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 // Misc. non-Ascii keys that report an escape sequence
61 #define VI_K_UP (char)128 // cursor key Up
62 #define VI_K_DOWN (char)129 // cursor key Down
63 #define VI_K_RIGHT (char)130 // Cursor Key Right
64 #define VI_K_LEFT (char)131 // cursor key Left
65 #define VI_K_HOME (char)132 // Cursor Key Home
66 #define VI_K_END (char)133 // Cursor Key End
67 #define VI_K_INSERT (char)134 // Cursor Key Insert
68 #define VI_K_DELETE (char)135 // Cursor Key Insert
69 #define VI_K_PAGEUP (char)136 // Cursor Key Page Up
70 #define VI_K_PAGEDOWN (char)137 // Cursor Key Page Down
71 #define VI_K_FUN1 (char)138 // Function Key F1
72 #define VI_K_FUN2 (char)139 // Function Key F2
73 #define VI_K_FUN3 (char)140 // Function Key F3
74 #define VI_K_FUN4 (char)141 // Function Key F4
75 #define VI_K_FUN5 (char)142 // Function Key F5
76 #define VI_K_FUN6 (char)143 // Function Key F6
77 #define VI_K_FUN7 (char)144 // Function Key F7
78 #define VI_K_FUN8 (char)145 // Function Key F8
79 #define VI_K_FUN9 (char)146 // Function Key F9
80 #define VI_K_FUN10 (char)147 // Function Key F10
81 #define VI_K_FUN11 (char)148 // Function Key F11
82 #define VI_K_FUN12 (char)149 // Function Key F12
84 /* vt102 typical ESC sequence */
85 /* terminal standout start/normal ESC sequence */
86 static const char SOs[] ALIGN1 = "\033[7m";
87 static const char SOn[] ALIGN1 = "\033[0m";
88 /* terminal bell sequence */
89 static const char bell[] ALIGN1 = "\007";
90 /* Clear-end-of-line and Clear-end-of-screen ESC sequence */
91 static const char Ceol[] ALIGN1 = "\033[0K";
92 static const char Ceos[] ALIGN1 = "\033[0J";
93 /* Cursor motion arbitrary destination ESC sequence */
94 static const char CMrc[] ALIGN1 = "\033[%d;%dH";
95 /* Cursor motion up and down ESC sequence */
96 static const char CMup[] ALIGN1 = "\033[A";
97 static const char CMdown[] ALIGN1 = "\n";
103 FORWARD = 1, // code depends on "1" for array index
104 BACK = -1, // code depends on "-1" for array index
105 LIMITED = 0, // how much of text[] in char_search
106 FULL = 1, // how much of text[] in char_search
108 S_BEFORE_WS = 1, // used in skip_thing() for moving "dot"
109 S_TO_WS = 2, // used in skip_thing() for moving "dot"
110 S_OVER_WS = 3, // used in skip_thing() for moving "dot"
111 S_END_PUNCT = 4, // used in skip_thing() for moving "dot"
112 S_END_ALNUM = 5, // used in skip_thing() for moving "dot"
116 /* vi.c expects chars to be unsigned. */
117 /* busybox build system provides that, but it's better */
118 /* to audit and fix the source */
121 /* many references - keep near the top of globals */
122 char *text, *end; // pointers to the user data in memory
123 char *dot; // where all the action takes place
124 int text_size; // size of the allocated buffer
128 #define VI_AUTOINDENT 1
129 #define VI_SHOWMATCH 2
130 #define VI_IGNORECASE 4
131 #define VI_ERR_METHOD 8
132 #define autoindent (vi_setops & VI_AUTOINDENT)
133 #define showmatch (vi_setops & VI_SHOWMATCH )
134 #define ignorecase (vi_setops & VI_IGNORECASE)
135 /* indicate error with beep or flash */
136 #define err_method (vi_setops & VI_ERR_METHOD)
138 #if ENABLE_FEATURE_VI_READONLY
139 smallint readonly_mode;
140 #define SET_READONLY_FILE(flags) ((flags) |= 0x01)
141 #define SET_READONLY_MODE(flags) ((flags) |= 0x02)
142 #define UNSET_READONLY_FILE(flags) ((flags) &= 0xfe)
144 #define SET_READONLY_FILE(flags) ((void)0)
145 #define SET_READONLY_MODE(flags) ((void)0)
146 #define UNSET_READONLY_FILE(flags) ((void)0)
149 smallint editing; // >0 while we are editing a file
150 // [code audit says "can be 0, 1 or 2 only"]
151 smallint cmd_mode; // 0=command 1=insert 2=replace
152 int file_modified; // buffer contents changed (counter, not flag!)
153 int last_file_modified; // = -1;
154 int fn_start; // index of first cmd line file name
155 int save_argc; // how many file names on cmd line
156 int cmdcnt; // repetition count
157 unsigned rows, columns; // the terminal screen is this size
158 int crow, ccol; // cursor is on Crow x Ccol
159 int offset; // chars scrolled off the screen to the left
160 int have_status_msg; // is default edit status needed?
161 // [don't make smallint!]
162 int last_status_cksum; // hash of current status line
163 char *current_filename;
164 char *screenbegin; // index into text[], of top line on the screen
165 char *screen; // pointer to the virtual screen buffer
166 int screensize; // and its size
168 char erase_char; // the users erase character
169 char last_input_char; // last char read from user
170 char last_forward_char; // last char searched for with 'f'
172 #if ENABLE_FEATURE_VI_DOT_CMD
173 smallint adding2q; // are we currently adding user input to q
174 int lmc_len; // length of last_modifying_cmd
175 char *ioq, *ioq_start; // pointer to string for get_one_char to "read"
177 #if ENABLE_FEATURE_VI_OPTIMIZE_CURSOR
178 int last_row; // where the cursor was last moved to
180 #if ENABLE_FEATURE_VI_USE_SIGNALS || ENABLE_FEATURE_VI_CRASHME
183 #if ENABLE_FEATURE_VI_DOT_CMD || ENABLE_FEATURE_VI_YANKMARK
184 char *modifying_cmds; // cmds that modify text[]
186 #if ENABLE_FEATURE_VI_SEARCH
187 char *last_search_pattern; // last pattern from a '/' or '?' search
191 #if ENABLE_FEATURE_VI_YANKMARK
192 char *edit_file__cur_line;
194 int refresh__old_offset;
195 int format_edit_status__tot;
197 /* a few references only */
198 #if ENABLE_FEATURE_VI_YANKMARK
199 int YDreg, Ureg; // default delete register and orig line for "U"
200 char *reg[28]; // named register a-z, "D", and "U" 0-25,26,27
201 char *mark[28]; // user marks points somewhere in text[]- a-z and previous context ''
202 char *context_start, *context_end;
204 #if ENABLE_FEATURE_VI_USE_SIGNALS
205 sigjmp_buf restart; // catch_sig()
207 struct termios term_orig, term_vi; // remember what the cooked mode was
208 #if ENABLE_FEATURE_VI_COLON
209 char *initial_cmds[3]; // currently 2 entries, NULL terminated
211 // Should be just enough to hold a key sequence,
212 // but CRASME mode uses it as generated command buffer too
214 #define STATUS_BUFFER_LEN 200
215 char status_buffer[STATUS_BUFFER_LEN]; // messages to the user
216 #if ENABLE_FEATURE_VI_DOT_CMD
217 char last_modifying_cmd[MAX_INPUT_LEN]; // last modifying cmd for "."
219 char get_input_line__buf[MAX_INPUT_LEN]; /* former static */
221 char scr_out_buf[MAX_SCR_COLS + MAX_TABSTOP * 2];
223 #define G (*ptr_to_globals)
224 #define text (G.text )
225 #define text_size (G.text_size )
230 #define vi_setops (G.vi_setops )
231 #define editing (G.editing )
232 #define cmd_mode (G.cmd_mode )
233 #define file_modified (G.file_modified )
234 #define last_file_modified (G.last_file_modified )
235 #define fn_start (G.fn_start )
236 #define save_argc (G.save_argc )
237 #define cmdcnt (G.cmdcnt )
238 #define rows (G.rows )
239 #define columns (G.columns )
240 #define crow (G.crow )
241 #define ccol (G.ccol )
242 #define offset (G.offset )
243 #define status_buffer (G.status_buffer )
244 #define have_status_msg (G.have_status_msg )
245 #define last_status_cksum (G.last_status_cksum )
246 #define current_filename (G.current_filename )
247 #define screen (G.screen )
248 #define screensize (G.screensize )
249 #define screenbegin (G.screenbegin )
250 #define tabstop (G.tabstop )
251 #define erase_char (G.erase_char )
252 #define last_input_char (G.last_input_char )
253 #define last_forward_char (G.last_forward_char )
254 #if ENABLE_FEATURE_VI_READONLY
255 #define readonly_mode (G.readonly_mode )
257 #define readonly_mode 0
259 #define adding2q (G.adding2q )
260 #define lmc_len (G.lmc_len )
262 #define ioq_start (G.ioq_start )
263 #define last_row (G.last_row )
264 #define my_pid (G.my_pid )
265 #define modifying_cmds (G.modifying_cmds )
266 #define last_search_pattern (G.last_search_pattern)
267 #define chars_to_parse (G.chars_to_parse )
269 #define edit_file__cur_line (G.edit_file__cur_line)
270 #define refresh__old_offset (G.refresh__old_offset)
271 #define format_edit_status__tot (G.format_edit_status__tot)
273 #define YDreg (G.YDreg )
274 #define Ureg (G.Ureg )
275 #define mark (G.mark )
276 #define context_start (G.context_start )
277 #define context_end (G.context_end )
278 #define restart (G.restart )
279 #define term_orig (G.term_orig )
280 #define term_vi (G.term_vi )
281 #define initial_cmds (G.initial_cmds )
282 #define readbuffer (G.readbuffer )
283 #define scr_out_buf (G.scr_out_buf )
284 #define last_modifying_cmd (G.last_modifying_cmd )
285 #define get_input_line__buf (G.get_input_line__buf)
287 #define INIT_G() do { \
288 SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \
289 last_file_modified = -1; \
293 static int init_text_buffer(char *); // init from file or create new
294 static void edit_file(char *); // edit one file
295 static void do_cmd(char); // execute a command
296 static int next_tabstop(int);
297 static void sync_cursor(char *, int *, int *); // synchronize the screen cursor to dot
298 static char *begin_line(char *); // return pointer to cur line B-o-l
299 static char *end_line(char *); // return pointer to cur line E-o-l
300 static char *prev_line(char *); // return pointer to prev line B-o-l
301 static char *next_line(char *); // return pointer to next line B-o-l
302 static char *end_screen(void); // get pointer to last char on screen
303 static int count_lines(char *, char *); // count line from start to stop
304 static char *find_line(int); // find begining of line #li
305 static char *move_to_col(char *, int); // move "p" to column l
306 static void dot_left(void); // move dot left- dont leave line
307 static void dot_right(void); // move dot right- dont leave line
308 static void dot_begin(void); // move dot to B-o-l
309 static void dot_end(void); // move dot to E-o-l
310 static void dot_next(void); // move dot to next line B-o-l
311 static void dot_prev(void); // move dot to prev line B-o-l
312 static void dot_scroll(int, int); // move the screen up or down
313 static void dot_skip_over_ws(void); // move dot pat WS
314 static void dot_delete(void); // delete the char at 'dot'
315 static char *bound_dot(char *); // make sure text[0] <= P < "end"
316 static char *new_screen(int, int); // malloc virtual screen memory
317 static char *char_insert(char *, char); // insert the char c at 'p'
318 static char *stupid_insert(char *, char); // stupidly insert the char c at 'p'
319 static int find_range(char **, char **, char); // return pointers for an object
320 static int st_test(char *, int, int, char *); // helper for skip_thing()
321 static char *skip_thing(char *, int, int, int); // skip some object
322 static char *find_pair(char *, char); // find matching pair () [] {}
323 static char *text_hole_delete(char *, char *); // at "p", delete a 'size' byte hole
324 static char *text_hole_make(char *, int); // at "p", make a 'size' byte hole
325 static char *yank_delete(char *, char *, int, int); // yank text[] into register then delete
326 static void show_help(void); // display some help info
327 static void rawmode(void); // set "raw" mode on tty
328 static void cookmode(void); // return to "cooked" mode on tty
329 // sleep for 'h' 1/100 seconds, return 1/0 if stdin is (ready for read)/(not ready)
330 static int mysleep(int);
331 static char readit(void); // read (maybe cursor) key from stdin
332 static char get_one_char(void); // read 1 char from stdin
333 static int file_size(const char *); // what is the byte size of "fn"
334 #if ENABLE_FEATURE_VI_READONLY
335 static int file_insert(const char *, char *, int);
337 static int file_insert(const char *, char *);
339 static int file_write(char *, char *, char *);
340 #if !ENABLE_FEATURE_VI_OPTIMIZE_CURSOR
341 #define place_cursor(a, b, optimize) place_cursor(a, b)
343 static void place_cursor(int, int, int);
344 static void screen_erase(void);
345 static void clear_to_eol(void);
346 static void clear_to_eos(void);
347 static void standout_start(void); // send "start reverse video" sequence
348 static void standout_end(void); // send "end reverse video" sequence
349 static void flash(int); // flash the terminal screen
350 static void show_status_line(void); // put a message on the bottom line
351 static void status_line(const char *, ...); // print to status buf
352 static void status_line_bold(const char *, ...);
353 static void not_implemented(const char *); // display "Not implemented" message
354 static int format_edit_status(void); // format file status on status line
355 static void redraw(int); // force a full screen refresh
356 static char* format_line(char* /*, int*/);
357 static void refresh(int); // update the terminal from screen[]
359 static void Indicate_Error(void); // use flash or beep to indicate error
360 #define indicate_error(c) Indicate_Error()
361 static void Hit_Return(void);
363 #if ENABLE_FEATURE_VI_SEARCH
364 static char *char_search(char *, const char *, int, int); // search for pattern starting at p
365 static int mycmp(const char *, const char *, int); // string cmp based in "ignorecase"
367 #if ENABLE_FEATURE_VI_COLON
368 static char *get_one_address(char *, int *); // get colon addr, if present
369 static char *get_address(char *, int *, int *); // get two colon addrs, if present
370 static void colon(char *); // execute the "colon" mode cmds
372 #if ENABLE_FEATURE_VI_USE_SIGNALS
373 static void winch_sig(int); // catch window size changes
374 static void suspend_sig(int); // catch ctrl-Z
375 static void catch_sig(int); // catch ctrl-C and alarm time-outs
377 #if ENABLE_FEATURE_VI_DOT_CMD
378 static void start_new_cmd_q(char); // new queue for command
379 static void end_cmd_q(void); // stop saving input chars
381 #define end_cmd_q() ((void)0)
383 #if ENABLE_FEATURE_VI_SETOPTS
384 static void showmatching(char *); // show the matching pair () [] {}
386 #if ENABLE_FEATURE_VI_YANKMARK || (ENABLE_FEATURE_VI_COLON && ENABLE_FEATURE_VI_SEARCH) || ENABLE_FEATURE_VI_CRASHME
387 static char *string_insert(char *, char *); // insert the string at 'p'
389 #if ENABLE_FEATURE_VI_YANKMARK
390 static char *text_yank(char *, char *, int); // save copy of "p" into a register
391 static char what_reg(void); // what is letter of current YDreg
392 static void check_context(char); // remember context for '' command
394 #if ENABLE_FEATURE_VI_CRASHME
395 static void crash_dummy();
396 static void crash_test();
397 static int crashme = 0;
401 static void write1(const char *out)
406 int vi_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
407 int vi_main(int argc, char **argv)
413 #if ENABLE_FEATURE_VI_USE_SIGNALS || ENABLE_FEATURE_VI_CRASHME
416 #if ENABLE_FEATURE_VI_CRASHME
417 srand((long) my_pid);
419 #ifdef NO_SUCH_APPLET_YET
420 /* If we aren't "vi", we are "view" */
421 if (ENABLE_FEATURE_VI_READONLY && applet_name[2]) {
422 SET_READONLY_MODE(readonly_mode);
426 vi_setops = VI_AUTOINDENT | VI_SHOWMATCH | VI_IGNORECASE;
427 #if ENABLE_FEATURE_VI_DOT_CMD || ENABLE_FEATURE_VI_YANKMARK
428 modifying_cmds = (char *) "aAcCdDiIJoOpPrRsxX<>~"; // cmds modifying text[]
431 // 1- process $HOME/.exrc file (not inplemented yet)
432 // 2- process EXINIT variable from environment
433 // 3- process command line args
434 #if ENABLE_FEATURE_VI_COLON
436 char *p = getenv("EXINIT");
438 initial_cmds[0] = xstrndup(p, MAX_INPUT_LEN);
441 while ((c = getopt(argc, argv, "hCRH" USE_FEATURE_VI_COLON("c:"))) != -1) {
443 #if ENABLE_FEATURE_VI_CRASHME
448 #if ENABLE_FEATURE_VI_READONLY
449 case 'R': // Read-only flag
450 SET_READONLY_MODE(readonly_mode);
453 #if ENABLE_FEATURE_VI_COLON
454 case 'c': // cmd line vi command
456 initial_cmds[initial_cmds[0] != 0] = xstrndup(optarg, MAX_INPUT_LEN);
468 // The argv array can be used by the ":next" and ":rewind" commands
470 fn_start = optind; // remember first file name for :next and :rew
473 //----- This is the main file handling loop --------------
474 if (optind >= argc) {
477 for (; optind < argc; optind++) {
478 edit_file(argv[optind]);
481 //-----------------------------------------------------------
486 /* read text from file or create an empty buf */
487 /* will also update current_filename */
488 static int init_text_buffer(char *fn)
491 int size = file_size(fn); // file size. -1 means does not exist.
