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Commit | Line | Data |
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e93fc5d7 | 1 | #include "git-compat-util.h" |
f394e093 | 2 | #include "gettext.h" |
d88e8106 | 3 | #include "hex-ll.h" |
16b171fd | 4 | #include "strbuf.h" |
f6f77559 | 5 | #include "string-list.h" |
d4241f52 | 6 | #include "utf8.h" |
88c7b4c3 | 7 | #include "date.h" |
d1df5743 | 8 | |
95662315 CC |
9 | int starts_with(const char *str, const char *prefix) |
10 | { | |
11 | for (; ; str++, prefix++) | |
12 | if (!*prefix) | |
13 | return 1; | |
14 | else if (*str != *prefix) | |
15 | return 0; | |
16 | } | |
17 | ||
66b8af3e LS |
18 | int istarts_with(const char *str, const char *prefix) |
19 | { | |
20 | for (; ; str++, prefix++) | |
21 | if (!*prefix) | |
22 | return 1; | |
23 | else if (tolower(*str) != tolower(*prefix)) | |
24 | return 0; | |
25 | } | |
26 | ||
afaef55e CC |
27 | int skip_to_optional_arg_default(const char *str, const char *prefix, |
28 | const char **arg, const char *def) | |
29 | { | |
30 | const char *p; | |
31 | ||
32 | if (!skip_prefix(str, prefix, &p)) | |
33 | return 0; | |
34 | ||
35 | if (!*p) { | |
36 | if (arg) | |
37 | *arg = def; | |
38 | return 1; | |
39 | } | |
40 | ||
41 | if (*p != '=') | |
42 | return 0; | |
43 | ||
44 | if (arg) | |
45 | *arg = p + 1; | |
46 | return 1; | |
47 | } | |
48 | ||
b315c5c0 PH |
49 | /* |
50 | * Used as the default ->buf value, so that people can always assume | |
51 | * buf is non NULL and ->buf is NUL terminated even for a freshly | |
52 | * initialized strbuf. | |
53 | */ | |
54 | char strbuf_slopbuf[1]; | |
55 | ||
917c9a71 PH |
56 | void strbuf_init(struct strbuf *sb, size_t hint) |
57 | { | |
5726a6b4 ÆAB |
58 | struct strbuf blank = STRBUF_INIT; |
59 | memcpy(sb, &blank, sizeof(*sb)); | |
8c74ef1e | 60 | if (hint) |
f1696ee3 | 61 | strbuf_grow(sb, hint); |
d1df5743 JH |
62 | } |
63 | ||
917c9a71 PH |
64 | void strbuf_release(struct strbuf *sb) |
65 | { | |
b315c5c0 PH |
66 | if (sb->alloc) { |
67 | free(sb->buf); | |
68 | strbuf_init(sb, 0); | |
69 | } | |
b449f4cf PH |
70 | } |
71 | ||
b315c5c0 | 72 | char *strbuf_detach(struct strbuf *sb, size_t *sz) |
917c9a71 | 73 | { |
08ad56f3 JK |
74 | char *res; |
75 | strbuf_grow(sb, 0); | |
76 | res = sb->buf; | |
b315c5c0 PH |
77 | if (sz) |
78 | *sz = sb->len; | |
f1696ee3 | 79 | strbuf_init(sb, 0); |
b449f4cf PH |
80 | return res; |
81 | } | |
82 | ||
917c9a71 PH |
83 | void strbuf_attach(struct strbuf *sb, void *buf, size_t len, size_t alloc) |
84 | { | |
85 | strbuf_release(sb); | |
86 | sb->buf = buf; | |
87 | sb->len = len; | |
88 | sb->alloc = alloc; | |
89 | strbuf_grow(sb, 0); | |
90 | sb->buf[sb->len] = '\0'; | |
91 | } | |
92 | ||
93 | void strbuf_grow(struct strbuf *sb, size_t extra) | |
94 | { | |
8c74ef1e | 95 | int new_buf = !sb->alloc; |
1368f650 JN |
96 | if (unsigned_add_overflows(extra, 1) || |
97 | unsigned_add_overflows(sb->len, extra + 1)) | |
b449f4cf | 98 | die("you want to use way too much memory"); |
8c74ef1e | 99 | if (new_buf) |
b315c5c0 | 100 | sb->buf = NULL; |
b449f4cf | 101 | ALLOC_GROW(sb->buf, sb->len + extra + 1, sb->alloc); |
8c74ef1e TR |
102 | if (new_buf) |
103 | sb->buf[0] = '\0'; | |
b449f4cf PH |
104 | } |
105 | ||
eacd6dc5 LS |
106 | void strbuf_trim(struct strbuf *sb) |
107 | { | |
3bb55e8a BG |
108 | strbuf_rtrim(sb); |
109 | strbuf_ltrim(sb); | |
eacd6dc5 | 110 | } |
c64a8d20 | 111 | |
f1696ee3 PH |
112 | void strbuf_rtrim(struct strbuf *sb) |
113 | { | |
114 | while (sb->len > 0 && isspace((unsigned char)sb->buf[sb->len - 1])) | |
115 | sb->len--; | |
116 | sb->buf[sb->len] = '\0'; | |
117 | } | |
118 | ||
c64a8d20 NTND |
119 | void strbuf_trim_trailing_dir_sep(struct strbuf *sb) |
120 | { | |
121 | while (sb->len > 0 && is_dir_sep((unsigned char)sb->buf[sb->len - 1])) | |
122 | sb->len--; | |
123 | sb->buf[sb->len] = '\0'; | |
124 | } | |
125 | ||
f9573628 PK |
126 | void strbuf_trim_trailing_newline(struct strbuf *sb) |
127 | { | |
128 | if (sb->len > 0 && sb->buf[sb->len - 1] == '\n') { | |
129 | if (--sb->len > 0 && sb->buf[sb->len - 1] == '\r') | |
130 | --sb->len; | |
131 | sb->buf[sb->len] = '\0'; | |
132 | } | |
133 | } | |
134 | ||
eacd6dc5 LS |
135 | void strbuf_ltrim(struct strbuf *sb) |
136 | { | |
137 | char *b = sb->buf; | |
138 | while (sb->len > 0 && isspace(*b)) { | |
139 | b++; | |
140 | sb->len--; | |
141 | } | |
142 | memmove(sb->buf, b, sb->len); | |
