1 /* vi: set sw=8 ts=8: */
3 * tiny vi.c: A small 'vi' clone
4 * Copyright (C) 2000, 2001 Sterling Huxley <sterling@europa.com>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 static const char vi_Version[] =
22 "$Id: vi.c,v 1.38 2004/08/19 19:15:06 andersen Exp $";
25 * To compile for standalone use:
26 * gcc -Wall -Os -s -DSTANDALONE -o vi vi.c
28 * gcc -Wall -Os -s -DSTANDALONE -DCONFIG_FEATURE_VI_CRASHME -o vi vi.c # include testing features
35 * $HOME/.exrc and ./.exrc
36 * add magic to search /foo.*bar
39 * how about mode lines: vi: set sw=8 ts=8:
40 * if mark[] values were line numbers rather than pointers
41 * it would be easier to change the mark when add/delete lines
42 * More intelligence in refresh()
43 * ":r !cmd" and "!cmd" to filter text through an external command
44 * A true "undo" facility
45 * An "ex" line oriented mode- maybe using "cmdedit"
48 //---- Feature -------------- Bytes to implement
51 #define CONFIG_FEATURE_VI_COLON // 4288
52 #define CONFIG_FEATURE_VI_YANKMARK // 1408
53 #define CONFIG_FEATURE_VI_SEARCH // 1088
54 #define CONFIG_FEATURE_VI_USE_SIGNALS // 1056
55 #define CONFIG_FEATURE_VI_DOT_CMD // 576
56 #define CONFIG_FEATURE_VI_READONLY // 128
57 #define CONFIG_FEATURE_VI_SETOPTS // 576
58 #define CONFIG_FEATURE_VI_SET // 224
59 #define CONFIG_FEATURE_VI_WIN_RESIZE // 256 WIN_RESIZE
60 // To test editor using CRASHME:
62 // To stop testing, wait until all to text[] is deleted, or
63 // Ctrl-Z and kill -9 %1
64 // while in the editor Ctrl-T will toggle the crashme function on and off.
65 //#define CONFIG_FEATURE_VI_CRASHME // randomly pick commands to execute
66 #endif /* STANDALONE */
73 #include <sys/ioctl.h>
75 #include <sys/types.h>
88 #endif /* STANDALONE */
90 #ifdef CONFIG_LOCALE_SUPPORT
91 #define Isprint(c) isprint((c))
93 #define Isprint(c) ( (c) >= ' ' && (c) != 127 && (c) != ((unsigned char)'\233') )
98 #define FALSE ((int)0)
100 #define MAX_SCR_COLS BUFSIZ
102 // Misc. non-Ascii keys that report an escape sequence
103 #define VI_K_UP 128 // cursor key Up
104 #define VI_K_DOWN 129 // cursor key Down
105 #define VI_K_RIGHT 130 // Cursor Key Right
106 #define VI_K_LEFT 131 // cursor key Left
107 #define VI_K_HOME 132 // Cursor Key Home
108 #define VI_K_END 133 // Cursor Key End
109 #define VI_K_INSERT 134 // Cursor Key Insert
110 #define VI_K_PAGEUP 135 // Cursor Key Page Up
111 #define VI_K_PAGEDOWN 136 // Cursor Key Page Down
112 #define VI_K_FUN1 137 // Function Key F1
113 #define VI_K_FUN2 138 // Function Key F2
114 #define VI_K_FUN3 139 // Function Key F3
115 #define VI_K_FUN4 140 // Function Key F4
116 #define VI_K_FUN5 141 // Function Key F5
117 #define VI_K_FUN6 142 // Function Key F6
118 #define VI_K_FUN7 143 // Function Key F7
119 #define VI_K_FUN8 144 // Function Key F8
120 #define VI_K_FUN9 145 // Function Key F9
121 #define VI_K_FUN10 146 // Function Key F10
122 #define VI_K_FUN11 147 // Function Key F11
123 #define VI_K_FUN12 148 // Function Key F12
125 /* vt102 typical ESC sequence */
126 /* terminal standout start/normal ESC sequence */
127 static const char SOs[] = "\033[7m";
128 static const char SOn[] = "\033[0m";
129 /* terminal bell sequence */
130 static const char bell[] = "\007";
131 /* Clear-end-of-line and Clear-end-of-screen ESC sequence */
132 static const char Ceol[] = "\033[0K";
133 static const char Ceos [] = "\033[0J";
134 /* Cursor motion arbitrary destination ESC sequence */
135 static const char CMrc[] = "\033[%d;%dH";
136 /* Cursor motion up and down ESC sequence */
137 static const char CMup[] = "\033[A";
138 static const char CMdown[] = "\n";
141 static const int YANKONLY = FALSE;
142 static const int YANKDEL = TRUE;
143 static const int FORWARD = 1; // code depends on "1" for array index
144 static const int BACK = -1; // code depends on "-1" for array index
145 static const int LIMITED = 0; // how much of text[] in char_search
146 static const int FULL = 1; // how much of text[] in char_search
148 static const int S_BEFORE_WS = 1; // used in skip_thing() for moving "dot"
149 static const int S_TO_WS = 2; // used in skip_thing() for moving "dot"
150 static const int S_OVER_WS = 3; // used in skip_thing() for moving "dot"
151 static const int S_END_PUNCT = 4; // used in skip_thing() for moving "dot"
152 static const int S_END_ALNUM = 5; // used in skip_thing() for moving "dot"
154 typedef unsigned char Byte;
156 static int vi_setops;
157 #define VI_AUTOINDENT 1
158 #define VI_SHOWMATCH 2
159 #define VI_IGNORECASE 4
160 #define VI_ERR_METHOD 8
161 #define autoindent (vi_setops & VI_AUTOINDENT)
162 #define showmatch (vi_setops & VI_SHOWMATCH )
163 #define ignorecase (vi_setops & VI_IGNORECASE)
164 /* indicate error with beep or flash */
165 #define err_method (vi_setops & VI_ERR_METHOD)
168 static int editing; // >0 while we are editing a file
169 static int cmd_mode; // 0=command 1=insert
170 static int file_modified; // buffer contents changed
171 static int fn_start; // index of first cmd line file name
172 static int save_argc; // how many file names on cmd line
173 static int cmdcnt; // repetition count
174 static fd_set rfds; // use select() for small sleeps
175 static struct timeval tv; // use select() for small sleeps
176 static int rows, columns; // the terminal screen is this size
177 static int crow, ccol, offset; // cursor is on Crow x Ccol with Horz Ofset
178 static Byte *status_buffer; // mesages to the user
179 static Byte *cfn; // previous, current, and next file name
180 static Byte *text, *end, *textend; // pointers to the user data in memory
181 static Byte *screen; // pointer to the virtual screen buffer
182 static int screensize; // and its size
183 static Byte *screenbegin; // index into text[], of top line on the screen
184 static Byte *dot; // where all the action takes place
186 static struct termios term_orig, term_vi; // remember what the cooked mode was
187 static Byte erase_char; // the users erase character
188 static Byte last_input_char; // last char read from user
189 static Byte last_forward_char; // last char searched for with 'f'
191 #ifdef CONFIG_FEATURE_VI_OPTIMIZE_CURSOR
192 static int last_row; // where the cursor was last moved to
193 #endif /* CONFIG_FEATURE_VI_OPTIMIZE_CURSOR */
194 #ifdef CONFIG_FEATURE_VI_USE_SIGNALS
195 static jmp_buf restart; // catch_sig()
196 #endif /* CONFIG_FEATURE_VI_USE_SIGNALS */
197 #if defined(CONFIG_FEATURE_VI_USE_SIGNALS) || defined(CONFIG_FEATURE_VI_CRASHME)
200 #ifdef CONFIG_FEATURE_VI_DOT_CMD
201 static int adding2q; // are we currently adding user input to q
202 static Byte *last_modifying_cmd; // last modifying cmd for "."
203 static Byte *ioq, *ioq_start; // pointer to string for get_one_char to "read"
204 #endif /* CONFIG_FEATURE_VI_DOT_CMD */
205 #if defined(CONFIG_FEATURE_VI_DOT_CMD) || defined(CONFIG_FEATURE_VI_YANKMARK)
206 static Byte *modifying_cmds; // cmds that modify text[]
207 #endif /* CONFIG_FEATURE_VI_DOT_CMD || CONFIG_FEATURE_VI_YANKMARK */
208 #ifdef CONFIG_FEATURE_VI_READONLY
209 static int vi_readonly, readonly;
210 #endif /* CONFIG_FEATURE_VI_READONLY */
211 #ifdef CONFIG_FEATURE_VI_YANKMARK
212 static Byte *reg[28]; // named register a-z, "D", and "U" 0-25,26,27
213 static int YDreg, Ureg; // default delete register and orig line for "U"
214 static Byte *mark[28]; // user marks points somewhere in text[]- a-z and previous context ''
215 static Byte *context_start, *context_end;
216 #endif /* CONFIG_FEATURE_VI_YANKMARK */
217 #ifdef CONFIG_FEATURE_VI_SEARCH
218 static Byte *last_search_pattern; // last pattern from a '/' or '?' search
219 #endif /* CONFIG_FEATURE_VI_SEARCH */
222 static void edit_file(Byte *); // edit one file
223 static void do_cmd(Byte); // execute a command
224 static void sync_cursor(Byte *, int *, int *); // synchronize the screen cursor to dot
225 static Byte *begin_line(Byte *); // return pointer to cur line B-o-l
226 static Byte *end_line(Byte *); // return pointer to cur line E-o-l
227 static Byte *prev_line(Byte *); // return pointer to prev line B-o-l
228 static Byte *next_line(Byte *); // return pointer to next line B-o-l
229 static Byte *end_screen(void); // get pointer to last char on screen
230 static int count_lines(Byte *, Byte *); // count line from start to stop
231 static Byte *find_line(int); // find begining of line #li
232 static Byte *move_to_col(Byte *, int); // move "p" to column l
233 static int isblnk(Byte); // is the char a blank or tab
234 static void dot_left(void); // move dot left- dont leave line
235 static void dot_right(void); // move dot right- dont leave line
236 static void dot_begin(void); // move dot to B-o-l
237 static void dot_end(void); // move dot to E-o-l
238 static void dot_next(void); // move dot to next line B-o-l
239 static void dot_prev(void); // move dot to prev line B-o-l
240 static void dot_scroll(int, int); // move the screen up or down
241 static void dot_skip_over_ws(void); // move dot pat WS
242 static void dot_delete(void); // delete the char at 'dot'
243 static Byte *bound_dot(Byte *); // make sure text[0] <= P < "end"
244 static Byte *new_screen(int, int); // malloc virtual screen memory
245 static Byte *new_text(int); // malloc memory for text[] buffer
246 static Byte *char_insert(Byte *, Byte); // insert the char c at 'p'
247 static Byte *stupid_insert(Byte *, Byte); // stupidly insert the char c at 'p'
248 static Byte find_range(Byte **, Byte **, Byte); // return pointers for an object
249 static int st_test(Byte *, int, int, Byte *); // helper for skip_thing()
250 static Byte *skip_thing(Byte *, int, int, int); // skip some object
251 static Byte *find_pair(Byte *, Byte); // find matching pair () [] {}
252 static Byte *text_hole_delete(Byte *, Byte *); // at "p", delete a 'size' byte hole
253 static Byte *text_hole_make(Byte *, int); // at "p", make a 'size' byte hole
254 static Byte *yank_delete(Byte *, Byte *, int, int); // yank text[] into register then delete
255 static void show_help(void); // display some help info
256 static void rawmode(void); // set "raw" mode on tty
257 static void cookmode(void); // return to "cooked" mode on tty
258 static int mysleep(int); // sleep for 'h' 1/100 seconds
259 static Byte readit(void); // read (maybe cursor) key from stdin
260 static Byte get_one_char(void); // read 1 char from stdin
261 static int file_size(const Byte *); // what is the byte size of "fn"
262 static int file_insert(Byte *, Byte *, int);
263 static int file_write(Byte *, Byte *, Byte *);
264 static void place_cursor(int, int, int);
265 static void screen_erase(void);
266 static void clear_to_eol(void);
267 static void clear_to_eos(void);
268 static void standout_start(void); // send "start reverse video" sequence
269 static void standout_end(void); // send "end reverse video" sequence
270 static void flash(int); // flash the terminal screen
271 static void show_status_line(void); // put a message on the bottom line
272 static void psb(const char *, ...); // Print Status Buf
273 static void psbs(const char *, ...); // Print Status Buf in standout mode
274 static void ni(Byte *); // display messages
275 static void edit_status(void); // show file status on status line
276 static void redraw(int); // force a full screen refresh
277 static void format_line(Byte*, Byte*, int);
278 static void refresh(int); // update the terminal from screen[]
280 static void Indicate_Error(void); // use flash or beep to indicate error
281 #define indicate_error(c) Indicate_Error()
283 #ifdef CONFIG_FEATURE_VI_SEARCH
284 static Byte *char_search(Byte *, Byte *, int, int); // search for pattern starting at p
285 static int mycmp(Byte *, Byte *, int); // string cmp based in "ignorecase"
286 #endif /* CONFIG_FEATURE_VI_SEARCH */
287 #ifdef CONFIG_FEATURE_VI_COLON
288 static void Hit_Return(void);
289 static Byte *get_one_address(Byte *, int *); // get colon addr, if present
290 static Byte *get_address(Byte *, int *, int *); // get two colon addrs, if present
291 static void colon(Byte *); // execute the "colon" mode cmds
292 #endif /* CONFIG_FEATURE_VI_COLON */
293 #ifdef CONFIG_FEATURE_VI_USE_SIGNALS
294 static void winch_sig(int); // catch window size changes
295 static void suspend_sig(int); // catch ctrl-Z
296 static void catch_sig(int); // catch ctrl-C and alarm time-outs
297 static void core_sig(int); // catch a core dump signal
298 #endif /* CONFIG_FEATURE_VI_USE_SIGNALS */
299 #ifdef CONFIG_FEATURE_VI_DOT_CMD
