1 /* vi: set sw=4 ts=4: */
3 * tiny vi.c: A small 'vi' clone
4 * Copyright (C) 2000, 2001 Sterling Huxley <sterling@europa.com>
6 * Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
12 * $HOME/.exrc and ./.exrc
13 * add magic to search /foo.*bar
16 * if mark[] values were line numbers rather than pointers
17 * it would be easier to change the mark when add/delete lines
18 * More intelligence in refresh()
19 * ":r !cmd" and "!cmd" to filter text through an external command
20 * A true "undo" facility
21 * An "ex" line oriented mode- maybe using "cmdedit"
26 /* the CRASHME code is unmaintained, and doesn't currently build */
27 #define ENABLE_FEATURE_VI_CRASHME 0
30 #if ENABLE_LOCALE_SUPPORT
32 #if ENABLE_FEATURE_VI_8BIT
33 #define Isprint(c) isprint(c)
35 #define Isprint(c) (isprint(c) && (unsigned char)(c) < 0x7f)
40 /* 0x9b is Meta-ESC */
41 #if ENABLE_FEATURE_VI_8BIT
42 #define Isprint(c) ((unsigned char)(c) >= ' ' && (c) != 0x7f && (unsigned char)(c) != 0x9b)
44 #define Isprint(c) ((unsigned char)(c) >= ' ' && (unsigned char)(c) < 0x7f)
51 MAX_TABSTOP = 32, // sanity limit
52 // User input len. Need not be extra big.
53 // Lines in file being edited *can* be bigger than this.
55 // Sanity limits. We have only one buffer of this size.
56 MAX_SCR_COLS = CONFIG_FEATURE_VI_MAX_LEN,
57 MAX_SCR_ROWS = CONFIG_FEATURE_VI_MAX_LEN,
60 /* vt102 typical ESC sequence */
61 /* terminal standout start/normal ESC sequence */
62 static const char SOs[] ALIGN1 = "\033[7m";
63 static const char SOn[] ALIGN1 = "\033[0m";
64 /* terminal bell sequence */
65 static const char bell[] ALIGN1 = "\007";
66 /* Clear-end-of-line and Clear-end-of-screen ESC sequence */
67 static const char Ceol[] ALIGN1 = "\033[0K";
68 static const char Ceos[] ALIGN1 = "\033[0J";
69 /* Cursor motion arbitrary destination ESC sequence */
70 static const char CMrc[] ALIGN1 = "\033[%d;%dH";
71 /* Cursor motion up and down ESC sequence */
72 static const char CMup[] ALIGN1 = "\033[A";
73 static const char CMdown[] ALIGN1 = "\n";
75 #if ENABLE_FEATURE_VI_DOT_CMD || ENABLE_FEATURE_VI_YANKMARK
76 // cmds modifying text[]
77 // vda: removed "aAiIs" as they switch us into insert mode
78 // and remembering input for replay after them makes no sense
79 static const char modifying_cmds[] = "cCdDJoOpPrRxX<>~";
85 FORWARD = 1, // code depends on "1" for array index
86 BACK = -1, // code depends on "-1" for array index
87 LIMITED = 0, // how much of text[] in char_search
88 FULL = 1, // how much of text[] in char_search
90 S_BEFORE_WS = 1, // used in skip_thing() for moving "dot"
91 S_TO_WS = 2, // used in skip_thing() for moving "dot"
92 S_OVER_WS = 3, // used in skip_thing() for moving "dot"
93 S_END_PUNCT = 4, // used in skip_thing() for moving "dot"
94 S_END_ALNUM = 5, // used in skip_thing() for moving "dot"
98 /* vi.c expects chars to be unsigned. */
99 /* busybox build system provides that, but it's better */
100 /* to audit and fix the source */
103 /* many references - keep near the top of globals */
104 char *text, *end; // pointers to the user data in memory
105 char *dot; // where all the action takes place
106 int text_size; // size of the allocated buffer
110 #define VI_AUTOINDENT 1
111 #define VI_SHOWMATCH 2
112 #define VI_IGNORECASE 4
113 #define VI_ERR_METHOD 8
114 #define autoindent (vi_setops & VI_AUTOINDENT)
115 #define showmatch (vi_setops & VI_SHOWMATCH )
116 #define ignorecase (vi_setops & VI_IGNORECASE)
117 /* indicate error with beep or flash */
118 #define err_method (vi_setops & VI_ERR_METHOD)
120 #if ENABLE_FEATURE_VI_READONLY
121 smallint readonly_mode;
122 #define SET_READONLY_FILE(flags) ((flags) |= 0x01)
123 #define SET_READONLY_MODE(flags) ((flags) |= 0x02)
124 #define UNSET_READONLY_FILE(flags) ((flags) &= 0xfe)
126 #define SET_READONLY_FILE(flags) ((void)0)
127 #define SET_READONLY_MODE(flags) ((void)0)
128 #define UNSET_READONLY_FILE(flags) ((void)0)
131 smallint editing; // >0 while we are editing a file
132 // [code audit says "can be 0, 1 or 2 only"]
133 smallint cmd_mode; // 0=command 1=insert 2=replace
134 int file_modified; // buffer contents changed (counter, not flag!)
135 int last_file_modified; // = -1;
136 int fn_start; // index of first cmd line file name
137 int save_argc; // how many file names on cmd line
138 int cmdcnt; // repetition count
139 unsigned rows, columns; // the terminal screen is this size
140 int crow, ccol; // cursor is on Crow x Ccol
141 int offset; // chars scrolled off the screen to the left
142 int have_status_msg; // is default edit status needed?
143 // [don't make smallint!]
144 int last_status_cksum; // hash of current status line
145 char *current_filename;
146 char *screenbegin; // index into text[], of top line on the screen
147 char *screen; // pointer to the virtual screen buffer
148 int screensize; // and its size
150 int last_forward_char; // last char searched for with 'f' (int because of Unicode)
151 char erase_char; // the users erase character
152 char last_input_char; // last char read from user
154 #if ENABLE_FEATURE_VI_DOT_CMD
155 smallint adding2q; // are we currently adding user input to q
156 int lmc_len; // length of last_modifying_cmd
157 char *ioq, *ioq_start; // pointer to string for get_one_char to "read"
159 #if ENABLE_FEATURE_VI_OPTIMIZE_CURSOR
160 int last_row; // where the cursor was last moved to
162 #if ENABLE_FEATURE_VI_USE_SIGNALS || ENABLE_FEATURE_VI_CRASHME
165 #if ENABLE_FEATURE_VI_SEARCH
166 char *last_search_pattern; // last pattern from a '/' or '?' search
170 #if ENABLE_FEATURE_VI_YANKMARK
171 char *edit_file__cur_line;
173 int refresh__old_offset;
174 int format_edit_status__tot;
176 /* a few references only */
177 #if ENABLE_FEATURE_VI_YANKMARK
178 int YDreg, Ureg; // default delete register and orig line for "U"
179 char *reg[28]; // named register a-z, "D", and "U" 0-25,26,27
180 char *mark[28]; // user marks points somewhere in text[]- a-z and previous context ''
181 char *context_start, *context_end;
183 #if ENABLE_FEATURE_VI_USE_SIGNALS
184 sigjmp_buf restart; // catch_sig()
186 struct termios term_orig, term_vi; // remember what the cooked mode was
187 #if ENABLE_FEATURE_VI_COLON
188 char *initial_cmds[3]; // currently 2 entries, NULL terminated
190 // Should be just enough to hold a key sequence,
191 // but CRASHME mode uses it as generated command buffer too
192 #if ENABLE_FEATURE_VI_CRASHME
193 char readbuffer[128];
195 char readbuffer[KEYCODE_BUFFER_SIZE];
197 #define STATUS_BUFFER_LEN 200
198 char status_buffer[STATUS_BUFFER_LEN]; // messages to the user
199 #if ENABLE_FEATURE_VI_DOT_CMD
200 char last_modifying_cmd[MAX_INPUT_LEN]; // last modifying cmd for "."
202 char get_input_line__buf[MAX_INPUT_LEN]; /* former static */
204 char scr_out_buf[MAX_SCR_COLS + MAX_TABSTOP * 2];
206 #define G (*ptr_to_globals)
207 #define text (G.text )
208 #define text_size (G.text_size )
213 #define vi_setops (G.vi_setops )
214 #define editing (G.editing )
215 #define cmd_mode (G.cmd_mode )
216 #define file_modified (G.file_modified )
217 #define last_file_modified (G.last_file_modified )
218 #define fn_start (G.fn_start )
219 #define save_argc (G.save_argc )
220 #define cmdcnt (G.cmdcnt )
221 #define rows (G.rows )
222 #define columns (G.columns )
223 #define crow (G.crow )
224 #define ccol (G.ccol )
225 #define offset (G.offset )
226 #define status_buffer (G.status_buffer )
227 #define have_status_msg (G.have_status_msg )
228 #define last_status_cksum (G.last_status_cksum )
229 #define current_filename (G.current_filename )
230 #define screen (G.screen )
231 #define screensize (G.screensize )
232 #define screenbegin (G.screenbegin )
233 #define tabstop (G.tabstop )
234 #define last_forward_char (G.last_forward_char )
235 #define erase_char (G.erase_char )
236 #define last_input_char (G.last_input_char )
237 #if ENABLE_FEATURE_VI_READONLY
238 #define readonly_mode (G.readonly_mode )
240 #define readonly_mode 0
242 #define adding2q (G.adding2q )
243 #define lmc_len (G.lmc_len )
245 #define ioq_start (G.ioq_start )
246 #define last_row (G.last_row )
247 #define my_pid (G.my_pid )
248 #define last_search_pattern (G.last_search_pattern)
250 #define edit_file__cur_line (G.edit_file__cur_line)
251 #define refresh__old_offset (G.refresh__old_offset)
252 #define format_edit_status__tot (G.format_edit_status__tot)
254 #define YDreg (G.YDreg )
255 #define Ureg (G.Ureg )
256 #define mark (G.mark )
257 #define context_start (G.context_start )
258 #define context_end (G.context_end )
259 #define restart (G.restart )
260 #define term_orig (G.term_orig )
261 #define term_vi (G.term_vi )
262 #define initial_cmds (G.initial_cmds )
263 #define readbuffer (G.readbuffer )
264 #define scr_out_buf (G.scr_out_buf )
265 #define last_modifying_cmd (G.last_modifying_cmd )
266 #define get_input_line__buf (G.get_input_line__buf)
268 #define INIT_G() do { \
269 SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \
270 last_file_modified = -1; \
271 /* "" but has space for 2 chars: */ \
272 IF_FEATURE_VI_SEARCH(last_search_pattern = xzalloc(2);) \
276 static int init_text_buffer(char *); // init from file or create new
277 static void edit_file(char *); // edit one file
278 static void do_cmd(int); // execute a command
279 static int next_tabstop(int);
280 static void sync_cursor(char *, int *, int *); // synchronize the screen cursor to dot
281 static char *begin_line(char *); // return pointer to cur line B-o-l
282 static char *end_line(char *); // return pointer to cur line E-o-l
283 static char *prev_line(char *); // return pointer to prev line B-o-l
284 static char *next_line(char *); // return pointer to next line B-o-l
285 static char *end_screen(void); // get pointer to last char on screen
286 static int count_lines(char *, char *); // count line from start to stop
287 static char *find_line(int); // find begining of line #li
288 static char *move_to_col(char *, int); // move "p" to column l
289 static void dot_left(void); // move dot left- dont leave line
290 static void dot_right(void); // move dot right- dont leave line
291 static void dot_begin(void); // move dot to B-o-l
292 static void dot_end(void); // move dot to E-o-l
293 static void dot_next(void); // move dot to next line B-o-l
294 static void dot_prev(void); // move dot to prev line B-o-l
295 static void dot_scroll(int, int); // move the screen up or down
296 static void dot_skip_over_ws(void); // move dot pat WS
297 static void dot_delete(void); // delete the char at 'dot'
298 static char *bound_dot(char *); // make sure text[0] <= P < "end"
299 static char *new_screen(int, int); // malloc virtual screen memory
300 static char *char_insert(char *, char); // insert the char c at 'p'
301 // might reallocate text[]! use p += stupid_insert(p, ...),
302 // and be careful to not use pointers into potentially freed text[]!
303 static uintptr_t stupid_insert(char *, char); // stupidly insert the char c at 'p'
304 static int find_range(char **, char **, char); // return pointers for an object
305 static int st_test(char *, int, int, char *); // helper for skip_thing()
306 static char *skip_thing(char *, int, int, int); // skip some object
307 static char *find_pair(char *, char); // find matching pair () [] {}
308 static char *text_hole_delete(char *, char *); // at "p", delete a 'size' byte hole
309 // might reallocate text[]! use p += text_hole_make(p, ...),
310 // and be careful to not use pointers into potentially freed text[]!
311 static uintptr_t text_hole_make(char *, int); // at "p", make a 'size' byte hole
312 static char *yank_delete(char *, char *, int, int); // yank text[] into register then delete
313 static void show_help(void); // display some help info
314 static void rawmode(void); // set "raw" mode on tty
315 static void cookmode(void); // return to "cooked" mode on tty
316 // sleep for 'h' 1/100 seconds, return 1/0 if stdin is (ready for read)/(not ready)
317 static int mysleep(int);
318 static int readit(void); // read (maybe cursor) key from stdin
319 static int get_one_char(void); // read 1 char from stdin
320 static int file_size(const char *); // what is the byte size of "fn"
321 #if !ENABLE_FEATURE_VI_READONLY
322 #define file_insert(fn, p, update_ro_status) file_insert(fn, p)
324 // file_insert might reallocate text[]!
