int sig UNUSED_PARAM)
2336 int save_errno = errno;
2337 // FIXME: do it in main loop!!!
2338 signal(SIGWINCH, winch_sig);
2339 query_screen_dimensions();
2340 new_screen(rows, columns); // get memory for virtual screen
2341 redraw(TRUE); // re-draw the screen
2345 //----- Come here when we get a continue signal -------------------
2346 static void cont_sig(int sig UNUSED_PARAM)
2348 int save_errno = errno;
2349 rawmode(); // terminal to "raw"
2350 last_status_cksum = 0; // force status update
2351 redraw(TRUE); // re-draw the screen
2353 signal(SIGTSTP, suspend_sig);
2354 signal(SIGCONT, SIG_DFL);
2355 //kill(my_pid, SIGCONT); // huh? why? we are already "continued"...
2359 //----- Come here when we get a Suspend signal -------------------
2360 static void suspend_sig(int sig UNUSED_PARAM)
2362 int save_errno = errno;
2363 go_bottom_and_clear_to_eol();
2364 cookmode(); // terminal to "cooked"
2366 signal(SIGCONT, cont_sig);
2367 signal(SIGTSTP, SIG_DFL);
2368 kill(my_pid, SIGTSTP);
2372 //----- Come here when we get a signal ---------------------------
2373 static void catch_sig(int sig)
2375 signal(SIGINT, catch_sig);
2376 siglongjmp(restart, sig);
2378 #endif /* FEATURE_VI_USE_SIGNALS */
2380 static int mysleep(int hund) // sleep for 'hund' 1/100 seconds or stdin ready
2382 struct pollfd pfd[1];
2384 pfd[0].fd = STDIN_FILENO;
2385 pfd[0].events = POLLIN;
2386 return safe_poll(pfd, 1, hund*10) > 0;
2389 //----- IO Routines --------------------------------------------
2390 static int readit(void) // read (maybe cursor) key from stdin
2395 c = read_key(STDIN_FILENO, readbuffer, /*timeout off:*/ -2);
2396 if (c == -1) { // EOF/error
2397 go_bottom_and_clear_to_eol();
2398 cookmode(); // terminal to "cooked"
2399 bb_error_msg_and_die("can't read user input");
2404 //----- IO Routines --------------------------------------------
2405 static int get_one_char(void)
2409 #if ENABLE_FEATURE_VI_DOT_CMD
2411 // we are not adding to the q.
2412 // but, we may be reading from a q
2414 // there is no current q, read from STDIN
2415 c = readit(); // get the users input
2417 // there is a queue to get chars from first
2418 // careful with correct sign expansion!
2419 c = (unsigned char)*ioq++;
2421 // the end of the q, read from STDIN
2423 ioq_start = ioq = 0;
2424 c = readit(); // get the users input
2428 // adding STDIN chars to q
2429 c = readit(); // get the users input
2430 if (lmc_len >= MAX_INPUT_LEN - 1) {
2431 status_line_bold("last_modifying_cmd overrun");
2433 // add new char to q
2434 last_modifying_cmd[lmc_len++] = c;
2438 c = readit(); // get the users input
2439 #endif /* FEATURE_VI_DOT_CMD */
2443 // Get input line (uses "status line" area)
2444 static char *get_input_line(const char *prompt)
2446 // char [MAX_INPUT_LEN]
2447 #define buf get_input_line__buf
2452 strcpy(buf, prompt);
2453 last_status_cksum = 0; // force status update
2454 go_bottom_and_clear_to_eol();
2455 write1(prompt); // write out the :, /, or ? prompt
2458 while (i < MAX_INPUT_LEN) {
2460 if (c == '\n' || c == '\r' || c == 27)
2461 break; // this is end of input
2462 if (c == erase_char || c == 8 || c == 127) {
2463 // user wants to erase prev char
2465 write1("\b \b"); // erase char on screen
2466 if (i <= 0) // user backs up before b-o-l, exit
2468 } else if (c > 0 && c < 256) { // exclude Unicode
2469 // (TODO: need to handle Unicode)
2480 static int file_size(const char *fn) // what is the byte size of "fn"
2486 if (fn && stat(fn, &st_buf) == 0) // see if file exists
2487 cnt = (int) st_buf.st_size;
2491 // might reallocate text[]!
2492 static int file_insert(const char *fn, char *p, int update_ro_status)
2496 struct stat statbuf;
2499 if (stat(fn, &statbuf) < 0) {
2500 status_line_bold("\"%s\" %s", fn, strerror(errno));
2503 if (!S_ISREG(statbuf.st_mode)) {
2504 // This is not a regular file
2505 status_line_bold("\"%s\" Not a regular file", fn);
2508 if (p < text || p > end) {
2509 status_line_bold("Trying to insert file outside of memory");
2513 // read file to buffer
2514 fd = open(fn, O_RDONLY);
2516 status_line_bold("\"%s\" %s", fn, strerror(errno));
2519 size = statbuf.st_size;
2520 p += text_hole_make(p, size);
2521 cnt = safe_read(fd, p, size);
2523 status_line_bold("\"%s\" %s", fn, strerror(errno));
2524 p = text_hole_delete(p, p + size - 1); // un-do buffer insert
2525 } else if (cnt < size) {
2526 // There was a partial read, shrink unused space text[]
2527 p = text_hole_delete(p + cnt, p + (size - cnt) - 1); // un-do buffer insert
2528 status_line_bold("can't read all of file \"%s\"", fn);
2534 #if ENABLE_FEATURE_VI_READONLY
2535 if (update_ro_status
2536 && ((access(fn, W_OK) < 0) ||
2537 /* root will always have access()
2538 * so we check fileperms too */
2539 !(statbuf.st_mode & (S_IWUSR | S_IWGRP | S_IWOTH))
2542 SET_READONLY_FILE(readonly_mode);
2548 static int file_write(char *fn, char *first, char *last)
2550 int fd, cnt, charcnt;
2553 status_line_bold("No current filename");
2556 /* By popular request we do not open file with O_TRUNC,
2557 * but instead ftruncate() it _after_ successful write.
2558 * Might reduce amount of data lost on power fail etc.
2560 fd = open(fn, (O_WRONLY | O_CREAT), 0666);
2563 cnt = last - first + 1;
2564 charcnt = full_write(fd, first, cnt);
2565 ftruncate(fd, charcnt);
2566 if (charcnt == cnt) {
2568 //file_modified = FALSE;
2576 //----- Terminal Drawing ---------------------------------------
2577 // The terminal is made up of 'rows' line of 'columns' columns.
