Commit | Line | Data |
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205a2d85 | 1 | #ifndef lint |
f103e0a6 | 2 | static char sccsid[] = "@(#)ed.c 4.13 (Berkeley) %G%"; |
205a2d85 | 3 | #endif |
31e58db8 KM |
4 | |
5 | /* | |
6 | * Editor | |
7 | */ | |
8 | ||
f103e0a6 | 9 | #include <sys/param.h> |
0deb4896 | 10 | #include <sys/signal.h> |
31e58db8 | 11 | #include <sgtty.h> |
2dd1db50 | 12 | #undef CEOF |
31e58db8 | 13 | #include <setjmp.h> |
dc891cfc KB |
14 | #include "pathnames.h" |
15 | ||
31e58db8 | 16 | #define NULL 0 |
31e58db8 KM |
17 | #define LBSIZE 512 |
18 | #define ESIZE 128 | |
19 | #define GBSIZE 256 | |
20 | #define NBRA 5 | |
21 | #define EOF -1 | |
31e58db8 KM |
22 | |
23 | #define CBRA 1 | |
24 | #define CCHR 2 | |
25 | #define CDOT 4 | |
26 | #define CCL 6 | |
27 | #define NCCL 8 | |
28 | #define CDOL 10 | |
29 | #define CEOF 11 | |
30 | #define CKET 12 | |
31 | #define CBACK 14 | |
32 | ||
33 | #define STAR 01 | |
34 | ||
35 | char Q[] = ""; | |
36 | char T[] = "TMP"; | |
37 | #define READ 0 | |
38 | #define WRITE 1 | |
39 | ||
40 | int peekc; | |
41 | int lastc; | |
4c98207c KB |
42 | char savedfile[MAXPATHLEN]; |
43 | char file[MAXPATHLEN]; | |
31e58db8 KM |
44 | char linebuf[LBSIZE]; |
45 | char rhsbuf[LBSIZE/2]; | |
46 | char expbuf[ESIZE+4]; | |
47 | int circfl; | |
48 | int *zero; | |
49 | int *dot; | |
50 | int *dol; | |
51 | int *addr1; | |
52 | int *addr2; | |
53 | char genbuf[LBSIZE]; | |
54 | long count; | |
55 | char *nextip; | |
56 | char *linebp; | |
57 | int ninbuf; | |
58 | int io; | |
59 | int pflag; | |
60 | long lseek(); | |
0deb4896 KB |
61 | sig_t oldhup; |
62 | sig_t oldquit; | |
31e58db8 | 63 | int vflag = 1; |
62793f1c | 64 | |
62793f1c | 65 | |
31e58db8 KM |
66 | int listf; |
67 | int col; | |
68 | char *globp; | |
69 | int tfile = -1; | |
70 | int tline; | |
54e0d068 | 71 | char tfname[sizeof(_PATH_TMP) + 20]; |
31e58db8 KM |
72 | char *loc1; |
73 | char *loc2; | |
74 | char *locs; | |
75 | char ibuff[512]; | |
76 | int iblock = -1; | |
77 | char obuff[512]; | |
78 | int oblock = -1; | |
79 | int ichanged; | |
80 | int nleft; | |
81 | char WRERR[] = "WRITE ERROR"; | |
82 | int names[26]; | |
83 | int anymarks; | |
84 | char *braslist[NBRA]; | |
85 | char *braelist[NBRA]; | |
86 | int nbra; | |
87 | int subnewa; | |
88 | int subolda; | |
89 | int fchange; | |
90 | int wrapp; | |
91 | unsigned nlall = 128; | |
92 | ||
93 | int *address(); | |
94 | char *getline(); | |
95 | char *getblock(); | |
96 | char *place(); | |
97 | char *mktemp(); | |
98 | char *malloc(); | |
99 | char *realloc(); | |
100 | jmp_buf savej; | |
101 | ||
102 | main(argc, argv) | |
103 | char **argv; | |
104 | { | |
105 | register char *p1, *p2; | |
0deb4896 KB |
106 | extern void onintr(), quit(), onhup(); |
107 | sig_t oldintr; | |
31e58db8 KM |
108 | |
109 | oldquit = signal(SIGQUIT, SIG_IGN); | |
110 | oldhup = signal(SIGHUP, SIG_IGN); | |
111 | oldintr = signal(SIGINT, SIG_IGN); | |
112 | if ((int)signal(SIGTERM, SIG_IGN) == 0) | |
113 | signal(SIGTERM, quit); | |
114 | argv++; | |
115 | while (argc > 1 && **argv=='-') { | |
116 | switch((*argv)[1]) { | |
117 | ||
118 | case '\0': | |
119 | vflag = 0; | |
120 | break; | |
121 | ||
122 | case 'q': | |
123 | signal(SIGQUIT, SIG_DFL); | |
124 | vflag = 1; | |
125 | break; | |
126 | ||
31e58db8 KM |
127 | } |
128 | argv++; | |
129 | argc--; | |
130 | } | |
31e58db8 KM |
131 | |
132 | if (argc>1) { | |
133 | p1 = *argv; | |
134 | p2 = savedfile; | |
135 | while (*p2++ = *p1++) | |
136 | ; | |
137 | globp = "r"; | |
138 | } | |
139 | zero = (int *)malloc(nlall*sizeof(int)); | |
54e0d068 KB |
140 | (void)strcpy(tfname, _PATH_TMP); |
141 | (void)strcat(tfname, "_edXXXXXX"); | |
142 | (void)mktemp(tfname); | |
31e58db8 KM |
143 | init(); |
144 | if (((int)oldintr&01) == 0) | |
145 | signal(SIGINT, onintr); | |
146 | if (((int)oldhup&01) == 0) | |
147 | signal(SIGHUP, onhup); | |
148 | setjmp(savej); | |
149 | commands(); | |
150 | quit(); | |
151 | } | |
152 | ||
153 | commands() | |
154 | { | |
155 | int getfile(), gettty(); | |
156 | register *a1, c; | |
157 | ||
158 | for (;;) { | |
159 | if (pflag) { | |
160 | pflag = 0; | |
161 | addr1 = addr2 = dot; | |
162 | goto print; | |
163 | } | |
164 | addr1 = 0; | |
165 | addr2 = 0; | |
166 | do { | |
167 | addr1 = addr2; | |
168 | if ((a1 = address())==0) { | |
169 | c = getchr(); | |
170 | break; | |
171 | } | |
172 | addr2 = a1; | |
173 | if ((c=getchr()) == ';') { | |
174 | c = ','; | |
175 | dot = a1; | |
176 | } | |
177 | } while (c==','); | |
