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 the GPL v2 or later, see the file LICENSE in this tarball.
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"
26 /* the CRASHME code is unmaintained, and doesn't currently build */
27 #define ENABLE_FEATURE_VI_CRASHME 0
30 #if ENABLE_LOCALE_SUPPORT
32 #if ENABLE_FEATURE_VI_8BIT
33 //FIXME: this does not work properly for Unicode anyway
34 # define Isprint(c) (isprint)(c)
36 # define Isprint(c) isprint_asciionly(c)
41 /* 0x9b is Meta-ESC */
42 #if ENABLE_FEATURE_VI_8BIT
43 #define Isprint(c) ((unsigned char)(c) >= ' ' && (c) != 0x7f && (unsigned char)(c) != 0x9b)
45 #define Isprint(c) ((unsigned char)(c) >= ' ' && (unsigned char)(c) < 0x7f)
52 MAX_TABSTOP = 32, // sanity limit
53 // User input len. Need not be extra big.
54 // Lines in file being edited *can* be bigger than this.
56 // Sanity limits. We have only one buffer of this size.
57 MAX_SCR_COLS = CONFIG_FEATURE_VI_MAX_LEN,
58 MAX_SCR_ROWS = CONFIG_FEATURE_VI_MAX_LEN,
61 /* vt102 typical ESC sequence */
62 /* terminal standout start/normal ESC sequence */
63 static const char SOs[] ALIGN1 = "\033[7m";
64 static const char SOn[] ALIGN1 = "\033[0m";
65 /* terminal bell sequence */
66 static const char bell[] ALIGN1 = "\007";
67 /* Clear-end-of-line and Clear-end-of-screen ESC sequence */
68 static const char Ceol[] ALIGN1 = "\033[0K";
69 static const char Ceos[] ALIGN1 = "\033[0J";
70 /* Cursor motion arbitrary destination ESC sequence */
71 static const char CMrc[] ALIGN1 = "\033[%d;%dH";
72 /* Cursor motion up and down ESC sequence */
73 static const char CMup[] ALIGN1 = "\033[A";
74 static const char CMdown[] ALIGN1 = "\n";
76 #if ENABLE_FEATURE_VI_DOT_CMD || ENABLE_FEATURE_VI_YANKMARK
77 // cmds modifying text[]
78 // vda: removed "aAiIs" as they switch us into insert mode
79 // and remembering input for replay after them makes no sense
80 static const char modifying_cmds[] = "cCdDJoOpPrRxX<>~";
86 FORWARD = 1, // code depends on "1" for array index
87 BACK = -1, // code depends on "-1" for array index
88 LIMITED = 0, // how much of text[] in char_search
89 FULL = 1, // how much of text[] in char_search
91 S_BEFORE_WS = 1, // used in skip_thing() for moving "dot"
92 S_TO_WS = 2, // used in skip_thing() for moving "dot"
93 S_OVER_WS = 3, // used in skip_thing() for moving "dot"
94 S_END_PUNCT = 4, // used in skip_thing() for moving "dot"
95 S_END_ALNUM = 5, // used in skip_thing() for moving "dot"
99 /* vi.c expects chars to be unsigned. */
100 /* busybox build system provides that, but it's better */
101 /* to audit and fix the source */
104 /* many references - keep near the top of globals */
105 char *text, *end; // pointers to the user data in memory
106 char *dot; // where all the action takes place
107 int text_size; // size of the allocated buffer
111 #define VI_AUTOINDENT 1
112 #define VI_SHOWMATCH 2
113 #define VI_IGNORECASE 4
114 #define VI_ERR_METHOD 8
115 #define autoindent (vi_setops & VI_AUTOINDENT)
116 #define showmatch (vi_setops & VI_SHOWMATCH )
117 #define ignorecase (vi_setops & VI_IGNORECASE)
118 /* indicate error with beep or flash */
119 #define err_method (vi_setops & VI_ERR_METHOD)
121 #if ENABLE_FEATURE_VI_READONLY
122 smallint readonly_mode;
123 #define SET_READONLY_FILE(flags) ((flags) |= 0x01)
124 #define SET_READONLY_MODE(flags) ((flags) |= 0x02)
125 #define UNSET_READONLY_FILE(flags) ((flags) &= 0xfe)
127 #define SET_READONLY_FILE(flags) ((void)0)
128 #define SET_READONLY_MODE(flags) ((void)0)
129 #define UNSET_READONLY_FILE(flags) ((void)0)
132 smallint editing; // >0 while we are editing a file
133 // [code audit says "can be 0, 1 or 2 only"]
134 smallint cmd_mode; // 0=command 1=insert 2=replace
135 int file_modified; // buffer contents changed (counter, not flag!)
136 int last_file_modified; // = -1;
137 int fn_start; // index of first cmd line file name
138 int save_argc; // how many file names on cmd line
139 int cmdcnt; // repetition count
140 unsigned rows, columns; // the terminal screen is this size
141 int crow, ccol; // cursor is on Crow x Ccol
142 int offset; // chars scrolled off the screen to the left
143 int have_status_msg; // is default edit status needed?
144 // [don't make smallint!]
145 int last_status_cksum; // hash of current status line
146 char *current_filename;
147 char *screenbegin; // index into text[], of top line on the screen
148 char *screen; // pointer to the virtual screen buffer
149 int screensize; // and its size
151 int last_forward_char; // last char searched for with 'f' (int because of Unicode)
152 char erase_char; // the users erase character
153 char last_input_char; // last char read from user
155 #if ENABLE_FEATURE_VI_DOT_CMD
156 smallint adding2q; // are we currently adding user input to q
157 int lmc_len; // length of last_modifying_cmd
158 char *ioq, *ioq_start; // pointer to string for get_one_char to "read"
160 #if ENABLE_FEATURE_VI_OPTIMIZE_CURSOR
161 int last_row; // where the cursor was last moved to
163 #if ENABLE_FEATURE_VI_USE_SIGNALS || ENABLE_FEATURE_VI_CRASHME
166 #if ENABLE_FEATURE_VI_SEARCH
167 char *last_search_pattern; // last pattern from a '/' or '?' search
171 #if ENABLE_FEATURE_VI_YANKMARK
172 char *edit_file__cur_line;
174 int refresh__old_offset;
175 int format_edit_status__tot;
177 /* a few references only */
178 #if ENABLE_FEATURE_VI_YANKMARK
179 int YDreg, Ureg; // default delete register and orig line for "U"
180 char *reg[28]; // named register a-z, "D", and "U" 0-25,26,27
181 char *mark[28]; // user marks points somewhere in text[]- a-z and previous context ''
182 char *context_start, *context_end;
184 #if ENABLE_FEATURE_VI_USE_SIGNALS
185 sigjmp_buf restart; // catch_sig()
187 struct termios term_orig, term_vi; // remember what the cooked mode was
188 #if ENABLE_FEATURE_VI_COLON
189 char *initial_cmds[3]; // currently 2 entries, NULL terminated
191 // Should be just enough to hold a key sequence,
192 // but CRASHME mode uses it as generated command buffer too
193 #if ENABLE_FEATURE_VI_CRASHME
194 char readbuffer[128];
196 char readbuffer[KEYCODE_BUFFER_SIZE];
198 #define STATUS_BUFFER_LEN 200
199 char status_buffer[STATUS_BUFFER_LEN]; // messages to the user
200 #if ENABLE_FEATURE_VI_DOT_CMD
201 char last_modifying_cmd[MAX_INPUT_LEN]; // last modifying cmd for "."
203 char get_input_line__buf[MAX_INPUT_LEN]; /* former static */
205 char scr_out_buf[MAX_SCR_COLS + MAX_TABSTOP * 2];
207 #define G (*ptr_to_globals)
208 #define text (G.text )
209 #define text_size (G.text_size )
214 #define vi_setops (G.vi_setops )
215 #define editing (G.editing )
216 #define cmd_mode (G.cmd_mode )
217 #define file_modified (G.file_modified )
218 #define last_file_modified (G.last_file_modified )
219 #define fn_start (G.fn_start )
220 #define save_argc (G.save_argc )
221 #define cmdcnt (G.cmdcnt )
222 #define rows (G.rows )
223 #define columns (G.columns )
224 #define crow (G.crow )
225 #define ccol (G.ccol )
226 #define offset (G.offset )
227 #define status_buffer (G.status_buffer )
228 #define have_status_msg (G.have_status_msg )
229 #define last_status_cksum (G.last_status_cksum )
230 #define current_filename (G.current_filename )
231 #define screen (G.screen )
232 #define screensize (G.screensize )
233 #define screenbegin (G.screenbegin )
234 #define tabstop (G.tabstop )
235 #define last_forward_char (G.last_forward_char )
236 #define erase_char (G.erase_char )
237 #define last_input_char (G.last_input_char )
238 #if ENABLE_FEATURE_VI_READONLY
239 #define readonly_mode (G.readonly_mode )
241 #define readonly_mode 0
243 #define adding2q (G.adding2q )
244 #define lmc_len (G.lmc_len )
246 #define ioq_start (G.ioq_start )
247 #define last_row (G.last_row )
248 #define my_pid (G.my_pid )
249 #define last_search_pattern (G.last_search_pattern)
251 #define edit_file__cur_line (G.edit_file__cur_line)
252 #define refresh__old_offset (G.refresh__old_offset)
253 #define format_edit_status__tot (G.format_edit_status__tot)
255 #define YDreg (G.YDreg )
256 #define Ureg (G.Ureg )
257 #define mark (G.mark )
258 #define context_start (G.context_start )
259 #define context_end (G.context_end )
260 #define restart (G.restart )
261 #define term_orig (G.term_orig )
262 #define term_vi (G.term_vi )
263 #define initial_cmds (G.initial_cmds )
264 #define readbuffer (G.readbuffer )
265 #define scr_out_buf (G.scr_out_buf )
266 #define last_modifying_cmd (G.last_modifying_cmd )
267 #define get_input_line__buf (G.get_input_line__buf)
269 #define INIT_G() do { \
270 SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \
271 last_file_modified = -1; \
272 /* "" but has space for 2 chars: */ \
273 IF_FEATURE_VI_SEARCH(last_search_pattern = xzalloc(2);) \
277 static int init_text_buffer(char *); // init from file or create new
278 static void edit_file(char *); // edit one file
279 static void do_cmd(int); // execute a command
280 static int next_tabstop(int);
281 static void sync_cursor(char *, int *, int *); // synchronize the screen cursor to dot
282 static char *begin_line(char *); // return pointer to cur line B-o-l
283 static char *end_line(char *); // return pointer to cur line E-o-l
284 static char *prev_line(char *); // return pointer to prev line B-o-l
285 static char *next_line(char *); // return pointer to next line B-o-l
286 static char *end_screen(void); // get pointer to last char on screen
287 static int count_lines(char *, char *); // count line from start to stop
288 static char *find_line(int); // find begining of line #li
289 static char *move_to_col(char *, int); // move "p" to column l
290 static void dot_left(void); // move dot left- dont leave line
291 static void dot_right(void); // move dot right- dont leave line
292 static void dot_begin(void); // move dot to B-o-l
293 static void dot_end(void); // move dot to E-o-l
294 static void dot_next(void); // move dot to next line B-o-l
295 static void dot_prev(void); // move dot to prev line B-o-l
296 static void dot_scroll(int, int); // move the screen up or down
297 static void dot_skip_over_ws(void); // move dot pat WS
298 static void dot_delete(void); // delete the char at 'dot'
299 static char *bound_dot(char *); // make sure text[0] <= P < "end"
300 static char *new_screen(int, int); // malloc virtual screen memory
301 static char *char_insert(char *, char); // insert the char c at 'p'
302 // might reallocate text[]! use p += stupid_insert(p, ...),
303 // and be careful to not use pointers into potentially freed text[]!
304 static uintptr_t stupid_insert(char *, char); // stupidly insert the char c at 'p'
305 static int find_range(char **, char **, char); // return pointers for an object
306 static int st_test(char *, int, int, char *); // helper for skip_thing()
307 static char *skip_thing(char *, int, int, int); // skip some object
308 static char *find_pair(char *, char); // find matching pair () [] {}
309 static char *text_hole_delete(char *, char *); // at "p", delete a 'size' byte hole
310 // might reallocate text[]! use p += text_hole_make(p, ...),
311 // and be careful to not use pointers into potentially freed text[]!
312 static uintptr_t text_hole_make(char *, int); // at "p", make a 'size' byte hole
313 static char *yank_delete(char *, char *, int, int); // yank text[] into register then delete
314 static void show_help(void); // display some help info
315 static void rawmode(void); // set "raw" mode on tty
316 static void cookmode(void); // return to "cooked" mode on tty
317 // sleep for 'h' 1/100 seconds, return 1/0 if stdin is (ready for read)/(not ready)
318 static int mysleep(int);
319 static int readit(void); // read (maybe cursor) key from stdin
320 static int get_one_char(void); // read 1 char from stdin
321 static int file_size(const char *); // what is the byte size of "fn"
322 #if !ENABLE_FEATURE_VI_READONLY
323 #define file_insert(fn, p, update_ro_status) file_insert(fn, p)
325 // file_insert might reallocate text[]!
