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1.1 jfb 1: /* $OpenBSD$ */
2: /*
3: * Copyright (c) 2004 Jean-Francois Brousseau <jfb@openbsd.org>
4: * All rights reserved.
5: *
6: * Redistribution and use in source and binary forms, with or without
7: * modification, are permitted provided that the following conditions
8: * are met:
9: *
10: * 1. Redistributions of source code must retain the above copyright
11: * notice, this list of conditions and the following disclaimer.
12: * 2. The name of the author may not be used to endorse or promote products
13: * derived from this software without specific prior written permission.
14: *
15: * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
16: * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
17: * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
18: * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
19: * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
20: * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
21: * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
22: * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
23: * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
24: * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25: */
26:
27: #include <sys/param.h>
28: #include <sys/queue.h>
29: #include <sys/stat.h>
30:
31: #include <errno.h>
32: #include <stdio.h>
33: #include <ctype.h>
34: #include <stdlib.h>
35: #include <string.h>
36:
37: #include "rcs.h"
38: #include "log.h"
39:
40: #define RCS_BUFSIZE 8192
41:
42:
43: /* RCS token types */
44: #define RCS_TOK_ERR -1
45: #define RCS_TOK_EOF 0
46: #define RCS_TOK_NUM 1
47: #define RCS_TOK_ID 2
48: #define RCS_TOK_STRING 3
49: #define RCS_TOK_SCOLON 4
50: #define RCS_TOK_COLON 5
51:
52:
53: #define RCS_TOK_HEAD 8
54: #define RCS_TOK_BRANCH 9
55: #define RCS_TOK_ACCESS 10
56: #define RCS_TOK_SYMBOLS 11
57: #define RCS_TOK_LOCKS 12
58: #define RCS_TOK_COMMENT 13
59: #define RCS_TOK_EXPAND 14
60: #define RCS_TOK_DATE 15
61: #define RCS_TOK_AUTHOR 16
62: #define RCS_TOK_STATE 17
63: #define RCS_TOK_NEXT 18
64: #define RCS_TOK_BRANCHES 19
65: #define RCS_TOK_DESC 20
66: #define RCS_TOK_LOG 21
67: #define RCS_TOK_TEXT 22
68: #define RCS_TOK_STRICT 23
69:
70: #define RCS_ISKEY(t) (((t) >= RCS_TOK_HEAD) && ((t) <= RCS_TOK_BRANCHES))
71:
72:
73: #define RCS_NOSCOL 0x01 /* no terminating semi-colon */
74: #define RCS_VOPT 0x02 /* value is optional */
75:
76:
77:
78: /* opaque parse data */
79: struct rcs_pdata {
80: u_int rp_line;
81:
82: char *rp_buf;
83: size_t rp_blen;
84:
85: /* pushback token buffer */
86: char rp_ptok[128];
87: int rp_pttype; /* token type, RCS_TOK_ERR if no token */
88:
89: FILE *rp_file;
90: };
91:
92:
93: struct rcs_line {
94: char *rl_line;
95: int rl_lineno;
96: TAILQ_ENTRY(rcs_line) rl_list;
97: };
1.5 vincent 98: TAILQ_HEAD(rcs_tqh, rcs_line);
1.1 jfb 99:
100: struct rcs_foo {
101: int rl_nblines;
102: char *rl_data;
1.5 vincent 103: struct rcs_tqh rl_lines;
1.1 jfb 104: };
105:
106: static int rcs_parse_admin (RCSFILE *);
107: static int rcs_parse_delta (RCSFILE *);
108: static int rcs_parse_deltatext (RCSFILE *);
109:
1.7 jfb 110: static int rcs_parse_access (RCSFILE *);
111: static int rcs_parse_symbols (RCSFILE *);
112: static int rcs_parse_locks (RCSFILE *);
113: static int rcs_parse_branches (RCSFILE *, struct rcs_delta *);
114: static void rcs_freedelta (struct rcs_delta *);
115: static void rcs_freepdata (struct rcs_pdata *);
116: static int rcs_gettok (RCSFILE *);
117: static int rcs_pushtok (RCSFILE *, const char *, int);
118: static int rcs_patch_lines (struct rcs_foo *, struct rcs_foo *);
119:
120: static struct rcs_delta* rcs_findrev (RCSFILE *, RCSNUM *);
121: static struct rcs_foo* rcs_splitlines (const char *);
122: static void rcs_freefoo (struct rcs_foo *);
1.1 jfb 123:
124: #define RCS_TOKSTR(rfp) ((struct rcs_pdata *)rfp->rf_pdata)->rp_buf
125: #define RCS_TOKLEN(rfp) ((struct rcs_pdata *)rfp->rf_pdata)->rp_blen
126:
127:
128: static struct rcs_key {
129: char rk_str[16];
130: int rk_id;
131: int rk_val;
132: int rk_flags;
133: } rcs_keys[] = {
134: { "access", RCS_TOK_ACCESS, RCS_TOK_ID, RCS_VOPT },
135: { "author", RCS_TOK_AUTHOR, RCS_TOK_STRING, 0 },
136: { "branch", RCS_TOK_BRANCH, RCS_TOK_NUM, RCS_VOPT },
137: { "branches", RCS_TOK_BRANCHES, RCS_TOK_NUM, RCS_VOPT },
138: { "comment", RCS_TOK_COMMENT, RCS_TOK_STRING, RCS_VOPT },
139: { "date", RCS_TOK_DATE, RCS_TOK_NUM, 0 },
140: { "desc", RCS_TOK_DESC, RCS_TOK_STRING, RCS_NOSCOL },
141: { "expand", RCS_TOK_EXPAND, RCS_TOK_STRING, RCS_VOPT },
142: { "head", RCS_TOK_HEAD, RCS_TOK_NUM, RCS_VOPT },
143: { "locks", RCS_TOK_LOCKS, RCS_TOK_ID, 0 },
144: { "log", RCS_TOK_LOG, RCS_TOK_STRING, RCS_NOSCOL },
145: { "next", RCS_TOK_NEXT, RCS_TOK_NUM, RCS_VOPT },
146: { "state", RCS_TOK_STATE, RCS_TOK_STRING, RCS_VOPT },
147: { "strict", RCS_TOK_STRICT, 0, 0, },
148: { "symbols", RCS_TOK_SYMBOLS, 0, 0 },
149: { "text", RCS_TOK_TEXT, RCS_TOK_STRING, RCS_NOSCOL },
150: };
151:
152:
153:
154: /*
155: * rcs_open()
156: *
157: * Open a file containing RCS-formatted information. The file's path is
158: * given in <path>, and the opening mode is given in <mode>, which is either
159: * RCS_MODE_READ, RCS_MODE_WRITE, or RCS_MODE_RDWR. If the mode requests write
160: * access and the file does not exist, it will be created.
161: * The file isn't actually parsed by rcs_open(); parsing is delayed until the
162: * first operation that requires information from the file.
163: * Returns a handle to the opened file on success, or NULL on failure.
