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 (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 n = safe_read(0, readbuffer, 1);
2250 go_bottom_and_clear_to_eol();
2251 cookmode(); // terminal to "cooked"
2252 bb_error_msg_and_die("can't read user input");
2256 // Grab character to return from buffer
2258 // Returning NUL from this routine would be bad.
2262 if (n) memmove(readbuffer, readbuffer + 1, n);
2264 // If it's an escape sequence, loop through known matches.
2266 const struct esc_cmds *eindex;
2268 for (eindex = esccmds; eindex < esccmds + ARRAY_SIZE(esccmds); eindex++) {
2269 // n - position in seq to read
2270 int i = 0; // position in seq to compare
2271 int cnt = strnlen(eindex->seq, 4);
2273 // Loop through chars in this sequence.
2275 // We've matched this escape sequence up to [i-1]
2277 // Need more chars, read another one if it wouldn't block.
2278 // (Note that escape sequences come in as a unit,
2279 // so if we would block it's not really an escape sequence.)
2282 pfd.events = POLLIN;
2283 // Rob needed 300ms timeout on qemu
2284 if (safe_poll(&pfd, 1, /*timeout:*/ 300)) {
2285 if (safe_read(0, readbuffer + n, 1) <= 0)
2290 // Array is sorted from shortest to longest,
2291 // we can't match anything later in array,
2292 // break out of both loops.
2296 if (readbuffer[i] != eindex->seq[i])
2297 break; // try next seq
2298 if (++i == cnt) { // entire seq matched
2305 // We did not find matching sequence, it was a bare ESC.
2306 // We possibly read and stored more input in readbuffer by now.
2314 //----- IO Routines --------------------------------------------
2315 static char get_one_char(void)
2319 #if ENABLE_FEATURE_VI_DOT_CMD
2321 // we are not adding to the q.
2322 // but, we may be reading from a q
2324 // there is no current q, read from STDIN
2325 c = readit(); // get the users input
2327 // there is a queue to get chars from first
2330 // the end of the q, read from STDIN
2332 ioq_start = ioq = 0;
2333 c = readit(); // get the users input
2337 // adding STDIN chars to q
2338 c = readit(); // get the users input
2339 if (lmc_len >= MAX_INPUT_LEN - 1) {
2340 status_line_bold("last_modifying_cmd overrun");
2342 // add new char to q
2343 last_modifying_cmd[lmc_len++] = c;
2347 c = readit(); // get the users input
2348 #endif /* FEATURE_VI_DOT_CMD */
2352 // Get input line (uses "status line" area)
2353 static char *get_input_line(const char *prompt)
2355 // char [MAX_INPUT_LEN]
2356 #define buf get_input_line__buf
2361 strcpy(buf, prompt);
2362 last_status_cksum = 0; // force status update
2363 go_bottom_and_clear_to_eol();
2364 write1(prompt); // write out the :, /, or ? prompt
2367 while (i < MAX_INPUT_LEN) {
2369 if (c == '\n' || c == '\r' || c == 27)
2370 break; // this is end of input
2371 if (c == erase_char || c == 8 || c == 127) {
2372 // user wants to erase prev char
2374 write1("\b \b"); // erase char on screen
2375 if (i <= 0) // user backs up before b-o-l, exit
2388 static int file_size(const char *fn) // what is the byte size of "fn"
2394 if (fn && fn[0] && stat(fn, &st_buf) == 0) // see if file exists
2395 cnt = (int) st_buf.st_size;
2399 static int file_insert(const char *fn, char *p
2400 USE_FEATURE_VI_READONLY(, int update_ro_status))
2404 struct stat statbuf;
2407 if (stat(fn, &statbuf) < 0) {
2408 status_line_bold("\"%s\" %s", fn, strerror(errno));
2411 if (!S_ISREG(statbuf.st_mode)) {
2412 // This is not a regular file
2413 status_line_bold("\"%s\" Not a regular file", fn);
2416 if (p < text || p > end) {
2417 status_line_bold("Trying to insert file outside of memory");
2421 // read file to buffer
2422 fd = open(fn, O_RDONLY);
2424 status_line_bold("\"%s\" %s", fn, strerror(errno));
2427 size = statbuf.st_size;
2428 p = text_hole_make(p, size);
2429 cnt = safe_read(fd, p, size);
2431 status_line_bold("\"%s\" %s", fn, strerror(errno));
2432 p = text_hole_delete(p, p + size - 1); // un-do buffer insert
2433 } else if (cnt < size) {
2434 // There was a partial read, shrink unused space text[]
2435 p = text_hole_delete(p + cnt, p + (size - cnt) - 1); // un-do buffer insert
2436 status_line_bold("cannot read all of file \"%s\"", fn);
2442 #if ENABLE_FEATURE_VI_READONLY
2443 if (update_ro_status
2444 && ((access(fn, W_OK) < 0) ||
2445 /* root will always have access()
2446 * so we check fileperms too */
2447 !(statbuf.st_mode & (S_IWUSR | S_IWGRP | S_IWOTH))
2450 SET_READONLY_FILE(readonly_mode);
2456 static int file_write(char *fn, char *first, char *last)
2458 int fd, cnt, charcnt;
2461 status_line_bold("No current filename");
2465 /* By popular request we do not open file with O_TRUNC,
2466 * but instead ftruncate() it _after_ successful write.
2467 * Might reduce amount of data lost on power fail etc.
2469 fd = open(fn, (O_WRONLY | O_CREAT), 0666);
2472 cnt = last - first + 1;
2473 charcnt = full_write(fd, first, cnt);
2474 ftruncate(fd, charcnt);
2475 if (charcnt == cnt) {
2477 //file_modified = FALSE;
2485 //----- Terminal Drawing ---------------------------------------
2486 // The terminal is made up of 'rows' line of 'columns' columns.
2487 // classically this would be 24 x 80.