143 | sb->buf[sb->len] = '\0'; | |
144 | } | |
145 | ||
d4241f52 JK |
146 | int strbuf_reencode(struct strbuf *sb, const char *from, const char *to) |
147 | { | |
148 | char *out; | |
c7d017d7 | 149 | size_t len; |
d4241f52 JK |
150 | |
151 | if (same_encoding(from, to)) | |
152 | return 0; | |
153 | ||
154 | out = reencode_string_len(sb->buf, sb->len, to, from, &len); | |
155 | if (!out) | |
156 | return -1; | |
157 | ||
158 | strbuf_attach(sb, out, len, len); | |
159 | return 0; | |
160 | } | |
161 | ||
ffb20ce1 JK |
162 | void strbuf_tolower(struct strbuf *sb) |
163 | { | |
164 | char *p = sb->buf, *end = sb->buf + sb->len; | |
165 | for (; p < end; p++) | |
166 | *p = tolower(*p); | |
167 | } | |
168 | ||
17b73dc6 MH |
169 | struct strbuf **strbuf_split_buf(const char *str, size_t slen, |
170 | int terminator, int max) | |
eacd6dc5 | 171 | { |
b8c2c1fa MH |
172 | struct strbuf **ret = NULL; |
173 | size_t nr = 0, alloc = 0; | |
eacd6dc5 LS |
174 | struct strbuf *t; |
175 | ||
1173bb33 MH |
176 | while (slen) { |
177 | int len = slen; | |
178 | if (max <= 0 || nr + 1 < max) { | |
17b73dc6 | 179 | const char *end = memchr(str, terminator, slen); |
1173bb33 MH |
180 | if (end) |
181 | len = end - str + 1; | |
182 | } | |
eacd6dc5 LS |
183 | t = xmalloc(sizeof(struct strbuf)); |
184 | strbuf_init(t, len); | |
1173bb33 | 185 | strbuf_add(t, str, len); |
b8c2c1fa MH |
186 | ALLOC_GROW(ret, nr + 2, alloc); |
187 | ret[nr++] = t; | |
1173bb33 MH |
188 | str += len; |
189 | slen -= len; | |
eacd6dc5 | 190 | } |
b8c2c1fa MH |
191 | ALLOC_GROW(ret, nr + 1, alloc); /* In case string was empty */ |
192 | ret[nr] = NULL; | |
eacd6dc5 LS |
193 | return ret; |
194 | } | |
195 | ||
f6f77559 EN |
196 | void strbuf_add_separated_string_list(struct strbuf *str, |
197 | const char *sep, | |
198 | struct string_list *slist) | |
199 | { | |
200 | struct string_list_item *item; | |
201 | int sep_needed = 0; | |
202 | ||
203 | for_each_string_list_item(item, slist) { | |
204 | if (sep_needed) | |
205 | strbuf_addstr(str, sep); | |
206 | strbuf_addstr(str, item->string); | |
207 | sep_needed = 1; | |
208 | } | |
209 | } | |
210 | ||
eacd6dc5 LS |
211 | void strbuf_list_free(struct strbuf **sbs) |
212 | { | |
213 | struct strbuf **s = sbs; | |
214 | ||
f3a96807 AH |
215 | if (!s) |
216 | return; | |
eacd6dc5 LS |
217 | while (*s) { |
218 | strbuf_release(*s); | |
219 | free(*s++); | |
220 | } | |
221 | free(sbs); | |
222 | } | |
223 | ||
9b200fd6 | 224 | int strbuf_cmp(const struct strbuf *a, const struct strbuf *b) |
45f66f64 | 225 | { |
26114c00 | 226 | size_t len = a->len < b->len ? a->len: b->len; |
8f024655 AR |
227 | int cmp = memcmp(a->buf, b->buf, len); |
228 | if (cmp) | |
229 | return cmp; | |
230 | return a->len < b->len ? -1: a->len != b->len; | |
45f66f64 PH |
231 | } |
232 | ||
917c9a71 PH |
233 | void strbuf_splice(struct strbuf *sb, size_t pos, size_t len, |
234 | const void *data, size_t dlen) | |
235 | { | |
1368f650 | 236 | if (unsigned_add_overflows(pos, len)) |
917c9a71 PH |
237 | die("you want to use way too much memory"); |
238 | if (pos > sb->len) | |
239 | die("`pos' is too far after the end of the buffer"); | |
240 | if (pos + len > sb->len) | |
241 | die("`pos + len' is too far after the end of the buffer"); | |
242 | ||
243 | if (dlen >= len) | |
244 | strbuf_grow(sb, dlen - len); | |
245 | memmove(sb->buf + pos + dlen, | |
246 | sb->buf + pos + len, | |
247 | sb->len - pos - len); | |
248 | memcpy(sb->buf + pos, data, dlen); | |
249 | strbuf_setlen(sb, sb->len + dlen - len); | |
250 | } | |
251 | ||
c76689df PH |
252 | void strbuf_insert(struct strbuf *sb, size_t pos, const void *data, size_t len) |
253 | { | |
254 | strbuf_splice(sb, pos, 0, data, len); | |
255 | } | |
256 | ||
5ef264db PSU |
257 | void strbuf_vinsertf(struct strbuf *sb, size_t pos, const char *fmt, va_list ap) |
258 | { | |
259 | int len, len2; | |
260 | char save; | |
261 | va_list cp; | |
262 | ||
263 | if (pos > sb->len) | |
264 | die("`pos' is too far after the end of the buffer"); | |
265 | va_copy(cp, ap); | |
266 | len = vsnprintf(sb->buf + sb->len, 0, fmt, cp); | |
267 | va_end(cp); | |
268 | if (len < 0) | |
269 | BUG("your vsnprintf is broken (returned %d)", len); | |
270 | if (!len) | |
271 | return; /* nothing to do */ | |
272 | if (unsigned_add_overflows(sb->len, len)) | |
273 | die("you want to use way too much memory"); | |