178 | if (addr1==0) | |
179 | addr1 = addr2; | |
180 | switch(c) { | |
181 | ||
182 | case 'a': | |
183 | setdot(); | |
184 | newline(); | |
185 | append(gettty, addr2); | |
186 | continue; | |
187 | ||
188 | case 'c': | |
189 | delete(); | |
190 | append(gettty, addr1-1); | |
191 | continue; | |
192 | ||
193 | case 'd': | |
194 | delete(); | |
195 | continue; | |
196 | ||
197 | case 'E': | |
198 | fchange = 0; | |
199 | c = 'e'; | |
200 | case 'e': | |
201 | setnoaddr(); | |
202 | if (vflag && fchange) { | |
203 | fchange = 0; | |
204 | error(Q); | |
205 | } | |
206 | filename(c); | |
207 | init(); | |
208 | addr2 = zero; | |
209 | goto caseread; | |
210 | ||
211 | case 'f': | |
212 | setnoaddr(); | |
213 | filename(c); | |
214 | puts(savedfile); | |
215 | continue; | |
216 | ||
217 | case 'g': | |
218 | global(1); | |
219 | continue; | |
220 | ||
221 | case 'i': | |
222 | setdot(); | |
223 | nonzero(); | |
224 | newline(); | |
225 | append(gettty, addr2-1); | |
226 | continue; | |
227 | ||
228 | ||
229 | case 'j': | |
230 | if (addr2==0) { | |
231 | addr1 = dot; | |
232 | addr2 = dot+1; | |
233 | } | |
234 | setdot(); | |
235 | newline(); | |
236 | nonzero(); | |
237 | join(); | |
238 | continue; | |
239 | ||
240 | case 'k': | |
241 | if ((c = getchr()) < 'a' || c > 'z') | |
242 | error(Q); | |
243 | newline(); | |
244 | setdot(); | |
245 | nonzero(); | |
246 | names[c-'a'] = *addr2 & ~01; | |
247 | anymarks |= 01; | |
248 | continue; | |
249 | ||
250 | case 'm': | |
251 | move(0); | |
252 | continue; | |
253 | ||
254 | case '\n': | |
255 | if (addr2==0) | |
256 | addr2 = dot+1; | |
257 | addr1 = addr2; | |
258 | goto print; | |
259 | ||
260 | case 'l': | |
261 | listf++; | |
262 | case 'p': | |
263 | case 'P': | |
264 | newline(); | |
265 | print: | |
266 | setdot(); | |
267 | nonzero(); | |
268 | a1 = addr1; | |
269 | do { | |
270 | puts(getline(*a1++)); | |
271 | } while (a1 <= addr2); | |
272 | dot = addr2; | |
273 | listf = 0; | |
274 | continue; | |
275 | ||
276 | case 'Q': | |
277 | fchange = 0; | |
278 | case 'q': | |
279 | setnoaddr(); | |
280 | newline(); | |
281 | quit(); | |
282 | ||
283 | case 'r': | |
284 | filename(c); | |
285 | caseread: | |
286 | if ((io = open(file, 0)) < 0) { | |
287 | lastc = '\n'; | |
288 | error(file); | |
289 | } | |
290 | setall(); | |
291 | ninbuf = 0; | |
292 | c = zero != dol; | |
293 | append(getfile, addr2); | |
294 | exfile(); | |
295 | fchange = c; | |
296 | continue; | |
297 | ||
298 | case 's': | |
299 | setdot(); | |
300 | nonzero(); | |
301 | substitute(globp!=0); | |
302 | continue; | |
303 | ||
304 | case 't': | |
305 | move(1); | |
306 | continue; | |
307 | ||
308 | case 'u': | |
309 | setdot(); | |
310 | nonzero(); | |
311 | newline(); | |
312 | if ((*addr2&~01) != subnewa) | |
313 | error(Q); | |
314 | *addr2 = subolda; | |
315 | dot = addr2; | |
316 | continue; | |
317 | ||
318 | case 'v': | |
319 | global(0); | |
320 | continue; | |
321 | ||
322 | case 'W': | |
323 | wrapp++; | |
324 | case 'w': | |
325 | setall(); | |
326 | nonzero(); | |
327 | filename(c); | |
328 | if(!wrapp || | |
329 | ((io = open(file,1)) == -1) || | |
330 | ((lseek(io, 0L, 2)) == -1)) | |
331 | if ((io = creat(file, 0666)) < 0) | |
332 | error(file); | |
333 | wrapp = 0; | |
334 | putfile(); | |
335 | exfile(); | |
336 | if (addr1==zero+1 && addr2==dol) | |
337 | fchange = 0; | |
338 | continue; | |
339 | ||
31e58db8 KM |
340 | |
341 | ||
342 | case '=': | |
343 | setall(); | |
344 | newline(); | |
345 | count = (addr2-zero)&077777; | |
346 | putd(); | |
347 | putchr('\n'); | |
348 | continue; | |
349 | ||
350 | case '!': | |
351 | callunix(); | |
352 | continue; | |
353 | ||
354 | case EOF: | |
355 | return; | |
356 | ||
357 | } | |
358 | error(Q); | |
359 | } | |
360 | } | |
361 | ||
362 | int * | |
363 | address() | |
364 | { | |
365 | register *a1, minus, c; | |
366 | int n, relerr; | |
367 | ||
368 | minus = 0; | |
369 | a1 = 0; | |
370 | for (;;) { | |
371 | c = getchr(); | |
372 | if ('0'<=c && c<='9') { | |
373 | n = 0; | |
374 | do { | |
375 | n *= 10; | |
376 | n += c - '0'; | |
377 | } while ((c = getchr())>='0' && c<='9'); | |
378 | peekc = c; | |
379 | if (a1==0) | |
380 | a1 = zero; | |
381 | if (minus<0) | |
382 | n = -n; | |
383 | a1 += n; | |
384 | minus = 0; | |
385 | continue; | |
386 | } | |
387 | relerr = 0; | |
388 | if (a1 || minus) | |
389 | relerr++; | |
390 | switch(c) { | |
391 | case ' ': | |
392 | case '\t': | |
393 | continue; | |
394 | ||
395 | case '+': | |
396 | minus++; | |
