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2791ff57 KB |
1 | /*- |
2 | * Copyright (c) 1980 The Regents of the University of California. | |
3 | * All rights reserved. | |
4 | * | |
5 | * %sccs.include.proprietary.c% | |
70190965 JB |
6 | */ |
7 | ||
8 | #ifndef lint | |
2791ff57 KB |
9 | static char sccsid[] = "@(#)ex_temp.c 7.8 (Berkeley) %G%"; |
10 | #endif /* not lint */ | |
70190965 | 11 | |
d4a8288f MH |
12 | #include "ex.h" |
13 | #include "ex_temp.h" | |
14 | #include "ex_vis.h" | |
15 | #include "ex_tty.h" | |
435e8dff | 16 | #include "pathnames.h" |
d4a8288f MH |
17 | |
18 | /* | |
19 | * Editor temporary file routines. | |
20 | * Very similar to those of ed, except uses 2 input buffers. | |
21 | */ | |
22 | #define READ 0 | |
23 | #define WRITE 1 | |
24 | ||
5a6c967e CH |
25 | #ifndef vms |
26 | #define EPOSITION 7 | |
27 | #else | |
28 | #define EPOSITION 13 | |
29 | #endif | |
30 | ||
d4a8288f MH |
31 | char tfname[40]; |
32 | char rfname[40]; | |
33 | int havetmp; | |
cb3ac212 | 34 | short tfile = -1; |
d4a8288f MH |
35 | short rfile = -1; |
36 | ||
37 | fileinit() | |
38 | { | |
39 | register char *p; | |
40 | register int i, j; | |
41 | struct stat stbuf; | |
42 | ||
44232d5b | 43 | if (tline == INCRMT * (HBLKS+2)) |
d4a8288f MH |
44 | return; |
45 | cleanup(0); | |
5a6c967e CH |
46 | if (tfile >= 0) |
47 | close(tfile); | |
44232d5b MH |
48 | tline = INCRMT * (HBLKS+2); |
49 | blocks[0] = HBLKS; | |
50 | blocks[1] = HBLKS+1; | |
d4a8288f MH |
51 | blocks[2] = -1; |
52 | dirtcnt = 0; | |
53 | iblock = -1; | |
54 | iblock2 = -1; | |
55 | oblock = -1; | |
56 | CP(tfname, svalue(DIRECTORY)); | |
5a6c967e CH |
57 | #ifndef vms |
58 | if (stat(tfname, &stbuf)) | |
59 | #else | |
60 | goto vms_no_check_dir; | |
61 | #endif | |
62 | { | |
d4a8288f MH |
63 | dumbness: |
64 | if (setexit() == 0) | |
65 | filioerr(tfname); | |
66 | else | |
67 | putNFL(); | |
68 | cleanup(1); | |
5a6c967e | 69 | ex_exit(1); |
d4a8288f | 70 | } |
5a6c967e | 71 | #ifndef vms |
d4a8288f MH |
72 | if ((stbuf.st_mode & S_IFMT) != S_IFDIR) { |
73 | errno = ENOTDIR; | |
74 | goto dumbness; | |
75 | } | |
5a6c967e CH |
76 | #else |
77 | vms_no_check_dir: | |
78 | #endif | |
d4a8288f MH |
79 | ichanged = 0; |
80 | ichang2 = 0; | |
5a6c967e | 81 | #ifndef vms |
d4a8288f | 82 | ignore(strcat(tfname, "/ExXXXXX")); |
5a6c967e CH |
83 | #else |
84 | ignore(strcat(tfname, "ExXXXXX")); | |
85 | #endif | |
d4a8288f MH |
86 | for (p = strend(tfname), i = 5, j = getpid(); i > 0; i--, j /= 10) |
87 | *--p = j % 10 | '0'; | |
5a6c967e CH |
88 | #ifdef vms |
89 | ignore(strcat(tfname, ".txt.1")); | |
90 | unlink(tfname); | |
91 | #endif | |
d4a8288f MH |
92 | tfile = creat(tfname, 0600); |
93 | if (tfile < 0) | |
