1 /* vi: set sw=4 ts=4: */
3 * tiny vi.c: A small 'vi' clone
4 * Copyright (C) 2000, 2001 Sterling Huxley <sterling@europa.com>
6 * Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
12 * $HOME/.exrc and ./.exrc
13 * add magic to search /foo.*bar
16 * if mark[] values were line numbers rather than pointers
17 * it would be easier to change the mark when add/delete lines
18 * More intelligence in refresh()
19 * ":r !cmd" and "!cmd" to filter text through an external command
20 * A true "undo" facility
21 * An "ex" line oriented mode- maybe using "cmdedit"
26 #define ENABLE_FEATURE_VI_CRASHME 0
28 #if ENABLE_LOCALE_SUPPORT
29 #define Isprint(c) isprint((c))
31 /* 0x9b is Meta-ESC */
32 #define Isprint(c) ((unsigned char)(c) >= ' ' && (c) != 0x7f && (unsigned char)(c) != 0x9b)
36 MAX_LINELEN = CONFIG_FEATURE_VI_MAX_LEN,
37 MAX_SCR_COLS = CONFIG_FEATURE_VI_MAX_LEN,
40 // Misc. non-Ascii keys that report an escape sequence
41 #define VI_K_UP (char)128 // cursor key Up
42 #define VI_K_DOWN (char)129 // cursor key Down
43 #define VI_K_RIGHT (char)130 // Cursor Key Right
44 #define VI_K_LEFT (char)131 // cursor key Left
45 #define VI_K_HOME (char)132 // Cursor Key Home
46 #define VI_K_END (char)133 // Cursor Key End
47 #define VI_K_INSERT (char)134 // Cursor Key Insert
48 #define VI_K_PAGEUP (char)135 // Cursor Key Page Up
49 #define VI_K_PAGEDOWN (char)136 // Cursor Key Page Down
50 #define VI_K_FUN1 (char)137 // Function Key F1
51 #define VI_K_FUN2 (char)138 // Function Key F2
52 #define VI_K_FUN3 (char)139 // Function Key F3
53 #define VI_K_FUN4 (char)140 // Function Key F4
54 #define VI_K_FUN5 (char)141 // Function Key F5
55 #define VI_K_FUN6 (char)142 // Function Key F6
56 #define VI_K_FUN7 (char)143 // Function Key F7
57 #define VI_K_FUN8 (char)144 // Function Key F8
58 #define VI_K_FUN9 (char)145 // Function Key F9
59 #define VI_K_FUN10 (char)146 // Function Key F10
60 #define VI_K_FUN11 (char)147 // Function Key F11
61 #define VI_K_FUN12 (char)148 // Function Key F12
63 /* vt102 typical ESC sequence */
64 /* terminal standout start/normal ESC sequence */
65 static const char SOs[] ALIGN1 = "\033[7m";
66 static const char SOn[] ALIGN1 = "\033[0m";
67 /* terminal bell sequence */
68 static const char bell[] ALIGN1 = "\007";
69 /* Clear-end-of-line and Clear-end-of-screen ESC sequence */
70 static const char Ceol[] ALIGN1 = "\033[0K";
71 static const char Ceos[] ALIGN1 = "\033[0J";
72 /* Cursor motion arbitrary destination ESC sequence */
73 static const char CMrc[] ALIGN1 = "\033[%d;%dH";
74 /* Cursor motion up and down ESC sequence */
75 static const char CMup[] ALIGN1 = "\033[A";
76 static const char CMdown[] ALIGN1 = "\n";
82 FORWARD = 1, // code depends on "1" for array index
83 BACK = -1, // code depends on "-1" for array index
84 LIMITED = 0, // how much of text[] in char_search
85 FULL = 1, // how much of text[] in char_search
87 S_BEFORE_WS = 1, // used in skip_thing() for moving "dot"
88 S_TO_WS = 2, // used in skip_thing() for moving "dot"
89 S_OVER_WS = 3, // used in skip_thing() for moving "dot"
90 S_END_PUNCT = 4, // used in skip_thing() for moving "dot"
91 S_END_ALNUM = 5, // used in skip_thing() for moving "dot"
94 /* vi.c expects chars to be unsigned. */
95 /* busybox build system provides that, but it's better */
96 /* to audit and fix the source */
98 static smallint vi_setops;
99 #define VI_AUTOINDENT 1
100 #define VI_SHOWMATCH 2
101 #define VI_IGNORECASE 4
102 #define VI_ERR_METHOD 8
103 #define autoindent (vi_setops & VI_AUTOINDENT)
104 #define showmatch (vi_setops & VI_SHOWMATCH )
105 #define ignorecase (vi_setops & VI_IGNORECASE)
106 /* indicate error with beep or flash */
107 #define err_method (vi_setops & VI_ERR_METHOD)
110 static smallint editing; // >0 while we are editing a file
111 // [code audit says "can be 0 or 1 only"]
112 static smallint cmd_mode; // 0=command 1=insert 2=replace
113 static smallint file_modified; // buffer contents changed
114 static smallint last_file_modified = -1;
115 static int fn_start; // index of first cmd line file name
116 static int save_argc; // how many file names on cmd line
117 static int cmdcnt; // repetition count
118 static int rows, columns; // the terminal screen is this size
119 static int crow, ccol, offset; // cursor is on Crow x Ccol with Horz Ofset
120 static char *status_buffer; // mesages to the user
121 #define STATUS_BUFFER_LEN 200
122 static int have_status_msg; // is default edit status needed?
123 // [don't make smallint!]
124 static int last_status_cksum; // hash of current status line
125 static char *current_filename; // current file name
126 //static char *text, *end; // pointers to the user data in memory
127 static char *screen; // pointer to the virtual screen buffer
128 static int screensize; // and its size
129 static char *screenbegin; // index into text[], of top line on the screen
130 //static char *dot; // where all the action takes place
132 static char erase_char; // the users erase character
133 static char last_input_char; // last char read from user
134 static char last_forward_char; // last char searched for with 'f'
136 #if ENABLE_FEATURE_VI_READONLY
137 //static smallint vi_readonly, readonly;
138 static smallint readonly_mode = 0;
139 #define SET_READONLY_FILE(flags) ((flags) |= 0x01)
140 #define SET_READONLY_MODE(flags) ((flags) |= 0x02)
141 #define UNSET_READONLY_FILE(flags) ((flags) &= 0xfe)
143 #define readonly_mode 0
144 #define SET_READONLY_FILE(flags)
145 #define SET_READONLY_MODE(flags)
146 #define UNSET_READONLY_FILE(flags)
149 #if ENABLE_FEATURE_VI_DOT_CMD
150 static smallint adding2q; // are we currently adding user input to q
151 static char *last_modifying_cmd; // last modifying cmd for "."
152 static char *ioq, *ioq_start; // pointer to string for get_one_char to "read"
154 #if ENABLE_FEATURE_VI_OPTIMIZE_CURSOR
155 static int last_row; // where the cursor was last moved to
157 #if ENABLE_FEATURE_VI_USE_SIGNALS || ENABLE_FEATURE_VI_CRASHME
160 #if ENABLE_FEATURE_VI_DOT_CMD || ENABLE_FEATURE_VI_YANKMARK
161 static char *modifying_cmds; // cmds that modify text[]
163 #if ENABLE_FEATURE_VI_SEARCH
164 static char *last_search_pattern; // last pattern from a '/' or '?' search
167 /* Moving biggest data to malloced space... */
169 /* many references - keep near the top of globals */
170 char *text, *end; // pointers to the user data in memory
171 int text_size; // size of the allocated buffer
172 char *dot; // where all the action takes place
173 #if ENABLE_FEATURE_VI_YANKMARK
174 char *reg[28]; // named register a-z, "D", and "U" 0-25,26,27
175 int YDreg, Ureg; // default delete register and orig line for "U"
176 char *mark[28]; // user marks points somewhere in text[]- a-z and previous context ''
177 char *context_start, *context_end;
179 /* a few references only */
180 #if ENABLE_FEATURE_VI_USE_SIGNALS
181 jmp_buf restart; // catch_sig()
183 struct termios term_orig, term_vi; // remember what the cooked mode was
184 #if ENABLE_FEATURE_VI_COLON
185 char *initial_cmds[3]; // currently 2 entries, NULL terminated
188 #define G (*ptr_to_globals)
189 #define text (G.text )
190 #define text_size (G.text_size )
194 #define YDreg (G.YDreg )
195 #define Ureg (G.Ureg )
196 #define mark (G.mark )
197 #define context_start (G.context_start )
198 #define context_end (G.context_end )
199 #define restart (G.restart )
200 #define term_orig (G.term_orig )
201 #define term_vi (G.term_vi )
202 #define initial_cmds (G.initial_cmds )
204 static int init_text_buffer(char *); // init from file or create new
205 static void edit_file(char *); // edit one file
206 static void do_cmd(char); // execute a command
207 static int next_tabstop(int);
208 static void sync_cursor(char *, int *, int *); // synchronize the screen cursor to dot
209 static char *begin_line(char *); // return pointer to cur line B-o-l
210 static char *end_line(char *); // return pointer to cur line E-o-l
211 static char *prev_line(char *); // return pointer to prev line B-o-l
212 static char *next_line(char *); // return pointer to next line B-o-l
213 static char *end_screen(void); // get pointer to last char on screen
214 static int count_lines(char *, char *); // count line from start to stop
215 static char *find_line(int); // find begining of line #li
216 static char *move_to_col(char *, int); // move "p" to column l
217 static void dot_left(void); // move dot left- dont leave line
218 static void dot_right(void); // move dot right- dont leave line
219 static void dot_begin(void); // move dot to B-o-l
220 static void dot_end(void); // move dot to E-o-l
221 static void dot_next(void); // move dot to next line B-o-l
222 static void dot_prev(void); // move dot to prev line B-o-l
223 static void dot_scroll(int, int); // move the screen up or down
224 static void dot_skip_over_ws(void); // move dot pat WS
225 static void dot_delete(void); // delete the char at 'dot'
226 static char *bound_dot(char *); // make sure text[0] <= P < "end"
227 static char *new_screen(int, int); // malloc virtual screen memory
228 static char *char_insert(char *, char); // insert the char c at 'p'
229 static char *stupid_insert(char *, char); // stupidly insert the char c at 'p'
230 static char find_range(char **, char **, char); // return pointers for an object
231 static int st_test(char *, int, int, char *); // helper for skip_thing()
232 static char *skip_thing(char *, int, int, int); // skip some object
233 static char *find_pair(char *, char); // find matching pair () [] {}
234 static char *text_hole_delete(char *, char *); // at "p", delete a 'size' byte hole
235 static char *text_hole_make(char *, int); // at "p", make a 'size' byte hole
236 static char *yank_delete(char *, char *, int, int); // yank text[] into register then delete
237 static void show_help(void); // display some help info
238 static void rawmode(void); // set "raw" mode on tty
239 static void cookmode(void); // return to "cooked" mode on tty
240 // sleep for 'h' 1/100 seconds, return 1/0 if stdin is (ready for read)/(not ready)
241 static int mysleep(int);
242 static char readit(void); // read (maybe cursor) key from stdin
243 static char get_one_char(void); // read 1 char from stdin
244 static int file_size(const char *); // what is the byte size of "fn"
245 #if ENABLE_FEATURE_VI_READONLY
246 static int file_insert(const char *, char *, int);
248 static int file_insert(const char *, char *);
250 static int file_write(char *, char *, char *);
251 static void place_cursor(int, int, int);
252 static void screen_erase(void);
253 static void clear_to_eol(void);
254 static void clear_to_eos(void);
255 static void standout_start(void); // send "start reverse video" sequence
256 static void standout_end(void); // send "end reverse video" sequence
257 static void flash(int); // flash the terminal screen
258 static void show_status_line(void); // put a message on the bottom line
259 static void psb(const char *, ...); // Print Status Buf
260 static void psbs(const char *, ...); // Print Status Buf in standout mode
261 static void ni(const char *); // display messages
262 static int format_edit_status(void); // format file status on status line
263 static void redraw(int); // force a full screen refresh
264 static void format_line(char*, char*, int);
265 static void refresh(int); // update the terminal from screen[]
267 static void Indicate_Error(void); // use flash or beep to indicate error
268 #define indicate_error(c) Indicate_Error()
269 static void Hit_Return(void);
271 #if ENABLE_FEATURE_VI_SEARCH
272 static char *char_search(char *, const char *, int, int); // search for pattern starting at p
273 static int mycmp(const char *, const char *, int); // string cmp based in "ignorecase"
275 #if ENABLE_FEATURE_VI_COLON
276 static char *get_one_address(char *, int *); // get colon addr, if present
277 static char *get_address(char *, int *, int *); // get two colon addrs, if present
278 static void colon(char *); // execute the "colon" mode cmds
280 #if ENABLE_FEATURE_VI_USE_SIGNALS
281 static void winch_sig(int); // catch window size changes
282 static void suspend_sig(int); // catch ctrl-Z
283 static void catch_sig(int); // catch ctrl-C and alarm time-outs
285 #if ENABLE_FEATURE_VI_DOT_CMD
286 static void start_new_cmd_q(char); // new queue for command
287 static void end_cmd_q(void); // stop saving input chars
289 #define end_cmd_q() ((void)0)
291 #if ENABLE_FEATURE_VI_SETOPTS
292 static void showmatching(char *); // show the matching pair () [] {}
294 #if ENABLE_FEATURE_VI_YANKMARK || (ENABLE_FEATURE_VI_COLON && ENABLE_FEATURE_VI_SEARCH) || ENABLE_FEATURE_VI_CRASHME
295 static char *string_insert(char *, char *); // insert the string at 'p'
297 #if ENABLE_FEATURE_VI_YANKMARK
298 static char *text_yank(char *, char *, int); // save copy of "p" into a register
299 static char what_reg(void); // what is letter of current YDreg
300 static void check_context(char); // remember context for '' command
302 #if ENABLE_FEATURE_VI_CRASHME
303 static void crash_dummy();
304 static void crash_test();
305 static int crashme = 0;
309 static void write1(const char *out)
314 int vi_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
315 int vi_main(int argc, char **argv)
318 RESERVE_CONFIG_BUFFER(STATUS_BUFFER, STATUS_BUFFER_LEN);
320 #if ENABLE_FEATURE_VI_USE_SIGNALS || ENABLE_FEATURE_VI_CRASHME
324 PTR_TO_GLOBALS = xzalloc(sizeof(G));
326 #if ENABLE_FEATURE_VI_CRASHME
327 srand((long) my_pid);
330 status_buffer = STATUS_BUFFER;
331 last_status_cksum = 0;
334 #ifdef NO_SUCH_APPLET_YET
335 /* If we aren't "vi", we are "view" */
336 if (ENABLE_FEATURE_VI_READONLY && applet_name[2]) {
337 SET_READONLY_MODE(readonly_mode);
341 vi_setops = VI_AUTOINDENT | VI_SHOWMATCH | VI_IGNORECASE;
342 #if ENABLE_FEATURE_VI_YANKMARK
343 memset(reg, 0, sizeof(reg)); // init the yank regs
345 #if ENABLE_FEATURE_VI_DOT_CMD || ENABLE_FEATURE_VI_YANKMARK
346 modifying_cmds = (char *) "aAcCdDiIJoOpPrRsxX<>~"; // cmds modifying text[]
349 // 1- process $HOME/.exrc file (not inplemented yet)
350 // 2- process EXINIT variable from environment
351 // 3- process command line args
352 #if ENABLE_FEATURE_VI_COLON
354 char *p = getenv("EXINIT");
356 initial_cmds[0] = xstrdup(p);
359 while ((c = getopt(argc, argv, "hCR" USE_FEATURE_VI_COLON("c:"))) != -1) {
361 #if ENABLE_FEATURE_VI_CRASHME
366 #if ENABLE_FEATURE_VI_READONLY
367 case 'R': // Read-only flag
368 SET_READONLY_MODE(readonly_mode);
371 //case 'r': // recover flag- ignore- we don't use tmp file
372 //case 'x': // encryption flag- ignore
373 //case 'c': // execute command first
374 #if ENABLE_FEATURE_VI_COLON
375 case 'c': // cmd line vi command
377 initial_cmds[initial_cmds[0] != 0] = xstrdup(optarg);
379 //case 'h': // help -- just use default
387 // The argv array can be used by the ":next" and ":rewind" commands
389 fn_start = optind; // remember first file name for :next and :rew
392 //----- This is the main file handling loop --------------
393 if (optind >= argc) {
396 for (; optind < argc; optind++) {
397 edit_file(argv[optind]);
400 //-----------------------------------------------------------
405 /* read text from file or create an empty buf */
406 /* will also update current_filename */
407 static int init_text_buffer(char *fn)
410 int size = file_size(fn); // file size. -1 means does not exist.