300 static void start_new_cmd_q(Byte); // new queue for command
301 static void end_cmd_q(void); // stop saving input chars
302 #else /* CONFIG_FEATURE_VI_DOT_CMD */
304 #endif /* CONFIG_FEATURE_VI_DOT_CMD */
305 #ifdef CONFIG_FEATURE_VI_WIN_RESIZE
306 static void window_size_get(int); // find out what size the window is
307 #endif /* CONFIG_FEATURE_VI_WIN_RESIZE */
308 #ifdef CONFIG_FEATURE_VI_SETOPTS
309 static void showmatching(Byte *); // show the matching pair () [] {}
310 #endif /* CONFIG_FEATURE_VI_SETOPTS */
311 #if defined(CONFIG_FEATURE_VI_YANKMARK) || defined(CONFIG_FEATURE_VI_COLON) || defined(CONFIG_FEATURE_VI_CRASHME)
312 static Byte *string_insert(Byte *, Byte *); // insert the string at 'p'
313 #endif /* CONFIG_FEATURE_VI_YANKMARK || CONFIG_FEATURE_VI_COLON || CONFIG_FEATURE_VI_CRASHME */
314 #ifdef CONFIG_FEATURE_VI_YANKMARK
315 static Byte *text_yank(Byte *, Byte *, int); // save copy of "p" into a register
316 static Byte what_reg(void); // what is letter of current YDreg
317 static void check_context(Byte); // remember context for '' command
318 #endif /* CONFIG_FEATURE_VI_YANKMARK */
319 #ifdef CONFIG_FEATURE_VI_CRASHME
320 static void crash_dummy();
321 static void crash_test();
322 static int crashme = 0;
323 #endif /* CONFIG_FEATURE_VI_CRASHME */
326 static void write1(const char *out)
331 extern int vi_main(int argc, char **argv)
334 RESERVE_CONFIG_BUFFER(STATUS_BUFFER, 200);
336 #ifdef CONFIG_FEATURE_VI_YANKMARK
338 #endif /* CONFIG_FEATURE_VI_YANKMARK */
339 #if defined(CONFIG_FEATURE_VI_USE_SIGNALS) || defined(CONFIG_FEATURE_VI_CRASHME)
342 #ifdef CONFIG_FEATURE_VI_CRASHME
343 (void) srand((long) my_pid);
344 #endif /* CONFIG_FEATURE_VI_CRASHME */
346 status_buffer = STATUS_BUFFER;
348 #ifdef CONFIG_FEATURE_VI_READONLY
349 vi_readonly = readonly = FALSE;
350 if (strncmp(argv[0], "view", 4) == 0) {
354 #endif /* CONFIG_FEATURE_VI_READONLY */
355 vi_setops = VI_AUTOINDENT | VI_SHOWMATCH | VI_IGNORECASE | VI_ERR_METHOD;
356 #ifdef CONFIG_FEATURE_VI_YANKMARK
357 for (i = 0; i < 28; i++) {
359 } // init the yank regs
360 #endif /* CONFIG_FEATURE_VI_YANKMARK */
361 #if defined(CONFIG_FEATURE_VI_DOT_CMD) || defined(CONFIG_FEATURE_VI_YANKMARK)
362 modifying_cmds = (Byte *) "aAcCdDiIJoOpPrRsxX<>~"; // cmds modifying text[]
363 #endif /* CONFIG_FEATURE_VI_DOT_CMD */
365 // 1- process $HOME/.exrc file
366 // 2- process EXINIT variable from environment
367 // 3- process command line args
368 while ((c = getopt(argc, argv, "hCR")) != -1) {
370 #ifdef CONFIG_FEATURE_VI_CRASHME
374 #endif /* CONFIG_FEATURE_VI_CRASHME */
375 #ifdef CONFIG_FEATURE_VI_READONLY
376 case 'R': // Read-only flag
380 #endif /* CONFIG_FEATURE_VI_READONLY */
381 //case 'r': // recover flag- ignore- we don't use tmp file
382 //case 'x': // encryption flag- ignore
383 //case 'c': // execute command first
384 //case 'h': // help -- just use default
391 // The argv array can be used by the ":next" and ":rewind" commands
393 fn_start = optind; // remember first file name for :next and :rew
396 //----- This is the main file handling loop --------------
397 if (optind >= argc) {
398 editing = 1; // 0= exit, 1= one file, 2= multiple files
401 for (; optind < argc; optind++) {
402 editing = 1; // 0=exit, 1=one file, 2+ =many files
404 cfn = (Byte *) bb_xstrdup(argv[optind]);
408 //-----------------------------------------------------------
413 #ifdef CONFIG_FEATURE_VI_WIN_RESIZE
414 //----- See what the window size currently is --------------------
415 static inline void window_size_get(int fd)
417 get_terminal_width_height(fd, &columns, &rows);
419 #endif /* CONFIG_FEATURE_VI_WIN_RESIZE */
421 static void edit_file(Byte * fn)
426 #ifdef CONFIG_FEATURE_VI_USE_SIGNALS
428 #endif /* CONFIG_FEATURE_VI_USE_SIGNALS */
429 #ifdef CONFIG_FEATURE_VI_YANKMARK
430 static Byte *cur_line;
431 #endif /* CONFIG_FEATURE_VI_YANKMARK */
437 #ifdef CONFIG_FEATURE_VI_WIN_RESIZE
439 #endif /* CONFIG_FEATURE_VI_WIN_RESIZE */
440 new_screen(rows, columns); // get memory for virtual screen
442 cnt = file_size(fn); // file size
443 size = 2 * cnt; // 200% of file size
444 new_text(size); // get a text[] buffer
445 screenbegin = dot = end = text;
447 ch= file_insert(fn, text, cnt);
450 (void) char_insert(text, '\n'); // start empty buf with dummy line
452 file_modified = FALSE;
453 #ifdef CONFIG_FEATURE_VI_YANKMARK
454 YDreg = 26; // default Yank/Delete reg
455 Ureg = 27; // hold orig line for "U" cmd
456 for (cnt = 0; cnt < 28; cnt++) {
459 mark[26] = mark[27] = text; // init "previous context"
460 #endif /* CONFIG_FEATURE_VI_YANKMARK */
462 last_forward_char = last_input_char = '\0';
467 #ifdef CONFIG_FEATURE_VI_USE_SIGNALS
470 signal(SIGWINCH, winch_sig);
471 signal(SIGTSTP, suspend_sig);
472 sig = setjmp(restart);
474 const char *msg = "";
477 msg = "(window resize)";
487 msg = "(I tried to touch invalid memory)";
491 psbs("-- caught signal %d %s--", sig, msg);
492 screenbegin = dot = text;
494 #endif /* CONFIG_FEATURE_VI_USE_SIGNALS */
497 cmd_mode = 0; // 0=command 1=insert 2='R'eplace
500 offset = 0; // no horizontal offset
502 #ifdef CONFIG_FEATURE_VI_DOT_CMD
503 free(last_modifying_cmd);
505 ioq = ioq_start = last_modifying_cmd = 0;
507 #endif /* CONFIG_FEATURE_VI_DOT_CMD */
508 redraw(FALSE); // dont force every col re-draw
511 //------This is the main Vi cmd handling loop -----------------------
512 while (editing > 0) {
513 #ifdef CONFIG_FEATURE_VI_CRASHME
515 if ((end - text) > 1) {
516 crash_dummy(); // generate a random command
520 string_insert(text, (Byte *) "\n\n##### Ran out of text to work on. #####\n\n"); // insert the string
524 #endif /* CONFIG_FEATURE_VI_CRASHME */
525 last_input_char = c = get_one_char(); // get a cmd from user
526 #ifdef CONFIG_FEATURE_VI_YANKMARK
527 // save a copy of the current line- for the 'U" command
528 if (begin_line(dot) != cur_line) {
529 cur_line = begin_line(dot);
530 text_yank(begin_line(dot), end_line(dot), Ureg);
532 #endif /* CONFIG_FEATURE_VI_YANKMARK */
533 #ifdef CONFIG_FEATURE_VI_DOT_CMD
534 // These are commands that change text[].
535 // Remember the input for the "." command
536 if (!adding2q && ioq_start == 0
537 && strchr((char *) modifying_cmds, c) != NULL) {
540 #endif /* CONFIG_FEATURE_VI_DOT_CMD */
541 do_cmd(c); // execute the user command
543 // poll to see if there is input already waiting. if we are
544 // not able to display output fast enough to keep up, skip
545 // the display update until we catch up with input.
546 if (mysleep(0) == 0) {
547 // no input pending- so update output
551 #ifdef CONFIG_FEATURE_VI_CRASHME
553 crash_test(); // test editor variables
554 #endif /* CONFIG_FEATURE_VI_CRASHME */
556 //-------------------------------------------------------------------
558 place_cursor(rows, 0, FALSE); // go to bottom of screen
559 clear_to_eol(); // Erase to end of line
563 //----- The Colon commands -------------------------------------
564 #ifdef CONFIG_FEATURE_VI_COLON
565 static Byte *get_one_address(Byte * p, int *addr) // get colon addr, if present
570 #ifdef CONFIG_FEATURE_VI_YANKMARK
572 #endif /* CONFIG_FEATURE_VI_YANKMARK */
573 #ifdef CONFIG_FEATURE_VI_SEARCH
574 Byte *pat, buf[BUFSIZ];
575 #endif /* CONFIG_FEATURE_VI_SEARCH */
577 *addr = -1; // assume no addr
578 if (*p == '.') { // the current line
581 *addr = count_lines(text, q);
582 #ifdef CONFIG_FEATURE_VI_YANKMARK
583 } else if (*p == '\'') { // is this a mark addr
587 if (c >= 'a' && c <= 'z') {
591 if (q != NULL) { // is mark valid
592 *addr = count_lines(text, q); // count lines
595 #endif /* CONFIG_FEATURE_VI_YANKMARK */
596 #ifdef CONFIG_FEATURE_VI_SEARCH
597 } else if (*p == '/') { // a search pattern
605 pat = (Byte *) bb_xstrdup((char *) buf); // save copy of pattern
608 q = char_search(dot, pat, FORWARD, FULL);
610 *addr = count_lines(text, q);
613 #endif /* CONFIG_FEATURE_VI_SEARCH */
614 } else if (*p == '$') { // the last line in file
616 q = begin_line(end - 1);
617 *addr = count_lines(text, q);
618 } else if (isdigit(*p)) { // specific line number
619 sscanf((char *) p, "%d%n", addr, &st);
621 } else { // I don't reconise this
622 // unrecognised address- assume -1
628 static Byte *get_address(Byte *p, int *b, int *e) // get two colon addrs, if present
630 //----- get the address' i.e., 1,3 'a,'b -----
631 // get FIRST addr, if present
633 p++; // skip over leading spaces
634 if (*p == '%') { // alias for 1,$
637 *e = count_lines(text, end-1);
640 p = get_one_address(p, b);
643 if (*p == ',') { // is there a address separator
647 // get SECOND addr, if present
648 p = get_one_address(p, e);
652 p++; // skip over trailing spaces
656 #ifdef CONFIG_FEATURE_VI_SETOPTS
657 static void setops(const Byte *args, const char *opname, int flg_no,
658 const char *short_opname, int opt)
660 const char *a = (char *) args + flg_no;
661 int l = strlen(opname) - 1; /* opname have + ' ' */
663 if (strncasecmp(a, opname, l) == 0 ||
664 strncasecmp(a, short_opname, 2) == 0) {
673 static void colon(Byte * buf)
675 Byte c, *orig_buf, *buf1, *q, *r;
676 Byte *fn, cmd[BUFSIZ], args[BUFSIZ];
677 int i, l, li, ch, st, b, e;
678 int useforce = FALSE, forced = FALSE;
681 // :3154 // if (-e line 3154) goto it else stay put
682 // :4,33w! foo // write a portion of buffer to file "foo"
683 // :w // write all of buffer to current file
685 // :q! // quit- dont care about modified file
686 // :'a,'z!sort -u // filter block through sort
687 // :'f // goto mark "f"
688 // :'fl // list literal the mark "f" line
689 // :.r bar // read file "bar" into buffer before dot
690 // :/123/,/abc/d // delete lines from "123" line to "abc" line
691 // :/xyz/ // goto the "xyz" line
692 // :s/find/replace/ // substitute pattern "find" with "replace"
693 // :!<cmd> // run <cmd> then return
696 if (strlen((char *) buf) <= 0)
699 buf++; // move past the ':'
701 li = st = ch = i = 0;
703 q = text; // assume 1,$ for the range
705 li = count_lines(text, end - 1);
706 fn = cfn; // default to current file
707 memset(cmd, '\0', BUFSIZ); // clear cmd[]
708 memset(args, '\0', BUFSIZ); // clear args[]
710 // look for optional address(es) :. :1 :1,9 :'q,'a :%
711 buf = get_address(buf, &b, &e);
713 // remember orig command line
716 // get the COMMAND into cmd[]
718 while (*buf != '\0') {
726 strcpy((char *) args, (char *) buf);
727 buf1 = last_char_is((char *)cmd, '!');
730 *buf1 = '\0'; // get rid of !
733 // if there is only one addr, then the addr
734 // is the line number of the single line the
735 // user wants. So, reset the end
736 // pointer to point at end of the "b" line
737 q = find_line(b); // what line is #b
742 // we were given two addrs. change the
743 // end pointer to the addr given by user.
744 r = find_line(e); // what line is #e
748 // ------------ now look for the command ------------
749 i = strlen((char *) cmd);
750 if (i == 0) { // :123CR goto line #123
752 dot = find_line(b); // what line is #b
755 } else if (strncmp((char *) cmd, "!", 1) == 0) { // run a cmd
756 // :!ls run the <cmd>
757 (void) alarm(0); // wait for input- no alarms
758 place_cursor(rows - 1, 0, FALSE); // go to Status line
759 clear_to_eol(); // clear the line
761 system(orig_buf+1); // run the cmd
763 Hit_Return(); // let user see results
764 (void) alarm(3); // done waiting for input
765 } else if (strncmp((char *) cmd, "=", i) == 0) { // where is the address
766 if (b < 0) { // no addr given- use defaults
767 b = e = count_lines(text, dot);
770 } else if (strncasecmp((char *) cmd, "delete", i) == 0) { // delete lines
771 if (b < 0) { // no addr given- use defaults
772 q = begin_line(dot); // assume .,. for the range
775 dot = yank_delete(q, r, 1, YANKDEL); // save, then delete lines
777 } else if (strncasecmp((char *) cmd, "edit", i) == 0) { // Edit a file
780 // don't edit, if the current file has been modified
781 if (file_modified && ! useforce) {
782 psbs("No write since last change (:edit! overrides)");
785 if (strlen(args) > 0) {
786 // the user supplied a file name
788 } else if (cfn != 0 && strlen(cfn) > 0) {
789 // no user supplied name- use the current filename
793 // no user file name, no current name- punt
794 psbs("No current filename");
798 // see if file exists- if not, its just a new file request
799 if ((sr=stat((char*)fn, &st_buf)) < 0) {
800 // This is just a request for a new file creation.
801 // The file_insert below will fail but we get
802 // an empty buffer with a file name. Then the "write"
803 // command can do the create.