94 | goto dumbness; | |
7c4625ef MH |
95 | #ifdef VMUNIX |
96 | { | |
97 | extern stilinc; /* see below */ | |
98 | stilinc = 0; | |
99 | } | |
100 | #endif | |
d4a8288f | 101 | havetmp = 1; |
5a6c967e CH |
102 | if (tfile >= 0) |
103 | close(tfile); | |
d4a8288f MH |
104 | tfile = open(tfname, 2); |
105 | if (tfile < 0) | |
106 | goto dumbness; | |
5a6c967e | 107 | #ifdef UNIX_SBRK |
d4a8288f | 108 | /* brk((char *)fendcore); */ |
5a6c967e | 109 | #endif |
d4a8288f MH |
110 | } |
111 | ||
112 | cleanup(all) | |
113 | bool all; | |
114 | { | |
115 | if (all) { | |
116 | putpad(TE); | |
117 | flush(); | |
118 | } | |
5a6c967e CH |
119 | if (havetmp) { |
120 | if (tfile >= 0) | |
121 | close(tfile); | |
d4a8288f | 122 | unlink(tfname); |
5a6c967e | 123 | } |
d4a8288f MH |
124 | havetmp = 0; |
125 | if (all && rfile >= 0) { | |
5a6c967e CH |
126 | if (rfile >= 0) |
127 | close(rfile); | |
d4a8288f | 128 | unlink(rfname); |
d4a8288f MH |
129 | rfile = -1; |
130 | } | |
131 | } | |
132 | ||
133 | getline(tl) | |
134 | line tl; | |
135 | { | |
136 | register char *bp, *lp; | |
137 | register int nl; | |
138 | ||
139 | lp = linebuf; | |
140 | bp = getblock(tl, READ); | |
141 | nl = nleft; | |
142 | tl &= ~OFFMSK; | |
143 | while (*lp++ = *bp++) | |
144 | if (--nl == 0) { | |
145 | bp = getblock(tl += INCRMT, READ); | |
146 | nl = nleft; | |
147 | } | |
148 | } | |
149 | ||
150 | putline() | |
151 | { | |
152 | register char *bp, *lp; | |
153 | register int nl; | |
154 | line tl; | |
155 | ||
156 | dirtcnt++; | |
157 | lp = linebuf; | |
158 | change(); | |
159 | tl = tline; | |
160 | bp = getblock(tl, WRITE); | |
161 | nl = nleft; | |
162 | tl &= ~OFFMSK; | |
163 | while (*bp = *lp++) { | |
164 | if (*bp++ == '\n') { | |
165 | *--bp = 0; | |
166 | linebp = lp; | |
167 | break; | |
168 | } | |
169 | if (--nl == 0) { | |
170 | bp = getblock(tl += INCRMT, WRITE); | |
171 | nl = nleft; | |
172 | } | |
173 | } | |
174 | tl = tline; | |
175 | tline += (((lp - linebuf) + BNDRY - 1) >> SHFT) & 077776; | |
176 | return (tl); | |
177 | } | |
178 | ||
179 | int read(); | |
180 | int write(); | |
181 | ||
182 | char * | |
183 | getblock(atl, iof) | |
184 | line atl; | |
185 | int iof; | |
186 | { | |
187 | register int bno, off; | |
188 | ||
189 | bno = (atl >> OFFBTS) & BLKMSK; | |
190 | off = (atl << SHFT) & LBTMSK; | |
191 | if (bno >= NMBLKS) | |
192 | error(" Tmp file too large"); | |
193 | nleft = BUFSIZ - off; | |
194 | if (bno == iblock) { | |
195 | ichanged |= iof; | |
196 | hitin2 = 0; | |
197 | return (ibuff + off); | |
198 | } | |
199 | if (bno == iblock2) { | |
200 | ichang2 |= iof; | |
201 | hitin2 = 1; | |
202 | return (ibuff2 + off); | |
203 | } | |
204 | if (bno == oblock) | |
