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Commit | Line | Data |
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812666c8 | 1 | #include "cache.h" |
a2fab531 | 2 | #include "refs.h" |
d1df5743 | 3 | |
698a68be JH |
4 | int prefixcmp(const char *str, const char *prefix) |
5 | { | |
6 | for (; ; str++, prefix++) | |
7 | if (!*prefix) | |
8 | return 0; | |
9 | else if (*str != *prefix) | |
10 | return (unsigned char)*prefix - (unsigned char)*str; | |
11 | } | |
12 | ||
8cc5b290 AP |
13 | int suffixcmp(const char *str, const char *suffix) |
14 | { | |
15 | int len = strlen(str), suflen = strlen(suffix); | |
16 | if (len < suflen) | |
17 | return -1; | |
18 | else | |
19 | return strcmp(str + len - suflen, suffix); | |
20 | } | |
21 | ||
b315c5c0 PH |
22 | /* |
23 | * Used as the default ->buf value, so that people can always assume | |
24 | * buf is non NULL and ->buf is NUL terminated even for a freshly | |
25 | * initialized strbuf. | |
26 | */ | |
27 | char strbuf_slopbuf[1]; | |
28 | ||
917c9a71 PH |
29 | void strbuf_init(struct strbuf *sb, size_t hint) |
30 | { | |
b315c5c0 PH |
31 | sb->alloc = sb->len = 0; |
32 | sb->buf = strbuf_slopbuf; | |
f1696ee3 PH |
33 | if (hint) |
34 | strbuf_grow(sb, hint); | |
d1df5743 JH |
35 | } |
36 | ||
917c9a71 PH |
37 | void strbuf_release(struct strbuf *sb) |
38 | { | |
b315c5c0 PH |
39 | if (sb->alloc) { |
40 | free(sb->buf); | |
41 | strbuf_init(sb, 0); | |
42 | } | |
b449f4cf PH |
43 | } |
44 | ||
b315c5c0 | 45 | char *strbuf_detach(struct strbuf *sb, size_t *sz) |
917c9a71 | 46 | { |
b315c5c0 PH |
47 | char *res = sb->alloc ? sb->buf : NULL; |
48 | if (sz) | |
49 | *sz = sb->len; | |
f1696ee3 | 50 | strbuf_init(sb, 0); |
b449f4cf PH |
51 | return res; |
52 | } | |
53 | ||
917c9a71 PH |
54 | void strbuf_attach(struct strbuf *sb, void *buf, size_t len, size_t alloc) |
55 | { | |
56 | strbuf_release(sb); | |
57 | sb->buf = buf; | |
58 | sb->len = len; | |
59 | sb->alloc = alloc; | |
60 | strbuf_grow(sb, 0); | |
61 | sb->buf[sb->len] = '\0'; | |
62 | } | |
63 | ||
64 | void strbuf_grow(struct strbuf *sb, size_t extra) | |
65 | { | |
1368f650 JN |
66 | if (unsigned_add_overflows(extra, 1) || |
67 | unsigned_add_overflows(sb->len, extra + 1)) | |
b449f4cf | 68 | die("you want to use way too much memory"); |
b315c5c0 PH |
69 | if (!sb->alloc) |
70 | sb->buf = NULL; | |
b449f4cf PH |
71 | ALLOC_GROW(sb->buf, sb->len + extra + 1, sb->alloc); |
72 | } | |
73 | ||
eacd6dc5 LS |
74 | void strbuf_trim(struct strbuf *sb) |
75 | { | |
76 | char *b = sb->buf; | |
77 | while (sb->len > 0 && isspace((unsigned char)sb->buf[sb->len - 1])) | |
78 | sb->len--; | |
79 | while (sb->len > 0 && isspace(*b)) { | |
80 | b++; | |
81 | sb->len--; | |
82 | } | |
83 | memmove(sb->buf, b, sb->len); | |
84 | sb->buf[sb->len] = '\0'; | |
85 | } | |
f1696ee3 PH |
86 | void strbuf_rtrim(struct strbuf *sb) |
87 | { | |
88 | while (sb->len > 0 && isspace((unsigned char)sb->buf[sb->len - 1])) | |
89 | sb->len--; | |
90 | sb->buf[sb->len] = '\0'; | |
91 | } | |
92 | ||
eacd6dc5 LS |
93 | void strbuf_ltrim(struct strbuf *sb) |
94 | { | |