326 static int file_insert(const char *, char *, int);
327 static int file_write(char *, char *, char *);
328 #if !ENABLE_FEATURE_VI_OPTIMIZE_CURSOR
329 #define place_cursor(a, b, optimize) place_cursor(a, b)
331 static void place_cursor(int, int, int);
332 static void screen_erase(void);
333 static void clear_to_eol(void);
334 static void clear_to_eos(void);
335 static void go_bottom_and_clear_to_eol(void);
336 static void standout_start(void); // send "start reverse video" sequence
337 static void standout_end(void); // send "end reverse video" sequence
338 static void flash(int); // flash the terminal screen
339 static void show_status_line(void); // put a message on the bottom line
340 static void status_line(const char *, ...); // print to status buf
341 static void status_line_bold(const char *, ...);
342 static void not_implemented(const char *); // display "Not implemented" message
343 static int format_edit_status(void); // format file status on status line
344 static void redraw(int); // force a full screen refresh
345 static char* format_line(char* /*, int*/);
346 static void refresh(int); // update the terminal from screen[]
348 static void Indicate_Error(void); // use flash or beep to indicate error
349 #define indicate_error(c) Indicate_Error()
350 static void Hit_Return(void);
352 #if ENABLE_FEATURE_VI_SEARCH
353 static char *char_search(char *, const char *, int, int); // search for pattern starting at p
354 static int mycmp(const char *, const char *, int); // string cmp based in "ignorecase"
356 #if ENABLE_FEATURE_VI_COLON
357 static char *get_one_address(char *, int *); // get colon addr, if present
358 static char *get_address(char *, int *, int *); // get two colon addrs, if present
359 static void colon(char *); // execute the "colon" mode cmds
361 #if ENABLE_FEATURE_VI_USE_SIGNALS
362 static void winch_sig(int); // catch window size changes
363 static void suspend_sig(int); // catch ctrl-Z
364 static void catch_sig(int); // catch ctrl-C and alarm time-outs
366 #if ENABLE_FEATURE_VI_DOT_CMD
367 static void start_new_cmd_q(char); // new queue for command
368 static void end_cmd_q(void); // stop saving input chars
370 #define end_cmd_q() ((void)0)
372 #if ENABLE_FEATURE_VI_SETOPTS
373 static void showmatching(char *); // show the matching pair () [] {}
375 #if ENABLE_FEATURE_VI_YANKMARK || (ENABLE_FEATURE_VI_COLON && ENABLE_FEATURE_VI_SEARCH) || ENABLE_FEATURE_VI_CRASHME
376 // might reallocate text[]! use p += string_insert(p, ...),
377 // and be careful to not use pointers into potentially freed text[]!
378 static uintptr_t string_insert(char *, const char *); // insert the string at 'p'
380 #if ENABLE_FEATURE_VI_YANKMARK
381 static char *text_yank(char *, char *, int); // save copy of "p" into a register
382 static char what_reg(void); // what is letter of current YDreg
383 static void check_context(char); // remember context for '' command
385 #if ENABLE_FEATURE_VI_CRASHME
386 static void crash_dummy();
387 static void crash_test();
388 static int crashme = 0;
392 static void write1(const char *out)
397 int vi_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
398 int vi_main(int argc, char **argv)
404 #if ENABLE_FEATURE_VI_USE_SIGNALS || ENABLE_FEATURE_VI_CRASHME
407 #if ENABLE_FEATURE_VI_CRASHME
408 srand((long) my_pid);
410 #ifdef NO_SUCH_APPLET_YET
411 /* If we aren't "vi", we are "view" */
412 if (ENABLE_FEATURE_VI_READONLY && applet_name[2]) {
413 SET_READONLY_MODE(readonly_mode);
417 vi_setops = VI_AUTOINDENT | VI_SHOWMATCH | VI_IGNORECASE;
418 // 1- process $HOME/.exrc file (not inplemented yet)
419 // 2- process EXINIT variable from environment
420 // 3- process command line args
421 #if ENABLE_FEATURE_VI_COLON
423 char *p = getenv("EXINIT");
425 initial_cmds[0] = xstrndup(p, MAX_INPUT_LEN);
428 while ((c = getopt(argc, argv, "hCRH" IF_FEATURE_VI_COLON("c:"))) != -1) {
430 #if ENABLE_FEATURE_VI_CRASHME
435 #if ENABLE_FEATURE_VI_READONLY
436 case 'R': // Read-only flag
437 SET_READONLY_MODE(readonly_mode);
440 #if ENABLE_FEATURE_VI_COLON
441 case 'c': // cmd line vi command
443 initial_cmds[initial_cmds[0] != 0] = xstrndup(optarg, MAX_INPUT_LEN);
455 // The argv array can be used by the ":next" and ":rewind" commands
457 fn_start = optind; // remember first file name for :next and :rew
460 //----- This is the main file handling loop --------------
461 if (optind >= argc) {
464 for (; optind < argc; optind++) {
465 edit_file(argv[optind]);
468 //-----------------------------------------------------------
473 /* read text from file or create an empty buf */
474 /* will also update current_filename */
475 static int init_text_buffer(char *fn)
478 int size = file_size(fn); // file size. -1 means does not exist.
480 /* allocate/reallocate text buffer */
482 text_size = size + 10240;
483 screenbegin = dot = end = text = xzalloc(text_size);
485 if (fn != current_filename) {
486 free(current_filename);
487 current_filename = xstrdup(fn);
490 // file dont exist. Start empty buf with dummy line
491 char_insert(text, '\n');
494 rc = file_insert(fn, text, 1);
497 last_file_modified = -1;
498 #if ENABLE_FEATURE_VI_YANKMARK
499 /* init the marks. */
500 memset(mark, 0, sizeof(mark));
505 static void edit_file(char *fn)
507 #if ENABLE_FEATURE_VI_YANKMARK
508 #define cur_line edit_file__cur_line
512 #if ENABLE_FEATURE_VI_USE_SIGNALS
516 editing = 1; // 0 = exit, 1 = one file, 2 = multiple files
521 if (ENABLE_FEATURE_VI_WIN_RESIZE) {
522 get_terminal_width_height(0, &columns, &rows);
523 if (rows > MAX_SCR_ROWS) rows = MAX_SCR_ROWS;
524 if (columns > MAX_SCR_COLS) columns = MAX_SCR_COLS;
526 new_screen(rows, columns); // get memory for virtual screen
527 init_text_buffer(fn);
529 #if ENABLE_FEATURE_VI_YANKMARK
530 YDreg = 26; // default Yank/Delete reg
531 Ureg = 27; // hold orig line for "U" cmd
532 mark[26] = mark[27] = text; // init "previous context"
535 last_forward_char = last_input_char = '\0';
539 #if ENABLE_FEATURE_VI_USE_SIGNALS
541 signal(SIGWINCH, winch_sig);
542 signal(SIGTSTP, suspend_sig);
543 sig = sigsetjmp(restart, 1);
545 screenbegin = dot = text;
549 cmd_mode = 0; // 0=command 1=insert 2='R'eplace
552 offset = 0; // no horizontal offset
554 #if ENABLE_FEATURE_VI_DOT_CMD
556 ioq = ioq_start = NULL;
561 #if ENABLE_FEATURE_VI_COLON
566 while ((p = initial_cmds[n])) {
576 free(initial_cmds[n]);
577 initial_cmds[n] = NULL;
582 redraw(FALSE); // dont force every col re-draw
583 //------This is the main Vi cmd handling loop -----------------------
584 while (editing > 0) {
585 #if ENABLE_FEATURE_VI_CRASHME
587 if ((end - text) > 1) {
588 crash_dummy(); // generate a random command
591 string_insert(text, "\n\n##### Ran out of text to work on. #####\n\n"); // insert the string
597 last_input_char = c = get_one_char(); // get a cmd from user
598 #if ENABLE_FEATURE_VI_YANKMARK
599 // save a copy of the current line- for the 'U" command
600 if (begin_line(dot) != cur_line) {
601 cur_line = begin_line(dot);
602 text_yank(begin_line(dot), end_line(dot), Ureg);
605 #if ENABLE_FEATURE_VI_DOT_CMD
606 // These are commands that change text[].
607 // Remember the input for the "." command
608 if (!adding2q && ioq_start == NULL
609 && cmd_mode == 0 // command mode
610 && c > '\0' // exclude NUL and non-ASCII chars
611 && c < 0x7f // (Unicode and such)
612 && strchr(modifying_cmds, c)
617 do_cmd(c); // execute the user command
619 // poll to see if there is input already waiting. if we are
620 // not able to display output fast enough to keep up, skip
621 // the display update until we catch up with input.
622 if (!readbuffer[0] && mysleep(0) == 0) {
623 // no input pending - so update output
627 #if ENABLE_FEATURE_VI_CRASHME
629 crash_test(); // test editor variables
632 //-------------------------------------------------------------------
634 go_bottom_and_clear_to_eol();
639 //----- The Colon commands -------------------------------------
640 #if ENABLE_FEATURE_VI_COLON
641 static char *get_one_address(char *p, int *addr) // get colon addr, if present
645 IF_FEATURE_VI_YANKMARK(char c;)
646 IF_FEATURE_VI_SEARCH(char *pat;)
648 *addr = -1; // assume no addr
649 if (*p == '.') { // the current line
652 *addr = count_lines(text, q);
654 #if ENABLE_FEATURE_VI_YANKMARK
655 else if (*p == '\'') { // is this a mark addr
659 if (c >= 'a' && c <= 'z') {
662 q = mark[(unsigned char) c];
663 if (q != NULL) { // is mark valid
664 *addr = count_lines(text, q);
669 #if ENABLE_FEATURE_VI_SEARCH
670 else if (*p == '/') { // a search pattern
671 q = strchrnul(++p, '/');
672 pat = xstrndup(p, q - p); // save copy of pattern
676 q = char_search(dot, pat, FORWARD, FULL);
678 *addr = count_lines(text, q);
683 else if (*p == '$') { // the last line in file
685 q = begin_line(end - 1);
686 *addr = count_lines(text, q);
687 } else if (isdigit(*p)) { // specific line number
688 sscanf(p, "%d%n", addr, &st);
691 // unrecognized address - assume -1
697 static char *get_address(char *p, int *b, int *e) // get two colon addrs, if present
699 //----- get the address' i.e., 1,3 'a,'b -----
700 // get FIRST addr, if present
702 p++; // skip over leading spaces
703 if (*p == '%') { // alias for 1,$
706 *e = count_lines(text, end-1);
709 p = get_one_address(p, b);
712 if (*p == ',') { // is there a address separator
716 // get SECOND addr, if present
717 p = get_one_address(p, e);
721 p++; // skip over trailing spaces
725 #if ENABLE_FEATURE_VI_SET && ENABLE_FEATURE_VI_SETOPTS
726 static void setops(const char *args, const char *opname, int flg_no,
727 const char *short_opname, int opt)
729 const char *a = args + flg_no;
730 int l = strlen(opname) - 1; /* opname have + ' ' */
732 // maybe strncmp? we had tons of erroneous strncasecmp's...
733 if (strncasecmp(a, opname, l) == 0
734 || strncasecmp(a, short_opname, 2) == 0
744 // buf must be no longer than MAX_INPUT_LEN!
745 static void colon(char *buf)
747 char c, *orig_buf, *buf1, *q, *r;
748 char *fn, cmd[MAX_INPUT_LEN], args[MAX_INPUT_LEN];
749 int i, l, li, ch, b, e;
750 int useforce, forced = FALSE;
752 // :3154 // if (-e line 3154) goto it else stay put
753 // :4,33w! foo // write a portion of buffer to file "foo"
754 // :w // write all of buffer to current file
756 // :q! // quit- dont care about modified file
757 // :'a,'z!sort -u // filter block through sort
758 // :'f // goto mark "f"
759 // :'fl // list literal the mark "f" line
760 // :.r bar // read file "bar" into buffer before dot
761 // :/123/,/abc/d // delete lines from "123" line to "abc" line
762 // :/xyz/ // goto the "xyz" line
763 // :s/find/replace/ // substitute pattern "find" with "replace"
764 // :!<cmd> // run <cmd> then return
770 buf++; // move past the ':'
774 q = text; // assume 1,$ for the range
776 li = count_lines(text, end - 1);
777 fn = current_filename;
779 // look for optional address(es) :. :1 :1,9 :'q,'a :%
780 buf = get_address(buf, &b, &e);
782 // remember orig command line
785 // get the COMMAND into cmd[]
787 while (*buf != '\0') {
794 while (isblank(*buf))
798 buf1 = last_char_is(cmd, '!');
801 *buf1 = '\0'; // get rid of !
804 // if there is only one addr, then the addr
805 // is the line number of the single line the
806 // user wants. So, reset the end
807 // pointer to point at end of the "b" line
808 q = find_line(b); // what line is #b
813 // we were given two addrs. change the
814 // end pointer to the addr given by user.
