Contents of /trunk/mkinitrd-magellan/busybox/editors/vi.c
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Sat Sep 1 22:45:15 2007 UTC (17 years ago) by niro
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Sat Sep 1 22:45:15 2007 UTC (17 years ago) by niro
File MIME type: text/plain
File size: 108803 byte(s)
-import if magellan mkinitrd; it is a fork of redhats mkinitrd-5.0.8 with all magellan patches and features; deprecates magellan-src/mkinitrd
1 | /* vi: set sw=4 ts=4: */ |
2 | /* |
3 | * tiny vi.c: A small 'vi' clone |
4 | * Copyright (C) 2000, 2001 Sterling Huxley <sterling@europa.com> |
5 | * |
6 | * Licensed under the GPL v2 or later, see the file LICENSE in this tarball. |
7 | */ |
8 | |
9 | /* |
10 | * Things To Do: |
11 | * EXINIT |
12 | * $HOME/.exrc and ./.exrc |
13 | * add magic to search /foo.*bar |
14 | * add :help command |
15 | * :map macros |
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" |
22 | */ |
23 | |
24 | #include "busybox.h" |
25 | |
26 | #define ENABLE_FEATURE_VI_CRASHME 0 |
27 | |
28 | #if ENABLE_LOCALE_SUPPORT |
29 | #define Isprint(c) isprint((c)) |
30 | #else |
31 | #define Isprint(c) ( (c) >= ' ' && (c) != 127 && (c) != ((unsigned char)'\233') ) |
32 | #endif |
33 | |
34 | #define MAX_SCR_COLS BUFSIZ |
35 | |
36 | // Misc. non-Ascii keys that report an escape sequence |
37 | #define VI_K_UP 128 // cursor key Up |
38 | #define VI_K_DOWN 129 // cursor key Down |
39 | #define VI_K_RIGHT 130 // Cursor Key Right |
40 | #define VI_K_LEFT 131 // cursor key Left |
41 | #define VI_K_HOME 132 // Cursor Key Home |
42 | #define VI_K_END 133 // Cursor Key End |
43 | #define VI_K_INSERT 134 // Cursor Key Insert |
44 | #define VI_K_PAGEUP 135 // Cursor Key Page Up |
45 | #define VI_K_PAGEDOWN 136 // Cursor Key Page Down |
46 | #define VI_K_FUN1 137 // Function Key F1 |
47 | #define VI_K_FUN2 138 // Function Key F2 |
48 | #define VI_K_FUN3 139 // Function Key F3 |
49 | #define VI_K_FUN4 140 // Function Key F4 |
50 | #define VI_K_FUN5 141 // Function Key F5 |
51 | #define VI_K_FUN6 142 // Function Key F6 |
52 | #define VI_K_FUN7 143 // Function Key F7 |
53 | #define VI_K_FUN8 144 // Function Key F8 |
54 | #define VI_K_FUN9 145 // Function Key F9 |
55 | #define VI_K_FUN10 146 // Function Key F10 |
56 | #define VI_K_FUN11 147 // Function Key F11 |
57 | #define VI_K_FUN12 148 // Function Key F12 |
58 | |
59 | /* vt102 typical ESC sequence */ |
60 | /* terminal standout start/normal ESC sequence */ |
61 | static const char SOs[] = "\033[7m"; |
62 | static const char SOn[] = "\033[0m"; |
63 | /* terminal bell sequence */ |
64 | static const char bell[] = "\007"; |
65 | /* Clear-end-of-line and Clear-end-of-screen ESC sequence */ |
66 | static const char Ceol[] = "\033[0K"; |
67 | static const char Ceos [] = "\033[0J"; |
68 | /* Cursor motion arbitrary destination ESC sequence */ |
69 | static const char CMrc[] = "\033[%d;%dH"; |
70 | /* Cursor motion up and down ESC sequence */ |
71 | static const char CMup[] = "\033[A"; |
72 | static const char CMdown[] = "\n"; |
73 | |
74 | |
75 | enum { |
76 | YANKONLY = FALSE, |
77 | YANKDEL = TRUE, |
78 | FORWARD = 1, // code depends on "1" for array index |
79 | BACK = -1, // code depends on "-1" for array index |
80 | LIMITED = 0, // how much of text[] in char_search |
81 | FULL = 1, // how much of text[] in char_search |
82 | |
83 | S_BEFORE_WS = 1, // used in skip_thing() for moving "dot" |
84 | S_TO_WS = 2, // used in skip_thing() for moving "dot" |
85 | S_OVER_WS = 3, // used in skip_thing() for moving "dot" |
86 | S_END_PUNCT = 4, // used in skip_thing() for moving "dot" |
87 | S_END_ALNUM = 5 // used in skip_thing() for moving "dot" |
88 | }; |
89 | |
90 | typedef unsigned char Byte; |
91 | |
92 | static int vi_setops; |
93 | #define VI_AUTOINDENT 1 |
94 | #define VI_SHOWMATCH 2 |
95 | #define VI_IGNORECASE 4 |
96 | #define VI_ERR_METHOD 8 |
97 | #define autoindent (vi_setops & VI_AUTOINDENT) |
98 | #define showmatch (vi_setops & VI_SHOWMATCH ) |
99 | #define ignorecase (vi_setops & VI_IGNORECASE) |
100 | /* indicate error with beep or flash */ |
101 | #define err_method (vi_setops & VI_ERR_METHOD) |
102 | |
103 | |
104 | static int editing; // >0 while we are editing a file |
105 | static int cmd_mode; // 0=command 1=insert 2=replace |
106 | static int file_modified; // buffer contents changed |
107 | static int last_file_modified = -1; |
108 | static int fn_start; // index of first cmd line file name |
109 | static int save_argc; // how many file names on cmd line |
110 | static int cmdcnt; // repetition count |
111 | static fd_set rfds; // use select() for small sleeps |
112 | static struct timeval tv; // use select() for small sleeps |
113 | static int rows, columns; // the terminal screen is this size |
114 | static int crow, ccol, offset; // cursor is on Crow x Ccol with Horz Ofset |
115 | static Byte *status_buffer; // mesages to the user |
116 | #define STATUS_BUFFER_LEN 200 |
117 | static int have_status_msg; // is default edit status needed? |
118 | static int last_status_cksum; // hash of current status line |
119 | static Byte *cfn; // previous, current, and next file name |
120 | static Byte *text, *end; // pointers to the user data in memory |
121 | static Byte *screen; // pointer to the virtual screen buffer |
122 | static int screensize; // and its size |
123 | static Byte *screenbegin; // index into text[], of top line on the screen |
124 | static Byte *dot; // where all the action takes place |
125 | static int tabstop; |
126 | static struct termios term_orig, term_vi; // remember what the cooked mode was |
127 | static Byte erase_char; // the users erase character |
128 | static Byte last_input_char; // last char read from user |
129 | static Byte last_forward_char; // last char searched for with 'f' |
130 | |
131 | #if ENABLE_FEATURE_VI_OPTIMIZE_CURSOR |
132 | static int last_row; // where the cursor was last moved to |
133 | #endif |
134 | #if ENABLE_FEATURE_VI_USE_SIGNALS |
135 | static jmp_buf restart; // catch_sig() |
136 | #endif |
137 | #if ENABLE_FEATURE_VI_USE_SIGNALS || ENABLE_FEATURE_VI_CRASHME |
138 | static int my_pid; |
139 | #endif |
140 | #if ENABLE_FEATURE_VI_DOT_CMD |
141 | static int adding2q; // are we currently adding user input to q |
142 | static Byte *last_modifying_cmd; // last modifying cmd for "." |
143 | static Byte *ioq, *ioq_start; // pointer to string for get_one_char to "read" |
144 | #endif |
145 | #if ENABLE_FEATURE_VI_DOT_CMD || ENABLE_FEATURE_VI_YANKMARK |
146 | static Byte *modifying_cmds; // cmds that modify text[] |
147 | #endif |
148 | #if ENABLE_FEATURE_VI_READONLY |
149 | static int vi_readonly, readonly; |
150 | #endif |
151 | #if ENABLE_FEATURE_VI_YANKMARK |
152 | static Byte *reg[28]; // named register a-z, "D", and "U" 0-25,26,27 |
153 | static int YDreg, Ureg; // default delete register and orig line for "U" |
154 | static Byte *mark[28]; // user marks points somewhere in text[]- a-z and previous context '' |
155 | static Byte *context_start, *context_end; |
156 | #endif |
157 | #if ENABLE_FEATURE_VI_SEARCH |
158 | static Byte *last_search_pattern; // last pattern from a '/' or '?' search |
159 | #endif |
160 | |
161 | |
162 | static void edit_file(Byte *); // edit one file |
163 | static void do_cmd(Byte); // execute a command |
164 | static void sync_cursor(Byte *, int *, int *); // synchronize the screen cursor to dot |
165 | static Byte *begin_line(Byte *); // return pointer to cur line B-o-l |
166 | static Byte *end_line(Byte *); // return pointer to cur line E-o-l |
167 | static Byte *prev_line(Byte *); // return pointer to prev line B-o-l |
168 | static Byte *next_line(Byte *); // return pointer to next line B-o-l |
169 | static Byte *end_screen(void); // get pointer to last char on screen |
170 | static int count_lines(Byte *, Byte *); // count line from start to stop |
171 | static Byte *find_line(int); // find begining of line #li |
172 | static Byte *move_to_col(Byte *, int); // move "p" to column l |
173 | static int isblnk(Byte); // is the char a blank or tab |
174 | static void dot_left(void); // move dot left- dont leave line |
175 | static void dot_right(void); // move dot right- dont leave line |
176 | static void dot_begin(void); // move dot to B-o-l |
177 | static void dot_end(void); // move dot to E-o-l |
178 | static void dot_next(void); // move dot to next line B-o-l |
179 | static void dot_prev(void); // move dot to prev line B-o-l |
180 | static void dot_scroll(int, int); // move the screen up or down |
181 | static void dot_skip_over_ws(void); // move dot pat WS |
182 | static void dot_delete(void); // delete the char at 'dot' |
183 | static Byte *bound_dot(Byte *); // make sure text[0] <= P < "end" |
184 | static Byte *new_screen(int, int); // malloc virtual screen memory |
185 | static Byte *new_text(int); // malloc memory for text[] buffer |
186 | static Byte *char_insert(Byte *, Byte); // insert the char c at 'p' |
187 | static Byte *stupid_insert(Byte *, Byte); // stupidly insert the char c at 'p' |
188 | static Byte find_range(Byte **, Byte **, Byte); // return pointers for an object |
189 | static int st_test(Byte *, int, int, Byte *); // helper for skip_thing() |
190 | static Byte *skip_thing(Byte *, int, int, int); // skip some object |
191 | static Byte *find_pair(Byte *, Byte); // find matching pair () [] {} |
192 | static Byte *text_hole_delete(Byte *, Byte *); // at "p", delete a 'size' byte hole |
193 | static Byte *text_hole_make(Byte *, int); // at "p", make a 'size' byte hole |
194 | static Byte *yank_delete(Byte *, Byte *, int, int); // yank text[] into register then delete |
195 | static void show_help(void); // display some help info |
196 | static void rawmode(void); // set "raw" mode on tty |
197 | static void cookmode(void); // return to "cooked" mode on tty |
198 | static int mysleep(int); // sleep for 'h' 1/100 seconds |
199 | static Byte readit(void); // read (maybe cursor) key from stdin |
200 | static Byte get_one_char(void); // read 1 char from stdin |
201 | static int file_size(const Byte *); // what is the byte size of "fn" |
202 | static int file_insert(Byte *, Byte *, int); |
203 | static int file_write(Byte *, Byte *, Byte *); |
204 | static void place_cursor(int, int, int); |
205 | static void screen_erase(void); |
206 | static void clear_to_eol(void); |
207 | static void clear_to_eos(void); |
208 | static void standout_start(void); // send "start reverse video" sequence |
209 | static void standout_end(void); // send "end reverse video" sequence |
210 | static void flash(int); // flash the terminal screen |
211 | static void show_status_line(void); // put a message on the bottom line |
212 | static void psb(const char *, ...); // Print Status Buf |
213 | static void psbs(const char *, ...); // Print Status Buf in standout mode |
214 | static void ni(Byte *); // display messages |
215 | static int format_edit_status(void); // format file status on status line |
216 | static void redraw(int); // force a full screen refresh |
217 | static void format_line(Byte*, Byte*, int); |
218 | static void refresh(int); // update the terminal from screen[] |
219 | |
220 | static void Indicate_Error(void); // use flash or beep to indicate error |
221 | #define indicate_error(c) Indicate_Error() |
222 | static void Hit_Return(void); |
223 | |
224 | #if ENABLE_FEATURE_VI_SEARCH |
225 | static Byte *char_search(Byte *, Byte *, int, int); // search for pattern starting at p |
226 | static int mycmp(Byte *, Byte *, int); // string cmp based in "ignorecase" |
227 | #endif |
228 | #if ENABLE_FEATURE_VI_COLON |
229 | static Byte *get_one_address(Byte *, int *); // get colon addr, if present |
230 | static Byte *get_address(Byte *, int *, int *); // get two colon addrs, if present |
231 | static void colon(Byte *); // execute the "colon" mode cmds |
232 | #endif |
233 | #if ENABLE_FEATURE_VI_USE_SIGNALS |
234 | static void winch_sig(int); // catch window size changes |
235 | static void suspend_sig(int); // catch ctrl-Z |
236 | static void catch_sig(int); // catch ctrl-C and alarm time-outs |
237 | #endif |
238 | #if ENABLE_FEATURE_VI_DOT_CMD |
239 | static void start_new_cmd_q(Byte); // new queue for command |
240 | static void end_cmd_q(void); // stop saving input chars |
241 | #else |
242 | #define end_cmd_q() ((void)0) |
243 | #endif |
244 | #if ENABLE_FEATURE_VI_SETOPTS |
245 | static void showmatching(Byte *); // show the matching pair () [] {} |
246 | #endif |
247 | #if ENABLE_FEATURE_VI_YANKMARK || (ENABLE_FEATURE_VI_COLON && ENABLE_FEATURE_VI_SEARCH) || ENABLE_FEATURE_VI_CRASHME |
248 | static Byte *string_insert(Byte *, Byte *); // insert the string at 'p' |
249 | #endif |
250 | #if ENABLE_FEATURE_VI_YANKMARK |
251 | static Byte *text_yank(Byte *, Byte *, int); // save copy of "p" into a register |
252 | static Byte what_reg(void); // what is letter of current YDreg |
253 | static void check_context(Byte); // remember context for '' command |
254 | #endif |
255 | #if ENABLE_FEATURE_VI_CRASHME |
256 | static void crash_dummy(); |
257 | static void crash_test(); |
258 | static int crashme = 0; |
259 | #endif |
260 | |
261 | |
262 | static void write1(const char *out) |
263 | { |
264 | fputs(out, stdout); |
265 | } |
266 | |
267 | int vi_main(int argc, char **argv) |
268 | { |
269 | int c; |
270 | RESERVE_CONFIG_BUFFER(STATUS_BUFFER, STATUS_BUFFER_LEN); |
271 | |
272 | #if ENABLE_FEATURE_VI_YANKMARK |
273 | int i; |
274 | #endif |
275 | #if defined(CONFIG_FEATURE_VI_USE_SIGNALS) || defined(CONFIG_FEATURE_VI_CRASHME) |
276 | my_pid = getpid(); |
277 | #endif |
278 | #if ENABLE_FEATURE_VI_CRASHME |
279 | (void) srand((long) my_pid); |
280 | #endif |
281 | |
282 | status_buffer = (Byte *)STATUS_BUFFER; |
283 | last_status_cksum = 0; |
284 | |
285 | #if ENABLE_FEATURE_VI_READONLY |
286 | vi_readonly = readonly = FALSE; |
287 | if (strncmp(argv[0], "view", 4) == 0) { |
288 | readonly = TRUE; |
289 | vi_readonly = TRUE; |
290 | } |
291 | #endif |
292 | vi_setops = VI_AUTOINDENT | VI_SHOWMATCH | VI_IGNORECASE | VI_ERR_METHOD; |
293 | #if ENABLE_FEATURE_VI_YANKMARK |
294 | for (i = 0; i < 28; i++) { |
295 | reg[i] = 0; |
296 | } // init the yank regs |
297 | #endif |
298 | #if ENABLE_FEATURE_VI_DOT_CMD || ENABLE_FEATURE_VI_YANKMARK |
299 | modifying_cmds = (Byte *) "aAcCdDiIJoOpPrRsxX<>~"; // cmds modifying text[] |
300 | #endif |
301 | |
302 | // 1- process $HOME/.exrc file |
303 | // 2- process EXINIT variable from environment |
304 | // 3- process command line args |
305 | while ((c = getopt(argc, argv, "hCR")) != -1) { |
306 | switch (c) { |
307 | #if ENABLE_FEATURE_VI_CRASHME |
308 | case 'C': |
309 | crashme = 1; |
310 | break; |
311 | #endif |
312 | #if ENABLE_FEATURE_VI_READONLY |
313 | case 'R': // Read-only flag |
314 | readonly = TRUE; |
315 | vi_readonly = TRUE; |
316 | break; |
317 | #endif |
318 | //case 'r': // recover flag- ignore- we don't use tmp file |
319 | //case 'x': // encryption flag- ignore |
320 | //case 'c': // execute command first |
321 | //case 'h': // help -- just use default |
322 | default: |
323 | show_help(); |
324 | return 1; |
325 | } |
326 | } |
327 | |
328 | // The argv array can be used by the ":next" and ":rewind" commands |
329 | // save optind. |
330 | fn_start = optind; // remember first file name for :next and :rew |
331 | save_argc = argc; |
332 | |
333 | //----- This is the main file handling loop -------------- |
334 | if (optind >= argc) { |
335 | editing = 1; // 0= exit, 1= one file, 2= multiple files |
336 | edit_file(0); |
337 | } else { |
338 | for (; optind < argc; optind++) { |
339 | editing = 1; // 0=exit, 1=one file, 2+ =many files |
340 | free(cfn); |
341 | cfn = (Byte *) xstrdup(argv[optind]); |
342 | edit_file(cfn); |
343 | } |
344 | } |
345 | //----------------------------------------------------------- |
346 | |
347 | return 0; |
348 | } |
349 | |
350 | static void edit_file(Byte * fn) |
351 | { |
352 | Byte c; |
353 | int cnt, size, ch; |
354 | |
355 | #if ENABLE_FEATURE_VI_USE_SIGNALS |
356 | int sig; |
357 | #endif |
358 | #if ENABLE_FEATURE_VI_YANKMARK |
359 | static Byte *cur_line; |
360 | #endif |
361 | |
362 | rawmode(); |
363 | rows = 24; |
364 | columns = 80; |
365 | ch= -1; |
366 | if (ENABLE_FEATURE_VI_WIN_RESIZE) |
367 | get_terminal_width_height(0, &columns, &rows); |
368 | new_screen(rows, columns); // get memory for virtual screen |
369 | |
370 | cnt = file_size(fn); // file size |
371 | size = 2 * cnt; // 200% of file size |
372 | new_text(size); // get a text[] buffer |
373 | screenbegin = dot = end = text; |
374 | if (fn != 0) { |
375 | ch= file_insert(fn, text, cnt); |
376 | } |
377 | if (ch < 1) { |
378 | (void) char_insert(text, '\n'); // start empty buf with dummy line |
379 | } |
380 | file_modified = 0; |
381 | last_file_modified = -1; |
382 | #if ENABLE_FEATURE_VI_YANKMARK |
383 | YDreg = 26; // default Yank/Delete reg |
384 | Ureg = 27; // hold orig line for "U" cmd |