493 /* allocate/reallocate text buffer */
495 text_size = size + 10240;
496 screenbegin = dot = end = text = xzalloc(text_size);
498 if (fn != current_filename) {
499 free(current_filename);
500 current_filename = xstrdup(fn);
503 // file dont exist. Start empty buf with dummy line
504 char_insert(text, '\n');
507 rc = file_insert(fn, text
508 USE_FEATURE_VI_READONLY(, 1));
511 last_file_modified = -1;
512 #if ENABLE_FEATURE_VI_YANKMARK
513 /* init the marks. */
514 memset(mark, 0, sizeof(mark));
519 static void edit_file(char *fn)
521 #if ENABLE_FEATURE_VI_YANKMARK
522 #define cur_line edit_file__cur_line
526 #if ENABLE_FEATURE_VI_USE_SIGNALS
530 editing = 1; // 0 = exit, 1 = one file, 2 = multiple files
535 if (ENABLE_FEATURE_VI_WIN_RESIZE) {
536 get_terminal_width_height(0, &columns, &rows);
537 if (rows > MAX_SCR_ROWS) rows = MAX_SCR_ROWS;
538 if (columns > MAX_SCR_COLS) columns = MAX_SCR_COLS;
540 new_screen(rows, columns); // get memory for virtual screen
541 init_text_buffer(fn);
543 #if ENABLE_FEATURE_VI_YANKMARK
544 YDreg = 26; // default Yank/Delete reg
545 Ureg = 27; // hold orig line for "U" cmd
546 mark[26] = mark[27] = text; // init "previous context"
549 last_forward_char = last_input_char = '\0';
553 #if ENABLE_FEATURE_VI_USE_SIGNALS
555 signal(SIGWINCH, winch_sig);
556 signal(SIGTSTP, suspend_sig);
557 sig = sigsetjmp(restart, 1);
559 screenbegin = dot = text;
563 cmd_mode = 0; // 0=command 1=insert 2='R'eplace
566 offset = 0; // no horizontal offset
568 #if ENABLE_FEATURE_VI_DOT_CMD
570 ioq = ioq_start = NULL;
575 #if ENABLE_FEATURE_VI_COLON
580 while ((p = initial_cmds[n])) {
590 free(initial_cmds[n]);
591 initial_cmds[n] = NULL;
596 redraw(FALSE); // dont force every col re-draw
597 //------This is the main Vi cmd handling loop -----------------------
598 while (editing > 0) {
599 #if ENABLE_FEATURE_VI_CRASHME
601 if ((end - text) > 1) {
602 crash_dummy(); // generate a random command
605 dot = string_insert(text, "\n\n##### Ran out of text to work on. #####\n\n"); // insert the string
610 last_input_char = c = get_one_char(); // get a cmd from user
611 #if ENABLE_FEATURE_VI_YANKMARK
612 // save a copy of the current line- for the 'U" command
613 if (begin_line(dot) != cur_line) {
614 cur_line = begin_line(dot);
615 text_yank(begin_line(dot), end_line(dot), Ureg);
618 #if ENABLE_FEATURE_VI_DOT_CMD
619 // These are commands that change text[].
620 // Remember the input for the "." command
621 if (!adding2q && ioq_start == NULL
622 && c != '\0' && strchr(modifying_cmds, c)
627 do_cmd(c); // execute the user command
629 // poll to see if there is input already waiting. if we are
630 // not able to display output fast enough to keep up, skip
631 // the display update until we catch up with input.
632 if (mysleep(0) == 0) {
633 // no input pending- so update output
637 #if ENABLE_FEATURE_VI_CRASHME
639 crash_test(); // test editor variables
642 //-------------------------------------------------------------------
644 place_cursor(rows - 1, 0, FALSE); // go to bottom of screen
645 clear_to_eol(); // erase to end of line
650 //----- The Colon commands -------------------------------------
651 #if ENABLE_FEATURE_VI_COLON
652 static char *get_one_address(char *p, int *addr) // get colon addr, if present
656 USE_FEATURE_VI_YANKMARK(char c;)
657 USE_FEATURE_VI_SEARCH(char *pat;)
659 *addr = -1; // assume no addr
660 if (*p == '.') { // the current line
663 *addr = count_lines(text, q);
665 #if ENABLE_FEATURE_VI_YANKMARK
666 else if (*p == '\'') { // is this a mark addr
670 if (c >= 'a' && c <= 'z') {
673 q = mark[(unsigned char) c];
674 if (q != NULL) { // is mark valid
675 *addr = count_lines(text, q); // count lines
680 #if ENABLE_FEATURE_VI_SEARCH
681 else if (*p == '/') { // a search pattern
682 q = strchrnul(++p, '/');
683 pat = xstrndup(p, q - p); // save copy of pattern
687 q = char_search(dot, pat, FORWARD, FULL);
689 *addr = count_lines(text, q);
694 else if (*p == '$') { // the last line in file
696 q = begin_line(end - 1);
697 *addr = count_lines(text, q);
698 } else if (isdigit(*p)) { // specific line number
699 sscanf(p, "%d%n", addr, &st);
702 // unrecognised address - assume -1
708 static char *get_address(char *p, int *b, int *e) // get two colon addrs, if present
710 //----- get the address' i.e., 1,3 'a,'b -----
711 // get FIRST addr, if present
713 p++; // skip over leading spaces
714 if (*p == '%') { // alias for 1,$
717 *e = count_lines(text, end-1);
720 p = get_one_address(p, b);
723 if (*p == ',') { // is there a address separator
727 // get SECOND addr, if present
728 p = get_one_address(p, e);
732 p++; // skip over trailing spaces
736 #if ENABLE_FEATURE_VI_SET && ENABLE_FEATURE_VI_SETOPTS
737 static void setops(const char *args, const char *opname, int flg_no,
738 const char *short_opname, int opt)
740 const char *a = args + flg_no;
741 int l = strlen(opname) - 1; /* opname have + ' ' */
743 if (strncasecmp(a, opname, l) == 0
744 || strncasecmp(a, short_opname, 2) == 0
754 // buf must be no longer than MAX_INPUT_LEN!
755 static void colon(char *buf)
757 char c, *orig_buf, *buf1, *q, *r;
758 char *fn, cmd[MAX_INPUT_LEN], args[MAX_INPUT_LEN];
759 int i, l, li, ch, b, e;
760 int useforce, forced = FALSE;
762 // :3154 // if (-e line 3154) goto it else stay put
763 // :4,33w! foo // write a portion of buffer to file "foo"
764 // :w // write all of buffer to current file
766 // :q! // quit- dont care about modified file
767 // :'a,'z!sort -u // filter block through sort
768 // :'f // goto mark "f"
769 // :'fl // list literal the mark "f" line
770 // :.r bar // read file "bar" into buffer before dot
771 // :/123/,/abc/d // delete lines from "123" line to "abc" line
772 // :/xyz/ // goto the "xyz" line
773 // :s/find/replace/ // substitute pattern "find" with "replace"
774 // :!<cmd> // run <cmd> then return
780 buf++; // move past the ':'
784 q = text; // assume 1,$ for the range
786 li = count_lines(text, end - 1);
787 fn = current_filename;
789 // look for optional address(es) :. :1 :1,9 :'q,'a :%
790 buf = get_address(buf, &b, &e);
792 // remember orig command line
795 // get the COMMAND into cmd[]
797 while (*buf != '\0') {
804 while (isblank(*buf))
808 buf1 = last_char_is(cmd, '!');
811 *buf1 = '\0'; // get rid of !
814 // if there is only one addr, then the addr
815 // is the line number of the single line the
816 // user wants. So, reset the end
817 // pointer to point at end of the "b" line
818 q = find_line(b); // what line is #b
823 // we were given two addrs. change the
824 // end pointer to the addr given by user.
825 r = find_line(e); // what line is #e
829 // ------------ now look for the command ------------
831 if (i == 0) { // :123CR goto line #123
833 dot = find_line(b); // what line is #b
837 #if ENABLE_FEATURE_ALLOW_EXEC
838 else if (strncmp(cmd, "!", 1) == 0) { // run a cmd
840 // :!ls run the <cmd>
841 place_cursor(rows - 1, 0, FALSE); // go to Status line
842 clear_to_eol(); // clear the line
844 retcode = system(orig_buf + 1); // run the cmd
846 printf("\nshell returned %i\n\n", retcode);
848 Hit_Return(); // let user see results
851 else if (strncmp(cmd, "=", i) == 0) { // where is the address
852 if (b < 0) { // no addr given- use defaults
853 b = e = count_lines(text, dot);
855 status_line("%d", b);
856 } else if (strncasecmp(cmd, "delete", i) == 0) { // delete lines
857 if (b < 0) { // no addr given- use defaults
858 q = begin_line(dot); // assume .,. for the range
861 dot = yank_delete(q, r, 1, YANKDEL); // save, then delete lines
863 } else if (strncasecmp(cmd, "edit", i) == 0) { // Edit a file
864 // don't edit, if the current file has been modified
865 if (file_modified && !useforce) {
866 status_line_bold("No write since last change (:edit! overrides)");
870 // the user supplied a file name
872 } else if (current_filename && current_filename[0]) {
873 // no user supplied name- use the current filename
874 // fn = current_filename; was set by default
876 // no user file name, no current name- punt
877 status_line_bold("No current filename");
881 if (init_text_buffer(fn) < 0)
884 #if ENABLE_FEATURE_VI_YANKMARK
885 if (Ureg >= 0 && Ureg < 28 && reg[Ureg] != 0) {
886 free(reg[Ureg]); // free orig line reg- for 'U'
889 if (YDreg >= 0 && YDreg < 28 && reg[YDreg] != 0) {
890 free(reg[YDreg]); // free default yank/delete register
894 // how many lines in text[]?
