1 /* vi: set sw=4 ts=4: */
3 * tiny vi.c: A small 'vi' clone
4 * Copyright (C) 2000, 2001 Sterling Huxley <sterling@europa.com>
6 * Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
12 * $HOME/.exrc and ./.exrc
13 * add magic to search /foo.*bar
16 * if mark[] values were line numbers rather than pointers
17 * it would be easier to change the mark when add/delete lines
18 * More intelligence in refresh()
19 * ":r !cmd" and "!cmd" to filter text through an external command
20 * A true "undo" facility
21 * An "ex" line oriented mode- maybe using "cmdedit"
26 /* the CRASHME code is unmaintained, and doesn't currently build */
27 #define ENABLE_FEATURE_VI_CRASHME 0
30 #if ENABLE_LOCALE_SUPPORT
32 #if ENABLE_FEATURE_VI_8BIT
33 #define Isprint(c) isprint(c)
35 #define Isprint(c) (isprint(c) && (unsigned char)(c) < 0x7f)
40 /* 0x9b is Meta-ESC */
41 #if ENABLE_FEATURE_VI_8BIT
42 #define Isprint(c) ((unsigned char)(c) >= ' ' && (c) != 0x7f && (unsigned char)(c) != 0x9b)
44 #define Isprint(c) ((unsigned char)(c) >= ' ' && (unsigned char)(c) < 0x7f)
51 MAX_TABSTOP = 32, // sanity limit
52 // User input len. Need not be extra big.
53 // Lines in file being edited *can* be bigger than this.
55 // Sanity limits. We have only one buffer of this size.
56 MAX_SCR_COLS = CONFIG_FEATURE_VI_MAX_LEN,
57 MAX_SCR_ROWS = CONFIG_FEATURE_VI_MAX_LEN,
60 /* vt102 typical ESC sequence */
61 /* terminal standout start/normal ESC sequence */
62 static const char SOs[] ALIGN1 = "\033[7m";
63 static const char SOn[] ALIGN1 = "\033[0m";
64 /* terminal bell sequence */
65 static const char bell[] ALIGN1 = "\007";
66 /* Clear-end-of-line and Clear-end-of-screen ESC sequence */
67 static const char Ceol[] ALIGN1 = "\033[0K";
68 static const char Ceos[] ALIGN1 = "\033[0J";
69 /* Cursor motion arbitrary destination ESC sequence */
70 static const char CMrc[] ALIGN1 = "\033[%d;%dH";
71 /* Cursor motion up and down ESC sequence */
72 static const char CMup[] ALIGN1 = "\033[A";
73 static const char CMdown[] ALIGN1 = "\n";
75 #if ENABLE_FEATURE_VI_DOT_CMD || ENABLE_FEATURE_VI_YANKMARK
76 // cmds modifying text[]
77 // vda: removed "aAiIs" as they switch us into insert mode
78 // and remembering input for replay after them makes no sense
79 static const char modifying_cmds[] = "cCdDJoOpPrRxX<>~";
85 FORWARD = 1, // code depends on "1" for array index
86 BACK = -1, // code depends on "-1" for array index
87 LIMITED = 0, // how much of text[] in char_search
88 FULL = 1, // how much of text[] in char_search
90 S_BEFORE_WS = 1, // used in skip_thing() for moving "dot"
91 S_TO_WS = 2, // used in skip_thing() for moving "dot"
92 S_OVER_WS = 3, // used in skip_thing() for moving "dot"
93 S_END_PUNCT = 4, // used in skip_thing() for moving "dot"
94 S_END_ALNUM = 5, // used in skip_thing() for moving "dot"
98 /* vi.c expects chars to be unsigned. */
99 /* busybox build system provides that, but it's better */
100 /* to audit and fix the source */
103 /* many references - keep near the top of globals */
104 char *text, *end; // pointers to the user data in memory
105 char *dot; // where all the action takes place
106 int text_size; // size of the allocated buffer
110 #define VI_AUTOINDENT 1
111 #define VI_SHOWMATCH 2
112 #define VI_IGNORECASE 4
113 #define VI_ERR_METHOD 8
114 #define autoindent (vi_setops & VI_AUTOINDENT)
115 #define showmatch (vi_setops & VI_SHOWMATCH )
116 #define ignorecase (vi_setops & VI_IGNORECASE)
117 /* indicate error with beep or flash */
118 #define err_method (vi_setops & VI_ERR_METHOD)
120 #if ENABLE_FEATURE_VI_READONLY
121 smallint readonly_mode;
122 #define SET_READONLY_FILE(flags) ((flags) |= 0x01)
123 #define SET_READONLY_MODE(flags) ((flags) |= 0x02)
124 #define UNSET_READONLY_FILE(flags) ((flags) &= 0xfe)
126 #define SET_READONLY_FILE(flags) ((void)0)
127 #define SET_READONLY_MODE(flags) ((void)0)
128 #define UNSET_READONLY_FILE(flags) ((void)0)
131 smallint editing; // >0 while we are editing a file
132 // [code audit says "can be 0, 1 or 2 only"]
133 smallint cmd_mode; // 0=command 1=insert 2=replace
134 int file_modified; // buffer contents changed (counter, not flag!)
135 int last_file_modified; // = -1;
136 int fn_start; // index of first cmd line file name
137 int save_argc; // how many file names on cmd line
138 int cmdcnt; // repetition count
139 unsigned rows, columns; // the terminal screen is this size
140 int crow, ccol; // cursor is on Crow x Ccol
141 int offset; // chars scrolled off the screen to the left
142 int have_status_msg; // is default edit status needed?
143 // [don't make smallint!]
144 int last_status_cksum; // hash of current status line
145 char *current_filename;
146 char *screenbegin; // index into text[], of top line on the screen
147 char *screen; // pointer to the virtual screen buffer
148 int screensize; // and its size
150 int last_forward_char; // last char searched for with 'f' (int because of Unicode)
151 char erase_char; // the users erase character
152 char last_input_char; // last char read from user
154 smalluint chars_to_parse;
155 #if ENABLE_FEATURE_VI_DOT_CMD
156 smallint adding2q; // are we currently adding user input to q
157 int lmc_len; // length of last_modifying_cmd
158 char *ioq, *ioq_start; // pointer to string for get_one_char to "read"
160 #if ENABLE_FEATURE_VI_OPTIMIZE_CURSOR
161 int last_row; // where the cursor was last moved to
163 #if ENABLE_FEATURE_VI_USE_SIGNALS || ENABLE_FEATURE_VI_CRASHME
166 #if ENABLE_FEATURE_VI_SEARCH
167 char *last_search_pattern; // last pattern from a '/' or '?' search
171 #if ENABLE_FEATURE_VI_YANKMARK
172 char *edit_file__cur_line;
174 int refresh__old_offset;
175 int format_edit_status__tot;
177 /* a few references only */
178 #if ENABLE_FEATURE_VI_YANKMARK
179 int YDreg, Ureg; // default delete register and orig line for "U"
180 char *reg[28]; // named register a-z, "D", and "U" 0-25,26,27
181 char *mark[28]; // user marks points somewhere in text[]- a-z and previous context ''
182 char *context_start, *context_end;
184 #if ENABLE_FEATURE_VI_USE_SIGNALS
185 sigjmp_buf restart; // catch_sig()
187 struct termios term_orig, term_vi; // remember what the cooked mode was
188 #if ENABLE_FEATURE_VI_COLON
189 char *initial_cmds[3]; // currently 2 entries, NULL terminated
191 // Should be just enough to hold a key sequence,
192 // but CRASHME mode uses it as generated command buffer too
193 #if ENABLE_FEATURE_VI_CRASHME
194 char readbuffer[128];
196 char readbuffer[KEYCODE_BUFFER_SIZE];
198 #define STATUS_BUFFER_LEN 200
199 char status_buffer[STATUS_BUFFER_LEN]; // messages to the user
200 #if ENABLE_FEATURE_VI_DOT_CMD
201 char last_modifying_cmd[MAX_INPUT_LEN]; // last modifying cmd for "."
203 char get_input_line__buf[MAX_INPUT_LEN]; /* former static */
205 char scr_out_buf[MAX_SCR_COLS + MAX_TABSTOP * 2];
207 #define G (*ptr_to_globals)
208 #define text (G.text )
209 #define text_size (G.text_size )
214 #define vi_setops (G.vi_setops )
215 #define editing (G.editing )
216 #define cmd_mode (G.cmd_mode )
217 #define file_modified (G.file_modified )
218 #define last_file_modified (G.last_file_modified )
219 #define fn_start (G.fn_start )
220 #define save_argc (G.save_argc )
221 #define cmdcnt (G.cmdcnt )
222 #define rows (G.rows )
223 #define columns (G.columns )
224 #define crow (G.crow )
225 #define ccol (G.ccol )
226 #define offset (G.offset )
227 #define status_buffer (G.status_buffer )
228 #define have_status_msg (G.have_status_msg )
229 #define last_status_cksum (G.last_status_cksum )
230 #define current_filename (G.current_filename )
231 #define screen (G.screen )
232 #define screensize (G.screensize )
233 #define screenbegin (G.screenbegin )
234 #define tabstop (G.tabstop )
235 #define last_forward_char (G.last_forward_char )
236 #define erase_char (G.erase_char )
237 #define last_input_char (G.last_input_char )
238 #define chars_to_parse (G.chars_to_parse )
239 #if ENABLE_FEATURE_VI_READONLY
240 #define readonly_mode (G.readonly_mode )
242 #define readonly_mode 0
244 #define adding2q (G.adding2q )
245 #define lmc_len (G.lmc_len )
247 #define ioq_start (G.ioq_start )
248 #define last_row (G.last_row )
249 #define my_pid (G.my_pid )
250 #define last_search_pattern (G.last_search_pattern)
252 #define edit_file__cur_line (G.edit_file__cur_line)
253 #define refresh__old_offset (G.refresh__old_offset)
254 #define format_edit_status__tot (G.format_edit_status__tot)
256 #define YDreg (G.YDreg )
257 #define Ureg (G.Ureg )
258 #define mark (G.mark )
259 #define context_start (G.context_start )
260 #define context_end (G.context_end )
261 #define restart (G.restart )
262 #define term_orig (G.term_orig )
263 #define term_vi (G.term_vi )
264 #define initial_cmds (G.initial_cmds )
265 #define readbuffer (G.readbuffer )
266 #define scr_out_buf (G.scr_out_buf )
267 #define last_modifying_cmd (G.last_modifying_cmd )
268 #define get_input_line__buf (G.get_input_line__buf)
270 #define INIT_G() do { \
271 SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \
272 last_file_modified = -1; \
276 static int init_text_buffer(char *); // init from file or create new
277 static void edit_file(char *); // edit one file
278 static void do_cmd(int); // execute a command
279 static int next_tabstop(int);
280 static void sync_cursor(char *, int *, int *); // synchronize the screen cursor to dot
281 static char *begin_line(char *); // return pointer to cur line B-o-l
282 static char *end_line(char *); // return pointer to cur line E-o-l
283 static char *prev_line(char *); // return pointer to prev line B-o-l
284 static char *next_line(char *); // return pointer to next line B-o-l
285 static char *end_screen(void); // get pointer to last char on screen
286 static int count_lines(char *, char *); // count line from start to stop
287 static char *find_line(int); // find begining of line #li
288 static char *move_to_col(char *, int); // move "p" to column l
289 static void dot_left(void); // move dot left- dont leave line
290 static void dot_right(void); // move dot right- dont leave line
291 static void dot_begin(void); // move dot to B-o-l
292 static void dot_end(void); // move dot to E-o-l
293 static void dot_next(void); // move dot to next line B-o-l
294 static void dot_prev(void); // move dot to prev line B-o-l
295 static void dot_scroll(int, int); // move the screen up or down
296 static void dot_skip_over_ws(void); // move dot pat WS
297 static void dot_delete(void); // delete the char at 'dot'
298 static char *bound_dot(char *); // make sure text[0] <= P < "end"
299 static char *new_screen(int, int); // malloc virtual screen memory
300 static char *char_insert(char *, char); // insert the char c at 'p'
301 static char *stupid_insert(char *, char); // stupidly insert the char c at 'p'
302 static int find_range(char **, char **, char); // return pointers for an object
303 static int st_test(char *, int, int, char *); // helper for skip_thing()
304 static char *skip_thing(char *, int, int, int); // skip some object
305 static char *find_pair(char *, char); // find matching pair () [] {}
306 static char *text_hole_delete(char *, char *); // at "p", delete a 'size' byte hole
307 static char *text_hole_make(char *, int); // at "p", make a 'size' byte hole
308 static char *yank_delete(char *, char *, int, int); // yank text[] into register then delete
309 static void show_help(void); // display some help info
310 static void rawmode(void); // set "raw" mode on tty
311 static void cookmode(void); // return to "cooked" mode on tty
312 // sleep for 'h' 1/100 seconds, return 1/0 if stdin is (ready for read)/(not ready)