412 /* allocate/reallocate text buffer */
414 text_size = size * 2;
415 if (text_size < 10240)
416 text_size = 10240; // have a minimum size for new files
417 screenbegin = dot = end = text = xzalloc(text_size);
419 if (fn != current_filename) {
420 free(current_filename);
421 current_filename = xstrdup(fn);
424 // file dont exist. Start empty buf with dummy line
425 char_insert(text, '\n');
428 rc = file_insert(fn, text
429 USE_FEATURE_VI_READONLY(, 1));
432 last_file_modified = -1;
433 #if ENABLE_FEATURE_VI_YANKMARK
434 /* init the marks. */
435 memset(mark, 0, sizeof(mark));
440 static void edit_file(char * fn)
445 #if ENABLE_FEATURE_VI_USE_SIGNALS
448 #if ENABLE_FEATURE_VI_YANKMARK
449 static char *cur_line;
452 editing = 1; // 0= exit, 1= one file, 2= multiple files
457 if (ENABLE_FEATURE_VI_WIN_RESIZE)
458 get_terminal_width_height(0, &columns, &rows);
459 new_screen(rows, columns); // get memory for virtual screen
460 init_text_buffer(fn);
462 #if ENABLE_FEATURE_VI_YANKMARK
463 YDreg = 26; // default Yank/Delete reg
464 Ureg = 27; // hold orig line for "U" cmd
465 mark[26] = mark[27] = text; // init "previous context"
468 last_forward_char = last_input_char = '\0';
472 #if ENABLE_FEATURE_VI_USE_SIGNALS
474 signal(SIGWINCH, winch_sig);
475 signal(SIGTSTP, suspend_sig);
476 sig = setjmp(restart);
478 screenbegin = dot = text;
482 cmd_mode = 0; // 0=command 1=insert 2='R'eplace
485 offset = 0; // no horizontal offset
487 #if ENABLE_FEATURE_VI_DOT_CMD
488 free(last_modifying_cmd);
490 ioq = ioq_start = last_modifying_cmd = NULL;
493 redraw(FALSE); // dont force every col re-draw
495 #if ENABLE_FEATURE_VI_COLON
500 while ((p = initial_cmds[n])) {
510 free(initial_cmds[n]);
511 initial_cmds[n] = NULL;
516 //------This is the main Vi cmd handling loop -----------------------
517 while (editing > 0) {
518 #if ENABLE_FEATURE_VI_CRASHME
520 if ((end - text) > 1) {
521 crash_dummy(); // generate a random command
524 dot = string_insert(text, "\n\n##### Ran out of text to work on. #####\n\n"); // insert the string
529 last_input_char = c = get_one_char(); // get a cmd from user
530 #if ENABLE_FEATURE_VI_YANKMARK
531 // save a copy of the current line- for the 'U" command
532 if (begin_line(dot) != cur_line) {
533 cur_line = begin_line(dot);
534 text_yank(begin_line(dot), end_line(dot), Ureg);
537 #if ENABLE_FEATURE_VI_DOT_CMD
538 // These are commands that change text[].
539 // Remember the input for the "." command
540 if (!adding2q && ioq_start == 0
541 && strchr(modifying_cmds, c)
546 do_cmd(c); // execute the user command
548 // poll to see if there is input already waiting. if we are
549 // not able to display output fast enough to keep up, skip
550 // the display update until we catch up with input.
551 if (mysleep(0) == 0) {
552 // no input pending- so update output
556 #if ENABLE_FEATURE_VI_CRASHME
558 crash_test(); // test editor variables
561 //-------------------------------------------------------------------
563 place_cursor(rows, 0, FALSE); // go to bottom of screen
564 clear_to_eol(); // Erase to end of line
568 //----- The Colon commands -------------------------------------
569 #if ENABLE_FEATURE_VI_COLON
570 static char *get_one_address(char * p, int *addr) // get colon addr, if present
575 #if ENABLE_FEATURE_VI_YANKMARK
578 #if ENABLE_FEATURE_VI_SEARCH
579 char *pat, buf[MAX_LINELEN];
582 *addr = -1; // assume no addr
583 if (*p == '.') { // the current line
586 *addr = count_lines(text, q);
587 #if ENABLE_FEATURE_VI_YANKMARK
588 } else if (*p == '\'') { // is this a mark addr
592 if (c >= 'a' && c <= 'z') {
595 q = mark[(unsigned char) c];
596 if (q != NULL) { // is mark valid
597 *addr = count_lines(text, q); // count lines
601 #if ENABLE_FEATURE_VI_SEARCH
602 } else if (*p == '/') { // a search pattern
610 pat = xstrdup(buf); // save copy of pattern
613 q = char_search(dot, pat, FORWARD, FULL);
615 *addr = count_lines(text, q);
619 } else if (*p == '$') { // the last line in file
621 q = begin_line(end - 1);
622 *addr = count_lines(text, q);
623 } else if (isdigit(*p)) { // specific line number
624 sscanf(p, "%d%n", addr, &st);
626 } else { // I don't reconise this
627 // unrecognised address- assume -1
633 static char *get_address(char *p, int *b, int *e) // get two colon addrs, if present
635 //----- get the address' i.e., 1,3 'a,'b -----
636 // get FIRST addr, if present
638 p++; // skip over leading spaces
639 if (*p == '%') { // alias for 1,$
642 *e = count_lines(text, end-1);
645 p = get_one_address(p, b);
648 if (*p == ',') { // is there a address separator
652 // get SECOND addr, if present
653 p = get_one_address(p, e);
657 p++; // skip over trailing spaces
661 #if ENABLE_FEATURE_VI_SET && ENABLE_FEATURE_VI_SETOPTS
662 static void setops(const char *args, const char *opname, int flg_no,
663 const char *short_opname, int opt)
665 const char *a = args + flg_no;
666 int l = strlen(opname) - 1; /* opname have + ' ' */
668 if (strncasecmp(a, opname, l) == 0
669 || strncasecmp(a, short_opname, 2) == 0
679 static void colon(char * buf)
681 char c, *orig_buf, *buf1, *q, *r;
682 char *fn, cmd[MAX_LINELEN], args[MAX_LINELEN];
683 int i, l, li, ch, b, e;
684 int useforce = FALSE, forced = FALSE;
686 // :3154 // if (-e line 3154) goto it else stay put
687 // :4,33w! foo // write a portion of buffer to file "foo"
688 // :w // write all of buffer to current file
690 // :q! // quit- dont care about modified file
691 // :'a,'z!sort -u // filter block through sort
692 // :'f // goto mark "f"
693 // :'fl // list literal the mark "f" line
694 // :.r bar // read file "bar" into buffer before dot
695 // :/123/,/abc/d // delete lines from "123" line to "abc" line
696 // :/xyz/ // goto the "xyz" line
697 // :s/find/replace/ // substitute pattern "find" with "replace"
698 // :!<cmd> // run <cmd> then return
704 buf++; // move past the ':'
708 q = text; // assume 1,$ for the range
710 li = count_lines(text, end - 1);
711 fn = current_filename; // default to current file
712 memset(cmd, '\0', MAX_LINELEN); // clear cmd[]
713 memset(args, '\0', MAX_LINELEN); // clear args[]
715 // look for optional address(es) :. :1 :1,9 :'q,'a :%
716 buf = get_address(buf, &b, &e);
718 // remember orig command line
721 // get the COMMAND into cmd[]
723 while (*buf != '\0') {
729 while (isblank(*buf))
732 buf1 = last_char_is(cmd, '!');
735 *buf1 = '\0'; // get rid of !
738 // if there is only one addr, then the addr
739 // is the line number of the single line the
740 // user wants. So, reset the end
741 // pointer to point at end of the "b" line
742 q = find_line(b); // what line is #b
747 // we were given two addrs. change the
748 // end pointer to the addr given by user.
749 r = find_line(e); // what line is #e
753 // ------------ now look for the command ------------
755 if (i == 0) { // :123CR goto line #123
757 dot = find_line(b); // what line is #b
761 #if ENABLE_FEATURE_ALLOW_EXEC
762 else if (strncmp(cmd, "!", 1) == 0) { // run a cmd
764 // :!ls run the <cmd>
765 alarm(0); // wait for input- no alarms
766 place_cursor(rows - 1, 0, FALSE); // go to Status line
767 clear_to_eol(); // clear the line
769 retcode = system(orig_buf + 1); // run the cmd
771 printf("\nshell returned %i\n\n", retcode);
773 Hit_Return(); // let user see results
774 alarm(3); // done waiting for input
777 else if (strncmp(cmd, "=", i) == 0) { // where is the address
778 if (b < 0) { // no addr given- use defaults
779 b = e = count_lines(text, dot);
782 } else if (strncasecmp(cmd, "delete", i) == 0) { // delete lines
783 if (b < 0) { // no addr given- use defaults
784 q = begin_line(dot); // assume .,. for the range
787 dot = yank_delete(q, r, 1, YANKDEL); // save, then delete lines
789 } else if (strncasecmp(cmd, "edit", i) == 0) { // Edit a file
790 // don't edit, if the current file has been modified
791 if (file_modified && ! useforce) {
792 psbs("No write since last change (:edit! overrides)");
796 // the user supplied a file name
798 } else if (current_filename && current_filename[0]) {
799 // no user supplied name- use the current filename
800 // fn = current_filename; was set by default
802 // no user file name, no current name- punt
803 psbs("No current filename");
807 if (init_text_buffer(fn) < 0)
810 #if ENABLE_FEATURE_VI_YANKMARK
811 if (Ureg >= 0 && Ureg < 28 && reg[Ureg] != 0) {
812 free(reg[Ureg]); // free orig line reg- for 'U'
815 if (YDreg >= 0 && YDreg < 28 && reg[YDreg] != 0) {
816 free(reg[YDreg]); // free default yank/delete register
820 // how many lines in text[]?