815 r = find_line(e); // what line is #e
819 // ------------ now look for the command ------------
821 if (i == 0) { // :123CR goto line #123
823 dot = find_line(b); // what line is #b
827 #if ENABLE_FEATURE_ALLOW_EXEC
828 else if (cmd[0] == '!') { // run a cmd
830 // :!ls run the <cmd>
831 go_bottom_and_clear_to_eol();
833 retcode = system(orig_buf + 1); // run the cmd
835 printf("\nshell returned %i\n\n", retcode);
837 Hit_Return(); // let user see results
840 else if (cmd[0] == '=' && !cmd[1]) { // where is the address
841 if (b < 0) { // no addr given- use defaults
842 b = e = count_lines(text, dot);
844 status_line("%d", b);
845 } else if (strncmp(cmd, "delete", i) == 0) { // delete lines
846 if (b < 0) { // no addr given- use defaults
847 q = begin_line(dot); // assume .,. for the range
850 dot = yank_delete(q, r, 1, YANKDEL); // save, then delete lines
852 } else if (strncmp(cmd, "edit", i) == 0) { // Edit a file
853 // don't edit, if the current file has been modified
854 if (file_modified && !useforce) {
855 status_line_bold("No write since last change (:edit! overrides)");
859 // the user supplied a file name
861 } else if (current_filename && current_filename[0]) {
862 // no user supplied name- use the current filename
863 // fn = current_filename; was set by default
865 // no user file name, no current name- punt
866 status_line_bold("No current filename");
870 if (init_text_buffer(fn) < 0)
873 #if ENABLE_FEATURE_VI_YANKMARK
874 if (Ureg >= 0 && Ureg < 28 && reg[Ureg] != 0) {
875 free(reg[Ureg]); // free orig line reg- for 'U'
878 if (YDreg >= 0 && YDreg < 28 && reg[YDreg] != 0) {
879 free(reg[YDreg]); // free default yank/delete register
883 // how many lines in text[]?
884 li = count_lines(text, end - 1);
885 status_line("\"%s\"%s"
886 IF_FEATURE_VI_READONLY("%s")
887 " %dL, %dC", current_filename,
888 (file_size(fn) < 0 ? " [New file]" : ""),
889 IF_FEATURE_VI_READONLY(
890 ((readonly_mode) ? " [Readonly]" : ""),
893 } else if (strncmp(cmd, "file", i) == 0) { // what File is this
894 if (b != -1 || e != -1) {
895 status_line_bold("No address allowed on this command");
899 // user wants a new filename
900 free(current_filename);
901 current_filename = xstrdup(args);
903 // user wants file status info
904 last_status_cksum = 0; // force status update
906 } else if (strncmp(cmd, "features", i) == 0) { // what features are available
907 // print out values of all features
908 go_bottom_and_clear_to_eol();
913 } else if (strncmp(cmd, "list", i) == 0) { // literal print line
914 if (b < 0) { // no addr given- use defaults
915 q = begin_line(dot); // assume .,. for the range
918 go_bottom_and_clear_to_eol();
920 for (; q <= r; q++) {
924 c_is_no_print = (c & 0x80) && !Isprint(c);
931 } else if (c < ' ' || c == 127) {
942 #if ENABLE_FEATURE_VI_SET
946 } else if (strncmp(cmd, "quit", i) == 0 // Quit
947 || strncmp(cmd, "next", i) == 0 // edit next file
950 // force end of argv list
957 // don't exit if the file been modified
959 status_line_bold("No write since last change (:%s! overrides)",
960 (*cmd == 'q' ? "quit" : "next"));
963 // are there other file to edit
964 if (*cmd == 'q' && optind < save_argc - 1) {
965 status_line_bold("%d more file to edit", (save_argc - optind - 1));
968 if (*cmd == 'n' && optind >= save_argc - 1) {
969 status_line_bold("No more files to edit");
973 } else if (strncmp(cmd, "read", i) == 0) { // read file into text[]
976 status_line_bold("No filename given");
979 if (b < 0) { // no addr given- use defaults
980 q = begin_line(dot); // assume "dot"
982 // read after current line- unless user said ":0r foo"
985 { // dance around potentially-reallocated text[]
986 uintptr_t ofs = q - text;
987 ch = file_insert(fn, q, 0);
991 goto vc1; // nothing was inserted
992 // how many lines in text[]?
993 li = count_lines(q, q + ch - 1);
995 IF_FEATURE_VI_READONLY("%s")
997 IF_FEATURE_VI_READONLY((readonly_mode ? " [Readonly]" : ""),)
1000 // if the insert is before "dot" then we need to update
1003 /*file_modified++; - done by file_insert */
1005 } else if (strncmp(cmd, "rewind", i) == 0) { // rewind cmd line args
1006 if (file_modified && !useforce) {
1007 status_line_bold("No write since last change (:rewind! overrides)");
1009 // reset the filenames to edit
1010 optind = fn_start - 1;
1013 #if ENABLE_FEATURE_VI_SET
1014 } else if (strncmp(cmd, "set", i) == 0) { // set or clear features
1015 #if ENABLE_FEATURE_VI_SETOPTS
1018 i = 0; // offset into args
1019 // only blank is regarded as args delmiter. What about tab '\t' ?
1020 if (!args[0] || strcasecmp(args, "all") == 0) {
1021 // print out values of all options
1022 go_bottom_and_clear_to_eol();
1023 printf("----------------------------------------\r\n");
1024 #if ENABLE_FEATURE_VI_SETOPTS
1027 printf("autoindent ");
1033 printf("ignorecase ");
1036 printf("showmatch ");
1037 printf("tabstop=%d ", tabstop);
1042 #if ENABLE_FEATURE_VI_SETOPTS
1045 if (strncmp(argp, "no", 2) == 0)
1046 i = 2; // ":set noautoindent"
1047 setops(argp, "autoindent ", i, "ai", VI_AUTOINDENT);
1048 setops(argp, "flash ", i, "fl", VI_ERR_METHOD);
1049 setops(argp, "ignorecase ", i, "ic", VI_IGNORECASE);
1050 setops(argp, "showmatch ", i, "ic", VI_SHOWMATCH);
1052 if (strncmp(argp + i, "tabstop=%d ", 7) == 0) {
1053 sscanf(strchr(argp + i, '='), "tabstop=%d" + 7, &ch);
1054 if (ch > 0 && ch <= MAX_TABSTOP)
1057 while (*argp && *argp != ' ')
1058 argp++; // skip to arg delimiter (i.e. blank)
1059 while (*argp && *argp == ' ')
1060 argp++; // skip all delimiting blanks
1062 #endif /* FEATURE_VI_SETOPTS */
1063 #endif /* FEATURE_VI_SET */
1064 #if ENABLE_FEATURE_VI_SEARCH
1065 } else if (cmd[0] == 's') { // substitute a pattern with a replacement pattern
1069 // F points to the "find" pattern
1070 // R points to the "replace" pattern
1071 // replace the cmd line delimiters "/" with NULLs
1072 gflag = 0; // global replace flag
1073 c = orig_buf[1]; // what is the delimiter
1074 F = orig_buf + 2; // start of "find"
1075 R = strchr(F, c); // middle delimiter
1078 *R++ = '\0'; // terminate "find"
1079 buf1 = strchr(R, c);
1082 *buf1++ = '\0'; // terminate "replace"
1083 if (*buf1 == 'g') { // :s/foo/bar/g
1085 gflag++; // turn on gflag
1088 if (b < 0) { // maybe :s/foo/bar/
1089 q = begin_line(dot); // start with cur line
1090 b = count_lines(text, q); // cur line number
1093 e = b; // maybe :.s/foo/bar/
1094 for (i = b; i <= e; i++) { // so, :20,23 s \0 find \0 replace \0
1095 ls = q; // orig line start
1097 buf1 = char_search(q, F, FORWARD, LIMITED); // search cur line only for "find"
1100 // we found the "find" pattern - delete it
1101 text_hole_delete(buf1, buf1 + strlen(F) - 1);
1102 // inset the "replace" patern
1103 bias = string_insert(buf1, R); // insert the string
1106 /*q += bias; - recalculated anyway */
1107 // check for "global" :s/foo/bar/g
1109 if ((buf1 + strlen(R)) < end_line(ls)) {
1110 q = buf1 + strlen(R);
1111 goto vc4; // don't let q move past cur line
1117 #endif /* FEATURE_VI_SEARCH */
1118 } else if (strncmp(cmd, "version", i) == 0) { // show software version
1119 status_line(BB_VER " " BB_BT);
1120 } else if (strncmp(cmd, "write", i) == 0 // write text to file
1121 || strncmp(cmd, "wq", i) == 0
1122 || strncmp(cmd, "wn", i) == 0
1123 || (cmd[0] == 'x' && !cmd[1])
1125 // is there a file name to write to?
1129 #if ENABLE_FEATURE_VI_READONLY
1130 if (readonly_mode && !useforce) {
1131 status_line_bold("\"%s\" File is read only", fn);
1135 // how many lines in text[]?
1136 li = count_lines(q, r);
1138 // see if file exists- if not, its just a new file request
1140 // if "fn" is not write-able, chmod u+w
1141 // sprintf(syscmd, "chmod u+w %s", fn);
1145 l = file_write(fn, q, r);
1146 if (useforce && forced) {
1148 // sprintf(syscmd, "chmod u-w %s", fn);
1154 status_line_bold("\"%s\" %s", fn, strerror(errno));
1156 status_line("\"%s\" %dL, %dC", fn, li, l);
1157 if (q == text && r == end - 1 && l == ch) {
1159 last_file_modified = -1;
1161 if ((cmd[0] == 'x' || cmd[1] == 'q' || cmd[1] == 'n' ||
1162 cmd[0] == 'X' || cmd[1] == 'Q' || cmd[1] == 'N')
1167 #if ENABLE_FEATURE_VI_READONLY
1170 #if ENABLE_FEATURE_VI_YANKMARK
1171 } else if (strncmp(cmd, "yank", i) == 0) { // yank lines
1172 if (b < 0) { // no addr given- use defaults
1173 q = begin_line(dot); // assume .,. for the range
1176 text_yank(q, r, YDreg);
1177 li = count_lines(q, r);
1178 status_line("Yank %d lines (%d chars) into [%c]",
1179 li, strlen(reg[YDreg]), what_reg());
1183 not_implemented(cmd);
1186 dot = bound_dot(dot); // make sure "dot" is valid
1188 #if ENABLE_FEATURE_VI_SEARCH
1190 status_line(":s expression missing delimiters");
1194 #endif /* FEATURE_VI_COLON */
1196 static void Hit_Return(void)
1201 write1("[Hit return to continue]");
1203 while ((c = get_one_char()) != '\n' && c != '\r')
1205 redraw(TRUE); // force redraw all
1208 static int next_tabstop(int col)
1210 return col + ((tabstop - 1) - (col % tabstop));
1213 //----- Synchronize the cursor to Dot --------------------------
1214 static NOINLINE void sync_cursor(char *d, int *row, int *col)
1216 char *beg_cur; // begin and end of "d" line
1220 beg_cur = begin_line(d); // first char of cur line
1222 if (beg_cur < screenbegin) {
1223 // "d" is before top line on screen
1224 // how many lines do we have to move
1225 cnt = count_lines(beg_cur, screenbegin);
1227 screenbegin = beg_cur;
1228 if (cnt > (rows - 1) / 2) {
1229 // we moved too many lines. put "dot" in middle of screen
1230 for (cnt = 0; cnt < (rows - 1) / 2; cnt++) {
1231 screenbegin = prev_line(screenbegin);
1235 char *end_scr; // begin and end of screen
1236 end_scr = end_screen(); // last char of screen
1237 if (beg_cur > end_scr) {
1238 // "d" is after bottom line on screen
1239 // how many lines do we have to move
1240 cnt = count_lines(end_scr, beg_cur);
1241 if (cnt > (rows - 1) / 2)
1242 goto sc1; // too many lines
1243 for (ro = 0; ro < cnt - 1; ro++) {
1244 // move screen begin the same amount
1245 screenbegin = next_line(screenbegin);
1246 // now, move the end of screen
1247 end_scr = next_line(end_scr);
1248 end_scr = end_line(end_scr);
1252 // "d" is on screen- find out which row
1254 for (ro = 0; ro < rows - 1; ro++) { // drive "ro" to correct row
1260 // find out what col "d" is on
1262 while (tp < d) { // drive "co" to correct column
1263 if (*tp == '\n') //vda || *tp == '\0')
1266 // handle tabs like real vi
1267 if (d == tp && cmd_mode) {
1270 co = next_tabstop(co);
1271 } else if ((unsigned char)*tp < ' ' || *tp == 0x7f) {
1272 co++; // display as ^X, use 2 columns
1278 // "co" is the column where "dot" is.
1279 // The screen has "columns" columns.
1280 // The currently displayed columns are 0+offset -- columns+ofset
1281 // |-------------------------------------------------------------|
1283 // offset | |------- columns ----------------|
1285 // If "co" is already in this range then we do not have to adjust offset
1286 // but, we do have to subtract the "offset" bias from "co".
1287 // If "co" is outside this range then we have to change "offset".
1288 // If the first char of a line is a tab the cursor will try to stay
1289 // in column 7, but we have to set offset to 0.
1291 if (co < 0 + offset) {
1294 if (co >= columns + offset) {
1295 offset = co - columns + 1;
1297 // if the first char of the line is a tab, and "dot" is sitting on it
1298 // force offset to 0.
