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
187 char readbuffer[MAX_LINELEN];
189 #define G (*ptr_to_globals)
190 #define text (G.text )
191 #define text_size (G.text_size )
195 #define YDreg (G.YDreg )
196 #define Ureg (G.Ureg )
197 #define mark (G.mark )
198 #define context_start (G.context_start )
199 #define context_end (G.context_end )
200 #define restart (G.restart )
201 #define term_orig (G.term_orig )
202 #define term_vi (G.term_vi )
203 #define initial_cmds (G.initial_cmds )
204 #define readbuffer (G.readbuffer )
205 #define INIT_G() do { \
206 PTR_TO_GLOBALS = xzalloc(sizeof(G)); \
209 static int init_text_buffer(char *); // init from file or create new
210 static void edit_file(char *); // edit one file
211 static void do_cmd(char); // execute a command
212 static int next_tabstop(int);
213 static void sync_cursor(char *, int *, int *); // synchronize the screen cursor to dot
214 static char *begin_line(char *); // return pointer to cur line B-o-l
215 static char *end_line(char *); // return pointer to cur line E-o-l
216 static char *prev_line(char *); // return pointer to prev line B-o-l
217 static char *next_line(char *); // return pointer to next line B-o-l
218 static char *end_screen(void); // get pointer to last char on screen
219 static int count_lines(char *, char *); // count line from start to stop
220 static char *find_line(int); // find begining of line #li
221 static char *move_to_col(char *, int); // move "p" to column l
222 static void dot_left(void); // move dot left- dont leave line
223 static void dot_right(void); // move dot right- dont leave line
224 static void dot_begin(void); // move dot to B-o-l
225 static void dot_end(void); // move dot to E-o-l
226 static void dot_next(void); // move dot to next line B-o-l
227 static void dot_prev(void); // move dot to prev line B-o-l
228 static void dot_scroll(int, int); // move the screen up or down
229 static void dot_skip_over_ws(void); // move dot pat WS
230 static void dot_delete(void); // delete the char at 'dot'
231 static char *bound_dot(char *); // make sure text[0] <= P < "end"
232 static char *new_screen(int, int); // malloc virtual screen memory
233 static char *char_insert(char *, char); // insert the char c at 'p'
234 static char *stupid_insert(char *, char); // stupidly insert the char c at 'p'
235 static char find_range(char **, char **, char); // return pointers for an object
236 static int st_test(char *, int, int, char *); // helper for skip_thing()
237 static char *skip_thing(char *, int, int, int); // skip some object
238 static char *find_pair(char *, char); // find matching pair () [] {}
239 static char *text_hole_delete(char *, char *); // at "p", delete a 'size' byte hole
240 static char *text_hole_make(char *, int); // at "p", make a 'size' byte hole
241 static char *yank_delete(char *, char *, int, int); // yank text[] into register then delete
242 static void show_help(void); // display some help info
243 static void rawmode(void); // set "raw" mode on tty
244 static void cookmode(void); // return to "cooked" mode on tty
245 // sleep for 'h' 1/100 seconds, return 1/0 if stdin is (ready for read)/(not ready)
246 static int mysleep(int);
247 static char readit(void); // read (maybe cursor) key from stdin
248 static char get_one_char(void); // read 1 char from stdin
249 static int file_size(const char *); // what is the byte size of "fn"
250 #if ENABLE_FEATURE_VI_READONLY
251 static int file_insert(const char *, char *, int);
253 static int file_insert(const char *, char *);
255 static int file_write(char *, char *, char *);
256 static void place_cursor(int, int, int);
257 static void screen_erase(void);
258 static void clear_to_eol(void);
259 static void clear_to_eos(void);
260 static void standout_start(void); // send "start reverse video" sequence
261 static void standout_end(void); // send "end reverse video" sequence
262 static void flash(int); // flash the terminal screen
263 static void show_status_line(void); // put a message on the bottom line
264 static void psb(const char *, ...); // Print Status Buf
265 static void psbs(const char *, ...); // Print Status Buf in standout mode
266 static void ni(const char *); // display messages
267 static int format_edit_status(void); // format file status on status line
268 static void redraw(int); // force a full screen refresh
269 static void format_line(char*, char*, int);
270 static void refresh(int); // update the terminal from screen[]
272 static void Indicate_Error(void); // use flash or beep to indicate error
273 #define indicate_error(c) Indicate_Error()
274 static void Hit_Return(void);
276 #if ENABLE_FEATURE_VI_SEARCH
277 static char *char_search(char *, const char *, int, int); // search for pattern starting at p
278 static int mycmp(const char *, const char *, int); // string cmp based in "ignorecase"
280 #if ENABLE_FEATURE_VI_COLON
281 static char *get_one_address(char *, int *); // get colon addr, if present
282 static char *get_address(char *, int *, int *); // get two colon addrs, if present
283 static void colon(char *); // execute the "colon" mode cmds
285 #if ENABLE_FEATURE_VI_USE_SIGNALS
286 static void winch_sig(int); // catch window size changes
287 static void suspend_sig(int); // catch ctrl-Z
288 static void catch_sig(int); // catch ctrl-C and alarm time-outs
290 #if ENABLE_FEATURE_VI_DOT_CMD
291 static void start_new_cmd_q(char); // new queue for command
292 static void end_cmd_q(void); // stop saving input chars
294 #define end_cmd_q() ((void)0)
296 #if ENABLE_FEATURE_VI_SETOPTS
297 static void showmatching(char *); // show the matching pair () [] {}
299 #if ENABLE_FEATURE_VI_YANKMARK || (ENABLE_FEATURE_VI_COLON && ENABLE_FEATURE_VI_SEARCH) || ENABLE_FEATURE_VI_CRASHME
300 static char *string_insert(char *, char *); // insert the string at 'p'
302 #if ENABLE_FEATURE_VI_YANKMARK
303 static char *text_yank(char *, char *, int); // save copy of "p" into a register
304 static char what_reg(void); // what is letter of current YDreg
305 static void check_context(char); // remember context for '' command
307 #if ENABLE_FEATURE_VI_CRASHME
308 static void crash_dummy();
309 static void crash_test();
310 static int crashme = 0;
314 static void write1(const char *out)
319 int vi_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
320 int vi_main(int argc, char **argv)
323 RESERVE_CONFIG_BUFFER(STATUS_BUFFER, STATUS_BUFFER_LEN);
325 #if ENABLE_FEATURE_VI_USE_SIGNALS || ENABLE_FEATURE_VI_CRASHME
331 #if ENABLE_FEATURE_VI_CRASHME
332 srand((long) my_pid);
335 status_buffer = STATUS_BUFFER;
336 last_status_cksum = 0;
339 #ifdef NO_SUCH_APPLET_YET
340 /* If we aren't "vi", we are "view" */
341 if (ENABLE_FEATURE_VI_READONLY && applet_name[2]) {
342 SET_READONLY_MODE(readonly_mode);
346 vi_setops = VI_AUTOINDENT | VI_SHOWMATCH | VI_IGNORECASE;
347 #if ENABLE_FEATURE_VI_YANKMARK
348 memset(reg, 0, sizeof(reg)); // init the yank regs
350 #if ENABLE_FEATURE_VI_DOT_CMD || ENABLE_FEATURE_VI_YANKMARK
351 modifying_cmds = (char *) "aAcCdDiIJoOpPrRsxX<>~"; // cmds modifying text[]
354 // 1- process $HOME/.exrc file (not inplemented yet)
355 // 2- process EXINIT variable from environment
356 // 3- process command line args
357 #if ENABLE_FEATURE_VI_COLON
359 char *p = getenv("EXINIT");
361 initial_cmds[0] = xstrdup(p);
364 while ((c = getopt(argc, argv, "hCR" USE_FEATURE_VI_COLON("c:"))) != -1) {
366 #if ENABLE_FEATURE_VI_CRASHME
371 #if ENABLE_FEATURE_VI_READONLY
372 case 'R': // Read-only flag
373 SET_READONLY_MODE(readonly_mode);
376 //case 'r': // recover flag- ignore- we don't use tmp file
377 //case 'x': // encryption flag- ignore
378 //case 'c': // execute command first
379 #if ENABLE_FEATURE_VI_COLON
380 case 'c': // cmd line vi command
382 initial_cmds[initial_cmds[0] != 0] = xstrdup(optarg);
384 //case 'h': // help -- just use default
392 // The argv array can be used by the ":next" and ":rewind" commands
394 fn_start = optind; // remember first file name for :next and :rew
397 //----- This is the main file handling loop --------------
398 if (optind >= argc) {
401 for (; optind < argc; optind++) {
402 edit_file(argv[optind]);
405 //-----------------------------------------------------------
410 /* read text from file or create an empty buf */
411 /* will also update current_filename */
412 static int init_text_buffer(char *fn)
415 int size = file_size(fn); // file size. -1 means does not exist.
417 /* allocate/reallocate text buffer */
419 text_size = size * 2;
420 if (text_size < 10240)
421 text_size = 10240; // have a minimum size for new files
422 screenbegin = dot = end = text = xzalloc(text_size);
424 if (fn != current_filename) {
425 free(current_filename);
426 current_filename = xstrdup(fn);
429 // file dont exist. Start empty buf with dummy line
430 char_insert(text, '\n');
433 rc = file_insert(fn, text
434 USE_FEATURE_VI_READONLY(, 1));
437 last_file_modified = -1;
438 #if ENABLE_FEATURE_VI_YANKMARK
439 /* init the marks. */
440 memset(mark, 0, sizeof(mark));
445 static void edit_file(char * fn)
450 #if ENABLE_FEATURE_VI_USE_SIGNALS
453 #if ENABLE_FEATURE_VI_YANKMARK
454 static char *cur_line;
457 editing = 1; // 0= exit, 1= one file, 2= multiple files
462 if (ENABLE_FEATURE_VI_WIN_RESIZE)
463 get_terminal_width_height(0, &columns, &rows);
464 new_screen(rows, columns); // get memory for virtual screen
465 init_text_buffer(fn);
467 #if ENABLE_FEATURE_VI_YANKMARK
468 YDreg = 26; // default Yank/Delete reg
469 Ureg = 27; // hold orig line for "U" cmd
470 mark[26] = mark[27] = text; // init "previous context"
473 last_forward_char = last_input_char = '\0';
477 #if ENABLE_FEATURE_VI_USE_SIGNALS
479 signal(SIGWINCH, winch_sig);
480 signal(SIGTSTP, suspend_sig);
481 sig = setjmp(restart);
483 screenbegin = dot = text;
487 cmd_mode = 0; // 0=command 1=insert 2='R'eplace
490 offset = 0; // no horizontal offset
492 #if ENABLE_FEATURE_VI_DOT_CMD
493 free(last_modifying_cmd);
495 ioq = ioq_start = last_modifying_cmd = NULL;
498 redraw(FALSE); // dont force every col re-draw
500 #if ENABLE_FEATURE_VI_COLON
505 while ((p = initial_cmds[n])) {
515 free(initial_cmds[n]);
516 initial_cmds[n] = NULL;
521 //------This is the main Vi cmd handling loop -----------------------
522 while (editing > 0) {
523 #if ENABLE_FEATURE_VI_CRASHME
525 if ((end - text) > 1) {
526 crash_dummy(); // generate a random command
529 dot = string_insert(text, "\n\n##### Ran out of text to work on. #####\n\n"); // insert the string
534 last_input_char = c = get_one_char(); // get a cmd from user
535 #if ENABLE_FEATURE_VI_YANKMARK
536 // save a copy of the current line- for the 'U" command
537 if (begin_line(dot) != cur_line) {
538 cur_line = begin_line(dot);
539 text_yank(begin_line(dot), end_line(dot), Ureg);
542 #if ENABLE_FEATURE_VI_DOT_CMD
543 // These are commands that change text[].
544 // Remember the input for the "." command
545 if (!adding2q && ioq_start == 0
546 && strchr(modifying_cmds, c)
551 do_cmd(c); // execute the user command
553 // poll to see if there is input already waiting. if we are
554 // not able to display output fast enough to keep up, skip
555 // the display update until we catch up with input.