205 | return (obuff + off); | |
206 | if (iof == READ) { | |
207 | if (hitin2 == 0) { | |
d266c416 | 208 | if (ichang2) { |
d4a8288f | 209 | blkio(iblock2, ibuff2, write); |
d266c416 | 210 | } |
d4a8288f MH |
211 | ichang2 = 0; |
212 | iblock2 = bno; | |
213 | blkio(bno, ibuff2, read); | |
214 | hitin2 = 1; | |
215 | return (ibuff2 + off); | |
216 | } | |
217 | hitin2 = 0; | |
d266c416 | 218 | if (ichanged) { |
d4a8288f | 219 | blkio(iblock, ibuff, write); |
d266c416 | 220 | } |
d4a8288f MH |
221 | ichanged = 0; |
222 | iblock = bno; | |
223 | blkio(bno, ibuff, read); | |
224 | return (ibuff + off); | |
225 | } | |
d266c416 | 226 | if (oblock >= 0) { |
d266c416 MH |
227 | blkio(oblock, obuff, write); |
228 | } | |
d4a8288f MH |
229 | oblock = bno; |
230 | return (obuff + off); | |
231 | } | |
232 | ||
7c4625ef | 233 | #ifdef VMUNIX |
5a6c967e CH |
234 | #ifdef vms |
235 | #define INCORB 32 | |
236 | #else | |
7c4625ef | 237 | #define INCORB 64 |
5a6c967e | 238 | #endif |
7c4625ef MH |
239 | char incorb[INCORB+1][BUFSIZ]; |
240 | #define pagrnd(a) ((char *)(((int)a)&~(BUFSIZ-1))) | |
241 | int stilinc; /* up to here not written yet */ | |
242 | #endif | |
243 | ||
d4a8288f MH |
244 | blkio(b, buf, iofcn) |
245 | short b; | |
246 | char *buf; | |
247 | int (*iofcn)(); | |
248 | { | |
249 | ||
7c4625ef MH |
250 | #ifdef VMUNIX |
251 | if (b < INCORB) { | |
252 | if (iofcn == read) { | |
253 | bcopy(pagrnd(incorb[b+1]), buf, BUFSIZ); | |
254 | return; | |
255 | } | |
256 | bcopy(buf, pagrnd(incorb[b+1]), BUFSIZ); | |
257 | if (laste) { | |
258 | if (b >= stilinc) | |
259 | stilinc = b + 1; | |
260 | return; | |
261 | } | |
262 | } else if (stilinc) | |
263 | tflush(); | |
264 | #endif | |
d4a8288f MH |
265 | lseek(tfile, (long) (unsigned) b * BUFSIZ, 0); |
266 | if ((*iofcn)(tfile, buf, BUFSIZ) != BUFSIZ) | |
267 | filioerr(tfname); | |
268 | } | |
269 | ||
7c4625ef MH |
270 | #ifdef VMUNIX |
271 | tlaste() | |
272 | { | |
273 | ||
274 | if (stilinc) | |
275 | dirtcnt = 0; | |
276 | } | |
277 | ||
278 | tflush() | |
279 | { | |
280 | int i = stilinc; | |
281 | ||
282 | stilinc = 0; | |
283 | lseek(tfile, (long) 0, 0); | |
284 | if (write(tfile, pagrnd(incorb[1]), i * BUFSIZ) != (i * BUFSIZ)) | |
285 | filioerr(tfname); | |
286 | } | |
287 | #endif | |
288 | ||
d4a8288f MH |
289 | /* |
290 | * Synchronize the state of the temporary file in case | |
291 | * a crash occurs. | |
292 | */ | |
293 | synctmp() | |
294 | { | |
295 | register int cnt; | |
296 | register line *a; | |
297 | register short *bp; | |
298 | ||
7c4625ef MH |
299 | #ifdef VMUNIX |
300 | if (stilinc) | |
301 | return; | |
302 | #endif | |
d4a8288f MH |
303 | if (dol == zero) |
304 | return; | |
305 | if (ichanged) | |