385 | for (cnt = 0; cnt < 28; cnt++) { |
386 | mark[cnt] = 0; |
387 | } // init the marks |
388 | mark[26] = mark[27] = text; // init "previous context" |
389 | #endif |
390 | |
391 | last_forward_char = last_input_char = '\0'; |
392 | crow = 0; |
393 | ccol = 0; |
394 | |
395 | #if ENABLE_FEATURE_VI_USE_SIGNALS |
396 | catch_sig(0); |
397 | signal(SIGWINCH, winch_sig); |
398 | signal(SIGTSTP, suspend_sig); |
399 | sig = setjmp(restart); |
400 | if (sig != 0) { |
401 | screenbegin = dot = text; |
402 | } |
403 | #endif |
404 | |
405 | editing = 1; |
406 | cmd_mode = 0; // 0=command 1=insert 2='R'eplace |
407 | cmdcnt = 0; |
408 | tabstop = 8; |
409 | offset = 0; // no horizontal offset |
410 | c = '\0'; |
411 | #if ENABLE_FEATURE_VI_DOT_CMD |
412 | free(last_modifying_cmd); |
413 | free(ioq_start); |
414 | ioq = ioq_start = last_modifying_cmd = 0; |
415 | adding2q = 0; |
416 | #endif |
417 | redraw(FALSE); // dont force every col re-draw |
418 | show_status_line(); |
419 | |
420 | //------This is the main Vi cmd handling loop ----------------------- |
421 | while (editing > 0) { |
422 | #if ENABLE_FEATURE_VI_CRASHME |
423 | if (crashme > 0) { |
424 | if ((end - text) > 1) { |
425 | crash_dummy(); // generate a random command |
426 | } else { |
427 | crashme = 0; |
428 | dot = |
429 | string_insert(text, (Byte *) "\n\n##### Ran out of text to work on. #####\n\n"); // insert the string |
430 | refresh(FALSE); |
431 | } |
432 | } |
433 | #endif |
434 | last_input_char = c = get_one_char(); // get a cmd from user |
435 | #if ENABLE_FEATURE_VI_YANKMARK |
436 | // save a copy of the current line- for the 'U" command |
437 | if (begin_line(dot) != cur_line) { |
438 | cur_line = begin_line(dot); |
439 | text_yank(begin_line(dot), end_line(dot), Ureg); |
440 | } |
441 | #endif |
442 | #if ENABLE_FEATURE_VI_DOT_CMD |
443 | // These are commands that change text[]. |
444 | // Remember the input for the "." command |
445 | if (!adding2q && ioq_start == 0 |
446 | && strchr((char *) modifying_cmds, c) != NULL) { |
447 | start_new_cmd_q(c); |
448 | } |
449 | #endif |
450 | do_cmd(c); // execute the user command |
451 | // |
452 | // poll to see if there is input already waiting. if we are |
453 | // not able to display output fast enough to keep up, skip |
454 | // the display update until we catch up with input. |
455 | if (mysleep(0) == 0) { |
456 | // no input pending- so update output |
457 | refresh(FALSE); |
458 | show_status_line(); |
459 | } |
460 | #if ENABLE_FEATURE_VI_CRASHME |
461 | if (crashme > 0) |
462 | crash_test(); // test editor variables |
463 | #endif |
464 | } |
465 | //------------------------------------------------------------------- |
466 | |
467 | place_cursor(rows, 0, FALSE); // go to bottom of screen |
468 | clear_to_eol(); // Erase to end of line |
469 | cookmode(); |
470 | } |
471 | |
472 | //----- The Colon commands ------------------------------------- |
473 | #if ENABLE_FEATURE_VI_COLON |
474 | static Byte *get_one_address(Byte * p, int *addr) // get colon addr, if present |
475 | { |
476 | int st; |
477 | Byte *q; |
478 | |
479 | #if ENABLE_FEATURE_VI_YANKMARK |
480 | Byte c; |
481 | #endif |
482 | #if ENABLE_FEATURE_VI_SEARCH |
483 | Byte *pat, buf[BUFSIZ]; |
484 | #endif |
485 | |
486 | *addr = -1; // assume no addr |
487 | if (*p == '.') { // the current line |
488 | p++; |
489 | q = begin_line(dot); |
490 | *addr = count_lines(text, q); |
491 | #if ENABLE_FEATURE_VI_YANKMARK |
492 | } else if (*p == '\'') { // is this a mark addr |
493 | p++; |
494 | c = tolower(*p); |
495 | p++; |
496 | if (c >= 'a' && c <= 'z') { |
497 | // we have a mark |
498 | c = c - 'a'; |
499 | q = mark[(int) c]; |
500 | if (q != NULL) { // is mark valid |
501 | *addr = count_lines(text, q); // count lines |
502 | } |
503 | } |
504 | #endif |
505 | #if ENABLE_FEATURE_VI_SEARCH |
506 | } else if (*p == '/') { // a search pattern |
507 | q = buf; |
508 | for (p++; *p; p++) { |
509 | if (*p == '/') |
510 | break; |
511 | *q++ = *p; |
512 | *q = '\0'; |
513 | } |
514 | pat = (Byte *) xstrdup((char *) buf); // save copy of pattern |
515 | if (*p == '/') |
516 | p++; |
517 | q = char_search(dot, pat, FORWARD, FULL); |
518 | if (q != NULL) { |
519 | *addr = count_lines(text, q); |
520 | } |
521 | free(pat); |
522 | #endif |
523 | } else if (*p == '$') { // the last line in file |
524 | p++; |
525 | q = begin_line(end - 1); |
526 | *addr = count_lines(text, q); |
527 | } else if (isdigit(*p)) { // specific line number |
528 | sscanf((char *) p, "%d%n", addr, &st); |
529 | p += st; |
530 | } else { // I don't reconise this |
531 | // unrecognised address- assume -1 |
532 | *addr = -1; |
533 | } |
534 | return p; |
535 | } |
536 | |
537 | static Byte *get_address(Byte *p, int *b, int *e) // get two colon addrs, if present |
538 | { |
539 | //----- get the address' i.e., 1,3 'a,'b ----- |
540 | // get FIRST addr, if present |
541 | while (isblnk(*p)) |
542 | p++; // skip over leading spaces |
543 | if (*p == '%') { // alias for 1,$ |
544 | p++; |
545 | *b = 1; |
546 | *e = count_lines(text, end-1); |
547 | goto ga0; |
548 | } |
549 | p = get_one_address(p, b); |
550 | while (isblnk(*p)) |
551 | p++; |
552 | if (*p == ',') { // is there a address separator |
553 | p++; |
554 | while (isblnk(*p)) |
555 | p++; |
556 | // get SECOND addr, if present |
557 | p = get_one_address(p, e); |
558 | } |
559 | ga0: |
560 | while (isblnk(*p)) |
561 | p++; // skip over trailing spaces |
562 | return p; |
563 | } |
564 | |
565 | #if ENABLE_FEATURE_VI_SET && ENABLE_FEATURE_VI_SETOPTS |
566 | static void setops(const Byte *args, const char *opname, int flg_no, |
567 | const char *short_opname, int opt) |
568 | { |
569 | const char *a = (char *) args + flg_no; |
570 | int l = strlen(opname) - 1; /* opname have + ' ' */ |
571 | |
572 | if (strncasecmp(a, opname, l) == 0 || |
573 | strncasecmp(a, short_opname, 2) == 0) { |
574 | if(flg_no) |
575 | vi_setops &= ~opt; |
576 | else |
577 | vi_setops |= opt; |
578 | } |
579 | } |
580 | #endif |
581 | |
582 | static void colon(Byte * buf) |
583 | { |
584 | Byte c, *orig_buf, *buf1, *q, *r; |
585 | Byte *fn, cmd[BUFSIZ], args[BUFSIZ]; |
586 | int i, l, li, ch, b, e; |
587 | int useforce = FALSE, forced = FALSE; |
588 | struct stat st_buf; |
589 | |
590 | // :3154 // if (-e line 3154) goto it else stay put |
591 | // :4,33w! foo // write a portion of buffer to file "foo" |
592 | // :w // write all of buffer to current file |
593 | // :q // quit |
594 | // :q! // quit- dont care about modified file |
595 | // :'a,'z!sort -u // filter block through sort |
596 | // :'f // goto mark "f" |
597 | // :'fl // list literal the mark "f" line |
598 | // :.r bar // read file "bar" into buffer before dot |
599 | // :/123/,/abc/d // delete lines from "123" line to "abc" line |
600 | // :/xyz/ // goto the "xyz" line |
601 | // :s/find/replace/ // substitute pattern "find" with "replace" |
602 | // :!<cmd> // run <cmd> then return |
603 | // |
604 | |
605 | if (strlen((char *) buf) <= 0) |
606 | goto vc1; |
607 | if (*buf == ':') |
608 | buf++; // move past the ':' |
609 | |
610 | li = ch = i = 0; |
611 | b = e = -1; |
612 | q = text; // assume 1,$ for the range |
613 | r = end - 1; |
614 | li = count_lines(text, end - 1); |
615 | fn = cfn; // default to current file |
616 | memset(cmd, '\0', BUFSIZ); // clear cmd[] |
617 | memset(args, '\0', BUFSIZ); // clear args[] |
618 | |
619 | // look for optional address(es) :. :1 :1,9 :'q,'a :% |
620 | buf = get_address(buf, &b, &e); |
621 | |
622 | // remember orig command line |
623 | orig_buf = buf; |
624 | |
625 | // get the COMMAND into cmd[] |
626 | buf1 = cmd; |
627 | while (*buf != '\0') { |
628 | if (isspace(*buf)) |
629 | break; |
630 | *buf1++ = *buf++; |
631 | } |
632 | // get any ARGuments |
633 | while (isblnk(*buf)) |
634 | buf++; |
635 | strcpy((char *) args, (char *) buf); |
636 | buf1 = (Byte*)last_char_is((char *)cmd, '!'); |
637 | if (buf1) { |
638 | useforce = TRUE; |
639 | *buf1 = '\0'; // get rid of ! |
640 | } |
641 | if (b >= 0) { |
642 | // if there is only one addr, then the addr |
643 | // is the line number of the single line the |
644 | // user wants. So, reset the end |
645 | // pointer to point at end of the "b" line |
646 | q = find_line(b); // what line is #b |
647 | r = end_line(q); |
648 | li = 1; |
649 | } |
650 | if (e >= 0) { |
651 | // we were given two addrs. change the |
652 | // end pointer to the addr given by user. |
653 | r = find_line(e); // what line is #e |
654 | r = end_line(r); |
655 | li = e - b + 1; |
656 | } |
657 | // ------------ now look for the command ------------ |
658 | i = strlen((char *) cmd); |
659 | if (i == 0) { // :123CR goto line #123 |
660 | if (b >= 0) { |
661 | dot = find_line(b); // what line is #b |
662 | dot_skip_over_ws(); |
663 | } |
664 | } |
665 | #if ENABLE_FEATURE_ALLOW_EXEC |
666 | else if (strncmp((char *) cmd, "!", 1) == 0) { // run a cmd |
667 | // :!ls run the <cmd> |
668 | (void) alarm(0); // wait for input- no alarms |
669 | place_cursor(rows - 1, 0, FALSE); // go to Status line |
670 | clear_to_eol(); // clear the line |
671 | cookmode(); |
672 | system((char*)(orig_buf+1)); // run the cmd |
673 | rawmode(); |
674 | Hit_Return(); // let user see results |
675 | (void) alarm(3); // done waiting for input |
676 | } |
677 | #endif |
678 | else if (strncmp((char *) cmd, "=", i) == 0) { // where is the address |
679 | if (b < 0) { // no addr given- use defaults |
680 | b = e = count_lines(text, dot); |
681 | } |
682 | psb("%d", b); |
683 | } else if (strncasecmp((char *) cmd, "delete", i) == 0) { // delete lines |
684 | if (b < 0) { // no addr given- use defaults |
685 | q = begin_line(dot); // assume .,. for the range |
686 | r = end_line(dot); |
687 | } |
688 | dot = yank_delete(q, r, 1, YANKDEL); // save, then delete lines |
689 | dot_skip_over_ws(); |
690 | } else if (strncasecmp((char *) cmd, "edit", i) == 0) { // Edit a file |
691 | int sr; |
692 | sr= 0; |
693 | // don't edit, if the current file has been modified |
694 | if (file_modified && ! useforce) { |
695 | psbs("No write since last change (:edit! overrides)"); |
696 | goto vc1; |
697 | } |
698 | if (strlen((char*)args) > 0) { |
699 | // the user supplied a file name |
700 | fn= args; |
701 | } else if (cfn != 0 && strlen((char*)cfn) > 0) { |
702 | // no user supplied name- use the current filename |
703 | fn= cfn; |
704 | goto vc5; |
705 | } else { |
706 | // no user file name, no current name- punt |
707 | psbs("No current filename"); |
708 | goto vc1; |
709 | } |
710 | |
711 | // see if file exists- if not, its just a new file request |
712 | if ((sr=stat((char*)fn, &st_buf)) < 0) { |
713 | // This is just a request for a new file creation. |
714 | // The file_insert below will fail but we get |
715 | // an empty buffer with a file name. Then the "write" |
716 | // command can do the create. |
717 | } else { |
718 | if ((st_buf.st_mode & (S_IFREG)) == 0) { |
719 | // This is not a regular file |
720 | psbs("\"%s\" is not a regular file", fn); |
721 | goto vc1; |
722 | } |
723 | if ((st_buf.st_mode & (S_IRUSR | S_IRGRP | S_IROTH)) == 0) { |
724 | // dont have any read permissions |
725 | psbs("\"%s\" is not readable", fn); |
726 | goto vc1; |
727 | } |
728 | } |
729 | |
730 | // There is a read-able regular file |
731 | // make this the current file |
732 | q = (Byte *) xstrdup((char *) fn); // save the cfn |
733 | free(cfn); // free the old name |
734 | cfn = q; // remember new cfn |
735 | |
736 | vc5: |
737 | // delete all the contents of text[] |
738 | new_text(2 * file_size(fn)); |
739 | screenbegin = dot = end = text; |
740 | |
741 | // insert new file |
742 | ch = file_insert(fn, text, file_size(fn)); |
743 | |
744 | if (ch < 1) { |
745 | // start empty buf with dummy line |
746 | (void) char_insert(text, '\n'); |
747 | ch= 1; |
748 | } |
749 | file_modified = 0; |
750 | last_file_modified = -1; |
751 | #if ENABLE_FEATURE_VI_YANKMARK |
752 | if (Ureg >= 0 && Ureg < 28 && reg[Ureg] != 0) { |
753 | free(reg[Ureg]); // free orig line reg- for 'U' |
754 | reg[Ureg]= 0; |
755 | } |
756 | if (YDreg >= 0 && YDreg < 28 && reg[YDreg] != 0) { |
757 | free(reg[YDreg]); // free default yank/delete register |
758 | reg[YDreg]= 0; |
759 | } |
760 | for (li = 0; li < 28; li++) { |
761 | mark[li] = 0; |
762 | } // init the marks |
763 | #endif |
764 | // how many lines in text[]? |
765 | li = count_lines(text, end - 1); |
766 | psb("\"%s\"%s" |
767 | #if ENABLE_FEATURE_VI_READONLY |
768 | "%s" |
769 | #endif |
770 | " %dL, %dC", cfn, |
771 | (sr < 0 ? " [New file]" : ""), |
772 | #if ENABLE_FEATURE_VI_READONLY |
773 | ((vi_readonly || readonly) ? " [Read only]" : ""), |
774 | #endif |
775 | li, ch); |
776 | } else if (strncasecmp((char *) cmd, "file", i) == 0) { // what File is this |
777 | if (b != -1 || e != -1) { |
778 | ni((Byte *) "No address allowed on this command"); |
779 | goto vc1; |
780 | } |
781 | if (strlen((char *) args) > 0) { |
782 | // user wants a new filename |
783 | free(cfn); |
784 | cfn = (Byte *) xstrdup((char *) args); |
785 | } else { |
786 | // user wants file status info |
787 | last_status_cksum = 0; // force status update |
788 | } |
789 | } else if (strncasecmp((char *) cmd, "features", i) == 0) { // what features are available |
790 | // print out values of all features |
791 | place_cursor(rows - 1, 0, FALSE); // go to Status line, bottom of screen |
792 | clear_to_eol(); // clear the line |
793 | cookmode(); |
794 | show_help(); |
795 | rawmode(); |
796 | Hit_Return(); |
797 | } else if (strncasecmp((char *) cmd, "list", i) == 0) { // literal print line |
798 | if (b < 0) { // no addr given- use defaults |
799 | q = begin_line(dot); // assume .,. for the range |
800 | r = end_line(dot); |
801 | } |
802 | place_cursor(rows - 1, 0, FALSE); // go to Status line, bottom of screen |
803 | clear_to_eol(); // clear the line |
804 | puts("\r"); |
805 | for (; q <= r; q++) { |
806 | int c_is_no_print; |
807 | |
808 | c = *q; |
809 | c_is_no_print = c > 127 && !Isprint(c); |
810 | if (c_is_no_print) { |
811 | c = '.'; |
812 | standout_start(); |
813 | } |
814 | if (c == '\n') { |
815 | write1("$\r"); |
816 | } else if (c < ' ' || c == 127) { |
817 | putchar('^'); |
818 | if(c == 127) |
819 | c = '?'; |
820 | else |
821 | c += '@'; |
822 | } |
823 | putchar(c); |
824 | if (c_is_no_print) |
825 | standout_end(); |
826 | } |
827 | #if ENABLE_FEATURE_VI_SET |
828 | vc2: |
829 | #endif |
830 | Hit_Return(); |
831 | } else if ((strncasecmp((char *) cmd, "quit", i) == 0) || // Quit |
832 | (strncasecmp((char *) cmd, "next", i) == 0)) { // edit next file |
833 | if (useforce) { |
834 | // force end of argv list |
835 | if (*cmd == 'q') { |
836 | optind = save_argc; |
837 | } |
838 | editing = 0; |
839 | goto vc1; |
840 | } |
841 | // don't exit if the file been modified |
842 | if (file_modified) { |
843 | psbs("No write since last change (:%s! overrides)", |
844 | (*cmd == 'q' ? "quit" : "next")); |
845 | goto vc1; |
846 | } |
847 | // are there other file to edit |
848 | if (*cmd == 'q' && optind < save_argc - 1) { |
849 | psbs("%d more file to edit", (save_argc - optind - 1)); |
850 | goto vc1; |
851 | } |
852 | if (*cmd == 'n' && optind >= save_argc - 1) { |
853 | psbs("No more files to edit"); |
854 | goto vc1; |
855 | } |
856 | editing = 0; |
857 | } else if (strncasecmp((char *) cmd, "read", i) == 0) { // read file into text[] |
858 | fn = args; |
859 | if (strlen((char *) fn) <= 0) { |
860 | psbs("No filename given"); |
861 | goto vc1; |
862 | } |
863 | if (b < 0) { // no addr given- use defaults |
864 | q = begin_line(dot); // assume "dot" |
865 | } |
866 | // read after current line- unless user said ":0r foo" |
867 | if (b != 0) |
868 | q = next_line(q); |
869 | #if ENABLE_FEATURE_VI_READONLY |
870 | l= readonly; // remember current files' status |
871 | #endif |
872 | ch = file_insert(fn, q, file_size(fn)); |
873 | #if ENABLE_FEATURE_VI_READONLY |
874 | readonly= l; |
875 | #endif |
876 | if (ch < 0) |
877 | goto vc1; // nothing was inserted |
878 | // how many lines in text[]? |
879 | li = count_lines(q, q + ch - 1); |
880 | psb("\"%s\"" |
881 | #if ENABLE_FEATURE_VI_READONLY |
882 | "%s" |
883 | #endif |
884 | " %dL, %dC", fn, |
885 | #if ENABLE_FEATURE_VI_READONLY |
886 | ((vi_readonly || readonly) ? " [Read only]" : ""), |
887 | #endif |
888 | li, ch); |
889 | if (ch > 0) { |
890 | // if the insert is before "dot" then we need to update |
891 | if (q <= dot) |
892 | dot += ch; |
893 | file_modified++; |
894 | } |
895 | } else if (strncasecmp((char *) cmd, "rewind", i) == 0) { // rewind cmd line args |
896 | if (file_modified && ! useforce) { |
897 | psbs("No write since last change (:rewind! overrides)"); |
898 | } else { |
899 | // reset the filenames to edit |
900 | optind = fn_start - 1; |
901 | editing = 0; |
902 | } |
903 | #if ENABLE_FEATURE_VI_SET |