274 | strbuf_grow(sb, len); | |
275 | memmove(sb->buf + pos + len, sb->buf + pos, sb->len - pos); | |
276 | /* vsnprintf() will append a NUL, overwriting one of our characters */ | |
277 | save = sb->buf[pos + len]; | |
278 | len2 = vsnprintf(sb->buf + pos, len + 1, fmt, ap); | |
279 | sb->buf[pos + len] = save; | |
280 | if (len2 != len) | |
281 | BUG("your vsnprintf is broken (returns inconsistent lengths)"); | |
282 | strbuf_setlen(sb, sb->len + len); | |
283 | } | |
284 | ||
285 | void strbuf_insertf(struct strbuf *sb, size_t pos, const char *fmt, ...) | |
286 | { | |
287 | va_list ap; | |
288 | va_start(ap, fmt); | |
289 | strbuf_vinsertf(sb, pos, fmt, ap); | |
290 | va_end(ap); | |
291 | } | |
292 | ||
c76689df PH |
293 | void strbuf_remove(struct strbuf *sb, size_t pos, size_t len) |
294 | { | |
a8342a41 | 295 | strbuf_splice(sb, pos, len, "", 0); |
c76689df PH |
296 | } |
297 | ||
917c9a71 PH |
298 | void strbuf_add(struct strbuf *sb, const void *data, size_t len) |
299 | { | |
b449f4cf PH |
300 | strbuf_grow(sb, len); |
301 | memcpy(sb->buf + sb->len, data, len); | |
302 | strbuf_setlen(sb, sb->len + len); | |
303 | } | |
304 | ||
31471ba2 RS |
305 | void strbuf_addbuf(struct strbuf *sb, const struct strbuf *sb2) |
306 | { | |
307 | strbuf_grow(sb, sb2->len); | |
308 | memcpy(sb->buf + sb->len, sb2->buf, sb2->len); | |
309 | strbuf_setlen(sb, sb->len + sb2->len); | |
310 | } | |
311 | ||
e71c4a88 PSU |
312 | const char *strbuf_join_argv(struct strbuf *buf, |
313 | int argc, const char **argv, char delim) | |
314 | { | |
315 | if (!argc) | |
316 | return buf->buf; | |
317 | ||
318 | strbuf_addstr(buf, *argv); | |
319 | while (--argc) { | |
320 | strbuf_addch(buf, delim); | |
321 | strbuf_addstr(buf, *(++argv)); | |
322 | } | |
323 | ||
324 | return buf->buf; | |
325 | } | |
326 | ||
d07235a0 RS |
327 | void strbuf_addchars(struct strbuf *sb, int c, size_t n) |
328 | { | |
329 | strbuf_grow(sb, n); | |
330 | memset(sb->buf + sb->len, c, n); | |
331 | strbuf_setlen(sb, sb->len + n); | |
332 | } | |
333 | ||
917c9a71 PH |
334 | void strbuf_addf(struct strbuf *sb, const char *fmt, ...) |
335 | { | |
b449f4cf | 336 | va_list ap; |
ebeb6090 JK |
337 | va_start(ap, fmt); |
338 | strbuf_vaddf(sb, fmt, ap); | |
339 | va_end(ap); | |
340 | } | |
341 | ||
eff80a9f | 342 | static void add_lines(struct strbuf *out, |
db7f9309 JK |
343 | const char *prefix, |
344 | const char *buf, size_t size, | |
345 | int space_after_prefix) | |
eff80a9f JH |
346 | { |
347 | while (size) { | |
eff80a9f JH |
348 | const char *next = memchr(buf, '\n', size); |
349 | next = next ? (next + 1) : (buf + size); | |
350 | ||
eff80a9f | 351 | strbuf_addstr(out, prefix); |
db7f9309 JK |
352 | if (space_after_prefix && buf[0] != '\n' && buf[0] != '\t') |
353 | strbuf_addch(out, ' '); | |
eff80a9f JH |
354 | strbuf_add(out, buf, next - buf); |
355 | size -= next - buf; | |
356 | buf = next; | |
357 | } | |
358 | strbuf_complete_line(out); | |
359 | } | |
360 | ||
787cb8a4 | 361 | void strbuf_add_commented_lines(struct strbuf *out, const char *buf, |
2786d058 | 362 | size_t size, char comment_prefix) |
eff80a9f | 363 | { |
3b45450d | 364 | char prefix[2]; |
eff80a9f | 365 | |
2786d058 | 366 | prefix[0] = comment_prefix; |
3b45450d | 367 | prefix[1] = '\0'; |
db7f9309 | 368 | add_lines(out, prefix, buf, size, 1); |
eff80a9f JH |
369 | } |
370 | ||
3a35d962 | 371 | void strbuf_commented_addf(struct strbuf *sb, const char *comment_prefix, |
787cb8a4 | 372 | const char *fmt, ...) |
eff80a9f JH |
373 | { |
374 | va_list params; | |
375 | struct strbuf buf = STRBUF_INIT; | |
376 | int incomplete_line = sb->len && sb->buf[sb->len - 1] != '\n'; | |
377 | ||
378 | va_start(params, fmt); | |
379 | strbuf_vaddf(&buf, fmt, params); | |
380 | va_end(params); | |
381 | ||
3a35d962 JK |
382 | /* |
383 | * TODO Our commented_lines helper does not yet understand | |
384 | * comment strings. But since we know that the strings are | |
385 | * always single-char, we can cheat for the moment, and | |
386 | * fix this later. | |
387 | */ | |
388 | strbuf_add_commented_lines(sb, buf.buf, buf.len, comment_prefix[0]); | |
eff80a9f JH |
389 | if (incomplete_line) |
390 | sb->buf[--sb->len] = '\0'; | |
391 | ||
392 | strbuf_release(&buf); | |
393 | } | |
394 | ||
ebeb6090 JK |
395 | void strbuf_vaddf(struct strbuf *sb, const char *fmt, va_list ap) |
396 | { | |
397 | int len; | |
398 | va_list cp; | |
b449f4cf | 399 | |