325 static int file_insert(const char *, char *, int);
326 static int file_write(char *, char *, char *);
327 #if !ENABLE_FEATURE_VI_OPTIMIZE_CURSOR
328 #define place_cursor(a, b, optimize) place_cursor(a, b)
330 static void place_cursor(int, int, int);
331 static void screen_erase(void);
332 static void clear_to_eol(void);
333 static void clear_to_eos(void);
334 static void go_bottom_and_clear_to_eol(void);
335 static void standout_start(void); // send "start reverse video" sequence
336 static void standout_end(void); // send "end reverse video" sequence
337 static void flash(int); // flash the terminal screen
338 static void show_status_line(void); // put a message on the bottom line
339 static void status_line(const char *, ...); // print to status buf
340 static void status_line_bold(const char *, ...);
341 static void not_implemented(const char *); // display "Not implemented" message
342 static int format_edit_status(void); // format file status on status line
343 static void redraw(int); // force a full screen refresh
344 static char* format_line(char* /*, int*/);
345 static void refresh(int); // update the terminal from screen[]
347 static void Indicate_Error(void); // use flash or beep to indicate error
348 #define indicate_error(c) Indicate_Error()
349 static void Hit_Return(void);
351 #if ENABLE_FEATURE_VI_SEARCH
352 static char *char_search(char *, const char *, int, int); // search for pattern starting at p
353 static int mycmp(const char *, const char *, int); // string cmp based in "ignorecase"
355 #if ENABLE_FEATURE_VI_COLON
356 static char *get_one_address(char *, int *); // get colon addr, if present
357 static char *get_address(char *, int *, int *); // get two colon addrs, if present
358 static void colon(char *); // execute the "colon" mode cmds
360 #if ENABLE_FEATURE_VI_USE_SIGNALS
361 static void winch_sig(int); // catch window size changes
362 static void suspend_sig(int); // catch ctrl-Z
363 static void catch_sig(int); // catch ctrl-C and alarm time-outs
365 #if ENABLE_FEATURE_VI_DOT_CMD
366 static void start_new_cmd_q(char); // new queue for command
367 static void end_cmd_q(void); // stop saving input chars
369 #define end_cmd_q() ((void)0)
371 #if ENABLE_FEATURE_VI_SETOPTS
372 static void showmatching(char *); // show the matching pair () [] {}
374 #if ENABLE_FEATURE_VI_YANKMARK || (ENABLE_FEATURE_VI_COLON && ENABLE_FEATURE_VI_SEARCH) || ENABLE_FEATURE_VI_CRASHME
375 // might reallocate text[]! use p += string_insert(p, ...),
376 // and be careful to not use pointers into potentially freed text[]!
377 static uintptr_t string_insert(char *, const char *); // insert the string at 'p'
379 #if ENABLE_FEATURE_VI_YANKMARK
380 static char *text_yank(char *, char *, int); // save copy of "p" into a register
381 static char what_reg(void); // what is letter of current YDreg
382 static void check_context(char); // remember context for '' command
384 #if ENABLE_FEATURE_VI_CRASHME
385 static void crash_dummy();
386 static void crash_test();
387 static int crashme = 0;
391 static void write1(const char *out)
396 int vi_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
397 int vi_main(int argc, char **argv)
403 #if ENABLE_FEATURE_VI_USE_SIGNALS || ENABLE_FEATURE_VI_CRASHME
406 #if ENABLE_FEATURE_VI_CRASHME
407 srand((long) my_pid);
409 #ifdef NO_SUCH_APPLET_YET
410 /* If we aren't "vi", we are "view" */
411 if (ENABLE_FEATURE_VI_READONLY && applet_name[2]) {
412 SET_READONLY_MODE(readonly_mode);
416 vi_setops = VI_AUTOINDENT | VI_SHOWMATCH | VI_IGNORECASE;
417 // 1- process $HOME/.exrc file (not inplemented yet)
418 // 2- process EXINIT variable from environment
419 // 3- process command line args
420 #if ENABLE_FEATURE_VI_COLON
422 char *p = getenv("EXINIT");
424 initial_cmds[0] = xstrndup(p, MAX_INPUT_LEN);
427 while ((c = getopt(argc, argv, "hCRH" IF_FEATURE_VI_COLON("c:"))) != -1) {
429 #if ENABLE_FEATURE_VI_CRASHME
434 #if ENABLE_FEATURE_VI_READONLY
435 case 'R': // Read-only flag
436 SET_READONLY_MODE(readonly_mode);
439 #if ENABLE_FEATURE_VI_COLON
440 case 'c': // cmd line vi command
442 initial_cmds[initial_cmds[0] != 0] = xstrndup(optarg, MAX_INPUT_LEN);
454 // The argv array can be used by the ":next" and ":rewind" commands
456 fn_start = optind; // remember first file name for :next and :rew
459 //----- This is the main file handling loop --------------
460 if (optind >= argc) {
463 for (; optind < argc; optind++) {
464 edit_file(argv[optind]);
467 //-----------------------------------------------------------
472 /* read text from file or create an empty buf */
473 /* will also update current_filename */
474 static int init_text_buffer(char *fn)
477 int size = file_size(fn); // file size. -1 means does not exist.
479 /* allocate/reallocate text buffer */
481 text_size = size + 10240;
482 screenbegin = dot = end = text = xzalloc(text_size);
484 if (fn != current_filename) {
485 free(current_filename);
486 current_filename = xstrdup(fn);
489 // file dont exist. Start empty buf with dummy line
490 char_insert(text, '\n');
493 rc = file_insert(fn, text, 1);
496 last_file_modified = -1;
497 #if ENABLE_FEATURE_VI_YANKMARK
498 /* init the marks. */
499 memset(mark, 0, sizeof(mark));
504 static void edit_file(char *fn)
506 #if ENABLE_FEATURE_VI_YANKMARK
507 #define cur_line edit_file__cur_line
511 #if ENABLE_FEATURE_VI_USE_SIGNALS
515 editing = 1; // 0 = exit, 1 = one file, 2 = multiple files
520 if (ENABLE_FEATURE_VI_WIN_RESIZE) {
521 get_terminal_width_height(0, &columns, &rows);
522 if (rows > MAX_SCR_ROWS) rows = MAX_SCR_ROWS;
523 if (columns > MAX_SCR_COLS) columns = MAX_SCR_COLS;
525 new_screen(rows, columns); // get memory for virtual screen
526 init_text_buffer(fn);
528 #if ENABLE_FEATURE_VI_YANKMARK
529 YDreg = 26; // default Yank/Delete reg
530 Ureg = 27; // hold orig line for "U" cmd
531 mark[26] = mark[27] = text; // init "previous context"
534 last_forward_char = last_input_char = '\0';
538 #if ENABLE_FEATURE_VI_USE_SIGNALS
540 signal(SIGWINCH, winch_sig);
541 signal(SIGTSTP, suspend_sig);
542 sig = sigsetjmp(restart, 1);
544 screenbegin = dot = text;
548 cmd_mode = 0; // 0=command 1=insert 2='R'eplace
551 offset = 0; // no horizontal offset
553 #if ENABLE_FEATURE_VI_DOT_CMD
555 ioq = ioq_start = NULL;
560 #if ENABLE_FEATURE_VI_COLON
565 while ((p = initial_cmds[n])) {
575 free(initial_cmds[n]);
576 initial_cmds[n] = NULL;
581 redraw(FALSE); // dont force every col re-draw
582 //------This is the main Vi cmd handling loop -----------------------
583 while (editing > 0) {
584 #if ENABLE_FEATURE_VI_CRASHME
586 if ((end - text) > 1) {
587 crash_dummy(); // generate a random command
590 string_insert(text, "\n\n##### Ran out of text to work on. #####\n\n"); // insert the string
596 last_input_char = c = get_one_char(); // get a cmd from user
597 #if ENABLE_FEATURE_VI_YANKMARK
598 // save a copy of the current line- for the 'U" command
599 if (begin_line(dot) != cur_line) {
600 cur_line = begin_line(dot);
601 text_yank(begin_line(dot), end_line(dot), Ureg);
604 #if ENABLE_FEATURE_VI_DOT_CMD
605 // These are commands that change text[].
606 // Remember the input for the "." command
607 if (!adding2q && ioq_start == NULL
608 && cmd_mode == 0 // command mode
609 && c > '\0' // exclude NUL and non-ASCII chars
610 && c < 0x7f // (Unicode and such)
611 && strchr(modifying_cmds, c)
616 do_cmd(c); // execute the user command
618 // poll to see if there is input already waiting. if we are
619 // not able to display output fast enough to keep up, skip
620 // the display update until we catch up with input.
621 if (!readbuffer[0] && mysleep(0) == 0) {
622 // no input pending - so update output
626 #if ENABLE_FEATURE_VI_CRASHME
628 crash_test(); // test editor variables
631 //-------------------------------------------------------------------
633 go_bottom_and_clear_to_eol();
638 //----- The Colon commands -------------------------------------
639 #if ENABLE_FEATURE_VI_COLON
640 static char *get_one_address(char *p, int *addr) // get colon addr, if present
644 IF_FEATURE_VI_YANKMARK(char c;)
645 IF_FEATURE_VI_SEARCH(char *pat;)
647 *addr = -1; // assume no addr
648 if (*p == '.') { // the current line
651 *addr = count_lines(text, q);
653 #if ENABLE_FEATURE_VI_YANKMARK
654 else if (*p == '\'') { // is this a mark addr
658 if (c >= 'a' && c <= 'z') {
661 q = mark[(unsigned char) c];
662 if (q != NULL) { // is mark valid
663 *addr = count_lines(text, q);
668 #if ENABLE_FEATURE_VI_SEARCH
669 else if (*p == '/') { // a search pattern
670 q = strchrnul(++p, '/');
671 pat = xstrndup(p, q - p); // save copy of pattern
675 q = char_search(dot, pat, FORWARD, FULL);
677 *addr = count_lines(text, q);
682 else if (*p == '$') { // the last line in file
684 q = begin_line(end - 1);
685 *addr = count_lines(text, q);
686 } else if (isdigit(*p)) { // specific line number
687 sscanf(p, "%d%n", addr, &st);
690 // unrecognised address - assume -1
696 static char *get_address(char *p, int *b, int *e) // get two colon addrs, if present
698 //----- get the address' i.e., 1,3 'a,'b -----
699 // get FIRST addr, if present
701 p++; // skip over leading spaces
702 if (*p == '%') { // alias for 1,$
705 *e = count_lines(text, end-1);
708 p = get_one_address(p, b);
711 if (*p == ',') { // is there a address separator
715 // get SECOND addr, if present
716 p = get_one_address(p, e);
720 p++; // skip over trailing spaces
724 #if ENABLE_FEATURE_VI_SET && ENABLE_FEATURE_VI_SETOPTS
725 static void setops(const char *args, const char *opname, int flg_no,
726 const char *short_opname, int opt)
728 const char *a = args + flg_no;
729 int l = strlen(opname) - 1; /* opname have + ' ' */
731 if (strncasecmp(a, opname, l) == 0
732 || strncasecmp(a, short_opname, 2) == 0
742 // buf must be no longer than MAX_INPUT_LEN!
743 static void colon(char *buf)
745 char c, *orig_buf, *buf1, *q, *r;
746 char *fn, cmd[MAX_INPUT_LEN], args[MAX_INPUT_LEN];
747 int i, l, li, ch, b, e;
748 int useforce, forced = FALSE;
750 // :3154 // if (-e line 3154) goto it else stay put
751 // :4,33w! foo // write a portion of buffer to file "foo"
752 // :w // write all of buffer to current file
754 // :q! // quit- dont care about modified file
755 // :'a,'z!sort -u // filter block through sort
756 // :'f // goto mark "f"
757 // :'fl // list literal the mark "f" line
758 // :.r bar // read file "bar" into buffer before dot
759 // :/123/,/abc/d // delete lines from "123" line to "abc" line
760 // :/xyz/ // goto the "xyz" line
761 // :s/find/replace/ // substitute pattern "find" with "replace"
762 // :!<cmd> // run <cmd> then return
768 buf++; // move past the ':'
772 q = text; // assume 1,$ for the range
774 li = count_lines(text, end - 1);
775 fn = current_filename;
777 // look for optional address(es) :. :1 :1,9 :'q,'a :%
778 buf = get_address(buf, &b, &e);
780 // remember orig command line
783 // get the COMMAND into cmd[]
785 while (*buf != '\0') {
792 while (isblank(*buf))
796 buf1 = last_char_is(cmd, '!');
799 *buf1 = '\0'; // get rid of !
802 // if there is only one addr, then the addr
803 // is the line number of the single line the
804 // user wants. So, reset the end
805 // pointer to point at end of the "b" line
806 q = find_line(b); // what line is #b
811 // we were given two addrs. change the
812 // end pointer to the addr given by user.