313 static int mysleep(int);
314 static int readit(void); // read (maybe cursor) key from stdin
315 static int get_one_char(void); // read 1 char from stdin
316 static int file_size(const char *); // what is the byte size of "fn"
317 #if ENABLE_FEATURE_VI_READONLY
318 static int file_insert(const char *, char *, int);
320 static int file_insert(const char *, char *);
322 static int file_write(char *, char *, char *);
323 #if !ENABLE_FEATURE_VI_OPTIMIZE_CURSOR
324 #define place_cursor(a, b, optimize) place_cursor(a, b)
326 static void place_cursor(int, int, int);
327 static void screen_erase(void);
328 static void clear_to_eol(void);
329 static void clear_to_eos(void);
330 static void go_bottom_and_clear_to_eol(void);
331 static void standout_start(void); // send "start reverse video" sequence
332 static void standout_end(void); // send "end reverse video" sequence
333 static void flash(int); // flash the terminal screen
334 static void show_status_line(void); // put a message on the bottom line
335 static void status_line(const char *, ...); // print to status buf
336 static void status_line_bold(const char *, ...);
337 static void not_implemented(const char *); // display "Not implemented" message
338 static int format_edit_status(void); // format file status on status line
339 static void redraw(int); // force a full screen refresh
340 static char* format_line(char* /*, int*/);
341 static void refresh(int); // update the terminal from screen[]
343 static void Indicate_Error(void); // use flash or beep to indicate error
344 #define indicate_error(c) Indicate_Error()
345 static void Hit_Return(void);
347 #if ENABLE_FEATURE_VI_SEARCH
348 static char *char_search(char *, const char *, int, int); // search for pattern starting at p
349 static int mycmp(const char *, const char *, int); // string cmp based in "ignorecase"
351 #if ENABLE_FEATURE_VI_COLON
352 static char *get_one_address(char *, int *); // get colon addr, if present
353 static char *get_address(char *, int *, int *); // get two colon addrs, if present
354 static void colon(char *); // execute the "colon" mode cmds
356 #if ENABLE_FEATURE_VI_USE_SIGNALS
357 static void winch_sig(int); // catch window size changes
358 static void suspend_sig(int); // catch ctrl-Z
359 static void catch_sig(int); // catch ctrl-C and alarm time-outs
361 #if ENABLE_FEATURE_VI_DOT_CMD
362 static void start_new_cmd_q(char); // new queue for command
363 static void end_cmd_q(void); // stop saving input chars
365 #define end_cmd_q() ((void)0)
367 #if ENABLE_FEATURE_VI_SETOPTS
368 static void showmatching(char *); // show the matching pair () [] {}
370 #if ENABLE_FEATURE_VI_YANKMARK || (ENABLE_FEATURE_VI_COLON && ENABLE_FEATURE_VI_SEARCH) || ENABLE_FEATURE_VI_CRASHME
371 static char *string_insert(char *, char *); // insert the string at 'p'
373 #if ENABLE_FEATURE_VI_YANKMARK
374 static char *text_yank(char *, char *, int); // save copy of "p" into a register
375 static char what_reg(void); // what is letter of current YDreg
376 static void check_context(char); // remember context for '' command
378 #if ENABLE_FEATURE_VI_CRASHME
379 static void crash_dummy();
380 static void crash_test();
381 static int crashme = 0;
385 static void write1(const char *out)
390 int vi_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
391 int vi_main(int argc, char **argv)
397 #if ENABLE_FEATURE_VI_USE_SIGNALS || ENABLE_FEATURE_VI_CRASHME
400 #if ENABLE_FEATURE_VI_CRASHME
401 srand((long) my_pid);
403 #ifdef NO_SUCH_APPLET_YET
404 /* If we aren't "vi", we are "view" */
405 if (ENABLE_FEATURE_VI_READONLY && applet_name[2]) {
406 SET_READONLY_MODE(readonly_mode);
410 vi_setops = VI_AUTOINDENT | VI_SHOWMATCH | VI_IGNORECASE;
411 // 1- process $HOME/.exrc file (not inplemented yet)
412 // 2- process EXINIT variable from environment
413 // 3- process command line args
414 #if ENABLE_FEATURE_VI_COLON
416 char *p = getenv("EXINIT");
418 initial_cmds[0] = xstrndup(p, MAX_INPUT_LEN);
421 while ((c = getopt(argc, argv, "hCRH" USE_FEATURE_VI_COLON("c:"))) != -1) {
423 #if ENABLE_FEATURE_VI_CRASHME
428 #if ENABLE_FEATURE_VI_READONLY
429 case 'R': // Read-only flag
430 SET_READONLY_MODE(readonly_mode);
433 #if ENABLE_FEATURE_VI_COLON
434 case 'c': // cmd line vi command
436 initial_cmds[initial_cmds[0] != 0] = xstrndup(optarg, MAX_INPUT_LEN);
448 // The argv array can be used by the ":next" and ":rewind" commands
450 fn_start = optind; // remember first file name for :next and :rew
453 //----- This is the main file handling loop --------------
454 if (optind >= argc) {
457 for (; optind < argc; optind++) {
458 edit_file(argv[optind]);
461 //-----------------------------------------------------------
466 /* read text from file or create an empty buf */
467 /* will also update current_filename */
468 static int init_text_buffer(char *fn)
471 int size = file_size(fn); // file size. -1 means does not exist.
473 /* allocate/reallocate text buffer */
475 text_size = size + 10240;
476 screenbegin = dot = end = text = xzalloc(text_size);
478 if (fn != current_filename) {
479 free(current_filename);
480 current_filename = xstrdup(fn);
483 // file dont exist. Start empty buf with dummy line
484 char_insert(text, '\n');
487 rc = file_insert(fn, text
488 USE_FEATURE_VI_READONLY(, 1));
491 last_file_modified = -1;
492 #if ENABLE_FEATURE_VI_YANKMARK
493 /* init the marks. */
494 memset(mark, 0, sizeof(mark));
499 static void edit_file(char *fn)
501 #if ENABLE_FEATURE_VI_YANKMARK
502 #define cur_line edit_file__cur_line
506 #if ENABLE_FEATURE_VI_USE_SIGNALS
510 editing = 1; // 0 = exit, 1 = one file, 2 = multiple files
515 if (ENABLE_FEATURE_VI_WIN_RESIZE) {
516 get_terminal_width_height(0, &columns, &rows);
517 if (rows > MAX_SCR_ROWS) rows = MAX_SCR_ROWS;
518 if (columns > MAX_SCR_COLS) columns = MAX_SCR_COLS;
520 new_screen(rows, columns); // get memory for virtual screen
521 init_text_buffer(fn);
523 #if ENABLE_FEATURE_VI_YANKMARK
524 YDreg = 26; // default Yank/Delete reg
525 Ureg = 27; // hold orig line for "U" cmd
526 mark[26] = mark[27] = text; // init "previous context"
529 last_forward_char = last_input_char = '\0';
533 #if ENABLE_FEATURE_VI_USE_SIGNALS
535 signal(SIGWINCH, winch_sig);
536 signal(SIGTSTP, suspend_sig);
537 sig = sigsetjmp(restart, 1);
539 screenbegin = dot = text;
543 cmd_mode = 0; // 0=command 1=insert 2='R'eplace
546 offset = 0; // no horizontal offset
548 #if ENABLE_FEATURE_VI_DOT_CMD
550 ioq = ioq_start = NULL;
555 #if ENABLE_FEATURE_VI_COLON
560 while ((p = initial_cmds[n])) {
570 free(initial_cmds[n]);
571 initial_cmds[n] = NULL;
576 redraw(FALSE); // dont force every col re-draw
577 //------This is the main Vi cmd handling loop -----------------------
578 while (editing > 0) {
579 #if ENABLE_FEATURE_VI_CRASHME
581 if ((end - text) > 1) {
582 crash_dummy(); // generate a random command
585 dot = string_insert(text, "\n\n##### Ran out of text to work on. #####\n\n"); // insert the string
590 last_input_char = c = get_one_char(); // get a cmd from user
591 #if ENABLE_FEATURE_VI_YANKMARK
592 // save a copy of the current line- for the 'U" command
593 if (begin_line(dot) != cur_line) {
594 cur_line = begin_line(dot);
595 text_yank(begin_line(dot), end_line(dot), Ureg);
598 #if ENABLE_FEATURE_VI_DOT_CMD
599 // These are commands that change text[].
600 // Remember the input for the "." command
601 if (!adding2q && ioq_start == NULL
602 && cmd_mode == 0 // command mode
603 && c > '\0' // exclude NUL and non-ASCII chars
604 && c < 0x7f // (Unicode and such)
605 && strchr(modifying_cmds, c)
610 do_cmd(c); // execute the user command
612 // poll to see if there is input already waiting. if we are
613 // not able to display output fast enough to keep up, skip
614 // the display update until we catch up with input.
615 if (!chars_to_parse && mysleep(0) == 0) {
616 // no input pending - so update output
620 #if ENABLE_FEATURE_VI_CRASHME
622 crash_test(); // test editor variables
625 //-------------------------------------------------------------------
627 go_bottom_and_clear_to_eol();
632 //----- The Colon commands -------------------------------------
633 #if ENABLE_FEATURE_VI_COLON
634 static char *get_one_address(char *p, int *addr) // get colon addr, if present
638 USE_FEATURE_VI_YANKMARK(char c;)
639 USE_FEATURE_VI_SEARCH(char *pat;)
641 *addr = -1; // assume no addr
642 if (*p == '.') { // the current line
645 *addr = count_lines(text, q);
647 #if ENABLE_FEATURE_VI_YANKMARK
648 else if (*p == '\'') { // is this a mark addr
652 if (c >= 'a' && c <= 'z') {
655 q = mark[(unsigned char) c];
656 if (q != NULL) { // is mark valid
657 *addr = count_lines(text, q); // count lines
662 #if ENABLE_FEATURE_VI_SEARCH
663 else if (*p == '/') { // a search pattern
664 q = strchrnul(++p, '/');
665 pat = xstrndup(p, q - p); // save copy of pattern
669 q = char_search(dot, pat, FORWARD, FULL);
671 *addr = count_lines(text, q);
676 else if (*p == '$') { // the last line in file
678 q = begin_line(end - 1);
679 *addr = count_lines(text, q);
680 } else if (isdigit(*p)) { // specific line number
681 sscanf(p, "%d%n", addr, &st);
684 // unrecognised address - assume -1
690 static char *get_address(char *p, int *b, int *e) // get two colon addrs, if present
692 //----- get the address' i.e., 1,3 'a,'b -----
693 // get FIRST addr, if present
695 p++; // skip over leading spaces
696 if (*p == '%') { // alias for 1,$
699 *e = count_lines(text, end-1);
702 p = get_one_address(p, b);
705 if (*p == ',') { // is there a address separator
709 // get SECOND addr, if present
710 p = get_one_address(p, e);
714 p++; // skip over trailing spaces
718 #if ENABLE_FEATURE_VI_SET && ENABLE_FEATURE_VI_SETOPTS
719 static void setops(const char *args, const char *opname, int flg_no,
720 const char *short_opname, int opt)
722 const char *a = args + flg_no;
723 int l = strlen(opname) - 1; /* opname have + ' ' */
725 if (strncasecmp(a, opname, l) == 0
726 || strncasecmp(a, short_opname, 2) == 0
736 // buf must be no longer than MAX_INPUT_LEN!
737 static void colon(char *buf)
739 char c, *orig_buf, *buf1, *q, *r;
740 char *fn, cmd[MAX_INPUT_LEN], args[MAX_INPUT_LEN];
741 int i, l, li, ch, b, e;
742 int useforce, forced = FALSE;
744 // :3154 // if (-e line 3154) goto it else stay put
745 // :4,33w! foo // write a portion of buffer to file "foo"
746 // :w // write all of buffer to current file
748 // :q! // quit- dont care about modified file
749 // :'a,'z!sort -u // filter block through sort
750 // :'f // goto mark "f"
751 // :'fl // list literal the mark "f" line
752 // :.r bar // read file "bar" into buffer before dot
753 // :/123/,/abc/d // delete lines from "123" line to "abc" line
754 // :/xyz/ // goto the "xyz" line
755 // :s/find/replace/ // substitute pattern "find" with "replace"
756 // :!<cmd> // run <cmd> then return
762 buf++; // move past the ':'
766 q = text; // assume 1,$ for the range
768 li = count_lines(text, end - 1);
769 fn = current_filename;
771 // look for optional address(es) :. :1 :1,9 :'q,'a :%
772 buf = get_address(buf, &b, &e);
774 // remember orig command line
777 // get the COMMAND into cmd[]
779 while (*buf != '\0') {
786 while (isblank(*buf))
790 buf1 = last_char_is(cmd, '!');
793 *buf1 = '\0'; // get rid of !
796 // if there is only one addr, then the addr
797 // is the line number of the single line the
798 // user wants. So, reset the end
799 // pointer to point at end of the "b" line
800 q = find_line(b); // what line is #b
805 // we were given two addrs. change the
806 // end pointer to the addr given by user.
