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 //FIXME: this does not work properly for Unicode anyway
34 # define Isprint(c) (isprint)(c)
36 # define Isprint(c) isprint_asciionly(c)
41 /* 0x9b is Meta-ESC */
42 #if ENABLE_FEATURE_VI_8BIT
43 #define Isprint(c) ((unsigned char)(c) >= ' ' && (c) != 0x7f && (unsigned char)(c) != 0x9b)
45 #define Isprint(c) ((unsigned char)(c) >= ' ' && (unsigned char)(c) < 0x7f)
52 MAX_TABSTOP = 32, // sanity limit
53 // User input len. Need not be extra big.
54 // Lines in file being edited *can* be bigger than this.
56 // Sanity limits. We have only one buffer of this size.
57 MAX_SCR_COLS = CONFIG_FEATURE_VI_MAX_LEN,
58 MAX_SCR_ROWS = CONFIG_FEATURE_VI_MAX_LEN,
61 /* vt102 typical ESC sequence */
62 /* terminal standout start/normal ESC sequence */
65 /* terminal bell sequence */
67 /* Clear-end-of-line and Clear-end-of-screen ESC sequence */
70 /* Cursor motion arbitrary destination ESC sequence */
71 #define CMrc "\033[%u;%uH"
72 /* Cursor motion up and down ESC sequence */
76 #if ENABLE_FEATURE_VI_DOT_CMD || ENABLE_FEATURE_VI_YANKMARK
77 // cmds modifying text[]
78 // vda: removed "aAiIs" as they switch us into insert mode
79 // and remembering input for replay after them makes no sense
80 static const char modifying_cmds[] = "cCdDJoOpPrRxX<>~";
86 FORWARD = 1, // code depends on "1" for array index
87 BACK = -1, // code depends on "-1" for array index
88 LIMITED = 0, // how much of text[] in char_search
89 FULL = 1, // how much of text[] in char_search
91 S_BEFORE_WS = 1, // used in skip_thing() for moving "dot"
92 S_TO_WS = 2, // used in skip_thing() for moving "dot"
93 S_OVER_WS = 3, // used in skip_thing() for moving "dot"
94 S_END_PUNCT = 4, // used in skip_thing() for moving "dot"
95 S_END_ALNUM = 5, // used in skip_thing() for moving "dot"
99 /* vi.c expects chars to be unsigned. */
100 /* busybox build system provides that, but it's better */
101 /* to audit and fix the source */
104 /* many references - keep near the top of globals */
105 char *text, *end; // pointers to the user data in memory
106 char *dot; // where all the action takes place
107 int text_size; // size of the allocated buffer
111 #define VI_AUTOINDENT 1
112 #define VI_SHOWMATCH 2
113 #define VI_IGNORECASE 4
114 #define VI_ERR_METHOD 8
115 #define autoindent (vi_setops & VI_AUTOINDENT)
116 #define showmatch (vi_setops & VI_SHOWMATCH )
117 #define ignorecase (vi_setops & VI_IGNORECASE)
118 /* indicate error with beep or flash */
119 #define err_method (vi_setops & VI_ERR_METHOD)
121 #if ENABLE_FEATURE_VI_READONLY
122 smallint readonly_mode;
123 #define SET_READONLY_FILE(flags) ((flags) |= 0x01)
124 #define SET_READONLY_MODE(flags) ((flags) |= 0x02)
125 #define UNSET_READONLY_FILE(flags) ((flags) &= 0xfe)
127 #define SET_READONLY_FILE(flags) ((void)0)
128 #define SET_READONLY_MODE(flags) ((void)0)
129 #define UNSET_READONLY_FILE(flags) ((void)0)
132 smallint editing; // >0 while we are editing a file
133 // [code audit says "can be 0, 1 or 2 only"]
134 smallint cmd_mode; // 0=command 1=insert 2=replace
135 int file_modified; // buffer contents changed (counter, not flag!)
136 int last_file_modified; // = -1;
137 int fn_start; // index of first cmd line file name
138 int save_argc; // how many file names on cmd line
139 int cmdcnt; // repetition count
140 unsigned rows, columns; // the terminal screen is this size
141 #if ENABLE_FEATURE_VI_ASK_TERMINAL
142 int get_rowcol_error;
144 int crow, ccol; // cursor is on Crow x Ccol
145 int offset; // chars scrolled off the screen to the left
146 int have_status_msg; // is default edit status needed?
147 // [don't make smallint!]
148 int last_status_cksum; // hash of current status line
149 char *current_filename;
150 char *screenbegin; // index into text[], of top line on the screen
151 char *screen; // pointer to the virtual screen buffer
152 int screensize; // and its size
154 int last_forward_char; // last char searched for with 'f' (int because of Unicode)
155 char erase_char; // the users erase character
156 char last_input_char; // last char read from user
158 #if ENABLE_FEATURE_VI_DOT_CMD
159 smallint adding2q; // are we currently adding user input to q
160 int lmc_len; // length of last_modifying_cmd
161 char *ioq, *ioq_start; // pointer to string for get_one_char to "read"
163 #if ENABLE_FEATURE_VI_OPTIMIZE_CURSOR
164 int last_row; // where the cursor was last moved to
166 #if ENABLE_FEATURE_VI_USE_SIGNALS || ENABLE_FEATURE_VI_CRASHME
169 #if ENABLE_FEATURE_VI_SEARCH
170 char *last_search_pattern; // last pattern from a '/' or '?' search
174 #if ENABLE_FEATURE_VI_YANKMARK
175 char *edit_file__cur_line;
177 int refresh__old_offset;
178 int format_edit_status__tot;
180 /* a few references only */
181 #if ENABLE_FEATURE_VI_YANKMARK
182 int YDreg, Ureg; // default delete register and orig line for "U"
183 char *reg[28]; // named register a-z, "D", and "U" 0-25,26,27
184 char *mark[28]; // user marks points somewhere in text[]- a-z and previous context ''
185 char *context_start, *context_end;
187 #if ENABLE_FEATURE_VI_USE_SIGNALS
188 sigjmp_buf restart; // catch_sig()
190 struct termios term_orig, term_vi; // remember what the cooked mode was
191 #if ENABLE_FEATURE_VI_COLON
192 char *initial_cmds[3]; // currently 2 entries, NULL terminated
194 // Should be just enough to hold a key sequence,
195 // but CRASHME mode uses it as generated command buffer too
196 #if ENABLE_FEATURE_VI_CRASHME
197 char readbuffer[128];
199 char readbuffer[KEYCODE_BUFFER_SIZE];
201 #define STATUS_BUFFER_LEN 200
202 char status_buffer[STATUS_BUFFER_LEN]; // messages to the user
203 #if ENABLE_FEATURE_VI_DOT_CMD
204 char last_modifying_cmd[MAX_INPUT_LEN]; // last modifying cmd for "."
206 char get_input_line__buf[MAX_INPUT_LEN]; /* former static */
208 char scr_out_buf[MAX_SCR_COLS + MAX_TABSTOP * 2];
210 #define G (*ptr_to_globals)
211 #define text (G.text )
212 #define text_size (G.text_size )
217 #define vi_setops (G.vi_setops )
218 #define editing (G.editing )
219 #define cmd_mode (G.cmd_mode )
220 #define file_modified (G.file_modified )
221 #define last_file_modified (G.last_file_modified )
222 #define fn_start (G.fn_start )
223 #define save_argc (G.save_argc )
224 #define cmdcnt (G.cmdcnt )
225 #define rows (G.rows )
226 #define columns (G.columns )
227 #define crow (G.crow )
228 #define ccol (G.ccol )
229 #define offset (G.offset )
230 #define status_buffer (G.status_buffer )
231 #define have_status_msg (G.have_status_msg )
232 #define last_status_cksum (G.last_status_cksum )
233 #define current_filename (G.current_filename )
234 #define screen (G.screen )
235 #define screensize (G.screensize )
236 #define screenbegin (G.screenbegin )
237 #define tabstop (G.tabstop )
238 #define last_forward_char (G.last_forward_char )
239 #define erase_char (G.erase_char )
240 #define last_input_char (G.last_input_char )
241 #if ENABLE_FEATURE_VI_READONLY
242 #define readonly_mode (G.readonly_mode )
244 #define readonly_mode 0
246 #define adding2q (G.adding2q )
247 #define lmc_len (G.lmc_len )
249 #define ioq_start (G.ioq_start )
250 #define last_row (G.last_row )
251 #define my_pid (G.my_pid )
252 #define last_search_pattern (G.last_search_pattern)
254 #define edit_file__cur_line (G.edit_file__cur_line)
255 #define refresh__old_offset (G.refresh__old_offset)
256 #define format_edit_status__tot (G.format_edit_status__tot)
258 #define YDreg (G.YDreg )
259 #define Ureg (G.Ureg )
260 #define mark (G.mark )
261 #define context_start (G.context_start )
262 #define context_end (G.context_end )
263 #define restart (G.restart )
264 #define term_orig (G.term_orig )
265 #define term_vi (G.term_vi )
266 #define initial_cmds (G.initial_cmds )
267 #define readbuffer (G.readbuffer )
268 #define scr_out_buf (G.scr_out_buf )
269 #define last_modifying_cmd (G.last_modifying_cmd )
270 #define get_input_line__buf (G.get_input_line__buf)
272 #define INIT_G() do { \
273 SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \
274 last_file_modified = -1; \
275 /* "" but has space for 2 chars: */ \
276 IF_FEATURE_VI_SEARCH(last_search_pattern = xzalloc(2);) \
280 static int init_text_buffer(char *); // init from file or create new
281 static void edit_file(char *); // edit one file
282 static void do_cmd(int); // execute a command
283 static int next_tabstop(int);
284 static void sync_cursor(char *, int *, int *); // synchronize the screen cursor to dot
285 static char *begin_line(char *); // return pointer to cur line B-o-l
286 static char *end_line(char *); // return pointer to cur line E-o-l
287 static char *prev_line(char *); // return pointer to prev line B-o-l
288 static char *next_line(char *); // return pointer to next line B-o-l
289 static char *end_screen(void); // get pointer to last char on screen
290 static int count_lines(char *, char *); // count line from start to stop
291 static char *find_line(int); // find begining of line #li
292 static char *move_to_col(char *, int); // move "p" to column l
293 static void dot_left(void); // move dot left- dont leave line
294 static void dot_right(void); // move dot right- dont leave line
295 static void dot_begin(void); // move dot to B-o-l
296 static void dot_end(void); // move dot to E-o-l
297 static void dot_next(void); // move dot to next line B-o-l
298 static void dot_prev(void); // move dot to prev line B-o-l
299 static void dot_scroll(int, int); // move the screen up or down
300 static void dot_skip_over_ws(void); // move dot pat WS
301 static void dot_delete(void); // delete the char at 'dot'
302 static char *bound_dot(char *); // make sure text[0] <= P < "end"
303 static char *new_screen(int, int); // malloc virtual screen memory
304 static char *char_insert(char *, char); // insert the char c at 'p'
305 // might reallocate text[]! use p += stupid_insert(p, ...),
306 // and be careful to not use pointers into potentially freed text[]!
307 static uintptr_t stupid_insert(char *, char); // stupidly insert the char c at 'p'
308 static int find_range(char **, char **, char); // return pointers for an object
309 static int st_test(char *, int, int, char *); // helper for skip_thing()
310 static char *skip_thing(char *, int, int, int); // skip some object
311 static char *find_pair(char *, char); // find matching pair () [] {}
312 static char *text_hole_delete(char *, char *); // at "p", delete a 'size' byte hole
313 // might reallocate text[]! use p += text_hole_make(p, ...),
314 // and be careful to not use pointers into potentially freed text[]!
315 static uintptr_t text_hole_make(char *, int); // at "p", make a 'size' byte hole
316 static char *yank_delete(char *, char *, int, int); // yank text[] into register then delete
317 static void show_help(void); // display some help info
318 static void rawmode(void); // set "raw" mode on tty
319 static void cookmode(void); // return to "cooked" mode on tty
320 // sleep for 'h' 1/100 seconds, return 1/0 if stdin is (ready for read)/(not ready)
321 static int mysleep(int);
322 static int readit(void); // read (maybe cursor) key from stdin
323 static int get_one_char(void); // read 1 char from stdin
324 static int file_size(const char *); // what is the byte size of "fn"
325 #if !ENABLE_FEATURE_VI_READONLY
326 #define file_insert(fn, p, update_ro_status) file_insert(fn, p)
328 // file_insert might reallocate text[]!