821 li = count_lines(text, end - 1);
823 USE_FEATURE_VI_READONLY("%s")
824 " %dL, %dC", current_filename,
825 (file_size(fn) < 0 ? " [New file]" : ""),
826 USE_FEATURE_VI_READONLY(
827 ((readonly_mode) ? " [Readonly]" : ""),
830 } else if (strncasecmp(cmd, "file", i) == 0) { // what File is this
831 if (b != -1 || e != -1) {
832 ni("No address allowed on this command");
836 // user wants a new filename
837 free(current_filename);
838 current_filename = xstrdup(args);
840 // user wants file status info
841 last_status_cksum = 0; // force status update
843 } else if (strncasecmp(cmd, "features", i) == 0) { // what features are available
844 // print out values of all features
845 place_cursor(rows - 1, 0, FALSE); // go to Status line, bottom of screen
846 clear_to_eol(); // clear the line
851 } else if (strncasecmp(cmd, "list", i) == 0) { // literal print line
852 if (b < 0) { // no addr given- use defaults
853 q = begin_line(dot); // assume .,. for the range
856 place_cursor(rows - 1, 0, FALSE); // go to Status line, bottom of screen
857 clear_to_eol(); // clear the line
859 for (; q <= r; q++) {
863 c_is_no_print = (c & 0x80) && !Isprint(c);
870 } else if (c < ' ' || c == 127) {
881 #if ENABLE_FEATURE_VI_SET
885 } else if (strncasecmp(cmd, "quit", i) == 0 // Quit
886 || strncasecmp(cmd, "next", i) == 0 // edit next file
889 // force end of argv list
896 // don't exit if the file been modified
898 psbs("No write since last change (:%s! overrides)",
899 (*cmd == 'q' ? "quit" : "next"));
902 // are there other file to edit
903 if (*cmd == 'q' && optind < save_argc - 1) {
904 psbs("%d more file to edit", (save_argc - optind - 1));
907 if (*cmd == 'n' && optind >= save_argc - 1) {
908 psbs("No more files to edit");
912 } else if (strncasecmp(cmd, "read", i) == 0) { // read file into text[]
915 psbs("No filename given");
918 if (b < 0) { // no addr given- use defaults
919 q = begin_line(dot); // assume "dot"
921 // read after current line- unless user said ":0r foo"
924 ch = file_insert(fn, q USE_FEATURE_VI_READONLY(, 0));
926 goto vc1; // nothing was inserted
927 // how many lines in text[]?
928 li = count_lines(q, q + ch - 1);
930 USE_FEATURE_VI_READONLY("%s")
932 USE_FEATURE_VI_READONLY((readonly_mode ? " [Readonly]" : ""),)
935 // if the insert is before "dot" then we need to update
940 } else if (strncasecmp(cmd, "rewind", i) == 0) { // rewind cmd line args
941 if (file_modified && ! useforce) {
942 psbs("No write since last change (:rewind! overrides)");
944 // reset the filenames to edit
945 optind = fn_start - 1;
948 #if ENABLE_FEATURE_VI_SET
949 } else if (strncasecmp(cmd, "set", i) == 0) { // set or clear features
950 #if ENABLE_FEATURE_VI_SETOPTS
953 i = 0; // offset into args
954 // only blank is regarded as args delmiter. What about tab '\t' ?
955 if (!args[0] || strcasecmp(args, "all") == 0) {
956 // print out values of all options
957 place_cursor(rows - 1, 0, FALSE); // go to Status line, bottom of screen
958 clear_to_eol(); // clear the line
959 printf("----------------------------------------\r\n");
960 #if ENABLE_FEATURE_VI_SETOPTS
963 printf("autoindent ");
969 printf("ignorecase ");
972 printf("showmatch ");
973 printf("tabstop=%d ", tabstop);
978 #if ENABLE_FEATURE_VI_SETOPTS
981 if (strncasecmp(argp, "no", 2) == 0)
982 i = 2; // ":set noautoindent"
983 setops(argp, "autoindent ", i, "ai", VI_AUTOINDENT);
984 setops(argp, "flash ", i, "fl", VI_ERR_METHOD);
985 setops(argp, "ignorecase ", i, "ic", VI_IGNORECASE);
986 setops(argp, "showmatch ", i, "ic", VI_SHOWMATCH);
988 if (strncasecmp(argp + i, "tabstop=%d ", 7) == 0) {
989 sscanf(strchr(argp + i, '='), "tabstop=%d" + 7, &ch);
990 if (ch > 0 && ch < columns - 1)
993 while (*argp && *argp != ' ')
994 argp++; // skip to arg delimiter (i.e. blank)
995 while (*argp && *argp == ' ')
996 argp++; // skip all delimiting blanks
998 #endif /* FEATURE_VI_SETOPTS */
999 #endif /* FEATURE_VI_SET */
1000 #if ENABLE_FEATURE_VI_SEARCH
1001 } else if (strncasecmp(cmd, "s", 1) == 0) { // substitute a pattern with a replacement pattern
1005 // F points to the "find" pattern
1006 // R points to the "replace" pattern
1007 // replace the cmd line delimiters "/" with NULLs
1008 gflag = 0; // global replace flag
1009 c = orig_buf[1]; // what is the delimiter
1010 F = orig_buf + 2; // start of "find"
1011 R = strchr(F, c); // middle delimiter
1012 if (!R) goto colon_s_fail;
1013 *R++ = '\0'; // terminate "find"
1014 buf1 = strchr(R, c);
1015 if (!buf1) goto colon_s_fail;
1016 *buf1++ = '\0'; // terminate "replace"
1017 if (*buf1 == 'g') { // :s/foo/bar/g
1019 gflag++; // turn on gflag
1022 if (b < 0) { // maybe :s/foo/bar/
1023 q = begin_line(dot); // start with cur line
1024 b = count_lines(text, q); // cur line number
1027 e = b; // maybe :.s/foo/bar/
1028 for (i = b; i <= e; i++) { // so, :20,23 s \0 find \0 replace \0
1029 ls = q; // orig line start
1031 buf1 = char_search(q, F, FORWARD, LIMITED); // search cur line only for "find"
1033 // we found the "find" pattern - delete it
1034 text_hole_delete(buf1, buf1 + strlen(F) - 1);
1035 // inset the "replace" patern
1036 string_insert(buf1, R); // insert the string
1037 // check for "global" :s/foo/bar/g
1039 if ((buf1 + strlen(R)) < end_line(ls)) {
1040 q = buf1 + strlen(R);
1041 goto vc4; // don't let q move past cur line
1047 #endif /* FEATURE_VI_SEARCH */
1048 } else if (strncasecmp(cmd, "version", i) == 0) { // show software version
1049 psb("%s", BB_VER " " BB_BT);
1050 } else if (strncasecmp(cmd, "write", i) == 0 // write text to file
1051 || strncasecmp(cmd, "wq", i) == 0
1052 || strncasecmp(cmd, "wn", i) == 0
1053 || strncasecmp(cmd, "x", i) == 0
1055 // is there a file name to write to?
1059 #if ENABLE_FEATURE_VI_READONLY
1060 if (readonly_mode && !useforce) {
1061 psbs("\"%s\" File is read only", fn);
1065 // how many lines in text[]?
1066 li = count_lines(q, r);
1068 // see if file exists- if not, its just a new file request
1070 // if "fn" is not write-able, chmod u+w
1071 // sprintf(syscmd, "chmod u+w %s", fn);
1075 l = file_write(fn, q, r);
1076 if (useforce && forced) {
1078 // sprintf(syscmd, "chmod u-w %s", fn);
1084 psbs("\"%s\" %s", fn, strerror(errno));
1086 psb("\"%s\" %dL, %dC", fn, li, l);
1087 if (q == text && r == end - 1 && l == ch) {
1089 last_file_modified = -1;
1091 if ((cmd[0] == 'x' || cmd[1] == 'q' || cmd[1] == 'n' ||
1092 cmd[0] == 'X' || cmd[1] == 'Q' || cmd[1] == 'N')
1097 #if ENABLE_FEATURE_VI_READONLY
1100 #if ENABLE_FEATURE_VI_YANKMARK
1101 } else if (strncasecmp(cmd, "yank", i) == 0) { // yank lines
1102 if (b < 0) { // no addr given- use defaults
1103 q = begin_line(dot); // assume .,. for the range
1106 text_yank(q, r, YDreg);
1107 li = count_lines(q, r);
1108 psb("Yank %d lines (%d chars) into [%c]",
1109 li, strlen(reg[YDreg]), what_reg());
1116 dot = bound_dot(dot); // make sure "dot" is valid
1118 #if ENABLE_FEATURE_VI_SEARCH
1120 psb(":s expression missing delimiters");
1124 #endif /* FEATURE_VI_COLON */
1126 static void Hit_Return(void)
1130 standout_start(); // start reverse video
1131 write1("[Hit return to continue]");
1132 standout_end(); // end reverse video
1133 while ((c = get_one_char()) != '\n' && c != '\r') /*do nothing */
1135 redraw(TRUE); // force redraw all
1138 static int next_tabstop(int col)
1140 return col + ((tabstop - 1) - (col % tabstop));
1143 //----- Synchronize the cursor to Dot --------------------------
1144 static void sync_cursor(char * d, int *row, int *col)
1146 char *beg_cur; // begin and end of "d" line
1147 char *end_scr; // begin and end of screen
1151 beg_cur = begin_line(d); // first char of cur line
1153 end_scr = end_screen(); // last char of screen
1155 if (beg_cur < screenbegin) {
1156 // "d" is before top line on screen
1157 // how many lines do we have to move
1158 cnt = count_lines(beg_cur, screenbegin);
1160 screenbegin = beg_cur;
1161 if (cnt > (rows - 1) / 2) {
1162 // we moved too many lines. put "dot" in middle of screen
1163 for (cnt = 0; cnt < (rows - 1) / 2; cnt++) {
1164 screenbegin = prev_line(screenbegin);
1167 } else if (beg_cur > end_scr) {
1168 // "d" is after bottom line on screen
1169 // how many lines do we have to move
1170 cnt = count_lines(end_scr, beg_cur);
1171 if (cnt > (rows - 1) / 2)
1172 goto sc1; // too many lines
1173 for (ro = 0; ro < cnt - 1; ro++) {
1174 // move screen begin the same amount
1175 screenbegin = next_line(screenbegin);
1176 // now, move the end of screen
1177 end_scr = next_line(end_scr);
1178 end_scr = end_line(end_scr);
1181 // "d" is on screen- find out which row
1183 for (ro = 0; ro < rows - 1; ro++) { // drive "ro" to correct row
1189 // find out what col "d" is on
1191 do { // drive "co" to correct column
1192 if (*tp == '\n' || *tp == '\0')
1195 if (d == tp && cmd_mode) { /* handle tabs like real vi */
1198 co = next_tabstop(co);
1200 } else if (*tp < ' ' || *tp == 127) {
1201 co++; // display as ^X, use 2 columns
1203 } while (tp++ < d && ++co);
1205 // "co" is the column where "dot" is.
1206 // The screen has "columns" columns.
1207 // The currently displayed columns are 0+offset -- columns+ofset
1208 // |-------------------------------------------------------------|
1210 // offset | |------- columns ----------------|
1212 // If "co" is already in this range then we do not have to adjust offset
1213 // but, we do have to subtract the "offset" bias from "co".
1214 // If "co" is outside this range then we have to change "offset".
1215 // If the first char of a line is a tab the cursor will try to stay
1216 // in column 7, but we have to set offset to 0.
1218 if (co < 0 + offset) {
1221 if (co >= columns + offset) {
1222 offset = co - columns + 1;
1224 // if the first char of the line is a tab, and "dot" is sitting on it
1225 // force offset to 0.
1226 if (d == beg_cur && *d == '\t') {
1235 //----- Text Movement Routines ---------------------------------
1236 static char *begin_line(char * p) // return pointer to first char cur line
1238 while (p > text && p[-1] != '\n')
1239 p--; // go to cur line B-o-l
1243 static char *end_line(char * p) // return pointer to NL of cur line line
1245 while (p < end - 1 && *p != '\n')
1246 p++; // go to cur line E-o-l
1250 static inline char *dollar_line(char * p) // return pointer to just before NL line
1252 while (p < end - 1 && *p != '\n')
1253 p++; // go to cur line E-o-l
1254 // Try to stay off of the Newline
1255 if (*p == '\n' && (p - begin_line(p)) > 0)
1260 static char *prev_line(char * p) // return pointer first char prev line
1262 p = begin_line(p); // goto begining of cur line
1263 if (p[-1] == '\n' && p > text)
1264 p--; // step to prev line
1265 p = begin_line(p); // goto begining of prev line
1269 static char *next_line(char * p) // return pointer first char next line
1272 if (*p == '\n' && p < end - 1)
1273 p++; // step to next line
1277 //----- Text Information Routines ------------------------------
1278 static char *end_screen(void)
1283 // find new bottom line
1285 for (cnt = 0; cnt < rows - 2; cnt++)
1291 static int count_lines(char * start, char * stop) // count line from start to stop
1296 if (stop < start) { // start and stop are backwards- reverse them
1302 stop = end_line(stop); // get to end of this line
1303 for (q = start; q <= stop && q <= end - 1; q++) {
1310 static char *find_line(int li) // find begining of line #li
1314 for (q = text; li > 1; li--) {
1320 //----- Dot Movement Routines ----------------------------------
1321 static void dot_left(void)
1323 if (dot > text && dot[-1] != '\n')
1327 static void dot_right(void)
1329 if (dot < end - 1 && *dot != '\n')
1333 static void dot_begin(void)
1335 dot = begin_line(dot); // return pointer to first char cur line
1338 static void dot_end(void)
1340 dot = end_line(dot); // return pointer to last char cur line
1343 static char *move_to_col(char * p, int l)
1350 if (*p == '\n' || *p == '\0')
1353 co = next_tabstop(co);
1354 } else if (*p < ' ' || *p == 127) {
1355 co++; // display as ^X, use 2 columns
1357 } while (++co <= l && p++ < end);
1361 static void dot_next(void)
1363 dot = next_line(dot);
1366 static void dot_prev(void)
1368 dot = prev_line(dot);
1371 static void dot_scroll(int cnt, int dir)
1375 for (; cnt > 0; cnt--) {
1378 // ctrl-Y scroll up one line
1379 screenbegin = prev_line(screenbegin);
1382 // ctrl-E scroll down one line
1383 screenbegin = next_line(screenbegin);
1386 // make sure "dot" stays on the screen so we dont scroll off
1387 if (dot < screenbegin)
1389 q = end_screen(); // find new bottom line
1391 dot = begin_line(q); // is dot is below bottom line?