807 r = find_line(e); // what line is #e
811 // ------------ now look for the command ------------
813 if (i == 0) { // :123CR goto line #123
815 dot = find_line(b); // what line is #b
819 #if ENABLE_FEATURE_ALLOW_EXEC
820 else if (strncmp(cmd, "!", 1) == 0) { // run a cmd
822 // :!ls run the <cmd>
823 go_bottom_and_clear_to_eol();
825 retcode = system(orig_buf + 1); // run the cmd
827 printf("\nshell returned %i\n\n", retcode);
829 Hit_Return(); // let user see results
832 else if (strncmp(cmd, "=", i) == 0) { // where is the address
833 if (b < 0) { // no addr given- use defaults
834 b = e = count_lines(text, dot);
836 status_line("%d", b);
837 } else if (strncasecmp(cmd, "delete", i) == 0) { // delete lines
838 if (b < 0) { // no addr given- use defaults
839 q = begin_line(dot); // assume .,. for the range
842 dot = yank_delete(q, r, 1, YANKDEL); // save, then delete lines
844 } else if (strncasecmp(cmd, "edit", i) == 0) { // Edit a file
845 // don't edit, if the current file has been modified
846 if (file_modified && !useforce) {
847 status_line_bold("No write since last change (:edit! overrides)");
851 // the user supplied a file name
853 } else if (current_filename && current_filename[0]) {
854 // no user supplied name- use the current filename
855 // fn = current_filename; was set by default
857 // no user file name, no current name- punt
858 status_line_bold("No current filename");
862 if (init_text_buffer(fn) < 0)
865 #if ENABLE_FEATURE_VI_YANKMARK
866 if (Ureg >= 0 && Ureg < 28 && reg[Ureg] != 0) {
867 free(reg[Ureg]); // free orig line reg- for 'U'
870 if (YDreg >= 0 && YDreg < 28 && reg[YDreg] != 0) {
871 free(reg[YDreg]); // free default yank/delete register
875 // how many lines in text[]?
876 li = count_lines(text, end - 1);
877 status_line("\"%s\"%s"
878 USE_FEATURE_VI_READONLY("%s")
879 " %dL, %dC", current_filename,
880 (file_size(fn) < 0 ? " [New file]" : ""),
881 USE_FEATURE_VI_READONLY(
882 ((readonly_mode) ? " [Readonly]" : ""),
885 } else if (strncasecmp(cmd, "file", i) == 0) { // what File is this
886 if (b != -1 || e != -1) {
887 not_implemented("No address allowed on this command");
891 // user wants a new filename
892 free(current_filename);
893 current_filename = xstrdup(args);
895 // user wants file status info
896 last_status_cksum = 0; // force status update
898 } else if (strncasecmp(cmd, "features", i) == 0) { // what features are available
899 // print out values of all features
900 go_bottom_and_clear_to_eol();
905 } else if (strncasecmp(cmd, "list", i) == 0) { // literal print line
906 if (b < 0) { // no addr given- use defaults
907 q = begin_line(dot); // assume .,. for the range
910 go_bottom_and_clear_to_eol();
912 for (; q <= r; q++) {
916 c_is_no_print = (c & 0x80) && !Isprint(c);
923 } else if (c < ' ' || c == 127) {
934 #if ENABLE_FEATURE_VI_SET
938 } else if (strncasecmp(cmd, "quit", i) == 0 // Quit
939 || strncasecmp(cmd, "next", i) == 0 // edit next file
942 // force end of argv list
949 // don't exit if the file been modified
951 status_line_bold("No write since last change (:%s! overrides)",
952 (*cmd == 'q' ? "quit" : "next"));
955 // are there other file to edit
956 if (*cmd == 'q' && optind < save_argc - 1) {
957 status_line_bold("%d more file to edit", (save_argc - optind - 1));
960 if (*cmd == 'n' && optind >= save_argc - 1) {
961 status_line_bold("No more files to edit");
965 } else if (strncasecmp(cmd, "read", i) == 0) { // read file into text[]
968 status_line_bold("No filename given");
971 if (b < 0) { // no addr given- use defaults
972 q = begin_line(dot); // assume "dot"
974 // read after current line- unless user said ":0r foo"
977 ch = file_insert(fn, q USE_FEATURE_VI_READONLY(, 0));
979 goto vc1; // nothing was inserted
980 // how many lines in text[]?
981 li = count_lines(q, q + ch - 1);
983 USE_FEATURE_VI_READONLY("%s")
985 USE_FEATURE_VI_READONLY((readonly_mode ? " [Readonly]" : ""),)
988 // if the insert is before "dot" then we need to update
993 } else if (strncasecmp(cmd, "rewind", i) == 0) { // rewind cmd line args
994 if (file_modified && !useforce) {
995 status_line_bold("No write since last change (:rewind! overrides)");
997 // reset the filenames to edit
998 optind = fn_start - 1;
1001 #if ENABLE_FEATURE_VI_SET
1002 } else if (strncasecmp(cmd, "set", i) == 0) { // set or clear features
1003 #if ENABLE_FEATURE_VI_SETOPTS
1006 i = 0; // offset into args
1007 // only blank is regarded as args delmiter. What about tab '\t' ?
1008 if (!args[0] || strcasecmp(args, "all") == 0) {
1009 // print out values of all options
1010 go_bottom_and_clear_to_eol();
1011 printf("----------------------------------------\r\n");
1012 #if ENABLE_FEATURE_VI_SETOPTS
1015 printf("autoindent ");
1021 printf("ignorecase ");
1024 printf("showmatch ");
1025 printf("tabstop=%d ", tabstop);
1030 #if ENABLE_FEATURE_VI_SETOPTS
1033 if (strncasecmp(argp, "no", 2) == 0)
1034 i = 2; // ":set noautoindent"
1035 setops(argp, "autoindent ", i, "ai", VI_AUTOINDENT);
1036 setops(argp, "flash ", i, "fl", VI_ERR_METHOD);
1037 setops(argp, "ignorecase ", i, "ic", VI_IGNORECASE);
1038 setops(argp, "showmatch ", i, "ic", VI_SHOWMATCH);
1040 if (strncasecmp(argp + i, "tabstop=%d ", 7) == 0) {
1041 sscanf(strchr(argp + i, '='), "tabstop=%d" + 7, &ch);
1042 if (ch > 0 && ch <= MAX_TABSTOP)
1045 while (*argp && *argp != ' ')
1046 argp++; // skip to arg delimiter (i.e. blank)
1047 while (*argp && *argp == ' ')
1048 argp++; // skip all delimiting blanks
1050 #endif /* FEATURE_VI_SETOPTS */
1051 #endif /* FEATURE_VI_SET */
1052 #if ENABLE_FEATURE_VI_SEARCH
1053 } else if (strncasecmp(cmd, "s", 1) == 0) { // substitute a pattern with a replacement pattern
1057 // F points to the "find" pattern
1058 // R points to the "replace" pattern
1059 // replace the cmd line delimiters "/" with NULLs
1060 gflag = 0; // global replace flag
1061 c = orig_buf[1]; // what is the delimiter
1062 F = orig_buf + 2; // start of "find"
1063 R = strchr(F, c); // middle delimiter
1064 if (!R) goto colon_s_fail;
1065 *R++ = '\0'; // terminate "find"
1066 buf1 = strchr(R, c);
1067 if (!buf1) goto colon_s_fail;
1068 *buf1++ = '\0'; // terminate "replace"
1069 if (*buf1 == 'g') { // :s/foo/bar/g
1071 gflag++; // turn on gflag
1074 if (b < 0) { // maybe :s/foo/bar/
1075 q = begin_line(dot); // start with cur line
1076 b = count_lines(text, q); // cur line number
1079 e = b; // maybe :.s/foo/bar/
1080 for (i = b; i <= e; i++) { // so, :20,23 s \0 find \0 replace \0
1081 ls = q; // orig line start
1083 buf1 = char_search(q, F, FORWARD, LIMITED); // search cur line only for "find"
1085 // we found the "find" pattern - delete it
1086 text_hole_delete(buf1, buf1 + strlen(F) - 1);
1087 // inset the "replace" patern
1088 string_insert(buf1, R); // insert the string
1089 // check for "global" :s/foo/bar/g
1091 if ((buf1 + strlen(R)) < end_line(ls)) {
1092 q = buf1 + strlen(R);
1093 goto vc4; // don't let q move past cur line
1099 #endif /* FEATURE_VI_SEARCH */
1100 } else if (strncasecmp(cmd, "version", i) == 0) { // show software version
1101 status_line(BB_VER " " BB_BT);
1102 } else if (strncasecmp(cmd, "write", i) == 0 // write text to file
1103 || strncasecmp(cmd, "wq", i) == 0
1104 || strncasecmp(cmd, "wn", i) == 0
1105 || strncasecmp(cmd, "x", i) == 0
1107 // is there a file name to write to?
1111 #if ENABLE_FEATURE_VI_READONLY
1112 if (readonly_mode && !useforce) {
1113 status_line_bold("\"%s\" File is read only", fn);
1117 // how many lines in text[]?
1118 li = count_lines(q, r);
1120 // see if file exists- if not, its just a new file request
1122 // if "fn" is not write-able, chmod u+w
1123 // sprintf(syscmd, "chmod u+w %s", fn);
1127 l = file_write(fn, q, r);
1128 if (useforce && forced) {
1130 // sprintf(syscmd, "chmod u-w %s", fn);
1136 status_line_bold("\"%s\" %s", fn, strerror(errno));
1138 status_line("\"%s\" %dL, %dC", fn, li, l);
1139 if (q == text && r == end - 1 && l == ch) {
1141 last_file_modified = -1;
1143 if ((cmd[0] == 'x' || cmd[1] == 'q' || cmd[1] == 'n' ||
1144 cmd[0] == 'X' || cmd[1] == 'Q' || cmd[1] == 'N')
1149 #if ENABLE_FEATURE_VI_READONLY
1152 #if ENABLE_FEATURE_VI_YANKMARK
1153 } else if (strncasecmp(cmd, "yank", i) == 0) { // yank lines
1154 if (b < 0) { // no addr given- use defaults
1155 q = begin_line(dot); // assume .,. for the range
1158 text_yank(q, r, YDreg);
1159 li = count_lines(q, r);
1160 status_line("Yank %d lines (%d chars) into [%c]",
1161 li, strlen(reg[YDreg]), what_reg());
1165 not_implemented(cmd);
1168 dot = bound_dot(dot); // make sure "dot" is valid
1170 #if ENABLE_FEATURE_VI_SEARCH
1172 status_line(":s expression missing delimiters");
1176 #endif /* FEATURE_VI_COLON */
1178 static void Hit_Return(void)
1183 write1("[Hit return to continue]");
1185 while ((c = get_one_char()) != '\n' && c != '\r')
1187 redraw(TRUE); // force redraw all
1190 static int next_tabstop(int col)
1192 return col + ((tabstop - 1) - (col % tabstop));
1195 //----- Synchronize the cursor to Dot --------------------------
1196 static void sync_cursor(char *d, int *row, int *col)
1198 char *beg_cur; // begin and end of "d" line
1202 beg_cur = begin_line(d); // first char of cur line
1204 if (beg_cur < screenbegin) {
1205 // "d" is before top line on screen
1206 // how many lines do we have to move
1207 cnt = count_lines(beg_cur, screenbegin);
1209 screenbegin = beg_cur;
1210 if (cnt > (rows - 1) / 2) {
1211 // we moved too many lines. put "dot" in middle of screen
1212 for (cnt = 0; cnt < (rows - 1) / 2; cnt++) {
1213 screenbegin = prev_line(screenbegin);
1217 char *end_scr; // begin and end of screen
1218 end_scr = end_screen(); // last char of screen
1219 if (beg_cur > end_scr) {
1220 // "d" is after bottom line on screen
1221 // how many lines do we have to move
1222 cnt = count_lines(end_scr, beg_cur);
1223 if (cnt > (rows - 1) / 2)
1224 goto sc1; // too many lines
1225 for (ro = 0; ro < cnt - 1; ro++) {
1226 // move screen begin the same amount
1227 screenbegin = next_line(screenbegin);
1228 // now, move the end of screen
1229 end_scr = next_line(end_scr);
1230 end_scr = end_line(end_scr);
1234 // "d" is on screen- find out which row
1236 for (ro = 0; ro < rows - 1; ro++) { // drive "ro" to correct row
1242 // find out what col "d" is on
1244 while (tp < d) { // drive "co" to correct column
1245 if (*tp == '\n') //vda || *tp == '\0')
1248 // handle tabs like real vi
1249 if (d == tp && cmd_mode) {
1252 co = next_tabstop(co);
1253 } else if ((unsigned char)*tp < ' ' || *tp == 0x7f) {
1254 co++; // display as ^X, use 2 columns
1260 // "co" is the column where "dot" is.
1261 // The screen has "columns" columns.
1262 // The currently displayed columns are 0+offset -- columns+ofset
1263 // |-------------------------------------------------------------|
1265 // offset | |------- columns ----------------|
1267 // If "co" is already in this range then we do not have to adjust offset
1268 // but, we do have to subtract the "offset" bias from "co".
1269 // If "co" is outside this range then we have to change "offset".
1270 // If the first char of a line is a tab the cursor will try to stay
1271 // in column 7, but we have to set offset to 0.
1273 if (co < 0 + offset) {
1276 if (co >= columns + offset) {
1277 offset = co - columns + 1;
1279 // if the first char of the line is a tab, and "dot" is sitting on it
1280 // force offset to 0.