1299 if (d == beg_cur && *d == '\t') {
1308 //----- Text Movement Routines ---------------------------------
1309 static char *begin_line(char *p) // return pointer to first char cur line
1312 p = memrchr(text, '\n', p - text);
1320 static char *end_line(char *p) // return pointer to NL of cur line
1323 p = memchr(p, '\n', end - p - 1);
1330 static char *dollar_line(char *p) // return pointer to just before NL line
1333 // Try to stay off of the Newline
1334 if (*p == '\n' && (p - begin_line(p)) > 0)
1339 static char *prev_line(char *p) // return pointer first char prev line
1341 p = begin_line(p); // goto begining of cur line
1342 if (p > text && p[-1] == '\n')
1343 p--; // step to prev line
1344 p = begin_line(p); // goto begining of prev line
1348 static char *next_line(char *p) // return pointer first char next line
1351 if (p < end - 1 && *p == '\n')
1352 p++; // step to next line
1356 //----- Text Information Routines ------------------------------
1357 static char *end_screen(void)
1362 // find new bottom line
1364 for (cnt = 0; cnt < rows - 2; cnt++)
1370 // count line from start to stop
1371 static int count_lines(char *start, char *stop)
1376 if (stop < start) { // start and stop are backwards- reverse them
1382 stop = end_line(stop);
1383 while (start <= stop && start <= end - 1) {
1384 start = end_line(start);
1392 static char *find_line(int li) // find begining of line #li
1396 for (q = text; li > 1; li--) {
1402 //----- Dot Movement Routines ----------------------------------
1403 static void dot_left(void)
1405 if (dot > text && dot[-1] != '\n')
1409 static void dot_right(void)
1411 if (dot < end - 1 && *dot != '\n')
1415 static void dot_begin(void)
1417 dot = begin_line(dot); // return pointer to first char cur line
1420 static void dot_end(void)
1422 dot = end_line(dot); // return pointer to last char cur line
1425 static char *move_to_col(char *p, int l)
1431 while (co < l && p < end) {
1432 if (*p == '\n') //vda || *p == '\0')
1435 co = next_tabstop(co);
1436 } else if (*p < ' ' || *p == 127) {
1437 co++; // display as ^X, use 2 columns
1445 static void dot_next(void)
1447 dot = next_line(dot);
1450 static void dot_prev(void)
1452 dot = prev_line(dot);
1455 static void dot_scroll(int cnt, int dir)
1459 for (; cnt > 0; cnt--) {
1462 // ctrl-Y scroll up one line
1463 screenbegin = prev_line(screenbegin);
1466 // ctrl-E scroll down one line
1467 screenbegin = next_line(screenbegin);
1470 // make sure "dot" stays on the screen so we dont scroll off
1471 if (dot < screenbegin)
1473 q = end_screen(); // find new bottom line
1475 dot = begin_line(q); // is dot is below bottom line?
1479 static void dot_skip_over_ws(void)
1482 while (isspace(*dot) && *dot != '\n' && dot < end - 1)
1486 static void dot_delete(void) // delete the char at 'dot'
1488 text_hole_delete(dot, dot);
1491 static char *bound_dot(char *p) // make sure text[0] <= P < "end"
1493 if (p >= end && end > text) {
1495 indicate_error('1');
1499 indicate_error('2');
1504 //----- Helper Utility Routines --------------------------------
1506 //----------------------------------------------------------------
1507 //----- Char Routines --------------------------------------------
1508 /* Chars that are part of a word-
1509 * 0123456789_ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz
1510 * Chars that are Not part of a word (stoppers)
1511 * !"#$%&'()*+,-./:;<=>?@[\]^`{|}~
1512 * Chars that are WhiteSpace
1513 * TAB NEWLINE VT FF RETURN SPACE
1514 * DO NOT COUNT NEWLINE AS WHITESPACE
1517 static char *new_screen(int ro, int co)
1522 screensize = ro * co + 8;
1523 screen = xmalloc(screensize);
1524 // initialize the new screen. assume this will be a empty file.
1526 // non-existent text[] lines start with a tilde (~).
1527 for (li = 1; li < ro - 1; li++) {
1528 screen[(li * co) + 0] = '~';
1533 #if ENABLE_FEATURE_VI_SEARCH
1534 static int mycmp(const char *s1, const char *s2, int len)
1536 if (ENABLE_FEATURE_VI_SETOPTS && ignorecase) {
1537 return strncasecmp(s1, s2, len);
1539 return strncmp(s1, s2, len);
1542 // search for pattern starting at p
1543 static char *char_search(char *p, const char *pat, int dir, int range)
1545 #ifndef REGEX_SEARCH
1550 if (dir == FORWARD) {
1551 stop = end - 1; // assume range is p - end-1
1552 if (range == LIMITED)
1553 stop = next_line(p); // range is to next line
1554 for (start = p; start < stop; start++) {
1555 if (mycmp(start, pat, len) == 0) {
1559 } else if (dir == BACK) {
1560 stop = text; // assume range is text - p
1561 if (range == LIMITED)
1562 stop = prev_line(p); // range is to prev line
1563 for (start = p - len; start >= stop; start--) {
1564 if (mycmp(start, pat, len) == 0) {
1569 // pattern not found
1571 #else /* REGEX_SEARCH */
1573 struct re_pattern_buffer preg;
1577 re_syntax_options = RE_SYNTAX_POSIX_EXTENDED;
1583 // assume a LIMITED forward search
1591 // count the number of chars to search over, forward or backward
1595 // RANGE could be negative if we are searching backwards
1598 q = re_compile_pattern(pat, strlen(pat), &preg);
1600 // The pattern was not compiled
1601 status_line_bold("bad search pattern: \"%s\": %s", pat, q);
1602 i = 0; // return p if pattern not compiled
1612 // search for the compiled pattern, preg, in p[]
1613 // range < 0- search backward
1614 // range > 0- search forward
1616 // re_search() < 0 not found or error
1617 // re_search() > 0 index of found pattern
1618 // struct pattern char int int int struct reg
1619 // re_search (*pattern_buffer, *string, size, start, range, *regs)
1620 i = re_search(&preg, q, size, 0, range, 0);
1623 i = 0; // return NULL if pattern not found
1626 if (dir == FORWARD) {
1632 #endif /* REGEX_SEARCH */
1634 #endif /* FEATURE_VI_SEARCH */
1636 static char *char_insert(char *p, char c) // insert the char c at 'p'
1638 if (c == 22) { // Is this an ctrl-V?
1639 p += stupid_insert(p, '^'); // use ^ to indicate literal next
1640 refresh(FALSE); // show the ^
1645 } else if (c == 27) { // Is this an ESC?
1648 end_cmd_q(); // stop adding to q
1649 last_status_cksum = 0; // force status update
1650 if ((p[-1] != '\n') && (dot > text)) {
1653 } else if (c == erase_char || c == 8 || c == 127) { // Is this a BS
1655 if ((p[-1] != '\n') && (dot>text)) {
1657 p = text_hole_delete(p, p); // shrink buffer 1 char
1660 // insert a char into text[]
1661 char *sp; // "save p"
1664 c = '\n'; // translate \r to \n
1665 sp = p; // remember addr of insert
1666 p += 1 + stupid_insert(p, c); // insert the char
1667 #if ENABLE_FEATURE_VI_SETOPTS
1668 if (showmatch && strchr(")]}", *sp) != NULL) {
1671 if (autoindent && c == '\n') { // auto indent the new line
1674 q = prev_line(p); // use prev line as template
1675 len = strspn(q, " \t"); // space or tab
1678 bias = text_hole_make(p, len);
1690 // might reallocate text[]! use p += stupid_insert(p, ...),
1691 // and be careful to not use pointers into potentially freed text[]!
1692 static uintptr_t stupid_insert(char *p, char c) // stupidly insert the char c at 'p'
1695 bias = text_hole_make(p, 1);
1698 //file_modified++; - done by text_hole_make()
1702 static int find_range(char **start, char **stop, char c)
1704 char *save_dot, *p, *q, *t;
1705 int cnt, multiline = 0;
1710 if (strchr("cdy><", c)) {
1711 // these cmds operate on whole lines
1712 p = q = begin_line(p);
1713 for (cnt = 1; cnt < cmdcnt; cnt++) {
1717 } else if (strchr("^%$0bBeEfth\b\177", c)) {
1718 // These cmds operate on char positions
1719 do_cmd(c); // execute movement cmd
1721 } else if (strchr("wW", c)) {
1722 do_cmd(c); // execute movement cmd
1723 // if we are at the next word's first char
1724 // step back one char
1725 // but check the possibilities when it is true
1726 if (dot > text && ((isspace(dot[-1]) && !isspace(dot[0]))
1727 || (ispunct(dot[-1]) && !ispunct(dot[0]))
1728 || (isalnum(dot[-1]) && !isalnum(dot[0]))))
1729 dot--; // move back off of next word
1730 if (dot > text && *dot == '\n')
1731 dot--; // stay off NL
1733 } else if (strchr("H-k{", c)) {
1734 // these operate on multi-lines backwards
1735 q = end_line(dot); // find NL
1736 do_cmd(c); // execute movement cmd
1739 } else if (strchr("L+j}\r\n", c)) {
1740 // these operate on multi-lines forwards
1741 p = begin_line(dot);
1742 do_cmd(c); // execute movement cmd
1743 dot_end(); // find NL
1746 // nothing -- this causes any other values of c to
1747 // represent the one-character range under the
1748 // cursor. this is correct for ' ' and 'l', but
1749 // perhaps no others.
1758 // backward char movements don't include start position
1759 if (q > p && strchr("^0bBh\b\177", c)) q--;
1762 for (t = p; t <= q; t++) {
1775 static int st_test(char *p, int type, int dir, char *tested)
1785 if (type == S_BEFORE_WS) {
1787 test = (!isspace(c) || c == '\n');
1789 if (type == S_TO_WS) {
1791 test = (!isspace(c) || c == '\n');
1793 if (type == S_OVER_WS) {
1797 if (type == S_END_PUNCT) {
1801 if (type == S_END_ALNUM) {
1803 test = (isalnum(c) || c == '_');
1809 static char *skip_thing(char *p, int linecnt, int dir, int type)
1813 while (st_test(p, type, dir, &c)) {
1814 // make sure we limit search to correct number of lines
1815 if (c == '\n' && --linecnt < 1)
1817 if (dir >= 0 && p >= end - 1)
1819 if (dir < 0 && p <= text)
1821 p += dir; // move to next char
1826 // find matching char of pair () [] {}
1827 static char *find_pair(char *p, const char c)
1834 dir = 1; // assume forward
1836 case '(': match = ')'; break;
1837 case '[': match = ']'; break;
1838 case '{': match = '}'; break;
1839 case ')': match = '('; dir = -1; break;
1840 case ']': match = '['; dir = -1; break;
1841 case '}': match = '{'; dir = -1; break;
1843 for (q = p + dir; text <= q && q < end; q += dir) {
1844 // look for match, count levels of pairs (( ))
1846 level++; // increase pair levels
1848 level--; // reduce pair level
1850 break; // found matching pair
1853 q = NULL; // indicate no match
1857 #if ENABLE_FEATURE_VI_SETOPTS
1858 // show the matching char of a pair, () [] {}
1859 static void showmatching(char *p)
1863 // we found half of a pair
1864 q = find_pair(p, *p); // get loc of matching char
1866 indicate_error('3'); // no matching char
1868 // "q" now points to matching pair
1869 save_dot = dot; // remember where we are
1870 dot = q; // go to new loc
1871 refresh(FALSE); // let the user see it
1872 mysleep(40); // give user some time
1873 dot = save_dot; // go back to old loc
1877 #endif /* FEATURE_VI_SETOPTS */
1879 // open a hole in text[]
1880 // might reallocate text[]! use p += text_hole_make(p, ...),
1881 // and be careful to not use pointers into potentially freed text[]!
1882 static uintptr_t text_hole_make(char *p, int size) // at "p", make a 'size' byte hole
1888 end += size; // adjust the new END
1889 if (end >= (text + text_size)) {
1891 text_size += end - (text + text_size) + 10240;
1892 new_text = xrealloc(text, text_size);
1893 bias = (new_text - text);
1894 screenbegin += bias;
1900 memmove(p + size, p, end - size - p);
1901 memset(p, ' ', size); // clear new hole
1906 // close a hole in text[]
1907 static char *text_hole_delete(char *p, char *q) // delete "p" through "q", inclusive
1912 // move forwards, from beginning
1916 if (q < p) { // they are backward- swap them
1920 hole_size = q - p + 1;
1922 if (src < text || src > end)
1924 if (dest < text || dest >= end)
1927 goto thd_atend; // just delete the end of the buffer
1928 memmove(dest, src, cnt);
1930 end = end - hole_size; // adjust the new END
1932 dest = end - 1; // make sure dest in below end-1
1934 dest = end = text; // keep pointers valid
1940 // copy text into register, then delete text.
1941 // if dist <= 0, do not include, or go past, a NewLine
1943 static char *yank_delete(char *start, char *stop, int dist, int yf)
1947 // make sure start <= stop
1949 // they are backwards, reverse them
1955 // we cannot cross NL boundaries
1959 // dont go past a NewLine
1960 for (; p + 1 <= stop; p++) {
1962 stop = p; // "stop" just before NewLine
1968 #if ENABLE_FEATURE_VI_YANKMARK
1969 text_yank(start, stop, YDreg);
1971 if (yf == YANKDEL) {
1972 p = text_hole_delete(start, stop);
1977 static void show_help(void)
1979 puts("These features are available:"
1980 #if ENABLE_FEATURE_VI_SEARCH
1981 "\n\tPattern searches with / and ?"