397 | if (a1==0) | |
398 | a1 = dot; | |
399 | continue; | |
400 | ||
401 | case '-': | |
402 | case '^': | |
403 | minus--; | |
404 | if (a1==0) | |
405 | a1 = dot; | |
406 | continue; | |
407 | ||
408 | case '?': | |
409 | case '/': | |
410 | compile(c); | |
411 | a1 = dot; | |
412 | for (;;) { | |
413 | if (c=='/') { | |
414 | a1++; | |
415 | if (a1 > dol) | |
416 | a1 = zero; | |
417 | } else { | |
418 | a1--; | |
419 | if (a1 < zero) | |
420 | a1 = dol; | |
421 | } | |
422 | if (execute(0, a1)) | |
423 | break; | |
424 | if (a1==dot) | |
425 | error(Q); | |
426 | } | |
427 | break; | |
428 | ||
429 | case '$': | |
430 | a1 = dol; | |
431 | break; | |
432 | ||
433 | case '.': | |
434 | a1 = dot; | |
435 | break; | |
436 | ||
437 | case '\'': | |
438 | if ((c = getchr()) < 'a' || c > 'z') | |
439 | error(Q); | |
440 | for (a1=zero; a1<=dol; a1++) | |
441 | if (names[c-'a'] == (*a1 & ~01)) | |
442 | break; | |
443 | break; | |
444 | ||
445 | default: | |
446 | peekc = c; | |
447 | if (a1==0) | |
448 | return(0); | |
449 | a1 += minus; | |
450 | if (a1<zero || a1>dol) | |
451 | error(Q); | |
452 | return(a1); | |
453 | } | |
454 | if (relerr) | |
455 | error(Q); | |
456 | } | |
457 | } | |
458 | ||
459 | setdot() | |
460 | { | |
461 | if (addr2 == 0) | |
462 | addr1 = addr2 = dot; | |
463 | if (addr1 > addr2) | |
464 | error(Q); | |
465 | } | |
466 | ||
467 | setall() | |
468 | { | |
469 | if (addr2==0) { | |
470 | addr1 = zero+1; | |
471 | addr2 = dol; | |
472 | if (dol==zero) | |
473 | addr1 = zero; | |
474 | } | |
475 | setdot(); | |
476 | } | |
477 | ||
478 | setnoaddr() | |
479 | { | |
480 | if (addr2) | |
481 | error(Q); | |
482 | } | |
483 | ||
484 | nonzero() | |
485 | { | |
486 | if (addr1<=zero || addr2>dol) | |
487 | error(Q); | |
488 | } | |
489 | ||
490 | newline() | |
491 | { | |
492 | register c; | |
493 | ||
494 | if ((c = getchr()) == '\n') | |
495 | return; | |
496 | if (c=='p' || c=='l') { | |
497 | pflag++; | |
498 | if (c=='l') | |
499 | listf++; | |
500 | if (getchr() == '\n') | |
501 | return; | |
502 | } | |
503 | error(Q); | |
504 | } | |
505 | ||
506 | filename(comm) | |
507 | { | |
508 | register char *p1, *p2; | |
509 | register c; | |
510 | ||
511 | count = 0; | |
512 | c = getchr(); | |
513 | if (c=='\n' || c==EOF) { | |
514 | p1 = savedfile; | |
515 | if (*p1==0 && comm!='f') | |
516 | error(Q); | |
517 | p2 = file; | |
518 | while (*p2++ = *p1++) | |
519 | ; | |
520 | return; | |
521 | } | |
522 | if (c!=' ') | |
523 | error(Q); | |
524 | while ((c = getchr()) == ' ') | |
525 | ; | |
526 | if (c=='\n') | |
527 | error(Q); | |
528 | p1 = file; | |
529 | do { | |
530 | *p1++ = c; | |
531 | if (c==' ' || c==EOF) | |
532 | error(Q); | |
533 | } while ((c = getchr()) != '\n'); | |
534 | *p1++ = 0; | |
535 | if (savedfile[0]==0 || comm=='e' || comm=='f') { | |
536 | p1 = savedfile; | |
537 | p2 = file; | |
538 | while (*p1++ = *p2++) | |
539 | ; | |
540 | } | |
541 | } | |
542 | ||
543 | exfile() | |
544 | { | |
545 | close(io); | |
546 | io = -1; | |
547 | if (vflag) { | |
548 | putd(); | |
549 | putchr('\n'); | |
550 | } | |
551 | } | |
552 | ||
0deb4896 | 553 | void |
31e58db8 KM |
554 | onintr() |
555 | { | |
0deb4896 | 556 | /* not necessary: (void)signal(SIGINT, onintr); */ |
31e58db8 KM |
557 | putchr('\n'); |
558 | lastc = '\n'; | |
559 | error(Q); | |
560 | } | |
561 | ||
0deb4896 | 562 | void |
31e58db8 KM |
563 | onhup() |
564 | { | |
0deb4896 KB |
565 | /* not necessary: (void)signal(SIGINT, SIG_IGN); */ |
566 | /* not necessary: (void)signal(SIGHUP, SIG_IGN); */ | |
31e58db8 KM |
567 | if (dol > zero) { |
568 | addr1 = zero+1; | |
569 | addr2 = dol; | |
570 | io = creat("ed.hup", 0666); | |
571 | if (io > 0) | |
572 | putfile(); | |
573 | } | |
574 | fchange = 0; | |
575 | quit(); | |
576 | } | |
577 | ||
578 | error(s) | |
579 | char *s; | |
580 | { | |
581 | register c; | |
582 | ||
583 | wrapp = 0; | |
584 | listf = 0; | |
585 | putchr('?'); | |
586 | puts(s); | |
587 | count = 0; | |
588 | lseek(0, (long)0, 2); | |
589 | pflag = 0; | |
590 | if (globp) | |
591 | lastc = '\n'; | |
592 | globp = 0; | |
593 | peekc = lastc; | |
594 | if(lastc) | |
595 | while ((c = getchr()) != '\n' && c != EOF) | |
596 | ; | |
597 | if (io > 0) { | |
598 | close(io); | |
599 | io = -1; | |
600 | } | |
601 | longjmp(savej, 1); | |
602 | } | |
603 | ||
604 | getchr() | |
605 | { | |
606 | char c; | |
607 | if (lastc=peekc) { | |
608 | peekc = 0; | |
609 | return(lastc); | |
610 | } | |
611 | if (globp) { | |
612 | if ((lastc = *globp++) != 0) | |
