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";
99 #if ENABLE_FEATURE_VI_DOT_CMD || ENABLE_FEATURE_VI_YANKMARK
100 // cmds modifying text[]
101 // vda: removed "aAiIs" as they switch us into insert mode
102 // and remembering input for replay after them makes no sense
103 static const char modifying_cmds[] = "cCdDJoOpPrRxX<>~";
109 FORWARD = 1, // code depends on "1" for array index
110 BACK = -1, // code depends on "-1" for array index
111 LIMITED = 0, // how much of text[] in char_search
112 FULL = 1, // how much of text[] in char_search
114 S_BEFORE_WS = 1, // used in skip_thing() for moving "dot"
115 S_TO_WS = 2, // used in skip_thing() for moving "dot"
116 S_OVER_WS = 3, // used in skip_thing() for moving "dot"
117 S_END_PUNCT = 4, // used in skip_thing() for moving "dot"
118 S_END_ALNUM = 5, // used in skip_thing() for moving "dot"
122 /* vi.c expects chars to be unsigned. */
123 /* busybox build system provides that, but it's better */
124 /* to audit and fix the source */
127 /* many references - keep near the top of globals */
128 char *text, *end; // pointers to the user data in memory
129 char *dot; // where all the action takes place
130 int text_size; // size of the allocated buffer
134 #define VI_AUTOINDENT 1
135 #define VI_SHOWMATCH 2
136 #define VI_IGNORECASE 4
137 #define VI_ERR_METHOD 8
138 #define autoindent (vi_setops & VI_AUTOINDENT)
139 #define showmatch (vi_setops & VI_SHOWMATCH )
140 #define ignorecase (vi_setops & VI_IGNORECASE)
141 /* indicate error with beep or flash */
142 #define err_method (vi_setops & VI_ERR_METHOD)
144 #if ENABLE_FEATURE_VI_READONLY
145 smallint readonly_mode;
146 #define SET_READONLY_FILE(flags) ((flags) |= 0x01)
147 #define SET_READONLY_MODE(flags) ((flags) |= 0x02)
148 #define UNSET_READONLY_FILE(flags) ((flags) &= 0xfe)
150 #define SET_READONLY_FILE(flags) ((void)0)
151 #define SET_READONLY_MODE(flags) ((void)0)
152 #define UNSET_READONLY_FILE(flags) ((void)0)
155 smallint editing; // >0 while we are editing a file
156 // [code audit says "can be 0, 1 or 2 only"]
157 smallint cmd_mode; // 0=command 1=insert 2=replace
158 int file_modified; // buffer contents changed (counter, not flag!)
159 int last_file_modified; // = -1;
160 int fn_start; // index of first cmd line file name
161 int save_argc; // how many file names on cmd line
162 int cmdcnt; // repetition count
163 unsigned rows, columns; // the terminal screen is this size
164 int crow, ccol; // cursor is on Crow x Ccol
165 int offset; // chars scrolled off the screen to the left
166 int have_status_msg; // is default edit status needed?
167 // [don't make smallint!]
168 int last_status_cksum; // hash of current status line
169 char *current_filename;
170 char *screenbegin; // index into text[], of top line on the screen
171 char *screen; // pointer to the virtual screen buffer
172 int screensize; // and its size
174 char erase_char; // the users erase character
175 char last_input_char; // last char read from user
176 char last_forward_char; // last char searched for with 'f'
178 #if ENABLE_FEATURE_VI_DOT_CMD
179 smallint adding2q; // are we currently adding user input to q
180 int lmc_len; // length of last_modifying_cmd
181 char *ioq, *ioq_start; // pointer to string for get_one_char to "read"
183 #if ENABLE_FEATURE_VI_OPTIMIZE_CURSOR
184 int last_row; // where the cursor was last moved to
186 #if ENABLE_FEATURE_VI_USE_SIGNALS || ENABLE_FEATURE_VI_CRASHME
189 #if ENABLE_FEATURE_VI_SEARCH
190 char *last_search_pattern; // last pattern from a '/' or '?' search
194 #if ENABLE_FEATURE_VI_YANKMARK
195 char *edit_file__cur_line;
197 int refresh__old_offset;
198 int format_edit_status__tot;
200 /* a few references only */
201 #if ENABLE_FEATURE_VI_YANKMARK
202 int YDreg, Ureg; // default delete register and orig line for "U"
203 char *reg[28]; // named register a-z, "D", and "U" 0-25,26,27
204 char *mark[28]; // user marks points somewhere in text[]- a-z and previous context ''
205 char *context_start, *context_end;
207 #if ENABLE_FEATURE_VI_USE_SIGNALS
208 sigjmp_buf restart; // catch_sig()
210 struct termios term_orig, term_vi; // remember what the cooked mode was
211 #if ENABLE_FEATURE_VI_COLON
212 char *initial_cmds[3]; // currently 2 entries, NULL terminated
214 // Should be just enough to hold a key sequence,
215 // but CRASHME mode uses it as generated command buffer too
216 #if ENABLE_FEATURE_VI_CRASHME
217 char readbuffer[128];
221 #define STATUS_BUFFER_LEN 200
222 char status_buffer[STATUS_BUFFER_LEN]; // messages to the user
223 #if ENABLE_FEATURE_VI_DOT_CMD
224 char last_modifying_cmd[MAX_INPUT_LEN]; // last modifying cmd for "."
226 char get_input_line__buf[MAX_INPUT_LEN]; /* former static */
228 char scr_out_buf[MAX_SCR_COLS + MAX_TABSTOP * 2];
230 #define G (*ptr_to_globals)
231 #define text (G.text )
232 #define text_size (G.text_size )
237 #define vi_setops (G.vi_setops )
238 #define editing (G.editing )
239 #define cmd_mode (G.cmd_mode )
240 #define file_modified (G.file_modified )
241 #define last_file_modified (G.last_file_modified )
242 #define fn_start (G.fn_start )
243 #define save_argc (G.save_argc )
244 #define cmdcnt (G.cmdcnt )
245 #define rows (G.rows )
246 #define columns (G.columns )
247 #define crow (G.crow )
248 #define ccol (G.ccol )
249 #define offset (G.offset )
250 #define status_buffer (G.status_buffer )
251 #define have_status_msg (G.have_status_msg )
252 #define last_status_cksum (G.last_status_cksum )
253 #define current_filename (G.current_filename )
254 #define screen (G.screen )
255 #define screensize (G.screensize )
256 #define screenbegin (G.screenbegin )
257 #define tabstop (G.tabstop )
258 #define erase_char (G.erase_char )
259 #define last_input_char (G.last_input_char )
260 #define last_forward_char (G.last_forward_char )
261 #if ENABLE_FEATURE_VI_READONLY
262 #define readonly_mode (G.readonly_mode )
264 #define readonly_mode 0
266 #define adding2q (G.adding2q )
267 #define lmc_len (G.lmc_len )
269 #define ioq_start (G.ioq_start )
270 #define last_row (G.last_row )
271 #define my_pid (G.my_pid )
272 #define last_search_pattern (G.last_search_pattern)
273 #define chars_to_parse (G.chars_to_parse )
275 #define edit_file__cur_line (G.edit_file__cur_line)
276 #define refresh__old_offset (G.refresh__old_offset)
277 #define format_edit_status__tot (G.format_edit_status__tot)
279 #define YDreg (G.YDreg )
280 #define Ureg (G.Ureg )
281 #define mark (G.mark )
282 #define context_start (G.context_start )
283 #define context_end (G.context_end )
284 #define restart (G.restart )
285 #define term_orig (G.term_orig )
286 #define term_vi (G.term_vi )
287 #define initial_cmds (G.initial_cmds )
288 #define readbuffer (G.readbuffer )
289 #define scr_out_buf (G.scr_out_buf )
290 #define last_modifying_cmd (G.last_modifying_cmd )
291 #define get_input_line__buf (G.get_input_line__buf)
293 #define INIT_G() do { \
294 SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \
295 last_file_modified = -1; \
299 static int init_text_buffer(char *); // init from file or create new
300 static void edit_file(char *); // edit one file
301 static void do_cmd(char); // execute a command
302 static int next_tabstop(int);
303 static void sync_cursor(char *, int *, int *); // synchronize the screen cursor to dot
304 static char *begin_line(char *); // return pointer to cur line B-o-l
305 static char *end_line(char *); // return pointer to cur line E-o-l
306 static char *prev_line(char *); // return pointer to prev line B-o-l
307 static char *next_line(char *); // return pointer to next line B-o-l
308 static char *end_screen(void); // get pointer to last char on screen
309 static int count_lines(char *, char *); // count line from start to stop
310 static char *find_line(int); // find begining of line #li
311 static char *move_to_col(char *, int); // move "p" to column l
312 static void dot_left(void); // move dot left- dont leave line
313 static void dot_right(void); // move dot right- dont leave line
314 static void dot_begin(void); // move dot to B-o-l
315 static void dot_end(void); // move dot to E-o-l
316 static void dot_next(void); // move dot to next line B-o-l
317 static void dot_prev(void); // move dot to prev line B-o-l
318 static void dot_scroll(int, int); // move the screen up or down
319 static void dot_skip_over_ws(void); // move dot pat WS
320 static void dot_delete(void); // delete the char at 'dot'
321 static char *bound_dot(char *); // make sure text[0] <= P < "end"
322 static char *new_screen(int, int); // malloc virtual screen memory
323 static char *char_insert(char *, char); // insert the char c at 'p'
324 static char *stupid_insert(char *, char); // stupidly insert the char c at 'p'
325 static int find_range(char **, char **, char); // return pointers for an object
326 static int st_test(char *, int, int, char *); // helper for skip_thing()
327 static char *skip_thing(char *, int, int, int); // skip some object
328 static char *find_pair(char *, char); // find matching pair () [] {}
329 static char *text_hole_delete(char *, char *); // at "p", delete a 'size' byte hole
330 static char *text_hole_make(char *, int); // at "p", make a 'size' byte hole
331 static char *yank_delete(char *, char *, int, int); // yank text[] into register then delete
332 static void show_help(void); // display some help info
333 static void rawmode(void); // set "raw" mode on tty
334 static void cookmode(void); // return to "cooked" mode on tty
335 // sleep for 'h' 1/100 seconds, return 1/0 if stdin is (ready for read)/(not ready)
336 static int mysleep(int);
337 static char readit(void); // read (maybe cursor) key from stdin
338 static char get_one_char(void); // read 1 char from stdin
339 static int file_size(const char *); // what is the byte size of "fn"
340 #if ENABLE_FEATURE_VI_READONLY
341 static int file_insert(const char *, char *, int);
343 static int file_insert(const char *, char *);
345 static int file_write(char *, char *, char *);
346 #if !ENABLE_FEATURE_VI_OPTIMIZE_CURSOR
347 #define place_cursor(a, b, optimize) place_cursor(a, b)
349 static void place_cursor(int, int, int);
350 static void screen_erase(void);
351 static void clear_to_eol(void);
352 static void clear_to_eos(void);
353 static void go_bottom_and_clear_to_eol(void);
354 static void standout_start(void); // send "start reverse video" sequence
355 static void standout_end(void); // send "end reverse video" sequence
356 static void flash(int); // flash the terminal screen
357 static void show_status_line(void); // put a message on the bottom line
358 static void status_line(const char *, ...); // print to status buf
359 static void status_line_bold(const char *, ...);
360 static void not_implemented(const char *); // display "Not implemented" message
361 static int format_edit_status(void); // format file status on status line
362 static void redraw(int); // force a full screen refresh
363 static char* format_line(char* /*, int*/);
364 static void refresh(int); // update the terminal from screen[]
366 static void Indicate_Error(void); // use flash or beep to indicate error
367 #define indicate_error(c) Indicate_Error()
368 static void Hit_Return(void);
370 #if ENABLE_FEATURE_VI_SEARCH
371 static char *char_search(char *, const char *, int, int); // search for pattern starting at p
372 static int mycmp(const char *, const char *, int); // string cmp based in "ignorecase"
374 #if ENABLE_FEATURE_VI_COLON
375 static char *get_one_address(char *, int *); // get colon addr, if present
376 static char *get_address(char *, int *, int *); // get two colon addrs, if present
377 static void colon(char *); // execute the "colon" mode cmds
379 #if ENABLE_FEATURE_VI_USE_SIGNALS
380 static void winch_sig(int); // catch window size changes
381 static void suspend_sig(int); // catch ctrl-Z
382 static void catch_sig(int); // catch ctrl-C and alarm time-outs
384 #if ENABLE_FEATURE_VI_DOT_CMD
385 static void start_new_cmd_q(char); // new queue for command
386 static void end_cmd_q(void); // stop saving input chars
388 #define end_cmd_q() ((void)0)
390 #if ENABLE_FEATURE_VI_SETOPTS
391 static void showmatching(char *); // show the matching pair () [] {}
393 #if ENABLE_FEATURE_VI_YANKMARK || (ENABLE_FEATURE_VI_COLON && ENABLE_FEATURE_VI_SEARCH) || ENABLE_FEATURE_VI_CRASHME
394 static char *string_insert(char *, char *); // insert the string at 'p'
396 #if ENABLE_FEATURE_VI_YANKMARK
397 static char *text_yank(char *, char *, int); // save copy of "p" into a register
398 static char what_reg(void); // what is letter of current YDreg
399 static void check_context(char); // remember context for '' command
401 #if ENABLE_FEATURE_VI_CRASHME
402 static void crash_dummy();
403 static void crash_test();
404 static int crashme = 0;
408 static void write1(const char *out)
413 int vi_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
414 int vi_main(int argc, char **argv)
420 #if ENABLE_FEATURE_VI_USE_SIGNALS || ENABLE_FEATURE_VI_CRASHME
423 #if ENABLE_FEATURE_VI_CRASHME
424 srand((long) my_pid);
426 #ifdef NO_SUCH_APPLET_YET
427 /* If we aren't "vi", we are "view" */
428 if (ENABLE_FEATURE_VI_READONLY && applet_name[2]) {
429 SET_READONLY_MODE(readonly_mode);
433 vi_setops = VI_AUTOINDENT | VI_SHOWMATCH | VI_IGNORECASE;
434 // 1- process $HOME/.exrc file (not inplemented yet)
435 // 2- process EXINIT variable from environment
436 // 3- process command line args
437 #if ENABLE_FEATURE_VI_COLON
439 char *p = getenv("EXINIT");
441 initial_cmds[0] = xstrndup(p, MAX_INPUT_LEN);
444 while ((c = getopt(argc, argv, "hCRH" USE_FEATURE_VI_COLON("c:"))) != -1) {
446 #if ENABLE_FEATURE_VI_CRASHME
451 #if ENABLE_FEATURE_VI_READONLY
452 case 'R': // Read-only flag
453 SET_READONLY_MODE(readonly_mode);
456 #if ENABLE_FEATURE_VI_COLON
457 case 'c': // cmd line vi command
459 initial_cmds[initial_cmds[0] != 0] = xstrndup(optarg, MAX_INPUT_LEN);
471 // The argv array can be used by the ":next" and ":rewind" commands
473 fn_start = optind; // remember first file name for :next and :rew
476 //----- This is the main file handling loop --------------
477 if (optind >= argc) {
480 for (; optind < argc; optind++) {
481 edit_file(argv[optind]);
484 //-----------------------------------------------------------
489 /* read text from file or create an empty buf */
490 /* will also update current_filename */
491 static int init_text_buffer(char *fn)
494 int size = file_size(fn); // file size. -1 means does not exist.