1395 static void dot_skip_over_ws(void)
1398 while (isspace(*dot) && *dot != '\n' && dot < end - 1)
1402 static void dot_delete(void) // delete the char at 'dot'
1404 text_hole_delete(dot, dot);
1407 static char *bound_dot(char * p) // make sure text[0] <= P < "end"
1409 if (p >= end && end > text) {
1411 indicate_error('1');
1415 indicate_error('2');
1420 //----- Helper Utility Routines --------------------------------
1422 //----------------------------------------------------------------
1423 //----- Char Routines --------------------------------------------
1424 /* Chars that are part of a word-
1425 * 0123456789_ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz
1426 * Chars that are Not part of a word (stoppers)
1427 * !"#$%&'()*+,-./:;<=>?@[\]^`{|}~
1428 * Chars that are WhiteSpace
1429 * TAB NEWLINE VT FF RETURN SPACE
1430 * DO NOT COUNT NEWLINE AS WHITESPACE
1433 static char *new_screen(int ro, int co)
1438 screensize = ro * co + 8;
1439 screen = xmalloc(screensize);
1440 // initialize the new screen. assume this will be a empty file.
1442 // non-existent text[] lines start with a tilde (~).
1443 for (li = 1; li < ro - 1; li++) {
1444 screen[(li * co) + 0] = '~';
1449 #if ENABLE_FEATURE_VI_SEARCH
1450 static int mycmp(const char * s1, const char * s2, int len)
1454 i = strncmp(s1, s2, len);
1455 if (ENABLE_FEATURE_VI_SETOPTS && ignorecase) {
1456 i = strncasecmp(s1, s2, len);
1461 // search for pattern starting at p
1462 static char *char_search(char * p, const char * pat, int dir, int range)
1464 #ifndef REGEX_SEARCH
1469 if (dir == FORWARD) {
1470 stop = end - 1; // assume range is p - end-1
1471 if (range == LIMITED)
1472 stop = next_line(p); // range is to next line
1473 for (start = p; start < stop; start++) {
1474 if (mycmp(start, pat, len) == 0) {
1478 } else if (dir == BACK) {
1479 stop = text; // assume range is text - p
1480 if (range == LIMITED)
1481 stop = prev_line(p); // range is to prev line
1482 for (start = p - len; start >= stop; start--) {
1483 if (mycmp(start, pat, len) == 0) {
1488 // pattern not found
1490 #else /* REGEX_SEARCH */
1492 struct re_pattern_buffer preg;
1496 re_syntax_options = RE_SYNTAX_POSIX_EXTENDED;
1502 // assume a LIMITED forward search
1510 // count the number of chars to search over, forward or backward
1514 // RANGE could be negative if we are searching backwards
1517 q = re_compile_pattern(pat, strlen(pat), &preg);
1519 // The pattern was not compiled
1520 psbs("bad search pattern: \"%s\": %s", pat, q);
1521 i = 0; // return p if pattern not compiled
1531 // search for the compiled pattern, preg, in p[]
1532 // range < 0- search backward
1533 // range > 0- search forward
1535 // re_search() < 0 not found or error
1536 // re_search() > 0 index of found pattern
1537 // struct pattern char int int int struct reg
1538 // re_search (*pattern_buffer, *string, size, start, range, *regs)
1539 i = re_search(&preg, q, size, 0, range, 0);
1542 i = 0; // return NULL if pattern not found
1545 if (dir == FORWARD) {
1551 #endif /* REGEX_SEARCH */
1553 #endif /* FEATURE_VI_SEARCH */
1555 static char *char_insert(char * p, char c) // insert the char c at 'p'
1557 if (c == 22) { // Is this an ctrl-V?
1558 p = stupid_insert(p, '^'); // use ^ to indicate literal next
1559 p--; // backup onto ^
1560 refresh(FALSE); // show the ^
1564 file_modified++; // has the file been modified
1565 } else if (c == 27) { // Is this an ESC?
1568 end_cmd_q(); // stop adding to q
1569 last_status_cksum = 0; // force status update
1570 if ((p[-1] != '\n') && (dot > text)) {
1573 } else if (c == erase_char || c == 8 || c == 127) { // Is this a BS
1575 if ((p[-1] != '\n') && (dot>text)) {
1577 p = text_hole_delete(p, p); // shrink buffer 1 char
1580 // insert a char into text[]
1581 char *sp; // "save p"
1584 c = '\n'; // translate \r to \n
1585 sp = p; // remember addr of insert
1586 p = stupid_insert(p, c); // insert the char
1587 #if ENABLE_FEATURE_VI_SETOPTS
1588 if (showmatch && strchr(")]}", *sp) != NULL) {
1591 if (autoindent && c == '\n') { // auto indent the new line
1594 q = prev_line(p); // use prev line as templet
1595 for (; isblank(*q); q++) {
1596 p = stupid_insert(p, *q); // insert the char
1604 static char *stupid_insert(char * p, char c) // stupidly insert the char c at 'p'
1606 p = text_hole_make(p, 1);
1609 file_modified++; // has the file been modified
1615 static char find_range(char ** start, char ** stop, char c)
1617 char *save_dot, *p, *q;
1623 if (strchr("cdy><", c)) {
1624 // these cmds operate on whole lines
1625 p = q = begin_line(p);
1626 for (cnt = 1; cnt < cmdcnt; cnt++) {
1630 } else if (strchr("^%$0bBeEft", c)) {
1631 // These cmds operate on char positions
1632 do_cmd(c); // execute movement cmd
1634 } else if (strchr("wW", c)) {
1635 do_cmd(c); // execute movement cmd
1636 // if we are at the next word's first char
1637 // step back one char
1638 // but check the possibilities when it is true
1639 if (dot > text && ((isspace(dot[-1]) && !isspace(dot[0]))
1640 || (ispunct(dot[-1]) && !ispunct(dot[0]))
1641 || (isalnum(dot[-1]) && !isalnum(dot[0]))))
1642 dot--; // move back off of next word
1643 if (dot > text && *dot == '\n')
1644 dot--; // stay off NL
1646 } else if (strchr("H-k{", c)) {
1647 // these operate on multi-lines backwards
1648 q = end_line(dot); // find NL
1649 do_cmd(c); // execute movement cmd
1652 } else if (strchr("L+j}\r\n", c)) {
1653 // these operate on multi-lines forwards
1654 p = begin_line(dot);
1655 do_cmd(c); // execute movement cmd
1656 dot_end(); // find NL
1659 c = 27; // error- return an ESC char
1672 static int st_test(char * p, int type, int dir, char * tested)
1682 if (type == S_BEFORE_WS) {
1684 test = ((!isspace(c)) || c == '\n');
1686 if (type == S_TO_WS) {
1688 test = ((!isspace(c)) || c == '\n');
1690 if (type == S_OVER_WS) {
1692 test = ((isspace(c)));
1694 if (type == S_END_PUNCT) {
1696 test = ((ispunct(c)));
1698 if (type == S_END_ALNUM) {
1700 test = ((isalnum(c)) || c == '_');
1706 static char *skip_thing(char * p, int linecnt, int dir, int type)
1710 while (st_test(p, type, dir, &c)) {
1711 // make sure we limit search to correct number of lines
1712 if (c == '\n' && --linecnt < 1)
1714 if (dir >= 0 && p >= end - 1)
1716 if (dir < 0 && p <= text)
1718 p += dir; // move to next char
1723 // find matching char of pair () [] {}
1724 static char *find_pair(char * p, const char c)
1731 dir = 1; // assume forward
1755 for (q = p + dir; text <= q && q < end; q += dir) {
1756 // look for match, count levels of pairs (( ))
1758 level++; // increase pair levels
1760 level--; // reduce pair level
1762 break; // found matching pair
1765 q = NULL; // indicate no match
1769 #if ENABLE_FEATURE_VI_SETOPTS
1770 // show the matching char of a pair, () [] {}
1771 static void showmatching(char * p)
1775 // we found half of a pair
1776 q = find_pair(p, *p); // get loc of matching char
1778 indicate_error('3'); // no matching char
1780 // "q" now points to matching pair
1781 save_dot = dot; // remember where we are
1782 dot = q; // go to new loc
1783 refresh(FALSE); // let the user see it
1784 mysleep(40); // give user some time
1785 dot = save_dot; // go back to old loc
1789 #endif /* FEATURE_VI_SETOPTS */
1791 // open a hole in text[]
1792 static char *text_hole_make(char * p, int size) // at "p", make a 'size' byte hole
1801 cnt = end - src; // the rest of buffer
1802 if ( ((end + size) >= (text + text_size)) // TODO: realloc here
1803 || memmove(dest, src, cnt) != dest) {
1804 psbs("can't create room for new characters");
1808 memset(p, ' ', size); // clear new hole
1809 end += size; // adjust the new END
1810 file_modified++; // has the file been modified
1815 // close a hole in text[]
1816 static char *text_hole_delete(char * p, char * q) // delete "p" thru "q", inclusive
1821 // move forwards, from beginning
1825 if (q < p) { // they are backward- swap them
1829 hole_size = q - p + 1;
1831 if (src < text || src > end)
1833 if (dest < text || dest >= end)
1836 goto thd_atend; // just delete the end of the buffer
1837 if (memmove(dest, src, cnt) != dest) {
1838 psbs("can't delete the character");
1841 end = end - hole_size; // adjust the new END
1843 dest = end - 1; // make sure dest in below end-1
1845 dest = end = text; // keep pointers valid
1846 file_modified++; // has the file been modified
1851 // copy text into register, then delete text.
1852 // if dist <= 0, do not include, or go past, a NewLine
1854 static char *yank_delete(char * start, char * stop, int dist, int yf)
1858 // make sure start <= stop
1860 // they are backwards, reverse them
1866 // we cannot cross NL boundaries
1870 // dont go past a NewLine
1871 for (; p + 1 <= stop; p++) {
1873 stop = p; // "stop" just before NewLine
1879 #if ENABLE_FEATURE_VI_YANKMARK
1880 text_yank(start, stop, YDreg);
1882 if (yf == YANKDEL) {
1883 p = text_hole_delete(start, stop);
1888 static void show_help(void)
1890 puts("These features are available:"
1891 #if ENABLE_FEATURE_VI_SEARCH
1892 "\n\tPattern searches with / and ?"
1894 #if ENABLE_FEATURE_VI_DOT_CMD
1895 "\n\tLast command repeat with \'.\'"
1897 #if ENABLE_FEATURE_VI_YANKMARK
1898 "\n\tLine marking with 'x"
1899 "\n\tNamed buffers with \"x"
1901 #if ENABLE_FEATURE_VI_READONLY
1902 "\n\tReadonly if vi is called as \"view\""
1903 "\n\tReadonly with -R command line arg"
1905 #if ENABLE_FEATURE_VI_SET
1906 "\n\tSome colon mode commands with \':\'"
1908 #if ENABLE_FEATURE_VI_SETOPTS
1909 "\n\tSettable options with \":set\""
1911 #if ENABLE_FEATURE_VI_USE_SIGNALS
1912 "\n\tSignal catching- ^C"
1913 "\n\tJob suspend and resume with ^Z"
1915 #if ENABLE_FEATURE_VI_WIN_RESIZE
1916 "\n\tAdapt to window re-sizes"
1921 static inline void print_literal(char * buf, const char * s) // copy s to buf, convert unprintable
1934 c_is_no_print = (c & 0x80) && !Isprint(c);
1935 if (c_is_no_print) {
1939 if (c < ' ' || c == 127) {
1955 #if ENABLE_FEATURE_VI_DOT_CMD
1956 static void start_new_cmd_q(char c)
1959 free(last_modifying_cmd);
1960 // get buffer for new cmd
1961 last_modifying_cmd = xzalloc(MAX_LINELEN);
1962 // if there is a current cmd count put it in the buffer first
1964 sprintf(last_modifying_cmd, "%d%c", cmdcnt, c);
1965 else // just save char c onto queue
1966 last_modifying_cmd[0] = c;
1970 static void end_cmd_q(void)
1972 #if ENABLE_FEATURE_VI_YANKMARK
1973 YDreg = 26; // go back to default Yank/Delete reg
1977 #endif /* FEATURE_VI_DOT_CMD */
1979 #if ENABLE_FEATURE_VI_YANKMARK \
1980 || (ENABLE_FEATURE_VI_COLON && ENABLE_FEATURE_VI_SEARCH) \
1981 || ENABLE_FEATURE_VI_CRASHME
1982 static char *string_insert(char * p, char * s) // insert the string at 'p'
1987 if (text_hole_make(p, i)) {
1989 for (cnt = 0; *s != '\0'; s++) {
1993 #if ENABLE_FEATURE_VI_YANKMARK
1994 psb("Put %d lines (%d chars) from [%c]", cnt, i, what_reg());
2001 #if ENABLE_FEATURE_VI_YANKMARK
2002 static char *text_yank(char * p, char * q, int dest) // copy text into a register
2007 if (q < p) { // they are backwards- reverse them
2014 free(t); // if already a yank register, free it
2015 t = xmalloc(cnt + 1); // get a new register
2016 memset(t, '\0', cnt + 1); // clear new text[]
2017 strncpy(t, p, cnt); // copy text[] into bufer
2022 static char what_reg(void)
2026 c = 'D'; // default to D-reg
2027 if (0 <= YDreg && YDreg <= 25)
2028 c = 'a' + (char) YDreg;
2036 static void check_context(char cmd)
2038 // A context is defined to be "modifying text"
2039 // Any modifying command establishes a new context.
