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 * Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
10 * To compile for standalone use:
11 * gcc -Wall -Os -s -DSTANDALONE -o vi vi.c
13 * gcc -Wall -Os -s -DSTANDALONE -DCONFIG_FEATURE_VI_CRASHME -o vi vi.c # include testing features
20 * $HOME/.exrc and ./.exrc
21 * add magic to search /foo.*bar
24 * how about mode lines: vi: set sw=8 ts=8:
25 * if mark[] values were line numbers rather than pointers
26 * it would be easier to change the mark when add/delete lines
27 * More intelligence in refresh()
28 * ":r !cmd" and "!cmd" to filter text through an external command
29 * A true "undo" facility
30 * An "ex" line oriented mode- maybe using "cmdedit"
33 //---- Feature -------------- Bytes to implement
36 #define CONFIG_FEATURE_VI_COLON // 4288
37 #define CONFIG_FEATURE_VI_YANKMARK // 1408
38 #define CONFIG_FEATURE_VI_SEARCH // 1088
39 #define CONFIG_FEATURE_VI_USE_SIGNALS // 1056
40 #define CONFIG_FEATURE_VI_DOT_CMD // 576
41 #define CONFIG_FEATURE_VI_READONLY // 128
42 #define CONFIG_FEATURE_VI_SETOPTS // 576
43 #define CONFIG_FEATURE_VI_SET // 224
44 #define CONFIG_FEATURE_VI_WIN_RESIZE // 256 WIN_RESIZE
45 // To test editor using CRASHME:
47 // To stop testing, wait until all to text[] is deleted, or
48 // Ctrl-Z and kill -9 %1
49 // while in the editor Ctrl-T will toggle the crashme function on and off.
50 //#define CONFIG_FEATURE_VI_CRASHME // randomly pick commands to execute
51 #endif /* STANDALONE */
59 #include <sys/ioctl.h>
60 #include <sys/types.h>
73 #define vi_Version BB_VER " " BB_BT
75 #define vi_Version "standalone"
76 #endif /* STANDALONE */
78 #ifdef CONFIG_LOCALE_SUPPORT
79 #define Isprint(c) isprint((c))
81 #define Isprint(c) ( (c) >= ' ' && (c) != 127 && (c) != ((unsigned char)'\233') )
86 #define FALSE ((int)0)
88 #define MAX_SCR_COLS BUFSIZ
90 // Misc. non-Ascii keys that report an escape sequence
91 #define VI_K_UP 128 // cursor key Up
92 #define VI_K_DOWN 129 // cursor key Down
93 #define VI_K_RIGHT 130 // Cursor Key Right
94 #define VI_K_LEFT 131 // cursor key Left
95 #define VI_K_HOME 132 // Cursor Key Home
96 #define VI_K_END 133 // Cursor Key End
97 #define VI_K_INSERT 134 // Cursor Key Insert
98 #define VI_K_PAGEUP 135 // Cursor Key Page Up
99 #define VI_K_PAGEDOWN 136 // Cursor Key Page Down
100 #define VI_K_FUN1 137 // Function Key F1
101 #define VI_K_FUN2 138 // Function Key F2
102 #define VI_K_FUN3 139 // Function Key F3
103 #define VI_K_FUN4 140 // Function Key F4
104 #define VI_K_FUN5 141 // Function Key F5
105 #define VI_K_FUN6 142 // Function Key F6
106 #define VI_K_FUN7 143 // Function Key F7
107 #define VI_K_FUN8 144 // Function Key F8
108 #define VI_K_FUN9 145 // Function Key F9
109 #define VI_K_FUN10 146 // Function Key F10
110 #define VI_K_FUN11 147 // Function Key F11
111 #define VI_K_FUN12 148 // Function Key F12
113 /* vt102 typical ESC sequence */
114 /* terminal standout start/normal ESC sequence */
115 static const char SOs[] = "\033[7m";
116 static const char SOn[] = "\033[0m";
117 /* terminal bell sequence */
118 static const char bell[] = "\007";
119 /* Clear-end-of-line and Clear-end-of-screen ESC sequence */
120 static const char Ceol[] = "\033[0K";
121 static const char Ceos [] = "\033[0J";
122 /* Cursor motion arbitrary destination ESC sequence */
123 static const char CMrc[] = "\033[%d;%dH";
124 /* Cursor motion up and down ESC sequence */
125 static const char CMup[] = "\033[A";
126 static const char CMdown[] = "\n";
132 FORWARD = 1, // code depends on "1" for array index
133 BACK = -1, // code depends on "-1" for array index
134 LIMITED = 0, // how much of text[] in char_search
135 FULL = 1, // how much of text[] in char_search
137 S_BEFORE_WS = 1, // used in skip_thing() for moving "dot"
138 S_TO_WS = 2, // used in skip_thing() for moving "dot"
139 S_OVER_WS = 3, // used in skip_thing() for moving "dot"
140 S_END_PUNCT = 4, // used in skip_thing() for moving "dot"
141 S_END_ALNUM = 5 // used in skip_thing() for moving "dot"
144 typedef unsigned char Byte;
146 static int vi_setops;
147 #define VI_AUTOINDENT 1
148 #define VI_SHOWMATCH 2
149 #define VI_IGNORECASE 4
150 #define VI_ERR_METHOD 8
151 #define autoindent (vi_setops & VI_AUTOINDENT)
152 #define showmatch (vi_setops & VI_SHOWMATCH )
153 #define ignorecase (vi_setops & VI_IGNORECASE)
154 /* indicate error with beep or flash */
155 #define err_method (vi_setops & VI_ERR_METHOD)
158 static int editing; // >0 while we are editing a file
159 static int cmd_mode; // 0=command 1=insert 2=replace
160 static int file_modified; // buffer contents changed
161 static int last_file_modified = -1;
162 static int fn_start; // index of first cmd line file name
163 static int save_argc; // how many file names on cmd line
164 static int cmdcnt; // repetition count
165 static fd_set rfds; // use select() for small sleeps
166 static struct timeval tv; // use select() for small sleeps
167 static int rows, columns; // the terminal screen is this size
168 static int crow, ccol, offset; // cursor is on Crow x Ccol with Horz Ofset
169 static Byte *status_buffer; // mesages to the user
170 #define STATUS_BUFFER_LEN 200
171 static int have_status_msg; // is default edit status needed?
172 static int last_status_cksum; // hash of current status line
173 static Byte *cfn; // previous, current, and next file name
174 static Byte *text, *end, *textend; // pointers to the user data in memory
175 static Byte *screen; // pointer to the virtual screen buffer
176 static int screensize; // and its size
177 static Byte *screenbegin; // index into text[], of top line on the screen
178 static Byte *dot; // where all the action takes place
180 static struct termios term_orig, term_vi; // remember what the cooked mode was
181 static Byte erase_char; // the users erase character
182 static Byte last_input_char; // last char read from user
183 static Byte last_forward_char; // last char searched for with 'f'
185 #ifdef CONFIG_FEATURE_VI_OPTIMIZE_CURSOR
186 static int last_row; // where the cursor was last moved to
187 #endif /* CONFIG_FEATURE_VI_OPTIMIZE_CURSOR */
188 #ifdef CONFIG_FEATURE_VI_USE_SIGNALS
189 static jmp_buf restart; // catch_sig()
190 #endif /* CONFIG_FEATURE_VI_USE_SIGNALS */
191 #if defined(CONFIG_FEATURE_VI_USE_SIGNALS) || defined(CONFIG_FEATURE_VI_CRASHME)
194 #ifdef CONFIG_FEATURE_VI_DOT_CMD
195 static int adding2q; // are we currently adding user input to q
196 static Byte *last_modifying_cmd; // last modifying cmd for "."
197 static Byte *ioq, *ioq_start; // pointer to string for get_one_char to "read"
198 #endif /* CONFIG_FEATURE_VI_DOT_CMD */
199 #if defined(CONFIG_FEATURE_VI_DOT_CMD) || defined(CONFIG_FEATURE_VI_YANKMARK)
200 static Byte *modifying_cmds; // cmds that modify text[]
201 #endif /* CONFIG_FEATURE_VI_DOT_CMD || CONFIG_FEATURE_VI_YANKMARK */
202 #ifdef CONFIG_FEATURE_VI_READONLY
203 static int vi_readonly, readonly;
204 #endif /* CONFIG_FEATURE_VI_READONLY */
205 #ifdef CONFIG_FEATURE_VI_YANKMARK
206 static Byte *reg[28]; // named register a-z, "D", and "U" 0-25,26,27
207 static int YDreg, Ureg; // default delete register and orig line for "U"
208 static Byte *mark[28]; // user marks points somewhere in text[]- a-z and previous context ''
209 static Byte *context_start, *context_end;
210 #endif /* CONFIG_FEATURE_VI_YANKMARK */
211 #ifdef CONFIG_FEATURE_VI_SEARCH
212 static Byte *last_search_pattern; // last pattern from a '/' or '?' search
213 #endif /* CONFIG_FEATURE_VI_SEARCH */
216 static void edit_file(Byte *); // edit one file
217 static void do_cmd(Byte); // execute a command
218 static void sync_cursor(Byte *, int *, int *); // synchronize the screen cursor to dot
219 static Byte *begin_line(Byte *); // return pointer to cur line B-o-l
220 static Byte *end_line(Byte *); // return pointer to cur line E-o-l
221 static Byte *prev_line(Byte *); // return pointer to prev line B-o-l
222 static Byte *next_line(Byte *); // return pointer to next line B-o-l
223 static Byte *end_screen(void); // get pointer to last char on screen
224 static int count_lines(Byte *, Byte *); // count line from start to stop
225 static Byte *find_line(int); // find begining of line #li
226 static Byte *move_to_col(Byte *, int); // move "p" to column l
227 static int isblnk(Byte); // is the char a blank or tab
228 static void dot_left(void); // move dot left- dont leave line
229 static void dot_right(void); // move dot right- dont leave line
230 static void dot_begin(void); // move dot to B-o-l
231 static void dot_end(void); // move dot to E-o-l
232 static void dot_next(void); // move dot to next line B-o-l
233 static void dot_prev(void); // move dot to prev line B-o-l
234 static void dot_scroll(int, int); // move the screen up or down
235 static void dot_skip_over_ws(void); // move dot pat WS
236 static void dot_delete(void); // delete the char at 'dot'
237 static Byte *bound_dot(Byte *); // make sure text[0] <= P < "end"
238 static Byte *new_screen(int, int); // malloc virtual screen memory
239 static Byte *new_text(int); // malloc memory for text[] buffer
240 static Byte *char_insert(Byte *, Byte); // insert the char c at 'p'
241 static Byte *stupid_insert(Byte *, Byte); // stupidly insert the char c at 'p'
242 static Byte find_range(Byte **, Byte **, Byte); // return pointers for an object
243 static int st_test(Byte *, int, int, Byte *); // helper for skip_thing()
244 static Byte *skip_thing(Byte *, int, int, int); // skip some object
245 static Byte *find_pair(Byte *, Byte); // find matching pair () [] {}
246 static Byte *text_hole_delete(Byte *, Byte *); // at "p", delete a 'size' byte hole
247 static Byte *text_hole_make(Byte *, int); // at "p", make a 'size' byte hole
248 static Byte *yank_delete(Byte *, Byte *, int, int); // yank text[] into register then delete
249 static void show_help(void); // display some help info
250 static void rawmode(void); // set "raw" mode on tty
251 static void cookmode(void); // return to "cooked" mode on tty
252 static int mysleep(int); // sleep for 'h' 1/100 seconds
253 static Byte readit(void); // read (maybe cursor) key from stdin
254 static Byte get_one_char(void); // read 1 char from stdin
255 static int file_size(const Byte *); // what is the byte size of "fn"
256 static int file_insert(Byte *, Byte *, int);
257 static int file_write(Byte *, Byte *, Byte *);
258 static void place_cursor(int, int, int);
259 static void screen_erase(void);
260 static void clear_to_eol(void);
261 static void clear_to_eos(void);
262 static void standout_start(void); // send "start reverse video" sequence
263 static void standout_end(void); // send "end reverse video" sequence
264 static void flash(int); // flash the terminal screen
265 static void show_status_line(void); // put a message on the bottom line
266 static void psb(const char *, ...); // Print Status Buf
267 static void psbs(const char *, ...); // Print Status Buf in standout mode
268 static void ni(Byte *); // display messages
269 static int format_edit_status(void); // format file status on status line
270 static void redraw(int); // force a full screen refresh
271 static void format_line(Byte*, Byte*, int);
272 static void refresh(int); // update the terminal from screen[]
274 static void Indicate_Error(void); // use flash or beep to indicate error
275 #define indicate_error(c) Indicate_Error()
276 static void Hit_Return(void);
278 #ifdef CONFIG_FEATURE_VI_SEARCH
279 static Byte *char_search(Byte *, Byte *, int, int); // search for pattern starting at p
280 static int mycmp(Byte *, Byte *, int); // string cmp based in "ignorecase"
281 #endif /* CONFIG_FEATURE_VI_SEARCH */
282 #ifdef CONFIG_FEATURE_VI_COLON
283 static Byte *get_one_address(Byte *, int *); // get colon addr, if present
284 static Byte *get_address(Byte *, int *, int *); // get two colon addrs, if present
285 static void colon(Byte *); // execute the "colon" mode cmds
286 #endif /* CONFIG_FEATURE_VI_COLON */
287 #ifdef CONFIG_FEATURE_VI_USE_SIGNALS
288 static void winch_sig(int); // catch window size changes
289 static void suspend_sig(int); // catch ctrl-Z
290 static void catch_sig(int); // catch ctrl-C and alarm time-outs
291 static void core_sig(int); // catch a core dump signal
292 #endif /* CONFIG_FEATURE_VI_USE_SIGNALS */
293 #ifdef CONFIG_FEATURE_VI_DOT_CMD
294 static void start_new_cmd_q(Byte); // new queue for command
295 static void end_cmd_q(void); // stop saving input chars
296 #else /* CONFIG_FEATURE_VI_DOT_CMD */
298 #endif /* CONFIG_FEATURE_VI_DOT_CMD */
299 #ifdef CONFIG_FEATURE_VI_WIN_RESIZE
300 static void window_size_get(int); // find out what size the window is
301 #endif /* CONFIG_FEATURE_VI_WIN_RESIZE */
302 #ifdef CONFIG_FEATURE_VI_SETOPTS
303 static void showmatching(Byte *); // show the matching pair () [] {}
304 #endif /* CONFIG_FEATURE_VI_SETOPTS */
305 #if defined(CONFIG_FEATURE_VI_YANKMARK) || defined(CONFIG_FEATURE_VI_SEARCH) || defined(CONFIG_FEATURE_VI_CRASHME)