164: */
165:
166: RCSFILE*
167: rcs_open(const char *path, u_int mode)
168: {
169: RCSFILE *rfp;
170: struct stat st;
171:
172: if ((stat(path, &st) == -1) && (errno == ENOENT) &&
173: !(mode & RCS_MODE_WRITE)) {
174: cvs_log(LP_ERRNO, "cannot open RCS file `%s'", path);
175: return (NULL);
176: }
177:
178: rfp = (RCSFILE *)malloc(sizeof(*rfp));
179: if (rfp == NULL) {
180: cvs_log(LP_ERRNO, "failed to allocate RCS file structure");
181: return (NULL);
182: }
183: memset(rfp, 0, sizeof(*rfp));
184:
185: rfp->rf_head = rcsnum_alloc();
186: if (rfp->rf_head == NULL) {
187: free(rfp);
188: return (NULL);
189: }
190:
1.11 joris 191: rfp->rf_branch = rcsnum_alloc();
192: if (rfp->rf_branch == NULL) {
193: rcs_close(rfp);
194: return (NULL);
195: }
196:
1.1 jfb 197: rfp->rf_path = strdup(path);
198: if (rfp->rf_path == NULL) {
199: cvs_log(LP_ERRNO, "failed to duplicate RCS file path");
200: rcs_close(rfp);
201: return (NULL);
202: }
203:
204: rcsnum_aton(RCS_HEAD_INIT, NULL, rfp->rf_head);
205:
206: rfp->rf_ref = 1;
207: rfp->rf_flags |= RCS_RF_SLOCK;
208: rfp->rf_mode = mode;
209:
210: TAILQ_INIT(&(rfp->rf_delta));
211: TAILQ_INIT(&(rfp->rf_symbols));
212: TAILQ_INIT(&(rfp->rf_locks));
213:
214: if (rcs_parse(rfp) < 0) {
215: rcs_close(rfp);
216: return (NULL);
217: }
218:
219: return (rfp);
220: }
221:
222:
223: /*
224: * rcs_close()
225: *
226: * Close an RCS file handle.
227: */
228:
229: void
230: rcs_close(RCSFILE *rfp)
231: {
232: struct rcs_delta *rdp;
233:
234: if (rfp->rf_ref > 1) {
235: rfp->rf_ref--;
236: return;
237: }
238:
239: while (!TAILQ_EMPTY(&(rfp->rf_delta))) {
240: rdp = TAILQ_FIRST(&(rfp->rf_delta));
241: TAILQ_REMOVE(&(rfp->rf_delta), rdp, rd_list);
242: rcs_freedelta(rdp);
243: }
244:
245: if (rfp->rf_head != NULL)
246: rcsnum_free(rfp->rf_head);
1.11 joris 247: if (rfp->rf_branch != NULL)
248: rcsnum_free(rfp->rf_branch);
1.1 jfb 249:
250: if (rfp->rf_path != NULL)
251: free(rfp->rf_path);
252: if (rfp->rf_comment != NULL)
253: free(rfp->rf_comment);
254: if (rfp->rf_expand != NULL)
255: free(rfp->rf_expand);
256: if (rfp->rf_desc != NULL)
257: free(rfp->rf_desc);
258: free(rfp);
259: }
260:
261:
262: /*
263: * rcs_write()
264: *
265: * Write the contents of the RCS file handle <rfp> to disk in the file whose
266: * path is in <rf_path>.
267: * Returns 0 on success, or -1 on failure.
268: */
269:
270: int
271: rcs_write(RCSFILE *rfp)
272: {
273: FILE *fp;
1.7 jfb 274: char buf[1024], numbuf[64], *cp;
275: size_t rlen, len;
1.1 jfb 276: struct rcs_sym *symp;
277: struct rcs_delta *rdp;
278:
279: if (rfp->rf_flags & RCS_RF_SYNCED)
280: return (0);
281:
282: fp = fopen(rfp->rf_path, "w");
283: if (fp == NULL) {
284: cvs_log(LP_ERRNO, "failed to open RCS output file `%s'",
285: rfp->rf_path);
286: return (-1);
287: }
288:
289: rcsnum_tostr(rfp->rf_head, numbuf, sizeof(numbuf));
290: fprintf(fp, "head\t%s;\n", numbuf);
291: fprintf(fp, "access;\n");
292:
293: fprintf(fp, "symbols\n");
294: TAILQ_FOREACH(symp, &(rfp->rf_symbols), rs_list) {
295: rcsnum_tostr(symp->rs_num, numbuf, sizeof(numbuf));
296: snprintf(buf, sizeof(buf), "%s:%s", symp->rs_name, numbuf);
297: fprintf(fp, "\t%s", buf);
298: if (symp != TAILQ_LAST(&(rfp->rf_symbols), rcs_slist))
299: fputc('\n', fp);
300: }
301: fprintf(fp, ";\n");
302:
303: fprintf(fp, "locks;");
304:
305: if (rfp->rf_flags & RCS_RF_SLOCK)
306: fprintf(fp, " strict;");
307: fputc('\n', fp);
308:
309: if (rfp->rf_comment != NULL)
310: fprintf(fp, "comment\t@%s@;\n", rfp->rf_comment);
311:
312: if (rfp->rf_expand != NULL)
313: fprintf(fp, "expand @ %s @;\n", rfp->rf_expand);
314:
315: fprintf(fp, "\n\n");
316:
317: TAILQ_FOREACH(rdp, &(rfp->rf_delta), rd_list) {
318: fprintf(fp, "%s\n", rcsnum_tostr(rdp->rd_num, numbuf,
319: sizeof(numbuf)));
320: fprintf(fp, "date\t%d.%02d.%02d.%02d.%02d.%02d;",
321: rdp->rd_date.tm_year, rdp->rd_date.tm_mon + 1,
322: rdp->rd_date.tm_mday, rdp->rd_date.tm_hour,
323: rdp->rd_date.tm_min, rdp->rd_date.tm_sec);
324: fprintf(fp, "\tauthor %s;\tstate %s;\n",
325: rdp->rd_author, rdp->rd_state);
326: fprintf(fp, "branches;\n");
327: fprintf(fp, "next\t%s;\n\n", rcsnum_tostr(rdp->rd_next,
328: numbuf, sizeof(numbuf)));
329: }
330:
331: fprintf(fp, "\ndesc\n@%s@\n\n", rfp->rf_desc);
332:
333: /* deltatexts */
334: TAILQ_FOREACH(rdp, &(rfp->rf_delta), rd_list) {
335: fprintf(fp, "\n%s\n", rcsnum_tostr(rdp->rd_num, numbuf,
336: sizeof(numbuf)));
1.7 jfb 337: fprintf(fp, "log\n@%s@\ntext\n@", rdp->rd_log);
338:
339: cp = rdp->rd_text;
340: do {
341: len = sizeof(buf);
342: rlen = rcs_stresc(1, cp, buf, &len);
343: fprintf(fp, "%s", buf);
344: cp += rlen;
345: } while (len != 0);
346: fprintf(fp, "@\n\n");
1.1 jfb 347: }
348: fclose(fp);
349:
350: rfp->rf_flags |= RCS_RF_SYNCED;
351:
352: return (0);
353: }
354:
355:
356: /*
357: * rcs_addsym()
358: *
359: * Add a symbol to the list of symbols for the RCS file <rfp>. The new symbol
360: * is named <sym> and is bound to the RCS revision <snum>.
361: * Returns 0 on success, or -1 on failure.