2041 if (dot < context_start || dot > context_end) {
2042 if (strchr(modifying_cmds, cmd) != NULL) {
2043 // we are trying to modify text[]- make this the current context
2044 mark[27] = mark[26]; // move cur to prev
2045 mark[26] = dot; // move local to cur
2046 context_start = prev_line(prev_line(dot));
2047 context_end = next_line(next_line(dot));
2048 //loiter= start_loiter= now;
2053 static inline char *swap_context(char * p) // goto new context for '' command make this the current context
2057 // the current context is in mark[26]
2058 // the previous context is in mark[27]
2059 // only swap context if other context is valid
2060 if (text <= mark[27] && mark[27] <= end - 1) {
2062 mark[27] = mark[26];
2064 p = mark[26]; // where we are going- previous context
2065 context_start = prev_line(prev_line(prev_line(p)));
2066 context_end = next_line(next_line(next_line(p)));
2070 #endif /* FEATURE_VI_YANKMARK */
2072 //----- Set terminal attributes --------------------------------
2073 static void rawmode(void)
2075 tcgetattr(0, &term_orig);
2076 term_vi = term_orig;
2077 term_vi.c_lflag &= (~ICANON & ~ECHO); // leave ISIG ON- allow intr's
2078 term_vi.c_iflag &= (~IXON & ~ICRNL);
2079 term_vi.c_oflag &= (~ONLCR);
2080 term_vi.c_cc[VMIN] = 1;
2081 term_vi.c_cc[VTIME] = 0;
2082 erase_char = term_vi.c_cc[VERASE];
2083 tcsetattr(0, TCSANOW, &term_vi);
2086 static void cookmode(void)
2089 tcsetattr(0, TCSANOW, &term_orig);
2092 //----- Come here when we get a window resize signal ---------
2093 #if ENABLE_FEATURE_VI_USE_SIGNALS
2094 static void winch_sig(int sig ATTRIBUTE_UNUSED)
2096 signal(SIGWINCH, winch_sig);
2097 if (ENABLE_FEATURE_VI_WIN_RESIZE)
2098 get_terminal_width_height(0, &columns, &rows);
2099 new_screen(rows, columns); // get memory for virtual screen
2100 redraw(TRUE); // re-draw the screen
2103 //----- Come here when we get a continue signal -------------------
2104 static void cont_sig(int sig ATTRIBUTE_UNUSED)
2106 rawmode(); // terminal to "raw"
2107 last_status_cksum = 0; // force status update
2108 redraw(TRUE); // re-draw the screen
2110 signal(SIGTSTP, suspend_sig);
2111 signal(SIGCONT, SIG_DFL);
2112 kill(my_pid, SIGCONT);
2115 //----- Come here when we get a Suspend signal -------------------
2116 static void suspend_sig(int sig ATTRIBUTE_UNUSED)
2118 place_cursor(rows - 1, 0, FALSE); // go to bottom of screen
2119 clear_to_eol(); // Erase to end of line
2120 cookmode(); // terminal to "cooked"
2122 signal(SIGCONT, cont_sig);
2123 signal(SIGTSTP, SIG_DFL);
2124 kill(my_pid, SIGTSTP);
2127 //----- Come here when we get a signal ---------------------------
2128 static void catch_sig(int sig)
2130 signal(SIGINT, catch_sig);
2132 longjmp(restart, sig);
2134 #endif /* FEATURE_VI_USE_SIGNALS */
2136 static int mysleep(int hund) // sleep for 'h' 1/100 seconds
2138 struct pollfd pfd[1];
2141 pfd[0].events = POLLIN;
2142 return safe_poll(pfd, 1, hund*10) > 0;
2145 #define readbuffer bb_common_bufsiz1
2147 static int readed_for_parse;
2149 //----- IO Routines --------------------------------------------
2150 static char readit(void) // read (maybe cursor) key from stdin
2159 static const struct esc_cmds esccmds[] = {
2160 {"OA", VI_K_UP}, // cursor key Up
2161 {"OB", VI_K_DOWN}, // cursor key Down
2162 {"OC", VI_K_RIGHT}, // Cursor Key Right
2163 {"OD", VI_K_LEFT}, // cursor key Left
2164 {"OH", VI_K_HOME}, // Cursor Key Home
2165 {"OF", VI_K_END}, // Cursor Key End
2166 {"[A", VI_K_UP}, // cursor key Up
2167 {"[B", VI_K_DOWN}, // cursor key Down
2168 {"[C", VI_K_RIGHT}, // Cursor Key Right
2169 {"[D", VI_K_LEFT}, // cursor key Left
2170 {"[H", VI_K_HOME}, // Cursor Key Home
2171 {"[F", VI_K_END}, // Cursor Key End
2172 {"[1~", VI_K_HOME}, // Cursor Key Home
2173 {"[2~", VI_K_INSERT}, // Cursor Key Insert
2174 {"[4~", VI_K_END}, // Cursor Key End
2175 {"[5~", VI_K_PAGEUP}, // Cursor Key Page Up
2176 {"[6~", VI_K_PAGEDOWN},// Cursor Key Page Down
2177 {"OP", VI_K_FUN1}, // Function Key F1
2178 {"OQ", VI_K_FUN2}, // Function Key F2
2179 {"OR", VI_K_FUN3}, // Function Key F3
2180 {"OS", VI_K_FUN4}, // Function Key F4
2181 // careful: these have no terminating NUL!
2182 {"[15~", VI_K_FUN5}, // Function Key F5
2183 {"[17~", VI_K_FUN6}, // Function Key F6
2184 {"[18~", VI_K_FUN7}, // Function Key F7
2185 {"[19~", VI_K_FUN8}, // Function Key F8
2186 {"[20~", VI_K_FUN9}, // Function Key F9
2187 {"[21~", VI_K_FUN10}, // Function Key F10
2188 {"[23~", VI_K_FUN11}, // Function Key F11
2189 {"[24~", VI_K_FUN12}, // Function Key F12
2190 {"[11~", VI_K_FUN1}, // Function Key F1
2191 {"[12~", VI_K_FUN2}, // Function Key F2
2192 {"[13~", VI_K_FUN3}, // Function Key F3
2193 {"[14~", VI_K_FUN4}, // Function Key F4
2195 enum { ESCCMDS_COUNT = ARRAY_SIZE(esccmds) };
2197 alarm(0); // turn alarm OFF while we wait for input
2199 n = readed_for_parse;
2200 // get input from User- are there already input chars in Q?
2202 // the Q is empty, wait for a typed char
2203 n = safe_read(0, readbuffer, MAX_LINELEN - 1);
2205 if (errno == EBADF || errno == EFAULT || errno == EINVAL
2212 if (readbuffer[0] == 27) {
2213 // This is an ESC char. Is this Esc sequence?
2214 // Could be bare Esc key. See if there are any
2215 // more chars to read after the ESC. This would
2216 // be a Function or Cursor Key sequence.
2217 struct pollfd pfd[1];
2219 pfd[0].events = POLLIN;
2220 // keep reading while there are input chars and room in buffer
2221 while (safe_poll(pfd, 1, 0) > 0 && n <= (MAX_LINELEN - 5)) {
2222 // read the rest of the ESC string
2223 int r = safe_read(0, readbuffer + n, MAX_LINELEN - n);
2228 readed_for_parse = n;
2231 if (c == 27 && n > 1) {
2232 // Maybe cursor or function key?
2233 const struct esc_cmds *eindex;
2235 for (eindex = esccmds; eindex < &esccmds[ESCCMDS_COUNT]; eindex++) {
2236 int cnt = strnlen(eindex->seq, 4);
2240 if (strncmp(eindex->seq, readbuffer + 1, cnt))
2242 // is a Cursor key- put derived value back into Q
2244 // for squeeze out the ESC sequence
2248 if (eindex == &esccmds[ESCCMDS_COUNT]) {
2249 /* defined ESC sequence not found, set only one ESC */
2255 // remove key sequence from Q
2256 readed_for_parse -= n;
2257 memmove(readbuffer, readbuffer + n, MAX_LINELEN - n);
2258 alarm(3); // we are done waiting for input, turn alarm ON
2262 //----- IO Routines --------------------------------------------
2263 static char get_one_char(void)
2267 #if ENABLE_FEATURE_VI_DOT_CMD
2268 // ! adding2q && ioq == 0 read()
2269 // ! adding2q && ioq != 0 *ioq
2270 // adding2q *last_modifying_cmd= read()
2272 // we are not adding to the q.
2273 // but, we may be reading from a q
2275 // there is no current q, read from STDIN
2276 c = readit(); // get the users input
2278 // there is a queue to get chars from first
2281 // the end of the q, read from STDIN
2283 ioq_start = ioq = 0;
2284 c = readit(); // get the users input
2288 // adding STDIN chars to q
2289 c = readit(); // get the users input
2290 if (last_modifying_cmd != 0) {
2291 int len = strlen(last_modifying_cmd);
2292 if (len >= MAX_LINELEN - 1) {
2293 psbs("last_modifying_cmd overrun");
2295 // add new char to q
2296 last_modifying_cmd[len] = c;
2301 c = readit(); // get the users input
2302 #endif /* FEATURE_VI_DOT_CMD */
2303 return c; // return the char, where ever it came from
2306 static char *get_input_line(const char * prompt) // get input line- use "status line"
2310 char buf[MAX_LINELEN];
2314 strcpy(buf, prompt);
2315 last_status_cksum = 0; // force status update
2316 place_cursor(rows - 1, 0, FALSE); // go to Status line, bottom of screen
2317 clear_to_eol(); // clear the line
2318 write1(prompt); // write out the :, /, or ? prompt
2321 while (i < MAX_LINELEN) {
2322 c = get_one_char(); // read user input
2323 if (c == '\n' || c == '\r' || c == 27)
2324 break; // is this end of input
2325 if (c == erase_char || c == 8 || c == 127) {
2326 // user wants to erase prev char
2327 i--; // backup to prev char
2328 buf[i] = '\0'; // erase the char
2329 buf[i + 1] = '\0'; // null terminate buffer
2330 write1("\b \b"); // erase char on screen
2331 if (i <= 0) { // user backs up before b-o-l, exit
2335 buf[i] = c; // save char in buffer
2336 buf[i + 1] = '\0'; // make sure buffer is null terminated
2337 bb_putchar(c); // echo the char back to user
2343 obufp = xstrdup(buf);
2347 static int file_size(const char *fn) // what is the byte size of "fn"
2353 if (fn && fn[0] && stat(fn, &st_buf) == 0) // see if file exists
2354 cnt = (int) st_buf.st_size;
2358 static int file_insert(const char * fn, char *p
2359 USE_FEATURE_VI_READONLY(, int update_ro_status))
2363 struct stat statbuf;
2366 if (stat(fn, &statbuf) < 0) {
2367 psbs("\"%s\" %s", fn, strerror(errno));
2370 if ((statbuf.st_mode & S_IFREG) == 0) {
2371 // This is not a regular file
2372 psbs("\"%s\" Not a regular file", fn);
2375 /* // this check is done by open()
2376 if ((statbuf.st_mode & (S_IRUSR | S_IRGRP | S_IROTH)) == 0) {
2377 // dont have any read permissions
2378 psbs("\"%s\" Not readable", fn);
2382 if (p < text || p > end) {
2383 psbs("Trying to insert file outside of memory");
2387 // read file to buffer
2388 fd = open(fn, O_RDONLY);
2390 psbs("\"%s\" %s", fn, strerror(errno));
2393 size = statbuf.st_size;
2394 p = text_hole_make(p, size);
2397 cnt = safe_read(fd, p, size);
2399 psbs("\"%s\" %s", fn, strerror(errno));
2400 p = text_hole_delete(p, p + size - 1); // un-do buffer insert
2401 } else if (cnt < size) {
2402 // There was a partial read, shrink unused space text[]
2403 p = text_hole_delete(p + cnt, p + (size - cnt) - 1); // un-do buffer insert
2404 psbs("cannot read all of file \"%s\"", fn);
2410 #if ENABLE_FEATURE_VI_READONLY
2411 if (update_ro_status
2412 && ((access(fn, W_OK) < 0) ||
2413 /* root will always have access()
2414 * so we check fileperms too */
2415 !(statbuf.st_mode & (S_IWUSR | S_IWGRP | S_IWOTH))
2418 SET_READONLY_FILE(readonly_mode);
2425 static int file_write(char * fn, char * first, char * last)
2427 int fd, cnt, charcnt;
2430 psbs("No current filename");
2434 // FIXIT- use the correct umask()
2435 fd = open(fn, (O_WRONLY | O_CREAT | O_TRUNC), 0664);
2438 cnt = last - first + 1;
2439 charcnt = write(fd, first, cnt);
2440 if (charcnt == cnt) {
2442 //file_modified = FALSE; // the file has not been modified
2450 //----- Terminal Drawing ---------------------------------------
2451 // The terminal is made up of 'rows' line of 'columns' columns.
2452 // classically this would be 24 x 80.
2453 // screen coordinates
2459 // 23,0 ... 23,79 status line
2462 //----- Move the cursor to row x col (count from 0, not 1) -------
2463 static void place_cursor(int row, int col, int opti)
2465 char cm1[MAX_LINELEN];
2467 #if ENABLE_FEATURE_VI_OPTIMIZE_CURSOR
2468 char cm2[MAX_LINELEN];
2470 // char cm3[MAX_LINELEN];
2471 int Rrow = last_row;
2474 memset(cm1, '\0', MAX_LINELEN); // clear the buffer
2476 if (row < 0) row = 0;
2477 if (row >= rows) row = rows - 1;
2478 if (col < 0) col = 0;
2479 if (col >= columns) col = columns - 1;
2481 //----- 1. Try the standard terminal ESC sequence
2482 sprintf(cm1, CMrc, row + 1, col + 1);
2487 #if ENABLE_FEATURE_VI_OPTIMIZE_CURSOR
2488 //----- find the minimum # of chars to move cursor -------------
2489 //----- 2. Try moving with discreet chars (Newline, [back]space, ...)