813 r = find_line(e); // what line is #e
817 // ------------ now look for the command ------------
819 if (i == 0) { // :123CR goto line #123
821 dot = find_line(b); // what line is #b
825 #if ENABLE_FEATURE_ALLOW_EXEC
826 else if (strncmp(cmd, "!", 1) == 0) { // run a cmd
828 // :!ls run the <cmd>
829 go_bottom_and_clear_to_eol();
831 retcode = system(orig_buf + 1); // run the cmd
833 printf("\nshell returned %i\n\n", retcode);
835 Hit_Return(); // let user see results
838 else if (strncmp(cmd, "=", i) == 0) { // where is the address
839 if (b < 0) { // no addr given- use defaults
840 b = e = count_lines(text, dot);
842 status_line("%d", b);
843 } else if (strncasecmp(cmd, "delete", i) == 0) { // delete lines
844 if (b < 0) { // no addr given- use defaults
845 q = begin_line(dot); // assume .,. for the range
848 dot = yank_delete(q, r, 1, YANKDEL); // save, then delete lines
850 } else if (strncasecmp(cmd, "edit", i) == 0) { // Edit a file
851 // don't edit, if the current file has been modified
852 if (file_modified && !useforce) {
853 status_line_bold("No write since last change (:edit! overrides)");
857 // the user supplied a file name
859 } else if (current_filename && current_filename[0]) {
860 // no user supplied name- use the current filename
861 // fn = current_filename; was set by default
863 // no user file name, no current name- punt
864 status_line_bold("No current filename");
868 if (init_text_buffer(fn) < 0)
871 #if ENABLE_FEATURE_VI_YANKMARK
872 if (Ureg >= 0 && Ureg < 28 && reg[Ureg] != 0) {
873 free(reg[Ureg]); // free orig line reg- for 'U'
876 if (YDreg >= 0 && YDreg < 28 && reg[YDreg] != 0) {
877 free(reg[YDreg]); // free default yank/delete register
881 // how many lines in text[]?
882 li = count_lines(text, end - 1);
883 status_line("\"%s\"%s"
884 IF_FEATURE_VI_READONLY("%s")
885 " %dL, %dC", current_filename,
886 (file_size(fn) < 0 ? " [New file]" : ""),
887 IF_FEATURE_VI_READONLY(
888 ((readonly_mode) ? " [Readonly]" : ""),
891 } else if (strncasecmp(cmd, "file", i) == 0) { // what File is this
892 if (b != -1 || e != -1) {
893 not_implemented("No address allowed on this command");
897 // user wants a new filename
898 free(current_filename);
899 current_filename = xstrdup(args);
901 // user wants file status info
902 last_status_cksum = 0; // force status update
904 } else if (strncasecmp(cmd, "features", i) == 0) { // what features are available
905 // print out values of all features
906 go_bottom_and_clear_to_eol();
911 } else if (strncasecmp(cmd, "list", i) == 0) { // literal print line
912 if (b < 0) { // no addr given- use defaults
913 q = begin_line(dot); // assume .,. for the range
916 go_bottom_and_clear_to_eol();
918 for (; q <= r; q++) {
922 c_is_no_print = (c & 0x80) && !Isprint(c);
929 } else if (c < ' ' || c == 127) {
940 #if ENABLE_FEATURE_VI_SET
944 } else if (strncasecmp(cmd, "quit", i) == 0 // Quit
945 || strncasecmp(cmd, "next", i) == 0 // edit next file
948 // force end of argv list
955 // don't exit if the file been modified
957 status_line_bold("No write since last change (:%s! overrides)",
958 (*cmd == 'q' ? "quit" : "next"));
961 // are there other file to edit
962 if (*cmd == 'q' && optind < save_argc - 1) {
963 status_line_bold("%d more file to edit", (save_argc - optind - 1));
966 if (*cmd == 'n' && optind >= save_argc - 1) {
967 status_line_bold("No more files to edit");
971 } else if (strncasecmp(cmd, "read", i) == 0) { // read file into text[]
974 status_line_bold("No filename given");
977 if (b < 0) { // no addr given- use defaults
978 q = begin_line(dot); // assume "dot"
980 // read after current line- unless user said ":0r foo"
983 { // dance around potentially-reallocated text[]
984 uintptr_t ofs = q - text;
985 ch = file_insert(fn, q, 0);
989 goto vc1; // nothing was inserted
990 // how many lines in text[]?
991 li = count_lines(q, q + ch - 1);
993 IF_FEATURE_VI_READONLY("%s")
995 IF_FEATURE_VI_READONLY((readonly_mode ? " [Readonly]" : ""),)
998 // if the insert is before "dot" then we need to update
1001 /*file_modified++; - done by file_insert */
1003 } else if (strncasecmp(cmd, "rewind", i) == 0) { // rewind cmd line args
1004 if (file_modified && !useforce) {
1005 status_line_bold("No write since last change (:rewind! overrides)");
1007 // reset the filenames to edit
1008 optind = fn_start - 1;
1011 #if ENABLE_FEATURE_VI_SET
1012 } else if (strncasecmp(cmd, "set", i) == 0) { // set or clear features
1013 #if ENABLE_FEATURE_VI_SETOPTS
1016 i = 0; // offset into args
1017 // only blank is regarded as args delmiter. What about tab '\t' ?
1018 if (!args[0] || strcasecmp(args, "all") == 0) {
1019 // print out values of all options
1020 go_bottom_and_clear_to_eol();
1021 printf("----------------------------------------\r\n");
1022 #if ENABLE_FEATURE_VI_SETOPTS
1025 printf("autoindent ");
1031 printf("ignorecase ");
1034 printf("showmatch ");
1035 printf("tabstop=%d ", tabstop);
1040 #if ENABLE_FEATURE_VI_SETOPTS
1043 if (strncasecmp(argp, "no", 2) == 0)
1044 i = 2; // ":set noautoindent"
1045 setops(argp, "autoindent ", i, "ai", VI_AUTOINDENT);
1046 setops(argp, "flash ", i, "fl", VI_ERR_METHOD);
1047 setops(argp, "ignorecase ", i, "ic", VI_IGNORECASE);
1048 setops(argp, "showmatch ", i, "ic", VI_SHOWMATCH);
1050 if (strncasecmp(argp + i, "tabstop=%d ", 7) == 0) {
1051 sscanf(strchr(argp + i, '='), "tabstop=%d" + 7, &ch);
1052 if (ch > 0 && ch <= MAX_TABSTOP)
1055 while (*argp && *argp != ' ')
1056 argp++; // skip to arg delimiter (i.e. blank)
1057 while (*argp && *argp == ' ')
1058 argp++; // skip all delimiting blanks
1060 #endif /* FEATURE_VI_SETOPTS */
1061 #endif /* FEATURE_VI_SET */
1062 #if ENABLE_FEATURE_VI_SEARCH
1063 } else if (strncasecmp(cmd, "s", 1) == 0) { // substitute a pattern with a replacement pattern
1067 // F points to the "find" pattern
1068 // R points to the "replace" pattern
1069 // replace the cmd line delimiters "/" with NULLs
1070 gflag = 0; // global replace flag
1071 c = orig_buf[1]; // what is the delimiter
1072 F = orig_buf + 2; // start of "find"
1073 R = strchr(F, c); // middle delimiter
1076 *R++ = '\0'; // terminate "find"
1077 buf1 = strchr(R, c);
1080 *buf1++ = '\0'; // terminate "replace"
1081 if (*buf1 == 'g') { // :s/foo/bar/g
1083 gflag++; // turn on gflag
1086 if (b < 0) { // maybe :s/foo/bar/
1087 q = begin_line(dot); // start with cur line
1088 b = count_lines(text, q); // cur line number
1091 e = b; // maybe :.s/foo/bar/
1092 for (i = b; i <= e; i++) { // so, :20,23 s \0 find \0 replace \0
1093 ls = q; // orig line start
1095 buf1 = char_search(q, F, FORWARD, LIMITED); // search cur line only for "find"
1098 // we found the "find" pattern - delete it
1099 text_hole_delete(buf1, buf1 + strlen(F) - 1);
1100 // inset the "replace" patern
1101 bias = string_insert(buf1, R); // insert the string
1104 /*q += bias; - recalculated anyway */
1105 // check for "global" :s/foo/bar/g
1107 if ((buf1 + strlen(R)) < end_line(ls)) {
1108 q = buf1 + strlen(R);
1109 goto vc4; // don't let q move past cur line
1115 #endif /* FEATURE_VI_SEARCH */
1116 } else if (strncasecmp(cmd, "version", i) == 0) { // show software version
1117 status_line(BB_VER " " BB_BT);
1118 } else if (strncasecmp(cmd, "write", i) == 0 // write text to file
1119 || strncasecmp(cmd, "wq", i) == 0
1120 || strncasecmp(cmd, "wn", i) == 0
1121 || strncasecmp(cmd, "x", i) == 0
1123 // is there a file name to write to?
1127 #if ENABLE_FEATURE_VI_READONLY
1128 if (readonly_mode && !useforce) {
1129 status_line_bold("\"%s\" File is read only", fn);
1133 // how many lines in text[]?
1134 li = count_lines(q, r);
1136 // see if file exists- if not, its just a new file request
1138 // if "fn" is not write-able, chmod u+w
1139 // sprintf(syscmd, "chmod u+w %s", fn);
1143 l = file_write(fn, q, r);
1144 if (useforce && forced) {
1146 // sprintf(syscmd, "chmod u-w %s", fn);
1152 status_line_bold("\"%s\" %s", fn, strerror(errno));
1154 status_line("\"%s\" %dL, %dC", fn, li, l);
1155 if (q == text && r == end - 1 && l == ch) {
1157 last_file_modified = -1;
1159 if ((cmd[0] == 'x' || cmd[1] == 'q' || cmd[1] == 'n' ||
1160 cmd[0] == 'X' || cmd[1] == 'Q' || cmd[1] == 'N')
1165 #if ENABLE_FEATURE_VI_READONLY
1168 #if ENABLE_FEATURE_VI_YANKMARK
1169 } else if (strncasecmp(cmd, "yank", i) == 0) { // yank lines
1170 if (b < 0) { // no addr given- use defaults
1171 q = begin_line(dot); // assume .,. for the range
1174 text_yank(q, r, YDreg);
1175 li = count_lines(q, r);
1176 status_line("Yank %d lines (%d chars) into [%c]",
1177 li, strlen(reg[YDreg]), what_reg());
1181 not_implemented(cmd);
1184 dot = bound_dot(dot); // make sure "dot" is valid
1186 #if ENABLE_FEATURE_VI_SEARCH
1188 status_line(":s expression missing delimiters");
1192 #endif /* FEATURE_VI_COLON */
1194 static void Hit_Return(void)
1199 write1("[Hit return to continue]");
1201 while ((c = get_one_char()) != '\n' && c != '\r')
1203 redraw(TRUE); // force redraw all
1206 static int next_tabstop(int col)
1208 return col + ((tabstop - 1) - (col % tabstop));
1211 //----- Synchronize the cursor to Dot --------------------------
1212 static void sync_cursor(char *d, int *row, int *col)
1214 char *beg_cur; // begin and end of "d" line
1218 beg_cur = begin_line(d); // first char of cur line
1220 if (beg_cur < screenbegin) {
1221 // "d" is before top line on screen
1222 // how many lines do we have to move
1223 cnt = count_lines(beg_cur, screenbegin);
1225 screenbegin = beg_cur;
1226 if (cnt > (rows - 1) / 2) {
1227 // we moved too many lines. put "dot" in middle of screen
1228 for (cnt = 0; cnt < (rows - 1) / 2; cnt++) {
1229 screenbegin = prev_line(screenbegin);
1233 char *end_scr; // begin and end of screen
1234 end_scr = end_screen(); // last char of screen
1235 if (beg_cur > end_scr) {
1236 // "d" is after bottom line on screen
1237 // how many lines do we have to move
1238 cnt = count_lines(end_scr, beg_cur);
1239 if (cnt > (rows - 1) / 2)
1240 goto sc1; // too many lines
1241 for (ro = 0; ro < cnt - 1; ro++) {
1242 // move screen begin the same amount
1243 screenbegin = next_line(screenbegin);
1244 // now, move the end of screen
1245 end_scr = next_line(end_scr);
1246 end_scr = end_line(end_scr);
1250 // "d" is on screen- find out which row
1252 for (ro = 0; ro < rows - 1; ro++) { // drive "ro" to correct row
1258 // find out what col "d" is on
1260 while (tp < d) { // drive "co" to correct column
1261 if (*tp == '\n') //vda || *tp == '\0')
1264 // handle tabs like real vi
1265 if (d == tp && cmd_mode) {
1268 co = next_tabstop(co);
1269 } else if ((unsigned char)*tp < ' ' || *tp == 0x7f) {
1270 co++; // display as ^X, use 2 columns
1276 // "co" is the column where "dot" is.
1277 // The screen has "columns" columns.
1278 // The currently displayed columns are 0+offset -- columns+ofset
1279 // |-------------------------------------------------------------|
1281 // offset | |------- columns ----------------|
1283 // If "co" is already in this range then we do not have to adjust offset
1284 // but, we do have to subtract the "offset" bias from "co".
1285 // If "co" is outside this range then we have to change "offset".
1286 // If the first char of a line is a tab the cursor will try to stay
1287 // in column 7, but we have to set offset to 0.
1289 if (co < 0 + offset) {
1292 if (co >= columns + offset) {
1293 offset = co - columns + 1;
1295 // if the first char of the line is a tab, and "dot" is sitting on it
1296 // force offset to 0.