329 static int file_insert(const char *, char *, int);
330 static int file_write(char *, char *, char *);
331 #if !ENABLE_FEATURE_VI_OPTIMIZE_CURSOR
332 #define place_cursor(a, b, optimize) place_cursor(a, b)
334 static void place_cursor(int, int, int);
335 static void screen_erase(void);
336 static void clear_to_eol(void);
337 static void clear_to_eos(void);
338 static void go_bottom_and_clear_to_eol(void);
339 static void standout_start(void); // send "start reverse video" sequence
340 static void standout_end(void); // send "end reverse video" sequence
341 static void flash(int); // flash the terminal screen
342 static void show_status_line(void); // put a message on the bottom line
343 static void status_line(const char *, ...); // print to status buf
344 static void status_line_bold(const char *, ...);
345 static void not_implemented(const char *); // display "Not implemented" message
346 static int format_edit_status(void); // format file status on status line
347 static void redraw(int); // force a full screen refresh
348 static char* format_line(char* /*, int*/);
349 static void refresh(int); // update the terminal from screen[]
351 static void Indicate_Error(void); // use flash or beep to indicate error
352 #define indicate_error(c) Indicate_Error()
353 static void Hit_Return(void);
355 #if ENABLE_FEATURE_VI_SEARCH
356 static char *char_search(char *, const char *, int, int); // search for pattern starting at p
357 static int mycmp(const char *, const char *, int); // string cmp based in "ignorecase"
359 #if ENABLE_FEATURE_VI_COLON
360 static char *get_one_address(char *, int *); // get colon addr, if present
361 static char *get_address(char *, int *, int *); // get two colon addrs, if present
362 static void colon(char *); // execute the "colon" mode cmds
364 #if ENABLE_FEATURE_VI_USE_SIGNALS
365 static void winch_sig(int); // catch window size changes
366 static void suspend_sig(int); // catch ctrl-Z
367 static void catch_sig(int); // catch ctrl-C and alarm time-outs
369 #if ENABLE_FEATURE_VI_DOT_CMD
370 static void start_new_cmd_q(char); // new queue for command
371 static void end_cmd_q(void); // stop saving input chars
373 #define end_cmd_q() ((void)0)
375 #if ENABLE_FEATURE_VI_SETOPTS
376 static void showmatching(char *); // show the matching pair () [] {}
378 #if ENABLE_FEATURE_VI_YANKMARK || (ENABLE_FEATURE_VI_COLON && ENABLE_FEATURE_VI_SEARCH) || ENABLE_FEATURE_VI_CRASHME
379 // might reallocate text[]! use p += string_insert(p, ...),
380 // and be careful to not use pointers into potentially freed text[]!
381 static uintptr_t string_insert(char *, const char *); // insert the string at 'p'
383 #if ENABLE_FEATURE_VI_YANKMARK
384 static char *text_yank(char *, char *, int); // save copy of "p" into a register
385 static char what_reg(void); // what is letter of current YDreg
386 static void check_context(char); // remember context for '' command
388 #if ENABLE_FEATURE_VI_CRASHME
389 static void crash_dummy();
390 static void crash_test();
391 static int crashme = 0;
395 static void write1(const char *out)
400 int vi_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
401 int vi_main(int argc, char **argv)
407 #if ENABLE_FEATURE_VI_USE_SIGNALS || ENABLE_FEATURE_VI_CRASHME
410 #if ENABLE_FEATURE_VI_CRASHME
411 srand((long) my_pid);
413 #ifdef NO_SUCH_APPLET_YET
414 /* If we aren't "vi", we are "view" */
415 if (ENABLE_FEATURE_VI_READONLY && applet_name[2]) {
416 SET_READONLY_MODE(readonly_mode);
420 vi_setops = VI_AUTOINDENT | VI_SHOWMATCH | VI_IGNORECASE;
421 // 1- process $HOME/.exrc file (not inplemented yet)
422 // 2- process EXINIT variable from environment
423 // 3- process command line args
424 #if ENABLE_FEATURE_VI_COLON
426 char *p = getenv("EXINIT");
428 initial_cmds[0] = xstrndup(p, MAX_INPUT_LEN);
431 while ((c = getopt(argc, argv, "hCRH" IF_FEATURE_VI_COLON("c:"))) != -1) {
433 #if ENABLE_FEATURE_VI_CRASHME
438 #if ENABLE_FEATURE_VI_READONLY
439 case 'R': // Read-only flag
440 SET_READONLY_MODE(readonly_mode);
443 #if ENABLE_FEATURE_VI_COLON
444 case 'c': // cmd line vi command
446 initial_cmds[initial_cmds[0] != 0] = xstrndup(optarg, MAX_INPUT_LEN);
458 // The argv array can be used by the ":next" and ":rewind" commands
460 fn_start = optind; // remember first file name for :next and :rew
463 //----- This is the main file handling loop --------------
465 edit_file(argv[optind]); /* param might be NULL */
466 if (++optind >= argc)
469 //-----------------------------------------------------------
474 /* read text from file or create an empty buf */
475 /* will also update current_filename */
476 static int init_text_buffer(char *fn)
479 int size = file_size(fn); // file size. -1 means does not exist.
481 /* allocate/reallocate text buffer */
483 text_size = size + 10240;
484 screenbegin = dot = end = text = xzalloc(text_size);
486 if (fn != current_filename) {
487 free(current_filename);
488 current_filename = xstrdup(fn);
491 // file dont exist. Start empty buf with dummy line
492 char_insert(text, '\n');
495 rc = file_insert(fn, text, 1);
498 last_file_modified = -1;
499 #if ENABLE_FEATURE_VI_YANKMARK
500 /* init the marks. */
501 memset(mark, 0, sizeof(mark));
506 #if ENABLE_FEATURE_VI_WIN_RESIZE
507 static void query_screen_dimensions(void)
509 # if ENABLE_FEATURE_VI_ASK_TERMINAL
510 if (!G.get_rowcol_error)
513 get_terminal_width_height(STDIN_FILENO, &columns, &rows);
514 if (rows > MAX_SCR_ROWS)
516 if (columns > MAX_SCR_COLS)
517 columns = MAX_SCR_COLS;
520 # define query_screen_dimensions() ((void)0)
523 static void edit_file(char *fn)
525 #if ENABLE_FEATURE_VI_YANKMARK
526 #define cur_line edit_file__cur_line
530 #if ENABLE_FEATURE_VI_USE_SIGNALS
534 editing = 1; // 0 = exit, 1 = one file, 2 = multiple files
539 query_screen_dimensions();
540 #if ENABLE_FEATURE_VI_ASK_TERMINAL
541 if (G.get_rowcol_error /* TODO? && no input on stdin */) {
543 write1("\033[999;999H" "\033[6n");
545 k = read_key(STDIN_FILENO, readbuffer, /*timeout_ms:*/ 100);
546 if ((int32_t)k == KEYCODE_CURSOR_POS) {
547 uint32_t rc = (k >> 32);
548 columns = (rc & 0x7fff);
549 rows = ((rc >> 16) & 0x7fff);
551 query_screen_dimensions();
554 new_screen(rows, columns); // get memory for virtual screen
555 init_text_buffer(fn);
557 #if ENABLE_FEATURE_VI_YANKMARK
558 YDreg = 26; // default Yank/Delete reg
559 Ureg = 27; // hold orig line for "U" cmd
560 mark[26] = mark[27] = text; // init "previous context"
563 last_forward_char = last_input_char = '\0';
567 #if ENABLE_FEATURE_VI_USE_SIGNALS
568 signal(SIGINT, catch_sig);
569 signal(SIGWINCH, winch_sig);
570 signal(SIGTSTP, suspend_sig);
571 sig = sigsetjmp(restart, 1);
573 screenbegin = dot = text;
577 cmd_mode = 0; // 0=command 1=insert 2='R'eplace
580 offset = 0; // no horizontal offset
582 #if ENABLE_FEATURE_VI_DOT_CMD
584 ioq = ioq_start = NULL;
589 #if ENABLE_FEATURE_VI_COLON
594 while ((p = initial_cmds[n]) != NULL) {
604 free(initial_cmds[n]);
605 initial_cmds[n] = NULL;
610 redraw(FALSE); // dont force every col re-draw
611 //------This is the main Vi cmd handling loop -----------------------
612 while (editing > 0) {
613 #if ENABLE_FEATURE_VI_CRASHME
615 if ((end - text) > 1) {
616 crash_dummy(); // generate a random command
619 string_insert(text, "\n\n##### Ran out of text to work on. #####\n\n"); // insert the string
625 last_input_char = c = get_one_char(); // get a cmd from user
626 #if ENABLE_FEATURE_VI_YANKMARK
627 // save a copy of the current line- for the 'U" command
628 if (begin_line(dot) != cur_line) {
629 cur_line = begin_line(dot);
630 text_yank(begin_line(dot), end_line(dot), Ureg);
633 #if ENABLE_FEATURE_VI_DOT_CMD
634 // These are commands that change text[].
635 // Remember the input for the "." command
636 if (!adding2q && ioq_start == NULL
637 && cmd_mode == 0 // command mode
638 && c > '\0' // exclude NUL and non-ASCII chars
639 && c < 0x7f // (Unicode and such)
640 && strchr(modifying_cmds, c)
645 do_cmd(c); // execute the user command
647 // poll to see if there is input already waiting. if we are
648 // not able to display output fast enough to keep up, skip
649 // the display update until we catch up with input.
650 if (!readbuffer[0] && mysleep(0) == 0) {
651 // no input pending - so update output
655 #if ENABLE_FEATURE_VI_CRASHME
657 crash_test(); // test editor variables
660 //-------------------------------------------------------------------
662 go_bottom_and_clear_to_eol();
667 //----- The Colon commands -------------------------------------
668 #if ENABLE_FEATURE_VI_COLON
669 static char *get_one_address(char *p, int *addr) // get colon addr, if present
673 IF_FEATURE_VI_YANKMARK(char c;)
674 IF_FEATURE_VI_SEARCH(char *pat;)
676 *addr = -1; // assume no addr
677 if (*p == '.') { // the current line
680 *addr = count_lines(text, q);
682 #if ENABLE_FEATURE_VI_YANKMARK
683 else if (*p == '\'') { // is this a mark addr
687 if (c >= 'a' && c <= 'z') {
690 q = mark[(unsigned char) c];
691 if (q != NULL) { // is mark valid
692 *addr = count_lines(text, q);
697 #if ENABLE_FEATURE_VI_SEARCH
698 else if (*p == '/') { // a search pattern
699 q = strchrnul(++p, '/');
700 pat = xstrndup(p, q - p); // save copy of pattern
704 q = char_search(dot, pat, FORWARD, FULL);
706 *addr = count_lines(text, q);
711 else if (*p == '$') { // the last line in file
713 q = begin_line(end - 1);
714 *addr = count_lines(text, q);
715 } else if (isdigit(*p)) { // specific line number
716 sscanf(p, "%d%n", addr, &st);
719 // unrecognized address - assume -1
725 static char *get_address(char *p, int *b, int *e) // get two colon addrs, if present
727 //----- get the address' i.e., 1,3 'a,'b -----
728 // get FIRST addr, if present
730 p++; // skip over leading spaces
731 if (*p == '%') { // alias for 1,$
734 *e = count_lines(text, end-1);
737 p = get_one_address(p, b);
740 if (*p == ',') { // is there a address separator
744 // get SECOND addr, if present
745 p = get_one_address(p, e);
749 p++; // skip over trailing spaces
753 #if ENABLE_FEATURE_VI_SET && ENABLE_FEATURE_VI_SETOPTS
754 static void setops(const char *args, const char *opname, int flg_no,
755 const char *short_opname, int opt)
757 const char *a = args + flg_no;
758 int l = strlen(opname) - 1; /* opname have + ' ' */
760 // maybe strncmp? we had tons of erroneous strncasecmp's...
761 if (strncasecmp(a, opname, l) == 0
762 || strncasecmp(a, short_opname, 2) == 0
772 // buf must be no longer than MAX_INPUT_LEN!
773 static void colon(char *buf)
775 char c, *orig_buf, *buf1, *q, *r;
776 char *fn, cmd[MAX_INPUT_LEN], args[MAX_INPUT_LEN];
777 int i, l, li, ch, b, e;
778 int useforce, forced = FALSE;
780 // :3154 // if (-e line 3154) goto it else stay put
781 // :4,33w! foo // write a portion of buffer to file "foo"
782 // :w // write all of buffer to current file
784 // :q! // quit- dont care about modified file
785 // :'a,'z!sort -u // filter block through sort
786 // :'f // goto mark "f"
787 // :'fl // list literal the mark "f" line
788 // :.r bar // read file "bar" into buffer before dot
789 // :/123/,/abc/d // delete lines from "123" line to "abc" line
790 // :/xyz/ // goto the "xyz" line
791 // :s/find/replace/ // substitute pattern "find" with "replace"
792 // :!<cmd> // run <cmd> then return
798 buf++; // move past the ':'
802 q = text; // assume 1,$ for the range
804 li = count_lines(text, end - 1);
805 fn = current_filename;
807 // look for optional address(es) :. :1 :1,9 :'q,'a :%
808 buf = get_address(buf, &b, &e);
810 // remember orig command line
813 // get the COMMAND into cmd[]
815 while (*buf != '\0') {
822 while (isblank(*buf))
826 buf1 = last_char_is(cmd, '!');
829 *buf1 = '\0'; // get rid of !
832 // if there is only one addr, then the addr
833 // is the line number of the single line the
834 // user wants. So, reset the end
835 // pointer to point at end of the "b" line
836 q = find_line(b); // what line is #b
841 // we were given two addrs. change the
842 // end pointer to the addr given by user.