2490 memset(cm2, '\0', MAX_LINELEN); // clear the buffer
2492 // move to the correct row
2493 while (row < Rrow) {
2494 // the cursor has to move up
2498 while (row > Rrow) {
2499 // the cursor has to move down
2500 strcat(cm2, CMdown);
2504 // now move to the correct column
2505 strcat(cm2, "\r"); // start at col 0
2506 // just send out orignal source char to get to correct place
2507 screenp = &screen[row * columns]; // start of screen line
2508 strncat(cm2, screenp, col);
2510 //----- 3. Try some other way of moving cursor
2511 //---------------------------------------------
2513 // pick the shortest cursor motion to send out
2515 if (strlen(cm2) < strlen(cm)) {
2517 } /* else if (strlen(cm3) < strlen(cm)) {
2520 #endif /* FEATURE_VI_OPTIMIZE_CURSOR */
2522 write1(cm); // move the cursor
2525 //----- Erase from cursor to end of line -----------------------
2526 static void clear_to_eol(void)
2528 write1(Ceol); // Erase from cursor to end of line
2531 //----- Erase from cursor to end of screen -----------------------
2532 static void clear_to_eos(void)
2534 write1(Ceos); // Erase from cursor to end of screen
2537 //----- Start standout mode ------------------------------------
2538 static void standout_start(void) // send "start reverse video" sequence
2540 write1(SOs); // Start reverse video mode
2543 //----- End standout mode --------------------------------------
2544 static void standout_end(void) // send "end reverse video" sequence
2546 write1(SOn); // End reverse video mode
2549 //----- Flash the screen --------------------------------------
2550 static void flash(int h)
2552 standout_start(); // send "start reverse video" sequence
2555 standout_end(); // send "end reverse video" sequence
2559 static void Indicate_Error(void)
2561 #if ENABLE_FEATURE_VI_CRASHME
2563 return; // generate a random command
2566 write1(bell); // send out a bell character
2572 //----- Screen[] Routines --------------------------------------
2573 //----- Erase the Screen[] memory ------------------------------
2574 static void screen_erase(void)
2576 memset(screen, ' ', screensize); // clear new screen
2579 static int bufsum(char *buf, int count)
2582 char *e = buf + count;
2585 sum += (unsigned char) *buf++;
2589 //----- Draw the status line at bottom of the screen -------------
2590 static void show_status_line(void)
2592 int cnt = 0, cksum = 0;
2594 // either we already have an error or status message, or we
2596 if (!have_status_msg) {
2597 cnt = format_edit_status();
2598 cksum = bufsum(status_buffer, cnt);
2600 if (have_status_msg || ((cnt > 0 && last_status_cksum != cksum))) {
2601 last_status_cksum= cksum; // remember if we have seen this line
2602 place_cursor(rows - 1, 0, FALSE); // put cursor on status line
2603 write1(status_buffer);
2605 if (have_status_msg) {
2606 if (((int)strlen(status_buffer) - (have_status_msg - 1)) >
2608 have_status_msg = 0;
2611 have_status_msg = 0;
2613 place_cursor(crow, ccol, FALSE); // put cursor back in correct place
2618 //----- format the status buffer, the bottom line of screen ------
2619 // format status buffer, with STANDOUT mode
2620 static void psbs(const char *format, ...)
2624 va_start(args, format);
2625 strcpy(status_buffer, SOs); // Terminal standout mode on
2626 vsprintf(status_buffer + strlen(status_buffer), format, args);
2627 strcat(status_buffer, SOn); // Terminal standout mode off
2630 have_status_msg = 1 + sizeof(SOs) + sizeof(SOn) - 2;
2633 // format status buffer
2634 static void psb(const char *format, ...)
2638 va_start(args, format);
2639 vsprintf(status_buffer, format, args);
2642 have_status_msg = 1;
2645 static void ni(const char * s) // display messages
2647 char buf[MAX_LINELEN];
2649 print_literal(buf, s);
2650 psbs("\'%s\' is not implemented", buf);
2653 static int format_edit_status(void) // show file status on status line
2656 static const char cmd_mode_indicator[] ALIGN1 = "-IR-";
2657 int cur, percent, ret, trunc_at;
2659 // file_modified is now a counter rather than a flag. this
2660 // helps reduce the amount of line counting we need to do.
2661 // (this will cause a mis-reporting of modified status
2662 // once every MAXINT editing operations.)
2664 // it would be nice to do a similar optimization here -- if
2665 // we haven't done a motion that could have changed which line
2666 // we're on, then we shouldn't have to do this count_lines()
2667 cur = count_lines(text, dot);
2669 // reduce counting -- the total lines can't have
2670 // changed if we haven't done any edits.
2671 if (file_modified != last_file_modified) {
2672 tot = cur + count_lines(dot, end - 1) - 1;
2673 last_file_modified = file_modified;
2676 // current line percent
2677 // ------------- ~~ ----------
2680 percent = (100 * cur) / tot;
2686 trunc_at = columns < STATUS_BUFFER_LEN-1 ?
2687 columns : STATUS_BUFFER_LEN-1;
2689 ret = snprintf(status_buffer, trunc_at+1,
2690 #if ENABLE_FEATURE_VI_READONLY
2691 "%c %s%s%s %d/%d %d%%",
2693 "%c %s%s %d/%d %d%%",
2695 cmd_mode_indicator[cmd_mode & 3],
2696 (current_filename != NULL ? current_filename : "No file"),
2697 #if ENABLE_FEATURE_VI_READONLY
2698 (readonly_mode ? " [Readonly]" : ""),
2700 (file_modified ? " [Modified]" : ""),
2703 if (ret >= 0 && ret < trunc_at)
2704 return ret; /* it all fit */
2706 return trunc_at; /* had to truncate */
2709 //----- Force refresh of all Lines -----------------------------
2710 static void redraw(int full_screen)
2712 place_cursor(0, 0, FALSE); // put cursor in correct place
2713 clear_to_eos(); // tel terminal to erase display
2714 screen_erase(); // erase the internal screen buffer
2715 last_status_cksum = 0; // force status update
2716 refresh(full_screen); // this will redraw the entire display
2720 //----- Format a text[] line into a buffer ---------------------
2721 static void format_line(char *dest, char *src, int li)
2726 for (co = 0; co < MAX_SCR_COLS; co++) {
2727 c = ' '; // assume blank
2728 if (li > 0 && co == 0) {
2729 c = '~'; // not first line, assume Tilde
2731 // are there chars in text[] and have we gone past the end
2732 if (text < end && src < end) {
2737 if ((c & 0x80) && !Isprint(c)) {
2740 if ((unsigned char)(c) < ' ' || c == 0x7f) {
2744 for (; (co % tabstop) != (tabstop - 1); co++) {
2752 c += '@'; // make it visible
2755 // the co++ is done here so that the column will
2756 // not be overwritten when we blank-out the rest of line
2763 //----- Refresh the changed screen lines -----------------------
2764 // Copy the source line from text[] into the buffer and note
2765 // if the current screenline is different from the new buffer.
2766 // If they differ then that line needs redrawing on the terminal.
2768 static void refresh(int full_screen)
2770 static int old_offset;
2773 char buf[MAX_SCR_COLS];
2774 char *tp, *sp; // pointer into text[] and screen[]
2775 #if ENABLE_FEATURE_VI_OPTIMIZE_CURSOR
2776 int last_li = -2; // last line that changed- for optimizing cursor movement
2779 if (ENABLE_FEATURE_VI_WIN_RESIZE)
2780 get_terminal_width_height(0, &columns, &rows);
2781 sync_cursor(dot, &crow, &ccol); // where cursor will be (on "dot")
2782 tp = screenbegin; // index into text[] of top line
2784 // compare text[] to screen[] and mark screen[] lines that need updating
2785 for (li = 0; li < rows - 1; li++) {
2786 int cs, ce; // column start & end
2787 memset(buf, ' ', MAX_SCR_COLS); // blank-out the buffer
2788 buf[MAX_SCR_COLS-1] = 0; // NULL terminate the buffer
2789 // format current text line into buf
2790 format_line(buf, tp, li);
2792 // skip to the end of the current text[] line
2793 while (tp < end && *tp++ != '\n') /*no-op*/;
2795 // see if there are any changes between vitual screen and buf
2796 changed = FALSE; // assume no change
2799 sp = &screen[li * columns]; // start of screen line
2801 // force re-draw of every single column from 0 - columns-1
2804 // compare newly formatted buffer with virtual screen
2805 // look forward for first difference between buf and screen
2806 for (; cs <= ce; cs++) {
2807 if (buf[cs + offset] != sp[cs]) {
2808 changed = TRUE; // mark for redraw
2813 // look backward for last difference between buf and screen
2814 for ( ; ce >= cs; ce--) {
2815 if (buf[ce + offset] != sp[ce]) {
2816 changed = TRUE; // mark for redraw
2820 // now, cs is index of first diff, and ce is index of last diff
2822 // if horz offset has changed, force a redraw
2823 if (offset != old_offset) {
2828 // make a sanity check of columns indexes
2830 if (ce > columns-1) ce= columns-1;
2831 if (cs > ce) { cs= 0; ce= columns-1; }
2832 // is there a change between vitual screen and buf
2834 // copy changed part of buffer to virtual screen
2835 memmove(sp+cs, buf+(cs+offset), ce-cs+1);
2837 // move cursor to column of first change
2838 if (offset != old_offset) {
2839 // opti_cur_move is still too stupid
2840 // to handle offsets correctly
2841 place_cursor(li, cs, FALSE);
2843 #if ENABLE_FEATURE_VI_OPTIMIZE_CURSOR
2844 // if this just the next line
2845 // try to optimize cursor movement
2846 // otherwise, use standard ESC sequence
2847 place_cursor(li, cs, li == (last_li+1) ? TRUE : FALSE);
2850 place_cursor(li, cs, FALSE); // use standard ESC sequence
2851 #endif /* FEATURE_VI_OPTIMIZE_CURSOR */
2854 // write line out to terminal
2856 int nic = ce - cs + 1;
2857 char *out = sp + cs;
2864 #if ENABLE_FEATURE_VI_OPTIMIZE_CURSOR
2870 #if ENABLE_FEATURE_VI_OPTIMIZE_CURSOR
2871 place_cursor(crow, ccol, (crow == last_row) ? TRUE : FALSE);
2874 place_cursor(crow, ccol, FALSE);
2877 if (offset != old_offset)
2878 old_offset = offset;
2881 //---------------------------------------------------------------------
2882 //----- the Ascii Chart -----------------------------------------------
2884 // 00 nul 01 soh 02 stx 03 etx 04 eot 05 enq 06 ack 07 bel
2885 // 08 bs 09 ht 0a nl 0b vt 0c np 0d cr 0e so 0f si
2886 // 10 dle 11 dc1 12 dc2 13 dc3 14 dc4 15 nak 16 syn 17 etb
2887 // 18 can 19 em 1a sub 1b esc 1c fs 1d gs 1e rs 1f us
2888 // 20 sp 21 ! 22 " 23 # 24 $ 25 % 26 & 27 '
2889 // 28 ( 29 ) 2a * 2b + 2c , 2d - 2e . 2f /
2890 // 30 0 31 1 32 2 33 3 34 4 35 5 36 6 37 7
2891 // 38 8 39 9 3a : 3b ; 3c < 3d = 3e > 3f ?
