1 /* Generate RCS revisions. */
3 /* Copyright 1982, 1988, 1989 Walter Tichy
4 Copyright 1990, 1991, 1992, 1993, 1994, 1995 Paul Eggert
5 Distributed under license by the Free Software Foundation, Inc.
7 This file is part of RCS.
9 RCS is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2, or (at your option)
14 RCS is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with RCS; see the file COPYING.
21 If not, write to the Free Software Foundation,
22 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
24 Report problems and direct all questions to:
26 rcs-bugs@cs.purdue.edu
31 * $FreeBSD: src/gnu/usr.bin/rcs/lib/rcsgen.c,v 1.7 1999/08/27 23:36:46 peter Exp $
32 * $DragonFly: src/gnu/usr.bin/rcs/lib/rcsgen.c,v 1.2 2003/06/17 04:25:47 dillon Exp $
34 * Revision 5.16 1995/06/16 06:19:24 eggert
37 * Revision 5.15 1995/06/01 16:23:43 eggert
38 * (putadmin): Open RCS file with FOPEN_WB.
40 * Revision 5.14 1994/03/17 14:05:48 eggert
41 * Work around SVR4 stdio performance bug.
42 * Flush stderr after prompt. Remove lint.
44 * Revision 5.13 1993/11/03 17:42:27 eggert
45 * Don't discard ignored phrases. Improve quality of diagnostics.
47 * Revision 5.12 1992/07/28 16:12:44 eggert
48 * Statement macro names now end in _.
49 * Be consistent about pathnames vs filenames.
51 * Revision 5.11 1992/01/24 18:44:19 eggert
52 * Move put routines here from rcssyn.c.
53 * Add support for bad_creat0.
55 * Revision 5.10 1991/10/07 17:32:46 eggert
56 * Fix log bugs, e.g. ci -t/dev/null when has_mmap.
58 * Revision 5.9 1991/09/10 22:15:46 eggert
59 * Fix test for redirected stdin.
61 * Revision 5.8 1991/08/19 03:13:55 eggert
62 * Add piece tables. Tune.
64 * Revision 5.7 1991/04/21 11:58:24 eggert
67 * Revision 5.6 1990/12/27 19:54:26 eggert
68 * Fix bug: rcs -t inserted \n, making RCS file grow.
70 * Revision 5.5 1990/12/04 05:18:45 eggert
71 * Use -I for prompts and -q for diagnostics.
73 * Revision 5.4 1990/11/01 05:03:47 eggert
74 * Add -I and new -t behavior. Permit arbitrary data in logs.
76 * Revision 5.3 1990/09/21 06:12:43 hammer
77 * made putdesc() treat stdin the same whether or not it was from a terminal
78 * by making it recognize that a single '.' was then end of the
81 * Revision 5.2 1990/09/04 08:02:25 eggert
82 * Fix `co -p1.1 -ko' bug. Standardize yes-or-no procedure.
84 * Revision 5.1 1990/08/29 07:14:01 eggert
85 * Clean old log messages too.
87 * Revision 5.0 1990/08/22 08:12:52 eggert
88 * Remove compile-time limits; use malloc instead.
89 * Ansify and Posixate.
91 * Revision 4.7 89/05/01 15:12:49 narten
92 * changed copyright header to reflect current distribution rules
94 * Revision 4.6 88/08/28 14:59:10 eggert
95 * Shrink stdio code size; allow cc -R; remove lint; isatty() -> ttystdin()
97 * Revision 4.5 87/12/18 11:43:25 narten
98 * additional lint cleanups, and a bug fix from the 4.3BSD version that
99 * keeps "ci" from sticking a '\377' into the description if you run it
100 * with a zero-length file as the description. (Guy Harris)
102 * Revision 4.4 87/10/18 10:35:10 narten
103 * Updating version numbers. Changes relative to 1.1 actually relative to
106 * Revision 1.3 87/09/24 13:59:51 narten
107 * Sources now pass through lint (if you ignore printf/sprintf/fprintf
110 * Revision 1.2 87/03/27 14:22:27 jenkins
113 * Revision 4.2 83/12/02 23:01:39 wft
114 * merged 4.1 and 3.3.1.1 (clearerr(stdin)).