362: */
363:
364: int
365: rcs_addsym(RCSFILE *rfp, const char *sym, RCSNUM *snum)
366: {
367: struct rcs_sym *symp;
368:
369: /* first look for duplication */
370: TAILQ_FOREACH(symp, &(rfp->rf_symbols), rs_list) {
371: if (strcmp(symp->rs_name, sym) == 0) {
372: return (-1);
373: }
374: }
375:
376: symp = (struct rcs_sym *)malloc(sizeof(*symp));
377: if (symp == NULL) {
378: cvs_log(LP_ERRNO, "failed to allocate RCS symbol");
379: return (-1);
380: }
381:
382: symp->rs_name = strdup(sym);
1.10 joris 383: if (symp->rs_name == NULL) {
384: cvs_log(LP_ERRNO, "failed to duplicate symbol");
385: free(symp);
386: return (-1);
387: }
388:
1.1 jfb 389: symp->rs_num = rcsnum_alloc();
1.11 joris 390: if (symp->rs_num == NULL) {
391: free(symp);
392: return (-1);
393: }
1.1 jfb 394: rcsnum_cpy(snum, symp->rs_num, 0);
395:
396: TAILQ_INSERT_HEAD(&(rfp->rf_symbols), symp, rs_list);
397:
398: /* not synced anymore */
399: rfp->rf_flags &= ~RCS_RF_SYNCED;
400:
401: return (0);
402: }
403:
404:
405: /*
406: * rcs_patch()
407: *
408: * Apply an RCS-format patch pointed to by <patch> to the file contents
409: * found in <data>.
410: * Returns 0 on success, or -1 on failure.
411: */
412:
413: BUF*
414: rcs_patch(const char *data, const char *patch)
415: {
1.5 vincent 416: struct rcs_foo *dlines, *plines;
417: struct rcs_line *lp;
1.1 jfb 418: size_t len;
1.5 vincent 419: int lineno;
1.1 jfb 420: BUF *res;
421:
422: len = strlen(data);
423: res = cvs_buf_alloc(len, BUF_AUTOEXT);
424: if (res == NULL)
425: return (NULL);
426:
427: dlines = rcs_splitlines(data);
428: if (dlines == NULL)
429: return (NULL);
1.5 vincent 430:
1.1 jfb 431: plines = rcs_splitlines(patch);
1.5 vincent 432: if (plines == NULL) {
433: rcs_freefoo(dlines);
1.1 jfb 434: return (NULL);
1.5 vincent 435: }
436:
437: if (rcs_patch_lines(dlines, plines) < 0) {
438: rcs_freefoo(plines);
439: rcs_freefoo(dlines);
440: return (NULL);
441: }
442:
443: lineno = 0;
444: TAILQ_FOREACH(lp, &dlines->rl_lines, rl_list) {
445: if (lineno != 0)
446: cvs_buf_fappend(res, "%s\n", lp->rl_line);
447: lineno++;
448: }
449:
450: rcs_freefoo(dlines);
451: rcs_freefoo(plines);
452: return (res);
453: }
454:
1.7 jfb 455: static int
1.5 vincent 456: rcs_patch_lines(struct rcs_foo *dlines, struct rcs_foo *plines)
457: {
458: char op, *ep;
459: struct rcs_line *lp, *dlp, *ndlp;
460: int i, lineno, nbln;
1.1 jfb 461:
462: dlp = TAILQ_FIRST(&(dlines->rl_lines));
463: lp = TAILQ_FIRST(&(plines->rl_lines));
464:
465: /* skip first bogus line */
466: for (lp = TAILQ_NEXT(lp, rl_list); lp != NULL;
467: lp = TAILQ_NEXT(lp, rl_list)) {
468: op = *(lp->rl_line);
469: lineno = (int)strtol((lp->rl_line + 1), &ep, 10);
470: if ((lineno > dlines->rl_nblines) || (lineno <= 0) ||
471: (*ep != ' ')) {
472: cvs_log(LP_ERR,
473: "invalid line specification in RCS patch");
474: return (NULL);
475: }
476: ep++;
477: nbln = (int)strtol(ep, &ep, 10);
478: if ((nbln <= 0) || (*ep != '\0')) {
479: cvs_log(LP_ERR,
480: "invalid line number specification in RCS patch");
481: return (NULL);
482: }
483:
484: /* find the appropriate line */
485: for (;;) {
486: if (dlp == NULL)
487: break;
488: if (dlp->rl_lineno == lineno)
489: break;
490: if (dlp->rl_lineno > lineno) {
491: dlp = TAILQ_PREV(dlp, rcs_tqh, rl_list);
492: }
493: else if (dlp->rl_lineno < lineno) {
494: ndlp = TAILQ_NEXT(dlp, rl_list);
495: if (ndlp->rl_lineno > lineno)
496: break;
497: dlp = ndlp;
498: }
499: }
500: if (dlp == NULL) {
501: cvs_log(LP_ERR,
502: "can't find referenced line in RCS patch");
503: return (NULL);
504: }
505:
506: if (op == 'd') {
507: for (i = 0; (i < nbln) && (dlp != NULL); i++) {
508: ndlp = TAILQ_NEXT(dlp, rl_list);
509: TAILQ_REMOVE(&(dlines->rl_lines), dlp, rl_list);
510: dlp = ndlp;
511: }
512: }
513: else if (op == 'a') {
514: for (i = 0; i < nbln; i++) {
515: ndlp = lp;
516: lp = TAILQ_NEXT(lp, rl_list);
517: if (lp == NULL) {
518: cvs_log(LP_ERR, "truncated RCS patch");
1.5 vincent 519: return (-1);
1.1 jfb 520: }
521: TAILQ_REMOVE(&(plines->rl_lines), lp, rl_list);
522: TAILQ_INSERT_AFTER(&(dlines->rl_lines), dlp,
523: lp, rl_list);
524: dlp = lp;
525:
526: /* we don't want lookup to block on those */
527: lp->rl_lineno = lineno;
528:
529: lp = ndlp;
530: }
531: }
532: else {
533: cvs_log(LP_ERR, "unknown RCS patch operation `%c'", op);
1.5 vincent 534: return (-1);
1.1 jfb 535: }
536:
537: /* last line of the patch, done */
538: if (lp->rl_lineno == plines->rl_nblines)
539: break;
540: }
541:
542: /* once we're done patching, rebuild the line numbers */
1.2 vincent 543: lineno = 0;
1.5 vincent 544: TAILQ_FOREACH(lp, &(dlines->rl_lines), rl_list)
1.1 jfb 545: lp->rl_lineno = lineno++;
546: dlines->rl_nblines = lineno - 1;
547:
1.5 vincent 548: return (0);
1.1 jfb 549: }
550:
551:
552: /*
553: * rcs_getrev()
554: *
555: * Get the whole contents of revision <rev> from the RCSFILE <rfp>. The
1.4 vincent 556: * returned buffer is dynamically allocated and should be released using
557: * cvs_buf_free() once the caller is done using it.
1.1 jfb 558: */
559:
560: BUF*
561: rcs_getrev(RCSFILE *rfp, RCSNUM *rev)
562: {
563: int res;
564: size_t len;
565: void *bp;
566: RCSNUM *crev;
567: BUF *rbuf;
568: struct rcs_delta *rdp = NULL;
569:
570: res = rcsnum_cmp(rfp->rf_head, rev, 0);
571: if (res == 1) {
572: cvs_log(LP_ERR, "sorry, can't travel in the future yet");
573: return (NULL);
574: }
575: else {
576: rdp = rcs_findrev(rfp, rfp->rf_head);
577: if (rdp == NULL) {
578: cvs_log(LP_ERR, "failed to get RCS HEAD revision");
579: return (NULL);
580: }
581:
582: len = strlen(rdp->rd_text);
583: rbuf = cvs_buf_alloc(len, BUF_AUTOEXT);
584: if (rbuf == NULL)
585: return (NULL);
586: cvs_buf_append(rbuf, rdp->rd_text, len);
587:
588: if (res != 0) {
589: /* Apply patches backwards to get the right version.
590: * This will need some rework to support sub branches.