496 /* allocate/reallocate text buffer */
498 text_size = size + 10240;
499 screenbegin = dot = end = text = xzalloc(text_size);
501 if (fn != current_filename) {
502 free(current_filename);
503 current_filename = xstrdup(fn);
506 // file dont exist. Start empty buf with dummy line
507 char_insert(text, '\n');
510 rc = file_insert(fn, text
511 USE_FEATURE_VI_READONLY(, 1));
514 last_file_modified = -1;
515 #if ENABLE_FEATURE_VI_YANKMARK
516 /* init the marks. */
517 memset(mark, 0, sizeof(mark));
522 static void edit_file(char *fn)
524 #if ENABLE_FEATURE_VI_YANKMARK
525 #define cur_line edit_file__cur_line
529 #if ENABLE_FEATURE_VI_USE_SIGNALS
533 editing = 1; // 0 = exit, 1 = one file, 2 = multiple files
538 if (ENABLE_FEATURE_VI_WIN_RESIZE) {
539 get_terminal_width_height(0, &columns, &rows);
540 if (rows > MAX_SCR_ROWS) rows = MAX_SCR_ROWS;
541 if (columns > MAX_SCR_COLS) columns = MAX_SCR_COLS;
543 new_screen(rows, columns); // get memory for virtual screen
544 init_text_buffer(fn);
546 #if ENABLE_FEATURE_VI_YANKMARK
547 YDreg = 26; // default Yank/Delete reg
548 Ureg = 27; // hold orig line for "U" cmd
549 mark[26] = mark[27] = text; // init "previous context"
552 last_forward_char = last_input_char = '\0';
556 #if ENABLE_FEATURE_VI_USE_SIGNALS
558 signal(SIGWINCH, winch_sig);
559 signal(SIGTSTP, suspend_sig);
560 sig = sigsetjmp(restart, 1);
562 screenbegin = dot = text;
566 cmd_mode = 0; // 0=command 1=insert 2='R'eplace
569 offset = 0; // no horizontal offset
571 #if ENABLE_FEATURE_VI_DOT_CMD
573 ioq = ioq_start = NULL;
578 #if ENABLE_FEATURE_VI_COLON
583 while ((p = initial_cmds[n])) {
593 free(initial_cmds[n]);
594 initial_cmds[n] = NULL;
599 redraw(FALSE); // dont force every col re-draw
600 //------This is the main Vi cmd handling loop -----------------------
601 while (editing > 0) {
602 #if ENABLE_FEATURE_VI_CRASHME
604 if ((end - text) > 1) {
605 crash_dummy(); // generate a random command
608 dot = string_insert(text, "\n\n##### Ran out of text to work on. #####\n\n"); // insert the string
613 last_input_char = c = get_one_char(); // get a cmd from user
614 #if ENABLE_FEATURE_VI_YANKMARK
615 // save a copy of the current line- for the 'U" command
616 if (begin_line(dot) != cur_line) {
617 cur_line = begin_line(dot);
618 text_yank(begin_line(dot), end_line(dot), Ureg);
621 #if ENABLE_FEATURE_VI_DOT_CMD
622 // These are commands that change text[].
623 // Remember the input for the "." command
624 if (!adding2q && ioq_start == NULL
625 && cmd_mode == 0 /* command mode */
626 && c != '\0' && strchr(modifying_cmds, c)
631 do_cmd(c); // execute the user command
633 // poll to see if there is input already waiting. if we are
634 // not able to display output fast enough to keep up, skip
635 // the display update until we catch up with input.
636 if (!chars_to_parse && mysleep(0) == 0) {
637 // no input pending - so update output
641 #if ENABLE_FEATURE_VI_CRASHME
643 crash_test(); // test editor variables
646 //-------------------------------------------------------------------
648 go_bottom_and_clear_to_eol();
653 //----- The Colon commands -------------------------------------
654 #if ENABLE_FEATURE_VI_COLON
655 static char *get_one_address(char *p, int *addr) // get colon addr, if present
659 USE_FEATURE_VI_YANKMARK(char c;)
660 USE_FEATURE_VI_SEARCH(char *pat;)
662 *addr = -1; // assume no addr
663 if (*p == '.') { // the current line
666 *addr = count_lines(text, q);
668 #if ENABLE_FEATURE_VI_YANKMARK
669 else if (*p == '\'') { // is this a mark addr
673 if (c >= 'a' && c <= 'z') {
676 q = mark[(unsigned char) c];
677 if (q != NULL) { // is mark valid
678 *addr = count_lines(text, q); // count lines
683 #if ENABLE_FEATURE_VI_SEARCH
684 else if (*p == '/') { // a search pattern
685 q = strchrnul(++p, '/');
686 pat = xstrndup(p, q - p); // save copy of pattern
690 q = char_search(dot, pat, FORWARD, FULL);
692 *addr = count_lines(text, q);
697 else if (*p == '$') { // the last line in file
699 q = begin_line(end - 1);
700 *addr = count_lines(text, q);
701 } else if (isdigit(*p)) { // specific line number
702 sscanf(p, "%d%n", addr, &st);
705 // unrecognised address - assume -1
711 static char *get_address(char *p, int *b, int *e) // get two colon addrs, if present
713 //----- get the address' i.e., 1,3 'a,'b -----
714 // get FIRST addr, if present
716 p++; // skip over leading spaces
717 if (*p == '%') { // alias for 1,$
720 *e = count_lines(text, end-1);
723 p = get_one_address(p, b);
726 if (*p == ',') { // is there a address separator
730 // get SECOND addr, if present
731 p = get_one_address(p, e);
735 p++; // skip over trailing spaces
739 #if ENABLE_FEATURE_VI_SET && ENABLE_FEATURE_VI_SETOPTS
740 static void setops(const char *args, const char *opname, int flg_no,
741 const char *short_opname, int opt)
743 const char *a = args + flg_no;
744 int l = strlen(opname) - 1; /* opname have + ' ' */
746 if (strncasecmp(a, opname, l) == 0
747 || strncasecmp(a, short_opname, 2) == 0
757 // buf must be no longer than MAX_INPUT_LEN!
758 static void colon(char *buf)
760 char c, *orig_buf, *buf1, *q, *r;
761 char *fn, cmd[MAX_INPUT_LEN], args[MAX_INPUT_LEN];
762 int i, l, li, ch, b, e;
763 int useforce, forced = FALSE;
765 // :3154 // if (-e line 3154) goto it else stay put
766 // :4,33w! foo // write a portion of buffer to file "foo"
767 // :w // write all of buffer to current file
769 // :q! // quit- dont care about modified file
770 // :'a,'z!sort -u // filter block through sort
771 // :'f // goto mark "f"
772 // :'fl // list literal the mark "f" line
773 // :.r bar // read file "bar" into buffer before dot
774 // :/123/,/abc/d // delete lines from "123" line to "abc" line
775 // :/xyz/ // goto the "xyz" line
776 // :s/find/replace/ // substitute pattern "find" with "replace"
777 // :!<cmd> // run <cmd> then return
783 buf++; // move past the ':'
787 q = text; // assume 1,$ for the range
789 li = count_lines(text, end - 1);
790 fn = current_filename;
792 // look for optional address(es) :. :1 :1,9 :'q,'a :%
793 buf = get_address(buf, &b, &e);
795 // remember orig command line
798 // get the COMMAND into cmd[]
800 while (*buf != '\0') {
807 while (isblank(*buf))
811 buf1 = last_char_is(cmd, '!');
814 *buf1 = '\0'; // get rid of !
817 // if there is only one addr, then the addr
818 // is the line number of the single line the
819 // user wants. So, reset the end
820 // pointer to point at end of the "b" line
821 q = find_line(b); // what line is #b
826 // we were given two addrs. change the
827 // end pointer to the addr given by user.
828 r = find_line(e); // what line is #e
832 // ------------ now look for the command ------------
834 if (i == 0) { // :123CR goto line #123
836 dot = find_line(b); // what line is #b
840 #if ENABLE_FEATURE_ALLOW_EXEC
841 else if (strncmp(cmd, "!", 1) == 0) { // run a cmd
843 // :!ls run the <cmd>
844 go_bottom_and_clear_to_eol();
846 retcode = system(orig_buf + 1); // run the cmd
848 printf("\nshell returned %i\n\n", retcode);
850 Hit_Return(); // let user see results
853 else if (strncmp(cmd, "=", i) == 0) { // where is the address
854 if (b < 0) { // no addr given- use defaults
855 b = e = count_lines(text, dot);
857 status_line("%d", b);
858 } else if (strncasecmp(cmd, "delete", i) == 0) { // delete lines
859 if (b < 0) { // no addr given- use defaults
860 q = begin_line(dot); // assume .,. for the range
863 dot = yank_delete(q, r, 1, YANKDEL); // save, then delete lines
865 } else if (strncasecmp(cmd, "edit", i) == 0) { // Edit a file
866 // don't edit, if the current file has been modified
867 if (file_modified && !useforce) {
868 status_line_bold("No write since last change (:edit! overrides)");
872 // the user supplied a file name
874 } else if (current_filename && current_filename[0]) {
875 // no user supplied name- use the current filename
876 // fn = current_filename; was set by default
878 // no user file name, no current name- punt
879 status_line_bold("No current filename");
883 if (init_text_buffer(fn) < 0)
886 #if ENABLE_FEATURE_VI_YANKMARK
887 if (Ureg >= 0 && Ureg < 28 && reg[Ureg] != 0) {
888 free(reg[Ureg]); // free orig line reg- for 'U'
891 if (YDreg >= 0 && YDreg < 28 && reg[YDreg] != 0) {
892 free(reg[YDreg]); // free default yank/delete register
896 // how many lines in text[]?
