/* $OpenBSD: rcs.c,v 1.6 2004/07/14 19:40:10 vincent Exp $ */ /* * Copyright (c) 2004 Jean-Francois Brousseau * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include #include #include #include #include #include #include #include #include "rcs.h" #include "log.h" #define RCS_BUFSIZE 8192 /* RCS token types */ #define RCS_TOK_ERR -1 #define RCS_TOK_EOF 0 #define RCS_TOK_NUM 1 #define RCS_TOK_ID 2 #define RCS_TOK_STRING 3 #define RCS_TOK_SCOLON 4 #define RCS_TOK_COLON 5 #define RCS_TOK_HEAD 8 #define RCS_TOK_BRANCH 9 #define RCS_TOK_ACCESS 10 #define RCS_TOK_SYMBOLS 11 #define RCS_TOK_LOCKS 12 #define RCS_TOK_COMMENT 13 #define RCS_TOK_EXPAND 14 #define RCS_TOK_DATE 15 #define RCS_TOK_AUTHOR 16 #define RCS_TOK_STATE 17 #define RCS_TOK_NEXT 18 #define RCS_TOK_BRANCHES 19 #define RCS_TOK_DESC 20 #define RCS_TOK_LOG 21 #define RCS_TOK_TEXT 22 #define RCS_TOK_STRICT 23 #define RCS_ISKEY(t) (((t) >= RCS_TOK_HEAD) && ((t) <= RCS_TOK_BRANCHES)) #define RCS_NOSCOL 0x01 /* no terminating semi-colon */ #define RCS_VOPT 0x02 /* value is optional */ /* opaque parse data */ struct rcs_pdata { u_int rp_line; char *rp_buf; size_t rp_blen; /* pushback token buffer */ char rp_ptok[128]; int rp_pttype; /* token type, RCS_TOK_ERR if no token */ FILE *rp_file; }; struct rcs_line { char *rl_line; int rl_lineno; TAILQ_ENTRY(rcs_line) rl_list; }; TAILQ_HEAD(rcs_tqh, rcs_line); struct rcs_foo { int rl_nblines; char *rl_data; struct rcs_tqh rl_lines; }; static int rcs_parse_admin (RCSFILE *); static int rcs_parse_delta (RCSFILE *); static int rcs_parse_deltatext (RCSFILE *); static int rcs_parse_access (RCSFILE *); static int rcs_parse_symbols (RCSFILE *); static int rcs_parse_locks (RCSFILE *); static int rcs_parse_branches (RCSFILE *, struct rcs_delta *); static void rcs_freedelta (struct rcs_delta *); static void rcs_freepdata (struct rcs_pdata *); static int rcs_gettok (RCSFILE *); static int rcs_pushtok (RCSFILE *, const char *, int); int rcs_patch_lines(struct rcs_foo *, struct rcs_foo *); static struct rcs_delta* rcs_findrev (RCSFILE *, RCSNUM *); static struct rcs_foo* rcs_splitlines (const char *); static void rcs_freefoo(struct rcs_foo *); #define RCS_TOKSTR(rfp) ((struct rcs_pdata *)rfp->rf_pdata)->rp_buf #define RCS_TOKLEN(rfp) ((struct rcs_pdata *)rfp->rf_pdata)->rp_blen static struct rcs_key { char rk_str[16]; int rk_id; int rk_val; int rk_flags; } rcs_keys[] = { { "access", RCS_TOK_ACCESS, RCS_TOK_ID, RCS_VOPT }, { "author", RCS_TOK_AUTHOR, RCS_TOK_STRING, 0 }, { "branch", RCS_TOK_BRANCH, RCS_TOK_NUM, RCS_VOPT }, { "branches", RCS_TOK_BRANCHES, RCS_TOK_NUM, RCS_VOPT }, { "comment", RCS_TOK_COMMENT, RCS_TOK_STRING, RCS_VOPT }, { "date", RCS_TOK_DATE, RCS_TOK_NUM, 0 }, { "desc", RCS_TOK_DESC, RCS_TOK_STRING, RCS_NOSCOL }, { "expand", RCS_TOK_EXPAND, RCS_TOK_STRING, RCS_VOPT }, { "head", RCS_TOK_HEAD, RCS_TOK_NUM, RCS_VOPT }, { "locks", RCS_TOK_LOCKS, RCS_TOK_ID, 0 }, { "log", RCS_TOK_LOG, RCS_TOK_STRING, RCS_NOSCOL }, { "next", RCS_TOK_NEXT, RCS_TOK_NUM, RCS_VOPT }, { "state", RCS_TOK_STATE, RCS_TOK_STRING, RCS_VOPT }, { "strict", RCS_TOK_STRICT, 0, 0, }, { "symbols", RCS_TOK_SYMBOLS, 0, 0 }, { "text", RCS_TOK_TEXT, RCS_TOK_STRING, RCS_NOSCOL }, }; /* * rcs_open() * * Open a file containing RCS-formatted information. The file's path is * given in , and the opening mode is given in , which is either * RCS_MODE_READ, RCS_MODE_WRITE, or RCS_MODE_RDWR. If the mode requests write * access and the file does not exist, it will be created. * The file isn't actually parsed by rcs_open(); parsing is delayed until the * first operation that requires information from the file. * Returns a handle to the opened file on success, or NULL on failure. */ RCSFILE* rcs_open(const char *path, u_int mode) { RCSFILE *rfp; struct stat st; if ((stat(path, &st) == -1) && (errno == ENOENT) && !