805 if ((st_buf.st_mode & (S_IFREG)) == 0) {
806 // This is not a regular file
807 psbs("\"%s\" is not a regular file", fn);
810 if ((st_buf.st_mode & (S_IRUSR | S_IRGRP | S_IROTH)) == 0) {
811 // dont have any read permissions
812 psbs("\"%s\" is not readable", fn);
817 // There is a read-able regular file
818 // make this the current file
819 q = (Byte *) bb_xstrdup((char *) fn); // save the cfn
820 free(cfn); // free the old name
821 cfn = q; // remember new cfn
824 // delete all the contents of text[]
825 new_text(2 * file_size(fn));
826 screenbegin = dot = end = text;
829 ch = file_insert(fn, text, file_size(fn));
832 // start empty buf with dummy line
833 (void) char_insert(text, '\n');
836 file_modified = FALSE;
837 #ifdef CONFIG_FEATURE_VI_YANKMARK
838 if (Ureg >= 0 && Ureg < 28 && reg[Ureg] != 0) {
839 free(reg[Ureg]); // free orig line reg- for 'U'
842 if (YDreg >= 0 && YDreg < 28 && reg[YDreg] != 0) {
843 free(reg[YDreg]); // free default yank/delete register
846 for (li = 0; li < 28; li++) {
849 #endif /* CONFIG_FEATURE_VI_YANKMARK */
850 // how many lines in text[]?
851 li = count_lines(text, end - 1);
853 #ifdef CONFIG_FEATURE_VI_READONLY
855 #endif /* CONFIG_FEATURE_VI_READONLY */
857 (sr < 0 ? " [New file]" : ""),
858 #ifdef CONFIG_FEATURE_VI_READONLY
859 ((vi_readonly || readonly) ? " [Read only]" : ""),
860 #endif /* CONFIG_FEATURE_VI_READONLY */
862 } else if (strncasecmp((char *) cmd, "file", i) == 0) { // what File is this
863 if (b != -1 || e != -1) {
864 ni((Byte *) "No address allowed on this command");
867 if (strlen((char *) args) > 0) {
868 // user wants a new filename
870 cfn = (Byte *) bb_xstrdup((char *) args);
872 // user wants file status info
875 } else if (strncasecmp((char *) cmd, "features", i) == 0) { // what features are available
876 // print out values of all features
877 place_cursor(rows - 1, 0, FALSE); // go to Status line, bottom of screen
878 clear_to_eol(); // clear the line
883 } else if (strncasecmp((char *) cmd, "list", i) == 0) { // literal print line
884 if (b < 0) { // no addr given- use defaults
885 q = begin_line(dot); // assume .,. for the range
888 place_cursor(rows - 1, 0, FALSE); // go to Status line, bottom of screen
889 clear_to_eol(); // clear the line
891 for (; q <= r; q++) {
895 c_is_no_print = c > 127 && !Isprint(c);
902 } else if (c < ' ' || c == 127) {
913 #ifdef CONFIG_FEATURE_VI_SET
915 #endif /* CONFIG_FEATURE_VI_SET */
917 } else if ((strncasecmp((char *) cmd, "quit", i) == 0) || // Quit
918 (strncasecmp((char *) cmd, "next", i) == 0)) { // edit next file
920 // force end of argv list
927 // don't exit if the file been modified
929 psbs("No write since last change (:%s! overrides)",
930 (*cmd == 'q' ? "quit" : "next"));
933 // are there other file to edit
934 if (*cmd == 'q' && optind < save_argc - 1) {
935 psbs("%d more file to edit", (save_argc - optind - 1));
938 if (*cmd == 'n' && optind >= save_argc - 1) {
939 psbs("No more files to edit");
943 } else if (strncasecmp((char *) cmd, "read", i) == 0) { // read file into text[]
945 if (strlen((char *) fn) <= 0) {
946 psbs("No filename given");
949 if (b < 0) { // no addr given- use defaults
950 q = begin_line(dot); // assume "dot"
952 // read after current line- unless user said ":0r foo"
955 #ifdef CONFIG_FEATURE_VI_READONLY
956 l= readonly; // remember current files' status
958 ch = file_insert(fn, q, file_size(fn));
959 #ifdef CONFIG_FEATURE_VI_READONLY
963 goto vc1; // nothing was inserted
964 // how many lines in text[]?
965 li = count_lines(q, q + ch - 1);
967 #ifdef CONFIG_FEATURE_VI_READONLY
969 #endif /* CONFIG_FEATURE_VI_READONLY */
971 #ifdef CONFIG_FEATURE_VI_READONLY
972 ((vi_readonly || readonly) ? " [Read only]" : ""),
973 #endif /* CONFIG_FEATURE_VI_READONLY */
976 // if the insert is before "dot" then we need to update
979 file_modified = TRUE;
981 } else if (strncasecmp((char *) cmd, "rewind", i) == 0) { // rewind cmd line args
982 if (file_modified && ! useforce) {
983 psbs("No write since last change (:rewind! overrides)");
985 // reset the filenames to edit
986 optind = fn_start - 1;
989 #ifdef CONFIG_FEATURE_VI_SET
990 } else if (strncasecmp((char *) cmd, "set", i) == 0) { // set or clear features
991 i = 0; // offset into args
992 if (strlen((char *) args) == 0) {
993 // print out values of all options
994 place_cursor(rows - 1, 0, FALSE); // go to Status line, bottom of screen
995 clear_to_eol(); // clear the line
996 printf("----------------------------------------\r\n");
997 #ifdef CONFIG_FEATURE_VI_SETOPTS
1000 printf("autoindent ");
1006 printf("ignorecase ");
1009 printf("showmatch ");
1010 printf("tabstop=%d ", tabstop);
1011 #endif /* CONFIG_FEATURE_VI_SETOPTS */
1015 if (strncasecmp((char *) args, "no", 2) == 0)
1016 i = 2; // ":set noautoindent"
1017 #ifdef CONFIG_FEATURE_VI_SETOPTS
1018 setops(args, "autoindent ", i, "ai", VI_AUTOINDENT);
1019 setops(args, "flash ", i, "fl", VI_ERR_METHOD);
1020 setops(args, "ignorecase ", i, "ic", VI_IGNORECASE);
1021 setops(args, "showmatch ", i, "ic", VI_SHOWMATCH);
1022 if (strncasecmp((char *) args + i, "tabstop=%d ", 7) == 0) {
1023 sscanf(strchr((char *) args + i, '='), "=%d", &ch);
1024 if (ch > 0 && ch < columns - 1)
1027 #endif /* CONFIG_FEATURE_VI_SETOPTS */
1028 #endif /* CONFIG_FEATURE_VI_SET */
1029 #ifdef CONFIG_FEATURE_VI_SEARCH
1030 } else if (strncasecmp((char *) cmd, "s", 1) == 0) { // substitute a pattern with a replacement pattern
1034 // F points to the "find" pattern
1035 // R points to the "replace" pattern
1036 // replace the cmd line delimiters "/" with NULLs
1037 gflag = 0; // global replace flag
1038 c = orig_buf[1]; // what is the delimiter
1039 F = orig_buf + 2; // start of "find"
1040 R = (Byte *) strchr((char *) F, c); // middle delimiter
1041 if (!R) goto colon_s_fail;
1042 *R++ = '\0'; // terminate "find"
1043 buf1 = (Byte *) strchr((char *) R, c);
1044 if (!buf1) goto colon_s_fail;
1045 *buf1++ = '\0'; // terminate "replace"
1046 if (*buf1 == 'g') { // :s/foo/bar/g
1048 gflag++; // turn on gflag
1051 if (b < 0) { // maybe :s/foo/bar/
1052 q = begin_line(dot); // start with cur line
1053 b = count_lines(text, q); // cur line number
1056 e = b; // maybe :.s/foo/bar/
1057 for (i = b; i <= e; i++) { // so, :20,23 s \0 find \0 replace \0
1058 ls = q; // orig line start
1060 buf1 = char_search(q, F, FORWARD, LIMITED); // search cur line only for "find"
1062 // we found the "find" pattern- delete it
1063 (void) text_hole_delete(buf1, buf1 + strlen((char *) F) - 1);
1064 // inset the "replace" patern
1065 (void) string_insert(buf1, R); // insert the string
1066 // check for "global" :s/foo/bar/g
1068 if ((buf1 + strlen((char *) R)) < end_line(ls)) {
1069 q = buf1 + strlen((char *) R);
1070 goto vc4; // don't let q move past cur line
1076 #endif /* CONFIG_FEATURE_VI_SEARCH */
1077 } else if (strncasecmp((char *) cmd, "version", i) == 0) { // show software version
1078 psb("%s", vi_Version);
1079 } else if ((strncasecmp((char *) cmd, "write", i) == 0) || // write text to file
1080 (strncasecmp((char *) cmd, "wq", i) == 0) ||
1081 (strncasecmp((char *) cmd, "x", i) == 0)) {
1082 // is there a file name to write to?
1083 if (strlen((char *) args) > 0) {
1086 #ifdef CONFIG_FEATURE_VI_READONLY
1087 if ((vi_readonly || readonly) && ! useforce) {
1088 psbs("\"%s\" File is read only", fn);
1091 #endif /* CONFIG_FEATURE_VI_READONLY */
1092 // how many lines in text[]?
1093 li = count_lines(q, r);
1095 // see if file exists- if not, its just a new file request
1097 // if "fn" is not write-able, chmod u+w
1098 // sprintf(syscmd, "chmod u+w %s", fn);
1102 l = file_write(fn, q, r);
1103 if (useforce && forced) {
1105 // sprintf(syscmd, "chmod u-w %s", fn);
1109 psb("\"%s\" %dL, %dC", fn, li, l);
1110 if (q == text && r == end - 1 && l == ch)
1111 file_modified = FALSE;
1112 if ((cmd[0] == 'x' || cmd[1] == 'q') && l == ch) {
1115 #ifdef CONFIG_FEATURE_VI_READONLY
1117 #endif /* CONFIG_FEATURE_VI_READONLY */
1118 #ifdef CONFIG_FEATURE_VI_YANKMARK
1119 } else if (strncasecmp((char *) cmd, "yank", i) == 0) { // yank lines
1120 if (b < 0) { // no addr given- use defaults
1121 q = begin_line(dot); // assume .,. for the range
1124 text_yank(q, r, YDreg);
1125 li = count_lines(q, r);
1126 psb("Yank %d lines (%d chars) into [%c]",
1127 li, strlen((char *) reg[YDreg]), what_reg());
1128 #endif /* CONFIG_FEATURE_VI_YANKMARK */
1134 dot = bound_dot(dot); // make sure "dot" is valid
1136 #ifdef CONFIG_FEATURE_VI_SEARCH
1138 psb(":s expression missing delimiters");
1142 static void Hit_Return(void)
1146 standout_start(); // start reverse video
1147 write1("[Hit return to continue]");
1148 standout_end(); // end reverse video
1149 while ((c = get_one_char()) != '\n' && c != '\r') /*do nothing */
1151 redraw(TRUE); // force redraw all
1153 #endif /* CONFIG_FEATURE_VI_COLON */
1155 //----- Synchronize the cursor to Dot --------------------------
1156 static void sync_cursor(Byte * d, int *row, int *col)
1158 Byte *beg_cur, *end_cur; // begin and end of "d" line
1159 Byte *beg_scr, *end_scr; // begin and end of screen
1163 beg_cur = begin_line(d); // first char of cur line
1164 end_cur = end_line(d); // last char of cur line
1166 beg_scr = end_scr = screenbegin; // first char of screen
1167 end_scr = end_screen(); // last char of screen
1169 if (beg_cur < screenbegin) {
1170 // "d" is before top line on screen
1171 // how many lines do we have to move
1172 cnt = count_lines(beg_cur, screenbegin);
1174 screenbegin = beg_cur;
1175 if (cnt > (rows - 1) / 2) {
1176 // we moved too many lines. put "dot" in middle of screen
1177 for (cnt = 0; cnt < (rows - 1) / 2; cnt++) {
1178 screenbegin = prev_line(screenbegin);
1181 } else if (beg_cur > end_scr) {
1182 // "d" is after bottom line on screen
1183 // how many lines do we have to move
1184 cnt = count_lines(end_scr, beg_cur);
1185 if (cnt > (rows - 1) / 2)
1186 goto sc1; // too many lines
1187 for (ro = 0; ro < cnt - 1; ro++) {
1188 // move screen begin the same amount
1189 screenbegin = next_line(screenbegin);
1190 // now, move the end of screen
1191 end_scr = next_line(end_scr);
1192 end_scr = end_line(end_scr);
1195 // "d" is on screen- find out which row
1197 for (ro = 0; ro < rows - 1; ro++) { // drive "ro" to correct row
1203 // find out what col "d" is on
1205 do { // drive "co" to correct column
1206 if (*tp == '\n' || *tp == '\0')
1210 co += ((tabstop - 1) - (co % tabstop));
1211 } else if (*tp < ' ' || *tp == 127) {
1212 co++; // display as ^X, use 2 columns
1214 } while (tp++ < d && ++co);
1216 // "co" is the column where "dot" is.
1217 // The screen has "columns" columns.
1218 // The currently displayed columns are 0+offset -- columns+ofset
1219 // |-------------------------------------------------------------|
1221 // offset | |------- columns ----------------|
1223 // If "co" is already in this range then we do not have to adjust offset
1224 // but, we do have to subtract the "offset" bias from "co".
1225 // If "co" is outside this range then we have to change "offset".
1226 // If the first char of a line is a tab the cursor will try to stay
1227 // in column 7, but we have to set offset to 0.
1229 if (co < 0 + offset) {
1232 if (co >= columns + offset) {
1233 offset = co - columns + 1;
1235 // if the first char of the line is a tab, and "dot" is sitting on it
1236 // force offset to 0.