897 li = count_lines(text, end - 1);
898 status_line("\"%s\"%s"
899 USE_FEATURE_VI_READONLY("%s")
900 " %dL, %dC", current_filename,
901 (file_size(fn) < 0 ? " [New file]" : ""),
902 USE_FEATURE_VI_READONLY(
903 ((readonly_mode) ? " [Readonly]" : ""),
906 } else if (strncasecmp(cmd, "file", i) == 0) { // what File is this
907 if (b != -1 || e != -1) {
908 not_implemented("No address allowed on this command");
912 // user wants a new filename
913 free(current_filename);
914 current_filename = xstrdup(args);
916 // user wants file status info
917 last_status_cksum = 0; // force status update
919 } else if (strncasecmp(cmd, "features", i) == 0) { // what features are available
920 // print out values of all features
921 go_bottom_and_clear_to_eol();
926 } else if (strncasecmp(cmd, "list", i) == 0) { // literal print line
927 if (b < 0) { // no addr given- use defaults
928 q = begin_line(dot); // assume .,. for the range
931 go_bottom_and_clear_to_eol();
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 go_bottom_and_clear_to_eol();
1032 printf("----------------------------------------\r\n");
1033 #if ENABLE_FEATURE_VI_SETOPTS
1036 printf("autoindent ");
1042 printf("ignorecase ");
1045 printf("showmatch ");
1046 printf("tabstop=%d ", tabstop);
1051 #if ENABLE_FEATURE_VI_SETOPTS
1054 if (strncasecmp(argp, "no", 2) == 0)
1055 i = 2; // ":set noautoindent"
1056 setops(argp, "autoindent ", i, "ai", VI_AUTOINDENT);
1057 setops(argp, "flash ", i, "fl", VI_ERR_METHOD);
1058 setops(argp, "ignorecase ", i, "ic", VI_IGNORECASE);
1059 setops(argp, "showmatch ", i, "ic", VI_SHOWMATCH);
1061 if (strncasecmp(argp + i, "tabstop=%d ", 7) == 0) {
1062 sscanf(strchr(argp + i, '='), "tabstop=%d" + 7, &ch);
1063 if (ch > 0 && ch <= MAX_TABSTOP)
1066 while (*argp && *argp != ' ')
1067 argp++; // skip to arg delimiter (i.e. blank)
1068 while (*argp && *argp == ' ')
1069 argp++; // skip all delimiting blanks
1071 #endif /* FEATURE_VI_SETOPTS */
1072 #endif /* FEATURE_VI_SET */
1073 #if ENABLE_FEATURE_VI_SEARCH
1074 } else if (strncasecmp(cmd, "s", 1) == 0) { // substitute a pattern with a replacement pattern
1078 // F points to the "find" pattern
1079 // R points to the "replace" pattern
1080 // replace the cmd line delimiters "/" with NULLs
1081 gflag = 0; // global replace flag
1082 c = orig_buf[1]; // what is the delimiter
1083 F = orig_buf + 2; // start of "find"
1084 R = strchr(F, c); // middle delimiter
1085 if (!R) goto colon_s_fail;
1086 *R++ = '\0'; // terminate "find"
1087 buf1 = strchr(R, c);
1088 if (!buf1) goto colon_s_fail;
1089 *buf1++ = '\0'; // terminate "replace"
1090 if (*buf1 == 'g') { // :s/foo/bar/g
1092 gflag++; // turn on gflag
1095 if (b < 0) { // maybe :s/foo/bar/
1096 q = begin_line(dot); // start with cur line
1097 b = count_lines(text, q); // cur line number
1100 e = b; // maybe :.s/foo/bar/
1101 for (i = b; i <= e; i++) { // so, :20,23 s \0 find \0 replace \0
1102 ls = q; // orig line start
1104 buf1 = char_search(q, F, FORWARD, LIMITED); // search cur line only for "find"
1106 // we found the "find" pattern - delete it
1107 text_hole_delete(buf1, buf1 + strlen(F) - 1);
1108 // inset the "replace" patern
1109 string_insert(buf1, R); // insert the string
1110 // check for "global" :s/foo/bar/g
1112 if ((buf1 + strlen(R)) < end_line(ls)) {
1113 q = buf1 + strlen(R);
1114 goto vc4; // don't let q move past cur line
1120 #endif /* FEATURE_VI_SEARCH */
1121 } else if (strncasecmp(cmd, "version", i) == 0) { // show software version
1122 status_line(BB_VER " " BB_BT);
1123 } else if (strncasecmp(cmd, "write", i) == 0 // write text to file
1124 || strncasecmp(cmd, "wq", i) == 0
1125 || strncasecmp(cmd, "wn", i) == 0
1126 || strncasecmp(cmd, "x", i) == 0
1128 // is there a file name to write to?
1132 #if ENABLE_FEATURE_VI_READONLY
1133 if (readonly_mode && !useforce) {
1134 status_line_bold("\"%s\" File is read only", fn);
1138 // how many lines in text[]?
1139 li = count_lines(q, r);
1141 // see if file exists- if not, its just a new file request
1143 // if "fn" is not write-able, chmod u+w
1144 // sprintf(syscmd, "chmod u+w %s", fn);
1148 l = file_write(fn, q, r);
1149 if (useforce && forced) {
1151 // sprintf(syscmd, "chmod u-w %s", fn);
1157 status_line_bold("\"%s\" %s", fn, strerror(errno));
1159 status_line("\"%s\" %dL, %dC", fn, li, l);
1160 if (q == text && r == end - 1 && l == ch) {
1162 last_file_modified = -1;
1164 if ((cmd[0] == 'x' || cmd[1] == 'q' || cmd[1] == 'n' ||
1165 cmd[0] == 'X' || cmd[1] == 'Q' || cmd[1] == 'N')
1170 #if ENABLE_FEATURE_VI_READONLY
1173 #if ENABLE_FEATURE_VI_YANKMARK
1174 } else if (strncasecmp(cmd, "yank", i) == 0) { // yank lines
1175 if (b < 0) { // no addr given- use defaults
1176 q = begin_line(dot); // assume .,. for the range
1179 text_yank(q, r, YDreg);
1180 li = count_lines(q, r);
1181 status_line("Yank %d lines (%d chars) into [%c]",
1182 li, strlen(reg[YDreg]), what_reg());
1186 not_implemented(cmd);
1189 dot = bound_dot(dot); // make sure "dot" is valid
1191 #if ENABLE_FEATURE_VI_SEARCH
1193 status_line(":s expression missing delimiters");
1197 #endif /* FEATURE_VI_COLON */
1199 static void Hit_Return(void)
1204 write1("[Hit return to continue]");
1206 while ((c = get_one_char()) != '\n' && c != '\r')
1208 redraw(TRUE); // force redraw all
1211 static int next_tabstop(int col)
1213 return col + ((tabstop - 1) - (col % tabstop));
1216 //----- Synchronize the cursor to Dot --------------------------
1217 static void sync_cursor(char *d, int *row, int *col)
1219 char *beg_cur; // begin and end of "d" line
1223 beg_cur = begin_line(d); // first char of cur line
1225 if (beg_cur < screenbegin) {
1226 // "d" is before top line on screen
1227 // how many lines do we have to move
1228 cnt = count_lines(beg_cur, screenbegin);
1230 screenbegin = beg_cur;
1231 if (cnt > (rows - 1) / 2) {
1232 // we moved too many lines. put "dot" in middle of screen
1233 for (cnt = 0; cnt < (rows - 1) / 2; cnt++) {
1234 screenbegin = prev_line(screenbegin);
1238 char *end_scr; // begin and end of screen
1239 end_scr = end_screen(); // last char of screen
1240 if (beg_cur > end_scr) {
1241 // "d" is after bottom line on screen
1242 // how many lines do we have to move
1243 cnt = count_lines(end_scr, beg_cur);
1244 if (cnt > (rows - 1) / 2)
1245 goto sc1; // too many lines
1246 for (ro = 0; ro < cnt - 1; ro++) {
1247 // move screen begin the same amount
1248 screenbegin = next_line(screenbegin);
1249 // now, move the end of screen
1250 end_scr = next_line(end_scr);
1251 end_scr = end_line(end_scr);
1255 // "d" is on screen- find out which row
1257 for (ro = 0; ro < rows - 1; ro++) { // drive "ro" to correct row
1263 // find out what col "d" is on
1265 while (tp < d) { // drive "co" to correct column
1266 if (*tp == '\n') //vda || *tp == '\0')
1269 // handle tabs like real vi
1270 if (d == tp && cmd_mode) {
1273 co = next_tabstop(co);
1274 } else if ((unsigned char)*tp < ' ' || *tp == 0x7f) {
1275 co++; // display as ^X, use 2 columns
1281 // "co" is the column where "dot" is.
1282 // The screen has "columns" columns.
1283 // The currently displayed columns are 0+offset -- columns+ofset
1284 // |-------------------------------------------------------------|
1286 // offset | |------- columns ----------------|
1288 // If "co" is already in this range then we do not have to adjust offset
1289 // but, we do have to subtract the "offset" bias from "co".
1290 // If "co" is outside this range then we have to change "offset".
1291 // If the first char of a line is a tab the cursor will try to stay
1292 // in column 7, but we have to set offset to 0.
1294 if (co < 0 + offset) {
1297 if (co >= columns + offset) {
1298 offset = co - columns + 1;
1300 // if the first char of the line is a tab, and "dot" is sitting on it
1301 // force offset to 0.
1302 if (d == beg_cur && *d == '\t') {
1311 //----- Text Movement Routines ---------------------------------
1312 static char *begin_line(char *p) // return pointer to first char cur line
1315 p = memrchr(text, '\n', p - text);
1323 static char *end_line(char *p) // return pointer to NL of cur line
1326 p = memchr(p, '\n', end - p - 1);
1333 static char *dollar_line(char *p) // return pointer to just before NL line
1336 // Try to stay off of the Newline
1337 if (*p == '\n' && (p - begin_line(p)) > 0)
1342 static char *prev_line(char *p) // return pointer first char prev line
1344 p = begin_line(p); // goto begining of cur line
1345 if (p > text && p[-1] == '\n')
1346 p--; // step to prev line
1347 p = begin_line(p); // goto begining of prev line
1351 static char *next_line(char *p) // return pointer first char next line
1354 if (p < end - 1 && *p == '\n')
1355 p++; // step to next line
1359 //----- Text Information Routines ------------------------------
1360 static char *end_screen(void)
1365 // find new bottom line
1367 for (cnt = 0; cnt < rows - 2; cnt++)
1373 // count line from start to stop
1374 static int count_lines(char *start, char *stop)
1379 if (stop < start) { // start and stop are backwards- reverse them
1385 stop = end_line(stop);
1386 while (start <= stop && start <= end - 1) {
1387 start = end_line(start);
1395 static char *find_line(int li) // find begining of line #li
1399 for (q = text; li > 1; li--) {
1405 //----- Dot Movement Routines ----------------------------------
1406 static void dot_left(void)
1408 if (dot > text && dot[-1] != '\n')
1412 static void dot_right(void)
1414 if (dot < end - 1 && *dot != '\n')
1418 static void dot_begin(void)
1420 dot = begin_line(dot); // return pointer to first char cur line
1423 static void dot_end(void)
1425 dot = end_line(dot); // return pointer to last char cur line
1428 static char *move_to_col(char *p, int l)
1434 while (co < l && p < end) {
1435 if (*p == '\n') //vda || *p == '\0')
1438 co = next_tabstop(co);
1439 } else if (*p < ' ' || *p == 127) {
1440 co++; // display as ^X, use 2 columns
1448 static void dot_next(void)
1450 dot = next_line(dot);
1453 static void dot_prev(void)
1455 dot = prev_line(dot);
1458 static void dot_scroll(int cnt, int dir)
1462 for (; cnt > 0; cnt--) {
1465 // ctrl-Y scroll up one line
1466 screenbegin = prev_line(screenbegin);
1469 // ctrl-E scroll down one line
1470 screenbegin = next_line(screenbegin);
1473 // make sure "dot" stays on the screen so we dont scroll off
1474 if (dot < screenbegin)
1476 q = end_screen(); // find new bottom line
1478 dot = begin_line(q); // is dot is below bottom line?
1482 static void dot_skip_over_ws(void)
1485 while (isspace(*dot) && *dot != '\n' && dot < end - 1)
1489 static void dot_delete(void) // delete the char at 'dot'
1491 text_hole_delete(dot, dot);
1494 static char *bound_dot(char *p) // make sure text[0] <= P < "end"
1496 if (p >= end && end > text) {
1498 indicate_error('1');
1502 indicate_error('2');
1507 //----- Helper Utility Routines --------------------------------
1509 //----------------------------------------------------------------
1510 //----- Char Routines --------------------------------------------
1511 /* Chars that are part of a word-
1512 * 0123456789_ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz
1513 * Chars that are Not part of a word (stoppers)
1514 * !"#$%&'()*+,-./:;<=>?@[\]^`{|}~
1515 * Chars that are WhiteSpace
1516 * TAB NEWLINE VT FF RETURN SPACE
1517 * DO NOT COUNT NEWLINE AS WHITESPACE
1520 static char *new_screen(int ro, int co)
1525 screensize = ro * co + 8;
1526 screen = xmalloc(screensize);
1527 // initialize the new screen. assume this will be a empty file.
1529 // non-existent text[] lines start with a tilde (~).
1530 for (li = 1; li < ro - 1; li++) {
1531 screen[(li * co) + 0] = '~';
1536 #if ENABLE_FEATURE_VI_SEARCH
1537 static int mycmp(const char *s1, const char *s2, int len)
1541 i = strncmp(s1, s2, len);
1542 if (ENABLE_FEATURE_VI_SETOPTS && ignorecase) {
1543 i = strncasecmp(s1, s2, len);
1548 // search for pattern starting at p
1549 static char *char_search(char *p, const char *pat, int dir, int range)
1551 #ifndef REGEX_SEARCH
1556 if (dir == FORWARD) {
1557 stop = end - 1; // assume range is p - end-1
1558 if (range == LIMITED)
1559 stop = next_line(p); // range is to next line
1560 for (start = p; start < stop; start++) {
1561 if (mycmp(start, pat, len) == 0) {
1565 } else if (dir == BACK) {
1566 stop = text; // assume range is text - p
1567 if (range == LIMITED)
1568 stop = prev_line(p); // range is to prev line
1569 for (start = p - len; start >= stop; start--) {
1570 if (mycmp(start, pat, len) == 0) {
1575 // pattern not found
1577 #else /* REGEX_SEARCH */
1579 struct re_pattern_buffer preg;
1583 re_syntax_options = RE_SYNTAX_POSIX_EXTENDED;
1589 // assume a LIMITED forward search
1597 // count the number of chars to search over, forward or backward
1601 // RANGE could be negative if we are searching backwards
1604 q = re_compile_pattern(pat, strlen(pat), &preg);
1606 // The pattern was not compiled
1607 status_line_bold("bad search pattern: \"%s\": %s", pat, q);
1608 i = 0; // return p if pattern not compiled
1618 // search for the compiled pattern, preg, in p[]
1619 // range < 0- search backward
1620 // range > 0- search forward
1622 // re_search() < 0 not found or error
1623 // re_search() > 0 index of found pattern
1624 // struct pattern char int int int struct reg
1625 // re_search (*pattern_buffer, *string, size, start, range, *regs)
1626 i = re_search(&preg, q, size, 0, range, 0);
1629 i = 0; // return NULL if pattern not found
1632 if (dir == FORWARD) {
1638 #endif /* REGEX_SEARCH */
1640 #endif /* FEATURE_VI_SEARCH */
1642 static char *char_insert(char *p, char c) // insert the char c at 'p'
1644 if (c == 22) { // Is this an ctrl-V?