1281 if (d == beg_cur && *d == '\t') {
1290 //----- Text Movement Routines ---------------------------------
1291 static char *begin_line(char *p) // return pointer to first char cur line
1294 p = memrchr(text, '\n', p - text);
1302 static char *end_line(char *p) // return pointer to NL of cur line
1305 p = memchr(p, '\n', end - p - 1);
1312 static char *dollar_line(char *p) // return pointer to just before NL line
1315 // Try to stay off of the Newline
1316 if (*p == '\n' && (p - begin_line(p)) > 0)
1321 static char *prev_line(char *p) // return pointer first char prev line
1323 p = begin_line(p); // goto begining of cur line
1324 if (p > text && p[-1] == '\n')
1325 p--; // step to prev line
1326 p = begin_line(p); // goto begining of prev line
1330 static char *next_line(char *p) // return pointer first char next line
1333 if (p < end - 1 && *p == '\n')
1334 p++; // step to next line
1338 //----- Text Information Routines ------------------------------
1339 static char *end_screen(void)
1344 // find new bottom line
1346 for (cnt = 0; cnt < rows - 2; cnt++)
1352 // count line from start to stop
1353 static int count_lines(char *start, char *stop)
1358 if (stop < start) { // start and stop are backwards- reverse them
1364 stop = end_line(stop);
1365 while (start <= stop && start <= end - 1) {
1366 start = end_line(start);
1374 static char *find_line(int li) // find begining of line #li
1378 for (q = text; li > 1; li--) {
1384 //----- Dot Movement Routines ----------------------------------
1385 static void dot_left(void)
1387 if (dot > text && dot[-1] != '\n')
1391 static void dot_right(void)
1393 if (dot < end - 1 && *dot != '\n')
1397 static void dot_begin(void)
1399 dot = begin_line(dot); // return pointer to first char cur line
1402 static void dot_end(void)
1404 dot = end_line(dot); // return pointer to last char cur line
1407 static char *move_to_col(char *p, int l)
1413 while (co < l && p < end) {
1414 if (*p == '\n') //vda || *p == '\0')
1417 co = next_tabstop(co);
1418 } else if (*p < ' ' || *p == 127) {
1419 co++; // display as ^X, use 2 columns
1427 static void dot_next(void)
1429 dot = next_line(dot);
1432 static void dot_prev(void)
1434 dot = prev_line(dot);
1437 static void dot_scroll(int cnt, int dir)
1441 for (; cnt > 0; cnt--) {
1444 // ctrl-Y scroll up one line
1445 screenbegin = prev_line(screenbegin);
1448 // ctrl-E scroll down one line
1449 screenbegin = next_line(screenbegin);
1452 // make sure "dot" stays on the screen so we dont scroll off
1453 if (dot < screenbegin)
1455 q = end_screen(); // find new bottom line
1457 dot = begin_line(q); // is dot is below bottom line?
1461 static void dot_skip_over_ws(void)
1464 while (isspace(*dot) && *dot != '\n' && dot < end - 1)
1468 static void dot_delete(void) // delete the char at 'dot'
1470 text_hole_delete(dot, dot);
1473 static char *bound_dot(char *p) // make sure text[0] <= P < "end"
1475 if (p >= end && end > text) {
1477 indicate_error('1');
1481 indicate_error('2');
1486 //----- Helper Utility Routines --------------------------------
1488 //----------------------------------------------------------------
1489 //----- Char Routines --------------------------------------------
1490 /* Chars that are part of a word-
1491 * 0123456789_ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz
1492 * Chars that are Not part of a word (stoppers)
1493 * !"#$%&'()*+,-./:;<=>?@[\]^`{|}~
1494 * Chars that are WhiteSpace
1495 * TAB NEWLINE VT FF RETURN SPACE
1496 * DO NOT COUNT NEWLINE AS WHITESPACE
1499 static char *new_screen(int ro, int co)
1504 screensize = ro * co + 8;
1505 screen = xmalloc(screensize);
1506 // initialize the new screen. assume this will be a empty file.
1508 // non-existent text[] lines start with a tilde (~).
1509 for (li = 1; li < ro - 1; li++) {
1510 screen[(li * co) + 0] = '~';
1515 #if ENABLE_FEATURE_VI_SEARCH
1516 static int mycmp(const char *s1, const char *s2, int len)
1520 i = strncmp(s1, s2, len);
1521 if (ENABLE_FEATURE_VI_SETOPTS && ignorecase) {
1522 i = strncasecmp(s1, s2, len);
1527 // search for pattern starting at p
1528 static char *char_search(char *p, const char *pat, int dir, int range)
1530 #ifndef REGEX_SEARCH
1535 if (dir == FORWARD) {
1536 stop = end - 1; // assume range is p - end-1
1537 if (range == LIMITED)
1538 stop = next_line(p); // range is to next line
1539 for (start = p; start < stop; start++) {
1540 if (mycmp(start, pat, len) == 0) {
1544 } else if (dir == BACK) {
1545 stop = text; // assume range is text - p
1546 if (range == LIMITED)
1547 stop = prev_line(p); // range is to prev line
1548 for (start = p - len; start >= stop; start--) {
1549 if (mycmp(start, pat, len) == 0) {
1554 // pattern not found
1556 #else /* REGEX_SEARCH */
1558 struct re_pattern_buffer preg;
1562 re_syntax_options = RE_SYNTAX_POSIX_EXTENDED;
1568 // assume a LIMITED forward search
1576 // count the number of chars to search over, forward or backward
1580 // RANGE could be negative if we are searching backwards
1583 q = re_compile_pattern(pat, strlen(pat), &preg);
1585 // The pattern was not compiled
1586 status_line_bold("bad search pattern: \"%s\": %s", pat, q);
1587 i = 0; // return p if pattern not compiled
1597 // search for the compiled pattern, preg, in p[]
1598 // range < 0- search backward
1599 // range > 0- search forward
1601 // re_search() < 0 not found or error
1602 // re_search() > 0 index of found pattern
1603 // struct pattern char int int int struct reg
1604 // re_search (*pattern_buffer, *string, size, start, range, *regs)
1605 i = re_search(&preg, q, size, 0, range, 0);
1608 i = 0; // return NULL if pattern not found
1611 if (dir == FORWARD) {
1617 #endif /* REGEX_SEARCH */
1619 #endif /* FEATURE_VI_SEARCH */
1621 static char *char_insert(char *p, char c) // insert the char c at 'p'
1623 if (c == 22) { // Is this an ctrl-V?
1624 p = stupid_insert(p, '^'); // use ^ to indicate literal next
1625 p--; // backup onto ^
1626 refresh(FALSE); // show the ^
1631 } else if (c == 27) { // Is this an ESC?
1634 end_cmd_q(); // stop adding to q
1635 last_status_cksum = 0; // force status update
1636 if ((p[-1] != '\n') && (dot > text)) {
1639 } else if (c == erase_char || c == 8 || c == 127) { // Is this a BS
1641 if ((p[-1] != '\n') && (dot>text)) {
1643 p = text_hole_delete(p, p); // shrink buffer 1 char
1646 // insert a char into text[]
1647 char *sp; // "save p"
1650 c = '\n'; // translate \r to \n
1651 sp = p; // remember addr of insert
1652 p = stupid_insert(p, c); // insert the char
1653 #if ENABLE_FEATURE_VI_SETOPTS
1654 if (showmatch && strchr(")]}", *sp) != NULL) {
1657 if (autoindent && c == '\n') { // auto indent the new line
1660 q = prev_line(p); // use prev line as templet
1661 for (; isblank(*q); q++) {
1662 p = stupid_insert(p, *q); // insert the char
1670 static char *stupid_insert(char *p, char c) // stupidly insert the char c at 'p'
1672 p = text_hole_make(p, 1);
1674 //file_modified++; - done by text_hole_make()
1678 static int find_range(char **start, char **stop, char c)
1680 char *save_dot, *p, *q, *t;
1681 int cnt, multiline = 0;
1686 if (strchr("cdy><", c)) {
1687 // these cmds operate on whole lines
1688 p = q = begin_line(p);
1689 for (cnt = 1; cnt < cmdcnt; cnt++) {
1693 } else if (strchr("^%$0bBeEfth\b\177", c)) {
1694 // These cmds operate on char positions
1695 do_cmd(c); // execute movement cmd
1697 } else if (strchr("wW", c)) {
1698 do_cmd(c); // execute movement cmd
1699 // if we are at the next word's first char
1700 // step back one char
1701 // but check the possibilities when it is true
1702 if (dot > text && ((isspace(dot[-1]) && !isspace(dot[0]))
1703 || (ispunct(dot[-1]) && !ispunct(dot[0]))
1704 || (isalnum(dot[-1]) && !isalnum(dot[0]))))
1705 dot--; // move back off of next word
1706 if (dot > text && *dot == '\n')
1707 dot--; // stay off NL
1709 } else if (strchr("H-k{", c)) {
1710 // these operate on multi-lines backwards
1711 q = end_line(dot); // find NL
1712 do_cmd(c); // execute movement cmd
1715 } else if (strchr("L+j}\r\n", c)) {
1716 // these operate on multi-lines forwards
1717 p = begin_line(dot);
1718 do_cmd(c); // execute movement cmd
1719 dot_end(); // find NL
1722 // nothing -- this causes any other values of c to
1723 // represent the one-character range under the
1724 // cursor. this is correct for ' ' and 'l', but
1725 // perhaps no others.
1734 // backward char movements don't include start position
1735 if (q > p && strchr("^0bBh\b\177", c)) q--;
1738 for (t = p; t <= q; t++) {
1751 static int st_test(char *p, int type, int dir, char *tested)
1761 if (type == S_BEFORE_WS) {
1763 test = ((!isspace(c)) || c == '\n');
1765 if (type == S_TO_WS) {
1767 test = ((!isspace(c)) || c == '\n');
1769 if (type == S_OVER_WS) {
1771 test = ((isspace(c)));
1773 if (type == S_END_PUNCT) {
1775 test = ((ispunct(c)));
1777 if (type == S_END_ALNUM) {
1779 test = ((isalnum(c)) || c == '_');
1785 static char *skip_thing(char *p, int linecnt, int dir, int type)
1789 while (st_test(p, type, dir, &c)) {
1790 // make sure we limit search to correct number of lines
1791 if (c == '\n' && --linecnt < 1)
1793 if (dir >= 0 && p >= end - 1)
1795 if (dir < 0 && p <= text)
1797 p += dir; // move to next char
1802 // find matching char of pair () [] {}
1803 static char *find_pair(char *p, const char c)
1810 dir = 1; // assume forward
1812 case '(': match = ')'; break;
1813 case '[': match = ']'; break;
1814 case '{': match = '}'; break;
1815 case ')': match = '('; dir = -1; break;
1816 case ']': match = '['; dir = -1; break;
1817 case '}': match = '{'; dir = -1; break;
1819 for (q = p + dir; text <= q && q < end; q += dir) {
1820 // look for match, count levels of pairs (( ))
1822 level++; // increase pair levels
1824 level--; // reduce pair level
1826 break; // found matching pair
1829 q = NULL; // indicate no match
1833 #if ENABLE_FEATURE_VI_SETOPTS
1834 // show the matching char of a pair, () [] {}
1835 static void showmatching(char *p)
1839 // we found half of a pair
1840 q = find_pair(p, *p); // get loc of matching char
1842 indicate_error('3'); // no matching char
1844 // "q" now points to matching pair
1845 save_dot = dot; // remember where we are
1846 dot = q; // go to new loc
1847 refresh(FALSE); // let the user see it
1848 mysleep(40); // give user some time
1849 dot = save_dot; // go back to old loc
1853 #endif /* FEATURE_VI_SETOPTS */
1855 // open a hole in text[]
1856 static char *text_hole_make(char *p, int size) // at "p", make a 'size' byte hole
1860 end += size; // adjust the new END
1861 if (end >= (text + text_size)) {
1863 text_size += end - (text + text_size) + 10240;
1864 new_text = xrealloc(text, text_size);
1865 screenbegin = new_text + (screenbegin - text);
1866 dot = new_text + (dot - text);
1867 end = new_text + (end - text);
1868 p = new_text + (p - text);
1871 memmove(p + size, p, end - size - p);
1872 memset(p, ' ', size); // clear new hole
1877 // close a hole in text[]
1878 static char *text_hole_delete(char *p, char *q) // delete "p" through "q", inclusive
1883 // move forwards, from beginning
1887 if (q < p) { // they are backward- swap them
1891 hole_size = q - p + 1;
1893 if (src < text || src > end)
1895 if (dest < text || dest >= end)
1898 goto thd_atend; // just delete the end of the buffer
1899 memmove(dest, src, cnt);
1901 end = end - hole_size; // adjust the new END
1903 dest = end - 1; // make sure dest in below end-1
1905 dest = end = text; // keep pointers valid
1911 // copy text into register, then delete text.
1912 // if dist <= 0, do not include, or go past, a NewLine
1914 static char *yank_delete(char *start, char *stop, int dist, int yf)
1918 // make sure start <= stop
1920 // they are backwards, reverse them
1926 // we cannot cross NL boundaries
1930 // dont go past a NewLine
1931 for (; p + 1 <= stop; p++) {
1933 stop = p; // "stop" just before NewLine
1939 #if ENABLE_FEATURE_VI_YANKMARK
1940 text_yank(start, stop, YDreg);
1942 if (yf == YANKDEL) {
1943 p = text_hole_delete(start, stop);
1948 static void show_help(void)
1950 puts("These features are available:"
1951 #if ENABLE_FEATURE_VI_SEARCH
1952 "\n\tPattern searches with / and ?"