556 if (mysleep(0) == 0) {
557 // no input pending- so update output
561 #if ENABLE_FEATURE_VI_CRASHME
563 crash_test(); // test editor variables
566 //-------------------------------------------------------------------
568 place_cursor(rows, 0, FALSE); // go to bottom of screen
569 clear_to_eol(); // Erase to end of line
573 //----- The Colon commands -------------------------------------
574 #if ENABLE_FEATURE_VI_COLON
575 static char *get_one_address(char * p, int *addr) // get colon addr, if present
580 #if ENABLE_FEATURE_VI_YANKMARK
583 #if ENABLE_FEATURE_VI_SEARCH
584 char *pat, buf[MAX_LINELEN];
587 *addr = -1; // assume no addr
588 if (*p == '.') { // the current line
591 *addr = count_lines(text, q);
592 #if ENABLE_FEATURE_VI_YANKMARK
593 } else if (*p == '\'') { // is this a mark addr
597 if (c >= 'a' && c <= 'z') {
600 q = mark[(unsigned char) c];
601 if (q != NULL) { // is mark valid
602 *addr = count_lines(text, q); // count lines
606 #if ENABLE_FEATURE_VI_SEARCH
607 } else if (*p == '/') { // a search pattern
615 pat = xstrdup(buf); // save copy of pattern
618 q = char_search(dot, pat, FORWARD, FULL);
620 *addr = count_lines(text, q);
624 } else if (*p == '$') { // the last line in file
626 q = begin_line(end - 1);
627 *addr = count_lines(text, q);
628 } else if (isdigit(*p)) { // specific line number
629 sscanf(p, "%d%n", addr, &st);
631 } else { // I don't reconise this
632 // unrecognised address- assume -1
638 static char *get_address(char *p, int *b, int *e) // get two colon addrs, if present
640 //----- get the address' i.e., 1,3 'a,'b -----
641 // get FIRST addr, if present
643 p++; // skip over leading spaces
644 if (*p == '%') { // alias for 1,$
647 *e = count_lines(text, end-1);
650 p = get_one_address(p, b);
653 if (*p == ',') { // is there a address separator
657 // get SECOND addr, if present
658 p = get_one_address(p, e);
662 p++; // skip over trailing spaces
666 #if ENABLE_FEATURE_VI_SET && ENABLE_FEATURE_VI_SETOPTS
667 static void setops(const char *args, const char *opname, int flg_no,
668 const char *short_opname, int opt)
670 const char *a = args + flg_no;
671 int l = strlen(opname) - 1; /* opname have + ' ' */
673 if (strncasecmp(a, opname, l) == 0
674 || strncasecmp(a, short_opname, 2) == 0
684 static void colon(char * buf)
686 char c, *orig_buf, *buf1, *q, *r;
687 char *fn, cmd[MAX_LINELEN], args[MAX_LINELEN];
688 int i, l, li, ch, b, e;
689 int useforce = FALSE, forced = FALSE;
691 // :3154 // if (-e line 3154) goto it else stay put
692 // :4,33w! foo // write a portion of buffer to file "foo"
693 // :w // write all of buffer to current file
695 // :q! // quit- dont care about modified file
696 // :'a,'z!sort -u // filter block through sort
697 // :'f // goto mark "f"
698 // :'fl // list literal the mark "f" line
699 // :.r bar // read file "bar" into buffer before dot
700 // :/123/,/abc/d // delete lines from "123" line to "abc" line
701 // :/xyz/ // goto the "xyz" line
702 // :s/find/replace/ // substitute pattern "find" with "replace"
703 // :!<cmd> // run <cmd> then return
709 buf++; // move past the ':'
713 q = text; // assume 1,$ for the range
715 li = count_lines(text, end - 1);
716 fn = current_filename; // default to current file
717 memset(cmd, '\0', MAX_LINELEN); // clear cmd[]
718 memset(args, '\0', MAX_LINELEN); // clear args[]
720 // look for optional address(es) :. :1 :1,9 :'q,'a :%
721 buf = get_address(buf, &b, &e);
723 // remember orig command line
726 // get the COMMAND into cmd[]
728 while (*buf != '\0') {
734 while (isblank(*buf))
737 buf1 = last_char_is(cmd, '!');
740 *buf1 = '\0'; // get rid of !
743 // if there is only one addr, then the addr
744 // is the line number of the single line the
745 // user wants. So, reset the end
746 // pointer to point at end of the "b" line
747 q = find_line(b); // what line is #b
752 // we were given two addrs. change the
753 // end pointer to the addr given by user.
754 r = find_line(e); // what line is #e
758 // ------------ now look for the command ------------
760 if (i == 0) { // :123CR goto line #123
762 dot = find_line(b); // what line is #b
766 #if ENABLE_FEATURE_ALLOW_EXEC
767 else if (strncmp(cmd, "!", 1) == 0) { // run a cmd
769 // :!ls run the <cmd>
770 alarm(0); // wait for input- no alarms
771 place_cursor(rows - 1, 0, FALSE); // go to Status line
772 clear_to_eol(); // clear the line
774 retcode = system(orig_buf + 1); // run the cmd
776 printf("\nshell returned %i\n\n", retcode);
778 Hit_Return(); // let user see results
779 alarm(3); // done waiting for input
782 else if (strncmp(cmd, "=", i) == 0) { // where is the address
783 if (b < 0) { // no addr given- use defaults
784 b = e = count_lines(text, dot);
787 } else if (strncasecmp(cmd, "delete", i) == 0) { // delete lines
788 if (b < 0) { // no addr given- use defaults
789 q = begin_line(dot); // assume .,. for the range
792 dot = yank_delete(q, r, 1, YANKDEL); // save, then delete lines
794 } else if (strncasecmp(cmd, "edit", i) == 0) { // Edit a file
795 // don't edit, if the current file has been modified
796 if (file_modified && ! useforce) {
797 psbs("No write since last change (:edit! overrides)");
801 // the user supplied a file name
803 } else if (current_filename && current_filename[0]) {
804 // no user supplied name- use the current filename
805 // fn = current_filename; was set by default
807 // no user file name, no current name- punt
808 psbs("No current filename");
812 if (init_text_buffer(fn) < 0)
815 #if ENABLE_FEATURE_VI_YANKMARK
816 if (Ureg >= 0 && Ureg < 28 && reg[Ureg] != 0) {
817 free(reg[Ureg]); // free orig line reg- for 'U'
820 if (YDreg >= 0 && YDreg < 28 && reg[YDreg] != 0) {
821 free(reg[YDreg]); // free default yank/delete register
825 // how many lines in text[]?
826 li = count_lines(text, end - 1);
828 USE_FEATURE_VI_READONLY("%s")
829 " %dL, %dC", current_filename,
830 (file_size(fn) < 0 ? " [New file]" : ""),
831 USE_FEATURE_VI_READONLY(
832 ((readonly_mode) ? " [Readonly]" : ""),
835 } else if (strncasecmp(cmd, "file", i) == 0) { // what File is this
836 if (b != -1 || e != -1) {
837 ni("No address allowed on this command");
841 // user wants a new filename
842 free(current_filename);
843 current_filename = xstrdup(args);
845 // user wants file status info
846 last_status_cksum = 0; // force status update
848 } else if (strncasecmp(cmd, "features", i) == 0) { // what features are available
849 // print out values of all features
850 place_cursor(rows - 1, 0, FALSE); // go to Status line, bottom of screen
851 clear_to_eol(); // clear the line
856 } else if (strncasecmp(cmd, "list", i) == 0) { // literal print line
857 if (b < 0) { // no addr given- use defaults
858 q = begin_line(dot); // assume .,. for the range
861 place_cursor(rows - 1, 0, FALSE); // go to Status line, bottom of screen
862 clear_to_eol(); // clear the line
864 for (; q <= r; q++) {
868 c_is_no_print = (c & 0x80) && !Isprint(c);
875 } else if (c < ' ' || c == 127) {
886 #if ENABLE_FEATURE_VI_SET
890 } else if (strncasecmp(cmd, "quit", i) == 0 // Quit
891 || strncasecmp(cmd, "next", i) == 0 // edit next file
894 // force end of argv list
901 // don't exit if the file been modified
903 psbs("No write since last change (:%s! overrides)",
904 (*cmd == 'q' ? "quit" : "next"));
907 // are there other file to edit
908 if (*cmd == 'q' && optind < save_argc - 1) {
909 psbs("%d more file to edit", (save_argc - optind - 1));
912 if (*cmd == 'n' && optind >= save_argc - 1) {
913 psbs("No more files to edit");
917 } else if (strncasecmp(cmd, "read", i) == 0) { // read file into text[]
920 psbs("No filename given");
923 if (b < 0) { // no addr given- use defaults
924 q = begin_line(dot); // assume "dot"
926 // read after current line- unless user said ":0r foo"
929 ch = file_insert(fn, q USE_FEATURE_VI_READONLY(, 0));
931 goto vc1; // nothing was inserted
932 // how many lines in text[]?
933 li = count_lines(q, q + ch - 1);
935 USE_FEATURE_VI_READONLY("%s")
937 USE_FEATURE_VI_READONLY((readonly_mode ? " [Readonly]" : ""),)
940 // if the insert is before "dot" then we need to update
945 } else if (strncasecmp(cmd, "rewind", i) == 0) { // rewind cmd line args
946 if (file_modified && ! useforce) {
947 psbs("No write since last change (:rewind! overrides)");
949 // reset the filenames to edit
950 optind = fn_start - 1;
953 #if ENABLE_FEATURE_VI_SET
954 } else if (strncasecmp(cmd, "set", i) == 0) { // set or clear features
955 #if ENABLE_FEATURE_VI_SETOPTS
958 i = 0; // offset into args
959 // only blank is regarded as args delmiter. What about tab '\t' ?
960 if (!args[0] || strcasecmp(args, "all") == 0) {
961 // print out values of all options
962 place_cursor(rows - 1, 0, FALSE); // go to Status line, bottom of screen
963 clear_to_eol(); // clear the line
964 printf("----------------------------------------\r\n");
965 #if ENABLE_FEATURE_VI_SETOPTS
968 printf("autoindent ");
974 printf("ignorecase ");
977 printf("showmatch ");
978 printf("tabstop=%d ", tabstop);
983 #if ENABLE_FEATURE_VI_SETOPTS
986 if (strncasecmp(argp, "no", 2) == 0)
987 i = 2; // ":set noautoindent"
988 setops(argp, "autoindent ", i, "ai", VI_AUTOINDENT);
989 setops(argp, "flash ", i, "fl", VI_ERR_METHOD);
990 setops(argp, "ignorecase ", i, "ic", VI_IGNORECASE);
991 setops(argp, "showmatch ", i, "ic", VI_SHOWMATCH);
993 if (strncasecmp(argp + i, "tabstop=%d ", 7) == 0) {
994 sscanf(strchr(argp + i, '='), "tabstop=%d" + 7, &ch);
995 if (ch > 0 && ch < columns - 1)
998 while (*argp && *argp != ' ')
999 argp++; // skip to arg delimiter (i.e. blank)
1000 while (*argp && *argp == ' ')
1001 argp++; // skip all delimiting blanks
1003 #endif /* FEATURE_VI_SETOPTS */
1004 #endif /* FEATURE_VI_SET */
1005 #if ENABLE_FEATURE_VI_SEARCH
1006 } else if (strncasecmp(cmd, "s", 1) == 0) { // substitute a pattern with a replacement pattern
1010 // F points to the "find" pattern
1011 // R points to the "replace" pattern
1012 // replace the cmd line delimiters "/" with NULLs
1013 gflag = 0; // global replace flag
1014 c = orig_buf[1]; // what is the delimiter
1015 F = orig_buf + 2; // start of "find"
1016 R = strchr(F, c); // middle delimiter
1017 if (!R) goto colon_s_fail;
1018 *R++ = '\0'; // terminate "find"
1019 buf1 = strchr(R, c);
1020 if (!buf1) goto colon_s_fail;
1021 *buf1++ = '\0'; // terminate "replace"
1022 if (*buf1 == 'g') { // :s/foo/bar/g
1024 gflag++; // turn on gflag
1027 if (b < 0) { // maybe :s/foo/bar/
1028 q = begin_line(dot); // start with cur line
1029 b = count_lines(text, q); // cur line number
1032 e = b; // maybe :.s/foo/bar/
1033 for (i = b; i <= e; i++) { // so, :20,23 s \0 find \0 replace \0
1034 ls = q; // orig line start
1036 buf1 = char_search(q, F, FORWARD, LIMITED); // search cur line only for "find"
1038 // we found the "find" pattern - delete it
1039 text_hole_delete(buf1, buf1 + strlen(F) - 1);
1040 // inset the "replace" patern
1041 string_insert(buf1, R); // insert the string
1042 // check for "global" :s/foo/bar/g
1044 if ((buf1 + strlen(R)) < end_line(ls)) {
1045 q = buf1 + strlen(R);
1046 goto vc4; // don't let q move past cur line
1052 #endif /* FEATURE_VI_SEARCH */
1053 } else if (strncasecmp(cmd, "version", i) == 0) { // show software version
1054 psb("%s", BB_VER " " BB_BT);
1055 } else if (strncasecmp(cmd, "write", i) == 0 // write text to file
1056 || strncasecmp(cmd, "wq", i) == 0
1057 || strncasecmp(cmd, "wn", i) == 0
1058 || strncasecmp(cmd, "x", i) == 0
1060 // is there a file name to write to?