1645 p = stupid_insert(p, '^'); // use ^ to indicate literal next
1646 p--; // backup onto ^
1647 refresh(FALSE); // show the ^
1652 } else if (c == 27) { // Is this an ESC?
1655 end_cmd_q(); // stop adding to q
1656 last_status_cksum = 0; // force status update
1657 if ((p[-1] != '\n') && (dot > text)) {
1660 } else if (c == erase_char || c == 8 || c == 127) { // Is this a BS
1662 if ((p[-1] != '\n') && (dot>text)) {
1664 p = text_hole_delete(p, p); // shrink buffer 1 char
1667 // insert a char into text[]
1668 char *sp; // "save p"
1671 c = '\n'; // translate \r to \n
1672 sp = p; // remember addr of insert
1673 p = stupid_insert(p, c); // insert the char
1674 #if ENABLE_FEATURE_VI_SETOPTS
1675 if (showmatch && strchr(")]}", *sp) != NULL) {
1678 if (autoindent && c == '\n') { // auto indent the new line
1681 q = prev_line(p); // use prev line as templet
1682 for (; isblank(*q); q++) {
1683 p = stupid_insert(p, *q); // insert the char
1691 static char *stupid_insert(char *p, char c) // stupidly insert the char c at 'p'
1693 p = text_hole_make(p, 1);
1695 //file_modified++; - done by text_hole_make()
1699 static int find_range(char **start, char **stop, char c)
1701 char *save_dot, *p, *q, *t;
1702 int cnt, multiline = 0;
1707 if (strchr("cdy><", c)) {
1708 // these cmds operate on whole lines
1709 p = q = begin_line(p);
1710 for (cnt = 1; cnt < cmdcnt; cnt++) {
1714 } else if (strchr("^%$0bBeEfth\b\177", c)) {
1715 // These cmds operate on char positions
1716 do_cmd(c); // execute movement cmd
1718 } else if (strchr("wW", c)) {
1719 do_cmd(c); // execute movement cmd
1720 // if we are at the next word's first char
1721 // step back one char
1722 // but check the possibilities when it is true
1723 if (dot > text && ((isspace(dot[-1]) && !isspace(dot[0]))
1724 || (ispunct(dot[-1]) && !ispunct(dot[0]))
1725 || (isalnum(dot[-1]) && !isalnum(dot[0]))))
1726 dot--; // move back off of next word
1727 if (dot > text && *dot == '\n')
1728 dot--; // stay off NL
1730 } else if (strchr("H-k{", c)) {
1731 // these operate on multi-lines backwards
1732 q = end_line(dot); // find NL
1733 do_cmd(c); // execute movement cmd
1736 } else if (strchr("L+j}\r\n", c)) {
1737 // these operate on multi-lines forwards
1738 p = begin_line(dot);
1739 do_cmd(c); // execute movement cmd
1740 dot_end(); // find NL
1743 // nothing -- this causes any other values of c to
1744 // represent the one-character range under the
1745 // cursor. this is correct for ' ' and 'l', but
1746 // perhaps no others.
1755 // backward char movements don't include start position
1756 if (q > p && strchr("^0bBh\b\177", c)) q--;
1759 for (t = p; t <= q; t++) {
1772 static int st_test(char *p, int type, int dir, char *tested)
1782 if (type == S_BEFORE_WS) {
1784 test = ((!isspace(c)) || c == '\n');
1786 if (type == S_TO_WS) {
1788 test = ((!isspace(c)) || c == '\n');
1790 if (type == S_OVER_WS) {
1792 test = ((isspace(c)));
1794 if (type == S_END_PUNCT) {
1796 test = ((ispunct(c)));
1798 if (type == S_END_ALNUM) {
1800 test = ((isalnum(c)) || c == '_');
1806 static char *skip_thing(char *p, int linecnt, int dir, int type)
1810 while (st_test(p, type, dir, &c)) {
1811 // make sure we limit search to correct number of lines
1812 if (c == '\n' && --linecnt < 1)
1814 if (dir >= 0 && p >= end - 1)
1816 if (dir < 0 && p <= text)
1818 p += dir; // move to next char
1823 // find matching char of pair () [] {}
1824 static char *find_pair(char *p, const char c)
1831 dir = 1; // assume forward
1833 case '(': match = ')'; break;
1834 case '[': match = ']'; break;
1835 case '{': match = '}'; break;
1836 case ')': match = '('; dir = -1; break;
1837 case ']': match = '['; dir = -1; break;
1838 case '}': match = '{'; dir = -1; break;
1840 for (q = p + dir; text <= q && q < end; q += dir) {
1841 // look for match, count levels of pairs (( ))
1843 level++; // increase pair levels
1845 level--; // reduce pair level
1847 break; // found matching pair
1850 q = NULL; // indicate no match
1854 #if ENABLE_FEATURE_VI_SETOPTS
1855 // show the matching char of a pair, () [] {}
1856 static void showmatching(char *p)
1860 // we found half of a pair
1861 q = find_pair(p, *p); // get loc of matching char
1863 indicate_error('3'); // no matching char
1865 // "q" now points to matching pair
1866 save_dot = dot; // remember where we are
1867 dot = q; // go to new loc
1868 refresh(FALSE); // let the user see it
1869 mysleep(40); // give user some time
1870 dot = save_dot; // go back to old loc
1874 #endif /* FEATURE_VI_SETOPTS */
1876 // open a hole in text[]
1877 static char *text_hole_make(char *p, int size) // at "p", make a 'size' byte hole
1881 end += size; // adjust the new END
1882 if (end >= (text + text_size)) {
1884 text_size += end - (text + text_size) + 10240;
1885 new_text = xrealloc(text, text_size);
1886 screenbegin = new_text + (screenbegin - text);
1887 dot = new_text + (dot - text);
1888 end = new_text + (end - text);
1889 p = new_text + (p - text);
1892 memmove(p + size, p, end - size - p);
1893 memset(p, ' ', size); // clear new hole
1898 // close a hole in text[]
1899 static char *text_hole_delete(char *p, char *q) // delete "p" through "q", inclusive
1904 // move forwards, from beginning
1908 if (q < p) { // they are backward- swap them
1912 hole_size = q - p + 1;
1914 if (src < text || src > end)
1916 if (dest < text || dest >= end)
1919 goto thd_atend; // just delete the end of the buffer
1920 memmove(dest, src, cnt);
1922 end = end - hole_size; // adjust the new END
1924 dest = end - 1; // make sure dest in below end-1
1926 dest = end = text; // keep pointers valid
1932 // copy text into register, then delete text.
1933 // if dist <= 0, do not include, or go past, a NewLine
1935 static char *yank_delete(char *start, char *stop, int dist, int yf)
1939 // make sure start <= stop
1941 // they are backwards, reverse them
1947 // we cannot cross NL boundaries
1951 // dont go past a NewLine
1952 for (; p + 1 <= stop; p++) {
1954 stop = p; // "stop" just before NewLine
1960 #if ENABLE_FEATURE_VI_YANKMARK
1961 text_yank(start, stop, YDreg);
1963 if (yf == YANKDEL) {
1964 p = text_hole_delete(start, stop);
1969 static void show_help(void)
1971 puts("These features are available:"
1972 #if ENABLE_FEATURE_VI_SEARCH
1973 "\n\tPattern searches with / and ?"
1975 #if ENABLE_FEATURE_VI_DOT_CMD
1976 "\n\tLast command repeat with \'.\'"
1978 #if ENABLE_FEATURE_VI_YANKMARK
1979 "\n\tLine marking with 'x"
1980 "\n\tNamed buffers with \"x"
1982 #if ENABLE_FEATURE_VI_READONLY
1983 "\n\tReadonly if vi is called as \"view\""
1984 "\n\tReadonly with -R command line arg"
1986 #if ENABLE_FEATURE_VI_SET
1987 "\n\tSome colon mode commands with \':\'"
1989 #if ENABLE_FEATURE_VI_SETOPTS
1990 "\n\tSettable options with \":set\""
1992 #if ENABLE_FEATURE_VI_USE_SIGNALS
1993 "\n\tSignal catching- ^C"
1994 "\n\tJob suspend and resume with ^Z"
1996 #if ENABLE_FEATURE_VI_WIN_RESIZE
1997 "\n\tAdapt to window re-sizes"
2002 #if ENABLE_FEATURE_VI_DOT_CMD
2003 static void start_new_cmd_q(char c)
2005 // get buffer for new cmd
2006 // if there is a current cmd count put it in the buffer first
2008 lmc_len = sprintf(last_modifying_cmd, "%d%c", cmdcnt, c);
2009 } else { // just save char c onto queue
2010 last_modifying_cmd[0] = c;
2016 static void end_cmd_q(void)
2018 #if ENABLE_FEATURE_VI_YANKMARK
2019 YDreg = 26; // go back to default Yank/Delete reg
2023 #endif /* FEATURE_VI_DOT_CMD */
2025 #if ENABLE_FEATURE_VI_YANKMARK \
2026 || (ENABLE_FEATURE_VI_COLON && ENABLE_FEATURE_VI_SEARCH) \
2027 || ENABLE_FEATURE_VI_CRASHME
2028 static char *string_insert(char *p, char *s) // insert the string at 'p'
2033 text_hole_make(p, i);
2035 for (cnt = 0; *s != '\0'; s++) {
2039 #if ENABLE_FEATURE_VI_YANKMARK
2040 status_line("Put %d lines (%d chars) from [%c]", cnt, i, what_reg());
2046 #if ENABLE_FEATURE_VI_YANKMARK
2047 static char *text_yank(char *p, char *q, int dest) // copy text into a register
2052 if (q < p) { // they are backwards- reverse them
2059 free(t); // if already a yank register, free it
2060 t = xmalloc(cnt + 1); // get a new register
2061 memset(t, '\0', cnt + 1); // clear new text[]
2062 strncpy(t, p, cnt); // copy text[] into bufer
2067 static char what_reg(void)
2071 c = 'D'; // default to D-reg
2072 if (0 <= YDreg && YDreg <= 25)
2073 c = 'a' + (char) YDreg;
2081 static void check_context(char cmd)
2083 // A context is defined to be "modifying text"
2084 // Any modifying command establishes a new context.
2086 if (dot < context_start || dot > context_end) {
2087 if (strchr(modifying_cmds, cmd) != NULL) {
2088 // we are trying to modify text[]- make this the current context
2089 mark[27] = mark[26]; // move cur to prev
2090 mark[26] = dot; // move local to cur
2091 context_start = prev_line(prev_line(dot));
2092 context_end = next_line(next_line(dot));
2093 //loiter= start_loiter= now;
2098 static char *swap_context(char *p) // goto new context for '' command make this the current context
2102 // the current context is in mark[26]
2103 // the previous context is in mark[27]
2104 // only swap context if other context is valid
2105 if (text <= mark[27] && mark[27] <= end - 1) {
2107 mark[27] = mark[26];
2109 p = mark[26]; // where we are going- previous context
2110 context_start = prev_line(prev_line(prev_line(p)));
2111 context_end = next_line(next_line(next_line(p)));
2115 #endif /* FEATURE_VI_YANKMARK */
2117 //----- Set terminal attributes --------------------------------
2118 static void rawmode(void)
2120 tcgetattr(0, &term_orig);
2121 term_vi = term_orig;
2122 term_vi.c_lflag &= (~ICANON & ~ECHO); // leave ISIG ON- allow intr's
2123 term_vi.c_iflag &= (~IXON & ~ICRNL);
2124 term_vi.c_oflag &= (~ONLCR);
2125 term_vi.c_cc[VMIN] = 1;
2126 term_vi.c_cc[VTIME] = 0;
2127 erase_char = term_vi.c_cc[VERASE];
2128 tcsetattr(0, TCSANOW, &term_vi);
2131 static void cookmode(void)
2134 tcsetattr(0, TCSANOW, &term_orig);
2137 //----- Come here when we get a window resize signal ---------
2138 #if ENABLE_FEATURE_VI_USE_SIGNALS
2139 static void winch_sig(int sig UNUSED_PARAM)
2141 // FIXME: do it in main loop!!!