1297 if (d == beg_cur && *d == '\t') {
1306 //----- Text Movement Routines ---------------------------------
1307 static char *begin_line(char *p) // return pointer to first char cur line
1310 p = memrchr(text, '\n', p - text);
1318 static char *end_line(char *p) // return pointer to NL of cur line
1321 p = memchr(p, '\n', end - p - 1);
1328 static char *dollar_line(char *p) // return pointer to just before NL line
1331 // Try to stay off of the Newline
1332 if (*p == '\n' && (p - begin_line(p)) > 0)
1337 static char *prev_line(char *p) // return pointer first char prev line
1339 p = begin_line(p); // goto begining of cur line
1340 if (p > text && p[-1] == '\n')
1341 p--; // step to prev line
1342 p = begin_line(p); // goto begining of prev line
1346 static char *next_line(char *p) // return pointer first char next line
1349 if (p < end - 1 && *p == '\n')
1350 p++; // step to next line
1354 //----- Text Information Routines ------------------------------
1355 static char *end_screen(void)
1360 // find new bottom line
1362 for (cnt = 0; cnt < rows - 2; cnt++)
1368 // count line from start to stop
1369 static int count_lines(char *start, char *stop)
1374 if (stop < start) { // start and stop are backwards- reverse them
1380 stop = end_line(stop);
1381 while (start <= stop && start <= end - 1) {
1382 start = end_line(start);
1390 static char *find_line(int li) // find begining of line #li
1394 for (q = text; li > 1; li--) {
1400 //----- Dot Movement Routines ----------------------------------
1401 static void dot_left(void)
1403 if (dot > text && dot[-1] != '\n')
1407 static void dot_right(void)
1409 if (dot < end - 1 && *dot != '\n')
1413 static void dot_begin(void)
1415 dot = begin_line(dot); // return pointer to first char cur line
1418 static void dot_end(void)
1420 dot = end_line(dot); // return pointer to last char cur line
1423 static char *move_to_col(char *p, int l)
1429 while (co < l && p < end) {
1430 if (*p == '\n') //vda || *p == '\0')
1433 co = next_tabstop(co);
1434 } else if (*p < ' ' || *p == 127) {
1435 co++; // display as ^X, use 2 columns
1443 static void dot_next(void)
1445 dot = next_line(dot);
1448 static void dot_prev(void)
1450 dot = prev_line(dot);
1453 static void dot_scroll(int cnt, int dir)
1457 for (; cnt > 0; cnt--) {
1460 // ctrl-Y scroll up one line
1461 screenbegin = prev_line(screenbegin);
1464 // ctrl-E scroll down one line
1465 screenbegin = next_line(screenbegin);
1468 // make sure "dot" stays on the screen so we dont scroll off
1469 if (dot < screenbegin)
1471 q = end_screen(); // find new bottom line
1473 dot = begin_line(q); // is dot is below bottom line?
1477 static void dot_skip_over_ws(void)
1480 while (isspace(*dot) && *dot != '\n' && dot < end - 1)
1484 static void dot_delete(void) // delete the char at 'dot'
1486 text_hole_delete(dot, dot);
1489 static char *bound_dot(char *p) // make sure text[0] <= P < "end"
1491 if (p >= end && end > text) {
1493 indicate_error('1');
1497 indicate_error('2');
1502 //----- Helper Utility Routines --------------------------------
1504 //----------------------------------------------------------------
1505 //----- Char Routines --------------------------------------------
1506 /* Chars that are part of a word-
1507 * 0123456789_ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz
1508 * Chars that are Not part of a word (stoppers)
1509 * !"#$%&'()*+,-./:;<=>?@[\]^`{|}~
1510 * Chars that are WhiteSpace
1511 * TAB NEWLINE VT FF RETURN SPACE
1512 * DO NOT COUNT NEWLINE AS WHITESPACE
1515 static char *new_screen(int ro, int co)
1520 screensize = ro * co + 8;
1521 screen = xmalloc(screensize);
1522 // initialize the new screen. assume this will be a empty file.
1524 // non-existent text[] lines start with a tilde (~).
1525 for (li = 1; li < ro - 1; li++) {
1526 screen[(li * co) + 0] = '~';
1531 #if ENABLE_FEATURE_VI_SEARCH
1532 static int mycmp(const char *s1, const char *s2, int len)
1536 i = strncmp(s1, s2, len);
1537 if (ENABLE_FEATURE_VI_SETOPTS && ignorecase) {
1538 i = strncasecmp(s1, s2, len);
1543 // search for pattern starting at p
1544 static char *char_search(char *p, const char *pat, int dir, int range)
1546 #ifndef REGEX_SEARCH
1551 if (dir == FORWARD) {
1552 stop = end - 1; // assume range is p - end-1
1553 if (range == LIMITED)
1554 stop = next_line(p); // range is to next line
1555 for (start = p; start < stop; start++) {
1556 if (mycmp(start, pat, len) == 0) {
1560 } else if (dir == BACK) {
1561 stop = text; // assume range is text - p
1562 if (range == LIMITED)
1563 stop = prev_line(p); // range is to prev line
1564 for (start = p - len; start >= stop; start--) {
1565 if (mycmp(start, pat, len) == 0) {
1570 // pattern not found
1572 #else /* REGEX_SEARCH */
1574 struct re_pattern_buffer preg;
1578 re_syntax_options = RE_SYNTAX_POSIX_EXTENDED;
1584 // assume a LIMITED forward search
1592 // count the number of chars to search over, forward or backward
1596 // RANGE could be negative if we are searching backwards
1599 q = re_compile_pattern(pat, strlen(pat), &preg);
1601 // The pattern was not compiled
1602 status_line_bold("bad search pattern: \"%s\": %s", pat, q);
1603 i = 0; // return p if pattern not compiled
1613 // search for the compiled pattern, preg, in p[]
1614 // range < 0- search backward
1615 // range > 0- search forward
1617 // re_search() < 0 not found or error
1618 // re_search() > 0 index of found pattern
1619 // struct pattern char int int int struct reg
1620 // re_search (*pattern_buffer, *string, size, start, range, *regs)
1621 i = re_search(&preg, q, size, 0, range, 0);
1624 i = 0; // return NULL if pattern not found
1627 if (dir == FORWARD) {
1633 #endif /* REGEX_SEARCH */
1635 #endif /* FEATURE_VI_SEARCH */
1637 static char *char_insert(char *p, char c) // insert the char c at 'p'
1639 if (c == 22) { // Is this an ctrl-V?
1640 p += stupid_insert(p, '^'); // use ^ to indicate literal next
1641 refresh(FALSE); // show the ^
1646 } else if (c == 27) { // Is this an ESC?
1649 end_cmd_q(); // stop adding to q
1650 last_status_cksum = 0; // force status update
1651 if ((p[-1] != '\n') && (dot > text)) {
1654 } else if (c == erase_char || c == 8 || c == 127) { // Is this a BS
1656 if ((p[-1] != '\n') && (dot>text)) {
1658 p = text_hole_delete(p, p); // shrink buffer 1 char
1661 // insert a char into text[]
1662 char *sp; // "save p"
1665 c = '\n'; // translate \r to \n
1666 sp = p; // remember addr of insert
1667 p += 1 + stupid_insert(p, c); // insert the char
1668 #if ENABLE_FEATURE_VI_SETOPTS
1669 if (showmatch && strchr(")]}", *sp) != NULL) {
1672 if (autoindent && c == '\n') { // auto indent the new line
1675 q = prev_line(p); // use prev line as template
1676 len = strspn(q, " \t"); // space or tab
1679 bias = text_hole_make(p, len);
1691 // might reallocate text[]! use p += stupid_insert(p, ...),
1692 // and be careful to not use pointers into potentially freed text[]!
1693 static uintptr_t stupid_insert(char *p, char c) // stupidly insert the char c at 'p'
1696 bias = text_hole_make(p, 1);
1699 //file_modified++; - done by text_hole_make()
1703 static int find_range(char **start, char **stop, char c)
1705 char *save_dot, *p, *q, *t;
1706 int cnt, multiline = 0;
1711 if (strchr("cdy><", c)) {
1712 // these cmds operate on whole lines
1713 p = q = begin_line(p);
1714 for (cnt = 1; cnt < cmdcnt; cnt++) {
1718 } else if (strchr("^%$0bBeEfth\b\177", c)) {
1719 // These cmds operate on char positions
1720 do_cmd(c); // execute movement cmd
1722 } else if (strchr("wW", c)) {
1723 do_cmd(c); // execute movement cmd
1724 // if we are at the next word's first char
1725 // step back one char
1726 // but check the possibilities when it is true
1727 if (dot > text && ((isspace(dot[-1]) && !isspace(dot[0]))
1728 || (ispunct(dot[-1]) && !ispunct(dot[0]))
1729 || (isalnum(dot[-1]) && !isalnum(dot[0]))))
1730 dot--; // move back off of next word
1731 if (dot > text && *dot == '\n')
1732 dot--; // stay off NL
1734 } else if (strchr("H-k{", c)) {
1735 // these operate on multi-lines backwards
1736 q = end_line(dot); // find NL
1737 do_cmd(c); // execute movement cmd
1740 } else if (strchr("L+j}\r\n", c)) {
1741 // these operate on multi-lines forwards
1742 p = begin_line(dot);
1743 do_cmd(c); // execute movement cmd
1744 dot_end(); // find NL
1747 // nothing -- this causes any other values of c to
1748 // represent the one-character range under the
1749 // cursor. this is correct for ' ' and 'l', but
1750 // perhaps no others.
1759 // backward char movements don't include start position
1760 if (q > p && strchr("^0bBh\b\177", c)) q--;
1763 for (t = p; t <= q; t++) {
1776 static int st_test(char *p, int type, int dir, char *tested)
1786 if (type == S_BEFORE_WS) {
1788 test = ((!isspace(c)) || c == '\n');
1790 if (type == S_TO_WS) {
1792 test = ((!isspace(c)) || c == '\n');
1794 if (type == S_OVER_WS) {
1796 test = ((isspace(c)));
1798 if (type == S_END_PUNCT) {
1800 test = ((ispunct(c)));
1802 if (type == S_END_ALNUM) {
1804 test = ((isalnum(c)) || c == '_');
1810 static char *skip_thing(char *p, int linecnt, int dir, int type)
1814 while (st_test(p, type, dir, &c)) {
1815 // make sure we limit search to correct number of lines
1816 if (c == '\n' && --linecnt < 1)
1818 if (dir >= 0 && p >= end - 1)
1820 if (dir < 0 && p <= text)
1822 p += dir; // move to next char
1827 // find matching char of pair () [] {}
1828 static char *find_pair(char *p, const char c)
1835 dir = 1; // assume forward
1837 case '(': match = ')'; break;
1838 case '[': match = ']'; break;
1839 case '{': match = '}'; break;
1840 case ')': match = '('; dir = -1; break;
1841 case ']': match = '['; dir = -1; break;
1842 case '}': match = '{'; dir = -1; break;
1844 for (q = p + dir; text <= q && q < end; q += dir) {
1845 // look for match, count levels of pairs (( ))
1847 level++; // increase pair levels
1849 level--; // reduce pair level
1851 break; // found matching pair
1854 q = NULL; // indicate no match
1858 #if ENABLE_FEATURE_VI_SETOPTS
1859 // show the matching char of a pair, () [] {}
1860 static void showmatching(char *p)
1864 // we found half of a pair
1865 q = find_pair(p, *p); // get loc of matching char
1867 indicate_error('3'); // no matching char
1869 // "q" now points to matching pair
1870 save_dot = dot; // remember where we are
1871 dot = q; // go to new loc
1872 refresh(FALSE); // let the user see it
1873 mysleep(40); // give user some time
1874 dot = save_dot; // go back to old loc
1878 #endif /* FEATURE_VI_SETOPTS */
1880 // open a hole in text[]
1881 // might reallocate text[]! use p += text_hole_make(p, ...),
1882 // and be careful to not use pointers into potentially freed text[]!
1883 static uintptr_t text_hole_make(char *p, int size) // at "p", make a 'size' byte hole
1889 end += size; // adjust the new END
1890 if (end >= (text + text_size)) {
1892 text_size += end - (text + text_size) + 10240;
1893 new_text = xrealloc(text, text_size);
1894 bias = (new_text - text);
1895 screenbegin += bias;
1901 memmove(p + size, p, end - size - p);
1902 memset(p, ' ', size); // clear new hole
1907 // close a hole in text[]
1908 static char *text_hole_delete(char *p, char *q) // delete "p" through "q", inclusive
1913 // move forwards, from beginning
1917 if (q < p) { // they are backward- swap them
1921 hole_size = q - p + 1;
1923 if (src < text || src > end)
1925 if (dest < text || dest >= end)
1928 goto thd_atend; // just delete the end of the buffer
1929 memmove(dest, src, cnt);
1931 end = end - hole_size; // adjust the new END
1933 dest = end - 1; // make sure dest in below end-1
1935 dest = end = text; // keep pointers valid
1941 // copy text into register, then delete text.
1942 // if dist <= 0, do not include, or go past, a NewLine
1944 static char *yank_delete(char *start, char *stop, int dist, int yf)
1948 // make sure start <= stop
1950 // they are backwards, reverse them
1956 // we cannot cross NL boundaries
1960 // dont go past a NewLine
1961 for (; p + 1 <= stop; p++) {
1963 stop = p; // "stop" just before NewLine
1969 #if ENABLE_FEATURE_VI_YANKMARK
1970 text_yank(start, stop, YDreg);
1972 if (yf == YANKDEL) {
1973 p = text_hole_delete(start, stop);
1978 static void show_help(void)
1980 puts("These features are available:"
1981 #if ENABLE_FEATURE_VI_SEARCH
1982 "\n\tPattern searches with / and ?"
