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394a1d25 C |
1 | /************************************************************************* |
2 | * This program is copyright (C) 1985, 1986 by Jonathan Payne. It is * | |
3 | * provided to you without charge for use only on a licensed Unix * | |
4 | * system. You may copy JOVE provided that this notice is included with * | |
5 | * the copy. You may not sell copies of this program or versions * | |
6 | * modified for use on microcomputer systems, unless the copies are * | |
7 | * included with a Unix system distribution and the source is provided. * | |
8 | *************************************************************************/ | |
9 | ||
10 | /* Contains commands that deal with creating, selecting, killing and | |
11 | listing buffers, and buffer modes, and find-file, etc. */ | |
12 | ||
13 | #include "jove.h" | |
14 | ||
15 | #include <sys/stat.h> | |
16 | ||
17 | char *Mainbuf = "Main", | |
18 | *NoName = "Sans un nom!"; | |
19 | ||
20 | Buffer *world = 0, /* First in the list */ | |
21 | *curbuf = 0, | |
22 | *lastbuf = 0; /* Last buffer we were in so we have a default | |
23 | buffer during a select buffer. */ | |
24 | ||
25 | /* Toggle BIT in the current buffer's minor mode flags. If argument is | |
26 | supplied, a positive one always turns on the mode and zero argument | |
27 | always turns it off. */ | |
28 | ||
29 | TogMinor(bit) | |
30 | { | |
31 | if (exp_p) { | |
32 | if (exp == 0) | |
33 | curbuf->b_minor &= ~bit; | |
34 | else | |
35 | curbuf->b_minor |= bit; | |
36 | } else | |
37 | curbuf->b_minor ^= bit; | |
38 | UpdModLine++; | |
39 | } | |
40 | ||
41 | /* Creates a new buffer, links it at the end of the buffer chain, and | |
42 | returns it. */ | |
43 | ||
44 | static Buffer * | |
45 | buf_alloc() | |
46 | { | |
47 | register Buffer *b, | |
48 | *lastbp; | |
49 | ||
50 | lastbp = 0; | |
51 | for (b = world; b != 0; lastbp = b, b = b->b_next) | |
52 | ; | |
53 | ||
54 | b = (Buffer *) emalloc(sizeof (Buffer)); | |
55 | if (lastbp) | |
56 | lastbp->b_next = b; | |
57 | else | |
58 | world = b; | |
59 | b->b_first = 0; | |
60 | b->b_next = 0; | |
61 | ||
62 | return b; | |
63 | } | |
64 | ||
65 | /* Makes a buffer and initializes it. Obsolete. Used to take two | |
66 | arguments, a buffer name and a file name. */ | |
67 | ||
68 | static Buffer * | |
69 | mak_buf() | |
70 | { | |
71 | register Buffer *newb; | |
72 | register int i; | |
73 | ||
74 | newb = buf_alloc(); | |
75 | newb->b_fname = 0; | |
76 | newb->b_name = NoName; | |
77 | set_ino(newb); | |
78 | newb->b_marks = 0; | |
79 | newb->b_themark = 0; /* Index into markring */ | |
80 | /* No marks yet */ | |
81 | for (i = 0; i < NMARKS; i++) | |
82 | newb->b_markring[i] = 0; | |
83 | newb->b_modified = 0; | |
84 | newb->b_type = B_FILE; /* File until proven SCRATCH */ | |
85 | newb->b_ntbf = 0; | |
86 | newb->b_minor = 0; | |
87 | newb->b_major = TEXT; | |
88 | newb->b_first = 0; | |
89 | initlist(newb); | |
90 | return newb; | |
91 | } | |
92 | ||
93 | ReNamBuf() | |
94 | { | |
95 | register char *new = 0, | |
96 | *prompt = ProcFmt, | |
97 | *second = "%s already exists; new name? "; | |
98 | ||
99 | for (;;) { | |
100 | new = ask((char *) 0, prompt, new); | |