2892 // 40 @ 41 A 42 B 43 C 44 D 45 E 46 F 47 G
2893 // 48 H 49 I 4a J 4b K 4c L 4d M 4e N 4f O
2894 // 50 P 51 Q 52 R 53 S 54 T 55 U 56 V 57 W
2895 // 58 X 59 Y 5a Z 5b [ 5c \ 5d ] 5e ^ 5f _
2896 // 60 ` 61 a 62 b 63 c 64 d 65 e 66 f 67 g
2897 // 68 h 69 i 6a j 6b k 6c l 6d m 6e n 6f o
2898 // 70 p 71 q 72 r 73 s 74 t 75 u 76 v 77 w
2899 // 78 x 79 y 7a z 7b { 7c | 7d } 7e ~ 7f del
2900 //---------------------------------------------------------------------
2902 //----- Execute a Vi Command -----------------------------------
2903 static void do_cmd(char c)
2906 char c1, *p, *q, buf[9], *save_dot;
2907 int cnt, i, j, dir, yf;
2909 c1 = c; // quiet the compiler
2910 cnt = yf = dir = 0; // quiet the compiler
2911 msg = p = q = save_dot = buf; // quiet the compiler
2912 memset(buf, '\0', 9); // clear buf
2916 /* if this is a cursor key, skip these checks */
2929 if (cmd_mode == 2) {
2930 // flip-flop Insert/Replace mode
2931 if (c == VI_K_INSERT)
2933 // we are 'R'eplacing the current *dot with new char
2935 // don't Replace past E-o-l
2936 cmd_mode = 1; // convert to insert
2938 if (1 <= c || Isprint(c)) {
2940 dot = yank_delete(dot, dot, 0, YANKDEL); // delete char
2941 dot = char_insert(dot, c); // insert new char
2946 if (cmd_mode == 1) {
2947 // hitting "Insert" twice means "R" replace mode
2948 if (c == VI_K_INSERT) goto dc5;
2949 // insert the char c at "dot"
2950 if (1 <= c || Isprint(c)) {
2951 dot = char_insert(dot, c);
2966 #if ENABLE_FEATURE_VI_CRASHME
2967 case 0x14: // dc4 ctrl-T
2968 crashme = (crashme == 0) ? 1 : 0;
2999 //case 'u': // u- FIXME- there is no undo
3001 default: // unrecognised command
3010 end_cmd_q(); // stop adding to q
3011 case 0x00: // nul- ignore
3013 case 2: // ctrl-B scroll up full screen
3014 case VI_K_PAGEUP: // Cursor Key Page Up
3015 dot_scroll(rows - 2, -1);
3017 #if ENABLE_FEATURE_VI_USE_SIGNALS
3018 case 0x03: // ctrl-C interrupt
3019 longjmp(restart, 1);
3021 case 26: // ctrl-Z suspend
3022 suspend_sig(SIGTSTP);
3025 case 4: // ctrl-D scroll down half screen
3026 dot_scroll((rows - 2) / 2, 1);
3028 case 5: // ctrl-E scroll down one line
3031 case 6: // ctrl-F scroll down full screen
3032 case VI_K_PAGEDOWN: // Cursor Key Page Down
3033 dot_scroll(rows - 2, 1);
3035 case 7: // ctrl-G show current status
3036 last_status_cksum = 0; // force status update
3038 case 'h': // h- move left
3039 case VI_K_LEFT: // cursor key Left
3040 case 8: // ctrl-H- move left (This may be ERASE char)
3041 case 0x7f: // DEL- move left (This may be ERASE char)
3047 case 10: // Newline ^J
3048 case 'j': // j- goto next line, same col
3049 case VI_K_DOWN: // cursor key Down
3053 dot_next(); // go to next B-o-l
3054 dot = move_to_col(dot, ccol + offset); // try stay in same col
3056 case 12: // ctrl-L force redraw whole screen
3057 case 18: // ctrl-R force redraw
3058 place_cursor(0, 0, FALSE); // put cursor in correct place
3059 clear_to_eos(); // tel terminal to erase display
3061 screen_erase(); // erase the internal screen buffer
3062 last_status_cksum = 0; // force status update
3063 refresh(TRUE); // this will redraw the entire display
3065 case 13: // Carriage Return ^M
3066 case '+': // +- goto next line
3073 case 21: // ctrl-U scroll up half screen
3074 dot_scroll((rows - 2) / 2, -1);
3076 case 25: // ctrl-Y scroll up one line
3082 cmd_mode = 0; // stop insrting
3084 last_status_cksum = 0; // force status update
3086 case ' ': // move right
3087 case 'l': // move right
3088 case VI_K_RIGHT: // Cursor Key Right
3094 #if ENABLE_FEATURE_VI_YANKMARK
3095 case '"': // "- name a register to use for Delete/Yank
3096 c1 = get_one_char();
3104 case '\'': // '- goto a specific mark
3105 c1 = get_one_char();
3110 q = mark[(unsigned char) c1];
3111 if (text <= q && q < end) {
3113 dot_begin(); // go to B-o-l
3116 } else if (c1 == '\'') { // goto previous context
3117 dot = swap_context(dot); // swap current and previous context
3118 dot_begin(); // go to B-o-l
3124 case 'm': // m- Mark a line
3125 // this is really stupid. If there are any inserts or deletes
3126 // between text[0] and dot then this mark will not point to the
3127 // correct location! It could be off by many lines!
3128 // Well..., at least its quick and dirty.
3129 c1 = get_one_char();
3133 // remember the line
3134 mark[(int) c1] = dot;
3139 case 'P': // P- Put register before
3140 case 'p': // p- put register after
3143 psbs("Nothing in register %c", what_reg());
3146 // are we putting whole lines or strings
3147 if (strchr(p, '\n') != NULL) {
3149 dot_begin(); // putting lines- Put above
3152 // are we putting after very last line?
3153 if (end_line(dot) == (end - 1)) {
3154 dot = end; // force dot to end of text[]
3156 dot_next(); // next line, then put before
3161 dot_right(); // move to right, can move to NL
3163 dot = string_insert(dot, p); // insert the string
3164 end_cmd_q(); // stop adding to q
3166 case 'U': // U- Undo; replace current line with original version
3167 if (reg[Ureg] != 0) {
3168 p = begin_line(dot);
3170 p = text_hole_delete(p, q); // delete cur line
3171 p = string_insert(p, reg[Ureg]); // insert orig line
3176 #endif /* FEATURE_VI_YANKMARK */
3177 case '$': // $- goto end of line
3178 case VI_K_END: // Cursor Key End
3182 dot = end_line(dot);
3184 case '%': // %- find matching char of pair () [] {}
3185 for (q = dot; q < end && *q != '\n'; q++) {
3186 if (strchr("()[]{}", *q) != NULL) {
3187 // we found half of a pair
3188 p = find_pair(q, *q);
3200 case 'f': // f- forward to a user specified char
3201 last_forward_char = get_one_char(); // get the search char
3203 // dont separate these two commands. 'f' depends on ';'
3205 //**** fall thru to ... ';'
3206 case ';': // ;- look at rest of line for last forward char
3210 if (last_forward_char == 0)
3213 while (q < end - 1 && *q != '\n' && *q != last_forward_char) {
3216 if (*q == last_forward_char)
3219 case '-': // -- goto prev line
3226 #if ENABLE_FEATURE_VI_DOT_CMD
3227 case '.': // .- repeat the last modifying command
3228 // Stuff the last_modifying_cmd back into stdin
3229 // and let it be re-executed.
3230 if (last_modifying_cmd != 0) {
3231 ioq = ioq_start = xstrdup(last_modifying_cmd);
3235 #if ENABLE_FEATURE_VI_SEARCH
3236 case '?': // /- search for a pattern
3237 case '/': // /- search for a pattern
3240 q = get_input_line(buf); // get input line- use "status line"
3242 goto dc3; // if no pat re-use old pat
3243 if (q[0]) { // strlen(q) > 1: new pat- save it and find
3244 // there is a new pat
3245 free(last_search_pattern);
3246 last_search_pattern = xstrdup(q);
3247 goto dc3; // now find the pattern
3249 // user changed mind and erased the "/"- do nothing
3251 case 'N': // N- backward search for last pattern
3255 dir = BACK; // assume BACKWARD search
3257 if (last_search_pattern[0] == '?') {
3261 goto dc4; // now search for pattern
3263 case 'n': // n- repeat search for last pattern
3264 // search rest of text[] starting at next char
3265 // if search fails return orignal "p" not the "p+1" address
3270 if (last_search_pattern == 0) {
3271 msg = "No previous regular expression";
3274 if (last_search_pattern[0] == '/') {
3275 dir = FORWARD; // assume FORWARD search
3278 if (last_search_pattern[0] == '?') {
3283 q = char_search(p, last_search_pattern + 1, dir, FULL);
3285 dot = q; // good search, update "dot"
3289 // no pattern found between "dot" and "end"- continue at top
3294 q = char_search(p, last_search_pattern + 1, dir, FULL);
3295 if (q != NULL) { // found something
3296 dot = q; // found new pattern- goto it
3297 msg = "search hit BOTTOM, continuing at TOP";
3299 msg = "search hit TOP, continuing at BOTTOM";
3302 msg = "Pattern not found";
3308 case '{': // {- move backward paragraph
3309 q = char_search(dot, "\n\n", BACK, FULL);
3310 if (q != NULL) { // found blank line
3311 dot = next_line(q); // move to next blank line
3314 case '}': // }- move forward paragraph
3315 q = char_search(dot, "\n\n", FORWARD, FULL);
3316 if (q != NULL) { // found blank line
3317 dot = next_line(q); // move to next blank line
3320 #endif /* FEATURE_VI_SEARCH */
3321 case '0': // 0- goto begining of line
3331 if (c == '0' && cmdcnt < 1) {
3332 dot_begin(); // this was a standalone zero
3334 cmdcnt = cmdcnt * 10 + (c - '0'); // this 0 is part of a number
3337 case ':': // :- the colon mode commands
3338 p = get_input_line(":"); // get input line- use "status line"
3339 #if ENABLE_FEATURE_VI_COLON
3340 colon(p); // execute the command
3343 p++; // move past the ':'
3347 if (strncasecmp(p, "quit", cnt) == 0
3348 || strncasecmp(p, "q!", cnt) == 0 // delete lines
3350 if (file_modified && p[1] != '!') {
3351 psbs("No write since last change (:quit! overrides)");
3355 } else if (strncasecmp(p, "write", cnt) == 0
3356 || strncasecmp(p, "wq", cnt) == 0
3357 || strncasecmp(p, "wn", cnt) == 0
3358 || strncasecmp(p, "x", cnt) == 0
3360 cnt = file_write(current_filename, text, end - 1);
3363 psbs("Write error: %s", strerror(errno));
3366 last_file_modified = -1;
3367 psb("\"%s\" %dL, %dC", current_filename, count_lines(text, end - 1), cnt);
3368 if (p[0] == 'x' || p[1] == 'q' || p[1] == 'n'
3369 || p[0] == 'X' || p[1] == 'Q' || p[1] == 'N'
3374 } else if (strncasecmp(p, "file", cnt) == 0) {
3375 last_status_cksum = 0; // force status update
3376 } else if (sscanf(p, "%d", &j) > 0) {
3377 dot = find_line(j); // go to line # j
3379 } else { // unrecognised cmd
3382 #endif /* !FEATURE_VI_COLON */
3384 case '<': // <- Left shift something
3385 case '>': // >- Right shift something
3386 cnt = count_lines(text, dot); // remember what line we are on
3387 c1 = get_one_char(); // get the type of thing to delete
3388 find_range(&p, &q, c1);
3389 yank_delete(p, q, 1, YANKONLY); // save copy before change
3392 i = count_lines(p, q); // # of lines we are shifting
3393 for ( ; i > 0; i--, p = next_line(p)) {
3395 // shift left- remove tab or 8 spaces
3397 // shrink buffer 1 char
3398 text_hole_delete(p, p);
3399 } else if (*p == ' ') {
3400 // we should be calculating columns, not just SPACE
3401 for (j = 0; *p == ' ' && j < tabstop; j++) {
3402 text_hole_delete(p, p);
3405 } else if (c == '>') {
3406 // shift right -- add tab or 8 spaces
3407 char_insert(p, '\t');
3410 dot = find_line(cnt); // what line were we on
3412 end_cmd_q(); // stop adding to q
3414 case 'A': // A- append at e-o-l
3415 dot_end(); // go to e-o-l
3416 //**** fall thru to ... 'a'
3417 case 'a': // a- append after current char
3422 case 'B': // B- back a blank-delimited Word
3423 case 'E': // E- end of a blank-delimited word
3424 case 'W': // W- forward a blank-delimited word
3431 if (c == 'W' || isspace(dot[dir])) {
3432 dot = skip_thing(dot, 1, dir, S_TO_WS);
3433 dot = skip_thing(dot, 2, dir, S_OVER_WS);
3436 dot = skip_thing(dot, 1, dir, S_BEFORE_WS);
3438 case 'C': // C- Change to e-o-l
3439 case 'D': // D- delete to e-o-l
3441 dot = dollar_line(dot); // move to before NL
3442 // copy text into a register and delete
3443 dot = yank_delete(save_dot, dot, 0, YANKDEL); // delete to e-o-l
3445 goto dc_i; // start inserting
3446 #if ENABLE_FEATURE_VI_DOT_CMD
3448 end_cmd_q(); // stop adding to q
3451 case 'G': // G- goto to a line number (default= E-O-F)
3452 dot = end - 1; // assume E-O-F
3454 dot = find_line(cmdcnt); // what line is #cmdcnt
3458 case 'H': // H- goto top line on screen
3460 if (cmdcnt > (rows - 1)) {
3461 cmdcnt = (rows - 1);
3468 case 'I': // I- insert before first non-blank
3471 //**** fall thru to ... 'i'
3472 case 'i': // i- insert before current char
3473 case VI_K_INSERT: // Cursor Key Insert
3475 cmd_mode = 1; // start insrting
3477 case 'J': // J- join current and next lines together
3481 dot_end(); // move to NL
3482 if (dot < end - 1) { // make sure not last char in text[]
3483 *dot++ = ' '; // replace NL with space
3485 while (isblank(*dot)) { // delete leading WS
3489 end_cmd_q(); // stop adding to q
3491 case 'L': // L- goto bottom line on screen
3493 if (cmdcnt > (rows - 1)) {
3494 cmdcnt = (rows - 1);
3502 case 'M': // M- goto middle line on screen
3504 for (cnt = 0; cnt < (rows-1) / 2; cnt++)
3505 dot = next_line(dot);
3507 case 'O': // O- open a empty line above
3509 p = begin_line(dot);
3510 if (p[-1] == '\n') {
3512 case 'o': // o- open a empty line below; Yes, I know it is in the middle of the "if (..."