591: */
592: crev = rcsnum_alloc();
1.11 joris 593: if (crev == NULL)
594: return (NULL);
1.1 jfb 595: rcsnum_cpy(rfp->rf_head, crev, 0);
596: do {
597: crev->rn_id[crev->rn_len - 1]--;
598: rdp = rcs_findrev(rfp, crev);
599: if (rdp == NULL)
600: return (NULL);
601:
602: cvs_buf_putc(rbuf, '\0');
603: bp = cvs_buf_release(rbuf);
604: rbuf = rcs_patch((char *)bp, rdp->rd_text);
605: if (rbuf == NULL)
606: break;
607: } while (rcsnum_cmp(crev, rev, 0) != 0);
608:
609: rcsnum_free(crev);
610: }
611: }
612:
613:
614: return (rbuf);
615: }
616:
617:
618: /*
619: * rcs_getrevbydate()
620: *
621: * Get an RCS revision by a specific date.
622: */
623:
624: RCSNUM*
625: rcs_getrevbydate(RCSFILE *rfp, struct tm *date)
626: {
627: return (NULL);
628: }
629:
630:
631: /*
632: * rcs_findrev()
633: *
634: * Find a specific revision's delta entry in the tree of the RCS file <rfp>.
635: * The revision number is given in <rev>.
636: * Returns a pointer to the delta on success, or NULL on failure.
637: */
638:
639: static struct rcs_delta*
640: rcs_findrev(RCSFILE *rfp, RCSNUM *rev)
641: {
642: u_int cmplen;
643: struct rcs_delta *rdp;
644: struct rcs_dlist *hp;
1.6 vincent 645: int found;
646:
1.1 jfb 647: cmplen = 2;
648: hp = &(rfp->rf_delta);
649:
1.6 vincent 650: do {
651: found = 0;
652: TAILQ_FOREACH(rdp, hp, rd_list) {
653: if (rcsnum_cmp(rdp->rd_num, rev, cmplen) == 0) {
654: if (cmplen == rev->rn_len)
655: return (rdp);
1.1 jfb 656:
1.6 vincent 657: hp = &(rdp->rd_snodes);
658: cmplen += 2;
659: found = 1;
660: break;
661: }
1.1 jfb 662: }
1.6 vincent 663: } while (found && cmplen < rev->rn_len);
1.1 jfb 664:
665: return (NULL);
666: }
667:
668:
669: /*
670: * rcs_parse()
671: *
672: * Parse the contents of file <path>, which are in the RCS format.
673: * Returns 0 on success, or -1 on failure.
674: */
675:
676: int
677: rcs_parse(RCSFILE *rfp)
678: {
679: int ret;
680: struct rcs_pdata *pdp;
681:
682: if (rfp->rf_flags & RCS_RF_PARSED)
683: return (0);
684:
685: pdp = (struct rcs_pdata *)malloc(sizeof(*pdp));
686: if (pdp == NULL) {
687: cvs_log(LP_ERRNO, "failed to allocate RCS parser data");
688: return (-1);
689: }
690: memset(pdp, 0, sizeof(*pdp));
691:
692: pdp->rp_line = 1;
693: pdp->rp_pttype = RCS_TOK_ERR;
694:
695: pdp->rp_file = fopen(rfp->rf_path, "r");
696: if (pdp->rp_file == NULL) {
697: cvs_log(LP_ERRNO, "failed to open RCS file `%s'", rfp->rf_path);
698: rcs_freepdata(pdp);
699: return (-1);
700: }
701:
702: pdp->rp_buf = (char *)malloc(RCS_BUFSIZE);
703: if (pdp->rp_buf == NULL) {
704: cvs_log(LP_ERRNO, "failed to allocate RCS parser buffer");
705: rcs_freepdata(pdp);
706: return (-1);
707: }
708: pdp->rp_blen = RCS_BUFSIZE;
709:
710: /* ditch the strict lock */
711: rfp->rf_flags &= ~RCS_RF_SLOCK;
712: rfp->rf_pdata = pdp;
713:
714: if (rcs_parse_admin(rfp) < 0) {
715: rcs_freepdata(pdp);
716: return (-1);
717: }
718:
719: for (;;) {
720: ret = rcs_parse_delta(rfp);
721: if (ret == 0)
722: break;
723: else if (ret == -1) {
724: rcs_freepdata(pdp);
725: return (-1);
726: }
727: }
728:
729: ret = rcs_gettok(rfp);
730: if (ret != RCS_TOK_DESC) {
731: cvs_log(LP_ERR, "token `%s' found where RCS desc expected",
732: RCS_TOKSTR(rfp));
733: rcs_freepdata(pdp);
734: return (-1);
735: }
736:
737: ret = rcs_gettok(rfp);
738: if (ret != RCS_TOK_STRING) {
739: cvs_log(LP_ERR, "token `%s' found where RCS desc expected",
740: RCS_TOKSTR(rfp));
741: rcs_freepdata(pdp);
742: return (-1);
743: }
744:
745: rfp->rf_desc = strdup(RCS_TOKSTR(rfp));
1.10 joris 746: if (rfp->rf_desc == NULL) {
747: cvs_log(LP_ERRNO, "failed to duplicate rcs token");
748: rcs_freepdata(pdp);
749: return (-1);
750: }
1.1 jfb 751:
752: for (;;) {
753: ret = rcs_parse_deltatext(rfp);
754: if (ret == 0)
755: break;
756: else if (ret == -1) {
757: rcs_freepdata(pdp);
758: return (-1);
759: }
760: }
761:
762: cvs_log(LP_DEBUG, "RCS file `%s' parsed OK (%u lines)", rfp->rf_path,
763: pdp->rp_line);
764:
765: rcs_freepdata(pdp);
766:
767: rfp->rf_pdata = NULL;
768: rfp->rf_flags |= RCS_RF_PARSED|RCS_RF_SYNCED;
769:
770: return (0);
771: }
772:
773:
774: /*
775: * rcs_parse_admin()
776: *
777: * Parse the administrative portion of an RCS file.
778: * Returns 0 on success, or -1 on failure.