2578 // classically this would be 24 x 80.
2579 // screen coordinates
2585 // 23,0 ... 23,79 <- status line
2587 //----- Move the cursor to row x col (count from 0, not 1) -------
2588 static void place_cursor(int row, int col, int optimize)
2590 char cm1[sizeof(CMrc) + sizeof(int)*3 * 2];
2591 #if ENABLE_FEATURE_VI_OPTIMIZE_CURSOR
2593 SZ_UP = sizeof(CMup),
2594 SZ_DN = sizeof(CMdown),
2595 SEQ_SIZE = SZ_UP > SZ_DN ? SZ_UP : SZ_DN,
2597 char cm2[SEQ_SIZE * 5 + 32]; // bigger than worst case size
2601 if (row < 0) row = 0;
2602 if (row >= rows) row = rows - 1;
2603 if (col < 0) col = 0;
2604 if (col >= columns) col = columns - 1;
2606 //----- 1. Try the standard terminal ESC sequence
2607 sprintf(cm1, CMrc, row + 1, col + 1);
2610 #if ENABLE_FEATURE_VI_OPTIMIZE_CURSOR
2611 if (optimize && col < 16) {
2613 int Rrow = last_row;
2614 int diff = Rrow - row;
2616 if (diff < -5 || diff > 5)
2619 //----- find the minimum # of chars to move cursor -------------
2620 //----- 2. Try moving with discreet chars (Newline, [back]space, ...)
2623 // move to the correct row
2624 while (row < Rrow) {
2625 // the cursor has to move up
2629 while (row > Rrow) {
2630 // the cursor has to move down
2631 strcat(cm2, CMdown);
2635 // now move to the correct column
2636 strcat(cm2, "\r"); // start at col 0
2637 // just send out orignal source char to get to correct place
2638 screenp = &screen[row * columns]; // start of screen line
2639 strncat(cm2, screenp, col);
2641 // pick the shortest cursor motion to send out
2642 if (strlen(cm2) < strlen(cm)) {
2648 #endif /* FEATURE_VI_OPTIMIZE_CURSOR */
2652 //----- Erase from cursor to end of line -----------------------
2653 static void clear_to_eol(void)
2655 write1(Ceol); // Erase from cursor to end of line
2658 static void go_bottom_and_clear_to_eol(void)
2660 place_cursor(rows - 1, 0, FALSE); // go to bottom of screen
2661 clear_to_eol(); // erase to end of line
2664 //----- Erase from cursor to end of screen -----------------------
2665 static void clear_to_eos(void)
2667 write1(Ceos); // Erase from cursor to end of screen
2670 //----- Start standout mode ------------------------------------
2671 static void standout_start(void) // send "start reverse video" sequence
2673 write1(SOs); // Start reverse video mode
2676 //----- End standout mode --------------------------------------
2677 static void standout_end(void) // send "end reverse video" sequence
2679 write1(SOn); // End reverse video mode
2682 //----- Flash the screen --------------------------------------
2683 static void flash(int h)
2685 standout_start(); // send "start reverse video" sequence
2688 standout_end(); // send "end reverse video" sequence
2692 static void Indicate_Error(void)
2694 #if ENABLE_FEATURE_VI_CRASHME
2696 return; // generate a random command
2699 write1(bell); // send out a bell character
2705 //----- Screen[] Routines --------------------------------------
2706 //----- Erase the Screen[] memory ------------------------------
2707 static void screen_erase(void)
2709 memset(screen, ' ', screensize); // clear new screen
2712 static int bufsum(char *buf, int count)
2715 char *e = buf + count;
2718 sum += (unsigned char) *buf++;
2722 //----- Draw the status line at bottom of the screen -------------
2723 static void show_status_line(void)
2725 int cnt = 0, cksum = 0;
2727 // either we already have an error or status message, or we
2729 if (!have_status_msg) {
2730 cnt = format_edit_status();
2731 cksum = bufsum(status_buffer, cnt);
2733 if (have_status_msg || ((cnt > 0 && last_status_cksum != cksum))) {
2734 last_status_cksum = cksum; // remember if we have seen this line
2735 go_bottom_and_clear_to_eol();
2736 write1(status_buffer);
2737 if (have_status_msg) {
2738 if (((int)strlen(status_buffer) - (have_status_msg - 1)) >
2740 have_status_msg = 0;
2743 have_status_msg = 0;
2745 place_cursor(crow, ccol, FALSE); // put cursor back in correct place
2750 //----- format the status buffer, the bottom line of screen ------
2751 // format status buffer, with STANDOUT mode
2752 static void status_line_bold(const char *format, ...)
2756 va_start(args, format);
2757 strcpy(status_buffer, SOs); // Terminal standout mode on
2758 vsprintf(status_buffer + sizeof(SOs)-1, format, args);
2759 strcat(status_buffer, SOn); // Terminal standout mode off
2762 have_status_msg = 1 + sizeof(SOs) + sizeof(SOn) - 2;
2765 // format status buffer
2766 static void status_line(const char *format, ...)
2770 va_start(args, format);
2771 vsprintf(status_buffer, format, args);
2774 have_status_msg = 1;
2777 // copy s to buf, convert unprintable
2778 static void print_literal(char *buf, const char *s)
2792 c_is_no_print = (c & 0x80) && !Isprint(c);
2793 if (c_is_no_print) {
2798 if (c < ' ' || c == 0x7f) {
2800 c |= '@'; /* 0x40 */
2806 if (c_is_no_print) {
2814 if (d - buf > MAX_INPUT_LEN - 10) // paranoia
2819 static void not_implemented(const char *s)
2821 char buf[MAX_INPUT_LEN];
2823 print_literal(buf, s);
2824 status_line_bold("\'%s\' is not implemented", buf);
2827 // show file status on status line
2828 static int format_edit_status(void)
2830 static const char cmd_mode_indicator[] ALIGN1 = "-IR-";
2832 #define tot format_edit_status__tot
2834 int cur, percent, ret, trunc_at;
2836 // file_modified is now a counter rather than a flag. this
2837 // helps reduce the amount of line counting we need to do.
2838 // (this will cause a mis-reporting of modified status
2839 // once every MAXINT editing operations.)