895 li = count_lines(text, end - 1);
896 status_line("\"%s\"%s"
897 USE_FEATURE_VI_READONLY("%s")
898 " %dL, %dC", current_filename,
899 (file_size(fn) < 0 ? " [New file]" : ""),
900 USE_FEATURE_VI_READONLY(
901 ((readonly_mode) ? " [Readonly]" : ""),
904 } else if (strncasecmp(cmd, "file", i) == 0) { // what File is this
905 if (b != -1 || e != -1) {
906 not_implemented("No address allowed on this command");
910 // user wants a new filename
911 free(current_filename);
912 current_filename = xstrdup(args);
914 // user wants file status info
915 last_status_cksum = 0; // force status update
917 } else if (strncasecmp(cmd, "features", i) == 0) { // what features are available
918 // print out values of all features
919 place_cursor(rows - 1, 0, FALSE); // go to Status line, bottom of screen
920 clear_to_eol(); // clear the line
925 } else if (strncasecmp(cmd, "list", i) == 0) { // literal print line
926 if (b < 0) { // no addr given- use defaults
927 q = begin_line(dot); // assume .,. for the range
930 place_cursor(rows - 1, 0, FALSE); // go to Status line, bottom of screen
931 clear_to_eol(); // clear the line
933 for (; q <= r; q++) {
937 c_is_no_print = (c & 0x80) && !Isprint(c);
944 } else if (c < ' ' || c == 127) {
955 #if ENABLE_FEATURE_VI_SET
959 } else if (strncasecmp(cmd, "quit", i) == 0 // Quit
960 || strncasecmp(cmd, "next", i) == 0 // edit next file
963 // force end of argv list
970 // don't exit if the file been modified
972 status_line_bold("No write since last change (:%s! overrides)",
973 (*cmd == 'q' ? "quit" : "next"));
976 // are there other file to edit
977 if (*cmd == 'q' && optind < save_argc - 1) {
978 status_line_bold("%d more file to edit", (save_argc - optind - 1));
981 if (*cmd == 'n' && optind >= save_argc - 1) {
982 status_line_bold("No more files to edit");
986 } else if (strncasecmp(cmd, "read", i) == 0) { // read file into text[]
989 status_line_bold("No filename given");
992 if (b < 0) { // no addr given- use defaults
993 q = begin_line(dot); // assume "dot"
995 // read after current line- unless user said ":0r foo"
998 ch = file_insert(fn, q USE_FEATURE_VI_READONLY(, 0));
1000 goto vc1; // nothing was inserted
1001 // how many lines in text[]?
1002 li = count_lines(q, q + ch - 1);
1003 status_line("\"%s\""
1004 USE_FEATURE_VI_READONLY("%s")
1006 USE_FEATURE_VI_READONLY((readonly_mode ? " [Readonly]" : ""),)
1009 // if the insert is before "dot" then we need to update
1014 } else if (strncasecmp(cmd, "rewind", i) == 0) { // rewind cmd line args
1015 if (file_modified && !useforce) {
1016 status_line_bold("No write since last change (:rewind! overrides)");
1018 // reset the filenames to edit
1019 optind = fn_start - 1;
1022 #if ENABLE_FEATURE_VI_SET
1023 } else if (strncasecmp(cmd, "set", i) == 0) { // set or clear features
1024 #if ENABLE_FEATURE_VI_SETOPTS
1027 i = 0; // offset into args
1028 // only blank is regarded as args delmiter. What about tab '\t' ?
1029 if (!args[0] || strcasecmp(args, "all") == 0) {
1030 // print out values of all options
1031 place_cursor(rows - 1, 0, FALSE); // go to Status line, bottom of screen
1032 clear_to_eol(); // clear the line
1033 printf("----------------------------------------\r\n");
1034 #if ENABLE_FEATURE_VI_SETOPTS
1037 printf("autoindent ");
1043 printf("ignorecase ");
1046 printf("showmatch ");
1047 printf("tabstop=%d ", tabstop);
1052 #if ENABLE_FEATURE_VI_SETOPTS
1055 if (strncasecmp(argp, "no", 2) == 0)
1056 i = 2; // ":set noautoindent"
1057 setops(argp, "autoindent ", i, "ai", VI_AUTOINDENT);
1058 setops(argp, "flash ", i, "fl", VI_ERR_METHOD);
1059 setops(argp, "ignorecase ", i, "ic", VI_IGNORECASE);
1060 setops(argp, "showmatch ", i, "ic", VI_SHOWMATCH);
1062 if (strncasecmp(argp + i, "tabstop=%d ", 7) == 0) {
1063 sscanf(strchr(argp + i, '='), "tabstop=%d" + 7, &ch);
1064 if (ch > 0 && ch <= MAX_TABSTOP)
1067 while (*argp && *argp != ' ')
1068 argp++; // skip to arg delimiter (i.e. blank)
1069 while (*argp && *argp == ' ')
1070 argp++; // skip all delimiting blanks
1072 #endif /* FEATURE_VI_SETOPTS */
1073 #endif /* FEATURE_VI_SET */
1074 #if ENABLE_FEATURE_VI_SEARCH
1075 } else if (strncasecmp(cmd, "s", 1) == 0) { // substitute a pattern with a replacement pattern
1079 // F points to the "find" pattern
1080 // R points to the "replace" pattern
1081 // replace the cmd line delimiters "/" with NULLs
1082 gflag = 0; // global replace flag
1083 c = orig_buf[1]; // what is the delimiter
1084 F = orig_buf + 2; // start of "find"
1085 R = strchr(F, c); // middle delimiter
1086 if (!R) goto colon_s_fail;
1087 *R++ = '\0'; // terminate "find"
1088 buf1 = strchr(R, c);
1089 if (!buf1) goto colon_s_fail;
1090 *buf1++ = '\0'; // terminate "replace"
1091 if (*buf1 == 'g') { // :s/foo/bar/g
1093 gflag++; // turn on gflag
1096 if (b < 0) { // maybe :s/foo/bar/
1097 q = begin_line(dot); // start with cur line
1098 b = count_lines(text, q); // cur line number
1101 e = b; // maybe :.s/foo/bar/
1102 for (i = b; i <= e; i++) { // so, :20,23 s \0 find \0 replace \0
1103 ls = q; // orig line start
1105 buf1 = char_search(q, F, FORWARD, LIMITED); // search cur line only for "find"
1107 // we found the "find" pattern - delete it
1108 text_hole_delete(buf1, buf1 + strlen(F) - 1);
1109 // inset the "replace" patern
1110 string_insert(buf1, R); // insert the string
1111 // check for "global" :s/foo/bar/g
1113 if ((buf1 + strlen(R)) < end_line(ls)) {
1114 q = buf1 + strlen(R);
1115 goto vc4; // don't let q move past cur line
1121 #endif /* FEATURE_VI_SEARCH */
1122 } else if (strncasecmp(cmd, "version", i) == 0) { // show software version
1123 status_line(BB_VER " " BB_BT);
1124 } else if (strncasecmp(cmd, "write", i) == 0 // write text to file
1125 || strncasecmp(cmd, "wq", i) == 0
1126 || strncasecmp(cmd, "wn", i) == 0
1127 || strncasecmp(cmd, "x", i) == 0
1129 // is there a file name to write to?
1133 #if ENABLE_FEATURE_VI_READONLY
1134 if (readonly_mode && !useforce) {
1135 status_line_bold("\"%s\" File is read only", fn);
1139 // how many lines in text[]?
1140 li = count_lines(q, r);
1142 // see if file exists- if not, its just a new file request
1144 // if "fn" is not write-able, chmod u+w
1145 // sprintf(syscmd, "chmod u+w %s", fn);
1149 l = file_write(fn, q, r);
1150 if (useforce && forced) {
1152 // sprintf(syscmd, "chmod u-w %s", fn);
1158 status_line_bold("\"%s\" %s", fn, strerror(errno));
1160 status_line("\"%s\" %dL, %dC", fn, li, l);
1161 if (q == text && r == end - 1 && l == ch) {
1163 last_file_modified = -1;
1165 if ((cmd[0] == 'x' || cmd[1] == 'q' || cmd[1] == 'n' ||
1166 cmd[0] == 'X' || cmd[1] == 'Q' || cmd[1] == 'N')
1171 #if ENABLE_FEATURE_VI_READONLY
1174 #if ENABLE_FEATURE_VI_YANKMARK
1175 } else if (strncasecmp(cmd, "yank", i) == 0) { // yank lines
1176 if (b < 0) { // no addr given- use defaults
1177 q = begin_line(dot); // assume .,. for the range
1180 text_yank(q, r, YDreg);
1181 li = count_lines(q, r);
1182 status_line("Yank %d lines (%d chars) into [%c]",
1183 li, strlen(reg[YDreg]), what_reg());
1187 not_implemented(cmd);
1190 dot = bound_dot(dot); // make sure "dot" is valid
1192 #if ENABLE_FEATURE_VI_SEARCH
1194 status_line(":s expression missing delimiters");
1198 #endif /* FEATURE_VI_COLON */
1200 static void Hit_Return(void)
1205 write1("[Hit return to continue]");
1207 while ((c = get_one_char()) != '\n' && c != '\r')
1209 redraw(TRUE); // force redraw all
1212 static int next_tabstop(int col)
1214 return col + ((tabstop - 1) - (col % tabstop));
1217 //----- Synchronize the cursor to Dot --------------------------
1218 static void sync_cursor(char *d, int *row, int *col)
1220 char *beg_cur; // begin and end of "d" line
1224 beg_cur = begin_line(d); // first char of cur line
1226 if (beg_cur < screenbegin) {
1227 // "d" is before top line on screen
1228 // how many lines do we have to move
1229 cnt = count_lines(beg_cur, screenbegin);
1231 screenbegin = beg_cur;
1232 if (cnt > (rows - 1) / 2) {
1233 // we moved too many lines. put "dot" in middle of screen
1234 for (cnt = 0; cnt < (rows - 1) / 2; cnt++) {
1235 screenbegin = prev_line(screenbegin);
1239 char *end_scr; // begin and end of screen
1240 end_scr = end_screen(); // last char of screen
1241 if (beg_cur > end_scr) {
1242 // "d" is after bottom line on screen
1243 // how many lines do we have to move
1244 cnt = count_lines(end_scr, beg_cur);
1245 if (cnt > (rows - 1) / 2)
1246 goto sc1; // too many lines
1247 for (ro = 0; ro < cnt - 1; ro++) {
1248 // move screen begin the same amount
1249 screenbegin = next_line(screenbegin);
1250 // now, move the end of screen
1251 end_scr = next_line(end_scr);
1252 end_scr = end_line(end_scr);
1256 // "d" is on screen- find out which row
1258 for (ro = 0; ro < rows - 1; ro++) { // drive "ro" to correct row
1264 // find out what col "d" is on
1266 while (tp < d) { // drive "co" to correct column
1267 if (*tp == '\n') //vda || *tp == '\0')
1270 // handle tabs like real vi
1271 if (d == tp && cmd_mode) {
1274 co = next_tabstop(co);
1275 } else if ((unsigned char)*tp < ' ' || *tp == 0x7f) {
1276 co++; // display as ^X, use 2 columns
1282 // "co" is the column where "dot" is.
1283 // The screen has "columns" columns.
1284 // The currently displayed columns are 0+offset -- columns+ofset
1285 // |-------------------------------------------------------------|
1287 // offset | |------- columns ----------------|
1289 // If "co" is already in this range then we do not have to adjust offset
1290 // but, we do have to subtract the "offset" bias from "co".
1291 // If "co" is outside this range then we have to change "offset".
1292 // If the first char of a line is a tab the cursor will try to stay
1293 // in column 7, but we have to set offset to 0.
1295 if (co < 0 + offset) {
1298 if (co >= columns + offset) {
1299 offset = co - columns + 1;
1301 // if the first char of the line is a tab, and "dot" is sitting on it
1302 // force offset to 0.
1303 if (d == beg_cur && *d == '\t') {
1312 //----- Text Movement Routines ---------------------------------
1313 static char *begin_line(char *p) // return pointer to first char cur line
1316 p = memrchr(text, '\n', p - text);
1324 static char *end_line(char *p) // return pointer to NL of cur line
1327 p = memchr(p, '\n', end - p - 1);
1334 static char *dollar_line(char *p) // return pointer to just before NL line
1337 // Try to stay off of the Newline
1338 if (*p == '\n' && (p - begin_line(p)) > 0)
1343 static char *prev_line(char *p) // return pointer first char prev line
1345 p = begin_line(p); // goto begining of cur line
1346 if (p > text && p[-1] == '\n')
1347 p--; // step to prev line
1348 p = begin_line(p); // goto begining of prev line
1352 static char *next_line(char *p) // return pointer first char next line
1355 if (p < end - 1 && *p == '\n')
1356 p++; // step to next line
1360 //----- Text Information Routines ------------------------------
1361 static char *end_screen(void)
1366 // find new bottom line
1368 for (cnt = 0; cnt < rows - 2; cnt++)
1374 // count line from start to stop
1375 static int count_lines(char *start, char *stop)
1380 if (stop < start) { // start and stop are backwards- reverse them
1386 stop = end_line(stop);
1387 while (start <= stop && start <= end - 1) {
1388 start = end_line(start);
1396 static char *find_line(int li) // find begining of line #li
1400 for (q = text; li > 1; li--) {
1406 //----- Dot Movement Routines ----------------------------------
1407 static void dot_left(void)
1409 if (dot > text && dot[-1] != '\n')
1413 static void dot_right(void)
1415 if (dot < end - 1 && *dot != '\n')
1419 static void dot_begin(void)
1421 dot = begin_line(dot); // return pointer to first char cur line
1424 static void dot_end(void)
1426 dot = end_line(dot); // return pointer to last char cur line
1429 static char *move_to_col(char *p, int l)
1435 while (co < l && p < end) {
1436 if (*p == '\n') //vda || *p == '\0')
1439 co = next_tabstop(co);
1440 } else if (*p < ' ' || *p == 127) {
1441 co++; // display as ^X, use 2 columns
1449 static void dot_next(void)
1451 dot = next_line(dot);
1454 static void dot_prev(void)
1456 dot = prev_line(dot);
1459 static void dot_scroll(int cnt, int dir)
1463 for (; cnt > 0; cnt--) {
1466 // ctrl-Y scroll up one line
1467 screenbegin = prev_line(screenbegin);
1470 // ctrl-E scroll down one line
1471 screenbegin = next_line(screenbegin);
1474 // make sure "dot" stays on the screen so we dont scroll off
1475 if (dot < screenbegin)
1477 q = end_screen(); // find new bottom line
1479 dot = begin_line(q); // is dot is below bottom line?