843 r = find_line(e); // what line is #e
847 // ------------ now look for the command ------------
849 if (i == 0) { // :123CR goto line #123
851 dot = find_line(b); // what line is #b
855 #if ENABLE_FEATURE_ALLOW_EXEC
856 else if (cmd[0] == '!') { // run a cmd
858 // :!ls run the <cmd>
859 go_bottom_and_clear_to_eol();
861 retcode = system(orig_buf + 1); // run the cmd
863 printf("\nshell returned %i\n\n", retcode);
865 Hit_Return(); // let user see results
868 else if (cmd[0] == '=' && !cmd[1]) { // where is the address
869 if (b < 0) { // no addr given- use defaults
870 b = e = count_lines(text, dot);
872 status_line("%d", b);
873 } else if (strncmp(cmd, "delete", i) == 0) { // delete lines
874 if (b < 0) { // no addr given- use defaults
875 q = begin_line(dot); // assume .,. for the range
878 dot = yank_delete(q, r, 1, YANKDEL); // save, then delete lines
880 } else if (strncmp(cmd, "edit", i) == 0) { // Edit a file
881 // don't edit, if the current file has been modified
882 if (file_modified && !useforce) {
883 status_line_bold("No write since last change (:edit! overrides)");
887 // the user supplied a file name
889 } else if (current_filename && current_filename[0]) {
890 // no user supplied name- use the current filename
891 // fn = current_filename; was set by default
893 // no user file name, no current name- punt
894 status_line_bold("No current filename");
898 if (init_text_buffer(fn) < 0)
901 #if ENABLE_FEATURE_VI_YANKMARK
902 if (Ureg >= 0 && Ureg < 28 && reg[Ureg] != 0) {
903 free(reg[Ureg]); // free orig line reg- for 'U'
906 if (YDreg >= 0 && YDreg < 28 && reg[YDreg] != 0) {
907 free(reg[YDreg]); // free default yank/delete register
911 // how many lines in text[]?
912 li = count_lines(text, end - 1);
913 status_line("\"%s\"%s"
914 IF_FEATURE_VI_READONLY("%s")
915 " %dL, %dC", current_filename,
916 (file_size(fn) < 0 ? " [New file]" : ""),
917 IF_FEATURE_VI_READONLY(
918 ((readonly_mode) ? " [Readonly]" : ""),
921 } else if (strncmp(cmd, "file", i) == 0) { // what File is this
922 if (b != -1 || e != -1) {
923 status_line_bold("No address allowed on this command");
927 // user wants a new filename
928 free(current_filename);
929 current_filename = xstrdup(args);
931 // user wants file status info
932 last_status_cksum = 0; // force status update
934 } else if (strncmp(cmd, "features", i) == 0) { // what features are available
935 // print out values of all features
936 go_bottom_and_clear_to_eol();
941 } else if (strncmp(cmd, "list", i) == 0) { // literal print line
942 if (b < 0) { // no addr given- use defaults
943 q = begin_line(dot); // assume .,. for the range
946 go_bottom_and_clear_to_eol();
948 for (; q <= r; q++) {
952 c_is_no_print = (c & 0x80) && !Isprint(c);
959 } else if (c < ' ' || c == 127) {
971 } else if (strncmp(cmd, "quit", i) == 0 // quit
972 || strncmp(cmd, "next", i) == 0 // edit next file
976 // force end of argv list
983 // don't exit if the file been modified
985 status_line_bold("No write since last change (:%s! overrides)",
986 (*cmd == 'q' ? "quit" : "next"));
989 // are there other file to edit
990 n = save_argc - optind - 1;
991 if (*cmd == 'q' && n > 0) {
992 status_line_bold("%d more file(s) to edit", n);
995 if (*cmd == 'n' && n <= 0) {
996 status_line_bold("No more files to edit");
1000 } else if (strncmp(cmd, "read", i) == 0) { // read file into text[]
1003 status_line_bold("No filename given");
1006 if (b < 0) { // no addr given- use defaults
1007 q = begin_line(dot); // assume "dot"
1009 // read after current line- unless user said ":0r foo"
1012 { // dance around potentially-reallocated text[]
1013 uintptr_t ofs = q - text;
1014 ch = file_insert(fn, q, 0);
1018 goto ret; // nothing was inserted
1019 // how many lines in text[]?
1020 li = count_lines(q, q + ch - 1);
1021 status_line("\"%s\""
1022 IF_FEATURE_VI_READONLY("%s")
1024 IF_FEATURE_VI_READONLY((readonly_mode ? " [Readonly]" : ""),)
1027 // if the insert is before "dot" then we need to update
1030 /*file_modified++; - done by file_insert */
1032 } else if (strncmp(cmd, "rewind", i) == 0) { // rewind cmd line args
1033 if (file_modified && !useforce) {
1034 status_line_bold("No write since last change (:rewind! overrides)");
1036 // reset the filenames to edit
1037 optind = fn_start - 1;
1040 #if ENABLE_FEATURE_VI_SET
1041 } else if (strncmp(cmd, "set", i) == 0) { // set or clear features
1042 #if ENABLE_FEATURE_VI_SETOPTS
1045 i = 0; // offset into args
1046 // only blank is regarded as args delmiter. What about tab '\t' ?
1047 if (!args[0] || strcasecmp(args, "all") == 0) {
1048 // print out values of all options
1049 #if ENABLE_FEATURE_VI_SETOPTS
1056 autoindent ? "" : "no",
1057 err_method ? "" : "no",
1058 ignorecase ? "" : "no",
1059 showmatch ? "" : "no",
1065 #if ENABLE_FEATURE_VI_SETOPTS
1068 if (strncmp(argp, "no", 2) == 0)
1069 i = 2; // ":set noautoindent"
1070 setops(argp, "autoindent ", i, "ai", VI_AUTOINDENT);
1071 setops(argp, "flash " , i, "fl", VI_ERR_METHOD);
1072 setops(argp, "ignorecase ", i, "ic", VI_IGNORECASE);
1073 setops(argp, "showmatch " , i, "sm", VI_SHOWMATCH );
1074 if (strncmp(argp + i, "tabstop=", 8) == 0) {
1076 sscanf(argp + i+8, "%u", &t);
1077 if (t > 0 && t <= MAX_TABSTOP)
1080 argp = skip_non_whitespace(argp);
1081 argp = skip_whitespace(argp);
1083 #endif /* FEATURE_VI_SETOPTS */
1084 #endif /* FEATURE_VI_SET */
1085 #if ENABLE_FEATURE_VI_SEARCH
1086 } else if (cmd[0] == 's') { // substitute a pattern with a replacement pattern
1090 // F points to the "find" pattern
1091 // R points to the "replace" pattern
1092 // replace the cmd line delimiters "/" with NULLs
1093 gflag = 0; // global replace flag
1094 c = orig_buf[1]; // what is the delimiter
1095 F = orig_buf + 2; // start of "find"
1096 R = strchr(F, c); // middle delimiter
1099 *R++ = '\0'; // terminate "find"
1100 buf1 = strchr(R, c);
1103 *buf1++ = '\0'; // terminate "replace"
1104 if (*buf1 == 'g') { // :s/foo/bar/g
1106 gflag++; // turn on gflag
1109 if (b < 0) { // maybe :s/foo/bar/
1110 q = begin_line(dot); // start with cur line
1111 b = count_lines(text, q); // cur line number
1114 e = b; // maybe :.s/foo/bar/
1115 for (i = b; i <= e; i++) { // so, :20,23 s \0 find \0 replace \0
1116 ls = q; // orig line start
1118 buf1 = char_search(q, F, FORWARD, LIMITED); // search cur line only for "find"
1121 // we found the "find" pattern - delete it
1122 text_hole_delete(buf1, buf1 + strlen(F) - 1);
1123 // inset the "replace" patern
1124 bias = string_insert(buf1, R); // insert the string
1127 /*q += bias; - recalculated anyway */
1128 // check for "global" :s/foo/bar/g
1130 if ((buf1 + strlen(R)) < end_line(ls)) {
1131 q = buf1 + strlen(R);
1132 goto vc4; // don't let q move past cur line
1138 #endif /* FEATURE_VI_SEARCH */
1139 } else if (strncmp(cmd, "version", i) == 0) { // show software version
1140 status_line(BB_VER " " BB_BT);
1141 } else if (strncmp(cmd, "write", i) == 0 // write text to file
1142 || strncmp(cmd, "wq", i) == 0
1143 || strncmp(cmd, "wn", i) == 0
1144 || (cmd[0] == 'x' && !cmd[1])
1146 // is there a file name to write to?
1150 #if ENABLE_FEATURE_VI_READONLY
1151 if (readonly_mode && !useforce) {
1152 status_line_bold("\"%s\" File is read only", fn);
1156 // how many lines in text[]?
1157 li = count_lines(q, r);
1159 // see if file exists- if not, its just a new file request
1161 // if "fn" is not write-able, chmod u+w
1162 // sprintf(syscmd, "chmod u+w %s", fn);
1166 l = file_write(fn, q, r);
1167 if (useforce && forced) {
1169 // sprintf(syscmd, "chmod u-w %s", fn);
1175 status_line_bold("\"%s\" %s", fn, strerror(errno));
1177 status_line("\"%s\" %dL, %dC", fn, li, l);
1178 if (q == text && r == end - 1 && l == ch) {
1180 last_file_modified = -1;
1182 if ((cmd[0] == 'x' || cmd[1] == 'q' || cmd[1] == 'n'
1183 || cmd[0] == 'X' || cmd[1] == 'Q' || cmd[1] == 'N'
1190 #if ENABLE_FEATURE_VI_YANKMARK
1191 } else if (strncmp(cmd, "yank", i) == 0) { // yank lines
1192 if (b < 0) { // no addr given- use defaults
1193 q = begin_line(dot); // assume .,. for the range
1196 text_yank(q, r, YDreg);
1197 li = count_lines(q, r);
1198 status_line("Yank %d lines (%d chars) into [%c]",
1199 li, strlen(reg[YDreg]), what_reg());
1203 not_implemented(cmd);
1206 dot = bound_dot(dot); // make sure "dot" is valid
1208 #if ENABLE_FEATURE_VI_SEARCH
1210 status_line(":s expression missing delimiters");
1214 #endif /* FEATURE_VI_COLON */
1216 static void Hit_Return(void)
1221 write1("[Hit return to continue]");
1223 while ((c = get_one_char()) != '\n' && c != '\r')
1225 redraw(TRUE); // force redraw all
1228 static int next_tabstop(int col)
1230 return col + ((tabstop - 1) - (col % tabstop));
1233 //----- Synchronize the cursor to Dot --------------------------
1234 static NOINLINE void sync_cursor(char *d, int *row, int *col)
1236 char *beg_cur; // begin and end of "d" line
1240 beg_cur = begin_line(d); // first char of cur line
1242 if (beg_cur < screenbegin) {
1243 // "d" is before top line on screen
1244 // how many lines do we have to move
1245 cnt = count_lines(beg_cur, screenbegin);
1247 screenbegin = beg_cur;
1248 if (cnt > (rows - 1) / 2) {
1249 // we moved too many lines. put "dot" in middle of screen
1250 for (cnt = 0; cnt < (rows - 1) / 2; cnt++) {
1251 screenbegin = prev_line(screenbegin);
1255 char *end_scr; // begin and end of screen
1256 end_scr = end_screen(); // last char of screen
1257 if (beg_cur > end_scr) {
1258 // "d" is after bottom line on screen
1259 // how many lines do we have to move
1260 cnt = count_lines(end_scr, beg_cur);
1261 if (cnt > (rows - 1) / 2)
1262 goto sc1; // too many lines
1263 for (ro = 0; ro < cnt - 1; ro++) {
1264 // move screen begin the same amount
1265 screenbegin = next_line(screenbegin);
1266 // now, move the end of screen
1267 end_scr = next_line(end_scr);
1268 end_scr = end_line(end_scr);
1272 // "d" is on screen- find out which row
1274 for (ro = 0; ro < rows - 1; ro++) { // drive "ro" to correct row
1280 // find out what col "d" is on
1282 while (tp < d) { // drive "co" to correct column
1283 if (*tp == '\n') //vda || *tp == '\0')
1286 // handle tabs like real vi
1287 if (d == tp && cmd_mode) {
1290 co = next_tabstop(co);
1291 } else if ((unsigned char)*tp < ' ' || *tp == 0x7f) {
1292 co++; // display as ^X, use 2 columns
1298 // "co" is the column where "dot" is.
1299 // The screen has "columns" columns.
1300 // The currently displayed columns are 0+offset -- columns+ofset
1301 // |-------------------------------------------------------------|
1303 // offset | |------- columns ----------------|
1305 // If "co" is already in this range then we do not have to adjust offset
1306 // but, we do have to subtract the "offset" bias from "co".
1307 // If "co" is outside this range then we have to change "offset".
1308 // If the first char of a line is a tab the cursor will try to stay
1309 // in column 7, but we have to set offset to 0.
1311 if (co < 0 + offset) {
1314 if (co >= columns + offset) {
1315 offset = co - columns + 1;
1317 // if the first char of the line is a tab, and "dot" is sitting on it
1318 // force offset to 0.