1983 #if ENABLE_FEATURE_VI_DOT_CMD
1984 "\n\tLast command repeat with \'.\'"
1986 #if ENABLE_FEATURE_VI_YANKMARK
1987 "\n\tLine marking with 'x"
1988 "\n\tNamed buffers with \"x"
1990 #if ENABLE_FEATURE_VI_READONLY
1991 "\n\tReadonly if vi is called as \"view\""
1992 "\n\tReadonly with -R command line arg"
1994 #if ENABLE_FEATURE_VI_SET
1995 "\n\tSome colon mode commands with \':\'"
1997 #if ENABLE_FEATURE_VI_SETOPTS
1998 "\n\tSettable options with \":set\""
2000 #if ENABLE_FEATURE_VI_USE_SIGNALS
2001 "\n\tSignal catching- ^C"
2002 "\n\tJob suspend and resume with ^Z"
2004 #if ENABLE_FEATURE_VI_WIN_RESIZE
2005 "\n\tAdapt to window re-sizes"
2010 #if ENABLE_FEATURE_VI_DOT_CMD
2011 static void start_new_cmd_q(char c)
2013 // get buffer for new cmd
2014 // if there is a current cmd count put it in the buffer first
2016 lmc_len = sprintf(last_modifying_cmd, "%d%c", cmdcnt, c);
2017 } else { // just save char c onto queue
2018 last_modifying_cmd[0] = c;
2024 static void end_cmd_q(void)
2026 #if ENABLE_FEATURE_VI_YANKMARK
2027 YDreg = 26; // go back to default Yank/Delete reg
2031 #endif /* FEATURE_VI_DOT_CMD */
2033 #if ENABLE_FEATURE_VI_YANKMARK \
2034 || (ENABLE_FEATURE_VI_COLON && ENABLE_FEATURE_VI_SEARCH) \
2035 || ENABLE_FEATURE_VI_CRASHME
2036 // might reallocate text[]! use p += string_insert(p, ...),
2037 // and be careful to not use pointers into potentially freed text[]!
2038 static uintptr_t string_insert(char *p, const char *s) // insert the string at 'p'
2044 bias = text_hole_make(p, i);
2047 #if ENABLE_FEATURE_VI_YANKMARK
2050 for (cnt = 0; *s != '\0'; s++) {
2054 status_line("Put %d lines (%d chars) from [%c]", cnt, i, what_reg());
2061 #if ENABLE_FEATURE_VI_YANKMARK
2062 static char *text_yank(char *p, char *q, int dest) // copy text into a register
2065 if (cnt < 0) { // they are backwards- reverse them
2069 free(reg[dest]); // if already a yank register, free it
2070 reg[dest] = xstrndup(p, cnt + 1);
2074 static char what_reg(void)
2078 c = 'D'; // default to D-reg
2079 if (0 <= YDreg && YDreg <= 25)
2080 c = 'a' + (char) YDreg;
2088 static void check_context(char cmd)
2090 // A context is defined to be "modifying text"
2091 // Any modifying command establishes a new context.
2093 if (dot < context_start || dot > context_end) {
2094 if (strchr(modifying_cmds, cmd) != NULL) {
2095 // we are trying to modify text[]- make this the current context
2096 mark[27] = mark[26]; // move cur to prev
2097 mark[26] = dot; // move local to cur
2098 context_start = prev_line(prev_line(dot));
2099 context_end = next_line(next_line(dot));
2100 //loiter= start_loiter= now;
2105 static char *swap_context(char *p) // goto new context for '' command make this the current context
2109 // the current context is in mark[26]
2110 // the previous context is in mark[27]
2111 // only swap context if other context is valid
2112 if (text <= mark[27] && mark[27] <= end - 1) {
2114 mark[27] = mark[26];
2116 p = mark[26]; // where we are going- previous context
2117 context_start = prev_line(prev_line(prev_line(p)));
2118 context_end = next_line(next_line(next_line(p)));
2122 #endif /* FEATURE_VI_YANKMARK */
2124 //----- Set terminal attributes --------------------------------
2125 static void rawmode(void)
2127 tcgetattr(0, &term_orig);
2128 term_vi = term_orig;
2129 term_vi.c_lflag &= (~ICANON & ~ECHO); // leave ISIG ON- allow intr's
2130 term_vi.c_iflag &= (~IXON & ~ICRNL);
2131 term_vi.c_oflag &= (~ONLCR);
2132 term_vi.c_cc[VMIN] = 1;
2133 term_vi.c_cc[VTIME] = 0;
2134 erase_char = term_vi.c_cc[VERASE];
2135 tcsetattr_stdin_TCSANOW(&term_vi);
2138 static void cookmode(void)
2141 tcsetattr_stdin_TCSANOW(&term_orig);
2144 //----- Come here when we get a window resize signal ---------
2145 #if ENABLE_FEATURE_VI_USE_SIGNALS
2146 static void winch_sig(int sig UNUSED_PARAM)
2148 // FIXME: do it in main loop!!!
2149 signal(SIGWINCH, winch_sig);
2150 if (ENABLE_FEATURE_VI_WIN_RESIZE) {
2151 get_terminal_width_height(0, &columns, &rows);
2152 if (rows > MAX_SCR_ROWS) rows = MAX_SCR_ROWS;
2153 if (columns > MAX_SCR_COLS) columns = MAX_SCR_COLS;
2155 new_screen(rows, columns); // get memory for virtual screen
2156 redraw(TRUE); // re-draw the screen
2159 //----- Come here when we get a continue signal -------------------
2160 static void cont_sig(int sig UNUSED_PARAM)
2162 rawmode(); // terminal to "raw"
2163 last_status_cksum = 0; // force status update
2164 redraw(TRUE); // re-draw the screen
2166 signal(SIGTSTP, suspend_sig);
2167 signal(SIGCONT, SIG_DFL);
2168 kill(my_pid, SIGCONT); // huh? why? we are already "continued"...
2171 //----- Come here when we get a Suspend signal -------------------
2172 static void suspend_sig(int sig UNUSED_PARAM)
2174 go_bottom_and_clear_to_eol();
2175 cookmode(); // terminal to "cooked"
2177 signal(SIGCONT, cont_sig);
2178 signal(SIGTSTP, SIG_DFL);
2179 kill(my_pid, SIGTSTP);
2182 //----- Come here when we get a signal ---------------------------
2183 static void catch_sig(int sig)
2185 signal(SIGINT, catch_sig);
2187 siglongjmp(restart, sig);
2189 #endif /* FEATURE_VI_USE_SIGNALS */
2191 static int mysleep(int hund) // sleep for 'hund' 1/100 seconds or stdin ready
2193 struct pollfd pfd[1];
2195 pfd[0].fd = STDIN_FILENO;
2196 pfd[0].events = POLLIN;
2197 return safe_poll(pfd, 1, hund*10) > 0;
2200 //----- IO Routines --------------------------------------------
2201 static int readit(void) // read (maybe cursor) key from stdin
2206 c = read_key(STDIN_FILENO, readbuffer);
2207 if (c == -1) { // EOF/error
2208 go_bottom_and_clear_to_eol();
2209 cookmode(); // terminal to "cooked"
2210 bb_error_msg_and_die("can't read user input");
2215 //----- IO Routines --------------------------------------------
2216 static int get_one_char(void)
2220 #if ENABLE_FEATURE_VI_DOT_CMD
2222 // we are not adding to the q.
2223 // but, we may be reading from a q
2225 // there is no current q, read from STDIN
2226 c = readit(); // get the users input
2228 // there is a queue to get chars from first
2229 // careful with correct sign expansion!
2230 c = (unsigned char)*ioq++;
2232 // the end of the q, read from STDIN
2234 ioq_start = ioq = 0;
2235 c = readit(); // get the users input
2239 // adding STDIN chars to q
2240 c = readit(); // get the users input
2241 if (lmc_len >= MAX_INPUT_LEN - 1) {
2242 status_line_bold("last_modifying_cmd overrun");
2244 // add new char to q
2245 last_modifying_cmd[lmc_len++] = c;
2249 c = readit(); // get the users input
2250 #endif /* FEATURE_VI_DOT_CMD */
2254 // Get input line (uses "status line" area)
2255 static char *get_input_line(const char *prompt)
2257 // char [MAX_INPUT_LEN]
2258 #define buf get_input_line__buf
2263 strcpy(buf, prompt);
2264 last_status_cksum = 0; // force status update
2265 go_bottom_and_clear_to_eol();
2266 write1(prompt); // write out the :, /, or ? prompt
2269 while (i < MAX_INPUT_LEN) {
2271 if (c == '\n' || c == '\r' || c == 27)
2272 break; // this is end of input
2273 if (c == erase_char || c == 8 || c == 127) {
2274 // user wants to erase prev char
2276 write1("\b \b"); // erase char on screen
2277 if (i <= 0) // user backs up before b-o-l, exit
2279 } else if (c > 0 && c < 256) { // exclude Unicode
2280 // (TODO: need to handle Unicode)
2291 static int file_size(const char *fn) // what is the byte size of "fn"
2297 if (fn && fn[0] && stat(fn, &st_buf) == 0) // see if file exists
2298 cnt = (int) st_buf.st_size;
2302 // might reallocate text[]!
2303 static int file_insert(const char *fn, char *p, int update_ro_status)
2307 struct stat statbuf;
2310 if (stat(fn, &statbuf) < 0) {
2311 status_line_bold("\"%s\" %s", fn, strerror(errno));
2314 if (!S_ISREG(statbuf.st_mode)) {
2315 // This is not a regular file
2316 status_line_bold("\"%s\" Not a regular file", fn);
2319 if (p < text || p > end) {
2320 status_line_bold("Trying to insert file outside of memory");
2324 // read file to buffer
2325 fd = open(fn, O_RDONLY);
2327 status_line_bold("\"%s\" %s", fn, strerror(errno));
2330 size = statbuf.st_size;
2331 p += text_hole_make(p, size);
2332 cnt = safe_read(fd, p, size);
2334 status_line_bold("\"%s\" %s", fn, strerror(errno));
2335 p = text_hole_delete(p, p + size - 1); // un-do buffer insert
2336 } else if (cnt < size) {
2337 // There was a partial read, shrink unused space text[]
2338 p = text_hole_delete(p + cnt, p + (size - cnt) - 1); // un-do buffer insert
2339 status_line_bold("can't read all of file \"%s\"", fn);
2345 #if ENABLE_FEATURE_VI_READONLY
2346 if (update_ro_status
2347 && ((access(fn, W_OK) < 0) ||
2348 /* root will always have access()
2349 * so we check fileperms too */
2350 !(statbuf.st_mode & (S_IWUSR | S_IWGRP | S_IWOTH))
2353 SET_READONLY_FILE(readonly_mode);
2359 static int file_write(char *fn, char *first, char *last)
2361 int fd, cnt, charcnt;
2364 status_line_bold("No current filename");
2368 /* By popular request we do not open file with O_TRUNC,
2369 * but instead ftruncate() it _after_ successful write.
2370 * Might reduce amount of data lost on power fail etc.
2372 fd = open(fn, (O_WRONLY | O_CREAT), 0666);
2375 cnt = last - first + 1;
2376 charcnt = full_write(fd, first, cnt);
2377 ftruncate(fd, charcnt);
2378 if (charcnt == cnt) {
2380 //file_modified = FALSE;
2388 //----- Terminal Drawing ---------------------------------------
2389 // The terminal is made up of 'rows' line of 'columns' columns.
2390 // classically this would be 24 x 80.
2391 // screen coordinates
2397 // 23,0 ... 23,79 <- status line
2399 //----- Move the cursor to row x col (count from 0, not 1) -------
2400 static void place_cursor(int row, int col, int optimize)
2402 char cm1[sizeof(CMrc) + sizeof(int)*3 * 2];
2403 #if ENABLE_FEATURE_VI_OPTIMIZE_CURSOR
2405 SZ_UP = sizeof(CMup),
2406 SZ_DN = sizeof(CMdown),
2407 SEQ_SIZE = SZ_UP > SZ_DN ? SZ_UP : SZ_DN,
2409 char cm2[SEQ_SIZE * 5 + 32]; // bigger than worst case size
2413 if (row < 0) row = 0;
2414 if (row >= rows) row = rows - 1;
2415 if (col < 0) col = 0;
2416 if (col >= columns) col = columns - 1;
2418 //----- 1. Try the standard terminal ESC sequence
2419 sprintf(cm1, CMrc, row + 1, col + 1);
2422 #if ENABLE_FEATURE_VI_OPTIMIZE_CURSOR
2423 if (optimize && col < 16) {
2425 int Rrow = last_row;
2426 int diff = Rrow - row;
2428 if (diff < -5 || diff > 5)
2431 //----- find the minimum # of chars to move cursor -------------
2432 //----- 2. Try moving with discreet chars (Newline, [back]space, ...)