613 | return(lastc); | |
614 | globp = 0; | |
615 | return(EOF); | |
616 | } | |
617 | if (read(0, &c, 1) <= 0) | |
618 | return(lastc = EOF); | |
619 | lastc = c&0177; | |
620 | return(lastc); | |
621 | } | |
622 | ||
623 | gettty() | |
624 | { | |
625 | register c; | |
626 | register char *gf; | |
627 | register char *p; | |
628 | ||
629 | p = linebuf; | |
630 | gf = globp; | |
631 | while ((c = getchr()) != '\n') { | |
632 | if (c==EOF) { | |
633 | if (gf) | |
634 | peekc = c; | |
635 | return(c); | |
636 | } | |
637 | if ((c &= 0177) == 0) | |
638 | continue; | |
639 | *p++ = c; | |
640 | if (p >= &linebuf[LBSIZE-2]) | |
641 | error(Q); | |
642 | } | |
643 | *p++ = 0; | |
644 | if (linebuf[0]=='.' && linebuf[1]==0) | |
645 | return(EOF); | |
646 | return(0); | |
647 | } | |
648 | ||
649 | getfile() | |
650 | { | |
651 | register c; | |
652 | register char *lp, *fp; | |
653 | ||
654 | lp = linebuf; | |
655 | fp = nextip; | |
656 | do { | |
657 | if (--ninbuf < 0) { | |
658 | if ((ninbuf = read(io, genbuf, LBSIZE)-1) < 0) | |
659 | return(EOF); | |
660 | fp = genbuf; | |
661 | while(fp < &genbuf[ninbuf]) { | |
662 | if (*fp++ & 0200) { | |
31e58db8 KM |
663 | break; |
664 | } | |
665 | } | |
666 | fp = genbuf; | |
667 | } | |
668 | c = *fp++; | |
669 | if (c=='\0') | |
670 | continue; | |
671 | if (c&0200 || lp >= &linebuf[LBSIZE]) { | |
672 | lastc = '\n'; | |
673 | error(Q); | |
674 | } | |
675 | *lp++ = c; | |
676 | count++; | |
677 | } while (c != '\n'); | |
678 | *--lp = 0; | |
679 | nextip = fp; | |
680 | return(0); | |
681 | } | |
682 | ||
683 | putfile() | |
684 | { | |
685 | int *a1, n; | |
686 | register char *fp, *lp; | |
687 | register nib; | |
688 | ||
689 | nib = 512; | |
690 | fp = genbuf; | |
691 | a1 = addr1; | |
692 | do { | |
693 | lp = getline(*a1++); | |
694 | for (;;) { | |
695 | if (--nib < 0) { | |
696 | n = fp-genbuf; | |
31e58db8 KM |
697 | if(write(io, genbuf, n) != n) { |
698 | puts(WRERR); | |
699 | error(Q); | |
700 | } | |
701 | nib = 511; | |
702 | fp = genbuf; | |
703 | } | |
704 | count++; | |
705 | if ((*fp++ = *lp++) == 0) { | |
706 | fp[-1] = '\n'; | |
707 | break; | |
708 | } | |
709 | } | |
710 | } while (a1 <= addr2); | |
711 | n = fp-genbuf; | |
31e58db8 KM |
712 | if(write(io, genbuf, n) != n) { |
713 | puts(WRERR); | |
714 | error(Q); | |
715 | } | |
716 | } | |
717 | ||
718 | append(f, a) | |
719 | int *a; | |
720 | int (*f)(); | |
721 | { | |
722 | register *a1, *a2, *rdot; | |
723 | int nline, tl; | |
724 | ||
725 | nline = 0; | |
726 | dot = a; | |
727 | while ((*f)() == 0) { | |
728 | if ((dol-zero)+1 >= nlall) { | |
729 | int *ozero = zero; | |
730 | nlall += 512; | |
31e58db8 KM |
731 | if ((zero = (int *)realloc((char *)zero, nlall*sizeof(int)))==NULL) { |
732 | lastc = '\n'; | |
733 | zero = ozero; | |
734 | error("MEM?"); | |
735 | } | |
736 | dot += zero - ozero; | |
737 | dol += zero - ozero; | |
738 | } | |
739 | tl = putline(); | |
740 | nline++; | |
741 | a1 = ++dol; | |
742 | a2 = a1+1; | |
743 | rdot = ++dot; | |
744 | while (a1 > rdot) | |
745 | *--a2 = *--a1; | |
746 | *rdot = tl; | |
747 | } | |
748 | return(nline); | |
749 | } | |
750 | ||
751 | callunix() | |
752 | { | |
0deb4896 KB |
753 | register sig_t savint; |
754 | register int pid, rpid; | |
31e58db8 KM |
755 | int retcode; |
756 | ||
757 | setnoaddr(); | |
758 | if ((pid = fork()) == 0) { | |
759 | signal(SIGHUP, oldhup); | |
760 | signal(SIGQUIT, oldquit); | |
dc891cfc | 761 | execl(_PATH_BSHELL, "sh", "-t", 0); |
31e58db8 KM |
762 | exit(0100); |
763 | } | |
764 | savint = signal(SIGINT, SIG_IGN); | |
765 | while ((rpid = wait(&retcode)) != pid && rpid != -1) | |
766 | ; | |
767 | signal(SIGINT, savint); | |
768 | puts("!"); | |
769 | } | |
770 | ||
0deb4896 | 771 | void |
31e58db8 KM |
772 | quit() |
773 | { | |
774 | if (vflag && fchange && dol!=zero) { | |
775 | fchange = 0; | |
776 | error(Q); | |
777 | } | |
778 | unlink(tfname); | |
779 | exit(0); | |
780 | } | |
781 | ||
782 | delete() | |
783 | { | |
784 | setdot(); | |
785 | newline(); | |
786 | nonzero(); | |
787 | rdelete(addr1, addr2); | |
788 | } | |
789 | ||
790 | rdelete(ad1, ad2) | |
791 | int *ad1, *ad2; | |
792 | { | |
793 | register *a1, *a2, *a3; | |
794 | ||
795 | a1 = ad1; | |
796 | a2 = ad2+1; | |
797 | a3 = dol; | |
798 | dol -= a2 - a1; | |
799 | do { | |
800 | *a1++ = *a2++; | |
801 | } while (a2 <= a3); | |
802 | a1 = ad1; | |
803 | if (a1 > dol) | |
804 | a1 = dol; | |
805 | dot = a1; | |
806 | fchange = 1; | |
807 | } | |
808 | ||
809 | gdelete() | |