2488 // screen coordinates
2494 // 23,0 ... 23,79 <- status line
2496 //----- Move the cursor to row x col (count from 0, not 1) -------
2497 static void place_cursor(int row, int col, int optimize)
2499 char cm1[sizeof(CMrc) + sizeof(int)*3 * 2];
2500 #if ENABLE_FEATURE_VI_OPTIMIZE_CURSOR
2502 SZ_UP = sizeof(CMup),
2503 SZ_DN = sizeof(CMdown),
2504 SEQ_SIZE = SZ_UP > SZ_DN ? SZ_UP : SZ_DN,
2506 char cm2[SEQ_SIZE * 5 + 32]; // bigger than worst case size
2510 if (row < 0) row = 0;
2511 if (row >= rows) row = rows - 1;
2512 if (col < 0) col = 0;
2513 if (col >= columns) col = columns - 1;
2515 //----- 1. Try the standard terminal ESC sequence
2516 sprintf(cm1, CMrc, row + 1, col + 1);
2519 #if ENABLE_FEATURE_VI_OPTIMIZE_CURSOR
2520 if (optimize && col < 16) {
2522 int Rrow = last_row;
2523 int diff = Rrow - row;
2525 if (diff < -5 || diff > 5)
2528 //----- find the minimum # of chars to move cursor -------------
2529 //----- 2. Try moving with discreet chars (Newline, [back]space, ...)
2532 // move to the correct row
2533 while (row < Rrow) {
2534 // the cursor has to move up
2538 while (row > Rrow) {
2539 // the cursor has to move down
2540 strcat(cm2, CMdown);
2544 // now move to the correct column
2545 strcat(cm2, "\r"); // start at col 0
2546 // just send out orignal source char to get to correct place
2547 screenp = &screen[row * columns]; // start of screen line
2548 strncat(cm2, screenp, col);
2550 // pick the shortest cursor motion to send out
2551 if (strlen(cm2) < strlen(cm)) {
2557 #endif /* FEATURE_VI_OPTIMIZE_CURSOR */
2561 //----- Erase from cursor to end of line -----------------------
2562 static void clear_to_eol(void)
2564 write1(Ceol); // Erase from cursor to end of line
2567 static void go_bottom_and_clear_to_eol(void)
2569 place_cursor(rows - 1, 0, FALSE); // go to bottom of screen
2570 clear_to_eol(); // erase to end of line
2573 //----- Erase from cursor to end of screen -----------------------
2574 static void clear_to_eos(void)
2576 write1(Ceos); // Erase from cursor to end of screen
2579 //----- Start standout mode ------------------------------------
2580 static void standout_start(void) // send "start reverse video" sequence
2582 write1(SOs); // Start reverse video mode
2585 //----- End standout mode --------------------------------------
2586 static void standout_end(void) // send "end reverse video" sequence
2588 write1(SOn); // End reverse video mode
2591 //----- Flash the screen --------------------------------------
2592 static void flash(int h)
2594 standout_start(); // send "start reverse video" sequence
2597 standout_end(); // send "end reverse video" sequence
2601 static void Indicate_Error(void)
2603 #if ENABLE_FEATURE_VI_CRASHME
2605 return; // generate a random command
2608 write1(bell); // send out a bell character
2614 //----- Screen[] Routines --------------------------------------
2615 //----- Erase the Screen[] memory ------------------------------
2616 static void screen_erase(void)
2618 memset(screen, ' ', screensize); // clear new screen
2621 static int bufsum(char *buf, int count)
2624 char *e = buf + count;
2627 sum += (unsigned char) *buf++;
2631 //----- Draw the status line at bottom of the screen -------------
2632 static void show_status_line(void)
2634 int cnt = 0, cksum = 0;
2636 // either we already have an error or status message, or we
2638 if (!have_status_msg) {
2639 cnt = format_edit_status();
2640 cksum = bufsum(status_buffer, cnt);
2642 if (have_status_msg || ((cnt > 0 && last_status_cksum != cksum))) {
2643 last_status_cksum = cksum; // remember if we have seen this line
2644 go_bottom_and_clear_to_eol();
2645 write1(status_buffer);
2646 if (have_status_msg) {
2647 if (((int)strlen(status_buffer) - (have_status_msg - 1)) >
2649 have_status_msg = 0;
2652 have_status_msg = 0;
2654 place_cursor(crow, ccol, FALSE); // put cursor back in correct place
2659 //----- format the status buffer, the bottom line of screen ------
2660 // format status buffer, with STANDOUT mode
2661 static void status_line_bold(const char *format, ...)
2665 va_start(args, format);
2666 strcpy(status_buffer, SOs); // Terminal standout mode on
2667 vsprintf(status_buffer + sizeof(SOs)-1, format, args);
2668 strcat(status_buffer, SOn); // Terminal standout mode off
2671 have_status_msg = 1 + sizeof(SOs) + sizeof(SOn) - 2;
2674 // format status buffer
2675 static void status_line(const char *format, ...)
2679 va_start(args, format);
2680 vsprintf(status_buffer, format, args);
2683 have_status_msg = 1;
2686 // copy s to buf, convert unprintable
2687 static void print_literal(char *buf, const char *s)
2700 c_is_no_print = (c & 0x80) && !Isprint(c);
2701 if (c_is_no_print) {
2705 if (c < ' ' || c == 127) {
2718 if (strlen(buf) > MAX_INPUT_LEN - 10) // paranoia
2723 static void not_implemented(const char *s)
2725 char buf[MAX_INPUT_LEN];
2727 print_literal(buf, s);
2728 status_line_bold("\'%s\' is not implemented", buf);
2731 // show file status on status line
2732 static int format_edit_status(void)
2734 static const char cmd_mode_indicator[] ALIGN1 = "-IR-";
2736 #define tot format_edit_status__tot
2738 int cur, percent, ret, trunc_at;
2740 // file_modified is now a counter rather than a flag. this
2741 // helps reduce the amount of line counting we need to do.
2742 // (this will cause a mis-reporting of modified status
2743 // once every MAXINT editing operations.)
2745 // it would be nice to do a similar optimization here -- if
2746 // we haven't done a motion that could have changed which line
2747 // we're on, then we shouldn't have to do this count_lines()
2748 cur = count_lines(text, dot);
2750 // reduce counting -- the total lines can't have
2751 // changed if we haven't done any edits.