306 | blkio(iblock, ibuff, write); | |
307 | ichanged = 0; | |
308 | if (ichang2) | |
309 | blkio(iblock2, ibuff2, write); | |
310 | ichang2 = 0; | |
311 | if (oblock != -1) | |
312 | blkio(oblock, obuff, write); | |
313 | time(&H.Time); | |
314 | uid = getuid(); | |
315 | *zero = (line) H.Time; | |
316 | for (a = zero, bp = blocks; a <= dol; a += BUFSIZ / sizeof *a, bp++) { | |
317 | if (*bp < 0) { | |
318 | tline = (tline + OFFMSK) &~ OFFMSK; | |
319 | *bp = ((tline >> OFFBTS) & BLKMSK); | |
d266c416 MH |
320 | if (*bp > NMBLKS) |
321 | error(" Tmp file too large"); | |
d4a8288f MH |
322 | tline += INCRMT; |
323 | oblock = *bp + 1; | |
324 | bp[1] = -1; | |
325 | } | |
326 | lseek(tfile, (long) (unsigned) *bp * BUFSIZ, 0); | |
327 | cnt = ((dol - a) + 2) * sizeof (line); | |
328 | if (cnt > BUFSIZ) | |
329 | cnt = BUFSIZ; | |
330 | if (write(tfile, (char *) a, cnt) != cnt) { | |
331 | oops: | |
332 | *zero = 0; | |
333 | filioerr(tfname); | |
334 | } | |
335 | *zero = 0; | |
336 | } | |
337 | flines = lineDOL(); | |
338 | lseek(tfile, 0l, 0); | |
339 | if (write(tfile, (char *) &H, sizeof H) != sizeof H) | |
340 | goto oops; | |
a7a51e4a SL |
341 | #ifdef notdef |
342 | /* | |
343 | * This will insure that exrecover gets as much | |
344 | * back after a crash as is absolutely possible, | |
345 | * but can result in pregnant pauses between commands | |
346 | * when the TSYNC call is made, so... | |
347 | */ | |
5a6c967e | 348 | #ifndef vms |
a7a51e4a SL |
349 | (void) fsync(tfile); |
350 | #endif | |
5a6c967e | 351 | #endif |
d4a8288f MH |
352 | } |
353 | ||
354 | TSYNC() | |
355 | { | |
356 | ||
299f2784 | 357 | if (dirtcnt > MAXDIRT) { /* mjm: 12 --> MAXDIRT */ |
7c4625ef MH |
358 | #ifdef VMUNIX |
359 | if (stilinc) | |
360 | tflush(); | |
361 | #endif | |
d4a8288f MH |
362 | dirtcnt = 0; |
363 | synctmp(); | |
364 | } | |
365 | } | |
366 | ||
367 | /* | |
368 | * Named buffer routines. | |
369 | * These are implemented differently than the main buffer. | |
370 | * Each named buffer has a chain of blocks in the register file. | |
371 | * Each block contains roughly 508 chars of text, | |
372 | * and a previous and next block number. We also have information | |
373 | * about which blocks came from deletes of multiple partial lines, | |
374 | * e.g. deleting a sentence or a LISP object. | |
375 | * | |
376 | * We maintain a free map for the temp file. To free the blocks | |
377 | * in a register we must read the blocks to find how they are chained | |
378 | * together. | |
379 | * | |
380 | * BUG: The default savind of deleted lines in numbered | |
381 | * buffers may be rather inefficient; it hasn't been profiled. | |
382 | */ | |
383 | struct strreg { | |
384 | short rg_flags; | |