810 | { | |
811 | register *a1, *a2, *a3; | |
812 | ||
813 | a3 = dol; | |
814 | for (a1=zero+1; (*a1&01)==0; a1++) | |
815 | if (a1>=a3) | |
816 | return; | |
817 | for (a2=a1+1; a2<=a3;) { | |
818 | if (*a2&01) { | |
819 | a2++; | |
820 | dot = a1; | |
821 | } else | |
822 | *a1++ = *a2++; | |
823 | } | |
824 | dol = a1-1; | |
825 | if (dot>dol) | |
826 | dot = dol; | |
827 | fchange = 1; | |
828 | } | |
829 | ||
830 | char * | |
831 | getline(tl) | |
832 | { | |
833 | register char *bp, *lp; | |
834 | register nl; | |
835 | ||
836 | lp = linebuf; | |
837 | bp = getblock(tl, READ); | |
838 | nl = nleft; | |
839 | tl &= ~0377; | |
840 | while (*lp++ = *bp++) | |
841 | if (--nl == 0) { | |
842 | bp = getblock(tl+=0400, READ); | |
843 | nl = nleft; | |
844 | } | |
845 | return(linebuf); | |
846 | } | |
847 | ||
848 | putline() | |
849 | { | |
850 | register char *bp, *lp; | |
851 | register nl; | |
852 | int tl; | |
853 | ||
854 | fchange = 1; | |
855 | lp = linebuf; | |
856 | tl = tline; | |
857 | bp = getblock(tl, WRITE); | |
858 | nl = nleft; | |
859 | tl &= ~0377; | |
860 | while (*bp = *lp++) { | |
861 | if (*bp++ == '\n') { | |
862 | *--bp = 0; | |
863 | linebp = lp; | |
864 | break; | |
865 | } | |
866 | if (--nl == 0) { | |
867 | bp = getblock(tl+=0400, WRITE); | |
868 | nl = nleft; | |
869 | } | |
870 | } | |
871 | nl = tline; | |
872 | tline += (((lp-linebuf)+03)>>1)&077776; | |
873 | return(nl); | |
874 | } | |
875 | ||
876 | char * | |
877 | getblock(atl, iof) | |
878 | { | |
879 | extern read(), write(); | |
880 | register bno, off; | |
881 | register char *p1, *p2; | |
882 | register int n; | |
883 | ||
884 | bno = (atl>>8)&0377; | |
885 | off = (atl<<1)&0774; | |
886 | if (bno >= 255) { | |
887 | lastc = '\n'; | |
888 | error(T); | |
889 | } | |
890 | nleft = 512 - off; | |
891 | if (bno==iblock) { | |
892 | ichanged |= iof; | |
893 | return(ibuff+off); | |
894 | } | |
895 | if (bno==oblock) | |
896 | return(obuff+off); | |
897 | if (iof==READ) { | |
898 | if (ichanged) { | |
31e58db8 KM |
899 | blkio(iblock, ibuff, write); |
900 | } | |
901 | ichanged = 0; | |
902 | iblock = bno; | |
903 | blkio(bno, ibuff, read); | |
31e58db8 KM |
904 | return(ibuff+off); |
905 | } | |
906 | if (oblock>=0) { | |
31e58db8 KM |
907 | blkio(oblock, obuff, write); |
908 | } | |
909 | oblock = bno; | |
910 | return(obuff+off); | |
911 | } | |
912 | ||
913 | blkio(b, buf, iofcn) | |
914 | char *buf; | |
915 | int (*iofcn)(); | |
916 | { | |
917 | lseek(tfile, (long)b<<9, 0); | |
918 | if ((*iofcn)(tfile, buf, 512) != 512) { | |
919 | error(T); | |
920 | } | |
921 | } | |
922 | ||
923 | init() | |
924 | { | |
925 | register *markp; | |
926 | ||
927 | close(tfile); | |
928 | tline = 2; | |
929 | for (markp = names; markp < &names[26]; ) | |
930 | *markp++ = 0; | |
931 | subnewa = 0; | |
932 | anymarks = 0; | |
933 | iblock = -1; | |
934 | oblock = -1; | |
935 | ichanged = 0; | |
936 | close(creat(tfname, 0600)); | |
937 | tfile = open(tfname, 2); | |
31e58db8 KM |
938 | dot = dol = zero; |
939 | } | |
940 | ||
941 | global(k) | |
942 | { | |
943 | register char *gp; | |
944 | register c; | |
945 | register int *a1; | |
946 | char globuf[GBSIZE]; | |
947 | ||
948 | if (globp) | |
949 | error(Q); | |
950 | setall(); | |
951 | nonzero(); | |
952 | if ((c=getchr())=='\n') | |
953 | error(Q); | |
954 | compile(c); | |
955 | gp = globuf; | |
956 | while ((c = getchr()) != '\n') { | |
957 | if (c==EOF) | |
958 | error(Q); | |
959 | if (c=='\\') { | |
960 | c = getchr(); | |
961 | if (c!='\n') | |
962 | *gp++ = '\\'; | |
963 | } | |
964 | *gp++ = c; | |
965 | if (gp >= &globuf[GBSIZE-2]) | |
966 | error(Q); | |
967 | } | |
968 | *gp++ = '\n'; | |
969 | *gp++ = 0; | |
970 | for (a1=zero; a1<=dol; a1++) { | |
971 | *a1 &= ~01; | |
972 | if (a1>=addr1 && a1<=addr2 && execute(0, a1)==k) | |
973 | *a1 |= 01; | |
974 | } | |
975 | /* | |
976 | * Special case: g/.../d (avoid n^2 algorithm) | |
977 | */ | |
978 | if (globuf[0]=='d' && globuf[1]=='\n' && globuf[2]=='\0') { | |
979 | gdelete(); | |
980 | return; | |
981 | } | |
982 | for (a1=zero; a1<=dol; a1++) { | |
983 | if (*a1 & 01) { | |
984 | *a1 &= ~01; | |
985 | dot = a1; | |
986 | globp = globuf; | |
987 | commands(); | |
988 | a1 = zero; | |
989 | } | |
990 | } | |
991 | } | |
992 | ||
993 | join() | |
994 | { | |
995 | register char *gp, *lp; | |
996 | register *a1; | |
997 | ||
998 | gp = genbuf; | |
999 | for (a1=addr1; a1<=addr2; a1++) { | |
1000 | lp = getline(*a1); | |
1001 | while (*gp = *lp++) | |