1064 #if ENABLE_FEATURE_VI_READONLY
1065 if (readonly_mode && !useforce) {
1066 psbs("\"%s\" File is read only", fn);
1070 // how many lines in text[]?
1071 li = count_lines(q, r);
1073 // see if file exists- if not, its just a new file request
1075 // if "fn" is not write-able, chmod u+w
1076 // sprintf(syscmd, "chmod u+w %s", fn);
1080 l = file_write(fn, q, r);
1081 if (useforce && forced) {
1083 // sprintf(syscmd, "chmod u-w %s", fn);
1089 psbs("\"%s\" %s", fn, strerror(errno));
1091 psb("\"%s\" %dL, %dC", fn, li, l);
1092 if (q == text && r == end - 1 && l == ch) {
1094 last_file_modified = -1;
1096 if ((cmd[0] == 'x' || cmd[1] == 'q' || cmd[1] == 'n' ||
1097 cmd[0] == 'X' || cmd[1] == 'Q' || cmd[1] == 'N')
1102 #if ENABLE_FEATURE_VI_READONLY
1105 #if ENABLE_FEATURE_VI_YANKMARK
1106 } else if (strncasecmp(cmd, "yank", i) == 0) { // yank lines
1107 if (b < 0) { // no addr given- use defaults
1108 q = begin_line(dot); // assume .,. for the range
1111 text_yank(q, r, YDreg);
1112 li = count_lines(q, r);
1113 psb("Yank %d lines (%d chars) into [%c]",
1114 li, strlen(reg[YDreg]), what_reg());
1121 dot = bound_dot(dot); // make sure "dot" is valid
1123 #if ENABLE_FEATURE_VI_SEARCH
1125 psb(":s expression missing delimiters");
1129 #endif /* FEATURE_VI_COLON */
1131 static void Hit_Return(void)
1135 standout_start(); // start reverse video
1136 write1("[Hit return to continue]");
1137 standout_end(); // end reverse video
1138 while ((c = get_one_char()) != '\n' && c != '\r') /*do nothing */
1140 redraw(TRUE); // force redraw all
1143 static int next_tabstop(int col)
1145 return col + ((tabstop - 1) - (col % tabstop));
1148 //----- Synchronize the cursor to Dot --------------------------
1149 static void sync_cursor(char * d, int *row, int *col)
1151 char *beg_cur; // begin and end of "d" line
1152 char *end_scr; // begin and end of screen
1156 beg_cur = begin_line(d); // first char of cur line
1158 end_scr = end_screen(); // last char of screen
1160 if (beg_cur < screenbegin) {
1161 // "d" is before top line on screen
1162 // how many lines do we have to move
1163 cnt = count_lines(beg_cur, screenbegin);
1165 screenbegin = beg_cur;
1166 if (cnt > (rows - 1) / 2) {
1167 // we moved too many lines. put "dot" in middle of screen
1168 for (cnt = 0; cnt < (rows - 1) / 2; cnt++) {
1169 screenbegin = prev_line(screenbegin);
1172 } else if (beg_cur > end_scr) {
1173 // "d" is after bottom line on screen
1174 // how many lines do we have to move
1175 cnt = count_lines(end_scr, beg_cur);
1176 if (cnt > (rows - 1) / 2)
1177 goto sc1; // too many lines
1178 for (ro = 0; ro < cnt - 1; ro++) {
1179 // move screen begin the same amount
1180 screenbegin = next_line(screenbegin);
1181 // now, move the end of screen
1182 end_scr = next_line(end_scr);
1183 end_scr = end_line(end_scr);
1186 // "d" is on screen- find out which row
1188 for (ro = 0; ro < rows - 1; ro++) { // drive "ro" to correct row
1194 // find out what col "d" is on
1196 do { // drive "co" to correct column
1197 if (*tp == '\n' || *tp == '\0')
1200 if (d == tp && cmd_mode) { /* handle tabs like real vi */
1203 co = next_tabstop(co);
1205 } else if (*tp < ' ' || *tp == 127) {
1206 co++; // display as ^X, use 2 columns
1208 } while (tp++ < d && ++co);
1210 // "co" is the column where "dot" is.
1211 // The screen has "columns" columns.
1212 // The currently displayed columns are 0+offset -- columns+ofset
1213 // |-------------------------------------------------------------|
1215 // offset | |------- columns ----------------|
1217 // If "co" is already in this range then we do not have to adjust offset
1218 // but, we do have to subtract the "offset" bias from "co".
1219 // If "co" is outside this range then we have to change "offset".
1220 // If the first char of a line is a tab the cursor will try to stay
1221 // in column 7, but we have to set offset to 0.
1223 if (co < 0 + offset) {
1226 if (co >= columns + offset) {
1227 offset = co - columns + 1;
1229 // if the first char of the line is a tab, and "dot" is sitting on it
1230 // force offset to 0.
1231 if (d == beg_cur && *d == '\t') {
1240 //----- Text Movement Routines ---------------------------------
1241 static char *begin_line(char * p) // return pointer to first char cur line
1243 while (p > text && p[-1] != '\n')
1244 p--; // go to cur line B-o-l
1248 static char *end_line(char * p) // return pointer to NL of cur line line
1250 while (p < end - 1 && *p != '\n')
1251 p++; // go to cur line E-o-l
1255 static inline char *dollar_line(char * p) // return pointer to just before NL line
1257 while (p < end - 1 && *p != '\n')
1258 p++; // go to cur line E-o-l
1259 // Try to stay off of the Newline
1260 if (*p == '\n' && (p - begin_line(p)) > 0)
1265 static char *prev_line(char * p) // return pointer first char prev line
1267 p = begin_line(p); // goto begining of cur line
1268 if (p[-1] == '\n' && p > text)
1269 p--; // step to prev line
1270 p = begin_line(p); // goto begining of prev line
1274 static char *next_line(char * p) // return pointer first char next line
1277 if (*p == '\n' && p < end - 1)
1278 p++; // step to next line
1282 //----- Text Information Routines ------------------------------
1283 static char *end_screen(void)
1288 // find new bottom line
1290 for (cnt = 0; cnt < rows - 2; cnt++)
1296 static int count_lines(char * start, char * stop) // count line from start to stop
1301 if (stop < start) { // start and stop are backwards- reverse them
1307 stop = end_line(stop); // get to end of this line
1308 for (q = start; q <= stop && q <= end - 1; q++) {
1315 static char *find_line(int li) // find begining of line #li
1319 for (q = text; li > 1; li--) {
1325 //----- Dot Movement Routines ----------------------------------
1326 static void dot_left(void)
1328 if (dot > text && dot[-1] != '\n')
1332 static void dot_right(void)
1334 if (dot < end - 1 && *dot != '\n')
1338 static void dot_begin(void)
1340 dot = begin_line(dot); // return pointer to first char cur line
1343 static void dot_end(void)
1345 dot = end_line(dot); // return pointer to last char cur line
1348 static char *move_to_col(char * p, int l)
1355 if (*p == '\n' || *p == '\0')
1358 co = next_tabstop(co);
1359 } else if (*p < ' ' || *p == 127) {
1360 co++; // display as ^X, use 2 columns
1362 } while (++co <= l && p++ < end);
1366 static void dot_next(void)
1368 dot = next_line(dot);
1371 static void dot_prev(void)
1373 dot = prev_line(dot);
1376 static void dot_scroll(int cnt, int dir)
1380 for (; cnt > 0; cnt--) {
1383 // ctrl-Y scroll up one line
1384 screenbegin = prev_line(screenbegin);
1387 // ctrl-E scroll down one line
1388 screenbegin = next_line(screenbegin);
1391 // make sure "dot" stays on the screen so we dont scroll off
1392 if (dot < screenbegin)
1394 q = end_screen(); // find new bottom line
1396 dot = begin_line(q); // is dot is below bottom line?
1400 static void dot_skip_over_ws(void)
1403 while (isspace(*dot) && *dot != '\n' && dot < end - 1)
1407 static void dot_delete(void) // delete the char at 'dot'
1409 text_hole_delete(dot, dot);
1412 static char *bound_dot(char * p) // make sure text[0] <= P < "end"
1414 if (p >= end && end > text) {
1416 indicate_error('1');
1420 indicate_error('2');
1425 //----- Helper Utility Routines --------------------------------
1427 //----------------------------------------------------------------
1428 //----- Char Routines --------------------------------------------
1429 /* Chars that are part of a word-
1430 * 0123456789_ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz
1431 * Chars that are Not part of a word (stoppers)
1432 * !"#$%&'()*+,-./:;<=>?@[\]^`{|}~
1433 * Chars that are WhiteSpace
1434 * TAB NEWLINE VT FF RETURN SPACE
1435 * DO NOT COUNT NEWLINE AS WHITESPACE
1438 static char *new_screen(int ro, int co)
1443 screensize = ro * co + 8;
1444 screen = xmalloc(screensize);
1445 // initialize the new screen. assume this will be a empty file.
1447 // non-existent text[] lines start with a tilde (~).
1448 for (li = 1; li < ro - 1; li++) {
1449 screen[(li * co) + 0] = '~';
1454 #if ENABLE_FEATURE_VI_SEARCH
1455 static int mycmp(const char * s1, const char * s2, int len)
1459 i = strncmp(s1, s2, len);
1460 if (ENABLE_FEATURE_VI_SETOPTS && ignorecase) {
1461 i = strncasecmp(s1, s2, len);
1466 // search for pattern starting at p
1467 static char *char_search(char * p, const char * pat, int dir, int range)
1469 #ifndef REGEX_SEARCH
1474 if (dir == FORWARD) {
1475 stop = end - 1; // assume range is p - end-1
1476 if (range == LIMITED)
1477 stop = next_line(p); // range is to next line
1478 for (start = p; start < stop; start++) {
1479 if (mycmp(start, pat, len) == 0) {
1483 } else if (dir == BACK) {
1484 stop = text; // assume range is text - p
1485 if (range == LIMITED)
1486 stop = prev_line(p); // range is to prev line
1487 for (start = p - len; start >= stop; start--) {
1488 if (mycmp(start, pat, len) == 0) {
1493 // pattern not found
1495 #else /* REGEX_SEARCH */
1497 struct re_pattern_buffer preg;
1501 re_syntax_options = RE_SYNTAX_POSIX_EXTENDED;
1507 // assume a LIMITED forward search
1515 // count the number of chars to search over, forward or backward
1519 // RANGE could be negative if we are searching backwards
1522 q = re_compile_pattern(pat, strlen(pat), &preg);
1524 // The pattern was not compiled
1525 psbs("bad search pattern: \"%s\": %s", pat, q);
1526 i = 0; // return p if pattern not compiled
1536 // search for the compiled pattern, preg, in p[]
1537 // range < 0- search backward
1538 // range > 0- search forward
1540 // re_search() < 0 not found or error
1541 // re_search() > 0 index of found pattern
1542 // struct pattern char int int int struct reg
1543 // re_search (*pattern_buffer, *string, size, start, range, *regs)
1544 i = re_search(&preg, q, size, 0, range, 0);
1547 i = 0; // return NULL if pattern not found
1550 if (dir == FORWARD) {
1556 #endif /* REGEX_SEARCH */
1558 #endif /* FEATURE_VI_SEARCH */
1560 static char *char_insert(char * p, char c) // insert the char c at 'p'
1562 if (c == 22) { // Is this an ctrl-V?
1563 p = stupid_insert(p, '^'); // use ^ to indicate literal next
1564 p--; // backup onto ^
1565 refresh(FALSE); // show the ^
1569 file_modified++; // has the file been modified
1570 } else if (c == 27) { // Is this an ESC?