1483 static void dot_skip_over_ws(void)
1486 while (isspace(*dot) && *dot != '\n' && dot < end - 1)
1490 static void dot_delete(void) // delete the char at 'dot'
1492 text_hole_delete(dot, dot);
1495 static char *bound_dot(char *p) // make sure text[0] <= P < "end"
1497 if (p >= end && end > text) {
1499 indicate_error('1');
1503 indicate_error('2');
1508 //----- Helper Utility Routines --------------------------------
1510 //----------------------------------------------------------------
1511 //----- Char Routines --------------------------------------------
1512 /* Chars that are part of a word-
1513 * 0123456789_ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz
1514 * Chars that are Not part of a word (stoppers)
1515 * !"#$%&'()*+,-./:;<=>?@[\]^`{|}~
1516 * Chars that are WhiteSpace
1517 * TAB NEWLINE VT FF RETURN SPACE
1518 * DO NOT COUNT NEWLINE AS WHITESPACE
1521 static char *new_screen(int ro, int co)
1526 screensize = ro * co + 8;
1527 screen = xmalloc(screensize);
1528 // initialize the new screen. assume this will be a empty file.
1530 // non-existent text[] lines start with a tilde (~).
1531 for (li = 1; li < ro - 1; li++) {
1532 screen[(li * co) + 0] = '~';
1537 #if ENABLE_FEATURE_VI_SEARCH
1538 static int mycmp(const char *s1, const char *s2, int len)
1542 i = strncmp(s1, s2, len);
1543 if (ENABLE_FEATURE_VI_SETOPTS && ignorecase) {
1544 i = strncasecmp(s1, s2, len);
1549 // search for pattern starting at p
1550 static char *char_search(char *p, const char *pat, int dir, int range)
1552 #ifndef REGEX_SEARCH
1557 if (dir == FORWARD) {
1558 stop = end - 1; // assume range is p - end-1
1559 if (range == LIMITED)
1560 stop = next_line(p); // range is to next line
1561 for (start = p; start < stop; start++) {
1562 if (mycmp(start, pat, len) == 0) {
1566 } else if (dir == BACK) {
1567 stop = text; // assume range is text - p
1568 if (range == LIMITED)
1569 stop = prev_line(p); // range is to prev line
1570 for (start = p - len; start >= stop; start--) {
1571 if (mycmp(start, pat, len) == 0) {
1576 // pattern not found
1578 #else /* REGEX_SEARCH */
1580 struct re_pattern_buffer preg;
1584 re_syntax_options = RE_SYNTAX_POSIX_EXTENDED;
1590 // assume a LIMITED forward search
1598 // count the number of chars to search over, forward or backward
1602 // RANGE could be negative if we are searching backwards
1605 q = re_compile_pattern(pat, strlen(pat), &preg);
1607 // The pattern was not compiled
1608 status_line_bold("bad search pattern: \"%s\": %s", pat, q);
1609 i = 0; // return p if pattern not compiled
1619 // search for the compiled pattern, preg, in p[]
1620 // range < 0- search backward
1621 // range > 0- search forward
1623 // re_search() < 0 not found or error
1624 // re_search() > 0 index of found pattern
1625 // struct pattern char int int int struct reg
1626 // re_search (*pattern_buffer, *string, size, start, range, *regs)
1627 i = re_search(&preg, q, size, 0, range, 0);
1630 i = 0; // return NULL if pattern not found
1633 if (dir == FORWARD) {
1639 #endif /* REGEX_SEARCH */
1641 #endif /* FEATURE_VI_SEARCH */
1643 static char *char_insert(char *p, char c) // insert the char c at 'p'
1645 if (c == 22) { // Is this an ctrl-V?
1646 p = stupid_insert(p, '^'); // use ^ to indicate literal next
1647 p--; // backup onto ^
1648 refresh(FALSE); // show the ^
1653 } else if (c == 27) { // Is this an ESC?
1656 end_cmd_q(); // stop adding to q
1657 last_status_cksum = 0; // force status update
1658 if ((p[-1] != '\n') && (dot > text)) {
1661 } else if (c == erase_char || c == 8 || c == 127) { // Is this a BS
1663 if ((p[-1] != '\n') && (dot>text)) {
1665 p = text_hole_delete(p, p); // shrink buffer 1 char
1668 // insert a char into text[]
1669 char *sp; // "save p"
1672 c = '\n'; // translate \r to \n
1673 sp = p; // remember addr of insert
1674 p = stupid_insert(p, c); // insert the char
1675 #if ENABLE_FEATURE_VI_SETOPTS
1676 if (showmatch && strchr(")]}", *sp) != NULL) {
1679 if (autoindent && c == '\n') { // auto indent the new line
1682 q = prev_line(p); // use prev line as templet
1683 for (; isblank(*q); q++) {
1684 p = stupid_insert(p, *q); // insert the char
1692 static char *stupid_insert(char *p, char c) // stupidly insert the char c at 'p'
1694 p = text_hole_make(p, 1);
1696 //file_modified++; - done by text_hole_make()
1700 static int find_range(char **start, char **stop, char c)
1702 char *save_dot, *p, *q, *t;
1703 int cnt, multiline = 0;
1708 if (strchr("cdy><", c)) {
1709 // these cmds operate on whole lines
1710 p = q = begin_line(p);
1711 for (cnt = 1; cnt < cmdcnt; cnt++) {
1715 } else if (strchr("^%$0bBeEfth\b\177", c)) {
1716 // These cmds operate on char positions
1717 do_cmd(c); // execute movement cmd
1719 } else if (strchr("wW", c)) {
1720 do_cmd(c); // execute movement cmd
1721 // if we are at the next word's first char
1722 // step back one char
1723 // but check the possibilities when it is true
1724 if (dot > text && ((isspace(dot[-1]) && !isspace(dot[0]))
1725 || (ispunct(dot[-1]) && !ispunct(dot[0]))
1726 || (isalnum(dot[-1]) && !isalnum(dot[0]))))
1727 dot--; // move back off of next word
1728 if (dot > text && *dot == '\n')
1729 dot--; // stay off NL
1731 } else if (strchr("H-k{", c)) {
1732 // these operate on multi-lines backwards
1733 q = end_line(dot); // find NL
1734 do_cmd(c); // execute movement cmd
1737 } else if (strchr("L+j}\r\n", c)) {
1738 // these operate on multi-lines forwards
1739 p = begin_line(dot);
1740 do_cmd(c); // execute movement cmd
1741 dot_end(); // find NL
1744 // nothing -- this causes any other values of c to
1745 // represent the one-character range under the
1746 // cursor. this is correct for ' ' and 'l', but
1747 // perhaps no others.
1756 // backward char movements don't include start position
1757 if (q > p && strchr("^0bBh\b\177", c)) q--;
1760 for (t = p; t <= q; t++) {
1773 static int st_test(char *p, int type, int dir, char *tested)
1783 if (type == S_BEFORE_WS) {
1785 test = ((!isspace(c)) || c == '\n');
1787 if (type == S_TO_WS) {
1789 test = ((!isspace(c)) || c == '\n');
1791 if (type == S_OVER_WS) {
1793 test = ((isspace(c)));
1795 if (type == S_END_PUNCT) {
1797 test = ((ispunct(c)));
1799 if (type == S_END_ALNUM) {
1801 test = ((isalnum(c)) || c == '_');
1807 static char *skip_thing(char *p, int linecnt, int dir, int type)
1811 while (st_test(p, type, dir, &c)) {
1812 // make sure we limit search to correct number of lines
1813 if (c == '\n' && --linecnt < 1)
1815 if (dir >= 0 && p >= end - 1)
1817 if (dir < 0 && p <= text)
1819 p += dir; // move to next char
1824 // find matching char of pair () [] {}
1825 static char *find_pair(char *p, const char c)
1832 dir = 1; // assume forward
1834 case '(': match = ')'; break;
1835 case '[': match = ']'; break;
1836 case '{': match = '}'; break;
1837 case ')': match = '('; dir = -1; break;
1838 case ']': match = '['; dir = -1; break;
1839 case '}': match = '{'; dir = -1; break;
1841 for (q = p + dir; text <= q && q < end; q += dir) {
1842 // look for match, count levels of pairs (( ))
1844 level++; // increase pair levels
1846 level--; // reduce pair level
1848 break; // found matching pair
1851 q = NULL; // indicate no match
1855 #if ENABLE_FEATURE_VI_SETOPTS
1856 // show the matching char of a pair, () [] {}
1857 static void showmatching(char *p)
1861 // we found half of a pair
1862 q = find_pair(p, *p); // get loc of matching char
1864 indicate_error('3'); // no matching char
1866 // "q" now points to matching pair
1867 save_dot = dot; // remember where we are
1868 dot = q; // go to new loc
1869 refresh(FALSE); // let the user see it
1870 mysleep(40); // give user some time
1871 dot = save_dot; // go back to old loc
1875 #endif /* FEATURE_VI_SETOPTS */
1877 // open a hole in text[]
1878 static char *text_hole_make(char *p, int size) // at "p", make a 'size' byte hole
1882 end += size; // adjust the new END
1883 if (end >= (text + text_size)) {
1885 text_size += end - (text + text_size) + 10240;
1886 new_text = xrealloc(text, text_size);
1887 screenbegin = new_text + (screenbegin - text);
1888 dot = new_text + (dot - text);
1889 end = new_text + (end - text);
1890 p = new_text + (p - text);
1893 memmove(p + size, p, end - size - p);
1894 memset(p, ' ', size); // clear new hole
1899 // close a hole in text[]
1900 static char *text_hole_delete(char *p, char *q) // delete "p" through "q", inclusive
1905 // move forwards, from beginning
1909 if (q < p) { // they are backward- swap them
1913 hole_size = q - p + 1;
1915 if (src < text || src > end)
1917 if (dest < text || dest >= end)
1920 goto thd_atend; // just delete the end of the buffer
1921 memmove(dest, src, cnt);
1923 end = end - hole_size; // adjust the new END
1925 dest = end - 1; // make sure dest in below end-1
1927 dest = end = text; // keep pointers valid
1933 // copy text into register, then delete text.
1934 // if dist <= 0, do not include, or go past, a NewLine
1936 static char *yank_delete(char *start, char *stop, int dist, int yf)
1940 // make sure start <= stop
1942 // they are backwards, reverse them
1948 // we cannot cross NL boundaries
1952 // dont go past a NewLine
1953 for (; p + 1 <= stop; p++) {
1955 stop = p; // "stop" just before NewLine
1961 #if ENABLE_FEATURE_VI_YANKMARK
1962 text_yank(start, stop, YDreg);
1964 if (yf == YANKDEL) {
1965 p = text_hole_delete(start, stop);
1970 static void show_help(void)
1972 puts("These features are available:"
1973 #if ENABLE_FEATURE_VI_SEARCH
1974 "\n\tPattern searches with / and ?"
1976 #if ENABLE_FEATURE_VI_DOT_CMD
1977 "\n\tLast command repeat with \'.\'"
1979 #if ENABLE_FEATURE_VI_YANKMARK
1980 "\n\tLine marking with 'x"
1981 "\n\tNamed buffers with \"x"
1983 #if ENABLE_FEATURE_VI_READONLY
1984 "\n\tReadonly if vi is called as \"view\""
1985 "\n\tReadonly with -R command line arg"
1987 #if ENABLE_FEATURE_VI_SET
1988 "\n\tSome colon mode commands with \':\'"
1990 #if ENABLE_FEATURE_VI_SETOPTS
1991 "\n\tSettable options with \":set\""
1993 #if ENABLE_FEATURE_VI_USE_SIGNALS
1994 "\n\tSignal catching- ^C"
1995 "\n\tJob suspend and resume with ^Z"
1997 #if ENABLE_FEATURE_VI_WIN_RESIZE
1998 "\n\tAdapt to window re-sizes"
2003 #if ENABLE_FEATURE_VI_DOT_CMD
2004 static void start_new_cmd_q(char c)
2006 // get buffer for new cmd
2007 // if there is a current cmd count put it in the buffer first
2009 lmc_len = sprintf(last_modifying_cmd, "%d%c", cmdcnt, c);
2010 } else { // just save char c onto queue
2011 last_modifying_cmd[0] = c;
2017 static void end_cmd_q(void)
2019 #if ENABLE_FEATURE_VI_YANKMARK
2020 YDreg = 26; // go back to default Yank/Delete reg
2024 #endif /* FEATURE_VI_DOT_CMD */
2026 #if ENABLE_FEATURE_VI_YANKMARK \
2027 || (ENABLE_FEATURE_VI_COLON && ENABLE_FEATURE_VI_SEARCH) \
2028 || ENABLE_FEATURE_VI_CRASHME
2029 static char *string_insert(char *p, char *s) // insert the string at 'p'
2034 text_hole_make(p, i);
2036 for (cnt = 0; *s != '\0'; s++) {
2040 #if ENABLE_FEATURE_VI_YANKMARK
2041 status_line("Put %d lines (%d chars) from [%c]", cnt, i, what_reg());
2047 #if ENABLE_FEATURE_VI_YANKMARK
2048 static char *text_yank(char *p, char *q, int dest) // copy text into a register
2053 if (q < p) { // they are backwards- reverse them
2060 free(t); // if already a yank register, free it
2061 t = xmalloc(cnt + 1); // get a new register
2062 memset(t, '\0', cnt + 1); // clear new text[]
2063 strncpy(t, p, cnt); // copy text[] into bufer
2068 static char what_reg(void)
2072 c = 'D'; // default to D-reg
2073 if (0 <= YDreg && YDreg <= 25)
2074 c = 'a' + (char) YDreg;
2082 static void check_context(char cmd)
2084 // A context is defined to be "modifying text"
2085 // Any modifying command establishes a new context.
