Annotation of src/usr.bin/cvs/hist.c, Revision 1.13
1.13 ! xsa 1: /* $OpenBSD: hist.c,v 1.12 2005/12/10 20:27:45 joris Exp $ */
1.1 jfb 2: /*
3: * Copyright (c) 2004 Jean-Francois Brousseau <jfb@openbsd.org>
1.3 tedu 4: * All rights reserved.
1.1 jfb 5: *
1.3 tedu 6: * Redistribution and use in source and binary forms, with or without
7: * modification, are permitted provided that the following conditions
8: * are met:
1.1 jfb 9: *
1.3 tedu 10: * 1. Redistributions of source code must retain the above copyright
11: * notice, this list of conditions and the following disclaimer.
1.1 jfb 12: * 2. The name of the author may not be used to endorse or promote products
1.3 tedu 13: * derived from this software without specific prior written permission.
1.1 jfb 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
1.3 tedu 24: * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
1.1 jfb 25: */
26:
1.13 ! xsa 27: #include "includes.h"
1.1 jfb 28:
1.5 xsa 29: #include "cvs.h"
1.1 jfb 30: #include "log.h"
31:
1.7 xsa 32: #define CVS_HIST_BUFSIZE 8192
1.1 jfb 33:
34:
35:
1.7 xsa 36: static int cvs_hist_fillbuf(CVSHIST *);
37: static int cvs_hist_fmt(const struct cvs_hent *, char *, size_t);
1.1 jfb 38:
39:
40: /*
41: * cvs_hist_open()
42: *
43: * Open a CVS history file.
44: * Returns the number of entries in the file on success, or -1 on error.
45: */
1.8 xsa 46: CVSHIST *
1.1 jfb 47: cvs_hist_open(const char *path)
48: {
49: CVSHIST *histp;
50:
1.12 joris 51: histp = (CVSHIST *)xmalloc(sizeof(*histp));
1.1 jfb 52: memset(histp, 0, sizeof(*histp));
53:
1.12 joris 54: histp->chf_buf = (char *)xmalloc((size_t)CVS_HIST_BUFSIZE);
1.1 jfb 55: histp->chf_blen = CVS_HIST_BUFSIZE;
56: histp->chf_off = 0;
57:
58: histp->chf_sindex = 0;
59: histp->chf_cindex = 0;
60: histp->chf_nbhent = 0;
1.11 xsa 61:
62: cvs_log(LP_TRACE, "cvs_hist_open(%s)", path);
1.1 jfb 63:
64: histp->chf_fd = open(path, O_RDONLY, 0);
65: if (histp->chf_fd == -1) {
66: cvs_log(LP_ERRNO,
67: "failed to open CVS history file `%s'", path);
1.9 xsa 68: cvs_nolog = 1;
1.12 joris 69: xfree(histp->chf_buf);
70: xfree(histp);
1.1 jfb 71: return (NULL);
72: }
73:
74: cvs_hist_fillbuf(histp);
75:
76: return (histp);
77: }
78:
79:
80: /*
81: * cvs_hist_close()
82: *
83: * Close the CVS history file previously opened by a call to cvs_hist_open()
84: */
85: void
86: cvs_hist_close(CVSHIST *histp)
87: {
88: if (histp->chf_fd >= 0)
89: (void)close(histp->chf_fd);
1.12 joris 90: xfree(histp->chf_buf);
91: xfree(histp);
1.1 jfb 92: }
93:
94:
95: /*
96: * cvs_hist_getnext()
97: *
98: * Get the next entry from the history file <histp>. Whenever using this
99: * function, it should be assumed that the return value of the previous call
100: * to cvs_hist_getnext() is now invalid.
101: * Returns the next entry from the file on success, or NULL on failure or if
102: * no entries are left.
103: */
1.8 xsa 104: struct cvs_hent *
1.1 jfb 105: cvs_hist_getnext(CVSHIST *histp)
106: {
107: if (histp->chf_cindex == histp->chf_nbhent) {
108: /* no more cached entries, refill buf and parse */
109: cvs_hist_fillbuf(histp);
110: cvs_hist_parse(histp);
111: }
112: return (&(histp->chf_hent[histp->chf_cindex++]));
113: }
114:
115:
116: /*
117: * cvs_hist_append()
118: *
119: * Append a history entry to the history file <histp>. The file offset is
120: * first set to the end of the file.
121: * Returns 0 on success, or -1 on failure.
122: */
123: int
124: cvs_hist_append(CVSHIST *histp, struct cvs_hent *hentp)
125: {
126: char hbuf[128];
1.9 xsa 127:
128: if (cvs_nolog == 1)
129: return (0);
1.1 jfb 130:
131: if (cvs_hist_fmt(hentp, hbuf, sizeof(hbuf)) < 0) {
132: cvs_log(LP_ERR, "failed to append CVS history entry");
133: return (-1);
134: }
135:
136: /* position ourself at the end */
137: if (lseek(histp->chf_fd, (off_t)0, SEEK_END) == -1) {
138: cvs_log(LP_ERRNO, "failed to seek to end of CVS history file");
139: return (-1);
140: }
141:
142: if (write(histp->chf_fd, hbuf, strlen(hbuf)) == -1) {
143: cvs_log(LP_ERR, "failed to write CVS history entry to file");
144: return (-1);
145: }
146:
147: return (0);
148: }
149:
150:
151:
152: /*
153: * cvs_hist_fillbuf()
154: *
155: * Fill the history file's internal buffer for future parsing.