1573 end_cmd_q(); // stop adding to q
1574 last_status_cksum = 0; // force status update
1575 if ((p[-1] != '\n') && (dot > text)) {
1578 } else if (c == erase_char || c == 8 || c == 127) { // Is this a BS
1580 if ((p[-1] != '\n') && (dot>text)) {
1582 p = text_hole_delete(p, p); // shrink buffer 1 char
1585 // insert a char into text[]
1586 char *sp; // "save p"
1589 c = '\n'; // translate \r to \n
1590 sp = p; // remember addr of insert
1591 p = stupid_insert(p, c); // insert the char
1592 #if ENABLE_FEATURE_VI_SETOPTS
1593 if (showmatch && strchr(")]}", *sp) != NULL) {
1596 if (autoindent && c == '\n') { // auto indent the new line
1599 q = prev_line(p); // use prev line as templet
1600 for (; isblank(*q); q++) {
1601 p = stupid_insert(p, *q); // insert the char
1609 static char *stupid_insert(char * p, char c) // stupidly insert the char c at 'p'
1611 p = text_hole_make(p, 1);
1614 file_modified++; // has the file been modified
1620 static char find_range(char ** start, char ** stop, char c)
1622 char *save_dot, *p, *q;
1628 if (strchr("cdy><", c)) {
1629 // these cmds operate on whole lines
1630 p = q = begin_line(p);
1631 for (cnt = 1; cnt < cmdcnt; cnt++) {
1635 } else if (strchr("^%$0bBeEft", c)) {
1636 // These cmds operate on char positions
1637 do_cmd(c); // execute movement cmd
1639 } else if (strchr("wW", c)) {
1640 do_cmd(c); // execute movement cmd
1641 // if we are at the next word's first char
1642 // step back one char
1643 // but check the possibilities when it is true
1644 if (dot > text && ((isspace(dot[-1]) && !isspace(dot[0]))
1645 || (ispunct(dot[-1]) && !ispunct(dot[0]))
1646 || (isalnum(dot[-1]) && !isalnum(dot[0]))))
1647 dot--; // move back off of next word
1648 if (dot > text && *dot == '\n')
1649 dot--; // stay off NL
1651 } else if (strchr("H-k{", c)) {
1652 // these operate on multi-lines backwards
1653 q = end_line(dot); // find NL
1654 do_cmd(c); // execute movement cmd
1657 } else if (strchr("L+j}\r\n", c)) {
1658 // these operate on multi-lines forwards
1659 p = begin_line(dot);
1660 do_cmd(c); // execute movement cmd
1661 dot_end(); // find NL
1664 c = 27; // error- return an ESC char
1677 static int st_test(char * p, int type, int dir, char * tested)
1687 if (type == S_BEFORE_WS) {
1689 test = ((!isspace(c)) || c == '\n');
1691 if (type == S_TO_WS) {
1693 test = ((!isspace(c)) || c == '\n');
1695 if (type == S_OVER_WS) {
1697 test = ((isspace(c)));
1699 if (type == S_END_PUNCT) {
1701 test = ((ispunct(c)));
1703 if (type == S_END_ALNUM) {
1705 test = ((isalnum(c)) || c == '_');
1711 static char *skip_thing(char * p, int linecnt, int dir, int type)
1715 while (st_test(p, type, dir, &c)) {
1716 // make sure we limit search to correct number of lines
1717 if (c == '\n' && --linecnt < 1)
1719 if (dir >= 0 && p >= end - 1)
1721 if (dir < 0 && p <= text)
1723 p += dir; // move to next char
1728 // find matching char of pair () [] {}
1729 static char *find_pair(char * p, const char c)
1736 dir = 1; // assume forward
1760 for (q = p + dir; text <= q && q < end; q += dir) {
1761 // look for match, count levels of pairs (( ))
1763 level++; // increase pair levels
1765 level--; // reduce pair level
1767 break; // found matching pair
1770 q = NULL; // indicate no match
1774 #if ENABLE_FEATURE_VI_SETOPTS
1775 // show the matching char of a pair, () [] {}
1776 static void showmatching(char * p)
1780 // we found half of a pair
1781 q = find_pair(p, *p); // get loc of matching char
1783 indicate_error('3'); // no matching char
1785 // "q" now points to matching pair
1786 save_dot = dot; // remember where we are
1787 dot = q; // go to new loc
1788 refresh(FALSE); // let the user see it
1789 mysleep(40); // give user some time
1790 dot = save_dot; // go back to old loc
1794 #endif /* FEATURE_VI_SETOPTS */
1796 // open a hole in text[]
1797 static char *text_hole_make(char * p, int size) // at "p", make a 'size' byte hole
1806 cnt = end - src; // the rest of buffer
1807 if ( ((end + size) >= (text + text_size)) // TODO: realloc here
1808 || memmove(dest, src, cnt) != dest) {
1809 psbs("can't create room for new characters");
1813 memset(p, ' ', size); // clear new hole
1814 end += size; // adjust the new END
1815 file_modified++; // has the file been modified
1820 // close a hole in text[]
1821 static char *text_hole_delete(char * p, char * q) // delete "p" thru "q", inclusive
1826 // move forwards, from beginning
1830 if (q < p) { // they are backward- swap them
1834 hole_size = q - p + 1;
1836 if (src < text || src > end)
1838 if (dest < text || dest >= end)
1841 goto thd_atend; // just delete the end of the buffer
1842 if (memmove(dest, src, cnt) != dest) {
1843 psbs("can't delete the character");
1846 end = end - hole_size; // adjust the new END
1848 dest = end - 1; // make sure dest in below end-1
1850 dest = end = text; // keep pointers valid
1851 file_modified++; // has the file been modified
1856 // copy text into register, then delete text.
1857 // if dist <= 0, do not include, or go past, a NewLine
1859 static char *yank_delete(char * start, char * stop, int dist, int yf)
1863 // make sure start <= stop
1865 // they are backwards, reverse them
1871 // we cannot cross NL boundaries
1875 // dont go past a NewLine
1876 for (; p + 1 <= stop; p++) {
1878 stop = p; // "stop" just before NewLine
1884 #if ENABLE_FEATURE_VI_YANKMARK
1885 text_yank(start, stop, YDreg);
1887 if (yf == YANKDEL) {
1888 p = text_hole_delete(start, stop);
1893 static void show_help(void)
1895 puts("These features are available:"
1896 #if ENABLE_FEATURE_VI_SEARCH
1897 "\n\tPattern searches with / and ?"
1899 #if ENABLE_FEATURE_VI_DOT_CMD
1900 "\n\tLast command repeat with \'.\'"
1902 #if ENABLE_FEATURE_VI_YANKMARK
1903 "\n\tLine marking with 'x"
1904 "\n\tNamed buffers with \"x"
1906 #if ENABLE_FEATURE_VI_READONLY
1907 "\n\tReadonly if vi is called as \"view\""
1908 "\n\tReadonly with -R command line arg"
1910 #if ENABLE_FEATURE_VI_SET
1911 "\n\tSome colon mode commands with \':\'"
1913 #if ENABLE_FEATURE_VI_SETOPTS
1914 "\n\tSettable options with \":set\""
1916 #if ENABLE_FEATURE_VI_USE_SIGNALS
1917 "\n\tSignal catching- ^C"
1918 "\n\tJob suspend and resume with ^Z"
1920 #if ENABLE_FEATURE_VI_WIN_RESIZE
1921 "\n\tAdapt to window re-sizes"
1926 static inline void print_literal(char * buf, const char * s) // copy s to buf, convert unprintable
1939 c_is_no_print = (c & 0x80) && !Isprint(c);
1940 if (c_is_no_print) {
1944 if (c < ' ' || c == 127) {
1960 #if ENABLE_FEATURE_VI_DOT_CMD
1961 static void start_new_cmd_q(char c)
1964 free(last_modifying_cmd);
1965 // get buffer for new cmd
1966 last_modifying_cmd = xzalloc(MAX_LINELEN);
1967 // if there is a current cmd count put it in the buffer first
1969 sprintf(last_modifying_cmd, "%d%c", cmdcnt, c);
1970 else // just save char c onto queue
1971 last_modifying_cmd[0] = c;
1975 static void end_cmd_q(void)
1977 #if ENABLE_FEATURE_VI_YANKMARK
1978 YDreg = 26; // go back to default Yank/Delete reg
1982 #endif /* FEATURE_VI_DOT_CMD */
1984 #if ENABLE_FEATURE_VI_YANKMARK \
1985 || (ENABLE_FEATURE_VI_COLON && ENABLE_FEATURE_VI_SEARCH) \
1986 || ENABLE_FEATURE_VI_CRASHME
1987 static char *string_insert(char * p, char * s) // insert the string at 'p'
1992 if (text_hole_make(p, i)) {
1994 for (cnt = 0; *s != '\0'; s++) {
1998 #if ENABLE_FEATURE_VI_YANKMARK
1999 psb("Put %d lines (%d chars) from [%c]", cnt, i, what_reg());
2006 #if ENABLE_FEATURE_VI_YANKMARK
2007 static char *text_yank(char * p, char * q, int dest) // copy text into a register
2012 if (q < p) { // they are backwards- reverse them
2019 free(t); // if already a yank register, free it
2020 t = xmalloc(cnt + 1); // get a new register
2021 memset(t, '\0', cnt + 1); // clear new text[]
2022 strncpy(t, p, cnt); // copy text[] into bufer
2027 static char what_reg(void)
2031 c = 'D'; // default to D-reg
2032 if (0 <= YDreg && YDreg <= 25)
2033 c = 'a' + (char) YDreg;
2041 static void check_context(char cmd)
2043 // A context is defined to be "modifying text"
2044 // Any modifying command establishes a new context.
2046 if (dot < context_start || dot > context_end) {
2047 if (strchr(modifying_cmds, cmd) != NULL) {
2048 // we are trying to modify text[]- make this the current context
2049 mark[27] = mark[26]; // move cur to prev
2050 mark[26] = dot; // move local to cur
2051 context_start = prev_line(prev_line(dot));
2052 context_end = next_line(next_line(dot));
2053 //loiter= start_loiter= now;
2058 static inline char *swap_context(char * p) // goto new context for '' command make this the current context
2062 // the current context is in mark[26]
2063 // the previous context is in mark[27]
2064 // only swap context if other context is valid
2065 if (text <= mark[27] && mark[27] <= end - 1) {
2067 mark[27] = mark[26];
2069 p = mark[26]; // where we are going- previous context
2070 context_start = prev_line(prev_line(prev_line(p)));
2071 context_end = next_line(next_line(next_line(p)));
2075 #endif /* FEATURE_VI_YANKMARK */
2077 //----- Set terminal attributes --------------------------------
2078 static void rawmode(void)
2080 tcgetattr(0, &term_orig);
2081 term_vi = term_orig;
2082 term_vi.c_lflag &= (~ICANON & ~ECHO); // leave ISIG ON- allow intr's
2083 term_vi.c_iflag &= (~IXON & ~ICRNL);
2084 term_vi.c_oflag &= (~ONLCR);
2085 term_vi.c_cc[VMIN] = 1;
2086 term_vi.c_cc[VTIME] = 0;
2087 erase_char = term_vi.c_cc[VERASE];
2088 tcsetattr(0, TCSANOW, &term_vi);
2091 static void cookmode(void)
2094 tcsetattr(0, TCSANOW, &term_orig);
2097 //----- Come here when we get a window resize signal ---------
2098 #if ENABLE_FEATURE_VI_USE_SIGNALS
2099 static void winch_sig(int sig ATTRIBUTE_UNUSED)
2101 signal(SIGWINCH, winch_sig);
2102 if (ENABLE_FEATURE_VI_WIN_RESIZE)
2103 get_terminal_width_height(0, &columns, &rows);
2104 new_screen(rows, columns); // get memory for virtual screen
2105 redraw(TRUE); // re-draw the screen
2108 //----- Come here when we get a continue signal -------------------
2109 static void cont_sig(int sig ATTRIBUTE_UNUSED)
2111 rawmode(); // terminal to "raw"
2112 last_status_cksum = 0; // force status update
2113 redraw(TRUE); // re-draw the screen
2115 signal(SIGTSTP, suspend_sig);
2116 signal(SIGCONT, SIG_DFL);
2117 kill(my_pid, SIGCONT);
2120 //----- Come here when we get a Suspend signal -------------------
2121 static void suspend_sig(int sig ATTRIBUTE_UNUSED)
2123 place_cursor(rows - 1, 0, FALSE); // go to bottom of screen
2124 clear_to_eol(); // Erase to end of line
2125 cookmode(); // terminal to "cooked"
2127 signal(SIGCONT, cont_sig);
2128 signal(SIGTSTP, SIG_DFL);
2129 kill(my_pid, SIGTSTP);
2132 //----- Come here when we get a signal ---------------------------
2133 static void catch_sig(int sig)
2135 signal(SIGINT, catch_sig);
2137 longjmp(restart, sig);
2139 #endif /* FEATURE_VI_USE_SIGNALS */
2141 static int mysleep(int hund) // sleep for 'h' 1/100 seconds
2143 struct pollfd pfd[1];
2146 pfd[0].events = POLLIN;
2147 return safe_poll(pfd, 1, hund*10) > 0;
2150 static int readed_for_parse;
2152 //----- IO Routines --------------------------------------------
2153 static char readit(void) // read (maybe cursor) key from stdin
2162 static const struct esc_cmds esccmds[] = {
2163 {"OA", VI_K_UP}, // cursor key Up
2164 {"OB", VI_K_DOWN}, // cursor key Down
2165 {"OC", VI_K_RIGHT}, // Cursor Key Right
2166 {"OD", VI_K_LEFT}, // cursor key Left
2167 {"OH", VI_K_HOME}, // Cursor Key Home
2168 {"OF", VI_K_END}, // Cursor Key End
2169 {"[A", VI_K_UP}, // cursor key Up
2170 {"[B", VI_K_DOWN}, // cursor key Down
2171 {"[C", VI_K_RIGHT}, // Cursor Key Right
2172 {"[D", VI_K_LEFT}, // cursor key Left
2173 {"[H", VI_K_HOME}, // Cursor Key Home
2174 {"[F", VI_K_END}, // Cursor Key End
2175 {"[1~", VI_K_HOME}, // Cursor Key Home
2176 {"[2~", VI_K_INSERT}, // Cursor Key Insert
2177 {"[4~", VI_K_END}, // Cursor Key End
2178 {"[5~", VI_K_PAGEUP}, // Cursor Key Page Up
2179 {"[6~", VI_K_PAGEDOWN},// Cursor Key Page Down
2180 {"OP", VI_K_FUN1}, // Function Key F1
2181 {"OQ", VI_K_FUN2}, // Function Key F2
2182 {"OR", VI_K_FUN3}, // Function Key F3
2183 {"OS", VI_K_FUN4}, // Function Key F4
2184 // careful: these have no terminating NUL!