1237 if (d == beg_cur && *d == '\t') {
1246 //----- Text Movement Routines ---------------------------------
1247 static Byte *begin_line(Byte * p) // return pointer to first char cur line
1249 while (p > text && p[-1] != '\n')
1250 p--; // go to cur line B-o-l
1254 static Byte *end_line(Byte * p) // return pointer to NL of cur line line
1256 while (p < end - 1 && *p != '\n')
1257 p++; // go to cur line E-o-l
1261 static inline Byte *dollar_line(Byte * p) // return pointer to just before NL line
1263 while (p < end - 1 && *p != '\n')
1264 p++; // go to cur line E-o-l
1265 // Try to stay off of the Newline
1266 if (*p == '\n' && (p - begin_line(p)) > 0)
1271 static Byte *prev_line(Byte * p) // return pointer first char prev line
1273 p = begin_line(p); // goto begining of cur line
1274 if (p[-1] == '\n' && p > text)
1275 p--; // step to prev line
1276 p = begin_line(p); // goto begining of prev line
1280 static Byte *next_line(Byte * p) // return pointer first char next line
1283 if (*p == '\n' && p < end - 1)
1284 p++; // step to next line
1288 //----- Text Information Routines ------------------------------
1289 static Byte *end_screen(void)
1294 // find new bottom line
1296 for (cnt = 0; cnt < rows - 2; cnt++)
1302 static int count_lines(Byte * start, Byte * stop) // count line from start to stop
1307 if (stop < start) { // start and stop are backwards- reverse them
1313 stop = end_line(stop); // get to end of this line
1314 for (q = start; q <= stop && q <= end - 1; q++) {
1321 static Byte *find_line(int li) // find begining of line #li
1325 for (q = text; li > 1; li--) {
1331 //----- Dot Movement Routines ----------------------------------
1332 static void dot_left(void)
1334 if (dot > text && dot[-1] != '\n')
1338 static void dot_right(void)
1340 if (dot < end - 1 && *dot != '\n')
1344 static void dot_begin(void)
1346 dot = begin_line(dot); // return pointer to first char cur line
1349 static void dot_end(void)
1351 dot = end_line(dot); // return pointer to last char cur line
1354 static Byte *move_to_col(Byte * p, int l)
1361 if (*p == '\n' || *p == '\0')
1365 co += ((tabstop - 1) - (co % tabstop));
1366 } else if (*p < ' ' || *p == 127) {
1367 co++; // display as ^X, use 2 columns
1369 } while (++co <= l && p++ < end);
1373 static void dot_next(void)
1375 dot = next_line(dot);
1378 static void dot_prev(void)
1380 dot = prev_line(dot);
1383 static void dot_scroll(int cnt, int dir)
1387 for (; cnt > 0; cnt--) {
1390 // ctrl-Y scroll up one line
1391 screenbegin = prev_line(screenbegin);
1394 // ctrl-E scroll down one line
1395 screenbegin = next_line(screenbegin);
1398 // make sure "dot" stays on the screen so we dont scroll off
1399 if (dot < screenbegin)
1401 q = end_screen(); // find new bottom line
1403 dot = begin_line(q); // is dot is below bottom line?
1407 static void dot_skip_over_ws(void)
1410 while (isspace(*dot) && *dot != '\n' && dot < end - 1)
1414 static void dot_delete(void) // delete the char at 'dot'
1416 (void) text_hole_delete(dot, dot);
1419 static Byte *bound_dot(Byte * p) // make sure text[0] <= P < "end"
1421 if (p >= end && end > text) {
1423 indicate_error('1');
1427 indicate_error('2');
1432 //----- Helper Utility Routines --------------------------------
1434 //----------------------------------------------------------------
1435 //----- Char Routines --------------------------------------------
1436 /* Chars that are part of a word-
1437 * 0123456789_ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz
1438 * Chars that are Not part of a word (stoppers)
1439 * !"#$%&'()*+,-./:;<=>?@[\]^`{|}~
1440 * Chars that are WhiteSpace
1441 * TAB NEWLINE VT FF RETURN SPACE
1442 * DO NOT COUNT NEWLINE AS WHITESPACE
1445 static Byte *new_screen(int ro, int co)
1450 screensize = ro * co + 8;
1451 screen = (Byte *) xmalloc(screensize);
1452 // initialize the new screen. assume this will be a empty file.
1454 // non-existent text[] lines start with a tilde (~).
1455 for (li = 1; li < ro - 1; li++) {
1456 screen[(li * co) + 0] = '~';
1461 static Byte *new_text(int size)
1464 size = 10240; // have a minimum size for new files
1466 text = (Byte *) xmalloc(size + 8);
1467 memset(text, '\0', size); // clear new text[]
1468 //text += 4; // leave some room for "oops"
1469 textend = text + size - 1;
1470 //textend -= 4; // leave some root for "oops"
1474 #ifdef CONFIG_FEATURE_VI_SEARCH
1475 static int mycmp(Byte * s1, Byte * s2, int len)
1479 i = strncmp((char *) s1, (char *) s2, len);
1480 #ifdef CONFIG_FEATURE_VI_SETOPTS
1482 i = strncasecmp((char *) s1, (char *) s2, len);
1484 #endif /* CONFIG_FEATURE_VI_SETOPTS */
1488 static Byte *char_search(Byte * p, Byte * pat, int dir, int range) // search for pattern starting at p
1490 #ifndef REGEX_SEARCH
1494 len = strlen((char *) pat);
1495 if (dir == FORWARD) {
1496 stop = end - 1; // assume range is p - end-1
1497 if (range == LIMITED)
1498 stop = next_line(p); // range is to next line
1499 for (start = p; start < stop; start++) {
1500 if (mycmp(start, pat, len) == 0) {
1504 } else if (dir == BACK) {
1505 stop = text; // assume range is text - p
1506 if (range == LIMITED)
1507 stop = prev_line(p); // range is to prev line
1508 for (start = p - len; start >= stop; start--) {
1509 if (mycmp(start, pat, len) == 0) {
1514 // pattern not found
1516 #else /*REGEX_SEARCH */
1518 struct re_pattern_buffer preg;
1522 re_syntax_options = RE_SYNTAX_POSIX_EXTENDED;
1528 // assume a LIMITED forward search
1536 // count the number of chars to search over, forward or backward
1540 // RANGE could be negative if we are searching backwards
1543 q = (char *) re_compile_pattern(pat, strlen((char *) pat), &preg);
1545 // The pattern was not compiled
1546 psbs("bad search pattern: \"%s\": %s", pat, q);
1547 i = 0; // return p if pattern not compiled
1557 // search for the compiled pattern, preg, in p[]
1558 // range < 0- search backward
1559 // range > 0- search forward
1561 // re_search() < 0 not found or error
1562 // re_search() > 0 index of found pattern
1563 // struct pattern char int int int struct reg
1564 // re_search (*pattern_buffer, *string, size, start, range, *regs)
1565 i = re_search(&preg, q, size, 0, range, 0);
1568 i = 0; // return NULL if pattern not found
1571 if (dir == FORWARD) {
1577 #endif /*REGEX_SEARCH */
1579 #endif /* CONFIG_FEATURE_VI_SEARCH */
1581 static Byte *char_insert(Byte * p, Byte c) // insert the char c at 'p'
1583 if (c == 22) { // Is this an ctrl-V?
1584 p = stupid_insert(p, '^'); // use ^ to indicate literal next
1585 p--; // backup onto ^
1586 refresh(FALSE); // show the ^
1590 file_modified = TRUE; // has the file been modified
1591 } else if (c == 27) { // Is this an ESC?
1594 end_cmd_q(); // stop adding to q
1595 strcpy((char *) status_buffer, " "); // clear the status buffer
1596 if ((p[-1] != '\n') && (dot>text)) {
1599 } else if (c == erase_char) { // Is this a BS
1601 if ((p[-1] != '\n') && (dot>text)) {
1603 p = text_hole_delete(p, p); // shrink buffer 1 char
1604 #ifdef CONFIG_FEATURE_VI_DOT_CMD
1605 // also rmove char from last_modifying_cmd
1606 if (last_modifying_cmd != 0 && strlen((char *) last_modifying_cmd) > 0) {
1609 q = last_modifying_cmd;
1610 q[strlen((char *) q) - 1] = '\0'; // erase BS
1611 q[strlen((char *) q) - 1] = '\0'; // erase prev char
1613 #endif /* CONFIG_FEATURE_VI_DOT_CMD */
1616 // insert a char into text[]
1617 Byte *sp; // "save p"
1620 c = '\n'; // translate \r to \n
1621 sp = p; // remember addr of insert
1622 p = stupid_insert(p, c); // insert the char
1623 #ifdef CONFIG_FEATURE_VI_SETOPTS
1624 if (showmatch && strchr(")]}", *sp) != NULL) {
1627 if (autoindent && c == '\n') { // auto indent the new line
1630 q = prev_line(p); // use prev line as templet
1631 for (; isblnk(*q); q++) {
1632 p = stupid_insert(p, *q); // insert the char
1635 #endif /* CONFIG_FEATURE_VI_SETOPTS */
1640 static Byte *stupid_insert(Byte * p, Byte c) // stupidly insert the char c at 'p'
1642 p = text_hole_make(p, 1);
1645 file_modified = TRUE; // has the file been modified
1651 static Byte find_range(Byte ** start, Byte ** stop, Byte c)
1653 Byte *save_dot, *p, *q;
1659 if (strchr("cdy><", c)) {
1660 // these cmds operate on whole lines
1661 p = q = begin_line(p);
1662 for (cnt = 1; cnt < cmdcnt; cnt++) {
1666 } else if (strchr("^%$0bBeEft", c)) {
1667 // These cmds operate on char positions
1668 do_cmd(c); // execute movement cmd
1670 } else if (strchr("wW", c)) {
1671 do_cmd(c); // execute movement cmd
1672 // if we are at the next word's first char
1673 // step back one char
1674 // but check the possibilities when it is true
1675 if (dot > text && ((isspace(dot[-1]) && !isspace(dot[0]))
1676 || (ispunct(dot[-1]) && !ispunct(dot[0]))
1677 || (isalnum(dot[-1]) && !isalnum(dot[0]))))
1678 dot--; // move back off of next word
1679 if (dot > text && *dot == '\n')
1680 dot--; // stay off NL
1682 } else if (strchr("H-k{", c)) {
1683 // these operate on multi-lines backwards
1684 q = end_line(dot); // find NL
1685 do_cmd(c); // execute movement cmd
1688 } else if (strchr("L+j}\r\n", c)) {
1689 // these operate on multi-lines forwards
1690 p = begin_line(dot);
1691 do_cmd(c); // execute movement cmd
1692 dot_end(); // find NL
1695 c = 27; // error- return an ESC char
1708 static int st_test(Byte * p, int type, int dir, Byte * tested)
1718 if (type == S_BEFORE_WS) {
1720 test = ((!isspace(c)) || c == '\n');
1722 if (type == S_TO_WS) {
1724 test = ((!isspace(c)) || c == '\n');
1726 if (type == S_OVER_WS) {
1728 test = ((isspace(c)));
1730 if (type == S_END_PUNCT) {
1732 test = ((ispunct(c)));
1734 if (type == S_END_ALNUM) {
1736 test = ((isalnum(c)) || c == '_');
1742 static Byte *skip_thing(Byte * p, int linecnt, int dir, int type)
1746 while (st_test(p, type, dir, &c)) {
1747 // make sure we limit search to correct number of lines
1748 if (c == '\n' && --linecnt < 1)
1750 if (dir >= 0 && p >= end - 1)
1752 if (dir < 0 && p <= text)
1754 p += dir; // move to next char
1759 // find matching char of pair () [] {}
1760 static Byte *find_pair(Byte * p, Byte c)
1767 dir = 1; // assume forward
1791 for (q = p + dir; text <= q && q < end; q += dir) {
1792 // look for match, count levels of pairs (( ))
1794 level++; // increase pair levels
1796 level--; // reduce pair level
1798 break; // found matching pair
1801 q = NULL; // indicate no match
1805 #ifdef CONFIG_FEATURE_VI_SETOPTS
1806 // show the matching char of a pair, () [] {}
1807 static void showmatching(Byte * p)
1811 // we found half of a pair
1812 q = find_pair(p, *p); // get loc of matching char
1814 indicate_error('3'); // no matching char
1816 // "q" now points to matching pair
1817 save_dot = dot; // remember where we are
1818 dot = q; // go to new loc
1819 refresh(FALSE); // let the user see it
1820 (void) mysleep(40); // give user some time
1821 dot = save_dot; // go back to old loc
1825 #endif /* CONFIG_FEATURE_VI_SETOPTS */
1827 // open a hole in text[]
1828 static Byte *text_hole_make(Byte * p, int size) // at "p", make a 'size' byte hole
1837 cnt = end - src; // the rest of buffer
1838 if (memmove(dest, src, cnt) != dest) {
1839 psbs("can't create room for new characters");
1841 memset(p, ' ', size); // clear new hole
1842 end = end + size; // adjust the new END
1843 file_modified = TRUE; // has the file been modified
1848 // close a hole in text[]
1849 static Byte *text_hole_delete(Byte * p, Byte * q) // delete "p" thru "q", inclusive
1854 // move forwards, from beginning
1858 if (q < p) { // they are backward- swap them
1862 hole_size = q - p + 1;
1864 if (src < text || src > end)
1866 if (dest < text || dest >= end)
1869 goto thd_atend; // just delete the end of the buffer
1870 if (memmove(dest, src, cnt) != dest) {
1871 psbs("can't delete the character");
1874 end = end - hole_size; // adjust the new END
1876 dest = end - 1; // make sure dest in below end-1
1878 dest = end = text; // keep pointers valid
1879 file_modified = TRUE; // has the file been modified
1884 // copy text into register, then delete text.
1885 // if dist <= 0, do not include, or go past, a NewLine
1887 static Byte *yank_delete(Byte * start, Byte * stop, int dist, int yf)
1891 // make sure start <= stop
1893 // they are backwards, reverse them
1899 // we can not cross NL boundaries
1903 // dont go past a NewLine
1904 for (; p + 1 <= stop; p++) {
1906 stop = p; // "stop" just before NewLine
1912 #ifdef CONFIG_FEATURE_VI_YANKMARK
1913 text_yank(start, stop, YDreg);
1914 #endif /* CONFIG_FEATURE_VI_YANKMARK */
1915 if (yf == YANKDEL) {
1916 p = text_hole_delete(start, stop);
1921 static void show_help(void)
1923 puts("These features are available:"
1924 #ifdef CONFIG_FEATURE_VI_SEARCH
1925 "\n\tPattern searches with / and ?"