2087 if (dot < context_start || dot > context_end) {
2088 if (strchr(modifying_cmds, cmd) != NULL) {
2089 // we are trying to modify text[]- make this the current context
2090 mark[27] = mark[26]; // move cur to prev
2091 mark[26] = dot; // move local to cur
2092 context_start = prev_line(prev_line(dot));
2093 context_end = next_line(next_line(dot));
2094 //loiter= start_loiter= now;
2099 static char *swap_context(char *p) // goto new context for '' command make this the current context
2103 // the current context is in mark[26]
2104 // the previous context is in mark[27]
2105 // only swap context if other context is valid
2106 if (text <= mark[27] && mark[27] <= end - 1) {
2108 mark[27] = mark[26];
2110 p = mark[26]; // where we are going- previous context
2111 context_start = prev_line(prev_line(prev_line(p)));
2112 context_end = next_line(next_line(next_line(p)));
2116 #endif /* FEATURE_VI_YANKMARK */
2118 //----- Set terminal attributes --------------------------------
2119 static void rawmode(void)
2121 tcgetattr(0, &term_orig);
2122 term_vi = term_orig;
2123 term_vi.c_lflag &= (~ICANON & ~ECHO); // leave ISIG ON- allow intr's
2124 term_vi.c_iflag &= (~IXON & ~ICRNL);
2125 term_vi.c_oflag &= (~ONLCR);
2126 term_vi.c_cc[VMIN] = 1;
2127 term_vi.c_cc[VTIME] = 0;
2128 erase_char = term_vi.c_cc[VERASE];
2129 tcsetattr(0, TCSANOW, &term_vi);
2132 static void cookmode(void)
2135 tcsetattr(0, TCSANOW, &term_orig);
2138 //----- Come here when we get a window resize signal ---------
2139 #if ENABLE_FEATURE_VI_USE_SIGNALS
2140 static void winch_sig(int sig UNUSED_PARAM)
2142 // FIXME: do it in main loop!!!
2143 signal(SIGWINCH, winch_sig);
2144 if (ENABLE_FEATURE_VI_WIN_RESIZE) {
2145 get_terminal_width_height(0, &columns, &rows);
2146 if (rows > MAX_SCR_ROWS) rows = MAX_SCR_ROWS;
2147 if (columns > MAX_SCR_COLS) columns = MAX_SCR_COLS;
2149 new_screen(rows, columns); // get memory for virtual screen
2150 redraw(TRUE); // re-draw the screen
2153 //----- Come here when we get a continue signal -------------------
2154 static void cont_sig(int sig UNUSED_PARAM)
2156 rawmode(); // terminal to "raw"
2157 last_status_cksum = 0; // force status update
2158 redraw(TRUE); // re-draw the screen
2160 signal(SIGTSTP, suspend_sig);
2161 signal(SIGCONT, SIG_DFL);
2162 kill(my_pid, SIGCONT); // huh? why? we are already "continued"...
2165 //----- Come here when we get a Suspend signal -------------------
2166 static void suspend_sig(int sig UNUSED_PARAM)
2168 place_cursor(rows - 1, 0, FALSE); // go to bottom of screen
2169 clear_to_eol(); // erase to end of line
2170 cookmode(); // terminal to "cooked"
2172 signal(SIGCONT, cont_sig);
2173 signal(SIGTSTP, SIG_DFL);
2174 kill(my_pid, SIGTSTP);
2177 //----- Come here when we get a signal ---------------------------
2178 static void catch_sig(int sig)
2180 signal(SIGINT, catch_sig);
2182 siglongjmp(restart, sig);
2184 #endif /* FEATURE_VI_USE_SIGNALS */
2186 static int mysleep(int hund) // sleep for 'h' 1/100 seconds
2188 struct pollfd pfd[1];
2191 pfd[0].events = POLLIN;
2192 return safe_poll(pfd, 1, hund*10) > 0;
2195 //----- IO Routines --------------------------------------------
2196 static char readit(void) // read (maybe cursor) key from stdin
2201 // Known escape sequences for cursor and function keys.
2202 static const struct esc_cmds {
2206 {"OA" , VI_K_UP }, // cursor key Up
2207 {"OB" , VI_K_DOWN }, // cursor key Down
2208 {"OC" , VI_K_RIGHT }, // Cursor Key Right
2209 {"OD" , VI_K_LEFT }, // cursor key Left
2210 {"OH" , VI_K_HOME }, // Cursor Key Home
2211 {"OF" , VI_K_END }, // Cursor Key End
2212 {"OP" , VI_K_FUN1 }, // Function Key F1
2213 {"OQ" , VI_K_FUN2 }, // Function Key F2
2214 {"OR" , VI_K_FUN3 }, // Function Key F3
2215 {"OS" , VI_K_FUN4 }, // Function Key F4
2217 {"[A" , VI_K_UP }, // cursor key Up
2218 {"[B" , VI_K_DOWN }, // cursor key Down
2219 {"[C" , VI_K_RIGHT }, // Cursor Key Right
2220 {"[D" , VI_K_LEFT }, // cursor key Left
2221 {"[H" , VI_K_HOME }, // Cursor Key Home
2222 {"[F" , VI_K_END }, // Cursor Key End
2223 {"[1~" , VI_K_HOME }, // Cursor Key Home
2224 {"[2~" , VI_K_INSERT }, // Cursor Key Insert
2225 {"[3~" , VI_K_DELETE }, // Cursor Key Delete
2226 {"[4~" , VI_K_END }, // Cursor Key End
2227 {"[5~" , VI_K_PAGEUP }, // Cursor Key Page Up
2228 {"[6~" , VI_K_PAGEDOWN}, // Cursor Key Page Down
2229 // careful: these have no terminating NUL!
2230 {"[11~", VI_K_FUN1 }, // Function Key F1
2231 {"[12~", VI_K_FUN2 }, // Function Key F2
2232 {"[13~", VI_K_FUN3 }, // Function Key F3
2233 {"[14~", VI_K_FUN4 }, // Function Key F4
2234 {"[15~", VI_K_FUN5 }, // Function Key F5
2235 {"[17~", VI_K_FUN6 }, // Function Key F6
2236 {"[18~", VI_K_FUN7 }, // Function Key F7
2237 {"[19~", VI_K_FUN8 }, // Function Key F8
2238 {"[20~", VI_K_FUN9 }, // Function Key F9
2239 {"[21~", VI_K_FUN10 }, // Function Key F10
2240 {"[23~", VI_K_FUN11 }, // Function Key F11
2241 {"[24~", VI_K_FUN12 }, // Function Key F12
2248 // If no data, block waiting for input.
2249 n = safe_read(0, readbuffer, 1);
2252 place_cursor(rows - 1, 0, FALSE); // go to bottom of screen
2253 clear_to_eol(); // erase to end of line
2254 cookmode(); // terminal to "cooked"
2255 bb_error_msg_and_die("can't read user input");
2259 // Grab character to return from buffer
2261 // Returning NUL from this routine would be bad.
2265 if (n) memmove(readbuffer, readbuffer + 1, n);
2267 // If it's an escape sequence, loop through known matches.
2269 const struct esc_cmds *eindex;
2271 for (eindex = esccmds; eindex < esccmds + ARRAY_SIZE(esccmds); eindex++) {
2272 // n - position in seq to read
2273 int i = 0; // position in seq to compare
2274 int cnt = strnlen(eindex->seq, 4);
2276 // Loop through chars in this sequence.
2278 // We've matched this escape sequence up to [i-1]
2280 // Need more chars, read another one if it wouldn't block.
2281 // (Note that escape sequences come in as a unit,
2282 // so if we would block it's not really an escape sequence.)
2285 pfd.events = POLLIN;
2286 // TODO: what is a good timeout here? why?
2287 if (safe_poll(&pfd, 1, /*timeout:*/ 0)) {
2288 if (safe_read(0, readbuffer + n, 1) <= 0)
2293 // Array is sorted from shortest to longest,
2294 // we can't match anything later in array,
2295 // break out of both loops.
2299 if (readbuffer[i] != eindex->seq[i])
2300 break; // try next seq
2301 if (++i == cnt) { // entire seq matched
2308 // We did not find matching sequence, it was a bare ESC.
2309 // We possibly read and stored more input in readbuffer by now.
2317 //----- IO Routines --------------------------------------------
2318 static char get_one_char(void)
2322 #if ENABLE_FEATURE_VI_DOT_CMD
2324 // we are not adding to the q.
2325 // but, we may be reading from a q
2327 // there is no current q, read from STDIN
2328 c = readit(); // get the users input
2330 // there is a queue to get chars from first
2333 // the end of the q, read from STDIN
2335 ioq_start = ioq = 0;
2336 c = readit(); // get the users input
2340 // adding STDIN chars to q
2341 c = readit(); // get the users input
2342 if (lmc_len >= MAX_INPUT_LEN - 1) {
2343 status_line_bold("last_modifying_cmd overrun");
2345 // add new char to q
2346 last_modifying_cmd[lmc_len++] = c;
2350 c = readit(); // get the users input
2351 #endif /* FEATURE_VI_DOT_CMD */
2355 // Get input line (uses "status line" area)
2356 static char *get_input_line(const char *prompt)
2358 // char [MAX_INPUT_LEN]
2359 #define buf get_input_line__buf
2364 strcpy(buf, prompt);
2365 last_status_cksum = 0; // force status update
2366 place_cursor(rows - 1, 0, FALSE); // go to Status line, bottom of screen
2367 clear_to_eol(); // clear the line
2368 write1(prompt); // write out the :, /, or ? prompt
2371 while (i < MAX_INPUT_LEN) {
2373 if (c == '\n' || c == '\r' || c == 27)
2374 break; // this is end of input
2375 if (c == erase_char || c == 8 || c == 127) {
2376 // user wants to erase prev char
2378 write1("\b \b"); // erase char on screen
2379 if (i <= 0) // user backs up before b-o-l, exit
2392 static int file_size(const char *fn) // what is the byte size of "fn"
2398 if (fn && fn[0] && stat(fn, &st_buf) == 0) // see if file exists
2399 cnt = (int) st_buf.st_size;
2403 static int file_insert(const char *fn, char *p
2404 USE_FEATURE_VI_READONLY(, int update_ro_status))
2408 struct stat statbuf;
2411 if (stat(fn, &statbuf) < 0) {
2412 status_line_bold("\"%s\" %s", fn, strerror(errno));
2415 if (!S_ISREG(statbuf.st_mode)) {
2416 // This is not a regular file
2417 status_line_bold("\"%s\" Not a regular file", fn);
2420 if (p < text || p > end) {
2421 status_line_bold("Trying to insert file outside of memory");
2425 // read file to buffer
2426 fd = open(fn, O_RDONLY);
2428 status_line_bold("\"%s\" %s", fn, strerror(errno));
2431 size = statbuf.st_size;
2432 p = text_hole_make(p, size);
2433 cnt = safe_read(fd, p, size);
2435 status_line_bold("\"%s\" %s", fn, strerror(errno));
2436 p = text_hole_delete(p, p + size - 1); // un-do buffer insert
2437 } else if (cnt < size) {
2438 // There was a partial read, shrink unused space text[]
2439 p = text_hole_delete(p + cnt, p + (size - cnt) - 1); // un-do buffer insert
2440 status_line_bold("cannot read all of file \"%s\"", fn);
2446 #if ENABLE_FEATURE_VI_READONLY
2447 if (update_ro_status
2448 && ((access(fn, W_OK) < 0) ||
2449 /* root will always have access()
2450 * so we check fileperms too */
2451 !(statbuf.st_mode & (S_IWUSR | S_IWGRP | S_IWOTH))
2454 SET_READONLY_FILE(readonly_mode);
2460 static int file_write(char *fn, char *first, char *last)
2462 int fd, cnt, charcnt;
2465 status_line_bold("No current filename");
2469 /* By popular request we do not open file with O_TRUNC,
2470 * but instead ftruncate() it _after_ successful write.
2471 * Might reduce amount of data lost on power fail etc.
2473 fd = open(fn, (O_WRONLY | O_CREAT), 0666);
2476 cnt = last - first + 1;
2477 charcnt = full_write(fd, first, cnt);
2478 ftruncate(fd, charcnt);
2479 if (charcnt == cnt) {
2481 //file_modified = FALSE;
2489 //----- Terminal Drawing ---------------------------------------
2490 // The terminal is made up of 'rows' line of 'columns' columns.
2491 // classically this would be 24 x 80.
2492 // screen coordinates
2498 // 23,0 ... 23,79 <- status line
2500 //----- Move the cursor to row x col (count from 0, not 1) -------
2501 static void place_cursor(int row, int col, int optimize)
2503 char cm1[sizeof(CMrc) + sizeof(int)*3 * 2];
2504 #if ENABLE_FEATURE_VI_OPTIMIZE_CURSOR
2506 SZ_UP = sizeof(CMup),
2507 SZ_DN = sizeof(CMdown),
2508 SEQ_SIZE = SZ_UP > SZ_DN ? SZ_UP : SZ_DN,
2510 char cm2[SEQ_SIZE * 5 + 32]; // bigger than worst case size
2514 if (row < 0) row = 0;
2515 if (row >= rows) row = rows - 1;
2516 if (col < 0) col = 0;
2517 if (col >= columns) col = columns - 1;
2519 //----- 1. Try the standard terminal ESC sequence
2520 sprintf(cm1, CMrc, row + 1, col + 1);
2523 #if ENABLE_FEATURE_VI_OPTIMIZE_CURSOR
2524 if (optimize && col < 16) {
2526 int Rrow = last_row;
2527 int diff = Rrow - row;
2529 if (diff < -5 || diff > 5)
2532 //----- find the minimum # of chars to move cursor -------------
2533 //----- 2. Try moving with discreet chars (Newline, [back]space, ...)