306 static Byte *string_insert(Byte *, Byte *); // insert the string at 'p'
307 #endif /* CONFIG_FEATURE_VI_YANKMARK || CONFIG_FEATURE_VI_SEARCH || CONFIG_FEATURE_VI_CRASHME */
308 #ifdef CONFIG_FEATURE_VI_YANKMARK
309 static Byte *text_yank(Byte *, Byte *, int); // save copy of "p" into a register
310 static Byte what_reg(void); // what is letter of current YDreg
311 static void check_context(Byte); // remember context for '' command
312 #endif /* CONFIG_FEATURE_VI_YANKMARK */
313 #ifdef CONFIG_FEATURE_VI_CRASHME
314 static void crash_dummy();
315 static void crash_test();
316 static int crashme = 0;
317 #endif /* CONFIG_FEATURE_VI_CRASHME */
320 static void write1(const char *out)
325 int vi_main(int argc, char **argv)
328 RESERVE_CONFIG_BUFFER(STATUS_BUFFER, STATUS_BUFFER_LEN);
330 #ifdef CONFIG_FEATURE_VI_YANKMARK
332 #endif /* CONFIG_FEATURE_VI_YANKMARK */
333 #if defined(CONFIG_FEATURE_VI_USE_SIGNALS) || defined(CONFIG_FEATURE_VI_CRASHME)
336 #ifdef CONFIG_FEATURE_VI_CRASHME
337 (void) srand((long) my_pid);
338 #endif /* CONFIG_FEATURE_VI_CRASHME */
340 status_buffer = (Byte *)STATUS_BUFFER;
341 last_status_cksum = 0;
343 #ifdef CONFIG_FEATURE_VI_READONLY
344 vi_readonly = readonly = FALSE;
345 if (strncmp(argv[0], "view", 4) == 0) {
349 #endif /* CONFIG_FEATURE_VI_READONLY */
350 vi_setops = VI_AUTOINDENT | VI_SHOWMATCH | VI_IGNORECASE | VI_ERR_METHOD;
351 #ifdef CONFIG_FEATURE_VI_YANKMARK
352 for (i = 0; i < 28; i++) {
354 } // init the yank regs
355 #endif /* CONFIG_FEATURE_VI_YANKMARK */
356 #if defined(CONFIG_FEATURE_VI_DOT_CMD) || defined(CONFIG_FEATURE_VI_YANKMARK)
357 modifying_cmds = (Byte *) "aAcCdDiIJoOpPrRsxX<>~"; // cmds modifying text[]
358 #endif /* CONFIG_FEATURE_VI_DOT_CMD */
360 // 1- process $HOME/.exrc file
361 // 2- process EXINIT variable from environment
362 // 3- process command line args
363 while ((c = getopt(argc, argv, "hCR")) != -1) {
365 #ifdef CONFIG_FEATURE_VI_CRASHME
369 #endif /* CONFIG_FEATURE_VI_CRASHME */
370 #ifdef CONFIG_FEATURE_VI_READONLY
371 case 'R': // Read-only flag
375 #endif /* CONFIG_FEATURE_VI_READONLY */
376 //case 'r': // recover flag- ignore- we don't use tmp file
377 //case 'x': // encryption flag- ignore
378 //case 'c': // execute command first
379 //case 'h': // help -- just use default
386 // The argv array can be used by the ":next" and ":rewind" commands
388 fn_start = optind; // remember first file name for :next and :rew
391 //----- This is the main file handling loop --------------
392 if (optind >= argc) {
393 editing = 1; // 0= exit, 1= one file, 2= multiple files
396 for (; optind < argc; optind++) {
397 editing = 1; // 0=exit, 1=one file, 2+ =many files
399 cfn = (Byte *) bb_xstrdup(argv[optind]);
403 //-----------------------------------------------------------
408 #ifdef CONFIG_FEATURE_VI_WIN_RESIZE
409 //----- See what the window size currently is --------------------
410 static inline void window_size_get(int fd)
412 get_terminal_width_height(fd, &columns, &rows);
414 #endif /* CONFIG_FEATURE_VI_WIN_RESIZE */
416 static void edit_file(Byte * fn)
421 #ifdef CONFIG_FEATURE_VI_USE_SIGNALS
423 #endif /* CONFIG_FEATURE_VI_USE_SIGNALS */
424 #ifdef CONFIG_FEATURE_VI_YANKMARK
425 static Byte *cur_line;
426 #endif /* CONFIG_FEATURE_VI_YANKMARK */
432 #ifdef CONFIG_FEATURE_VI_WIN_RESIZE
434 #endif /* CONFIG_FEATURE_VI_WIN_RESIZE */
435 new_screen(rows, columns); // get memory for virtual screen
437 cnt = file_size(fn); // file size
438 size = 2 * cnt; // 200% of file size
439 new_text(size); // get a text[] buffer
440 screenbegin = dot = end = text;
442 ch= file_insert(fn, text, cnt);
445 (void) char_insert(text, '\n'); // start empty buf with dummy line
448 last_file_modified = -1;
449 #ifdef CONFIG_FEATURE_VI_YANKMARK
450 YDreg = 26; // default Yank/Delete reg
451 Ureg = 27; // hold orig line for "U" cmd
452 for (cnt = 0; cnt < 28; cnt++) {
455 mark[26] = mark[27] = text; // init "previous context"
456 #endif /* CONFIG_FEATURE_VI_YANKMARK */
458 last_forward_char = last_input_char = '\0';
462 #ifdef CONFIG_FEATURE_VI_USE_SIGNALS
465 signal(SIGWINCH, winch_sig);
466 signal(SIGTSTP, suspend_sig);
467 sig = setjmp(restart);
469 const char *msg = "";
472 msg = "(window resize)";
482 msg = "(I tried to touch invalid memory)";
486 psbs("-- caught signal %d %s--", sig, msg);
487 screenbegin = dot = text;
489 #endif /* CONFIG_FEATURE_VI_USE_SIGNALS */
492 cmd_mode = 0; // 0=command 1=insert 2='R'eplace
495 offset = 0; // no horizontal offset
497 #ifdef CONFIG_FEATURE_VI_DOT_CMD
498 free(last_modifying_cmd);
500 ioq = ioq_start = last_modifying_cmd = 0;
502 #endif /* CONFIG_FEATURE_VI_DOT_CMD */
503 redraw(FALSE); // dont force every col re-draw
506 //------This is the main Vi cmd handling loop -----------------------
507 while (editing > 0) {
508 #ifdef CONFIG_FEATURE_VI_CRASHME
510 if ((end - text) > 1) {
511 crash_dummy(); // generate a random command
515 string_insert(text, (Byte *) "\n\n##### Ran out of text to work on. #####\n\n"); // insert the string
519 #endif /* CONFIG_FEATURE_VI_CRASHME */
520 last_input_char = c = get_one_char(); // get a cmd from user
521 #ifdef CONFIG_FEATURE_VI_YANKMARK
522 // save a copy of the current line- for the 'U" command
523 if (begin_line(dot) != cur_line) {
524 cur_line = begin_line(dot);
525 text_yank(begin_line(dot), end_line(dot), Ureg);
527 #endif /* CONFIG_FEATURE_VI_YANKMARK */
528 #ifdef CONFIG_FEATURE_VI_DOT_CMD
529 // These are commands that change text[].
530 // Remember the input for the "." command
531 if (!adding2q && ioq_start == 0
532 && strchr((char *) modifying_cmds, c) != NULL) {
535 #endif /* CONFIG_FEATURE_VI_DOT_CMD */
536 do_cmd(c); // execute the user command
538 // poll to see if there is input already waiting. if we are
539 // not able to display output fast enough to keep up, skip
540 // the display update until we catch up with input.
541 if (mysleep(0) == 0) {
542 // no input pending- so update output
546 #ifdef CONFIG_FEATURE_VI_CRASHME
548 crash_test(); // test editor variables
549 #endif /* CONFIG_FEATURE_VI_CRASHME */
551 //-------------------------------------------------------------------
553 place_cursor(rows, 0, FALSE); // go to bottom of screen
554 clear_to_eol(); // Erase to end of line
558 //----- The Colon commands -------------------------------------
559 #ifdef CONFIG_FEATURE_VI_COLON
560 static Byte *get_one_address(Byte * p, int *addr) // get colon addr, if present
565 #ifdef CONFIG_FEATURE_VI_YANKMARK
567 #endif /* CONFIG_FEATURE_VI_YANKMARK */
568 #ifdef CONFIG_FEATURE_VI_SEARCH
569 Byte *pat, buf[BUFSIZ];
570 #endif /* CONFIG_FEATURE_VI_SEARCH */
572 *addr = -1; // assume no addr
573 if (*p == '.') { // the current line
576 *addr = count_lines(text, q);
577 #ifdef CONFIG_FEATURE_VI_YANKMARK
578 } else if (*p == '\'') { // is this a mark addr
582 if (c >= 'a' && c <= 'z') {
586 if (q != NULL) { // is mark valid
587 *addr = count_lines(text, q); // count lines
590 #endif /* CONFIG_FEATURE_VI_YANKMARK */
591 #ifdef CONFIG_FEATURE_VI_SEARCH
592 } else if (*p == '/') { // a search pattern
600 pat = (Byte *) bb_xstrdup((char *) buf); // save copy of pattern
603 q = char_search(dot, pat, FORWARD, FULL);
605 *addr = count_lines(text, q);
608 #endif /* CONFIG_FEATURE_VI_SEARCH */
609 } else if (*p == '$') { // the last line in file
611 q = begin_line(end - 1);
612 *addr = count_lines(text, q);
613 } else if (isdigit(*p)) { // specific line number
614 sscanf((char *) p, "%d%n", addr, &st);
616 } else { // I don't reconise this
617 // unrecognised address- assume -1
623 static Byte *get_address(Byte *p, int *b, int *e) // get two colon addrs, if present
625 //----- get the address' i.e., 1,3 'a,'b -----
626 // get FIRST addr, if present
628 p++; // skip over leading spaces
629 if (*p == '%') { // alias for 1,$
632 *e = count_lines(text, end-1);
635 p = get_one_address(p, b);
638 if (*p == ',') { // is there a address separator
642 // get SECOND addr, if present
643 p = get_one_address(p, e);
647 p++; // skip over trailing spaces
651 #ifdef CONFIG_FEATURE_VI_SETOPTS
652 static void setops(const Byte *args, const char *opname, int flg_no,
653 const char *short_opname, int opt)
655 const char *a = (char *) args + flg_no;
656 int l = strlen(opname) - 1; /* opname have + ' ' */
658 if (strncasecmp(a, opname, l) == 0 ||
659 strncasecmp(a, short_opname, 2) == 0) {
668 static void colon(Byte * buf)
670 Byte c, *orig_buf, *buf1, *q, *r;
671 Byte *fn, cmd[BUFSIZ], args[BUFSIZ];
672 int i, l, li, ch, st, b, e;
673 int useforce = FALSE, forced = FALSE;
676 // :3154 // if (-e line 3154) goto it else stay put
677 // :4,33w! foo // write a portion of buffer to file "foo"
678 // :w // write all of buffer to current file
680 // :q! // quit- dont care about modified file
681 // :'a,'z!sort -u // filter block through sort
682 // :'f // goto mark "f"
683 // :'fl // list literal the mark "f" line
684 // :.r bar // read file "bar" into buffer before dot
685 // :/123/,/abc/d // delete lines from "123" line to "abc" line
686 // :/xyz/ // goto the "xyz" line
687 // :s/find/replace/ // substitute pattern "find" with "replace"
688 // :!<cmd> // run <cmd> then return
691 if (strlen((char *) buf) <= 0)
694 buf++; // move past the ':'
696 li = st = ch = i = 0;
698 q = text; // assume 1,$ for the range
700 li = count_lines(text, end - 1);
701 fn = cfn; // default to current file
702 memset(cmd, '\0', BUFSIZ); // clear cmd[]
703 memset(args, '\0', BUFSIZ); // clear args[]
705 // look for optional address(es) :. :1 :1,9 :'q,'a :%
706 buf = get_address(buf, &b, &e);
708 // remember orig command line
711 // get the COMMAND into cmd[]
713 while (*buf != '\0') {
721 strcpy((char *) args, (char *) buf);
722 buf1 = (Byte*)last_char_is((char *)cmd, '!');
725 *buf1 = '\0'; // get rid of !
728 // if there is only one addr, then the addr
729 // is the line number of the single line the
730 // user wants. So, reset the end
731 // pointer to point at end of the "b" line
732 q = find_line(b); // what line is #b
737 // we were given two addrs. change the
738 // end pointer to the addr given by user.
739 r = find_line(e); // what line is #e
743 // ------------ now look for the command ------------
744 i = strlen((char *) cmd);
745 if (i == 0) { // :123CR goto line #123
747 dot = find_line(b); // what line is #b
750 } else if (strncmp((char *) cmd, "!", 1) == 0) { // run a cmd
751 // :!ls run the <cmd>
752 (void) alarm(0); // wait for input- no alarms
753 place_cursor(rows - 1, 0, FALSE); // go to Status line
754 clear_to_eol(); // clear the line
756 system((char*)(orig_buf+1)); // run the cmd
758 Hit_Return(); // let user see results
759 (void) alarm(3); // done waiting for input
760 } else if (strncmp((char *) cmd, "=", i) == 0) { // where is the address
761 if (b < 0) { // no addr given- use defaults
762 b = e = count_lines(text, dot);
765 } else if (strncasecmp((char *) cmd, "delete", i) == 0) { // delete lines
766 if (b < 0) { // no addr given- use defaults
767 q = begin_line(dot); // assume .,. for the range
770 dot = yank_delete(q, r, 1, YANKDEL); // save, then delete lines
772 } else if (strncasecmp((char *) cmd, "edit", i) == 0) { // Edit a file
775 // don't edit, if the current file has been modified
776 if (file_modified && ! useforce) {
777 psbs("No write since last change (:edit! overrides)");
780 if (strlen((char*)args) > 0) {
781 // the user supplied a file name
783 } else if (cfn != 0 && strlen((char*)cfn) > 0) {
784 // no user supplied name- use the current filename
788 // no user file name, no current name- punt
789 psbs("No current filename");
793 // see if file exists- if not, its just a new file request
794 if ((sr=stat((char*)fn, &st_buf)) < 0) {
795 // This is just a request for a new file creation.
796 // The file_insert below will fail but we get
797 // an empty buffer with a file name. Then the "write"
798 // command can do the create.
800 if ((st_buf.st_mode & (S_IFREG)) == 0) {
801 // This is not a regular file
802 psbs("\"%s\" is not a regular file", fn);
805 if ((st_buf.st_mode & (S_IRUSR | S_IRGRP | S_IROTH)) == 0) {
806 // dont have any read permissions
807 psbs("\"%s\" is not readable", fn);
812 // There is a read-able regular file
813 // make this the current file
814 q = (Byte *) bb_xstrdup((char *) fn); // save the cfn
815 free(cfn); // free the old name
816 cfn = q; // remember new cfn
819 // delete all the contents of text[]
820 new_text(2 * file_size(fn));
821 screenbegin = dot = end = text;
824 ch = file_insert(fn, text, file_size(fn));
827 // start empty buf with dummy line
828 (void) char_insert(text, '\n');
832 last_file_modified = -1;
833 #ifdef CONFIG_FEATURE_VI_YANKMARK
834 if (Ureg >= 0 && Ureg < 28 && reg[Ureg] != 0) {
835 free(reg[Ureg]); // free orig line reg- for 'U'
838 if (YDreg >= 0 && YDreg < 28 && reg[YDreg] != 0) {
839 free(reg[YDreg]); // free default yank/delete register
842 for (li = 0; li < 28; li++) {
845 #endif /* CONFIG_FEATURE_VI_YANKMARK */
846 // how many lines in text[]?