2142 signal(SIGWINCH, winch_sig);
2143 if (ENABLE_FEATURE_VI_WIN_RESIZE) {
2144 get_terminal_width_height(0, &columns, &rows);
2145 if (rows > MAX_SCR_ROWS) rows = MAX_SCR_ROWS;
2146 if (columns > MAX_SCR_COLS) columns = MAX_SCR_COLS;
2148 new_screen(rows, columns); // get memory for virtual screen
2149 redraw(TRUE); // re-draw the screen
2152 //----- Come here when we get a continue signal -------------------
2153 static void cont_sig(int sig UNUSED_PARAM)
2155 rawmode(); // terminal to "raw"
2156 last_status_cksum = 0; // force status update
2157 redraw(TRUE); // re-draw the screen
2159 signal(SIGTSTP, suspend_sig);
2160 signal(SIGCONT, SIG_DFL);
2161 kill(my_pid, SIGCONT); // huh? why? we are already "continued"...
2164 //----- Come here when we get a Suspend signal -------------------
2165 static void suspend_sig(int sig UNUSED_PARAM)
2167 go_bottom_and_clear_to_eol();
2168 cookmode(); // terminal to "cooked"
2170 signal(SIGCONT, cont_sig);
2171 signal(SIGTSTP, SIG_DFL);
2172 kill(my_pid, SIGTSTP);
2175 //----- Come here when we get a signal ---------------------------
2176 static void catch_sig(int sig)
2178 signal(SIGINT, catch_sig);
2180 siglongjmp(restart, sig);
2182 #endif /* FEATURE_VI_USE_SIGNALS */
2184 static int mysleep(int hund) // sleep for 'h' 1/100 seconds
2186 struct pollfd pfd[1];
2189 pfd[0].events = POLLIN;
2190 return safe_poll(pfd, 1, hund*10) > 0;
2193 //----- IO Routines --------------------------------------------
2194 static char readit(void) // read (maybe cursor) key from stdin
2199 // Known escape sequences for cursor and function keys.
2200 static const struct esc_cmds {
2202 char val; //TODO: int? Need to make it at least 8-bit clean!
2204 {"OA" , VI_K_UP }, // Cursor Key Up
2205 {"OB" , VI_K_DOWN }, // Cursor Key Down
2206 {"OC" , VI_K_RIGHT }, // Cursor Key Right
2207 {"OD" , VI_K_LEFT }, // Cursor Key Left
2208 {"OH" , VI_K_HOME }, // Cursor Key Home
2209 {"OF" , VI_K_END }, // Cursor Key End
2210 {"OP" , VI_K_FUN1 }, // Function Key F1
2211 {"OQ" , VI_K_FUN2 }, // Function Key F2
2212 {"OR" , VI_K_FUN3 }, // Function Key F3
2213 {"OS" , VI_K_FUN4 }, // Function Key F4
2215 {"[A" , VI_K_UP }, // Cursor Key Up
2216 {"[B" , VI_K_DOWN }, // Cursor Key Down
2217 {"[C" , VI_K_RIGHT }, // Cursor Key Right
2218 {"[D" , VI_K_LEFT }, // Cursor Key Left
2219 {"[H" , VI_K_HOME }, // Cursor Key Home
2220 {"[F" , VI_K_END }, // Cursor Key End
2221 {"[1~" , VI_K_HOME }, // Cursor Key Home
2222 {"[2~" , VI_K_INSERT }, // Cursor Key Insert
2223 {"[3~" , VI_K_DELETE }, // Cursor Key Delete
2224 {"[4~" , VI_K_END }, // Cursor Key End
2225 {"[5~" , VI_K_PAGEUP }, // Cursor Key Page Up
2226 {"[6~" , VI_K_PAGEDOWN}, // Cursor Key Page Down
2227 // careful: these have no terminating NUL!
2228 {"[11~", VI_K_FUN1 }, // Function Key F1
2229 {"[12~", VI_K_FUN2 }, // Function Key F2
2230 {"[13~", VI_K_FUN3 }, // Function Key F3
2231 {"[14~", VI_K_FUN4 }, // Function Key F4
2232 {"[15~", VI_K_FUN5 }, // Function Key F5
2233 {"[17~", VI_K_FUN6 }, // Function Key F6
2234 {"[18~", VI_K_FUN7 }, // Function Key F7
2235 {"[19~", VI_K_FUN8 }, // Function Key F8
2236 {"[20~", VI_K_FUN9 }, // Function Key F9
2237 {"[21~", VI_K_FUN10 }, // Function Key F10
2238 {"[23~", VI_K_FUN11 }, // Function Key F11
2239 {"[24~", VI_K_FUN12 }, // Function Key F12
2246 // If no data, block waiting for input.
2247 // Can't read more than minimal ESC sequence size -
2248 // see "n = 0" below. Example of mishandled
2249 // sequence if we read 4 chars here: "ESC O A ESC O A".
2250 // We'll read "ESC O A ESC" and lose second ESC!
2251 n = safe_read(0, readbuffer, 3);
2254 go_bottom_and_clear_to_eol();
2255 cookmode(); // terminal to "cooked"
2256 bb_error_msg_and_die("can't read user input");
2260 // Grab character to return from buffer
2262 // Returning NUL from this routine would be bad.
2266 if (n) memmove(readbuffer, readbuffer + 1, n);
2268 // If it's an escape sequence, loop through known matches.
2270 const struct esc_cmds *eindex;
2273 pfd.fd = STDIN_FILENO;
2274 pfd.events = POLLIN;
2275 for (eindex = esccmds; eindex < esccmds + ARRAY_SIZE(esccmds); eindex++) {
2276 // n - position in sequence we did not read yet
2277 int i = 0; // position in sequence to compare
2279 // Loop through chars in this sequence
2281 // So far escape sequence matches up to [i-1]
2283 // Need more chars, read another one if it wouldn't block.
2284 // (Note that escape sequences come in as a unit,
2285 // so if we would block it's not really an escape sequence.)
2287 // Timeout is needed to reconnect escape sequences
2288 // split up by transmission over a serial console.
2289 // Even though inter-char delay on 1200 baud is <10ms,
2290 // process scheduling can enlarge it arbitrarily,
2291 // on both send and receive sides.
2292 // Erring on the safe side - 5 timer ticks on 100 HZ.
2293 if (safe_poll(&pfd, 1, 50)) {
2294 if (safe_read(0, readbuffer + n, 1) <= 0)
2299 // Array is sorted from shortest to longest,
2300 // we can't match anything later in array,
2301 // break out of both loops.
2305 if (readbuffer[i] != eindex->seq[i])
2306 break; // try next seq
2308 if (i == 4 || !eindex->seq[i]) { // entire seq matched
2311 // n -= i; memmove(...);
2312 // would be more correct,
2313 // but we never read ahead that much,
2319 // We did not find matching sequence, it was a bare ESC.
2320 // We possibly read and stored more input in readbuffer by now.
2328 //----- IO Routines --------------------------------------------
2329 static char get_one_char(void)
2333 #if ENABLE_FEATURE_VI_DOT_CMD
2335 // we are not adding to the q.
2336 // but, we may be reading from a q
2338 // there is no current q, read from STDIN
2339 c = readit(); // get the users input
2341 // there is a queue to get chars from first
2344 // the end of the q, read from STDIN
2346 ioq_start = ioq = 0;
2347 c = readit(); // get the users input
2351 // adding STDIN chars to q
2352 c = readit(); // get the users input
2353 if (lmc_len >= MAX_INPUT_LEN - 1) {
2354 status_line_bold("last_modifying_cmd overrun");
2356 // add new char to q
2357 last_modifying_cmd[lmc_len++] = c;
2361 c = readit(); // get the users input
2362 #endif /* FEATURE_VI_DOT_CMD */
2366 // Get input line (uses "status line" area)
2367 static char *get_input_line(const char *prompt)
2369 // char [MAX_INPUT_LEN]
2370 #define buf get_input_line__buf
2375 strcpy(buf, prompt);
2376 last_status_cksum = 0; // force status update
2377 go_bottom_and_clear_to_eol();
2378 write1(prompt); // write out the :, /, or ? prompt
2381 while (i < MAX_INPUT_LEN) {
2383 if (c == '\n' || c == '\r' || c == 27)
2384 break; // this is end of input
2385 if (c == erase_char || c == 8 || c == 127) {
2386 // user wants to erase prev char
2388 write1("\b \b"); // erase char on screen
2389 if (i <= 0) // user backs up before b-o-l, exit
2402 static int file_size(const char *fn) // what is the byte size of "fn"
2408 if (fn && fn[0] && stat(fn, &st_buf) == 0) // see if file exists
2409 cnt = (int) st_buf.st_size;
2413 static int file_insert(const char *fn, char *p
2414 USE_FEATURE_VI_READONLY(, int update_ro_status))
2418 struct stat statbuf;
2421 if (stat(fn, &statbuf) < 0) {
2422 status_line_bold("\"%s\" %s", fn, strerror(errno));
2425 if (!S_ISREG(statbuf.st_mode)) {
2426 // This is not a regular file
2427 status_line_bold("\"%s\" Not a regular file", fn);
2430 if (p < text || p > end) {
2431 status_line_bold("Trying to insert file outside of memory");
2435 // read file to buffer
2436 fd = open(fn, O_RDONLY);
2438 status_line_bold("\"%s\" %s", fn, strerror(errno));
2441 size = statbuf.st_size;
2442 p = text_hole_make(p, size);
2443 cnt = safe_read(fd, p, size);
2445 status_line_bold("\"%s\" %s", fn, strerror(errno));
2446 p = text_hole_delete(p, p + size - 1); // un-do buffer insert
2447 } else if (cnt < size) {
2448 // There was a partial read, shrink unused space text[]
2449 p = text_hole_delete(p + cnt, p + (size - cnt) - 1); // un-do buffer insert
2450 status_line_bold("cannot read all of file \"%s\"", fn);
2456 #if ENABLE_FEATURE_VI_READONLY
2457 if (update_ro_status
2458 && ((access(fn, W_OK) < 0) ||
2459 /* root will always have access()
2460 * so we check fileperms too */
2461 !(statbuf.st_mode & (S_IWUSR | S_IWGRP | S_IWOTH))
2464 SET_READONLY_FILE(readonly_mode);
2470 static int file_write(char *fn, char *first, char *last)
2472 int fd, cnt, charcnt;
2475 status_line_bold("No current filename");
2479 /* By popular request we do not open file with O_TRUNC,
2480 * but instead ftruncate() it _after_ successful write.
2481 * Might reduce amount of data lost on power fail etc.
2483 fd = open(fn, (O_WRONLY | O_CREAT), 0666);
2486 cnt = last - first + 1;
2487 charcnt = full_write(fd, first, cnt);
2488 ftruncate(fd, charcnt);
2489 if (charcnt == cnt) {
2491 //file_modified = FALSE;
2499 //----- Terminal Drawing ---------------------------------------
2500 // The terminal is made up of 'rows' line of 'columns' columns.
2501 // classically this would be 24 x 80.
2502 // screen coordinates
2508 // 23,0 ... 23,79 <- status line
2510 //----- Move the cursor to row x col (count from 0, not 1) -------
2511 static void place_cursor(int row, int col, int optimize)
2513 char cm1[sizeof(CMrc) + sizeof(int)*3 * 2];
2514 #if ENABLE_FEATURE_VI_OPTIMIZE_CURSOR
2516 SZ_UP = sizeof(CMup),
2517 SZ_DN = sizeof(CMdown),
2518 SEQ_SIZE = SZ_UP > SZ_DN ? SZ_UP : SZ_DN,
2520 char cm2[SEQ_SIZE * 5 + 32]; // bigger than worst case size
2524 if (row < 0) row = 0;
2525 if (row >= rows) row = rows - 1;
2526 if (col < 0) col = 0;
2527 if (col >= columns) col = columns - 1;
2529 //----- 1. Try the standard terminal ESC sequence
2530 sprintf(cm1, CMrc, row + 1, col + 1);
2533 #if ENABLE_FEATURE_VI_OPTIMIZE_CURSOR
2534 if (optimize && col < 16) {
2536 int Rrow = last_row;
2537 int diff = Rrow - row;
2539 if (diff < -5 || diff > 5)
2542 //----- find the minimum # of chars to move cursor -------------
2543 //----- 2. Try moving with discreet chars (Newline, [back]space, ...)