2435 // move to the correct row
2436 while (row < Rrow) {
2437 // the cursor has to move up
2441 while (row > Rrow) {
2442 // the cursor has to move down
2443 strcat(cm2, CMdown);
2447 // now move to the correct column
2448 strcat(cm2, "\r"); // start at col 0
2449 // just send out orignal source char to get to correct place
2450 screenp = &screen[row * columns]; // start of screen line
2451 strncat(cm2, screenp, col);
2453 // pick the shortest cursor motion to send out
2454 if (strlen(cm2) < strlen(cm)) {
2460 #endif /* FEATURE_VI_OPTIMIZE_CURSOR */
2464 //----- Erase from cursor to end of line -----------------------
2465 static void clear_to_eol(void)
2467 write1(Ceol); // Erase from cursor to end of line
2470 static void go_bottom_and_clear_to_eol(void)
2472 place_cursor(rows - 1, 0, FALSE); // go to bottom of screen
2473 clear_to_eol(); // erase to end of line
2476 //----- Erase from cursor to end of screen -----------------------
2477 static void clear_to_eos(void)
2479 write1(Ceos); // Erase from cursor to end of screen
2482 //----- Start standout mode ------------------------------------
2483 static void standout_start(void) // send "start reverse video" sequence
2485 write1(SOs); // Start reverse video mode
2488 //----- End standout mode --------------------------------------
2489 static void standout_end(void) // send "end reverse video" sequence
2491 write1(SOn); // End reverse video mode
2494 //----- Flash the screen --------------------------------------
2495 static void flash(int h)
2497 standout_start(); // send "start reverse video" sequence
2500 standout_end(); // send "end reverse video" sequence
2504 static void Indicate_Error(void)
2506 #if ENABLE_FEATURE_VI_CRASHME
2508 return; // generate a random command
2511 write1(bell); // send out a bell character
2517 //----- Screen[] Routines --------------------------------------
2518 //----- Erase the Screen[] memory ------------------------------
2519 static void screen_erase(void)
2521 memset(screen, ' ', screensize); // clear new screen
2524 static int bufsum(char *buf, int count)
2527 char *e = buf + count;
2530 sum += (unsigned char) *buf++;
2534 //----- Draw the status line at bottom of the screen -------------
2535 static void show_status_line(void)
2537 int cnt = 0, cksum = 0;
2539 // either we already have an error or status message, or we
2541 if (!have_status_msg) {
2542 cnt = format_edit_status();
2543 cksum = bufsum(status_buffer, cnt);
2545 if (have_status_msg || ((cnt > 0 && last_status_cksum != cksum))) {
2546 last_status_cksum = cksum; // remember if we have seen this line
2547 go_bottom_and_clear_to_eol();
2548 write1(status_buffer);
2549 if (have_status_msg) {
2550 if (((int)strlen(status_buffer) - (have_status_msg - 1)) >
2552 have_status_msg = 0;
2555 have_status_msg = 0;
2557 place_cursor(crow, ccol, FALSE); // put cursor back in correct place
2562 //----- format the status buffer, the bottom line of screen ------
2563 // format status buffer, with STANDOUT mode
2564 static void status_line_bold(const char *format, ...)
2568 va_start(args, format);
2569 strcpy(status_buffer, SOs); // Terminal standout mode on
2570 vsprintf(status_buffer + sizeof(SOs)-1, format, args);
2571 strcat(status_buffer, SOn); // Terminal standout mode off
2574 have_status_msg = 1 + sizeof(SOs) + sizeof(SOn) - 2;
2577 // format status buffer
2578 static void status_line(const char *format, ...)
2582 va_start(args, format);
2583 vsprintf(status_buffer, format, args);
2586 have_status_msg = 1;
2589 // copy s to buf, convert unprintable
2590 static void print_literal(char *buf, const char *s)
2604 c_is_no_print = (c & 0x80) && !Isprint(c);
2605 if (c_is_no_print) {
2610 if (c < ' ' || c == 0x7f) {
2612 c |= '@'; /* 0x40 */
2618 if (c_is_no_print) {
2626 if (d - buf > MAX_INPUT_LEN - 10) // paranoia
2631 static void not_implemented(const char *s)
2633 char buf[MAX_INPUT_LEN];
2635 print_literal(buf, s);
2636 status_line_bold("\'%s\' is not implemented", buf);
2639 // show file status on status line
2640 static int format_edit_status(void)
2642 static const char cmd_mode_indicator[] ALIGN1 = "-IR-";
2644 #define tot format_edit_status__tot
2646 int cur, percent, ret, trunc_at;
2648 // file_modified is now a counter rather than a flag. this
2649 // helps reduce the amount of line counting we need to do.
2650 // (this will cause a mis-reporting of modified status
2651 // once every MAXINT editing operations.)
2653 // it would be nice to do a similar optimization here -- if
2654 // we haven't done a motion that could have changed which line
2655 // we're on, then we shouldn't have to do this count_lines()
2656 cur = count_lines(text, dot);
2658 // reduce counting -- the total lines can't have
2659 // changed if we haven't done any edits.
2660 if (file_modified != last_file_modified) {
2661 tot = cur + count_lines(dot, end - 1) - 1;
2662 last_file_modified = file_modified;
2665 // current line percent
2666 // ------------- ~~ ----------
2669 percent = (100 * cur) / tot;
2675 trunc_at = columns < STATUS_BUFFER_LEN-1 ?
2676 columns : STATUS_BUFFER_LEN-1;
2678 ret = snprintf(status_buffer, trunc_at+1,
2679 #if ENABLE_FEATURE_VI_READONLY
2680 "%c %s%s%s %d/%d %d%%",
2682 "%c %s%s %d/%d %d%%",
2684 cmd_mode_indicator[cmd_mode & 3],
2685 (current_filename != NULL ? current_filename : "No file"),
2686 #if ENABLE_FEATURE_VI_READONLY
2687 (readonly_mode ? " [Readonly]" : ""),
2689 (file_modified ? " [Modified]" : ""),
2692 if (ret >= 0 && ret < trunc_at)
2693 return ret; /* it all fit */
2695 return trunc_at; /* had to truncate */
2699 //----- Force refresh of all Lines -----------------------------
2700 static void redraw(int full_screen)
2702 place_cursor(0, 0, FALSE); // put cursor in correct place
2703 clear_to_eos(); // tell terminal to erase display
2704 screen_erase(); // erase the internal screen buffer
2705 last_status_cksum = 0; // force status update
2706 refresh(full_screen); // this will redraw the entire display
2710 //----- Format a text[] line into a buffer ---------------------
2711 static char* format_line(char *src /*, int li*/)
2716 char *dest = scr_out_buf; // [MAX_SCR_COLS + MAX_TABSTOP * 2]
2718 c = '~'; // char in col 0 in non-existent lines is '~'
2720 while (co < columns + tabstop) {
2721 // have we gone past the end?
2726 if ((c & 0x80) && !Isprint(c)) {
2729 if (c < ' ' || c == 0x7f) {
2733 while ((co % tabstop) != (tabstop - 1)) {
2741 c += '@'; // Ctrl-X -> 'X'
2746 // discard scrolled-off-to-the-left portion,
2747 // in tabstop-sized pieces
2748 if (ofs >= tabstop && co >= tabstop) {
2749 memmove(dest, dest + tabstop, co);
2756 // check "short line, gigantic offset" case
2759 // discard last scrolled off part
2762 // fill the rest with spaces
2764 memset(&dest[co], ' ', columns - co);
2768 //----- Refresh the changed screen lines -----------------------
2769 // Copy the source line from text[] into the buffer and note
2770 // if the current screenline is different from the new buffer.
2771 // If they differ then that line needs redrawing on the terminal.
2773 static void refresh(int full_screen)
2775 #define old_offset refresh__old_offset
2778 char *tp, *sp; // pointer into text[] and screen[]
2780 if (ENABLE_FEATURE_VI_WIN_RESIZE) {
2781 unsigned c = columns, r = rows;
2782 get_terminal_width_height(0, &columns, &rows);
2783 if (rows > MAX_SCR_ROWS) rows = MAX_SCR_ROWS;
2784 if (columns > MAX_SCR_COLS) columns = MAX_SCR_COLS;
2785 full_screen |= (c - columns) | (r - rows);
2787 sync_cursor(dot, &crow, &ccol); // where cursor will be (on "dot")
2788 tp = screenbegin; // index into text[] of top line
2790 // compare text[] to screen[] and mark screen[] lines that need updating
2791 for (li = 0; li < rows - 1; li++) {
2792 int cs, ce; // column start & end
2794 // format current text line
2795 out_buf = format_line(tp /*, li*/);
2797 // skip to the end of the current text[] line
2799 char *t = memchr(tp, '\n', end - tp);
2800 if (!t) t = end - 1;
2804 // see if there are any changes between vitual screen and out_buf
2805 changed = FALSE; // assume no change
2808 sp = &screen[li * columns]; // start of screen line
2810 // force re-draw of every single column from 0 - columns-1
2813 // compare newly formatted buffer with virtual screen
2814 // look forward for first difference between buf and screen
2815 for (; cs <= ce; cs++) {
2816 if (out_buf[cs] != sp[cs]) {
2817 changed = TRUE; // mark for redraw
2822 // look backward for last difference between out_buf and screen
2823 for (; ce >= cs; ce--) {
2824 if (out_buf[ce] != sp[ce]) {
2825 changed = TRUE; // mark for redraw
2829 // now, cs is index of first diff, and ce is index of last diff
2831 // if horz offset has changed, force a redraw
2832 if (offset != old_offset) {
2837 // make a sanity check of columns indexes
2839 if (ce > columns - 1) ce = columns - 1;
2840 if (cs > ce) { cs = 0; ce = columns - 1; }
2841 // is there a change between vitual screen and out_buf
2843 // copy changed part of buffer to virtual screen
2844 memcpy(sp+cs, out_buf+cs, ce-cs+1);
2846 // move cursor to column of first change
2847 //if (offset != old_offset) {
2848 // // place_cursor is still too stupid
2849 // // to handle offsets correctly
2850 // place_cursor(li, cs, FALSE);
2852 place_cursor(li, cs, TRUE);
2855 // write line out to terminal
2856 fwrite(&sp[cs], ce - cs + 1, 1, stdout);
2860 place_cursor(crow, ccol, TRUE);
2862 old_offset = offset;
2866 //---------------------------------------------------------------------
2867 //----- the Ascii Chart -----------------------------------------------
2869 // 00 nul 01 soh 02 stx 03 etx 04 eot 05 enq 06 ack 07 bel
2870 // 08 bs 09 ht 0a nl 0b vt 0c np 0d cr 0e so 0f si
2871 // 10 dle 11 dc1 12 dc2 13 dc3 14 dc4 15 nak 16 syn 17 etb
2872 // 18 can 19 em 1a sub 1b esc 1c fs 1d gs 1e rs 1f us
2873 // 20 sp 21 ! 22 " 23 # 24 $ 25 % 26 & 27 '
2874 // 28 ( 29 ) 2a * 2b + 2c , 2d - 2e . 2f /
2875 // 30 0 31 1 32 2 33 3 34 4 35 5 36 6 37 7
2876 // 38 8 39 9 3a : 3b ; 3c < 3d = 3e > 3f ?
2877 // 40 @ 41 A 42 B 43 C 44 D 45 E 46 F 47 G
2878 // 48 H 49 I 4a J 4b K 4c L 4d M 4e N 4f O
2879 // 50 P 51 Q 52 R 53 S 54 T 55 U 56 V 57 W
2880 // 58 X 59 Y 5a Z 5b [ 5c \ 5d ] 5e ^ 5f _
2881 // 60 ` 61 a 62 b 63 c 64 d 65 e 66 f 67 g
2882 // 68 h 69 i 6a j 6b k 6c l 6d m 6e n 6f o
2883 // 70 p 71 q 72 r 73 s 74 t 75 u 76 v 77 w
2884 // 78 x 79 y 7a z 7b { 7c | 7d } 7e ~ 7f del
2885 //---------------------------------------------------------------------
2887 //----- Execute a Vi Command -----------------------------------
2888 static void do_cmd(int c)
2890 const char *msg = msg; // for compiler
2891 char *p, *q, *save_dot;
2897 // c1 = c; // quiet the compiler
2898 // cnt = yf = 0; // quiet the compiler
2899 // msg = p = q = save_dot = buf; // quiet the compiler
2900 memset(buf, '\0', 12);
2904 /* if this is a cursor key, skip these checks */
2912 case KEYCODE_PAGEUP:
2913 case KEYCODE_PAGEDOWN:
2914 case KEYCODE_DELETE:
2918 if (cmd_mode == 2) {
2919 // flip-flop Insert/Replace mode
2920 if (c == KEYCODE_INSERT)
2922 // we are 'R'eplacing the current *dot with new char
2924 // don't Replace past E-o-l
2925 cmd_mode = 1; // convert to insert
2927 if (1 <= c || Isprint(c)) {
2929 dot = yank_delete(dot, dot, 0, YANKDEL); // delete char
2930 dot = char_insert(dot, c); // insert new char
2935 if (cmd_mode == 1) {
2936 // hitting "Insert" twice means "R" replace mode
2937 if (c == KEYCODE_INSERT) goto dc5;
2938 // insert the char c at "dot"
2939 if (1 <= c || Isprint(c)) {
2940 dot = char_insert(dot, c);
2955 #if ENABLE_FEATURE_VI_CRASHME
2956 case 0x14: // dc4 ctrl-T
2957 crashme = (crashme == 0) ? 1 : 0;
2986 //case 'u': // u- FIXME- there is no undo
2988 default: // unrecognized command
2991 not_implemented(buf);
2992 end_cmd_q(); // stop adding to q
2993 case 0x00: // nul- ignore
2995 case 2: // ctrl-B scroll up full screen
2996 case KEYCODE_PAGEUP: // Cursor Key Page Up
2997 dot_scroll(rows - 2, -1);
2999 case 4: // ctrl-D scroll down half screen
3000 dot_scroll((rows - 2) / 2, 1);
3002 case 5: // ctrl-E scroll down one line
3005 case 6: // ctrl-F scroll down full screen
3006 case KEYCODE_PAGEDOWN: // Cursor Key Page Down
3007 dot_scroll(rows - 2, 1);
3009 case 7: // ctrl-G show current status
3010 last_status_cksum = 0; // force status update
3012 case 'h': // h- move left
3013 case KEYCODE_LEFT: // cursor key Left
3014 case 8: // ctrl-H- move left (This may be ERASE char)
3015 case 0x7f: // DEL- move left (This may be ERASE char)
3021 case 10: // Newline ^J
3022 case 'j': // j- goto next line, same col
3023 case KEYCODE_DOWN: // cursor key Down
3027 dot_next(); // go to next B-o-l
3028 dot = move_to_col(dot, ccol + offset); // try stay in same col
3030 case 12: // ctrl-L force redraw whole screen
3031 case 18: // ctrl-R force redraw
3032 place_cursor(0, 0, FALSE); // put cursor in correct place
3033 clear_to_eos(); // tel terminal to erase display
3035 screen_erase(); // erase the internal screen buffer
3036 last_status_cksum = 0; // force status update
3037 refresh(TRUE); // this will redraw the entire display
3039 case 13: // Carriage Return ^M
3040 case '+': // +- goto next line
3047 case 21: // ctrl-U scroll up half screen
3048 dot_scroll((rows - 2) / 2, -1);
3050 case 25: // ctrl-Y scroll up one line
3056 cmd_mode = 0; // stop insrting
3058 last_status_cksum = 0; // force status update
3060 case ' ': // move right
3061 case 'l': // move right
3062 case KEYCODE_RIGHT: // Cursor Key Right
3068 #if ENABLE_FEATURE_VI_YANKMARK
3069 case '"': // "- name a register to use for Delete/Yank
3070 c1 = (get_one_char() | 0x20) - 'a'; // | 0x20 is tolower()
3071 if ((unsigned)c1 <= 25) { // a-z?