904 | } else if (strncasecmp((char *) cmd, "set", i) == 0) { // set or clear features |
905 | i = 0; // offset into args |
906 | if (strlen((char *) args) == 0) { |
907 | // print out values of all options |
908 | place_cursor(rows - 1, 0, FALSE); // go to Status line, bottom of screen |
909 | clear_to_eol(); // clear the line |
910 | printf("----------------------------------------\r\n"); |
911 | #if ENABLE_FEATURE_VI_SETOPTS |
912 | if (!autoindent) |
913 | printf("no"); |
914 | printf("autoindent "); |
915 | if (!err_method) |
916 | printf("no"); |
917 | printf("flash "); |
918 | if (!ignorecase) |
919 | printf("no"); |
920 | printf("ignorecase "); |
921 | if (!showmatch) |
922 | printf("no"); |
923 | printf("showmatch "); |
924 | printf("tabstop=%d ", tabstop); |
925 | #endif |
926 | printf("\r\n"); |
927 | goto vc2; |
928 | } |
929 | if (strncasecmp((char *) args, "no", 2) == 0) |
930 | i = 2; // ":set noautoindent" |
931 | #if ENABLE_FEATURE_VI_SETOPTS |
932 | setops(args, "autoindent ", i, "ai", VI_AUTOINDENT); |
933 | setops(args, "flash ", i, "fl", VI_ERR_METHOD); |
934 | setops(args, "ignorecase ", i, "ic", VI_IGNORECASE); |
935 | setops(args, "showmatch ", i, "ic", VI_SHOWMATCH); |
936 | if (strncasecmp((char *) args + i, "tabstop=%d ", 7) == 0) { |
937 | sscanf(strchr((char *) args + i, '='), "=%d", &ch); |
938 | if (ch > 0 && ch < columns - 1) |
939 | tabstop = ch; |
940 | } |
941 | #endif /* FEATURE_VI_SETOPTS */ |
942 | #endif /* FEATURE_VI_SET */ |
943 | #if ENABLE_FEATURE_VI_SEARCH |
944 | } else if (strncasecmp((char *) cmd, "s", 1) == 0) { // substitute a pattern with a replacement pattern |
945 | Byte *ls, *F, *R; |
946 | int gflag; |
947 | |
948 | // F points to the "find" pattern |
949 | // R points to the "replace" pattern |
950 | // replace the cmd line delimiters "/" with NULLs |
951 | gflag = 0; // global replace flag |
952 | c = orig_buf[1]; // what is the delimiter |
953 | F = orig_buf + 2; // start of "find" |
954 | R = (Byte *) strchr((char *) F, c); // middle delimiter |
955 | if (!R) goto colon_s_fail; |
956 | *R++ = '\0'; // terminate "find" |
957 | buf1 = (Byte *) strchr((char *) R, c); |
958 | if (!buf1) goto colon_s_fail; |
959 | *buf1++ = '\0'; // terminate "replace" |
960 | if (*buf1 == 'g') { // :s/foo/bar/g |
961 | buf1++; |
962 | gflag++; // turn on gflag |
963 | } |
964 | q = begin_line(q); |
965 | if (b < 0) { // maybe :s/foo/bar/ |
966 | q = begin_line(dot); // start with cur line |
967 | b = count_lines(text, q); // cur line number |
968 | } |
969 | if (e < 0) |
970 | e = b; // maybe :.s/foo/bar/ |
971 | for (i = b; i <= e; i++) { // so, :20,23 s \0 find \0 replace \0 |
972 | ls = q; // orig line start |
973 | vc4: |
974 | buf1 = char_search(q, F, FORWARD, LIMITED); // search cur line only for "find" |
975 | if (buf1 != NULL) { |
976 | // we found the "find" pattern- delete it |
977 | (void) text_hole_delete(buf1, buf1 + strlen((char *) F) - 1); |
978 | // inset the "replace" patern |
979 | (void) string_insert(buf1, R); // insert the string |
980 | // check for "global" :s/foo/bar/g |
981 | if (gflag == 1) { |
982 | if ((buf1 + strlen((char *) R)) < end_line(ls)) { |
983 | q = buf1 + strlen((char *) R); |
984 | goto vc4; // don't let q move past cur line |
985 | } |
986 | } |
987 | } |
988 | q = next_line(ls); |
989 | } |
990 | #endif /* FEATURE_VI_SEARCH */ |
991 | } else if (strncasecmp((char *) cmd, "version", i) == 0) { // show software version |
992 | psb("%s", BB_VER " " BB_BT); |
993 | } else if (strncasecmp((char *) cmd, "write", i) == 0 // write text to file |
994 | || strncasecmp((char *) cmd, "wq", i) == 0 |
995 | || strncasecmp((char *) cmd, "wn", i) == 0 |
996 | || strncasecmp((char *) cmd, "x", i) == 0) { |
997 | // is there a file name to write to? |
998 | if (strlen((char *) args) > 0) { |
999 | fn = args; |
1000 | } |
1001 | #if ENABLE_FEATURE_VI_READONLY |
1002 | if ((vi_readonly || readonly) && ! useforce) { |
1003 | psbs("\"%s\" File is read only", fn); |
1004 | goto vc3; |
1005 | } |
1006 | #endif |
1007 | // how many lines in text[]? |
1008 | li = count_lines(q, r); |
1009 | ch = r - q + 1; |
1010 | // see if file exists- if not, its just a new file request |
1011 | if (useforce) { |
1012 | // if "fn" is not write-able, chmod u+w |
1013 | // sprintf(syscmd, "chmod u+w %s", fn); |
1014 | // system(syscmd); |
1015 | forced = TRUE; |
1016 | } |
1017 | l = file_write(fn, q, r); |
1018 | if (useforce && forced) { |
1019 | // chmod u-w |
1020 | // sprintf(syscmd, "chmod u-w %s", fn); |
1021 | // system(syscmd); |
1022 | forced = FALSE; |
1023 | } |
1024 | if (l < 0) { |
1025 | if (l == -1) |
1026 | psbs("Write error: %s", strerror(errno)); |
1027 | } else { |
1028 | psb("\"%s\" %dL, %dC", fn, li, l); |
1029 | if (q == text && r == end - 1 && l == ch) { |
1030 | file_modified = 0; |
1031 | last_file_modified = -1; |
1032 | } |
1033 | if ((cmd[0] == 'x' || cmd[1] == 'q' || cmd[1] == 'n' || |
1034 | cmd[0] == 'X' || cmd[1] == 'Q' || cmd[1] == 'N') |
1035 | && l == ch) { |
1036 | editing = 0; |
1037 | } |
1038 | } |
1039 | #if ENABLE_FEATURE_VI_READONLY |
1040 | vc3:; |
1041 | #endif |
1042 | #if ENABLE_FEATURE_VI_YANKMARK |
1043 | } else if (strncasecmp((char *) cmd, "yank", i) == 0) { // yank lines |
1044 | if (b < 0) { // no addr given- use defaults |
1045 | q = begin_line(dot); // assume .,. for the range |
1046 | r = end_line(dot); |
1047 | } |
1048 | text_yank(q, r, YDreg); |
1049 | li = count_lines(q, r); |
1050 | psb("Yank %d lines (%d chars) into [%c]", |
1051 | li, strlen((char *) reg[YDreg]), what_reg()); |
1052 | #endif |
1053 | } else { |
1054 | // cmd unknown |
1055 | ni((Byte *) cmd); |
1056 | } |
1057 | vc1: |
1058 | dot = bound_dot(dot); // make sure "dot" is valid |
1059 | return; |
1060 | #if ENABLE_FEATURE_VI_SEARCH |
1061 | colon_s_fail: |
1062 | psb(":s expression missing delimiters"); |
1063 | #endif |
1064 | } |
1065 | |
1066 | #endif /* FEATURE_VI_COLON */ |
1067 | |
1068 | static void Hit_Return(void) |
1069 | { |
1070 | char c; |
1071 | |
1072 | standout_start(); // start reverse video |
1073 | write1("[Hit return to continue]"); |
1074 | standout_end(); // end reverse video |
1075 | while ((c = get_one_char()) != '\n' && c != '\r') /*do nothing */ |
1076 | ; |
1077 | redraw(TRUE); // force redraw all |
1078 | } |
1079 | |
1080 | //----- Synchronize the cursor to Dot -------------------------- |
1081 | static void sync_cursor(Byte * d, int *row, int *col) |
1082 | { |
1083 | Byte *beg_cur; // begin and end of "d" line |
1084 | Byte *end_scr; // begin and end of screen |
1085 | Byte *tp; |
1086 | int cnt, ro, co; |
1087 | |
1088 | beg_cur = begin_line(d); // first char of cur line |
1089 | |
1090 | end_scr = end_screen(); // last char of screen |
1091 | |
1092 | if (beg_cur < screenbegin) { |
1093 | // "d" is before top line on screen |
1094 | // how many lines do we have to move |
1095 | cnt = count_lines(beg_cur, screenbegin); |
1096 | sc1: |
1097 | screenbegin = beg_cur; |
1098 | if (cnt > (rows - 1) / 2) { |
1099 | // we moved too many lines. put "dot" in middle of screen |
1100 | for (cnt = 0; cnt < (rows - 1) / 2; cnt++) { |
1101 | screenbegin = prev_line(screenbegin); |
1102 | } |
1103 | } |
1104 | } else if (beg_cur > end_scr) { |
1105 | // "d" is after bottom line on screen |
1106 | // how many lines do we have to move |
1107 | cnt = count_lines(end_scr, beg_cur); |
1108 | if (cnt > (rows - 1) / 2) |
1109 | goto sc1; // too many lines |
1110 | for (ro = 0; ro < cnt - 1; ro++) { |
1111 | // move screen begin the same amount |
1112 | screenbegin = next_line(screenbegin); |
1113 | // now, move the end of screen |
1114 | end_scr = next_line(end_scr); |
1115 | end_scr = end_line(end_scr); |
1116 | } |
1117 | } |
1118 | // "d" is on screen- find out which row |
1119 | tp = screenbegin; |
1120 | for (ro = 0; ro < rows - 1; ro++) { // drive "ro" to correct row |
1121 | if (tp == beg_cur) |
1122 | break; |
1123 | tp = next_line(tp); |
1124 | } |
1125 | |
1126 | // find out what col "d" is on |
1127 | co = 0; |
1128 | do { // drive "co" to correct column |
1129 | if (*tp == '\n' || *tp == '\0') |
1130 | break; |
1131 | if (*tp == '\t') { |
1132 | // 7 - (co % 8 ) |
1133 | co += ((tabstop - 1) - (co % tabstop)); |
1134 | } else if (*tp < ' ' || *tp == 127) { |
1135 | co++; // display as ^X, use 2 columns |
1136 | } |
1137 | } while (tp++ < d && ++co); |
1138 | |
1139 | // "co" is the column where "dot" is. |
1140 | // The screen has "columns" columns. |
1141 | // The currently displayed columns are 0+offset -- columns+ofset |
1142 | // |-------------------------------------------------------------| |
1143 | // ^ ^ ^ |
1144 | // offset | |------- columns ----------------| |
1145 | // |
1146 | // If "co" is already in this range then we do not have to adjust offset |
1147 | // but, we do have to subtract the "offset" bias from "co". |
1148 | // If "co" is outside this range then we have to change "offset". |
1149 | // If the first char of a line is a tab the cursor will try to stay |
1150 | // in column 7, but we have to set offset to 0. |
1151 | |
1152 | if (co < 0 + offset) { |
1153 | offset = co; |
1154 | } |
1155 | if (co >= columns + offset) { |
1156 | offset = co - columns + 1; |
1157 | } |
1158 | // if the first char of the line is a tab, and "dot" is sitting on it |
1159 | // force offset to 0. |
1160 | if (d == beg_cur && *d == '\t') { |
1161 | offset = 0; |
1162 | } |
1163 | co -= offset; |
1164 | |
1165 | *row = ro; |
1166 | *col = co; |
1167 | } |
1168 | |
1169 | //----- Text Movement Routines --------------------------------- |
1170 | static Byte *begin_line(Byte * p) // return pointer to first char cur line |
1171 | { |
1172 | while (p > text && p[-1] != '\n') |
1173 | p--; // go to cur line B-o-l |
1174 | return p; |
1175 | } |
1176 | |
1177 | static Byte *end_line(Byte * p) // return pointer to NL of cur line line |
1178 | { |
1179 | while (p < end - 1 && *p != '\n') |
1180 | p++; // go to cur line E-o-l |
1181 | return p; |
1182 | } |
1183 | |
1184 | static inline Byte *dollar_line(Byte * p) // return pointer to just before NL line |
1185 | { |
1186 | while (p < end - 1 && *p != '\n') |
1187 | p++; // go to cur line E-o-l |
1188 | // Try to stay off of the Newline |
1189 | if (*p == '\n' && (p - begin_line(p)) > 0) |
1190 | p--; |
1191 | return p; |
1192 | } |
1193 | |
1194 | static Byte *prev_line(Byte * p) // return pointer first char prev line |
1195 | { |
1196 | p = begin_line(p); // goto begining of cur line |
1197 | if (p[-1] == '\n' && p > text) |
1198 | p--; // step to prev line |
1199 | p = begin_line(p); // goto begining of prev line |
1200 | return p; |
1201 | } |
1202 | |
1203 | static Byte *next_line(Byte * p) // return pointer first char next line |
1204 | { |
1205 | p = end_line(p); |
1206 | if (*p == '\n' && p < end - 1) |
1207 | p++; // step to next line |
1208 | return p; |
1209 | } |
1210 | |
1211 | //----- Text Information Routines ------------------------------ |
1212 | static Byte *end_screen(void) |
1213 | { |
1214 | Byte *q; |
1215 | int cnt; |
1216 | |
1217 | // find new bottom line |
1218 | q = screenbegin; |
1219 | for (cnt = 0; cnt < rows - 2; cnt++) |
1220 | q = next_line(q); |
1221 | q = end_line(q); |
1222 | return q; |
1223 | } |
1224 | |
1225 | static int count_lines(Byte * start, Byte * stop) // count line from start to stop |
1226 | { |
1227 | Byte *q; |
1228 | int cnt; |
1229 | |
1230 | if (stop < start) { // start and stop are backwards- reverse them |
1231 | q = start; |
1232 | start = stop; |
1233 | stop = q; |
1234 | } |
1235 | cnt = 0; |
1236 | stop = end_line(stop); // get to end of this line |
1237 | for (q = start; q <= stop && q <= end - 1; q++) { |
1238 | if (*q == '\n') |
1239 | cnt++; |
1240 | } |
1241 | return cnt; |
1242 | } |
1243 | |
1244 | static Byte *find_line(int li) // find begining of line #li |
1245 | { |
1246 | Byte *q; |
1247 | |
1248 | for (q = text; li > 1; li--) { |
1249 | q = next_line(q); |
1250 | } |
1251 | return q; |
1252 | } |
1253 | |
1254 | //----- Dot Movement Routines ---------------------------------- |
1255 | static void dot_left(void) |
1256 | { |
1257 | if (dot > text && dot[-1] != '\n') |
1258 | dot--; |
1259 | } |
1260 | |
1261 | static void dot_right(void) |
1262 | { |
1263 | if (dot < end - 1 && *dot != '\n') |
1264 | dot++; |
1265 | } |
1266 | |
1267 | static void dot_begin(void) |
1268 | { |
1269 | dot = begin_line(dot); // return pointer to first char cur line |
1270 | } |
1271 | |
1272 | static void dot_end(void) |
1273 | { |
1274 | dot = end_line(dot); // return pointer to last char cur line |
1275 | } |
1276 | |
1277 | static Byte *move_to_col(Byte * p, int l) |
1278 | { |
1279 | int co; |
1280 | |
1281 | p = begin_line(p); |
1282 | co = 0; |
1283 | do { |
1284 | if (*p == '\n' || *p == '\0') |
1285 | break; |
1286 | if (*p == '\t') { |
1287 | // 7 - (co % 8 ) |
1288 | co += ((tabstop - 1) - (co % tabstop)); |
1289 | } else if (*p < ' ' || *p == 127) { |
1290 | co++; // display as ^X, use 2 columns |
1291 | } |
1292 | } while (++co <= l && p++ < end); |
1293 | return p; |
1294 | } |
1295 | |
1296 | static void dot_next(void) |
1297 | { |
1298 | dot = next_line(dot); |
1299 | } |
1300 | |
1301 | static void dot_prev(void) |
1302 | { |
1303 | dot = prev_line(dot); |
1304 | } |
1305 | |
1306 | static void dot_scroll(int cnt, int dir) |
1307 | { |
1308 | Byte *q; |
1309 | |
1310 | for (; cnt > 0; cnt--) { |
1311 | if (dir < 0) { |
1312 | // scroll Backwards |
1313 | // ctrl-Y scroll up one line |
1314 | screenbegin = prev_line(screenbegin); |
1315 | } else { |
1316 | // scroll Forwards |
1317 | // ctrl-E scroll down one line |
1318 | screenbegin = next_line(screenbegin); |
1319 | } |
1320 | } |
1321 | // make sure "dot" stays on the screen so we dont scroll off |
1322 | if (dot < screenbegin) |
1323 | dot = screenbegin; |
1324 | q = end_screen(); // find new bottom line |
1325 | if (dot > q) |
1326 | dot = begin_line(q); // is dot is below bottom line? |
1327 | dot_skip_over_ws(); |
1328 | } |
1329 | |
1330 | static void dot_skip_over_ws(void) |
1331 | { |
1332 | // skip WS |
1333 | while (isspace(*dot) && *dot != '\n' && dot < end - 1) |
1334 | dot++; |
1335 | } |
1336 | |
1337 | static void dot_delete(void) // delete the char at 'dot' |
1338 | { |
1339 | (void) text_hole_delete(dot, dot); |
1340 | } |
1341 | |
1342 | static Byte *bound_dot(Byte * p) // make sure text[0] <= P < "end" |
1343 | { |
1344 | if (p >= end && end > text) { |
1345 | p = end - 1; |
1346 | indicate_error('1'); |
1347 | } |
1348 | if (p < text) { |
1349 | p = text; |
1350 | indicate_error('2'); |
1351 | } |
1352 | return p; |
1353 | } |
1354 | |
1355 | //----- Helper Utility Routines -------------------------------- |
1356 | |
1357 | //---------------------------------------------------------------- |
1358 | //----- Char Routines -------------------------------------------- |
1359 | /* Chars that are part of a word- |
1360 | * 0123456789_ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz |
1361 | * Chars that are Not part of a word (stoppers) |
1362 | * !"#$%&'()*+,-./:;<=>?@[\]^`{|}~ |
1363 | * Chars that are WhiteSpace |
1364 | * TAB NEWLINE VT FF RETURN SPACE |
1365 | * DO NOT COUNT NEWLINE AS WHITESPACE |
1366 | */ |
1367 | |
1368 | static Byte *new_screen(int ro, int co) |
1369 | { |
1370 | int li; |
1371 | |
1372 | free(screen); |
1373 | screensize = ro * co + 8; |
1374 | screen = xmalloc(screensize); |
1375 | // initialize the new screen. assume this will be a empty file. |
1376 | screen_erase(); |
1377 | // non-existent text[] lines start with a tilde (~). |
1378 | for (li = 1; li < ro - 1; li++) { |
1379 | screen[(li * co) + 0] = '~'; |
1380 | } |
1381 | return screen; |
1382 | } |
1383 | |
1384 | static Byte *new_text(int size) |
1385 | { |
1386 | if (size < 10240) |
1387 | size = 10240; // have a minimum size for new files |
1388 | free(text); |
1389 | text = xmalloc(size + 8); |
1390 | memset(text, '\0', size); // clear new text[] |
1391 | //text += 4; // leave some room for "oops" |
1392 | return text; |
1393 | } |
1394 | |
1395 | #if ENABLE_FEATURE_VI_SEARCH |
1396 | static int mycmp(Byte * s1, Byte * s2, int len) |
1397 | { |
1398 | int i; |
1399 | |
1400 | i = strncmp((char *) s1, (char *) s2, len); |
1401 | #if ENABLE_FEATURE_VI_SETOPTS |
1402 | if (ignorecase) { |
1403 | i = strncasecmp((char *) s1, (char *) s2, len); |
1404 | } |
1405 | #endif |
1406 | return i; |
1407 | } |
1408 | |
1409 | static Byte *char_search(Byte * p, Byte * pat, int dir, int range) // search for pattern starting at p |
1410 | { |
1411 | #ifndef REGEX_SEARCH |
1412 | Byte *start, *stop; |
1413 | int len; |
1414 | |
1415 | len = strlen((char *) pat); |
1416 | if (dir == FORWARD) { |
1417 | stop = end - 1; // assume range is p - end-1 |
1418 | if (range == LIMITED) |
1419 | stop = next_line(p); // range is to next line |
1420 | for (start = p; start < stop; start++) { |
1421 | if (mycmp(start, pat, len) == 0) { |