2546 // move to the correct row
2547 while (row < Rrow) {
2548 // the cursor has to move up
2552 while (row > Rrow) {
2553 // the cursor has to move down
2554 strcat(cm2, CMdown);
2558 // now move to the correct column
2559 strcat(cm2, "\r"); // start at col 0
2560 // just send out orignal source char to get to correct place
2561 screenp = &screen[row * columns]; // start of screen line
2562 strncat(cm2, screenp, col);
2564 // pick the shortest cursor motion to send out
2565 if (strlen(cm2) < strlen(cm)) {
2571 #endif /* FEATURE_VI_OPTIMIZE_CURSOR */
2575 //----- Erase from cursor to end of line -----------------------
2576 static void clear_to_eol(void)
2578 write1(Ceol); // Erase from cursor to end of line
2581 static void go_bottom_and_clear_to_eol(void)
2583 place_cursor(rows - 1, 0, FALSE); // go to bottom of screen
2584 clear_to_eol(); // erase to end of line
2587 //----- Erase from cursor to end of screen -----------------------
2588 static void clear_to_eos(void)
2590 write1(Ceos); // Erase from cursor to end of screen
2593 //----- Start standout mode ------------------------------------
2594 static void standout_start(void) // send "start reverse video" sequence
2596 write1(SOs); // Start reverse video mode
2599 //----- End standout mode --------------------------------------
2600 static void standout_end(void) // send "end reverse video" sequence
2602 write1(SOn); // End reverse video mode
2605 //----- Flash the screen --------------------------------------
2606 static void flash(int h)
2608 standout_start(); // send "start reverse video" sequence
2611 standout_end(); // send "end reverse video" sequence
2615 static void Indicate_Error(void)
2617 #if ENABLE_FEATURE_VI_CRASHME
2619 return; // generate a random command
2622 write1(bell); // send out a bell character
2628 //----- Screen[] Routines --------------------------------------
2629 //----- Erase the Screen[] memory ------------------------------
2630 static void screen_erase(void)
2632 memset(screen, ' ', screensize); // clear new screen
2635 static int bufsum(char *buf, int count)
2638 char *e = buf + count;
2641 sum += (unsigned char) *buf++;
2645 //----- Draw the status line at bottom of the screen -------------
2646 static void show_status_line(void)
2648 int cnt = 0, cksum = 0;
2650 // either we already have an error or status message, or we
2652 if (!have_status_msg) {
2653 cnt = format_edit_status();
2654 cksum = bufsum(status_buffer, cnt);
2656 if (have_status_msg || ((cnt > 0 && last_status_cksum != cksum))) {
2657 last_status_cksum = cksum; // remember if we have seen this line
2658 go_bottom_and_clear_to_eol();
2659 write1(status_buffer);
2660 if (have_status_msg) {
2661 if (((int)strlen(status_buffer) - (have_status_msg - 1)) >
2663 have_status_msg = 0;
2666 have_status_msg = 0;
2668 place_cursor(crow, ccol, FALSE); // put cursor back in correct place
2673 //----- format the status buffer, the bottom line of screen ------
2674 // format status buffer, with STANDOUT mode
2675 static void status_line_bold(const char *format, ...)
2679 va_start(args, format);
2680 strcpy(status_buffer, SOs); // Terminal standout mode on
2681 vsprintf(status_buffer + sizeof(SOs)-1, format, args);
2682 strcat(status_buffer, SOn); // Terminal standout mode off
2685 have_status_msg = 1 + sizeof(SOs) + sizeof(SOn) - 2;
2688 // format status buffer
2689 static void status_line(const char *format, ...)
2693 va_start(args, format);
2694 vsprintf(status_buffer, format, args);
2697 have_status_msg = 1;
2700 // copy s to buf, convert unprintable
2701 static void print_literal(char *buf, const char *s)
2714 c_is_no_print = (c & 0x80) && !Isprint(c);
2715 if (c_is_no_print) {
2719 if (c < ' ' || c == 127) {
2732 if (strlen(buf) > MAX_INPUT_LEN - 10) // paranoia
2737 static void not_implemented(const char *s)
2739 char buf[MAX_INPUT_LEN];
2741 print_literal(buf, s);
2742 status_line_bold("\'%s\' is not implemented", buf);
2745 // show file status on status line
2746 static int format_edit_status(void)
2748 static const char cmd_mode_indicator[] ALIGN1 = "-IR-";
2750 #define tot format_edit_status__tot
2752 int cur, percent, ret, trunc_at;
2754 // file_modified is now a counter rather than a flag. this
2755 // helps reduce the amount of line counting we need to do.
2756 // (this will cause a mis-reporting of modified status
2757 // once every MAXINT editing operations.)
2759 // it would be nice to do a similar optimization here -- if
2760 // we haven't done a motion that could have changed which line
2761 // we're on, then we shouldn't have to do this count_lines()
2762 cur = count_lines(text, dot);
2764 // reduce counting -- the total lines can't have
2765 // changed if we haven't done any edits.
2766 if (file_modified != last_file_modified) {
2767 tot = cur + count_lines(dot, end - 1) - 1;
2768 last_file_modified = file_modified;
2771 // current line percent
2772 // ------------- ~~ ----------
2775 percent = (100 * cur) / tot;
2781 trunc_at = columns < STATUS_BUFFER_LEN-1 ?
2782 columns : STATUS_BUFFER_LEN-1;
2784 ret = snprintf(status_buffer, trunc_at+1,
2785 #if ENABLE_FEATURE_VI_READONLY
2786 "%c %s%s%s %d/%d %d%%",
2788 "%c %s%s %d/%d %d%%",
2790 cmd_mode_indicator[cmd_mode & 3],
2791 (current_filename != NULL ? current_filename : "No file"),
2792 #if ENABLE_FEATURE_VI_READONLY
2793 (readonly_mode ? " [Readonly]" : ""),
2795 (file_modified ? " [Modified]" : ""),
2798 if (ret >= 0 && ret < trunc_at)
2799 return ret; /* it all fit */
2801 return trunc_at; /* had to truncate */
2805 //----- Force refresh of all Lines -----------------------------
2806 static void redraw(int full_screen)
2808 place_cursor(0, 0, FALSE); // put cursor in correct place
2809 clear_to_eos(); // tell terminal to erase display
2810 screen_erase(); // erase the internal screen buffer
2811 last_status_cksum = 0; // force status update
2812 refresh(full_screen); // this will redraw the entire display
2816 //----- Format a text[] line into a buffer ---------------------
2817 static char* format_line(char *src /*, int li*/)
2822 char *dest = scr_out_buf; // [MAX_SCR_COLS + MAX_TABSTOP * 2]
2824 c = '~'; // char in col 0 in non-existent lines is '~'
2826 while (co < columns + tabstop) {
2827 // have we gone past the end?
2832 if ((c & 0x80) && !Isprint(c)) {
2835 if (c < ' ' || c == 0x7f) {
2839 while ((co % tabstop) != (tabstop - 1)) {
2847 c += '@'; // Ctrl-X -> 'X'
2852 // discard scrolled-off-to-the-left portion,
2853 // in tabstop-sized pieces
2854 if (ofs >= tabstop && co >= tabstop) {
2855 memmove(dest, dest + tabstop, co);
2862 // check "short line, gigantic offset" case
2865 // discard last scrolled off part
2868 // fill the rest with spaces
2870 memset(&dest[co], ' ', columns - co);
2874 //----- Refresh the changed screen lines -----------------------
2875 // Copy the source line from text[] into the buffer and note
2876 // if the current screenline is different from the new buffer.
2877 // If they differ then that line needs redrawing on the terminal.
2879 static void refresh(int full_screen)
2881 #define old_offset refresh__old_offset
2884 char *tp, *sp; // pointer into text[] and screen[]
2886 if (ENABLE_FEATURE_VI_WIN_RESIZE) {
2887 unsigned c = columns, r = rows;
2888 get_terminal_width_height(0, &columns, &rows);
2889 if (rows > MAX_SCR_ROWS) rows = MAX_SCR_ROWS;
2890 if (columns > MAX_SCR_COLS) columns = MAX_SCR_COLS;
2891 full_screen |= (c - columns) | (r - rows);
2893 sync_cursor(dot, &crow, &ccol); // where cursor will be (on "dot")
2894 tp = screenbegin; // index into text[] of top line
2896 // compare text[] to screen[] and mark screen[] lines that need updating
2897 for (li = 0; li < rows - 1; li++) {
2898 int cs, ce; // column start & end
2900 // format current text line
2901 out_buf = format_line(tp /*, li*/);
2903 // skip to the end of the current text[] line
2905 char *t = memchr(tp, '\n', end - tp);
2906 if (!t) t = end - 1;
2910 // see if there are any changes between vitual screen and out_buf
2911 changed = FALSE; // assume no change
2914 sp = &screen[li * columns]; // start of screen line
2916 // force re-draw of every single column from 0 - columns-1
2919 // compare newly formatted buffer with virtual screen
2920 // look forward for first difference between buf and screen
2921 for (; cs <= ce; cs++) {
2922 if (out_buf[cs] != sp[cs]) {
2923 changed = TRUE; // mark for redraw
2928 // look backward for last difference between out_buf and screen
2929 for (; ce >= cs; ce--) {
2930 if (out_buf[ce] != sp[ce]) {
2931 changed = TRUE; // mark for redraw
2935 // now, cs is index of first diff, and ce is index of last diff
2937 // if horz offset has changed, force a redraw
2938 if (offset != old_offset) {
2943 // make a sanity check of columns indexes
2945 if (ce > columns - 1) ce = columns - 1;
2946 if (cs > ce) { cs = 0; ce = columns - 1; }
2947 // is there a change between vitual screen and out_buf
2949 // copy changed part of buffer to virtual screen
2950 memcpy(sp+cs, out_buf+cs, ce-cs+1);
2952 // move cursor to column of first change
2953 //if (offset != old_offset) {
2954 // // place_cursor is still too stupid
2955 // // to handle offsets correctly
2956 // place_cursor(li, cs, FALSE);
2958 place_cursor(li, cs, TRUE);
2961 // write line out to terminal
2962 fwrite(&sp[cs], ce - cs + 1, 1, stdout);
2966 place_cursor(crow, ccol, TRUE);
2968 old_offset = offset;
2972 //---------------------------------------------------------------------
2973 //----- the Ascii Chart -----------------------------------------------
2975 // 00 nul 01 soh 02 stx 03 etx 04 eot 05 enq 06 ack 07 bel
2976 // 08 bs 09 ht 0a nl 0b vt 0c np 0d cr 0e so 0f si
2977 // 10 dle 11 dc1 12 dc2 13 dc3 14 dc4 15 nak 16 syn 17 etb
2978 // 18 can 19 em 1a sub 1b esc 1c fs 1d gs 1e rs 1f us
2979 // 20 sp 21 ! 22 " 23 # 24 $ 25 % 26 & 27 '
2980 // 28 ( 29 ) 2a * 2b + 2c , 2d - 2e . 2f /
2981 // 30 0 31 1 32 2 33 3 34 4 35 5 36 6 37 7
2982 // 38 8 39 9 3a : 3b ; 3c < 3d = 3e > 3f ?
2983 // 40 @ 41 A 42 B 43 C 44 D 45 E 46 F 47 G
2984 // 48 H 49 I 4a J 4b K 4c L 4d M 4e N 4f O
2985 // 50 P 51 Q 52 R 53 S 54 T 55 U 56 V 57 W
2986 // 58 X 59 Y 5a Z 5b [ 5c \ 5d ] 5e ^ 5f _
2987 // 60 ` 61 a 62 b 63 c 64 d 65 e 66 f 67 g
2988 // 68 h 69 i 6a j 6b k 6c l 6d m 6e n 6f o
2989 // 70 p 71 q 72 r 73 s 74 t 75 u 76 v 77 w
2990 // 78 x 79 y 7a z 7b { 7c | 7d } 7e ~ 7f del
2991 //---------------------------------------------------------------------
2993 //----- Execute a Vi Command -----------------------------------
2994 static void do_cmd(char c)
2996 const char *msg = msg; // for compiler
2997 char c1, *p, *q, *save_dot;
2999 int dir = dir; // for compiler
3002 // c1 = c; // quiet the compiler
3003 // cnt = yf = 0; // quiet the compiler
3004 // msg = p = q = save_dot = buf; // quiet the compiler
3005 memset(buf, '\0', 12);
3009 /* if this is a cursor key, skip these checks */
3023 if (cmd_mode == 2) {
3024 // flip-flop Insert/Replace mode
3025 if (c == VI_K_INSERT)
3027 // we are 'R'eplacing the current *dot with new char
3029 // don't Replace past E-o-l
3030 cmd_mode = 1; // convert to insert
3032 if (1 <= c || Isprint(c)) {
3034 dot = yank_delete(dot, dot, 0, YANKDEL); // delete char
3035 dot = char_insert(dot, c); // insert new char
3040 if (cmd_mode == 1) {
3041 // hitting "Insert" twice means "R" replace mode
3042 if (c == VI_K_INSERT) goto dc5;
3043 // insert the char c at "dot"
3044 if (1 <= c || Isprint(c)) {
3045 dot = char_insert(dot, c);
3060 #if ENABLE_FEATURE_VI_CRASHME
3061 case 0x14: // dc4 ctrl-T
3062 crashme = (crashme == 0) ? 1 : 0;
3091 //case 'u': // u- FIXME- there is no undo
3093 default: // unrecognised command
3101 not_implemented(buf);
3102 end_cmd_q(); // stop adding to q
3103 case 0x00: // nul- ignore
3105 case 2: // ctrl-B scroll up full screen
3106 case VI_K_PAGEUP: // Cursor Key Page Up
3107 dot_scroll(rows - 2, -1);
3109 case 4: // ctrl-D scroll down half screen
3110 dot_scroll((rows - 2) / 2, 1);
3112 case 5: // ctrl-E scroll down one line
3115 case 6: // ctrl-F scroll down full screen
3116 case VI_K_PAGEDOWN: // Cursor Key Page Down
3117 dot_scroll(rows - 2, 1);
3119 case 7: // ctrl-G show current status
3120 last_status_cksum = 0; // force status update
3122 case 'h': // h- move left
3123 case VI_K_LEFT: // cursor key Left
3124 case 8: // ctrl-H- move left (This may be ERASE char)
3125 case 0x7f: // DEL- move left (This may be ERASE char)
3131 case 10: // Newline ^J
3132 case 'j': // j- goto next line, same col
3133 case VI_K_DOWN: // cursor key Down
3137 dot_next(); // go to next B-o-l
3138 dot = move_to_col(dot, ccol + offset); // try stay in same col
3140 case 12: // ctrl-L force redraw whole screen
3141 case 18: // ctrl-R force redraw
3142 place_cursor(0, 0, FALSE); // put cursor in correct place
3143 clear_to_eos(); // tel terminal to erase display
3145 screen_erase(); // erase the internal screen buffer
3146 last_status_cksum = 0; // force status update
3147 refresh(TRUE); // this will redraw the entire display
3149 case 13: // Carriage Return ^M
3150 case '+': // +- goto next line
3157 case 21: // ctrl-U scroll up half screen
3158 dot_scroll((rows - 2) / 2, -1);
3160 case 25: // ctrl-Y scroll up one line
3166 cmd_mode = 0; // stop insrting
3168 last_status_cksum = 0; // force status update
3170 case ' ': // move right
3171 case 'l': // move right
3172 case VI_K_RIGHT: // Cursor Key Right
3178 #if ENABLE_FEATURE_VI_YANKMARK
3179 case '"': // "- name a register to use for Delete/Yank
3180 c1 = get_one_char();
3188 case '\'': // '- goto a specific mark
3189 c1 = get_one_char();
3194 q = mark[(unsigned char) c1];
3195 if (text <= q && q < end) {
3197 dot_begin(); // go to B-o-l
3200 } else if (c1 == '\'') { // goto previous context
3201 dot = swap_context(dot); // swap current and previous context
3202 dot_begin(); // go to B-o-l
3208 case 'm': // m- Mark a line
3209 // this is really stupid. If there are any inserts or deletes
3210 // between text[0] and dot then this mark will not point to the
3211 // correct location! It could be off by many lines!