2841 // it would be nice to do a similar optimization here -- if
2842 // we haven't done a motion that could have changed which line
2843 // we're on, then we shouldn't have to do this count_lines()
2844 cur = count_lines(text, dot);
2846 // reduce counting -- the total lines can't have
2847 // changed if we haven't done any edits.
2848 if (file_modified != last_file_modified) {
2849 tot = cur + count_lines(dot, end - 1) - 1;
2850 last_file_modified = file_modified;
2853 // current line percent
2854 // ------------- ~~ ----------
2857 percent = (100 * cur) / tot;
2863 trunc_at = columns < STATUS_BUFFER_LEN-1 ?
2864 columns : STATUS_BUFFER_LEN-1;
2866 ret = snprintf(status_buffer, trunc_at+1,
2867 #if ENABLE_FEATURE_VI_READONLY
2868 "%c %s%s%s %d/%d %d%%",
2870 "%c %s%s %d/%d %d%%",
2872 cmd_mode_indicator[cmd_mode & 3],
2873 (current_filename != NULL ? current_filename : "No file"),
2874 #if ENABLE_FEATURE_VI_READONLY
2875 (readonly_mode ? " [Readonly]" : ""),
2877 (file_modified ? " [Modified]" : ""),
2880 if (ret >= 0 && ret < trunc_at)
2881 return ret; /* it all fit */
2883 return trunc_at; /* had to truncate */
2887 //----- Force refresh of all Lines -----------------------------
2888 static void redraw(int full_screen)
2890 place_cursor(0, 0, FALSE); // put cursor in correct place
2891 clear_to_eos(); // tell terminal to erase display
2892 screen_erase(); // erase the internal screen buffer
2893 last_status_cksum = 0; // force status update
2894 refresh(full_screen); // this will redraw the entire display
2898 //----- Format a text[] line into a buffer ---------------------
2899 static char* format_line(char *src /*, int li*/)
2904 char *dest = scr_out_buf; // [MAX_SCR_COLS + MAX_TABSTOP * 2]
2906 c = '~'; // char in col 0 in non-existent lines is '~'
2908 while (co < columns + tabstop) {
2909 // have we gone past the end?
2914 if ((c & 0x80) && !Isprint(c)) {
2917 if (c < ' ' || c == 0x7f) {
2921 while ((co % tabstop) != (tabstop - 1)) {
2929 c += '@'; // Ctrl-X -> 'X'
2934 // discard scrolled-off-to-the-left portion,
2935 // in tabstop-sized pieces
2936 if (ofs >= tabstop && co >= tabstop) {
2937 memmove(dest, dest + tabstop, co);
2944 // check "short line, gigantic offset" case
2947 // discard last scrolled off part
2950 // fill the rest with spaces
2952 memset(&dest[co], ' ', columns - co);
2956 //----- Refresh the changed screen lines -----------------------
2957 // Copy the source line from text[] into the buffer and note
2958 // if the current screenline is different from the new buffer.
2959 // If they differ then that line needs redrawing on the terminal.
2961 static void refresh(int full_screen)
2963 #define old_offset refresh__old_offset
2966 char *tp, *sp; // pointer into text[] and screen[]
2968 if (ENABLE_FEATURE_VI_WIN_RESIZE IF_FEATURE_VI_ASK_TERMINAL(&& !G.get_rowcol_error) ) {
2969 unsigned c = columns, r = rows;
2970 query_screen_dimensions();
2971 full_screen |= (c - columns) | (r - rows);
2973 sync_cursor(dot, &crow, &ccol); // where cursor will be (on "dot")
2974 tp = screenbegin; // index into text[] of top line
2976 // compare text[] to screen[] and mark screen[] lines that need updating
2977 for (li = 0; li < rows - 1; li++) {
2978 int cs, ce; // column start & end
2980 // format current text line
2981 out_buf = format_line(tp /*, li*/);
2983 // skip to the end of the current text[] line
2985 char *t = memchr(tp, '\n', end - tp);
2986 if (!t) t = end - 1;
2990 // see if there are any changes between vitual screen and out_buf
2991 changed = FALSE; // assume no change
2994 sp = &screen[li * columns]; // start of screen line
2996 // force re-draw of every single column from 0 - columns-1
2999 // compare newly formatted buffer with virtual screen
3000 // look forward for first difference between buf and screen
3001 for (; cs <= ce; cs++) {
3002 if (out_buf[cs] != sp[cs]) {
3003 changed = TRUE; // mark for redraw
3008 // look backward for last difference between out_buf and screen
3009 for (; ce >= cs; ce--) {
3010 if (out_buf[ce] != sp[ce]) {
3011 changed = TRUE; // mark for redraw
3015 // now, cs is index of first diff, and ce is index of last diff
3017 // if horz offset has changed, force a redraw
3018 if (offset != old_offset) {
3023 // make a sanity check of columns indexes
3025 if (ce > columns - 1) ce = columns - 1;
3026 if (cs > ce) { cs = 0; ce = columns - 1; }
3027 // is there a change between vitual screen and out_buf
3029 // copy changed part of buffer to virtual screen
3030 memcpy(sp+cs, out_buf+cs, ce-cs+1);
3032 // move cursor to column of first change
3033 //if (offset != old_offset) {
3034 // // place_cursor is still too stupid
3035 // // to handle offsets correctly
3036 // place_cursor(li, cs, FALSE);
3038 place_cursor(li, cs, TRUE);
3041 // write line out to terminal
3042 fwrite(&sp[cs], ce - cs + 1, 1, stdout);
3046 place_cursor(crow, ccol, TRUE);
3048 old_offset = offset;
3052 //---------------------------------------------------------------------
3053 //----- the Ascii Chart -----------------------------------------------
3055 // 00 nul 01 soh 02 stx 03 etx 04 eot 05 enq 06 ack 07 bel
3056 // 08 bs 09 ht 0a nl 0b vt 0c np 0d cr 0e so 0f si
3057 // 10 dle 11 dc1 12 dc2 13 dc3 14 dc4 15 nak 16 syn 17 etb
3058 // 18 can 19 em 1a sub 1b esc 1c fs 1d gs 1e rs 1f us
3059 // 20 sp 21 ! 22 " 23 # 24 $ 25 % 26 & 27 '
3060 // 28 ( 29 ) 2a * 2b + 2c , 2d - 2e . 2f /
3061 // 30 0 31 1 32 2 33 3 34 4 35 5 36 6 37 7
3062 // 38 8 39 9 3a : 3b ; 3c < 3d = 3e > 3f ?