385 | short rg_nleft; | |
386 | short rg_first; | |
387 | short rg_last; | |
388 | } strregs[('z'-'a'+1) + ('9'-'0'+1)], *strp; | |
389 | ||
390 | struct rbuf { | |
391 | short rb_prev; | |
392 | short rb_next; | |
393 | char rb_text[BUFSIZ - 2 * sizeof (short)]; | |
3c7b865a | 394 | } *rbuf, KILLrbuf, putrbuf, YANKrbuf, regrbuf; |
887e3e0d MH |
395 | #ifdef VMUNIX |
396 | short rused[256]; | |
397 | #else | |
d4a8288f | 398 | short rused[32]; |
887e3e0d | 399 | #endif |
d4a8288f MH |
400 | short rnleft; |
401 | short rblock; | |
402 | short rnext; | |
403 | char *rbufcp; | |
404 | ||
405 | regio(b, iofcn) | |
406 | short b; | |
407 | int (*iofcn)(); | |
408 | { | |
409 | ||
410 | if (rfile == -1) { | |
411 | CP(rfname, tfname); | |
5a6c967e | 412 | *(strend(rfname) - EPOSITION) = 'R'; |
d4a8288f MH |
413 | rfile = creat(rfname, 0600); |
414 | if (rfile < 0) | |
415 | oops: | |
416 | filioerr(rfname); | |
5a6c967e CH |
417 | else |
418 | close(rfile); | |
d4a8288f MH |
419 | rfile = open(rfname, 2); |
420 | if (rfile < 0) | |
421 | goto oops; | |
422 | } | |
423 | lseek(rfile, (long) b * BUFSIZ, 0); | |
424 | if ((*iofcn)(rfile, rbuf, BUFSIZ) != BUFSIZ) | |
425 | goto oops; | |
426 | rblock = b; | |
427 | } | |
428 | ||
429 | REGblk() | |
430 | { | |
431 | register int i, j, m; | |
432 | ||
433 | for (i = 0; i < sizeof rused / sizeof rused[0]; i++) { | |
434 | m = (rused[i] ^ 0177777) & 0177777; | |
435 | if (i == 0) | |
436 | m &= ~1; | |
437 | if (m != 0) { | |
438 | j = 0; | |
439 | while ((m & 1) == 0) | |
440 | j++, m >>= 1; | |
441 | rused[i] |= (1 << j); | |
442 | #ifdef RDEBUG | |
5a6c967e | 443 | ex_printf("allocating block %d\n", i * 16 + j); |
d4a8288f MH |
444 | #endif |
445 | return (i * 16 + j); | |
446 | } | |
447 | } | |
448 | error("Out of register space (ugh)"); | |
449 | /*NOTREACHED*/ | |
450 | } | |
451 | ||
452 | struct strreg * | |
453 | mapreg(c) | |
454 | register int c; | |
455 | { | |
456 | ||
457 | if (isupper(c)) | |
458 | c = tolower(c); | |
459 | return (isdigit(c) ? &strregs[('z'-'a'+1)+(c-'0')] : &strregs[c-'a']); | |
460 | } | |
461 | ||
462 | int shread(); | |
463 | ||
464 | KILLreg(c) | |
465 | register int c; | |
466 | { | |
d4a8288f MH |
467 | register struct strreg *sp; |
468 | ||
3c7b865a | 469 | rbuf = &KILLrbuf; |
d4a8288f MH |
470 | sp = mapreg(c); |
471 | rblock = sp->rg_first; | |
472 | sp->rg_first = sp->rg_last = 0; | |
473 | sp->rg_flags = sp->rg_nleft = 0; | |
474 | while (rblock != 0) { | |
475 | #ifdef RDEBUG | |
5a6c967e | 476 | ex_printf("freeing block %d\n", rblock); |
d4a8288f MH |
477 | #endif |
478 | rused[rblock / 16] &= ~(1 << (rblock % 16)); | |
479 | regio(rblock, shread); | |
480 | rblock = rbuf->rb_next; | |
481 | } | |
482 | } | |