1002 | if (gp++ >= &genbuf[LBSIZE-2]) | |
1003 | error(Q); | |
1004 | } | |
1005 | lp = linebuf; | |
1006 | gp = genbuf; | |
1007 | while (*lp++ = *gp++) | |
1008 | ; | |
1009 | *addr1 = putline(); | |
1010 | if (addr1<addr2) | |
1011 | rdelete(addr1+1, addr2); | |
1012 | dot = addr1; | |
1013 | } | |
1014 | ||
1015 | substitute(inglob) | |
1016 | { | |
1017 | register *markp, *a1, nl; | |
1018 | int gsubf; | |
1019 | int getsub(); | |
1020 | ||
1021 | gsubf = compsub(); | |
1022 | for (a1 = addr1; a1 <= addr2; a1++) { | |
1023 | int *ozero; | |
1024 | if (execute(0, a1)==0) | |
1025 | continue; | |
1026 | inglob |= 01; | |
1027 | dosub(); | |
1028 | if (gsubf) { | |
1029 | while (*loc2) { | |
1030 | if (execute(1, (int *)0)==0) | |
1031 | break; | |
1032 | dosub(); | |
1033 | } | |
1034 | } | |
1035 | subnewa = putline(); | |
1036 | *a1 &= ~01; | |
1037 | if (anymarks) { | |
1038 | for (markp = names; markp < &names[26]; markp++) | |
1039 | if (*markp == *a1) | |
1040 | *markp = subnewa; | |
1041 | } | |
1042 | subolda = *a1; | |
1043 | *a1 = subnewa; | |
1044 | ozero = zero; | |
1045 | nl = append(getsub, a1); | |
1046 | nl += zero-ozero; | |
1047 | a1 += nl; | |
1048 | addr2 += nl; | |
1049 | } | |
1050 | if (inglob==0) | |
1051 | error(Q); | |
1052 | } | |
1053 | ||
1054 | compsub() | |
1055 | { | |
1056 | register seof, c; | |
1057 | register char *p; | |
1058 | ||
1059 | if ((seof = getchr()) == '\n' || seof == ' ') | |
1060 | error(Q); | |
1061 | compile(seof); | |
1062 | p = rhsbuf; | |
1063 | for (;;) { | |
1064 | c = getchr(); | |
1065 | if (c=='\\') | |
1066 | c = getchr() | 0200; | |
1067 | if (c=='\n') { | |
1068 | if (globp) | |
1069 | c |= 0200; | |
1070 | else | |
1071 | error(Q); | |
1072 | } | |
1073 | if (c==seof) | |
1074 | break; | |
1075 | *p++ = c; | |
1076 | if (p >= &rhsbuf[LBSIZE/2]) | |
1077 | error(Q); | |
1078 | } | |
1079 | *p++ = 0; | |
1080 | if ((peekc = getchr()) == 'g') { | |
1081 | peekc = 0; | |
1082 | newline(); | |
1083 | return(1); | |
1084 | } | |
1085 | newline(); | |
1086 | return(0); | |
1087 | } | |
1088 | ||
1089 | getsub() | |
1090 | { | |
1091 | register char *p1, *p2; | |
1092 | ||
1093 | p1 = linebuf; | |
1094 | if ((p2 = linebp) == 0) | |
1095 | return(EOF); | |
1096 | while (*p1++ = *p2++) | |
1097 | ; | |
1098 | linebp = 0; | |
1099 | return(0); | |
1100 | } | |
1101 | ||
1102 | dosub() | |
1103 | { | |
1104 | register char *lp, *sp, *rp; | |
1105 | int c; | |
1106 | ||
1107 | lp = linebuf; | |
1108 | sp = genbuf; | |
1109 | rp = rhsbuf; | |
1110 | while (lp < loc1) | |
1111 | *sp++ = *lp++; | |
1112 | while (c = *rp++&0377) { | |
1113 | if (c=='&') { | |
1114 | sp = place(sp, loc1, loc2); | |
1115 | continue; | |
1116 | } else if (c&0200 && (c &= 0177) >='1' && c < nbra+'1') { | |
1117 | sp = place(sp, braslist[c-'1'], braelist[c-'1']); | |
1118 | continue; | |
1119 | } | |
1120 | *sp++ = c&0177; | |
1121 | if (sp >= &genbuf[LBSIZE]) | |
1122 | error(Q); | |
1123 | } | |
1124 | lp = loc2; | |
1125 | loc2 = sp - genbuf + linebuf; | |
1126 | while (*sp++ = *lp++) | |
1127 | if (sp >= &genbuf[LBSIZE]) | |
1128 | error(Q); | |
1129 | lp = linebuf; | |
1130 | sp = genbuf; | |
1131 | while (*lp++ = *sp++) | |
1132 | ; | |
1133 | } | |
1134 | ||
1135 | char * | |
1136 | place(sp, l1, l2) | |
1137 | register char *sp, *l1, *l2; | |
1138 | { | |
1139 | ||
1140 | while (l1 < l2) { | |
1141 | *sp++ = *l1++; | |
1142 | if (sp >= &genbuf[LBSIZE]) | |
1143 | error(Q); | |
1144 | } | |
1145 | return(sp); | |
1146 | } | |
1147 | ||
1148 | move(cflag) | |
1149 | { | |
1150 | register int *adt, *ad1, *ad2; | |
1151 | int getcopy(); | |
1152 | ||
1153 | setdot(); | |
1154 | nonzero(); | |
1155 | if ((adt = address())==0) | |
1156 | error(Q); | |
1157 | newline(); | |
1158 | if (cflag) { | |
1159 | int *ozero, delta; | |
1160 | ad1 = dol; | |
1161 | ozero = zero; | |
1162 | append(getcopy, ad1++); | |
1163 | ad2 = dol; | |
1164 | delta = zero - ozero; | |
1165 | ad1 += delta; | |
1166 | adt += delta; | |
1167 | } else { | |
1168 | ad2 = addr2; | |
1169 | for (ad1 = addr1; ad1 <= ad2;) | |
1170 | *ad1++ &= ~01; | |
1171 | ad1 = addr1; | |
1172 | } | |
1173 | ad2++; | |
1174 | if (adt<ad1) { | |
1175 | dot = adt + (ad2-ad1); | |
1176 | if ((++adt)==ad1) | |
1177 | return; | |
1178 | reverse(adt, ad1); | |
1179 | reverse(ad1, ad2); | |
1180 | reverse(adt, ad2); | |
1181 | } else if (adt >= ad2) { | |
1182 | dot = adt++; | |
1183 | reverse(ad1, ad2); | |
1184 | reverse(ad2, adt); | |
1185 | reverse(ad1, adt); | |
1186 | } else | |