2752 if (file_modified != last_file_modified) {
2753 tot = cur + count_lines(dot, end - 1) - 1;
2754 last_file_modified = file_modified;
2757 // current line percent
2758 // ------------- ~~ ----------
2761 percent = (100 * cur) / tot;
2767 trunc_at = columns < STATUS_BUFFER_LEN-1 ?
2768 columns : STATUS_BUFFER_LEN-1;
2770 ret = snprintf(status_buffer, trunc_at+1,
2771 #if ENABLE_FEATURE_VI_READONLY
2772 "%c %s%s%s %d/%d %d%%",
2774 "%c %s%s %d/%d %d%%",
2776 cmd_mode_indicator[cmd_mode & 3],
2777 (current_filename != NULL ? current_filename : "No file"),
2778 #if ENABLE_FEATURE_VI_READONLY
2779 (readonly_mode ? " [Readonly]" : ""),
2781 (file_modified ? " [Modified]" : ""),
2784 if (ret >= 0 && ret < trunc_at)
2785 return ret; /* it all fit */
2787 return trunc_at; /* had to truncate */
2791 //----- Force refresh of all Lines -----------------------------
2792 static void redraw(int full_screen)
2794 place_cursor(0, 0, FALSE); // put cursor in correct place
2795 clear_to_eos(); // tell terminal to erase display
2796 screen_erase(); // erase the internal screen buffer
2797 last_status_cksum = 0; // force status update
2798 refresh(full_screen); // this will redraw the entire display
2802 //----- Format a text[] line into a buffer ---------------------
2803 static char* format_line(char *src /*, int li*/)
2808 char *dest = scr_out_buf; // [MAX_SCR_COLS + MAX_TABSTOP * 2]
2810 c = '~'; // char in col 0 in non-existent lines is '~'
2812 while (co < columns + tabstop) {
2813 // have we gone past the end?
2818 if ((c & 0x80) && !Isprint(c)) {
2821 if (c < ' ' || c == 0x7f) {
2825 while ((co % tabstop) != (tabstop - 1)) {
2833 c += '@'; // Ctrl-X -> 'X'
2838 // discard scrolled-off-to-the-left portion,
2839 // in tabstop-sized pieces
2840 if (ofs >= tabstop && co >= tabstop) {
2841 memmove(dest, dest + tabstop, co);
2848 // check "short line, gigantic offset" case
2851 // discard last scrolled off part
2854 // fill the rest with spaces
2856 memset(&dest[co], ' ', columns - co);
2860 //----- Refresh the changed screen lines -----------------------
2861 // Copy the source line from text[] into the buffer and note
2862 // if the current screenline is different from the new buffer.
2863 // If they differ then that line needs redrawing on the terminal.
2865 static void refresh(int full_screen)
2867 #define old_offset refresh__old_offset
2870 char *tp, *sp; // pointer into text[] and screen[]
2872 if (ENABLE_FEATURE_VI_WIN_RESIZE) {
2873 unsigned c = columns, r = rows;
2874 get_terminal_width_height(0, &columns, &rows);
2875 if (rows > MAX_SCR_ROWS) rows = MAX_SCR_ROWS;
2876 if (columns > MAX_SCR_COLS) columns = MAX_SCR_COLS;
2877 full_screen |= (c - columns) | (r - rows);
2879 sync_cursor(dot, &crow, &ccol); // where cursor will be (on "dot")
2880 tp = screenbegin; // index into text[] of top line
2882 // compare text[] to screen[] and mark screen[] lines that need updating
2883 for (li = 0; li < rows - 1; li++) {
2884 int cs, ce; // column start & end
2886 // format current text line
2887 out_buf = format_line(tp /*, li*/);
2889 // skip to the end of the current text[] line
2891 char *t = memchr(tp, '\n', end - tp);
2892 if (!t) t = end - 1;
2896 // see if there are any changes between vitual screen and out_buf
2897 changed = FALSE; // assume no change
2900 sp = &screen[li * columns]; // start of screen line
2902 // force re-draw of every single column from 0 - columns-1
2905 // compare newly formatted buffer with virtual screen
2906 // look forward for first difference between buf and screen
2907 for (; cs <= ce; cs++) {
2908 if (out_buf[cs] != sp[cs]) {
2909 changed = TRUE; // mark for redraw
2914 // look backward for last difference between out_buf and screen
2915 for (; ce >= cs; ce--) {
2916 if (out_buf[ce] != sp[ce]) {
2917 changed = TRUE; // mark for redraw
2921 // now, cs is index of first diff, and ce is index of last diff
2923 // if horz offset has changed, force a redraw
2924 if (offset != old_offset) {
2929 // make a sanity check of columns indexes
2931 if (ce > columns - 1) ce = columns - 1;
2932 if (cs > ce) { cs = 0; ce = columns - 1; }
2933 // is there a change between vitual screen and out_buf
2935 // copy changed part of buffer to virtual screen
2936 memcpy(sp+cs, out_buf+cs, ce-cs+1);
2938 // move cursor to column of first change
2939 //if (offset != old_offset) {
2940 // // place_cursor is still too stupid
2941 // // to handle offsets correctly
2942 // place_cursor(li, cs, FALSE);
2944 place_cursor(li, cs, TRUE);
2947 // write line out to terminal
2948 fwrite(&sp[cs], ce - cs + 1, 1, stdout);
2952 place_cursor(crow, ccol, TRUE);
2954 old_offset = offset;
2958 //---------------------------------------------------------------------
2959 //----- the Ascii Chart -----------------------------------------------
2961 // 00 nul 01 soh 02 stx 03 etx 04 eot 05 enq 06 ack 07 bel
2962 // 08 bs 09 ht 0a nl 0b vt 0c np 0d cr 0e so 0f si
2963 // 10 dle 11 dc1 12 dc2 13 dc3 14 dc4 15 nak 16 syn 17 etb
2964 // 18 can 19 em 1a sub 1b esc 1c fs 1d gs 1e rs 1f us
2965 // 20 sp 21 ! 22 " 23 # 24 $ 25 % 26 & 27 '
2966 // 28 ( 29 ) 2a * 2b + 2c , 2d - 2e . 2f /
2967 // 30 0 31 1 32 2 33 3 34 4 35 5 36 6 37 7
2968 // 38 8 39 9 3a : 3b ; 3c < 3d = 3e > 3f ?