847 li = count_lines(text, end - 1);
849 #ifdef CONFIG_FEATURE_VI_READONLY
851 #endif /* CONFIG_FEATURE_VI_READONLY */
853 (sr < 0 ? " [New file]" : ""),
854 #ifdef CONFIG_FEATURE_VI_READONLY
855 ((vi_readonly || readonly) ? " [Read only]" : ""),
856 #endif /* CONFIG_FEATURE_VI_READONLY */
858 } else if (strncasecmp((char *) cmd, "file", i) == 0) { // what File is this
859 if (b != -1 || e != -1) {
860 ni((Byte *) "No address allowed on this command");
863 if (strlen((char *) args) > 0) {
864 // user wants a new filename
866 cfn = (Byte *) bb_xstrdup((char *) args);
868 // user wants file status info
869 last_status_cksum = 0; // force status update
871 } else if (strncasecmp((char *) cmd, "features", i) == 0) { // what features are available
872 // print out values of all features
873 place_cursor(rows - 1, 0, FALSE); // go to Status line, bottom of screen
874 clear_to_eol(); // clear the line
879 } else if (strncasecmp((char *) cmd, "list", i) == 0) { // literal print line
880 if (b < 0) { // no addr given- use defaults
881 q = begin_line(dot); // assume .,. for the range
884 place_cursor(rows - 1, 0, FALSE); // go to Status line, bottom of screen
885 clear_to_eol(); // clear the line
887 for (; q <= r; q++) {
891 c_is_no_print = c > 127 && !Isprint(c);
898 } else if (c < ' ' || c == 127) {
909 #ifdef CONFIG_FEATURE_VI_SET
911 #endif /* CONFIG_FEATURE_VI_SET */
913 } else if ((strncasecmp((char *) cmd, "quit", i) == 0) || // Quit
914 (strncasecmp((char *) cmd, "next", i) == 0)) { // edit next file
916 // force end of argv list
923 // don't exit if the file been modified
925 psbs("No write since last change (:%s! overrides)",
926 (*cmd == 'q' ? "quit" : "next"));
929 // are there other file to edit
930 if (*cmd == 'q' && optind < save_argc - 1) {
931 psbs("%d more file to edit", (save_argc - optind - 1));
934 if (*cmd == 'n' && optind >= save_argc - 1) {
935 psbs("No more files to edit");
939 } else if (strncasecmp((char *) cmd, "read", i) == 0) { // read file into text[]
941 if (strlen((char *) fn) <= 0) {
942 psbs("No filename given");
945 if (b < 0) { // no addr given- use defaults
946 q = begin_line(dot); // assume "dot"
948 // read after current line- unless user said ":0r foo"
951 #ifdef CONFIG_FEATURE_VI_READONLY
952 l= readonly; // remember current files' status
954 ch = file_insert(fn, q, file_size(fn));
955 #ifdef CONFIG_FEATURE_VI_READONLY
959 goto vc1; // nothing was inserted
960 // how many lines in text[]?
961 li = count_lines(q, q + ch - 1);
963 #ifdef CONFIG_FEATURE_VI_READONLY
965 #endif /* CONFIG_FEATURE_VI_READONLY */
967 #ifdef CONFIG_FEATURE_VI_READONLY
968 ((vi_readonly || readonly) ? " [Read only]" : ""),
969 #endif /* CONFIG_FEATURE_VI_READONLY */
972 // if the insert is before "dot" then we need to update
977 } else if (strncasecmp((char *) cmd, "rewind", i) == 0) { // rewind cmd line args
978 if (file_modified && ! useforce) {
979 psbs("No write since last change (:rewind! overrides)");
981 // reset the filenames to edit
982 optind = fn_start - 1;
985 #ifdef CONFIG_FEATURE_VI_SET
986 } else if (strncasecmp((char *) cmd, "set", i) == 0) { // set or clear features
987 i = 0; // offset into args
988 if (strlen((char *) args) == 0) {
989 // print out values of all options
990 place_cursor(rows - 1, 0, FALSE); // go to Status line, bottom of screen
991 clear_to_eol(); // clear the line
992 printf("----------------------------------------\r\n");
993 #ifdef CONFIG_FEATURE_VI_SETOPTS
996 printf("autoindent ");
1002 printf("ignorecase ");
1005 printf("showmatch ");
1006 printf("tabstop=%d ", tabstop);
1007 #endif /* CONFIG_FEATURE_VI_SETOPTS */
1011 if (strncasecmp((char *) args, "no", 2) == 0)
1012 i = 2; // ":set noautoindent"
1013 #ifdef CONFIG_FEATURE_VI_SETOPTS
1014 setops(args, "autoindent ", i, "ai", VI_AUTOINDENT);
1015 setops(args, "flash ", i, "fl", VI_ERR_METHOD);
1016 setops(args, "ignorecase ", i, "ic", VI_IGNORECASE);
1017 setops(args, "showmatch ", i, "ic", VI_SHOWMATCH);
1018 if (strncasecmp((char *) args + i, "tabstop=%d ", 7) == 0) {
1019 sscanf(strchr((char *) args + i, '='), "=%d", &ch);
1020 if (ch > 0 && ch < columns - 1)
1023 #endif /* CONFIG_FEATURE_VI_SETOPTS */
1024 #endif /* CONFIG_FEATURE_VI_SET */
1025 #ifdef CONFIG_FEATURE_VI_SEARCH
1026 } else if (strncasecmp((char *) cmd, "s", 1) == 0) { // substitute a pattern with a replacement pattern
1030 // F points to the "find" pattern
1031 // R points to the "replace" pattern
1032 // replace the cmd line delimiters "/" with NULLs
1033 gflag = 0; // global replace flag
1034 c = orig_buf[1]; // what is the delimiter
1035 F = orig_buf + 2; // start of "find"
1036 R = (Byte *) strchr((char *) F, c); // middle delimiter
1037 if (!R) goto colon_s_fail;
1038 *R++ = '\0'; // terminate "find"
1039 buf1 = (Byte *) strchr((char *) R, c);
1040 if (!buf1) goto colon_s_fail;
1041 *buf1++ = '\0'; // terminate "replace"
1042 if (*buf1 == 'g') { // :s/foo/bar/g
1044 gflag++; // turn on gflag
1047 if (b < 0) { // maybe :s/foo/bar/
1048 q = begin_line(dot); // start with cur line
1049 b = count_lines(text, q); // cur line number
1052 e = b; // maybe :.s/foo/bar/
1053 for (i = b; i <= e; i++) { // so, :20,23 s \0 find \0 replace \0
1054 ls = q; // orig line start
1056 buf1 = char_search(q, F, FORWARD, LIMITED); // search cur line only for "find"
1058 // we found the "find" pattern- delete it
1059 (void) text_hole_delete(buf1, buf1 + strlen((char *) F) - 1);
1060 // inset the "replace" patern
1061 (void) string_insert(buf1, R); // insert the string
1062 // check for "global" :s/foo/bar/g
1064 if ((buf1 + strlen((char *) R)) < end_line(ls)) {
1065 q = buf1 + strlen((char *) R);
1066 goto vc4; // don't let q move past cur line
1072 #endif /* CONFIG_FEATURE_VI_SEARCH */
1073 } else if (strncasecmp((char *) cmd, "version", i) == 0) { // show software version
1074 psb("%s", vi_Version);
1075 } else if (strncasecmp((char *) cmd, "write", i) == 0 // write text to file
1076 || strncasecmp((char *) cmd, "wq", i) == 0
1077 || strncasecmp((char *) cmd, "wn", i) == 0
1078 || strncasecmp((char *) cmd, "x", i) == 0) {
1079 // is there a file name to write to?
1080 if (strlen((char *) args) > 0) {
1083 #ifdef CONFIG_FEATURE_VI_READONLY
1084 if ((vi_readonly || readonly) && ! useforce) {
1085 psbs("\"%s\" File is read only", fn);
1088 #endif /* CONFIG_FEATURE_VI_READONLY */
1089 // how many lines in text[]?
1090 li = count_lines(q, r);
1092 // see if file exists- if not, its just a new file request
1094 // if "fn" is not write-able, chmod u+w
1095 // sprintf(syscmd, "chmod u+w %s", fn);
1099 l = file_write(fn, q, r);
1100 if (useforce && forced) {
1102 // sprintf(syscmd, "chmod u-w %s", fn);
1108 psbs("Write error: %s", strerror(errno));
1110 psb("\"%s\" %dL, %dC", fn, li, l);
1111 if (q == text && r == end - 1 && l == ch) {
1113 last_file_modified = -1;
1115 if ((cmd[0] == 'x' || cmd[1] == 'q' || cmd[1] == 'n' ||
1116 cmd[0] == 'X' || cmd[1] == 'Q' || cmd[1] == 'N')
1121 #ifdef CONFIG_FEATURE_VI_READONLY
1123 #endif /* CONFIG_FEATURE_VI_READONLY */
1124 #ifdef CONFIG_FEATURE_VI_YANKMARK
1125 } else if (strncasecmp((char *) cmd, "yank", i) == 0) { // yank lines
1126 if (b < 0) { // no addr given- use defaults
1127 q = begin_line(dot); // assume .,. for the range
1130 text_yank(q, r, YDreg);
1131 li = count_lines(q, r);
1132 psb("Yank %d lines (%d chars) into [%c]",
1133 li, strlen((char *) reg[YDreg]), what_reg());
1134 #endif /* CONFIG_FEATURE_VI_YANKMARK */
1140 dot = bound_dot(dot); // make sure "dot" is valid
1142 #ifdef CONFIG_FEATURE_VI_SEARCH
1144 psb(":s expression missing delimiters");
1148 #endif /* CONFIG_FEATURE_VI_COLON */
1150 static void Hit_Return(void)
1154 standout_start(); // start reverse video
1155 write1("[Hit return to continue]");
1156 standout_end(); // end reverse video
1157 while ((c = get_one_char()) != '\n' && c != '\r') /*do nothing */
1159 redraw(TRUE); // force redraw all
1162 //----- Synchronize the cursor to Dot --------------------------
1163 static void sync_cursor(Byte * d, int *row, int *col)
1165 Byte *beg_cur, *end_cur; // begin and end of "d" line
1166 Byte *beg_scr, *end_scr; // begin and end of screen
1170 beg_cur = begin_line(d); // first char of cur line
1171 end_cur = end_line(d); // last char of cur line
1173 beg_scr = end_scr = screenbegin; // first char of screen
1174 end_scr = end_screen(); // last char of screen
1176 if (beg_cur < screenbegin) {
1177 // "d" is before top line on screen
1178 // how many lines do we have to move
1179 cnt = count_lines(beg_cur, screenbegin);
1181 screenbegin = beg_cur;
1182 if (cnt > (rows - 1) / 2) {
1183 // we moved too many lines. put "dot" in middle of screen
1184 for (cnt = 0; cnt < (rows - 1) / 2; cnt++) {
1185 screenbegin = prev_line(screenbegin);
1188 } else if (beg_cur > end_scr) {
1189 // "d" is after bottom line on screen
1190 // how many lines do we have to move
1191 cnt = count_lines(end_scr, beg_cur);
1192 if (cnt > (rows - 1) / 2)
1193 goto sc1; // too many lines
1194 for (ro = 0; ro < cnt - 1; ro++) {
1195 // move screen begin the same amount
1196 screenbegin = next_line(screenbegin);
1197 // now, move the end of screen
1198 end_scr = next_line(end_scr);
1199 end_scr = end_line(end_scr);
1202 // "d" is on screen- find out which row
1204 for (ro = 0; ro < rows - 1; ro++) { // drive "ro" to correct row
1210 // find out what col "d" is on
1212 do { // drive "co" to correct column
1213 if (*tp == '\n' || *tp == '\0')
1217 co += ((tabstop - 1) - (co % tabstop));
1218 } else if (*tp < ' ' || *tp == 127) {
1219 co++; // display as ^X, use 2 columns
1221 } while (tp++ < d && ++co);
1223 // "co" is the column where "dot" is.
1224 // The screen has "columns" columns.
1225 // The currently displayed columns are 0+offset -- columns+ofset
1226 // |-------------------------------------------------------------|
1228 // offset | |------- columns ----------------|
1230 // If "co" is already in this range then we do not have to adjust offset
1231 // but, we do have to subtract the "offset" bias from "co".
1232 // If "co" is outside this range then we have to change "offset".
1233 // If the first char of a line is a tab the cursor will try to stay
1234 // in column 7, but we have to set offset to 0.
1236 if (co < 0 + offset) {
1239 if (co >= columns + offset) {
1240 offset = co - columns + 1;
1242 // if the first char of the line is a tab, and "dot" is sitting on it
1243 // force offset to 0.
1244 if (d == beg_cur && *d == '\t') {
1253 //----- Text Movement Routines ---------------------------------
1254 static Byte *begin_line(Byte * p) // return pointer to first char cur line
1256 while (p > text && p[-1] != '\n')
1257 p--; // go to cur line B-o-l
1261 static Byte *end_line(Byte * p) // return pointer to NL of cur line line
1263 while (p < end - 1 && *p != '\n')
1264 p++; // go to cur line E-o-l
1268 static inline Byte *dollar_line(Byte * p) // return pointer to just before NL line
1270 while (p < end - 1 && *p != '\n')
1271 p++; // go to cur line E-o-l
1272 // Try to stay off of the Newline
1273 if (*p == '\n' && (p - begin_line(p)) > 0)
1278 static Byte *prev_line(Byte * p) // return pointer first char prev line
1280 p = begin_line(p); // goto begining of cur line
1281 if (p[-1] == '\n' && p > text)
1282 p--; // step to prev line
1283 p = begin_line(p); // goto begining of prev line
1287 static Byte *next_line(Byte * p) // return pointer first char next line
1290 if (*p == '\n' && p < end - 1)
1291 p++; // step to next line
1295 //----- Text Information Routines ------------------------------
1296 static Byte *end_screen(void)
1301 // find new bottom line
1303 for (cnt = 0; cnt < rows - 2; cnt++)
1309 static int count_lines(Byte * start, Byte * stop) // count line from start to stop
1314 if (stop < start) { // start and stop are backwards- reverse them
1320 stop = end_line(stop); // get to end of this line
1321 for (q = start; q <= stop && q <= end - 1; q++) {
1328 static Byte *find_line(int li) // find begining of line #li
1332 for (q = text; li > 1; li--) {
1338 //----- Dot Movement Routines ----------------------------------
1339 static void dot_left(void)
1341 if (dot > text && dot[-1] != '\n')
1345 static void dot_right(void)
1347 if (dot < end - 1 && *dot != '\n')
1351 static void dot_begin(void)
1353 dot = begin_line(dot); // return pointer to first char cur line
1356 static void dot_end(void)
1358 dot = end_line(dot); // return pointer to last char cur line
1361 static Byte *move_to_col(Byte * p, int l)
1368 if (*p == '\n' || *p == '\0')
1372 co += ((tabstop - 1) - (co % tabstop));
1373 } else if (*p < ' ' || *p == 127) {
1374 co++; // display as ^X, use 2 columns
1376 } while (++co <= l && p++ < end);
1380 static void dot_next(void)
1382 dot = next_line(dot);
1385 static void dot_prev(void)
1387 dot = prev_line(dot);
1390 static void dot_scroll(int cnt, int dir)
1394 for (; cnt > 0; cnt--) {
1397 // ctrl-Y scroll up one line
1398 screenbegin = prev_line(screenbegin);
1401 // ctrl-E scroll down one line
1402 screenbegin = next_line(screenbegin);
1405 // make sure "dot" stays on the screen so we dont scroll off
1406 if (dot < screenbegin)
1408 q = end_screen(); // find new bottom line
1410 dot = begin_line(q); // is dot is below bottom line?