3063 // 40 @ 41 A 42 B 43 C 44 D 45 E 46 F 47 G
3064 // 48 H 49 I 4a J 4b K 4c L 4d M 4e N 4f O
3065 // 50 P 51 Q 52 R 53 S 54 T 55 U 56 V 57 W
3066 // 58 X 59 Y 5a Z 5b [ 5c \ 5d ] 5e ^ 5f _
3067 // 60 ` 61 a 62 b 63 c 64 d 65 e 66 f 67 g
3068 // 68 h 69 i 6a j 6b k 6c l 6d m 6e n 6f o
3069 // 70 p 71 q 72 r 73 s 74 t 75 u 76 v 77 w
3070 // 78 x 79 y 7a z 7b { 7c | 7d } 7e ~ 7f del
3071 //---------------------------------------------------------------------
3073 //----- Execute a Vi Command -----------------------------------
3074 static void do_cmd(int c)
3076 char *p, *q, *save_dot;
3082 // c1 = c; // quiet the compiler
3083 // cnt = yf = 0; // quiet the compiler
3084 // p = q = save_dot = buf; // quiet the compiler
3085 memset(buf, '\0', sizeof(buf));
3089 /* if this is a cursor key, skip these checks */
3097 case KEYCODE_PAGEUP:
3098 case KEYCODE_PAGEDOWN:
3099 case KEYCODE_DELETE:
3103 if (cmd_mode == 2) {
3104 // flip-flop Insert/Replace mode
3105 if (c == KEYCODE_INSERT)
3107 // we are 'R'eplacing the current *dot with new char
3109 // don't Replace past E-o-l
3110 cmd_mode = 1; // convert to insert
3112 if (1 <= c || Isprint(c)) {
3114 dot = yank_delete(dot, dot, 0, YANKDEL); // delete char
3115 dot = char_insert(dot, c); // insert new char
3120 if (cmd_mode == 1) {
3121 // hitting "Insert" twice means "R" replace mode
3122 if (c == KEYCODE_INSERT) goto dc5;
3123 // insert the char c at "dot"
3124 if (1 <= c || Isprint(c)) {
3125 dot = char_insert(dot, c);
3140 #if ENABLE_FEATURE_VI_CRASHME
3141 case 0x14: // dc4 ctrl-T
3142 crashme = (crashme == 0) ? 1 : 0;
3171 //case 'u': // u- FIXME- there is no undo
3173 default: // unrecognized command
3176 not_implemented(buf);
3177 end_cmd_q(); // stop adding to q
3178 case 0x00: // nul- ignore
3180 case 2: // ctrl-B scroll up full screen
3181 case KEYCODE_PAGEUP: // Cursor Key Page Up
3182 dot_scroll(rows - 2, -1);
3184 case 4: // ctrl-D scroll down half screen
3185 dot_scroll((rows - 2) / 2, 1);
3187 case 5: // ctrl-E scroll down one line
3190 case 6: // ctrl-F scroll down full screen
3191 case KEYCODE_PAGEDOWN: // Cursor Key Page Down
3192 dot_scroll(rows - 2, 1);
3194 case 7: // ctrl-G show current status
3195 last_status_cksum = 0; // force status update
3197 case 'h': // h- move left
3198 case KEYCODE_LEFT: // cursor key Left
3199 case 8: // ctrl-H- move left (This may be ERASE char)
3200 case 0x7f: // DEL- move left (This may be ERASE char)
3203 } while (--cmdcnt > 0);
3205 case 10: // Newline ^J
3206 case 'j': // j- goto next line, same col
3207 case KEYCODE_DOWN: // cursor key Down
3209 dot_next(); // go to next B-o-l
3210 // try stay in same col
3211 dot = move_to_col(dot, ccol + offset);
3212 } while (--cmdcnt > 0);
3214 case 12: // ctrl-L force redraw whole screen
3215 case 18: // ctrl-R force redraw
3216 place_cursor(0, 0, FALSE); // put cursor in correct place
3217 clear_to_eos(); // tel terminal to erase display
3219 screen_erase(); // erase the internal screen buffer
3220 last_status_cksum = 0; // force status update
3221 refresh(TRUE); // this will redraw the entire display
3223 case 13: // Carriage Return ^M
3224 case '+': // +- goto next line
3228 } while (--cmdcnt > 0);
3230 case 21: // ctrl-U scroll up half screen
3231 dot_scroll((rows - 2) / 2, -1);
3233 case 25: // ctrl-Y scroll up one line
3239 cmd_mode = 0; // stop insrting
3241 last_status_cksum = 0; // force status update
3243 case ' ': // move right
3244 case 'l': // move right
3245 case KEYCODE_RIGHT: // Cursor Key Right
3248 } while (--cmdcnt > 0);
3250 #if ENABLE_FEATURE_VI_YANKMARK
3251 case '"': // "- name a register to use for Delete/Yank
3252 c1 = (get_one_char() | 0x20) - 'a'; // | 0x20 is tolower()
3253 if ((unsigned)c1 <= 25) { // a-z?
3259 case '\'': // '- goto a specific mark
3260 c1 = (get_one_char() | 0x20) - 'a';
3261 if ((unsigned)c1 <= 25) { // a-z?
3264 if (text <= q && q < end) {
3266 dot_begin(); // go to B-o-l
3269 } else if (c1 == '\'') { // goto previous context
3270 dot = swap_context(dot); // swap current and previous context
3271 dot_begin(); // go to B-o-l
3277 case 'm': // m- Mark a line
3278 // this is really stupid. If there are any inserts or deletes
3279 // between text[0] and dot then this mark will not point to the
3280 // correct location! It could be off by many lines!
3281 // Well..., at least its quick and dirty.
3282 c1 = (get_one_char() | 0x20) - 'a';
3283 if ((unsigned)c1 <= 25) { // a-z?
3284 // remember the line
3290 case 'P': // P- Put register before
3291 case 'p': // p- put register after
3294 status_line_bold("Nothing in register %c", what_reg());
3297 // are we putting whole lines or strings
3298 if (strchr(p, '\n') != NULL) {
3300 dot_begin(); // putting lines- Put above
3303 // are we putting after very last line?