116 * Revision 4.1 83/05/10 16:03:33 wft
117 * Changed putamin() to abort if trying to reread redirected stdin.
118 * Fixed getdesc() to output a prompt on initial newline.
120 * Revision 3.3.1.1 83/10/19 04:21:51 lepreau
121 * Added clearerr(stdin) for re-reading description from stdin.
123 * Revision 3.3 82/11/28 21:36:49 wft
126 * Revision 3.3 82/11/28 21:36:49 wft
127 * Replaced ferror() followed by fclose() with ffclose().
128 * Putdesc() now suppresses the prompts if stdin
129 * is not a terminal. A pointer to the current log message is now
130 * inserted into the corresponding delta, rather than leaving it in a
133 * Revision 3.2 82/10/18 21:11:26 wft
134 * I added checks for write errors during editing, and improved
135 * the prompt on putdesc().
137 * Revision 3.1 82/10/13 15:55:09 wft
138 * corrected type of variables assigned to by getc (char --> int)
146 libId(genId, "$DragonFly: src/gnu/usr.bin/rcs/lib/rcsgen.c,v 1.2 2003/06/17 04:25:47 dillon Exp $")
148 int interactiveflag; /* Should we act as if stdin is a tty? */
149 struct buf curlogbuf; /* buffer for current log message */
151 enum stringwork { enter, copy, edit, expand, edit_expand };
153 static void putdelta P((struct hshentry const*,FILE*));
154 static void scandeltatext P((struct hshentry*,enum stringwork,int));
160 buildrevision(deltas, target, outfile, expandflag)
161 struct hshentries const *deltas;
162 struct hshentry *target;
165 /* Function: Generates the revision given by target
166 * by retrieving all deltas given by parameter deltas and combining them.
167 * If outfile is set, the revision is output to it,
168 * otherwise written into a temporary file.
169 * Temporary files are allocated by maketemp().
170 * if expandflag is set, keyword expansion is performed.
171 * Return 0 if outfile is set, the name of the temporary file otherwise.
173 * Algorithm: Copy initial revision unchanged. Then edit all revisions but
174 * the last one into it, alternating input and output files (resultname and
175 * editname). The last revision is then edited in, performing simultaneous
176 * keyword substitution (this saves one extra pass).
177 * All this simplifies if only one revision needs to be generated,
178 * or no keyword expansion is necessary, or if output goes to stdout.
181 if (deltas->first == target) {
182 /* only latest revision to generate */
184 scandeltatext(target, expandflag?expand:copy, true);
192 /* several revisions to generate */
193 /* Get initial revision without keyword expansion. */
194 scandeltatext(deltas->first, enter, false);
195 while ((deltas=deltas->rest)->rest) {
196 /* do all deltas except last one */
197 scandeltatext(deltas->first, edit, false);
199 if (expandflag || outfile) {
200 /* first, get to beginning of file*/
201 finishedit((struct hshentry*)0, outfile, false);
203 scandeltatext(target, expandflag?edit_expand:edit, true);
205 expandflag ? target : (struct hshentry*)0,
218 scandeltatext(delta, func, needlog)
219 struct hshentry *delta;
220 enum stringwork func;
222 /* Function: Scans delta text nodes up to and including the one given
223 * by delta. For the one given by delta, the log message is saved into
224 * delta->log if needlog is set; func specifies how to handle the text.
225 * Similarly, if needlog, delta->igtext is set to the ignored phrases.
226 * Assumes the initial lexeme must be read in first.
227 * Does not advance nexttok after it is finished.