101 | if (!buf_exists(new)) | |
102 | break; | |
103 | prompt = second; | |
104 | } | |
105 | setbname(curbuf, new); | |
106 | } | |
107 | ||
108 | FindFile() | |
109 | { | |
110 | register char *name; | |
111 | char fnamebuf[FILESIZE]; | |
112 | ||
113 | name = ask_file(curbuf->b_fname, fnamebuf); | |
114 | SetABuf(curbuf); | |
115 | SetBuf(do_find(curwind, name, 0)); | |
116 | } | |
117 | ||
118 | static | |
119 | mkbuflist(bnamp) | |
120 | register char **bnamp; | |
121 | { | |
122 | register Buffer *b; | |
123 | ||
124 | for (b = world; b != 0; b = b->b_next) | |
125 | if (b->b_name != 0) | |
126 | *bnamp++ = b->b_name; | |
127 | *bnamp = 0; | |
128 | } | |
129 | ||
130 | char * | |
131 | ask_buf(def) | |
132 | Buffer *def; | |
133 | { | |
134 | char *bnames[100]; | |
135 | register char *bname; | |
136 | register int offset; | |
137 | char prompt[100]; | |
138 | ||
139 | if (def != 0 && def->b_name != 0) | |
140 | sprintf(prompt, ": %f (default %s) ", def->b_name); | |
141 | else | |
142 | sprintf(prompt, ProcFmt); | |
143 | mkbuflist(bnames); | |
144 | offset = complete(bnames, prompt, RET_STATE); | |
145 | if (offset == EOF) | |
146 | complain((char *) 0); | |
147 | if (offset == ORIGINAL) | |
148 | bname = Minibuf; | |
149 | else if (offset == NULLSTRING) { | |
150 | if (def) | |
151 | bname = def->b_name; | |
152 | else | |
153 | complain((char *) 0); | |
154 | } else if (offset < 0) | |
155 | complain((char *) 0); | |
156 | else | |
157 | bname = bnames[offset]; | |
158 | ||
159 | return bname; | |
160 | } | |
161 | ||
162 | BufSelect() | |
163 | { | |
164 | register char *bname; | |
165 | ||
166 | bname = ask_buf(lastbuf); | |
167 | SetABuf(curbuf); | |
168 | SetBuf(do_select(curwind, bname)); | |
169 | } | |
170 | ||
171 | static | |
172 | defb_wind(b) | |
173 | register Buffer *b; | |
174 | { | |
175 | register Window *w = fwind; | |
176 | char *alt; | |
177 | ||
178 | if (lastbuf == b || lastbuf == 0) { | |
179 | lastbuf = 0; | |
180 | alt = (b->b_next != 0) ? b->b_next->b_name : Mainbuf; | |
181 | } else | |
182 | alt = lastbuf->b_name; | |
183 | ||
184 | do { | |
185 | if (w->w_bufp == b) { | |
186 | if (one_windp()) | |
187 | (void) do_select(w, alt); | |
188 | else { | |
189 | register Window *save = w->w_next; | |
190 | ||
191 | del_wind(w); | |
192 | w = save->w_prev; | |
193 | } | |
194 | } | |
195 | w = w->w_next; | |
196 | } while (w != fwind); | |
197 | } | |
198 | ||
199 | Buffer * | |
200 | getNMbuf() | |
201 | { | |
202 | register Buffer *delbuf; | |
203 | register char *bname; | |
204 | ||
205 | bname = ask_buf(curbuf); | |
206 | if ((delbuf = buf_exists(bname)) == 0) | |
207 | complain("[No such buffer]"); | |
208 | if (delbuf->b_modified) | |
209 | confirm("%s modified, are you sure? ", bname); | |
210 | return delbuf; | |
211 | } | |
212 | ||
213 | BufErase() | |
214 | { | |
215 | register Buffer *delbuf; | |
216 | ||
217 | if (delbuf = getNMbuf()) { | |
218 | initlist(delbuf); | |
219 | delbuf->b_modified = 0; | |
220 | } | |
221 | } | |
222 | ||
223 | static | |
224 | kill_buf(delbuf) | |
225 | register Buffer *delbuf; | |
226 | { | |
227 | register Buffer *b, | |
228 | *lastb = 0; | |
229 | extern Buffer *perr_buf; | |
230 | ||
231 | #ifdef IPROCS | |