1319 if (d == beg_cur && *d == '\t') {
1328 //----- Text Movement Routines ---------------------------------
1329 static char *begin_line(char *p) // return pointer to first char cur line
1332 p = memrchr(text, '\n', p - text);
1340 static char *end_line(char *p) // return pointer to NL of cur line
1343 p = memchr(p, '\n', end - p - 1);
1350 static char *dollar_line(char *p) // return pointer to just before NL line
1353 // Try to stay off of the Newline
1354 if (*p == '\n' && (p - begin_line(p)) > 0)
1359 static char *prev_line(char *p) // return pointer first char prev line
1361 p = begin_line(p); // goto begining of cur line
1362 if (p > text && p[-1] == '\n')
1363 p--; // step to prev line
1364 p = begin_line(p); // goto begining of prev line
1368 static char *next_line(char *p) // return pointer first char next line
1371 if (p < end - 1 && *p == '\n')
1372 p++; // step to next line
1376 //----- Text Information Routines ------------------------------
1377 static char *end_screen(void)
1382 // find new bottom line
1384 for (cnt = 0; cnt < rows - 2; cnt++)
1390 // count line from start to stop
1391 static int count_lines(char *start, char *stop)
1396 if (stop < start) { // start and stop are backwards- reverse them
1402 stop = end_line(stop);
1403 while (start <= stop && start <= end - 1) {
1404 start = end_line(start);
1412 static char *find_line(int li) // find begining of line #li
1416 for (q = text; li > 1; li--) {
1422 //----- Dot Movement Routines ----------------------------------
1423 static void dot_left(void)
1425 if (dot > text && dot[-1] != '\n')
1429 static void dot_right(void)
1431 if (dot < end - 1 && *dot != '\n')
1435 static void dot_begin(void)
1437 dot = begin_line(dot); // return pointer to first char cur line
1440 static void dot_end(void)
1442 dot = end_line(dot); // return pointer to last char cur line
1445 static char *move_to_col(char *p, int l)
1451 while (co < l && p < end) {
1452 if (*p == '\n') //vda || *p == '\0')
1455 co = next_tabstop(co);
1456 } else if (*p < ' ' || *p == 127) {
1457 co++; // display as ^X, use 2 columns
1465 static void dot_next(void)
1467 dot = next_line(dot);
1470 static void dot_prev(void)
1472 dot = prev_line(dot);
1475 static void dot_scroll(int cnt, int dir)
1479 for (; cnt > 0; cnt--) {
1482 // ctrl-Y scroll up one line
1483 screenbegin = prev_line(screenbegin);
1486 // ctrl-E scroll down one line
1487 screenbegin = next_line(screenbegin);
1490 // make sure "dot" stays on the screen so we dont scroll off
1491 if (dot < screenbegin)
1493 q = end_screen(); // find new bottom line
1495 dot = begin_line(q); // is dot is below bottom line?
1499 static void dot_skip_over_ws(void)
1502 while (isspace(*dot) && *dot != '\n' && dot < end - 1)
1506 static void dot_delete(void) // delete the char at 'dot'
1508 text_hole_delete(dot, dot);
1511 static char *bound_dot(char *p) // make sure text[0] <= P < "end"
1513 if (p >= end && end > text) {
1515 indicate_error('1');
1519 indicate_error('2');
1524 //----- Helper Utility Routines --------------------------------
1526 //----------------------------------------------------------------
1527 //----- Char Routines --------------------------------------------
1528 /* Chars that are part of a word-
1529 * 0123456789_ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz
1530 * Chars that are Not part of a word (stoppers)
1531 * !"#$%&'()*+,-./:;<=>?@[\]^`{|}~
1532 * Chars that are WhiteSpace
1533 * TAB NEWLINE VT FF RETURN SPACE
1534 * DO NOT COUNT NEWLINE AS WHITESPACE
1537 static char *new_screen(int ro, int co)
1542 screensize = ro * co + 8;
1543 screen = xmalloc(screensize);
1544 // initialize the new screen. assume this will be a empty file.
1546 // non-existent text[] lines start with a tilde (~).
1547 for (li = 1; li < ro - 1; li++) {
1548 screen[(li * co) + 0] = '~';
1553 #if ENABLE_FEATURE_VI_SEARCH
1554 static int mycmp(const char *s1, const char *s2, int len)
1556 if (ENABLE_FEATURE_VI_SETOPTS && ignorecase) {
1557 return strncasecmp(s1, s2, len);
1559 return strncmp(s1, s2, len);
1562 // search for pattern starting at p
1563 static char *char_search(char *p, const char *pat, int dir, int range)
1565 #ifndef REGEX_SEARCH
1570 if (dir == FORWARD) {
1571 stop = end - 1; // assume range is p - end-1
1572 if (range == LIMITED)
1573 stop = next_line(p); // range is to next line
1574 for (start = p; start < stop; start++) {
1575 if (mycmp(start, pat, len) == 0) {
1579 } else if (dir == BACK) {
1580 stop = text; // assume range is text - p
1581 if (range == LIMITED)
1582 stop = prev_line(p); // range is to prev line
1583 for (start = p - len; start >= stop; start--) {
1584 if (mycmp(start, pat, len) == 0) {
1589 // pattern not found
1591 #else /* REGEX_SEARCH */
1593 struct re_pattern_buffer preg;
1597 re_syntax_options = RE_SYNTAX_POSIX_EXTENDED;
1603 // assume a LIMITED forward search
1611 // count the number of chars to search over, forward or backward
1615 // RANGE could be negative if we are searching backwards
1618 q = re_compile_pattern(pat, strlen(pat), &preg);
1620 // The pattern was not compiled
1621 status_line_bold("bad search pattern: \"%s\": %s", pat, q);
1622 i = 0; // return p if pattern not compiled
1632 // search for the compiled pattern, preg, in p[]
1633 // range < 0- search backward
1634 // range > 0- search forward
1636 // re_search() < 0 not found or error
1637 // re_search() > 0 index of found pattern
1638 // struct pattern char int int int struct reg
1639 // re_search (*pattern_buffer, *string, size, start, range, *regs)
1640 i = re_search(&preg, q, size, 0, range, 0);
1643 i = 0; // return NULL if pattern not found
1646 if (dir == FORWARD) {
1652 #endif /* REGEX_SEARCH */
1654 #endif /* FEATURE_VI_SEARCH */
1656 static char *char_insert(char *p, char c) // insert the char c at 'p'
1658 if (c == 22) { // Is this an ctrl-V?
1659 p += stupid_insert(p, '^'); // use ^ to indicate literal next
1660 refresh(FALSE); // show the ^
1665 } else if (c == 27) { // Is this an ESC?
1668 end_cmd_q(); // stop adding to q
1669 last_status_cksum = 0; // force status update
1670 if ((p[-1] != '\n') && (dot > text)) {
1673 } else if (c == erase_char || c == 8 || c == 127) { // Is this a BS
1675 if ((p[-1] != '\n') && (dot>text)) {
1677 p = text_hole_delete(p, p); // shrink buffer 1 char
1680 // insert a char into text[]
1681 char *sp; // "save p"
1684 c = '\n'; // translate \r to \n
1685 sp = p; // remember addr of insert
1686 p += 1 + stupid_insert(p, c); // insert the char
1687 #if ENABLE_FEATURE_VI_SETOPTS
1688 if (showmatch && strchr(")]}", *sp) != NULL) {
1691 if (autoindent && c == '\n') { // auto indent the new line
1694 q = prev_line(p); // use prev line as template
1695 len = strspn(q, " \t"); // space or tab
1698 bias = text_hole_make(p, len);
1710 // might reallocate text[]! use p += stupid_insert(p, ...),
1711 // and be careful to not use pointers into potentially freed text[]!
1712 static uintptr_t stupid_insert(char *p, char c) // stupidly insert the char c at 'p'
1715 bias = text_hole_make(p, 1);
1718 //file_modified++; - done by text_hole_make()
1722 static int find_range(char **start, char **stop, char c)
1724 char *save_dot, *p, *q, *t;
1725 int cnt, multiline = 0;
1730 if (strchr("cdy><", c)) {
1731 // these cmds operate on whole lines
1732 p = q = begin_line(p);
1733 for (cnt = 1; cnt < cmdcnt; cnt++) {
1737 } else if (strchr("^%$0bBeEfth\b\177", c)) {
1738 // These cmds operate on char positions
1739 do_cmd(c); // execute movement cmd
1741 } else if (strchr("wW", c)) {
1742 do_cmd(c); // execute movement cmd
1743 // if we are at the next word's first char
1744 // step back one char
1745 // but check the possibilities when it is true
1746 if (dot > text && ((isspace(dot[-1]) && !isspace(dot[0]))
1747 || (ispunct(dot[-1]) && !ispunct(dot[0]))
1748 || (isalnum(dot[-1]) && !isalnum(dot[0]))))
1749 dot--; // move back off of next word
1750 if (dot > text && *dot == '\n')
1751 dot--; // stay off NL
1753 } else if (strchr("H-k{", c)) {
1754 // these operate on multi-lines backwards
1755 q = end_line(dot); // find NL
1756 do_cmd(c); // execute movement cmd
1759 } else if (strchr("L+j}\r\n", c)) {
1760 // these operate on multi-lines forwards
1761 p = begin_line(dot);
1762 do_cmd(c); // execute movement cmd
1763 dot_end(); // find NL
1766 // nothing -- this causes any other values of c to
1767 // represent the one-character range under the
1768 // cursor. this is correct for ' ' and 'l', but
1769 // perhaps no others.
1778 // backward char movements don't include start position
1779 if (q > p && strchr("^0bBh\b\177", c)) q--;
1782 for (t = p; t <= q; t++) {
1795 static int st_test(char *p, int type, int dir, char *tested)
1805 if (type == S_BEFORE_WS) {
1807 test = (!isspace(c) || c == '\n');
1809 if (type == S_TO_WS) {
1811 test = (!isspace(c) || c == '\n');
1813 if (type == S_OVER_WS) {
1817 if (type == S_END_PUNCT) {
1821 if (type == S_END_ALNUM) {
1823 test = (isalnum(c) || c == '_');
1829 static char *skip_thing(char *p, int linecnt, int dir, int type)
1833 while (st_test(p, type, dir, &c)) {
1834 // make sure we limit search to correct number of lines
1835 if (c == '\n' && --linecnt < 1)
1837 if (dir >= 0 && p >= end - 1)
1839 if (dir < 0 && p <= text)
1841 p += dir; // move to next char
1846 // find matching char of pair () [] {}
1847 static char *find_pair(char *p, const char c)
1854 dir = 1; // assume forward
1856 case '(': match = ')'; break;
1857 case '[': match = ']'; break;
1858 case '{': match = '}'; break;
1859 case ')': match = '('; dir = -1; break;
1860 case ']': match = '['; dir = -1; break;
1861 case '}': match = '{'; dir = -1; break;
1863 for (q = p + dir; text <= q && q < end; q += dir) {
1864 // look for match, count levels of pairs (( ))
1866 level++; // increase pair levels
1868 level--; // reduce pair level
1870 break; // found matching pair
1873 q = NULL; // indicate no match
1877 #if ENABLE_FEATURE_VI_SETOPTS
1878 // show the matching char of a pair, () [] {}
1879 static void showmatching(char *p)
1883 // we found half of a pair
1884 q = find_pair(p, *p); // get loc of matching char
1886 indicate_error('3'); // no matching char
1888 // "q" now points to matching pair
1889 save_dot = dot; // remember where we are
1890 dot = q; // go to new loc
1891 refresh(FALSE); // let the user see it
1892 mysleep(40); // give user some time
1893 dot = save_dot; // go back to old loc
1897 #endif /* FEATURE_VI_SETOPTS */
1899 // open a hole in text[]
1900 // might reallocate text[]! use p += text_hole_make(p, ...),
1901 // and be careful to not use pointers into potentially freed text[]!
1902 static uintptr_t text_hole_make(char *p, int size) // at "p", make a 'size' byte hole
1908 end += size; // adjust the new END
1909 if (end >= (text + text_size)) {
1911 text_size += end - (text + text_size) + 10240;
1912 new_text = xrealloc(text, text_size);
1913 bias = (new_text - text);
1914 screenbegin += bias;
1920 memmove(p + size, p, end - size - p);
1921 memset(p, ' ', size); // clear new hole
1926 // close a hole in text[]
1927 static char *text_hole_delete(char *p, char *q) // delete "p" through "q", inclusive
1932 // move forwards, from beginning
1936 if (q < p) { // they are backward- swap them
1940 hole_size = q - p + 1;
1942 if (src < text || src > end)
1944 if (dest < text || dest >= end)
1947 goto thd_atend; // just delete the end of the buffer
1948 memmove(dest, src, cnt);
1950 end = end - hole_size; // adjust the new END
1952 dest = end - 1; // make sure dest in below end-1
1954 dest = end = text; // keep pointers valid
1960 // copy text into register, then delete text.
1961 // if dist <= 0, do not include, or go past, a NewLine
1963 static char *yank_delete(char *start, char *stop, int dist, int yf)
1967 // make sure start <= stop
1969 // they are backwards, reverse them
1975 // we cannot cross NL boundaries
1979 // dont go past a NewLine
1980 for (; p + 1 <= stop; p++) {
1982 stop = p; // "stop" just before NewLine
1988 #if ENABLE_FEATURE_VI_YANKMARK
1989 text_yank(start, stop, YDreg);
1991 if (yf == YANKDEL) {
1992 p = text_hole_delete(start, stop);
1997 static void show_help(void)
1999 puts("These features are available:"
2000 #if ENABLE_FEATURE_VI_SEARCH
2001 "\n\tPattern searches with / and ?"