3077 case '\'': // '- goto a specific mark
3078 c1 = (get_one_char() | 0x20) - 'a';
3079 if ((unsigned)c1 <= 25) { // a-z?
3082 if (text <= q && q < end) {
3084 dot_begin(); // go to B-o-l
3087 } else if (c1 == '\'') { // goto previous context
3088 dot = swap_context(dot); // swap current and previous context
3089 dot_begin(); // go to B-o-l
3095 case 'm': // m- Mark a line
3096 // this is really stupid. If there are any inserts or deletes
3097 // between text[0] and dot then this mark will not point to the
3098 // correct location! It could be off by many lines!
3099 // Well..., at least its quick and dirty.
3100 c1 = (get_one_char() | 0x20) - 'a';
3101 if ((unsigned)c1 <= 25) { // a-z?
3102 // remember the line
3108 case 'P': // P- Put register before
3109 case 'p': // p- put register after
3112 status_line_bold("Nothing in register %c", what_reg());
3115 // are we putting whole lines or strings
3116 if (strchr(p, '\n') != NULL) {
3118 dot_begin(); // putting lines- Put above
3121 // are we putting after very last line?
3122 if (end_line(dot) == (end - 1)) {
3123 dot = end; // force dot to end of text[]
3125 dot_next(); // next line, then put before
3130 dot_right(); // move to right, can move to NL
3132 string_insert(dot, p); // insert the string
3133 end_cmd_q(); // stop adding to q
3135 case 'U': // U- Undo; replace current line with original version
3136 if (reg[Ureg] != 0) {
3137 p = begin_line(dot);
3139 p = text_hole_delete(p, q); // delete cur line
3140 p += string_insert(p, reg[Ureg]); // insert orig line
3145 #endif /* FEATURE_VI_YANKMARK */
3146 case '$': // $- goto end of line
3147 case KEYCODE_END: // Cursor Key End
3151 dot = end_line(dot);
3153 case '%': // %- find matching char of pair () [] {}
3154 for (q = dot; q < end && *q != '\n'; q++) {
3155 if (strchr("()[]{}", *q) != NULL) {
3156 // we found half of a pair
3157 p = find_pair(q, *q);
3169 case 'f': // f- forward to a user specified char
3170 last_forward_char = get_one_char(); // get the search char
3172 // dont separate these two commands. 'f' depends on ';'
3174 //**** fall through to ... ';'
3175 case ';': // ;- look at rest of line for last forward char
3179 if (last_forward_char == 0)
3182 while (q < end - 1 && *q != '\n' && *q != last_forward_char) {
3185 if (*q == last_forward_char)
3188 case ',': // repeat latest 'f' in opposite direction
3192 if (last_forward_char == 0)
3195 while (q >= text && *q != '\n' && *q != last_forward_char) {
3198 if (q >= text && *q == last_forward_char)
3202 case '-': // -- goto prev line
3209 #if ENABLE_FEATURE_VI_DOT_CMD
3210 case '.': // .- repeat the last modifying command
3211 // Stuff the last_modifying_cmd back into stdin
3212 // and let it be re-executed.
3214 last_modifying_cmd[lmc_len] = 0;
3215 ioq = ioq_start = xstrdup(last_modifying_cmd);
3219 #if ENABLE_FEATURE_VI_SEARCH
3220 case '?': // /- search for a pattern
3221 case '/': // /- search for a pattern
3224 q = get_input_line(buf); // get input line- use "status line"
3225 if (q[0] && !q[1]) {
3226 if (last_search_pattern[0])
3227 last_search_pattern[0] = c;
3228 goto dc3; // if no pat re-use old pat
3230 if (q[0]) { // strlen(q) > 1: new pat- save it and find
3231 // there is a new pat
3232 free(last_search_pattern);
3233 last_search_pattern = xstrdup(q);
3234 goto dc3; // now find the pattern
3236 // user changed mind and erased the "/"- do nothing
3238 case 'N': // N- backward search for last pattern
3242 dir = BACK; // assume BACKWARD search
3244 if (last_search_pattern[0] == '?') {
3248 goto dc4; // now search for pattern
3250 case 'n': // n- repeat search for last pattern
3251 // search rest of text[] starting at next char
3252 // if search fails return orignal "p" not the "p+1" address
3257 dir = FORWARD; // assume FORWARD search
3259 if (last_search_pattern[0] == '?') {
3264 q = char_search(p, last_search_pattern + 1, dir, FULL);
3266 dot = q; // good search, update "dot"
3270 // no pattern found between "dot" and "end"- continue at top
3275 q = char_search(p, last_search_pattern + 1, dir, FULL);
3276 if (q != NULL) { // found something
3277 dot = q; // found new pattern- goto it
3278 msg = "search hit BOTTOM, continuing at TOP";
3280 msg = "search hit TOP, continuing at BOTTOM";
3283 msg = "Pattern not found";
3287 status_line_bold("%s", msg);
3289 case '{': // {- move backward paragraph
3290 q = char_search(dot, "\n\n", BACK, FULL);
3291 if (q != NULL) { // found blank line
3292 dot = next_line(q); // move to next blank line
3295 case '}': // }- move forward paragraph
3296 q = char_search(dot, "\n\n", FORWARD, FULL);
3297 if (q != NULL) { // found blank line
3298 dot = next_line(q); // move to next blank line
3301 #endif /* FEATURE_VI_SEARCH */
3302 case '0': // 0- goto begining of line
3312 if (c == '0' && cmdcnt < 1) {
3313 dot_begin(); // this was a standalone zero
3315 cmdcnt = cmdcnt * 10 + (c - '0'); // this 0 is part of a number
3318 case ':': // :- the colon mode commands
3319 p = get_input_line(":"); // get input line- use "status line"
3320 #if ENABLE_FEATURE_VI_COLON
3321 colon(p); // execute the command
3324 p++; // move past the ':'
3328 if (strncmp(p, "quit", cnt) == 0
3329 || strncmp(p, "q!", cnt) == 0 // delete lines
3331 if (file_modified && p[1] != '!') {
3332 status_line_bold("No write since last change (:quit! overrides)");
3336 } else if (strncmp(p, "write", cnt) == 0
3337 || strncmp(p, "wq", cnt) == 0
3338 || strncmp(p, "wn", cnt) == 0
3339 || (p[0] == 'x' && !p[1])
3341 cnt = file_write(current_filename, text, end - 1);
3344 status_line_bold("Write error: %s", strerror(errno));
3347 last_file_modified = -1;
3348 status_line("\"%s\" %dL, %dC", current_filename, count_lines(text, end - 1), cnt);
3349 if (p[0] == 'x' || p[1] == 'q' || p[1] == 'n'
3350 || p[0] == 'X' || p[1] == 'Q' || p[1] == 'N'
3355 } else if (strncmp(p, "file", cnt) == 0) {
3356 last_status_cksum = 0; // force status update
3357 } else if (sscanf(p, "%d", &j) > 0) {
3358 dot = find_line(j); // go to line # j
3360 } else { // unrecognized cmd
3363 #endif /* !FEATURE_VI_COLON */
3365 case '<': // <- Left shift something
3366 case '>': // >- Right shift something
3367 cnt = count_lines(text, dot); // remember what line we are on
3368 c1 = get_one_char(); // get the type of thing to delete
3369 find_range(&p, &q, c1);
3370 yank_delete(p, q, 1, YANKONLY); // save copy before change
3373 i = count_lines(p, q); // # of lines we are shifting
3374 for ( ; i > 0; i--, p = next_line(p)) {
3376 // shift left- remove tab or 8 spaces
3378 // shrink buffer 1 char
3379 text_hole_delete(p, p);
3380 } else if (*p == ' ') {
3381 // we should be calculating columns, not just SPACE
3382 for (j = 0; *p == ' ' && j < tabstop; j++) {
3383 text_hole_delete(p, p);
3386 } else if (c == '>') {
3387 // shift right -- add tab or 8 spaces
3388 char_insert(p, '\t');
3391 dot = find_line(cnt); // what line were we on
3393 end_cmd_q(); // stop adding to q
3395 case 'A': // A- append at e-o-l
3396 dot_end(); // go to e-o-l
3397 //**** fall through to ... 'a'
3398 case 'a': // a- append after current char
3403 case 'B': // B- back a blank-delimited Word
3404 case 'E': // E- end of a blank-delimited word
3405 case 'W': // W- forward a blank-delimited word
3412 if (c == 'W' || isspace(dot[dir])) {
3413 dot = skip_thing(dot, 1, dir, S_TO_WS);
3414 dot = skip_thing(dot, 2, dir, S_OVER_WS);
3417 dot = skip_thing(dot, 1, dir, S_BEFORE_WS);
3419 case 'C': // C- Change to e-o-l
3420 case 'D': // D- delete to e-o-l
3422 dot = dollar_line(dot); // move to before NL
3423 // copy text into a register and delete
3424 dot = yank_delete(save_dot, dot, 0, YANKDEL); // delete to e-o-l
3426 goto dc_i; // start inserting
3427 #if ENABLE_FEATURE_VI_DOT_CMD
3429 end_cmd_q(); // stop adding to q
3432 case 'g': // 'gg' goto a line number (vim) (default: very first line)
3433 c1 = get_one_char();
3436 buf[1] = c1; // TODO: if Unicode?
3438 not_implemented(buf);
3444 case 'G': // G- goto to a line number (default= E-O-F)
3445 dot = end - 1; // assume E-O-F
3447 dot = find_line(cmdcnt); // what line is #cmdcnt
3451 case 'H': // H- goto top line on screen
3453 if (cmdcnt > (rows - 1)) {
3454 cmdcnt = (rows - 1);
3461 case 'I': // I- insert before first non-blank
3464 //**** fall through to ... 'i'
3465 case 'i': // i- insert before current char
3466 case KEYCODE_INSERT: // Cursor Key Insert
3468 cmd_mode = 1; // start insrting
3470 case 'J': // J- join current and next lines together
3474 dot_end(); // move to NL
3475 if (dot < end - 1) { // make sure not last char in text[]
3476 *dot++ = ' '; // replace NL with space
3478 while (isblank(*dot)) { // delete leading WS
3482 end_cmd_q(); // stop adding to q
3484 case 'L': // L- goto bottom line on screen
3486 if (cmdcnt > (rows - 1)) {
3487 cmdcnt = (rows - 1);
3495 case 'M': // M- goto middle line on screen
3497 for (cnt = 0; cnt < (rows-1) / 2; cnt++)
3498 dot = next_line(dot);
3500 case 'O': // O- open a empty line above
3502 p = begin_line(dot);
3503 if (p[-1] == '\n') {
3505 case 'o': // o- open a empty line below; Yes, I know it is in the middle of the "if (..."