f141bd80 SP |
400 | if (!strbuf_avail(sb)) |
401 | strbuf_grow(sb, 64); | |
ebeb6090 JK |
402 | va_copy(cp, ap); |
403 | len = vsnprintf(sb->buf + sb->len, sb->alloc - sb->len, fmt, cp); | |
404 | va_end(cp); | |
f141bd80 | 405 | if (len < 0) |
033abf97 | 406 | BUG("your vsnprintf is broken (returned %d)", len); |
f1696ee3 | 407 | if (len > strbuf_avail(sb)) { |
b449f4cf | 408 | strbuf_grow(sb, len); |
b449f4cf | 409 | len = vsnprintf(sb->buf + sb->len, sb->alloc - sb->len, fmt, ap); |
ebeb6090 | 410 | if (len > strbuf_avail(sb)) |
033abf97 | 411 | BUG("your vsnprintf is broken (insatiable)"); |
b449f4cf PH |
412 | } |
413 | strbuf_setlen(sb, sb->len + len); | |
d1df5743 JH |
414 | } |
415 | ||
44ccb337 | 416 | int strbuf_expand_step(struct strbuf *sb, const char **formatp) |
cde75e59 | 417 | { |
44ccb337 RS |
418 | const char *format = *formatp; |
419 | const char *percent = strchrnul(format, '%'); | |
0a0416a3 | 420 | |
44ccb337 RS |
421 | strbuf_add(sb, format, percent - format); |
422 | if (!*percent) | |
423 | return 0; | |
424 | *formatp = percent + 1; | |
425 | return 1; | |
cde75e59 RS |
426 | } |
427 | ||
4416b86c | 428 | size_t strbuf_expand_literal(struct strbuf *sb, const char *placeholder) |
fd2015b3 AW |
429 | { |
430 | int ch; | |
431 | ||
432 | switch (placeholder[0]) { | |
433 | case 'n': /* newline */ | |
434 | strbuf_addch(sb, '\n'); | |
435 | return 1; | |
436 | case 'x': | |
437 | /* %x00 == NUL, %x0a == LF, etc. */ | |
438 | ch = hex2chr(placeholder + 1); | |
439 | if (ch < 0) | |
440 | return 0; | |
441 | strbuf_addch(sb, ch); | |
442 | return 3; | |
443 | } | |
444 | return 0; | |
445 | } | |
446 | ||
361df5df JK |
447 | void strbuf_addbuf_percentquote(struct strbuf *dst, const struct strbuf *src) |
448 | { | |
26114c00 | 449 | size_t i, len = src->len; |
361df5df JK |
450 | |
451 | for (i = 0; i < len; i++) { | |
452 | if (src->buf[i] == '%') | |
453 | strbuf_addch(dst, '%'); | |
454 | strbuf_addch(dst, src->buf[i]); | |
455 | } | |
456 | } | |
457 | ||
b44d0118 | 458 | #define URL_UNSAFE_CHARS " <>\"%{}|\\^`:?#[]@!$&'()*+,;=" |
46fd7b39 | 459 | |
b44d0118 | 460 | void strbuf_add_percentencode(struct strbuf *dst, const char *src, int flags) |
46fd7b39 | 461 | { |
462 | size_t i, len = strlen(src); | |
463 | ||
464 | for (i = 0; i < len; i++) { | |
465 | unsigned char ch = src[i]; | |
b44d0118 | 466 | if (ch <= 0x1F || ch >= 0x7F || |
467 | (ch == '/' && (flags & STRBUF_ENCODE_SLASH)) || | |
468 | strchr(URL_UNSAFE_CHARS, ch)) | |
46fd7b39 | 469 | strbuf_addf(dst, "%%%02X", (unsigned char)ch); |
470 | else | |
471 | strbuf_addch(dst, ch); | |
472 | } | |
473 | } | |
474 | ||
917c9a71 PH |
475 | size_t strbuf_fread(struct strbuf *sb, size_t size, FILE *f) |
476 | { | |
b449f4cf | 477 | size_t res; |
2fc64700 | 478 | size_t oldalloc = sb->alloc; |
b449f4cf PH |
479 | |
480 | strbuf_grow(sb, size); | |
481 | res = fread(sb->buf + sb->len, 1, size, f); | |
2fc64700 | 482 | if (res > 0) |
b449f4cf | 483 | strbuf_setlen(sb, sb->len + res); |
6651c3f7 | 484 | else if (oldalloc == 0) |
2fc64700 | 485 | strbuf_release(sb); |
b449f4cf | 486 | return res; |
d1df5743 JH |
487 | } |
488 | ||
f1696ee3 | 489 | ssize_t strbuf_read(struct strbuf *sb, int fd, size_t hint) |
b449f4cf PH |
490 | { |
491 | size_t oldlen = sb->len; | |
2fc64700 | 492 | size_t oldalloc = sb->alloc; |
b449f4cf | 493 | |
f1696ee3 | 494 | strbuf_grow(sb, hint ? hint : 8192); |
b449f4cf | 495 | for (;;) { |
3ebbd00c JH |
496 | ssize_t want = sb->alloc - sb->len - 1; |
497 | ssize_t got = read_in_full(fd, sb->buf + sb->len, want); | |
b449f4cf | 498 | |
3ebbd00c | 499 | if (got < 0) { |
2fc64700 RS |
500 | if (oldalloc == 0) |
501 | strbuf_release(sb); | |
502 | else | |
503 | strbuf_setlen(sb, oldlen); | |
b449f4cf PH |
504 | return -1; |
505 | } | |
3ebbd00c JH |
506 | sb->len += got; |
507 | if (got < want) | |
b449f4cf | 508 | break; |
f1696ee3 | 509 | strbuf_grow(sb, 8192); |
b449f4cf PH |
510 | } |
511 | ||
512 | sb->buf[sb->len] = '\0'; | |
513 | return sb->len - oldlen; | |
d1df5743 JH |
514 | } |
515 | ||
b4e04fb6 SB |
516 | ssize_t strbuf_read_once(struct strbuf *sb, int fd, size_t hint) |
517 | { | |
c3ff8f6c | 518 | size_t oldalloc = sb->alloc; |
b4e04fb6 SB |
519 | ssize_t cnt; |
520 | ||
521 | strbuf_grow(sb, hint ? hint : 8192); | |
522 | cnt = xread(fd, sb->buf + sb->len, sb->alloc - sb->len - 1); | |
523 | if (cnt > 0) | |