3304 if (end_line(dot) == (end - 1)) {
3305 dot = end; // force dot to end of text[]
3307 dot_next(); // next line, then put before
3312 dot_right(); // move to right, can move to NL
3314 string_insert(dot, p); // insert the string
3315 end_cmd_q(); // stop adding to q
3317 case 'U': // U- Undo; replace current line with original version
3318 if (reg[Ureg] != NULL) {
3319 p = begin_line(dot);
3321 p = text_hole_delete(p, q); // delete cur line
3322 p += string_insert(p, reg[Ureg]); // insert orig line
3327 #endif /* FEATURE_VI_YANKMARK */
3328 case '$': // $- goto end of line
3329 case KEYCODE_END: // Cursor Key End
3331 dot = end_line(dot);
3337 case '%': // %- find matching char of pair () [] {}
3338 for (q = dot; q < end && *q != '\n'; q++) {
3339 if (strchr("()[]{}", *q) != NULL) {
3340 // we found half of a pair
3341 p = find_pair(q, *q);
3353 case 'f': // f- forward to a user specified char
3354 last_forward_char = get_one_char(); // get the search char
3356 // dont separate these two commands. 'f' depends on ';'
3358 //**** fall through to ... ';'
3359 case ';': // ;- look at rest of line for last forward char
3361 if (last_forward_char == 0)
3364 while (q < end - 1 && *q != '\n' && *q != last_forward_char) {
3367 if (*q == last_forward_char)
3369 } while (--cmdcnt > 0);
3371 case ',': // repeat latest 'f' in opposite direction
3372 if (last_forward_char == 0)
3376 while (q >= text && *q != '\n' && *q != last_forward_char) {
3379 if (q >= text && *q == last_forward_char)
3381 } while (--cmdcnt > 0);
3384 case '-': // -- goto prev line
3388 } while (--cmdcnt > 0);
3390 #if ENABLE_FEATURE_VI_DOT_CMD
3391 case '.': // .- repeat the last modifying command
3392 // Stuff the last_modifying_cmd back into stdin
3393 // and let it be re-executed.
3395 last_modifying_cmd[lmc_len] = 0;
3396 ioq = ioq_start = xstrdup(last_modifying_cmd);
3400 #if ENABLE_FEATURE_VI_SEARCH
3401 case '?': // /- search for a pattern
3402 case '/': // /- search for a pattern
3405 q = get_input_line(buf); // get input line- use "status line"
3406 if (q[0] && !q[1]) {
3407 if (last_search_pattern[0])
3408 last_search_pattern[0] = c;
3409 goto dc3; // if no pat re-use old pat
3411 if (q[0]) { // strlen(q) > 1: new pat- save it and find
3412 // there is a new pat
3413 free(last_search_pattern);
3414 last_search_pattern = xstrdup(q);
3415 goto dc3; // now find the pattern
3417 // user changed mind and erased the "/"- do nothing
3419 case 'N': // N- backward search for last pattern
3420 dir = BACK; // assume BACKWARD search
3422 if (last_search_pattern[0] == '?') {
3426 goto dc4; // now search for pattern
3428 case 'n': // n- repeat search for last pattern
3429 // search rest of text[] starting at next char
3430 // if search fails return orignal "p" not the "p+1" address
3434 dir = FORWARD; // assume FORWARD search
3436 if (last_search_pattern[0] == '?') {
3441 q = char_search(p, last_search_pattern + 1, dir, FULL);
3443 dot = q; // good search, update "dot"
3447 // no pattern found between "dot" and "end"- continue at top
3452 q = char_search(p, last_search_pattern + 1, dir, FULL);
3453 if (q != NULL) { // found something
3454 dot = q; // found new pattern- goto it
3455 msg = "search hit BOTTOM, continuing at TOP";
3457 msg = "search hit TOP, continuing at BOTTOM";
3460 msg = "Pattern not found";
3464 status_line_bold("%s", msg);
3465 } while (--cmdcnt > 0);
3467 case '{': // {- move backward paragraph
3468 q = char_search(dot, "\n\n", BACK, FULL);
3469 if (q != NULL) { // found blank line
3470 dot = next_line(q); // move to next blank line
3473 case '}': // }- move forward paragraph
3474 q = char_search(dot, "\n\n", FORWARD, FULL);
3475 if (q != NULL) { // found blank line
3476 dot = next_line(q); // move to next blank line
3479 #endif /* FEATURE_VI_SEARCH */
3480 case '0': // 0- goto begining of line
3490 if (c == '0' && cmdcnt < 1) {
3491 dot_begin(); // this was a standalone zero
3493 cmdcnt = cmdcnt * 10 + (c - '0'); // this 0 is part of a number
3496 case ':': // :- the colon mode commands
3497 p = get_input_line(":"); // get input line- use "status line"
3498 #if ENABLE_FEATURE_VI_COLON
3499 colon(p); // execute the command
3502 p++; // move past the ':'
3506 if (strncmp(p, "quit", cnt) == 0
3507 || strncmp(p, "q!", cnt) == 0 // delete lines
3509 if (file_modified && p[1] != '!') {
3510 status_line_bold("No write since last change (:quit! overrides)");
3514 } else if (strncmp(p, "write", cnt) == 0
3515 || strncmp(p, "wq", cnt) == 0
3516 || strncmp(p, "wn", cnt) == 0
3517 || (p[0] == 'x' && !p[1])
3519 cnt = file_write(current_filename, text, end - 1);
3522 status_line_bold("Write error: %s", strerror(errno));
3525 last_file_modified = -1;
3526 status_line("\"%s\" %dL, %dC", current_filename, count_lines(text, end - 1), cnt);
3527 if (p[0] == 'x' || p[1] == 'q' || p[1] == 'n'
3528 || p[0] == 'X' || p[1] == 'Q' || p[1] == 'N'
3533 } else if (strncmp(p, "file", cnt) == 0) {
3534 last_status_cksum = 0; // force status update
3535 } else if (sscanf(p, "%d", &j) > 0) {
3536 dot = find_line(j); // go to line # j
3538 } else { // unrecognized cmd
3541 #endif /* !FEATURE_VI_COLON */
3543 case '<': // <- Left shift something
3544 case '>': // >- Right shift something
3545 cnt = count_lines(text, dot); // remember what line we are on