1984 #if ENABLE_FEATURE_VI_DOT_CMD
1985 "\n\tLast command repeat with \'.\'"
1987 #if ENABLE_FEATURE_VI_YANKMARK
1988 "\n\tLine marking with 'x"
1989 "\n\tNamed buffers with \"x"
1991 #if ENABLE_FEATURE_VI_READONLY
1992 "\n\tReadonly if vi is called as \"view\""
1993 "\n\tReadonly with -R command line arg"
1995 #if ENABLE_FEATURE_VI_SET
1996 "\n\tSome colon mode commands with \':\'"
1998 #if ENABLE_FEATURE_VI_SETOPTS
1999 "\n\tSettable options with \":set\""
2001 #if ENABLE_FEATURE_VI_USE_SIGNALS
2002 "\n\tSignal catching- ^C"
2003 "\n\tJob suspend and resume with ^Z"
2005 #if ENABLE_FEATURE_VI_WIN_RESIZE
2006 "\n\tAdapt to window re-sizes"
2011 #if ENABLE_FEATURE_VI_DOT_CMD
2012 static void start_new_cmd_q(char c)
2014 // get buffer for new cmd
2015 // if there is a current cmd count put it in the buffer first
2017 lmc_len = sprintf(last_modifying_cmd, "%d%c", cmdcnt, c);
2018 } else { // just save char c onto queue
2019 last_modifying_cmd[0] = c;
2025 static void end_cmd_q(void)
2027 #if ENABLE_FEATURE_VI_YANKMARK
2028 YDreg = 26; // go back to default Yank/Delete reg
2032 #endif /* FEATURE_VI_DOT_CMD */
2034 #if ENABLE_FEATURE_VI_YANKMARK \
2035 || (ENABLE_FEATURE_VI_COLON && ENABLE_FEATURE_VI_SEARCH) \
2036 || ENABLE_FEATURE_VI_CRASHME
2037 // might reallocate text[]! use p += string_insert(p, ...),
2038 // and be careful to not use pointers into potentially freed text[]!
2039 static uintptr_t string_insert(char *p, const char *s) // insert the string at 'p'
2045 bias = text_hole_make(p, i);
2048 #if ENABLE_FEATURE_VI_YANKMARK
2051 for (cnt = 0; *s != '\0'; s++) {
2055 status_line("Put %d lines (%d chars) from [%c]", cnt, i, what_reg());
2062 #if ENABLE_FEATURE_VI_YANKMARK
2063 static char *text_yank(char *p, char *q, int dest) // copy text into a register
2066 if (cnt < 0) { // they are backwards- reverse them
2070 free(reg[dest]); // if already a yank register, free it
2071 reg[dest] = xstrndup(p, cnt + 1);
2075 static char what_reg(void)
2079 c = 'D'; // default to D-reg
2080 if (0 <= YDreg && YDreg <= 25)
2081 c = 'a' + (char) YDreg;
2089 static void check_context(char cmd)
2091 // A context is defined to be "modifying text"
2092 // Any modifying command establishes a new context.
2094 if (dot < context_start || dot > context_end) {
2095 if (strchr(modifying_cmds, cmd) != NULL) {
2096 // we are trying to modify text[]- make this the current context
2097 mark[27] = mark[26]; // move cur to prev
2098 mark[26] = dot; // move local to cur
2099 context_start = prev_line(prev_line(dot));
2100 context_end = next_line(next_line(dot));
2101 //loiter= start_loiter= now;
2106 static char *swap_context(char *p) // goto new context for '' command make this the current context
2110 // the current context is in mark[26]
2111 // the previous context is in mark[27]
2112 // only swap context if other context is valid
2113 if (text <= mark[27] && mark[27] <= end - 1) {
2115 mark[27] = mark[26];
2117 p = mark[26]; // where we are going- previous context
2118 context_start = prev_line(prev_line(prev_line(p)));
2119 context_end = next_line(next_line(next_line(p)));
2123 #endif /* FEATURE_VI_YANKMARK */
2125 //----- Set terminal attributes --------------------------------
2126 static void rawmode(void)
2128 tcgetattr(0, &term_orig);
2129 term_vi = term_orig;
2130 term_vi.c_lflag &= (~ICANON & ~ECHO); // leave ISIG ON- allow intr's
2131 term_vi.c_iflag &= (~IXON & ~ICRNL);
2132 term_vi.c_oflag &= (~ONLCR);
2133 term_vi.c_cc[VMIN] = 1;
2134 term_vi.c_cc[VTIME] = 0;
2135 erase_char = term_vi.c_cc[VERASE];
2136 tcsetattr_stdin_TCSANOW(&term_vi);
2139 static void cookmode(void)
2142 tcsetattr_stdin_TCSANOW(&term_orig);
2145 //----- Come here when we get a window resize signal ---------
2146 #if ENABLE_FEATURE_VI_USE_SIGNALS
2147 static void winch_sig(int sig UNUSED_PARAM)
2149 // FIXME: do it in main loop!!!
2150 signal(SIGWINCH, winch_sig);
2151 if (ENABLE_FEATURE_VI_WIN_RESIZE) {
2152 get_terminal_width_height(0, &columns, &rows);
2153 if (rows > MAX_SCR_ROWS) rows = MAX_SCR_ROWS;
2154 if (columns > MAX_SCR_COLS) columns = MAX_SCR_COLS;
2156 new_screen(rows, columns); // get memory for virtual screen
2157 redraw(TRUE); // re-draw the screen
2160 //----- Come here when we get a continue signal -------------------
2161 static void cont_sig(int sig UNUSED_PARAM)
2163 rawmode(); // terminal to "raw"
2164 last_status_cksum = 0; // force status update
2165 redraw(TRUE); // re-draw the screen
2167 signal(SIGTSTP, suspend_sig);
2168 signal(SIGCONT, SIG_DFL);
2169 kill(my_pid, SIGCONT); // huh? why? we are already "continued"...
2172 //----- Come here when we get a Suspend signal -------------------
2173 static void suspend_sig(int sig UNUSED_PARAM)
2175 go_bottom_and_clear_to_eol();
2176 cookmode(); // terminal to "cooked"
2178 signal(SIGCONT, cont_sig);
2179 signal(SIGTSTP, SIG_DFL);
2180 kill(my_pid, SIGTSTP);
2183 //----- Come here when we get a signal ---------------------------
2184 static void catch_sig(int sig)
2186 signal(SIGINT, catch_sig);
2188 siglongjmp(restart, sig);
2190 #endif /* FEATURE_VI_USE_SIGNALS */
2192 static int mysleep(int hund) // sleep for 'h' 1/100 seconds
2194 struct pollfd pfd[1];
2197 pfd[0].events = POLLIN;
2198 return safe_poll(pfd, 1, hund*10) > 0;
2201 //----- IO Routines --------------------------------------------
2202 static int readit(void) // read (maybe cursor) key from stdin
2207 c = read_key(STDIN_FILENO, readbuffer);
2208 if (c == -1) { // EOF/error
2209 go_bottom_and_clear_to_eol();
2210 cookmode(); // terminal to "cooked"
2211 bb_error_msg_and_die("can't read user input");
2216 //----- IO Routines --------------------------------------------
2217 static int get_one_char(void)
2221 #if ENABLE_FEATURE_VI_DOT_CMD
2223 // we are not adding to the q.
2224 // but, we may be reading from a q
2226 // there is no current q, read from STDIN
2227 c = readit(); // get the users input
2229 // there is a queue to get chars from first
2230 // careful with correct sign expansion!
2231 c = (unsigned char)*ioq++;
2233 // the end of the q, read from STDIN
2235 ioq_start = ioq = 0;
2236 c = readit(); // get the users input
2240 // adding STDIN chars to q
2241 c = readit(); // get the users input
2242 if (lmc_len >= MAX_INPUT_LEN - 1) {
2243 status_line_bold("last_modifying_cmd overrun");
2245 // add new char to q
2246 last_modifying_cmd[lmc_len++] = c;
2250 c = readit(); // get the users input
2251 #endif /* FEATURE_VI_DOT_CMD */
2255 // Get input line (uses "status line" area)
2256 static char *get_input_line(const char *prompt)
2258 // char [MAX_INPUT_LEN]
2259 #define buf get_input_line__buf
2264 strcpy(buf, prompt);
2265 last_status_cksum = 0; // force status update
2266 go_bottom_and_clear_to_eol();
2267 write1(prompt); // write out the :, /, or ? prompt
2270 while (i < MAX_INPUT_LEN) {
2272 if (c == '\n' || c == '\r' || c == 27)
2273 break; // this is end of input
2274 if (c == erase_char || c == 8 || c == 127) {
2275 // user wants to erase prev char
2277 write1("\b \b"); // erase char on screen
2278 if (i <= 0) // user backs up before b-o-l, exit
2280 } else if (c > 0 && c < 256) { // exclude Unicode
2281 // (TODO: need to handle Unicode)
2292 static int file_size(const char *fn) // what is the byte size of "fn"
2298 if (fn && fn[0] && stat(fn, &st_buf) == 0) // see if file exists
2299 cnt = (int) st_buf.st_size;
2303 // might reallocate text[]!
2304 static int file_insert(const char *fn, char *p, int update_ro_status)
2308 struct stat statbuf;
2311 if (stat(fn, &statbuf) < 0) {
2312 status_line_bold("\"%s\" %s", fn, strerror(errno));
2315 if (!S_ISREG(statbuf.st_mode)) {
2316 // This is not a regular file
2317 status_line_bold("\"%s\" Not a regular file", fn);
2320 if (p < text || p > end) {
2321 status_line_bold("Trying to insert file outside of memory");
2325 // read file to buffer
2326 fd = open(fn, O_RDONLY);
2328 status_line_bold("\"%s\" %s", fn, strerror(errno));
2331 size = statbuf.st_size;
2332 p += text_hole_make(p, size);
2333 cnt = safe_read(fd, p, size);
2335 status_line_bold("\"%s\" %s", fn, strerror(errno));
2336 p = text_hole_delete(p, p + size - 1); // un-do buffer insert
2337 } else if (cnt < size) {
2338 // There was a partial read, shrink unused space text[]
2339 p = text_hole_delete(p + cnt, p + (size - cnt) - 1); // un-do buffer insert
2340 status_line_bold("cannot read all of file \"%s\"", fn);
2346 #if ENABLE_FEATURE_VI_READONLY
2347 if (update_ro_status
2348 && ((access(fn, W_OK) < 0) ||
2349 /* root will always have access()
2350 * so we check fileperms too */
2351 !(statbuf.st_mode & (S_IWUSR | S_IWGRP | S_IWOTH))
2354 SET_READONLY_FILE(readonly_mode);
2360 static int file_write(char *fn, char *first, char *last)
2362 int fd, cnt, charcnt;
2365 status_line_bold("No current filename");
2369 /* By popular request we do not open file with O_TRUNC,
2370 * but instead ftruncate() it _after_ successful write.
2371 * Might reduce amount of data lost on power fail etc.
2373 fd = open(fn, (O_WRONLY | O_CREAT), 0666);
2376 cnt = last - first + 1;
2377 charcnt = full_write(fd, first, cnt);
2378 ftruncate(fd, charcnt);
2379 if (charcnt == cnt) {
2381 //file_modified = FALSE;
2389 //----- Terminal Drawing ---------------------------------------
2390 // The terminal is made up of 'rows' line of 'columns' columns.
2391 // classically this would be 24 x 80.
2392 // screen coordinates
2398 // 23,0 ... 23,79 <- status line
2400 //----- Move the cursor to row x col (count from 0, not 1) -------
2401 static void place_cursor(int row, int col, int optimize)
2403 char cm1[sizeof(CMrc) + sizeof(int)*3 * 2];
2404 #if ENABLE_FEATURE_VI_OPTIMIZE_CURSOR
2406 SZ_UP = sizeof(CMup),
2407 SZ_DN = sizeof(CMdown),
2408 SEQ_SIZE = SZ_UP > SZ_DN ? SZ_UP : SZ_DN,
2410 char cm2[SEQ_SIZE * 5 + 32]; // bigger than worst case size
2414 if (row < 0) row = 0;
2415 if (row >= rows) row = rows - 1;
2416 if (col < 0) col = 0;
2417 if (col >= columns) col = columns - 1;
2419 //----- 1. Try the standard terminal ESC sequence
2420 sprintf(cm1, CMrc, row + 1, col + 1);
2423 #if ENABLE_FEATURE_VI_OPTIMIZE_CURSOR
2424 if (optimize && col < 16) {
2426 int Rrow = last_row;
2427 int diff = Rrow - row;
2429 if (diff < -5 || diff > 5)
2432 //----- find the minimum # of chars to move cursor -------------
2433 //----- 2. Try moving with discreet chars (Newline, [back]space, ...)