1414 static void dot_skip_over_ws(void)
1417 while (isspace(*dot) && *dot != '\n' && dot < end - 1)
1421 static void dot_delete(void) // delete the char at 'dot'
1423 (void) text_hole_delete(dot, dot);
1426 static Byte *bound_dot(Byte * p) // make sure text[0] <= P < "end"
1428 if (p >= end && end > text) {
1430 indicate_error('1');
1434 indicate_error('2');
1439 //----- Helper Utility Routines --------------------------------
1441 //----------------------------------------------------------------
1442 //----- Char Routines --------------------------------------------
1443 /* Chars that are part of a word-
1444 * 0123456789_ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz
1445 * Chars that are Not part of a word (stoppers)
1446 * !"#$%&'()*+,-./:;<=>?@[\]^`{|}~
1447 * Chars that are WhiteSpace
1448 * TAB NEWLINE VT FF RETURN SPACE
1449 * DO NOT COUNT NEWLINE AS WHITESPACE
1452 static Byte *new_screen(int ro, int co)
1457 screensize = ro * co + 8;
1458 screen = (Byte *) xmalloc(screensize);
1459 // initialize the new screen. assume this will be a empty file.
1461 // non-existent text[] lines start with a tilde (~).
1462 for (li = 1; li < ro - 1; li++) {
1463 screen[(li * co) + 0] = '~';
1468 static Byte *new_text(int size)
1471 size = 10240; // have a minimum size for new files
1473 text = (Byte *) xmalloc(size + 8);
1474 memset(text, '\0', size); // clear new text[]
1475 //text += 4; // leave some room for "oops"
1476 textend = text + size - 1;
1477 //textend -= 4; // leave some root for "oops"
1481 #ifdef CONFIG_FEATURE_VI_SEARCH
1482 static int mycmp(Byte * s1, Byte * s2, int len)
1486 i = strncmp((char *) s1, (char *) s2, len);
1487 #ifdef CONFIG_FEATURE_VI_SETOPTS
1489 i = strncasecmp((char *) s1, (char *) s2, len);
1491 #endif /* CONFIG_FEATURE_VI_SETOPTS */
1495 static Byte *char_search(Byte * p, Byte * pat, int dir, int range) // search for pattern starting at p
1497 #ifndef REGEX_SEARCH
1501 len = strlen((char *) pat);
1502 if (dir == FORWARD) {
1503 stop = end - 1; // assume range is p - end-1
1504 if (range == LIMITED)
1505 stop = next_line(p); // range is to next line
1506 for (start = p; start < stop; start++) {
1507 if (mycmp(start, pat, len) == 0) {
1511 } else if (dir == BACK) {
1512 stop = text; // assume range is text - p
1513 if (range == LIMITED)
1514 stop = prev_line(p); // range is to prev line
1515 for (start = p - len; start >= stop; start--) {
1516 if (mycmp(start, pat, len) == 0) {
1521 // pattern not found
1523 #else /*REGEX_SEARCH */
1525 struct re_pattern_buffer preg;
1529 re_syntax_options = RE_SYNTAX_POSIX_EXTENDED;
1535 // assume a LIMITED forward search
1543 // count the number of chars to search over, forward or backward
1547 // RANGE could be negative if we are searching backwards
1550 q = (char *) re_compile_pattern(pat, strlen((char *) pat), &preg);
1552 // The pattern was not compiled
1553 psbs("bad search pattern: \"%s\": %s", pat, q);
1554 i = 0; // return p if pattern not compiled
1564 // search for the compiled pattern, preg, in p[]
1565 // range < 0- search backward
1566 // range > 0- search forward
1568 // re_search() < 0 not found or error
1569 // re_search() > 0 index of found pattern
1570 // struct pattern char int int int struct reg
1571 // re_search (*pattern_buffer, *string, size, start, range, *regs)
1572 i = re_search(&preg, q, size, 0, range, 0);
1575 i = 0; // return NULL if pattern not found
1578 if (dir == FORWARD) {
1584 #endif /*REGEX_SEARCH */
1586 #endif /* CONFIG_FEATURE_VI_SEARCH */
1588 static Byte *char_insert(Byte * p, Byte c) // insert the char c at 'p'
1590 if (c == 22) { // Is this an ctrl-V?
1591 p = stupid_insert(p, '^'); // use ^ to indicate literal next
1592 p--; // backup onto ^
1593 refresh(FALSE); // show the ^
1597 file_modified++; // has the file been modified
1598 } else if (c == 27) { // Is this an ESC?
1601 end_cmd_q(); // stop adding to q
1602 last_status_cksum = 0; // force status update
1603 if ((p[-1] != '\n') && (dot>text)) {
1606 } else if (c == erase_char || c == 8 || c == 127) { // Is this a BS
1608 if ((p[-1] != '\n') && (dot>text)) {
1610 p = text_hole_delete(p, p); // shrink buffer 1 char
1613 // insert a char into text[]
1614 Byte *sp; // "save p"
1617 c = '\n'; // translate \r to \n
1618 sp = p; // remember addr of insert
1619 p = stupid_insert(p, c); // insert the char
1620 #ifdef CONFIG_FEATURE_VI_SETOPTS
1621 if (showmatch && strchr(")]}", *sp) != NULL) {
1624 if (autoindent && c == '\n') { // auto indent the new line
1627 q = prev_line(p); // use prev line as templet
1628 for (; isblnk(*q); q++) {
1629 p = stupid_insert(p, *q); // insert the char
1632 #endif /* CONFIG_FEATURE_VI_SETOPTS */
1637 static Byte *stupid_insert(Byte * p, Byte c) // stupidly insert the char c at 'p'
1639 p = text_hole_make(p, 1);
1642 file_modified++; // has the file been modified
1648 static Byte find_range(Byte ** start, Byte ** stop, Byte c)
1650 Byte *save_dot, *p, *q;
1656 if (strchr("cdy><", c)) {
1657 // these cmds operate on whole lines
1658 p = q = begin_line(p);
1659 for (cnt = 1; cnt < cmdcnt; cnt++) {
1663 } else if (strchr("^%$0bBeEft", c)) {
1664 // These cmds operate on char positions
1665 do_cmd(c); // execute movement cmd
1667 } else if (strchr("wW", c)) {
1668 do_cmd(c); // execute movement cmd
1669 // if we are at the next word's first char
1670 // step back one char
1671 // but check the possibilities when it is true
1672 if (dot > text && ((isspace(dot[-1]) && !isspace(dot[0]))
1673 || (ispunct(dot[-1]) && !ispunct(dot[0]))
1674 || (isalnum(dot[-1]) && !isalnum(dot[0]))))
1675 dot--; // move back off of next word
1676 if (dot > text && *dot == '\n')
1677 dot--; // stay off NL
1679 } else if (strchr("H-k{", c)) {
1680 // these operate on multi-lines backwards
1681 q = end_line(dot); // find NL
1682 do_cmd(c); // execute movement cmd
1685 } else if (strchr("L+j}\r\n", c)) {
1686 // these operate on multi-lines forwards
1687 p = begin_line(dot);
1688 do_cmd(c); // execute movement cmd
1689 dot_end(); // find NL
1692 c = 27; // error- return an ESC char
1705 static int st_test(Byte * p, int type, int dir, Byte * tested)
1715 if (type == S_BEFORE_WS) {
1717 test = ((!isspace(c)) || c == '\n');
1719 if (type == S_TO_WS) {
1721 test = ((!isspace(c)) || c == '\n');
1723 if (type == S_OVER_WS) {
1725 test = ((isspace(c)));
1727 if (type == S_END_PUNCT) {
1729 test = ((ispunct(c)));
1731 if (type == S_END_ALNUM) {
1733 test = ((isalnum(c)) || c == '_');
1739 static Byte *skip_thing(Byte * p, int linecnt, int dir, int type)
1743 while (st_test(p, type, dir, &c)) {
1744 // make sure we limit search to correct number of lines
1745 if (c == '\n' && --linecnt < 1)
1747 if (dir >= 0 && p >= end - 1)
1749 if (dir < 0 && p <= text)
1751 p += dir; // move to next char
1756 // find matching char of pair () [] {}
1757 static Byte *find_pair(Byte * p, Byte c)
1764 dir = 1; // assume forward
1788 for (q = p + dir; text <= q && q < end; q += dir) {
1789 // look for match, count levels of pairs (( ))
1791 level++; // increase pair levels
1793 level--; // reduce pair level
1795 break; // found matching pair
1798 q = NULL; // indicate no match
1802 #ifdef CONFIG_FEATURE_VI_SETOPTS
1803 // show the matching char of a pair, () [] {}
1804 static void showmatching(Byte * p)
1808 // we found half of a pair
1809 q = find_pair(p, *p); // get loc of matching char
1811 indicate_error('3'); // no matching char
1813 // "q" now points to matching pair
1814 save_dot = dot; // remember where we are
1815 dot = q; // go to new loc
1816 refresh(FALSE); // let the user see it
1817 (void) mysleep(40); // give user some time
1818 dot = save_dot; // go back to old loc
1822 #endif /* CONFIG_FEATURE_VI_SETOPTS */
1824 // open a hole in text[]
1825 static Byte *text_hole_make(Byte * p, int size) // at "p", make a 'size' byte hole
1834 cnt = end - src; // the rest of buffer
1835 if (memmove(dest, src, cnt) != dest) {
1836 psbs("can't create room for new characters");
1838 memset(p, ' ', size); // clear new hole
1839 end = end + size; // adjust the new END
1840 file_modified++; // has the file been modified
1845 // close a hole in text[]
1846 static Byte *text_hole_delete(Byte * p, Byte * q) // delete "p" thru "q", inclusive
1851 // move forwards, from beginning
1855 if (q < p) { // they are backward- swap them
1859 hole_size = q - p + 1;
1861 if (src < text || src > end)
1863 if (dest < text || dest >= end)
1866 goto thd_atend; // just delete the end of the buffer
1867 if (memmove(dest, src, cnt) != dest) {
1868 psbs("can't delete the character");
1871 end = end - hole_size; // adjust the new END
1873 dest = end - 1; // make sure dest in below end-1
1875 dest = end = text; // keep pointers valid
1876 file_modified++; // has the file been modified
1881 // copy text into register, then delete text.
1882 // if dist <= 0, do not include, or go past, a NewLine
1884 static Byte *yank_delete(Byte * start, Byte * stop, int dist, int yf)
1888 // make sure start <= stop
1890 // they are backwards, reverse them
1896 // we can not cross NL boundaries
1900 // dont go past a NewLine
1901 for (; p + 1 <= stop; p++) {
1903 stop = p; // "stop" just before NewLine
1909 #ifdef CONFIG_FEATURE_VI_YANKMARK
1910 text_yank(start, stop, YDreg);
1911 #endif /* CONFIG_FEATURE_VI_YANKMARK */
1912 if (yf == YANKDEL) {
1913 p = text_hole_delete(start, stop);
1918 static void show_help(void)
1920 puts("These features are available:"
1921 #ifdef CONFIG_FEATURE_VI_SEARCH
1922 "\n\tPattern searches with / and ?"
1923 #endif /* CONFIG_FEATURE_VI_SEARCH */
1924 #ifdef CONFIG_FEATURE_VI_DOT_CMD
1925 "\n\tLast command repeat with \'.\'"
1926 #endif /* CONFIG_FEATURE_VI_DOT_CMD */
1927 #ifdef CONFIG_FEATURE_VI_YANKMARK
1928 "\n\tLine marking with 'x"
1929 "\n\tNamed buffers with \"x"
1930 #endif /* CONFIG_FEATURE_VI_YANKMARK */
1931 #ifdef CONFIG_FEATURE_VI_READONLY
1932 "\n\tReadonly if vi is called as \"view\""
1933 "\n\tReadonly with -R command line arg"
1934 #endif /* CONFIG_FEATURE_VI_READONLY */
1935 #ifdef CONFIG_FEATURE_VI_SET
1936 "\n\tSome colon mode commands with \':\'"
1937 #endif /* CONFIG_FEATURE_VI_SET */
1938 #ifdef CONFIG_FEATURE_VI_SETOPTS
1939 "\n\tSettable options with \":set\""
1940 #endif /* CONFIG_FEATURE_VI_SETOPTS */
1941 #ifdef CONFIG_FEATURE_VI_USE_SIGNALS
1942 "\n\tSignal catching- ^C"
1943 "\n\tJob suspend and resume with ^Z"
1944 #endif /* CONFIG_FEATURE_VI_USE_SIGNALS */
1945 #ifdef CONFIG_FEATURE_VI_WIN_RESIZE
1946 "\n\tAdapt to window re-sizes"
1947 #endif /* CONFIG_FEATURE_VI_WIN_RESIZE */
1951 static inline void print_literal(Byte * buf, Byte * s) // copy s to buf, convert unprintable
1956 strcpy((char *) buf, ""); // init buf
1957 if (strlen((char *) s) <= 0)
1958 s = (Byte *) "(NULL)";
1959 for (; *s > '\0'; s++) {
1963 c_is_no_print = c > 127 && !Isprint(c);
1964 if (c_is_no_print) {
1965 strcat((char *) buf, SOn);
1968 if (c < ' ' || c == 127) {
1969 strcat((char *) buf, "^");
1976 strcat((char *) buf, (char *) b);
1978 strcat((char *) buf, SOs);
1980 strcat((char *) buf, "$");
1985 #ifdef CONFIG_FEATURE_VI_DOT_CMD
1986 static void start_new_cmd_q(Byte c)
1989 free(last_modifying_cmd);
1990 // get buffer for new cmd
1991 last_modifying_cmd = (Byte *) xmalloc(BUFSIZ);
1992 memset(last_modifying_cmd, '\0', BUFSIZ); // clear new cmd queue
1993 // if there is a current cmd count put it in the buffer first
1995 sprintf((char *) last_modifying_cmd, "%d%c", cmdcnt, c);
1996 else // just save char c onto queue
1997 last_modifying_cmd[0] = c;
2001 static void end_cmd_q(void)
2003 #ifdef CONFIG_FEATURE_VI_YANKMARK
2004 YDreg = 26; // go back to default Yank/Delete reg
2005 #endif /* CONFIG_FEATURE_VI_YANKMARK */
2009 #endif /* CONFIG_FEATURE_VI_DOT_CMD */
2011 #if defined(CONFIG_FEATURE_VI_YANKMARK) || defined(CONFIG_FEATURE_VI_SEARCH) || defined(CONFIG_FEATURE_VI_CRASHME)
2012 static Byte *string_insert(Byte * p, Byte * s) // insert the string at 'p'
2016 i = strlen((char *) s);
2017 p = text_hole_make(p, i);
2018 strncpy((char *) p, (char *) s, i);
2019 for (cnt = 0; *s != '\0'; s++) {
2023 #ifdef CONFIG_FEATURE_VI_YANKMARK
2024 psb("Put %d lines (%d chars) from [%c]", cnt, i, what_reg());
2025 #endif /* CONFIG_FEATURE_VI_YANKMARK */
2028 #endif /* CONFIG_FEATURE_VI_YANKMARK || CONFIG_FEATURE_VI_COLON || CONFIG_FEATURE_VI_CRASHME */
2030 #ifdef CONFIG_FEATURE_VI_YANKMARK
2031 static Byte *text_yank(Byte * p, Byte * q, int dest) // copy text into a register
2036 if (q < p) { // they are backwards- reverse them
2043 free(t); // if already a yank register, free it
2044 t = (Byte *) xmalloc(cnt + 1); // get a new register
2045 memset(t, '\0', cnt + 1); // clear new text[]
2046 strncpy((char *) t, (char *) p, cnt); // copy text[] into bufer
2051 static Byte what_reg(void)
2057 c = 'D'; // default to D-reg
2058 if (0 <= YDreg && YDreg <= 25)
2059 c = 'a' + (Byte) YDreg;
2067 static void check_context(Byte cmd)
2069 // A context is defined to be "modifying text"
2070 // Any modifying command establishes a new context.