483 | ||
484 | /*VARARGS*/ | |
485 | shread() | |
486 | { | |
487 | struct front { short a; short b; }; | |
488 | ||
489 | if (read(rfile, (char *) rbuf, sizeof (struct front)) == sizeof (struct front)) | |
490 | return (sizeof (struct rbuf)); | |
491 | return (0); | |
492 | } | |
493 | ||
494 | int getREG(); | |
495 | ||
496 | putreg(c) | |
497 | char c; | |
498 | { | |
d4a8288f MH |
499 | register line *odot = dot; |
500 | register line *odol = dol; | |
501 | register int cnt; | |
502 | ||
503 | deletenone(); | |
504 | appendnone(); | |
3c7b865a | 505 | rbuf = &putrbuf; |
d4a8288f MH |
506 | rnleft = 0; |
507 | rblock = 0; | |
508 | rnext = mapreg(c)->rg_first; | |
509 | if (rnext == 0) { | |
510 | if (inopen) { | |
511 | splitw++; | |
512 | vclean(); | |
513 | vgoto(WECHO, 0); | |
514 | } | |
515 | vreg = -1; | |
516 | error("Nothing in register %c", c); | |
517 | } | |
518 | if (inopen && partreg(c)) { | |
887e3e0d MH |
519 | if (!FIXUNDO) { |
520 | splitw++; vclean(); vgoto(WECHO, 0); vreg = -1; | |
521 | error("Can't put partial line inside macro"); | |
522 | } | |
d4a8288f MH |
523 | squish(); |
524 | addr1 = addr2 = dol; | |
525 | } | |
887e3e0d | 526 | cnt = append(getREG, addr2); |
d4a8288f MH |
527 | if (inopen && partreg(c)) { |
528 | unddol = dol; | |
529 | dol = odol; | |
530 | dot = odot; | |
531 | pragged(0); | |
532 | } | |
d4a8288f MH |
533 | killcnt(cnt); |
534 | notecnt = cnt; | |
535 | } | |
536 | ||
537 | partreg(c) | |
538 | char c; | |
539 | { | |
540 | ||
541 | return (mapreg(c)->rg_flags); | |
542 | } | |
543 | ||
544 | notpart(c) | |
545 | register int c; | |
546 | { | |
547 | ||
548 | if (c) | |
549 | mapreg(c)->rg_flags = 0; | |
550 | } | |
551 | ||
552 | getREG() | |
553 | { | |
554 | register char *lp = linebuf; | |
555 | register int c; | |
556 | ||
557 | for (;;) { | |
558 | if (rnleft == 0) { | |
559 | if (rnext == 0) | |
560 | return (EOF); | |
561 | regio(rnext, read); | |
562 | rnext = rbuf->rb_next; | |
563 | rbufcp = rbuf->rb_text; | |
564 | rnleft = sizeof rbuf->rb_text; | |
565 | } | |
566 | c = *rbufcp; | |
567 | if (c == 0) | |
568 | return (EOF); | |
569 | rbufcp++, --rnleft; | |
570 | if (c == '\n') { | |
571 | *lp++ = 0; | |
572 | return (0); | |
573 | } | |
574 | *lp++ = c; | |
575 | } | |
576 | } | |
577 | ||
578 | YANKreg(c) | |
579 | register int c; | |
580 | { | |
d4a8288f MH |
581 | register line *addr; |
582 | register struct strreg *sp; | |
f0f2d980 | 583 | char savelb[LBSIZE]; |
d4a8288f MH |
584 | |
585 | if (isdigit(c)) | |
586 | kshift(); | |
587 | if (islower(c)) | |
588 | KILLreg(c); | |
589 | strp = sp = mapreg(c); | |
590 | sp->rg_flags = inopen && cursor && wcursor; | |
3c7b865a | 591 | rbuf = &YANKrbuf; |
d4a8288f MH |