779: */
780:
781: static int
782: rcs_parse_admin(RCSFILE *rfp)
783: {
784: u_int i;
785: int tok, ntok, hmask;
786: struct rcs_key *rk;
787:
788: /* hmask is a mask of the headers already encountered */
789: hmask = 0;
790: for (;;) {
791: tok = rcs_gettok(rfp);
792: if (tok == RCS_TOK_ERR) {
793: cvs_log(LP_ERR, "parse error in RCS admin section");
794: return (-1);
795: }
796: else if (tok == RCS_TOK_NUM) {
797: /* assume this is the start of the first delta */
798: rcs_pushtok(rfp, RCS_TOKSTR(rfp), tok);
799: return (0);
800: }
801:
802: rk = NULL;
803: for (i = 0; i < sizeof(rcs_keys)/sizeof(rcs_keys[0]); i++)
804: if (rcs_keys[i].rk_id == tok)
805: rk = &(rcs_keys[i]);
806:
807: if (hmask & (1 << tok)) {
808: cvs_log(LP_ERR, "duplicate RCS key");
809: return (-1);
810: }
811: hmask |= (1 << tok);
812:
813: switch (tok) {
814: case RCS_TOK_HEAD:
815: case RCS_TOK_BRANCH:
816: case RCS_TOK_COMMENT:
817: case RCS_TOK_EXPAND:
818: ntok = rcs_gettok(rfp);
819: if (ntok == RCS_TOK_SCOLON)
820: break;
821: if (ntok != rk->rk_val) {
822: cvs_log(LP_ERR,
823: "invalid value type for RCS key `%s'",
824: rk->rk_str);
825: }
826:
827: if (tok == RCS_TOK_HEAD) {
828: rcsnum_aton(RCS_TOKSTR(rfp), NULL,
829: rfp->rf_head);
830: }
831: else if (tok == RCS_TOK_BRANCH) {
832: rcsnum_aton(RCS_TOKSTR(rfp), NULL,
833: rfp->rf_branch);
834: }
835: else if (tok == RCS_TOK_COMMENT) {
836: rfp->rf_comment = strdup(RCS_TOKSTR(rfp));
1.10 joris 837: if (rfp->rf_comment == NULL) {
838: cvs_log(LP_ERRNO,
839: "failed to duplicate rcs token");
840: return (-1);
841: }
1.1 jfb 842: }
843: else if (tok == RCS_TOK_EXPAND) {
844: rfp->rf_expand = strdup(RCS_TOKSTR(rfp));
1.10 joris 845: if (rfp->rf_expand == NULL) {
846: cvs_log(LP_ERRNO,
847: "failed to duplicate rcs token");
848: return (-1);
849: }
1.1 jfb 850: }
851:
852: /* now get the expected semi-colon */
853: ntok = rcs_gettok(rfp);
854: if (ntok != RCS_TOK_SCOLON) {
855: cvs_log(LP_ERR,
856: "missing semi-colon after RCS `%s' key",
857: rk->rk_str);
858: return (-1);
859: }
860: break;
861: case RCS_TOK_ACCESS:
862: rcs_parse_access(rfp);
863: break;
864: case RCS_TOK_SYMBOLS:
865: rcs_parse_symbols(rfp);
866: break;
867: case RCS_TOK_LOCKS:
868: rcs_parse_locks(rfp);
869: break;
870: default:
871: cvs_log(LP_ERR,
872: "unexpected token `%s' in RCS admin section",
873: RCS_TOKSTR(rfp));
874: return (-1);
875: }
876: }
877:
878: return (0);
879: }
880:
881:
882: /*
883: * rcs_parse_delta()
884: *
885: * Parse an RCS delta section and allocate the structure to store that delta's
886: * information in the <rfp> delta list.
887: * Returns 1 if the section was parsed OK, 0 if it is the last delta, and
888: * -1 on error.
889: */
890:
891: static int
892: rcs_parse_delta(RCSFILE *rfp)
893: {
894: int ret, tok, ntok, hmask;
895: u_int i;
896: char *tokstr;
1.3 vincent 897: RCSNUM *datenum;
1.1 jfb 898: struct rcs_delta *rdp;
899: struct rcs_key *rk;
900:
901: rdp = (struct rcs_delta *)malloc(sizeof(*rdp));
902: if (rdp == NULL) {
903: cvs_log(LP_ERRNO, "failed to allocate RCS delta structure");
904: return (-1);
905: }
906: memset(rdp, 0, sizeof(*rdp));
907:
908: rdp->rd_num = rcsnum_alloc();
1.11 joris 909: if (rdp->rd_num == NULL) {
910: rcs_freedelta(rdp);
911: return (-1);
912: }
1.1 jfb 913: rdp->rd_next = rcsnum_alloc();
1.11 joris 914: if (rdp->rd_next == NULL) {
915: rcs_freedelta(rdp);
916: return (-1);
917: }
1.1 jfb 918:
919: TAILQ_INIT(&(rdp->rd_branches));
920:
921: tok = rcs_gettok(rfp);
922: if (tok != RCS_TOK_NUM) {
923: cvs_log(LP_ERR, "unexpected token `%s' at start of delta",
924: RCS_TOKSTR(rfp));
925: rcs_freedelta(rdp);
926: return (-1);
927: }
928: rcsnum_aton(RCS_TOKSTR(rfp), NULL, rdp->rd_num);
929:
930: hmask = 0;
931: ret = 0;
932: tokstr = NULL;
933:
934: for (;;) {
935: tok = rcs_gettok(rfp);
936: if (tok == RCS_TOK_ERR) {
937: cvs_log(LP_ERR, "parse error in RCS delta section");
938: rcs_freedelta(rdp);
939: return (-1);
940: }
941: else if (tok == RCS_TOK_NUM || tok == RCS_TOK_DESC) {
942: rcs_pushtok(rfp, RCS_TOKSTR(rfp), tok);
943: ret = (tok == RCS_TOK_NUM ? 1 : 0);
944: break;
945: }
946:
947: rk = NULL;
948: for (i = 0; i < sizeof(rcs_keys)/sizeof(rcs_keys[0]); i++)
949: if (rcs_keys[i].rk_id == tok)
950: rk = &(rcs_keys[i]);
951:
952: if (hmask & (1 << tok)) {
953: cvs_log(LP_ERR, "duplicate RCS key");
954: rcs_freedelta(rdp);
955: return (-1);
956: }
957: hmask |= (1 << tok);
958:
959: switch (tok) {
960: case RCS_TOK_DATE:
961: case RCS_TOK_AUTHOR:
962: case RCS_TOK_STATE:
963: case RCS_TOK_NEXT:
964: ntok = rcs_gettok(rfp);
965: if (ntok == RCS_TOK_SCOLON) {
966: if (rk->rk_flags & RCS_VOPT)
967: break;
968: else {
969: cvs_log(LP_ERR, "missing mandatory "
970: "value to RCS key `%s'",
971: rk->rk_str);
972: rcs_freedelta(rdp);
973: return (-1);
974: }
975: }
976:
977: if (ntok != rk->rk_val) {
978: cvs_log(LP_ERR,
979: "invalid value type for RCS key `%s'",
980: rk->rk_str);
981: rcs_freedelta(rdp);
982: return (-1);
983: }
984:
985: if (tokstr != NULL)
986: free(tokstr);
987: tokstr = strdup(RCS_TOKSTR(rfp));
1.10 joris 988: if (tokstr == NULL) {
989: cvs_log(LP_ERRNO,
990: "failed to duplicate rcs token");
991: rcs_freedelta(rdp);
992: return (-1);
993: }
1.1 jfb 994:
995: /* now get the expected semi-colon */
996: ntok = rcs_gettok(rfp);
997: if (ntok != RCS_TOK_SCOLON) {
998: cvs_log(LP_ERR,
999: "missing semi-colon after RCS `%s' key",
1000: rk->rk_str);
1001: rcs_freedelta(rdp);
1002: return (-1);
1003: }
1004:
1005: if (tok == RCS_TOK_DATE) {
1.3 vincent 1006: datenum = rcsnum_alloc();
1.11 joris 1007: if (datenum == NULL) {
1008: rcs_freedelta(rdp);
1009: return (-1);
1010: }
1.3 vincent 1011: rcsnum_aton(tokstr, NULL, datenum);
1012: if (datenum->rn_len != 6) {
1.1 jfb 1013: cvs_log(LP_ERR,
1014: "RCS date specification has %s "
1015: "fields",
1.3 vincent 1016: (datenum->rn_len > 6) ? "too many" :
1.1 jfb 1017: "missing");
1018: rcs_freedelta(rdp);
1019: }
1.3 vincent 1020: rdp->rd_date.tm_year = datenum->rn_id[0];
1021: rdp->rd_date.tm_mon = datenum->rn_id[1] - 1;
1022: rdp->rd_date.tm_mday = datenum->rn_id[2];
1023: rdp->rd_date.tm_hour = datenum->rn_id[3];
1024: rdp->rd_date.tm_min = datenum->rn_id[4];
1025: rdp->rd_date.tm_sec = datenum->rn_id[5];
1026: rcsnum_free(datenum);
1.1 jfb 1027: }
1028: else if (tok == RCS_TOK_AUTHOR) {
1029: rdp->rd_author = tokstr;
1030: tokstr = NULL;
1031: }
1032: else if (tok == RCS_TOK_STATE) {
1033: rdp->rd_state = tokstr;
1034: tokstr = NULL;
1035: }
1036: else if (tok == RCS_TOK_NEXT) {
1037: rcsnum_aton(tokstr, NULL, rdp->rd_next);
1038: }
1039: break;
1040: case RCS_TOK_BRANCHES:
1041: rcs_parse_branches(rfp, rdp);
1042: break;
1043: default:
1044: cvs_log(LP_ERR,
1045: "unexpected token `%s' in RCS delta",
1046: RCS_TOKSTR(rfp));
1047: rcs_freedelta(rdp);
1048: return (-1);
1049: }
1050: }
1051:
1052: TAILQ_INSERT_TAIL(&(rfp->rf_delta), rdp, rd_list);
1053:
1054: return (ret);
1055: }
1056:
1057:
1058: /*
1059: * rcs_parse_deltatext()
1060: *
1061: * Parse an RCS delta text section and fill in the log and text field of the
1062: * appropriate delta section.