2072 if (dot < context_start || dot > context_end) {
2073 if (strchr((char *) modifying_cmds, cmd) != NULL) {
2074 // we are trying to modify text[]- make this the current context
2075 mark[27] = mark[26]; // move cur to prev
2076 mark[26] = dot; // move local to cur
2077 context_start = prev_line(prev_line(dot));
2078 context_end = next_line(next_line(dot));
2079 //loiter= start_loiter= now;
2085 static inline Byte *swap_context(Byte * p) // goto new context for '' command make this the current context
2089 // the current context is in mark[26]
2090 // the previous context is in mark[27]
2091 // only swap context if other context is valid
2092 if (text <= mark[27] && mark[27] <= end - 1) {
2094 mark[27] = mark[26];
2096 p = mark[26]; // where we are going- previous context
2097 context_start = prev_line(prev_line(prev_line(p)));
2098 context_end = next_line(next_line(next_line(p)));
2102 #endif /* CONFIG_FEATURE_VI_YANKMARK */
2104 static int isblnk(Byte c) // is the char a blank or tab
2106 return (c == ' ' || c == '\t');
2109 //----- Set terminal attributes --------------------------------
2110 static void rawmode(void)
2112 tcgetattr(0, &term_orig);
2113 term_vi = term_orig;
2114 term_vi.c_lflag &= (~ICANON & ~ECHO); // leave ISIG ON- allow intr's
2115 term_vi.c_iflag &= (~IXON & ~ICRNL);
2116 term_vi.c_oflag &= (~ONLCR);
2117 term_vi.c_cc[VMIN] = 1;
2118 term_vi.c_cc[VTIME] = 0;
2119 erase_char = term_vi.c_cc[VERASE];
2120 tcsetattr(0, TCSANOW, &term_vi);
2123 static void cookmode(void)
2126 tcsetattr(0, TCSANOW, &term_orig);
2129 //----- Come here when we get a window resize signal ---------
2130 #ifdef CONFIG_FEATURE_VI_USE_SIGNALS
2131 static void winch_sig(int sig ATTRIBUTE_UNUSED)
2133 signal(SIGWINCH, winch_sig);
2134 #ifdef CONFIG_FEATURE_VI_WIN_RESIZE
2136 #endif /* CONFIG_FEATURE_VI_WIN_RESIZE */
2137 new_screen(rows, columns); // get memory for virtual screen
2138 redraw(TRUE); // re-draw the screen
2141 //----- Come here when we get a continue signal -------------------
2142 static void cont_sig(int sig ATTRIBUTE_UNUSED)
2144 rawmode(); // terminal to "raw"
2145 last_status_cksum = 0; // force status update
2146 redraw(TRUE); // re-draw the screen
2148 signal(SIGTSTP, suspend_sig);
2149 signal(SIGCONT, SIG_DFL);
2150 kill(my_pid, SIGCONT);
2153 //----- Come here when we get a Suspend signal -------------------
2154 static void suspend_sig(int sig ATTRIBUTE_UNUSED)
2156 place_cursor(rows - 1, 0, FALSE); // go to bottom of screen
2157 clear_to_eol(); // Erase to end of line
2158 cookmode(); // terminal to "cooked"
2160 signal(SIGCONT, cont_sig);
2161 signal(SIGTSTP, SIG_DFL);
2162 kill(my_pid, SIGTSTP);
2165 //----- Come here when we get a signal ---------------------------
2166 static void catch_sig(int sig)
2168 signal(SIGHUP, catch_sig);
2169 signal(SIGINT, catch_sig);
2170 signal(SIGTERM, catch_sig);
2171 signal(SIGALRM, catch_sig);
2173 longjmp(restart, sig);
2176 //----- Come here when we get a core dump signal -----------------
2177 static void core_sig(int sig)
2179 signal(SIGQUIT, core_sig);
2180 signal(SIGILL, core_sig);
2181 signal(SIGTRAP, core_sig);
2182 signal(SIGABRT, core_sig);
2183 signal(SIGFPE, core_sig);
2184 signal(SIGBUS, core_sig);
2185 signal(SIGSEGV, core_sig);
2187 signal(SIGSYS, core_sig);
2190 if(sig) { // signaled
2191 dot = bound_dot(dot); // make sure "dot" is valid
2192 longjmp(restart, sig);
2195 #endif /* CONFIG_FEATURE_VI_USE_SIGNALS */
2197 static int mysleep(int hund) // sleep for 'h' 1/100 seconds
2199 // Don't hang- Wait 5/100 seconds- 1 Sec= 1000000
2204 tv.tv_usec = hund * 10000;
2205 select(1, &rfds, NULL, NULL, &tv);
2206 return (FD_ISSET(0, &rfds));
2209 #define readbuffer bb_common_bufsiz1
2211 static int readed_for_parse;
2213 //----- IO Routines --------------------------------------------
2214 static Byte readit(void) // read (maybe cursor) key from stdin
2223 static const struct esc_cmds esccmds[] = {
2224 {"OA", (Byte) VI_K_UP}, // cursor key Up
2225 {"OB", (Byte) VI_K_DOWN}, // cursor key Down
2226 {"OC", (Byte) VI_K_RIGHT}, // Cursor Key Right
2227 {"OD", (Byte) VI_K_LEFT}, // cursor key Left
2228 {"OH", (Byte) VI_K_HOME}, // Cursor Key Home
2229 {"OF", (Byte) VI_K_END}, // Cursor Key End
2230 {"[A", (Byte) VI_K_UP}, // cursor key Up
2231 {"[B", (Byte) VI_K_DOWN}, // cursor key Down
2232 {"[C", (Byte) VI_K_RIGHT}, // Cursor Key Right
2233 {"[D", (Byte) VI_K_LEFT}, // cursor key Left
2234 {"[H", (Byte) VI_K_HOME}, // Cursor Key Home
2235 {"[F", (Byte) VI_K_END}, // Cursor Key End
2236 {"[1~", (Byte) VI_K_HOME}, // Cursor Key Home
2237 {"[2~", (Byte) VI_K_INSERT}, // Cursor Key Insert
2238 {"[4~", (Byte) VI_K_END}, // Cursor Key End
2239 {"[5~", (Byte) VI_K_PAGEUP}, // Cursor Key Page Up
2240 {"[6~", (Byte) VI_K_PAGEDOWN}, // Cursor Key Page Down
2241 {"OP", (Byte) VI_K_FUN1}, // Function Key F1
2242 {"OQ", (Byte) VI_K_FUN2}, // Function Key F2
2243 {"OR", (Byte) VI_K_FUN3}, // Function Key F3
2244 {"OS", (Byte) VI_K_FUN4}, // Function Key F4
2245 {"[15~", (Byte) VI_K_FUN5}, // Function Key F5
2246 {"[17~", (Byte) VI_K_FUN6}, // Function Key F6
2247 {"[18~", (Byte) VI_K_FUN7}, // Function Key F7
2248 {"[19~", (Byte) VI_K_FUN8}, // Function Key F8
2249 {"[20~", (Byte) VI_K_FUN9}, // Function Key F9
2250 {"[21~", (Byte) VI_K_FUN10}, // Function Key F10
2251 {"[23~", (Byte) VI_K_FUN11}, // Function Key F11
2252 {"[24~", (Byte) VI_K_FUN12}, // Function Key F12
2253 {"[11~", (Byte) VI_K_FUN1}, // Function Key F1
2254 {"[12~", (Byte) VI_K_FUN2}, // Function Key F2
2255 {"[13~", (Byte) VI_K_FUN3}, // Function Key F3
2256 {"[14~", (Byte) VI_K_FUN4}, // Function Key F4
2259 #define ESCCMDS_COUNT (sizeof(esccmds)/sizeof(struct esc_cmds))
2261 (void) alarm(0); // turn alarm OFF while we wait for input
2263 n = readed_for_parse;
2264 // get input from User- are there already input chars in Q?
2267 // the Q is empty, wait for a typed char
2268 n = read(0, readbuffer, BUFSIZ - 1);
2271 goto ri0; // interrupted sys call
2274 if (errno == EFAULT)
2276 if (errno == EINVAL)
2284 if (readbuffer[0] == 27) {
2285 // This is an ESC char. Is this Esc sequence?
2286 // Could be bare Esc key. See if there are any
2287 // more chars to read after the ESC. This would
2288 // be a Function or Cursor Key sequence.
2292 tv.tv_usec = 50000; // Wait 5/100 seconds- 1 Sec=1000000
2294 // keep reading while there are input chars and room in buffer
2295 while (select(1, &rfds, NULL, NULL, &tv) > 0 && n <= (BUFSIZ - 5)) {
2296 // read the rest of the ESC string
2297 int r = read(0, (void *) (readbuffer + n), BUFSIZ - n);
2303 readed_for_parse = n;
2306 if(c == 27 && n > 1) {
2307 // Maybe cursor or function key?
2308 const struct esc_cmds *eindex;
2310 for (eindex = esccmds; eindex < &esccmds[ESCCMDS_COUNT]; eindex++) {
2311 int cnt = strlen(eindex->seq);
2315 if(strncmp(eindex->seq, (char *) readbuffer + 1, cnt))
2317 // is a Cursor key- put derived value back into Q
2319 // for squeeze out the ESC sequence
2323 if(eindex == &esccmds[ESCCMDS_COUNT]) {
2324 /* defined ESC sequence not found, set only one ESC */
2330 // remove key sequence from Q
2331 readed_for_parse -= n;
2332 memmove(readbuffer, readbuffer + n, BUFSIZ - n);
2333 (void) alarm(3); // we are done waiting for input, turn alarm ON
2337 //----- IO Routines --------------------------------------------
2338 static Byte get_one_char(void)
2342 #ifdef CONFIG_FEATURE_VI_DOT_CMD
2343 // ! adding2q && ioq == 0 read()
2344 // ! adding2q && ioq != 0 *ioq
2345 // adding2q *last_modifying_cmd= read()
2347 // we are not adding to the q.
2348 // but, we may be reading from a q
2350 // there is no current q, read from STDIN
2351 c = readit(); // get the users input
2353 // there is a queue to get chars from first
2356 // the end of the q, read from STDIN
2358 ioq_start = ioq = 0;
2359 c = readit(); // get the users input
2363 // adding STDIN chars to q
2364 c = readit(); // get the users input
2365 if (last_modifying_cmd != 0) {
2366 int len = strlen((char *) last_modifying_cmd);
2367 if (len + 1 >= BUFSIZ) {
2368 psbs("last_modifying_cmd overrun");
2370 // add new char to q
2371 last_modifying_cmd[len] = c;
2375 #else /* CONFIG_FEATURE_VI_DOT_CMD */
2376 c = readit(); // get the users input
2377 #endif /* CONFIG_FEATURE_VI_DOT_CMD */
2378 return (c); // return the char, where ever it came from
2381 static Byte *get_input_line(Byte * prompt) // get input line- use "status line"
2386 static Byte *obufp = NULL;
2388 strcpy((char *) buf, (char *) prompt);
2389 last_status_cksum = 0; // force status update
2390 place_cursor(rows - 1, 0, FALSE); // go to Status line, bottom of screen
2391 clear_to_eol(); // clear the line
2392 write1((char *) prompt); // write out the :, /, or ? prompt
2394 for (i = strlen((char *) buf); i < BUFSIZ;) {
2395 c = get_one_char(); // read user input
2396 if (c == '\n' || c == '\r' || c == 27)
2397 break; // is this end of input
2398 if (c == erase_char || c == 8 || c == 127) {
2399 // user wants to erase prev char
2400 i--; // backup to prev char
2401 buf[i] = '\0'; // erase the char
2402 buf[i + 1] = '\0'; // null terminate buffer
2403 write1("\b \b"); // erase char on screen
2404 if (i <= 0) { // user backs up before b-o-l, exit
2408 buf[i] = c; // save char in buffer
2409 buf[i + 1] = '\0'; // make sure buffer is null terminated
2410 putchar(c); // echo the char back to user
2416 obufp = (Byte *) bb_xstrdup((char *) buf);
2420 static int file_size(const Byte * fn) // what is the byte size of "fn"
2425 if (fn == 0 || strlen((char *)fn) <= 0)
2428 sr = stat((char *) fn, &st_buf); // see if file exists
2430 cnt = (int) st_buf.st_size;
2435 static int file_insert(Byte * fn, Byte * p, int size)
2440 #ifdef CONFIG_FEATURE_VI_READONLY
2442 #endif /* CONFIG_FEATURE_VI_READONLY */
2443 if (fn == 0 || strlen((char*) fn) <= 0) {
2444 psbs("No filename given");
2448 // OK- this is just a no-op
2453 psbs("Trying to insert a negative number (%d) of characters", size);
2456 if (p < text || p > end) {
2457 psbs("Trying to insert file outside of memory");
2461 // see if we can open the file
2462 #ifdef CONFIG_FEATURE_VI_READONLY
2463 if (vi_readonly) goto fi1; // do not try write-mode
2465 fd = open((char *) fn, O_RDWR); // assume read & write
2467 // could not open for writing- maybe file is read only
2468 #ifdef CONFIG_FEATURE_VI_READONLY
2471 fd = open((char *) fn, O_RDONLY); // try read-only
2473 psbs("\"%s\" %s", fn, "could not open file");
2476 #ifdef CONFIG_FEATURE_VI_READONLY
2477 // got the file- read-only
2479 #endif /* CONFIG_FEATURE_VI_READONLY */
2481 p = text_hole_make(p, size);
2482 cnt = read(fd, p, size);
2486 p = text_hole_delete(p, p + size - 1); // un-do buffer insert
2487 psbs("could not read file \"%s\"", fn);
2488 } else if (cnt < size) {
2489 // There was a partial read, shrink unused space text[]
2490 p = text_hole_delete(p + cnt, p + (size - cnt) - 1); // un-do buffer insert
2491 psbs("could not read all of file \"%s\"", fn);
2499 static int file_write(Byte * fn, Byte * first, Byte * last)
2501 int fd, cnt, charcnt;
2504 psbs("No current filename");
2508 // FIXIT- use the correct umask()
2509 fd = open((char *) fn, (O_WRONLY | O_CREAT | O_TRUNC), 0664);
2512 cnt = last - first + 1;
2513 charcnt = write(fd, first, cnt);
2514 if (charcnt == cnt) {
2516 //file_modified= FALSE; // the file has not been modified
2524 //----- Terminal Drawing ---------------------------------------
2525 // The terminal is made up of 'rows' line of 'columns' columns.