2185 {"[15~", VI_K_FUN5}, // Function Key F5
2186 {"[17~", VI_K_FUN6}, // Function Key F6
2187 {"[18~", VI_K_FUN7}, // Function Key F7
2188 {"[19~", VI_K_FUN8}, // Function Key F8
2189 {"[20~", VI_K_FUN9}, // Function Key F9
2190 {"[21~", VI_K_FUN10}, // Function Key F10
2191 {"[23~", VI_K_FUN11}, // Function Key F11
2192 {"[24~", VI_K_FUN12}, // Function Key F12
2193 {"[11~", VI_K_FUN1}, // Function Key F1
2194 {"[12~", VI_K_FUN2}, // Function Key F2
2195 {"[13~", VI_K_FUN3}, // Function Key F3
2196 {"[14~", VI_K_FUN4}, // Function Key F4
2198 enum { ESCCMDS_COUNT = ARRAY_SIZE(esccmds) };
2200 alarm(0); // turn alarm OFF while we wait for input
2202 n = readed_for_parse;
2203 // get input from User- are there already input chars in Q?
2205 // the Q is empty, wait for a typed char
2206 n = safe_read(0, readbuffer, MAX_LINELEN - 1);
2208 if (errno == EBADF || errno == EFAULT || errno == EINVAL
2215 if (readbuffer[0] == 27) {
2216 // This is an ESC char. Is this Esc sequence?
2217 // Could be bare Esc key. See if there are any
2218 // more chars to read after the ESC. This would
2219 // be a Function or Cursor Key sequence.
2220 struct pollfd pfd[1];
2222 pfd[0].events = POLLIN;
2223 // keep reading while there are input chars and room in buffer
2224 while (safe_poll(pfd, 1, 0) > 0 && n <= (MAX_LINELEN - 5)) {
2225 // read the rest of the ESC string
2226 int r = safe_read(0, readbuffer + n, MAX_LINELEN - n);
2231 readed_for_parse = n;
2234 if (c == 27 && n > 1) {
2235 // Maybe cursor or function key?
2236 const struct esc_cmds *eindex;
2238 for (eindex = esccmds; eindex < &esccmds[ESCCMDS_COUNT]; eindex++) {
2239 int cnt = strnlen(eindex->seq, 4);
2243 if (strncmp(eindex->seq, readbuffer + 1, cnt))
2245 // is a Cursor key- put derived value back into Q
2247 // for squeeze out the ESC sequence
2251 if (eindex == &esccmds[ESCCMDS_COUNT]) {
2252 /* defined ESC sequence not found, set only one ESC */
2258 // remove key sequence from Q
2259 readed_for_parse -= n;
2260 memmove(readbuffer, readbuffer + n, MAX_LINELEN - n);
2261 alarm(3); // we are done waiting for input, turn alarm ON
2265 //----- IO Routines --------------------------------------------
2266 static char get_one_char(void)
2270 #if ENABLE_FEATURE_VI_DOT_CMD
2271 // ! adding2q && ioq == 0 read()
2272 // ! adding2q && ioq != 0 *ioq
2273 // adding2q *last_modifying_cmd= read()
2275 // we are not adding to the q.
2276 // but, we may be reading from a q
2278 // there is no current q, read from STDIN
2279 c = readit(); // get the users input
2281 // there is a queue to get chars from first
2284 // the end of the q, read from STDIN
2286 ioq_start = ioq = 0;
2287 c = readit(); // get the users input
2291 // adding STDIN chars to q
2292 c = readit(); // get the users input
2293 if (last_modifying_cmd != 0) {
2294 int len = strlen(last_modifying_cmd);
2295 if (len >= MAX_LINELEN - 1) {
2296 psbs("last_modifying_cmd overrun");
2298 // add new char to q
2299 last_modifying_cmd[len] = c;
2304 c = readit(); // get the users input
2305 #endif /* FEATURE_VI_DOT_CMD */
2306 return c; // return the char, where ever it came from
2309 static char *get_input_line(const char * prompt) // get input line- use "status line"
2313 char buf[MAX_LINELEN];
2317 strcpy(buf, prompt);
2318 last_status_cksum = 0; // force status update
2319 place_cursor(rows - 1, 0, FALSE); // go to Status line, bottom of screen
2320 clear_to_eol(); // clear the line
2321 write1(prompt); // write out the :, /, or ? prompt
2324 while (i < MAX_LINELEN) {
2325 c = get_one_char(); // read user input
2326 if (c == '\n' || c == '\r' || c == 27)
2327 break; // is this end of input
2328 if (c == erase_char || c == 8 || c == 127) {
2329 // user wants to erase prev char
2330 i--; // backup to prev char
2331 buf[i] = '\0'; // erase the char
2332 buf[i + 1] = '\0'; // null terminate buffer
2333 write1("\b \b"); // erase char on screen
2334 if (i <= 0) { // user backs up before b-o-l, exit
2338 buf[i] = c; // save char in buffer
2339 buf[i + 1] = '\0'; // make sure buffer is null terminated
2340 bb_putchar(c); // echo the char back to user
2346 obufp = xstrdup(buf);
2350 static int file_size(const char *fn) // what is the byte size of "fn"
2356 if (fn && fn[0] && stat(fn, &st_buf) == 0) // see if file exists
2357 cnt = (int) st_buf.st_size;
2361 static int file_insert(const char * fn, char *p
2362 USE_FEATURE_VI_READONLY(, int update_ro_status))
2366 struct stat statbuf;
2369 if (stat(fn, &statbuf) < 0) {
2370 psbs("\"%s\" %s", fn, strerror(errno));
2373 if ((statbuf.st_mode & S_IFREG) == 0) {
2374 // This is not a regular file
2375 psbs("\"%s\" Not a regular file", fn);
2378 /* // this check is done by open()
2379 if ((statbuf.st_mode & (S_IRUSR | S_IRGRP | S_IROTH)) == 0) {
2380 // dont have any read permissions
2381 psbs("\"%s\" Not readable", fn);
2385 if (p < text || p > end) {
2386 psbs("Trying to insert file outside of memory");
2390 // read file to buffer
2391 fd = open(fn, O_RDONLY);
2393 psbs("\"%s\" %s", fn, strerror(errno));
2396 size = statbuf.st_size;
2397 p = text_hole_make(p, size);
2400 cnt = safe_read(fd, p, size);
2402 psbs("\"%s\" %s", fn, strerror(errno));
2403 p = text_hole_delete(p, p + size - 1); // un-do buffer insert
2404 } else if (cnt < size) {
2405 // There was a partial read, shrink unused space text[]
2406 p = text_hole_delete(p + cnt, p + (size - cnt) - 1); // un-do buffer insert
2407 psbs("cannot read all of file \"%s\"", fn);
2413 #if ENABLE_FEATURE_VI_READONLY
2414 if (update_ro_status
2415 && ((access(fn, W_OK) < 0) ||
2416 /* root will always have access()
2417 * so we check fileperms too */
2418 !(statbuf.st_mode & (S_IWUSR | S_IWGRP | S_IWOTH))
2421 SET_READONLY_FILE(readonly_mode);
2428 static int file_write(char * fn, char * first, char * last)
2430 int fd, cnt, charcnt;
2433 psbs("No current filename");
2437 // FIXIT- use the correct umask()
2438 fd = open(fn, (O_WRONLY | O_CREAT | O_TRUNC), 0664);
2441 cnt = last - first + 1;
2442 charcnt = write(fd, first, cnt);
2443 if (charcnt == cnt) {
2445 //file_modified = FALSE; // the file has not been modified
2453 //----- Terminal Drawing ---------------------------------------
2454 // The terminal is made up of 'rows' line of 'columns' columns.
2455 // classically this would be 24 x 80.
2456 // screen coordinates
2462 // 23,0 ... 23,79 status line
2465 //----- Move the cursor to row x col (count from 0, not 1) -------
2466 static void place_cursor(int row, int col, int opti)
2468 char cm1[MAX_LINELEN];
2470 #if ENABLE_FEATURE_VI_OPTIMIZE_CURSOR
2471 char cm2[MAX_LINELEN];
2473 // char cm3[MAX_LINELEN];
2474 int Rrow = last_row;
2477 memset(cm1, '\0', MAX_LINELEN); // clear the buffer
2479 if (row < 0) row = 0;
2480 if (row >= rows) row = rows - 1;
2481 if (col < 0) col = 0;
2482 if (col >= columns) col = columns - 1;
2484 //----- 1. Try the standard terminal ESC sequence
2485 sprintf(cm1, CMrc, row + 1, col + 1);
2490 #if ENABLE_FEATURE_VI_OPTIMIZE_CURSOR
2491 //----- find the minimum # of chars to move cursor -------------
2492 //----- 2. Try moving with discreet chars (Newline, [back]space, ...)
2493 memset(cm2, '\0', MAX_LINELEN); // clear the buffer
2495 // move to the correct row
2496 while (row < Rrow) {
2497 // the cursor has to move up
2501 while (row > Rrow) {
2502 // the cursor has to move down
2503 strcat(cm2, CMdown);
2507 // now move to the correct column
2508 strcat(cm2, "\r"); // start at col 0
2509 // just send out orignal source char to get to correct place
2510 screenp = &screen[row * columns]; // start of screen line
2511 strncat(cm2, screenp, col);
2513 //----- 3. Try some other way of moving cursor
2514 //---------------------------------------------
2516 // pick the shortest cursor motion to send out
2518 if (strlen(cm2) < strlen(cm)) {
2520 } /* else if (strlen(cm3) < strlen(cm)) {
2523 #endif /* FEATURE_VI_OPTIMIZE_CURSOR */
2525 write1(cm); // move the cursor
2528 //----- Erase from cursor to end of line -----------------------
2529 static void clear_to_eol(void)
2531 write1(Ceol); // Erase from cursor to end of line
2534 //----- Erase from cursor to end of screen -----------------------
2535 static void clear_to_eos(void)
2537 write1(Ceos); // Erase from cursor to end of screen
2540 //----- Start standout mode ------------------------------------
2541 static void standout_start(void) // send "start reverse video" sequence
2543 write1(SOs); // Start reverse video mode
2546 //----- End standout mode --------------------------------------
2547 static void standout_end(void) // send "end reverse video" sequence
2549 write1(SOn); // End reverse video mode
2552 //----- Flash the screen --------------------------------------
2553 static void flash(int h)
2555 standout_start(); // send "start reverse video" sequence
2558 standout_end(); // send "end reverse video" sequence
2562 static void Indicate_Error(void)
2564 #if ENABLE_FEATURE_VI_CRASHME
2566 return; // generate a random command
2569 write1(bell); // send out a bell character
2575 //----- Screen[] Routines --------------------------------------
2576 //----- Erase the Screen[] memory ------------------------------
2577 static void screen_erase(void)
2579 memset(screen, ' ', screensize); // clear new screen
2582 static int bufsum(char *buf, int count)
2585 char *e = buf + count;
2588 sum += (unsigned char) *buf++;
2592 //----- Draw the status line at bottom of the screen -------------
2593 static void show_status_line(void)
2595 int cnt = 0, cksum = 0;
2597 // either we already have an error or status message, or we
2599 if (!have_status_msg) {
2600 cnt = format_edit_status();
2601 cksum = bufsum(status_buffer, cnt);
2603 if (have_status_msg || ((cnt > 0 && last_status_cksum != cksum))) {
2604 last_status_cksum= cksum; // remember if we have seen this line
2605 place_cursor(rows - 1, 0, FALSE); // put cursor on status line
2606 write1(status_buffer);
2608 if (have_status_msg) {
2609 if (((int)strlen(status_buffer) - (have_status_msg - 1)) >
2611 have_status_msg = 0;
2614 have_status_msg = 0;
2616 place_cursor(crow, ccol, FALSE); // put cursor back in correct place
2621 //----- format the status buffer, the bottom line of screen ------
2622 // format status buffer, with STANDOUT mode
2623 static void psbs(const char *format, ...)