3546 c1 = get_one_char(); // get the type of thing to delete
3547 find_range(&p, &q, c1);
3548 yank_delete(p, q, 1, YANKONLY); // save copy before change
3551 i = count_lines(p, q); // # of lines we are shifting
3552 for ( ; i > 0; i--, p = next_line(p)) {
3554 // shift left- remove tab or 8 spaces
3556 // shrink buffer 1 char
3557 text_hole_delete(p, p);
3558 } else if (*p == ' ') {
3559 // we should be calculating columns, not just SPACE
3560 for (j = 0; *p == ' ' && j < tabstop; j++) {
3561 text_hole_delete(p, p);
3564 } else if (c == '>') {
3565 // shift right -- add tab or 8 spaces
3566 char_insert(p, '\t');
3569 dot = find_line(cnt); // what line were we on
3571 end_cmd_q(); // stop adding to q
3573 case 'A': // A- append at e-o-l
3574 dot_end(); // go to e-o-l
3575 //**** fall through to ... 'a'
3576 case 'a': // a- append after current char
3581 case 'B': // B- back a blank-delimited Word
3582 case 'E': // E- end of a blank-delimited word
3583 case 'W': // W- forward a blank-delimited word
3588 if (c == 'W' || isspace(dot[dir])) {
3589 dot = skip_thing(dot, 1, dir, S_TO_WS);
3590 dot = skip_thing(dot, 2, dir, S_OVER_WS);
3593 dot = skip_thing(dot, 1, dir, S_BEFORE_WS);
3594 } while (--cmdcnt > 0);
3596 case 'C': // C- Change to e-o-l
3597 case 'D': // D- delete to e-o-l
3599 dot = dollar_line(dot); // move to before NL
3600 // copy text into a register and delete
3601 dot = yank_delete(save_dot, dot, 0, YANKDEL); // delete to e-o-l
3603 goto dc_i; // start inserting
3604 #if ENABLE_FEATURE_VI_DOT_CMD
3606 end_cmd_q(); // stop adding to q
3609 case 'g': // 'gg' goto a line number (vim) (default: very first line)
3610 c1 = get_one_char();
3613 buf[1] = c1; // TODO: if Unicode?
3615 not_implemented(buf);
3621 case 'G': // G- goto to a line number (default= E-O-F)
3622 dot = end - 1; // assume E-O-F
3624 dot = find_line(cmdcnt); // what line is #cmdcnt
3628 case 'H': // H- goto top line on screen
3630 if (cmdcnt > (rows - 1)) {
3631 cmdcnt = (rows - 1);
3638 case 'I': // I- insert before first non-blank
3641 //**** fall through to ... 'i'
3642 case 'i': // i- insert before current char
3643 case KEYCODE_INSERT: // Cursor Key Insert
3645 cmd_mode = 1; // start inserting
3647 case 'J': // J- join current and next lines together
3649 dot_end(); // move to NL
3650 if (dot < end - 1) { // make sure not last char in text[]
3651 *dot++ = ' '; // replace NL with space
3653 while (isblank(*dot)) { // delete leading WS
3657 } while (--cmdcnt > 0);
3658 end_cmd_q(); // stop adding to q
3660 case 'L': // L- goto bottom line on screen
3662 if (cmdcnt > (rows - 1)) {
3663 cmdcnt = (rows - 1);
3671 case 'M': // M- goto middle line on screen
3673 for (cnt = 0; cnt < (rows-1) / 2; cnt++)
3674 dot = next_line(dot);
3676 case 'O': // O- open a empty line above
3678 p = begin_line(dot);
3679 if (p[-1] == '\n') {
3681 case 'o': // o- open a empty line below; Yes, I know it is in the middle of the "if (..."
3683 dot = char_insert(dot, '\n');
3686 dot = char_insert(dot, '\n'); // i\n ESC
3691 case 'R': // R- continuous Replace char
3695 case KEYCODE_DELETE:
3698 case 'X': // X- delete char before dot
3699 case 'x': // x- delete the current char
3700 case 's': // s- substitute the current char
3705 if (dot[dir] != '\n') {
3707 dot--; // delete prev char
3708 dot = yank_delete(dot, dot, 0, YANKDEL); // delete char
3710 } while (--cmdcnt > 0);
3711 end_cmd_q(); // stop adding to q
3713 goto dc_i; // start inserting
3715 case 'Z': // Z- if modified, {write}; exit
3716 // ZZ means to save file (if necessary), then exit
3717 c1 = get_one_char();
3722 if (file_modified) {
3723 if (ENABLE_FEATURE_VI_READONLY && readonly_mode) {
3724 status_line_bold("\"%s\" File is read only", current_filename);
3727 cnt = file_write(current_filename, text, end - 1);
3730 status_line_bold("Write error: %s", strerror(errno));
3731 } else if (cnt == (end - 1 - text + 1)) {
3738 case '^': // ^- move to first non-blank on line
3742 case 'b': // b- back a word
3743 case 'e': // e- end of word
3748 if ((dot + dir) < text || (dot + dir) > end - 1)
3751 if (isspace(*dot)) {
3752 dot = skip_thing(dot, (c == 'e') ? 2 : 1, dir, S_OVER_WS);
3754 if (isalnum(*dot) || *dot == '_') {
3755 dot = skip_thing(dot, 1, dir, S_END_ALNUM);
3756 } else if (ispunct(*dot)) {
3757 dot = skip_thing(dot, 1, dir, S_END_PUNCT);
3759 } while (--cmdcnt > 0);
3761 case 'c': // c- change something
3762 case 'd': // d- delete something
3763 #if ENABLE_FEATURE_VI_YANKMARK
3764 case 'y': // y- yank something
3765 case 'Y': // Y- Yank a line
3768 int yf, ml, whole = 0;
3769 yf = YANKDEL; // assume either "c" or "d"
3770 #if ENABLE_FEATURE_VI_YANKMARK
3771 if (c == 'y' || c == 'Y')
3776 c1 = get_one_char(); // get the type of thing to delete
3777 // determine range, and whether it spans lines
3778 ml = find_range(&p, &q, c1);
3779 if (c1 == 27) { // ESC- user changed mind and wants out
3780 c = c1 = 27; // Escape- do nothing
3781 } else if (strchr("wW", c1)) {
3783 // don't include trailing WS as part of word
3784 while (isblank(*q)) {
3785 if (q <= text || q[-1] == '\n')
3790 dot = yank_delete(p, q, ml, yf); // delete word
3791 } else if (strchr("^0bBeEft%$ lh\b\177", c1)) {
3792 // partial line copy text into a register and delete
3793 dot = yank_delete(p, q, ml, yf); // delete word