1187 | error(Q); | |
1188 | fchange = 1; | |
1189 | } | |
1190 | ||
1191 | reverse(a1, a2) | |
1192 | register int *a1, *a2; | |
1193 | { | |
1194 | register int t; | |
1195 | ||
1196 | for (;;) { | |
1197 | t = *--a2; | |
1198 | if (a2 <= a1) | |
1199 | return; | |
1200 | *a2 = *a1; | |
1201 | *a1++ = t; | |
1202 | } | |
1203 | } | |
1204 | ||
1205 | getcopy() | |
1206 | { | |
1207 | if (addr1 > addr2) | |
1208 | return(EOF); | |
1209 | getline(*addr1++); | |
1210 | return(0); | |
1211 | } | |
1212 | ||
1213 | compile(aeof) | |
1214 | { | |
1215 | register eof, c; | |
1216 | register char *ep; | |
1217 | char *lastep; | |
1218 | char bracket[NBRA], *bracketp; | |
1219 | int cclcnt; | |
1220 | ||
1221 | ep = expbuf; | |
1222 | eof = aeof; | |
1223 | bracketp = bracket; | |
1224 | if ((c = getchr()) == eof) { | |
1225 | if (*ep==0) | |
1226 | error(Q); | |
1227 | return; | |
1228 | } | |
1229 | circfl = 0; | |
1230 | nbra = 0; | |
1231 | if (c=='^') { | |
1232 | c = getchr(); | |
1233 | circfl++; | |
1234 | } | |
1235 | peekc = c; | |
1236 | lastep = 0; | |
1237 | for (;;) { | |
1238 | if (ep >= &expbuf[ESIZE]) | |
1239 | goto cerror; | |
1240 | c = getchr(); | |
1241 | if (c==eof) { | |
1242 | if (bracketp != bracket) | |
1243 | goto cerror; | |
1244 | *ep++ = CEOF; | |
1245 | return; | |
1246 | } | |
1247 | if (c!='*') | |
1248 | lastep = ep; | |
1249 | switch (c) { | |
1250 | ||
1251 | case '\\': | |
1252 | if ((c = getchr())=='(') { | |
1253 | if (nbra >= NBRA) | |
1254 | goto cerror; | |
1255 | *bracketp++ = nbra; | |
1256 | *ep++ = CBRA; | |
1257 | *ep++ = nbra++; | |
1258 | continue; | |
1259 | } | |
1260 | if (c == ')') { | |
1261 | if (bracketp <= bracket) | |
1262 | goto cerror; | |
1263 | *ep++ = CKET; | |
1264 | *ep++ = *--bracketp; | |
1265 | continue; | |
1266 | } | |
1267 | if (c>='1' && c<'1'+NBRA) { | |
1268 | *ep++ = CBACK; | |
1269 | *ep++ = c-'1'; | |
1270 | continue; | |
1271 | } | |
1272 | *ep++ = CCHR; | |
1273 | if (c=='\n') | |
1274 | goto cerror; | |
1275 | *ep++ = c; | |
1276 | continue; | |
1277 | ||
1278 | case '.': | |
1279 | *ep++ = CDOT; | |
1280 | continue; | |
1281 | ||
1282 | case '\n': | |
1283 | goto cerror; | |
1284 | ||
1285 | case '*': | |
1286 | if (lastep==0 || *lastep==CBRA || *lastep==CKET) | |
1287 | goto defchar; | |
1288 | *lastep |= STAR; | |
1289 | continue; | |
1290 | ||
1291 | case '$': | |
1292 | if ((peekc=getchr()) != eof) | |
1293 | goto defchar; | |
1294 | *ep++ = CDOL; | |
1295 | continue; | |
1296 | ||
1297 | case '[': | |
1298 | *ep++ = CCL; | |
1299 | *ep++ = 0; | |
1300 | cclcnt = 1; | |
1301 | if ((c=getchr()) == '^') { | |
1302 | c = getchr(); | |
1303 | ep[-2] = NCCL; | |
1304 | } | |
1305 | do { | |
1306 | if (c=='\n') | |
1307 | goto cerror; | |
1308 | if (c=='-' && ep[-1]!=0) { | |
1309 | if ((c=getchr())==']') { | |
1310 | *ep++ = '-'; | |
1311 | cclcnt++; | |
1312 | break; | |
1313 | } | |
1314 | while (ep[-1]<c) { | |
1315 | *ep = ep[-1]+1; | |
1316 | ep++; | |
1317 | cclcnt++; | |
1318 | if (ep>=&expbuf[ESIZE]) | |
1319 | goto cerror; | |
1320 | } | |
1321 | } | |
1322 | *ep++ = c; | |
1323 | cclcnt++; | |
1324 | if (ep >= &expbuf[ESIZE]) | |
1325 | goto cerror; | |
1326 | } while ((c = getchr()) != ']'); | |
1327 | lastep[1] = cclcnt; | |
1328 | continue; | |
1329 | ||
1330 | defchar: | |
1331 | default: | |
1332 | *ep++ = CCHR; | |
1333 | *ep++ = c; | |
1334 | } | |
1335 | } | |
1336 | cerror: | |
1337 | expbuf[0] = 0; | |
1338 | nbra = 0; | |
1339 | error(Q); | |
1340 | } | |
1341 | ||
1342 | execute(gf, addr) | |
1343 | int *addr; | |
1344 | { | |
1345 | register char *p1, *p2, c; | |
1346 | ||
1347 | for (c=0; c<NBRA; c++) { | |
1348 | braslist[c] = 0; | |
1349 | braelist[c] = 0; | |
1350 | } | |
1351 | if (gf) { | |
1352 | if (circfl) | |
1353 | return(0); | |
1354 | p1 = linebuf; | |
1355 | p2 = genbuf; | |
1356 | while (*p1++ = *p2++) | |
1357 | ; | |
1358 | locs = p1 = loc2; | |
1359 | } else { | |
1360 | if (addr==zero) | |
1361 | return(0); | |
1362 | p1 = getline(*addr); | |
1363 | locs = 0; | |
1364 | } | |
1365 | p2 = expbuf; | |
1366 | if (circfl) { | |
1367 | loc1 = p1; | |
1368 | return(advance(p1, p2)); | |
1369 | } | |
1370 | /* fast check for first character */ | |
1371 | if (*p2==CCHR) { | |
1372 | c = p2[1]; | |
1373 | do { | |
1374 | if (*p1!=c) | |
1375 | continue; | |
1376 | if (advance(p1, p2)) { | |
1377 | loc1 = p1; | |
1378 | return(1); | |
1379 | } | |
1380 | } while (*p1++); | |
1381 | return(0); | |
1382 | } | |
1383 | /* regular algorithm */ | |
1384 | do { | |