2627 va_start(args, format);
2628 strcpy(status_buffer, SOs); // Terminal standout mode on
2629 vsprintf(status_buffer + strlen(status_buffer), format, args);
2630 strcat(status_buffer, SOn); // Terminal standout mode off
2633 have_status_msg = 1 + sizeof(SOs) + sizeof(SOn) - 2;
2636 // format status buffer
2637 static void psb(const char *format, ...)
2641 va_start(args, format);
2642 vsprintf(status_buffer, format, args);
2645 have_status_msg = 1;
2648 static void ni(const char * s) // display messages
2650 char buf[MAX_LINELEN];
2652 print_literal(buf, s);
2653 psbs("\'%s\' is not implemented", buf);
2656 static int format_edit_status(void) // show file status on status line
2659 static const char cmd_mode_indicator[] ALIGN1 = "-IR-";
2660 int cur, percent, ret, trunc_at;
2662 // file_modified is now a counter rather than a flag. this
2663 // helps reduce the amount of line counting we need to do.
2664 // (this will cause a mis-reporting of modified status
2665 // once every MAXINT editing operations.)
2667 // it would be nice to do a similar optimization here -- if
2668 // we haven't done a motion that could have changed which line
2669 // we're on, then we shouldn't have to do this count_lines()
2670 cur = count_lines(text, dot);
2672 // reduce counting -- the total lines can't have
2673 // changed if we haven't done any edits.
2674 if (file_modified != last_file_modified) {
2675 tot = cur + count_lines(dot, end - 1) - 1;
2676 last_file_modified = file_modified;
2679 // current line percent
2680 // ------------- ~~ ----------
2683 percent = (100 * cur) / tot;
2689 trunc_at = columns < STATUS_BUFFER_LEN-1 ?
2690 columns : STATUS_BUFFER_LEN-1;
2692 ret = snprintf(status_buffer, trunc_at+1,
2693 #if ENABLE_FEATURE_VI_READONLY
2694 "%c %s%s%s %d/%d %d%%",
2696 "%c %s%s %d/%d %d%%",
2698 cmd_mode_indicator[cmd_mode & 3],
2699 (current_filename != NULL ? current_filename : "No file"),
2700 #if ENABLE_FEATURE_VI_READONLY
2701 (readonly_mode ? " [Readonly]" : ""),
2703 (file_modified ? " [Modified]" : ""),
2706 if (ret >= 0 && ret < trunc_at)
2707 return ret; /* it all fit */
2709 return trunc_at; /* had to truncate */
2712 //----- Force refresh of all Lines -----------------------------
2713 static void redraw(int full_screen)
2715 place_cursor(0, 0, FALSE); // put cursor in correct place
2716 clear_to_eos(); // tel terminal to erase display
2717 screen_erase(); // erase the internal screen buffer
2718 last_status_cksum = 0; // force status update
2719 refresh(full_screen); // this will redraw the entire display
2723 //----- Format a text[] line into a buffer ---------------------
2724 static void format_line(char *dest, char *src, int li)
2729 for (co = 0; co < MAX_SCR_COLS; co++) {
2730 c = ' '; // assume blank
2731 if (li > 0 && co == 0) {
2732 c = '~'; // not first line, assume Tilde
2734 // are there chars in text[] and have we gone past the end
2735 if (text < end && src < end) {
2740 if ((c & 0x80) && !Isprint(c)) {
2743 if ((unsigned char)(c) < ' ' || c == 0x7f) {
2747 for (; (co % tabstop) != (tabstop - 1); co++) {
2755 c += '@'; // make it visible
2758 // the co++ is done here so that the column will
2759 // not be overwritten when we blank-out the rest of line
2766 //----- Refresh the changed screen lines -----------------------
2767 // Copy the source line from text[] into the buffer and note
2768 // if the current screenline is different from the new buffer.
2769 // If they differ then that line needs redrawing on the terminal.
2771 static void refresh(int full_screen)
2773 static int old_offset;
2776 char buf[MAX_SCR_COLS];
2777 char *tp, *sp; // pointer into text[] and screen[]
2778 #if ENABLE_FEATURE_VI_OPTIMIZE_CURSOR
2779 int last_li = -2; // last line that changed- for optimizing cursor movement
2782 if (ENABLE_FEATURE_VI_WIN_RESIZE)
2783 get_terminal_width_height(0, &columns, &rows);
2784 sync_cursor(dot, &crow, &ccol); // where cursor will be (on "dot")
2785 tp = screenbegin; // index into text[] of top line
2787 // compare text[] to screen[] and mark screen[] lines that need updating
2788 for (li = 0; li < rows - 1; li++) {
2789 int cs, ce; // column start & end
2790 memset(buf, ' ', MAX_SCR_COLS); // blank-out the buffer
2791 buf[MAX_SCR_COLS-1] = 0; // NULL terminate the buffer
2792 // format current text line into buf
2793 format_line(buf, tp, li);
2795 // skip to the end of the current text[] line
2796 while (tp < end && *tp++ != '\n') /*no-op*/;
2798 // see if there are any changes between vitual screen and buf
2799 changed = FALSE; // assume no change
2802 sp = &screen[li * columns]; // start of screen line
2804 // force re-draw of every single column from 0 - columns-1
2807 // compare newly formatted buffer with virtual screen
2808 // look forward for first difference between buf and screen
2809 for (; cs <= ce; cs++) {
2810 if (buf[cs + offset] != sp[cs]) {
2811 changed = TRUE; // mark for redraw
2816 // look backward for last difference between buf and screen
2817 for ( ; ce >= cs; ce--) {
2818 if (buf[ce + offset] != sp[ce]) {
2819 changed = TRUE; // mark for redraw
2823 // now, cs is index of first diff, and ce is index of last diff
2825 // if horz offset has changed, force a redraw
2826 if (offset != old_offset) {
2831 // make a sanity check of columns indexes
2833 if (ce > columns-1) ce= columns-1;
2834 if (cs > ce) { cs= 0; ce= columns-1; }
2835 // is there a change between vitual screen and buf
2837 // copy changed part of buffer to virtual screen
2838 memmove(sp+cs, buf+(cs+offset), ce-cs+1);
2840 // move cursor to column of first change
2841 if (offset != old_offset) {
2842 // opti_cur_move is still too stupid
2843 // to handle offsets correctly
2844 place_cursor(li, cs, FALSE);
2846 #if ENABLE_FEATURE_VI_OPTIMIZE_CURSOR
2847 // if this just the next line
2848 // try to optimize cursor movement
2849 // otherwise, use standard ESC sequence
2850 place_cursor(li, cs, li == (last_li+1) ? TRUE : FALSE);
2853 place_cursor(li, cs, FALSE); // use standard ESC sequence
2854 #endif /* FEATURE_VI_OPTIMIZE_CURSOR */
2857 // write line out to terminal
2859 int nic = ce - cs + 1;
2860 char *out = sp + cs;
2867 #if ENABLE_FEATURE_VI_OPTIMIZE_CURSOR
2873 #if ENABLE_FEATURE_VI_OPTIMIZE_CURSOR
2874 place_cursor(crow, ccol, (crow == last_row) ? TRUE : FALSE);
2877 place_cursor(crow, ccol, FALSE);
2880 if (offset != old_offset)
2881 old_offset = offset;
2884 //---------------------------------------------------------------------
2885 //----- the Ascii Chart -----------------------------------------------
2887 // 00 nul 01 soh 02 stx 03 etx 04 eot 05 enq 06 ack 07 bel
2888 // 08 bs 09 ht 0a nl 0b vt 0c np 0d cr 0e so 0f si
2889 // 10 dle 11 dc1 12 dc2 13 dc3 14 dc4 15 nak 16 syn 17 etb
2890 // 18 can 19 em 1a sub 1b esc 1c fs 1d gs 1e rs 1f us
2891 // 20 sp 21 ! 22 " 23 # 24 $ 25 % 26 & 27 '
2892 // 28 ( 29 ) 2a * 2b + 2c , 2d - 2e . 2f /
2893 // 30 0 31 1 32 2 33 3 34 4 35 5 36 6 37 7
2894 // 38 8 39 9 3a : 3b ; 3c < 3d = 3e > 3f ?
2895 // 40 @ 41 A 42 B 43 C 44 D 45 E 46 F 47 G
2896 // 48 H 49 I 4a J 4b K 4c L 4d M 4e N 4f O
2897 // 50 P 51 Q 52 R 53 S 54 T 55 U 56 V 57 W
2898 // 58 X 59 Y 5a Z 5b [ 5c \ 5d ] 5e ^ 5f _
2899 // 60 ` 61 a 62 b 63 c 64 d 65 e 66 f 67 g
2900 // 68 h 69 i 6a j 6b k 6c l 6d m 6e n 6f o
2901 // 70 p 71 q 72 r 73 s 74 t 75 u 76 v 77 w
2902 // 78 x 79 y 7a z 7b { 7c | 7d } 7e ~ 7f del
2903 //---------------------------------------------------------------------
2905 //----- Execute a Vi Command -----------------------------------
2906 static void do_cmd(char c)
2909 char c1, *p, *q, buf[9], *save_dot;
2910 int cnt, i, j, dir, yf;
2912 c1 = c; // quiet the compiler
2913 cnt = yf = dir = 0; // quiet the compiler
2914 msg = p = q = save_dot = buf; // quiet the compiler
2915 memset(buf, '\0', 9); // clear buf
2919 /* if this is a cursor key, skip these checks */
2932 if (cmd_mode == 2) {
2933 // flip-flop Insert/Replace mode
2934 if (c == VI_K_INSERT)
2936 // we are 'R'eplacing the current *dot with new char
2938 // don't Replace past E-o-l
2939 cmd_mode = 1; // convert to insert
2941 if (1 <= c || Isprint(c)) {
2943 dot = yank_delete(dot, dot, 0, YANKDEL); // delete char
2944 dot = char_insert(dot, c); // insert new char
2949 if (cmd_mode == 1) {
2950 // hitting "Insert" twice means "R" replace mode
2951 if (c == VI_K_INSERT) goto dc5;
2952 // insert the char c at "dot"
2953 if (1 <= c || Isprint(c)) {
2954 dot = char_insert(dot, c);
2969 #if ENABLE_FEATURE_VI_CRASHME
2970 case 0x14: // dc4 ctrl-T
2971 crashme = (crashme == 0) ? 1 : 0;
3002 //case 'u': // u- FIXME- there is no undo
3004 default: // unrecognised command
3013 end_cmd_q(); // stop adding to q
3014 case 0x00: // nul- ignore
3016 case 2: // ctrl-B scroll up full screen
3017 case VI_K_PAGEUP: // Cursor Key Page Up
3018 dot_scroll(rows - 2, -1);
3020 #if ENABLE_FEATURE_VI_USE_SIGNALS
3021 case 0x03: // ctrl-C interrupt
3022 longjmp(restart, 1);
3024 case 26: // ctrl-Z suspend
3025 suspend_sig(SIGTSTP);
3028 case 4: // ctrl-D scroll down half screen
3029 dot_scroll((rows - 2) / 2, 1);
3031 case 5: // ctrl-E scroll down one line
3034 case 6: // ctrl-F scroll down full screen
3035 case VI_K_PAGEDOWN: // Cursor Key Page Down
3036 dot_scroll(rows - 2, 1);
3038 case 7: // ctrl-G show current status
3039 last_status_cksum = 0; // force status update
3041 case 'h': // h- move left
3042 case VI_K_LEFT: // cursor key Left
3043 case 8: // ctrl-H- move left (This may be ERASE char)
3044 case 0x7f: // DEL- move left (This may be ERASE char)
3050 case 10: // Newline ^J
3051 case 'j': // j- goto next line, same col
3052 case VI_K_DOWN: // cursor key Down
3056 dot_next(); // go to next B-o-l
3057 dot = move_to_col(dot, ccol + offset); // try stay in same col
3059 case 12: // ctrl-L force redraw whole screen
3060 case 18: // ctrl-R force redraw
3061 place_cursor(0, 0, FALSE); // put cursor in correct place
3062 clear_to_eos(); // tel terminal to erase display
3064 screen_erase(); // erase the internal screen buffer
3065 last_status_cksum = 0; // force status update
3066 refresh(TRUE); // this will redraw the entire display
3068 case 13: // Carriage Return ^M
3069 case '+': // +- goto next line
3076 case 21: // ctrl-U scroll up half screen
3077 dot_scroll((rows - 2) / 2, -1);
3079 case 25: // ctrl-Y scroll up one line
3085 cmd_mode = 0; // stop insrting
3087 last_status_cksum = 0; // force status update
3089 case ' ': // move right
3090 case 'l': // move right
3091 case VI_K_RIGHT: // Cursor Key Right
3097 #if ENABLE_FEATURE_VI_YANKMARK
3098 case '"': // "- name a register to use for Delete/Yank
3099 c1 = get_one_char();
3107 case '\'': // '- goto a specific mark
3108 c1 = get_one_char();
3113 q = mark[(unsigned char) c1];
3114 if (text <= q && q < end) {
3116 dot_begin(); // go to B-o-l
3119 } else if (c1 == '\'') { // goto previous context
3120 dot = swap_context(dot); // swap current and previous context
3121 dot_begin(); // go to B-o-l
3127 case 'm': // m- Mark a line
3128 // this is really stupid. If there are any inserts or deletes
3129 // between text[0] and dot then this mark will not point to the
3130 // correct location! It could be off by many lines!