2536 // move to the correct row
2537 while (row < Rrow) {
2538 // the cursor has to move up
2542 while (row > Rrow) {
2543 // the cursor has to move down
2544 strcat(cm2, CMdown);
2548 // now move to the correct column
2549 strcat(cm2, "\r"); // start at col 0
2550 // just send out orignal source char to get to correct place
2551 screenp = &screen[row * columns]; // start of screen line
2552 strncat(cm2, screenp, col);
2554 // pick the shortest cursor motion to send out
2555 if (strlen(cm2) < strlen(cm)) {
2561 #endif /* FEATURE_VI_OPTIMIZE_CURSOR */
2565 //----- Erase from cursor to end of line -----------------------
2566 static void clear_to_eol(void)
2568 write1(Ceol); // Erase from cursor to end of line
2571 //----- Erase from cursor to end of screen -----------------------
2572 static void clear_to_eos(void)
2574 write1(Ceos); // Erase from cursor to end of screen
2577 //----- Start standout mode ------------------------------------
2578 static void standout_start(void) // send "start reverse video" sequence
2580 write1(SOs); // Start reverse video mode
2583 //----- End standout mode --------------------------------------
2584 static void standout_end(void) // send "end reverse video" sequence
2586 write1(SOn); // End reverse video mode
2589 //----- Flash the screen --------------------------------------
2590 static void flash(int h)
2592 standout_start(); // send "start reverse video" sequence
2595 standout_end(); // send "end reverse video" sequence
2599 static void Indicate_Error(void)
2601 #if ENABLE_FEATURE_VI_CRASHME
2603 return; // generate a random command
2606 write1(bell); // send out a bell character
2612 //----- Screen[] Routines --------------------------------------
2613 //----- Erase the Screen[] memory ------------------------------
2614 static void screen_erase(void)
2616 memset(screen, ' ', screensize); // clear new screen
2619 static int bufsum(char *buf, int count)
2622 char *e = buf + count;
2625 sum += (unsigned char) *buf++;
2629 //----- Draw the status line at bottom of the screen -------------
2630 static void show_status_line(void)
2632 int cnt = 0, cksum = 0;
2634 // either we already have an error or status message, or we
2636 if (!have_status_msg) {
2637 cnt = format_edit_status();
2638 cksum = bufsum(status_buffer, cnt);
2640 if (have_status_msg || ((cnt > 0 && last_status_cksum != cksum))) {
2641 last_status_cksum = cksum; // remember if we have seen this line
2642 place_cursor(rows - 1, 0, FALSE); // put cursor on status line
2643 write1(status_buffer);
2645 if (have_status_msg) {
2646 if (((int)strlen(status_buffer) - (have_status_msg - 1)) >
2648 have_status_msg = 0;
2651 have_status_msg = 0;
2653 place_cursor(crow, ccol, FALSE); // put cursor back in correct place
2658 //----- format the status buffer, the bottom line of screen ------
2659 // format status buffer, with STANDOUT mode
2660 static void status_line_bold(const char *format, ...)
2664 va_start(args, format);
2665 strcpy(status_buffer, SOs); // Terminal standout mode on
2666 vsprintf(status_buffer + sizeof(SOs)-1, format, args);
2667 strcat(status_buffer, SOn); // Terminal standout mode off
2670 have_status_msg = 1 + sizeof(SOs) + sizeof(SOn) - 2;
2673 // format status buffer
2674 static void status_line(const char *format, ...)
2678 va_start(args, format);
2679 vsprintf(status_buffer, format, args);
2682 have_status_msg = 1;
2685 // copy s to buf, convert unprintable
2686 static void print_literal(char *buf, const char *s)
2699 c_is_no_print = (c & 0x80) && !Isprint(c);
2700 if (c_is_no_print) {
2704 if (c < ' ' || c == 127) {
2717 if (strlen(buf) > MAX_INPUT_LEN - 10) // paranoia
2722 static void not_implemented(const char *s)
2724 char buf[MAX_INPUT_LEN];
2726 print_literal(buf, s);
2727 status_line_bold("\'%s\' is not implemented", buf);
2730 // show file status on status line
2731 static int format_edit_status(void)
2733 static const char cmd_mode_indicator[] ALIGN1 = "-IR-";
2735 #define tot format_edit_status__tot
2737 int cur, percent, ret, trunc_at;
2739 // file_modified is now a counter rather than a flag. this
2740 // helps reduce the amount of line counting we need to do.
2741 // (this will cause a mis-reporting of modified status
2742 // once every MAXINT editing operations.)
2744 // it would be nice to do a similar optimization here -- if
2745 // we haven't done a motion that could have changed which line
2746 // we're on, then we shouldn't have to do this count_lines()
2747 cur = count_lines(text, dot);
2749 // reduce counting -- the total lines can't have
2750 // changed if we haven't done any edits.
2751 if (file_modified != last_file_modified) {
2752 tot = cur + count_lines(dot, end - 1) - 1;
2753 last_file_modified = file_modified;
2756 // current line percent
2757 // ------------- ~~ ----------
2760 percent = (100 * cur) / tot;
2766 trunc_at = columns < STATUS_BUFFER_LEN-1 ?
2767 columns : STATUS_BUFFER_LEN-1;
2769 ret = snprintf(status_buffer, trunc_at+1,
2770 #if ENABLE_FEATURE_VI_READONLY
2771 "%c %s%s%s %d/%d %d%%",
2773 "%c %s%s %d/%d %d%%",
2775 cmd_mode_indicator[cmd_mode & 3],
2776 (current_filename != NULL ? current_filename : "No file"),
2777 #if ENABLE_FEATURE_VI_READONLY
2778 (readonly_mode ? " [Readonly]" : ""),
2780 (file_modified ? " [Modified]" : ""),
2783 if (ret >= 0 && ret < trunc_at)
2784 return ret; /* it all fit */
2786 return trunc_at; /* had to truncate */
2790 //----- Force refresh of all Lines -----------------------------
2791 static void redraw(int full_screen)
2793 place_cursor(0, 0, FALSE); // put cursor in correct place
2794 clear_to_eos(); // tell terminal to erase display
2795 screen_erase(); // erase the internal screen buffer
2796 last_status_cksum = 0; // force status update
2797 refresh(full_screen); // this will redraw the entire display
2801 //----- Format a text[] line into a buffer ---------------------
2802 static char* format_line(char *src /*, int li*/)
2807 char *dest = scr_out_buf; // [MAX_SCR_COLS + MAX_TABSTOP * 2]
2809 c = '~'; // char in col 0 in non-existent lines is '~'
2811 while (co < columns + tabstop) {
2812 // have we gone past the end?
2817 if ((c & 0x80) && !Isprint(c)) {
2820 if (c < ' ' || c == 0x7f) {
2824 while ((co % tabstop) != (tabstop - 1)) {
2832 c += '@'; // Ctrl-X -> 'X'
2837 // discard scrolled-off-to-the-left portion,
2838 // in tabstop-sized pieces
2839 if (ofs >= tabstop && co >= tabstop) {
2840 memmove(dest, dest + tabstop, co);
2847 // check "short line, gigantic offset" case
2850 // discard last scrolled off part
2853 // fill the rest with spaces
2855 memset(&dest[co], ' ', columns - co);
2859 //----- Refresh the changed screen lines -----------------------
2860 // Copy the source line from text[] into the buffer and note
2861 // if the current screenline is different from the new buffer.
2862 // If they differ then that line needs redrawing on the terminal.
2864 static void refresh(int full_screen)
2866 #define old_offset refresh__old_offset
2869 char *tp, *sp; // pointer into text[] and screen[]
2871 if (ENABLE_FEATURE_VI_WIN_RESIZE) {
2872 unsigned c = columns, r = rows;
2873 get_terminal_width_height(0, &columns, &rows);
2874 if (rows > MAX_SCR_ROWS) rows = MAX_SCR_ROWS;
2875 if (columns > MAX_SCR_COLS) columns = MAX_SCR_COLS;
2876 full_screen |= (c - columns) | (r - rows);
2878 sync_cursor(dot, &crow, &ccol); // where cursor will be (on "dot")
2879 tp = screenbegin; // index into text[] of top line
2881 // compare text[] to screen[] and mark screen[] lines that need updating
2882 for (li = 0; li < rows - 1; li++) {
2883 int cs, ce; // column start & end
2885 // format current text line
2886 out_buf = format_line(tp /*, li*/);
2888 // skip to the end of the current text[] line
2890 char *t = memchr(tp, '\n', end - tp);
2891 if (!t) t = end - 1;
2895 // see if there are any changes between vitual screen and out_buf
2896 changed = FALSE; // assume no change
2899 sp = &screen[li * columns]; // start of screen line
2901 // force re-draw of every single column from 0 - columns-1
2904 // compare newly formatted buffer with virtual screen
2905 // look forward for first difference between buf and screen
2906 for (; cs <= ce; cs++) {
2907 if (out_buf[cs] != sp[cs]) {
2908 changed = TRUE; // mark for redraw
2913 // look backward for last difference between out_buf and screen
2914 for (; ce >= cs; ce--) {
2915 if (out_buf[ce] != sp[ce]) {
2916 changed = TRUE; // mark for redraw
2920 // now, cs is index of first diff, and ce is index of last diff
2922 // if horz offset has changed, force a redraw
2923 if (offset != old_offset) {
2928 // make a sanity check of columns indexes
2930 if (ce > columns - 1) ce = columns - 1;
2931 if (cs > ce) { cs = 0; ce = columns - 1; }
2932 // is there a change between vitual screen and out_buf
2934 // copy changed part of buffer to virtual screen
2935 memcpy(sp+cs, out_buf+cs, ce-cs+1);
2937 // move cursor to column of first change
2938 //if (offset != old_offset) {
2939 // // place_cursor is still too stupid
2940 // // to handle offsets correctly
2941 // place_cursor(li, cs, FALSE);
2943 place_cursor(li, cs, TRUE);
2946 // write line out to terminal
2947 fwrite(&sp[cs], ce - cs + 1, 1, stdout);
2951 place_cursor(crow, ccol, TRUE);
2953 old_offset = offset;
2957 //---------------------------------------------------------------------
2958 //----- the Ascii Chart -----------------------------------------------
2960 // 00 nul 01 soh 02 stx 03 etx 04 eot 05 enq 06 ack 07 bel
2961 // 08 bs 09 ht 0a nl 0b vt 0c np 0d cr 0e so 0f si
2962 // 10 dle 11 dc1 12 dc2 13 dc3 14 dc4 15 nak 16 syn 17 etb
2963 // 18 can 19 em 1a sub 1b esc 1c fs 1d gs 1e rs 1f us
2964 // 20 sp 21 ! 22 " 23 # 24 $ 25 % 26 & 27 '
2965 // 28 ( 29 ) 2a * 2b + 2c , 2d - 2e . 2f /
2966 // 30 0 31 1 32 2 33 3 34 4 35 5 36 6 37 7
2967 // 38 8 39 9 3a : 3b ; 3c < 3d = 3e > 3f ?