3212 // Well..., at least its quick and dirty.
3213 c1 = get_one_char();
3217 // remember the line
3218 mark[(int) c1] = dot;
3223 case 'P': // P- Put register before
3224 case 'p': // p- put register after
3227 status_line_bold("Nothing in register %c", what_reg());
3230 // are we putting whole lines or strings
3231 if (strchr(p, '\n') != NULL) {
3233 dot_begin(); // putting lines- Put above
3236 // are we putting after very last line?
3237 if (end_line(dot) == (end - 1)) {
3238 dot = end; // force dot to end of text[]
3240 dot_next(); // next line, then put before
3245 dot_right(); // move to right, can move to NL
3247 dot = string_insert(dot, p); // insert the string
3248 end_cmd_q(); // stop adding to q
3250 case 'U': // U- Undo; replace current line with original version
3251 if (reg[Ureg] != 0) {
3252 p = begin_line(dot);
3254 p = text_hole_delete(p, q); // delete cur line
3255 p = string_insert(p, reg[Ureg]); // insert orig line
3260 #endif /* FEATURE_VI_YANKMARK */
3261 case '$': // $- goto end of line
3262 case VI_K_END: // Cursor Key End
3266 dot = end_line(dot);
3268 case '%': // %- find matching char of pair () [] {}
3269 for (q = dot; q < end && *q != '\n'; q++) {
3270 if (strchr("()[]{}", *q) != NULL) {
3271 // we found half of a pair
3272 p = find_pair(q, *q);
3284 case 'f': // f- forward to a user specified char
3285 last_forward_char = get_one_char(); // get the search char
3287 // dont separate these two commands. 'f' depends on ';'
3289 //**** fall through to ... ';'
3290 case ';': // ;- look at rest of line for last forward char
3294 if (last_forward_char == 0)
3297 while (q < end - 1 && *q != '\n' && *q != last_forward_char) {
3300 if (*q == last_forward_char)
3303 case ',': // repeat latest 'f' in opposite direction
3307 if (last_forward_char == 0)
3310 while (q >= text && *q != '\n' && *q != last_forward_char) {
3313 if (q >= text && *q == last_forward_char)
3317 case '-': // -- goto prev line
3324 #if ENABLE_FEATURE_VI_DOT_CMD
3325 case '.': // .- repeat the last modifying command
3326 // Stuff the last_modifying_cmd back into stdin
3327 // and let it be re-executed.
3329 last_modifying_cmd[lmc_len] = 0;
3330 ioq = ioq_start = xstrdup(last_modifying_cmd);
3334 #if ENABLE_FEATURE_VI_SEARCH
3335 case '?': // /- search for a pattern
3336 case '/': // /- search for a pattern
3339 q = get_input_line(buf); // get input line- use "status line"
3340 if (q[0] && !q[1]) {
3341 if (last_search_pattern[0])
3342 last_search_pattern[0] = c;
3343 goto dc3; // if no pat re-use old pat
3345 if (q[0]) { // strlen(q) > 1: new pat- save it and find
3346 // there is a new pat
3347 free(last_search_pattern);
3348 last_search_pattern = xstrdup(q);
3349 goto dc3; // now find the pattern
3351 // user changed mind and erased the "/"- do nothing
3353 case 'N': // N- backward search for last pattern
3357 dir = BACK; // assume BACKWARD search
3359 if (last_search_pattern[0] == '?') {
3363 goto dc4; // now search for pattern
3365 case 'n': // n- repeat search for last pattern
3366 // search rest of text[] starting at next char
3367 // if search fails return orignal "p" not the "p+1" address
3372 if (last_search_pattern == 0) {
3373 msg = "No previous regular expression";
3376 if (last_search_pattern[0] == '/') {
3377 dir = FORWARD; // assume FORWARD search
3380 if (last_search_pattern[0] == '?') {
3385 q = char_search(p, last_search_pattern + 1, dir, FULL);
3387 dot = q; // good search, update "dot"
3391 // no pattern found between "dot" and "end"- continue at top
3396 q = char_search(p, last_search_pattern + 1, dir, FULL);
3397 if (q != NULL) { // found something
3398 dot = q; // found new pattern- goto it
3399 msg = "search hit BOTTOM, continuing at TOP";
3401 msg = "search hit TOP, continuing at BOTTOM";
3404 msg = "Pattern not found";
3408 status_line_bold("%s", msg);
3410 case '{': // {- move backward paragraph
3411 q = char_search(dot, "\n\n", BACK, FULL);
3412 if (q != NULL) { // found blank line
3413 dot = next_line(q); // move to next blank line
3416 case '}': // }- move forward paragraph
3417 q = char_search(dot, "\n\n", FORWARD, FULL);
3418 if (q != NULL) { // found blank line
3419 dot = next_line(q); // move to next blank line
3422 #endif /* FEATURE_VI_SEARCH */
3423 case '0': // 0- goto begining of line
3433 if (c == '0' && cmdcnt < 1) {
3434 dot_begin(); // this was a standalone zero
3436 cmdcnt = cmdcnt * 10 + (c - '0'); // this 0 is part of a number
3439 case ':': // :- the colon mode commands
3440 p = get_input_line(":"); // get input line- use "status line"
3441 #if ENABLE_FEATURE_VI_COLON
3442 colon(p); // execute the command
3445 p++; // move past the ':'
3449 if (strncasecmp(p, "quit", cnt) == 0
3450 || strncasecmp(p, "q!", cnt) == 0 // delete lines
3452 if (file_modified && p[1] != '!') {
3453 status_line_bold("No write since last change (:quit! overrides)");
3457 } else if (strncasecmp(p, "write", cnt) == 0
3458 || strncasecmp(p, "wq", cnt) == 0
3459 || strncasecmp(p, "wn", cnt) == 0
3460 || strncasecmp(p, "x", cnt) == 0
3462 cnt = file_write(current_filename, text, end - 1);
3465 status_line_bold("Write error: %s", strerror(errno));
3468 last_file_modified = -1;
3469 status_line("\"%s\" %dL, %dC", current_filename, count_lines(text, end - 1), cnt);
3470 if (p[0] == 'x' || p[1] == 'q' || p[1] == 'n'
3471 || p[0] == 'X' || p[1] == 'Q' || p[1] == 'N'
3476 } else if (strncasecmp(p, "file", cnt) == 0) {
3477 last_status_cksum = 0; // force status update
3478 } else if (sscanf(p, "%d", &j) > 0) {
3479 dot = find_line(j); // go to line # j
3481 } else { // unrecognised cmd
3484 #endif /* !FEATURE_VI_COLON */
3486 case '<': // <- Left shift something
3487 case '>': // >- Right shift something
3488 cnt = count_lines(text, dot); // remember what line we are on
3489 c1 = get_one_char(); // get the type of thing to delete
3490 find_range(&p, &q, c1);
3491 yank_delete(p, q, 1, YANKONLY); // save copy before change
3494 i = count_lines(p, q); // # of lines we are shifting
3495 for ( ; i > 0; i--, p = next_line(p)) {
3497 // shift left- remove tab or 8 spaces
3499 // shrink buffer 1 char
3500 text_hole_delete(p, p);
3501 } else if (*p == ' ') {
3502 // we should be calculating columns, not just SPACE
3503 for (j = 0; *p == ' ' && j < tabstop; j++) {
3504 text_hole_delete(p, p);
3507 } else if (c == '>') {
3508 // shift right -- add tab or 8 spaces
3509 char_insert(p, '\t');
3512 dot = find_line(cnt); // what line were we on
3514 end_cmd_q(); // stop adding to q
3516 case 'A': // A- append at e-o-l
3517 dot_end(); // go to e-o-l
3518 //**** fall through to ... 'a'
3519 case 'a': // a- append after current char
3524 case 'B': // B- back a blank-delimited Word
3525 case 'E': // E- end of a blank-delimited word
3526 case 'W': // W- forward a blank-delimited word
3533 if (c == 'W' || isspace(dot[dir])) {
3534 dot = skip_thing(dot, 1, dir, S_TO_WS);
3535 dot = skip_thing(dot, 2, dir, S_OVER_WS);
3538 dot = skip_thing(dot, 1, dir, S_BEFORE_WS);
3540 case 'C': // C- Change to e-o-l
3541 case 'D': // D- delete to e-o-l
3543 dot = dollar_line(dot); // move to before NL
3544 // copy text into a register and delete
3545 dot = yank_delete(save_dot, dot, 0, YANKDEL); // delete to e-o-l
3547 goto dc_i; // start inserting
3548 #if ENABLE_FEATURE_VI_DOT_CMD
3550 end_cmd_q(); // stop adding to q
3553 case 'g': // 'gg' goto a line number (from vim)
3554 // (default to first line in file)
3555 c1 = get_one_char();
3560 not_implemented(buf);
3566 case 'G': // G- goto to a line number (default= E-O-F)
3567 dot = end - 1; // assume E-O-F
3569 dot = find_line(cmdcnt); // what line is #cmdcnt
3573 case 'H': // H- goto top line on screen
3575 if (cmdcnt > (rows - 1)) {
3576 cmdcnt = (rows - 1);
3583 case 'I': // I- insert before first non-blank
3586 //**** fall through to ... 'i'
3587 case 'i': // i- insert before current char
3588 case VI_K_INSERT: // Cursor Key Insert
3590 cmd_mode = 1; // start insrting
3592 case 'J': // J- join current and next lines together
3596 dot_end(); // move to NL
3597 if (dot < end - 1) { // make sure not last char in text[]
3598 *dot++ = ' '; // replace NL with space
3600 while (isblank(*dot)) { // delete leading WS
3604 end_cmd_q(); // stop adding to q
3606 case 'L': // L- goto bottom line on screen
3608 if (cmdcnt > (rows - 1)) {
3609 cmdcnt = (rows - 1);
3617 case 'M': // M- goto middle line on screen
3619 for (cnt = 0; cnt < (rows-1) / 2; cnt++)
3620 dot = next_line(dot);
3622 case 'O': // O- open a empty line above
3624 p = begin_line(dot);
3625 if (p[-1] == '\n') {
3627 case 'o': // o- open a empty line below; Yes, I know it is in the middle of the "if (..."