230 struct hshentry const *nextdelta;
235 fatserror("can't find delta for revision %s", delta->num);
237 if (!(nextdelta=getnum())) {
238 fatserror("delta number corrupted");
241 if (needlog && delta==nextdelta) {
242 cb = savestring(&curlogbuf);
243 delta->log = cleanlogmsg(curlogbuf.string, cb.size);
245 delta->igtext = getphrases(Ktext);
246 } else {readstring();
247 ignorephrases(Ktext);
251 if (delta==nextdelta)
253 readstring(); /* skip over it */
257 case enter: enterstring(); break;
258 case copy: copystring(); break;
259 case expand: xpandstring(delta); break;
260 case edit: editstring((struct hshentry *)0); break;
261 case edit_expand: editstring(delta); break;
270 register char *t = m;
271 register char const *f = t;
275 if ((*t++ = *f++) == '\n')
277 if (t[-1]!=' ' && t[-1]!='\t') {
282 while (m < t && (t[-1]==' ' || t[-1]=='\t' || t[-1]=='\n'))
292 static int initialized;
294 if (!interactiveflag)
295 interactiveflag = isatty(STDIN_FILENO);
298 return interactiveflag;
308 if (feof(in) && ttystdin())
313 if (feof(in) && ttystdin())
321 yesorno(int default_answer, char const *question, ...)
324 yesorno(default_answer, question, va_alist)
325 int default_answer; char const *question; va_dcl
330 if (!quietflag && ttystdin()) {
332 vararg_start(args, question);
333 fvfprintf(stderr, question, args);
337 while (c!='\n' && !feof(stdin))
339 if (r=='y' || r=='Y')
341 if (r=='n' || r=='N')
344 return default_answer;
349 putdesc(textflag, textfile)
352 /* Function: puts the descriptive text into file frewrite.
353 * if finptr && !textflag, the text is copied from the old description.
354 * Otherwise, if textfile, the text is read from that
355 * file, or from stdin, if !textfile.
356 * A textfile with a leading '-' is treated as a string, not a pathname.
357 * If finptr, the old descriptive text is discarded.
358 * Always clears foutptr.
361 static struct buf desc;
362 static struct cbuf desclean;
366 register FILE * frew;
372 if (finptr && !textflag) {
373 /* copy old description */
374 aprintf(frew, "\n\n%s%c", Kdesc, nextc);
380 /* get new description */
382 /*skip old description*/
385 aprintf(frew,"\n\n%s\n%c",Kdesc,SDELIM);
387 desclean = getsstdin(
389 "NOTE: This is NOT the log message!\n", &desc
391 else if (!desclean.string) {
392 if (*textfile == '-') {
396 if (!(txt = fopenSafer(textfile, "r")))
400 plim = p + desc.size;
402 if ((c=getc(txt)) == EOF) {
408 p = bufenlarge(&desc, &plim);
411 if (fclose(txt) != 0)
416 desclean = cleanlogmsg(p, s);
418 putstring(frew, false, desclean, true);
424 getsstdin(option, name, note, buf)
425 char const *option, *name, *note;
431 register int tty = ttystdin();
435 "enter %s, terminated with single '.' or end of file:\n%s>> ",
439 } else if (feof(stdin))
440 rcsfaterror("can't reread redirected stdin for %s; use -%s<%s>",
446 c = getcstdin(), !feof(stdin);
447 bufrealloc(buf, i+1), p = buf->string, p[i++] = c
450 if (i && p[i-1]=='.' && (i==1 || p[i-2]=='\n')) {
451 /* Remove trailing '.'. */
455 aputs(">> ", stderr);
458 return cleanlogmsg(p, i);
464 /* Output the admin node. */
467 struct assoc const *curassoc;
468 struct rcslock const *curlock;
469 struct access const *curaccess;
471 if (!(fout = frewrite)) {
474 fout = fopenSafer(makedirtemp(0), FOPEN_WB);
478 fout = fdopen(fo, FOPEN_WB);
481 if (!(frewrite = fout))
486 * Output the first character with putc, not printf.
487 * Otherwise, an SVR4 stdio bug buffers output inefficiently.