524 | strbuf_setlen(sb, sb->len + cnt); | |
c3ff8f6c RS |
525 | else if (oldalloc == 0) |
526 | strbuf_release(sb); | |
b4e04fb6 SB |
527 | return cnt; |
528 | } | |
529 | ||
2dac9b56 SB |
530 | ssize_t strbuf_write(struct strbuf *sb, FILE *f) |
531 | { | |
532 | return sb->len ? fwrite(sb->buf, 1, sb->len, f) : 0; | |
533 | } | |
534 | ||
b11b7e13 LT |
535 | #define STRBUF_MAXLINK (2*PATH_MAX) |
536 | ||
537 | int strbuf_readlink(struct strbuf *sb, const char *path, size_t hint) | |
538 | { | |
2fc64700 RS |
539 | size_t oldalloc = sb->alloc; |
540 | ||
b11b7e13 LT |
541 | if (hint < 32) |
542 | hint = 32; | |
543 | ||
544 | while (hint < STRBUF_MAXLINK) { | |
f3e76ed2 | 545 | ssize_t len; |
b11b7e13 LT |
546 | |
547 | strbuf_grow(sb, hint); | |
548 | len = readlink(path, sb->buf, hint); | |
549 | if (len < 0) { | |
550 | if (errno != ERANGE) | |
551 | break; | |
552 | } else if (len < hint) { | |
553 | strbuf_setlen(sb, len); | |
554 | return 0; | |
555 | } | |
556 | ||
557 | /* .. the buffer was too small - try again */ | |
558 | hint *= 2; | |
559 | } | |
2fc64700 RS |
560 | if (oldalloc == 0) |
561 | strbuf_release(sb); | |
b11b7e13 LT |
562 | return -1; |
563 | } | |
564 | ||
f22a76e9 RS |
565 | int strbuf_getcwd(struct strbuf *sb) |
566 | { | |
567 | size_t oldalloc = sb->alloc; | |
568 | size_t guessed_len = 128; | |
569 | ||
570 | for (;; guessed_len *= 2) { | |
571 | strbuf_grow(sb, guessed_len); | |
572 | if (getcwd(sb->buf, sb->alloc)) { | |
573 | strbuf_setlen(sb, strlen(sb->buf)); | |
574 | return 0; | |
575 | } | |
a54e938e RS |
576 | |
577 | /* | |
578 | * If getcwd(3) is implemented as a syscall that falls | |
579 | * back to a regular lookup using readdir(3) etc. then | |
580 | * we may be able to avoid EACCES by providing enough | |
581 | * space to the syscall as it's not necessarily bound | |
582 | * to the same restrictions as the fallback. | |
583 | */ | |
584 | if (errno == EACCES && guessed_len < PATH_MAX) | |
585 | continue; | |
586 | ||
f22a76e9 RS |
587 | if (errno != ERANGE) |
588 | break; | |
589 | } | |
590 | if (oldalloc == 0) | |
591 | strbuf_release(sb); | |
592 | else | |
593 | strbuf_reset(sb); | |
594 | return -1; | |
595 | } | |
596 | ||
0cc30e0e JK |
597 | #ifdef HAVE_GETDELIM |
598 | int strbuf_getwholeline(struct strbuf *sb, FILE *fp, int term) | |
599 | { | |
600 | ssize_t r; | |
601 | ||
602 | if (feof(fp)) | |
603 | return EOF; | |
604 | ||
605 | strbuf_reset(sb); | |
606 | ||
607 | /* Translate slopbuf to NULL, as we cannot call realloc on it */ | |
608 | if (!sb->alloc) | |
609 | sb->buf = NULL; | |
642956cf | 610 | errno = 0; |
0cc30e0e JK |
611 | r = getdelim(&sb->buf, &sb->alloc, term, fp); |
612 | ||
613 | if (r > 0) { | |
614 | sb->len = r; | |
615 | return 0; | |
616 | } | |
617 | assert(r == -1); | |
618 | ||
619 | /* | |
620 | * Normally we would have called xrealloc, which will try to free | |
621 | * memory and recover. But we have no way to tell getdelim() to do so. | |
622 | * Worse, we cannot try to recover ENOMEM ourselves, because we have | |
623 | * no idea how many bytes were read by getdelim. | |
624 | * | |
625 | * Dying here is reasonable. It mirrors what xrealloc would do on | |
626 | * catastrophic memory failure. We skip the opportunity to free pack | |
627 | * memory and retry, but that's unlikely to help for a malloc small | |
628 | * enough to hold a single line of input, anyway. | |
629 | */ | |
630 | if (errno == ENOMEM) | |
631 | die("Out of memory, getdelim failed"); | |
632 | ||
b7090430 JK |
633 | /* |
634 | * Restore strbuf invariants; if getdelim left us with a NULL pointer, | |
635 | * we can just re-init, but otherwise we should make sure that our | |
636 | * length is empty, and that the result is NUL-terminated. | |
637 | */ | |
0cc30e0e JK |
638 | if (!sb->buf) |
639 | strbuf_init(sb, 0); | |
b7090430 JK |
640 | else |
641 | strbuf_reset(sb); | |
0cc30e0e JK |
642 | return EOF; |
643 | } | |
644 | #else | |
c7e4f0d7 | 645 | int strbuf_getwholeline(struct strbuf *sb, FILE *fp, int term) |
917c9a71 | 646 | { |
d1df5743 | 647 | int ch; |
e6c019d0 | 648 | |
e6c019d0 PH |
649 | if (feof(fp)) |
650 | return EOF; | |
b449f4cf PH |
651 | |
652 | strbuf_reset(sb); | |
82912d1d JK |
653 | flockfile(fp); |
654 | while ((ch = getc_unlocked(fp)) != EOF) { | |
f80c153b JK |
655 | if (!strbuf_avail(sb)) |
656 | strbuf_grow(sb, 1); | |
b449f4cf | 657 | sb->buf[sb->len++] = ch; |
c7e4f0d7 BC |