3514 dot = char_insert(dot, '\n');
3517 dot = char_insert(dot, '\n'); // i\n ESC
3522 case 'R': // R- continuous Replace char
3526 case 'X': // X- delete char before dot
3527 case 'x': // x- delete the current char
3528 case 's': // s- substitute the current char
3535 if (dot[dir] != '\n') {
3537 dot--; // delete prev char
3538 dot = yank_delete(dot, dot, 0, YANKDEL); // delete char
3541 goto dc_i; // start insrting
3542 end_cmd_q(); // stop adding to q
3544 case 'Z': // Z- if modified, {write}; exit
3545 // ZZ means to save file (if necessary), then exit
3546 c1 = get_one_char();
3551 if (file_modified) {
3552 if (ENABLE_FEATURE_VI_READONLY && readonly_mode) {
3553 psbs("\"%s\" File is read only", current_filename);
3556 cnt = file_write(current_filename, text, end - 1);
3559 psbs("Write error: %s", strerror(errno));
3560 } else if (cnt == (end - 1 - text + 1)) {
3567 case '^': // ^- move to first non-blank on line
3571 case 'b': // b- back a word
3572 case 'e': // e- end of word
3579 if ((dot + dir) < text || (dot + dir) > end - 1)
3582 if (isspace(*dot)) {
3583 dot = skip_thing(dot, (c == 'e') ? 2 : 1, dir, S_OVER_WS);
3585 if (isalnum(*dot) || *dot == '_') {
3586 dot = skip_thing(dot, 1, dir, S_END_ALNUM);
3587 } else if (ispunct(*dot)) {
3588 dot = skip_thing(dot, 1, dir, S_END_PUNCT);
3591 case 'c': // c- change something
3592 case 'd': // d- delete something
3593 #if ENABLE_FEATURE_VI_YANKMARK
3594 case 'y': // y- yank something
3595 case 'Y': // Y- Yank a line
3597 yf = YANKDEL; // assume either "c" or "d"
3598 #if ENABLE_FEATURE_VI_YANKMARK
3599 if (c == 'y' || c == 'Y')
3604 c1 = get_one_char(); // get the type of thing to delete
3605 find_range(&p, &q, c1);
3606 if (c1 == 27) { // ESC- user changed mind and wants out
3607 c = c1 = 27; // Escape- do nothing
3608 } else if (strchr("wW", c1)) {
3610 // don't include trailing WS as part of word
3611 while (isblank(*q)) {
3612 if (q <= text || q[-1] == '\n')
3617 dot = yank_delete(p, q, 0, yf); // delete word
3618 } else if (strchr("^0bBeEft$", c1)) {
3619 // single line copy text into a register and delete
3620 dot = yank_delete(p, q, 0, yf); // delete word
3621 } else if (strchr("cdykjHL%+-{}\r\n", c1)) {
3622 // multiple line copy text into a register and delete
3623 dot = yank_delete(p, q, 1, yf); // delete lines
3625 dot = char_insert(dot, '\n');
3626 // on the last line of file don't move to prev line
3627 if (dot != (end-1)) {
3630 } else if (c == 'd') {
3635 // could not recognize object
3636 c = c1 = 27; // error-
3640 // if CHANGING, not deleting, start inserting after the delete
3642 strcpy(buf, "Change");
3643 goto dc_i; // start inserting
3646 strcpy(buf, "Delete");
3648 #if ENABLE_FEATURE_VI_YANKMARK
3649 if (c == 'y' || c == 'Y') {
3650 strcpy(buf, "Yank");
3654 for (cnt = 0; p <= q; p++) {
3658 psb("%s %d lines (%d chars) using [%c]",
3659 buf, cnt, strlen(reg[YDreg]), what_reg());
3661 end_cmd_q(); // stop adding to q
3664 case 'k': // k- goto prev line, same col
3665 case VI_K_UP: // cursor key Up
3670 dot = move_to_col(dot, ccol + offset); // try stay in same col
3672 case 'r': // r- replace the current char with user input
3673 c1 = get_one_char(); // get the replacement char
3676 file_modified++; // has the file been modified
3678 end_cmd_q(); // stop adding to q
3680 case 't': // t- move to char prior to next x
3681 last_forward_char = get_one_char();
3683 if (*dot == last_forward_char)
3685 last_forward_char= 0;
3687 case 'w': // w- forward a word
3691 if (isalnum(*dot) || *dot == '_') { // we are on ALNUM
3692 dot = skip_thing(dot, 1, FORWARD, S_END_ALNUM);
3693 } else if (ispunct(*dot)) { // we are on PUNCT
3694 dot = skip_thing(dot, 1, FORWARD, S_END_PUNCT);
3697 dot++; // move over word
3698 if (isspace(*dot)) {
3699 dot = skip_thing(dot, 2, FORWARD, S_OVER_WS);
3703 c1 = get_one_char(); // get the replacement char
3706 cnt = (rows - 2) / 2; // put dot at center
3708 cnt = rows - 2; // put dot at bottom
3709 screenbegin = begin_line(dot); // start dot at top
3710 dot_scroll(cnt, -1);
3712 case '|': // |- move to column "cmdcnt"
3713 dot = move_to_col(dot, cmdcnt - 1); // try to move to column
3715 case '~': // ~- flip the case of letters a-z -> A-Z
3719 if (islower(*dot)) {
3720 *dot = toupper(*dot);
3721 file_modified++; // has the file been modified
3722 } else if (isupper(*dot)) {
3723 *dot = tolower(*dot);
3724 file_modified++; // has the file been modified
3727 end_cmd_q(); // stop adding to q
3729 //----- The Cursor and Function Keys -----------------------------
3730 case VI_K_HOME: // Cursor Key Home
3733 // The Fn keys could point to do_macro which could translate them
3734 case VI_K_FUN1: // Function Key F1
3735 case VI_K_FUN2: // Function Key F2
3736 case VI_K_FUN3: // Function Key F3
3737 case VI_K_FUN4: // Function Key F4
3738 case VI_K_FUN5: // Function Key F5
3739 case VI_K_FUN6: // Function Key F6
3740 case VI_K_FUN7: // Function Key F7
3741 case VI_K_FUN8: // Function Key F8
3742 case VI_K_FUN9: // Function Key F9
3743 case VI_K_FUN10: // Function Key F10
3744 case VI_K_FUN11: // Function Key F11
3745 case VI_K_FUN12: // Function Key F12
3750 // if text[] just became empty, add back an empty line
3752 char_insert(text, '\n'); // start empty buf with dummy line
3755 // it is OK for dot to exactly equal to end, otherwise check dot validity
3757 dot = bound_dot(dot); // make sure "dot" is valid
3759 #if ENABLE_FEATURE_VI_YANKMARK
3760 check_context(c); // update the current context
3764 cmdcnt = 0; // cmd was not a number, reset cmdcnt
3765 cnt = dot - begin_line(dot);
3766 // Try to stay off of the Newline
3767 if (*dot == '\n' && cnt > 0 && cmd_mode == 0)
3771 #if ENABLE_FEATURE_VI_CRASHME
3772 static int totalcmds = 0;
3773 static int Mp = 85; // Movement command Probability
3774 static int Np = 90; // Non-movement command Probability
3775 static int Dp = 96; // Delete command Probability
3776 static int Ip = 97; // Insert command Probability
3777 static int Yp = 98; // Yank command Probability
3778 static int Pp = 99; // Put command Probability
3779 static int M = 0, N = 0, I = 0, D = 0, Y = 0, P = 0, U = 0;
3780 const char chars[20] = "\t012345 abcdABCD-=.$";
3781 const char *const words[20] = {
3782 "this", "is", "a", "test",
3783 "broadcast", "the", "emergency", "of",
3784 "system", "quick", "brown", "fox",
3785 "jumped", "over", "lazy", "dogs",
3786 "back", "January", "Febuary", "March"
3788 const char *const lines[20] = {
3789 "You should have received a copy of the GNU General Public License\n",
3790 "char c, cm, *cmd, *cmd1;\n",
3791 "generate a command by percentages\n",
3792 "Numbers may be typed as a prefix to some commands.\n",
3793 "Quit, discarding changes!\n",
3794 "Forced write, if permission originally not valid.\n",
3795 "In general, any ex or ed command (such as substitute or delete).\n",
3796 "I have tickets available for the Blazers vs LA Clippers for Monday, Janurary 1 at 1:00pm.\n",
3797 "Please get w/ me and I will go over it with you.\n",
3798 "The following is a list of scheduled, committed changes.\n",
3799 "1. Launch Norton Antivirus (Start, Programs, Norton Antivirus)\n",
3800 "Reminder....Town Meeting in Central Perk cafe today at 3:00pm.\n",
3801 "Any question about transactions please contact Sterling Huxley.\n",
3802 "I will try to get back to you by Friday, December 31.\n",
3803 "This Change will be implemented on Friday.\n",
3804 "Let me know if you have problems accessing this;\n",
3805 "Sterling Huxley recently added you to the access list.\n",
3806 "Would you like to go to lunch?\n",
3807 "The last command will be automatically run.\n",
3808 "This is too much english for a computer geek.\n",
3810 char *multilines[20] = {
3811 "You should have received a copy of the GNU General Public License\n",
3812 "char c, cm, *cmd, *cmd1;\n",
3813 "generate a command by percentages\n",
3814 "Numbers may be typed as a prefix to some commands.\n",
3815 "Quit, discarding changes!\n",
3816 "Forced write, if permission originally not valid.\n",
3817 "In general, any ex or ed command (such as substitute or delete).\n",
3818 "I have tickets available for the Blazers vs LA Clippers for Monday, Janurary 1 at 1:00pm.\n",
3819 "Please get w/ me and I will go over it with you.\n",
3820 "The following is a list of scheduled, committed changes.\n",
3821 "1. Launch Norton Antivirus (Start, Programs, Norton Antivirus)\n",
3822 "Reminder....Town Meeting in Central Perk cafe today at 3:00pm.\n",
3823 "Any question about transactions please contact Sterling Huxley.\n",
3824 "I will try to get back to you by Friday, December 31.\n",
3825 "This Change will be implemented on Friday.\n",
3826 "Let me know if you have problems accessing this;\n",
3827 "Sterling Huxley recently added you to the access list.\n",
3828 "Would you like to go to lunch?\n",
3829 "The last command will be automatically run.\n",
3830 "This is too much english for a computer geek.\n",
3833 // create a random command to execute
3834 static void crash_dummy()
3836 static int sleeptime; // how long to pause between commands
3837 char c, cm, *cmd, *cmd1;
3838 int i, cnt, thing, rbi, startrbi, percent;
3840 // "dot" movement commands
3841 cmd1 = " \n\r\002\004\005\006\025\0310^$-+wWeEbBhjklHL";
3843 // is there already a command running?
3844 if (readed_for_parse > 0)
3848 sleeptime = 0; // how long to pause between commands
3849 memset(readbuffer, '\0', MAX_LINELEN); // clear the read buffer
3850 // generate a command by percentages
3851 percent = (int) lrand48() % 100; // get a number from 0-99
3852 if (percent < Mp) { // Movement commands
3853 // available commands
3856 } else if (percent < Np) { // non-movement commands
3857 cmd = "mz<>\'\""; // available commands
3859 } else if (percent < Dp) { // Delete commands
3860 cmd = "dx"; // available commands
3862 } else if (percent < Ip) { // Inset commands
3863 cmd = "iIaAsrJ"; // available commands
3865 } else if (percent < Yp) { // Yank commands
3866 cmd = "yY"; // available commands
3868 } else if (percent < Pp) { // Put commands
3869 cmd = "pP"; // available commands
3872 // We do not know how to handle this command, try again
3876 // randomly pick one of the available cmds from "cmd[]"
3877 i = (int) lrand48() % strlen(cmd);
3879 if (strchr(":\024", cm))
3880 goto cd0; // dont allow colon or ctrl-T commands
3881 readbuffer[rbi++] = cm; // put cmd into input buffer
3883 // now we have the command-
3884 // there are 1, 2, and multi char commands
3885 // find out which and generate the rest of command as necessary
3886 if (strchr("dmryz<>\'\"", cm)) { // 2-char commands
3887 cmd1 = " \n\r0$^-+wWeEbBhjklHL";
3888 if (cm == 'm' || cm == '\'' || cm == '\"') { // pick a reg[]
3889 cmd1 = "abcdefghijklmnopqrstuvwxyz";
3891 thing = (int) lrand48() % strlen(cmd1); // pick a movement command
3893 readbuffer[rbi++] = c; // add movement to input buffer
3895 if (strchr("iIaAsc", cm)) { // multi-char commands
3897 // change some thing
3898 thing = (int) lrand48() % strlen(cmd1); // pick a movement command
3900 readbuffer[rbi++] = c; // add movement to input buffer
3902 thing = (int) lrand48() % 4; // what thing to insert
3903 cnt = (int) lrand48() % 10; // how many to insert
3904 for (i = 0; i < cnt; i++) {
3905 if (thing == 0) { // insert chars
3906 readbuffer[rbi++] = chars[((int) lrand48() % strlen(chars))];
3907 } else if (thing == 1) { // insert words
3908 strcat(readbuffer, words[(int) lrand48() % 20]);
3909 strcat(readbuffer, " ");
3910 sleeptime = 0; // how fast to type
3911 } else if (thing == 2) { // insert lines
3912 strcat(readbuffer, lines[(int) lrand48() % 20]);
3913 sleeptime = 0; // how fast to type
3914 } else { // insert multi-lines
3915 strcat(readbuffer, multilines[(int) lrand48() % 20]);
3916 sleeptime = 0; // how fast to type
3919 strcat(readbuffer, "\033");
3921 readed_for_parse = strlen(readbuffer);
3925 mysleep(sleeptime); // sleep 1/100 sec
3928 // test to see if there are any errors
3929 static void crash_test()
3931 static time_t oldtim;
3934 char d[2], msg[MAX_LINELEN];
3938 strcat(msg, "end<text ");
3940 if (end > textend) {
3941 strcat(msg, "end>textend ");
3944 strcat(msg, "dot<text ");
3947 strcat(msg, "dot>end ");
3949 if (screenbegin < text) {
3950 strcat(msg, "screenbegin<text ");
3952 if (screenbegin > end - 1) {
3953 strcat(msg, "screenbegin>end-1 ");
3958 printf("\n\n%d: \'%c\' %s\n\n\n%s[Hit return to continue]%s",
3959 totalcmds, last_input_char, msg, SOs, SOn);
3961 while (safe_read(0, d, 1) > 0) {
3962 if (d[0] == '\n' || d[0] == '\r')
3967 tim = (time_t) time((time_t *) 0);
3968 if (tim >= (oldtim + 3)) {
3969 sprintf(status_buffer,
3970 "Tot=%d: M=%d N=%d I=%d D=%d Y=%d P=%d U=%d size=%d",
3971 totalcmds, M, N, I, D, Y, P, U, end - text + 1);