2436 // move to the correct row
2437 while (row < Rrow) {
2438 // the cursor has to move up
2442 while (row > Rrow) {
2443 // the cursor has to move down
2444 strcat(cm2, CMdown);
2448 // now move to the correct column
2449 strcat(cm2, "\r"); // start at col 0
2450 // just send out orignal source char to get to correct place
2451 screenp = &screen[row * columns]; // start of screen line
2452 strncat(cm2, screenp, col);
2454 // pick the shortest cursor motion to send out
2455 if (strlen(cm2) < strlen(cm)) {
2461 #endif /* FEATURE_VI_OPTIMIZE_CURSOR */
2465 //----- Erase from cursor to end of line -----------------------
2466 static void clear_to_eol(void)
2468 write1(Ceol); // Erase from cursor to end of line
2471 static void go_bottom_and_clear_to_eol(void)
2473 place_cursor(rows - 1, 0, FALSE); // go to bottom of screen
2474 clear_to_eol(); // erase to end of line
2477 //----- Erase from cursor to end of screen -----------------------
2478 static void clear_to_eos(void)
2480 write1(Ceos); // Erase from cursor to end of screen
2483 //----- Start standout mode ------------------------------------
2484 static void standout_start(void) // send "start reverse video" sequence
2486 write1(SOs); // Start reverse video mode
2489 //----- End standout mode --------------------------------------
2490 static void standout_end(void) // send "end reverse video" sequence
2492 write1(SOn); // End reverse video mode
2495 //----- Flash the screen --------------------------------------
2496 static void flash(int h)
2498 standout_start(); // send "start reverse video" sequence
2501 standout_end(); // send "end reverse video" sequence
2505 static void Indicate_Error(void)
2507 #if ENABLE_FEATURE_VI_CRASHME
2509 return; // generate a random command
2512 write1(bell); // send out a bell character
2518 //----- Screen[] Routines --------------------------------------
2519 //----- Erase the Screen[] memory ------------------------------
2520 static void screen_erase(void)
2522 memset(screen, ' ', screensize); // clear new screen
2525 static int bufsum(char *buf, int count)
2528 char *e = buf + count;
2531 sum += (unsigned char) *buf++;
2535 //----- Draw the status line at bottom of the screen -------------
2536 static void show_status_line(void)
2538 int cnt = 0, cksum = 0;
2540 // either we already have an error or status message, or we
2542 if (!have_status_msg) {
2543 cnt = format_edit_status();
2544 cksum = bufsum(status_buffer, cnt);
2546 if (have_status_msg || ((cnt > 0 && last_status_cksum != cksum))) {
2547 last_status_cksum = cksum; // remember if we have seen this line
2548 go_bottom_and_clear_to_eol();
2549 write1(status_buffer);
2550 if (have_status_msg) {
2551 if (((int)strlen(status_buffer) - (have_status_msg - 1)) >
2553 have_status_msg = 0;
2556 have_status_msg = 0;
2558 place_cursor(crow, ccol, FALSE); // put cursor back in correct place
2563 //----- format the status buffer, the bottom line of screen ------
2564 // format status buffer, with STANDOUT mode
2565 static void status_line_bold(const char *format, ...)
2569 va_start(args, format);
2570 strcpy(status_buffer, SOs); // Terminal standout mode on
2571 vsprintf(status_buffer + sizeof(SOs)-1, format, args);
2572 strcat(status_buffer, SOn); // Terminal standout mode off
2575 have_status_msg = 1 + sizeof(SOs) + sizeof(SOn) - 2;
2578 // format status buffer
2579 static void status_line(const char *format, ...)
2583 va_start(args, format);
2584 vsprintf(status_buffer, format, args);
2587 have_status_msg = 1;
2590 // copy s to buf, convert unprintable
2591 static void print_literal(char *buf, const char *s)
2604 c_is_no_print = (c & 0x80) && !Isprint(c);
2605 if (c_is_no_print) {
2609 if (c < ' ' || c == 127) {
2622 if (strlen(buf) > MAX_INPUT_LEN - 10) // paranoia
2627 static void not_implemented(const char *s)
2629 char buf[MAX_INPUT_LEN];
2631 print_literal(buf, s);
2632 status_line_bold("\'%s\' is not implemented", buf);
2635 // show file status on status line
2636 static int format_edit_status(void)
2638 static const char cmd_mode_indicator[] ALIGN1 = "-IR-";
2640 #define tot format_edit_status__tot
2642 int cur, percent, ret, trunc_at;
2644 // file_modified is now a counter rather than a flag. this
2645 // helps reduce the amount of line counting we need to do.
2646 // (this will cause a mis-reporting of modified status
2647 // once every MAXINT editing operations.)
2649 // it would be nice to do a similar optimization here -- if
2650 // we haven't done a motion that could have changed which line
2651 // we're on, then we shouldn't have to do this count_lines()
2652 cur = count_lines(text, dot);
2654 // reduce counting -- the total lines can't have
2655 // changed if we haven't done any edits.
2656 if (file_modified != last_file_modified) {
2657 tot = cur + count_lines(dot, end - 1) - 1;
2658 last_file_modified = file_modified;
2661 // current line percent
2662 // ------------- ~~ ----------
2665 percent = (100 * cur) / tot;
2671 trunc_at = columns < STATUS_BUFFER_LEN-1 ?
2672 columns : STATUS_BUFFER_LEN-1;
2674 ret = snprintf(status_buffer, trunc_at+1,
2675 #if ENABLE_FEATURE_VI_READONLY
2676 "%c %s%s%s %d/%d %d%%",
2678 "%c %s%s %d/%d %d%%",
2680 cmd_mode_indicator[cmd_mode & 3],
2681 (current_filename != NULL ? current_filename : "No file"),
2682 #if ENABLE_FEATURE_VI_READONLY
2683 (readonly_mode ? " [Readonly]" : ""),
2685 (file_modified ? " [Modified]" : ""),
2688 if (ret >= 0 && ret < trunc_at)
2689 return ret; /* it all fit */
2691 return trunc_at; /* had to truncate */
2695 //----- Force refresh of all Lines -----------------------------
2696 static void redraw(int full_screen)
2698 place_cursor(0, 0, FALSE); // put cursor in correct place
2699 clear_to_eos(); // tell terminal to erase display
2700 screen_erase(); // erase the internal screen buffer
2701 last_status_cksum = 0; // force status update
2702 refresh(full_screen); // this will redraw the entire display
2706 //----- Format a text[] line into a buffer ---------------------
2707 static char* format_line(char *src /*, int li*/)
2712 char *dest = scr_out_buf; // [MAX_SCR_COLS + MAX_TABSTOP * 2]
2714 c = '~'; // char in col 0 in non-existent lines is '~'
2716 while (co < columns + tabstop) {
2717 // have we gone past the end?
2722 if ((c & 0x80) && !Isprint(c)) {
2725 if (c < ' ' || c == 0x7f) {
2729 while ((co % tabstop) != (tabstop - 1)) {
2737 c += '@'; // Ctrl-X -> 'X'
2742 // discard scrolled-off-to-the-left portion,
2743 // in tabstop-sized pieces
2744 if (ofs >= tabstop && co >= tabstop) {
2745 memmove(dest, dest + tabstop, co);
2752 // check "short line, gigantic offset" case
2755 // discard last scrolled off part
2758 // fill the rest with spaces
2760 memset(&dest[co], ' ', columns - co);
2764 //----- Refresh the changed screen lines -----------------------
2765 // Copy the source line from text[] into the buffer and note
2766 // if the current screenline is different from the new buffer.
2767 // If they differ then that line needs redrawing on the terminal.
2769 static void refresh(int full_screen)
2771 #define old_offset refresh__old_offset
2774 char *tp, *sp; // pointer into text[] and screen[]
2776 if (ENABLE_FEATURE_VI_WIN_RESIZE) {
2777 unsigned c = columns, r = rows;
2778 get_terminal_width_height(0, &columns, &rows);
2779 if (rows > MAX_SCR_ROWS) rows = MAX_SCR_ROWS;
2780 if (columns > MAX_SCR_COLS) columns = MAX_SCR_COLS;
2781 full_screen |= (c - columns) | (r - rows);
2783 sync_cursor(dot, &crow, &ccol); // where cursor will be (on "dot")
2784 tp = screenbegin; // index into text[] of top line
2786 // compare text[] to screen[] and mark screen[] lines that need updating
2787 for (li = 0; li < rows - 1; li++) {
2788 int cs, ce; // column start & end
2790 // format current text line
2791 out_buf = format_line(tp /*, li*/);
2793 // skip to the end of the current text[] line
2795 char *t = memchr(tp, '\n', end - tp);
2796 if (!t) t = end - 1;
2800 // see if there are any changes between vitual screen and out_buf
2801 changed = FALSE; // assume no change
2804 sp = &screen[li * columns]; // start of screen line
2806 // force re-draw of every single column from 0 - columns-1
2809 // compare newly formatted buffer with virtual screen
2810 // look forward for first difference between buf and screen
2811 for (; cs <= ce; cs++) {
2812 if (out_buf[cs] != sp[cs]) {
2813 changed = TRUE; // mark for redraw
2818 // look backward for last difference between out_buf and screen
2819 for (; ce >= cs; ce--) {
2820 if (out_buf[ce] != sp[ce]) {
2821 changed = TRUE; // mark for redraw
2825 // now, cs is index of first diff, and ce is index of last diff
2827 // if horz offset has changed, force a redraw
2828 if (offset != old_offset) {
2833 // make a sanity check of columns indexes
2835 if (ce > columns - 1) ce = columns - 1;
2836 if (cs > ce) { cs = 0; ce = columns - 1; }
2837 // is there a change between vitual screen and out_buf
2839 // copy changed part of buffer to virtual screen
2840 memcpy(sp+cs, out_buf+cs, ce-cs+1);
2842 // move cursor to column of first change
2843 //if (offset != old_offset) {
2844 // // place_cursor is still too stupid
2845 // // to handle offsets correctly
2846 // place_cursor(li, cs, FALSE);
2848 place_cursor(li, cs, TRUE);
2851 // write line out to terminal
2852 fwrite(&sp[cs], ce - cs + 1, 1, stdout);
2856 place_cursor(crow, ccol, TRUE);
2858 old_offset = offset;
2862 //---------------------------------------------------------------------
2863 //----- the Ascii Chart -----------------------------------------------
2865 // 00 nul 01 soh 02 stx 03 etx 04 eot 05 enq 06 ack 07 bel
2866 // 08 bs 09 ht 0a nl 0b vt 0c np 0d cr 0e so 0f si
2867 // 10 dle 11 dc1 12 dc2 13 dc3 14 dc4 15 nak 16 syn 17 etb
2868 // 18 can 19 em 1a sub 1b esc 1c fs 1d gs 1e rs 1f us
2869 // 20 sp 21 ! 22 " 23 # 24 $ 25 % 26 & 27 '
2870 // 28 ( 29 ) 2a * 2b + 2c , 2d - 2e . 2f /
2871 // 30 0 31 1 32 2 33 3 34 4 35 5 36 6 37 7
2872 // 38 8 39 9 3a : 3b ; 3c < 3d = 3e > 3f ?
2873 // 40 @ 41 A 42 B 43 C 44 D 45 E 46 F 47 G
2874 // 48 H 49 I 4a J 4b K 4c L 4d M 4e N 4f O
2875 // 50 P 51 Q 52 R 53 S 54 T 55 U 56 V 57 W
2876 // 58 X 59 Y 5a Z 5b [ 5c \ 5d ] 5e ^ 5f _
2877 // 60 ` 61 a 62 b 63 c 64 d 65 e 66 f 67 g
2878 // 68 h 69 i 6a j 6b k 6c l 6d m 6e n 6f o
2879 // 70 p 71 q 72 r 73 s 74 t 75 u 76 v 77 w
2880 // 78 x 79 y 7a z 7b { 7c | 7d } 7e ~ 7f del
2881 //---------------------------------------------------------------------
2883 //----- Execute a Vi Command -----------------------------------
2884 static void do_cmd(int c)
2886 const char *msg = msg; // for compiler
2887 char *p, *q, *save_dot;
2893 // c1 = c; // quiet the compiler
2894 // cnt = yf = 0; // quiet the compiler
2895 // msg = p = q = save_dot = buf; // quiet the compiler
2896 memset(buf, '\0', 12);
2900 /* if this is a cursor key, skip these checks */
2908 case KEYCODE_PAGEUP:
2909 case KEYCODE_PAGEDOWN:
2910 case KEYCODE_DELETE:
2914 if (cmd_mode == 2) {
2915 // flip-flop Insert/Replace mode
2916 if (c == KEYCODE_INSERT)
2918 // we are 'R'eplacing the current *dot with new char
2920 // don't Replace past E-o-l
2921 cmd_mode = 1; // convert to insert
2923 if (1 <= c || Isprint(c)) {
2925 dot = yank_delete(dot, dot, 0, YANKDEL); // delete char
2926 dot = char_insert(dot, c); // insert new char
2931 if (cmd_mode == 1) {
2932 // hitting "Insert" twice means "R" replace mode
2933 if (c == KEYCODE_INSERT) goto dc5;
2934 // insert the char c at "dot"
2935 if (1 <= c || Isprint(c)) {
2936 dot = char_insert(dot, c);
2951 #if ENABLE_FEATURE_VI_CRASHME
2952 case 0x14: // dc4 ctrl-T
2953 crashme = (crashme == 0) ? 1 : 0;
2982 //case 'u': // u- FIXME- there is no undo
2984 default: // unrecognised command
2992 not_implemented(buf);
2993 end_cmd_q(); // stop adding to q
2994 case 0x00: // nul- ignore
2996 case 2: // ctrl-B scroll up full screen
2997 case KEYCODE_PAGEUP: // Cursor Key Page Up
2998 dot_scroll(rows - 2, -1);
3000 case 4: // ctrl-D scroll down half screen
3001 dot_scroll((rows - 2) / 2, 1);
3003 case 5: // ctrl-E scroll down one line
3006 case 6: // ctrl-F scroll down full screen
3007 case KEYCODE_PAGEDOWN: // Cursor Key Page Down
3008 dot_scroll(rows - 2, 1);
3010 case 7: // ctrl-G show current status
3011 last_status_cksum = 0; // force status update
3013 case 'h': // h- move left
3014 case KEYCODE_LEFT: // cursor key Left
3015 case 8: // ctrl-H- move left (This may be ERASE char)
3016 case 0x7f: // DEL- move left (This may be ERASE char)
3022 case 10: // Newline ^J
3023 case 'j': // j- goto next line, same col
3024 case KEYCODE_DOWN: // cursor key Down
3028 dot_next(); // go to next B-o-l
3029 dot = move_to_col(dot, ccol + offset); // try stay in same col
3031 case 12: // ctrl-L force redraw whole screen
3032 case 18: // ctrl-R force redraw
3033 place_cursor(0, 0, FALSE); // put cursor in correct place
3034 clear_to_eos(); // tel terminal to erase display
3036 screen_erase(); // erase the internal screen buffer
3037 last_status_cksum = 0; // force status update
3038 refresh(TRUE); // this will redraw the entire display
3040 case 13: // Carriage Return ^M
3041 case '+': // +- goto next line
3048 case 21: // ctrl-U scroll up half screen
3049 dot_scroll((rows - 2) / 2, -1);
3051 case 25: // ctrl-Y scroll up one line
3057 cmd_mode = 0; // stop insrting
3059 last_status_cksum = 0; // force status update
3061 case ' ': // move right
3062 case 'l': // move right
3063 case KEYCODE_RIGHT: // Cursor Key Right
3069 #if ENABLE_FEATURE_VI_YANKMARK
3070 case '"': // "- name a register to use for Delete/Yank
3071 c1 = (get_one_char() | 0x20) - 'a'; // | 0x20 is tolower()
3072 if ((unsigned)c1 <= 25) { // a-z?