658 | if (ch == term) |
659 | break; | |
d1df5743 | 660 | } |
82912d1d | 661 | funlockfile(fp); |
e6c019d0 PH |
662 | if (ch == EOF && sb->len == 0) |
663 | return EOF; | |
b449f4cf | 664 | |
b449f4cf | 665 | sb->buf[sb->len] = '\0'; |
e6c019d0 | 666 | return 0; |
d1df5743 | 667 | } |
0cc30e0e | 668 | #endif |
a9390b9f | 669 | |
bd021f39 PS |
670 | int strbuf_appendwholeline(struct strbuf *sb, FILE *fp, int term) |
671 | { | |
672 | struct strbuf line = STRBUF_INIT; | |
673 | if (strbuf_getwholeline(&line, fp, term)) | |
674 | return EOF; | |
675 | strbuf_addbuf(sb, &line); | |
676 | strbuf_release(&line); | |
677 | return 0; | |
678 | } | |
679 | ||
1a0c8dfd | 680 | static int strbuf_getdelim(struct strbuf *sb, FILE *fp, int term) |
c7e4f0d7 BC |
681 | { |
682 | if (strbuf_getwholeline(sb, fp, term)) | |
683 | return EOF; | |
dce80bd1 JH |
684 | if (sb->buf[sb->len - 1] == term) |
685 | strbuf_setlen(sb, sb->len - 1); | |
c7e4f0d7 BC |
686 | return 0; |
687 | } | |
688 | ||
af35e56b | 689 | int strbuf_getdelim_strip_crlf(struct strbuf *sb, FILE *fp, int term) |
c8aa9fdf | 690 | { |
af35e56b | 691 | if (strbuf_getwholeline(sb, fp, term)) |
c8aa9fdf | 692 | return EOF; |
af35e56b | 693 | if (term == '\n' && sb->buf[sb->len - 1] == '\n') { |
c8aa9fdf JH |
694 | strbuf_setlen(sb, sb->len - 1); |
695 | if (sb->len && sb->buf[sb->len - 1] == '\r') | |
696 | strbuf_setlen(sb, sb->len - 1); | |
697 | } | |
698 | return 0; | |
699 | } | |
700 | ||
af35e56b PS |
701 | int strbuf_getline(struct strbuf *sb, FILE *fp) |
702 | { | |
703 | return strbuf_getdelim_strip_crlf(sb, fp, '\n'); | |
704 | } | |
705 | ||
8f309aeb JH |
706 | int strbuf_getline_lf(struct strbuf *sb, FILE *fp) |
707 | { | |
1a0c8dfd | 708 | return strbuf_getdelim(sb, fp, '\n'); |
8f309aeb JH |
709 | } |
710 | ||
711 | int strbuf_getline_nul(struct strbuf *sb, FILE *fp) | |
712 | { | |
1a0c8dfd | 713 | return strbuf_getdelim(sb, fp, '\0'); |
8f309aeb JH |
714 | } |
715 | ||
5e8617f5 TR |
716 | int strbuf_getwholeline_fd(struct strbuf *sb, int fd, int term) |
717 | { | |
718 | strbuf_reset(sb); | |
719 | ||
720 | while (1) { | |
721 | char ch; | |
722 | ssize_t len = xread(fd, &ch, 1); | |
723 | if (len <= 0) | |
724 | return EOF; | |
725 | strbuf_addch(sb, ch); | |
726 | if (ch == term) | |
727 | break; | |
728 | } | |
729 | return 0; | |
730 | } | |
731 | ||
6c8afe49 | 732 | ssize_t strbuf_read_file(struct strbuf *sb, const char *path, size_t hint) |
a9390b9f | 733 | { |
6c8afe49 MH |
734 | int fd; |
735 | ssize_t len; | |
79f0ba15 | 736 | int saved_errno; |
a9390b9f KH |
737 | |
738 | fd = open(path, O_RDONLY); | |
739 | if (fd < 0) | |
740 | return -1; | |
387e7e19 | 741 | len = strbuf_read(sb, fd, hint); |
79f0ba15 | 742 | saved_errno = errno; |
a9390b9f | 743 | close(fd); |
79f0ba15 JK |
744 | if (len < 0) { |
745 | errno = saved_errno; | |
a9390b9f | 746 | return -1; |
79f0ba15 | 747 | } |
a9390b9f KH |
748 | |
749 | return len; | |
750 | } | |
895680f0 JH |
751 | |
752 | void strbuf_add_lines(struct strbuf *out, const char *prefix, | |
753 | const char *buf, size_t size) | |
754 | { | |
db7f9309 | 755 | add_lines(out, prefix, buf, size, 0); |
895680f0 | 756 | } |
367d20ec | 757 | |
5963c036 MH |
758 | void strbuf_addstr_xml_quoted(struct strbuf *buf, const char *s) |
759 | { | |
760 | while (*s) { | |
761 | size_t len = strcspn(s, "\"<>&"); | |
762 | strbuf_add(buf, s, len); | |
763 | s += len; | |
764 | switch (*s) { | |
765 | case '"': | |
766 | strbuf_addstr(buf, """); | |
767 | break; | |
768 | case '<': | |
769 | strbuf_addstr(buf, "<"); | |
770 | break; | |
771 | case '>': | |
772 | strbuf_addstr(buf, ">"); | |
773 | break; | |
774 | case '&': | |
775 | strbuf_addstr(buf, "&"); | |
776 | break; | |
777 | case 0: | |
778 | return; | |
779 | } | |
780 | s++; | |
781 | } | |
782 | } | |
783 | ||
ea03a8e1 | 784 | static void strbuf_add_urlencode(struct strbuf *sb, const char *s, size_t len, |
c2694952 | 785 | char_predicate allow_unencoded_fn) |
c505116b JK |
786 | { |
787 | strbuf_grow(sb, len); | |
788 | while (len--) { | |
789 | char ch = *s++; | |
c2694952 | 790 | if (allow_unencoded_fn(ch)) |
c505116b JK |
791 | strbuf_addch(sb, ch); |
792 | else | |
4c267f2a | 793 | strbuf_addf(sb, "%%%02x", (unsigned char)ch); |
c505116b JK |
794 | } |
795 | } | |
796 | ||
797 | void strbuf_addstr_urlencode(struct strbuf *sb, const char *s, | |
c2694952 | 798 | char_predicate allow_unencoded_fn) |