232 | pbuftiedp(delbuf); /* Make sure buffer is not tied to a process */ | |
233 | #endif | |
234 | for (b = world; b != 0; lastb = b, b = b->b_next) | |
235 | if (b == delbuf) | |
236 | break; | |
237 | if (lastb) | |
238 | lastb->b_next = delbuf->b_next; | |
239 | else | |
240 | world = delbuf->b_next; | |
241 | ||
242 | #define okay_free(ptr) if (ptr) free(ptr) | |
243 | ||
244 | lfreelist(delbuf->b_first); | |
245 | okay_free(delbuf->b_name); | |
246 | okay_free(delbuf->b_fname); | |
247 | free((char *) delbuf); | |
248 | ||
249 | if (delbuf == lastbuf) | |
250 | SetABuf(curbuf); | |
251 | if (perr_buf == delbuf) { | |
252 | ErrFree(); | |
253 | perr_buf = 0; | |
254 | } | |
255 | defb_wind(delbuf); | |
256 | if (curbuf == delbuf) | |
257 | SetBuf(curwind->w_bufp); | |
258 | } | |
259 | ||
260 | /* offer to kill some buffers */ | |
261 | ||
262 | KillSome() | |
263 | { | |
264 | register Buffer *b, | |
265 | *next; | |
266 | Buffer *oldb; | |
267 | register char *y_or_n; | |
268 | ||
269 | for (b = world; b != 0; b = next) { | |
270 | next = b->b_next; | |
271 | y_or_n = ask("No", "Kill %s? ", b->b_name); | |
272 | if (Upper(*y_or_n) != 'Y') | |
273 | continue; | |
274 | if (IsModified(b)) { | |
275 | y_or_n = ask("No", "%s modified; should I save it? ", b->b_name); | |
276 | if (Upper(*y_or_n) == 'Y') { | |
277 | oldb = curbuf; | |
278 | SetBuf(b); | |
279 | SaveFile(); | |
280 | SetBuf(oldb); | |
281 | } | |
282 | } | |
283 | kill_buf(b); | |
284 | } | |
285 | } | |
286 | ||
287 | BufKill() | |
288 | { | |
289 | Buffer *b; | |
290 | ||
291 | if ((b = getNMbuf()) == 0) | |
292 | return; | |
293 | kill_buf(b); | |
294 | } | |
295 | ||
296 | static char * | |
297 | line_cnt(b, buf) | |
298 | register Buffer *b; | |
299 | char *buf; | |
300 | { | |
301 | register int nlines = 0; | |
302 | register Line *lp; | |
303 | ||
304 | for (lp = b->b_first; lp != 0; lp = lp->l_next, nlines++) | |
305 | ; | |
306 | sprintf(buf, "%d", nlines); | |
307 | return buf; | |
308 | } | |
309 | ||
310 | static char *TypeNames[] = { | |
311 | 0, | |
312 | "Scratch", | |
313 | "File", | |
314 | "Process", | |
315 | "I-process" | |
316 | }; | |
317 | ||
318 | BufList() | |
319 | { | |
320 | register char *format = "%-2s %-5s %-11s %-1s %-*s %-s"; | |
321 | register Buffer *b; | |
322 | int bcount = 1, /* To give each buffer a number */ | |
323 | buf_width = 11; | |
324 | char nbuf[10]; | |
325 | extern int ModCount; | |
326 | ||
327 | for (b = world; b != 0; b = b->b_next) | |
328 | buf_width = max(buf_width, strlen(b->b_name)); | |
329 | ||
330 | TOstart("Buffer list", TRUE); /* true means auto-newline */ | |
331 | ||
332 | Typeout("(* means buffer needs saving)"); | |
333 | Typeout("(+ means file hasn't been read yet)"); | |
334 | Typeout(NullStr); | |
335 | Typeout(format, "NO", "Lines", "Type", NullStr, buf_width, "Name", "File"); | |
336 | Typeout(format, "--", "-----", "----", NullStr, buf_width, "----", "----"); | |
337 | for (b = world; b != 0; b = b->b_next) { | |
338 | Typeout(format, itoa(bcount++), | |
339 | line_cnt(b, nbuf), | |
340 | TypeNames[b->b_type], | |
341 | IsModified(b) ? "*" : | |
342 | b->b_ntbf ? "+" : NullStr, | |
343 | buf_width, | |
344 | /* For the * (variable length field) */ | |