2003 #if ENABLE_FEATURE_VI_DOT_CMD
2004 "\n\tLast command repeat with \'.\'"
2006 #if ENABLE_FEATURE_VI_YANKMARK
2007 "\n\tLine marking with 'x"
2008 "\n\tNamed buffers with \"x"
2010 #if ENABLE_FEATURE_VI_READONLY
2011 "\n\tReadonly if vi is called as \"view\""
2012 "\n\tReadonly with -R command line arg"
2014 #if ENABLE_FEATURE_VI_SET
2015 "\n\tSome colon mode commands with \':\'"
2017 #if ENABLE_FEATURE_VI_SETOPTS
2018 "\n\tSettable options with \":set\""
2020 #if ENABLE_FEATURE_VI_USE_SIGNALS
2021 "\n\tSignal catching- ^C"
2022 "\n\tJob suspend and resume with ^Z"
2024 #if ENABLE_FEATURE_VI_WIN_RESIZE
2025 "\n\tAdapt to window re-sizes"
2030 #if ENABLE_FEATURE_VI_DOT_CMD
2031 static void start_new_cmd_q(char c)
2033 // get buffer for new cmd
2034 // if there is a current cmd count put it in the buffer first
2036 lmc_len = sprintf(last_modifying_cmd, "%d%c", cmdcnt, c);
2037 } else { // just save char c onto queue
2038 last_modifying_cmd[0] = c;
2044 static void end_cmd_q(void)
2046 #if ENABLE_FEATURE_VI_YANKMARK
2047 YDreg = 26; // go back to default Yank/Delete reg
2051 #endif /* FEATURE_VI_DOT_CMD */
2053 #if ENABLE_FEATURE_VI_YANKMARK \
2054 || (ENABLE_FEATURE_VI_COLON && ENABLE_FEATURE_VI_SEARCH) \
2055 || ENABLE_FEATURE_VI_CRASHME
2056 // might reallocate text[]! use p += string_insert(p, ...),
2057 // and be careful to not use pointers into potentially freed text[]!
2058 static uintptr_t string_insert(char *p, const char *s) // insert the string at 'p'
2064 bias = text_hole_make(p, i);
2067 #if ENABLE_FEATURE_VI_YANKMARK
2070 for (cnt = 0; *s != '\0'; s++) {
2074 status_line("Put %d lines (%d chars) from [%c]", cnt, i, what_reg());
2081 #if ENABLE_FEATURE_VI_YANKMARK
2082 static char *text_yank(char *p, char *q, int dest) // copy text into a register
2085 if (cnt < 0) { // they are backwards- reverse them
2089 free(reg[dest]); // if already a yank register, free it
2090 reg[dest] = xstrndup(p, cnt + 1);
2094 static char what_reg(void)
2098 c = 'D'; // default to D-reg
2099 if (0 <= YDreg && YDreg <= 25)
2100 c = 'a' + (char) YDreg;
2108 static void check_context(char cmd)
2110 // A context is defined to be "modifying text"
2111 // Any modifying command establishes a new context.
2113 if (dot < context_start || dot > context_end) {
2114 if (strchr(modifying_cmds, cmd) != NULL) {
2115 // we are trying to modify text[]- make this the current context
2116 mark[27] = mark[26]; // move cur to prev
2117 mark[26] = dot; // move local to cur
2118 context_start = prev_line(prev_line(dot));
2119 context_end = next_line(next_line(dot));
2120 //loiter= start_loiter= now;
2125 static char *swap_context(char *p) // goto new context for '' command make this the current context
2129 // the current context is in mark[26]
2130 // the previous context is in mark[27]
2131 // only swap context if other context is valid
2132 if (text <= mark[27] && mark[27] <= end - 1) {
2134 mark[27] = mark[26];
2136 p = mark[26]; // where we are going- previous context
2137 context_start = prev_line(prev_line(prev_line(p)));
2138 context_end = next_line(next_line(next_line(p)));
2142 #endif /* FEATURE_VI_YANKMARK */
2144 //----- Set terminal attributes --------------------------------
2145 static void rawmode(void)
2147 tcgetattr(0, &term_orig);
2148 term_vi = term_orig;
2149 term_vi.c_lflag &= (~ICANON & ~ECHO); // leave ISIG ON- allow intr's
2150 term_vi.c_iflag &= (~IXON & ~ICRNL);
2151 term_vi.c_oflag &= (~ONLCR);
2152 term_vi.c_cc[VMIN] = 1;
2153 term_vi.c_cc[VTIME] = 0;
2154 erase_char = term_vi.c_cc[VERASE];
2155 tcsetattr_stdin_TCSANOW(&term_vi);
2158 static void cookmode(void)
2161 tcsetattr_stdin_TCSANOW(&term_orig);
2164 #if ENABLE_FEATURE_VI_USE_SIGNALS
2165 //----- Come here when we get a window resize signal ---------
2166 static void winch_sig(int sig UNUSED_PARAM)
2168 int save_errno = errno;
2169 // FIXME: do it in main loop!!!
2170 signal(SIGWINCH, winch_sig);
2171 query_screen_dimensions();
2172 new_screen(rows, columns); // get memory for virtual screen
2173 redraw(TRUE); // re-draw the screen
2177 //----- Come here when we get a continue signal -------------------
2178 static void cont_sig(int sig UNUSED_PARAM)
2180 int save_errno = errno;
2181 rawmode(); // terminal to "raw"
2182 last_status_cksum = 0; // force status update
2183 redraw(TRUE); // re-draw the screen
2185 signal(SIGTSTP, suspend_sig);
2186 signal(SIGCONT, SIG_DFL);
2187 //kill(my_pid, SIGCONT); // huh? why? we are already "continued"...
2191 //----- Come here when we get a Suspend signal -------------------
2192 static void suspend_sig(int sig UNUSED_PARAM)
2194 int save_errno = errno;
2195 go_bottom_and_clear_to_eol();
2196 cookmode(); // terminal to "cooked"
2198 signal(SIGCONT, cont_sig);
2199 signal(SIGTSTP, SIG_DFL);
2200 kill(my_pid, SIGTSTP);
2204 //----- Come here when we get a signal ---------------------------
2205 static void catch_sig(int sig)
2207 signal(SIGINT, catch_sig);
2208 siglongjmp(restart, sig);
2210 #endif /* FEATURE_VI_USE_SIGNALS */
2212 static int mysleep(int hund) // sleep for 'hund' 1/100 seconds or stdin ready
2214 struct pollfd pfd[1];
2216 pfd[0].fd = STDIN_FILENO;
2217 pfd[0].events = POLLIN;
2218 return safe_poll(pfd, 1, hund*10) > 0;
2221 //----- IO Routines --------------------------------------------
2222 static int readit(void) // read (maybe cursor) key from stdin
2227 c = read_key(STDIN_FILENO, readbuffer, /*timeout off:*/ -2);
2228 if (c == -1) { // EOF/error
2229 go_bottom_and_clear_to_eol();
2230 cookmode(); // terminal to "cooked"
2231 bb_error_msg_and_die("can't read user input");
2236 //----- IO Routines --------------------------------------------
2237 static int get_one_char(void)
2241 #if ENABLE_FEATURE_VI_DOT_CMD
2243 // we are not adding to the q.
2244 // but, we may be reading from a q
2246 // there is no current q, read from STDIN
2247 c = readit(); // get the users input
2249 // there is a queue to get chars from first
2250 // careful with correct sign expansion!
2251 c = (unsigned char)*ioq++;
2253 // the end of the q, read from STDIN
2255 ioq_start = ioq = 0;
2256 c = readit(); // get the users input
2260 // adding STDIN chars to q
2261 c = readit(); // get the users input
2262 if (lmc_len >= MAX_INPUT_LEN - 1) {
2263 status_line_bold("last_modifying_cmd overrun");
2265 // add new char to q
2266 last_modifying_cmd[lmc_len++] = c;
2270 c = readit(); // get the users input
2271 #endif /* FEATURE_VI_DOT_CMD */
2275 // Get input line (uses "status line" area)
2276 static char *get_input_line(const char *prompt)
2278 // char [MAX_INPUT_LEN]
2279 #define buf get_input_line__buf
2284 strcpy(buf, prompt);
2285 last_status_cksum = 0; // force status update
2286 go_bottom_and_clear_to_eol();
2287 write1(prompt); // write out the :, /, or ? prompt
2290 while (i < MAX_INPUT_LEN) {
2292 if (c == '\n' || c == '\r' || c == 27)
2293 break; // this is end of input
2294 if (c == erase_char || c == 8 || c == 127) {
2295 // user wants to erase prev char
2297 write1("\b \b"); // erase char on screen
2298 if (i <= 0) // user backs up before b-o-l, exit
2300 } else if (c > 0 && c < 256) { // exclude Unicode
2301 // (TODO: need to handle Unicode)
2312 static int file_size(const char *fn) // what is the byte size of "fn"
2318 if (fn && stat(fn, &st_buf) == 0) // see if file exists
2319 cnt = (int) st_buf.st_size;
2323 // might reallocate text[]!
2324 static int file_insert(const char *fn, char *p, int update_ro_status)
2328 struct stat statbuf;
2331 if (stat(fn, &statbuf) < 0) {
2332 status_line_bold("\"%s\" %s", fn, strerror(errno));
2335 if (!S_ISREG(statbuf.st_mode)) {
2336 // This is not a regular file
2337 status_line_bold("\"%s\" Not a regular file", fn);
2340 if (p < text || p > end) {
2341 status_line_bold("Trying to insert file outside of memory");
2345 // read file to buffer
2346 fd = open(fn, O_RDONLY);
2348 status_line_bold("\"%s\" %s", fn, strerror(errno));
2351 size = statbuf.st_size;
2352 p += text_hole_make(p, size);
2353 cnt = safe_read(fd, p, size);
2355 status_line_bold("\"%s\" %s", fn, strerror(errno));
2356 p = text_hole_delete(p, p + size - 1); // un-do buffer insert
2357 } else if (cnt < size) {
2358 // There was a partial read, shrink unused space text[]
2359 p = text_hole_delete(p + cnt, p + (size - cnt) - 1); // un-do buffer insert
2360 status_line_bold("can't read all of file \"%s\"", fn);
2366 #if ENABLE_FEATURE_VI_READONLY
2367 if (update_ro_status
2368 && ((access(fn, W_OK) < 0) ||
2369 /* root will always have access()
2370 * so we check fileperms too */
2371 !(statbuf.st_mode & (S_IWUSR | S_IWGRP | S_IWOTH))
2374 SET_READONLY_FILE(readonly_mode);
2380 static int file_write(char *fn, char *first, char *last)
2382 int fd, cnt, charcnt;
2385 status_line_bold("No current filename");
2389 /* By popular request we do not open file with O_TRUNC,
2390 * but instead ftruncate() it _after_ successful write.
2391 * Might reduce amount of data lost on power fail etc.
2393 fd = open(fn, (O_WRONLY | O_CREAT), 0666);
2396 cnt = last - first + 1;
2397 charcnt = full_write(fd, first, cnt);
2398 ftruncate(fd, charcnt);
2399 if (charcnt == cnt) {
2401 //file_modified = FALSE;
2409 //----- Terminal Drawing ---------------------------------------
2410 // The terminal is made up of 'rows' line of 'columns' columns.
2411 // classically this would be 24 x 80.
2412 // screen coordinates
2418 // 23,0 ... 23,79 <- status line
2420 //----- Move the cursor to row x col (count from 0, not 1) -------
2421 static void place_cursor(int row, int col, int optimize)
2423 char cm1[sizeof(CMrc) + sizeof(int)*3 * 2];
2424 #if ENABLE_FEATURE_VI_OPTIMIZE_CURSOR
2426 SZ_UP = sizeof(CMup),
2427 SZ_DN = sizeof(CMdown),
2428 SEQ_SIZE = SZ_UP > SZ_DN ? SZ_UP : SZ_DN,
2430 char cm2[SEQ_SIZE * 5 + 32]; // bigger than worst case size
2434 if (row < 0) row = 0;
2435 if (row >= rows) row = rows - 1;
2436 if (col < 0) col = 0;
2437 if (col >= columns) col = columns - 1;
2439 //----- 1. Try the standard terminal ESC sequence
2440 sprintf(cm1, CMrc, row + 1, col + 1);
2443 #if ENABLE_FEATURE_VI_OPTIMIZE_CURSOR
2444 if (optimize && col < 16) {
2446 int Rrow = last_row;
2447 int diff = Rrow - row;
2449 if (diff < -5 || diff > 5)
2452 //----- find the minimum # of chars to move cursor -------------
2453 //----- 2. Try moving with discreet chars (Newline, [back]space, ...)