2969 // 40 @ 41 A 42 B 43 C 44 D 45 E 46 F 47 G
2970 // 48 H 49 I 4a J 4b K 4c L 4d M 4e N 4f O
2971 // 50 P 51 Q 52 R 53 S 54 T 55 U 56 V 57 W
2972 // 58 X 59 Y 5a Z 5b [ 5c \ 5d ] 5e ^ 5f _
2973 // 60 ` 61 a 62 b 63 c 64 d 65 e 66 f 67 g
2974 // 68 h 69 i 6a j 6b k 6c l 6d m 6e n 6f o
2975 // 70 p 71 q 72 r 73 s 74 t 75 u 76 v 77 w
2976 // 78 x 79 y 7a z 7b { 7c | 7d } 7e ~ 7f del
2977 //---------------------------------------------------------------------
2979 //----- Execute a Vi Command -----------------------------------
2980 static void do_cmd(char c)
2982 const char *msg = msg; // for compiler
2983 char c1, *p, *q, *save_dot;
2985 int dir = dir; // for compiler
2988 // c1 = c; // quiet the compiler
2989 // cnt = yf = 0; // quiet the compiler
2990 // msg = p = q = save_dot = buf; // quiet the compiler
2991 memset(buf, '\0', 12);
2995 /* if this is a cursor key, skip these checks */
3009 if (cmd_mode == 2) {
3010 // flip-flop Insert/Replace mode
3011 if (c == VI_K_INSERT)
3013 // we are 'R'eplacing the current *dot with new char
3015 // don't Replace past E-o-l
3016 cmd_mode = 1; // convert to insert
3018 if (1 <= c || Isprint(c)) {
3020 dot = yank_delete(dot, dot, 0, YANKDEL); // delete char
3021 dot = char_insert(dot, c); // insert new char
3026 if (cmd_mode == 1) {
3027 // hitting "Insert" twice means "R" replace mode
3028 if (c == VI_K_INSERT) goto dc5;
3029 // insert the char c at "dot"
3030 if (1 <= c || Isprint(c)) {
3031 dot = char_insert(dot, c);
3046 #if ENABLE_FEATURE_VI_CRASHME
3047 case 0x14: // dc4 ctrl-T
3048 crashme = (crashme == 0) ? 1 : 0;
3077 //case 'u': // u- FIXME- there is no undo
3079 default: // unrecognised command
3087 not_implemented(buf);
3088 end_cmd_q(); // stop adding to q
3089 case 0x00: // nul- ignore
3091 case 2: // ctrl-B scroll up full screen
3092 case VI_K_PAGEUP: // Cursor Key Page Up
3093 dot_scroll(rows - 2, -1);
3095 case 4: // ctrl-D scroll down half screen
3096 dot_scroll((rows - 2) / 2, 1);
3098 case 5: // ctrl-E scroll down one line
3101 case 6: // ctrl-F scroll down full screen
3102 case VI_K_PAGEDOWN: // Cursor Key Page Down
3103 dot_scroll(rows - 2, 1);
3105 case 7: // ctrl-G show current status
3106 last_status_cksum = 0; // force status update
3108 case 'h': // h- move left
3109 case VI_K_LEFT: // cursor key Left
3110 case 8: // ctrl-H- move left (This may be ERASE char)
3111 case 0x7f: // DEL- move left (This may be ERASE char)
3117 case 10: // Newline ^J
3118 case 'j': // j- goto next line, same col
3119 case VI_K_DOWN: // cursor key Down
3123 dot_next(); // go to next B-o-l
3124 dot = move_to_col(dot, ccol + offset); // try stay in same col
3126 case 12: // ctrl-L force redraw whole screen
3127 case 18: // ctrl-R force redraw
3128 place_cursor(0, 0, FALSE); // put cursor in correct place
3129 clear_to_eos(); // tel terminal to erase display
3131 screen_erase(); // erase the internal screen buffer
3132 last_status_cksum = 0; // force status update
3133 refresh(TRUE); // this will redraw the entire display
3135 case 13: // Carriage Return ^M
3136 case '+': // +- goto next line
3143 case 21: // ctrl-U scroll up half screen
3144 dot_scroll((rows - 2) / 2, -1);
3146 case 25: // ctrl-Y scroll up one line
3152 cmd_mode = 0; // stop insrting
3154 last_status_cksum = 0; // force status update
3156 case ' ': // move right
3157 case 'l': // move right
3158 case VI_K_RIGHT: // Cursor Key Right
3164 #if ENABLE_FEATURE_VI_YANKMARK
3165 case '"': // "- name a register to use for Delete/Yank
3166 c1 = get_one_char();
3174 case '\'': // '- goto a specific mark
3175 c1 = get_one_char();
3180 q = mark[(unsigned char) c1];
3181 if (text <= q && q < end) {
3183 dot_begin(); // go to B-o-l
3186 } else if (c1 == '\'') { // goto previous context
3187 dot = swap_context(dot); // swap current and previous context
3188 dot_begin(); // go to B-o-l
3194 case 'm': // m- Mark a line
3195 // this is really stupid. If there are any inserts or deletes
3196 // between text[0] and dot then this mark will not point to the
3197 // correct location! It could be off by many lines!
3198 // Well..., at least its quick and dirty.
3199 c1 = get_one_char();
3203 // remember the line
3204 mark[(int) c1] = dot;
3209 case 'P': // P- Put register before
3210 case 'p': // p- put register after
3213 status_line_bold("Nothing in register %c", what_reg());
3216 // are we putting whole lines or strings
3217 if (strchr(p, '\n') != NULL) {
3219 dot_begin(); // putting lines- Put above
3222 // are we putting after very last line?