2968 // 40 @ 41 A 42 B 43 C 44 D 45 E 46 F 47 G
2969 // 48 H 49 I 4a J 4b K 4c L 4d M 4e N 4f O
2970 // 50 P 51 Q 52 R 53 S 54 T 55 U 56 V 57 W
2971 // 58 X 59 Y 5a Z 5b [ 5c \ 5d ] 5e ^ 5f _
2972 // 60 ` 61 a 62 b 63 c 64 d 65 e 66 f 67 g
2973 // 68 h 69 i 6a j 6b k 6c l 6d m 6e n 6f o
2974 // 70 p 71 q 72 r 73 s 74 t 75 u 76 v 77 w
2975 // 78 x 79 y 7a z 7b { 7c | 7d } 7e ~ 7f del
2976 //---------------------------------------------------------------------
2978 //----- Execute a Vi Command -----------------------------------
2979 static void do_cmd(char c)
2981 const char *msg = msg; // for compiler
2982 char c1, *p, *q, *save_dot;
2984 int dir = dir; // for compiler
2987 // c1 = c; // quiet the compiler
2988 // cnt = yf = 0; // quiet the compiler
2989 // msg = p = q = save_dot = buf; // quiet the compiler
2990 memset(buf, '\0', 12);
2994 /* if this is a cursor key, skip these checks */
3007 if (cmd_mode == 2) {
3008 // flip-flop Insert/Replace mode
3009 if (c == VI_K_INSERT)
3011 // we are 'R'eplacing the current *dot with new char
3013 // don't Replace past E-o-l
3014 cmd_mode = 1; // convert to insert
3016 if (1 <= c || Isprint(c)) {
3018 dot = yank_delete(dot, dot, 0, YANKDEL); // delete char
3019 dot = char_insert(dot, c); // insert new char
3024 if (cmd_mode == 1) {
3025 // hitting "Insert" twice means "R" replace mode
3026 if (c == VI_K_INSERT) goto dc5;
3027 // insert the char c at "dot"
3028 if (1 <= c || Isprint(c)) {
3029 dot = char_insert(dot, c);
3044 #if ENABLE_FEATURE_VI_CRASHME
3045 case 0x14: // dc4 ctrl-T
3046 crashme = (crashme == 0) ? 1 : 0;
3075 //case 'u': // u- FIXME- there is no undo
3077 default: // unrecognised command
3085 not_implemented(buf);
3086 end_cmd_q(); // stop adding to q
3087 case 0x00: // nul- ignore
3089 case 2: // ctrl-B scroll up full screen
3090 case VI_K_PAGEUP: // Cursor Key Page Up
3091 dot_scroll(rows - 2, -1);
3093 case 4: // ctrl-D scroll down half screen
3094 dot_scroll((rows - 2) / 2, 1);
3096 case 5: // ctrl-E scroll down one line
3099 case 6: // ctrl-F scroll down full screen
3100 case VI_K_PAGEDOWN: // Cursor Key Page Down
3101 dot_scroll(rows - 2, 1);
3103 case 7: // ctrl-G show current status
3104 last_status_cksum = 0; // force status update
3106 case 'h': // h- move left
3107 case VI_K_LEFT: // cursor key Left
3108 case 8: // ctrl-H- move left (This may be ERASE char)
3109 case 0x7f: // DEL- move left (This may be ERASE char)
3115 case 10: // Newline ^J
3116 case 'j': // j- goto next line, same col
3117 case VI_K_DOWN: // cursor key Down
3121 dot_next(); // go to next B-o-l
3122 dot = move_to_col(dot, ccol + offset); // try stay in same col
3124 case 12: // ctrl-L force redraw whole screen
3125 case 18: // ctrl-R force redraw
3126 place_cursor(0, 0, FALSE); // put cursor in correct place
3127 clear_to_eos(); // tel terminal to erase display
3129 screen_erase(); // erase the internal screen buffer
3130 last_status_cksum = 0; // force status update
3131 refresh(TRUE); // this will redraw the entire display
3133 case 13: // Carriage Return ^M
3134 case '+': // +- goto next line
3141 case 21: // ctrl-U scroll up half screen
3142 dot_scroll((rows - 2) / 2, -1);
3144 case 25: // ctrl-Y scroll up one line
3150 cmd_mode = 0; // stop insrting
3152 last_status_cksum = 0; // force status update
3154 case ' ': // move right
3155 case 'l': // move right
3156 case VI_K_RIGHT: // Cursor Key Right
3162 #if ENABLE_FEATURE_VI_YANKMARK
3163 case '"': // "- name a register to use for Delete/Yank
3164 c1 = get_one_char();
3172 case '\'': // '- goto a specific mark
3173 c1 = get_one_char();
3178 q = mark[(unsigned char) c1];
3179 if (text <= q && q < end) {
3181 dot_begin(); // go to B-o-l
3184 } else if (c1 == '\'') { // goto previous context
3185 dot = swap_context(dot); // swap current and previous context
3186 dot_begin(); // go to B-o-l
3192 case 'm': // m- Mark a line
3193 // this is really stupid. If there are any inserts or deletes
3194 // between text[0] and dot then this mark will not point to the
3195 // correct location! It could be off by many lines!
3196 // Well..., at least its quick and dirty.
3197 c1 = get_one_char();
3201 // remember the line
3202 mark[(int) c1] = dot;
3207 case 'P': // P- Put register before
3208 case 'p': // p- put register after
3211 status_line_bold("Nothing in register %c", what_reg());
3214 // are we putting whole lines or strings
3215 if (strchr(p, '\n') != NULL) {
3217 dot_begin(); // putting lines- Put above
3220 // are we putting after very last line?
3221 if (end_line(dot) == (end - 1)) {
3222 dot = end; // force dot to end of text[]
3224 dot_next(); // next line, then put before
3229 dot_right(); // move to right, can move to NL
3231 dot = string_insert(dot, p); // insert the string
3232 end_cmd_q(); // stop adding to q
3234 case 'U': // U- Undo; replace current line with original version
3235 if (reg[Ureg] != 0) {
3236 p = begin_line(dot);
3238 p = text_hole_delete(p, q); // delete cur line
3239 p = string_insert(p, reg[Ureg]); // insert orig line
3244 #endif /* FEATURE_VI_YANKMARK */
3245 case '$': // $- goto end of line
3246 case VI_K_END: // Cursor Key End
3250 dot = end_line(dot);
3252 case '%': // %- find matching char of pair () [] {}
3253 for (q = dot; q < end && *q != '\n'; q++) {
3254 if (strchr("()[]{}", *q) != NULL) {
3255 // we found half of a pair
3256 p = find_pair(q, *q);
3268 case 'f': // f- forward to a user specified char
3269 last_forward_char = get_one_char(); // get the search char
3271 // dont separate these two commands. 'f' depends on ';'
3273 //**** fall through to ... ';'
3274 case ';': // ;- look at rest of line for last forward char
3278 if (last_forward_char == 0)
3281 while (q < end - 1 && *q != '\n' && *q != last_forward_char) {
3284 if (*q == last_forward_char)
3287 case ',': // repeat latest 'f' in opposite direction
3291 if (last_forward_char == 0)
3294 while (q >= text && *q != '\n' && *q != last_forward_char) {
3297 if (q >= text && *q == last_forward_char)
3301 case '-': // -- goto prev line
3308 #if ENABLE_FEATURE_VI_DOT_CMD
3309 case '.': // .- repeat the last modifying command
3310 // Stuff the last_modifying_cmd back into stdin
3311 // and let it be re-executed.
3313 last_modifying_cmd[lmc_len] = 0;
3314 ioq = ioq_start = xstrdup(last_modifying_cmd);
3318 #if ENABLE_FEATURE_VI_SEARCH
3319 case '?': // /- search for a pattern
3320 case '/': // /- search for a pattern
3323 q = get_input_line(buf); // get input line- use "status line"
3324 if (q[0] && !q[1]) {
3325 if (last_search_pattern[0])
3326 last_search_pattern[0] = c;
3327 goto dc3; // if no pat re-use old pat
3329 if (q[0]) { // strlen(q) > 1: new pat- save it and find
3330 // there is a new pat
3331 free(last_search_pattern);
3332 last_search_pattern = xstrdup(q);
3333 goto dc3; // now find the pattern
3335 // user changed mind and erased the "/"- do nothing
3337 case 'N': // N- backward search for last pattern
3341 dir = BACK; // assume BACKWARD search
3343 if (last_search_pattern[0] == '?') {
3347 goto dc4; // now search for pattern
3349 case 'n': // n- repeat search for last pattern
3350 // search rest of text[] starting at next char
3351 // if search fails return orignal "p" not the "p+1" address
3356 if (last_search_pattern == 0) {
3357 msg = "No previous regular expression";
3360 if (last_search_pattern[0] == '/') {
3361 dir = FORWARD; // assume FORWARD search
3364 if (last_search_pattern[0] == '?') {
3369 q = char_search(p, last_search_pattern + 1, dir, FULL);
3371 dot = q; // good search, update "dot"
3375 // no pattern found between "dot" and "end"- continue at top
3380 q = char_search(p, last_search_pattern + 1, dir, FULL);
3381 if (q != NULL) { // found something
3382 dot = q; // found new pattern- goto it
3383 msg = "search hit BOTTOM, continuing at TOP";
3385 msg = "search hit TOP, continuing at BOTTOM";
3388 msg = "Pattern not found";
3392 status_line_bold("%s", msg);
3394 case '{': // {- move backward paragraph
3395 q = char_search(dot, "\n\n", BACK, FULL);
3396 if (q != NULL) { // found blank line
3397 dot = next_line(q); // move to next blank line
3400 case '}': // }- move forward paragraph
3401 q = char_search(dot, "\n\n", FORWARD, FULL);
3402 if (q != NULL) { // found blank line
3403 dot = next_line(q); // move to next blank line
3406 #endif /* FEATURE_VI_SEARCH */
3407 case '0': // 0- goto begining of line
3417 if (c == '0' && cmdcnt < 1) {
3418 dot_begin(); // this was a standalone zero
3420 cmdcnt = cmdcnt * 10 + (c - '0'); // this 0 is part of a number
3423 case ':': // :- the colon mode commands
3424 p = get_input_line(":"); // get input line- use "status line"
3425 #if ENABLE_FEATURE_VI_COLON
3426 colon(p); // execute the command
3429 p++; // move past the ':'
3433 if (strncasecmp(p, "quit", cnt) == 0
3434 || strncasecmp(p, "q!", cnt) == 0 // delete lines
3436 if (file_modified && p[1] != '!') {
3437 status_line_bold("No write since last change (:quit! overrides)");
3441 } else if (strncasecmp(p, "write", cnt) == 0
3442 || strncasecmp(p, "wq", cnt) == 0
3443 || strncasecmp(p, "wn", cnt) == 0
3444 || strncasecmp(p, "x", cnt) == 0
3446 cnt = file_write(current_filename, text, end - 1);
3449 status_line_bold("Write error: %s", strerror(errno));
3452 last_file_modified = -1;
3453 status_line("\"%s\" %dL, %dC", current_filename, count_lines(text, end - 1), cnt);
3454 if (p[0] == 'x' || p[1] == 'q' || p[1] == 'n'
3455 || p[0] == 'X' || p[1] == 'Q' || p[1] == 'N'
3460 } else if (strncasecmp(p, "file", cnt) == 0) {
3461 last_status_cksum = 0; // force status update
3462 } else if (sscanf(p, "%d", &j) > 0) {
3463 dot = find_line(j); // go to line # j
3465 } else { // unrecognised cmd
3468 #endif /* !FEATURE_VI_COLON */
3470 case '<': // <- Left shift something
3471 case '>': // >- Right shift something
3472 cnt = count_lines(text, dot); // remember what line we are on
3473 c1 = get_one_char(); // get the type of thing to delete
3474 find_range(&p, &q, c1);
3475 yank_delete(p, q, 1, YANKONLY); // save copy before change
3478 i = count_lines(p, q); // # of lines we are shifting
3479 for ( ; i > 0; i--, p = next_line(p)) {
3481 // shift left- remove tab or 8 spaces
3483 // shrink buffer 1 char
3484 text_hole_delete(p, p);
3485 } else if (*p == ' ') {
3486 // we should be calculating columns, not just SPACE
3487 for (j = 0; *p == ' ' && j < tabstop; j++) {
3488 text_hole_delete(p, p);
3491 } else if (c == '>') {
3492 // shift right -- add tab or 8 spaces
3493 char_insert(p, '\t');
3496 dot = find_line(cnt); // what line were we on
3498 end_cmd_q(); // stop adding to q
3500 case 'A': // A- append at e-o-l
3501 dot_end(); // go to e-o-l
3502 //**** fall through to ... 'a'
3503 case 'a': // a- append after current char
3508 case 'B': // B- back a blank-delimited Word
3509 case 'E': // E- end of a blank-delimited word
3510 case 'W': // W- forward a blank-delimited word
3517 if (c == 'W' || isspace(dot[dir])) {
3518 dot = skip_thing(dot, 1, dir, S_TO_WS);
3519 dot = skip_thing(dot, 2, dir, S_OVER_WS);
3522 dot = skip_thing(dot, 1, dir, S_BEFORE_WS);
3524 case 'C': // C- Change to e-o-l
3525 case 'D': // D- delete to e-o-l
3527 dot = dollar_line(dot); // move to before NL
3528 // copy text into a register and delete
3529 dot = yank_delete(save_dot, dot, 0, YANKDEL); // delete to e-o-l
3531 goto dc_i; // start inserting
3532 #if ENABLE_FEATURE_VI_DOT_CMD
3534 end_cmd_q(); // stop adding to q
3537 case 'g': // 'gg' goto a line number (from vim)
3538 // (default to first line in file)
3539 c1 = get_one_char();
3544 not_implemented(buf);
3550 case 'G': // G- goto to a line number (default= E-O-F)
3551 dot = end - 1; // assume E-O-F
3553 dot = find_line(cmdcnt); // what line is #cmdcnt
3557 case 'H': // H- goto top line on screen
3559 if (cmdcnt > (rows - 1)) {
3560 cmdcnt = (rows - 1);
3567 case 'I': // I- insert before first non-blank
3570 //**** fall through to ... 'i'
3571 case 'i': // i- insert before current char
3572 case VI_K_INSERT: // Cursor Key Insert
3574 cmd_mode = 1; // start insrting
3576 case 'J': // J- join current and next lines together
3580 dot_end(); // move to NL
3581 if (dot < end - 1) { // make sure not last char in text[]
3582 *dot++ = ' '; // replace NL with space
3584 while (isblank(*dot)) { // delete leading WS
3588 end_cmd_q(); // stop adding to q
3590 case 'L': // L- goto bottom line on screen
3592 if (cmdcnt > (rows - 1)) {
3593 cmdcnt = (rows - 1);
3601 case 'M': // M- goto middle line on screen
3603 for (cnt = 0; cnt < (rows-1) / 2; cnt++)
3604 dot = next_line(dot);
3606 case 'O': // O- open a empty line above
3608 p = begin_line(dot);
3609 if (p[-1] == '\n') {
3611 case 'o': // o- open a empty line below; Yes, I know it is in the middle of the "if (..."