2456 // move to the correct row
2457 while (row < Rrow) {
2458 // the cursor has to move up
2462 while (row > Rrow) {
2463 // the cursor has to move down
2464 strcat(cm2, CMdown);
2468 // now move to the correct column
2469 strcat(cm2, "\r"); // start at col 0
2470 // just send out orignal source char to get to correct place
2471 screenp = &screen[row * columns]; // start of screen line
2472 strncat(cm2, screenp, col);
2474 // pick the shortest cursor motion to send out
2475 if (strlen(cm2) < strlen(cm)) {
2481 #endif /* FEATURE_VI_OPTIMIZE_CURSOR */
2485 //----- Erase from cursor to end of line -----------------------
2486 static void clear_to_eol(void)
2488 write1(Ceol); // Erase from cursor to end of line
2491 static void go_bottom_and_clear_to_eol(void)
2493 place_cursor(rows - 1, 0, FALSE); // go to bottom of screen
2494 clear_to_eol(); // erase to end of line
2497 //----- Erase from cursor to end of screen -----------------------
2498 static void clear_to_eos(void)
2500 write1(Ceos); // Erase from cursor to end of screen
2503 //----- Start standout mode ------------------------------------
2504 static void standout_start(void) // send "start reverse video" sequence
2506 write1(SOs); // Start reverse video mode
2509 //----- End standout mode --------------------------------------
2510 static void standout_end(void) // send "end reverse video" sequence
2512 write1(SOn); // End reverse video mode
2515 //----- Flash the screen --------------------------------------
2516 static void flash(int h)
2518 standout_start(); // send "start reverse video" sequence
2521 standout_end(); // send "end reverse video" sequence
2525 static void Indicate_Error(void)
2527 #if ENABLE_FEATURE_VI_CRASHME
2529 return; // generate a random command
2532 write1(bell); // send out a bell character
2538 //----- Screen[] Routines --------------------------------------
2539 //----- Erase the Screen[] memory ------------------------------
2540 static void screen_erase(void)
2542 memset(screen, ' ', screensize); // clear new screen
2545 static int bufsum(char *buf, int count)
2548 char *e = buf + count;
2551 sum += (unsigned char) *buf++;
2555 //----- Draw the status line at bottom of the screen -------------
2556 static void show_status_line(void)
2558 int cnt = 0, cksum = 0;
2560 // either we already have an error or status message, or we
2562 if (!have_status_msg) {
2563 cnt = format_edit_status();
2564 cksum = bufsum(status_buffer, cnt);
2566 if (have_status_msg || ((cnt > 0 && last_status_cksum != cksum))) {
2567 last_status_cksum = cksum; // remember if we have seen this line
2568 go_bottom_and_clear_to_eol();
2569 write1(status_buffer);
2570 if (have_status_msg) {
2571 if (((int)strlen(status_buffer) - (have_status_msg - 1)) >
2573 have_status_msg = 0;
2576 have_status_msg = 0;
2578 place_cursor(crow, ccol, FALSE); // put cursor back in correct place
2583 //----- format the status buffer, the bottom line of screen ------
2584 // format status buffer, with STANDOUT mode
2585 static void status_line_bold(const char *format, ...)
2589 va_start(args, format);
2590 strcpy(status_buffer, SOs); // Terminal standout mode on
2591 vsprintf(status_buffer + sizeof(SOs)-1, format, args);
2592 strcat(status_buffer, SOn); // Terminal standout mode off
2595 have_status_msg = 1 + sizeof(SOs) + sizeof(SOn) - 2;
2598 // format status buffer
2599 static void status_line(const char *format, ...)
2603 va_start(args, format);
2604 vsprintf(status_buffer, format, args);
2607 have_status_msg = 1;
2610 // copy s to buf, convert unprintable
2611 static void print_literal(char *buf, const char *s)
2625 c_is_no_print = (c & 0x80) && !Isprint(c);
2626 if (c_is_no_print) {
2631 if (c < ' ' || c == 0x7f) {
2633 c |= '@'; /* 0x40 */
2639 if (c_is_no_print) {
2647 if (d - buf > MAX_INPUT_LEN - 10) // paranoia
2652 static void not_implemented(const char *s)
2654 char buf[MAX_INPUT_LEN];
2656 print_literal(buf, s);
2657 status_line_bold("\'%s\' is not implemented", buf);
2660 // show file status on status line
2661 static int format_edit_status(void)
2663 static const char cmd_mode_indicator[] ALIGN1 = "-IR-";
2665 #define tot format_edit_status__tot
2667 int cur, percent, ret, trunc_at;
2669 // file_modified is now a counter rather than a flag. this
2670 // helps reduce the amount of line counting we need to do.
2671 // (this will cause a mis-reporting of modified status
2672 // once every MAXINT editing operations.)
2674 // it would be nice to do a similar optimization here -- if
2675 // we haven't done a motion that could have changed which line
2676 // we're on, then we shouldn't have to do this count_lines()
2677 cur = count_lines(text, dot);
2679 // reduce counting -- the total lines can't have
2680 // changed if we haven't done any edits.
2681 if (file_modified != last_file_modified) {
2682 tot = cur + count_lines(dot, end - 1) - 1;
2683 last_file_modified = file_modified;
2686 // current line percent
2687 // ------------- ~~ ----------
2690 percent = (100 * cur) / tot;
2696 trunc_at = columns < STATUS_BUFFER_LEN-1 ?
2697 columns : STATUS_BUFFER_LEN-1;
2699 ret = snprintf(status_buffer, trunc_at+1,
2700 #if ENABLE_FEATURE_VI_READONLY
2701 "%c %s%s%s %d/%d %d%%",
2703 "%c %s%s %d/%d %d%%",
2705 cmd_mode_indicator[cmd_mode & 3],
2706 (current_filename != NULL ? current_filename : "No file"),
2707 #if ENABLE_FEATURE_VI_READONLY
2708 (readonly_mode ? " [Readonly]" : ""),
2710 (file_modified ? " [Modified]" : ""),
2713 if (ret >= 0 && ret < trunc_at)
2714 return ret; /* it all fit */
2716 return trunc_at; /* had to truncate */
2720 //----- Force refresh of all Lines -----------------------------
2721 static void redraw(int full_screen)
2723 place_cursor(0, 0, FALSE); // put cursor in correct place
2724 clear_to_eos(); // tell terminal to erase display
2725 screen_erase(); // erase the internal screen buffer
2726 last_status_cksum = 0; // force status update
2727 refresh(full_screen); // this will redraw the entire display
2731 //----- Format a text[] line into a buffer ---------------------
2732 static char* format_line(char *src /*, int li*/)
2737 char *dest = scr_out_buf; // [MAX_SCR_COLS + MAX_TABSTOP * 2]
2739 c = '~'; // char in col 0 in non-existent lines is '~'
2741 while (co < columns + tabstop) {
2742 // have we gone past the end?
2747 if ((c & 0x80) && !Isprint(c)) {
2750 if (c < ' ' || c == 0x7f) {
2754 while ((co % tabstop) != (tabstop - 1)) {
2762 c += '@'; // Ctrl-X -> 'X'
2767 // discard scrolled-off-to-the-left portion,
2768 // in tabstop-sized pieces
2769 if (ofs >= tabstop && co >= tabstop) {
2770 memmove(dest, dest + tabstop, co);
2777 // check "short line, gigantic offset" case
2780 // discard last scrolled off part
2783 // fill the rest with spaces
2785 memset(&dest[co], ' ', columns - co);
2789 //----- Refresh the changed screen lines -----------------------
2790 // Copy the source line from text[] into the buffer and note
2791 // if the current screenline is different from the new buffer.
2792 // If they differ then that line needs redrawing on the terminal.
2794 static void refresh(int full_screen)
2796 #define old_offset refresh__old_offset
2799 char *tp, *sp; // pointer into text[] and screen[]
2801 if (ENABLE_FEATURE_VI_WIN_RESIZE) {
2802 unsigned c = columns, r = rows;
2803 query_screen_dimensions();
2804 full_screen |= (c - columns) | (r - rows);
2806 sync_cursor(dot, &crow, &ccol); // where cursor will be (on "dot")
2807 tp = screenbegin; // index into text[] of top line
2809 // compare text[] to screen[] and mark screen[] lines that need updating
2810 for (li = 0; li < rows - 1; li++) {
2811 int cs, ce; // column start & end
2813 // format current text line
2814 out_buf = format_line(tp /*, li*/);
2816 // skip to the end of the current text[] line
2818 char *t = memchr(tp, '\n', end - tp);
2819 if (!t) t = end - 1;
2823 // see if there are any changes between vitual screen and out_buf
2824 changed = FALSE; // assume no change
2827 sp = &screen[li * columns]; // start of screen line
2829 // force re-draw of every single column from 0 - columns-1
2832 // compare newly formatted buffer with virtual screen
2833 // look forward for first difference between buf and screen
2834 for (; cs <= ce; cs++) {
2835 if (out_buf[cs] != sp[cs]) {
2836 changed = TRUE; // mark for redraw
2841 // look backward for last difference between out_buf and screen
2842 for (; ce >= cs; ce--) {
2843 if (out_buf[ce] != sp[ce]) {
2844 changed = TRUE; // mark for redraw
2848 // now, cs is index of first diff, and ce is index of last diff
2850 // if horz offset has changed, force a redraw
2851 if (offset != old_offset) {
2856 // make a sanity check of columns indexes
2858 if (ce > columns - 1) ce = columns - 1;
2859 if (cs > ce) { cs = 0; ce = columns - 1; }
2860 // is there a change between vitual screen and out_buf
2862 // copy changed part of buffer to virtual screen
2863 memcpy(sp+cs, out_buf+cs, ce-cs+1);
2865 // move cursor to column of first change
2866 //if (offset != old_offset) {
2867 // // place_cursor is still too stupid
2868 // // to handle offsets correctly
2869 // place_cursor(li, cs, FALSE);
2871 place_cursor(li, cs, TRUE);
2874 // write line out to terminal
2875 fwrite(&sp[cs], ce - cs + 1, 1, stdout);
2879 place_cursor(crow, ccol, TRUE);
2881 old_offset = offset;
2885 //---------------------------------------------------------------------
2886 //----- the Ascii Chart -----------------------------------------------
2888 // 00 nul 01 soh 02 stx 03 etx 04 eot 05 enq 06 ack 07 bel
2889 // 08 bs 09 ht 0a nl 0b vt 0c np 0d cr 0e so 0f si
2890 // 10 dle 11 dc1 12 dc2 13 dc3 14 dc4 15 nak 16 syn 17 etb
2891 // 18 can 19 em 1a sub 1b esc 1c fs 1d gs 1e rs 1f us
2892 // 20 sp 21 ! 22 " 23 # 24 $ 25 % 26 & 27 '
2893 // 28 ( 29 ) 2a * 2b + 2c , 2d - 2e . 2f /
2894 // 30 0 31 1 32 2 33 3 34 4 35 5 36 6 37 7
2895 // 38 8 39 9 3a : 3b ; 3c < 3d = 3e > 3f ?
2896 // 40 @ 41 A 42 B 43 C 44 D 45 E 46 F 47 G
2897 // 48 H 49 I 4a J 4b K 4c L 4d M 4e N 4f O
2898 // 50 P 51 Q 52 R 53 S 54 T 55 U 56 V 57 W
2899 // 58 X 59 Y 5a Z 5b [ 5c \ 5d ] 5e ^ 5f _
2900 // 60 ` 61 a 62 b 63 c 64 d 65 e 66 f 67 g
2901 // 68 h 69 i 6a j 6b k 6c l 6d m 6e n 6f o
2902 // 70 p 71 q 72 r 73 s 74 t 75 u 76 v 77 w
2903 // 78 x 79 y 7a z 7b { 7c | 7d } 7e ~ 7f del
2904 //---------------------------------------------------------------------
2906 //----- Execute a Vi Command -----------------------------------
2907 static void do_cmd(int c)
2909 const char *msg = msg; // for compiler
2910 char *p, *q, *save_dot;
2916 // c1 = c; // quiet the compiler
2917 // cnt = yf = 0; // quiet the compiler
2918 // msg = p = q = save_dot = buf; // quiet the compiler
2919 memset(buf, '\0', 12);
2923 /* if this is a cursor key, skip these checks */
2931 case KEYCODE_PAGEUP:
2932 case KEYCODE_PAGEDOWN:
2933 case KEYCODE_DELETE:
2937 if (cmd_mode == 2) {
2938 // flip-flop Insert/Replace mode
2939 if (c == KEYCODE_INSERT)
2941 // we are 'R'eplacing the current *dot with new char
2943 // don't Replace past E-o-l
2944 cmd_mode = 1; // convert to insert
2946 if (1 <= c || Isprint(c)) {
2948 dot = yank_delete(dot, dot, 0, YANKDEL); // delete char
2949 dot = char_insert(dot, c); // insert new char
2954 if (cmd_mode == 1) {
2955 // hitting "Insert" twice means "R" replace mode
2956 if (c == KEYCODE_INSERT) goto dc5;
2957 // insert the char c at "dot"
2958 if (1 <= c || Isprint(c)) {
2959 dot = char_insert(dot, c);
2974 #if ENABLE_FEATURE_VI_CRASHME
2975 case 0x14: // dc4 ctrl-T
2976 crashme = (crashme == 0) ? 1 : 0;
3005 //case 'u': // u- FIXME- there is no undo
3007 default: // unrecognized command
3010 not_implemented(buf);
3011 end_cmd_q(); // stop adding to q
3012 case 0x00: // nul- ignore
3014 case 2: // ctrl-B scroll up full screen
3015 case KEYCODE_PAGEUP: // Cursor Key Page Up
3016 dot_scroll(rows - 2, -1);
3018 case 4: // ctrl-D scroll down half screen
3019 dot_scroll((rows - 2) / 2, 1);
3021 case 5: // ctrl-E scroll down one line
3024 case 6: // ctrl-F scroll down full screen
3025 case KEYCODE_PAGEDOWN: // Cursor Key Page Down
3026 dot_scroll(rows - 2, 1);
3028 case 7: // ctrl-G show current status
3029 last_status_cksum = 0; // force status update
3031 case 'h': // h- move left
3032 case KEYCODE_LEFT: // cursor key Left
3033 case 8: // ctrl-H- move left (This may be ERASE char)
3034 case 0x7f: // DEL- move left (This may be ERASE char)
3040 case 10: // Newline ^J
3041 case 'j': // j- goto next line, same col
3042 case KEYCODE_DOWN: // cursor key Down
3046 dot_next(); // go to next B-o-l
3047 dot = move_to_col(dot, ccol + offset); // try stay in same col
3049 case 12: // ctrl-L force redraw whole screen
3050 case 18: // ctrl-R force redraw
3051 place_cursor(0, 0, FALSE); // put cursor in correct place
3052 clear_to_eos(); // tel terminal to erase display
3054 screen_erase(); // erase the internal screen buffer
3055 last_status_cksum = 0; // force status update
3056 refresh(TRUE); // this will redraw the entire display
3058 case 13: // Carriage Return ^M
3059 case '+': // +- goto next line
3066 case 21: // ctrl-U scroll up half screen
3067 dot_scroll((rows - 2) / 2, -1);
3069 case 25: // ctrl-Y scroll up one line
3075 cmd_mode = 0; // stop insrting
3077 last_status_cksum = 0; // force status update
3079 case ' ': // move right
3080 case 'l': // move right
3081 case KEYCODE_RIGHT: // Cursor Key Right
3087 #if ENABLE_FEATURE_VI_YANKMARK
3088 case '"': // "- name a register to use for Delete/Yank
3089 c1 = (get_one_char() | 0x20) - 'a'; // | 0x20 is tolower()
3090 if ((unsigned)c1 <= 25) { // a-z?