3131 // Well..., at least its quick and dirty.
3132 c1 = get_one_char();
3136 // remember the line
3137 mark[(int) c1] = dot;
3142 case 'P': // P- Put register before
3143 case 'p': // p- put register after
3146 psbs("Nothing in register %c", what_reg());
3149 // are we putting whole lines or strings
3150 if (strchr(p, '\n') != NULL) {
3152 dot_begin(); // putting lines- Put above
3155 // are we putting after very last line?
3156 if (end_line(dot) == (end - 1)) {
3157 dot = end; // force dot to end of text[]
3159 dot_next(); // next line, then put before
3164 dot_right(); // move to right, can move to NL
3166 dot = string_insert(dot, p); // insert the string
3167 end_cmd_q(); // stop adding to q
3169 case 'U': // U- Undo; replace current line with original version
3170 if (reg[Ureg] != 0) {
3171 p = begin_line(dot);
3173 p = text_hole_delete(p, q); // delete cur line
3174 p = string_insert(p, reg[Ureg]); // insert orig line
3179 #endif /* FEATURE_VI_YANKMARK */
3180 case '$': // $- goto end of line
3181 case VI_K_END: // Cursor Key End
3185 dot = end_line(dot);
3187 case '%': // %- find matching char of pair () [] {}
3188 for (q = dot; q < end && *q != '\n'; q++) {
3189 if (strchr("()[]{}", *q) != NULL) {
3190 // we found half of a pair
3191 p = find_pair(q, *q);
3203 case 'f': // f- forward to a user specified char
3204 last_forward_char = get_one_char(); // get the search char
3206 // dont separate these two commands. 'f' depends on ';'
3208 //**** fall thru to ... ';'
3209 case ';': // ;- look at rest of line for last forward char
3213 if (last_forward_char == 0)
3216 while (q < end - 1 && *q != '\n' && *q != last_forward_char) {
3219 if (*q == last_forward_char)
3222 case '-': // -- goto prev line
3229 #if ENABLE_FEATURE_VI_DOT_CMD
3230 case '.': // .- repeat the last modifying command
3231 // Stuff the last_modifying_cmd back into stdin
3232 // and let it be re-executed.
3233 if (last_modifying_cmd != 0) {
3234 ioq = ioq_start = xstrdup(last_modifying_cmd);
3238 #if ENABLE_FEATURE_VI_SEARCH
3239 case '?': // /- search for a pattern
3240 case '/': // /- search for a pattern
3243 q = get_input_line(buf); // get input line- use "status line"
3245 goto dc3; // if no pat re-use old pat
3246 if (q[0]) { // strlen(q) > 1: new pat- save it and find
3247 // there is a new pat
3248 free(last_search_pattern);
3249 last_search_pattern = xstrdup(q);
3250 goto dc3; // now find the pattern
3252 // user changed mind and erased the "/"- do nothing
3254 case 'N': // N- backward search for last pattern
3258 dir = BACK; // assume BACKWARD search
3260 if (last_search_pattern[0] == '?') {
3264 goto dc4; // now search for pattern
3266 case 'n': // n- repeat search for last pattern
3267 // search rest of text[] starting at next char
3268 // if search fails return orignal "p" not the "p+1" address
3273 if (last_search_pattern == 0) {
3274 msg = "No previous regular expression";
3277 if (last_search_pattern[0] == '/') {
3278 dir = FORWARD; // assume FORWARD search
3281 if (last_search_pattern[0] == '?') {
3286 q = char_search(p, last_search_pattern + 1, dir, FULL);
3288 dot = q; // good search, update "dot"
3292 // no pattern found between "dot" and "end"- continue at top
3297 q = char_search(p, last_search_pattern + 1, dir, FULL);
3298 if (q != NULL) { // found something
3299 dot = q; // found new pattern- goto it
3300 msg = "search hit BOTTOM, continuing at TOP";
3302 msg = "search hit TOP, continuing at BOTTOM";
3305 msg = "Pattern not found";
3311 case '{': // {- move backward paragraph
3312 q = char_search(dot, "\n\n", BACK, FULL);
3313 if (q != NULL) { // found blank line
3314 dot = next_line(q); // move to next blank line
3317 case '}': // }- move forward paragraph
3318 q = char_search(dot, "\n\n", FORWARD, FULL);
3319 if (q != NULL) { // found blank line
3320 dot = next_line(q); // move to next blank line
3323 #endif /* FEATURE_VI_SEARCH */
3324 case '0': // 0- goto begining of line
3334 if (c == '0' && cmdcnt < 1) {
3335 dot_begin(); // this was a standalone zero
3337 cmdcnt = cmdcnt * 10 + (c - '0'); // this 0 is part of a number
3340 case ':': // :- the colon mode commands
3341 p = get_input_line(":"); // get input line- use "status line"
3342 #if ENABLE_FEATURE_VI_COLON
3343 colon(p); // execute the command
3346 p++; // move past the ':'
3350 if (strncasecmp(p, "quit", cnt) == 0
3351 || strncasecmp(p, "q!", cnt) == 0 // delete lines
3353 if (file_modified && p[1] != '!') {
3354 psbs("No write since last change (:quit! overrides)");
3358 } else if (strncasecmp(p, "write", cnt) == 0
3359 || strncasecmp(p, "wq", cnt) == 0
3360 || strncasecmp(p, "wn", cnt) == 0
3361 || strncasecmp(p, "x", cnt) == 0
3363 cnt = file_write(current_filename, text, end - 1);
3366 psbs("Write error: %s", strerror(errno));
3369 last_file_modified = -1;
3370 psb("\"%s\" %dL, %dC", current_filename, count_lines(text, end - 1), cnt);
3371 if (p[0] == 'x' || p[1] == 'q' || p[1] == 'n'
3372 || p[0] == 'X' || p[1] == 'Q' || p[1] == 'N'
3377 } else if (strncasecmp(p, "file", cnt) == 0) {
3378 last_status_cksum = 0; // force status update
3379 } else if (sscanf(p, "%d", &j) > 0) {
3380 dot = find_line(j); // go to line # j
3382 } else { // unrecognised cmd
3385 #endif /* !FEATURE_VI_COLON */
3387 case '<': // <- Left shift something
3388 case '>': // >- Right shift something
3389 cnt = count_lines(text, dot); // remember what line we are on
3390 c1 = get_one_char(); // get the type of thing to delete
3391 find_range(&p, &q, c1);
3392 yank_delete(p, q, 1, YANKONLY); // save copy before change
3395 i = count_lines(p, q); // # of lines we are shifting
3396 for ( ; i > 0; i--, p = next_line(p)) {
3398 // shift left- remove tab or 8 spaces
3400 // shrink buffer 1 char
3401 text_hole_delete(p, p);
3402 } else if (*p == ' ') {
3403 // we should be calculating columns, not just SPACE
3404 for (j = 0; *p == ' ' && j < tabstop; j++) {
3405 text_hole_delete(p, p);
3408 } else if (c == '>') {
3409 // shift right -- add tab or 8 spaces
3410 char_insert(p, '\t');
3413 dot = find_line(cnt); // what line were we on
3415 end_cmd_q(); // stop adding to q
3417 case 'A': // A- append at e-o-l
3418 dot_end(); // go to e-o-l
3419 //**** fall thru to ... 'a'
3420 case 'a': // a- append after current char
3425 case 'B': // B- back a blank-delimited Word
3426 case 'E': // E- end of a blank-delimited word
3427 case 'W': // W- forward a blank-delimited word
3434 if (c == 'W' || isspace(dot[dir])) {
3435 dot = skip_thing(dot, 1, dir, S_TO_WS);
3436 dot = skip_thing(dot, 2, dir, S_OVER_WS);
3439 dot = skip_thing(dot, 1, dir, S_BEFORE_WS);
3441 case 'C': // C- Change to e-o-l
3442 case 'D': // D- delete to e-o-l
3444 dot = dollar_line(dot); // move to before NL
3445 // copy text into a register and delete
3446 dot = yank_delete(save_dot, dot, 0, YANKDEL); // delete to e-o-l
3448 goto dc_i; // start inserting
3449 #if ENABLE_FEATURE_VI_DOT_CMD
3451 end_cmd_q(); // stop adding to q
3454 case 'G': // G- goto to a line number (default= E-O-F)
3455 dot = end - 1; // assume E-O-F
3457 dot = find_line(cmdcnt); // what line is #cmdcnt
3461 case 'H': // H- goto top line on screen
3463 if (cmdcnt > (rows - 1)) {
3464 cmdcnt = (rows - 1);
3471 case 'I': // I- insert before first non-blank
3474 //**** fall thru to ... 'i'
3475 case 'i': // i- insert before current char
3476 case VI_K_INSERT: // Cursor Key Insert
3478 cmd_mode = 1; // start insrting
3480 case 'J': // J- join current and next lines together
3484 dot_end(); // move to NL
3485 if (dot < end - 1) { // make sure not last char in text[]
3486 *dot++ = ' '; // replace NL with space
3488 while (isblank(*dot)) { // delete leading WS
3492 end_cmd_q(); // stop adding to q
3494 case 'L': // L- goto bottom line on screen
3496 if (cmdcnt > (rows - 1)) {
3497 cmdcnt = (rows - 1);
3505 case 'M': // M- goto middle line on screen
3507 for (cnt = 0; cnt < (rows-1) / 2; cnt++)
3508 dot = next_line(dot);
3510 case 'O': // O- open a empty line above
3512 p = begin_line(dot);
3513 if (p[-1] == '\n') {
3515 case 'o': // o- open a empty line below; Yes, I know it is in the middle of the "if (..."