1063: * Returns 1 if the section was parsed OK, 0 if it is the last delta, and
1064: * -1 on error.
1065: */
1066:
1067: static int
1068: rcs_parse_deltatext(RCSFILE *rfp)
1069: {
1070: int tok;
1071: RCSNUM *tnum;
1072: struct rcs_delta *rdp;
1073:
1074: tnum = rcsnum_alloc();
1075: if (tnum == NULL)
1076: return (-1);
1077:
1078: tok = rcs_gettok(rfp);
1079: if (tok == RCS_TOK_EOF)
1080: return (0);
1081:
1082: if (tok != RCS_TOK_NUM) {
1083: cvs_log(LP_ERR,
1084: "unexpected token `%s' at start of RCS delta text",
1085: RCS_TOKSTR(rfp));
1086: return (-1);
1087: }
1088: rcsnum_aton(RCS_TOKSTR(rfp), NULL, tnum);
1089:
1090: TAILQ_FOREACH(rdp, &(rfp->rf_delta), rd_list) {
1091: if (rcsnum_cmp(tnum, rdp->rd_num, 0) == 0)
1092: break;
1093: }
1094: if (rdp == NULL) {
1095: cvs_log(LP_ERR, "RCS delta text `%s' has no matching delta",
1096: RCS_TOKSTR(rfp));
1097: return (-1);
1098: }
1099:
1100: tok = rcs_gettok(rfp);
1101: if (tok != RCS_TOK_LOG) {
1102: cvs_log(LP_ERR, "unexpected token `%s' where RCS log expected",
1103: RCS_TOKSTR(rfp));
1104: return (-1);
1105: }
1106:
1107: tok = rcs_gettok(rfp);
1108: if (tok != RCS_TOK_STRING) {
1109: cvs_log(LP_ERR, "unexpected token `%s' where RCS log expected",
1110: RCS_TOKSTR(rfp));
1111: return (-1);
1112: }
1113: rdp->rd_log = strdup(RCS_TOKSTR(rfp));
1114: if (rdp->rd_log == NULL) {
1115: cvs_log(LP_ERRNO, "failed to copy RCS deltatext log");
1116: return (-1);
1117: }
1118:
1119: tok = rcs_gettok(rfp);
1120: if (tok != RCS_TOK_TEXT) {
1121: cvs_log(LP_ERR, "unexpected token `%s' where RCS text expected",
1122: RCS_TOKSTR(rfp));
1123: return (-1);
1124: }
1125:
1126: tok = rcs_gettok(rfp);
1127: if (tok != RCS_TOK_STRING) {
1128: cvs_log(LP_ERR, "unexpected token `%s' where RCS text expected",
1129: RCS_TOKSTR(rfp));
1130: return (-1);
1131: }
1132:
1133: rdp->rd_text = strdup(RCS_TOKSTR(rfp));
1134: if (rdp->rd_text == NULL) {
1135: cvs_log(LP_ERRNO, "failed to copy RCS delta text");
1136: return (-1);
1137: }
1138:
1139: return (1);
1140: }
1141:
1142:
1143: /*
1144: * rcs_parse_access()
1145: *
1146: * Parse the access list given as value to the `access' keyword.
1147: * Returns 0 on success, or -1 on failure.
1148: */
1149:
1150: static int
1151: rcs_parse_access(RCSFILE *rfp)
1152: {
1153: int type;
1154:
1155: while ((type = rcs_gettok(rfp)) != RCS_TOK_SCOLON) {
1156: if (type != RCS_TOK_ID) {
1157: cvs_log(LP_ERR, "unexpected token `%s' in access list",
1158: RCS_TOKSTR(rfp));
1159: return (-1);
1160: }
1161: }
1162:
1163: return (0);
1164: }
1165:
1166:
1167: /*
1168: * rcs_parse_symbols()
1169: *
1170: * Parse the symbol list given as value to the `symbols' keyword.
1171: * Returns 0 on success, or -1 on failure.
1172: */
1173:
1174: static int
1175: rcs_parse_symbols(RCSFILE *rfp)
1176: {
1177: int type;
1178: struct rcs_sym *symp;
1179:
1180: for (;;) {
1181: type = rcs_gettok(rfp);
1182: if (type == RCS_TOK_SCOLON)
1183: break;
1184:
1185: if (type != RCS_TOK_STRING) {
1186: cvs_log(LP_ERR, "unexpected token `%s' in symbol list",
1187: RCS_TOKSTR(rfp));
1188: return (-1);
1189: }
1190:
1191: symp = (struct rcs_sym *)malloc(sizeof(*symp));
1192: if (symp == NULL) {
1193: cvs_log(LP_ERRNO, "failed to allocate RCS symbol");
1194: return (-1);
1195: }
1196: symp->rs_name = strdup(RCS_TOKSTR(rfp));
1.10 joris 1197: if (symp->rs_name == NULL) {
1198: cvs_log(LP_ERRNO, "failed to duplicate rcs token");
1199: free(symp);
1200: return (-1);
1201: }
1202:
1.1 jfb 1203: symp->rs_num = rcsnum_alloc();
1.11 joris 1204: if (symp->rs_num == NULL) {
1205: cvs_log(LP_ERRNO, "failed to allocate rcsnum info");
1206: free(symp);
1207: return (-1);
1208: }
1.1 jfb 1209:
1210: type = rcs_gettok(rfp);
1211: if (type != RCS_TOK_COLON) {
1212: cvs_log(LP_ERR, "unexpected token `%s' in symbol list",
1213: RCS_TOKSTR(rfp));
1.11 joris 1214: rcsnum_free(symp->rs_num);
1.1 jfb 1215: free(symp->rs_name);
1216: free(symp);
1217: return (-1);
1218: }
1219:
1220: type = rcs_gettok(rfp);
1221: if (type != RCS_TOK_NUM) {
1222: cvs_log(LP_ERR, "unexpected token `%s' in symbol list",
1223: RCS_TOKSTR(rfp));
1.11 joris 1224: rcsnum_free(symp->rs_num);
1.1 jfb 1225: free(symp->rs_name);
1226: free(symp);
1227: return (-1);
1228: }
1229:
1230: if (rcsnum_aton(RCS_TOKSTR(rfp), NULL, symp->rs_num) < 0) {
1231: cvs_log(LP_ERR, "failed to parse RCS NUM `%s'",
1232: RCS_TOKSTR(rfp));
1.11 joris 1233: rcsnum_free(symp->rs_num);
1.1 jfb 1234: free(symp->rs_name);
1235: free(symp);
1236: return (-1);
1237: }
1238:
1239: TAILQ_INSERT_HEAD(&(rfp->rf_symbols), symp, rs_list);
1240: }
1241:
1242: return (0);
1243: }
1244:
1245:
1246: /*
1247: * rcs_parse_locks()
1248: *
1249: * Parse the lock list given as value to the `locks' keyword.