2526 // classically this would be 24 x 80.
2527 // screen coordinates
2533 // 23,0 ... 23,79 status line
2536 //----- Move the cursor to row x col (count from 0, not 1) -------
2537 static void place_cursor(int row, int col, int opti)
2541 #ifdef CONFIG_FEATURE_VI_OPTIMIZE_CURSOR
2544 // char cm3[BUFSIZ];
2546 #endif /* CONFIG_FEATURE_VI_OPTIMIZE_CURSOR */
2548 memset(cm1, '\0', BUFSIZ - 1); // clear the buffer
2550 if (row < 0) row = 0;
2551 if (row >= rows) row = rows - 1;
2552 if (col < 0) col = 0;
2553 if (col >= columns) col = columns - 1;
2555 //----- 1. Try the standard terminal ESC sequence
2556 sprintf((char *) cm1, CMrc, row + 1, col + 1);
2558 if (! opti) goto pc0;
2560 #ifdef CONFIG_FEATURE_VI_OPTIMIZE_CURSOR
2561 //----- find the minimum # of chars to move cursor -------------
2562 //----- 2. Try moving with discreet chars (Newline, [back]space, ...)
2563 memset(cm2, '\0', BUFSIZ - 1); // clear the buffer
2565 // move to the correct row
2566 while (row < Rrow) {
2567 // the cursor has to move up
2571 while (row > Rrow) {
2572 // the cursor has to move down
2573 strcat(cm2, CMdown);
2577 // now move to the correct column
2578 strcat(cm2, "\r"); // start at col 0
2579 // just send out orignal source char to get to correct place
2580 screenp = &screen[row * columns]; // start of screen line
2581 strncat(cm2, (char* )screenp, col);
2583 //----- 3. Try some other way of moving cursor
2584 //---------------------------------------------
2586 // pick the shortest cursor motion to send out
2588 if (strlen(cm2) < strlen(cm)) {
2590 } /* else if (strlen(cm3) < strlen(cm)) {
2593 #endif /* CONFIG_FEATURE_VI_OPTIMIZE_CURSOR */
2595 write1(cm); // move the cursor
2598 //----- Erase from cursor to end of line -----------------------
2599 static void clear_to_eol(void)
2601 write1(Ceol); // Erase from cursor to end of line
2604 //----- Erase from cursor to end of screen -----------------------
2605 static void clear_to_eos(void)
2607 write1(Ceos); // Erase from cursor to end of screen
2610 //----- Start standout mode ------------------------------------
2611 static void standout_start(void) // send "start reverse video" sequence
2613 write1(SOs); // Start reverse video mode
2616 //----- End standout mode --------------------------------------
2617 static void standout_end(void) // send "end reverse video" sequence
2619 write1(SOn); // End reverse video mode
2622 //----- Flash the screen --------------------------------------
2623 static void flash(int h)
2625 standout_start(); // send "start reverse video" sequence
2628 standout_end(); // send "end reverse video" sequence
2632 static void Indicate_Error(void)
2634 #ifdef CONFIG_FEATURE_VI_CRASHME
2636 return; // generate a random command
2637 #endif /* CONFIG_FEATURE_VI_CRASHME */
2639 write1(bell); // send out a bell character
2645 //----- Screen[] Routines --------------------------------------
2646 //----- Erase the Screen[] memory ------------------------------
2647 static void screen_erase(void)
2649 memset(screen, ' ', screensize); // clear new screen
2652 static int bufsum(unsigned char *buf, int count)
2655 unsigned char *e = buf + count;
2661 //----- Draw the status line at bottom of the screen -------------
2662 static void show_status_line(void)
2664 int cnt = 0, cksum = 0;
2666 // either we already have an error or status message, or we
2668 if (!have_status_msg) {
2669 cnt = format_edit_status();
2670 cksum = bufsum(status_buffer, cnt);
2672 if (have_status_msg || ((cnt > 0 && last_status_cksum != cksum))) {
2673 last_status_cksum= cksum; // remember if we have seen this line
2674 place_cursor(rows - 1, 0, FALSE); // put cursor on status line
2675 write1((char*)status_buffer);
2677 if (have_status_msg) {
2678 if (((int)strlen((char*)status_buffer) - (have_status_msg - 1)) >
2680 have_status_msg = 0;
2683 have_status_msg = 0;
2685 place_cursor(crow, ccol, FALSE); // put cursor back in correct place
2690 //----- format the status buffer, the bottom line of screen ------
2691 // format status buffer, with STANDOUT mode
2692 static void psbs(const char *format, ...)
2696 va_start(args, format);
2697 strcpy((char *) status_buffer, SOs); // Terminal standout mode on
2698 vsprintf((char *) status_buffer + strlen((char *) status_buffer), format, args);
2699 strcat((char *) status_buffer, SOn); // Terminal standout mode off
2702 have_status_msg = 1 + sizeof(SOs) + sizeof(SOn) - 2;
2707 // format status buffer
2708 static void psb(const char *format, ...)
2712 va_start(args, format);
2713 vsprintf((char *) status_buffer, format, args);
2716 have_status_msg = 1;
2721 static void ni(Byte * s) // display messages
2725 print_literal(buf, s);
2726 psbs("\'%s\' is not implemented", buf);
2729 static int format_edit_status(void) // show file status on status line
2731 int cur, percent, ret, trunc_at;
2734 // file_modified is now a counter rather than a flag. this
2735 // helps reduce the amount of line counting we need to do.
2736 // (this will cause a mis-reporting of modified status
2737 // once every MAXINT editing operations.)
2739 // it would be nice to do a similar optimization here -- if
2740 // we haven't done a motion that could have changed which line
2741 // we're on, then we shouldn't have to do this count_lines()
2742 cur = count_lines(text, dot);
2744 // reduce counting -- the total lines can't have
2745 // changed if we haven't done any edits.
2746 if (file_modified != last_file_modified) {
2747 tot = cur + count_lines(dot, end - 1) - 1;
2748 last_file_modified = file_modified;
2751 // current line percent
2752 // ------------- ~~ ----------
2755 percent = (100 * cur) / tot;
2761 trunc_at = columns < STATUS_BUFFER_LEN-1 ?
2762 columns : STATUS_BUFFER_LEN-1;
2764 ret = snprintf((char *) status_buffer, trunc_at+1,
2765 #ifdef CONFIG_FEATURE_VI_READONLY
2766 "%c %s%s%s %d/%d %d%%",
2768 "%c %s%s %d/%d %d%%",
2770 (cmd_mode ? (cmd_mode == 2 ? 'R':'I'):'-'),
2771 (cfn != 0 ? (char *) cfn : "No file"),
2772 #ifdef CONFIG_FEATURE_VI_READONLY
2773 ((vi_readonly || readonly) ? " [Read-only]" : ""),
2775 (file_modified ? " [modified]" : ""),
2778 if (ret >= 0 && ret < trunc_at)
2779 return ret; /* it all fit */
2781 return trunc_at; /* had to truncate */
2784 //----- Force refresh of all Lines -----------------------------
2785 static void redraw(int full_screen)
2787 place_cursor(0, 0, FALSE); // put cursor in correct place
2788 clear_to_eos(); // tel terminal to erase display
2789 screen_erase(); // erase the internal screen buffer
2790 last_status_cksum = 0; // force status update
2791 refresh(full_screen); // this will redraw the entire display
2795 //----- Format a text[] line into a buffer ---------------------
2796 static void format_line(Byte *dest, Byte *src, int li)
2801 for (co= 0; co < MAX_SCR_COLS; co++) {
2802 c= ' '; // assume blank
2803 if (li > 0 && co == 0) {
2804 c = '~'; // not first line, assume Tilde
2806 // are there chars in text[] and have we gone past the end
2807 if (text < end && src < end) {
2812 if (c > 127 && !Isprint(c)) {
2815 if (c < ' ' || c == 127) {
2819 for (; (co % tabstop) != (tabstop - 1); co++) {
2827 c += '@'; // make it visible
2830 // the co++ is done here so that the column will
2831 // not be overwritten when we blank-out the rest of line
2838 //----- Refresh the changed screen lines -----------------------
2839 // Copy the source line from text[] into the buffer and note
2840 // if the current screenline is different from the new buffer.
2841 // If they differ then that line needs redrawing on the terminal.
2843 static void refresh(int full_screen)
2845 static int old_offset;
2847 Byte buf[MAX_SCR_COLS];
2848 Byte *tp, *sp; // pointer into text[] and screen[]
2849 #ifdef CONFIG_FEATURE_VI_OPTIMIZE_CURSOR
2850 int last_li= -2; // last line that changed- for optimizing cursor movement
2851 #endif /* CONFIG_FEATURE_VI_OPTIMIZE_CURSOR */
2853 #ifdef CONFIG_FEATURE_VI_WIN_RESIZE
2855 #endif /* CONFIG_FEATURE_VI_WIN_RESIZE */
2856 sync_cursor(dot, &crow, &ccol); // where cursor will be (on "dot")
2857 tp = screenbegin; // index into text[] of top line
2859 // compare text[] to screen[] and mark screen[] lines that need updating
2860 for (li = 0; li < rows - 1; li++) {
2861 int cs, ce; // column start & end
2862 memset(buf, ' ', MAX_SCR_COLS); // blank-out the buffer
2863 buf[MAX_SCR_COLS-1] = 0; // NULL terminate the buffer
2864 // format current text line into buf
2865 format_line(buf, tp, li);
2867 // skip to the end of the current text[] line
2868 while (tp < end && *tp++ != '\n') /*no-op*/ ;
2870 // see if there are any changes between vitual screen and buf
2871 changed = FALSE; // assume no change
2874 sp = &screen[li * columns]; // start of screen line
2876 // force re-draw of every single column from 0 - columns-1
2879 // compare newly formatted buffer with virtual screen
2880 // look forward for first difference between buf and screen
2881 for ( ; cs <= ce; cs++) {
2882 if (buf[cs + offset] != sp[cs]) {
2883 changed = TRUE; // mark for redraw
2888 // look backward for last difference between buf and screen
2889 for ( ; ce >= cs; ce--) {
2890 if (buf[ce + offset] != sp[ce]) {
2891 changed = TRUE; // mark for redraw
2895 // now, cs is index of first diff, and ce is index of last diff
2897 // if horz offset has changed, force a redraw
2898 if (offset != old_offset) {
2903 // make a sanity check of columns indexes
2905 if (ce > columns-1) ce= columns-1;
2906 if (cs > ce) { cs= 0; ce= columns-1; }
2907 // is there a change between vitual screen and buf
2909 // copy changed part of buffer to virtual screen
2910 memmove(sp+cs, buf+(cs+offset), ce-cs+1);
2912 // move cursor to column of first change
2913 if (offset != old_offset) {
2914 // opti_cur_move is still too stupid
2915 // to handle offsets correctly
2916 place_cursor(li, cs, FALSE);
2918 #ifdef CONFIG_FEATURE_VI_OPTIMIZE_CURSOR
2919 // if this just the next line
2920 // try to optimize cursor movement
2921 // otherwise, use standard ESC sequence
2922 place_cursor(li, cs, li == (last_li+1) ? TRUE : FALSE);
2924 #else /* CONFIG_FEATURE_VI_OPTIMIZE_CURSOR */
2925 place_cursor(li, cs, FALSE); // use standard ESC sequence
2926 #endif /* CONFIG_FEATURE_VI_OPTIMIZE_CURSOR */
2929 // write line out to terminal
2932 char *out = (char*)sp+cs;
2939 #ifdef CONFIG_FEATURE_VI_OPTIMIZE_CURSOR
2941 #endif /* CONFIG_FEATURE_VI_OPTIMIZE_CURSOR */
2945 #ifdef CONFIG_FEATURE_VI_OPTIMIZE_CURSOR
2946 place_cursor(crow, ccol, (crow == last_row) ? TRUE : FALSE);
2949 place_cursor(crow, ccol, FALSE);
2950 #endif /* CONFIG_FEATURE_VI_OPTIMIZE_CURSOR */
2952 if (offset != old_offset)
2953 old_offset = offset;
2956 //---------------------------------------------------------------------
2957 //----- the Ascii Chart -----------------------------------------------
2959 // 00 nul 01 soh 02 stx 03 etx 04 eot 05 enq 06 ack 07 bel
2960 // 08 bs 09 ht 0a nl 0b vt 0c np 0d cr 0e so 0f si
2961 // 10 dle 11 dc1 12 dc2 13 dc3 14 dc4 15 nak 16 syn 17 etb
2962 // 18 can 19 em 1a sub 1b esc 1c fs 1d gs 1e rs 1f us
2963 // 20 sp 21 ! 22 " 23 # 24 $ 25 % 26 & 27 '
2964 // 28 ( 29 ) 2a * 2b + 2c , 2d - 2e . 2f /
2965 // 30 0 31 1 32 2 33 3 34 4 35 5 36 6 37 7
2966 // 38 8 39 9 3a : 3b ; 3c < 3d = 3e > 3f ?