3794 } else if (strchr("cdykjHL+-{}\r\n", c1)) {
3795 // whole line copy text into a register and delete
3796 dot = yank_delete(p, q, ml, yf); // delete lines
3799 // could not recognize object
3800 c = c1 = 27; // error-
3806 dot = char_insert(dot, '\n');
3807 // on the last line of file don't move to prev line
3808 if (whole && dot != (end-1)) {
3811 } else if (c == 'd') {
3817 // if CHANGING, not deleting, start inserting after the delete
3819 strcpy(buf, "Change");
3820 goto dc_i; // start inserting
3823 strcpy(buf, "Delete");
3825 #if ENABLE_FEATURE_VI_YANKMARK
3826 if (c == 'y' || c == 'Y') {
3827 strcpy(buf, "Yank");
3831 for (cnt = 0; p <= q; p++) {
3835 status_line("%s %d lines (%d chars) using [%c]",
3836 buf, cnt, strlen(reg[YDreg]), what_reg());
3838 end_cmd_q(); // stop adding to q
3842 case 'k': // k- goto prev line, same col
3843 case KEYCODE_UP: // cursor key Up
3846 dot = move_to_col(dot, ccol + offset); // try stay in same col
3847 } while (--cmdcnt > 0);
3849 case 'r': // r- replace the current char with user input
3850 c1 = get_one_char(); // get the replacement char
3855 end_cmd_q(); // stop adding to q
3857 case 't': // t- move to char prior to next x
3858 last_forward_char = get_one_char();
3860 if (*dot == last_forward_char)
3862 last_forward_char = 0;
3864 case 'w': // w- forward a word
3866 if (isalnum(*dot) || *dot == '_') { // we are on ALNUM
3867 dot = skip_thing(dot, 1, FORWARD, S_END_ALNUM);
3868 } else if (ispunct(*dot)) { // we are on PUNCT
3869 dot = skip_thing(dot, 1, FORWARD, S_END_PUNCT);
3872 dot++; // move over word
3873 if (isspace(*dot)) {
3874 dot = skip_thing(dot, 2, FORWARD, S_OVER_WS);
3876 } while (--cmdcnt > 0);
3879 c1 = get_one_char(); // get the replacement char
3882 cnt = (rows - 2) / 2; // put dot at center
3884 cnt = rows - 2; // put dot at bottom
3885 screenbegin = begin_line(dot); // start dot at top
3886 dot_scroll(cnt, -1);
3888 case '|': // |- move to column "cmdcnt"
3889 dot = move_to_col(dot, cmdcnt - 1); // try to move to column
3891 case '~': // ~- flip the case of letters a-z -> A-Z
3893 if (islower(*dot)) {
3894 *dot = toupper(*dot);
3896 } else if (isupper(*dot)) {
3897 *dot = tolower(*dot);
3901 } while (--cmdcnt > 0);
3902 end_cmd_q(); // stop adding to q
3904 //----- The Cursor and Function Keys -----------------------------
3905 case KEYCODE_HOME: // Cursor Key Home
3908 // The Fn keys could point to do_macro which could translate them
3910 case KEYCODE_FUN1: // Function Key F1
3911 case KEYCODE_FUN2: // Function Key F2
3912 case KEYCODE_FUN3: // Function Key F3
3913 case KEYCODE_FUN4: // Function Key F4
3914 case KEYCODE_FUN5: // Function Key F5
3915 case KEYCODE_FUN6: // Function Key F6
3916 case KEYCODE_FUN7: // Function Key F7
3917 case KEYCODE_FUN8: // Function Key F8
3918 case KEYCODE_FUN9: // Function Key F9
3919 case KEYCODE_FUN10: // Function Key F10
3920 case KEYCODE_FUN11: // Function Key F11
3921 case KEYCODE_FUN12: // Function Key F12
3927 // if text[] just became empty, add back an empty line
3929 char_insert(text, '\n'); // start empty buf with dummy line
3932 // it is OK for dot to exactly equal to end, otherwise check dot validity
3934 dot = bound_dot(dot); // make sure "dot" is valid
3936 #if ENABLE_FEATURE_VI_YANKMARK
3937 check_context(c); // update the current context
3941 cmdcnt = 0; // cmd was not a number, reset cmdcnt
3942 cnt = dot - begin_line(dot);
3943 // Try to stay off of the Newline
3944 if (*dot == '\n' && cnt > 0 && cmd_mode == 0)
3948 /* NB! the CRASHME code is unmaintained, and doesn't currently build */
3949 #if ENABLE_FEATURE_VI_CRASHME
3950 static int totalcmds = 0;
3951 static int Mp = 85; // Movement command Probability
3952 static int Np = 90; // Non-movement command Probability
3953 static int Dp = 96; // Delete command Probability
3954 static int Ip = 97; // Insert command Probability
3955 static int Yp = 98; // Yank command Probability
3956 static int Pp = 99; // Put command Probability
3957 static int M = 0, N = 0, I = 0, D = 0, Y = 0, P = 0, U = 0;
3958 static const char chars[20] = "\t012345 abcdABCD-=.$";
3959 static const char *const words[20] = {
3960 "this", "is", "a", "test",
3961 "broadcast", "the", "emergency", "of",
3962 "system", "quick", "brown", "fox",
3963 "jumped", "over", "lazy", "dogs",
3964 "back", "January", "Febuary", "March"
3966 static const char *const lines[20] = {
3967 "You should have received a copy of the GNU General Public License\n",
3968 "char c, cm, *cmd, *cmd1;\n",
3969 "generate a command by percentages\n",
3970 "Numbers may be typed as a prefix to some commands.\n",
3971 "Quit, discarding changes!\n",
3972 "Forced write, if permission originally not valid.\n",
3973 "In general, any ex or ed command (such as substitute or delete).\n",
3974 "I have tickets available for the Blazers vs LA Clippers for Monday, Janurary 1 at 1:00pm.\n",
3975 "Please get w/ me and I will go over it with you.\n",
3976 "The following is a list of scheduled, committed changes.\n",
3977 "1. Launch Norton Antivirus (Start, Programs, Norton Antivirus)\n",
3978 "Reminder....Town Meeting in Central Perk cafe today at 3:00pm.\n",
3979 "Any question about transactions please contact Sterling Huxley.\n",
3980 "I will try to get back to you by Friday, December 31.\n",
3981 "This Change will be implemented on Friday.\n",