3223 if (end_line(dot) == (end - 1)) {
3224 dot = end; // force dot to end of text[]
3226 dot_next(); // next line, then put before
3231 dot_right(); // move to right, can move to NL
3233 dot = string_insert(dot, p); // insert the string
3234 end_cmd_q(); // stop adding to q
3236 case 'U': // U- Undo; replace current line with original version
3237 if (reg[Ureg] != 0) {
3238 p = begin_line(dot);
3240 p = text_hole_delete(p, q); // delete cur line
3241 p = string_insert(p, reg[Ureg]); // insert orig line
3246 #endif /* FEATURE_VI_YANKMARK */
3247 case '$': // $- goto end of line
3248 case VI_K_END: // Cursor Key End
3252 dot = end_line(dot);
3254 case '%': // %- find matching char of pair () [] {}
3255 for (q = dot; q < end && *q != '\n'; q++) {
3256 if (strchr("()[]{}", *q) != NULL) {
3257 // we found half of a pair
3258 p = find_pair(q, *q);
3270 case 'f': // f- forward to a user specified char
3271 last_forward_char = get_one_char(); // get the search char
3273 // dont separate these two commands. 'f' depends on ';'
3275 //**** fall through to ... ';'
3276 case ';': // ;- look at rest of line for last forward char
3280 if (last_forward_char == 0)
3283 while (q < end - 1 && *q != '\n' && *q != last_forward_char) {
3286 if (*q == last_forward_char)
3289 case ',': // repeat latest 'f' in opposite direction
3293 if (last_forward_char == 0)
3296 while (q >= text && *q != '\n' && *q != last_forward_char) {
3299 if (q >= text && *q == last_forward_char)
3303 case '-': // -- goto prev line
3310 #if ENABLE_FEATURE_VI_DOT_CMD
3311 case '.': // .- repeat the last modifying command
3312 // Stuff the last_modifying_cmd back into stdin
3313 // and let it be re-executed.
3315 last_modifying_cmd[lmc_len] = 0;
3316 ioq = ioq_start = xstrdup(last_modifying_cmd);
3320 #if ENABLE_FEATURE_VI_SEARCH
3321 case '?': // /- search for a pattern
3322 case '/': // /- search for a pattern
3325 q = get_input_line(buf); // get input line- use "status line"
3326 if (q[0] && !q[1]) {
3327 if (last_search_pattern[0])
3328 last_search_pattern[0] = c;
3329 goto dc3; // if no pat re-use old pat
3331 if (q[0]) { // strlen(q) > 1: new pat- save it and find
3332 // there is a new pat
3333 free(last_search_pattern);
3334 last_search_pattern = xstrdup(q);
3335 goto dc3; // now find the pattern
3337 // user changed mind and erased the "/"- do nothing
3339 case 'N': // N- backward search for last pattern
3343 dir = BACK; // assume BACKWARD search
3345 if (last_search_pattern[0] == '?') {
3349 goto dc4; // now search for pattern
3351 case 'n': // n- repeat search for last pattern
3352 // search rest of text[] starting at next char
3353 // if search fails return orignal "p" not the "p+1" address
3358 if (last_search_pattern == 0) {
3359 msg = "No previous regular expression";
3362 if (last_search_pattern[0] == '/') {
3363 dir = FORWARD; // assume FORWARD search
3366 if (last_search_pattern[0] == '?') {
3371 q = char_search(p, last_search_pattern + 1, dir, FULL);
3373 dot = q; // good search, update "dot"
3377 // no pattern found between "dot" and "end"- continue at top
3382 q = char_search(p, last_search_pattern + 1, dir, FULL);
3383 if (q != NULL) { // found something
3384 dot = q; // found new pattern- goto it
3385 msg = "search hit BOTTOM, continuing at TOP";
3387 msg = "search hit TOP, continuing at BOTTOM";
3390 msg = "Pattern not found";
3394 status_line_bold("%s", msg);
3396 case '{': // {- move backward paragraph
3397 q = char_search(dot, "\n\n", BACK, FULL);
3398 if (q != NULL) { // found blank line
3399 dot = next_line(q); // move to next blank line
3402 case '}': // }- move forward paragraph
3403 q = char_search(dot, "\n\n", FORWARD, FULL);
3404 if (q != NULL) { // found blank line
3405 dot = next_line(q); // move to next blank line
3408 #endif /* FEATURE_VI_SEARCH */
3409 case '0': // 0- goto begining of line
3419 if (c == '0' && cmdcnt < 1) {
3420 dot_begin(); // this was a standalone zero
3422 cmdcnt = cmdcnt * 10 + (c - '0'); // this 0 is part of a number
3425 case ':': // :- the colon mode commands
3426 p = get_input_line(":"); // get input line- use "status line"
3427 #if ENABLE_FEATURE_VI_COLON
3428 colon(p); // execute the command
3431 p++; // move past the ':'
3435 if (strncasecmp(p, "quit", cnt) == 0
3436 || strncasecmp(p, "q!", cnt) == 0 // delete lines
3438 if (file_modified && p[1] != '!') {
3439 status_line_bold("No write since last change (:quit! overrides)");
3443 } else if (strncasecmp(p, "write", cnt) == 0
3444 || strncasecmp(p, "wq", cnt) == 0
3445 || strncasecmp(p, "wn", cnt) == 0
3446 || strncasecmp(p, "x", cnt) == 0
3448 cnt = file_write(current_filename, text, end - 1);
3451 status_line_bold("Write error: %s", strerror(errno));
3454 last_file_modified = -1;
3455 status_line("\"%s\" %dL, %dC", current_filename, count_lines(text, end - 1), cnt);
3456 if (p[0] == 'x' || p[1] == 'q' || p[1] == 'n'
3457 || p[0] == 'X' || p[1] == 'Q' || p[1] == 'N'
3462 } else if (strncasecmp(p, "file", cnt) == 0) {
3463 last_status_cksum = 0; // force status update
3464 } else if (sscanf(p, "%d", &j) > 0) {
3465 dot = find_line(j); // go to line # j
3467 } else { // unrecognised cmd
3470 #endif /* !FEATURE_VI_COLON */
3472 case '<': // <- Left shift something