1926 #endif /* CONFIG_FEATURE_VI_SEARCH */
1927 #ifdef CONFIG_FEATURE_VI_DOT_CMD
1928 "\n\tLast command repeat with \'.\'"
1929 #endif /* CONFIG_FEATURE_VI_DOT_CMD */
1930 #ifdef CONFIG_FEATURE_VI_YANKMARK
1931 "\n\tLine marking with 'x"
1932 "\n\tNamed buffers with \"x"
1933 #endif /* CONFIG_FEATURE_VI_YANKMARK */
1934 #ifdef CONFIG_FEATURE_VI_READONLY
1935 "\n\tReadonly if vi is called as \"view\""
1936 "\n\tReadonly with -R command line arg"
1937 #endif /* CONFIG_FEATURE_VI_READONLY */
1938 #ifdef CONFIG_FEATURE_VI_SET
1939 "\n\tSome colon mode commands with \':\'"
1940 #endif /* CONFIG_FEATURE_VI_SET */
1941 #ifdef CONFIG_FEATURE_VI_SETOPTS
1942 "\n\tSettable options with \":set\""
1943 #endif /* CONFIG_FEATURE_VI_SETOPTS */
1944 #ifdef CONFIG_FEATURE_VI_USE_SIGNALS
1945 "\n\tSignal catching- ^C"
1946 "\n\tJob suspend and resume with ^Z"
1947 #endif /* CONFIG_FEATURE_VI_USE_SIGNALS */
1948 #ifdef CONFIG_FEATURE_VI_WIN_RESIZE
1949 "\n\tAdapt to window re-sizes"
1950 #endif /* CONFIG_FEATURE_VI_WIN_RESIZE */
1954 static inline void print_literal(Byte * buf, Byte * s) // copy s to buf, convert unprintable
1959 strcpy((char *) buf, ""); // init buf
1960 if (strlen((char *) s) <= 0)
1961 s = (Byte *) "(NULL)";
1962 for (; *s > '\0'; s++) {
1966 c_is_no_print = c > 127 && !Isprint(c);
1967 if (c_is_no_print) {
1968 strcat((char *) buf, SOn);
1971 if (c < ' ' || c == 127) {
1972 strcat((char *) buf, "^");
1979 strcat((char *) buf, (char *) b);
1981 strcat((char *) buf, SOs);
1983 strcat((char *) buf, "$");
1988 #ifdef CONFIG_FEATURE_VI_DOT_CMD
1989 static void start_new_cmd_q(Byte c)
1992 free(last_modifying_cmd);
1993 // get buffer for new cmd
1994 last_modifying_cmd = (Byte *) xmalloc(BUFSIZ);
1995 memset(last_modifying_cmd, '\0', BUFSIZ); // clear new cmd queue
1996 // if there is a current cmd count put it in the buffer first
1998 sprintf((char *) last_modifying_cmd, "%d", cmdcnt);
1999 // save char c onto queue
2000 last_modifying_cmd[strlen((char *) last_modifying_cmd)] = c;
2005 static void end_cmd_q(void)
2007 #ifdef CONFIG_FEATURE_VI_YANKMARK
2008 YDreg = 26; // go back to default Yank/Delete reg
2009 #endif /* CONFIG_FEATURE_VI_YANKMARK */
2013 #endif /* CONFIG_FEATURE_VI_DOT_CMD */
2015 #if defined(CONFIG_FEATURE_VI_YANKMARK) || defined(CONFIG_FEATURE_VI_COLON) || defined(CONFIG_FEATURE_VI_CRASHME)
2016 static Byte *string_insert(Byte * p, Byte * s) // insert the string at 'p'
2020 i = strlen((char *) s);
2021 p = text_hole_make(p, i);
2022 strncpy((char *) p, (char *) s, i);
2023 for (cnt = 0; *s != '\0'; s++) {
2027 #ifdef CONFIG_FEATURE_VI_YANKMARK
2028 psb("Put %d lines (%d chars) from [%c]", cnt, i, what_reg());
2029 #endif /* CONFIG_FEATURE_VI_YANKMARK */
2032 #endif /* CONFIG_FEATURE_VI_YANKMARK || CONFIG_FEATURE_VI_COLON || CONFIG_FEATURE_VI_CRASHME */
2034 #ifdef CONFIG_FEATURE_VI_YANKMARK
2035 static Byte *text_yank(Byte * p, Byte * q, int dest) // copy text into a register
2040 if (q < p) { // they are backwards- reverse them
2047 free(t); // if already a yank register, free it
2048 t = (Byte *) xmalloc(cnt + 1); // get a new register
2049 memset(t, '\0', cnt + 1); // clear new text[]
2050 strncpy((char *) t, (char *) p, cnt); // copy text[] into bufer
2055 static Byte what_reg(void)
2061 c = 'D'; // default to D-reg
2062 if (0 <= YDreg && YDreg <= 25)
2063 c = 'a' + (Byte) YDreg;
2071 static void check_context(Byte cmd)
2073 // A context is defined to be "modifying text"
2074 // Any modifying command establishes a new context.
2076 if (dot < context_start || dot > context_end) {
2077 if (strchr((char *) modifying_cmds, cmd) != NULL) {
2078 // we are trying to modify text[]- make this the current context
2079 mark[27] = mark[26]; // move cur to prev
2080 mark[26] = dot; // move local to cur
2081 context_start = prev_line(prev_line(dot));
2082 context_end = next_line(next_line(dot));
2083 //loiter= start_loiter= now;
2089 static inline Byte *swap_context(Byte * p) // goto new context for '' command make this the current context
2093 // the current context is in mark[26]
2094 // the previous context is in mark[27]
2095 // only swap context if other context is valid
2096 if (text <= mark[27] && mark[27] <= end - 1) {
2098 mark[27] = mark[26];
2100 p = mark[26]; // where we are going- previous context
2101 context_start = prev_line(prev_line(prev_line(p)));
2102 context_end = next_line(next_line(next_line(p)));
2106 #endif /* CONFIG_FEATURE_VI_YANKMARK */
2108 static int isblnk(Byte c) // is the char a blank or tab
2110 return (c == ' ' || c == '\t');
2113 //----- Set terminal attributes --------------------------------
2114 static void rawmode(void)
2116 tcgetattr(0, &term_orig);
2117 term_vi = term_orig;
2118 term_vi.c_lflag &= (~ICANON & ~ECHO); // leave ISIG ON- allow intr's
2119 term_vi.c_iflag &= (~IXON & ~ICRNL);
2120 term_vi.c_oflag &= (~ONLCR);
2121 term_vi.c_cc[VMIN] = 1;
2122 term_vi.c_cc[VTIME] = 0;
2123 erase_char = term_vi.c_cc[VERASE];
2124 tcsetattr(0, TCSANOW, &term_vi);
2127 static void cookmode(void)
2130 tcsetattr(0, TCSANOW, &term_orig);
2133 //----- Come here when we get a window resize signal ---------
2134 #ifdef CONFIG_FEATURE_VI_USE_SIGNALS
2135 static void winch_sig(int sig)
2137 signal(SIGWINCH, winch_sig);
2138 #ifdef CONFIG_FEATURE_VI_WIN_RESIZE
2140 #endif /* CONFIG_FEATURE_VI_WIN_RESIZE */
2141 new_screen(rows, columns); // get memory for virtual screen
2142 redraw(TRUE); // re-draw the screen
2145 //----- Come here when we get a continue signal -------------------
2146 static void cont_sig(int sig)
2148 rawmode(); // terminal to "raw"
2149 *status_buffer = '\0'; // clear the status buffer
2150 redraw(TRUE); // re-draw the screen
2152 signal(SIGTSTP, suspend_sig);
2153 signal(SIGCONT, SIG_DFL);
2154 kill(my_pid, SIGCONT);
2157 //----- Come here when we get a Suspend signal -------------------
2158 static void suspend_sig(int sig)
2160 place_cursor(rows - 1, 0, FALSE); // go to bottom of screen
2161 clear_to_eol(); // Erase to end of line
2162 cookmode(); // terminal to "cooked"
2164 signal(SIGCONT, cont_sig);
2165 signal(SIGTSTP, SIG_DFL);
2166 kill(my_pid, SIGTSTP);
2169 //----- Come here when we get a signal ---------------------------
2170 static void catch_sig(int sig)
2172 signal(SIGHUP, catch_sig);
2173 signal(SIGINT, catch_sig);
2174 signal(SIGTERM, catch_sig);
2175 signal(SIGALRM, catch_sig);
2177 longjmp(restart, sig);
2180 //----- Come here when we get a core dump signal -----------------
2181 static void core_sig(int sig)
2183 signal(SIGQUIT, core_sig);
2184 signal(SIGILL, core_sig);
2185 signal(SIGTRAP, core_sig);
2186 signal(SIGIOT, core_sig);
2187 signal(SIGABRT, core_sig);
2188 signal(SIGFPE, core_sig);
2189 signal(SIGBUS, core_sig);
2190 signal(SIGSEGV, core_sig);
2192 signal(SIGSYS, core_sig);
2195 if(sig) { // signaled
2196 dot = bound_dot(dot); // make sure "dot" is valid
2198 longjmp(restart, sig);
2201 #endif /* CONFIG_FEATURE_VI_USE_SIGNALS */
2203 static int mysleep(int hund) // sleep for 'h' 1/100 seconds
2205 // Don't hang- Wait 5/100 seconds- 1 Sec= 1000000
2210 tv.tv_usec = hund * 10000;
2211 select(1, &rfds, NULL, NULL, &tv);
2212 return (FD_ISSET(0, &rfds));
2215 static Byte readbuffer[BUFSIZ];
2216 static int readed_for_parse;
2218 //----- IO Routines --------------------------------------------
2219 static Byte readit(void) // read (maybe cursor) key from stdin
2228 static const struct esc_cmds esccmds[] = {
2229 {"OA", (Byte) VI_K_UP}, // cursor key Up
2230 {"OB", (Byte) VI_K_DOWN}, // cursor key Down
2231 {"OC", (Byte) VI_K_RIGHT}, // Cursor Key Right
2232 {"OD", (Byte) VI_K_LEFT}, // cursor key Left
2233 {"OH", (Byte) VI_K_HOME}, // Cursor Key Home
2234 {"OF", (Byte) VI_K_END}, // Cursor Key End
2235 {"[A", (Byte) VI_K_UP}, // cursor key Up
2236 {"[B", (Byte) VI_K_DOWN}, // cursor key Down
2237 {"[C", (Byte) VI_K_RIGHT}, // Cursor Key Right
2238 {"[D", (Byte) VI_K_LEFT}, // cursor key Left
2239 {"[H", (Byte) VI_K_HOME}, // Cursor Key Home
2240 {"[F", (Byte) VI_K_END}, // Cursor Key End
2241 {"[1~", (Byte) VI_K_HOME}, // Cursor Key Home
2242 {"[2~", (Byte) VI_K_INSERT}, // Cursor Key Insert
2243 {"[4~", (Byte) VI_K_END}, // Cursor Key End
2244 {"[5~", (Byte) VI_K_PAGEUP}, // Cursor Key Page Up
2245 {"[6~", (Byte) VI_K_PAGEDOWN}, // Cursor Key Page Down
2246 {"OP", (Byte) VI_K_FUN1}, // Function Key F1
2247 {"OQ", (Byte) VI_K_FUN2}, // Function Key F2
2248 {"OR", (Byte) VI_K_FUN3}, // Function Key F3
2249 {"OS", (Byte) VI_K_FUN4}, // Function Key F4
2250 {"[15~", (Byte) VI_K_FUN5}, // Function Key F5
2251 {"[17~", (Byte) VI_K_FUN6}, // Function Key F6
2252 {"[18~", (Byte) VI_K_FUN7}, // Function Key F7
2253 {"[19~", (Byte) VI_K_FUN8}, // Function Key F8
2254 {"[20~", (Byte) VI_K_FUN9}, // Function Key F9
2255 {"[21~", (Byte) VI_K_FUN10}, // Function Key F10
2256 {"[23~", (Byte) VI_K_FUN11}, // Function Key F11
2257 {"[24~", (Byte) VI_K_FUN12}, // Function Key F12
2258 {"[11~", (Byte) VI_K_FUN1}, // Function Key F1
2259 {"[12~", (Byte) VI_K_FUN2}, // Function Key F2
2260 {"[13~", (Byte) VI_K_FUN3}, // Function Key F3
2261 {"[14~", (Byte) VI_K_FUN4}, // Function Key F4
2264 #define ESCCMDS_COUNT (sizeof(esccmds)/sizeof(struct esc_cmds))
2266 (void) alarm(0); // turn alarm OFF while we wait for input
2268 n = readed_for_parse;
2269 // get input from User- are there already input chars in Q?
2272 // the Q is empty, wait for a typed char
2273 n = read(0, readbuffer, BUFSIZ - 1);
2276 goto ri0; // interrupted sys call
2279 if (errno == EFAULT)
2281 if (errno == EINVAL)
2289 if (readbuffer[0] == 27) {
2290 // This is an ESC char. Is this Esc sequence?
2291 // Could be bare Esc key. See if there are any
2292 // more chars to read after the ESC. This would
2293 // be a Function or Cursor Key sequence.
2297 tv.tv_usec = 50000; // Wait 5/100 seconds- 1 Sec=1000000
2299 // keep reading while there are input chars and room in buffer
2300 while (select(1, &rfds, NULL, NULL, &tv) > 0 && n <= (BUFSIZ - 5)) {
2301 // read the rest of the ESC string
2302 int r = read(0, (void *) (readbuffer + n), BUFSIZ - n);
2308 readed_for_parse = n;
2311 if(c == 27 && n > 1) {
2312 // Maybe cursor or function key?
2313 const struct esc_cmds *eindex;
2315 for (eindex = esccmds; eindex < &esccmds[ESCCMDS_COUNT]; eindex++) {
2316 int cnt = strlen(eindex->seq);
2320 if(strncmp(eindex->seq, (char *) readbuffer + 1, cnt))
2322 // is a Cursor key- put derived value back into Q
2324 // for squeeze out the ESC sequence
2328 if(eindex == &esccmds[ESCCMDS_COUNT]) {
2329 /* defined ESC sequence not found, set only one ESC */
2335 // remove key sequence from Q
2336 readed_for_parse -= n;
2337 memmove(readbuffer, readbuffer + n, BUFSIZ - n);
2338 (void) alarm(3); // we are done waiting for input, turn alarm ON
2342 //----- IO Routines --------------------------------------------
2343 static Byte get_one_char(void)
2347 #ifdef CONFIG_FEATURE_VI_DOT_CMD
2348 // ! adding2q && ioq == 0 read()
2349 // ! adding2q && ioq != 0 *ioq
2350 // adding2q *last_modifying_cmd= read()
2352 // we are not adding to the q.