2967 // 40 @ 41 A 42 B 43 C 44 D 45 E 46 F 47 G
2968 // 48 H 49 I 4a J 4b K 4c L 4d M 4e N 4f O
2969 // 50 P 51 Q 52 R 53 S 54 T 55 U 56 V 57 W
2970 // 58 X 59 Y 5a Z 5b [ 5c \ 5d ] 5e ^ 5f _
2971 // 60 ` 61 a 62 b 63 c 64 d 65 e 66 f 67 g
2972 // 68 h 69 i 6a j 6b k 6c l 6d m 6e n 6f o
2973 // 70 p 71 q 72 r 73 s 74 t 75 u 76 v 77 w
2974 // 78 x 79 y 7a z 7b { 7c | 7d } 7e ~ 7f del
2975 //---------------------------------------------------------------------
2977 //----- Execute a Vi Command -----------------------------------
2978 static void do_cmd(Byte c)
2980 Byte c1, *p, *q, *msg, buf[9], *save_dot;
2981 int cnt, i, j, dir, yf;
2983 c1 = c; // quiet the compiler
2984 cnt = yf = dir = 0; // quiet the compiler
2985 p = q = save_dot = msg = buf; // quiet the compiler
2986 memset(buf, '\0', 9); // clear buf
2990 /* if this is a cursor key, skip these checks */
3003 if (cmd_mode == 2) {
3004 // flip-flop Insert/Replace mode
3005 if (c == VI_K_INSERT) goto dc_i;
3006 // we are 'R'eplacing the current *dot with new char
3008 // don't Replace past E-o-l
3009 cmd_mode = 1; // convert to insert
3011 if (1 <= c || Isprint(c)) {
3013 dot = yank_delete(dot, dot, 0, YANKDEL); // delete char
3014 dot = char_insert(dot, c); // insert new char
3019 if (cmd_mode == 1) {
3020 // hitting "Insert" twice means "R" replace mode
3021 if (c == VI_K_INSERT) goto dc5;
3022 // insert the char c at "dot"
3023 if (1 <= c || Isprint(c)) {
3024 dot = char_insert(dot, c);
3039 #ifdef CONFIG_FEATURE_VI_CRASHME
3040 case 0x14: // dc4 ctrl-T
3041 crashme = (crashme == 0) ? 1 : 0;
3043 #endif /* CONFIG_FEATURE_VI_CRASHME */
3072 //case 'u': // u- FIXME- there is no undo
3074 default: // unrecognised command
3083 end_cmd_q(); // stop adding to q
3084 case 0x00: // nul- ignore
3086 case 2: // ctrl-B scroll up full screen
3087 case VI_K_PAGEUP: // Cursor Key Page Up
3088 dot_scroll(rows - 2, -1);
3090 #ifdef CONFIG_FEATURE_VI_USE_SIGNALS
3091 case 0x03: // ctrl-C interrupt
3092 longjmp(restart, 1);
3094 case 26: // ctrl-Z suspend
3095 suspend_sig(SIGTSTP);
3097 #endif /* CONFIG_FEATURE_VI_USE_SIGNALS */
3098 case 4: // ctrl-D scroll down half screen
3099 dot_scroll((rows - 2) / 2, 1);
3101 case 5: // ctrl-E scroll down one line
3104 case 6: // ctrl-F scroll down full screen
3105 case VI_K_PAGEDOWN: // Cursor Key Page Down
3106 dot_scroll(rows - 2, 1);
3108 case 7: // ctrl-G show current status
3109 last_status_cksum = 0; // force status update
3111 case 'h': // h- move left
3112 case VI_K_LEFT: // cursor key Left
3113 case 8: // ctrl-H- move left (This may be ERASE char)
3114 case 127: // DEL- move left (This may be ERASE char)
3120 case 10: // Newline ^J
3121 case 'j': // j- goto next line, same col
3122 case VI_K_DOWN: // cursor key Down
3126 dot_next(); // go to next B-o-l
3127 dot = move_to_col(dot, ccol + offset); // try stay in same col
3129 case 12: // ctrl-L force redraw whole screen
3130 case 18: // ctrl-R force redraw
3131 place_cursor(0, 0, FALSE); // put cursor in correct place
3132 clear_to_eos(); // tel terminal to erase display
3134 screen_erase(); // erase the internal screen buffer
3135 last_status_cksum = 0; // force status update
3136 refresh(TRUE); // this will redraw the entire display
3138 case 13: // Carriage Return ^M
3139 case '+': // +- goto next line
3146 case 21: // ctrl-U scroll up half screen
3147 dot_scroll((rows - 2) / 2, -1);
3149 case 25: // ctrl-Y scroll up one line
3155 cmd_mode = 0; // stop insrting
3157 last_status_cksum = 0; // force status update
3159 case ' ': // move right
3160 case 'l': // move right
3161 case VI_K_RIGHT: // Cursor Key Right
3167 #ifdef CONFIG_FEATURE_VI_YANKMARK
3168 case '"': // "- name a register to use for Delete/Yank
3169 c1 = get_one_char();
3177 case '\'': // '- goto a specific mark
3178 c1 = get_one_char();
3184 if (text <= q && q < end) {
3186 dot_begin(); // go to B-o-l
3189 } else if (c1 == '\'') { // goto previous context
3190 dot = swap_context(dot); // swap current and previous context
3191 dot_begin(); // go to B-o-l
3197 case 'm': // m- Mark a line
3198 // this is really stupid. If there are any inserts or deletes
3199 // between text[0] and dot then this mark will not point to the
3200 // correct location! It could be off by many lines!
3201 // Well..., at least its quick and dirty.
3202 c1 = get_one_char();
3206 // remember the line
3207 mark[(int) c1] = dot;
3212 case 'P': // P- Put register before
3213 case 'p': // p- put register after
3216 psbs("Nothing in register %c", what_reg());
3219 // are we putting whole lines or strings
3220 if (strchr((char *) p, '\n') != NULL) {
3222 dot_begin(); // putting lines- Put above
3225 // are we putting after very last line?
3226 if (end_line(dot) == (end - 1)) {
3227 dot = end; // force dot to end of text[]
3229 dot_next(); // next line, then put before
3234 dot_right(); // move to right, can move to NL
3236 dot = string_insert(dot, p); // insert the string
3237 end_cmd_q(); // stop adding to q
3239 case 'U': // U- Undo; replace current line with original version
3240 if (reg[Ureg] != 0) {
3241 p = begin_line(dot);
3243 p = text_hole_delete(p, q); // delete cur line
3244 p = string_insert(p, reg[Ureg]); // insert orig line
3249 #endif /* CONFIG_FEATURE_VI_YANKMARK */
3250 case '$': // $- goto end of line
3251 case VI_K_END: // Cursor Key End
3255 dot = end_line(dot);
3257 case '%': // %- find matching char of pair () [] {}
3258 for (q = dot; q < end && *q != '\n'; q++) {
3259 if (strchr("()[]{}", *q) != NULL) {
3260 // we found half of a pair
3261 p = find_pair(q, *q);
3273 case 'f': // f- forward to a user specified char
3274 last_forward_char = get_one_char(); // get the search char
3276 // dont separate these two commands. 'f' depends on ';'
3278 //**** fall thru to ... ';'
3279 case ';': // ;- look at rest of line for last forward char
3283 if (last_forward_char == 0) break;
3285 while (q < end - 1 && *q != '\n' && *q != last_forward_char) {
3288 if (*q == last_forward_char)
3291 case '-': // -- goto prev line
3298 #ifdef CONFIG_FEATURE_VI_DOT_CMD
3299 case '.': // .- repeat the last modifying command
3300 // Stuff the last_modifying_cmd back into stdin
3301 // and let it be re-executed.
3302 if (last_modifying_cmd != 0) {
3303 ioq = ioq_start = (Byte *) bb_xstrdup((char *) last_modifying_cmd);
3306 #endif /* CONFIG_FEATURE_VI_DOT_CMD */
3307 #ifdef CONFIG_FEATURE_VI_SEARCH
3308 case '?': // /- search for a pattern
3309 case '/': // /- search for a pattern
3312 q = get_input_line(buf); // get input line- use "status line"
3313 if (strlen((char *) q) == 1)
3314 goto dc3; // if no pat re-use old pat
3315 if (strlen((char *) q) > 1) { // new pat- save it and find
3316 // there is a new pat
3317 free(last_search_pattern);
3318 last_search_pattern = (Byte *) bb_xstrdup((char *) q);
3319 goto dc3; // now find the pattern
3321 // user changed mind and erased the "/"- do nothing
3323 case 'N': // N- backward search for last pattern
3327 dir = BACK; // assume BACKWARD search
3329 if (last_search_pattern[0] == '?') {
3333 goto dc4; // now search for pattern
3335 case 'n': // n- repeat search for last pattern
3336 // search rest of text[] starting at next char
3337 // if search fails return orignal "p" not the "p+1" address
3342 if (last_search_pattern == 0) {
3343 msg = (Byte *) "No previous regular expression";
3346 if (last_search_pattern[0] == '/') {
3347 dir = FORWARD; // assume FORWARD search
3350 if (last_search_pattern[0] == '?') {
3355 q = char_search(p, last_search_pattern + 1, dir, FULL);
3357 dot = q; // good search, update "dot"
3361 // no pattern found between "dot" and "end"- continue at top
3366 q = char_search(p, last_search_pattern + 1, dir, FULL);
3367 if (q != NULL) { // found something
3368 dot = q; // found new pattern- goto it
3369 msg = (Byte *) "search hit BOTTOM, continuing at TOP";
3371 msg = (Byte *) "search hit TOP, continuing at BOTTOM";
3374 msg = (Byte *) "Pattern not found";
3377 if (*msg) psbs("%s", msg);
3379 case '{': // {- move backward paragraph
3380 q = char_search(dot, (Byte *) "\n\n", BACK, FULL);
3381 if (q != NULL) { // found blank line
3382 dot = next_line(q); // move to next blank line
3385 case '}': // }- move forward paragraph
3386 q = char_search(dot, (Byte *) "\n\n", FORWARD, FULL);
3387 if (q != NULL) { // found blank line
3388 dot = next_line(q); // move to next blank line
3391 #endif /* CONFIG_FEATURE_VI_SEARCH */
3392 case '0': // 0- goto begining of line
3402 if (c == '0' && cmdcnt < 1) {
3403 dot_begin(); // this was a standalone zero
3405 cmdcnt = cmdcnt * 10 + (c - '0'); // this 0 is part of a number
3408 case ':': // :- the colon mode commands
3409 p = get_input_line((Byte *) ":"); // get input line- use "status line"
3410 #ifdef CONFIG_FEATURE_VI_COLON
3411 colon(p); // execute the command
3412 #else /* CONFIG_FEATURE_VI_COLON */
3414 p++; // move past the ':'
3415 cnt = strlen((char *) p);
3418 if (strncasecmp((char *) p, "quit", cnt) == 0 ||
3419 strncasecmp((char *) p, "q!", cnt) == 0) { // delete lines
3420 if (file_modified && p[1] != '!') {
3421 psbs("No write since last change (:quit! overrides)");
3425 } else if (strncasecmp((char *) p, "write", cnt) == 0
3426 || strncasecmp((char *) p, "wq", cnt) == 0
3427 || strncasecmp((char *) p, "wn", cnt) == 0
3428 || strncasecmp((char *) p, "x", cnt) == 0) {
3429 cnt = file_write(cfn, text, end - 1);
3432 psbs("Write error: %s", strerror(errno));
3435 last_file_modified = -1;
3436 psb("\"%s\" %dL, %dC", cfn, count_lines(text, end - 1), cnt);
3437 if (p[0] == 'x' || p[1] == 'q' || p[1] == 'n' ||
3438 p[0] == 'X' || p[1] == 'Q' || p[1] == 'N') {
3442 } else if (strncasecmp((char *) p, "file", cnt) == 0 ) {
3443 last_status_cksum = 0; // force status update
3444 } else if (sscanf((char *) p, "%d", &j) > 0) {
3445 dot = find_line(j); // go to line # j
3447 } else { // unrecognised cmd
3450 #endif /* CONFIG_FEATURE_VI_COLON */
3452 case '<': // <- Left shift something
3453 case '>': // >- Right shift something
3454 cnt = count_lines(text, dot); // remember what line we are on
3455 c1 = get_one_char(); // get the type of thing to delete
3456 find_range(&p, &q, c1);
3457 (void) yank_delete(p, q, 1, YANKONLY); // save copy before change
3460 i = count_lines(p, q); // # of lines we are shifting
3461 for ( ; i > 0; i--, p = next_line(p)) {
3463 // shift left- remove tab or 8 spaces
3465 // shrink buffer 1 char
3466 (void) text_hole_delete(p, p);
3467 } else if (*p == ' ') {
3468 // we should be calculating columns, not just SPACE
3469 for (j = 0; *p == ' ' && j < tabstop; j++) {
3470 (void) text_hole_delete(p, p);
3473 } else if (c == '>') {
3474 // shift right -- add tab or 8 spaces
3475 (void) char_insert(p, '\t');
3478 dot = find_line(cnt); // what line were we on
3480 end_cmd_q(); // stop adding to q
3482 case 'A': // A- append at e-o-l
3483 dot_end(); // go to e-o-l
3484 //**** fall thru to ... 'a'
3485 case 'a': // a- append after current char
3490 case 'B': // B- back a blank-delimited Word
3491 case 'E': // E- end of a blank-delimited word
3492 case 'W': // W- forward a blank-delimited word
3499 if (c == 'W' || isspace(dot[dir])) {
3500 dot = skip_thing(dot, 1, dir, S_TO_WS);
3501 dot = skip_thing(dot, 2, dir, S_OVER_WS);
3504 dot = skip_thing(dot, 1, dir, S_BEFORE_WS);
3506 case 'C': // C- Change to e-o-l
3507 case 'D': // D- delete to e-o-l
3509 dot = dollar_line(dot); // move to before NL
3510 // copy text into a register and delete
3511 dot = yank_delete(save_dot, dot, 0, YANKDEL); // delete to e-o-l
3513 goto dc_i; // start inserting
3514 #ifdef CONFIG_FEATURE_VI_DOT_CMD
3516 end_cmd_q(); // stop adding to q
3517 #endif /* CONFIG_FEATURE_VI_DOT_CMD */
3519 case 'G': // G- goto to a line number (default= E-O-F)
3520 dot = end - 1; // assume E-O-F
3522 dot = find_line(cmdcnt); // what line is #cmdcnt
3526 case 'H': // H- goto top line on screen
3528 if (cmdcnt > (rows - 1)) {
3529 cmdcnt = (rows - 1);
3536 case 'I': // I- insert before first non-blank
3539 //**** fall thru to ... 'i'
3540 case 'i': // i- insert before current char
3541 case VI_K_INSERT: // Cursor Key Insert
3543 cmd_mode = 1; // start insrting
3545 case 'J': // J- join current and next lines together
3549 dot_end(); // move to NL
3550 if (dot < end - 1) { // make sure not last char in text[]
3551 *dot++ = ' '; // replace NL with space
3553 while (isblnk(*dot)) { // delete leading WS
3557 end_cmd_q(); // stop adding to q
3559 case 'L': // L- goto bottom line on screen
3561 if (cmdcnt > (rows - 1)) {
3562 cmdcnt = (rows - 1);
3570 case 'M': // M- goto middle line on screen
3572 for (cnt = 0; cnt < (rows-1) / 2; cnt++)
3573 dot = next_line(dot);
3575 case 'O': // O- open a empty line above
3577 p = begin_line(dot);
3578 if (p[-1] == '\n') {
3580 case 'o': // o- open a empty line below; Yes, I know it is in the middle of the "if (..."