3517 dot = char_insert(dot, '\n');
3520 dot = char_insert(dot, '\n'); // i\n ESC
3525 case 'R': // R- continuous Replace char
3529 case 'X': // X- delete char before dot
3530 case 'x': // x- delete the current char
3531 case 's': // s- substitute the current char
3538 if (dot[dir] != '\n') {
3540 dot--; // delete prev char
3541 dot = yank_delete(dot, dot, 0, YANKDEL); // delete char
3544 goto dc_i; // start insrting
3545 end_cmd_q(); // stop adding to q
3547 case 'Z': // Z- if modified, {write}; exit
3548 // ZZ means to save file (if necessary), then exit
3549 c1 = get_one_char();
3554 if (file_modified) {
3555 if (ENABLE_FEATURE_VI_READONLY && readonly_mode) {
3556 psbs("\"%s\" File is read only", current_filename);
3559 cnt = file_write(current_filename, text, end - 1);
3562 psbs("Write error: %s", strerror(errno));
3563 } else if (cnt == (end - 1 - text + 1)) {
3570 case '^': // ^- move to first non-blank on line
3574 case 'b': // b- back a word
3575 case 'e': // e- end of word
3582 if ((dot + dir) < text || (dot + dir) > end - 1)
3585 if (isspace(*dot)) {
3586 dot = skip_thing(dot, (c == 'e') ? 2 : 1, dir, S_OVER_WS);
3588 if (isalnum(*dot) || *dot == '_') {
3589 dot = skip_thing(dot, 1, dir, S_END_ALNUM);
3590 } else if (ispunct(*dot)) {
3591 dot = skip_thing(dot, 1, dir, S_END_PUNCT);
3594 case 'c': // c- change something
3595 case 'd': // d- delete something
3596 #if ENABLE_FEATURE_VI_YANKMARK
3597 case 'y': // y- yank something
3598 case 'Y': // Y- Yank a line
3600 yf = YANKDEL; // assume either "c" or "d"
3601 #if ENABLE_FEATURE_VI_YANKMARK
3602 if (c == 'y' || c == 'Y')
3607 c1 = get_one_char(); // get the type of thing to delete
3608 find_range(&p, &q, c1);
3609 if (c1 == 27) { // ESC- user changed mind and wants out
3610 c = c1 = 27; // Escape- do nothing
3611 } else if (strchr("wW", c1)) {
3613 // don't include trailing WS as part of word
3614 while (isblank(*q)) {
3615 if (q <= text || q[-1] == '\n')
3620 dot = yank_delete(p, q, 0, yf); // delete word
3621 } else if (strchr("^0bBeEft$", c1)) {
3622 // single line copy text into a register and delete
3623 dot = yank_delete(p, q, 0, yf); // delete word
3624 } else if (strchr("cdykjHL%+-{}\r\n", c1)) {
3625 // multiple line copy text into a register and delete
3626 dot = yank_delete(p, q, 1, yf); // delete lines
3628 dot = char_insert(dot, '\n');
3629 // on the last line of file don't move to prev line
3630 if (dot != (end-1)) {
3633 } else if (c == 'd') {
3638 // could not recognize object
3639 c = c1 = 27; // error-
3643 // if CHANGING, not deleting, start inserting after the delete
3645 strcpy(buf, "Change");
3646 goto dc_i; // start inserting
3649 strcpy(buf, "Delete");
3651 #if ENABLE_FEATURE_VI_YANKMARK
3652 if (c == 'y' || c == 'Y') {
3653 strcpy(buf, "Yank");
3657 for (cnt = 0; p <= q; p++) {
3661 psb("%s %d lines (%d chars) using [%c]",
3662 buf, cnt, strlen(reg[YDreg]), what_reg());
3664 end_cmd_q(); // stop adding to q
3667 case 'k': // k- goto prev line, same col
3668 case VI_K_UP: // cursor key Up
3673 dot = move_to_col(dot, ccol + offset); // try stay in same col
3675 case 'r': // r- replace the current char with user input
3676 c1 = get_one_char(); // get the replacement char
3679 file_modified++; // has the file been modified
3681 end_cmd_q(); // stop adding to q
3683 case 't': // t- move to char prior to next x
3684 last_forward_char = get_one_char();
3686 if (*dot == last_forward_char)
3688 last_forward_char= 0;
3690 case 'w': // w- forward a word
3694 if (isalnum(*dot) || *dot == '_') { // we are on ALNUM
3695 dot = skip_thing(dot, 1, FORWARD, S_END_ALNUM);
3696 } else if (ispunct(*dot)) { // we are on PUNCT
3697 dot = skip_thing(dot, 1, FORWARD, S_END_PUNCT);
3700 dot++; // move over word
3701 if (isspace(*dot)) {
3702 dot = skip_thing(dot, 2, FORWARD, S_OVER_WS);
3706 c1 = get_one_char(); // get the replacement char
3709 cnt = (rows - 2) / 2; // put dot at center
3711 cnt = rows - 2; // put dot at bottom
3712 screenbegin = begin_line(dot); // start dot at top
3713 dot_scroll(cnt, -1);
3715 case '|': // |- move to column "cmdcnt"
3716 dot = move_to_col(dot, cmdcnt - 1); // try to move to column
3718 case '~': // ~- flip the case of letters a-z -> A-Z
3722 if (islower(*dot)) {
3723 *dot = toupper(*dot);
3724 file_modified++; // has the file been modified
3725 } else if (isupper(*dot)) {
3726 *dot = tolower(*dot);
3727 file_modified++; // has the file been modified
3730 end_cmd_q(); // stop adding to q
3732 //----- The Cursor and Function Keys -----------------------------
3733 case VI_K_HOME: // Cursor Key Home
3736 // The Fn keys could point to do_macro which could translate them
3737 case VI_K_FUN1: // Function Key F1
3738 case VI_K_FUN2: // Function Key F2
3739 case VI_K_FUN3: // Function Key F3
3740 case VI_K_FUN4: // Function Key F4
3741 case VI_K_FUN5: // Function Key F5
3742 case VI_K_FUN6: // Function Key F6
3743 case VI_K_FUN7: // Function Key F7
3744 case VI_K_FUN8: // Function Key F8
3745 case VI_K_FUN9: // Function Key F9
3746 case VI_K_FUN10: // Function Key F10
3747 case VI_K_FUN11: // Function Key F11
3748 case VI_K_FUN12: // Function Key F12
3753 // if text[] just became empty, add back an empty line
3755 char_insert(text, '\n'); // start empty buf with dummy line
3758 // it is OK for dot to exactly equal to end, otherwise check dot validity
3760 dot = bound_dot(dot); // make sure "dot" is valid
3762 #if ENABLE_FEATURE_VI_YANKMARK
3763 check_context(c); // update the current context
3767 cmdcnt = 0; // cmd was not a number, reset cmdcnt
3768 cnt = dot - begin_line(dot);
3769 // Try to stay off of the Newline
3770 if (*dot == '\n' && cnt > 0 && cmd_mode == 0)
3774 #if ENABLE_FEATURE_VI_CRASHME
3775 static int totalcmds = 0;
3776 static int Mp = 85; // Movement command Probability
3777 static int Np = 90; // Non-movement command Probability
3778 static int Dp = 96; // Delete command Probability
3779 static int Ip = 97; // Insert command Probability
3780 static int Yp = 98; // Yank command Probability
3781 static int Pp = 99; // Put command Probability
3782 static int M = 0, N = 0, I = 0, D = 0, Y = 0, P = 0, U = 0;
3783 const char chars[20] = "\t012345 abcdABCD-=.$";
3784 const char *const words[20] = {
3785 "this", "is", "a", "test",
3786 "broadcast", "the", "emergency", "of",
3787 "system", "quick", "brown", "fox",
3788 "jumped", "over", "lazy", "dogs",
3789 "back", "January", "Febuary", "March"
3791 const char *const lines[20] = {
3792 "You should have received a copy of the GNU General Public License\n",
3793 "char c, cm, *cmd, *cmd1;\n",
3794 "generate a command by percentages\n",
3795 "Numbers may be typed as a prefix to some commands.\n",
3796 "Quit, discarding changes!\n",
3797 "Forced write, if permission originally not valid.\n",
3798 "In general, any ex or ed command (such as substitute or delete).\n",
3799 "I have tickets available for the Blazers vs LA Clippers for Monday, Janurary 1 at 1:00pm.\n",
3800 "Please get w/ me and I will go over it with you.\n",
3801 "The following is a list of scheduled, committed changes.\n",
3802 "1. Launch Norton Antivirus (Start, Programs, Norton Antivirus)\n",
3803 "Reminder....Town Meeting in Central Perk cafe today at 3:00pm.\n",
3804 "Any question about transactions please contact Sterling Huxley.\n",
3805 "I will try to get back to you by Friday, December 31.\n",
3806 "This Change will be implemented on Friday.\n",
3807 "Let me know if you have problems accessing this;\n",
3808 "Sterling Huxley recently added you to the access list.\n",
3809 "Would you like to go to lunch?\n",
3810 "The last command will be automatically run.\n",
3811 "This is too much english for a computer geek.\n",
3813 char *multilines[20] = {
3814 "You should have received a copy of the GNU General Public License\n",
3815 "char c, cm, *cmd, *cmd1;\n",
3816 "generate a command by percentages\n",
3817 "Numbers may be typed as a prefix to some commands.\n",
3818 "Quit, discarding changes!\n",
3819 "Forced write, if permission originally not valid.\n",
3820 "In general, any ex or ed command (such as substitute or delete).\n",
3821 "I have tickets available for the Blazers vs LA Clippers for Monday, Janurary 1 at 1:00pm.\n",
3822 "Please get w/ me and I will go over it with you.\n",
3823 "The following is a list of scheduled, committed changes.\n",
3824 "1. Launch Norton Antivirus (Start, Programs, Norton Antivirus)\n",
3825 "Reminder....Town Meeting in Central Perk cafe today at 3:00pm.\n",
3826 "Any question about transactions please contact Sterling Huxley.\n",
3827 "I will try to get back to you by Friday, December 31.\n",
3828 "This Change will be implemented on Friday.\n",
3829 "Let me know if you have problems accessing this;\n",
3830 "Sterling Huxley recently added you to the access list.\n",
3831 "Would you like to go to lunch?\n",
3832 "The last command will be automatically run.\n",
3833 "This is too much english for a computer geek.\n",
3836 // create a random command to execute
3837 static void crash_dummy()
3839 static int sleeptime; // how long to pause between commands
3840 char c, cm, *cmd, *cmd1;
3841 int i, cnt, thing, rbi, startrbi, percent;
3843 // "dot" movement commands
3844 cmd1 = " \n\r\002\004\005\006\025\0310^$-+wWeEbBhjklHL";
3846 // is there already a command running?
3847 if (readed_for_parse > 0)
3851 sleeptime = 0; // how long to pause between commands
3852 memset(readbuffer, '\0', MAX_LINELEN); // clear the read buffer
3853 // generate a command by percentages
3854 percent = (int) lrand48() % 100; // get a number from 0-99
3855 if (percent < Mp) { // Movement commands
3856 // available commands
3859 } else if (percent < Np) { // non-movement commands
3860 cmd = "mz<>\'\""; // available commands
3862 } else if (percent < Dp) { // Delete commands
3863 cmd = "dx"; // available commands
3865 } else if (percent < Ip) { // Inset commands
3866 cmd = "iIaAsrJ"; // available commands
3868 } else if (percent < Yp) { // Yank commands
3869 cmd = "yY"; // available commands
3871 } else if (percent < Pp) { // Put commands
3872 cmd = "pP"; // available commands
3875 // We do not know how to handle this command, try again
3879 // randomly pick one of the available cmds from "cmd[]"
3880 i = (int) lrand48() % strlen(cmd);
3882 if (strchr(":\024", cm))
3883 goto cd0; // dont allow colon or ctrl-T commands
3884 readbuffer[rbi++] = cm; // put cmd into input buffer
3886 // now we have the command-
3887 // there are 1, 2, and multi char commands
3888 // find out which and generate the rest of command as necessary
3889 if (strchr("dmryz<>\'\"", cm)) { // 2-char commands
3890 cmd1 = " \n\r0$^-+wWeEbBhjklHL";
3891 if (cm == 'm' || cm == '\'' || cm == '\"') { // pick a reg[]
3892 cmd1 = "abcdefghijklmnopqrstuvwxyz";
3894 thing = (int) lrand48() % strlen(cmd1); // pick a movement command
3896 readbuffer[rbi++] = c; // add movement to input buffer
3898 if (strchr("iIaAsc", cm)) { // multi-char commands
3900 // change some thing
3901 thing = (int) lrand48() % strlen(cmd1); // pick a movement command
3903 readbuffer[rbi++] = c; // add movement to input buffer
3905 thing = (int) lrand48() % 4; // what thing to insert
3906 cnt = (int) lrand48() % 10; // how many to insert
3907 for (i = 0; i < cnt; i++) {
3908 if (thing == 0) { // insert chars
3909 readbuffer[rbi++] = chars[((int) lrand48() % strlen(chars))];
3910 } else if (thing == 1) { // insert words
3911 strcat(readbuffer, words[(int) lrand48() % 20]);
3912 strcat(readbuffer, " ");
3913 sleeptime = 0; // how fast to type
3914 } else if (thing == 2) { // insert lines
3915 strcat(readbuffer, lines[(int) lrand48() % 20]);
3916 sleeptime = 0; // how fast to type
3917 } else { // insert multi-lines
3918 strcat(readbuffer, multilines[(int) lrand48() % 20]);
3919 sleeptime = 0; // how fast to type
3922 strcat(readbuffer, "\033");
3924 readed_for_parse = strlen(readbuffer);
3928 mysleep(sleeptime); // sleep 1/100 sec
3931 // test to see if there are any errors
3932 static void crash_test()
3934 static time_t oldtim;
3937 char d[2], msg[MAX_LINELEN];
3941 strcat(msg, "end<text ");
3943 if (end > textend) {
3944 strcat(msg, "end>textend ");
3947 strcat(msg, "dot<text ");
3950 strcat(msg, "dot>end ");
3952 if (screenbegin < text) {
3953 strcat(msg, "screenbegin<text ");
3955 if (screenbegin > end - 1) {
3956 strcat(msg, "screenbegin>end-1 ");
3961 printf("\n\n%d: \'%c\' %s\n\n\n%s[Hit return to continue]%s",
3962 totalcmds, last_input_char, msg, SOs, SOn);
3964 while (safe_read(0, d, 1) > 0) {
3965 if (d[0] == '\n' || d[0] == '\r')
3970 tim = (time_t) time((time_t *) 0);
3971 if (tim >= (oldtim + 3)) {
3972 sprintf(status_buffer,
3973 "Tot=%d: M=%d N=%d I=%d D=%d Y=%d P=%d U=%d size=%d",
3974 totalcmds, M, N, I, D, Y, P, U, end - text + 1);