3473 case '>': // >- Right shift something
3474 cnt = count_lines(text, dot); // remember what line we are on
3475 c1 = get_one_char(); // get the type of thing to delete
3476 find_range(&p, &q, c1);
3477 yank_delete(p, q, 1, YANKONLY); // save copy before change
3480 i = count_lines(p, q); // # of lines we are shifting
3481 for ( ; i > 0; i--, p = next_line(p)) {
3483 // shift left- remove tab or 8 spaces
3485 // shrink buffer 1 char
3486 text_hole_delete(p, p);
3487 } else if (*p == ' ') {
3488 // we should be calculating columns, not just SPACE
3489 for (j = 0; *p == ' ' && j < tabstop; j++) {
3490 text_hole_delete(p, p);
3493 } else if (c == '>') {
3494 // shift right -- add tab or 8 spaces
3495 char_insert(p, '\t');
3498 dot = find_line(cnt); // what line were we on
3500 end_cmd_q(); // stop adding to q
3502 case 'A': // A- append at e-o-l
3503 dot_end(); // go to e-o-l
3504 //**** fall through to ... 'a'
3505 case 'a': // a- append after current char
3510 case 'B': // B- back a blank-delimited Word
3511 case 'E': // E- end of a blank-delimited word
3512 case 'W': // W- forward a blank-delimited word
3519 if (c == 'W' || isspace(dot[dir])) {
3520 dot = skip_thing(dot, 1, dir, S_TO_WS);
3521 dot = skip_thing(dot, 2, dir, S_OVER_WS);
3524 dot = skip_thing(dot, 1, dir, S_BEFORE_WS);
3526 case 'C': // C- Change to e-o-l
3527 case 'D': // D- delete to e-o-l
3529 dot = dollar_line(dot); // move to before NL
3530 // copy text into a register and delete
3531 dot = yank_delete(save_dot, dot, 0, YANKDEL); // delete to e-o-l
3533 goto dc_i; // start inserting
3534 #if ENABLE_FEATURE_VI_DOT_CMD
3536 end_cmd_q(); // stop adding to q
3539 case 'g': // 'gg' goto a line number (from vim)
3540 // (default to first line in file)
3541 c1 = get_one_char();
3546 not_implemented(buf);
3552 case 'G': // G- goto to a line number (default= E-O-F)
3553 dot = end - 1; // assume E-O-F
3555 dot = find_line(cmdcnt); // what line is #cmdcnt
3559 case 'H': // H- goto top line on screen
3561 if (cmdcnt > (rows - 1)) {
3562 cmdcnt = (rows - 1);
3569 case 'I': // I- insert before first non-blank
3572 //**** fall through to ... 'i'
3573 case 'i': // i- insert before current char
3574 case VI_K_INSERT: // Cursor Key Insert
3576 cmd_mode = 1; // start insrting
3578 case 'J': // J- join current and next lines together
3582 dot_end(); // move to NL
3583 if (dot < end - 1) { // make sure not last char in text[]
3584 *dot++ = ' '; // replace NL with space
3586 while (isblank(*dot)) { // delete leading WS
3590 end_cmd_q(); // stop adding to q
3592 case 'L': // L- goto bottom line on screen
3594 if (cmdcnt > (rows - 1)) {
3595 cmdcnt = (rows - 1);
3603 case 'M': // M- goto middle line on screen
3605 for (cnt = 0; cnt < (rows-1) / 2; cnt++)
3606 dot = next_line(dot);
3608 case 'O': // O- open a empty line above
3610 p = begin_line(dot);
3611 if (p[-1] == '\n') {
3613 case 'o': // o- open a empty line below; Yes, I know it is in the middle of the "if (..."
3615 dot = char_insert(dot, '\n');
3618 dot = char_insert(dot, '\n'); // i\n ESC
3623 case 'R': // R- continuous Replace char
3630 case 'X': // X- delete char before dot
3631 case 'x': // x- delete the current char
3632 case 's': // s- substitute the current char
3639 if (dot[dir] != '\n') {
3641 dot--; // delete prev char
3642 dot = yank_delete(dot, dot, 0, YANKDEL); // delete char
3645 goto dc_i; // start insrting
3646 end_cmd_q(); // stop adding to q
3648 case 'Z': // Z- if modified, {write}; exit
3649 // ZZ means to save file (if necessary), then exit
3650 c1 = get_one_char();
3655 if (file_modified) {
3656 if (ENABLE_FEATURE_VI_READONLY && readonly_mode) {
3657 status_line_bold("\"%s\" File is read only", current_filename);
3660 cnt = file_write(current_filename, text, end - 1);
3663 status_line_bold("Write error: %s", strerror(errno));
3664 } else if (cnt == (end - 1 - text + 1)) {
3671 case '^': // ^- move to first non-blank on line
3675 case 'b': // b- back a word
3676 case 'e': // e- end of word
3683 if ((dot + dir) < text || (dot + dir) > end - 1)
3686 if (isspace(*dot)) {
3687 dot = skip_thing(dot, (c == 'e') ? 2 : 1, dir, S_OVER_WS);
3689 if (isalnum(*dot) || *dot == '_') {
3690 dot = skip_thing(dot, 1, dir, S_END_ALNUM);
3691 } else if (ispunct(*dot)) {
3692 dot = skip_thing(dot, 1, dir, S_END_PUNCT);
3695 case 'c': // c- change something
3696 case 'd': // d- delete something
3697 #if ENABLE_FEATURE_VI_YANKMARK
3698 case 'y': // y- yank something
3699 case 'Y': // Y- Yank a line
3702 int yf, ml, whole = 0;
3703 yf = YANKDEL; // assume either "c" or "d"
3704 #if ENABLE_FEATURE_VI_YANKMARK
3705 if (c == 'y' || c == 'Y')
3710 c1 = get_one_char(); // get the type of thing to delete
3711 // determine range, and whether it spans lines
3712 ml = find_range(&p, &q, c1);
3713 if (c1 == 27) { // ESC- user changed mind and wants out
3714 c = c1 = 27; // Escape- do nothing
3715 } else if (strchr("wW", c1)) {
3717 // don't include trailing WS as part of word
3718 while (isblank(*q)) {
3719 if (q <= text || q[-1] == '\n')
3724 dot = yank_delete(p, q, ml, yf); // delete word
3725 } else if (strchr("^0bBeEft%$ lh\b\177", c1)) {
3726 // partial line copy text into a register and delete
3727 dot = yank_delete(p, q, ml, yf); // delete word