2353 // but, we may be reading from a q
2355 // there is no current q, read from STDIN
2356 c = readit(); // get the users input
2358 // there is a queue to get chars from first
2361 // the end of the q, read from STDIN
2363 ioq_start = ioq = 0;
2364 c = readit(); // get the users input
2368 // adding STDIN chars to q
2369 c = readit(); // get the users input
2370 if (last_modifying_cmd != 0) {
2371 int len = strlen((char *) last_modifying_cmd);
2372 if (len + 1 >= BUFSIZ) {
2373 psbs("last_modifying_cmd overrun");
2375 // add new char to q
2376 last_modifying_cmd[len] = c;
2380 #else /* CONFIG_FEATURE_VI_DOT_CMD */
2381 c = readit(); // get the users input
2382 #endif /* CONFIG_FEATURE_VI_DOT_CMD */
2383 return (c); // return the char, where ever it came from
2386 static Byte *get_input_line(Byte * prompt) // get input line- use "status line"
2391 static Byte *obufp = NULL;
2393 strcpy((char *) buf, (char *) prompt);
2394 *status_buffer = '\0'; // clear the status buffer
2395 place_cursor(rows - 1, 0, FALSE); // go to Status line, bottom of screen
2396 clear_to_eol(); // clear the line
2397 write1(prompt); // write out the :, /, or ? prompt
2399 for (i = strlen((char *) buf); i < BUFSIZ;) {
2400 c = get_one_char(); // read user input
2401 if (c == '\n' || c == '\r' || c == 27)
2402 break; // is this end of input
2403 if (c == erase_char) { // user wants to erase prev char
2404 i--; // backup to prev char
2405 buf[i] = '\0'; // erase the char
2406 buf[i + 1] = '\0'; // null terminate buffer
2407 write1("\b \b"); // erase char on screen
2408 if (i <= 0) { // user backs up before b-o-l, exit
2412 buf[i] = c; // save char in buffer
2413 buf[i + 1] = '\0'; // make sure buffer is null terminated
2414 putchar(c); // echo the char back to user
2420 obufp = (Byte *) bb_xstrdup((char *) buf);
2424 static int file_size(const Byte * fn) // what is the byte size of "fn"
2429 if (fn == 0 || strlen(fn) <= 0)
2432 sr = stat((char *) fn, &st_buf); // see if file exists
2434 cnt = (int) st_buf.st_size;
2439 static int file_insert(Byte * fn, Byte * p, int size)
2444 #ifdef CONFIG_FEATURE_VI_READONLY
2446 #endif /* CONFIG_FEATURE_VI_READONLY */
2447 if (fn == 0 || strlen((char*) fn) <= 0) {
2448 psbs("No filename given");
2452 // OK- this is just a no-op
2457 psbs("Trying to insert a negative number (%d) of characters", size);
2460 if (p < text || p > end) {
2461 psbs("Trying to insert file outside of memory");
2465 // see if we can open the file
2466 #ifdef CONFIG_FEATURE_VI_READONLY
2467 if (vi_readonly) goto fi1; // do not try write-mode
2469 fd = open((char *) fn, O_RDWR); // assume read & write
2471 // could not open for writing- maybe file is read only
2472 #ifdef CONFIG_FEATURE_VI_READONLY
2475 fd = open((char *) fn, O_RDONLY); // try read-only
2477 psbs("\"%s\" %s", fn, "could not open file");
2480 #ifdef CONFIG_FEATURE_VI_READONLY
2481 // got the file- read-only
2483 #endif /* CONFIG_FEATURE_VI_READONLY */
2485 p = text_hole_make(p, size);
2486 cnt = read(fd, p, size);
2490 p = text_hole_delete(p, p + size - 1); // un-do buffer insert
2491 psbs("could not read file \"%s\"", fn);
2492 } else if (cnt < size) {
2493 // There was a partial read, shrink unused space text[]
2494 p = text_hole_delete(p + cnt, p + (size - cnt) - 1); // un-do buffer insert
2495 psbs("could not read all of file \"%s\"", fn);
2498 file_modified = TRUE;
2503 static int file_write(Byte * fn, Byte * first, Byte * last)
2505 int fd, cnt, charcnt;
2508 psbs("No current filename");
2512 // FIXIT- use the correct umask()
2513 fd = open((char *) fn, (O_WRONLY | O_CREAT | O_TRUNC), 0664);
2516 cnt = last - first + 1;
2517 charcnt = write(fd, first, cnt);
2518 if (charcnt == cnt) {
2520 //file_modified= FALSE; // the file has not been modified
2528 //----- Terminal Drawing ---------------------------------------
2529 // The terminal is made up of 'rows' line of 'columns' columns.
2530 // classically this would be 24 x 80.
2531 // screen coordinates
2537 // 23,0 ... 23,79 status line
2540 //----- Move the cursor to row x col (count from 0, not 1) -------
2541 static void place_cursor(int row, int col, int opti)
2545 #ifdef CONFIG_FEATURE_VI_OPTIMIZE_CURSOR
2548 // char cm3[BUFSIZ];
2550 #endif /* CONFIG_FEATURE_VI_OPTIMIZE_CURSOR */
2552 memset(cm1, '\0', BUFSIZ - 1); // clear the buffer
2554 if (row < 0) row = 0;
2555 if (row >= rows) row = rows - 1;
2556 if (col < 0) col = 0;
2557 if (col >= columns) col = columns - 1;
2559 //----- 1. Try the standard terminal ESC sequence
2560 sprintf((char *) cm1, CMrc, row + 1, col + 1);
2562 if (! opti) goto pc0;
2564 #ifdef CONFIG_FEATURE_VI_OPTIMIZE_CURSOR
2565 //----- find the minimum # of chars to move cursor -------------
2566 //----- 2. Try moving with discreet chars (Newline, [back]space, ...)
2567 memset(cm2, '\0', BUFSIZ - 1); // clear the buffer
2569 // move to the correct row
2570 while (row < Rrow) {
2571 // the cursor has to move up
2575 while (row > Rrow) {
2576 // the cursor has to move down
2577 strcat(cm2, CMdown);
2581 // now move to the correct column
2582 strcat(cm2, "\r"); // start at col 0
2583 // just send out orignal source char to get to correct place
2584 screenp = &screen[row * columns]; // start of screen line
2585 strncat(cm2, screenp, col);
2587 //----- 3. Try some other way of moving cursor
2588 //---------------------------------------------
2590 // pick the shortest cursor motion to send out
2592 if (strlen(cm2) < strlen(cm)) {
2594 } /* else if (strlen(cm3) < strlen(cm)) {
2597 #endif /* CONFIG_FEATURE_VI_OPTIMIZE_CURSOR */
2599 write1(cm); // move the cursor
2602 //----- Erase from cursor to end of line -----------------------
2603 static void clear_to_eol(void)
2605 write1(Ceol); // Erase from cursor to end of line
2608 //----- Erase from cursor to end of screen -----------------------
2609 static void clear_to_eos(void)
2611 write1(Ceos); // Erase from cursor to end of screen
2614 //----- Start standout mode ------------------------------------
2615 static void standout_start(void) // send "start reverse video" sequence
2617 write1(SOs); // Start reverse video mode
2620 //----- End standout mode --------------------------------------
2621 static void standout_end(void) // send "end reverse video" sequence
2623 write1(SOn); // End reverse video mode
2626 //----- Flash the screen --------------------------------------
2627 static void flash(int h)
2629 standout_start(); // send "start reverse video" sequence
2632 standout_end(); // send "end reverse video" sequence
2636 static void Indicate_Error(void)
2638 #ifdef CONFIG_FEATURE_VI_CRASHME
2640 return; // generate a random command
2641 #endif /* CONFIG_FEATURE_VI_CRASHME */
2643 write1(bell); // send out a bell character
2649 //----- Screen[] Routines --------------------------------------
2650 //----- Erase the Screen[] memory ------------------------------
2651 static void screen_erase(void)
2653 memset(screen, ' ', screensize); // clear new screen
2656 //----- Draw the status line at bottom of the screen -------------
2657 static void show_status_line(void)
2659 static int last_cksum;
2663 cnt = strlen((char *) status_buffer);
2664 for (cksum= l= 0; l < cnt; l++) { cksum += (int)(status_buffer[l]); }
2665 // don't write the status line unless it changes
2666 if (cnt > 0 && last_cksum != cksum) {
2667 last_cksum= cksum; // remember if we have seen this line
2668 place_cursor(rows - 1, 0, FALSE); // put cursor on status line
2669 write1(status_buffer);
2671 place_cursor(crow, ccol, FALSE); // put cursor back in correct place
2676 //----- format the status buffer, the bottom line of screen ------
2677 // print status buffer, with STANDOUT mode
2678 static void psbs(const char *format, ...)
2682 va_start(args, format);
2683 strcpy((char *) status_buffer, SOs); // Terminal standout mode on
2684 vsprintf((char *) status_buffer + strlen((char *) status_buffer), format,
2686 strcat((char *) status_buffer, SOn); // Terminal standout mode off
2692 // print status buffer
2693 static void psb(const char *format, ...)
2697 va_start(args, format);
2698 vsprintf((char *) status_buffer, format, args);
2703 static void ni(Byte * s) // display messages
2707 print_literal(buf, s);
2708 psbs("\'%s\' is not implemented", buf);
2711 static void edit_status(void) // show file status on status line
2713 int cur, tot, percent;
2715 cur = count_lines(text, dot);
2716 tot = count_lines(text, end - 1);
2717 // current line percent
2718 // ------------- ~~ ----------
2721 percent = (100 * cur) / tot;
2727 #ifdef CONFIG_FEATURE_VI_READONLY
2729 #endif /* CONFIG_FEATURE_VI_READONLY */
2730 "%s line %d of %d --%d%%--",
2731 (cfn != 0 ? (char *) cfn : "No file"),
2732 #ifdef CONFIG_FEATURE_VI_READONLY
2733 ((vi_readonly || readonly) ? " [Read only]" : ""),
2734 #endif /* CONFIG_FEATURE_VI_READONLY */
2735 (file_modified ? " [modified]" : ""),
2739 //----- Force refresh of all Lines -----------------------------
2740 static void redraw(int full_screen)
2742 place_cursor(0, 0, FALSE); // put cursor in correct place
2743 clear_to_eos(); // tel terminal to erase display
2744 screen_erase(); // erase the internal screen buffer
2745 refresh(full_screen); // this will redraw the entire display
2748 //----- Format a text[] line into a buffer ---------------------
2749 static void format_line(Byte *dest, Byte *src, int li)
2754 for (co= 0; co < MAX_SCR_COLS; co++) {
2755 c= ' '; // assume blank
2756 if (li > 0 && co == 0) {
2757 c = '~'; // not first line, assume Tilde
2759 // are there chars in text[] and have we gone past the end
2760 if (text < end && src < end) {
2765 if (c > 127 && !Isprint(c)) {
2768 if (c < ' ' || c == 127) {
2772 for (; (co % tabstop) != (tabstop - 1); co++) {
2780 c += '@'; // make it visible
2783 // the co++ is done here so that the column will
2784 // not be overwritten when we blank-out the rest of line
2791 //----- Refresh the changed screen lines -----------------------
2792 // Copy the source line from text[] into the buffer and note
2793 // if the current screenline is different from the new buffer.
2794 // If they differ then that line needs redrawing on the terminal.
2796 static void refresh(int full_screen)
2798 static int old_offset;
2800 Byte buf[MAX_SCR_COLS];
2801 Byte *tp, *sp; // pointer into text[] and screen[]
2802 #ifdef CONFIG_FEATURE_VI_OPTIMIZE_CURSOR
2803 int last_li= -2; // last line that changed- for optimizing cursor movement
2804 #endif /* CONFIG_FEATURE_VI_OPTIMIZE_CURSOR */
2806 #ifdef CONFIG_FEATURE_VI_WIN_RESIZE
2808 #endif /* CONFIG_FEATURE_VI_WIN_RESIZE */
2809 sync_cursor(dot, &crow, &ccol); // where cursor will be (on "dot")
2810 tp = screenbegin; // index into text[] of top line
2812 // compare text[] to screen[] and mark screen[] lines that need updating
2813 for (li = 0; li < rows - 1; li++) {
2814 int cs, ce; // column start & end
2815 memset(buf, ' ', MAX_SCR_COLS); // blank-out the buffer
2816 buf[MAX_SCR_COLS-1] = 0; // NULL terminate the buffer
2817 // format current text line into buf
2818 format_line(buf, tp, li);
2820 // skip to the end of the current text[] line
2821 while (tp < end && *tp++ != '\n') /*no-op*/ ;
2823 // see if there are any changes between vitual screen and buf
2824 changed = FALSE; // assume no change
2827 sp = &screen[li * columns]; // start of screen line
2829 // force re-draw of every single column from 0 - columns-1
2832 // compare newly formatted buffer with virtual screen
2833 // look forward for first difference between buf and screen
2834 for ( ; cs <= ce; cs++) {
2835 if (buf[cs + offset] != sp[cs]) {
2836 changed = TRUE; // mark for redraw
2841 // look backward for last difference between buf and screen
2842 for ( ; ce >= cs; ce--) {
2843 if (buf[ce + offset] != sp[ce]) {
2844 changed = TRUE; // mark for redraw
2848 // now, cs is index of first diff, and ce is index of last diff
2850 // if horz offset has changed, force a redraw
2851 if (offset != old_offset) {
2856 // make a sanity check of columns indexes
2858 if (ce > columns-1) ce= columns-1;
2859 if (cs > ce) { cs= 0; ce= columns-1; }
2860 // is there a change between vitual screen and buf
2862 // copy changed part of buffer to virtual screen
2863 memmove(sp+cs, buf+(cs+offset), ce-cs+1);
2865 // move cursor to column of first change
2866 if (offset != old_offset) {
2867 // opti_cur_move is still too stupid
2868 // to handle offsets correctly
2869 place_cursor(li, cs, FALSE);
2871 #ifdef CONFIG_FEATURE_VI_OPTIMIZE_CURSOR
2872 // if this just the next line
2873 // try to optimize cursor movement
2874 // otherwise, use standard ESC sequence
2875 place_cursor(li, cs, li == (last_li+1) ? TRUE : FALSE);
2877 #else /* CONFIG_FEATURE_VI_OPTIMIZE_CURSOR */
2878 place_cursor(li, cs, FALSE); // use standard ESC sequence
2879 #endif /* CONFIG_FEATURE_VI_OPTIMIZE_CURSOR */
2882 // write line out to terminal
2892 #ifdef CONFIG_FEATURE_VI_OPTIMIZE_CURSOR
2894 #endif /* CONFIG_FEATURE_VI_OPTIMIZE_CURSOR */
2898 #ifdef CONFIG_FEATURE_VI_OPTIMIZE_CURSOR
2899 place_cursor(crow, ccol, (crow == last_row) ? TRUE : FALSE);
2902 place_cursor(crow, ccol, FALSE);
2903 #endif /* CONFIG_FEATURE_VI_OPTIMIZE_CURSOR */
2905 if (offset != old_offset)
2906 old_offset = offset;
2909 //---------------------------------------------------------------------
2910 //----- the Ascii Chart -----------------------------------------------
2912 // 00 nul 01 soh 02 stx 03 etx 04 eot 05 enq 06 ack 07 bel
2913 // 08 bs 09 ht 0a nl 0b vt 0c np 0d cr 0e so 0f si
2914 // 10 dle 11 dc1 12 dc2 13 dc3 14 dc4 15 nak 16 syn 17 etb
2915 // 18 can 19 em 1a sub 1b esc 1c fs 1d gs 1e rs 1f us
2916 // 20 sp 21 ! 22 " 23 # 24 $ 25 % 26 & 27 '
2917 // 28 ( 29 ) 2a * 2b + 2c , 2d - 2e . 2f /
2918 // 30 0 31 1 32 2 33 3 34 4 35 5 36 6 37 7
2919 // 38 8 39 9 3a : 3b ; 3c < 3d = 3e > 3f ?