(mode & RCS_MODE_WRITE)) { cvs_log(LP_ERRNO, "cannot open RCS file `%s'", path); return (NULL); } rfp = (RCSFILE *)malloc(sizeof(*rfp)); if (rfp == NULL) { cvs_log(LP_ERRNO, "failed to allocate RCS file structure"); return (NULL); } memset(rfp, 0, sizeof(*rfp)); rfp->rf_head = rcsnum_alloc(); if (rfp->rf_head == NULL) { free(rfp); return (NULL); } rfp->rf_path = strdup(path); if (rfp->rf_path == NULL) { cvs_log(LP_ERRNO, "failed to duplicate RCS file path"); rcs_close(rfp); return (NULL); } rcsnum_aton(RCS_HEAD_INIT, NULL, rfp->rf_head); rfp->rf_ref = 1; rfp->rf_flags |= RCS_RF_SLOCK; rfp->rf_mode = mode; TAILQ_INIT(&(rfp->rf_delta)); TAILQ_INIT(&(rfp->rf_symbols)); TAILQ_INIT(&(rfp->rf_locks)); if (rcs_parse(rfp) < 0) { rcs_close(rfp); return (NULL); } return (rfp); } /* * rcs_close() * * Close an RCS file handle. */ void rcs_close(RCSFILE *rfp) { struct rcs_delta *rdp; if (rfp->rf_ref > 1) { rfp->rf_ref--; return; } while (!TAILQ_EMPTY(&(rfp->rf_delta))) { rdp = TAILQ_FIRST(&(rfp->rf_delta)); TAILQ_REMOVE(&(rfp->rf_delta), rdp, rd_list); rcs_freedelta(rdp); } if (rfp->rf_head != NULL) rcsnum_free(rfp->rf_head); if (rfp->rf_path != NULL) free(rfp->rf_path); if (rfp->rf_comment != NULL) free(rfp->rf_comment); if (rfp->rf_expand != NULL) free(rfp->rf_expand); if (rfp->rf_desc != NULL) free(rfp->rf_desc); free(rfp); } /* * rcs_write() * * Write the contents of the RCS file handle to disk in the file whose * path is in . * Returns 0 on success, or -1 on failure. */ int rcs_write(RCSFILE *rfp) { FILE *fp; char buf[128], numbuf[64]; struct rcs_sym *symp; struct rcs_lock *lkp; struct rcs_delta *rdp; if (rfp->rf_flags & RCS_RF_SYNCED) return (0); fp = fopen(rfp->rf_path, "w"); if (fp == NULL) { cvs_log(LP_ERRNO, "failed to open RCS output file `%s'", rfp->rf_path); return (-1); } rcsnum_tostr(rfp->rf_head, numbuf, sizeof(numbuf)); fprintf(fp, "head\t%s;\n", numbuf); fprintf(fp, "access;\n"); fprintf(fp, "symbols\n"); TAILQ_FOREACH(symp, &(rfp->rf_symbols), rs_list) { rcsnum_tostr(symp->rs_num, numbuf, sizeof(numbuf)); snprintf(buf, sizeof(buf), "%s:%s", symp->rs_name, numbuf); fprintf(fp, "\t%s", buf); if (symp != TAILQ_LAST(&(rfp->rf_symbols), rcs_slist)) fputc('\n', fp); } fprintf(fp, ";\n"); fprintf(fp, "locks;"); if (rfp->rf_flags & RCS_RF_SLOCK) fprintf(fp, " strict;"); fputc('\n', fp); if (rfp->rf_comment != NULL) fprintf(fp, "comment\t@%s@;\n", rfp->rf_comment); if (rfp->rf_expand != NULL) fprintf(fp, "expand @ %s @;\n", rfp->rf_expand); fprintf(fp, "\n\n"); TAILQ_FOREACH(rdp, &(rfp->rf_delta), rd_list) { fprintf(fp, "%s\n", rcsnum_tostr(rdp->rd_num, numbuf, sizeof(numbuf))); fprintf(fp, "date\t%d.%02d.%02d.%02d.%02d.%02d;", rdp->rd_date.tm_year, rdp->rd_date.tm_mon + 1, rdp->rd_date.tm_mday, rdp->rd_date.tm_hour, rdp->rd_date.tm_min, rdp->rd_date.tm_sec); fprintf(fp, "\tauthor %s;\tstate %s;\n", rdp->rd_author, rdp->rd_state); fprintf(fp, "branches;\n"); fprintf(fp, "next\t%s;\n\n", rcsnum_tostr(rdp->rd_next, numbuf, sizeof(numbuf))); } fprintf(fp, "\ndesc\n@%s@\n\n", rfp->rf_desc); /* deltatexts */ TAILQ_FOREACH(rdp, &(rfp->rf_delta), rd_list) { fprintf(fp, "\n%s\n", rcsnum_tostr(rdp->rd_num, numbuf, sizeof(numbuf))); fprintf(fp, "log\n@%s@\n", rdp->rd_log); fprintf(fp, "text\n@%s@\n\n", rdp->rd_text); } fclose(fp); rfp->rf_flags |= RCS_RF_SYNCED; return (0); } /* * rcs_addsym() * * Add a symbol to the list of symbols for the RCS file . The new symbol * is named and is bound to the RCS revision . * Returns 0 on success, or -1 on failure. */ int rcs_addsym(RCSFILE *rfp, const char *sym, RCSNUM *snum) { struct rcs_sym *symp; /* first look for duplication */ TAILQ_FOREACH(symp, &(rfp->rf_symbols), rs_list) { if (strcmp(symp->rs_name, sym) == 0) { return (-1); } } symp = (struct rcs_sym *)malloc(sizeof(*symp)); if (symp == NULL) { cvs_log(LP_ERRNO, "failed to allocate RCS symbol"); return (-1); } symp->rs_name = strdup(sym); symp->rs_num = rcsnum_alloc(); rcsnum_cpy(snum, symp->rs_num, 0); TAILQ_INSERT_HEAD(&(rfp->rf_symbols), symp, rs_list); /* not synced anymore */ rfp->rf_flags &= ~RCS_RF_SYNCED; return (0); } /* * rcs_patch() * * Apply an RCS-format patch pointed to by to the file contents * found in . * Returns 0 on success, or -1 on failure. */ BUF* rcs_patch(const char *data, const char *patch) { struct rcs_foo *dlines, *plines; struct rcs_line *lp; size_t len; int lineno; BUF *res; len = strlen(data); res = cvs_buf_alloc(len, BUF_AUTOEXT); if (res == NULL) return (NULL); dlines = rcs_splitlines(data); if (dlines == NULL) return (NULL); plines = rcs_splitlines(patch); if (plines == NULL) { rcs_freefoo(dlines); return (NULL); } if (rcs_patch_lines(dlines, plines) < 0) { rcs_freefoo(plines); rcs_freefoo(dlines); return (NULL); } lineno = 0; TAILQ_FOREACH(lp, &dlines->rl_lines, rl_list) { if (lineno != 0) cvs_buf_fappend(res, "%s\n", lp->rl_line); lineno++; } rcs_freefoo(dlines); rcs_freefoo(plines); return (res); } int rcs_patch_lines(struct rcs_foo *dlines, struct rcs_foo *plines) { char op, *ep; struct rcs_line *lp, *dlp, *ndlp; FILE *fp; int i, lineno, nbln; dlp = TAILQ_FIRST(&(dlines->rl_lines)); lp = TAILQ_FIRST(&(plines->rl_lines)); /* skip first bogus line */ for (lp = TAILQ_NEXT(lp, rl_list); lp != NULL; lp = TAILQ_NEXT(lp, rl_list)) { op = *(lp->rl_line); lineno = (int)strtol((lp->rl_line + 1), &ep, 10); if ((lineno > dlines->rl_nblines) || (lineno <= 0) || (*ep != ' ')) { cvs_log(LP_ERR, "invalid line specification in RCS patch"); return (NULL); } ep++; nbln = (int)strtol(ep, &ep, 10); if ((nbln <= 0) || (*ep != '\0')) { cvs_log(LP_ERR, "invalid line number specification in RCS patch"); return (NULL); } /* find the appropriate line */ for (;;) { if (dlp == NULL) break; if (dlp->rl_lineno == lineno) break; if (dlp->rl_lineno > lineno) { dlp = TAILQ_PREV(dlp, rcs_tqh, rl_list); } else if (dlp->rl_lineno < lineno) { ndlp = TAILQ_NEXT(dlp, rl_list); if (ndlp->rl_lineno > lineno) break; dlp = ndlp; } } if (dlp == NULL) { cvs_log(LP_ERR, "can't find referenced line in RCS patch"); return (NULL); } if (op == 'd') { for (i = 0; (i < nbln) && (dlp != NULL); i++) { ndlp = TAILQ_NEXT(dlp, rl_list); TAILQ_REMOVE(&(dlines->rl_lines), dlp, rl_list); dlp = ndlp; } } else if (op == 'a') { for (i = 0; i < nbln; i++) { ndlp = lp; lp = TAILQ_NEXT(lp, rl_list); if (lp == NULL) { cvs_log(LP_ERR, "truncated RCS patch"); return (-1); } TAILQ_REMOVE(&(plines->rl_lines), lp, rl_list); TAILQ_INSERT_AFTER(&(dlines->rl_lines), dlp, lp, rl_list); dlp = lp; /* we don't want lookup to block on those */ lp->rl_lineno = lineno; lp = ndlp; } } else { cvs_log(LP_ERR, "unknown RCS patch operation `%c'", op); return (-1); } /* last line of the patch, done */ if (lp->rl_lineno == plines->rl_nblines) break; } /* once we're done patching, rebuild the line numbers */ lineno = 0; TAILQ_FOREACH(lp, &(dlines->rl_lines), rl_list) lp->rl_lineno = lineno++; dlines->rl_nblines = lineno - 1; return (0); } /* * rcs_getrev() * * Get the whole contents of revision from the RCSFILE . The * returned buffer is dynamically allocated and should be released using * cvs_buf_free() once the caller is done using it. */ BUF* rcs_getrev(RCSFILE *rfp, RCSNUM *rev) { int res; size_t len; void *bp; RCSNUM *crev; BUF *rbuf; struct rcs_delta *rdp = NULL; res = rcsnum_cmp(rfp->rf_head, rev, 0); if (res == 1) { cvs_log(LP_ERR, "sorry, can't travel in the future yet"); return (NULL); } else { rdp = rcs_findrev(rfp, rfp->rf_head); if (rdp == NULL) { cvs_log(LP_ERR, "failed to get RCS HEAD revision"); return (NULL); } len = strlen(rdp->rd_text); rbuf = cvs_buf_alloc(len, BUF_AUTOEXT); if (rbuf == NULL) return (NULL); cvs_buf_append(rbuf, rdp->rd_text, len); if (res != 0) { /* Apply patches backwards to get the right version. * This will need some rework to support sub branches. */ crev = rcsnum_alloc(); rcsnum_cpy(rfp->rf_head, crev, 0); do { crev->rn_id[crev->rn_len - 1]--; rdp = rcs_findrev(rfp, crev); if (rdp == NULL) return (NULL); cvs_buf_putc(rbuf, '\0'); bp = cvs_buf_release(rbuf); rbuf = rcs_patch((char *)bp, rdp->rd_text); if (rbuf == NULL) break; } while (rcsnum_cmp(crev, rev, 0) != 0); rcsnum_free(crev); } } return (rbuf); } /* * rcs_getrevbydate() * * Get an RCS revision by a specific date. */ RCSNUM* rcs_getrevbydate(RCSFILE *rfp, struct tm *date) { return (NULL); } /* * rcs_findrev() * * Find a specific revision's delta entry in the tree of the RCS file . * The revision number is given in . * Returns a pointer to the delta on success, or NULL on failure. */ static struct rcs_delta* rcs_findrev(RCSFILE *rfp, RCSNUM *rev) { u_int cmplen; struct rcs_delta *rdp; struct rcs_dlist *hp; int found; cmplen = 2; hp = &(rfp->rf_delta); do { found = 0; TAILQ_FOREACH(rdp, hp, rd_list) { if (rcsnum_cmp(rdp->rd_num, rev, cmplen) == 0) { if (cmplen == rev->rn_len) return (rdp); hp = &(rdp->rd_snodes); cmplen += 2; found = 1; break; } } } while (found && cmplen < rev->rn_len); return (NULL); } /* * rcs_parse() * * Parse the contents of file , which are in the RCS format. * Returns 0 on success, or -1 on failure. */ int rcs_parse(RCSFILE *rfp) { int ret; struct rcs_pdata *pdp; if (rfp->rf_flags & RCS_RF_PARSED) return (0); pdp = (struct rcs_pdata *)malloc(sizeof(*pdp)); if (pdp == NULL) { cvs_log(LP_ERRNO, "failed to allocate RCS parser data"); return (-1); } memset(pdp, 0, sizeof(*pdp)); pdp->rp_line = 1; pdp->rp_pttype = RCS_TOK_ERR; pdp->rp_file = fopen(rfp->rf_path, "r"); if (pdp->rp_file == NULL) { cvs_log(LP_ERRNO, "failed to open RCS file `%s'", rfp->rf_path); rcs_freepdata(pdp); return (-1); } pdp->rp_buf = (char *)malloc(RCS_BUFSIZE); if (pdp->rp_buf == NULL) { cvs_log(LP_ERRNO, "failed to allocate RCS parser buffer"); rcs_freepdata(pdp); return (-1); } pdp->rp_blen = RCS_BUFSIZE; /* ditch the strict lock */ rfp->rf_flags &= ~RCS_RF_SLOCK; rfp->rf_pdata = pdp; if (rcs_parse_admin(rfp) < 0) { rcs_freepdata(pdp); return (-1); } for (;;) { ret = rcs_parse_delta(rfp); if (ret == 0) break; else if (ret == -1) { rcs_freepdata(pdp); return (-1); } } ret = rcs_gettok(rfp); if (ret != RCS_TOK_DESC) { cvs_log(LP_ERR, "token `%s' found where RCS desc expected", RCS_TOKSTR(rfp)); rcs_freepdata(pdp); return (-1); } ret = rcs_gettok(rfp); if (ret != RCS_TOK_STRING) { cvs_log(LP_ERR, "token `%s' found where RCS desc expected", RCS_TOKSTR(rfp)); rcs_freepdata(pdp); return (-1); } rfp->rf_desc = strdup(RCS_TOKSTR(rfp)); for (;;) { ret = rcs_parse_deltatext(rfp); if (ret == 0) break; else if (ret == -1) { rcs_freepdata(pdp); return (-1); } } cvs_log(LP_DEBUG, "RCS file `%s' parsed OK (%u lines)", rfp->rf_path, pdp->rp_line); rcs_freepdata(pdp); rfp->rf_pdata = NULL; rfp->rf_flags |= RCS_RF_PARSED|RCS_RF_SYNCED; return (0); } /* * rcs_parse_admin() * * Parse the administrative portion of an RCS file. * Returns 0 on success, or -1 on failure. */ static int rcs_parse_admin(RCSFILE *rfp) { u_int i; int tok, ntok, hmask; struct rcs_key *rk; /* hmask is a mask of the headers already encountered */ hmask = 0; for (;;) { tok = rcs_gettok(rfp); if (tok == RCS_TOK_ERR) { cvs_log(LP_ERR, "parse error in RCS admin section"); return (-1); } else if (tok == RCS_TOK_NUM) { /* assume this is the start of the first delta */ rcs_pushtok(rfp, RCS_TOKSTR(rfp), tok); return (0); } rk = NULL; for (i = 0; i < sizeof(rcs_keys)/sizeof(rcs_keys[0]); i++) if (rcs_keys[i].rk_id == tok) rk = &(rcs_keys[i]); if (hmask & (1 << tok)) { cvs_log(LP_ERR, "duplicate RCS key"); return (-1); } hmask |= (1 << tok); switch (tok) { case RCS_TOK_HEAD: case RCS_TOK_BRANCH: case RCS_TOK_COMMENT: case RCS_TOK_EXPAND: ntok = rcs_gettok(rfp); if (ntok == RCS_TOK_SCOLON) break; if (ntok != rk->rk_val) { cvs_log(LP_ERR, "invalid value type for RCS key `%s'", rk->rk_str); } if (tok == RCS_TOK_HEAD) { rcsnum_aton(RCS_TOKSTR(rfp), NULL, rfp->rf_head); } else if (tok == RCS_TOK_BRANCH) { rcsnum_aton(RCS_TOKSTR(rfp), NULL, rfp->rf_branch); } else if (tok == RCS_TOK_COMMENT) { rfp->rf_comment = strdup(RCS_TOKSTR(rfp)); } else if (tok == RCS_TOK_EXPAND) { rfp->rf_expand = strdup(RCS_TOKSTR(rfp)); } /* now get the expected semi-colon */ ntok = rcs_gettok(rfp); if (ntok != RCS_TOK_SCOLON) { cvs_log(LP_ERR, "missing semi-colon after RCS `%s' key", rk->rk_str); return (-1); } break; case RCS_TOK_ACCESS: rcs_parse_access(rfp); break; case RCS_TOK_SYMBOLS: rcs_parse_symbols(rfp); break; case RCS_TOK_LOCKS: rcs_parse_locks(rfp); break; default: cvs_log(LP_ERR, "unexpected token `%s' in RCS admin section", RCS_TOKSTR(rfp)); return (-1); } } return (0); } /* * rcs_parse_delta() * * Parse an RCS delta section and allocate the structure to store that delta's * information in the delta list. * Returns 1 if the section was parsed OK, 0 if it is the last delta, and * -1 on error. */ static int rcs_parse_delta(RCSFILE *rfp) { int ret, tok, ntok, hmask; u_int i; char *tokstr; RCSNUM *datenum; struct rcs_delta *rdp; struct rcs_key *rk; rdp = (struct rcs_delta *)malloc(sizeof(*rdp)); if (rdp == NULL) { cvs_log(LP_ERRNO, "failed to allocate RCS delta structure"); return (-1); } memset(rdp, 0, sizeof(*rdp)); rdp->rd_num = rcsnum_alloc(); rdp->rd_next = rcsnum_alloc(); TAILQ_INIT(&(rdp->rd_branches)); tok = rcs_gettok(rfp); if (tok != RCS_TOK_NUM) { cvs_log(LP_ERR, "unexpected token `%s' at start of delta", RCS_TOKSTR(rfp)); rcs_freedelta(rdp); return (-1); } rcsnum_aton(RCS_TOKSTR(rfp), NULL, rdp->rd_num); hmask = 0; ret = 0; tokstr = NULL; for (;;) { tok = rcs_gettok(rfp); if (tok == RCS_TOK_ERR) { cvs_log(LP_ERR, "parse error in RCS delta section"); rcs_freedelta(rdp); return (-1); } else if (tok == RCS_TOK_NUM || tok == RCS_TOK_DESC) { rcs_pushtok(rfp, RCS_TOKSTR(rfp), tok); ret = (tok == RCS_TOK_NUM ? 1 : 0); break; } rk = NULL; for (i = 0; i < sizeof(rcs_keys)/sizeof(rcs_keys[0]); i++) if (rcs_keys[i].rk_id == tok) rk = &(rcs_keys[i]); if (hmask & (1 << tok)) { cvs_log(LP_ERR, "duplicate RCS key"); rcs_freedelta(rdp); return (-1); } hmask |= (1 << tok); switch (tok) { case RCS_TOK_DATE: case RCS_TOK_AUTHOR: case RCS_TOK_STATE: case RCS_TOK_NEXT: ntok = rcs_gettok(rfp); if (ntok == RCS_TOK_SCOLON) { if (rk->rk_flags & RCS_VOPT) break; else { cvs_log(LP_ERR, "missing mandatory " "value to RCS key `%s'", rk->rk_str); rcs_freedelta(rdp); return (-1); } } if (ntok != rk->rk_val) { cvs_log(LP_ERR, "invalid value type for RCS key `%s'", rk->rk_str); rcs_freedelta(rdp); return (-1); } if (tokstr != NULL) free(tokstr); tokstr = strdup(RCS_TOKSTR(rfp)); /* now get the expected semi-colon */ ntok = rcs_gettok(rfp); if (ntok != RCS_TOK_SCOLON) { cvs_log(LP_ERR, "missing semi-colon after RCS `%s' key", rk->rk_str); rcs_freedelta(rdp); return (-1); } if (tok == RCS_TOK_DATE) { datenum = rcsnum_alloc(); rcsnum_aton(tokstr, NULL, datenum); if (datenum->rn_len != 6) { cvs_log(LP_ERR, "RCS date specification has %s " "fields", (datenum->rn_len > 6) ? "too many" : "missing"); rcs_freedelta(rdp); } rdp->rd_date.tm_year = datenum->rn_id[0]; rdp->rd_date.tm_mon = datenum->rn_id[1] - 