1422 | return start; |
1423 | } |
1424 | } |
1425 | } else if (dir == BACK) { |
1426 | stop = text; // assume range is text - p |
1427 | if (range == LIMITED) |
1428 | stop = prev_line(p); // range is to prev line |
1429 | for (start = p - len; start >= stop; start--) { |
1430 | if (mycmp(start, pat, len) == 0) { |
1431 | return start; |
1432 | } |
1433 | } |
1434 | } |
1435 | // pattern not found |
1436 | return NULL; |
1437 | #else /*REGEX_SEARCH */ |
1438 | char *q; |
1439 | struct re_pattern_buffer preg; |
1440 | int i; |
1441 | int size, range; |
1442 | |
1443 | re_syntax_options = RE_SYNTAX_POSIX_EXTENDED; |
1444 | preg.translate = 0; |
1445 | preg.fastmap = 0; |
1446 | preg.buffer = 0; |
1447 | preg.allocated = 0; |
1448 | |
1449 | // assume a LIMITED forward search |
1450 | q = next_line(p); |
1451 | q = end_line(q); |
1452 | q = end - 1; |
1453 | if (dir == BACK) { |
1454 | q = prev_line(p); |
1455 | q = text; |
1456 | } |
1457 | // count the number of chars to search over, forward or backward |
1458 | size = q - p; |
1459 | if (size < 0) |
1460 | size = p - q; |
1461 | // RANGE could be negative if we are searching backwards |
1462 | range = q - p; |
1463 | |
1464 | q = (char *) re_compile_pattern(pat, strlen((char *) pat), &preg); |
1465 | if (q != 0) { |
1466 | // The pattern was not compiled |
1467 | psbs("bad search pattern: \"%s\": %s", pat, q); |
1468 | i = 0; // return p if pattern not compiled |
1469 | goto cs1; |
1470 | } |
1471 | |
1472 | q = p; |
1473 | if (range < 0) { |
1474 | q = p - size; |
1475 | if (q < text) |
1476 | q = text; |
1477 | } |
1478 | // search for the compiled pattern, preg, in p[] |
1479 | // range < 0- search backward |
1480 | // range > 0- search forward |
1481 | // 0 < start < size |
1482 | // re_search() < 0 not found or error |
1483 | // re_search() > 0 index of found pattern |
1484 | // struct pattern char int int int struct reg |
1485 | // re_search (*pattern_buffer, *string, size, start, range, *regs) |
1486 | i = re_search(&preg, q, size, 0, range, 0); |
1487 | if (i == -1) { |
1488 | p = 0; |
1489 | i = 0; // return NULL if pattern not found |
1490 | } |
1491 | cs1: |
1492 | if (dir == FORWARD) { |
1493 | p = p + i; |
1494 | } else { |
1495 | p = p - i; |
1496 | } |
1497 | return p; |
1498 | #endif /* REGEX_SEARCH */ |
1499 | } |
1500 | #endif /* FEATURE_VI_SEARCH */ |
1501 | |
1502 | static Byte *char_insert(Byte * p, Byte c) // insert the char c at 'p' |
1503 | { |
1504 | if (c == 22) { // Is this an ctrl-V? |
1505 | p = stupid_insert(p, '^'); // use ^ to indicate literal next |
1506 | p--; // backup onto ^ |
1507 | refresh(FALSE); // show the ^ |
1508 | c = get_one_char(); |
1509 | *p = c; |
1510 | p++; |
1511 | file_modified++; // has the file been modified |
1512 | } else if (c == 27) { // Is this an ESC? |
1513 | cmd_mode = 0; |
1514 | cmdcnt = 0; |
1515 | end_cmd_q(); // stop adding to q |
1516 | last_status_cksum = 0; // force status update |
1517 | if ((p[-1] != '\n') && (dot>text)) { |
1518 | p--; |
1519 | } |
1520 | } else if (c == erase_char || c == 8 || c == 127) { // Is this a BS |
1521 | // 123456789 |
1522 | if ((p[-1] != '\n') && (dot>text)) { |
1523 | p--; |
1524 | p = text_hole_delete(p, p); // shrink buffer 1 char |
1525 | } |
1526 | } else { |
1527 | // insert a char into text[] |
1528 | Byte *sp; // "save p" |
1529 | |
1530 | if (c == 13) |
1531 | c = '\n'; // translate \r to \n |
1532 | sp = p; // remember addr of insert |
1533 | p = stupid_insert(p, c); // insert the char |
1534 | #if ENABLE_FEATURE_VI_SETOPTS |
1535 | if (showmatch && strchr(")]}", *sp) != NULL) { |
1536 | showmatching(sp); |
1537 | } |
1538 | if (autoindent && c == '\n') { // auto indent the new line |
1539 | Byte *q; |
1540 | |
1541 | q = prev_line(p); // use prev line as templet |
1542 | for (; isblnk(*q); q++) { |
1543 | p = stupid_insert(p, *q); // insert the char |
1544 | } |
1545 | } |
1546 | #endif |
1547 | } |
1548 | return p; |
1549 | } |
1550 | |
1551 | static Byte *stupid_insert(Byte * p, Byte c) // stupidly insert the char c at 'p' |
1552 | { |
1553 | p = text_hole_make(p, 1); |
1554 | if (p != 0) { |
1555 | *p = c; |
1556 | file_modified++; // has the file been modified |
1557 | p++; |
1558 | } |
1559 | return p; |
1560 | } |
1561 | |
1562 | static Byte find_range(Byte ** start, Byte ** stop, Byte c) |
1563 | { |
1564 | Byte *save_dot, *p, *q; |
1565 | int cnt; |
1566 | |
1567 | save_dot = dot; |
1568 | p = q = dot; |
1569 | |
1570 | if (strchr("cdy><", c)) { |
1571 | // these cmds operate on whole lines |
1572 | p = q = begin_line(p); |
1573 | for (cnt = 1; cnt < cmdcnt; cnt++) { |
1574 | q = next_line(q); |
1575 | } |
1576 | q = end_line(q); |
1577 | } else if (strchr("^%$0bBeEft", c)) { |
1578 | // These cmds operate on char positions |
1579 | do_cmd(c); // execute movement cmd |
1580 | q = dot; |
1581 | } else if (strchr("wW", c)) { |
1582 | do_cmd(c); // execute movement cmd |
1583 | // if we are at the next word's first char |
1584 | // step back one char |
1585 | // but check the possibilities when it is true |
1586 | if (dot > text && ((isspace(dot[-1]) && !isspace(dot[0])) |
1587 | || (ispunct(dot[-1]) && !ispunct(dot[0])) |
1588 | || (isalnum(dot[-1]) && !isalnum(dot[0])))) |
1589 | dot--; // move back off of next word |
1590 | if (dot > text && *dot == '\n') |
1591 | dot--; // stay off NL |
1592 | q = dot; |
1593 | } else if (strchr("H-k{", c)) { |
1594 | // these operate on multi-lines backwards |
1595 | q = end_line(dot); // find NL |
1596 | do_cmd(c); // execute movement cmd |
1597 | dot_begin(); |
1598 | p = dot; |
1599 | } else if (strchr("L+j}\r\n", c)) { |
1600 | // these operate on multi-lines forwards |
1601 | p = begin_line(dot); |
1602 | do_cmd(c); // execute movement cmd |
1603 | dot_end(); // find NL |
1604 | q = dot; |
1605 | } else { |
1606 | c = 27; // error- return an ESC char |
1607 | //break; |
1608 | } |
1609 | *start = p; |
1610 | *stop = q; |
1611 | if (q < p) { |
1612 | *start = q; |
1613 | *stop = p; |
1614 | } |
1615 | dot = save_dot; |
1616 | return c; |
1617 | } |
1618 | |
1619 | static int st_test(Byte * p, int type, int dir, Byte * tested) |
1620 | { |
1621 | Byte c, c0, ci; |
1622 | int test, inc; |
1623 | |
1624 | inc = dir; |
1625 | c = c0 = p[0]; |
1626 | ci = p[inc]; |
1627 | test = 0; |
1628 | |
1629 | if (type == S_BEFORE_WS) { |
1630 | c = ci; |
1631 | test = ((!isspace(c)) || c == '\n'); |
1632 | } |
1633 | if (type == S_TO_WS) { |
1634 | c = c0; |
1635 | test = ((!isspace(c)) || c == '\n'); |
1636 | } |
1637 | if (type == S_OVER_WS) { |
1638 | c = c0; |
1639 | test = ((isspace(c))); |
1640 | } |
1641 | if (type == S_END_PUNCT) { |
1642 | c = ci; |
1643 | test = ((ispunct(c))); |
1644 | } |
1645 | if (type == S_END_ALNUM) { |
1646 | c = ci; |
1647 | test = ((isalnum(c)) || c == '_'); |
1648 | } |
1649 | *tested = c; |
1650 | return test; |
1651 | } |
1652 | |
1653 | static Byte *skip_thing(Byte * p, int linecnt, int dir, int type) |
1654 | { |
1655 | Byte c; |
1656 | |
1657 | while (st_test(p, type, dir, &c)) { |
1658 | // make sure we limit search to correct number of lines |
1659 | if (c == '\n' && --linecnt < 1) |
1660 | break; |
1661 | if (dir >= 0 && p >= end - 1) |
1662 | break; |
1663 | if (dir < 0 && p <= text) |
1664 | break; |
1665 | p += dir; // move to next char |
1666 | } |
1667 | return p; |
1668 | } |
1669 | |
1670 | // find matching char of pair () [] {} |
1671 | static Byte *find_pair(Byte * p, Byte c) |
1672 | { |
1673 | Byte match, *q; |
1674 | int dir, level; |
1675 | |
1676 | match = ')'; |
1677 | level = 1; |
1678 | dir = 1; // assume forward |
1679 | switch (c) { |
1680 | case '(': |
1681 | match = ')'; |
1682 | break; |
1683 | case '[': |
1684 | match = ']'; |
1685 | break; |
1686 | case '{': |
1687 | match = '}'; |
1688 | break; |
1689 | case ')': |
1690 | match = '('; |
1691 | dir = -1; |
1692 | break; |
1693 | case ']': |
1694 | match = '['; |
1695 | dir = -1; |
1696 | break; |
1697 | case '}': |
1698 | match = '{'; |
1699 | dir = -1; |
1700 | break; |
1701 | } |
1702 | for (q = p + dir; text <= q && q < end; q += dir) { |
1703 | // look for match, count levels of pairs (( )) |
1704 | if (*q == c) |
1705 | level++; // increase pair levels |
1706 | if (*q == match) |
1707 | level--; // reduce pair level |
1708 | if (level == 0) |
1709 | break; // found matching pair |
1710 | } |
1711 | if (level != 0) |
1712 | q = NULL; // indicate no match |
1713 | return q; |
1714 | } |
1715 | |
1716 | #if ENABLE_FEATURE_VI_SETOPTS |
1717 | // show the matching char of a pair, () [] {} |
1718 | static void showmatching(Byte * p) |
1719 | { |
1720 | Byte *q, *save_dot; |
1721 | |
1722 | // we found half of a pair |
1723 | q = find_pair(p, *p); // get loc of matching char |
1724 | if (q == NULL) { |
1725 | indicate_error('3'); // no matching char |
1726 | } else { |
1727 | // "q" now points to matching pair |
1728 | save_dot = dot; // remember where we are |
1729 | dot = q; // go to new loc |
1730 | refresh(FALSE); // let the user see it |
1731 | (void) mysleep(40); // give user some time |
1732 | dot = save_dot; // go back to old loc |
1733 | refresh(FALSE); |
1734 | } |
1735 | } |
1736 | #endif /* FEATURE_VI_SETOPTS */ |
1737 | |
1738 | // open a hole in text[] |
1739 | static Byte *text_hole_make(Byte * p, int size) // at "p", make a 'size' byte hole |
1740 | { |
1741 | Byte *src, *dest; |
1742 | int cnt; |
1743 | |
1744 | if (size <= 0) |
1745 | goto thm0; |
1746 | src = p; |
1747 | dest = p + size; |
1748 | cnt = end - src; // the rest of buffer |
1749 | if (memmove(dest, src, cnt) != dest) { |
1750 | psbs("can't create room for new characters"); |
1751 | } |
1752 | memset(p, ' ', size); // clear new hole |
1753 | end = end + size; // adjust the new END |
1754 | file_modified++; // has the file been modified |
1755 | thm0: |
1756 | return p; |
1757 | } |
1758 | |
1759 | // close a hole in text[] |
1760 | static Byte *text_hole_delete(Byte * p, Byte * q) // delete "p" thru "q", inclusive |
1761 | { |
1762 | Byte *src, *dest; |
1763 | int cnt, hole_size; |
1764 | |
1765 | // move forwards, from beginning |
1766 | // assume p <= q |
1767 | src = q + 1; |
1768 | dest = p; |
1769 | if (q < p) { // they are backward- swap them |
1770 | src = p + 1; |
1771 | dest = q; |
1772 | } |
1773 | hole_size = q - p + 1; |
1774 | cnt = end - src; |
1775 | if (src < text || src > end) |
1776 | goto thd0; |
1777 | if (dest < text || dest >= end) |
1778 | goto thd0; |
1779 | if (src >= end) |
1780 | goto thd_atend; // just delete the end of the buffer |
1781 | if (memmove(dest, src, cnt) != dest) { |
1782 | psbs("can't delete the character"); |
1783 | } |
1784 | thd_atend: |
1785 | end = end - hole_size; // adjust the new END |
1786 | if (dest >= end) |
1787 | dest = end - 1; // make sure dest in below end-1 |
1788 | if (end <= text) |
1789 | dest = end = text; // keep pointers valid |
1790 | file_modified++; // has the file been modified |
1791 | thd0: |
1792 | return dest; |
1793 | } |
1794 | |
1795 | // copy text into register, then delete text. |
1796 | // if dist <= 0, do not include, or go past, a NewLine |
1797 | // |
1798 | static Byte *yank_delete(Byte * start, Byte * stop, int dist, int yf) |
1799 | { |
1800 | Byte *p; |
1801 | |
1802 | // make sure start <= stop |
1803 | if (start > stop) { |
1804 | // they are backwards, reverse them |
1805 | p = start; |
1806 | start = stop; |
1807 | stop = p; |
1808 | } |
1809 | if (dist <= 0) { |
1810 | // we cannot cross NL boundaries |
1811 | p = start; |
1812 | if (*p == '\n') |
1813 | return p; |
1814 | // dont go past a NewLine |
1815 | for (; p + 1 <= stop; p++) { |
1816 | if (p[1] == '\n') { |
1817 | stop = p; // "stop" just before NewLine |
1818 | break; |
1819 | } |
1820 | } |
1821 | } |
1822 | p = start; |
1823 | #if ENABLE_FEATURE_VI_YANKMARK |
1824 | text_yank(start, stop, YDreg); |
1825 | #endif |
1826 | if (yf == YANKDEL) { |
1827 | p = text_hole_delete(start, stop); |
1828 | } // delete lines |
1829 | return p; |
1830 | } |
1831 | |
1832 | static void show_help(void) |
1833 | { |
1834 | puts("These features are available:" |
1835 | #if ENABLE_FEATURE_VI_SEARCH |
1836 | "\n\tPattern searches with / and ?" |
1837 | #endif |
1838 | #if ENABLE_FEATURE_VI_DOT_CMD |
1839 | "\n\tLast command repeat with \'.\'" |
1840 | #endif |
1841 | #if ENABLE_FEATURE_VI_YANKMARK |
1842 | "\n\tLine marking with 'x" |
1843 | "\n\tNamed buffers with \"x" |
1844 | #endif |
1845 | #if ENABLE_FEATURE_VI_READONLY |
1846 | "\n\tReadonly if vi is called as \"view\"" |
1847 | "\n\tReadonly with -R command line arg" |
1848 | #endif |
1849 | #if ENABLE_FEATURE_VI_SET |
1850 | "\n\tSome colon mode commands with \':\'" |
1851 | #endif |
1852 | #if ENABLE_FEATURE_VI_SETOPTS |
1853 | "\n\tSettable options with \":set\"" |
1854 | #endif |
1855 | #if ENABLE_FEATURE_VI_USE_SIGNALS |
1856 | "\n\tSignal catching- ^C" |
1857 | "\n\tJob suspend and resume with ^Z" |
1858 | #endif |
1859 | #if ENABLE_FEATURE_VI_WIN_RESIZE |
1860 | "\n\tAdapt to window re-sizes" |
1861 | #endif |
1862 | ); |
1863 | } |
1864 | |
1865 | static inline void print_literal(Byte * buf, Byte * s) // copy s to buf, convert unprintable |
1866 | { |
1867 | Byte c, b[2]; |
1868 | |
1869 | b[1] = '\0'; |
1870 | strcpy((char *) buf, ""); // init buf |
1871 | if (strlen((char *) s) <= 0) |
1872 | s = (Byte *) "(NULL)"; |
1873 | for (; *s > '\0'; s++) { |
1874 | int c_is_no_print; |
1875 | |
1876 | c = *s; |
1877 | c_is_no_print = c > 127 && !Isprint(c); |
1878 | if (c_is_no_print) { |
1879 | strcat((char *) buf, SOn); |
1880 | c = '.'; |
1881 | } |
1882 | if (c < ' ' || c == 127) { |
1883 | strcat((char *) buf, "^"); |
1884 | if(c == 127) |
1885 | c = '?'; |
1886 | else |
1887 | c += '@'; |
1888 | } |
1889 | b[0] = c; |
1890 | strcat((char *) buf, (char *) b); |
1891 | if (c_is_no_print) |
1892 | strcat((char *) buf, SOs); |
1893 | if (*s == '\n') { |
1894 | strcat((char *) buf, "$"); |
1895 | } |
1896 | } |
1897 | } |
1898 | |
1899 | #if ENABLE_FEATURE_VI_DOT_CMD |
1900 | static void start_new_cmd_q(Byte c) |
1901 | { |
1902 | // release old cmd |
1903 | free(last_modifying_cmd); |
1904 | // get buffer for new cmd |
1905 | last_modifying_cmd = xmalloc(BUFSIZ); |
1906 | memset(last_modifying_cmd, '\0', BUFSIZ); // clear new cmd queue |
1907 | // if there is a current cmd count put it in the buffer first |
1908 | if (cmdcnt > 0) |
1909 | sprintf((char *) last_modifying_cmd, "%d%c", cmdcnt, c); |
1910 | else // just save char c onto queue |
1911 | last_modifying_cmd[0] = c; |
1912 | adding2q = 1; |
1913 | } |
1914 | |
1915 | static void end_cmd_q(void) |
1916 | { |
1917 | #if ENABLE_FEATURE_VI_YANKMARK |
1918 | YDreg = 26; // go back to default Yank/Delete reg |
1919 | #endif |
1920 | adding2q = 0; |
1921 | return; |
1922 | } |
1923 | #endif /* FEATURE_VI_DOT_CMD */ |
1924 | |
1925 | #if ENABLE_FEATURE_VI_YANKMARK \ |
1926 | || (ENABLE_FEATURE_VI_COLON && ENABLE_FEATURE_VI_SEARCH) \ |
1927 | || ENABLE_FEATURE_VI_CRASHME |
1928 | static Byte *string_insert(Byte * p, Byte * s) // insert the string at 'p' |
1929 | { |
1930 | int cnt, i; |
1931 | |
1932 | i = strlen((char *) s); |
1933 | p = text_hole_make(p, i); |
1934 | strncpy((char *) p, (char *) s, i); |
1935 | for (cnt = 0; *s != '\0'; s++) { |
1936 | if (*s == '\n') |
1937 | cnt++; |
1938 | } |
1939 | #if ENABLE_FEATURE_VI_YANKMARK |
1940 | psb("Put %d lines (%d chars) from [%c]", cnt, i, what_reg()); |
1941 | #endif |
1942 | return p; |
1943 | } |
1944 | #endif |
1945 | |
1946 | #if ENABLE_FEATURE_VI_YANKMARK |
1947 | static Byte *text_yank(Byte * p, Byte * q, int dest) // copy text into a register |
1948 | { |
1949 | Byte *t; |
1950 | int cnt; |
1951 | |
1952 | if (q < p) { // they are backwards- reverse them |
1953 | t = q; |
1954 | q = p; |
1955 | p = t; |
1956 | } |
1957 | cnt = q - p + 1; |
1958 | t = reg[dest]; |
1959 | free(t); // if already a yank register, free it |
1960 | t = xmalloc(cnt + 1); // get a new register |
1961 | memset(t, '\0', cnt + 1); // clear new text[] |
1962 | strncpy((char *) t, (char *) p, cnt); // copy text[] into bufer |
1963 | reg[dest] = t; |
1964 | return p; |
1965 | } |
1966 | |
1967 | static Byte what_reg(void) |
1968 | { |
1969 | Byte c; |
1970 | |
1971 | c = 'D'; // default to D-reg |
1972 | if (0 <= YDreg && YDreg <= 25) |
1973 | c = 'a' + (Byte) YDreg; |
1974 | if (YDreg == 26) |
1975 | c = 'D'; |
1976 | if (YDreg == 27) |
1977 | c = 'U'; |
1978 | return c; |
1979 | } |
1980 | |
1981 | static void check_context(Byte cmd) |
1982 | { |
1983 | // A context is defined to be "modifying text" |
1984 | // Any modifying command establishes a new context. |
1985 | |
1986 | if (dot < context_start || dot > context_end) { |
1987 | if (strchr((char *) modifying_cmds, cmd) != NULL) { |
1988 | // we are trying to modify text[]- make this the current context |
1989 | mark[27] = mark[26]; // move cur to prev |
1990 | mark[26] = dot; // move local to cur |