345 | b->b_name, | |
346 | filename(b)); | |
347 | ||
348 | if (TOabort) | |
349 | break; | |
350 | } | |
351 | TOstop(); | |
352 | } | |
353 | ||
354 | bufname(b) | |
355 | register Buffer *b; | |
356 | { | |
357 | char tmp[100], | |
358 | *cp; | |
359 | int try = 1; | |
360 | ||
361 | if (b->b_fname == 0) | |
362 | complain("[No file name]"); | |
363 | cp = basename(b->b_fname); | |
364 | strcpy(tmp, cp); | |
365 | while (buf_exists(tmp)) { | |
366 | sprintf(tmp, "%s.%d", cp, try); | |
367 | try++; | |
368 | } | |
369 | setbname(b, tmp); | |
370 | } | |
371 | ||
372 | initlist(b) | |
373 | register Buffer *b; | |
374 | { | |
375 | lfreelist(b->b_first); | |
376 | b->b_first = b->b_dot = b->b_last = 0; | |
377 | (void) listput(b, b->b_first); | |
378 | ||
379 | SavLine(b->b_dot, NullStr); | |
380 | b->b_char = 0; | |
381 | AllMarkSet(b, b->b_dot, 0); | |
382 | if (b == curbuf) | |
383 | getDOT(); | |
384 | } | |
385 | ||
386 | /* Returns pointer to buffer with name NAME, or if NAME is a string of digits | |
387 | returns the buffer whose number equals those digits. Otherwise, returns | |
388 | 0. */ | |
389 | ||
390 | Buffer * | |
391 | buf_exists(name) | |
392 | register char *name; | |
393 | { | |
394 | register Buffer *bp; | |
395 | register int n; | |
396 | ||
397 | if (name == 0) | |
398 | return 0; | |
399 | ||
400 | for (bp = world; bp != 0; bp = bp->b_next) | |
401 | if (strcmp(bp->b_name, name) == 0) | |
402 | return bp; | |
403 | ||
404 | /* Doesn't match any names. Try for a buffer number... */ | |
405 | ||
406 | if ((n = chr_to_int(name, 10, 1)) > 0) { | |
407 | for (bp = world; n > 1; bp = bp->b_next) { | |
408 | if (bp == 0) | |
409 | break; | |
410 | --n; | |
411 | } | |
412 | return bp; | |
413 | } | |
414 | ||
415 | return 0; | |
416 | } | |
417 | ||
418 | /* Returns buffer pointer with a file name NAME, if one exists. Stat's the | |
419 | file and compares inodes, in case NAME is a link, as well as the actual | |
420 | characters that make up the file name. */ | |
421 | ||
422 | Buffer * | |
423 | file_exists(name) | |
424 | register char *name; | |
425 | { | |
426 | struct stat stbuf; | |
427 | register struct stat *s = &stbuf; | |
428 | register Buffer *b = 0; | |
429 | char fnamebuf[FILESIZE]; | |
430 | ||
431 | if (name) { | |
432 | PathParse(name, fnamebuf); | |
433 | if (stat(fnamebuf, s) == -1) | |
434 | s->st_ino = 0; | |
435 | for (b = world; b != 0; b = b->b_next) { | |
436 | if ((b->b_ino != 0 && b->b_ino == s->st_ino) || | |
437 | (strcmp(b->b_fname, fnamebuf) == 0)) | |
438 | break; | |
439 | } | |
440 | } | |
441 | return b; | |
442 | } | |
443 | ||
444 | char * | |
445 | ralloc(obj, size) | |
446 | register char *obj; | |
447 | { | |
448 | register char *new; | |
449 | ||
450 | if (obj) | |
451 | new = realloc(obj, (unsigned) size); | |
452 | if (new == 0 || !obj) | |
453 | new = emalloc(size); | |
454 | return new; | |
455 | } | |
456 | ||
457 | setbname(b, name) | |
458 | register Buffer *b; | |
459 | register char *name; | |
460 | { | |
461 | UpdModLine++; /* Kludge ... but speeds things up considerably */ | |
462 | if (name) { | |
463 | if (b->b_name == NoName) | |
464 | b->b_name = 0; | |
465 | b->b_name = ralloc(b->b_name, strlen(name) + 1); | |