156: */
157: static int
158: cvs_hist_fillbuf(CVSHIST *histp)
159: {
160: ssize_t ret;
161:
162: /* reposition ourself in case we're missing the start of a record */
163: if (lseek(histp->chf_fd, histp->chf_off, SEEK_SET) == -1) {
164: cvs_log(LP_ERRNO, "failed to seek in CVS history file");
165: return (-1);
166: }
167: ret = read(histp->chf_fd, histp->chf_buf, histp->chf_blen);
168: if (ret == -1) {
169: cvs_log(LP_ERRNO, "failed to buffer CVS history file");
170: return (-1);
1.2 deraadt 171: } else {
1.1 jfb 172: histp->chf_bused = (size_t)ret;
173: }
174:
175: return (ret);
176: }
177:
178:
179: /*
180: * cvs_hist_parse()
181: *
182: * Parse the current contents of the internal buffer of <histp> and regenerate
183: * the buffered history entries.
184: * Returns the number of entries parsed on success, or -1 on failure.
185: */
186: int
187: cvs_hist_parse(CVSHIST *histp)
188: {
189: u_int i, fld;
190: char *fields[CVS_HIST_NBFLD], *sp, *bep, *ep, *errp;
191:
192: sp = histp->chf_buf;
193: bep = histp->chf_buf + histp->chf_bused - 1;
194:
195: for (i = 0; i < CVS_HIST_CACHE; i++) {
196: ep = memchr(sp, '\n', bep - sp);
197: if (ep == NULL) {
198: /*
199: * No record or incomplete record left to parse,
200: * so adjust the next read offset in consequence.
201: */
202: histp->chf_off += (off_t)(sp - histp->chf_buf);
203: break;
1.2 deraadt 204: } else if (ep == bep) {
1.1 jfb 205: histp->chf_off += (off_t)histp->chf_bused;
206: }
207: *(ep++) = '\0';
208:
209: printf("hist(%s)\n", sp);
210:
211: histp->chf_hent[i].ch_event = *sp++;
212:
213: /* split the record in fields */
214: fields[0] = sp;
215:
216: fld = 1;
217: while (sp < ep) {
218: if (*sp == '|') {
219: *sp = '\0';
220: fields[fld++] = sp + 1;
221: }
222: if (fld == CVS_HIST_NBFLD)
223: break;
224: sp++;
225: }
226: #if 0
227: for (fld = 0; fld < CVS_HIST_NBFLD; fld++)
228: printf("fields[%u] = `%s'\n", fld, fields[fld]);
229: #endif
230:
231: histp->chf_hent[i].ch_date = (time_t)strtol(fields[0],
232: &errp, 16);
233: if (*errp != '\0') {
234: cvs_log(LP_ERR,
235: "parse error in date field of CVS history entry");
236: continue;
237: }
238:
239: histp->chf_hent[i].ch_user = fields[1];
240: histp->chf_hent[i].ch_curdir = fields[2];
241: histp->chf_hent[i].ch_repo = fields[3];
242: histp->chf_hent[i].ch_rev = rcsnum_alloc();
243: rcsnum_aton(fields[4], NULL, histp->chf_hent[i].ch_rev);
244: histp->chf_hent[i].ch_arg = fields[5];
245: sp = ep;
246: }
247:
248: /* update indexes */
249: histp->chf_sindex += histp->chf_nbhent;
250: histp->chf_nbhent = i;
251: histp->chf_cindex = 0;
252:
253:
254: return (i);
255: }
256:
257:
258: /*
259: * cvs_hist_fmt()
260: *
261: * Format the contents of the CVS history entry <ent> into the format used in
262: * the CVS `history' file, and store the resulting string in <buf>, which is
263: * of size <blen>.
264: */
265: static int
266: cvs_hist_fmt(const struct cvs_hent *ent, char *buf, size_t blen)
267: {
268: char numbuf[64];
1.4 joris 269: int len;
1.1 jfb 270:
1.3 tedu 271: if (rcsnum_tostr(ent->ch_rev, numbuf, sizeof(numbuf)) == NULL)
1.1 jfb 272: return (-1);
273:
1.4 joris 274: len = snprintf(buf, blen, "%c%8x|%s|%s|%s|%s|%s",
1.1 jfb 275: ent->ch_event, ent->ch_date, ent->ch_user, ent->ch_curdir,
1.4 joris 276: ent->ch_repo, numbuf, ent->ch_arg);
277: if (len >= (int)blen || len == -1)
278: return (-1);
279: return (len);
1.1 jfb 280: }
![[BACK]](/icons/back.gif){kind=icon}
Return to hist.c CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [local] / src / usr.bin / cvs