1954 #if ENABLE_FEATURE_VI_DOT_CMD
1955 "\n\tLast command repeat with \'.\'"
1957 #if ENABLE_FEATURE_VI_YANKMARK
1958 "\n\tLine marking with 'x"
1959 "\n\tNamed buffers with \"x"
1961 #if ENABLE_FEATURE_VI_READONLY
1962 "\n\tReadonly if vi is called as \"view\""
1963 "\n\tReadonly with -R command line arg"
1965 #if ENABLE_FEATURE_VI_SET
1966 "\n\tSome colon mode commands with \':\'"
1968 #if ENABLE_FEATURE_VI_SETOPTS
1969 "\n\tSettable options with \":set\""
1971 #if ENABLE_FEATURE_VI_USE_SIGNALS
1972 "\n\tSignal catching- ^C"
1973 "\n\tJob suspend and resume with ^Z"
1975 #if ENABLE_FEATURE_VI_WIN_RESIZE
1976 "\n\tAdapt to window re-sizes"
1981 #if ENABLE_FEATURE_VI_DOT_CMD
1982 static void start_new_cmd_q(char c)
1984 // get buffer for new cmd
1985 // if there is a current cmd count put it in the buffer first
1987 lmc_len = sprintf(last_modifying_cmd, "%d%c", cmdcnt, c);
1988 } else { // just save char c onto queue
1989 last_modifying_cmd[0] = c;
1995 static void end_cmd_q(void)
1997 #if ENABLE_FEATURE_VI_YANKMARK
1998 YDreg = 26; // go back to default Yank/Delete reg
2002 #endif /* FEATURE_VI_DOT_CMD */
2004 #if ENABLE_FEATURE_VI_YANKMARK \
2005 || (ENABLE_FEATURE_VI_COLON && ENABLE_FEATURE_VI_SEARCH) \
2006 || ENABLE_FEATURE_VI_CRASHME
2007 static char *string_insert(char *p, char *s) // insert the string at 'p'
2012 text_hole_make(p, i);
2014 for (cnt = 0; *s != '\0'; s++) {
2018 #if ENABLE_FEATURE_VI_YANKMARK
2019 status_line("Put %d lines (%d chars) from [%c]", cnt, i, what_reg());
2025 #if ENABLE_FEATURE_VI_YANKMARK
2026 static char *text_yank(char *p, char *q, int dest) // copy text into a register
2031 if (q < p) { // they are backwards- reverse them
2038 free(t); // if already a yank register, free it
2039 t = xmalloc(cnt + 1); // get a new register
2040 memset(t, '\0', cnt + 1); // clear new text[]
2041 strncpy(t, p, cnt); // copy text[] into bufer
2046 static char what_reg(void)
2050 c = 'D'; // default to D-reg
2051 if (0 <= YDreg && YDreg <= 25)
2052 c = 'a' + (char) YDreg;
2060 static void check_context(char cmd)
2062 // A context is defined to be "modifying text"
2063 // Any modifying command establishes a new context.
2065 if (dot < context_start || dot > context_end) {
2066 if (strchr(modifying_cmds, cmd) != NULL) {
2067 // we are trying to modify text[]- make this the current context
2068 mark[27] = mark[26]; // move cur to prev
2069 mark[26] = dot; // move local to cur
2070 context_start = prev_line(prev_line(dot));
2071 context_end = next_line(next_line(dot));
2072 //loiter= start_loiter= now;
2077 static char *swap_context(char *p) // goto new context for '' command make this the current context
2081 // the current context is in mark[26]
2082 // the previous context is in mark[27]
2083 // only swap context if other context is valid
2084 if (text <= mark[27] && mark[27] <= end - 1) {
2086 mark[27] = mark[26];
2088 p = mark[26]; // where we are going- previous context
2089 context_start = prev_line(prev_line(prev_line(p)));
2090 context_end = next_line(next_line(next_line(p)));
2094 #endif /* FEATURE_VI_YANKMARK */
2096 //----- Set terminal attributes --------------------------------
2097 static void rawmode(void)
2099 tcgetattr(0, &term_orig);
2100 term_vi = term_orig;
2101 term_vi.c_lflag &= (~ICANON & ~ECHO); // leave ISIG ON- allow intr's
2102 term_vi.c_iflag &= (~IXON & ~ICRNL);
2103 term_vi.c_oflag &= (~ONLCR);
2104 term_vi.c_cc[VMIN] = 1;
2105 term_vi.c_cc[VTIME] = 0;
2106 erase_char = term_vi.c_cc[VERASE];
2107 tcsetattr(0, TCSANOW, &term_vi);
2110 static void cookmode(void)
2113 tcsetattr(0, TCSANOW, &term_orig);
2116 //----- Come here when we get a window resize signal ---------
2117 #if ENABLE_FEATURE_VI_USE_SIGNALS
2118 static void winch_sig(int sig UNUSED_PARAM)
2120 // FIXME: do it in main loop!!!
2121 signal(SIGWINCH, winch_sig);
2122 if (ENABLE_FEATURE_VI_WIN_RESIZE) {
2123 get_terminal_width_height(0, &columns, &rows);
2124 if (rows > MAX_SCR_ROWS) rows = MAX_SCR_ROWS;
2125 if (columns > MAX_SCR_COLS) columns = MAX_SCR_COLS;
2127 new_screen(rows, columns); // get memory for virtual screen
2128 redraw(TRUE); // re-draw the screen
2131 //----- Come here when we get a continue signal -------------------
2132 static void cont_sig(int sig UNUSED_PARAM)
2134 rawmode(); // terminal to "raw"
2135 last_status_cksum = 0; // force status update
2136 redraw(TRUE); // re-draw the screen
2138 signal(SIGTSTP, suspend_sig);
2139 signal(SIGCONT, SIG_DFL);
2140 kill(my_pid, SIGCONT); // huh? why? we are already "continued"...
2143 //----- Come here when we get a Suspend signal -------------------
2144 static void suspend_sig(int sig UNUSED_PARAM)
2146 go_bottom_and_clear_to_eol();
2147 cookmode(); // terminal to "cooked"
2149 signal(SIGCONT, cont_sig);
2150 signal(SIGTSTP, SIG_DFL);
2151 kill(my_pid, SIGTSTP);
2154 //----- Come here when we get a signal ---------------------------
2155 static void catch_sig(int sig)
2157 signal(SIGINT, catch_sig);
2159 siglongjmp(restart, sig);
2161 #endif /* FEATURE_VI_USE_SIGNALS */
2163 static int mysleep(int hund) // sleep for 'h' 1/100 seconds
2165 struct pollfd pfd[1];
2168 pfd[0].events = POLLIN;
2169 return safe_poll(pfd, 1, hund*10) > 0;
2172 //----- IO Routines --------------------------------------------
2173 static int readit(void) // read (maybe cursor) key from stdin
2178 c = read_key(STDIN_FILENO, &chars_to_parse, readbuffer);
2179 if (c == -1) { // EOF/error
2180 go_bottom_and_clear_to_eol();
2181 cookmode(); // terminal to "cooked"
2182 bb_error_msg_and_die("can't read user input");
2187 //----- IO Routines --------------------------------------------
2188 static int get_one_char(void)
2192 #if ENABLE_FEATURE_VI_DOT_CMD
2194 // we are not adding to the q.
2195 // but, we may be reading from a q
2197 // there is no current q, read from STDIN
2198 c = readit(); // get the users input
2200 // there is a queue to get chars from first
2201 // careful with correct sign expansion!
2202 c = (unsigned char)*ioq++;
2204 // the end of the q, read from STDIN
2206 ioq_start = ioq = 0;
2207 c = readit(); // get the users input
2211 // adding STDIN chars to q
2212 c = readit(); // get the users input
2213 if (lmc_len >= MAX_INPUT_LEN - 1) {
2214 status_line_bold("last_modifying_cmd overrun");
2216 // add new char to q
2217 last_modifying_cmd[lmc_len++] = c;
2221 c = readit(); // get the users input
2222 #endif /* FEATURE_VI_DOT_CMD */
2226 // Get input line (uses "status line" area)
2227 static char *get_input_line(const char *prompt)
2229 // char [MAX_INPUT_LEN]
2230 #define buf get_input_line__buf
2235 strcpy(buf, prompt);
2236 last_status_cksum = 0; // force status update
2237 go_bottom_and_clear_to_eol();
2238 write1(prompt); // write out the :, /, or ? prompt
2241 while (i < MAX_INPUT_LEN) {
2243 if (c == '\n' || c == '\r' || c == 27)
2244 break; // this is end of input
2245 if (c == erase_char || c == 8 || c == 127) {
2246 // user wants to erase prev char
2248 write1("\b \b"); // erase char on screen
2249 if (i <= 0) // user backs up before b-o-l, exit
2251 } else if (c > 0 && c < 256) { // exclude Unicode
2252 // (TODO: need to handle Unicode)
2263 static int file_size(const char *fn) // what is the byte size of "fn"
2269 if (fn && fn[0] && stat(fn, &st_buf) == 0) // see if file exists
2270 cnt = (int) st_buf.st_size;
2274 static int file_insert(const char *fn, char *p
2275 USE_FEATURE_VI_READONLY(, int update_ro_status))
2279 struct stat statbuf;
2282 if (stat(fn, &statbuf) < 0) {
2283 status_line_bold("\"%s\" %s", fn, strerror(errno));
2286 if (!S_ISREG(statbuf.st_mode)) {
2287 // This is not a regular file
2288 status_line_bold("\"%s\" Not a regular file", fn);
2291 if (p < text || p > end) {
2292 status_line_bold("Trying to insert file outside of memory");
2296 // read file to buffer
2297 fd = open(fn, O_RDONLY);
2299 status_line_bold("\"%s\" %s", fn, strerror(errno));
2302 size = statbuf.st_size;
2303 p = text_hole_make(p, size);
2304 cnt = safe_read(fd, p, size);
2306 status_line_bold("\"%s\" %s", fn, strerror(errno));
2307 p = text_hole_delete(p, p + size - 1); // un-do buffer insert
2308 } else if (cnt < size) {
2309 // There was a partial read, shrink unused space text[]
2310 p = text_hole_delete(p + cnt, p + (size - cnt) - 1); // un-do buffer insert
2311 status_line_bold("cannot read all of file \"%s\"", fn);
2317 #if ENABLE_FEATURE_VI_READONLY
2318 if (update_ro_status
2319 && ((access(fn, W_OK) < 0) ||
2320 /* root will always have access()
2321 * so we check fileperms too */
2322 !(statbuf.st_mode & (S_IWUSR | S_IWGRP | S_IWOTH))
2325 SET_READONLY_FILE(readonly_mode);
2331 static int file_write(char *fn, char *first, char *last)
2333 int fd, cnt, charcnt;
2336 status_line_bold("No current filename");
2340 /* By popular request we do not open file with O_TRUNC,
2341 * but instead ftruncate() it _after_ successful write.
2342 * Might reduce amount of data lost on power fail etc.
2344 fd = open(fn, (O_WRONLY | O_CREAT), 0666);
2347 cnt = last - first + 1;
2348 charcnt = full_write(fd, first, cnt);
2349 ftruncate(fd, charcnt);
2350 if (charcnt == cnt) {
2352 //file_modified = FALSE;
2360 //----- Terminal Drawing ---------------------------------------
2361 // The terminal is made up of 'rows' line of 'columns' columns.
2362 // classically this would be 24 x 80.
2363 // screen coordinates
2369 // 23,0 ... 23,79 <- status line
2371 //----- Move the cursor to row x col (count from 0, not 1) -------
2372 static void place_cursor(int row, int col, int optimize)
2374 char cm1[sizeof(CMrc) + sizeof(int)*3 * 2];
2375 #if ENABLE_FEATURE_VI_OPTIMIZE_CURSOR
2377 SZ_UP = sizeof(CMup),
2378 SZ_DN = sizeof(CMdown),
2379 SEQ_SIZE = SZ_UP > SZ_DN ? SZ_UP : SZ_DN,
2381 char cm2[SEQ_SIZE * 5 + 32]; // bigger than worst case size
2385 if (row < 0) row = 0;
2386 if (row >= rows) row = rows - 1;
2387 if (col < 0) col = 0;
2388 if (col >= columns) col = columns - 1;
2390 //----- 1. Try the standard terminal ESC sequence
2391 sprintf(cm1, CMrc, row + 1, col + 1);
2394 #if ENABLE_FEATURE_VI_OPTIMIZE_CURSOR
2395 if (optimize && col < 16) {
2397 int Rrow = last_row;
2398 int diff = Rrow - row;
2400 if (diff < -5 || diff > 5)
2403 //----- find the minimum # of chars to move cursor -------------
2404 //----- 2. Try moving with discreet chars (Newline, [back]space, ...)