466 | strcpy(b->b_name, name); | |
467 | } else | |
468 | b->b_name = 0; | |
469 | } | |
470 | ||
471 | setfname(b, name) | |
472 | register Buffer *b; | |
473 | register char *name; | |
474 | { | |
475 | char wholename[FILESIZE], | |
476 | oldname[FILESIZE], | |
477 | *oldptr = oldname; | |
478 | Buffer *save = curbuf; | |
479 | ||
480 | SetBuf(b); | |
481 | UpdModLine++; /* Kludge ... but speeds things up considerably */ | |
482 | if (b->b_fname == 0) | |
483 | oldptr = 0; | |
484 | else | |
485 | strcpy(oldname, b->b_fname); | |
486 | if (name) { | |
487 | PathParse(name, wholename); | |
488 | curbuf->b_fname = ralloc(curbuf->b_fname, strlen(wholename) + 1); | |
489 | strcpy(curbuf->b_fname, wholename); | |
490 | } else | |
491 | b->b_fname = 0; | |
492 | DoAutoExec(curbuf->b_fname, oldptr); | |
493 | curbuf->b_mtime = curbuf->b_ino = 0; /* until they're known. */ | |
494 | SetBuf(save); | |
495 | } | |
496 | ||
497 | set_ino(b) | |
498 | register Buffer *b; | |
499 | { | |
500 | struct stat stbuf; | |
501 | ||
502 | if (b->b_fname == 0 || stat(b->b_fname, &stbuf) == -1) { | |
503 | b->b_ino = 0; | |
504 | b->b_mtime = 0; | |
505 | } else { | |
506 | b->b_ino = stbuf.st_ino; | |
507 | b->b_mtime = stbuf.st_mtime; | |
508 | } | |
509 | } | |
510 | ||
511 | /* Find the file `fname' into buf and put in in window `w' */ | |
512 | ||
513 | Buffer * | |
514 | do_find(w, fname, force) | |
515 | register Window *w; | |
516 | register char *fname; | |
517 | { | |
518 | register Buffer *b; | |
519 | ||
520 | b = file_exists(fname); | |
521 | if (b == 0) { | |
522 | b = mak_buf(); | |
523 | setfname(b, fname); | |
524 | bufname(b); | |
525 | set_ino(b); | |
526 | b->b_ntbf = 1; | |
527 | if (force) { | |
528 | Buffer *oldb = curbuf; | |
529 | ||
530 | SetBuf(b); /* this'll read the file */ | |
531 | SetBuf(oldb); | |
532 | } | |
533 | } | |
534 | if (w) | |
535 | tiewind(w, b); | |
536 | return b; | |
537 | } | |
538 | ||
539 | /* Set alternate buffer */ | |
540 | ||
541 | SetABuf(b) | |
542 | Buffer *b; | |
543 | { | |
544 | if (b != 0) | |
545 | lastbuf = b; | |
546 | } | |
547 | ||
548 | SetBuf(newbuf) | |
549 | register Buffer *newbuf; | |
550 | { | |
551 | register Buffer *oldb = curbuf; | |
552 | ||
553 | if (newbuf == curbuf || newbuf == 0) | |
554 | return; | |
555 | ||
556 | lsave(); | |
557 | curbuf = newbuf; | |
558 | getDOT(); | |
559 | /* Do the read now ... */ | |
560 | if (curbuf->b_ntbf) | |
561 | read_file(curbuf->b_fname, 0); | |
562 | ||
563 | #ifdef IPROCS | |
564 | if (oldb != 0 && oldb->b_type != curbuf->b_type) { | |
565 | if (curbuf->b_type == B_IPROCESS) | |
566 | PushPBs(); /* Push process bindings */ | |
567 | else if (oldb->b_type == B_IPROCESS) | |
568 | PopPBs(); | |
569 | } | |
570 | assign_p(); /* Set cur_proc */ | |
571 | #endif | |
572 | } | |
573 | ||
574 | Buffer * | |
575 | do_select(w, name) | |
576 | register Window *w; | |
577 | register char *name; | |
578 | { | |
579 | register Buffer *new; | |
580 | ||
581 | if ((new = buf_exists(name)) == 0) { | |
582 | new = mak_buf(); | |
583 | setfname(new, (char *) 0); | |
584 | setbname(new, name); | |
585 | } | |
586 | if (w) | |
587 | tiewind(w, new); | |
588 | return new; | |
589 | } |