3629 dot = char_insert(dot, '\n');
3632 dot = char_insert(dot, '\n'); // i\n ESC
3637 case 'R': // R- continuous Replace char
3644 case 'X': // X- delete char before dot
3645 case 'x': // x- delete the current char
3646 case 's': // s- substitute the current char
3653 if (dot[dir] != '\n') {
3655 dot--; // delete prev char
3656 dot = yank_delete(dot, dot, 0, YANKDEL); // delete char
3659 goto dc_i; // start insrting
3660 end_cmd_q(); // stop adding to q
3662 case 'Z': // Z- if modified, {write}; exit
3663 // ZZ means to save file (if necessary), then exit
3664 c1 = get_one_char();
3669 if (file_modified) {
3670 if (ENABLE_FEATURE_VI_READONLY && readonly_mode) {
3671 status_line_bold("\"%s\" File is read only", current_filename);
3674 cnt = file_write(current_filename, text, end - 1);
3677 status_line_bold("Write error: %s", strerror(errno));
3678 } else if (cnt == (end - 1 - text + 1)) {
3685 case '^': // ^- move to first non-blank on line
3689 case 'b': // b- back a word
3690 case 'e': // e- end of word
3697 if ((dot + dir) < text || (dot + dir) > end - 1)
3700 if (isspace(*dot)) {
3701 dot = skip_thing(dot, (c == 'e') ? 2 : 1, dir, S_OVER_WS);
3703 if (isalnum(*dot) || *dot == '_') {
3704 dot = skip_thing(dot, 1, dir, S_END_ALNUM);
3705 } else if (ispunct(*dot)) {
3706 dot = skip_thing(dot, 1, dir, S_END_PUNCT);
3709 case 'c': // c- change something
3710 case 'd': // d- delete something
3711 #if ENABLE_FEATURE_VI_YANKMARK
3712 case 'y': // y- yank something
3713 case 'Y': // Y- Yank a line
3716 int yf, ml, whole = 0;
3717 yf = YANKDEL; // assume either "c" or "d"
3718 #if ENABLE_FEATURE_VI_YANKMARK
3719 if (c == 'y' || c == 'Y')
3724 c1 = get_one_char(); // get the type of thing to delete
3725 // determine range, and whether it spans lines
3726 ml = find_range(&p, &q, c1);
3727 if (c1 == 27) { // ESC- user changed mind and wants out
3728 c = c1 = 27; // Escape- do nothing
3729 } else if (strchr("wW", c1)) {
3731 // don't include trailing WS as part of word
3732 while (isblank(*q)) {
3733 if (q <= text || q[-1] == '\n')
3738 dot = yank_delete(p, q, ml, yf); // delete word
3739 } else if (strchr("^0bBeEft%$ lh\b\177", c1)) {
3740 // partial line copy text into a register and delete
3741 dot = yank_delete(p, q, ml, yf); // delete word
3742 } else if (strchr("cdykjHL+-{}\r\n", c1)) {
3743 // whole line copy text into a register and delete
3744 dot = yank_delete(p, q, ml, yf); // delete lines
3747 // could not recognize object
3748 c = c1 = 27; // error-
3754 dot = char_insert(dot, '\n');
3755 // on the last line of file don't move to prev line
3756 if (whole && dot != (end-1)) {
3759 } else if (c == 'd') {
3765 // if CHANGING, not deleting, start inserting after the delete
3767 strcpy(buf, "Change");
3768 goto dc_i; // start inserting
3771 strcpy(buf, "Delete");
3773 #if ENABLE_FEATURE_VI_YANKMARK
3774 if (c == 'y' || c == 'Y') {
3775 strcpy(buf, "Yank");
3779 for (cnt = 0; p <= q; p++) {
3783 status_line("%s %d lines (%d chars) using [%c]",
3784 buf, cnt, strlen(reg[YDreg]), what_reg());
3786 end_cmd_q(); // stop adding to q
3790 case 'k': // k- goto prev line, same col
3791 case VI_K_UP: // cursor key Up
3796 dot = move_to_col(dot, ccol + offset); // try stay in same col
3798 case 'r': // r- replace the current char with user input
3799 c1 = get_one_char(); // get the replacement char
3804 end_cmd_q(); // stop adding to q
3806 case 't': // t- move to char prior to next x
3807 last_forward_char = get_one_char();
3809 if (*dot == last_forward_char)
3811 last_forward_char= 0;
3813 case 'w': // w- forward a word
3817 if (isalnum(*dot) || *dot == '_') { // we are on ALNUM
3818 dot = skip_thing(dot, 1, FORWARD, S_END_ALNUM);
3819 } else if (ispunct(*dot)) { // we are on PUNCT
3820 dot = skip_thing(dot, 1, FORWARD, S_END_PUNCT);
3823 dot++; // move over word
3824 if (isspace(*dot)) {
3825 dot = skip_thing(dot, 2, FORWARD, S_OVER_WS);
3829 c1 = get_one_char(); // get the replacement char
3832 cnt = (rows - 2) / 2; // put dot at center
3834 cnt = rows - 2; // put dot at bottom
3835 screenbegin = begin_line(dot); // start dot at top
3836 dot_scroll(cnt, -1);
3838 case '|': // |- move to column "cmdcnt"
3839 dot = move_to_col(dot, cmdcnt - 1); // try to move to column
3841 case '~': // ~- flip the case of letters a-z -> A-Z
3845 if (islower(*dot)) {
3846 *dot = toupper(*dot);
3848 } else if (isupper(*dot)) {
3849 *dot = tolower(*dot);
3853 end_cmd_q(); // stop adding to q
3855 //----- The Cursor and Function Keys -----------------------------
3856 case VI_K_HOME: // Cursor Key Home
3859 // The Fn keys could point to do_macro which could translate them
3860 case VI_K_FUN1: // Function Key F1
3861 case VI_K_FUN2: // Function Key F2
3862 case VI_K_FUN3: // Function Key F3
3863 case VI_K_FUN4: // Function Key F4
3864 case VI_K_FUN5: // Function Key F5
3865 case VI_K_FUN6: // Function Key F6
3866 case VI_K_FUN7: // Function Key F7
3867 case VI_K_FUN8: // Function Key F8
3868 case VI_K_FUN9: // Function Key F9
3869 case VI_K_FUN10: // Function Key F10
3870 case VI_K_FUN11: // Function Key F11
3871 case VI_K_FUN12: // Function Key F12
3876 // if text[] just became empty, add back an empty line
3878 char_insert(text, '\n'); // start empty buf with dummy line
3881 // it is OK for dot to exactly equal to end, otherwise check dot validity
3883 dot = bound_dot(dot); // make sure "dot" is valid
3885 #if ENABLE_FEATURE_VI_YANKMARK
3886 check_context(c); // update the current context
3890 cmdcnt = 0; // cmd was not a number, reset cmdcnt
3891 cnt = dot - begin_line(dot);
3892 // Try to stay off of the Newline
3893 if (*dot == '\n' && cnt > 0 && cmd_mode == 0)
3897 /* NB! the CRASHME code is unmaintained, and doesn't currently build */
3898 #if ENABLE_FEATURE_VI_CRASHME
3899 static int totalcmds = 0;
3900 static int Mp = 85; // Movement command Probability
3901 static int Np = 90; // Non-movement command Probability
3902 static int Dp = 96; // Delete command Probability
3903 static int Ip = 97; // Insert command Probability
3904 static int Yp = 98; // Yank command Probability
3905 static int Pp = 99; // Put command Probability
3906 static int M = 0, N = 0, I = 0, D = 0, Y = 0, P = 0, U = 0;
3907 static const char chars[20] = "\t012345 abcdABCD-=.$";
3908 static const char *const words[20] = {
3909 "this", "is", "a", "test",
3910 "broadcast", "the", "emergency", "of",
3911 "system", "quick", "brown", "fox",
3912 "jumped", "over", "lazy", "dogs",
3913 "back", "January", "Febuary", "March"
3915 static const char *const lines[20] = {
3916 "You should have received a copy of the GNU General Public License\n",
3917 "char c, cm, *cmd, *cmd1;\n",
3918 "generate a command by percentages\n",
3919 "Numbers may be typed as a prefix to some commands.\n",
3920 "Quit, discarding changes!\n",
3921 "Forced write, if permission originally not valid.\n",
3922 "In general, any ex or ed command (such as substitute or delete).\n",
3923 "I have tickets available for the Blazers vs LA Clippers for Monday, Janurary 1 at 1:00pm.\n",
3924 "Please get w/ me and I will go over it with you.\n",
3925 "The following is a list of scheduled, committed changes.\n",
3926 "1. Launch Norton Antivirus (Start, Programs, Norton Antivirus)\n",
3927 "Reminder....Town Meeting in Central Perk cafe today at 3:00pm.\n",
3928 "Any question about transactions please contact Sterling Huxley.\n",
3929 "I will try to get back to you by Friday, December 31.\n",
3930 "This Change will be implemented on Friday.\n",
3931 "Let me know if you have problems accessing this;\n",
3932 "Sterling Huxley recently added you to the access list.\n",
3933 "Would you like to go to lunch?\n",
3934 "The last command will be automatically run.\n",
3935 "This is too much english for a computer geek.\n",
3937 static char *multilines[20] = {
3938 "You should have received a copy of the GNU General Public License\n",
3939 "char c, cm, *cmd, *cmd1;\n",
3940 "generate a command by percentages\n",
3941 "Numbers may be typed as a prefix to some commands.\n",
3942 "Quit, discarding changes!\n",
3943 "Forced write, if permission originally not valid.\n",
3944 "In general, any ex or ed command (such as substitute or delete).\n",
3945 "I have tickets available for the Blazers vs LA Clippers for Monday, Janurary 1 at 1:00pm.\n",
3946 "Please get w/ me and I will go over it with you.\n",
3947 "The following is a list of scheduled, committed changes.\n",
3948 "1. Launch Norton Antivirus (Start, Programs, Norton Antivirus)\n",
3949 "Reminder....Town Meeting in Central Perk cafe today at 3:00pm.\n",
3950 "Any question about transactions please contact Sterling Huxley.\n",
3951 "I will try to get back to you by Friday, December 31.\n",
3952 "This Change will be implemented on Friday.\n",
3953 "Let me know if you have problems accessing this;\n",
3954 "Sterling Huxley recently added you to the access list.\n",
3955 "Would you like to go to lunch?\n",
3956 "The last command will be automatically run.\n",
3957 "This is too much english for a computer geek.\n",
3960 // create a random command to execute
3961 static void crash_dummy()
3963 static int sleeptime; // how long to pause between commands
3964 char c, cm, *cmd, *cmd1;
3965 int i, cnt, thing, rbi, startrbi, percent;
3967 // "dot" movement commands
3968 cmd1 = " \n\r\002\004\005\006\025\0310^$-+wWeEbBhjklHL";
3970 // is there already a command running?
3971 if (chars_to_parse > 0)
3975 sleeptime = 0; // how long to pause between commands
3976 memset(readbuffer, '\0', sizeof(readbuffer));
3977 // generate a command by percentages
3978 percent = (int) lrand48() % 100; // get a number from 0-99
3979 if (percent < Mp) { // Movement commands
3980 // available commands
3983 } else if (percent < Np) { // non-movement commands
3984 cmd = "mz<>\'\""; // available commands
3986 } else if (percent < Dp) { // Delete commands
3987 cmd = "dx"; // available commands
3989 } else if (percent < Ip) { // Inset commands
3990 cmd = "iIaAsrJ"; // available commands
3992 } else if (percent < Yp) { // Yank commands
3993 cmd = "yY"; // available commands
3995 } else if (percent < Pp) { // Put commands
3996 cmd = "pP"; // available commands
3999 // We do not know how to handle this command, try again
4003 // randomly pick one of the available cmds from "cmd[]"
4004 i = (int) lrand48() % strlen(cmd);
4006 if (strchr(":\024", cm))
4007 goto cd0; // dont allow colon or ctrl-T commands
4008 readbuffer[rbi++] = cm; // put cmd into input buffer
4010 // now we have the command-
4011 // there are 1, 2, and multi char commands
4012 // find out which and generate the rest of command as necessary
4013 if (strchr("dmryz<>\'\"", cm)) { // 2-char commands
4014 cmd1 = " \n\r0$^-+wWeEbBhjklHL";
4015 if (cm == 'm' || cm == '\'' || cm == '\"') { // pick a reg[]
4016 cmd1 = "abcdefghijklmnopqrstuvwxyz";
4018 thing = (int) lrand48() % strlen(cmd1); // pick a movement command
4020 readbuffer[rbi++] = c; // add movement to input buffer
4022 if (strchr("iIaAsc", cm)) { // multi-char commands
4024 // change some thing
4025 thing = (int) lrand48() % strlen(cmd1); // pick a movement command
4027 readbuffer[rbi++] = c; // add movement to input buffer
4029 thing = (int) lrand48() % 4; // what thing to insert
4030 cnt = (int) lrand48() % 10; // how many to insert
4031 for (i = 0; i < cnt; i++) {
4032 if (thing == 0) { // insert chars
4033 readbuffer[rbi++] = chars[((int) lrand48() % strlen(chars))];
4034 } else if (thing == 1) { // insert words
4035 strcat(readbuffer, words[(int) lrand48() % 20]);
4036 strcat(readbuffer, " ");
4037 sleeptime = 0; // how fast to type
4038 } else if (thing == 2) { // insert lines
4039 strcat(readbuffer, lines[(int) lrand48() % 20]);
4040 sleeptime = 0; // how fast to type
4041 } else { // insert multi-lines
4042 strcat(readbuffer, multilines[(int) lrand48() % 20]);
4043 sleeptime = 0; // how fast to type
4046 strcat(readbuffer, "\033");
4048 chars_to_parse = strlen(readbuffer);
4052 mysleep(sleeptime); // sleep 1/100 sec
4055 // test to see if there are any errors
4056 static void crash_test()
4058 static time_t oldtim;
4065 strcat(msg, "end<text ");
4067 if (end > textend) {
4068 strcat(msg, "end>textend ");
4071 strcat(msg, "dot<text ");
4074 strcat(msg, "dot>end ");
4076 if (screenbegin < text) {
4077 strcat(msg, "screenbegin<text ");
4079 if (screenbegin > end - 1) {
4080 strcat(msg, "screenbegin>end-1 ");
4084 printf("\n\n%d: \'%c\' %s\n\n\n%s[Hit return to continue]%s",
4085 totalcmds, last_input_char, msg, SOs, SOn);
4087 while (safe_read(STDIN_FILENO, d, 1) > 0) {
4088 if (d[0] == '\n' || d[0] == '\r')
4093 if (tim >= (oldtim + 3)) {
4094 sprintf(status_buffer,
4095 "Tot=%d: M=%d N=%d I=%d D=%d Y=%d P=%d U=%d size=%d",
4096 totalcmds, M, N, I, D, Y, P, U, end - text + 1);