3982 "Let me know if you have problems accessing this;\n",
3983 "Sterling Huxley recently added you to the access list.\n",
3984 "Would you like to go to lunch?\n",
3985 "The last command will be automatically run.\n",
3986 "This is too much english for a computer geek.\n",
3988 static char *multilines[20] = {
3989 "You should have received a copy of the GNU General Public License\n",
3990 "char c, cm, *cmd, *cmd1;\n",
3991 "generate a command by percentages\n",
3992 "Numbers may be typed as a prefix to some commands.\n",
3993 "Quit, discarding changes!\n",
3994 "Forced write, if permission originally not valid.\n",
3995 "In general, any ex or ed command (such as substitute or delete).\n",
3996 "I have tickets available for the Blazers vs LA Clippers for Monday, Janurary 1 at 1:00pm.\n",
3997 "Please get w/ me and I will go over it with you.\n",
3998 "The following is a list of scheduled, committed changes.\n",
3999 "1. Launch Norton Antivirus (Start, Programs, Norton Antivirus)\n",
4000 "Reminder....Town Meeting in Central Perk cafe today at 3:00pm.\n",
4001 "Any question about transactions please contact Sterling Huxley.\n",
4002 "I will try to get back to you by Friday, December 31.\n",
4003 "This Change will be implemented on Friday.\n",
4004 "Let me know if you have problems accessing this;\n",
4005 "Sterling Huxley recently added you to the access list.\n",
4006 "Would you like to go to lunch?\n",
4007 "The last command will be automatically run.\n",
4008 "This is too much english for a computer geek.\n",
4011 // create a random command to execute
4012 static void crash_dummy()
4014 static int sleeptime; // how long to pause between commands
4015 char c, cm, *cmd, *cmd1;
4016 int i, cnt, thing, rbi, startrbi, percent;
4018 // "dot" movement commands
4019 cmd1 = " \n\r\002\004\005\006\025\0310^$-+wWeEbBhjklHL";
4021 // is there already a command running?
4022 if (readbuffer[0] > 0)
4025 readbuffer[0] = 'X';
4027 sleeptime = 0; // how long to pause between commands
4028 memset(readbuffer, '\0', sizeof(readbuffer));
4029 // generate a command by percentages
4030 percent = (int) lrand48() % 100; // get a number from 0-99
4031 if (percent < Mp) { // Movement commands
4032 // available commands
4035 } else if (percent < Np) { // non-movement commands
4036 cmd = "mz<>\'\""; // available commands
4038 } else if (percent < Dp) { // Delete commands
4039 cmd = "dx"; // available commands
4041 } else if (percent < Ip) { // Inset commands
4042 cmd = "iIaAsrJ"; // available commands
4044 } else if (percent < Yp) { // Yank commands
4045 cmd = "yY"; // available commands
4047 } else if (percent < Pp) { // Put commands
4048 cmd = "pP"; // available commands
4051 // We do not know how to handle this command, try again
4055 // randomly pick one of the available cmds from "cmd[]"
4056 i = (int) lrand48() % strlen(cmd);
4058 if (strchr(":\024", cm))
4059 goto cd0; // dont allow colon or ctrl-T commands
4060 readbuffer[rbi++] = cm; // put cmd into input buffer
4062 // now we have the command-
4063 // there are 1, 2, and multi char commands
4064 // find out which and generate the rest of command as necessary
4065 if (strchr("dmryz<>\'\"", cm)) { // 2-char commands
4066 cmd1 = " \n\r0$^-+wWeEbBhjklHL";
4067 if (cm == 'm' || cm == '\'' || cm == '\"') { // pick a reg[]
4068 cmd1 = "abcdefghijklmnopqrstuvwxyz";
4070 thing = (int) lrand48() % strlen(cmd1); // pick a movement command
4072 readbuffer[rbi++] = c; // add movement to input buffer
4074 if (strchr("iIaAsc", cm)) { // multi-char commands
4076 // change some thing
4077 thing = (int) lrand48() % strlen(cmd1); // pick a movement command
4079 readbuffer[rbi++] = c; // add movement to input buffer
4081 thing = (int) lrand48() % 4; // what thing to insert
4082 cnt = (int) lrand48() % 10; // how many to insert
4083 for (i = 0; i < cnt; i++) {
4084 if (thing == 0) { // insert chars
4085 readbuffer[rbi++] = chars[((int) lrand48() % strlen(chars))];
4086 } else if (thing == 1) { // insert words
4087 strcat(readbuffer, words[(int) lrand48() % 20]);
4088 strcat(readbuffer, " ");
4089 sleeptime = 0; // how fast to type
4090 } else if (thing == 2) { // insert lines
4091 strcat(readbuffer, lines[(int) lrand48() % 20]);
4092 sleeptime = 0; // how fast to type
4093 } else { // insert multi-lines
4094 strcat(readbuffer, multilines[(int) lrand48() % 20]);
4095 sleeptime = 0; // how fast to type
4098 strcat(readbuffer, "\033");
4100 readbuffer[0] = strlen(readbuffer + 1);
4104 mysleep(sleeptime); // sleep 1/100 sec
4107 // test to see if there are any errors
4108 static void crash_test()
4110 static time_t oldtim;
4117 strcat(msg, "end<text ");
4119 if (end > textend) {
4120 strcat(msg, "end>textend ");
4123 strcat(msg, "dot<text ");
4126 strcat(msg, "dot>end ");
4128 if (screenbegin < text) {
4129 strcat(msg, "screenbegin<text ");
4131 if (screenbegin > end - 1) {
4132 strcat(msg, "screenbegin>end-1 ");
4136 printf("\n\n%d: \'%c\' %s\n\n\n%s[Hit return to continue]%s",
4137 totalcmds, last_input_char, msg, SOs, SOn);
4139 while (safe_read(STDIN_FILENO, d, 1) > 0) {
4140 if (d[0] == '\n' || d[0] == '\r')
4145 if (tim >= (oldtim + 3)) {
4146 sprintf(status_buffer,
4147 "Tot=%d: M=%d N=%d I=%d D=%d Y=%d P=%d U=%d size=%d",
4148 totalcmds, M, N, I, D, Y, P, U, end - text + 1);