3078 case '\'': // '- goto a specific mark
3079 c1 = (get_one_char() | 0x20) - 'a';
3080 if ((unsigned)c1 <= 25) { // a-z?
3083 if (text <= q && q < end) {
3085 dot_begin(); // go to B-o-l
3088 } else if (c1 == '\'') { // goto previous context
3089 dot = swap_context(dot); // swap current and previous context
3090 dot_begin(); // go to B-o-l
3096 case 'm': // m- Mark a line
3097 // this is really stupid. If there are any inserts or deletes
3098 // between text[0] and dot then this mark will not point to the
3099 // correct location! It could be off by many lines!
3100 // Well..., at least its quick and dirty.
3101 c1 = (get_one_char() | 0x20) - 'a';
3102 if ((unsigned)c1 <= 25) { // a-z?
3103 // remember the line
3109 case 'P': // P- Put register before
3110 case 'p': // p- put register after
3113 status_line_bold("Nothing in register %c", what_reg());
3116 // are we putting whole lines or strings
3117 if (strchr(p, '\n') != NULL) {
3119 dot_begin(); // putting lines- Put above
3122 // are we putting after very last line?
3123 if (end_line(dot) == (end - 1)) {
3124 dot = end; // force dot to end of text[]
3126 dot_next(); // next line, then put before
3131 dot_right(); // move to right, can move to NL
3133 string_insert(dot, p); // insert the string
3134 end_cmd_q(); // stop adding to q
3136 case 'U': // U- Undo; replace current line with original version
3137 if (reg[Ureg] != 0) {
3138 p = begin_line(dot);
3140 p = text_hole_delete(p, q); // delete cur line
3141 p += string_insert(p, reg[Ureg]); // insert orig line
3146 #endif /* FEATURE_VI_YANKMARK */
3147 case '$': // $- goto end of line
3148 case KEYCODE_END: // Cursor Key End
3152 dot = end_line(dot);
3154 case '%': // %- find matching char of pair () [] {}
3155 for (q = dot; q < end && *q != '\n'; q++) {
3156 if (strchr("()[]{}", *q) != NULL) {
3157 // we found half of a pair
3158 p = find_pair(q, *q);
3170 case 'f': // f- forward to a user specified char
3171 last_forward_char = get_one_char(); // get the search char
3173 // dont separate these two commands. 'f' depends on ';'
3175 //**** fall through to ... ';'
3176 case ';': // ;- look at rest of line for last forward char
3180 if (last_forward_char == 0)
3183 while (q < end - 1 && *q != '\n' && *q != last_forward_char) {
3186 if (*q == last_forward_char)
3189 case ',': // repeat latest 'f' in opposite direction
3193 if (last_forward_char == 0)
3196 while (q >= text && *q != '\n' && *q != last_forward_char) {
3199 if (q >= text && *q == last_forward_char)
3203 case '-': // -- goto prev line
3210 #if ENABLE_FEATURE_VI_DOT_CMD
3211 case '.': // .- repeat the last modifying command
3212 // Stuff the last_modifying_cmd back into stdin
3213 // and let it be re-executed.
3215 last_modifying_cmd[lmc_len] = 0;
3216 ioq = ioq_start = xstrdup(last_modifying_cmd);
3220 #if ENABLE_FEATURE_VI_SEARCH
3221 case '?': // /- search for a pattern
3222 case '/': // /- search for a pattern
3225 q = get_input_line(buf); // get input line- use "status line"
3226 if (q[0] && !q[1]) {
3227 if (last_search_pattern[0])
3228 last_search_pattern[0] = c;
3229 goto dc3; // if no pat re-use old pat
3231 if (q[0]) { // strlen(q) > 1: new pat- save it and find
3232 // there is a new pat
3233 free(last_search_pattern);
3234 last_search_pattern = xstrdup(q);
3235 goto dc3; // now find the pattern
3237 // user changed mind and erased the "/"- do nothing
3239 case 'N': // N- backward search for last pattern
3243 dir = BACK; // assume BACKWARD search
3245 if (last_search_pattern[0] == '?') {
3249 goto dc4; // now search for pattern
3251 case 'n': // n- repeat search for last pattern
3252 // search rest of text[] starting at next char
3253 // if search fails return orignal "p" not the "p+1" address
3258 dir = FORWARD; // assume FORWARD search
3260 if (last_search_pattern[0] == '?') {
3265 q = char_search(p, last_search_pattern + 1, dir, FULL);
3267 dot = q; // good search, update "dot"
3271 // no pattern found between "dot" and "end"- continue at top
3276 q = char_search(p, last_search_pattern + 1, dir, FULL);
3277 if (q != NULL) { // found something
3278 dot = q; // found new pattern- goto it
3279 msg = "search hit BOTTOM, continuing at TOP";
3281 msg = "search hit TOP, continuing at BOTTOM";
3284 msg = "Pattern not found";
3288 status_line_bold("%s", msg);
3290 case '{': // {- move backward paragraph
3291 q = char_search(dot, "\n\n", BACK, FULL);
3292 if (q != NULL) { // found blank line
3293 dot = next_line(q); // move to next blank line
3296 case '}': // }- move forward paragraph
3297 q = char_search(dot, "\n\n", FORWARD, FULL);
3298 if (q != NULL) { // found blank line
3299 dot = next_line(q); // move to next blank line
3302 #endif /* FEATURE_VI_SEARCH */
3303 case '0': // 0- goto begining of line
3313 if (c == '0' && cmdcnt < 1) {
3314 dot_begin(); // this was a standalone zero
3316 cmdcnt = cmdcnt * 10 + (c - '0'); // this 0 is part of a number
3319 case ':': // :- the colon mode commands
3320 p = get_input_line(":"); // get input line- use "status line"
3321 #if ENABLE_FEATURE_VI_COLON
3322 colon(p); // execute the command
3325 p++; // move past the ':'
3329 if (strncasecmp(p, "quit", cnt) == 0
3330 || strncasecmp(p, "q!", cnt) == 0 // delete lines
3332 if (file_modified && p[1] != '!') {
3333 status_line_bold("No write since last change (:quit! overrides)");
3337 } else if (strncasecmp(p, "write", cnt) == 0
3338 || strncasecmp(p, "wq", cnt) == 0
3339 || strncasecmp(p, "wn", cnt) == 0
3340 || strncasecmp(p, "x", cnt) == 0
3342 cnt = file_write(current_filename, text, end - 1);
3345 status_line_bold("Write error: %s", strerror(errno));
3348 last_file_modified = -1;
3349 status_line("\"%s\" %dL, %dC", current_filename, count_lines(text, end - 1), cnt);
3350 if (p[0] == 'x' || p[1] == 'q' || p[1] == 'n'
3351 || p[0] == 'X' || p[1] == 'Q' || p[1] == 'N'
3356 } else if (strncasecmp(p, "file", cnt) == 0) {
3357 last_status_cksum = 0; // force status update
3358 } else if (sscanf(p, "%d", &j) > 0) {
3359 dot = find_line(j); // go to line # j
3361 } else { // unrecognised cmd
3364 #endif /* !FEATURE_VI_COLON */
3366 case '<': // <- Left shift something
3367 case '>': // >- Right shift something
3368 cnt = count_lines(text, dot); // remember what line we are on
3369 c1 = get_one_char(); // get the type of thing to delete
3370 find_range(&p, &q, c1);
3371 yank_delete(p, q, 1, YANKONLY); // save copy before change
3374 i = count_lines(p, q); // # of lines we are shifting
3375 for ( ; i > 0; i--, p = next_line(p)) {
3377 // shift left- remove tab or 8 spaces
3379 // shrink buffer 1 char
3380 text_hole_delete(p, p);
3381 } else if (*p == ' ') {
3382 // we should be calculating columns, not just SPACE
3383 for (j = 0; *p == ' ' && j < tabstop; j++) {
3384 text_hole_delete(p, p);
3387 } else if (c == '>') {
3388 // shift right -- add tab or 8 spaces
3389 char_insert(p, '\t');
3392 dot = find_line(cnt); // what line were we on
3394 end_cmd_q(); // stop adding to q
3396 case 'A': // A- append at e-o-l
3397 dot_end(); // go to e-o-l
3398 //**** fall through to ... 'a'
3399 case 'a': // a- append after current char
3404 case 'B': // B- back a blank-delimited Word
3405 case 'E': // E- end of a blank-delimited word
3406 case 'W': // W- forward a blank-delimited word
3413 if (c == 'W' || isspace(dot[dir])) {
3414 dot = skip_thing(dot, 1, dir, S_TO_WS);
3415 dot = skip_thing(dot, 2, dir, S_OVER_WS);
3418 dot = skip_thing(dot, 1, dir, S_BEFORE_WS);
3420 case 'C': // C- Change to e-o-l
3421 case 'D': // D- delete to e-o-l
3423 dot = dollar_line(dot); // move to before NL
3424 // copy text into a register and delete
3425 dot = yank_delete(save_dot, dot, 0, YANKDEL); // delete to e-o-l
3427 goto dc_i; // start inserting
3428 #if ENABLE_FEATURE_VI_DOT_CMD
3430 end_cmd_q(); // stop adding to q
3433 case 'g': // 'gg' goto a line number (vim) (default: very first line)
3434 c1 = get_one_char();
3437 buf[1] = c1; // TODO: if Unicode?
3439 not_implemented(buf);
3445 case 'G': // G- goto to a line number (default= E-O-F)
3446 dot = end - 1; // assume E-O-F
3448 dot = find_line(cmdcnt); // what line is #cmdcnt
3452 case 'H': // H- goto top line on screen
3454 if (cmdcnt > (rows - 1)) {
3455 cmdcnt = (rows - 1);
3462 case 'I': // I- insert before first non-blank
3465 //**** fall through to ... 'i'
3466 case 'i': // i- insert before current char
3467 case KEYCODE_INSERT: // Cursor Key Insert
3469 cmd_mode = 1; // start insrting
3471 case 'J': // J- join current and next lines together
3475 dot_end(); // move to NL
3476 if (dot < end - 1) { // make sure not last char in text[]
3477 *dot++ = ' '; // replace NL with space
3479 while (isblank(*dot)) { // delete leading WS
3483 end_cmd_q(); // stop adding to q
3485 case 'L': // L- goto bottom line on screen
3487 if (cmdcnt > (rows - 1)) {
3488 cmdcnt = (rows - 1);
3496 case 'M': // M- goto middle line on screen
3498 for (cnt = 0; cnt < (rows-1) / 2; cnt++)
3499 dot = next_line(dot);
3501 case 'O': // O- open a empty line above
3503 p = begin_line(dot);
3504 if (p[-1] == '\n') {
3506 case 'o': // o- open a empty line below; Yes, I know it is in the middle of the "if (..."