3582 dot = char_insert(dot, '\n');
3585 dot = char_insert(dot, '\n'); // i\n ESC
3590 case 'R': // R- continuous Replace char
3594 case 'X': // X- delete char before dot
3595 case 'x': // x- delete the current char
3596 case 's': // s- substitute the current char
3603 if (dot[dir] != '\n') {
3605 dot--; // delete prev char
3606 dot = yank_delete(dot, dot, 0, YANKDEL); // delete char
3609 goto dc_i; // start insrting
3610 end_cmd_q(); // stop adding to q
3612 case 'Z': // Z- if modified, {write}; exit
3613 // ZZ means to save file (if necessary), then exit
3614 c1 = get_one_char();
3619 if (file_modified) {
3620 #ifdef CONFIG_FEATURE_VI_READONLY
3621 if (vi_readonly || readonly) {
3622 psbs("\"%s\" File is read only", cfn);
3625 #endif /* CONFIG_FEATURE_VI_READONLY */
3626 cnt = file_write(cfn, text, end - 1);
3629 psbs("Write error: %s", strerror(errno));
3630 } else if (cnt == (end - 1 - text + 1)) {
3637 case '^': // ^- move to first non-blank on line
3641 case 'b': // b- back a word
3642 case 'e': // e- end of word
3649 if ((dot + dir) < text || (dot + dir) > end - 1)
3652 if (isspace(*dot)) {
3653 dot = skip_thing(dot, (c == 'e') ? 2 : 1, dir, S_OVER_WS);
3655 if (isalnum(*dot) || *dot == '_') {
3656 dot = skip_thing(dot, 1, dir, S_END_ALNUM);
3657 } else if (ispunct(*dot)) {
3658 dot = skip_thing(dot, 1, dir, S_END_PUNCT);
3661 case 'c': // c- change something
3662 case 'd': // d- delete something
3663 #ifdef CONFIG_FEATURE_VI_YANKMARK
3664 case 'y': // y- yank something
3665 case 'Y': // Y- Yank a line
3666 #endif /* CONFIG_FEATURE_VI_YANKMARK */
3667 yf = YANKDEL; // assume either "c" or "d"
3668 #ifdef CONFIG_FEATURE_VI_YANKMARK
3669 if (c == 'y' || c == 'Y')
3671 #endif /* CONFIG_FEATURE_VI_YANKMARK */
3674 c1 = get_one_char(); // get the type of thing to delete
3675 find_range(&p, &q, c1);
3676 if (c1 == 27) { // ESC- user changed mind and wants out
3677 c = c1 = 27; // Escape- do nothing
3678 } else if (strchr("wW", c1)) {
3680 // don't include trailing WS as part of word
3681 while (isblnk(*q)) {
3682 if (q <= text || q[-1] == '\n')
3687 dot = yank_delete(p, q, 0, yf); // delete word
3688 } else if (strchr("^0bBeEft$", c1)) {
3689 // single line copy text into a register and delete
3690 dot = yank_delete(p, q, 0, yf); // delete word
3691 } else if (strchr("cdykjHL%+-{}\r\n", c1)) {
3692 // multiple line copy text into a register and delete
3693 dot = yank_delete(p, q, 1, yf); // delete lines
3695 dot = char_insert(dot, '\n');
3696 // on the last line of file don't move to prev line
3697 if (dot != (end-1)) {
3700 } else if (c == 'd') {
3705 // could not recognize object
3706 c = c1 = 27; // error-
3710 // if CHANGING, not deleting, start inserting after the delete
3712 strcpy((char *) buf, "Change");
3713 goto dc_i; // start inserting
3716 strcpy((char *) buf, "Delete");
3718 #ifdef CONFIG_FEATURE_VI_YANKMARK
3719 if (c == 'y' || c == 'Y') {
3720 strcpy((char *) buf, "Yank");
3723 q = p + strlen((char *) p);
3724 for (cnt = 0; p <= q; p++) {
3728 psb("%s %d lines (%d chars) using [%c]",
3729 buf, cnt, strlen((char *) reg[YDreg]), what_reg());
3730 #endif /* CONFIG_FEATURE_VI_YANKMARK */
3731 end_cmd_q(); // stop adding to q
3734 case 'k': // k- goto prev line, same col
3735 case VI_K_UP: // cursor key Up
3740 dot = move_to_col(dot, ccol + offset); // try stay in same col
3742 case 'r': // r- replace the current char with user input
3743 c1 = get_one_char(); // get the replacement char
3746 file_modified++; // has the file been modified
3748 end_cmd_q(); // stop adding to q
3750 case 't': // t- move to char prior to next x
3751 last_forward_char = get_one_char();
3753 if (*dot == last_forward_char)
3755 last_forward_char= 0;
3757 case 'w': // w- forward a word
3761 if (isalnum(*dot) || *dot == '_') { // we are on ALNUM
3762 dot = skip_thing(dot, 1, FORWARD, S_END_ALNUM);
3763 } else if (ispunct(*dot)) { // we are on PUNCT
3764 dot = skip_thing(dot, 1, FORWARD, S_END_PUNCT);
3767 dot++; // move over word
3768 if (isspace(*dot)) {
3769 dot = skip_thing(dot, 2, FORWARD, S_OVER_WS);
3773 c1 = get_one_char(); // get the replacement char
3776 cnt = (rows - 2) / 2; // put dot at center
3778 cnt = rows - 2; // put dot at bottom
3779 screenbegin = begin_line(dot); // start dot at top
3780 dot_scroll(cnt, -1);
3782 case '|': // |- move to column "cmdcnt"
3783 dot = move_to_col(dot, cmdcnt - 1); // try to move to column
3785 case '~': // ~- flip the case of letters a-z -> A-Z
3789 if (islower(*dot)) {
3790 *dot = toupper(*dot);
3791 file_modified++; // has the file been modified
3792 } else if (isupper(*dot)) {
3793 *dot = tolower(*dot);
3794 file_modified++; // has the file been modified
3797 end_cmd_q(); // stop adding to q
3799 //----- The Cursor and Function Keys -----------------------------
3800 case VI_K_HOME: // Cursor Key Home
3803 // The Fn keys could point to do_macro which could translate them
3804 case VI_K_FUN1: // Function Key F1
3805 case VI_K_FUN2: // Function Key F2
3806 case VI_K_FUN3: // Function Key F3
3807 case VI_K_FUN4: // Function Key F4
3808 case VI_K_FUN5: // Function Key F5
3809 case VI_K_FUN6: // Function Key F6
3810 case VI_K_FUN7: // Function Key F7
3811 case VI_K_FUN8: // Function Key F8
3812 case VI_K_FUN9: // Function Key F9
3813 case VI_K_FUN10: // Function Key F10
3814 case VI_K_FUN11: // Function Key F11
3815 case VI_K_FUN12: // Function Key F12
3820 // if text[] just became empty, add back an empty line
3822 (void) char_insert(text, '\n'); // start empty buf with dummy line
3825 // it is OK for dot to exactly equal to end, otherwise check dot validity
3827 dot = bound_dot(dot); // make sure "dot" is valid
3829 #ifdef CONFIG_FEATURE_VI_YANKMARK
3830 check_context(c); // update the current context
3831 #endif /* CONFIG_FEATURE_VI_YANKMARK */
3834 cmdcnt = 0; // cmd was not a number, reset cmdcnt
3835 cnt = dot - begin_line(dot);
3836 // Try to stay off of the Newline
3837 if (*dot == '\n' && cnt > 0 && cmd_mode == 0)
3841 #ifdef CONFIG_FEATURE_VI_CRASHME
3842 static int totalcmds = 0;
3843 static int Mp = 85; // Movement command Probability
3844 static int Np = 90; // Non-movement command Probability
3845 static int Dp = 96; // Delete command Probability
3846 static int Ip = 97; // Insert command Probability
3847 static int Yp = 98; // Yank command Probability
3848 static int Pp = 99; // Put command Probability
3849 static int M = 0, N = 0, I = 0, D = 0, Y = 0, P = 0, U = 0;
3850 char chars[20] = "\t012345 abcdABCD-=.$";
3851 char *words[20] = { "this", "is", "a", "test",
3852 "broadcast", "the", "emergency", "of",
3853 "system", "quick", "brown", "fox",
3854 "jumped", "over", "lazy", "dogs",
3855 "back", "January", "Febuary", "March"
3858 "You should have received a copy of the GNU General Public License\n",
3859 "char c, cm, *cmd, *cmd1;\n",
3860 "generate a command by percentages\n",
3861 "Numbers may be typed as a prefix to some commands.\n",
3862 "Quit, discarding changes!\n",
3863 "Forced write, if permission originally not valid.\n",
3864 "In general, any ex or ed command (such as substitute or delete).\n",
3865 "I have tickets available for the Blazers vs LA Clippers for Monday, Janurary 1 at 1:00pm.\n",
3866 "Please get w/ me and I will go over it with you.\n",
3867 "The following is a list of scheduled, committed changes.\n",
3868 "1. Launch Norton Antivirus (Start, Programs, Norton Antivirus)\n",
3869 "Reminder....Town Meeting in Central Perk cafe today at 3:00pm.\n",
3870 "Any question about transactions please contact Sterling Huxley.\n",
3871 "I will try to get back to you by Friday, December 31.\n",
3872 "This Change will be implemented on Friday.\n",
3873 "Let me know if you have problems accessing this;\n",
3874 "Sterling Huxley recently added you to the access list.\n",
3875 "Would you like to go to lunch?\n",
3876 "The last command will be automatically run.\n",
3877 "This is too much english for a computer geek.\n",
3879 char *multilines[20] = {
3880 "You should have received a copy of the GNU General Public License\n",
3881 "char c, cm, *cmd, *cmd1;\n",
3882 "generate a command by percentages\n",
3883 "Numbers may be typed as a prefix to some commands.\n",
3884 "Quit, discarding changes!\n",
3885 "Forced write, if permission originally not valid.\n",
3886 "In general, any ex or ed command (such as substitute or delete).\n",
3887 "I have tickets available for the Blazers vs LA Clippers for Monday, Janurary 1 at 1:00pm.\n",
3888 "Please get w/ me and I will go over it with you.\n",
3889 "The following is a list of scheduled, committed changes.\n",
3890 "1. Launch Norton Antivirus (Start, Programs, Norton Antivirus)\n",
3891 "Reminder....Town Meeting in Central Perk cafe today at 3:00pm.\n",
3892 "Any question about transactions please contact Sterling Huxley.\n",
3893 "I will try to get back to you by Friday, December 31.\n",
3894 "This Change will be implemented on Friday.\n",
3895 "Let me know if you have problems accessing this;\n",
3896 "Sterling Huxley recently added you to the access list.\n",
3897 "Would you like to go to lunch?\n",
3898 "The last command will be automatically run.\n",
3899 "This is too much english for a computer geek.\n",
3902 // create a random command to execute
3903 static void crash_dummy()
3905 static int sleeptime; // how long to pause between commands
3906 char c, cm, *cmd, *cmd1;
3907 int i, cnt, thing, rbi, startrbi, percent;
3909 // "dot" movement commands
3910 cmd1 = " \n\r\002\004\005\006\025\0310^$-+wWeEbBhjklHL";
3912 // is there already a command running?
3913 if (readed_for_parse > 0)
3917 sleeptime = 0; // how long to pause between commands
3918 memset(readbuffer, '\0', BUFSIZ); // clear the read buffer
3919 // generate a command by percentages
3920 percent = (int) lrand48() % 100; // get a number from 0-99
3921 if (percent < Mp) { // Movement commands
3922 // available commands
3925 } else if (percent < Np) { // non-movement commands
3926 cmd = "mz<>\'\""; // available commands
3928 } else if (percent < Dp) { // Delete commands
3929 cmd = "dx"; // available commands
3931 } else if (percent < Ip) { // Inset commands
3932 cmd = "iIaAsrJ"; // available commands
3934 } else if (percent < Yp) { // Yank commands
3935 cmd = "yY"; // available commands
3937 } else if (percent < Pp) { // Put commands
3938 cmd = "pP"; // available commands
3941 // We do not know how to handle this command, try again
3945 // randomly pick one of the available cmds from "cmd[]"
3946 i = (int) lrand48() % strlen(cmd);
3948 if (strchr(":\024", cm))
3949 goto cd0; // dont allow colon or ctrl-T commands
3950 readbuffer[rbi++] = cm; // put cmd into input buffer
3952 // now we have the command-
3953 // there are 1, 2, and multi char commands
3954 // find out which and generate the rest of command as necessary
3955 if (strchr("dmryz<>\'\"", cm)) { // 2-char commands
3956 cmd1 = " \n\r0$^-+wWeEbBhjklHL";
3957 if (cm == 'm' || cm == '\'' || cm == '\"') { // pick a reg[]
3958 cmd1 = "abcdefghijklmnopqrstuvwxyz";
3960 thing = (int) lrand48() % strlen(cmd1); // pick a movement command
3962 readbuffer[rbi++] = c; // add movement to input buffer
3964 if (strchr("iIaAsc", cm)) { // multi-char commands
3966 // change some thing
3967 thing = (int) lrand48() % strlen(cmd1); // pick a movement command
3969 readbuffer[rbi++] = c; // add movement to input buffer
3971 thing = (int) lrand48() % 4; // what thing to insert
3972 cnt = (int) lrand48() % 10; // how many to insert
3973 for (i = 0; i < cnt; i++) {
3974 if (thing == 0) { // insert chars
3975 readbuffer[rbi++] = chars[((int) lrand48() % strlen(chars))];
3976 } else if (thing == 1) { // insert words
3977 strcat((char *) readbuffer, words[(int) lrand48() % 20]);
3978 strcat((char *) readbuffer, " ");
3979 sleeptime = 0; // how fast to type
3980 } else if (thing == 2) { // insert lines
3981 strcat((char *) readbuffer, lines[(int) lrand48() % 20]);
3982 sleeptime = 0; // how fast to type
3983 } else { // insert multi-lines
3984 strcat((char *) readbuffer, multilines[(int) lrand48() % 20]);
3985 sleeptime = 0; // how fast to type
3988 strcat((char *) readbuffer, "\033");
3990 readed_for_parse = strlen(readbuffer);
3994 (void) mysleep(sleeptime); // sleep 1/100 sec
3997 // test to see if there are any errors
3998 static void crash_test()
4000 static time_t oldtim;
4002 char d[2], msg[BUFSIZ];
4006 strcat((char *) msg, "end<text ");
4008 if (end > textend) {
4009 strcat((char *) msg, "end>textend ");
4012 strcat((char *) msg, "dot<text ");
4015 strcat((char *) msg, "dot>end ");
4017 if (screenbegin < text) {
4018 strcat((char *) msg, "screenbegin<text ");
4020 if (screenbegin > end - 1) {
4021 strcat((char *) msg, "screenbegin>end-1 ");
4024 if (strlen(msg) > 0) {
4026 printf("\n\n%d: \'%c\' %s\n\n\n%s[Hit return to continue]%s",
4027 totalcmds, last_input_char, msg, SOs, SOn);
4029 while (read(0, d, 1) > 0) {
4030 if (d[0] == '\n' || d[0] == '\r')
4035 tim = (time_t) time((time_t *) 0);
4036 if (tim >= (oldtim + 3)) {
4037 sprintf((char *) status_buffer,
4038 "Tot=%d: M=%d N=%d I=%d D=%d Y=%d P=%d U=%d size=%d",
4039 totalcmds, M, N, I, D, Y, P, U, end - text + 1);
4044 #endif /* CONFIG_FEATURE_VI_CRASHME */