1250: * Returns 0 on success, or -1 on failure.
1251: */
1252:
1253: static int
1254: rcs_parse_locks(RCSFILE *rfp)
1255: {
1256: int type;
1257: struct rcs_lock *lkp;
1258:
1259: for (;;) {
1260: type = rcs_gettok(rfp);
1261: if (type == RCS_TOK_SCOLON)
1262: break;
1263:
1264: if (type != RCS_TOK_ID) {
1265: cvs_log(LP_ERR, "unexpected token `%s' in lock list",
1266: RCS_TOKSTR(rfp));
1267: return (-1);
1268: }
1269:
1270: lkp = (struct rcs_lock *)malloc(sizeof(*lkp));
1271: if (lkp == NULL) {
1272: cvs_log(LP_ERRNO, "failed to allocate RCS lock");
1273: return (-1);
1274: }
1275: lkp->rl_num = rcsnum_alloc();
1.11 joris 1276: if (lkp->rl_num == NULL) {
1277: free(lkp);
1278: return (-1);
1279: }
1.1 jfb 1280:
1281: type = rcs_gettok(rfp);
1282: if (type != RCS_TOK_COLON) {
1283: cvs_log(LP_ERR, "unexpected token `%s' in symbol list",
1284: RCS_TOKSTR(rfp));
1285: free(lkp);
1286: return (-1);
1287: }
1288:
1289: type = rcs_gettok(rfp);
1290: if (type != RCS_TOK_NUM) {
1291: cvs_log(LP_ERR, "unexpected token `%s' in symbol list",
1292: RCS_TOKSTR(rfp));
1293: free(lkp);
1294: return (-1);
1295: }
1296:
1297: if (rcsnum_aton(RCS_TOKSTR(rfp), NULL, lkp->rl_num) < 0) {
1298: cvs_log(LP_ERR, "failed to parse RCS NUM `%s'",
1299: RCS_TOKSTR(rfp));
1300: free(lkp);
1301: return (-1);
1302: }
1303:
1304: TAILQ_INSERT_HEAD(&(rfp->rf_locks), lkp, rl_list);
1305: }
1306:
1307: /* check if we have a `strict' */
1308: type = rcs_gettok(rfp);
1309: if (type != RCS_TOK_STRICT) {
1310: rcs_pushtok(rfp, RCS_TOKSTR(rfp), type);
1311: }
1312: else {
1313: rfp->rf_flags |= RCS_RF_SLOCK;
1314:
1315: type = rcs_gettok(rfp);
1316: if (type != RCS_TOK_SCOLON) {
1317: cvs_log(LP_ERR,
1318: "missing semi-colon after `strict' keyword");
1319: return (-1);
1320: }
1321: }
1322:
1323: return (0);
1324: }
1325:
1326: /*
1327: * rcs_parse_branches()
1328: *
1329: * Parse the list of branches following a `branches' keyword in a delta.
1330: * Returns 0 on success, or -1 on failure.
1331: */
1332:
1333: static int
1334: rcs_parse_branches(RCSFILE *rfp, struct rcs_delta *rdp)
1335: {
1336: int type;
1337: struct rcs_branch *brp;
1338:
1339: for (;;) {
1340: type = rcs_gettok(rfp);
1341: if (type == RCS_TOK_SCOLON)
1342: break;
1343:
1344: if (type != RCS_TOK_NUM) {
1345: cvs_log(LP_ERR,
1346: "unexpected token `%s' in list of branches",
1347: RCS_TOKSTR(rfp));
1348: return (-1);
1349: }
1350:
1351: brp = (struct rcs_branch *)malloc(sizeof(*brp));
1352: if (brp == NULL) {
1353: cvs_log(LP_ERRNO, "failed to allocate RCS branch");
1354: return (-1);
1355: }
1356: brp->rb_num = rcsnum_alloc();
1.11 joris 1357: if (brp->rb_num == NULL) {
1358: free(brp);
1359: return (-1);
1360: }
1361:
1.1 jfb 1362: rcsnum_aton(RCS_TOKSTR(rfp), NULL, brp->rb_num);
1363:
1364: TAILQ_INSERT_TAIL(&(rdp->rd_branches), brp, rb_list);
1365: }
1366:
1367: return (0);
1368: }
1369:
1370:
1371: /*
1372: * rcs_freedelta()
1373: *
1374: * Free the contents of a delta structure.
1375: */
1376:
1377: void
1378: rcs_freedelta(struct rcs_delta *rdp)
1379: {
1.12 ! jfb 1380: struct rcs_branch *rb;
1.1 jfb 1381: struct rcs_delta *crdp;
1382:
1.12 ! jfb 1383: if (rdp->rd_num != NULL)
! 1384: rcsnum_free(rdp->rd_num);
! 1385: if (rdp->rd_next != NULL)
! 1386: rcsnum_free(rdp->rd_next);
! 1387:
1.1 jfb 1388: if (rdp->rd_author != NULL)
1389: free(rdp->rd_author);
1390: if (rdp->rd_state != NULL)
1391: free(rdp->rd_state);
1392: if (rdp->rd_log != NULL)
1393: free(rdp->rd_log);
1394: if (rdp->rd_text != NULL)
1395: free(rdp->rd_text);
1.12 ! jfb 1396:
! 1397: while ((rb = TAILQ_FIRST(&(rdp->rd_branches))) != NULL) {
! 1398: TAILQ_REMOVE(&(rdp->rd_branches), rb, rb_list);
! 1399: rcsnum_free(rb->rb_num);
! 1400: free(rb);
! 1401: }
1.1 jfb 1402:
1403: while ((crdp = TAILQ_FIRST(&(rdp->rd_snodes))) != NULL) {
1404: TAILQ_REMOVE(&(rdp->rd_snodes), crdp, rd_list);
1405: rcs_freedelta(crdp);
1406: }
1407:
1408: free(rdp);
1409: }
1410:
1411:
1412: /*
1413: * rcs_freepdata()
1414: *
1415: * Free the contents of the parser data structure.
1416: */
1417:
1418: static void
1419: rcs_freepdata(struct rcs_pdata *pd)
1420: {
1421: if (pd->rp_file != NULL)
1422: (void)fclose(pd->rp_file);
1423: if (pd->rp_buf != NULL)
1424: free(pd->rp_buf);
1425: free(pd);
1426: }
1427:
1428:
1429: /*
1430: * rcs_gettok()
1431: *
1432: * Get the next RCS token from the string <str>.