95 | char *b = sb->buf; | |
96 | while (sb->len > 0 && isspace(*b)) { | |
97 | b++; | |
98 | sb->len--; | |
99 | } | |
100 | memmove(sb->buf, b, sb->len); | |
101 | sb->buf[sb->len] = '\0'; | |
102 | } | |
103 | ||
eacd6dc5 LS |
104 | struct strbuf **strbuf_split(const struct strbuf *sb, int delim) |
105 | { | |
106 | int alloc = 2, pos = 0; | |
107 | char *n, *p; | |
108 | struct strbuf **ret; | |
109 | struct strbuf *t; | |
110 | ||
111 | ret = xcalloc(alloc, sizeof(struct strbuf *)); | |
112 | p = n = sb->buf; | |
113 | while (n < sb->buf + sb->len) { | |
114 | int len; | |
115 | n = memchr(n, delim, sb->len - (n - sb->buf)); | |
116 | if (pos + 1 >= alloc) { | |
117 | alloc = alloc * 2; | |
118 | ret = xrealloc(ret, sizeof(struct strbuf *) * alloc); | |
119 | } | |
120 | if (!n) | |
121 | n = sb->buf + sb->len - 1; | |
122 | len = n - p + 1; | |
123 | t = xmalloc(sizeof(struct strbuf)); | |
124 | strbuf_init(t, len); | |
125 | strbuf_add(t, p, len); | |
126 | ret[pos] = t; | |
127 | ret[++pos] = NULL; | |
128 | p = ++n; | |
129 | } | |
130 | return ret; | |
131 | } | |
132 | ||
133 | void strbuf_list_free(struct strbuf **sbs) | |
134 | { | |
135 | struct strbuf **s = sbs; | |
136 | ||
137 | while (*s) { | |
138 | strbuf_release(*s); | |
139 | free(*s++); | |
140 | } | |
141 | free(sbs); | |
142 | } | |
143 | ||
9b200fd6 | 144 | int strbuf_cmp(const struct strbuf *a, const struct strbuf *b) |
45f66f64 | 145 | { |
8f024655 AR |
146 | int len = a->len < b->len ? a->len: b->len; |
147 | int cmp = memcmp(a->buf, b->buf, len); | |
148 | if (cmp) | |
149 | return cmp; | |
150 | return a->len < b->len ? -1: a->len != b->len; | |
45f66f64 PH |
151 | } |
152 | ||
917c9a71 PH |
153 | void strbuf_splice(struct strbuf *sb, size_t pos, size_t len, |
154 | const void *data, size_t dlen) | |
155 | { | |
1368f650 | 156 | if (unsigned_add_overflows(pos, len)) |
917c9a71 PH |
157 | die("you want to use way too much memory"); |
158 | if (pos > sb->len) | |
159 | die("`pos' is too far after the end of the buffer"); | |
160 | if (pos + len > sb->len) | |
161 | die("`pos + len' is too far after the end of the buffer"); | |
162 | ||
163 | if (dlen >= len) | |
164 | strbuf_grow(sb, dlen - len); | |
165 | memmove(sb->buf + pos + dlen, | |
166 | sb->buf + pos + len, | |
167 | sb->len - pos - len); | |
168 | memcpy(sb->buf + pos, data, dlen); | |
169 | strbuf_setlen(sb, sb->len + dlen - len); | |
170 | } | |
171 | ||
c76689df PH |
172 | void strbuf_insert(struct strbuf *sb, size_t pos, const void *data, size_t len) |
173 | { | |
174 | strbuf_splice(sb, pos, 0, data, len); | |
175 | } | |
176 | ||
177 | void strbuf_remove(struct strbuf *sb, size_t pos, size_t len) | |
178 | { | |
179 | strbuf_splice(sb, pos, len, NULL, 0); | |
180 | } | |
181 | ||
917c9a71 PH |
182 | void strbuf_add(struct strbuf *sb, const void *data, size_t len) |
183 | { | |
b449f4cf PH |
184 | strbuf_grow(sb, len); |
185 | memcpy(sb->buf + sb->len, data, len); | |
186 | strbuf_setlen(sb, sb->len + len); | |
187 | } | |
188 | ||
91db267e RS |
189 | void strbuf_adddup(struct strbuf *sb, size_t pos, size_t len) |
190 | { | |