1991 | context_start = prev_line(prev_line(dot)); |
1992 | context_end = next_line(next_line(dot)); |
1993 | //loiter= start_loiter= now; |
1994 | } |
1995 | } |
1996 | return; |
1997 | } |
1998 | |
1999 | static inline Byte *swap_context(Byte * p) // goto new context for '' command make this the current context |
2000 | { |
2001 | Byte *tmp; |
2002 | |
2003 | // the current context is in mark[26] |
2004 | // the previous context is in mark[27] |
2005 | // only swap context if other context is valid |
2006 | if (text <= mark[27] && mark[27] <= end - 1) { |
2007 | tmp = mark[27]; |
2008 | mark[27] = mark[26]; |
2009 | mark[26] = tmp; |
2010 | p = mark[26]; // where we are going- previous context |
2011 | context_start = prev_line(prev_line(prev_line(p))); |
2012 | context_end = next_line(next_line(next_line(p))); |
2013 | } |
2014 | return p; |
2015 | } |
2016 | #endif /* FEATURE_VI_YANKMARK */ |
2017 | |
2018 | static int isblnk(Byte c) // is the char a blank or tab |
2019 | { |
2020 | return (c == ' ' || c == '\t'); |
2021 | } |
2022 | |
2023 | //----- Set terminal attributes -------------------------------- |
2024 | static void rawmode(void) |
2025 | { |
2026 | tcgetattr(0, &term_orig); |
2027 | term_vi = term_orig; |
2028 | term_vi.c_lflag &= (~ICANON & ~ECHO); // leave ISIG ON- allow intr's |
2029 | term_vi.c_iflag &= (~IXON & ~ICRNL); |
2030 | term_vi.c_oflag &= (~ONLCR); |
2031 | term_vi.c_cc[VMIN] = 1; |
2032 | term_vi.c_cc[VTIME] = 0; |
2033 | erase_char = term_vi.c_cc[VERASE]; |
2034 | tcsetattr(0, TCSANOW, &term_vi); |
2035 | } |
2036 | |
2037 | static void cookmode(void) |
2038 | { |
2039 | fflush(stdout); |
2040 | tcsetattr(0, TCSANOW, &term_orig); |
2041 | } |
2042 | |
2043 | //----- Come here when we get a window resize signal --------- |
2044 | #if ENABLE_FEATURE_VI_USE_SIGNALS |
2045 | static void winch_sig(int sig ATTRIBUTE_UNUSED) |
2046 | { |
2047 | signal(SIGWINCH, winch_sig); |
2048 | if (ENABLE_FEATURE_VI_WIN_RESIZE) |
2049 | get_terminal_width_height(0, &columns, &rows); |
2050 | new_screen(rows, columns); // get memory for virtual screen |
2051 | redraw(TRUE); // re-draw the screen |
2052 | } |
2053 | |
2054 | //----- Come here when we get a continue signal ------------------- |
2055 | static void cont_sig(int sig ATTRIBUTE_UNUSED) |
2056 | { |
2057 | rawmode(); // terminal to "raw" |
2058 | last_status_cksum = 0; // force status update |
2059 | redraw(TRUE); // re-draw the screen |
2060 | |
2061 | signal(SIGTSTP, suspend_sig); |
2062 | signal(SIGCONT, SIG_DFL); |
2063 | kill(my_pid, SIGCONT); |
2064 | } |
2065 | |
2066 | //----- Come here when we get a Suspend signal ------------------- |
2067 | static void suspend_sig(int sig ATTRIBUTE_UNUSED) |
2068 | { |
2069 | place_cursor(rows - 1, 0, FALSE); // go to bottom of screen |
2070 | clear_to_eol(); // Erase to end of line |
2071 | cookmode(); // terminal to "cooked" |
2072 | |
2073 | signal(SIGCONT, cont_sig); |
2074 | signal(SIGTSTP, SIG_DFL); |
2075 | kill(my_pid, SIGTSTP); |
2076 | } |
2077 | |
2078 | //----- Come here when we get a signal --------------------------- |
2079 | static void catch_sig(int sig) |
2080 | { |
2081 | signal(SIGINT, catch_sig); |
2082 | if(sig) |
2083 | longjmp(restart, sig); |
2084 | } |
2085 | #endif /* FEATURE_VI_USE_SIGNALS */ |
2086 | |
2087 | static int mysleep(int hund) // sleep for 'h' 1/100 seconds |
2088 | { |
2089 | // Don't hang- Wait 5/100 seconds- 1 Sec= 1000000 |
2090 | fflush(stdout); |
2091 | FD_ZERO(&rfds); |
2092 | FD_SET(0, &rfds); |
2093 | tv.tv_sec = 0; |
2094 | tv.tv_usec = hund * 10000; |
2095 | select(1, &rfds, NULL, NULL, &tv); |
2096 | return FD_ISSET(0, &rfds); |
2097 | } |
2098 | |
2099 | #define readbuffer bb_common_bufsiz1 |
2100 | |
2101 | static int readed_for_parse; |
2102 | |
2103 | //----- IO Routines -------------------------------------------- |
2104 | static Byte readit(void) // read (maybe cursor) key from stdin |
2105 | { |
2106 | Byte c; |
2107 | int n; |
2108 | struct esc_cmds { |
2109 | const char *seq; |
2110 | Byte val; |
2111 | }; |
2112 | |
2113 | static const struct esc_cmds esccmds[] = { |
2114 | {"OA", (Byte) VI_K_UP}, // cursor key Up |
2115 | {"OB", (Byte) VI_K_DOWN}, // cursor key Down |
2116 | {"OC", (Byte) VI_K_RIGHT}, // Cursor Key Right |
2117 | {"OD", (Byte) VI_K_LEFT}, // cursor key Left |
2118 | {"OH", (Byte) VI_K_HOME}, // Cursor Key Home |
2119 | {"OF", (Byte) VI_K_END}, // Cursor Key End |
2120 | {"[A", (Byte) VI_K_UP}, // cursor key Up |
2121 | {"[B", (Byte) VI_K_DOWN}, // cursor key Down |
2122 | {"[C", (Byte) VI_K_RIGHT}, // Cursor Key Right |
2123 | {"[D", (Byte) VI_K_LEFT}, // cursor key Left |
2124 | {"[H", (Byte) VI_K_HOME}, // Cursor Key Home |
2125 | {"[F", (Byte) VI_K_END}, // Cursor Key End |
2126 | {"[1~", (Byte) VI_K_HOME}, // Cursor Key Home |
2127 | {"[2~", (Byte) VI_K_INSERT}, // Cursor Key Insert |
2128 | {"[4~", (Byte) VI_K_END}, // Cursor Key End |
2129 | {"[5~", (Byte) VI_K_PAGEUP}, // Cursor Key Page Up |
2130 | {"[6~", (Byte) VI_K_PAGEDOWN}, // Cursor Key Page Down |
2131 | {"OP", (Byte) VI_K_FUN1}, // Function Key F1 |
2132 | {"OQ", (Byte) VI_K_FUN2}, // Function Key F2 |
2133 | {"OR", (Byte) VI_K_FUN3}, // Function Key F3 |
2134 | {"OS", (Byte) VI_K_FUN4}, // Function Key F4 |
2135 | {"[15~", (Byte) VI_K_FUN5}, // Function Key F5 |
2136 | {"[17~", (Byte) VI_K_FUN6}, // Function Key F6 |
2137 | {"[18~", (Byte) VI_K_FUN7}, // Function Key F7 |
2138 | {"[19~", (Byte) VI_K_FUN8}, // Function Key F8 |
2139 | {"[20~", (Byte) VI_K_FUN9}, // Function Key F9 |
2140 | {"[21~", (Byte) VI_K_FUN10}, // Function Key F10 |
2141 | {"[23~", (Byte) VI_K_FUN11}, // Function Key F11 |
2142 | {"[24~", (Byte) VI_K_FUN12}, // Function Key F12 |
2143 | {"[11~", (Byte) VI_K_FUN1}, // Function Key F1 |
2144 | {"[12~", (Byte) VI_K_FUN2}, // Function Key F2 |
2145 | {"[13~", (Byte) VI_K_FUN3}, // Function Key F3 |
2146 | {"[14~", (Byte) VI_K_FUN4}, // Function Key F4 |
2147 | }; |
2148 | |
2149 | #define ESCCMDS_COUNT (sizeof(esccmds)/sizeof(struct esc_cmds)) |
2150 | |
2151 | (void) alarm(0); // turn alarm OFF while we wait for input |
2152 | fflush(stdout); |
2153 | n = readed_for_parse; |
2154 | // get input from User- are there already input chars in Q? |
2155 | if (n <= 0) { |
2156 | ri0: |
2157 | // the Q is empty, wait for a typed char |
2158 | n = read(0, readbuffer, BUFSIZ - 1); |
2159 | if (n < 0) { |
2160 | if (errno == EINTR) |
2161 | goto ri0; // interrupted sys call |
2162 | if (errno == EBADF) |
2163 | editing = 0; |
2164 | if (errno == EFAULT) |
2165 | editing = 0; |
2166 | if (errno == EINVAL) |
2167 | editing = 0; |
2168 | if (errno == EIO) |
2169 | editing = 0; |
2170 | errno = 0; |
2171 | } |
2172 | if(n <= 0) |
2173 | return 0; // error |
2174 | if (readbuffer[0] == 27) { |
2175 | // This is an ESC char. Is this Esc sequence? |
2176 | // Could be bare Esc key. See if there are any |
2177 | // more chars to read after the ESC. This would |
2178 | // be a Function or Cursor Key sequence. |
2179 | FD_ZERO(&rfds); |
2180 | FD_SET(0, &rfds); |
2181 | tv.tv_sec = 0; |
2182 | tv.tv_usec = 50000; // Wait 5/100 seconds- 1 Sec=1000000 |
2183 | |
2184 | // keep reading while there are input chars and room in buffer |
2185 | while (select(1, &rfds, NULL, NULL, &tv) > 0 && n <= (BUFSIZ - 5)) { |
2186 | // read the rest of the ESC string |
2187 | int r = read(0, (void *) (readbuffer + n), BUFSIZ - n); |
2188 | if (r > 0) { |
2189 | n += r; |
2190 | } |
2191 | } |
2192 | } |
2193 | readed_for_parse = n; |
2194 | } |
2195 | c = readbuffer[0]; |
2196 | if(c == 27 && n > 1) { |
2197 | // Maybe cursor or function key? |
2198 | const struct esc_cmds *eindex; |
2199 | |
2200 | for (eindex = esccmds; eindex < &esccmds[ESCCMDS_COUNT]; eindex++) { |
2201 | int cnt = strlen(eindex->seq); |
2202 | |
2203 | if(n <= cnt) |
2204 | continue; |
2205 | if(strncmp(eindex->seq, (char *) readbuffer + 1, cnt)) |
2206 | continue; |
2207 | // is a Cursor key- put derived value back into Q |
2208 | c = eindex->val; |
2209 | // for squeeze out the ESC sequence |
2210 | n = cnt + 1; |
2211 | break; |
2212 | } |
2213 | if(eindex == &esccmds[ESCCMDS_COUNT]) { |
2214 | /* defined ESC sequence not found, set only one ESC */ |
2215 | n = 1; |
2216 | } |
2217 | } else { |
2218 | n = 1; |
2219 | } |
2220 | // remove key sequence from Q |
2221 | readed_for_parse -= n; |
2222 | memmove(readbuffer, readbuffer + n, BUFSIZ - n); |
2223 | (void) alarm(3); // we are done waiting for input, turn alarm ON |
2224 | return c; |
2225 | } |
2226 | |
2227 | //----- IO Routines -------------------------------------------- |
2228 | static Byte get_one_char(void) |
2229 | { |
2230 | static Byte c; |
2231 | |
2232 | #if ENABLE_FEATURE_VI_DOT_CMD |
2233 | // ! adding2q && ioq == 0 read() |
2234 | // ! adding2q && ioq != 0 *ioq |
2235 | // adding2q *last_modifying_cmd= read() |
2236 | if (!adding2q) { |
2237 | // we are not adding to the q. |
2238 | // but, we may be reading from a q |
2239 | if (ioq == 0) { |
2240 | // there is no current q, read from STDIN |
2241 | c = readit(); // get the users input |
2242 | } else { |
2243 | // there is a queue to get chars from first |
2244 | c = *ioq++; |
2245 | if (c == '\0') { |
2246 | // the end of the q, read from STDIN |
2247 | free(ioq_start); |
2248 | ioq_start = ioq = 0; |
2249 | c = readit(); // get the users input |
2250 | } |
2251 | } |
2252 | } else { |
2253 | // adding STDIN chars to q |
2254 | c = readit(); // get the users input |
2255 | if (last_modifying_cmd != 0) { |
2256 | int len = strlen((char *) last_modifying_cmd); |
2257 | if (len + 1 >= BUFSIZ) { |
2258 | psbs("last_modifying_cmd overrun"); |
2259 | } else { |
2260 | // add new char to q |
2261 | last_modifying_cmd[len] = c; |
2262 | } |
2263 | } |
2264 | } |
2265 | #else |
2266 | c = readit(); // get the users input |
2267 | #endif /* FEATURE_VI_DOT_CMD */ |
2268 | return c; // return the char, where ever it came from |
2269 | } |
2270 | |
2271 | static Byte *get_input_line(Byte * prompt) // get input line- use "status line" |
2272 | { |
2273 | Byte buf[BUFSIZ]; |
2274 | Byte c; |
2275 | int i; |
2276 | static Byte *obufp = NULL; |
2277 | |
2278 | strcpy((char *) buf, (char *) prompt); |
2279 | last_status_cksum = 0; // force status update |
2280 | place_cursor(rows - 1, 0, FALSE); // go to Status line, bottom of screen |
2281 | clear_to_eol(); // clear the line |
2282 | write1((char *) prompt); // write out the :, /, or ? prompt |
2283 | |
2284 | for (i = strlen((char *) buf); i < BUFSIZ;) { |
2285 | c = get_one_char(); // read user input |
2286 | if (c == '\n' || c == '\r' || c == 27) |
2287 | break; // is this end of input |
2288 | if (c == erase_char || c == 8 || c == 127) { |
2289 | // user wants to erase prev char |
2290 | i--; // backup to prev char |
2291 | buf[i] = '\0'; // erase the char |
2292 | buf[i + 1] = '\0'; // null terminate buffer |
2293 | write1("\b \b"); // erase char on screen |
2294 | if (i <= 0) { // user backs up before b-o-l, exit |
2295 | break; |
2296 | } |
2297 | } else { |
2298 | buf[i] = c; // save char in buffer |
2299 | buf[i + 1] = '\0'; // make sure buffer is null terminated |
2300 | putchar(c); // echo the char back to user |
2301 | i++; |
2302 | } |
2303 | } |
2304 | refresh(FALSE); |
2305 | free(obufp); |
2306 | obufp = (Byte *) xstrdup((char *) buf); |
2307 | return obufp; |
2308 | } |
2309 | |
2310 | static int file_size(const Byte * fn) // what is the byte size of "fn" |
2311 | { |
2312 | struct stat st_buf; |
2313 | int cnt, sr; |
2314 | |
2315 | if (fn == 0 || strlen((char *)fn) <= 0) |
2316 | return -1; |
2317 | cnt = -1; |
2318 | sr = stat((char *) fn, &st_buf); // see if file exists |
2319 | if (sr >= 0) { |
2320 | cnt = (int) st_buf.st_size; |
2321 | } |
2322 | return cnt; |
2323 | } |
2324 | |
2325 | static int file_insert(Byte * fn, Byte * p, int size) |
2326 | { |
2327 | int fd, cnt; |
2328 | |
2329 | cnt = -1; |
2330 | #if ENABLE_FEATURE_VI_READONLY |
2331 | readonly = FALSE; |
2332 | #endif |
2333 | if (fn == 0 || strlen((char*) fn) <= 0) { |
2334 | psbs("No filename given"); |
2335 | goto fi0; |
2336 | } |
2337 | if (size == 0) { |
2338 | // OK- this is just a no-op |
2339 | cnt = 0; |
2340 | goto fi0; |
2341 | } |
2342 | if (size < 0) { |
2343 | psbs("Trying to insert a negative number (%d) of characters", size); |
2344 | goto fi0; |
2345 | } |
2346 | if (p < text || p > end) { |
2347 | psbs("Trying to insert file outside of memory"); |
2348 | goto fi0; |
2349 | } |
2350 | |
2351 | // see if we can open the file |
2352 | #if ENABLE_FEATURE_VI_READONLY |
2353 | if (vi_readonly) goto fi1; // do not try write-mode |
2354 | #endif |
2355 | fd = open((char *) fn, O_RDWR); // assume read & write |
2356 | if (fd < 0) { |
2357 | // could not open for writing- maybe file is read only |
2358 | #if ENABLE_FEATURE_VI_READONLY |
2359 | fi1: |
2360 | #endif |
2361 | fd = open((char *) fn, O_RDONLY); // try read-only |
2362 | if (fd < 0) { |
2363 | psbs("\"%s\" %s", fn, "cannot open file"); |
2364 | goto fi0; |
2365 | } |
2366 | #if ENABLE_FEATURE_VI_READONLY |
2367 | // got the file- read-only |
2368 | readonly = TRUE; |
2369 | #endif |
2370 | } |
2371 | p = text_hole_make(p, size); |
2372 | cnt = read(fd, p, size); |
2373 | close(fd); |
2374 | if (cnt < 0) { |
2375 | cnt = -1; |
2376 | p = text_hole_delete(p, p + size - 1); // un-do buffer insert |
2377 | psbs("cannot read file \"%s\"", fn); |
2378 | } else if (cnt < size) { |
2379 | // There was a partial read, shrink unused space text[] |
2380 | p = text_hole_delete(p + cnt, p + (size - cnt) - 1); // un-do buffer insert |
2381 | psbs("cannot read all of file \"%s\"", fn); |
2382 | } |
2383 | if (cnt >= size) |
2384 | file_modified++; |
2385 | fi0: |
2386 | return cnt; |
2387 | } |
2388 | |
2389 | static int file_write(Byte * fn, Byte * first, Byte * last) |
2390 | { |
2391 | int fd, cnt, charcnt; |
2392 | |
2393 | if (fn == 0) { |
2394 | psbs("No current filename"); |
2395 | return -2; |
2396 | } |
2397 | charcnt = 0; |
2398 | // FIXIT- use the correct umask() |
2399 | fd = open((char *) fn, (O_WRONLY | O_CREAT | O_TRUNC), 0664); |
2400 | if (fd < 0) |
2401 | return -1; |
2402 | cnt = last - first + 1; |
2403 | charcnt = write(fd, first, cnt); |
2404 | if (charcnt == cnt) { |
2405 | // good write |
2406 | //file_modified= FALSE; // the file has not been modified |
2407 | } else { |
2408 | charcnt = 0; |
2409 | } |
2410 | close(fd); |
2411 | return charcnt; |
2412 | } |
2413 | |
2414 | //----- Terminal Drawing --------------------------------------- |
2415 | // The terminal is made up of 'rows' line of 'columns' columns. |
2416 | // classically this would be 24 x 80. |
2417 | // screen coordinates |
2418 | // 0,0 ... 0,79 |
2419 | // 1,0 ... 1,79 |
2420 | // . ... . |
2421 | // . ... . |
2422 | // 22,0 ... 22,79 |
2423 | // 23,0 ... 23,79 status line |
2424 | // |
2425 | |
2426 | //----- Move the cursor to row x col (count from 0, not 1) ------- |
2427 | static void place_cursor(int row, int col, int opti) |
2428 | { |
2429 | char cm1[BUFSIZ]; |
2430 | char *cm; |
2431 | #if ENABLE_FEATURE_VI_OPTIMIZE_CURSOR |
2432 | char cm2[BUFSIZ]; |
2433 | Byte *screenp; |
2434 | // char cm3[BUFSIZ]; |
2435 | int Rrow= last_row; |
2436 | #endif |
2437 | |
2438 | memset(cm1, '\0', BUFSIZ - 1); // clear the buffer |
2439 | |
2440 | if (row < 0) row = 0; |
2441 | if (row >= rows) row = rows - 1; |
2442 | if (col < 0) col = 0; |
2443 | if (col >= columns) col = columns - 1; |
2444 | |
2445 | //----- 1. Try the standard terminal ESC sequence |
2446 | sprintf((char *) cm1, CMrc, row + 1, col + 1); |
2447 | cm= cm1; |
2448 | if (! opti) goto pc0; |
2449 | |
2450 | #if ENABLE_FEATURE_VI_OPTIMIZE_CURSOR |
2451 | //----- find the minimum # of chars to move cursor ------------- |
2452 | //----- 2. Try moving with discreet chars (Newline, [back]space, ...) |
2453 | memset(cm2, '\0', BUFSIZ - 1); // clear the buffer |
2454 | |
2455 | // move to the correct row |
2456 | while (row < Rrow) { |
2457 | // the cursor has to move up |
2458 | strcat(cm2, CMup); |
2459 | Rrow--; |
2460 | } |
2461 | while (row > Rrow) { |
2462 | // the cursor has to move down |
2463 | strcat(cm2, CMdown); |
2464 | Rrow++; |
2465 | } |
2466 | |
2467 | // now move to the correct column |
2468 | strcat(cm2, "\r"); // start at col 0 |
2469 | // just send out orignal source char to get to correct place |
2470 | screenp = &screen[row * columns]; // start of screen line |
2471 | strncat(cm2, (char* )screenp, col); |
2472 | |
2473 | //----- 3. Try some other way of moving cursor |
2474 | //--------------------------------------------- |
2475 | |
2476 | // pick the shortest cursor motion to send out |
2477 | cm= cm1; |
2478 | if (strlen(cm2) < strlen(cm)) { |
2479 | cm= cm2; |
2480 | } /* else if (strlen(cm3) < strlen(cm)) { |
2481 | cm= cm3; |
2482 | } */ |
2483 | #endif /* FEATURE_VI_OPTIMIZE_CURSOR */ |
2484 | pc0: |
2485 | write1(cm); // move the cursor |