1; rdp->rd_date.tm_mday = datenum->rn_id[2]; rdp->rd_date.tm_hour = datenum->rn_id[3]; rdp->rd_date.tm_min = datenum->rn_id[4]; rdp->rd_date.tm_sec = datenum->rn_id[5]; rcsnum_free(datenum); } else if (tok == RCS_TOK_AUTHOR) { rdp->rd_author = tokstr; tokstr = NULL; } else if (tok == RCS_TOK_STATE) { rdp->rd_state = tokstr; tokstr = NULL; } else if (tok == RCS_TOK_NEXT) { rcsnum_aton(tokstr, NULL, rdp->rd_next); } break; case RCS_TOK_BRANCHES: rcs_parse_branches(rfp, rdp); break; default: cvs_log(LP_ERR, "unexpected token `%s' in RCS delta", RCS_TOKSTR(rfp)); rcs_freedelta(rdp); return (-1); } } TAILQ_INSERT_TAIL(&(rfp->rf_delta), rdp, rd_list); return (ret); } /* * rcs_parse_deltatext() * * Parse an RCS delta text section and fill in the log and text field of the * appropriate delta section. * Returns 1 if the section was parsed OK, 0 if it is the last delta, and * -1 on error. */ static int rcs_parse_deltatext(RCSFILE *rfp) { int tok; RCSNUM *tnum; struct rcs_delta *rdp; tnum = rcsnum_alloc(); if (tnum == NULL) return (-1); tok = rcs_gettok(rfp); if (tok == RCS_TOK_EOF) return (0); if (tok != RCS_TOK_NUM) { cvs_log(LP_ERR, "unexpected token `%s' at start of RCS delta text", RCS_TOKSTR(rfp)); return (-1); } rcsnum_aton(RCS_TOKSTR(rfp), NULL, tnum); TAILQ_FOREACH(rdp, &(rfp->rf_delta), rd_list) { if (rcsnum_cmp(tnum, rdp->rd_num, 0) == 0) break; } if (rdp == NULL) { cvs_log(LP_ERR, "RCS delta text `%s' has no matching delta", RCS_TOKSTR(rfp)); return (-1); } tok = rcs_gettok(rfp); if (tok != RCS_TOK_LOG) { cvs_log(LP_ERR, "unexpected token `%s' where RCS log expected", RCS_TOKSTR(rfp)); return (-1); } tok = rcs_gettok(rfp); if (tok != RCS_TOK_STRING) { cvs_log(LP_ERR, "unexpected token `%s' where RCS log expected", RCS_TOKSTR(rfp)); return (-1); } rdp->rd_log = strdup(RCS_TOKSTR(rfp)); if (rdp->rd_log == NULL) { cvs_log(LP_ERRNO, "failed to copy RCS deltatext log"); return (-1); } tok = rcs_gettok(rfp); if (tok != RCS_TOK_TEXT) { cvs_log(LP_ERR, "unexpected token `%s' where RCS text expected", RCS_TOKSTR(rfp)); return (-1); } tok = rcs_gettok(rfp); if (tok != RCS_TOK_STRING) { cvs_log(LP_ERR, "unexpected token `%s' where RCS text expected", RCS_TOKSTR(rfp)); return (-1); } rdp->rd_text = strdup(RCS_TOKSTR(rfp)); if (rdp->rd_text == NULL) { cvs_log(LP_ERRNO, "failed to copy RCS delta text"); return (-1); } return (1); } /* * rcs_parse_access() * * Parse the access list given as value to the `access' keyword. * Returns 0 on success, or -1 on failure. */ static int rcs_parse_access(RCSFILE *rfp) { int type; while ((type = rcs_gettok(rfp)) != RCS_TOK_SCOLON) { if (type != RCS_TOK_ID) { cvs_log(LP_ERR, "unexpected token `%s' in access list", RCS_TOKSTR(rfp)); return (-1); } } return (0); } /* * rcs_parse_symbols() * * Parse the symbol list given as value to the `symbols' keyword. * Returns 0 on success, or -1 on failure. */ static int rcs_parse_symbols(RCSFILE *rfp) { int type; struct rcs_sym *symp; for (;;) { type = rcs_gettok(rfp); if (type == RCS_TOK_SCOLON) break; if (type != RCS_TOK_STRING) { cvs_log(LP_ERR, "unexpected token `%s' in symbol list", RCS_TOKSTR(rfp)); return (-1); } symp = (struct rcs_sym *)malloc(sizeof(*symp)); if (symp == NULL) { cvs_log(LP_ERRNO, "failed to allocate RCS symbol"); return (-1); } symp->rs_name = strdup(RCS_TOKSTR(rfp)); symp->rs_num = rcsnum_alloc(); type = rcs_gettok(rfp); if (type != RCS_TOK_COLON) { cvs_log(LP_ERR, "unexpected token `%s' in symbol list", RCS_TOKSTR(rfp)); free(symp->rs_name); free(symp); return (-1); } type = rcs_gettok(rfp); if (type != RCS_TOK_NUM) { cvs_log(LP_ERR, "unexpected token `%s' in symbol list", RCS_TOKSTR(rfp)); free(symp->rs_name); free(symp); return (-1); } if (rcsnum_aton(RCS_TOKSTR(rfp), NULL, symp->rs_num) < 