3096 case '\'': // '- goto a specific mark
3097 c1 = (get_one_char() | 0x20) - 'a';
3098 if ((unsigned)c1 <= 25) { // a-z?
3101 if (text <= q && q < end) {
3103 dot_begin(); // go to B-o-l
3106 } else if (c1 == '\'') { // goto previous context
3107 dot = swap_context(dot); // swap current and previous context
3108 dot_begin(); // go to B-o-l
3114 case 'm': // m- Mark a line
3115 // this is really stupid. If there are any inserts or deletes
3116 // between text[0] and dot then this mark will not point to the
3117 // correct location! It could be off by many lines!
3118 // Well..., at least its quick and dirty.
3119 c1 = (get_one_char() | 0x20) - 'a';
3120 if ((unsigned)c1 <= 25) { // a-z?
3121 // remember the line
3127 case 'P': // P- Put register before
3128 case 'p': // p- put register after
3131 status_line_bold("Nothing in register %c", what_reg());
3134 // are we putting whole lines or strings
3135 if (strchr(p, '\n') != NULL) {
3137 dot_begin(); // putting lines- Put above
3140 // are we putting after very last line?
3141 if (end_line(dot) == (end - 1)) {
3142 dot = end; // force dot to end of text[]
3144 dot_next(); // next line, then put before
3149 dot_right(); // move to right, can move to NL
3151 string_insert(dot, p); // insert the string
3152 end_cmd_q(); // stop adding to q
3154 case 'U': // U- Undo; replace current line with original version
3155 if (reg[Ureg] != 0) {
3156 p = begin_line(dot);
3158 p = text_hole_delete(p, q); // delete cur line
3159 p += string_insert(p, reg[Ureg]); // insert orig line
3164 #endif /* FEATURE_VI_YANKMARK */
3165 case '$': // $- goto end of line
3166 case KEYCODE_END: // Cursor Key End
3171 dot = end_line(dot);
3173 case '%': // %- find matching char of pair () [] {}
3174 for (q = dot; q < end && *q != '\n'; q++) {
3175 if (strchr("()[]{}", *q) != NULL) {
3176 // we found half of a pair
3177 p = find_pair(q, *q);
3189 case 'f': // f- forward to a user specified char
3190 last_forward_char = get_one_char(); // get the search char
3192 // dont separate these two commands. 'f' depends on ';'
3194 //**** fall through to ... ';'
3195 case ';': // ;- look at rest of line for last forward char
3199 if (last_forward_char == 0)
3202 while (q < end - 1 && *q != '\n' && *q != last_forward_char) {
3205 if (*q == last_forward_char)
3208 case ',': // repeat latest 'f' in opposite direction
3212 if (last_forward_char == 0)
3215 while (q >= text && *q != '\n' && *q != last_forward_char) {
3218 if (q >= text && *q == last_forward_char)
3222 case '-': // -- goto prev line
3229 #if ENABLE_FEATURE_VI_DOT_CMD
3230 case '.': // .- repeat the last modifying command
3231 // Stuff the last_modifying_cmd back into stdin
3232 // and let it be re-executed.
3234 last_modifying_cmd[lmc_len] = 0;
3235 ioq = ioq_start = xstrdup(last_modifying_cmd);
3239 #if ENABLE_FEATURE_VI_SEARCH
3240 case '?': // /- search for a pattern
3241 case '/': // /- search for a pattern
3244 q = get_input_line(buf); // get input line- use "status line"
3245 if (q[0] && !q[1]) {
3246 if (last_search_pattern[0])
3247 last_search_pattern[0] = c;
3248 goto dc3; // if no pat re-use old pat
3250 if (q[0]) { // strlen(q) > 1: new pat- save it and find
3251 // there is a new pat
3252 free(last_search_pattern);
3253 last_search_pattern = xstrdup(q);
3254 goto dc3; // now find the pattern
3256 // user changed mind and erased the "/"- do nothing
3258 case 'N': // N- backward search for last pattern
3262 dir = BACK; // assume BACKWARD search
3264 if (last_search_pattern[0] == '?') {
3268 goto dc4; // now search for pattern
3270 case 'n': // n- repeat search for last pattern
3271 // search rest of text[] starting at next char
3272 // if search fails return orignal "p" not the "p+1" address
3277 dir = FORWARD; // assume FORWARD search
3279 if (last_search_pattern[0] == '?') {
3284 q = char_search(p, last_search_pattern + 1, dir, FULL);
3286 dot = q; // good search, update "dot"
3290 // no pattern found between "dot" and "end"- continue at top
3295 q = char_search(p, last_search_pattern + 1, dir, FULL);
3296 if (q != NULL) { // found something
3297 dot = q; // found new pattern- goto it
3298 msg = "search hit BOTTOM, continuing at TOP";
3300 msg = "search hit TOP, continuing at BOTTOM";
3303 msg = "Pattern not found";
3307 status_line_bold("%s", msg);
3309 case '{': // {- move backward paragraph
3310 q = char_search(dot, "\n\n", BACK, FULL);
3311 if (q != NULL) { // found blank line
3312 dot = next_line(q); // move to next blank line
3315 case '}': // }- move forward paragraph
3316 q = char_search(dot, "\n\n", FORWARD, FULL);
3317 if (q != NULL) { // found blank line
3318 dot = next_line(q); // move to next blank line
3321 #endif /* FEATURE_VI_SEARCH */
3322 case '0': // 0- goto begining of line
3332 if (c == '0' && cmdcnt < 1) {
3333 dot_begin(); // this was a standalone zero
3335 cmdcnt = cmdcnt * 10 + (c - '0'); // this 0 is part of a number
3338 case ':': // :- the colon mode commands
3339 p = get_input_line(":"); // get input line- use "status line"
3340 #if ENABLE_FEATURE_VI_COLON
3341 colon(p); // execute the command
3344 p++; // move past the ':'
3348 if (strncmp(p, "quit", cnt) == 0
3349 || strncmp(p, "q!", cnt) == 0 // delete lines
3351 if (file_modified && p[1] != '!') {
3352 status_line_bold("No write since last change (:quit! overrides)");
3356 } else if (strncmp(p, "write", cnt) == 0
3357 || strncmp(p, "wq", cnt) == 0
3358 || strncmp(p, "wn", cnt) == 0
3359 || (p[0] == 'x' && !p[1])
3361 cnt = file_write(current_filename, text, end - 1);
3364 status_line_bold("Write error: %s", strerror(errno));
3367 last_file_modified = -1;
3368 status_line("\"%s\" %dL, %dC", current_filename, count_lines(text, end - 1), cnt);
3369 if (p[0] == 'x' || p[1] == 'q' || p[1] == 'n'
3370 || p[0] == 'X' || p[1] == 'Q' || p[1] == 'N'
3375 } else if (strncmp(p, "file", cnt) == 0) {
3376 last_status_cksum = 0; // force status update
3377 } else if (sscanf(p, "%d", &j) > 0) {
3378 dot = find_line(j); // go to line # j
3380 } else { // unrecognized cmd
3383 #endif /* !FEATURE_VI_COLON */
3385 case '<': // <- Left shift something
3386 case '>': // >- Right shift something
3387 cnt = count_lines(text, dot); // remember what line we are on
3388 c1 = get_one_char(); // get the type of thing to delete
3389 find_range(&p, &q, c1);
3390 yank_delete(p, q, 1, YANKONLY); // save copy before change
3393 i = count_lines(p, q); // # of lines we are shifting
3394 for ( ; i > 0; i--, p = next_line(p)) {
3396 // shift left- remove tab or 8 spaces
3398 // shrink buffer 1 char
3399 text_hole_delete(p, p);
3400 } else if (*p == ' ') {
3401 // we should be calculating columns, not just SPACE
3402 for (j = 0; *p == ' ' && j < tabstop; j++) {
3403 text_hole_delete(p, p);
3406 } else if (c == '>') {
3407 // shift right -- add tab or 8 spaces
3408 char_insert(p, '\t');
3411 dot = find_line(cnt); // what line were we on
3413 end_cmd_q(); // stop adding to q
3415 case 'A': // A- append at e-o-l
3416 dot_end(); // go to e-o-l
3417 //**** fall through to ... 'a'
3418 case 'a': // a- append after current char
3423 case 'B': // B- back a blank-delimited Word
3424 case 'E': // E- end of a blank-delimited word
3425 case 'W': // W- forward a blank-delimited word
3432 if (c == 'W' || isspace(dot[dir])) {
3433 dot = skip_thing(dot, 1, dir, S_TO_WS);
3434 dot = skip_thing(dot, 2, dir, S_OVER_WS);
3437 dot = skip_thing(dot, 1, dir, S_BEFORE_WS);
3439 case 'C': // C- Change to e-o-l
3440 case 'D': // D- delete to e-o-l
3442 dot = dollar_line(dot); // move to before NL
3443 // copy text into a register and delete
3444 dot = yank_delete(save_dot, dot, 0, YANKDEL); // delete to e-o-l
3446 goto dc_i; // start inserting
3447 #if ENABLE_FEATURE_VI_DOT_CMD
3449 end_cmd_q(); // stop adding to q
3452 case 'g': // 'gg' goto a line number (vim) (default: very first line)
3453 c1 = get_one_char();
3456 buf[1] = c1; // TODO: if Unicode?
3458 not_implemented(buf);
3464 case 'G': // G- goto to a line number (default= E-O-F)
3465 dot = end - 1; // assume E-O-F
3467 dot = find_line(cmdcnt); // what line is #cmdcnt
3471 case 'H': // H- goto top line on screen
3473 if (cmdcnt > (rows - 1)) {
3474 cmdcnt = (rows - 1);
3481 case 'I': // I- insert before first non-blank
3484 //**** fall through to ... 'i'
3485 case 'i': // i- insert before current char
3486 case KEYCODE_INSERT: // Cursor Key Insert
3488 cmd_mode = 1; // start insrting
3490 case 'J': // J- join current and next lines together
3494 dot_end(); // move to NL
3495 if (dot < end - 1) { // make sure not last char in text[]
3496 *dot++ = ' '; // replace NL with space
3498 while (isblank(*dot)) { // delete leading WS
3502 end_cmd_q(); // stop adding to q
3504 case 'L': // L- goto bottom line on screen
3506 if (cmdcnt > (rows - 1)) {
3507 cmdcnt = (rows - 1);
3515 case 'M': // M- goto middle line on screen
3517 for (cnt = 0; cnt < (rows-1) / 2; cnt++)
3518 dot = next_line(dot);
3520 case 'O': // O- open a empty line above
3522 p = begin_line(dot);
3523 if (p[-1] == '\n') {
3525 case 'o': // o- open a empty line below; Yes, I know it is in the middle of the "if (..."