2486 | } |
2487 | |
2488 | //----- Erase from cursor to end of line ----------------------- |
2489 | static void clear_to_eol(void) |
2490 | { |
2491 | write1(Ceol); // Erase from cursor to end of line |
2492 | } |
2493 | |
2494 | //----- Erase from cursor to end of screen ----------------------- |
2495 | static void clear_to_eos(void) |
2496 | { |
2497 | write1(Ceos); // Erase from cursor to end of screen |
2498 | } |
2499 | |
2500 | //----- Start standout mode ------------------------------------ |
2501 | static void standout_start(void) // send "start reverse video" sequence |
2502 | { |
2503 | write1(SOs); // Start reverse video mode |
2504 | } |
2505 | |
2506 | //----- End standout mode -------------------------------------- |
2507 | static void standout_end(void) // send "end reverse video" sequence |
2508 | { |
2509 | write1(SOn); // End reverse video mode |
2510 | } |
2511 | |
2512 | //----- Flash the screen -------------------------------------- |
2513 | static void flash(int h) |
2514 | { |
2515 | standout_start(); // send "start reverse video" sequence |
2516 | redraw(TRUE); |
2517 | (void) mysleep(h); |
2518 | standout_end(); // send "end reverse video" sequence |
2519 | redraw(TRUE); |
2520 | } |
2521 | |
2522 | static void Indicate_Error(void) |
2523 | { |
2524 | #if ENABLE_FEATURE_VI_CRASHME |
2525 | if (crashme > 0) |
2526 | return; // generate a random command |
2527 | #endif |
2528 | if (!err_method) { |
2529 | write1(bell); // send out a bell character |
2530 | } else { |
2531 | flash(10); |
2532 | } |
2533 | } |
2534 | |
2535 | //----- Screen[] Routines -------------------------------------- |
2536 | //----- Erase the Screen[] memory ------------------------------ |
2537 | static void screen_erase(void) |
2538 | { |
2539 | memset(screen, ' ', screensize); // clear new screen |
2540 | } |
2541 | |
2542 | static int bufsum(unsigned char *buf, int count) |
2543 | { |
2544 | int sum = 0; |
2545 | unsigned char *e = buf + count; |
2546 | while (buf < e) |
2547 | sum += *buf++; |
2548 | return sum; |
2549 | } |
2550 | |
2551 | //----- Draw the status line at bottom of the screen ------------- |
2552 | static void show_status_line(void) |
2553 | { |
2554 | int cnt = 0, cksum = 0; |
2555 | |
2556 | // either we already have an error or status message, or we |
2557 | // create one. |
2558 | if (!have_status_msg) { |
2559 | cnt = format_edit_status(); |
2560 | cksum = bufsum(status_buffer, cnt); |
2561 | } |
2562 | if (have_status_msg || ((cnt > 0 && last_status_cksum != cksum))) { |
2563 | last_status_cksum= cksum; // remember if we have seen this line |
2564 | place_cursor(rows - 1, 0, FALSE); // put cursor on status line |
2565 | write1((char*)status_buffer); |
2566 | clear_to_eol(); |
2567 | if (have_status_msg) { |
2568 | if (((int)strlen((char*)status_buffer) - (have_status_msg - 1)) > |
2569 | (columns - 1) ) { |
2570 | have_status_msg = 0; |
2571 | Hit_Return(); |
2572 | } |
2573 | have_status_msg = 0; |
2574 | } |
2575 | place_cursor(crow, ccol, FALSE); // put cursor back in correct place |
2576 | } |
2577 | fflush(stdout); |
2578 | } |
2579 | |
2580 | //----- format the status buffer, the bottom line of screen ------ |
2581 | // format status buffer, with STANDOUT mode |
2582 | static void psbs(const char *format, ...) |
2583 | { |
2584 | va_list args; |
2585 | |
2586 | va_start(args, format); |
2587 | strcpy((char *) status_buffer, SOs); // Terminal standout mode on |
2588 | vsprintf((char *) status_buffer + strlen((char *) status_buffer), format, args); |
2589 | strcat((char *) status_buffer, SOn); // Terminal standout mode off |
2590 | va_end(args); |
2591 | |
2592 | have_status_msg = 1 + sizeof(SOs) + sizeof(SOn) - 2; |
2593 | |
2594 | return; |
2595 | } |
2596 | |
2597 | // format status buffer |
2598 | static void psb(const char *format, ...) |
2599 | { |
2600 | va_list args; |
2601 | |
2602 | va_start(args, format); |
2603 | vsprintf((char *) status_buffer, format, args); |
2604 | va_end(args); |
2605 | |
2606 | have_status_msg = 1; |
2607 | |
2608 | return; |
2609 | } |
2610 | |
2611 | static void ni(Byte * s) // display messages |
2612 | { |
2613 | Byte buf[BUFSIZ]; |
2614 | |
2615 | print_literal(buf, s); |
2616 | psbs("\'%s\' is not implemented", buf); |
2617 | } |
2618 | |
2619 | static int format_edit_status(void) // show file status on status line |
2620 | { |
2621 | int cur, percent, ret, trunc_at; |
2622 | static int tot; |
2623 | |
2624 | // file_modified is now a counter rather than a flag. this |
2625 | // helps reduce the amount of line counting we need to do. |
2626 | // (this will cause a mis-reporting of modified status |
2627 | // once every MAXINT editing operations.) |
2628 | |
2629 | // it would be nice to do a similar optimization here -- if |
2630 | // we haven't done a motion that could have changed which line |
2631 | // we're on, then we shouldn't have to do this count_lines() |
2632 | cur = count_lines(text, dot); |
2633 | |
2634 | // reduce counting -- the total lines can't have |
2635 | // changed if we haven't done any edits. |
2636 | if (file_modified != last_file_modified) { |
2637 | tot = cur + count_lines(dot, end - 1) - 1; |
2638 | last_file_modified = file_modified; |
2639 | } |
2640 | |
2641 | // current line percent |
2642 | // ------------- ~~ ---------- |
2643 | // total lines 100 |
2644 | if (tot > 0) { |
2645 | percent = (100 * cur) / tot; |
2646 | } else { |
2647 | cur = tot = 0; |
2648 | percent = 100; |
2649 | } |
2650 | |
2651 | trunc_at = columns < STATUS_BUFFER_LEN-1 ? |
2652 | columns : STATUS_BUFFER_LEN-1; |
2653 | |
2654 | ret = snprintf((char *) status_buffer, trunc_at+1, |
2655 | #if ENABLE_FEATURE_VI_READONLY |
2656 | "%c %s%s%s %d/%d %d%%", |
2657 | #else |
2658 | "%c %s%s %d/%d %d%%", |
2659 | #endif |
2660 | (cmd_mode ? (cmd_mode == 2 ? 'R':'I'):'-'), |
2661 | (cfn != 0 ? (char *) cfn : "No file"), |
2662 | #if ENABLE_FEATURE_VI_READONLY |
2663 | ((vi_readonly || readonly) ? " [Read-only]" : ""), |
2664 | #endif |
2665 | (file_modified ? " [modified]" : ""), |
2666 | cur, tot, percent); |
2667 | |
2668 | if (ret >= 0 && ret < trunc_at) |
2669 | return ret; /* it all fit */ |
2670 | |
2671 | return trunc_at; /* had to truncate */ |
2672 | } |
2673 | |
2674 | //----- Force refresh of all Lines ----------------------------- |
2675 | static void redraw(int full_screen) |
2676 | { |
2677 | place_cursor(0, 0, FALSE); // put cursor in correct place |
2678 | clear_to_eos(); // tel terminal to erase display |
2679 | screen_erase(); // erase the internal screen buffer |
2680 | last_status_cksum = 0; // force status update |
2681 | refresh(full_screen); // this will redraw the entire display |
2682 | show_status_line(); |
2683 | } |
2684 | |
2685 | //----- Format a text[] line into a buffer --------------------- |
2686 | static void format_line(Byte *dest, Byte *src, int li) |
2687 | { |
2688 | int co; |
2689 | Byte c; |
2690 | |
2691 | for (co= 0; co < MAX_SCR_COLS; co++) { |
2692 | c= ' '; // assume blank |
2693 | if (li > 0 && co == 0) { |
2694 | c = '~'; // not first line, assume Tilde |
2695 | } |
2696 | // are there chars in text[] and have we gone past the end |
2697 | if (text < end && src < end) { |
2698 | c = *src++; |
2699 | } |
2700 | if (c == '\n') |
2701 | break; |
2702 | if (c > 127 && !Isprint(c)) { |
2703 | c = '.'; |
2704 | } |
2705 | if (c < ' ' || c == 127) { |
2706 | if (c == '\t') { |
2707 | c = ' '; |
2708 | // co % 8 != 7 |
2709 | for (; (co % tabstop) != (tabstop - 1); co++) { |
2710 | dest[co] = c; |
2711 | } |
2712 | } else { |
2713 | dest[co++] = '^'; |
2714 | if(c == 127) |
2715 | c = '?'; |
2716 | else |
2717 | c += '@'; // make it visible |
2718 | } |
2719 | } |
2720 | // the co++ is done here so that the column will |
2721 | // not be overwritten when we blank-out the rest of line |
2722 | dest[co] = c; |
2723 | if (src >= end) |
2724 | break; |
2725 | } |
2726 | } |
2727 | |
2728 | //----- Refresh the changed screen lines ----------------------- |
2729 | // Copy the source line from text[] into the buffer and note |
2730 | // if the current screenline is different from the new buffer. |
2731 | // If they differ then that line needs redrawing on the terminal. |
2732 | // |
2733 | static void refresh(int full_screen) |
2734 | { |
2735 | static int old_offset; |
2736 | int li, changed; |
2737 | Byte buf[MAX_SCR_COLS]; |
2738 | Byte *tp, *sp; // pointer into text[] and screen[] |
2739 | #if ENABLE_FEATURE_VI_OPTIMIZE_CURSOR |
2740 | int last_li= -2; // last line that changed- for optimizing cursor movement |
2741 | #endif |
2742 | |
2743 | if (ENABLE_FEATURE_VI_WIN_RESIZE) |
2744 | get_terminal_width_height(0, &columns, &rows); |
2745 | sync_cursor(dot, &crow, &ccol); // where cursor will be (on "dot") |
2746 | tp = screenbegin; // index into text[] of top line |
2747 | |
2748 | // compare text[] to screen[] and mark screen[] lines that need updating |
2749 | for (li = 0; li < rows - 1; li++) { |
2750 | int cs, ce; // column start & end |
2751 | memset(buf, ' ', MAX_SCR_COLS); // blank-out the buffer |
2752 | buf[MAX_SCR_COLS-1] = 0; // NULL terminate the buffer |
2753 | // format current text line into buf |
2754 | format_line(buf, tp, li); |
2755 | |
2756 | // skip to the end of the current text[] line |
2757 | while (tp < end && *tp++ != '\n') /*no-op*/ ; |
2758 | |
2759 | // see if there are any changes between vitual screen and buf |
2760 | changed = FALSE; // assume no change |
2761 | cs= 0; |
2762 | ce= columns-1; |
2763 | sp = &screen[li * columns]; // start of screen line |
2764 | if (full_screen) { |
2765 | // force re-draw of every single column from 0 - columns-1 |
2766 | goto re0; |
2767 | } |
2768 | // compare newly formatted buffer with virtual screen |
2769 | // look forward for first difference between buf and screen |
2770 | for ( ; cs <= ce; cs++) { |
2771 | if (buf[cs + offset] != sp[cs]) { |
2772 | changed = TRUE; // mark for redraw |
2773 | break; |
2774 | } |
2775 | } |
2776 | |
2777 | // look backward for last difference between buf and screen |
2778 | for ( ; ce >= cs; ce--) { |
2779 | if (buf[ce + offset] != sp[ce]) { |
2780 | changed = TRUE; // mark for redraw |
2781 | break; |
2782 | } |
2783 | } |
2784 | // now, cs is index of first diff, and ce is index of last diff |
2785 | |
2786 | // if horz offset has changed, force a redraw |
2787 | if (offset != old_offset) { |
2788 | re0: |
2789 | changed = TRUE; |
2790 | } |
2791 | |
2792 | // make a sanity check of columns indexes |
2793 | if (cs < 0) cs= 0; |
2794 | if (ce > columns-1) ce= columns-1; |
2795 | if (cs > ce) { cs= 0; ce= columns-1; } |
2796 | // is there a change between vitual screen and buf |
2797 | if (changed) { |
2798 | // copy changed part of buffer to virtual screen |
2799 | memmove(sp+cs, buf+(cs+offset), ce-cs+1); |
2800 | |
2801 | // move cursor to column of first change |
2802 | if (offset != old_offset) { |
2803 | // opti_cur_move is still too stupid |
2804 | // to handle offsets correctly |
2805 | place_cursor(li, cs, FALSE); |
2806 | } else { |
2807 | #if ENABLE_FEATURE_VI_OPTIMIZE_CURSOR |
2808 | // if this just the next line |
2809 | // try to optimize cursor movement |
2810 | // otherwise, use standard ESC sequence |
2811 | place_cursor(li, cs, li == (last_li+1) ? TRUE : FALSE); |
2812 | last_li= li; |
2813 | #else |
2814 | place_cursor(li, cs, FALSE); // use standard ESC sequence |
2815 | #endif /* FEATURE_VI_OPTIMIZE_CURSOR */ |
2816 | } |
2817 | |
2818 | // write line out to terminal |
2819 | { |
2820 | int nic = ce-cs+1; |
2821 | char *out = (char*)sp+cs; |
2822 | |
2823 | while (nic-- > 0) { |
2824 | putchar(*out); |
2825 | out++; |
2826 | } |
2827 | } |
2828 | #if ENABLE_FEATURE_VI_OPTIMIZE_CURSOR |
2829 | last_row = li; |
2830 | #endif |
2831 | } |
2832 | } |
2833 | |
2834 | #if ENABLE_FEATURE_VI_OPTIMIZE_CURSOR |
2835 | place_cursor(crow, ccol, (crow == last_row) ? TRUE : FALSE); |
2836 | last_row = crow; |
2837 | #else |
2838 | place_cursor(crow, ccol, FALSE); |
2839 | #endif |
2840 | |
2841 | if (offset != old_offset) |
2842 | old_offset = offset; |
2843 | } |
2844 | |
2845 | //--------------------------------------------------------------------- |
2846 | //----- the Ascii Chart ----------------------------------------------- |
2847 | // |
2848 | // 00 nul 01 soh 02 stx 03 etx 04 eot 05 enq 06 ack 07 bel |
2849 | // 08 bs 09 ht 0a nl 0b vt 0c np 0d cr 0e so 0f si |
2850 | // 10 dle 11 dc1 12 dc2 13 dc3 14 dc4 15 nak 16 syn 17 etb |
2851 | // 18 can 19 em 1a sub 1b esc 1c fs 1d gs 1e rs 1f us |
2852 | // 20 sp 21 ! 22 " 23 # 24 $ 25 % 26 & 27 ' |
2853 | // 28 ( 29 ) 2a * 2b + 2c , 2d - 2e . 2f / |
2854 | // 30 0 31 1 32 2 33 3 34 4 35 5 36 6 37 7 |
2855 | // 38 8 39 9 3a : 3b ; 3c < 3d = 3e > 3f ? |
2856 | // 40 @ 41 A 42 B 43 C 44 D 45 E 46 F 47 G |
2857 | // 48 H 49 I 4a J 4b K 4c L 4d M 4e N 4f O |
2858 | // 50 P 51 Q 52 R 53 S 54 T 55 U 56 V 57 W |
2859 | // 58 X 59 Y 5a Z 5b [ 5c \ 5d ] 5e ^ 5f _ |
2860 | // 60 ` 61 a 62 b 63 c 64 d 65 e 66 f 67 g |
2861 | // 68 h 69 i 6a j 6b k 6c l 6d m 6e n 6f o |
2862 | // 70 p 71 q 72 r 73 s 74 t 75 u 76 v 77 w |
2863 | // 78 x 79 y 7a z 7b { 7c | 7d } 7e ~ 7f del |
2864 | //--------------------------------------------------------------------- |
2865 | |
2866 | //----- Execute a Vi Command ----------------------------------- |
2867 | static void do_cmd(Byte c) |
2868 | { |
2869 | Byte c1, *p, *q, *msg, buf[9], *save_dot; |
2870 | int cnt, i, j, dir, yf; |
2871 | |
2872 | c1 = c; // quiet the compiler |
2873 | cnt = yf = dir = 0; // quiet the compiler |
2874 | p = q = save_dot = msg = buf; // quiet the compiler |
2875 | memset(buf, '\0', 9); // clear buf |
2876 | |
2877 | show_status_line(); |
2878 | |
2879 | /* if this is a cursor key, skip these checks */ |
2880 | switch (c) { |
2881 | case VI_K_UP: |
2882 | case VI_K_DOWN: |
2883 | case VI_K_LEFT: |
2884 | case VI_K_RIGHT: |
2885 | case VI_K_HOME: |
2886 | case VI_K_END: |
2887 | case VI_K_PAGEUP: |
2888 | case VI_K_PAGEDOWN: |
2889 | goto key_cmd_mode; |
2890 | } |
2891 | |
2892 | if (cmd_mode == 2) { |
2893 | // flip-flop Insert/Replace mode |
2894 | if (c == VI_K_INSERT) goto dc_i; |
2895 | // we are 'R'eplacing the current *dot with new char |
2896 | if (*dot == '\n') { |
2897 | // don't Replace past E-o-l |
2898 | cmd_mode = 1; // convert to insert |
2899 | } else { |
2900 | if (1 <= c || Isprint(c)) { |
2901 | if (c != 27) |
2902 | dot = yank_delete(dot, dot, 0, YANKDEL); // delete char |
2903 | dot = char_insert(dot, c); // insert new char |
2904 | } |
2905 | goto dc1; |
2906 | } |
2907 | } |
2908 | if (cmd_mode == 1) { |
2909 | // hitting "Insert" twice means "R" replace mode |
2910 | if (c == VI_K_INSERT) goto dc5; |
2911 | // insert the char c at "dot" |
2912 | if (1 <= c || Isprint(c)) { |
2913 | dot = char_insert(dot, c); |
2914 | } |
2915 | goto dc1; |
2916 | } |
2917 | |
2918 | key_cmd_mode: |
2919 | switch (c) { |
2920 | //case 0x01: // soh |
2921 | //case 0x09: // ht |
2922 | //case 0x0b: // vt |
2923 | //case 0x0e: // so |
2924 | //case 0x0f: // si |
2925 | //case 0x10: // dle |
2926 | //case 0x11: // dc1 |
2927 | //case 0x13: // dc3 |
2928 | #if ENABLE_FEATURE_VI_CRASHME |
2929 | case 0x14: // dc4 ctrl-T |
2930 | crashme = (crashme == 0) ? 1 : 0; |
2931 | break; |
2932 | #endif |
2933 | //case 0x16: // syn |
2934 | //case 0x17: // etb |
2935 | //case 0x18: // can |
2936 | //case 0x1c: // fs |
2937 | //case 0x1d: // gs |
2938 | //case 0x1e: // rs |
2939 | //case 0x1f: // us |
2940 | //case '!': // !- |
2941 | //case '#': // #- |
2942 | //case '&': // &- |
2943 | //case '(': // (- |
2944 | //case ')': // )- |
2945 | //case '*': // *- |
2946 | //case ',': // ,- |
2947 | //case '=': // =- |
2948 | //case '@': // @- |
2949 | //case 'F': // F- |
2950 | //case 'K': // K- |
2951 | //case 'Q': // Q- |
2952 | //case 'S': // S- |
2953 | //case 'T': // T- |
2954 | //case 'V': // V- |
2955 | //case '[': // [- |
2956 | //case '\\': // \- |
2957 | //case ']': // ]- |
2958 | //case '_': // _- |
2959 | //case '`': // `- |
2960 | //case 'g': // g- |
2961 | //case 'u': // u- FIXME- there is no undo |
2962 | //case 'v': // v- |
2963 | default: // unrecognised command |
2964 | buf[0] = c; |
2965 | buf[1] = '\0'; |
2966 | if (c < ' ') { |
2967 | buf[0] = '^'; |
2968 | buf[1] = c + '@'; |
2969 | buf[2] = '\0'; |
2970 | } |
2971 | ni((Byte *) buf); |
2972 | end_cmd_q(); // stop adding to q |
2973 | case 0x00: // nul- ignore |
2974 | break; |
2975 | case 2: // ctrl-B scroll up full screen |
2976 | case VI_K_PAGEUP: // Cursor Key Page Up |
2977 | dot_scroll(rows - 2, -1); |
2978 | break; |
2979 | #if ENABLE_FEATURE_VI_USE_SIGNALS |
2980 | case 0x03: // ctrl-C interrupt |
2981 | longjmp(restart, 1); |
2982 | break; |
2983 | case 26: // ctrl-Z suspend |
2984 | suspend_sig(SIGTSTP); |
2985 | break; |
2986 | #endif |
2987 | case 4: // ctrl-D scroll down half screen |
2988 | dot_scroll((rows - 2) / 2, 1); |