2920 // 40 @ 41 A 42 B 43 C 44 D 45 E 46 F 47 G
2921 // 48 H 49 I 4a J 4b K 4c L 4d M 4e N 4f O
2922 // 50 P 51 Q 52 R 53 S 54 T 55 U 56 V 57 W
2923 // 58 X 59 Y 5a Z 5b [ 5c \ 5d ] 5e ^ 5f _
2924 // 60 ` 61 a 62 b 63 c 64 d 65 e 66 f 67 g
2925 // 68 h 69 i 6a j 6b k 6c l 6d m 6e n 6f o
2926 // 70 p 71 q 72 r 73 s 74 t 75 u 76 v 77 w
2927 // 78 x 79 y 7a z 7b { 7c | 7d } 7e ~ 7f del
2928 //---------------------------------------------------------------------
2930 //----- Execute a Vi Command -----------------------------------
2931 static void do_cmd(Byte c)
2933 Byte c1, *p, *q, *msg, buf[9], *save_dot;
2934 int cnt, i, j, dir, yf;
2936 c1 = c; // quiet the compiler
2937 cnt = yf = dir = 0; // quiet the compiler
2938 p = q = save_dot = msg = buf; // quiet the compiler
2939 memset(buf, '\0', 9); // clear buf
2941 /* if this is a cursor key, skip these checks */
2954 if (cmd_mode == 2) {
2955 // flip-flop Insert/Replace mode
2956 if (c == VI_K_INSERT) goto dc_i;
2957 // we are 'R'eplacing the current *dot with new char
2959 // don't Replace past E-o-l
2960 cmd_mode = 1; // convert to insert
2962 if (1 <= c || Isprint(c)) {
2964 dot = yank_delete(dot, dot, 0, YANKDEL); // delete char
2965 dot = char_insert(dot, c); // insert new char
2970 if (cmd_mode == 1) {
2971 // hitting "Insert" twice means "R" replace mode
2972 if (c == VI_K_INSERT) goto dc5;
2973 // insert the char c at "dot"
2974 if (1 <= c || Isprint(c)) {
2975 dot = char_insert(dot, c);
2990 #ifdef CONFIG_FEATURE_VI_CRASHME
2991 case 0x14: // dc4 ctrl-T
2992 crashme = (crashme == 0) ? 1 : 0;
2994 #endif /* CONFIG_FEATURE_VI_CRASHME */
3023 //case 'u': // u- FIXME- there is no undo
3025 default: // unrecognised command
3034 end_cmd_q(); // stop adding to q
3035 case 0x00: // nul- ignore
3037 case 2: // ctrl-B scroll up full screen
3038 case VI_K_PAGEUP: // Cursor Key Page Up
3039 dot_scroll(rows - 2, -1);
3041 #ifdef CONFIG_FEATURE_VI_USE_SIGNALS
3042 case 0x03: // ctrl-C interrupt
3043 longjmp(restart, 1);
3045 case 26: // ctrl-Z suspend
3046 suspend_sig(SIGTSTP);
3048 #endif /* CONFIG_FEATURE_VI_USE_SIGNALS */
3049 case 4: // ctrl-D scroll down half screen
3050 dot_scroll((rows - 2) / 2, 1);
3052 case 5: // ctrl-E scroll down one line
3055 case 6: // ctrl-F scroll down full screen
3056 case VI_K_PAGEDOWN: // Cursor Key Page Down
3057 dot_scroll(rows - 2, 1);
3059 case 7: // ctrl-G show current status
3062 case 'h': // h- move left
3063 case VI_K_LEFT: // cursor key Left
3064 case 8: // ctrl-H- move left (This may be ERASE char)
3065 case 127: // DEL- move left (This may be ERASE char)
3071 case 10: // Newline ^J
3072 case 'j': // j- goto next line, same col
3073 case VI_K_DOWN: // cursor key Down
3077 dot_next(); // go to next B-o-l
3078 dot = move_to_col(dot, ccol + offset); // try stay in same col
3080 case 12: // ctrl-L force redraw whole screen
3081 case 18: // ctrl-R force redraw
3082 place_cursor(0, 0, FALSE); // put cursor in correct place
3083 clear_to_eos(); // tel terminal to erase display
3085 screen_erase(); // erase the internal screen buffer
3086 refresh(TRUE); // this will redraw the entire display
3088 case 13: // Carriage Return ^M
3089 case '+': // +- goto next line
3096 case 21: // ctrl-U scroll up half screen
3097 dot_scroll((rows - 2) / 2, -1);
3099 case 25: // ctrl-Y scroll up one line
3105 cmd_mode = 0; // stop insrting
3107 *status_buffer = '\0'; // clear status buffer
3109 case ' ': // move right
3110 case 'l': // move right
3111 case VI_K_RIGHT: // Cursor Key Right
3117 #ifdef CONFIG_FEATURE_VI_YANKMARK
3118 case '"': // "- name a register to use for Delete/Yank
3119 c1 = get_one_char();
3127 case '\'': // '- goto a specific mark
3128 c1 = get_one_char();
3134 if (text <= q && q < end) {
3136 dot_begin(); // go to B-o-l
3139 } else if (c1 == '\'') { // goto previous context
3140 dot = swap_context(dot); // swap current and previous context
3141 dot_begin(); // go to B-o-l
3147 case 'm': // m- Mark a line
3148 // this is really stupid. If there are any inserts or deletes
3149 // between text[0] and dot then this mark will not point to the
3150 // correct location! It could be off by many lines!
3151 // Well..., at least its quick and dirty.
3152 c1 = get_one_char();
3156 // remember the line
3157 mark[(int) c1] = dot;
3162 case 'P': // P- Put register before
3163 case 'p': // p- put register after
3166 psbs("Nothing in register %c", what_reg());
3169 // are we putting whole lines or strings
3170 if (strchr((char *) p, '\n') != NULL) {
3172 dot_begin(); // putting lines- Put above
3175 // are we putting after very last line?
3176 if (end_line(dot) == (end - 1)) {
3177 dot = end; // force dot to end of text[]
3179 dot_next(); // next line, then put before
3184 dot_right(); // move to right, can move to NL
3186 dot = string_insert(dot, p); // insert the string
3187 end_cmd_q(); // stop adding to q
3189 case 'U': // U- Undo; replace current line with original version
3190 if (reg[Ureg] != 0) {
3191 p = begin_line(dot);
3193 p = text_hole_delete(p, q); // delete cur line
3194 p = string_insert(p, reg[Ureg]); // insert orig line
3199 #endif /* CONFIG_FEATURE_VI_YANKMARK */
3200 case '$': // $- goto end of line
3201 case VI_K_END: // Cursor Key End
3205 dot = end_line(dot);
3207 case '%': // %- find matching char of pair () [] {}
3208 for (q = dot; q < end && *q != '\n'; q++) {
3209 if (strchr("()[]{}", *q) != NULL) {
3210 // we found half of a pair
3211 p = find_pair(q, *q);
3223 case 'f': // f- forward to a user specified char
3224 last_forward_char = get_one_char(); // get the search char
3226 // dont separate these two commands. 'f' depends on ';'
3228 //**** fall thru to ... 'i'
3229 case ';': // ;- look at rest of line for last forward char
3233 if (last_forward_char == 0) break;
3235 while (q < end - 1 && *q != '\n' && *q != last_forward_char) {
3238 if (*q == last_forward_char)
3241 case '-': // -- goto prev line
3248 #ifdef CONFIG_FEATURE_VI_DOT_CMD
3249 case '.': // .- repeat the last modifying command
3250 // Stuff the last_modifying_cmd back into stdin
3251 // and let it be re-executed.
3252 if (last_modifying_cmd != 0) {
3253 ioq = ioq_start = (Byte *) bb_xstrdup((char *) last_modifying_cmd);
3256 #endif /* CONFIG_FEATURE_VI_DOT_CMD */
3257 #ifdef CONFIG_FEATURE_VI_SEARCH
3258 case '?': // /- search for a pattern
3259 case '/': // /- search for a pattern
3262 q = get_input_line(buf); // get input line- use "status line"
3263 if (strlen((char *) q) == 1)
3264 goto dc3; // if no pat re-use old pat
3265 if (strlen((char *) q) > 1) { // new pat- save it and find
3266 // there is a new pat
3267 free(last_search_pattern);
3268 last_search_pattern = (Byte *) bb_xstrdup((char *) q);
3269 goto dc3; // now find the pattern
3271 // user changed mind and erased the "/"- do nothing
3273 case 'N': // N- backward search for last pattern
3277 dir = BACK; // assume BACKWARD search
3279 if (last_search_pattern[0] == '?') {
3283 goto dc4; // now search for pattern
3285 case 'n': // n- repeat search for last pattern
3286 // search rest of text[] starting at next char
3287 // if search fails return orignal "p" not the "p+1" address
3292 if (last_search_pattern == 0) {
3293 msg = (Byte *) "No previous regular expression";
3296 if (last_search_pattern[0] == '/') {
3297 dir = FORWARD; // assume FORWARD search
3300 if (last_search_pattern[0] == '?') {
3305 q = char_search(p, last_search_pattern + 1, dir, FULL);
3307 dot = q; // good search, update "dot"
3311 // no pattern found between "dot" and "end"- continue at top
3316 q = char_search(p, last_search_pattern + 1, dir, FULL);
3317 if (q != NULL) { // found something
3318 dot = q; // found new pattern- goto it
3319 msg = (Byte *) "search hit BOTTOM, continuing at TOP";
3321 msg = (Byte *) "search hit TOP, continuing at BOTTOM";
3324 msg = (Byte *) "Pattern not found";
3329 case '{': // {- move backward paragraph
3330 q = char_search(dot, (Byte *) "\n\n", BACK, FULL);
3331 if (q != NULL) { // found blank line
3332 dot = next_line(q); // move to next blank line
3335 case '}': // }- move forward paragraph
3336 q = char_search(dot, (Byte *) "\n\n", FORWARD, FULL);
3337 if (q != NULL) { // found blank line
3338 dot = next_line(q); // move to next blank line
3341 #endif /* CONFIG_FEATURE_VI_SEARCH */
3342 case '0': // 0- goto begining of line
3352 if (c == '0' && cmdcnt < 1) {
3353 dot_begin(); // this was a standalone zero
3355 cmdcnt = cmdcnt * 10 + (c - '0'); // this 0 is part of a number
3358 case ':': // :- the colon mode commands
3359 p = get_input_line((Byte *) ":"); // get input line- use "status line"
3360 #ifdef CONFIG_FEATURE_VI_COLON
3361 colon(p); // execute the command
3362 #else /* CONFIG_FEATURE_VI_COLON */
3364 p++; // move past the ':'
3365 cnt = strlen((char *) p);
3368 if (strncasecmp((char *) p, "quit", cnt) == 0 ||
3369 strncasecmp((char *) p, "q!", cnt) == 0) { // delete lines
3370 if (file_modified && p[1] != '!') {
3371 psbs("No write since last change (:quit! overrides)");
3375 } else if (strncasecmp((char *) p, "write", cnt) == 0 ||
3376 strncasecmp((char *) p, "wq", cnt) == 0 ||
3377 strncasecmp((char *) p, "x", cnt) == 0) {
3378 cnt = file_write(cfn, text, end - 1);
3379 file_modified = FALSE;
3380 psb("\"%s\" %dL, %dC", cfn, count_lines(text, end - 1), cnt);
3381 if (p[0] == 'x' || p[1] == 'q') {
3384 } else if (strncasecmp((char *) p, "file", cnt) == 0 ) {
3385 edit_status(); // show current file status
3386 } else if (sscanf((char *) p, "%d", &j) > 0) {
3387 dot = find_line(j); // go to line # j
3389 } else { // unrecognised cmd
3392 #endif /* CONFIG_FEATURE_VI_COLON */
3394 case '<': // <- Left shift something
3395 case '>': // >- Right shift something
3396 cnt = count_lines(text, dot); // remember what line we are on
3397 c1 = get_one_char(); // get the type of thing to delete
3398 find_range(&p, &q, c1);
3399 (void) yank_delete(p, q, 1, YANKONLY); // save copy before change
3402 i = count_lines(p, q); // # of lines we are shifting
3403 for ( ; i > 0; i--, p = next_line(p)) {
3405 // shift left- remove tab or 8 spaces
3407 // shrink buffer 1 char
3408 (void) text_hole_delete(p, p);
3409 } else if (*p == ' ') {
3410 // we should be calculating columns, not just SPACE
3411 for (j = 0; *p == ' ' && j < tabstop; j++) {
3412 (void) text_hole_delete(p, p);
3415 } else if (c == '>') {
3416 // shift right -- add tab or 8 spaces
3417 (void) char_insert(p, '\t');
3420 dot = find_line(cnt); // what line were we on
3422 end_cmd_q(); // stop adding to q
3424 case 'A': // A- append at e-o-l
3425 dot_end(); // go to e-o-l
3426 //**** fall thru to ... 'a'
3427 case 'a': // a- append after current char
3432 case 'B': // B- back a blank-delimited Word
3433 case 'E': // E- end of a blank-delimited word
3434 case 'W': // W- forward a blank-delimited word
3441 if (c == 'W' || isspace(dot[dir])) {
3442 dot = skip_thing(dot, 1, dir, S_TO_WS);
3443 dot = skip_thing(dot, 2, dir, S_OVER_WS);
3446 dot = skip_thing(dot, 1, dir, S_BEFORE_WS);
3448 case 'C': // C- Change to e-o-l
3449 case 'D': // D- delete to e-o-l
3451 dot = dollar_line(dot); // move to before NL
3452 // copy text into a register and delete
3453 dot = yank_delete(save_dot, dot, 0, YANKDEL); // delete to e-o-l
3455 goto dc_i; // start inserting
3456 #ifdef CONFIG_FEATURE_VI_DOT_CMD
3458 end_cmd_q(); // stop adding to q
3459 #endif /* CONFIG_FEATURE_VI_DOT_CMD */
3461 case 'G': // G- goto to a line number (default= E-O-F)
3462 dot = end - 1; // assume E-O-F
3464 dot = find_line(cmdcnt); // what line is #cmdcnt
3468 case 'H': // H- goto top line on screen
3470 if (cmdcnt > (rows - 1)) {
3471 cmdcnt = (rows - 1);
3478 case 'I': // I- insert before first non-blank
3481 //**** fall thru to ... 'i'
3482 case 'i': // i- insert before current char
3483 case VI_K_INSERT: // Cursor Key Insert
3485 cmd_mode = 1; // start insrting
3486 psb("-- Insert --");
3488 case 'J': // J- join current and next lines together
3492 dot_end(); // move to NL
3493 if (dot < end - 1) { // make sure not last char in text[]
3494 *dot++ = ' '; // replace NL with space
3495 while (isblnk(*dot)) { // delete leading WS
3499 end_cmd_q(); // stop adding to q
3501 case 'L': // L- goto bottom line on screen
3503 if (cmdcnt > (rows - 1)) {
3504 cmdcnt = (rows - 1);
3512 case 'M': // M- goto middle line on screen
3514 for (cnt = 0; cnt < (rows-1) / 2; cnt++)
3515 dot = next_line(dot);
3517 case 'O': // O- open a empty line above
3519 p = begin_line(dot);
3520 if (p[-1] == '\n') {
3522 case 'o': // o- open a empty line below; Yes, I know it is in the middle of the "if (..."