3508 dot = char_insert(dot, '\n');
3511 dot = char_insert(dot, '\n'); // i\n ESC
3516 case 'R': // R- continuous Replace char
3520 case KEYCODE_DELETE:
3523 case 'X': // X- delete char before dot
3524 case 'x': // x- delete the current char
3525 case 's': // s- substitute the current char
3532 if (dot[dir] != '\n') {
3534 dot--; // delete prev char
3535 dot = yank_delete(dot, dot, 0, YANKDEL); // delete char
3538 goto dc_i; // start insrting
3539 end_cmd_q(); // stop adding to q
3541 case 'Z': // Z- if modified, {write}; exit
3542 // ZZ means to save file (if necessary), then exit
3543 c1 = get_one_char();
3548 if (file_modified) {
3549 if (ENABLE_FEATURE_VI_READONLY && readonly_mode) {
3550 status_line_bold("\"%s\" File is read only", current_filename);
3553 cnt = file_write(current_filename, text, end - 1);
3556 status_line_bold("Write error: %s", strerror(errno));
3557 } else if (cnt == (end - 1 - text + 1)) {
3564 case '^': // ^- move to first non-blank on line
3568 case 'b': // b- back a word
3569 case 'e': // e- end of word
3576 if ((dot + dir) < text || (dot + dir) > end - 1)
3579 if (isspace(*dot)) {
3580 dot = skip_thing(dot, (c == 'e') ? 2 : 1, dir, S_OVER_WS);
3582 if (isalnum(*dot) || *dot == '_') {
3583 dot = skip_thing(dot, 1, dir, S_END_ALNUM);
3584 } else if (ispunct(*dot)) {
3585 dot = skip_thing(dot, 1, dir, S_END_PUNCT);
3588 case 'c': // c- change something
3589 case 'd': // d- delete something
3590 #if ENABLE_FEATURE_VI_YANKMARK
3591 case 'y': // y- yank something
3592 case 'Y': // Y- Yank a line
3595 int yf, ml, whole = 0;
3596 yf = YANKDEL; // assume either "c" or "d"
3597 #if ENABLE_FEATURE_VI_YANKMARK
3598 if (c == 'y' || c == 'Y')
3603 c1 = get_one_char(); // get the type of thing to delete
3604 // determine range, and whether it spans lines
3605 ml = find_range(&p, &q, c1);
3606 if (c1 == 27) { // ESC- user changed mind and wants out
3607 c = c1 = 27; // Escape- do nothing
3608 } else if (strchr("wW", c1)) {
3610 // don't include trailing WS as part of word
3611 while (isblank(*q)) {
3612 if (q <= text || q[-1] == '\n')
3617 dot = yank_delete(p, q, ml, yf); // delete word
3618 } else if (strchr("^0bBeEft%$ lh\b\177", c1)) {
3619 // partial line copy text into a register and delete
3620 dot = yank_delete(p, q, ml, yf); // delete word
3621 } else if (strchr("cdykjHL+-{}\r\n", c1)) {
3622 // whole line copy text into a register and delete
3623 dot = yank_delete(p, q, ml, yf); // delete lines
3626 // could not recognize object
3627 c = c1 = 27; // error-
3633 dot = char_insert(dot, '\n');
3634 // on the last line of file don't move to prev line
3635 if (whole && dot != (end-1)) {
3638 } else if (c == 'd') {
3644 // if CHANGING, not deleting, start inserting after the delete
3646 strcpy(buf, "Change");
3647 goto dc_i; // start inserting
3650 strcpy(buf, "Delete");
3652 #if ENABLE_FEATURE_VI_YANKMARK
3653 if (c == 'y' || c == 'Y') {
3654 strcpy(buf, "Yank");
3658 for (cnt = 0; p <= q; p++) {
3662 status_line("%s %d lines (%d chars) using [%c]",
3663 buf, cnt, strlen(reg[YDreg]), what_reg());
3665 end_cmd_q(); // stop adding to q
3669 case 'k': // k- goto prev line, same col
3670 case KEYCODE_UP: // cursor key Up
3675 dot = move_to_col(dot, ccol + offset); // try stay in same col
3677 case 'r': // r- replace the current char with user input
3678 c1 = get_one_char(); // get the replacement char
3683 end_cmd_q(); // stop adding to q
3685 case 't': // t- move to char prior to next x
3686 last_forward_char = get_one_char();
3688 if (*dot == last_forward_char)
3690 last_forward_char = 0;
3692 case 'w': // w- forward a word
3696 if (isalnum(*dot) || *dot == '_') { // we are on ALNUM
3697 dot = skip_thing(dot, 1, FORWARD, S_END_ALNUM);
3698 } else if (ispunct(*dot)) { // we are on PUNCT
3699 dot = skip_thing(dot, 1, FORWARD, S_END_PUNCT);
3702 dot++; // move over word
3703 if (isspace(*dot)) {
3704 dot = skip_thing(dot, 2, FORWARD, S_OVER_WS);
3708 c1 = get_one_char(); // get the replacement char
3711 cnt = (rows - 2) / 2; // put dot at center
3713 cnt = rows - 2; // put dot at bottom
3714 screenbegin = begin_line(dot); // start dot at top
3715 dot_scroll(cnt, -1);
3717 case '|': // |- move to column "cmdcnt"
3718 dot = move_to_col(dot, cmdcnt - 1); // try to move to column
3720 case '~': // ~- flip the case of letters a-z -> A-Z
3724 if (islower(*dot)) {
3725 *dot = toupper(*dot);
3727 } else if (isupper(*dot)) {
3728 *dot = tolower(*dot);
3732 end_cmd_q(); // stop adding to q
3734 //----- The Cursor and Function Keys -----------------------------
3735 case KEYCODE_HOME: // Cursor Key Home
3738 // The Fn keys could point to do_macro which could translate them
3740 case KEYCODE_FUN1: // Function Key F1
3741 case KEYCODE_FUN2: // Function Key F2
3742 case KEYCODE_FUN3: // Function Key F3
3743 case KEYCODE_FUN4: // Function Key F4
3744 case KEYCODE_FUN5: // Function Key F5
3745 case KEYCODE_FUN6: // Function Key F6
3746 case KEYCODE_FUN7: // Function Key F7
3747 case KEYCODE_FUN8: // Function Key F8
3748 case KEYCODE_FUN9: // Function Key F9
3749 case KEYCODE_FUN10: // Function Key F10
3750 case KEYCODE_FUN11: // Function Key F11
3751 case KEYCODE_FUN12: // Function Key F12
3757 // if text[] just became empty, add back an empty line
3759 char_insert(text, '\n'); // start empty buf with dummy line
3762 // it is OK for dot to exactly equal to end, otherwise check dot validity
3764 dot = bound_dot(dot); // make sure "dot" is valid
3766 #if ENABLE_FEATURE_VI_YANKMARK
3767 check_context(c); // update the current context
3771 cmdcnt = 0; // cmd was not a number, reset cmdcnt
3772 cnt = dot - begin_line(dot);
3773 // Try to stay off of the Newline
3774 if (*dot == '\n' && cnt > 0 && cmd_mode == 0)
3778 /* NB! the CRASHME code is unmaintained, and doesn't currently build */
3779 #if ENABLE_FEATURE_VI_CRASHME
3780 static int totalcmds = 0;
3781 static int Mp = 85; // Movement command Probability
3782 static int Np = 90; // Non-movement command Probability
3783 static int Dp = 96; // Delete command Probability
3784 static int Ip = 97; // Insert command Probability
3785 static int Yp = 98; // Yank command Probability
3786 static int Pp = 99; // Put command Probability
3787 static int M = 0, N = 0, I = 0, D = 0, Y = 0, P = 0, U = 0;
3788 static const char chars[20] = "\t012345 abcdABCD-=.$";
3789 static const char *const words[20] = {
3790 "this", "is", "a", "test",
3791 "broadcast", "the", "emergency", "of",
3792 "system", "quick", "brown", "fox",
3793 "jumped", "over", "lazy", "dogs",
3794 "back", "January", "Febuary", "March"
3796 static const char *const lines[20] = {
3797 "You should have received a copy of the GNU General Public License\n",
3798 "char c, cm, *cmd, *cmd1;\n",
3799 "generate a command by percentages\n",
3800 "Numbers may be typed as a prefix to some commands.\n",
3801 "Quit, discarding changes!\n",
3802 "Forced write, if permission originally not valid.\n",
3803 "In general, any ex or ed command (such as substitute or delete).\n",
3804 "I have tickets available for the Blazers vs LA Clippers for Monday, Janurary 1 at 1:00pm.\n",
3805 "Please get w/ me and I will go over it with you.\n",
3806 "The following is a list of scheduled, committed changes.\n",
3807 "1. Launch Norton Antivirus (Start, Programs, Norton Antivirus)\n",
3808 "Reminder....Town Meeting in Central Perk cafe today at 3:00pm.\n",
3809 "Any question about transactions please contact Sterling Huxley.\n",
3810 "I will try to get back to you by Friday, December 31.\n",
3811 "This Change will be implemented on Friday.\n",
3812 "Let me know if you have problems accessing this;\n",
3813 "Sterling Huxley recently added you to the access list.\n",
3814 "Would you like to go to lunch?\n",
3815 "The last command will be automatically run.\n",
3816 "This is too much english for a computer geek.\n",
3818 static char *multilines[20] = {
3819 "You should have received a copy of the GNU General Public License\n",
3820 "char c, cm, *cmd, *cmd1;\n",
3821 "generate a command by percentages\n",
3822 "Numbers may be typed as a prefix to some commands.\n",
3823 "Quit, discarding changes!\n",
3824 "Forced write, if permission originally not valid.\n",
3825 "In general, any ex or ed command (such as substitute or delete).\n",
3826 "I have tickets available for the Blazers vs LA Clippers for Monday, Janurary 1 at 1:00pm.\n",
3827 "Please get w/ me and I will go over it with you.\n",
3828 "The following is a list of scheduled, committed changes.\n",
3829 "1. Launch Norton Antivirus (Start, Programs, Norton Antivirus)\n",
3830 "Reminder....Town Meeting in Central Perk cafe today at 3:00pm.\n",
3831 "Any question about transactions please contact Sterling Huxley.\n",
3832 "I will try to get back to you by Friday, December 31.\n",
3833 "This Change will be implemented on Friday.\n",
3834 "Let me know if you have problems accessing this;\n",
3835 "Sterling Huxley recently added you to the access list.\n",
3836 "Would you like to go to lunch?\n",
3837 "The last command will be automatically run.\n",
3838 "This is too much english for a computer geek.\n",
3841 // create a random command to execute
3842 static void crash_dummy()
3844 static int sleeptime; // how long to pause between commands
3845 char c, cm, *cmd, *cmd1;
3846 int i, cnt, thing, rbi, startrbi, percent;
3848 // "dot" movement commands
3849 cmd1 = " \n\r\002\004\005\006\025\0310^$-+wWeEbBhjklHL";
3851 // is there already a command running?
3852 if (readbuffer[0] > 0)
3855 readbuffer[0] = 'X';
3857 sleeptime = 0; // how long to pause between commands
3858 memset(readbuffer, '\0', sizeof(readbuffer));
3859 // generate a command by percentages
3860 percent = (int) lrand48() % 100; // get a number from 0-99
3861 if (percent < Mp) { // Movement commands
3862 // available commands
3865 } else if (percent < Np) { // non-movement commands
3866 cmd = "mz<>\'\""; // available commands
3868 } else if (percent < Dp) { // Delete commands
3869 cmd = "dx"; // available commands
3871 } else if (percent < Ip) { // Inset commands
3872 cmd = "iIaAsrJ"; // available commands
3874 } else if (percent < Yp) { // Yank commands
3875 cmd = "yY"; // available commands
3877 } else if (percent < Pp) { // Put commands
3878 cmd = "pP"; // available commands
3881 // We do not know how to handle this command, try again
3885 // randomly pick one of the available cmds from "cmd[]"
3886 i = (int) lrand48() % strlen(cmd);
3888 if (strchr(":\024", cm))
3889 goto cd0; // dont allow colon or ctrl-T commands
3890 readbuffer[rbi++] = cm; // put cmd into input buffer
3892 // now we have the command-
3893 // there are 1, 2, and multi char commands
3894 // find out which and generate the rest of command as necessary
3895 if (strchr("dmryz<>\'\"", cm)) { // 2-char commands
3896 cmd1 = " \n\r0$^-+wWeEbBhjklHL";
3897 if (cm == 'm' || cm == '\'' || cm == '\"') { // pick a reg[]
3898 cmd1 = "abcdefghijklmnopqrstuvwxyz";
3900 thing = (int) lrand48() % strlen(cmd1); // pick a movement command
3902 readbuffer[rbi++] = c; // add movement to input buffer
3904 if (strchr("iIaAsc", cm)) { // multi-char commands
3906 // change some thing
3907 thing = (int) lrand48() % strlen(cmd1); // pick a movement command
3909 readbuffer[rbi++] = c; // add movement to input buffer
3911 thing = (int) lrand48() % 4; // what thing to insert
3912 cnt = (int) lrand48() % 10; // how many to insert
3913 for (i = 0; i < cnt; i++) {
3914 if (thing == 0) { // insert chars
3915 readbuffer[rbi++] = chars[((int) lrand48() % strlen(chars))];
3916 } else if (thing == 1) { // insert words
3917 strcat(readbuffer, words[(int) lrand48() % 20]);
3918 strcat(readbuffer, " ");
3919 sleeptime = 0; // how fast to type
3920 } else if (thing == 2) { // insert lines
3921 strcat(readbuffer, lines[(int) lrand48() % 20]);
3922 sleeptime = 0; // how fast to type
3923 } else { // insert multi-lines
3924 strcat(readbuffer, multilines[(int) lrand48() % 20]);
3925 sleeptime = 0; // how fast to type
3928 strcat(readbuffer, "\033");
3930 readbuffer[0] = strlen(readbuffer + 1);
3934 mysleep(sleeptime); // sleep 1/100 sec
3937 // test to see if there are any errors
3938 static void crash_test()
3940 static time_t oldtim;
3947 strcat(msg, "end<text ");
3949 if (end > textend) {
3950 strcat(msg, "end>textend ");
3953 strcat(msg, "dot<text ");
3956 strcat(msg, "dot>end ");
3958 if (screenbegin < text) {
3959 strcat(msg, "screenbegin<text ");
3961 if (screenbegin > end - 1) {
3962 strcat(msg, "screenbegin>end-1 ");
3966 printf("\n\n%d: \'%c\' %s\n\n\n%s[Hit return to continue]%s",
3967 totalcmds, last_input_char, msg, SOs, SOn);
3969 while (safe_read(STDIN_FILENO, d, 1) > 0) {
3970 if (d[0] == '\n' || d[0] == '\r')
3975 if (tim >= (oldtim + 3)) {
3976 sprintf(status_buffer,
3977 "Tot=%d: M=%d N=%d I=%d D=%d Y=%d P=%d U=%d size=%d",
3978 totalcmds, M, N, I, D, Y, P, U, end - text + 1);