c505116b | 799 | { |
c2694952 | 800 | strbuf_add_urlencode(sb, s, strlen(s), allow_unencoded_fn); |
c505116b | 801 | } |
9a0a30aa | 802 | |
8f354a1f DR |
803 | static void strbuf_humanise(struct strbuf *buf, off_t bytes, |
804 | int humanise_rate) | |
079b546a AP |
805 | { |
806 | if (bytes > 1 << 30) { | |
8f354a1f DR |
807 | strbuf_addf(buf, |
808 | humanise_rate == 0 ? | |
809 | /* TRANSLATORS: IEC 80000-13:2008 gibibyte */ | |
810 | _("%u.%2.2u GiB") : | |
811 | /* TRANSLATORS: IEC 80000-13:2008 gibibyte/second */ | |
812 | _("%u.%2.2u GiB/s"), | |
7726d360 JK |
813 | (unsigned)(bytes >> 30), |
814 | (unsigned)(bytes & ((1 << 30) - 1)) / 10737419); | |
079b546a | 815 | } else if (bytes > 1 << 20) { |
7726d360 | 816 | unsigned x = bytes + 5243; /* for rounding */ |
8f354a1f DR |
817 | strbuf_addf(buf, |
818 | humanise_rate == 0 ? | |
819 | /* TRANSLATORS: IEC 80000-13:2008 mebibyte */ | |
820 | _("%u.%2.2u MiB") : | |
821 | /* TRANSLATORS: IEC 80000-13:2008 mebibyte/second */ | |
822 | _("%u.%2.2u MiB/s"), | |
079b546a AP |
823 | x >> 20, ((x & ((1 << 20) - 1)) * 100) >> 20); |
824 | } else if (bytes > 1 << 10) { | |
7726d360 | 825 | unsigned x = bytes + 5; /* for rounding */ |
8f354a1f DR |
826 | strbuf_addf(buf, |
827 | humanise_rate == 0 ? | |
828 | /* TRANSLATORS: IEC 80000-13:2008 kibibyte */ | |
829 | _("%u.%2.2u KiB") : | |
830 | /* TRANSLATORS: IEC 80000-13:2008 kibibyte/second */ | |
831 | _("%u.%2.2u KiB/s"), | |
079b546a AP |
832 | x >> 10, ((x & ((1 << 10) - 1)) * 100) >> 10); |
833 | } else { | |
8f354a1f DR |
834 | strbuf_addf(buf, |
835 | humanise_rate == 0 ? | |
836 | /* TRANSLATORS: IEC 80000-13:2008 byte */ | |
6f693252 | 837 | Q_("%u byte", "%u bytes", bytes) : |
8f354a1f | 838 | /* TRANSLATORS: IEC 80000-13:2008 byte/second */ |
6f693252 | 839 | Q_("%u byte/s", "%u bytes/s", bytes), |
8f354a1f | 840 | (unsigned)bytes); |
079b546a AP |
841 | } |
842 | } | |
843 | ||
8f354a1f DR |
844 | void strbuf_humanise_bytes(struct strbuf *buf, off_t bytes) |
845 | { | |
846 | strbuf_humanise(buf, bytes, 0); | |
847 | } | |
848 | ||
849 | void strbuf_humanise_rate(struct strbuf *buf, off_t bytes) | |
850 | { | |
851 | strbuf_humanise(buf, bytes, 1); | |
852 | } | |
853 | ||
9a0a30aa NTND |
854 | int printf_ln(const char *fmt, ...) |
855 | { | |
856 | int ret; | |
857 | va_list ap; | |
858 | va_start(ap, fmt); | |
859 | ret = vprintf(fmt, ap); | |
860 | va_end(ap); | |
861 | if (ret < 0 || putchar('\n') == EOF) | |
862 | return -1; | |
863 | return ret + 1; | |
864 | } | |
865 | ||
866 | int fprintf_ln(FILE *fp, const char *fmt, ...) | |
867 | { | |
868 | int ret; | |
869 | va_list ap; | |
870 | va_start(ap, fmt); | |
871 | ret = vfprintf(fp, fmt, ap); | |
872 | va_end(ap); | |
873 | if (ret < 0 || putc('\n', fp) == EOF) | |
874 | return -1; | |
875 | return ret + 1; | |
876 | } | |
88d5a6f6 JK |
877 | |
878 | char *xstrdup_tolower(const char *string) | |
879 | { | |
880 | char *result; | |
881 | size_t len, i; | |
882 | ||
883 | len = strlen(string); | |
3733e694 | 884 | result = xmallocz(len); |
88d5a6f6 JK |
885 | for (i = 0; i < len; i++) |
886 | result[i] = tolower(string[i]); | |
88d5a6f6 JK |
887 | return result; |
888 | } | |
30a0ddb7 | 889 | |
13ecb463 LS |
890 | char *xstrdup_toupper(const char *string) |
891 | { | |
892 | char *result; | |
893 | size_t len, i; | |
894 | ||
895 | len = strlen(string); | |
896 | result = xmallocz(len); | |
897 | for (i = 0; i < len; i++) | |
898 | result[i] = toupper(string[i]); | |
88d5a6f6 JK |
899 | return result; |
900 | } | |
30a0ddb7 JK |
901 | |
902 | char *xstrvfmt(const char *fmt, va_list ap) | |
903 | { | |
904 | struct strbuf buf = STRBUF_INIT; | |
905 | strbuf_vaddf(&buf, fmt, ap); | |
906 | return strbuf_detach(&buf, NULL); | |
907 | } | |
908 | ||
909 | char *xstrfmt(const char *fmt, ...) | |
910 | { | |
911 | va_list ap; | |
912 | char *ret; | |
913 | ||
914 | va_start(ap, fmt); | |
915 | ret = xstrvfmt(fmt, ap); | |
916 | va_end(ap); | |
917 | ||
918 | return ret; | |
919 | } | |
aa1462cc | 920 | |
c3fbf81a | 921 | void strbuf_addftime(struct strbuf *sb, const char *fmt, const struct tm *tm, |
3b702239 | 922 | int tz_offset, int suppress_tz_name) |
aa1462cc | 923 | { |
c3fbf81a | 924 | struct strbuf munged_fmt = STRBUF_INIT; |
e4f031e3 | 925 | size_t hint = 128; |
aa1462cc JK |
926 | size_t len; |
927 | ||
e4f031e3 JK |
928 | if (!*fmt) |
929 | return; | |
930 | ||