191 | strbuf_grow(sb, len); | |
192 | memcpy(sb->buf + sb->len, sb->buf + pos, len); | |
193 | strbuf_setlen(sb, sb->len + len); | |
194 | } | |
195 | ||
917c9a71 PH |
196 | void strbuf_addf(struct strbuf *sb, const char *fmt, ...) |
197 | { | |
b449f4cf PH |
198 | int len; |
199 | va_list ap; | |
200 | ||
f141bd80 SP |
201 | if (!strbuf_avail(sb)) |
202 | strbuf_grow(sb, 64); | |
b449f4cf PH |
203 | va_start(ap, fmt); |
204 | len = vsnprintf(sb->buf + sb->len, sb->alloc - sb->len, fmt, ap); | |
205 | va_end(ap); | |
f141bd80 SP |
206 | if (len < 0) |
207 | die("your vsnprintf is broken"); | |
f1696ee3 | 208 | if (len > strbuf_avail(sb)) { |
b449f4cf PH |
209 | strbuf_grow(sb, len); |
210 | va_start(ap, fmt); | |
211 | len = vsnprintf(sb->buf + sb->len, sb->alloc - sb->len, fmt, ap); | |
212 | va_end(ap); | |
f1696ee3 | 213 | if (len > strbuf_avail(sb)) { |
b449f4cf PH |
214 | die("this should not happen, your snprintf is broken"); |
215 | } | |
216 | } | |
217 | strbuf_setlen(sb, sb->len + len); | |
d1df5743 JH |
218 | } |
219 | ||
c3a670de MC |
220 | void strbuf_expand(struct strbuf *sb, const char *format, expand_fn_t fn, |
221 | void *context) | |
cde75e59 RS |
222 | { |
223 | for (;;) { | |
c3a670de MC |
224 | const char *percent; |
225 | size_t consumed; | |
cde75e59 RS |
226 | |
227 | percent = strchrnul(format, '%'); | |
228 | strbuf_add(sb, format, percent - format); | |
229 | if (!*percent) | |
230 | break; | |
231 | format = percent + 1; | |
232 | ||
0a0416a3 JK |
233 | if (*format == '%') { |
234 | strbuf_addch(sb, '%'); | |
235 | format++; | |
236 | continue; | |
237 | } | |
238 | ||
c3a670de MC |
239 | consumed = fn(sb, format, context); |
240 | if (consumed) | |
241 | format += consumed; | |
242 | else | |
cde75e59 RS |
243 | strbuf_addch(sb, '%'); |
244 | } | |
245 | } | |
246 | ||
9b864e73 RS |
247 | size_t strbuf_expand_dict_cb(struct strbuf *sb, const char *placeholder, |
248 | void *context) | |
249 | { | |
250 | struct strbuf_expand_dict_entry *e = context; | |
251 | size_t len; | |
252 | ||
253 | for (; e->placeholder && (len = strlen(e->placeholder)); e++) { | |
254 | if (!strncmp(placeholder, e->placeholder, len)) { | |
255 | if (e->value) | |
256 | strbuf_addstr(sb, e->value); | |
257 | return len; | |
258 | } | |
259 | } | |
260 | return 0; | |
261 | } | |
262 | ||
361df5df JK |
263 | void strbuf_addbuf_percentquote(struct strbuf *dst, const struct strbuf *src) |
264 | { | |
265 | int i, len = src->len; | |
266 | ||
267 | for (i = 0; i < len; i++) { | |
268 | if (src->buf[i] == '%') | |
269 | strbuf_addch(dst, '%'); | |
270 | strbuf_addch(dst, src->buf[i]); | |
271 | } | |
272 | } | |
273 | ||
917c9a71 PH |
274 | size_t strbuf_fread(struct strbuf *sb, size_t size, FILE *f) |
275 | { | |
b449f4cf | 276 | size_t res; |
2fc64700 | 277 | size_t oldalloc = sb->alloc; |
b449f4cf PH |
278 | |
279 | strbuf_grow(sb, size); | |
280 | res = fread(sb->buf + sb->len, 1, size, f); | |
2fc64700 | 281 | if (res > 0) |
b449f4cf | 282 | strbuf_setlen(sb, sb->len + res); |
6651c3f7 | 283 | else if (oldalloc == 0) |
2fc64700 | 284 | strbuf_release(sb); |