490 aprintf(fout, "%s\t%s;\n", Khead + 1, Head?Head->num:"");
491 if (Dbranch && VERSION(4)<=RCSversion)
492 aprintf(fout, "%s\t%s;\n", Kbranch, Dbranch);
494 aputs(Kaccess, fout);
495 curaccess = AccessList;
497 aprintf(fout, "\n\t%s", curaccess->login);
498 curaccess = curaccess->nextaccess;
500 aprintf(fout, ";\n%s", Ksymbols);
503 aprintf(fout, "\n\t%s:%s", curassoc->symbol, curassoc->num);
504 curassoc = curassoc->nextassoc;
506 aprintf(fout, ";\n%s", Klocks);
509 aprintf(fout, "\n\t%s:%s", curlock->login, curlock->delta->num);
510 curlock = curlock->nextlock;
512 if (StrictLocks) aprintf(fout, "; %s", Kstrict);
513 aprintf(fout, ";\n");
515 aprintf(fout, "%s\t", Kcomment);
516 putstring(fout, true, Comment, false);
517 aprintf(fout, ";\n");
519 if (Expand != KEYVAL_EXPAND)
520 aprintf(fout, "%s\t%c%s%c;\n",
521 Kexpand, SDELIM, expand_names[Expand], SDELIM
523 awrite(Ignored.string, Ignored.size, fout);
530 register struct hshentry const *node;
531 register FILE * fout;
532 /* Output the delta NODE to FOUT. */
534 struct branchhead const *nextbranch;
538 aprintf(fout, "\n%s\n%s\t%s;\t%s %s;\t%s %s;\nbranches",
541 Kauthor, node->author,
542 Kstate, node->state?node->state:""
544 nextbranch = node->branches;
546 aprintf(fout, "\n\t%s", nextbranch->hsh->num);
547 nextbranch = nextbranch->nextbranch;
550 aprintf(fout, ";\n%s\t%s;\n", Knext, node->next?node->next->num:"");
551 awrite(node->ig.string, node->ig.size, fout);
557 struct hshentry const *root;
559 /* Output the delta tree with base ROOT in preorder to FOUT. */
561 struct branchhead const *nextbranch;
566 putdelta(root, fout);
568 puttree(root->next, fout);
570 nextbranch = root->branches;
572 puttree(nextbranch->hsh, fout);
573 nextbranch = nextbranch->nextbranch;
579 putdtext(delta, srcname, fout, diffmt)
580 struct hshentry const *delta;
585 * Output a deltatext node with delta number DELTA->num, log message DELTA->log,
586 * ignored phrases DELTA->igtext and text SRCNAME to FOUT.
587 * Double up all SDELIMs in both the log and the text.
588 * Make sure the log message ends in \n.
589 * Return false on error.
590 * If DIFFMT, also check that the text is valid diff -n output.
594 if (!(fin = Iopen(srcname, "r", (struct stat*)0))) {
598 putdftext(delta, fin, fout, diffmt);
604 putstring(out, delim, s, log)
609 * Output to OUT one SDELIM if DELIM, then the string S with SDELIMs doubled.
610 * If LOG is set then S is a log string; append a newline if S is nonempty.
613 register char const *sp;
619 for (ss = s.size; ss; --ss) {
630 putdftext(delta, finfile, foutfile, diffmt)
631 struct hshentry const *delta;
635 /* like putdtext(), except the source file is already open */
645 aprintf(fout, DELNUMFORM, delta->num, Klog);
648 putstring(fout, true, delta->log, true);
651 /* put ignored phrases */
652 awrite(delta->igtext.string, delta->igtext.size, fout);
655 aprintf(fout, "%s\n%c", Ktext, SDELIM);
663 cachegeteof_(c, break;)
664 if (c==SDELIM) aputc_(SDELIM, fout) /*double up SDELIM*/
669 while (0 <= (ed = getdiffcmd(fin, false, fout, &dc)))
674 cachegeteof_(c, { if (!dc.nlines) goto OK_EOF; unexpected_EOF(); })
683 aprintf(fout, "%c\n", SDELIM);