2989 | break; |
2990 | case 5: // ctrl-E scroll down one line |
2991 | dot_scroll(1, 1); |
2992 | break; |
2993 | case 6: // ctrl-F scroll down full screen |
2994 | case VI_K_PAGEDOWN: // Cursor Key Page Down |
2995 | dot_scroll(rows - 2, 1); |
2996 | break; |
2997 | case 7: // ctrl-G show current status |
2998 | last_status_cksum = 0; // force status update |
2999 | break; |
3000 | case 'h': // h- move left |
3001 | case VI_K_LEFT: // cursor key Left |
3002 | case 8: // ctrl-H- move left (This may be ERASE char) |
3003 | case 127: // DEL- move left (This may be ERASE char) |
3004 | if (cmdcnt-- > 1) { |
3005 | do_cmd(c); |
3006 | } // repeat cnt |
3007 | dot_left(); |
3008 | break; |
3009 | case 10: // Newline ^J |
3010 | case 'j': // j- goto next line, same col |
3011 | case VI_K_DOWN: // cursor key Down |
3012 | if (cmdcnt-- > 1) { |
3013 | do_cmd(c); |
3014 | } // repeat cnt |
3015 | dot_next(); // go to next B-o-l |
3016 | dot = move_to_col(dot, ccol + offset); // try stay in same col |
3017 | break; |
3018 | case 12: // ctrl-L force redraw whole screen |
3019 | case 18: // ctrl-R force redraw |
3020 | place_cursor(0, 0, FALSE); // put cursor in correct place |
3021 | clear_to_eos(); // tel terminal to erase display |
3022 | (void) mysleep(10); |
3023 | screen_erase(); // erase the internal screen buffer |
3024 | last_status_cksum = 0; // force status update |
3025 | refresh(TRUE); // this will redraw the entire display |
3026 | break; |
3027 | case 13: // Carriage Return ^M |
3028 | case '+': // +- goto next line |
3029 | if (cmdcnt-- > 1) { |
3030 | do_cmd(c); |
3031 | } // repeat cnt |
3032 | dot_next(); |
3033 | dot_skip_over_ws(); |
3034 | break; |
3035 | case 21: // ctrl-U scroll up half screen |
3036 | dot_scroll((rows - 2) / 2, -1); |
3037 | break; |
3038 | case 25: // ctrl-Y scroll up one line |
3039 | dot_scroll(1, -1); |
3040 | break; |
3041 | case 27: // esc |
3042 | if (cmd_mode == 0) |
3043 | indicate_error(c); |
3044 | cmd_mode = 0; // stop insrting |
3045 | end_cmd_q(); |
3046 | last_status_cksum = 0; // force status update |
3047 | break; |
3048 | case ' ': // move right |
3049 | case 'l': // move right |
3050 | case VI_K_RIGHT: // Cursor Key Right |
3051 | if (cmdcnt-- > 1) { |
3052 | do_cmd(c); |
3053 | } // repeat cnt |
3054 | dot_right(); |
3055 | break; |
3056 | #if ENABLE_FEATURE_VI_YANKMARK |
3057 | case '"': // "- name a register to use for Delete/Yank |
3058 | c1 = get_one_char(); |
3059 | c1 = tolower(c1); |
3060 | if (islower(c1)) { |
3061 | YDreg = c1 - 'a'; |
3062 | } else { |
3063 | indicate_error(c); |
3064 | } |
3065 | break; |
3066 | case '\'': // '- goto a specific mark |
3067 | c1 = get_one_char(); |
3068 | c1 = tolower(c1); |
3069 | if (islower(c1)) { |
3070 | c1 = c1 - 'a'; |
3071 | // get the b-o-l |
3072 | q = mark[(int) c1]; |
3073 | if (text <= q && q < end) { |
3074 | dot = q; |
3075 | dot_begin(); // go to B-o-l |
3076 | dot_skip_over_ws(); |
3077 | } |
3078 | } else if (c1 == '\'') { // goto previous context |
3079 | dot = swap_context(dot); // swap current and previous context |
3080 | dot_begin(); // go to B-o-l |
3081 | dot_skip_over_ws(); |
3082 | } else { |
3083 | indicate_error(c); |
3084 | } |
3085 | break; |
3086 | case 'm': // m- Mark a line |
3087 | // this is really stupid. If there are any inserts or deletes |
3088 | // between text[0] and dot then this mark will not point to the |
3089 | // correct location! It could be off by many lines! |
3090 | // Well..., at least its quick and dirty. |
3091 | c1 = get_one_char(); |
3092 | c1 = tolower(c1); |
3093 | if (islower(c1)) { |
3094 | c1 = c1 - 'a'; |
3095 | // remember the line |
3096 | mark[(int) c1] = dot; |
3097 | } else { |
3098 | indicate_error(c); |
3099 | } |
3100 | break; |
3101 | case 'P': // P- Put register before |
3102 | case 'p': // p- put register after |
3103 | p = reg[YDreg]; |
3104 | if (p == 0) { |
3105 | psbs("Nothing in register %c", what_reg()); |
3106 | break; |
3107 | } |
3108 | // are we putting whole lines or strings |
3109 | if (strchr((char *) p, '\n') != NULL) { |
3110 | if (c == 'P') { |
3111 | dot_begin(); // putting lines- Put above |
3112 | } |
3113 | if (c == 'p') { |
3114 | // are we putting after very last line? |
3115 | if (end_line(dot) == (end - 1)) { |
3116 | dot = end; // force dot to end of text[] |
3117 | } else { |
3118 | dot_next(); // next line, then put before |
3119 | } |
3120 | } |
3121 | } else { |
3122 | if (c == 'p') |
3123 | dot_right(); // move to right, can move to NL |
3124 | } |
3125 | dot = string_insert(dot, p); // insert the string |
3126 | end_cmd_q(); // stop adding to q |
3127 | break; |
3128 | case 'U': // U- Undo; replace current line with original version |
3129 | if (reg[Ureg] != 0) { |
3130 | p = begin_line(dot); |
3131 | q = end_line(dot); |
3132 | p = text_hole_delete(p, q); // delete cur line |
3133 | p = string_insert(p, reg[Ureg]); // insert orig line |
3134 | dot = p; |
3135 | dot_skip_over_ws(); |
3136 | } |
3137 | break; |
3138 | #endif /* FEATURE_VI_YANKMARK */ |
3139 | case '$': // $- goto end of line |
3140 | case VI_K_END: // Cursor Key End |
3141 | if (cmdcnt-- > 1) { |
3142 | do_cmd(c); |
3143 | } // repeat cnt |
3144 | dot = end_line(dot); |
3145 | break; |
3146 | case '%': // %- find matching char of pair () [] {} |
3147 | for (q = dot; q < end && *q != '\n'; q++) { |
3148 | if (strchr("()[]{}", *q) != NULL) { |
3149 | // we found half of a pair |
3150 | p = find_pair(q, *q); |
3151 | if (p == NULL) { |
3152 | indicate_error(c); |
3153 | } else { |
3154 | dot = p; |
3155 | } |
3156 | break; |
3157 | } |
3158 | } |
3159 | if (*q == '\n') |
3160 | indicate_error(c); |
3161 | break; |
3162 | case 'f': // f- forward to a user specified char |
3163 | last_forward_char = get_one_char(); // get the search char |
3164 | // |
3165 | // dont separate these two commands. 'f' depends on ';' |
3166 | // |
3167 | //**** fall thru to ... ';' |
3168 | case ';': // ;- look at rest of line for last forward char |
3169 | if (cmdcnt-- > 1) { |
3170 | do_cmd(';'); |
3171 | } // repeat cnt |
3172 | if (last_forward_char == 0) break; |
3173 | q = dot + 1; |
3174 | while (q < end - 1 && *q != '\n' && *q != last_forward_char) { |
3175 | q++; |
3176 | } |
3177 | if (*q == last_forward_char) |
3178 | dot = q; |
3179 | break; |
3180 | case '-': // -- goto prev line |
3181 | if (cmdcnt-- > 1) { |
3182 | do_cmd(c); |
3183 | } // repeat cnt |
3184 | dot_prev(); |
3185 | dot_skip_over_ws(); |
3186 | break; |
3187 | #if ENABLE_FEATURE_VI_DOT_CMD |
3188 | case '.': // .- repeat the last modifying command |
3189 | // Stuff the last_modifying_cmd back into stdin |
3190 | // and let it be re-executed. |
3191 | if (last_modifying_cmd != 0) { |
3192 | ioq = ioq_start = (Byte *) xstrdup((char *) last_modifying_cmd); |
3193 | } |
3194 | break; |
3195 | #endif |
3196 | #if ENABLE_FEATURE_VI_SEARCH |
3197 | case '?': // /- search for a pattern |
3198 | case '/': // /- search for a pattern |
3199 | buf[0] = c; |
3200 | buf[1] = '\0'; |
3201 | q = get_input_line(buf); // get input line- use "status line" |
3202 | if (strlen((char *) q) == 1) |
3203 | goto dc3; // if no pat re-use old pat |
3204 | if (strlen((char *) q) > 1) { // new pat- save it and find |
3205 | // there is a new pat |
3206 | free(last_search_pattern); |
3207 | last_search_pattern = (Byte *) xstrdup((char *) q); |
3208 | goto dc3; // now find the pattern |
3209 | } |
3210 | // user changed mind and erased the "/"- do nothing |
3211 | break; |
3212 | case 'N': // N- backward search for last pattern |
3213 | if (cmdcnt-- > 1) { |
3214 | do_cmd(c); |
3215 | } // repeat cnt |
3216 | dir = BACK; // assume BACKWARD search |
3217 | p = dot - 1; |
3218 | if (last_search_pattern[0] == '?') { |
3219 | dir = FORWARD; |
3220 | p = dot + 1; |
3221 | } |
3222 | goto dc4; // now search for pattern |
3223 | break; |
3224 | case 'n': // n- repeat search for last pattern |
3225 | // search rest of text[] starting at next char |
3226 | // if search fails return orignal "p" not the "p+1" address |
3227 | if (cmdcnt-- > 1) { |
3228 | do_cmd(c); |
3229 | } // repeat cnt |
3230 | dc3: |
3231 | if (last_search_pattern == 0) { |
3232 | msg = (Byte *) "No previous regular expression"; |
3233 | goto dc2; |
3234 | } |
3235 | if (last_search_pattern[0] == '/') { |
3236 | dir = FORWARD; // assume FORWARD search |
3237 | p = dot + 1; |
3238 | } |
3239 | if (last_search_pattern[0] == '?') { |
3240 | dir = BACK; |
3241 | p = dot - 1; |
3242 | } |
3243 | dc4: |
3244 | q = char_search(p, last_search_pattern + 1, dir, FULL); |
3245 | if (q != NULL) { |
3246 | dot = q; // good search, update "dot" |
3247 | msg = (Byte *) ""; |
3248 | goto dc2; |
3249 | } |
3250 | // no pattern found between "dot" and "end"- continue at top |
3251 | p = text; |
3252 | if (dir == BACK) { |
3253 | p = end - 1; |
3254 | } |
3255 | q = char_search(p, last_search_pattern + 1, dir, FULL); |
3256 | if (q != NULL) { // found something |
3257 | dot = q; // found new pattern- goto it |
3258 | msg = (Byte *) "search hit BOTTOM, continuing at TOP"; |
3259 | if (dir == BACK) { |
3260 | msg = (Byte *) "search hit TOP, continuing at BOTTOM"; |
3261 | } |
3262 | } else { |
3263 | msg = (Byte *) "Pattern not found"; |
3264 | } |
3265 | dc2: |
3266 | if (*msg) psbs("%s", msg); |
3267 | break; |
3268 | case '{': // {- move backward paragraph |
3269 | q = char_search(dot, (Byte *) "\n\n", BACK, FULL); |
3270 | if (q != NULL) { // found blank line |
3271 | dot = next_line(q); // move to next blank line |
3272 | } |
3273 | break; |
3274 | case '}': // }- move forward paragraph |
3275 | q = char_search(dot, (Byte *) "\n\n", FORWARD, FULL); |
3276 | if (q != NULL) { // found blank line |
3277 | dot = next_line(q); // move to next blank line |
3278 | } |
3279 | break; |
3280 | #endif /* FEATURE_VI_SEARCH */ |
3281 | case '0': // 0- goto begining of line |
3282 | case '1': // 1- |
3283 | case '2': // 2- |
3284 | case '3': // 3- |
3285 | case '4': // 4- |
3286 | case '5': // 5- |
3287 | case '6': // 6- |
3288 | case '7': // 7- |
3289 | case '8': // 8- |
3290 | case '9': // 9- |
3291 | if (c == '0' && cmdcnt < 1) { |
3292 | dot_begin(); // this was a standalone zero |
3293 | } else { |
3294 | cmdcnt = cmdcnt * 10 + (c - '0'); // this 0 is part of a number |
3295 | } |
3296 | break; |
3297 | case ':': // :- the colon mode commands |
3298 | p = get_input_line((Byte *) ":"); // get input line- use "status line" |
3299 | #if ENABLE_FEATURE_VI_COLON |
3300 | colon(p); // execute the command |
3301 | #else |
3302 | if (*p == ':') |
3303 | p++; // move past the ':' |
3304 | cnt = strlen((char *) p); |
3305 | if (cnt <= 0) |
3306 | break; |
3307 | if (strncasecmp((char *) p, "quit", cnt) == 0 || |
3308 | strncasecmp((char *) p, "q!", cnt) == 0) { // delete lines |
3309 | if (file_modified && p[1] != '!') { |
3310 | psbs("No write since last change (:quit! overrides)"); |
3311 | } else { |
3312 | editing = 0; |
3313 | } |
3314 | } else if (strncasecmp((char *) p, "write", cnt) == 0 |
3315 | || strncasecmp((char *) p, "wq", cnt) == 0 |
3316 | || strncasecmp((char *) p, "wn", cnt) == 0 |
3317 | || strncasecmp((char *) p, "x", cnt) == 0) { |
3318 | cnt = file_write(cfn, text, end - 1); |
3319 | if (cnt < 0) { |
3320 | if (cnt == -1) |
3321 | psbs("Write error: %s", strerror(errno)); |
3322 | } else { |
3323 | file_modified = 0; |
3324 | last_file_modified = -1; |
3325 | psb("\"%s\" %dL, %dC", cfn, count_lines(text, end - 1), cnt); |
3326 | if (p[0] == 'x' || p[1] == 'q' || p[1] == 'n' || |
3327 | p[0] == 'X' || p[1] == 'Q' || p[1] == 'N') { |
3328 | editing = 0; |
3329 | } |
3330 | } |
3331 | } else if (strncasecmp((char *) p, "file", cnt) == 0 ) { |
3332 | last_status_cksum = 0; // force status update |
3333 | } else if (sscanf((char *) p, "%d", &j) > 0) { |
3334 | dot = find_line(j); // go to line # j |
3335 | dot_skip_over_ws(); |
3336 | } else { // unrecognised cmd |
3337 | ni((Byte *) p); |
3338 | } |
3339 | #endif /* !FEATURE_VI_COLON */ |
3340 | break; |
3341 | case '<': // <- Left shift something |
3342 | case '>': // >- Right shift something |
3343 | cnt = count_lines(text, dot); // remember what line we are on |
3344 | c1 = get_one_char(); // get the type of thing to delete |
3345 | find_range(&p, &q, c1); |
3346 | (void) yank_delete(p, q, 1, YANKONLY); // save copy before change |
3347 | p = begin_line(p); |
3348 | q = end_line(q); |
3349 | i = count_lines(p, q); // # of lines we are shifting |
3350 | for ( ; i > 0; i--, p = next_line(p)) { |
3351 | if (c == '<') { |
3352 | // shift left- remove tab or 8 spaces |
3353 | if (*p == '\t') { |
3354 | // shrink buffer 1 char |
3355 | (void) text_hole_delete(p, p); |
3356 | } else if (*p == ' ') { |
3357 | // we should be calculating columns, not just SPACE |
3358 | for (j = 0; *p == ' ' && j < tabstop; j++) { |
3359 | (void) text_hole_delete(p, p); |
3360 | } |
3361 | } |
3362 | } else if (c == '>') { |
3363 | // shift right -- add tab or 8 spaces |
3364 | (void) char_insert(p, '\t'); |
3365 | } |
3366 | } |
3367 | dot = find_line(cnt); // what line were we on |
3368 | dot_skip_over_ws(); |
3369 | end_cmd_q(); // stop adding to q |
3370 | break; |
3371 | case 'A': // A- append at e-o-l |
3372 | dot_end(); // go to e-o-l |
3373 | //**** fall thru to ... 'a' |
3374 | case 'a': // a- append after current char |
3375 | if (*dot != '\n') |
3376 | dot++; |
3377 | goto dc_i; |
3378 | break; |
3379 | case 'B': // B- back a blank-delimited Word |
3380 | case 'E': // E- end of a blank-delimited word |
3381 | case 'W': // W- forward a blank-delimited word |
3382 | if (cmdcnt-- > 1) { |
3383 | do_cmd(c); |
3384 | } // repeat cnt |
3385 | dir = FORWARD; |
3386 | if (c == 'B') |
3387 | dir = BACK; |
3388 | if (c == 'W' || isspace(dot[dir])) { |
3389 | dot = skip_thing(dot, 1, dir, S_TO_WS); |
3390 | dot = skip_thing(dot, 2, dir, S_OVER_WS); |
3391 | } |
3392 | if (c != 'W') |
3393 | dot = skip_thing(dot, 1, dir, S_BEFORE_WS); |
3394 | break; |
3395 | case 'C': // C- Change to e-o-l |
3396 | case 'D': // D- delete to e-o-l |
3397 | save_dot = dot; |
3398 | dot = dollar_line(dot); // move to before NL |
3399 | // copy text into a register and delete |
3400 | dot = yank_delete(save_dot, dot, 0, YANKDEL); // delete to e-o-l |
3401 | if (c == 'C') |
3402 | goto dc_i; // start inserting |
3403 | #if ENABLE_FEATURE_VI_DOT_CMD |
3404 | if (c == 'D') |
3405 | end_cmd_q(); // stop adding to q |
3406 | #endif |
3407 | break; |
3408 | case 'G': // G- goto to a line number (default= E-O-F) |
3409 | dot = end - 1; // assume E-O-F |
3410 | if (cmdcnt > 0) { |
3411 | dot = find_line(cmdcnt); // what line is #cmdcnt |
3412 | } |
3413 | dot_skip_over_ws(); |
3414 | break; |
3415 | case 'H': // H- goto top line on screen |
3416 | dot = screenbegin; |
3417 | if (cmdcnt > (rows - 1)) { |
3418 | cmdcnt = (rows - 1); |
3419 | } |
3420 | if (cmdcnt-- > 1) { |
3421 | do_cmd('+'); |
3422 | } // repeat cnt |
3423 | dot_skip_over_ws(); |
3424 | break; |
3425 | case 'I': // I- insert before first non-blank |
3426 | dot_begin(); // 0 |
3427 | dot_skip_over_ws(); |
3428 | //**** fall thru to ... 'i' |
3429 | case 'i': // i- insert before current char |
3430 | case VI_K_INSERT: // Cursor Key Insert |
3431 | dc_i: |
3432 | cmd_mode = 1; // start insrting |
3433 | break; |
3434 | case 'J': // J- join current and next lines together |
3435 | if (cmdcnt-- > 2) { |
3436 | do_cmd(c); |
3437 | } // repeat cnt |
3438 | dot_end(); // move to NL |
3439 | if (dot < end - 1) { // make sure not last char in text[] |
3440 | *dot++ = ' '; // replace NL with space |
3441 | file_modified++; |
3442 | while (isblnk(*dot)) { // delete leading WS |
3443 | dot_delete(); |
3444 | } |
3445 | } |
3446 | end_cmd_q(); // stop adding to q |
3447 | break; |
3448 | case 'L': // L- goto bottom line on screen |
3449 | dot = end_screen(); |
3450 | if (cmdcnt > (rows - 1)) { |
3451 | cmdcnt = (rows - 1); |
3452 | } |
3453 | if (cmdcnt-- > 1) { |
3454 | do_cmd('-'); |
3455 | } // repeat cnt |
3456 | dot_begin(); |
3457 | dot_skip_over_ws(); |
3458 | break; |
3459 | case 'M': // M- goto middle line on screen |
3460 | dot = screenbegin; |
3461 | for (cnt = 0; cnt < (rows-1) / 2; cnt++) |
3462 | dot = next_line(dot); |
3463 | break; |
3464 | case 'O': // O- open a empty line above |
3465 | // 0i\n ESC -i |
3466 | p = begin_line(dot); |
3467 | if (p[-1] == '\n') { |
3468 | dot_prev(); |
3469 | case 'o': // o- open a empty line below; Yes, I know it is in the middle of the "if (..." |
3470 | dot_end(); |
3471 | dot = char_insert(dot, '\n'); |
3472 | } else { |
3473 | dot_begin(); // 0 |
3474 | dot = char_insert(dot, '\n'); // i\n ESC |
3475 | dot_prev(); // - |
3476 | } |
3477 | goto dc_i; |
3478 | break; |
3479 | case 'R': // R- continuous Replace char |
3480 | dc5: |
3481 | cmd_mode = 2; |
3482 | break; |
3483 | case 'X': // X- delete char before dot |
3484 | case 'x': // x- delete the current char |