2407 // move to the correct row
2408 while (row < Rrow) {
2409 // the cursor has to move up
2413 while (row > Rrow) {
2414 // the cursor has to move down
2415 strcat(cm2, CMdown);
2419 // now move to the correct column
2420 strcat(cm2, "\r"); // start at col 0
2421 // just send out orignal source char to get to correct place
2422 screenp = &screen[row * columns]; // start of screen line
2423 strncat(cm2, screenp, col);
2425 // pick the shortest cursor motion to send out
2426 if (strlen(cm2) < strlen(cm)) {
2432 #endif /* FEATURE_VI_OPTIMIZE_CURSOR */
2436 //----- Erase from cursor to end of line -----------------------
2437 static void clear_to_eol(void)
2439 write1(Ceol); // Erase from cursor to end of line
2442 static void go_bottom_and_clear_to_eol(void)
2444 place_cursor(rows - 1, 0, FALSE); // go to bottom of screen
2445 clear_to_eol(); // erase to end of line
2448 //----- Erase from cursor to end of screen -----------------------
2449 static void clear_to_eos(void)
2451 write1(Ceos); // Erase from cursor to end of screen
2454 //----- Start standout mode ------------------------------------
2455 static void standout_start(void) // send "start reverse video" sequence
2457 write1(SOs); // Start reverse video mode
2460 //----- End standout mode --------------------------------------
2461 static void standout_end(void) // send "end reverse video" sequence
2463 write1(SOn); // End reverse video mode
2466 //----- Flash the screen --------------------------------------
2467 static void flash(int h)
2469 standout_start(); // send "start reverse video" sequence
2472 standout_end(); // send "end reverse video" sequence
2476 static void Indicate_Error(void)
2478 #if ENABLE_FEATURE_VI_CRASHME
2480 return; // generate a random command
2483 write1(bell); // send out a bell character
2489 //----- Screen[] Routines --------------------------------------
2490 //----- Erase the Screen[] memory ------------------------------
2491 static void screen_erase(void)
2493 memset(screen, ' ', screensize); // clear new screen
2496 static int bufsum(char *buf, int count)
2499 char *e = buf + count;
2502 sum += (unsigned char) *buf++;
2506 //----- Draw the status line at bottom of the screen -------------
2507 static void show_status_line(void)
2509 int cnt = 0, cksum = 0;
2511 // either we already have an error or status message, or we
2513 if (!have_status_msg) {
2514 cnt = format_edit_status();
2515 cksum = bufsum(status_buffer, cnt);
2517 if (have_status_msg || ((cnt > 0 && last_status_cksum != cksum))) {
2518 last_status_cksum = cksum; // remember if we have seen this line
2519 go_bottom_and_clear_to_eol();
2520 write1(status_buffer);
2521 if (have_status_msg) {
2522 if (((int)strlen(status_buffer) - (have_status_msg - 1)) >
2524 have_status_msg = 0;
2527 have_status_msg = 0;
2529 place_cursor(crow, ccol, FALSE); // put cursor back in correct place
2534 //----- format the status buffer, the bottom line of screen ------
2535 // format status buffer, with STANDOUT mode
2536 static void status_line_bold(const char *format, ...)
2540 va_start(args, format);
2541 strcpy(status_buffer, SOs); // Terminal standout mode on
2542 vsprintf(status_buffer + sizeof(SOs)-1, format, args);
2543 strcat(status_buffer, SOn); // Terminal standout mode off
2546 have_status_msg = 1 + sizeof(SOs) + sizeof(SOn) - 2;
2549 // format status buffer
2550 static void status_line(const char *format, ...)
2554 va_start(args, format);
2555 vsprintf(status_buffer, format, args);
2558 have_status_msg = 1;
2561 // copy s to buf, convert unprintable
2562 static void print_literal(char *buf, const char *s)
2575 c_is_no_print = (c & 0x80) && !Isprint(c);
2576 if (c_is_no_print) {
2580 if (c < ' ' || c == 127) {
2593 if (strlen(buf) > MAX_INPUT_LEN - 10) // paranoia
2598 static void not_implemented(const char *s)
2600 char buf[MAX_INPUT_LEN];
2602 print_literal(buf, s);
2603 status_line_bold("\'%s\' is not implemented", buf);
2606 // show file status on status line
2607 static int format_edit_status(void)
2609 static const char cmd_mode_indicator[] ALIGN1 = "-IR-";
2611 #define tot format_edit_status__tot
2613 int cur, percent, ret, trunc_at;
2615 // file_modified is now a counter rather than a flag. this
2616 // helps reduce the amount of line counting we need to do.
2617 // (this will cause a mis-reporting of modified status
2618 // once every MAXINT editing operations.)
2620 // it would be nice to do a similar optimization here -- if
2621 // we haven't done a motion that could have changed which line
2622 // we're on, then we shouldn't have to do this count_lines()
2623 cur = count_lines(text, dot);
2625 // reduce counting -- the total lines can't have
2626 // changed if we haven't done any edits.
2627 if (file_modified != last_file_modified) {
2628 tot = cur + count_lines(dot, end - 1) - 1;
2629 last_file_modified = file_modified;
2632 // current line percent
2633 // ------------- ~~ ----------
2636 percent = (100 * cur) / tot;
2642 trunc_at = columns < STATUS_BUFFER_LEN-1 ?
2643 columns : STATUS_BUFFER_LEN-1;
2645 ret = snprintf(status_buffer, trunc_at+1,
2646 #if ENABLE_FEATURE_VI_READONLY
2647 "%c %s%s%s %d/%d %d%%",
2649 "%c %s%s %d/%d %d%%",
2651 cmd_mode_indicator[cmd_mode & 3],
2652 (current_filename != NULL ? current_filename : "No file"),
2653 #if ENABLE_FEATURE_VI_READONLY
2654 (readonly_mode ? " [Readonly]" : ""),
2656 (file_modified ? " [Modified]" : ""),
2659 if (ret >= 0 && ret < trunc_at)
2660 return ret; /* it all fit */
2662 return trunc_at; /* had to truncate */
2666 //----- Force refresh of all Lines -----------------------------
2667 static void redraw(int full_screen)
2669 place_cursor(0, 0, FALSE); // put cursor in correct place
2670 clear_to_eos(); // tell terminal to erase display
2671 screen_erase(); // erase the internal screen buffer
2672 last_status_cksum = 0; // force status update
2673 refresh(full_screen); // this will redraw the entire display
2677 //----- Format a text[] line into a buffer ---------------------
2678 static char* format_line(char *src /*, int li*/)
2683 char *dest = scr_out_buf; // [MAX_SCR_COLS + MAX_TABSTOP * 2]
2685 c = '~'; // char in col 0 in non-existent lines is '~'
2687 while (co < columns + tabstop) {
2688 // have we gone past the end?
2693 if ((c & 0x80) && !Isprint(c)) {
2696 if (c < ' ' || c == 0x7f) {
2700 while ((co % tabstop) != (tabstop - 1)) {
2708 c += '@'; // Ctrl-X -> 'X'
2713 // discard scrolled-off-to-the-left portion,
2714 // in tabstop-sized pieces
2715 if (ofs >= tabstop && co >= tabstop) {
2716 memmove(dest, dest + tabstop, co);
2723 // check "short line, gigantic offset" case
2726 // discard last scrolled off part
2729 // fill the rest with spaces
2731 memset(&dest[co], ' ', columns - co);
2735 //----- Refresh the changed screen lines -----------------------
2736 // Copy the source line from text[] into the buffer and note
2737 // if the current screenline is different from the new buffer.
2738 // If they differ then that line needs redrawing on the terminal.
2740 static void refresh(int full_screen)
2742 #define old_offset refresh__old_offset
2745 char *tp, *sp; // pointer into text[] and screen[]
2747 if (ENABLE_FEATURE_VI_WIN_RESIZE) {
2748 unsigned c = columns, r = rows;
2749 get_terminal_width_height(0, &columns, &rows);
2750 if (rows > MAX_SCR_ROWS) rows = MAX_SCR_ROWS;
2751 if (columns > MAX_SCR_COLS) columns = MAX_SCR_COLS;
2752 full_screen |= (c - columns) | (r - rows);
2754 sync_cursor(dot, &crow, &ccol); // where cursor will be (on "dot")
2755 tp = screenbegin; // index into text[] of top line
2757 // compare text[] to screen[] and mark screen[] lines that need updating
2758 for (li = 0; li < rows - 1; li++) {
2759 int cs, ce; // column start & end
2761 // format current text line
2762 out_buf = format_line(tp /*, li*/);
2764 // skip to the end of the current text[] line
2766 char *t = memchr(tp, '\n', end - tp);
2767 if (!t) t = end - 1;
2771 // see if there are any changes between vitual screen and out_buf
2772 changed = FALSE; // assume no change
2775 sp = &screen[li * columns]; // start of screen line
2777 // force re-draw of every single column from 0 - columns-1
2780 // compare newly formatted buffer with virtual screen
2781 // look forward for first difference between buf and screen
2782 for (; cs <= ce; cs++) {
2783 if (out_buf[cs] != sp[cs]) {
2784 changed = TRUE; // mark for redraw
2789 // look backward for last difference between out_buf and screen
2790 for (; ce >= cs; ce--) {
2791 if (out_buf[ce] != sp[ce]) {
2792 changed = TRUE; // mark for redraw
2796 // now, cs is index of first diff, and ce is index of last diff
2798 // if horz offset has changed, force a redraw
2799 if (offset != old_offset) {
2804 // make a sanity check of columns indexes
2806 if (ce > columns - 1) ce = columns - 1;
2807 if (cs > ce) { cs = 0; ce = columns - 1; }
2808 // is there a change between vitual screen and out_buf
2810 // copy changed part of buffer to virtual screen
2811 memcpy(sp+cs, out_buf+cs, ce-cs+1);
2813 // move cursor to column of first change
2814 //if (offset != old_offset) {
2815 // // place_cursor is still too stupid
2816 // // to handle offsets correctly
2817 // place_cursor(li, cs, FALSE);
2819 place_cursor(li, cs, TRUE);
2822 // write line out to terminal
2823 fwrite(&sp[cs], ce - cs + 1, 1, stdout);
2827 place_cursor(crow, ccol, TRUE);
2829 old_offset = offset;
2833 //---------------------------------------------------------------------
2834 //----- the Ascii Chart -----------------------------------------------
2836 // 00 nul 01 soh 02 stx 03 etx 04 eot 05 enq 06 ack 07 bel
2837 // 08 bs 09 ht 0a nl 0b vt 0c np 0d cr 0e so 0f si
2838 // 10 dle 11 dc1 12 dc2 13 dc3 14 dc4 15 nak 16 syn 17 etb
2839 // 18 can 19 em 1a sub 1b esc 1c fs 1d gs 1e rs 1f us
2840 // 20 sp 21 ! 22 " 23 # 24 $ 25 % 26 & 27 '
2841 // 28 ( 29 ) 2a * 2b + 2c , 2d - 2e . 2f /
2842 // 30 0 31 1 32 2 33 3 34 4 35 5 36 6 37 7
2843 // 38 8 39 9 3a : 3b ; 3c < 3d = 3e > 3f ?
2844 // 40 @ 41 A 42 B 43 C 44 D 45 E 46 F 47 G
2845 // 48 H 49 I 4a J 4b K 4c L 4d M 4e N 4f O
2846 // 50 P 51 Q 52 R 53 S 54 T 55 U 56 V 57 W
2847 // 58 X 59 Y 5a Z 5b [ 5c \ 5d ] 5e ^ 5f _
2848 // 60 ` 61 a 62 b 63 c 64 d 65 e 66 f 67 g
2849 // 68 h 69 i 6a j 6b k 6c l 6d m 6e n 6f o
2850 // 70 p 71 q 72 r 73 s 74 t 75 u 76 v 77 w
2851 // 78 x 79 y 7a z 7b { 7c | 7d } 7e ~ 7f del
2852 //---------------------------------------------------------------------
2854 //----- Execute a Vi Command -----------------------------------
2855 static void do_cmd(int c)
2857 const char *msg = msg; // for compiler
2858 char *p, *q, *save_dot;
2860 int dir = dir; // for compiler
2864 // c1 = c; // quiet the compiler
2865 // cnt = yf = 0; // quiet the compiler
2866 // msg = p = q = save_dot = buf; // quiet the compiler
2867 memset(buf, '\0', 12);
2871 /* if this is a cursor key, skip these checks */
2879 case KEYCODE_PAGEUP:
2880 case KEYCODE_PAGEDOWN:
2881 case KEYCODE_DELETE:
2885 if (cmd_mode == 2) {
2886 // flip-flop Insert/Replace mode
2887 if (c == KEYCODE_INSERT)
2889 // we are 'R'eplacing the current *dot with new char
2891 // don't Replace past E-o-l
2892 cmd_mode = 1; // convert to insert
2894 if (1 <= c || Isprint(c)) {
2896 dot = yank_delete(dot, dot, 0, YANKDEL); // delete char
2897 dot = char_insert(dot, c); // insert new char
2902 if (cmd_mode == 1) {
2903 // hitting "Insert" twice means "R" replace mode
2904 if (c == KEYCODE_INSERT) goto dc5;
2905 // insert the char c at "dot"
2906 if (1 <= c || Isprint(c)) {
2907 dot = char_insert(dot, c);
2922 #if ENABLE_FEATURE_VI_CRASHME
2923 case 0x14: // dc4 ctrl-T
2924 crashme = (crashme == 0) ? 1 : 0;
2953 //case 'u': // u- FIXME- there is no undo
2955 default: // unrecognised command
2963 not_implemented(buf);
2964 end_cmd_q(); // stop adding to q
2965 case 0x00: // nul- ignore
2967 case 2: // ctrl-B scroll up full screen
2968 case KEYCODE_PAGEUP: // Cursor Key Page Up
2969 dot_scroll(rows - 2, -1);
2971 case 4: // ctrl-D scroll down half screen
2972 dot_scroll((rows - 2) / 2, 1);
2974 case 5: // ctrl-E scroll down one line
2977 case 6: // ctrl-F scroll down full screen
2978 case KEYCODE_PAGEDOWN: // Cursor Key Page Down
2979 dot_scroll(rows - 2, 1);
2981 case 7: // ctrl-G show current status
2982 last_status_cksum = 0; // force status update
2984 case 'h': // h- move left
2985 case KEYCODE_LEFT: // cursor key Left
2986 case 8: // ctrl-H- move left (This may be ERASE char)
2987 case 0x7f: // DEL- move left (This may be ERASE char)
2993 case 10: // Newline ^J
2994 case 'j': // j- goto next line, same col
2995 case KEYCODE_DOWN: // cursor key Down
2999 dot_next(); // go to next B-o-l
3000 dot = move_to_col(dot, ccol + offset); // try stay in same col
3002 case 12: // ctrl-L force redraw whole screen
3003 case 18: // ctrl-R force redraw
3004 place_cursor(0, 0, FALSE); // put cursor in correct place
3005 clear_to_eos(); // tel terminal to erase display
3007 screen_erase(); // erase the internal screen buffer
3008 last_status_cksum = 0; // force status update
3009 refresh(TRUE); // this will redraw the entire display
3011 case 13: // Carriage Return ^M
3012 case '+': // +- goto next line
3019 case 21: // ctrl-U scroll up half screen
3020 dot_scroll((rows - 2) / 2, -1);
3022 case 25: // ctrl-Y scroll up one line
3028 cmd_mode = 0; // stop insrting
3030 last_status_cksum = 0; // force status update
3032 case ' ': // move right
3033 case 'l': // move right
3034 case KEYCODE_RIGHT: // Cursor Key Right
3040 #if ENABLE_FEATURE_VI_YANKMARK
3041 case '"': // "- name a register to use for Delete/Yank
3042 c1 = (get_one_char() | 0x20) - 'a'; // | 0x20 is tolower()
3043 if ((unsigned)c1 <= 25) { // a-z?