0) { cvs_log(LP_ERR, "failed to parse RCS NUM `%s'", RCS_TOKSTR(rfp)); free(symp->rs_name); free(symp); return (-1); } TAILQ_INSERT_HEAD(&(rfp->rf_symbols), symp, rs_list); } return (0); } /* * rcs_parse_locks() * * Parse the lock list given as value to the `locks' keyword. * Returns 0 on success, or -1 on failure. */ static int rcs_parse_locks(RCSFILE *rfp) { int type; struct rcs_lock *lkp; for (;;) { type = rcs_gettok(rfp); if (type == RCS_TOK_SCOLON) break; if (type != RCS_TOK_ID) { cvs_log(LP_ERR, "unexpected token `%s' in lock list", RCS_TOKSTR(rfp)); return (-1); } lkp = (struct rcs_lock *)malloc(sizeof(*lkp)); if (lkp == NULL) { cvs_log(LP_ERRNO, "failed to allocate RCS lock"); return (-1); } lkp->rl_num = rcsnum_alloc(); type = rcs_gettok(rfp); if (type != RCS_TOK_COLON) { cvs_log(LP_ERR, "unexpected token `%s' in symbol list", RCS_TOKSTR(rfp)); free(lkp); return (-1); } type = rcs_gettok(rfp); if (type != RCS_TOK_NUM) { cvs_log(LP_ERR, "unexpected token `%s' in symbol list", RCS_TOKSTR(rfp)); free(lkp); return (-1); } if (rcsnum_aton(RCS_TOKSTR(rfp), NULL, lkp->rl_num) < 0) { cvs_log(LP_ERR, "failed to parse RCS NUM `%s'", RCS_TOKSTR(rfp)); free(lkp); return (-1); } TAILQ_INSERT_HEAD(&(rfp->rf_locks), lkp, rl_list); } /* check if we have a `strict' */ type = rcs_gettok(rfp); if (type != RCS_TOK_STRICT) { rcs_pushtok(rfp, RCS_TOKSTR(rfp), type); } else { rfp->rf_flags |= RCS_RF_SLOCK; type = rcs_gettok(rfp); if (type != RCS_TOK_SCOLON) { cvs_log(LP_ERR, "missing semi-colon after `strict' keyword"); return (-1); } } return (0); } /* * rcs_parse_branches() * * Parse the list of branches following a `branches' keyword in a delta. * Returns 0 on success, or -1 on failure. */ static int rcs_parse_branches(RCSFILE *rfp, struct rcs_delta *rdp) { int type; struct rcs_branch *brp; for (;;) { type = rcs_gettok(rfp); if (type == RCS_TOK_SCOLON) break; if (type != RCS_TOK_NUM) { cvs_log(LP_ERR, "unexpected token `%s' in list of branches", RCS_TOKSTR(rfp)); return (-1); } brp = (struct rcs_branch *)malloc(sizeof(*brp)); if (brp == NULL) { cvs_log(LP_ERRNO, "failed to allocate RCS branch"); return (-1); } brp->rb_num = rcsnum_alloc(); rcsnum_aton(RCS_TOKSTR(rfp), NULL, brp->rb_num); TAILQ_INSERT_TAIL(&(rdp->rd_branches), brp, rb_list); } return (0); } /* * rcs_freedelta() * * Free the contents of a delta structure. */ void rcs_freedelta(struct rcs_delta *rdp) { struct rcs_delta *crdp; if (rdp->rd_author != NULL) free(rdp->rd_author); if (rdp->rd_state != NULL) free(rdp->rd_state); if (rdp->rd_log != NULL) free(rdp->rd_log); if (rdp->rd_text != NULL) free(rdp->rd_text); while ((crdp = TAILQ_FIRST(&(rdp->rd_snodes))) != NULL) { TAILQ_REMOVE(&(rdp->rd_snodes), crdp, rd_list); rcs_freedelta(crdp); } free(rdp); } /* * rcs_freepdata() * * Free the contents of the parser data structure. */ static void rcs_freepdata(struct rcs_pdata *pd) { if (pd->rp_file != NULL) (void)fclose(pd->rp_file); if (pd->rp_buf != NULL) free(pd->rp_buf); free(pd); } /* * rcs_gettok() * * Get the next RCS token from the string . */ static int rcs_gettok(RCSFILE *rfp) { u_int i; int ch, last, type; char *bp, *bep; struct rcs_pdata *pdp = (struct rcs_pdata *)rfp->rf_pdata; type = RCS_TOK_ERR; bp = pdp->rp_buf; bep = pdp->rp_buf + pdp->rp_blen - 1; *bp = '\0'; if (pdp->rp_pttype != RCS_TOK_ERR) { type = pdp->rp_pttype; strlcpy(pdp->rp_buf, pdp->rp_ptok, pdp->rp_blen); pdp->rp_pttype = RCS_TOK_ERR; return (type); } /* skip leading whitespace */ /* XXX we must skip backspace too for compatibility, should we? */ do { ch = getc(pdp->rp_file); if (ch == '\n') pdp->rp_line++; } while (isspace(ch)); if (ch == EOF) { type = RCS_TOK_EOF; } else if (ch == ';') { type = RCS_TOK_SCOLON; } else if (ch == ':') { type = RCS_TOK_COLON; } else if (isalpha(ch)) { *(bp++) = ch; while (bp <= bep - 1) { ch = getc(pdp->rp_file); if (!isalnum(ch)) { ungetc(ch, pdp->rp_file); break; } *(bp++) = ch; } *bp = '\0'; for (i = 0; i < sizeof(rcs_keys)/sizeof(rcs_keys[0]); i++) { if (strcmp(rcs_keys[i].rk_str, pdp->rp_buf) == 0) { type = rcs_keys[i].rk_id; break; } } /* not a keyword, assume it's just a string */ if (type == RCS_TOK_ERR) type = RCS_TOK_STRING; } else if (ch == '@') { /* we have a string */ for (;;) { ch = getc(pdp->rp_file); if (ch == '@') { ch = getc(pdp->rp_file); if (ch != '@') { ungetc(ch, pdp->rp_file); break; } } else if (ch == '\n') pdp->rp_line++; *(bp++) = ch; if (bp == bep) break; } *bp = '\0'; type = RCS_TOK_STRING; } else if (isdigit(ch)) { *(bp++) = ch; last = ch; type = RCS_TOK_NUM; for (;;) { ch = getc(pdp->rp_file); if (bp == bep) break; if (!isdigit(ch) && ch != '.') { ungetc(ch, pdp->rp_file); break; } if (last == '.' && ch == '.') { type = RCS_TOK_ERR; break; } last = ch; *(bp++) = ch; } *(bp) = '\0'; } return (type); } /* * rcs_pushtok() * * Push a token back in the parser's token buffer. */ static int rcs_pushtok(RCSFILE *rfp, const char *tok, int type) { struct rcs_pdata *pdp = (struct rcs_pdata *)rfp->rf_pdata; if (pdp->rp_pttype != RCS_TOK_ERR) return (-1); pdp->rp_pttype = type; strlcpy(pdp->rp_ptok, tok, sizeof(pdp->rp_ptok)); return (0); } /* * rcs_stresc() * * Performs either escaping or unescaping of the string stored in . * The operation is to escape special RCS characters if the argument * is 1, or unescape otherwise. The result is stored in the destination * buffer, and must originally point to the size of . * Returns the number of bytes which have been read from the source and * operated on. The parameter will contain the number of bytes * actually copied in . */ size_t rcs_stresc(int esc, const char *str, char *buf, size_t *blen) { size_t rlen; const char *sp; char *bp, *bep; if (!esc) printf("unescaping `%s'\n", str); rlen = 0; bp = buf; bep = buf + *blen - 1; for (sp = str; (*sp != '\0') && (bp <= (bep - 1)); sp++) { if (*sp == '@') { if (esc) { if (bp > (bep - 2)) break; *(bp++) = '@'; } else { sp++; if (*sp != '@') { cvs_log(LP_WARN, "unknown escape character `%c' in " "RCS file", *sp); if (*sp == '\0') break; } } } *(bp++) = *sp; } *bp = '\0'; *blen = (bp - buf); return (sp - str); } /* * rcs_splitlines() * * Split the contents of a file into a list of lines. */ static struct rcs_foo* rcs_splitlines(const char *fcont) { char *dcp; struct rcs_foo *foo; struct rcs_line *lp; foo = (struct rcs_foo *)malloc(sizeof(*foo)); if (foo == NULL) { cvs_log(LP_ERR, "failed to allocate line structure"); return (NULL); } TAILQ_INIT(&(foo->rl_lines)); foo->rl_nblines = 0; foo->rl_data = strdup(fcont); if (foo->rl_data == NULL) { cvs_log(LP_ERRNO, "failed to copy file contents"); free(foo); return (NULL); } /* * Add a first bogus line with line number 0. This is used so we * can position the line pointer before 1 when changing the first line * in rcs_patch(). */ lp = (struct rcs_line *)malloc(sizeof(*lp)); if (lp == NULL) return (NULL); lp->rl_line = NULL; lp->rl_lineno = 0; TAILQ_INSERT_TAIL(&(foo->rl_lines), lp, rl_list); for (dcp = foo->rl_data; *dcp != '\0';) { lp = (struct rcs_line *)malloc(sizeof(*lp)); if (lp == NULL) { cvs_log(LP_ERR, "failed to allocate line entry"); return (NULL); } lp->rl_line = dcp; lp->rl_lineno = ++(foo->rl_nblines); TAILQ_INSERT_TAIL(&(foo->rl_lines), lp, rl_list); dcp = strchr(dcp, '\n'); if (dcp == NULL) { break; } *(dcp++) = '\0'; } return (foo); } static void rcs_freefoo(struct rcs_foo *fp) { struct rcs_line *lp; while ((lp = TAILQ_FIRST(&fp->rl_lines)) != NULL) { TAILQ_REMOVE(&fp->rl_lines, lp, rl_list); free(lp); } free(fp->rl_data); free(fp); }