3507 dot = char_insert(dot, '\n');
3510 dot = char_insert(dot, '\n'); // i\n ESC
3515 case 'R': // R- continuous Replace char
3519 case KEYCODE_DELETE:
3522 case 'X': // X- delete char before dot
3523 case 'x': // x- delete the current char
3524 case 's': // s- substitute the current char
3531 if (dot[dir] != '\n') {
3533 dot--; // delete prev char
3534 dot = yank_delete(dot, dot, 0, YANKDEL); // delete char
3537 goto dc_i; // start insrting
3538 end_cmd_q(); // stop adding to q
3540 case 'Z': // Z- if modified, {write}; exit
3541 // ZZ means to save file (if necessary), then exit
3542 c1 = get_one_char();
3547 if (file_modified) {
3548 if (ENABLE_FEATURE_VI_READONLY && readonly_mode) {
3549 status_line_bold("\"%s\" File is read only", current_filename);
3552 cnt = file_write(current_filename, text, end - 1);
3555 status_line_bold("Write error: %s", strerror(errno));
3556 } else if (cnt == (end - 1 - text + 1)) {
3563 case '^': // ^- move to first non-blank on line
3567 case 'b': // b- back a word
3568 case 'e': // e- end of word
3575 if ((dot + dir) < text || (dot + dir) > end - 1)
3578 if (isspace(*dot)) {
3579 dot = skip_thing(dot, (c == 'e') ? 2 : 1, dir, S_OVER_WS);
3581 if (isalnum(*dot) || *dot == '_') {
3582 dot = skip_thing(dot, 1, dir, S_END_ALNUM);
3583 } else if (ispunct(*dot)) {
3584 dot = skip_thing(dot, 1, dir, S_END_PUNCT);
3587 case 'c': // c- change something
3588 case 'd': // d- delete something
3589 #if ENABLE_FEATURE_VI_YANKMARK
3590 case 'y': // y- yank something
3591 case 'Y': // Y- Yank a line
3594 int yf, ml, whole = 0;
3595 yf = YANKDEL; // assume either "c" or "d"
3596 #if ENABLE_FEATURE_VI_YANKMARK
3597 if (c == 'y' || c == 'Y')
3602 c1 = get_one_char(); // get the type of thing to delete
3603 // determine range, and whether it spans lines
3604 ml = find_range(&p, &q, c1);
3605 if (c1 == 27) { // ESC- user changed mind and wants out
3606 c = c1 = 27; // Escape- do nothing
3607 } else if (strchr("wW", c1)) {
3609 // don't include trailing WS as part of word
3610 while (isblank(*q)) {
3611 if (q <= text || q[-1] == '\n')
3616 dot = yank_delete(p, q, ml, yf); // delete word
3617 } else if (strchr("^0bBeEft%$ lh\b\177", c1)) {
3618 // partial line copy text into a register and delete
3619 dot = yank_delete(p, q, ml, yf); // delete word
3620 } else if (strchr("cdykjHL+-{}\r\n", c1)) {
3621 // whole line copy text into a register and delete
3622 dot = yank_delete(p, q, ml, yf); // delete lines
3625 // could not recognize object
3626 c = c1 = 27; // error-
3632 dot = char_insert(dot, '\n');
3633 // on the last line of file don't move to prev line
3634 if (whole && dot != (end-1)) {
3637 } else if (c == 'd') {
3643 // if CHANGING, not deleting, start inserting after the delete
3645 strcpy(buf, "Change");
3646 goto dc_i; // start inserting
3649 strcpy(buf, "Delete");
3651 #if ENABLE_FEATURE_VI_YANKMARK
3652 if (c == 'y' || c == 'Y') {
3653 strcpy(buf, "Yank");
3657 for (cnt = 0; p <= q; p++) {
3661 status_line("%s %d lines (%d chars) using [%c]",
3662 buf, cnt, strlen(reg[YDreg]), what_reg());
3664 end_cmd_q(); // stop adding to q
3668 case 'k': // k- goto prev line, same col
3669 case KEYCODE_UP: // cursor key Up
3674 dot = move_to_col(dot, ccol + offset); // try stay in same col
3676 case 'r': // r- replace the current char with user input
3677 c1 = get_one_char(); // get the replacement char
3682 end_cmd_q(); // stop adding to q
3684 case 't': // t- move to char prior to next x
3685 last_forward_char = get_one_char();
3687 if (*dot == last_forward_char)
3689 last_forward_char = 0;
3691 case 'w': // w- forward a word
3695 if (isalnum(*dot) || *dot == '_') { // we are on ALNUM
3696 dot = skip_thing(dot, 1, FORWARD, S_END_ALNUM);
3697 } else if (ispunct(*dot)) { // we are on PUNCT
3698 dot = skip_thing(dot, 1, FORWARD, S_END_PUNCT);
3701 dot++; // move over word
3702 if (isspace(*dot)) {
3703 dot = skip_thing(dot, 2, FORWARD, S_OVER_WS);
3707 c1 = get_one_char(); // get the replacement char
3710 cnt = (rows - 2) / 2; // put dot at center
3712 cnt = rows - 2; // put dot at bottom
3713 screenbegin = begin_line(dot); // start dot at top
3714 dot_scroll(cnt, -1);
3716 case '|': // |- move to column "cmdcnt"
3717 dot = move_to_col(dot, cmdcnt - 1); // try to move to column
3719 case '~': // ~- flip the case of letters a-z -> A-Z
3723 if (islower(*dot)) {
3724 *dot = toupper(*dot);
3726 } else if (isupper(*dot)) {
3727 *dot = tolower(*dot);
3731 end_cmd_q(); // stop adding to q
3733 //----- The Cursor and Function Keys -----------------------------
3734 case KEYCODE_HOME: // Cursor Key Home
3737 // The Fn keys could point to do_macro which could translate them
3739 case KEYCODE_FUN1: // Function Key F1
3740 case KEYCODE_FUN2: // Function Key F2
3741 case KEYCODE_FUN3: // Function Key F3
3742 case KEYCODE_FUN4: // Function Key F4
3743 case KEYCODE_FUN5: // Function Key F5
3744 case KEYCODE_FUN6: // Function Key F6
3745 case KEYCODE_FUN7: // Function Key F7
3746 case KEYCODE_FUN8: // Function Key F8
3747 case KEYCODE_FUN9: // Function Key F9
3748 case KEYCODE_FUN10: // Function Key F10
3749 case KEYCODE_FUN11: // Function Key F11
3750 case KEYCODE_FUN12: // Function Key F12
3756 // if text[] just became empty, add back an empty line
3758 char_insert(text, '\n'); // start empty buf with dummy line
3761 // it is OK for dot to exactly equal to end, otherwise check dot validity
3763 dot = bound_dot(dot); // make sure "dot" is valid
3765 #if ENABLE_FEATURE_VI_YANKMARK
3766 check_context(c); // update the current context
3770 cmdcnt = 0; // cmd was not a number, reset cmdcnt
3771 cnt = dot - begin_line(dot);
3772 // Try to stay off of the Newline
3773 if (*dot == '\n' && cnt > 0 && cmd_mode == 0)
3777 /* NB! the CRASHME code is unmaintained, and doesn't currently build */
3778 #if ENABLE_FEATURE_VI_CRASHME
3779 static int totalcmds = 0;
3780 static int Mp = 85; // Movement command Probability
3781 static int Np = 90; // Non-movement command Probability
3782 static int Dp = 96; // Delete command Probability
3783 static int Ip = 97; // Insert command Probability
3784 static int Yp = 98; // Yank command Probability
3785 static int Pp = 99; // Put command Probability
3786 static int M = 0, N = 0, I = 0, D = 0, Y = 0, P = 0, U = 0;
3787 static const char chars[20] = "\t012345 abcdABCD-=.$";
3788 static const char *const words[20] = {
3789 "this", "is", "a", "test",
3790 "broadcast", "the", "emergency", "of",
3791 "system", "quick", "brown", "fox",
3792 "jumped", "over", "lazy", "dogs",
3793 "back", "January", "Febuary", "March"
3795 static const char *const lines[20] = {
3796 "You should have received a copy of the GNU General Public License\n",
3797 "char c, cm, *cmd, *cmd1;\n",
3798 "generate a command by percentages\n",
3799 "Numbers may be typed as a prefix to some commands.\n",
3800 "Quit, discarding changes!\n",
3801 "Forced write, if permission originally not valid.\n",
3802 "In general, any ex or ed command (such as substitute or delete).\n",
3803 "I have tickets available for the Blazers vs LA Clippers for Monday, Janurary 1 at 1:00pm.\n",
3804 "Please get w/ me and I will go over it with you.\n",
3805 "The following is a list of scheduled, committed changes.\n",
3806 "1. Launch Norton Antivirus (Start, Programs, Norton Antivirus)\n",
3807 "Reminder....Town Meeting in Central Perk cafe today at 3:00pm.\n",
3808 "Any question about transactions please contact Sterling Huxley.\n",
3809 "I will try to get back to you by Friday, December 31.\n",
3810 "This Change will be implemented on Friday.\n",
3811 "Let me know if you have problems accessing this;\n",
3812 "Sterling Huxley recently added you to the access list.\n",
3813 "Would you like to go to lunch?\n",
3814 "The last command will be automatically run.\n",
3815 "This is too much english for a computer geek.\n",
3817 static char *multilines[20] = {
3818 "You should have received a copy of the GNU General Public License\n",
3819 "char c, cm, *cmd, *cmd1;\n",
3820 "generate a command by percentages\n",
3821 "Numbers may be typed as a prefix to some commands.\n",
3822 "Quit, discarding changes!\n",
3823 "Forced write, if permission originally not valid.\n",
3824 "In general, any ex or ed command (such as substitute or delete).\n",
3825 "I have tickets available for the Blazers vs LA Clippers for Monday, Janurary 1 at 1:00pm.\n",
3826 "Please get w/ me and I will go over it with you.\n",
3827 "The following is a list of scheduled, committed changes.\n",
3828 "1. Launch Norton Antivirus (Start, Programs, Norton Antivirus)\n",
3829 "Reminder....Town Meeting in Central Perk cafe today at 3:00pm.\n",
3830 "Any question about transactions please contact Sterling Huxley.\n",
3831 "I will try to get back to you by Friday, December 31.\n",
3832 "This Change will be implemented on Friday.\n",
3833 "Let me know if you have problems accessing this;\n",
3834 "Sterling Huxley recently added you to the access list.\n",
3835 "Would you like to go to lunch?\n",
3836 "The last command will be automatically run.\n",
3837 "This is too much english for a computer geek.\n",
3840 // create a random command to execute
3841 static void crash_dummy()
3843 static int sleeptime; // how long to pause between commands
3844 char c, cm, *cmd, *cmd1;
3845 int i, cnt, thing, rbi, startrbi, percent;
3847 // "dot" movement commands
3848 cmd1 = " \n\r\002\004\005\006\025\0310^$-+wWeEbBhjklHL";
3850 // is there already a command running?
3851 if (readbuffer[0] > 0)
3854 readbuffer[0] = 'X';
3856 sleeptime = 0; // how long to pause between commands
3857 memset(readbuffer, '\0', sizeof(readbuffer));
3858 // generate a command by percentages
3859 percent = (int) lrand48() % 100; // get a number from 0-99
3860 if (percent < Mp) { // Movement commands
3861 // available commands
3864 } else if (percent < Np) { // non-movement commands
3865 cmd = "mz<>\'\""; // available commands
3867 } else if (percent < Dp) { // Delete commands
3868 cmd = "dx"; // available commands
3870 } else if (percent < Ip) { // Inset commands
3871 cmd = "iIaAsrJ"; // available commands
3873 } else if (percent < Yp) { // Yank commands
3874 cmd = "yY"; // available commands
3876 } else if (percent < Pp) { // Put commands
3877 cmd = "pP"; // available commands
3880 // We do not know how to handle this command, try again
3884 // randomly pick one of the available cmds from "cmd[]"
3885 i = (int) lrand48() % strlen(cmd);
3887 if (strchr(":\024", cm))
3888 goto cd0; // dont allow colon or ctrl-T commands
3889 readbuffer[rbi++] = cm; // put cmd into input buffer
3891 // now we have the command-
3892 // there are 1, 2, and multi char commands
3893 // find out which and generate the rest of command as necessary
3894 if (strchr("dmryz<>\'\"", cm)) { // 2-char commands
3895 cmd1 = " \n\r0$^-+wWeEbBhjklHL";
3896 if (cm == 'm' || cm == '\'' || cm == '\"') { // pick a reg[]
3897 cmd1 = "abcdefghijklmnopqrstuvwxyz";
3899 thing = (int) lrand48() % strlen(cmd1); // pick a movement command
3901 readbuffer[rbi++] = c; // add movement to input buffer
3903 if (strchr("iIaAsc", cm)) { // multi-char commands
3905 // change some thing
3906 thing = (int) lrand48() % strlen(cmd1); // pick a movement command
3908 readbuffer[rbi++] = c; // add movement to input buffer
3910 thing = (int) lrand48() % 4; // what thing to insert
3911 cnt = (int) lrand48() % 10; // how many to insert
3912 for (i = 0; i < cnt; i++) {
3913 if (thing == 0) { // insert chars
3914 readbuffer[rbi++] = chars[((int) lrand48() % strlen(chars))];
3915 } else if (thing == 1) { // insert words
3916 strcat(readbuffer, words[(int) lrand48() % 20]);
3917 strcat(readbuffer, " ");
3918 sleeptime = 0; // how fast to type
3919 } else if (thing == 2) { // insert lines
3920 strcat(readbuffer, lines[(int) lrand48() % 20]);
3921 sleeptime = 0; // how fast to type
3922 } else { // insert multi-lines
3923 strcat(readbuffer, multilines[(int) lrand48() % 20]);
3924 sleeptime = 0; // how fast to type
3927 strcat(readbuffer, "\033");
3929 readbuffer[0] = strlen(readbuffer + 1);
3933 mysleep(sleeptime); // sleep 1/100 sec
3936 // test to see if there are any errors
3937 static void crash_test()
3939 static time_t oldtim;
3946 strcat(msg, "end<text ");
3948 if (end > textend) {
3949 strcat(msg, "end>textend ");
3952 strcat(msg, "dot<text ");
3955 strcat(msg, "dot>end ");
3957 if (screenbegin < text) {
3958 strcat(msg, "screenbegin<text ");
3960 if (screenbegin > end - 1) {
3961 strcat(msg, "screenbegin>end-1 ");
3965 printf("\n\n%d: \'%c\' %s\n\n\n%s[Hit return to continue]%s",
3966 totalcmds, last_input_char, msg, SOs, SOn);
3968 while (safe_read(STDIN_FILENO, d, 1) > 0) {
3969 if (d[0] == '\n' || d[0] == '\r')
3974 if (tim >= (oldtim + 3)) {
3975 sprintf(status_buffer,
3976 "Tot=%d: M=%d N=%d I=%d D=%d Y=%d P=%d U=%d size=%d",
3977 totalcmds, M, N, I, D, Y, P, U, end - text + 1);