3728 } else if (strchr("cdykjHL+-{}\r\n", c1)) {
3729 // whole line copy text into a register and delete
3730 dot = yank_delete(p, q, ml, yf); // delete lines
3733 // could not recognize object
3734 c = c1 = 27; // error-
3740 dot = char_insert(dot, '\n');
3741 // on the last line of file don't move to prev line
3742 if (whole && dot != (end-1)) {
3745 } else if (c == 'd') {
3751 // if CHANGING, not deleting, start inserting after the delete
3753 strcpy(buf, "Change");
3754 goto dc_i; // start inserting
3757 strcpy(buf, "Delete");
3759 #if ENABLE_FEATURE_VI_YANKMARK
3760 if (c == 'y' || c == 'Y') {
3761 strcpy(buf, "Yank");
3765 for (cnt = 0; p <= q; p++) {
3769 status_line("%s %d lines (%d chars) using [%c]",
3770 buf, cnt, strlen(reg[YDreg]), what_reg());
3772 end_cmd_q(); // stop adding to q
3776 case 'k': // k- goto prev line, same col
3777 case VI_K_UP: // cursor key Up
3782 dot = move_to_col(dot, ccol + offset); // try stay in same col
3784 case 'r': // r- replace the current char with user input
3785 c1 = get_one_char(); // get the replacement char
3790 end_cmd_q(); // stop adding to q
3792 case 't': // t- move to char prior to next x
3793 last_forward_char = get_one_char();
3795 if (*dot == last_forward_char)
3797 last_forward_char= 0;
3799 case 'w': // w- forward a word
3803 if (isalnum(*dot) || *dot == '_') { // we are on ALNUM
3804 dot = skip_thing(dot, 1, FORWARD, S_END_ALNUM);
3805 } else if (ispunct(*dot)) { // we are on PUNCT
3806 dot = skip_thing(dot, 1, FORWARD, S_END_PUNCT);
3809 dot++; // move over word
3810 if (isspace(*dot)) {
3811 dot = skip_thing(dot, 2, FORWARD, S_OVER_WS);
3815 c1 = get_one_char(); // get the replacement char
3818 cnt = (rows - 2) / 2; // put dot at center
3820 cnt = rows - 2; // put dot at bottom
3821 screenbegin = begin_line(dot); // start dot at top
3822 dot_scroll(cnt, -1);
3824 case '|': // |- move to column "cmdcnt"
3825 dot = move_to_col(dot, cmdcnt - 1); // try to move to column
3827 case '~': // ~- flip the case of letters a-z -> A-Z
3831 if (islower(*dot)) {
3832 *dot = toupper(*dot);
3834 } else if (isupper(*dot)) {
3835 *dot = tolower(*dot);
3839 end_cmd_q(); // stop adding to q
3841 //----- The Cursor and Function Keys -----------------------------
3842 case VI_K_HOME: // Cursor Key Home
3845 // The Fn keys could point to do_macro which could translate them
3846 case VI_K_FUN1: // Function Key F1
3847 case VI_K_FUN2: // Function Key F2
3848 case VI_K_FUN3: // Function Key F3
3849 case VI_K_FUN4: // Function Key F4
3850 case VI_K_FUN5: // Function Key F5
3851 case VI_K_FUN6: // Function Key F6
3852 case VI_K_FUN7: // Function Key F7
3853 case VI_K_FUN8: // Function Key F8
3854 case VI_K_FUN9: // Function Key F9
3855 case VI_K_FUN10: // Function Key F10
3856 case VI_K_FUN11: // Function Key F11
3857 case VI_K_FUN12: // Function Key F12
3862 // if text[] just became empty, add back an empty line
3864 char_insert(text, '\n'); // start empty buf with dummy line
3867 // it is OK for dot to exactly equal to end, otherwise check dot validity
3869 dot = bound_dot(dot); // make sure "dot" is valid
3871 #if ENABLE_FEATURE_VI_YANKMARK
3872 check_context(c); // update the current context
3876 cmdcnt = 0; // cmd was not a number, reset cmdcnt
3877 cnt = dot - begin_line(dot);
3878 // Try to stay off of the Newline
3879 if (*dot == '\n' && cnt > 0 && cmd_mode == 0)
3883 /* NB! the CRASHME code is unmaintained, and doesn't currently build */
3884 #if ENABLE_FEATURE_VI_CRASHME
3885 static int totalcmds = 0;
3886 static int Mp = 85; // Movement command Probability
3887 static int Np = 90; // Non-movement command Probability
3888 static int Dp = 96; // Delete command Probability
3889 static int Ip = 97; // Insert command Probability
3890 static int Yp = 98; // Yank command Probability
3891 static int Pp = 99; // Put command Probability
3892 static int M = 0, N = 0, I = 0, D = 0, Y = 0, P = 0, U = 0;
3893 static const char chars[20] = "\t012345 abcdABCD-=.$";
3894 static const char *const words[20] = {
3895 "this", "is", "a", "test",
3896 "broadcast", "the", "emergency", "of",
3897 "system", "quick", "brown", "fox",
3898 "jumped", "over", "lazy", "dogs",
3899 "back", "January", "Febuary", "March"
3901 static const char *const lines[20] = {
3902 "You should have received a copy of the GNU General Public License\n",
3903 "char c, cm, *cmd, *cmd1;\n",
3904 "generate a command by percentages\n",
3905 "Numbers may be typed as a prefix to some commands.\n",
3906 "Quit, discarding changes!\n",
3907 "Forced write, if permission originally not valid.\n",
3908 "In general, any ex or ed command (such as substitute or delete).\n",
3909 "I have tickets available for the Blazers vs LA Clippers for Monday, Janurary 1 at 1:00pm.\n",
3910 "Please get w/ me and I will go over it with you.\n",
3911 "The following is a list of scheduled, committed changes.\n",
3912 "1. Launch Norton Antivirus (Start, Programs, Norton Antivirus)\n",
3913 "Reminder....Town Meeting in Central Perk cafe today at 3:00pm.\n",
3914 "Any question about transactions please contact Sterling Huxley.\n",
3915 "I will try to get back to you by Friday, December 31.\n",
3916 "This Change will be implemented on Friday.\n",