3485 | case 's': // s- substitute the current char |
3486 | if (cmdcnt-- > 1) { |
3487 | do_cmd(c); |
3488 | } // repeat cnt |
3489 | dir = 0; |
3490 | if (c == 'X') |
3491 | dir = -1; |
3492 | if (dot[dir] != '\n') { |
3493 | if (c == 'X') |
3494 | dot--; // delete prev char |
3495 | dot = yank_delete(dot, dot, 0, YANKDEL); // delete char |
3496 | } |
3497 | if (c == 's') |
3498 | goto dc_i; // start insrting |
3499 | end_cmd_q(); // stop adding to q |
3500 | break; |
3501 | case 'Z': // Z- if modified, {write}; exit |
3502 | // ZZ means to save file (if necessary), then exit |
3503 | c1 = get_one_char(); |
3504 | if (c1 != 'Z') { |
3505 | indicate_error(c); |
3506 | break; |
3507 | } |
3508 | if (file_modified) { |
3509 | #if ENABLE_FEATURE_VI_READONLY |
3510 | if (vi_readonly || readonly) { |
3511 | psbs("\"%s\" File is read only", cfn); |
3512 | break; |
3513 | } |
3514 | #endif |
3515 | cnt = file_write(cfn, text, end - 1); |
3516 | if (cnt < 0) { |
3517 | if (cnt == -1) |
3518 | psbs("Write error: %s", strerror(errno)); |
3519 | } else if (cnt == (end - 1 - text + 1)) { |
3520 | editing = 0; |
3521 | } |
3522 | } else { |
3523 | editing = 0; |
3524 | } |
3525 | break; |
3526 | case '^': // ^- move to first non-blank on line |
3527 | dot_begin(); |
3528 | dot_skip_over_ws(); |
3529 | break; |
3530 | case 'b': // b- back a word |
3531 | case 'e': // e- end of word |
3532 | if (cmdcnt-- > 1) { |
3533 | do_cmd(c); |
3534 | } // repeat cnt |
3535 | dir = FORWARD; |
3536 | if (c == 'b') |
3537 | dir = BACK; |
3538 | if ((dot + dir) < text || (dot + dir) > end - 1) |
3539 | break; |
3540 | dot += dir; |
3541 | if (isspace(*dot)) { |
3542 | dot = skip_thing(dot, (c == 'e') ? 2 : 1, dir, S_OVER_WS); |
3543 | } |
3544 | if (isalnum(*dot) || *dot == '_') { |
3545 | dot = skip_thing(dot, 1, dir, S_END_ALNUM); |
3546 | } else if (ispunct(*dot)) { |
3547 | dot = skip_thing(dot, 1, dir, S_END_PUNCT); |
3548 | } |
3549 | break; |
3550 | case 'c': // c- change something |
3551 | case 'd': // d- delete something |
3552 | #if ENABLE_FEATURE_VI_YANKMARK |
3553 | case 'y': // y- yank something |
3554 | case 'Y': // Y- Yank a line |
3555 | #endif |
3556 | yf = YANKDEL; // assume either "c" or "d" |
3557 | #if ENABLE_FEATURE_VI_YANKMARK |
3558 | if (c == 'y' || c == 'Y') |
3559 | yf = YANKONLY; |
3560 | #endif |
3561 | c1 = 'y'; |
3562 | if (c != 'Y') |
3563 | c1 = get_one_char(); // get the type of thing to delete |
3564 | find_range(&p, &q, c1); |
3565 | if (c1 == 27) { // ESC- user changed mind and wants out |
3566 | c = c1 = 27; // Escape- do nothing |
3567 | } else if (strchr("wW", c1)) { |
3568 | if (c == 'c') { |
3569 | // don't include trailing WS as part of word |
3570 | while (isblnk(*q)) { |
3571 | if (q <= text || q[-1] == '\n') |
3572 | break; |
3573 | q--; |
3574 | } |
3575 | } |
3576 | dot = yank_delete(p, q, 0, yf); // delete word |
3577 | } else if (strchr("^0bBeEft$", c1)) { |
3578 | // single line copy text into a register and delete |
3579 | dot = yank_delete(p, q, 0, yf); // delete word |
3580 | } else if (strchr("cdykjHL%+-{}\r\n", c1)) { |
3581 | // multiple line copy text into a register and delete |
3582 | dot = yank_delete(p, q, 1, yf); // delete lines |
3583 | if (c == 'c') { |
3584 | dot = char_insert(dot, '\n'); |
3585 | // on the last line of file don't move to prev line |
3586 | if (dot != (end-1)) { |
3587 | dot_prev(); |
3588 | } |
3589 | } else if (c == 'd') { |
3590 | dot_begin(); |
3591 | dot_skip_over_ws(); |
3592 | } |
3593 | } else { |
3594 | // could not recognize object |
3595 | c = c1 = 27; // error- |
3596 | indicate_error(c); |
3597 | } |
3598 | if (c1 != 27) { |
3599 | // if CHANGING, not deleting, start inserting after the delete |
3600 | if (c == 'c') { |
3601 | strcpy((char *) buf, "Change"); |
3602 | goto dc_i; // start inserting |
3603 | } |
3604 | if (c == 'd') { |
3605 | strcpy((char *) buf, "Delete"); |
3606 | } |
3607 | #if ENABLE_FEATURE_VI_YANKMARK |
3608 | if (c == 'y' || c == 'Y') { |
3609 | strcpy((char *) buf, "Yank"); |
3610 | } |
3611 | p = reg[YDreg]; |
3612 | q = p + strlen((char *) p); |
3613 | for (cnt = 0; p <= q; p++) { |
3614 | if (*p == '\n') |
3615 | cnt++; |
3616 | } |
3617 | psb("%s %d lines (%d chars) using [%c]", |
3618 | buf, cnt, strlen((char *) reg[YDreg]), what_reg()); |
3619 | #endif |
3620 | end_cmd_q(); // stop adding to q |
3621 | } |
3622 | break; |
3623 | case 'k': // k- goto prev line, same col |
3624 | case VI_K_UP: // cursor key Up |
3625 | if (cmdcnt-- > 1) { |
3626 | do_cmd(c); |
3627 | } // repeat cnt |
3628 | dot_prev(); |
3629 | dot = move_to_col(dot, ccol + offset); // try stay in same col |
3630 | break; |
3631 | case 'r': // r- replace the current char with user input |
3632 | c1 = get_one_char(); // get the replacement char |
3633 | if (*dot != '\n') { |
3634 | *dot = c1; |
3635 | file_modified++; // has the file been modified |
3636 | } |
3637 | end_cmd_q(); // stop adding to q |
3638 | break; |
3639 | case 't': // t- move to char prior to next x |
3640 | last_forward_char = get_one_char(); |
3641 | do_cmd(';'); |
3642 | if (*dot == last_forward_char) |
3643 | dot_left(); |
3644 | last_forward_char= 0; |
3645 | break; |
3646 | case 'w': // w- forward a word |
3647 | if (cmdcnt-- > 1) { |
3648 | do_cmd(c); |
3649 | } // repeat cnt |
3650 | if (isalnum(*dot) || *dot == '_') { // we are on ALNUM |
3651 | dot = skip_thing(dot, 1, FORWARD, S_END_ALNUM); |
3652 | } else if (ispunct(*dot)) { // we are on PUNCT |
3653 | dot = skip_thing(dot, 1, FORWARD, S_END_PUNCT); |
3654 | } |
3655 | if (dot < end - 1) |
3656 | dot++; // move over word |
3657 | if (isspace(*dot)) { |
3658 | dot = skip_thing(dot, 2, FORWARD, S_OVER_WS); |
3659 | } |
3660 | break; |
3661 | case 'z': // z- |
3662 | c1 = get_one_char(); // get the replacement char |
3663 | cnt = 0; |
3664 | if (c1 == '.') |
3665 | cnt = (rows - 2) / 2; // put dot at center |
3666 | if (c1 == '-') |
3667 | cnt = rows - 2; // put dot at bottom |
3668 | screenbegin = begin_line(dot); // start dot at top |
3669 | dot_scroll(cnt, -1); |
3670 | break; |
3671 | case '|': // |- move to column "cmdcnt" |
3672 | dot = move_to_col(dot, cmdcnt - 1); // try to move to column |
3673 | break; |
3674 | case '~': // ~- flip the case of letters a-z -> A-Z |
3675 | if (cmdcnt-- > 1) { |
3676 | do_cmd(c); |
3677 | } // repeat cnt |
3678 | if (islower(*dot)) { |
3679 | *dot = toupper(*dot); |
3680 | file_modified++; // has the file been modified |
3681 | } else if (isupper(*dot)) { |
3682 | *dot = tolower(*dot); |
3683 | file_modified++; // has the file been modified |
3684 | } |
3685 | dot_right(); |
3686 | end_cmd_q(); // stop adding to q |
3687 | break; |
3688 | //----- The Cursor and Function Keys ----------------------------- |
3689 | case VI_K_HOME: // Cursor Key Home |
3690 | dot_begin(); |
3691 | break; |
3692 | // The Fn keys could point to do_macro which could translate them |
3693 | case VI_K_FUN1: // Function Key F1 |
3694 | case VI_K_FUN2: // Function Key F2 |
3695 | case VI_K_FUN3: // Function Key F3 |
3696 | case VI_K_FUN4: // Function Key F4 |
3697 | case VI_K_FUN5: // Function Key F5 |
3698 | case VI_K_FUN6: // Function Key F6 |
3699 | case VI_K_FUN7: // Function Key F7 |
3700 | case VI_K_FUN8: // Function Key F8 |
3701 | case VI_K_FUN9: // Function Key F9 |
3702 | case VI_K_FUN10: // Function Key F10 |
3703 | case VI_K_FUN11: // Function Key F11 |
3704 | case VI_K_FUN12: // Function Key F12 |
3705 | break; |
3706 | } |
3707 | |
3708 | dc1: |
3709 | // if text[] just became empty, add back an empty line |
3710 | if (end == text) { |
3711 | (void) char_insert(text, '\n'); // start empty buf with dummy line |
3712 | dot = text; |
3713 | } |
3714 | // it is OK for dot to exactly equal to end, otherwise check dot validity |
3715 | if (dot != end) { |
3716 | dot = bound_dot(dot); // make sure "dot" is valid |
3717 | } |
3718 | #if ENABLE_FEATURE_VI_YANKMARK |
3719 | check_context(c); // update the current context |
3720 | #endif |
3721 | |
3722 | if (!isdigit(c)) |
3723 | cmdcnt = 0; // cmd was not a number, reset cmdcnt |
3724 | cnt = dot - begin_line(dot); |
3725 | // Try to stay off of the Newline |
3726 | if (*dot == '\n' && cnt > 0 && cmd_mode == 0) |
3727 | dot--; |
3728 | } |
3729 | |
3730 | #if ENABLE_FEATURE_VI_CRASHME |
3731 | static int totalcmds = 0; |
3732 | static int Mp = 85; // Movement command Probability |
3733 | static int Np = 90; // Non-movement command Probability |
3734 | static int Dp = 96; // Delete command Probability |
3735 | static int Ip = 97; // Insert command Probability |
3736 | static int Yp = 98; // Yank command Probability |
3737 | static int Pp = 99; // Put command Probability |
3738 | static int M = 0, N = 0, I = 0, D = 0, Y = 0, P = 0, U = 0; |
3739 | char chars[20] = "\t012345 abcdABCD-=.$"; |
3740 | char *words[20] = { "this", "is", "a", "test", |
3741 | "broadcast", "the", "emergency", "of", |
3742 | "system", "quick", "brown", "fox", |
3743 | "jumped", "over", "lazy", "dogs", |
3744 | "back", "January", "Febuary", "March" |
3745 | }; |
3746 | char *lines[20] = { |
3747 | "You should have received a copy of the GNU General Public License\n", |
3748 | "char c, cm, *cmd, *cmd1;\n", |
3749 | "generate a command by percentages\n", |
3750 | "Numbers may be typed as a prefix to some commands.\n", |
3751 | "Quit, discarding changes!\n", |
3752 | "Forced write, if permission originally not valid.\n", |
3753 | "In general, any ex or ed command (such as substitute or delete).\n", |
3754 | "I have tickets available for the Blazers vs LA Clippers for Monday, Janurary 1 at 1:00pm.\n", |
3755 | "Please get w/ me and I will go over it with you.\n", |
3756 | "The following is a list of scheduled, committed changes.\n", |
3757 | "1. Launch Norton Antivirus (Start, Programs, Norton Antivirus)\n", |
3758 | "Reminder....Town Meeting in Central Perk cafe today at 3:00pm.\n", |
3759 | "Any question about transactions please contact Sterling Huxley.\n", |
3760 | "I will try to get back to you by Friday, December 31.\n", |
3761 | "This Change will be implemented on Friday.\n", |
3762 | "Let me know if you have problems accessing this;\n", |
3763 | "Sterling Huxley recently added you to the access list.\n", |
3764 | "Would you like to go to lunch?\n", |
3765 | "The last command will be automatically run.\n", |
3766 | "This is too much english for a computer geek.\n", |
3767 | }; |
3768 | char *multilines[20] = { |
3769 | "You should have received a copy of the GNU General Public License\n", |
3770 | "char c, cm, *cmd, *cmd1;\n", |
3771 | "generate a command by percentages\n", |
3772 | "Numbers may be typed as a prefix to some commands.\n", |
3773 | "Quit, discarding changes!\n", |
3774 | "Forced write, if permission originally not valid.\n", |
3775 | "In general, any ex or ed command (such as substitute or delete).\n", |
3776 | "I have tickets available for the Blazers vs LA Clippers for Monday, Janurary 1 at 1:00pm.\n", |
3777 | "Please get w/ me and I will go over it with you.\n", |
3778 | "The following is a list of scheduled, committed changes.\n", |
3779 | "1. Launch Norton Antivirus (Start, Programs, Norton Antivirus)\n", |
3780 | "Reminder....Town Meeting in Central Perk cafe today at 3:00pm.\n", |
3781 | "Any question about transactions please contact Sterling Huxley.\n", |
3782 | "I will try to get back to you by Friday, December 31.\n", |
3783 | "This Change will be implemented on Friday.\n", |
3784 | "Let me know if you have problems accessing this;\n", |
3785 | "Sterling Huxley recently added you to the access list.\n", |
3786 | "Would you like to go to lunch?\n", |
3787 | "The last command will be automatically run.\n", |
3788 | "This is too much english for a computer geek.\n", |
3789 | }; |
3790 | |
3791 | // create a random command to execute |
3792 | static void crash_dummy() |
3793 | { |
3794 | static int sleeptime; // how long to pause between commands |
3795 | char c, cm, *cmd, *cmd1; |
3796 | int i, cnt, thing, rbi, startrbi, percent; |
3797 | |
3798 | // "dot" movement commands |
3799 | cmd1 = " \n\r\002\004\005\006\025\0310^$-+wWeEbBhjklHL"; |
3800 | |
3801 | // is there already a command running? |
3802 | if (readed_for_parse > 0) |
3803 | goto cd1; |
3804 | cd0: |
3805 | startrbi = rbi = 0; |
3806 | sleeptime = 0; // how long to pause between commands |
3807 | memset(readbuffer, '\0', BUFSIZ); // clear the read buffer |
3808 | // generate a command by percentages |
3809 | percent = (int) lrand48() % 100; // get a number from 0-99 |
3810 | if (percent < Mp) { // Movement commands |
3811 | // available commands |
3812 | cmd = cmd1; |
3813 | M++; |
3814 | } else if (percent < Np) { // non-movement commands |
3815 | cmd = "mz<>\'\""; // available commands |
3816 | N++; |
3817 | } else if (percent < Dp) { // Delete commands |
3818 | cmd = "dx"; // available commands |
3819 | D++; |
3820 | } else if (percent < Ip) { // Inset commands |
3821 | cmd = "iIaAsrJ"; // available commands |
3822 | I++; |
3823 | } else if (percent < Yp) { // Yank commands |
3824 | cmd = "yY"; // available commands |
3825 | Y++; |
3826 | } else if (percent < Pp) { // Put commands |
3827 | cmd = "pP"; // available commands |
3828 | P++; |
3829 | } else { |
3830 | // We do not know how to handle this command, try again |
3831 | U++; |
3832 | goto cd0; |
3833 | } |
3834 | // randomly pick one of the available cmds from "cmd[]" |
3835 | i = (int) lrand48() % strlen(cmd); |
3836 | cm = cmd[i]; |
3837 | if (strchr(":\024", cm)) |
3838 | goto cd0; // dont allow colon or ctrl-T commands |
3839 | readbuffer[rbi++] = cm; // put cmd into input buffer |
3840 | |
3841 | // now we have the command- |
3842 | // there are 1, 2, and multi char commands |
3843 | // find out which and generate the rest of command as necessary |
3844 | if (strchr("dmryz<>\'\"", cm)) { // 2-char commands |
3845 | cmd1 = " \n\r0$^-+wWeEbBhjklHL"; |
3846 | if (cm == 'm' || cm == '\'' || cm == '\"') { // pick a reg[] |
3847 | cmd1 = "abcdefghijklmnopqrstuvwxyz"; |
3848 | } |
3849 | thing = (int) lrand48() % strlen(cmd1); // pick a movement command |
3850 | c = cmd1[thing]; |
3851 | readbuffer[rbi++] = c; // add movement to input buffer |
3852 | } |
3853 | if (strchr("iIaAsc", cm)) { // multi-char commands |
3854 | if (cm == 'c') { |
3855 | // change some thing |
3856 | thing = (int) lrand48() % strlen(cmd1); // pick a movement command |
3857 | c = cmd1[thing]; |
3858 | readbuffer[rbi++] = c; // add movement to input buffer |
3859 | } |
3860 | thing = (int) lrand48() % 4; // what thing to insert |
3861 | cnt = (int) lrand48() % 10; // how many to insert |
3862 | for (i = 0; i < cnt; i++) { |
3863 | if (thing == 0) { // insert chars |
3864 | readbuffer[rbi++] = chars[((int) lrand48() % strlen(chars))]; |
3865 | } else if (thing == 1) { // insert words |
3866 | strcat((char *) readbuffer, words[(int) lrand48() % 20]); |
3867 | strcat((char *) readbuffer, " "); |
3868 | sleeptime = 0; // how fast to type |
3869 | } else if (thing == 2) { // insert lines |
3870 | strcat((char *) readbuffer, lines[(int) lrand48() % 20]); |
3871 | sleeptime = 0; // how fast to type |
3872 | } else { // insert multi-lines |
3873 | strcat((char *) readbuffer, multilines[(int) lrand48() % 20]); |
3874 | sleeptime = 0; // how fast to type |
3875 | } |
3876 | } |
3877 | strcat((char *) readbuffer, "\033"); |
3878 | } |
3879 | readed_for_parse = strlen(readbuffer); |
3880 | cd1: |
3881 | totalcmds++; |
3882 | if (sleeptime > 0) |
3883 | (void) mysleep(sleeptime); // sleep 1/100 sec |
3884 | } |
3885 | |
3886 | // test to see if there are any errors |
3887 | static void crash_test() |
3888 | { |
3889 | static time_t oldtim; |
3890 | time_t tim; |
3891 | char d[2], msg[BUFSIZ]; |
3892 | |
3893 | msg[0] = '\0'; |
3894 | if (end < text) { |
3895 | strcat((char *) msg, "end<text "); |
3896 | } |
3897 | if (end > textend) { |
3898 | strcat((char *) msg, "end>textend "); |
3899 | } |
3900 | if (dot < text) { |
3901 | strcat((char *) msg, "dot<text "); |
3902 | } |
3903 | if (dot > end) { |
3904 | strcat((char *) msg, "dot>end "); |
3905 | } |
3906 | if (screenbegin < text) { |
3907 | strcat((char *) msg, "screenbegin<text "); |
3908 | } |
3909 | if (screenbegin > end - 1) { |
3910 | strcat((char *) msg, "screenbegin>end-1 "); |
3911 | } |
3912 | |
3913 | if (strlen(msg) > 0) { |
3914 | alarm(0); |
3915 | printf("\n\n%d: \'%c\' %s\n\n\n%s[Hit return to continue]%s", |
3916 | totalcmds, last_input_char, msg, SOs, SOn); |
3917 | fflush(stdout); |
3918 | while (read(0, d, 1) > 0) { |
3919 | if (d[0] == '\n' || d[0] == '\r') |
3920 | break; |
3921 | } |
3922 | alarm(3); |
3923 | } |
3924 | tim = (time_t) time((time_t *) 0); |
3925 | if (tim >= (oldtim + 3)) { |
3926 | sprintf((char *) status_buffer, |
3927 | "Tot=%d: M=%d N=%d I=%d D=%d Y=%d P=%d U=%d size=%d", |
3928 | totalcmds, M, N, I, D, Y, P, U, end - text + 1); |
3929 | oldtim = tim; |
3930 | } |
3931 | return; |
3932 | } |
3933 | #endif |