3527 dot = char_insert(dot, '\n');
3530 dot = char_insert(dot, '\n'); // i\n ESC
3535 case 'R': // R- continuous Replace char
3539 case KEYCODE_DELETE:
3542 case 'X': // X- delete char before dot
3543 case 'x': // x- delete the current char
3544 case 's': // s- substitute the current char
3551 if (dot[dir] != '\n') {
3553 dot--; // delete prev char
3554 dot = yank_delete(dot, dot, 0, YANKDEL); // delete char
3557 goto dc_i; // start insrting
3558 end_cmd_q(); // stop adding to q
3560 case 'Z': // Z- if modified, {write}; exit
3561 // ZZ means to save file (if necessary), then exit
3562 c1 = get_one_char();
3567 if (file_modified) {
3568 if (ENABLE_FEATURE_VI_READONLY && readonly_mode) {
3569 status_line_bold("\"%s\" File is read only", current_filename);
3572 cnt = file_write(current_filename, text, end - 1);
3575 status_line_bold("Write error: %s", strerror(errno));
3576 } else if (cnt == (end - 1 - text + 1)) {
3583 case '^': // ^- move to first non-blank on line
3587 case 'b': // b- back a word
3588 case 'e': // e- end of word
3595 if ((dot + dir) < text || (dot + dir) > end - 1)
3598 if (isspace(*dot)) {
3599 dot = skip_thing(dot, (c == 'e') ? 2 : 1, dir, S_OVER_WS);
3601 if (isalnum(*dot) || *dot == '_') {
3602 dot = skip_thing(dot, 1, dir, S_END_ALNUM);
3603 } else if (ispunct(*dot)) {
3604 dot = skip_thing(dot, 1, dir, S_END_PUNCT);
3607 case 'c': // c- change something
3608 case 'd': // d- delete something
3609 #if ENABLE_FEATURE_VI_YANKMARK
3610 case 'y': // y- yank something
3611 case 'Y': // Y- Yank a line
3614 int yf, ml, whole = 0;
3615 yf = YANKDEL; // assume either "c" or "d"
3616 #if ENABLE_FEATURE_VI_YANKMARK
3617 if (c == 'y' || c == 'Y')
3622 c1 = get_one_char(); // get the type of thing to delete
3623 // determine range, and whether it spans lines
3624 ml = find_range(&p, &q, c1);
3625 if (c1 == 27) { // ESC- user changed mind and wants out
3626 c = c1 = 27; // Escape- do nothing
3627 } else if (strchr("wW", c1)) {
3629 // don't include trailing WS as part of word
3630 while (isblank(*q)) {
3631 if (q <= text || q[-1] == '\n')
3636 dot = yank_delete(p, q, ml, yf); // delete word
3637 } else if (strchr("^0bBeEft%$ lh\b\177", c1)) {
3638 // partial line copy text into a register and delete
3639 dot = yank_delete(p, q, ml, yf); // delete word
3640 } else if (strchr("cdykjHL+-{}\r\n", c1)) {
3641 // whole line copy text into a register and delete
3642 dot = yank_delete(p, q, ml, yf); // delete lines
3645 // could not recognize object
3646 c = c1 = 27; // error-
3652 dot = char_insert(dot, '\n');
3653 // on the last line of file don't move to prev line
3654 if (whole && dot != (end-1)) {
3657 } else if (c == 'd') {
3663 // if CHANGING, not deleting, start inserting after the delete
3665 strcpy(buf, "Change");
3666 goto dc_i; // start inserting
3669 strcpy(buf, "Delete");
3671 #if ENABLE_FEATURE_VI_YANKMARK
3672 if (c == 'y' || c == 'Y') {
3673 strcpy(buf, "Yank");
3677 for (cnt = 0; p <= q; p++) {
3681 status_line("%s %d lines (%d chars) using [%c]",
3682 buf, cnt, strlen(reg[YDreg]), what_reg());
3684 end_cmd_q(); // stop adding to q
3688 case 'k': // k- goto prev line, same col
3689 case KEYCODE_UP: // cursor key Up
3694 dot = move_to_col(dot, ccol + offset); // try stay in same col
3696 case 'r': // r- replace the current char with user input
3697 c1 = get_one_char(); // get the replacement char
3702 end_cmd_q(); // stop adding to q
3704 case 't': // t- move to char prior to next x
3705 last_forward_char = get_one_char();
3707 if (*dot == last_forward_char)
3709 last_forward_char = 0;
3711 case 'w': // w- forward a word
3715 if (isalnum(*dot) || *dot == '_') { // we are on ALNUM
3716 dot = skip_thing(dot, 1, FORWARD, S_END_ALNUM);
3717 } else if (ispunct(*dot)) { // we are on PUNCT
3718 dot = skip_thing(dot, 1, FORWARD, S_END_PUNCT);
3721 dot++; // move over word
3722 if (isspace(*dot)) {
3723 dot = skip_thing(dot, 2, FORWARD, S_OVER_WS);
3727 c1 = get_one_char(); // get the replacement char
3730 cnt = (rows - 2) / 2; // put dot at center
3732 cnt = rows - 2; // put dot at bottom
3733 screenbegin = begin_line(dot); // start dot at top
3734 dot_scroll(cnt, -1);
3736 case '|': // |- move to column "cmdcnt"
3737 dot = move_to_col(dot, cmdcnt - 1); // try to move to column
3739 case '~': // ~- flip the case of letters a-z -> A-Z
3743 if (islower(*dot)) {
3744 *dot = toupper(*dot);
3746 } else if (isupper(*dot)) {
3747 *dot = tolower(*dot);
3751 end_cmd_q(); // stop adding to q
3753 //----- The Cursor and Function Keys -----------------------------
3754 case KEYCODE_HOME: // Cursor Key Home
3757 // The Fn keys could point to do_macro which could translate them
3759 case KEYCODE_FUN1: // Function Key F1
3760 case KEYCODE_FUN2: // Function Key F2
3761 case KEYCODE_FUN3: // Function Key F3
3762 case KEYCODE_FUN4: // Function Key F4
3763 case KEYCODE_FUN5: // Function Key F5
3764 case KEYCODE_FUN6: // Function Key F6
3765 case KEYCODE_FUN7: // Function Key F7
3766 case KEYCODE_FUN8: // Function Key F8
3767 case KEYCODE_FUN9: // Function Key F9
3768 case KEYCODE_FUN10: // Function Key F10
3769 case KEYCODE_FUN11: // Function Key F11
3770 case KEYCODE_FUN12: // Function Key F12
3776 // if text[] just became empty, add back an empty line
3778 char_insert(text, '\n'); // start empty buf with dummy line
3781 // it is OK for dot to exactly equal to end, otherwise check dot validity
3783 dot = bound_dot(dot); // make sure "dot" is valid
3785 #if ENABLE_FEATURE_VI_YANKMARK
3786 check_context(c); // update the current context
3790 cmdcnt = 0; // cmd was not a number, reset cmdcnt
3791 cnt = dot - begin_line(dot);
3792 // Try to stay off of the Newline
3793 if (*dot == '\n' && cnt > 0 && cmd_mode == 0)
3797 /* NB! the CRASHME code is unmaintained, and doesn't currently build */
3798 #if ENABLE_FEATURE_VI_CRASHME
3799 static int totalcmds = 0;
3800 static int Mp = 85; // Movement command Probability
3801 static int Np = 90; // Non-movement command Probability
3802 static int Dp = 96; // Delete command Probability
3803 static int Ip = 97; // Insert command Probability
3804 static int Yp = 98; // Yank command Probability
3805 static int Pp = 99; // Put command Probability
3806 static int M = 0, N = 0, I = 0, D = 0, Y = 0, P = 0, U = 0;
3807 static const char chars[20] = "\t012345 abcdABCD-=.$";
3808 static const char *const words[20] = {
3809 "this", "is", "a", "test",
3810 "broadcast", "the", "emergency", "of",
3811 "system", "quick", "brown", "fox",
3812 "jumped", "over", "lazy", "dogs",
3813 "back", "January", "Febuary", "March"
3815 static const char *const lines[20] = {
3816 "You should have received a copy of the GNU General Public License\n",
3817 "char c, cm, *cmd, *cmd1;\n",
3818 "generate a command by percentages\n",
3819 "Numbers may be typed as a prefix to some commands.\n",
3820 "Quit, discarding changes!\n",
3821 "Forced write, if permission originally not valid.\n",
3822 "In general, any ex or ed command (such as substitute or delete).\n",
3823 "I have tickets available for the Blazers vs LA Clippers for Monday, Janurary 1 at 1:00pm.\n",
3824 "Please get w/ me and I will go over it with you.\n",
3825 "The following is a list of scheduled, committed changes.\n",
3826 "1. Launch Norton Antivirus (Start, Programs, Norton Antivirus)\n",
3827 "Reminder....Town Meeting in Central Perk cafe today at 3:00pm.\n",
3828 "Any question about transactions please contact Sterling Huxley.\n",
3829 "I will try to get back to you by Friday, December 31.\n",
3830 "This Change will be implemented on Friday.\n",
3831 "Let me know if you have problems accessing this;\n",
3832 "Sterling Huxley recently added you to the access list.\n",
3833 "Would you like to go to lunch?\n",
3834 "The last command will be automatically run.\n",
3835 "This is too much english for a computer geek.\n",
3837 static char *multilines[20] = {
3838 "You should have received a copy of the GNU General Public License\n",
3839 "char c, cm, *cmd, *cmd1;\n",
3840 "generate a command by percentages\n",
3841 "Numbers may be typed as a prefix to some commands.\n",
3842 "Quit, discarding changes!\n",
3843 "Forced write, if permission originally not valid.\n",
3844 "In general, any ex or ed command (such as substitute or delete).\n",
3845 "I have tickets available for the Blazers vs LA Clippers for Monday, Janurary 1 at 1:00pm.\n",
3846 "Please get w/ me and I will go over it with you.\n",
3847 "The following is a list of scheduled, committed changes.\n",
3848 "1. Launch Norton Antivirus (Start, Programs, Norton Antivirus)\n",
3849 "Reminder....Town Meeting in Central Perk cafe today at 3:00pm.\n",
3850 "Any question about transactions please contact Sterling Huxley.\n",
3851 "I will try to get back to you by Friday, December 31.\n",
3852 "This Change will be implemented on Friday.\n",
3853 "Let me know if you have problems accessing this;\n",
3854 "Sterling Huxley recently added you to the access list.\n",
3855 "Would you like to go to lunch?\n",
3856 "The last command will be automatically run.\n",
3857 "This is too much english for a computer geek.\n",
3860 // create a random command to execute
3861 static void crash_dummy()
3863 static int sleeptime; // how long to pause between commands
3864 char c, cm, *cmd, *cmd1;
3865 int i, cnt, thing, rbi, startrbi, percent;
3867 // "dot" movement commands
3868 cmd1 = " \n\r\002\004\005\006\025\0310^$-+wWeEbBhjklHL";
3870 // is there already a command running?
3871 if (readbuffer[0] > 0)
3874 readbuffer[0] = 'X';
3876 sleeptime = 0; // how long to pause between commands
3877 memset(readbuffer, '\0', sizeof(readbuffer));
3878 // generate a command by percentages
3879 percent = (int) lrand48() % 100; // get a number from 0-99
3880 if (percent < Mp) { // Movement commands
3881 // available commands
3884 } else if (percent < Np) { // non-movement commands
3885 cmd = "mz<>\'\""; // available commands
3887 } else if (percent < Dp) { // Delete commands
3888 cmd = "dx"; // available commands
3890 } else if (percent < Ip) { // Inset commands
3891 cmd = "iIaAsrJ"; // available commands
3893 } else if (percent < Yp) { // Yank commands
3894 cmd = "yY"; // available commands
3896 } else if (percent < Pp) { // Put commands
3897 cmd = "pP"; // available commands
3900 // We do not know how to handle this command, try again
3904 // randomly pick one of the available cmds from "cmd[]"
3905 i = (int) lrand48() % strlen(cmd);
3907 if (strchr(":\024", cm))
3908 goto cd0; // dont allow colon or ctrl-T commands
3909 readbuffer[rbi++] = cm; // put cmd into input buffer
3911 // now we have the command-
3912 // there are 1, 2, and multi char commands
3913 // find out which and generate the rest of command as necessary
3914 if (strchr("dmryz<>\'\"", cm)) { // 2-char commands
3915 cmd1 = " \n\r0$^-+wWeEbBhjklHL";
3916 if (cm == 'm' || cm == '\'' || cm == '\"') { // pick a reg[]
3917 cmd1 = "abcdefghijklmnopqrstuvwxyz";
3919 thing = (int) lrand48() % strlen(cmd1); // pick a movement command
3921 readbuffer[rbi++] = c; // add movement to input buffer
3923 if (strchr("iIaAsc", cm)) { // multi-char commands
3925 // change some thing
3926 thing = (int) lrand48() % strlen(cmd1); // pick a movement command
3928 readbuffer[rbi++] = c; // add movement to input buffer
3930 thing = (int) lrand48() % 4; // what thing to insert
3931 cnt = (int) lrand48() % 10; // how many to insert
3932 for (i = 0; i < cnt; i++) {
3933 if (thing == 0) { // insert chars
3934 readbuffer[rbi++] = chars[((int) lrand48() % strlen(chars))];
3935 } else if (thing == 1) { // insert words
3936 strcat(readbuffer, words[(int) lrand48() % 20]);
3937 strcat(readbuffer, " ");
3938 sleeptime = 0; // how fast to type
3939 } else if (thing == 2) { // insert lines
3940 strcat(readbuffer, lines[(int) lrand48() % 20]);
3941 sleeptime = 0; // how fast to type
3942 } else { // insert multi-lines
3943 strcat(readbuffer, multilines[(int) lrand48() % 20]);
3944 sleeptime = 0; // how fast to type
3947 strcat(readbuffer, "\033");
3949 readbuffer[0] = strlen(readbuffer + 1);
3953 mysleep(sleeptime); // sleep 1/100 sec
3956 // test to see if there are any errors
3957 static void crash_test()
3959 static time_t oldtim;
3966 strcat(msg, "end<text ");
3968 if (end > textend) {
3969 strcat(msg, "end>textend ");
3972 strcat(msg, "dot<text ");
3975 strcat(msg, "dot>end ");
3977 if (screenbegin < text) {
3978 strcat(msg, "screenbegin<text ");
3980 if (screenbegin > end - 1) {
3981 strcat(msg, "screenbegin>end-1 ");
3985 printf("\n\n%d: \'%c\' %s\n\n\n%s[Hit return to continue]%s",
3986 totalcmds, last_input_char, msg, SOs, SOn);
3988 while (safe_read(STDIN_FILENO, d, 1) > 0) {
3989 if (d[0] == '\n' || d[0] == '\r')
3994 if (tim >= (oldtim + 3)) {
3995 sprintf(status_buffer,
3996 "Tot=%d: M=%d N=%d I=%d D=%d Y=%d P=%d U=%d size=%d",
3997 totalcmds, M, N, I, D, Y, P, U, end - text + 1);