3524 dot = char_insert(dot, '\n');
3527 dot = char_insert(dot, '\n'); // i\n ESC
3532 case 'R': // R- continuous Replace char
3535 psb("-- Replace --");
3537 case 'X': // X- delete char before dot
3538 case 'x': // x- delete the current char
3539 case 's': // s- substitute the current char
3546 if (dot[dir] != '\n') {
3548 dot--; // delete prev char
3549 dot = yank_delete(dot, dot, 0, YANKDEL); // delete char
3552 goto dc_i; // start insrting
3553 end_cmd_q(); // stop adding to q
3555 case 'Z': // Z- if modified, {write}; exit
3556 // ZZ means to save file (if necessary), then exit
3557 c1 = get_one_char();
3563 #ifdef CONFIG_FEATURE_VI_READONLY
3566 #endif /* CONFIG_FEATURE_VI_READONLY */
3568 cnt = file_write(cfn, text, end - 1);
3569 if (cnt == (end - 1 - text + 1)) {
3576 case '^': // ^- move to first non-blank on line
3580 case 'b': // b- back a word
3581 case 'e': // e- end of word
3588 if ((dot + dir) < text || (dot + dir) > end - 1)
3591 if (isspace(*dot)) {
3592 dot = skip_thing(dot, (c == 'e') ? 2 : 1, dir, S_OVER_WS);
3594 if (isalnum(*dot) || *dot == '_') {
3595 dot = skip_thing(dot, 1, dir, S_END_ALNUM);
3596 } else if (ispunct(*dot)) {
3597 dot = skip_thing(dot, 1, dir, S_END_PUNCT);
3600 case 'c': // c- change something
3601 case 'd': // d- delete something
3602 #ifdef CONFIG_FEATURE_VI_YANKMARK
3603 case 'y': // y- yank something
3604 case 'Y': // Y- Yank a line
3605 #endif /* CONFIG_FEATURE_VI_YANKMARK */
3606 yf = YANKDEL; // assume either "c" or "d"
3607 #ifdef CONFIG_FEATURE_VI_YANKMARK
3608 if (c == 'y' || c == 'Y')
3610 #endif /* CONFIG_FEATURE_VI_YANKMARK */
3613 c1 = get_one_char(); // get the type of thing to delete
3614 find_range(&p, &q, c1);
3615 if (c1 == 27) { // ESC- user changed mind and wants out
3616 c = c1 = 27; // Escape- do nothing
3617 } else if (strchr("wW", c1)) {
3619 // don't include trailing WS as part of word
3620 while (isblnk(*q)) {
3621 if (q <= text || q[-1] == '\n')
3626 dot = yank_delete(p, q, 0, yf); // delete word
3627 } else if (strchr("^0bBeEft$", c1)) {
3628 // single line copy text into a register and delete
3629 dot = yank_delete(p, q, 0, yf); // delete word
3630 } else if (strchr("cdykjHL%+-{}\r\n", c1)) {
3631 // multiple line copy text into a register and delete
3632 dot = yank_delete(p, q, 1, yf); // delete lines
3634 dot = char_insert(dot, '\n');
3635 // on the last line of file don't move to prev line
3636 if (dot != (end-1)) {
3639 } else if (c == 'd') {
3644 // could not recognize object
3645 c = c1 = 27; // error-
3649 // if CHANGING, not deleting, start inserting after the delete
3651 strcpy((char *) buf, "Change");
3652 goto dc_i; // start inserting
3655 strcpy((char *) buf, "Delete");
3657 #ifdef CONFIG_FEATURE_VI_YANKMARK
3658 if (c == 'y' || c == 'Y') {
3659 strcpy((char *) buf, "Yank");
3662 q = p + strlen((char *) p);
3663 for (cnt = 0; p <= q; p++) {
3667 psb("%s %d lines (%d chars) using [%c]",
3668 buf, cnt, strlen((char *) reg[YDreg]), what_reg());
3669 #endif /* CONFIG_FEATURE_VI_YANKMARK */
3670 end_cmd_q(); // stop adding to q
3673 case 'k': // k- goto prev line, same col
3674 case VI_K_UP: // cursor key Up
3679 dot = move_to_col(dot, ccol + offset); // try stay in same col
3681 case 'r': // r- replace the current char with user input
3682 c1 = get_one_char(); // get the replacement char
3685 file_modified = TRUE; // has the file been modified
3687 end_cmd_q(); // stop adding to q
3689 case 't': // t- move to char prior to next x
3690 last_forward_char = get_one_char();
3692 if (*dot == last_forward_char)
3694 last_forward_char= 0;
3696 case 'w': // w- forward a word
3700 if (isalnum(*dot) || *dot == '_') { // we are on ALNUM
3701 dot = skip_thing(dot, 1, FORWARD, S_END_ALNUM);
3702 } else if (ispunct(*dot)) { // we are on PUNCT
3703 dot = skip_thing(dot, 1, FORWARD, S_END_PUNCT);
3706 dot++; // move over word
3707 if (isspace(*dot)) {
3708 dot = skip_thing(dot, 2, FORWARD, S_OVER_WS);
3712 c1 = get_one_char(); // get the replacement char
3715 cnt = (rows - 2) / 2; // put dot at center
3717 cnt = rows - 2; // put dot at bottom
3718 screenbegin = begin_line(dot); // start dot at top
3719 dot_scroll(cnt, -1);
3721 case '|': // |- move to column "cmdcnt"
3722 dot = move_to_col(dot, cmdcnt - 1); // try to move to column
3724 case '~': // ~- flip the case of letters a-z -> A-Z
3728 if (islower(*dot)) {
3729 *dot = toupper(*dot);
3730 file_modified = TRUE; // has the file been modified
3731 } else if (isupper(*dot)) {
3732 *dot = tolower(*dot);
3733 file_modified = TRUE; // has the file been modified
3736 end_cmd_q(); // stop adding to q
3738 //----- The Cursor and Function Keys -----------------------------
3739 case VI_K_HOME: // Cursor Key Home
3742 // The Fn keys could point to do_macro which could translate them
3743 case VI_K_FUN1: // Function Key F1
3744 case VI_K_FUN2: // Function Key F2
3745 case VI_K_FUN3: // Function Key F3
3746 case VI_K_FUN4: // Function Key F4
3747 case VI_K_FUN5: // Function Key F5
3748 case VI_K_FUN6: // Function Key F6
3749 case VI_K_FUN7: // Function Key F7
3750 case VI_K_FUN8: // Function Key F8
3751 case VI_K_FUN9: // Function Key F9
3752 case VI_K_FUN10: // Function Key F10
3753 case VI_K_FUN11: // Function Key F11
3754 case VI_K_FUN12: // Function Key F12
3759 // if text[] just became empty, add back an empty line
3761 (void) char_insert(text, '\n'); // start empty buf with dummy line
3764 // it is OK for dot to exactly equal to end, otherwise check dot validity
3766 dot = bound_dot(dot); // make sure "dot" is valid
3768 #ifdef CONFIG_FEATURE_VI_YANKMARK
3769 check_context(c); // update the current context
3770 #endif /* CONFIG_FEATURE_VI_YANKMARK */
3773 cmdcnt = 0; // cmd was not a number, reset cmdcnt
3774 cnt = dot - begin_line(dot);
3775 // Try to stay off of the Newline
3776 if (*dot == '\n' && cnt > 0 && cmd_mode == 0)
3780 #ifdef CONFIG_FEATURE_VI_CRASHME
3781 static int totalcmds = 0;
3782 static int Mp = 85; // Movement command Probability
3783 static int Np = 90; // Non-movement command Probability
3784 static int Dp = 96; // Delete command Probability
3785 static int Ip = 97; // Insert command Probability
3786 static int Yp = 98; // Yank command Probability
3787 static int Pp = 99; // Put command Probability
3788 static int M = 0, N = 0, I = 0, D = 0, Y = 0, P = 0, U = 0;
3789 char chars[20] = "\t012345 abcdABCD-=.$";
3790 char *words[20] = { "this", "is", "a", "test",
3791 "broadcast", "the", "emergency", "of",
3792 "system", "quick", "brown", "fox",
3793 "jumped", "over", "lazy", "dogs",
3794 "back", "January", "Febuary", "March"
3797 "You should have received a copy of the GNU General Public License\n",
3798 "char c, cm, *cmd, *cmd1;\n",
3799 "generate a command by percentages\n",
3800 "Numbers may be typed as a prefix to some commands.\n",
3801 "Quit, discarding changes!\n",
3802 "Forced write, if permission originally not valid.\n",
3803 "In general, any ex or ed command (such as substitute or delete).\n",
3804 "I have tickets available for the Blazers vs LA Clippers for Monday, Janurary 1 at 1:00pm.\n",
3805 "Please get w/ me and I will go over it with you.\n",
3806 "The following is a list of scheduled, committed changes.\n",
3807 "1. Launch Norton Antivirus (Start, Programs, Norton Antivirus)\n",
3808 "Reminder....Town Meeting in Central Perk cafe today at 3:00pm.\n",
3809 "Any question about transactions please contact Sterling Huxley.\n",
3810 "I will try to get back to you by Friday, December 31.\n",
3811 "This Change will be implemented on Friday.\n",
3812 "Let me know if you have problems accessing this;\n",
3813 "Sterling Huxley recently added you to the access list.\n",
3814 "Would you like to go to lunch?\n",
3815 "The last command will be automatically run.\n",
3816 "This is too much english for a computer geek.\n",
3818 char *multilines[20] = {
3819 "You should have received a copy of the GNU General Public License\n",
3820 "char c, cm, *cmd, *cmd1;\n",
3821 "generate a command by percentages\n",
3822 "Numbers may be typed as a prefix to some commands.\n",
3823 "Quit, discarding changes!\n",
3824 "Forced write, if permission originally not valid.\n",
3825 "In general, any ex or ed command (such as substitute or delete).\n",
3826 "I have tickets available for the Blazers vs LA Clippers for Monday, Janurary 1 at 1:00pm.\n",
3827 "Please get w/ me and I will go over it with you.\n",
3828 "The following is a list of scheduled, committed changes.\n",
3829 "1. Launch Norton Antivirus (Start, Programs, Norton Antivirus)\n",
3830 "Reminder....Town Meeting in Central Perk cafe today at 3:00pm.\n",
3831 "Any question about transactions please contact Sterling Huxley.\n",
3832 "I will try to get back to you by Friday, December 31.\n",
3833 "This Change will be implemented on Friday.\n",
3834 "Let me know if you have problems accessing this;\n",
3835 "Sterling Huxley recently added you to the access list.\n",
3836 "Would you like to go to lunch?\n",
3837 "The last command will be automatically run.\n",
3838 "This is too much english for a computer geek.\n",
3841 // create a random command to execute
3842 static void crash_dummy()
3844 static int sleeptime; // how long to pause between commands
3845 char c, cm, *cmd, *cmd1;
3846 int i, cnt, thing, rbi, startrbi, percent;
3848 // "dot" movement commands
3849 cmd1 = " \n\r\002\004\005\006\025\0310^$-+wWeEbBhjklHL";
3851 // is there already a command running?
3852 if (readed_for_parse > 0)
3856 sleeptime = 0; // how long to pause between commands
3857 memset(readbuffer, '\0', BUFSIZ); // clear the read buffer
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((char *) readbuffer, words[(int) lrand48() % 20]);
3917 strcat((char *) readbuffer, " ");
3918 sleeptime = 0; // how fast to type
3919 } else if (thing == 2) { // insert lines
3920 strcat((char *) readbuffer, lines[(int) lrand48() % 20]);
3921 sleeptime = 0; // how fast to type
3922 } else { // insert multi-lines
3923 strcat((char *) readbuffer, multilines[(int) lrand48() % 20]);
3924 sleeptime = 0; // how fast to type
3927 strcat((char *) readbuffer, "\033");
3929 readed_for_parse = strlen(readbuffer);
3933 (void) 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;
3941 char d[2], msg[BUFSIZ];
3945 strcat((char *) msg, "end<text ");
3947 if (end > textend) {
3948 strcat((char *) msg, "end>textend ");
3951 strcat((char *) msg, "dot<text ");
3954 strcat((char *) msg, "dot>end ");
3956 if (screenbegin < text) {
3957 strcat((char *) msg, "screenbegin<text ");
3959 if (screenbegin > end - 1) {
3960 strcat((char *) msg, "screenbegin>end-1 ");
3963 if (strlen(msg) > 0) {
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 (read(0, d, 1) > 0) {
3969 if (d[0] == '\n' || d[0] == '\r')
3974 tim = (time_t) time((time_t *) 0);
3975 if (tim >= (oldtim + 3)) {
3976 sprintf((char *) status_buffer,
3977 "Tot=%d: M=%d N=%d I=%d D=%d Y=%d P=%d U=%d size=%d",
3978 totalcmds, M, N, I, D, Y, P, U, end - text + 1);
3983 #endif /* CONFIG_FEATURE_VI_CRASHME */