3613 dot = char_insert(dot, '\n');
3616 dot = char_insert(dot, '\n'); // i\n ESC
3621 case 'R': // R- continuous Replace char
3628 case 'X': // X- delete char before dot
3629 case 'x': // x- delete the current char
3630 case 's': // s- substitute the current char
3637 if (dot[dir] != '\n') {
3639 dot--; // delete prev char
3640 dot = yank_delete(dot, dot, 0, YANKDEL); // delete char
3643 goto dc_i; // start insrting
3644 end_cmd_q(); // stop adding to q
3646 case 'Z': // Z- if modified, {write}; exit
3647 // ZZ means to save file (if necessary), then exit
3648 c1 = get_one_char();
3653 if (file_modified) {
3654 if (ENABLE_FEATURE_VI_READONLY && readonly_mode) {
3655 status_line_bold("\"%s\" File is read only", current_filename);
3658 cnt = file_write(current_filename, text, end - 1);
3661 status_line_bold("Write error: %s", strerror(errno));
3662 } else if (cnt == (end - 1 - text + 1)) {
3669 case '^': // ^- move to first non-blank on line
3673 case 'b': // b- back a word
3674 case 'e': // e- end of word
3681 if ((dot + dir) < text || (dot + dir) > end - 1)
3684 if (isspace(*dot)) {
3685 dot = skip_thing(dot, (c == 'e') ? 2 : 1, dir, S_OVER_WS);
3687 if (isalnum(*dot) || *dot == '_') {
3688 dot = skip_thing(dot, 1, dir, S_END_ALNUM);
3689 } else if (ispunct(*dot)) {
3690 dot = skip_thing(dot, 1, dir, S_END_PUNCT);
3693 case 'c': // c- change something
3694 case 'd': // d- delete something
3695 #if ENABLE_FEATURE_VI_YANKMARK
3696 case 'y': // y- yank something
3697 case 'Y': // Y- Yank a line
3700 int yf, ml, whole = 0;
3701 yf = YANKDEL; // assume either "c" or "d"
3702 #if ENABLE_FEATURE_VI_YANKMARK
3703 if (c == 'y' || c == 'Y')
3708 c1 = get_one_char(); // get the type of thing to delete
3709 // determine range, and whether it spans lines
3710 ml = find_range(&p, &q, c1);
3711 if (c1 == 27) { // ESC- user changed mind and wants out
3712 c = c1 = 27; // Escape- do nothing
3713 } else if (strchr("wW", c1)) {
3715 // don't include trailing WS as part of word
3716 while (isblank(*q)) {
3717 if (q <= text || q[-1] == '\n')
3722 dot = yank_delete(p, q, ml, yf); // delete word
3723 } else if (strchr("^0bBeEft%$ lh\b\177", c1)) {
3724 // partial line copy text into a register and delete
3725 dot = yank_delete(p, q, ml, yf); // delete word
3726 } else if (strchr("cdykjHL+-{}\r\n", c1)) {
3727 // whole line copy text into a register and delete
3728 dot = yank_delete(p, q, ml, yf); // delete lines
3731 // could not recognize object
3732 c = c1 = 27; // error-
3738 dot = char_insert(dot, '\n');
3739 // on the last line of file don't move to prev line
3740 if (whole && dot != (end-1)) {
3743 } else if (c == 'd') {
3749 // if CHANGING, not deleting, start inserting after the delete
3751 strcpy(buf, "Change");
3752 goto dc_i; // start inserting
3755 strcpy(buf, "Delete");
3757 #if ENABLE_FEATURE_VI_YANKMARK
3758 if (c == 'y' || c == 'Y') {
3759 strcpy(buf, "Yank");
3763 for (cnt = 0; p <= q; p++) {
3767 status_line("%s %d lines (%d chars) using [%c]",
3768 buf, cnt, strlen(reg[YDreg]), what_reg());
3770 end_cmd_q(); // stop adding to q
3774 case 'k': // k- goto prev line, same col
3775 case VI_K_UP: // cursor key Up
3780 dot = move_to_col(dot, ccol + offset); // try stay in same col
3782 case 'r': // r- replace the current char with user input
3783 c1 = get_one_char(); // get the replacement char
3788 end_cmd_q(); // stop adding to q
3790 case 't': // t- move to char prior to next x
3791 last_forward_char = get_one_char();
3793 if (*dot == last_forward_char)
3795 last_forward_char= 0;
3797 case 'w': // w- forward a word
3801 if (isalnum(*dot) || *dot == '_') { // we are on ALNUM
3802 dot = skip_thing(dot, 1, FORWARD, S_END_ALNUM);
3803 } else if (ispunct(*dot)) { // we are on PUNCT
3804 dot = skip_thing(dot, 1, FORWARD, S_END_PUNCT);
3807 dot++; // move over word
3808 if (isspace(*dot)) {
3809 dot = skip_thing(dot, 2, FORWARD, S_OVER_WS);
3813 c1 = get_one_char(); // get the replacement char
3816 cnt = (rows - 2) / 2; // put dot at center
3818 cnt = rows - 2; // put dot at bottom
3819 screenbegin = begin_line(dot); // start dot at top
3820 dot_scroll(cnt, -1);
3822 case '|': // |- move to column "cmdcnt"
3823 dot = move_to_col(dot, cmdcnt - 1); // try to move to column
3825 case '~': // ~- flip the case of letters a-z -> A-Z
3829 if (islower(*dot)) {
3830 *dot = toupper(*dot);
3832 } else if (isupper(*dot)) {
3833 *dot = tolower(*dot);
3837 end_cmd_q(); // stop adding to q
3839 //----- The Cursor and Function Keys -----------------------------
3840 case VI_K_HOME: // Cursor Key Home
3843 // The Fn keys could point to do_macro which could translate them
3844 case VI_K_FUN1: // Function Key F1
3845 case VI_K_FUN2: // Function Key F2
3846 case VI_K_FUN3: // Function Key F3
3847 case VI_K_FUN4: // Function Key F4
3848 case VI_K_FUN5: // Function Key F5
3849 case VI_K_FUN6: // Function Key F6
3850 case VI_K_FUN7: // Function Key F7
3851 case VI_K_FUN8: // Function Key F8
3852 case VI_K_FUN9: // Function Key F9
3853 case VI_K_FUN10: // Function Key F10
3854 case VI_K_FUN11: // Function Key F11
3855 case VI_K_FUN12: // Function Key F12
3860 // if text[] just became empty, add back an empty line
3862 char_insert(text, '\n'); // start empty buf with dummy line
3865 // it is OK for dot to exactly equal to end, otherwise check dot validity
3867 dot = bound_dot(dot); // make sure "dot" is valid
3869 #if ENABLE_FEATURE_VI_YANKMARK
3870 check_context(c); // update the current context
3874 cmdcnt = 0; // cmd was not a number, reset cmdcnt
3875 cnt = dot - begin_line(dot);
3876 // Try to stay off of the Newline
3877 if (*dot == '\n' && cnt > 0 && cmd_mode == 0)
3881 /* NB! the CRASHME code is unmaintained, and doesn't currently build */
3882 #if ENABLE_FEATURE_VI_CRASHME
3883 static int totalcmds = 0;
3884 static int Mp = 85; // Movement command Probability
3885 static int Np = 90; // Non-movement command Probability
3886 static int Dp = 96; // Delete command Probability
3887 static int Ip = 97; // Insert command Probability
3888 static int Yp = 98; // Yank command Probability
3889 static int Pp = 99; // Put command Probability
3890 static int M = 0, N = 0, I = 0, D = 0, Y = 0, P = 0, U = 0;
3891 static const char chars[20] = "\t012345 abcdABCD-=.$";
3892 static const char *const words[20] = {
3893 "this", "is", "a", "test",
3894 "broadcast", "the", "emergency", "of",
3895 "system", "quick", "brown", "fox",
3896 "jumped", "over", "lazy", "dogs",
3897 "back", "January", "Febuary", "March"
3899 static const char *const lines[20] = {
3900 "You should have received a copy of the GNU General Public License\n",
3901 "char c, cm, *cmd, *cmd1;\n",
3902 "generate a command by percentages\n",
3903 "Numbers may be typed as a prefix to some commands.\n",
3904 "Quit, discarding changes!\n",
3905 "Forced write, if permission originally not valid.\n",
3906 "In general, any ex or ed command (such as substitute or delete).\n",
3907 "I have tickets available for the Blazers vs LA Clippers for Monday, Janurary 1 at 1:00pm.\n",
3908 "Please get w/ me and I will go over it with you.\n",
3909 "The following is a list of scheduled, committed changes.\n",
3910 "1. Launch Norton Antivirus (Start, Programs, Norton Antivirus)\n",
3911 "Reminder....Town Meeting in Central Perk cafe today at 3:00pm.\n",
3912 "Any question about transactions please contact Sterling Huxley.\n",
3913 "I will try to get back to you by Friday, December 31.\n",
3914 "This Change will be implemented on Friday.\n",
3915 "Let me know if you have problems accessing this;\n",
3916 "Sterling Huxley recently added you to the access list.\n",
3917 "Would you like to go to lunch?\n",
3918 "The last command will be automatically run.\n",
3919 "This is too much english for a computer geek.\n",
3921 static char *multilines[20] = {
3922 "You should have received a copy of the GNU General Public License\n",
3923 "char c, cm, *cmd, *cmd1;\n",
3924 "generate a command by percentages\n",
3925 "Numbers may be typed as a prefix to some commands.\n",
3926 "Quit, discarding changes!\n",
3927 "Forced write, if permission originally not valid.\n",
3928 "In general, any ex or ed command (such as substitute or delete).\n",
3929 "I have tickets available for the Blazers vs LA Clippers for Monday, Janurary 1 at 1:00pm.\n",
3930 "Please get w/ me and I will go over it with you.\n",
3931 "The following is a list of scheduled, committed changes.\n",
3932 "1. Launch Norton Antivirus (Start, Programs, Norton Antivirus)\n",
3933 "Reminder....Town Meeting in Central Perk cafe today at 3:00pm.\n",
3934 "Any question about transactions please contact Sterling Huxley.\n",
3935 "I will try to get back to you by Friday, December 31.\n",
3936 "This Change will be implemented on Friday.\n",
3937 "Let me know if you have problems accessing this;\n",
3938 "Sterling Huxley recently added you to the access list.\n",
3939 "Would you like to go to lunch?\n",
3940 "The last command will be automatically run.\n",
3941 "This is too much english for a computer geek.\n",
3944 // create a random command to execute
3945 static void crash_dummy()
3947 static int sleeptime; // how long to pause between commands
3948 char c, cm, *cmd, *cmd1;
3949 int i, cnt, thing, rbi, startrbi, percent;
3951 // "dot" movement commands
3952 cmd1 = " \n\r\002\004\005\006\025\0310^$-+wWeEbBhjklHL";
3954 // is there already a command running?
3955 if (chars_to_parse > 0)
3959 sleeptime = 0; // how long to pause between commands
3960 memset(readbuffer, '\0', sizeof(readbuffer));
3961 // generate a command by percentages
3962 percent = (int) lrand48() % 100; // get a number from 0-99
3963 if (percent < Mp) { // Movement commands
3964 // available commands
3967 } else if (percent < Np) { // non-movement commands
3968 cmd = "mz<>\'\""; // available commands
3970 } else if (percent < Dp) { // Delete commands
3971 cmd = "dx"; // available commands
3973 } else if (percent < Ip) { // Inset commands
3974 cmd = "iIaAsrJ"; // available commands
3976 } else if (percent < Yp) { // Yank commands
3977 cmd = "yY"; // available commands
3979 } else if (percent < Pp) { // Put commands
3980 cmd = "pP"; // available commands
3983 // We do not know how to handle this command, try again
3987 // randomly pick one of the available cmds from "cmd[]"
3988 i = (int) lrand48() % strlen(cmd);
3990 if (strchr(":\024", cm))
3991 goto cd0; // dont allow colon or ctrl-T commands
3992 readbuffer[rbi++] = cm; // put cmd into input buffer
3994 // now we have the command-
3995 // there are 1, 2, and multi char commands
3996 // find out which and generate the rest of command as necessary
3997 if (strchr("dmryz<>\'\"", cm)) { // 2-char commands
3998 cmd1 = " \n\r0$^-+wWeEbBhjklHL";
3999 if (cm == 'm' || cm == '\'' || cm == '\"') { // pick a reg[]
4000 cmd1 = "abcdefghijklmnopqrstuvwxyz";
4002 thing = (int) lrand48() % strlen(cmd1); // pick a movement command
4004 readbuffer[rbi++] = c; // add movement to input buffer
4006 if (strchr("iIaAsc", cm)) { // multi-char commands
4008 // change some thing
4009 thing = (int) lrand48() % strlen(cmd1); // pick a movement command
4011 readbuffer[rbi++] = c; // add movement to input buffer
4013 thing = (int) lrand48() % 4; // what thing to insert
4014 cnt = (int) lrand48() % 10; // how many to insert
4015 for (i = 0; i < cnt; i++) {
4016 if (thing == 0) { // insert chars
4017 readbuffer[rbi++] = chars[((int) lrand48() % strlen(chars))];
4018 } else if (thing == 1) { // insert words
4019 strcat(readbuffer, words[(int) lrand48() % 20]);
4020 strcat(readbuffer, " ");
4021 sleeptime = 0; // how fast to type
4022 } else if (thing == 2) { // insert lines
4023 strcat(readbuffer, lines[(int) lrand48() % 20]);
4024 sleeptime = 0; // how fast to type
4025 } else { // insert multi-lines
4026 strcat(readbuffer, multilines[(int) lrand48() % 20]);
4027 sleeptime = 0; // how fast to type
4030 strcat(readbuffer, "\033");
4032 chars_to_parse = strlen(readbuffer);
4036 mysleep(sleeptime); // sleep 1/100 sec
4039 // test to see if there are any errors
4040 static void crash_test()
4042 static time_t oldtim;
4049 strcat(msg, "end<text ");
4051 if (end > textend) {
4052 strcat(msg, "end>textend ");
4055 strcat(msg, "dot<text ");
4058 strcat(msg, "dot>end ");
4060 if (screenbegin < text) {
4061 strcat(msg, "screenbegin<text ");
4063 if (screenbegin > end - 1) {
4064 strcat(msg, "screenbegin>end-1 ");
4068 printf("\n\n%d: \'%c\' %s\n\n\n%s[Hit return to continue]%s",
4069 totalcmds, last_input_char, msg, SOs, SOn);
4071 while (safe_read(STDIN_FILENO, d, 1) > 0) {
4072 if (d[0] == '\n' || d[0] == '\r')
4077 if (tim >= (oldtim + 3)) {
4078 sprintf(status_buffer,
4079 "Tot=%d: M=%d N=%d I=%d D=%d Y=%d P=%d U=%d size=%d",
4080 totalcmds, M, N, I, D, Y, P, U, end - text + 1);