b449f4cf | 285 | return res; |
d1df5743 JH |
286 | } |
287 | ||
f1696ee3 | 288 | ssize_t strbuf_read(struct strbuf *sb, int fd, size_t hint) |
b449f4cf PH |
289 | { |
290 | size_t oldlen = sb->len; | |
2fc64700 | 291 | size_t oldalloc = sb->alloc; |
b449f4cf | 292 | |
f1696ee3 | 293 | strbuf_grow(sb, hint ? hint : 8192); |
b449f4cf PH |
294 | for (;;) { |
295 | ssize_t cnt; | |
296 | ||
b449f4cf PH |
297 | cnt = xread(fd, sb->buf + sb->len, sb->alloc - sb->len - 1); |
298 | if (cnt < 0) { | |
2fc64700 RS |
299 | if (oldalloc == 0) |
300 | strbuf_release(sb); | |
301 | else | |
302 | strbuf_setlen(sb, oldlen); | |
b449f4cf PH |
303 | return -1; |
304 | } | |
305 | if (!cnt) | |
306 | break; | |
307 | sb->len += cnt; | |
f1696ee3 | 308 | strbuf_grow(sb, 8192); |
b449f4cf PH |
309 | } |
310 | ||
311 | sb->buf[sb->len] = '\0'; | |
312 | return sb->len - oldlen; | |
d1df5743 JH |
313 | } |
314 | ||
b11b7e13 LT |
315 | #define STRBUF_MAXLINK (2*PATH_MAX) |
316 | ||
317 | int strbuf_readlink(struct strbuf *sb, const char *path, size_t hint) | |
318 | { | |
2fc64700 RS |
319 | size_t oldalloc = sb->alloc; |
320 | ||
b11b7e13 LT |
321 | if (hint < 32) |
322 | hint = 32; | |
323 | ||
324 | while (hint < STRBUF_MAXLINK) { | |
325 | int len; | |
326 | ||
327 | strbuf_grow(sb, hint); | |
328 | len = readlink(path, sb->buf, hint); | |
329 | if (len < 0) { | |
330 | if (errno != ERANGE) | |
331 | break; | |
332 | } else if (len < hint) { | |
333 | strbuf_setlen(sb, len); | |
334 | return 0; | |
335 | } | |
336 | ||
337 | /* .. the buffer was too small - try again */ | |
338 | hint *= 2; | |
339 | } | |
2fc64700 RS |
340 | if (oldalloc == 0) |
341 | strbuf_release(sb); | |
b11b7e13 LT |
342 | return -1; |
343 | } | |
344 | ||
c7e4f0d7 | 345 | int strbuf_getwholeline(struct strbuf *sb, FILE *fp, int term) |
917c9a71 | 346 | { |
d1df5743 | 347 | int ch; |
e6c019d0 PH |
348 | |
349 | strbuf_grow(sb, 0); | |
350 | if (feof(fp)) | |
351 | return EOF; | |
b449f4cf PH |
352 | |
353 | strbuf_reset(sb); | |
d1df5743 | 354 | while ((ch = fgetc(fp)) != EOF) { |
b449f4cf PH |
355 | strbuf_grow(sb, 1); |
356 | sb->buf[sb->len++] = ch; | |
c7e4f0d7 BC |
357 | if (ch == term) |
358 | break; | |
d1df5743 | 359 | } |
e6c019d0 PH |
360 | if (ch == EOF && sb->len == 0) |
361 | return EOF; | |
b449f4cf | 362 | |
b449f4cf | 363 | sb->buf[sb->len] = '\0'; |
e6c019d0 | 364 | return 0; |
d1df5743 | 365 | } |
a9390b9f | 366 | |
c7e4f0d7 BC |
367 | int strbuf_getline(struct strbuf *sb, FILE *fp, int term) |
368 | { | |
369 | if (strbuf_getwholeline(sb, fp, term)) | |
370 | return EOF; | |
371 | if (sb->buf[sb->len-1] == term) | |
372 | strbuf_setlen(sb, sb->len-1); | |
373 | return 0; | |
374 | } | |
375 | ||
387e7e19 | 376 | int strbuf_read_file(struct strbuf *sb, const char *path, size_t hint) |
a9390b9f KH |
377 | { |
378 | int fd, len; | |
379 | ||
380 | fd = open(path, O_RDONLY); | |
381 | if (fd < 0) | |
382 | return -1; | |
387e7e19 | 383 | len = strbuf_read(sb, fd, hint); |
a9390b9f KH |
384 | close(fd); |
385 | if (len < 0) | |
386 | return -1; | |
387 | ||
388 | return len; | |
389 | } |