3049 case '\'': // '- goto a specific mark
3050 c1 = (get_one_char() | 0x20) - 'a';
3051 if ((unsigned)c1 <= 25) { // a-z?
3054 if (text <= q && q < end) {
3056 dot_begin(); // go to B-o-l
3059 } else if (c1 == '\'') { // goto previous context
3060 dot = swap_context(dot); // swap current and previous context
3061 dot_begin(); // go to B-o-l
3067 case 'm': // m- Mark a line
3068 // this is really stupid. If there are any inserts or deletes
3069 // between text[0] and dot then this mark will not point to the
3070 // correct location! It could be off by many lines!
3071 // Well..., at least its quick and dirty.
3072 c1 = (get_one_char() | 0x20) - 'a';
3073 if ((unsigned)c1 <= 25) { // a-z?
3074 // remember the line
3080 case 'P': // P- Put register before
3081 case 'p': // p- put register after
3084 status_line_bold("Nothing in register %c", what_reg());
3087 // are we putting whole lines or strings
3088 if (strchr(p, '\n') != NULL) {
3090 dot_begin(); // putting lines- Put above
3093 // are we putting after very last line?
3094 if (end_line(dot) == (end - 1)) {
3095 dot = end; // force dot to end of text[]
3097 dot_next(); // next line, then put before
3102 dot_right(); // move to right, can move to NL
3104 dot = string_insert(dot, p); // insert the string
3105 end_cmd_q(); // stop adding to q
3107 case 'U': // U- Undo; replace current line with original version
3108 if (reg[Ureg] != 0) {
3109 p = begin_line(dot);
3111 p = text_hole_delete(p, q); // delete cur line
3112 p = string_insert(p, reg[Ureg]); // insert orig line
3117 #endif /* FEATURE_VI_YANKMARK */
3118 case '$': // $- goto end of line
3119 case KEYCODE_END: // Cursor Key End
3123 dot = end_line(dot);
3125 case '%': // %- find matching char of pair () [] {}
3126 for (q = dot; q < end && *q != '\n'; q++) {
3127 if (strchr("()[]{}", *q) != NULL) {
3128 // we found half of a pair
3129 p = find_pair(q, *q);
3141 case 'f': // f- forward to a user specified char
3142 last_forward_char = get_one_char(); // get the search char
3144 // dont separate these two commands. 'f' depends on ';'
3146 //**** fall through to ... ';'
3147 case ';': // ;- look at rest of line for last forward char
3151 if (last_forward_char == 0)
3154 while (q < end - 1 && *q != '\n' && *q != last_forward_char) {
3157 if (*q == last_forward_char)
3160 case ',': // repeat latest 'f' in opposite direction
3164 if (last_forward_char == 0)
3167 while (q >= text && *q != '\n' && *q != last_forward_char) {
3170 if (q >= text && *q == last_forward_char)
3174 case '-': // -- goto prev line
3181 #if ENABLE_FEATURE_VI_DOT_CMD
3182 case '.': // .- repeat the last modifying command
3183 // Stuff the last_modifying_cmd back into stdin
3184 // and let it be re-executed.
3186 last_modifying_cmd[lmc_len] = 0;
3187 ioq = ioq_start = xstrdup(last_modifying_cmd);
3191 #if ENABLE_FEATURE_VI_SEARCH
3192 case '?': // /- search for a pattern
3193 case '/': // /- search for a pattern
3196 q = get_input_line(buf); // get input line- use "status line"
3197 if (q[0] && !q[1]) {
3198 if (last_search_pattern[0])
3199 last_search_pattern[0] = c;
3200 goto dc3; // if no pat re-use old pat
3202 if (q[0]) { // strlen(q) > 1: new pat- save it and find
3203 // there is a new pat
3204 free(last_search_pattern);
3205 last_search_pattern = xstrdup(q);
3206 goto dc3; // now find the pattern
3208 // user changed mind and erased the "/"- do nothing
3210 case 'N': // N- backward search for last pattern
3214 dir = BACK; // assume BACKWARD search
3216 if (last_search_pattern[0] == '?') {
3220 goto dc4; // now search for pattern
3222 case 'n': // n- repeat search for last pattern
3223 // search rest of text[] starting at next char
3224 // if search fails return orignal "p" not the "p+1" address
3229 if (last_search_pattern == 0) {
3230 msg = "No previous regular expression";
3233 if (last_search_pattern[0] == '/') {
3234 dir = FORWARD; // assume FORWARD search
3237 if (last_search_pattern[0] == '?') {
3242 q = char_search(p, last_search_pattern + 1, dir, FULL);
3244 dot = q; // good search, update "dot"
3248 // no pattern found between "dot" and "end"- continue at top
3253 q = char_search(p, last_search_pattern + 1, dir, FULL);
3254 if (q != NULL) { // found something
3255 dot = q; // found new pattern- goto it
3256 msg = "search hit BOTTOM, continuing at TOP";
3258 msg = "search hit TOP, continuing at BOTTOM";
3261 msg = "Pattern not found";
3265 status_line_bold("%s", msg);
3267 case '{': // {- move backward paragraph
3268 q = char_search(dot, "\n\n", BACK, FULL);
3269 if (q != NULL) { // found blank line
3270 dot = next_line(q); // move to next blank line
3273 case '}': // }- move forward paragraph
3274 q = char_search(dot, "\n\n", FORWARD, FULL);
3275 if (q != NULL) { // found blank line
3276 dot = next_line(q); // move to next blank line
3279 #endif /* FEATURE_VI_SEARCH */
3280 case '0': // 0- goto begining of line
3290 if (c == '0' && cmdcnt < 1) {
3291 dot_begin(); // this was a standalone zero
3293 cmdcnt = cmdcnt * 10 + (c - '0'); // this 0 is part of a number
3296 case ':': // :- the colon mode commands
3297 p = get_input_line(":"); // get input line- use "status line"
3298 #if ENABLE_FEATURE_VI_COLON
3299 colon(p); // execute the command
3302 p++; // move past the ':'
3306 if (strncasecmp(p, "quit", cnt) == 0
3307 || strncasecmp(p, "q!", cnt) == 0 // delete lines
3309 if (file_modified && p[1] != '!') {
3310 status_line_bold("No write since last change (:quit! overrides)");
3314 } else if (strncasecmp(p, "write", cnt) == 0
3315 || strncasecmp(p, "wq", cnt) == 0
3316 || strncasecmp(p, "wn", cnt) == 0
3317 || strncasecmp(p, "x", cnt) == 0
3319 cnt = file_write(current_filename, text, end - 1);
3322 status_line_bold("Write error: %s", strerror(errno));
3325 last_file_modified = -1;
3326 status_line("\"%s\" %dL, %dC", current_filename, count_lines(text, end - 1), cnt);
3327 if (p[0] == 'x' || p[1] == 'q' || p[1] == 'n'
3328 || p[0] == 'X' || p[1] == 'Q' || p[1] == 'N'
3333 } else if (strncasecmp(p, "file", cnt) == 0) {
3334 last_status_cksum = 0; // force status update
3335 } else if (sscanf(p, "%d", &j) > 0) {
3336 dot = find_line(j); // go to line # j
3338 } else { // unrecognised cmd
3341 #endif /* !FEATURE_VI_COLON */
3343 case '<': // <- Left shift something
3344 case '>': // >- Right shift something
3345 cnt = count_lines(text, dot); // remember what line we are on
3346 c1 = get_one_char(); // get the type of thing to delete
3347 find_range(&p, &q, c1);
3348 yank_delete(p, q, 1, YANKONLY); // save copy before change
3351 i = count_lines(p, q); // # of lines we are shifting
3352 for ( ; i > 0; i--, p = next_line(p)) {
3354 // shift left- remove tab or 8 spaces
3356 // shrink buffer 1 char
3357 text_hole_delete(p, p);
3358 } else if (*p == ' ') {
3359 // we should be calculating columns, not just SPACE
3360 for (j = 0; *p == ' ' && j < tabstop; j++) {
3361 text_hole_delete(p, p);
3364 } else if (c == '>') {
3365 // shift right -- add tab or 8 spaces
3366 char_insert(p, '\t');
3369 dot = find_line(cnt); // what line were we on
3371 end_cmd_q(); // stop adding to q
3373 case 'A': // A- append at e-o-l
3374 dot_end(); // go to e-o-l
3375 //**** fall through to ... 'a'
3376 case 'a': // a- append after current char
3381 case 'B': // B- back a blank-delimited Word
3382 case 'E': // E- end of a blank-delimited word
3383 case 'W': // W- forward a blank-delimited word
3390 if (c == 'W' || isspace(dot[dir])) {
3391 dot = skip_thing(dot, 1, dir, S_TO_WS);
3392 dot = skip_thing(dot, 2, dir, S_OVER_WS);
3395 dot = skip_thing(dot, 1, dir, S_BEFORE_WS);
3397 case 'C': // C- Change to e-o-l
3398 case 'D': // D- delete to e-o-l
3400 dot = dollar_line(dot); // move to before NL
3401 // copy text into a register and delete
3402 dot = yank_delete(save_dot, dot, 0, YANKDEL); // delete to e-o-l
3404 goto dc_i; // start inserting
3405 #if ENABLE_FEATURE_VI_DOT_CMD
3407 end_cmd_q(); // stop adding to q
3410 case 'g': // 'gg' goto a line number (vim) (default: very first line)
3411 c1 = get_one_char();
3414 buf[1] = c1; // TODO: if Unicode?
3416 not_implemented(buf);
3422 case 'G': // G- goto to a line number (default= E-O-F)
3423 dot = end - 1; // assume E-O-F
3425 dot = find_line(cmdcnt); // what line is #cmdcnt
3429 case 'H': // H- goto top line on screen
3431 if (cmdcnt > (rows - 1)) {
3432 cmdcnt = (rows - 1);
3439 case 'I': // I- insert before first non-blank
3442 //**** fall through to ... 'i'
3443 case 'i': // i- insert before current char
3444 case KEYCODE_INSERT: // Cursor Key Insert
3446 cmd_mode = 1; // start insrting
3448 case 'J': // J- join current and next lines together
3452 dot_end(); // move to NL
3453 if (dot < end - 1) { // make sure not last char in text[]
3454 *dot++ = ' '; // replace NL with space
3456 while (isblank(*dot)) { // delete leading WS
3460 end_cmd_q(); // stop adding to q
3462 case 'L': // L- goto bottom line on screen
3464 if (cmdcnt > (rows - 1)) {
3465 cmdcnt = (rows - 1);
3473 case 'M': // M- goto middle line on screen
3475 for (cnt = 0; cnt < (rows-1) / 2; cnt++)
3476 dot = next_line(dot);
3478 case 'O': // O- open a empty line above
3480 p = begin_line(dot);
3481 if (p[-1] == '\n') {
3483 case 'o': // o- open a empty line below; Yes, I know it is in the middle of the "if (..."