1385 | if (advance(p1, p2)) { | |
1386 | loc1 = p1; | |
1387 | return(1); | |
1388 | } | |
1389 | } while (*p1++); | |
1390 | return(0); | |
1391 | } | |
1392 | ||
1393 | advance(lp, ep) | |
1394 | register char *ep, *lp; | |
1395 | { | |
1396 | register char *curlp; | |
1397 | int i; | |
1398 | ||
1399 | for (;;) switch (*ep++) { | |
1400 | ||
1401 | case CCHR: | |
1402 | if (*ep++ == *lp++) | |
1403 | continue; | |
1404 | return(0); | |
1405 | ||
1406 | case CDOT: | |
1407 | if (*lp++) | |
1408 | continue; | |
1409 | return(0); | |
1410 | ||
1411 | case CDOL: | |
1412 | if (*lp==0) | |
1413 | continue; | |
1414 | return(0); | |
1415 | ||
1416 | case CEOF: | |
1417 | loc2 = lp; | |
1418 | return(1); | |
1419 | ||
1420 | case CCL: | |
1421 | if (cclass(ep, *lp++, 1)) { | |
1422 | ep += *ep; | |
1423 | continue; | |
1424 | } | |
1425 | return(0); | |
1426 | ||
1427 | case NCCL: | |
1428 | if (cclass(ep, *lp++, 0)) { | |
1429 | ep += *ep; | |
1430 | continue; | |
1431 | } | |
1432 | return(0); | |
1433 | ||
1434 | case CBRA: | |
1435 | braslist[*ep++] = lp; | |
1436 | continue; | |
1437 | ||
1438 | case CKET: | |
1439 | braelist[*ep++] = lp; | |
1440 | continue; | |
1441 | ||
1442 | case CBACK: | |
1443 | if (braelist[i = *ep++]==0) | |
1444 | error(Q); | |
1445 | if (backref(i, lp)) { | |
1446 | lp += braelist[i] - braslist[i]; | |
1447 | continue; | |
1448 | } | |
1449 | return(0); | |
1450 | ||
1451 | case CBACK|STAR: | |
1452 | if (braelist[i = *ep++] == 0) | |
1453 | error(Q); | |
1454 | curlp = lp; | |
1455 | while (backref(i, lp)) | |
1456 | lp += braelist[i] - braslist[i]; | |
1457 | while (lp >= curlp) { | |
1458 | if (advance(lp, ep)) | |
1459 | return(1); | |
1460 | lp -= braelist[i] - braslist[i]; | |
1461 | } | |
1462 | continue; | |
1463 | ||
1464 | case CDOT|STAR: | |
1465 | curlp = lp; | |
1466 | while (*lp++) | |
1467 | ; | |
1468 | goto star; | |
1469 | ||
1470 | case CCHR|STAR: | |
1471 | curlp = lp; | |
1472 | while (*lp++ == *ep) | |
1473 | ; | |
1474 | ep++; | |
1475 | goto star; | |
1476 | ||
1477 | case CCL|STAR: | |
1478 | case NCCL|STAR: | |
1479 | curlp = lp; | |
1480 | while (cclass(ep, *lp++, ep[-1]==(CCL|STAR))) | |
1481 | ; | |
1482 | ep += *ep; | |
1483 | goto star; | |
1484 | ||
1485 | star: | |
1486 | do { | |
1487 | lp--; | |
1488 | if (lp==locs) | |
1489 | break; | |
1490 | if (advance(lp, ep)) | |
1491 | return(1); | |
1492 | } while (lp > curlp); | |
1493 | return(0); | |
1494 | ||
1495 | default: | |
1496 | error(Q); | |
1497 | } | |
1498 | } | |
1499 | ||
1500 | backref(i, lp) | |
1501 | register i; | |
1502 | register char *lp; | |
1503 | { | |
1504 | register char *bp; | |
1505 | ||
1506 | bp = braslist[i]; | |
1507 | while (*bp++ == *lp++) | |
1508 | if (bp >= braelist[i]) | |
1509 | return(1); | |
1510 | return(0); | |
1511 | } | |
1512 | ||
1513 | cclass(set, c, af) | |
1514 | register char *set, c; | |
1515 | { | |
1516 | register n; | |
1517 | ||
1518 | if (c==0) | |
1519 | return(0); | |
1520 | n = *set++; | |
1521 | while (--n) | |
1522 | if (*set++ == c) | |
1523 | return(af); | |
1524 | return(!af); | |
1525 | } | |
1526 | ||
1527 | putd() | |
1528 | { | |
1529 | register r; | |
1530 | ||
1531 | r = count%10; | |
1532 | count /= 10; | |
1533 | if (count) | |
1534 | putd(); | |
1535 | putchr(r + '0'); | |
1536 | } | |
1537 | ||
1538 | puts(sp) | |
1539 | register char *sp; | |
1540 | { | |
1541 | col = 0; | |
1542 | while (*sp) | |
1543 | putchr(*sp++); | |
1544 | putchr('\n'); | |
1545 | } | |
1546 | ||
1547 | char line[70]; | |
1548 | char *linp = line; | |
1549 | ||
1550 | putchr(ac) | |
1551 | { | |
1552 | register char *lp; | |
1553 | register c; | |
1554 | ||
1555 | lp = linp; | |
1556 | c = ac; | |
1557 | if (listf) { | |
1558 | col++; | |
1559 | if (col >= 72) { | |
1560 | col = 0; | |
1561 | *lp++ = '\\'; | |
1562 | *lp++ = '\n'; | |
1563 | } | |
1564 | if (c=='\t') { | |
1565 | c = '>'; | |
1566 | goto esc; | |
1567 | } | |
1568 | if (c=='\b') { | |
1569 | c = '<'; | |
1570 | esc: | |
1571 | *lp++ = '-'; | |
1572 | *lp++ = '\b'; | |
1573 | *lp++ = c; | |
1574 | goto out; | |
1575 | } | |
1576 | if (c<' ' && c!= '\n') { | |
1577 | *lp++ = '\\'; | |
1578 | *lp++ = (c>>3)+'0'; | |
1579 | *lp++ = (c&07)+'0'; | |
1580 | col += 2; | |
1581 | goto out; | |
1582 | } | |
1583 | } | |
1584 | *lp++ = c; | |
1585 | out: | |
1586 | if(c == '\n' || lp >= &line[64]) { | |
1587 | linp = line; | |
1588 | write(1, line, lp-line); | |
1589 | return; | |
1590 | } | |
1591 | linp = lp; | |
1592 | } | |
62793f1c | 1593 |