592 | if (sp->rg_last) { |
593 | regio(sp->rg_last, read); | |
594 | rnleft = sp->rg_nleft; | |
595 | rbufcp = &rbuf->rb_text[sizeof rbuf->rb_text - rnleft]; | |
596 | } else { | |
597 | rblock = 0; | |
598 | rnleft = 0; | |
599 | } | |
f0f2d980 | 600 | CP(savelb,linebuf); |
d4a8288f MH |
601 | for (addr = addr1; addr <= addr2; addr++) { |
602 | getline(*addr); | |
603 | if (sp->rg_flags) { | |
604 | if (addr == addr2) | |
605 | *wcursor = 0; | |
606 | if (addr == addr1) | |
607 | strcpy(linebuf, cursor); | |
608 | } | |
609 | YANKline(); | |
610 | } | |
611 | rbflush(); | |
612 | killed(); | |
f0f2d980 | 613 | CP(linebuf,savelb); |
d4a8288f MH |
614 | } |
615 | ||
616 | kshift() | |
617 | { | |
618 | register int i; | |
619 | ||
620 | KILLreg('9'); | |
621 | for (i = '8'; i >= '0'; i--) | |
622 | copy(mapreg(i+1), mapreg(i), sizeof (struct strreg)); | |
623 | } | |
624 | ||
625 | YANKline() | |
626 | { | |
627 | register char *lp = linebuf; | |
628 | register struct rbuf *rp = rbuf; | |
629 | register int c; | |
630 | ||
631 | do { | |
632 | c = *lp++; | |
633 | if (c == 0) | |
634 | c = '\n'; | |
635 | if (rnleft == 0) { | |
636 | rp->rb_next = REGblk(); | |
637 | rbflush(); | |
638 | rblock = rp->rb_next; | |
639 | rp->rb_next = 0; | |
640 | rp->rb_prev = rblock; | |
641 | rnleft = sizeof rp->rb_text; | |
642 | rbufcp = rp->rb_text; | |
643 | } | |
644 | *rbufcp++ = c; | |
645 | --rnleft; | |
646 | } while (c != '\n'); | |
647 | if (rnleft) | |
648 | *rbufcp = 0; | |
649 | } | |
650 | ||
651 | rbflush() | |
652 | { | |
653 | register struct strreg *sp = strp; | |
654 | ||
655 | if (rblock == 0) | |
656 | return; | |
657 | regio(rblock, write); | |
658 | if (sp->rg_first == 0) | |
659 | sp->rg_first = rblock; | |
660 | sp->rg_last = rblock; | |
661 | sp->rg_nleft = rnleft; | |
662 | } | |
663 | ||
664 | /* Register c to char buffer buf of size buflen */ | |
665 | regbuf(c, buf, buflen) | |
666 | char c; | |
667 | char *buf; | |
668 | int buflen; | |
669 | { | |
d4a8288f MH |
670 | register char *p, *lp; |
671 | ||
3c7b865a | 672 | rbuf = ®rbuf; |
d4a8288f MH |
673 | rnleft = 0; |
674 | rblock = 0; | |
675 | rnext = mapreg(c)->rg_first; | |
676 | if (rnext==0) { | |
677 | *buf = 0; | |
678 | error("Nothing in register %c",c); | |
679 | } | |
680 | p = buf; | |
681 | while (getREG()==0) { | |
682 | for (lp=linebuf; *lp;) { | |
683 | if (p >= &buf[buflen]) | |
684 | error("Register too long@to fit in memory"); | |
685 | *p++ = *lp++; | |
686 | } | |
687 | *p++ = '\n'; | |
688 | } | |
689 | if (partreg(c)) p--; | |
690 | *p = '\0'; | |
691 | getDOT(); | |
692 | } | |
d266c416 MH |
693 | |
694 | /* | |
695 | * Encryption routines. These are essentially unmodified from ed. | |
696 | */ | |
697 |