1433: */
1434:
1435: static int
1436: rcs_gettok(RCSFILE *rfp)
1437: {
1438: u_int i;
1439: int ch, last, type;
1440: char *bp, *bep;
1441: struct rcs_pdata *pdp = (struct rcs_pdata *)rfp->rf_pdata;
1442:
1443: type = RCS_TOK_ERR;
1444: bp = pdp->rp_buf;
1445: bep = pdp->rp_buf + pdp->rp_blen - 1;
1446: *bp = '\0';
1447:
1448: if (pdp->rp_pttype != RCS_TOK_ERR) {
1449: type = pdp->rp_pttype;
1450: strlcpy(pdp->rp_buf, pdp->rp_ptok, pdp->rp_blen);
1451: pdp->rp_pttype = RCS_TOK_ERR;
1452: return (type);
1453: }
1454:
1455: /* skip leading whitespace */
1456: /* XXX we must skip backspace too for compatibility, should we? */
1457: do {
1458: ch = getc(pdp->rp_file);
1459: if (ch == '\n')
1460: pdp->rp_line++;
1461: } while (isspace(ch));
1462:
1463: if (ch == EOF) {
1464: type = RCS_TOK_EOF;
1465: }
1466: else if (ch == ';') {
1467: type = RCS_TOK_SCOLON;
1468: }
1469: else if (ch == ':') {
1470: type = RCS_TOK_COLON;
1471: }
1472: else if (isalpha(ch)) {
1473: *(bp++) = ch;
1474: while (bp <= bep - 1) {
1475: ch = getc(pdp->rp_file);
1.11 joris 1476: if (!isalnum(ch) && ch != '_' && ch != '-') {
1.1 jfb 1477: ungetc(ch, pdp->rp_file);
1478: break;
1479: }
1480: *(bp++) = ch;
1481: }
1482: *bp = '\0';
1483:
1484: for (i = 0; i < sizeof(rcs_keys)/sizeof(rcs_keys[0]); i++) {
1485: if (strcmp(rcs_keys[i].rk_str, pdp->rp_buf) == 0) {
1486: type = rcs_keys[i].rk_id;
1487: break;
1488: }
1489: }
1490:
1491: /* not a keyword, assume it's just a string */
1492: if (type == RCS_TOK_ERR)
1493: type = RCS_TOK_STRING;
1.11 joris 1494:
1.1 jfb 1495: }
1496: else if (ch == '@') {
1497: /* we have a string */
1498: for (;;) {
1499: ch = getc(pdp->rp_file);
1500: if (ch == '@') {
1501: ch = getc(pdp->rp_file);
1502: if (ch != '@') {
1503: ungetc(ch, pdp->rp_file);
1504: break;
1505: }
1506: }
1507: else if (ch == '\n')
1508: pdp->rp_line++;
1509:
1510: *(bp++) = ch;
1511: if (bp == bep)
1512: break;
1513: }
1514:
1515: *bp = '\0';
1516: type = RCS_TOK_STRING;
1517: }
1518: else if (isdigit(ch)) {
1519: *(bp++) = ch;
1520: last = ch;
1521: type = RCS_TOK_NUM;
1522:
1523: for (;;) {
1524: ch = getc(pdp->rp_file);
1525: if (bp == bep)
1526: break;
1527: if (!isdigit(ch) && ch != '.') {
1528: ungetc(ch, pdp->rp_file);
1529: break;
1530: }
1531:
1532: if (last == '.' && ch == '.') {
1533: type = RCS_TOK_ERR;
1534: break;
1535: }
1536: last = ch;
1537: *(bp++) = ch;
1538: }
1539: *(bp) = '\0';
1540: }
1541:
1542: return (type);
1543: }
1544:
1545:
1546: /*
1547: * rcs_pushtok()
1548: *
1549: * Push a token back in the parser's token buffer.
1550: */
1551:
1552: static int
1553: rcs_pushtok(RCSFILE *rfp, const char *tok, int type)
1554: {
1555: struct rcs_pdata *pdp = (struct rcs_pdata *)rfp->rf_pdata;
1556:
1557: if (pdp->rp_pttype != RCS_TOK_ERR)
1558: return (-1);
1559:
1560: pdp->rp_pttype = type;
1561: strlcpy(pdp->rp_ptok, tok, sizeof(pdp->rp_ptok));
1562: return (0);
1563: }
1564:
1565:
1566: /*
1567: * rcs_stresc()
1568: *
1569: * Performs either escaping or unescaping of the string stored in <str>.
1570: * The operation is to escape special RCS characters if the <esc> argument
1571: * is 1, or unescape otherwise. The result is stored in the <buf> destination
1572: * buffer, and <blen> must originally point to the size of <buf>.
1573: * Returns the number of bytes which have been read from the source <str> and
1574: * operated on. The <blen> parameter will contain the number of bytes
1575: * actually copied in <buf>.
1576: */
1577:
1578: size_t
1579: rcs_stresc(int esc, const char *str, char *buf, size_t *blen)
1580: {
1581: size_t rlen;
1582: const char *sp;
1583: char *bp, *bep;
1584:
1585: rlen = 0;
1586: bp = buf;
1587: bep = buf + *blen - 1;
1588:
1589: for (sp = str; (*sp != '\0') && (bp <= (bep - 1)); sp++) {
1590: if (*sp == '@') {
1591: if (esc) {
1592: if (bp > (bep - 2))
1593: break;
1594: *(bp++) = '@';
1595: }
1596: else {
1597: sp++;
1598: if (*sp != '@') {
1599: cvs_log(LP_WARN,
1600: "unknown escape character `%c' in "
1601: "RCS file", *sp);
1602: if (*sp == '\0')
1603: break;
1604: }
1605: }
1606: }
1607:
1608: *(bp++) = *sp;
1609: }
1610:
1611: *bp = '\0';
1612: *blen = (bp - buf);
1613: return (sp - str);
1614: }
1615:
1616:
1617: /*
1618: * rcs_splitlines()
1619: *
1620: * Split the contents of a file into a list of lines.
1621: */
1622:
1623: static struct rcs_foo*
1624: rcs_splitlines(const char *fcont)
1625: {
1626: char *dcp;
1627: struct rcs_foo *foo;
1628: struct rcs_line *lp;
1629:
1630: foo = (struct rcs_foo *)malloc(sizeof(*foo));
1631: if (foo == NULL) {
1632: cvs_log(LP_ERR, "failed to allocate line structure");
1633: return (NULL);
1634: }
1635: TAILQ_INIT(&(foo->rl_lines));
1636: foo->rl_nblines = 0;
1637: foo->rl_data = strdup(fcont);
1638: if (foo->rl_data == NULL) {
1639: cvs_log(LP_ERRNO, "failed to copy file contents");
1640: free(foo);
1641: return (NULL);
1642: }
1643:
1644: /*
1645: * Add a first bogus line with line number 0. This is used so we
1646: * can position the line pointer before 1 when changing the first line
1647: * in rcs_patch().
1648: */
1649: lp = (struct rcs_line *)malloc(sizeof(*lp));
1.5 vincent 1650: if (lp == NULL)
1.1 jfb 1651: return (NULL);
1.5 vincent 1652:
1.1 jfb 1653: lp->rl_line = NULL;
1654: lp->rl_lineno = 0;
1655: TAILQ_INSERT_TAIL(&(foo->rl_lines), lp, rl_list);
1656:
1657:
1658: for (dcp = foo->rl_data; *dcp != '\0';) {
1659: lp = (struct rcs_line *)malloc(sizeof(*lp));
1660: if (lp == NULL) {
1661: cvs_log(LP_ERR, "failed to allocate line entry");
1662: return (NULL);
1663: }
1664:
1665: lp->rl_line = dcp;
1666: lp->rl_lineno = ++(foo->rl_nblines);
1667: TAILQ_INSERT_TAIL(&(foo->rl_lines), lp, rl_list);
1668:
1669: dcp = strchr(dcp, '\n');
1670: if (dcp == NULL) {
1671: break;
1672: }
1673: *(dcp++) = '\0';
1674: }
1675:
1676: return (foo);
1.5 vincent 1677: }
1678:
1679: static void
1680: rcs_freefoo(struct rcs_foo *fp)
1681: {
1682: struct rcs_line *lp;
1683:
1684: while ((lp = TAILQ_FIRST(&fp->rl_lines)) != NULL) {
1685: TAILQ_REMOVE(&fp->rl_lines, lp, rl_list);
1686: free(lp);
1687: }
1688: free(fp->rl_data);
1689: free(fp);
1.1 jfb 1690: }