3485 dot = char_insert(dot, '\n');
3488 dot = char_insert(dot, '\n'); // i\n ESC
3493 case 'R': // R- continuous Replace char
3497 case KEYCODE_DELETE:
3500 case 'X': // X- delete char before dot
3501 case 'x': // x- delete the current char
3502 case 's': // s- substitute the current char
3509 if (dot[dir] != '\n') {
3511 dot--; // delete prev char
3512 dot = yank_delete(dot, dot, 0, YANKDEL); // delete char
3515 goto dc_i; // start insrting
3516 end_cmd_q(); // stop adding to q
3518 case 'Z': // Z- if modified, {write}; exit
3519 // ZZ means to save file (if necessary), then exit
3520 c1 = get_one_char();
3525 if (file_modified) {
3526 if (ENABLE_FEATURE_VI_READONLY && readonly_mode) {
3527 status_line_bold("\"%s\" File is read only", current_filename);
3530 cnt = file_write(current_filename, text, end - 1);
3533 status_line_bold("Write error: %s", strerror(errno));
3534 } else if (cnt == (end - 1 - text + 1)) {
3541 case '^': // ^- move to first non-blank on line
3545 case 'b': // b- back a word
3546 case 'e': // e- end of word
3553 if ((dot + dir) < text || (dot + dir) > end - 1)
3556 if (isspace(*dot)) {
3557 dot = skip_thing(dot, (c == 'e') ? 2 : 1, dir, S_OVER_WS);
3559 if (isalnum(*dot) || *dot == '_') {
3560 dot = skip_thing(dot, 1, dir, S_END_ALNUM);
3561 } else if (ispunct(*dot)) {
3562 dot = skip_thing(dot, 1, dir, S_END_PUNCT);
3565 case 'c': // c- change something
3566 case 'd': // d- delete something
3567 #if ENABLE_FEATURE_VI_YANKMARK
3568 case 'y': // y- yank something
3569 case 'Y': // Y- Yank a line
3572 int yf, ml, whole = 0;
3573 yf = YANKDEL; // assume either "c" or "d"
3574 #if ENABLE_FEATURE_VI_YANKMARK
3575 if (c == 'y' || c == 'Y')
3580 c1 = get_one_char(); // get the type of thing to delete
3581 // determine range, and whether it spans lines
3582 ml = find_range(&p, &q, c1);
3583 if (c1 == 27) { // ESC- user changed mind and wants out
3584 c = c1 = 27; // Escape- do nothing
3585 } else if (strchr("wW", c1)) {
3587 // don't include trailing WS as part of word
3588 while (isblank(*q)) {
3589 if (q <= text || q[-1] == '\n')
3594 dot = yank_delete(p, q, ml, yf); // delete word
3595 } else if (strchr("^0bBeEft%$ lh\b\177", c1)) {
3596 // partial line copy text into a register and delete
3597 dot = yank_delete(p, q, ml, yf); // delete word
3598 } else if (strchr("cdykjHL+-{}\r\n", c1)) {
3599 // whole line copy text into a register and delete
3600 dot = yank_delete(p, q, ml, yf); // delete lines
3603 // could not recognize object
3604 c = c1 = 27; // error-
3610 dot = char_insert(dot, '\n');
3611 // on the last line of file don't move to prev line
3612 if (whole && dot != (end-1)) {
3615 } else if (c == 'd') {
3621 // if CHANGING, not deleting, start inserting after the delete
3623 strcpy(buf, "Change");
3624 goto dc_i; // start inserting
3627 strcpy(buf, "Delete");
3629 #if ENABLE_FEATURE_VI_YANKMARK
3630 if (c == 'y' || c == 'Y') {
3631 strcpy(buf, "Yank");
3635 for (cnt = 0; p <= q; p++) {
3639 status_line("%s %d lines (%d chars) using [%c]",
3640 buf, cnt, strlen(reg[YDreg]), what_reg());
3642 end_cmd_q(); // stop adding to q
3646 case 'k': // k- goto prev line, same col
3647 case KEYCODE_UP: // cursor key Up
3652 dot = move_to_col(dot, ccol + offset); // try stay in same col
3654 case 'r': // r- replace the current char with user input
3655 c1 = get_one_char(); // get the replacement char
3660 end_cmd_q(); // stop adding to q
3662 case 't': // t- move to char prior to next x
3663 last_forward_char = get_one_char();
3665 if (*dot == last_forward_char)
3667 last_forward_char = 0;
3669 case 'w': // w- forward a word
3673 if (isalnum(*dot) || *dot == '_') { // we are on ALNUM
3674 dot = skip_thing(dot, 1, FORWARD, S_END_ALNUM);
3675 } else if (ispunct(*dot)) { // we are on PUNCT
3676 dot = skip_thing(dot, 1, FORWARD, S_END_PUNCT);
3679 dot++; // move over word
3680 if (isspace(*dot)) {
3681 dot = skip_thing(dot, 2, FORWARD, S_OVER_WS);
3685 c1 = get_one_char(); // get the replacement char
3688 cnt = (rows - 2) / 2; // put dot at center
3690 cnt = rows - 2; // put dot at bottom
3691 screenbegin = begin_line(dot); // start dot at top
3692 dot_scroll(cnt, -1);
3694 case '|': // |- move to column "cmdcnt"
3695 dot = move_to_col(dot, cmdcnt - 1); // try to move to column
3697 case '~': // ~- flip the case of letters a-z -> A-Z
3701 if (islower(*dot)) {
3702 *dot = toupper(*dot);
3704 } else if (isupper(*dot)) {
3705 *dot = tolower(*dot);
3709 end_cmd_q(); // stop adding to q
3711 //----- The Cursor and Function Keys -----------------------------
3712 case KEYCODE_HOME: // Cursor Key Home
3715 // The Fn keys could point to do_macro which could translate them
3717 case KEYCODE_FUN1: // Function Key F1
3718 case KEYCODE_FUN2: // Function Key F2
3719 case KEYCODE_FUN3: // Function Key F3
3720 case KEYCODE_FUN4: // Function Key F4
3721 case KEYCODE_FUN5: // Function Key F5
3722 case KEYCODE_FUN6: // Function Key F6
3723 case KEYCODE_FUN7: // Function Key F7
3724 case KEYCODE_FUN8: // Function Key F8
3725 case KEYCODE_FUN9: // Function Key F9
3726 case KEYCODE_FUN10: // Function Key F10
3727 case KEYCODE_FUN11: // Function Key F11
3728 case KEYCODE_FUN12: // Function Key F12
3734 // if text[] just became empty, add back an empty line
3736 char_insert(text, '\n'); // start empty buf with dummy line
3739 // it is OK for dot to exactly equal to end, otherwise check dot validity
3741 dot = bound_dot(dot); // make sure "dot" is valid
3743 #if ENABLE_FEATURE_VI_YANKMARK
3744 check_context(c); // update the current context
3748 cmdcnt = 0; // cmd was not a number, reset cmdcnt
3749 cnt = dot - begin_line(dot);
3750 // Try to stay off of the Newline
3751 if (*dot == '\n' && cnt > 0 && cmd_mode == 0)
3755 /* NB! the CRASHME code is unmaintained, and doesn't currently build */
3756 #if ENABLE_FEATURE_VI_CRASHME
3757 static int totalcmds = 0;
3758 static int Mp = 85; // Movement command Probability
3759 static int Np = 90; // Non-movement command Probability
3760 static int Dp = 96; // Delete command Probability
3761 static int Ip = 97; // Insert command Probability
3762 static int Yp = 98; // Yank command Probability
3763 static int Pp = 99; // Put command Probability
3764 static int M = 0, N = 0, I = 0, D = 0, Y = 0, P = 0, U = 0;
3765 static const char chars[20] = "\t012345 abcdABCD-=.$";
3766 static const char *const words[20] = {
3767 "this", "is", "a", "test",
3768 "broadcast", "the", "emergency", "of",
3769 "system", "quick", "brown", "fox",
3770 "jumped", "over", "lazy", "dogs",
3771 "back", "January", "Febuary", "March"
3773 static const char *const lines[20] = {
3774 "You should have received a copy of the GNU General Public License\n",
3775 "char c, cm, *cmd, *cmd1;\n",
3776 "generate a command by percentages\n",
3777 "Numbers may be typed as a prefix to some commands.\n",
3778 "Quit, discarding changes!\n",
3779 "Forced write, if permission originally not valid.\n",
3780 "In general, any ex or ed command (such as substitute or delete).\n",
3781 "I have tickets available for the Blazers vs LA Clippers for Monday, Janurary 1 at 1:00pm.\n",
3782 "Please get w/ me and I will go over it with you.\n",
3783 "The following is a list of scheduled, committed changes.\n",
3784 "1. Launch Norton Antivirus (Start, Programs, Norton Antivirus)\n",
3785 "Reminder....Town Meeting in Central Perk cafe today at 3:00pm.\n",
3786 "Any question about transactions please contact Sterling Huxley.\n",
3787 "I will try to get back to you by Friday, December 31.\n",
3788 "This Change will be implemented on Friday.\n",
3789 "Let me know if you have problems accessing this;\n",
3790 "Sterling Huxley recently added you to the access list.\n",
3791 "Would you like to go to lunch?\n",
3792 "The last command will be automatically run.\n",
3793 "This is too much english for a computer geek.\n",
3795 static char *multilines[20] = {
3796 "You should have received a copy of the GNU General Public License\n",
3797 "char c, cm, *cmd, *cmd1;\n",
3798 "generate a command by percentages\n",
3799 "Numbers may be typed as a prefix to some commands.\n",
3800 "Quit, discarding changes!\n",
3801 "Forced write, if permission originally not valid.\n",
3802 "In general, any ex or ed command (such as substitute or delete).\n",
3803 "I have tickets available for the Blazers vs LA Clippers for Monday, Janurary 1 at 1:00pm.\n",
3804 "Please get w/ me and I will go over it with you.\n",
3805 "The following is a list of scheduled, committed changes.\n",
3806 "1. Launch Norton Antivirus (Start, Programs, Norton Antivirus)\n",
3807 "Reminder....Town Meeting in Central Perk cafe today at 3:00pm.\n",
3808 "Any question about transactions please contact Sterling Huxley.\n",
3809 "I will try to get back to you by Friday, December 31.\n",
3810 "This Change will be implemented on Friday.\n",
3811 "Let me know if you have problems accessing this;\n",
3812 "Sterling Huxley recently added you to the access list.\n",
3813 "Would you like to go to lunch?\n",
3814 "The last command will be automatically run.\n",
3815 "This is too much english for a computer geek.\n",
3818 // create a random command to execute
3819 static void crash_dummy()
3821 static int sleeptime; // how long to pause between commands
3822 char c, cm, *cmd, *cmd1;
3823 int i, cnt, thing, rbi, startrbi, percent;
3825 // "dot" movement commands
3826 cmd1 = " \n\r\002\004\005\006\025\0310^$-+wWeEbBhjklHL";
3828 // is there already a command running?
3829 if (chars_to_parse > 0)
3833 sleeptime = 0; // how long to pause between commands
3834 memset(readbuffer, '\0', sizeof(readbuffer));
3835 // generate a command by percentages
3836 percent = (int) lrand48() % 100; // get a number from 0-99
3837 if (percent < Mp) { // Movement commands
3838 // available commands
3841 } else if (percent < Np) { // non-movement commands
3842 cmd = "mz<>\'\""; // available commands
3844 } else if (percent < Dp) { // Delete commands
3845 cmd = "dx"; // available commands
3847 } else if (percent < Ip) { // Inset commands
3848 cmd = "iIaAsrJ"; // available commands
3850 } else if (percent < Yp) { // Yank commands
3851 cmd = "yY"; // available commands
3853 } else if (percent < Pp) { // Put commands
3854 cmd = "pP"; // available commands
3857 // We do not know how to handle this command, try again
3861 // randomly pick one of the available cmds from "cmd[]"
3862 i = (int) lrand48() % strlen(cmd);
3864 if (strchr(":\024", cm))
3865 goto cd0; // dont allow colon or ctrl-T commands
3866 readbuffer[rbi++] = cm; // put cmd into input buffer
3868 // now we have the command-
3869 // there are 1, 2, and multi char commands
3870 // find out which and generate the rest of command as necessary
3871 if (strchr("dmryz<>\'\"", cm)) { // 2-char commands
3872 cmd1 = " \n\r0$^-+wWeEbBhjklHL";
3873 if (cm == 'm' || cm == '\'' || cm == '\"') { // pick a reg[]
3874 cmd1 = "abcdefghijklmnopqrstuvwxyz";
3876 thing = (int) lrand48() % strlen(cmd1); // pick a movement command
3878 readbuffer[rbi++] = c; // add movement to input buffer
3880 if (strchr("iIaAsc", cm)) { // multi-char commands
3882 // change some thing
3883 thing = (int) lrand48() % strlen(cmd1); // pick a movement command
3885 readbuffer[rbi++] = c; // add movement to input buffer
3887 thing = (int) lrand48() % 4; // what thing to insert
3888 cnt = (int) lrand48() % 10; // how many to insert
3889 for (i = 0; i < cnt; i++) {
3890 if (thing == 0) { // insert chars
3891 readbuffer[rbi++] = chars[((int) lrand48() % strlen(chars))];
3892 } else if (thing == 1) { // insert words
3893 strcat(readbuffer, words[(int) lrand48() % 20]);
3894 strcat(readbuffer, " ");
3895 sleeptime = 0; // how fast to type
3896 } else if (thing == 2) { // insert lines
3897 strcat(readbuffer, lines[(int) lrand48() % 20]);
3898 sleeptime = 0; // how fast to type
3899 } else { // insert multi-lines
3900 strcat(readbuffer, multilines[(int) lrand48() % 20]);
3901 sleeptime = 0; // how fast to type
3904 strcat(readbuffer, "\033");
3906 chars_to_parse = strlen(readbuffer);
3910 mysleep(sleeptime); // sleep 1/100 sec
3913 // test to see if there are any errors
3914 static void crash_test()
3916 static time_t oldtim;
3923 strcat(msg, "end<text ");
3925 if (end > textend) {
3926 strcat(msg, "end>textend ");
3929 strcat(msg, "dot<text ");
3932 strcat(msg, "dot>end ");
3934 if (screenbegin < text) {
3935 strcat(msg, "screenbegin<text ");
3937 if (screenbegin > end - 1) {
3938 strcat(msg, "screenbegin>end-1 ");
3942 printf("\n\n%d: \'%c\' %s\n\n\n%s[Hit return to continue]%s",
3943 totalcmds, last_input_char, msg, SOs, SOn);
3945 while (safe_read(STDIN_FILENO, d, 1) > 0) {
3946 if (d[0] == '\n' || d[0] == '\r')
3951 if (tim >= (oldtim + 3)) {
3952 sprintf(status_buffer,
3953 "Tot=%d: M=%d N=%d I=%d D=%d Y=%d P=%d U=%d size=%d",
3954 totalcmds, M, N, I, D, Y, P, U, end - text + 1);