3917 "Let me know if you have problems accessing this;\n",
3918 "Sterling Huxley recently added you to the access list.\n",
3919 "Would you like to go to lunch?\n",
3920 "The last command will be automatically run.\n",
3921 "This is too much english for a computer geek.\n",
3923 static char *multilines[20] = {
3924 "You should have received a copy of the GNU General Public License\n",
3925 "char c, cm, *cmd, *cmd1;\n",
3926 "generate a command by percentages\n",
3927 "Numbers may be typed as a prefix to some commands.\n",
3928 "Quit, discarding changes!\n",
3929 "Forced write, if permission originally not valid.\n",
3930 "In general, any ex or ed command (such as substitute or delete).\n",
3931 "I have tickets available for the Blazers vs LA Clippers for Monday, Janurary 1 at 1:00pm.\n",
3932 "Please get w/ me and I will go over it with you.\n",
3933 "The following is a list of scheduled, committed changes.\n",
3934 "1. Launch Norton Antivirus (Start, Programs, Norton Antivirus)\n",
3935 "Reminder....Town Meeting in Central Perk cafe today at 3:00pm.\n",
3936 "Any question about transactions please contact Sterling Huxley.\n",
3937 "I will try to get back to you by Friday, December 31.\n",
3938 "This Change will be implemented on Friday.\n",
3939 "Let me know if you have problems accessing this;\n",
3940 "Sterling Huxley recently added you to the access list.\n",
3941 "Would you like to go to lunch?\n",
3942 "The last command will be automatically run.\n",
3943 "This is too much english for a computer geek.\n",
3946 // create a random command to execute
3947 static void crash_dummy()
3949 static int sleeptime; // how long to pause between commands
3950 char c, cm, *cmd, *cmd1;
3951 int i, cnt, thing, rbi, startrbi, percent;
3953 // "dot" movement commands
3954 cmd1 = " \n\r\002\004\005\006\025\0310^$-+wWeEbBhjklHL";
3956 // is there already a command running?
3957 if (chars_to_parse > 0)
3961 sleeptime = 0; // how long to pause between commands
3962 memset(readbuffer, '\0', sizeof(readbuffer));
3963 // generate a command by percentages
3964 percent = (int) lrand48() % 100; // get a number from 0-99
3965 if (percent < Mp) { // Movement commands
3966 // available commands
3969 } else if (percent < Np) { // non-movement commands
3970 cmd = "mz<>\'\""; // available commands
3972 } else if (percent < Dp) { // Delete commands
3973 cmd = "dx"; // available commands
3975 } else if (percent < Ip) { // Inset commands
3976 cmd = "iIaAsrJ"; // available commands
3978 } else if (percent < Yp) { // Yank commands
3979 cmd = "yY"; // available commands
3981 } else if (percent < Pp) { // Put commands
3982 cmd = "pP"; // available commands
3985 // We do not know how to handle this command, try again
3989 // randomly pick one of the available cmds from "cmd[]"
3990 i = (int) lrand48() % strlen(cmd);
3992 if (strchr(":\024", cm))
3993 goto cd0; // dont allow colon or ctrl-T commands
3994 readbuffer[rbi++] = cm; // put cmd into input buffer
3996 // now we have the command-
3997 // there are 1, 2, and multi char commands
3998 // find out which and generate the rest of command as necessary
3999 if (strchr("dmryz<>\'\"", cm)) { // 2-char commands
4000 cmd1 = " \n\r0$^-+wWeEbBhjklHL";
4001 if (cm == 'm' || cm == '\'' || cm == '\"') { // pick a reg[]
4002 cmd1 = "abcdefghijklmnopqrstuvwxyz";
4004 thing = (int) lrand48() % strlen(cmd1); // pick a movement command
4006 readbuffer[rbi++] = c; // add movement to input buffer
4008 if (strchr("iIaAsc", cm)) { // multi-char commands
4010 // change some thing
4011 thing = (int) lrand48() % strlen(cmd1); // pick a movement command
4013 readbuffer[rbi++] = c; // add movement to input buffer
4015 thing = (int) lrand48() % 4; // what thing to insert
4016 cnt = (int) lrand48() % 10; // how many to insert
4017 for (i = 0; i < cnt; i++) {
4018 if (thing == 0) { // insert chars
4019 readbuffer[rbi++] = chars[((int) lrand48() % strlen(chars))];
4020 } else if (thing == 1) { // insert words
4021 strcat(readbuffer, words[(int) lrand48() % 20]);
4022 strcat(readbuffer, " ");
4023 sleeptime = 0; // how fast to type
4024 } else if (thing == 2) { // insert lines
4025 strcat(readbuffer, lines[(int) lrand48() % 20]);
4026 sleeptime = 0; // how fast to type
4027 } else { // insert multi-lines
4028 strcat(readbuffer, multilines[(int) lrand48() % 20]);
4029 sleeptime = 0; // how fast to type
4032 strcat(readbuffer, "\033");
4034 chars_to_parse = strlen(readbuffer);
4038 mysleep(sleeptime); // sleep 1/100 sec
4041 // test to see if there are any errors
4042 static void crash_test()
4044 static time_t oldtim;
4051 strcat(msg, "end<text ");
4053 if (end > textend) {
4054 strcat(msg, "end>textend ");
4057 strcat(msg, "dot<text ");
4060 strcat(msg, "dot>end ");
4062 if (screenbegin < text) {
4063 strcat(msg, "screenbegin<text ");
4065 if (screenbegin > end - 1) {
4066 strcat(msg, "screenbegin>end-1 ");
4070 printf("\n\n%d: \'%c\' %s\n\n\n%s[Hit return to continue]%s",
4071 totalcmds, last_input_char, msg, SOs, SOn);
4073 while (safe_read(STDIN_FILENO, d, 1) > 0) {
4074 if (d[0] == '\n' || d[0] == '\r')
4079 if (tim >= (oldtim + 3)) {
4080 sprintf(status_buffer,
4081 "Tot=%d: M=%d N=%d I=%d D=%d Y=%d P=%d U=%d size=%d",
4082 totalcmds, M, N, I, D, Y, P, U, end - text + 1);