c3fbf81a RS |
931 | /* |
932 | * There is no portable way to pass timezone information to | |
9b591b94 JK |
933 | * strftime, so we handle %z and %Z here. Likewise '%s', because |
934 | * going back to an epoch time requires knowing the zone. | |
935 | * | |
936 | * Note that tz_offset is in the "[-+]HHMM" decimal form; this is what | |
937 | * we want for %z, but the computation for %s has to convert to number | |
938 | * of seconds. | |
c3fbf81a | 939 | */ |
44ccb337 | 940 | while (strbuf_expand_step(&munged_fmt, &fmt)) { |
945c7225 | 941 | if (skip_prefix(fmt, "%", &fmt)) |
c3fbf81a | 942 | strbuf_addstr(&munged_fmt, "%%"); |
945c7225 | 943 | else if (skip_prefix(fmt, "s", &fmt)) |
9b591b94 JK |
944 | strbuf_addf(&munged_fmt, "%"PRItime, |
945 | (timestamp_t)tm_to_time_t(tm) - | |
946 | 3600 * (tz_offset / 100) - | |
947 | 60 * (tz_offset % 100)); | |
945c7225 | 948 | else if (skip_prefix(fmt, "z", &fmt)) |
c3fbf81a | 949 | strbuf_addf(&munged_fmt, "%+05d", tz_offset); |
945c7225 RS |
950 | else if (suppress_tz_name && skip_prefix(fmt, "Z", &fmt)) |
951 | ; /* nothing */ | |
952 | else | |
c3fbf81a | 953 | strbuf_addch(&munged_fmt, '%'); |
c3fbf81a RS |
954 | } |
955 | fmt = munged_fmt.buf; | |
956 | ||
e4f031e3 | 957 | strbuf_grow(sb, hint); |
aa1462cc JK |
958 | len = strftime(sb->buf + sb->len, sb->alloc - sb->len, fmt, tm); |
959 | ||
960 | if (!len) { | |
961 | /* | |
e4f031e3 JK |
962 | * strftime reports "0" if it could not fit the result in the buffer. |
963 | * Unfortunately, it also reports "0" if the requested time string | |
964 | * takes 0 bytes. So our strategy is to munge the format so that the | |
965 | * output contains at least one character, and then drop the extra | |
966 | * character before returning. | |
aa1462cc | 967 | */ |
c3fbf81a | 968 | strbuf_addch(&munged_fmt, ' '); |
e4f031e3 JK |
969 | while (!len) { |
970 | hint *= 2; | |
971 | strbuf_grow(sb, hint); | |
972 | len = strftime(sb->buf + sb->len, sb->alloc - sb->len, | |
973 | munged_fmt.buf, tm); | |
974 | } | |
e4f031e3 | 975 | len--; /* drop munged space */ |
aa1462cc | 976 | } |
c3fbf81a | 977 | strbuf_release(&munged_fmt); |
e4f031e3 | 978 | strbuf_setlen(sb, sb->len + len); |
aa1462cc | 979 | } |
af49c6d0 | 980 | |
63af4a84 TK |
981 | /* |
982 | * Returns the length of a line, without trailing spaces. | |
983 | * | |
984 | * If the line ends with newline, it will be removed too. | |
985 | */ | |
986 | static size_t cleanup(char *line, size_t len) | |
987 | { | |
988 | while (len) { | |
989 | unsigned char c = line[len - 1]; | |
990 | if (!isspace(c)) | |
991 | break; | |
992 | len--; | |
993 | } | |
994 | ||
995 | return len; | |
996 | } | |
997 | ||
998 | /* | |
999 | * Remove empty lines from the beginning and end | |
1000 | * and also trailing spaces from every line. | |
1001 | * | |
1002 | * Turn multiple consecutive empty lines between paragraphs | |
1003 | * into just one empty line. | |
1004 | * | |
1005 | * If the input has only empty lines and spaces, | |
1006 | * no output will be produced. | |
1007 | * | |
1008 | * If last line does not have a newline at the end, one is added. | |
1009 | * | |
2982b656 | 1010 | * Pass a non-NULL comment_prefix to skip every line starting |
787cb8a4 | 1011 | * with it. |
63af4a84 | 1012 | */ |
2982b656 | 1013 | void strbuf_stripspace(struct strbuf *sb, const char *comment_prefix) |
63af4a84 | 1014 | { |
26114c00 | 1015 | size_t empties = 0; |
63af4a84 TK |
1016 | size_t i, j, len, newlen; |
1017 | char *eol; | |
1018 | ||
1019 | /* We may have to add a newline. */ | |
1020 | strbuf_grow(sb, 1); | |
1021 | ||
1022 | for (i = j = 0; i < sb->len; i += len, j += newlen) { | |
1023 | eol = memchr(sb->buf + i, '\n', sb->len - i); | |
1024 | len = eol ? eol - (sb->buf + i) + 1 : sb->len - i; | |
1025 | ||
2786d058 | 1026 | if (comment_prefix && len && |
2982b656 | 1027 | starts_with(sb->buf + i, comment_prefix)) { |
63af4a84 TK |
1028 | newlen = 0; |
1029 | continue; | |
1030 | } | |
1031 | newlen = cleanup(sb->buf + i, len); | |
1032 | ||
1033 | /* Not just an empty line? */ | |
1034 | if (newlen) { | |
1035 | if (empties > 0 && j > 0) | |
1036 | sb->buf[j++] = '\n'; | |
1037 | empties = 0; | |
1038 | memmove(sb->buf + j, sb->buf + i, newlen); | |
1039 | sb->buf[newlen + j++] = '\n'; | |
1040 | } else { | |
1041 | empties++; | |
1042 | } | |
1043 | } | |
1044 | ||
1045 | strbuf_setlen(sb, j); | |
1046 | } | |
670c359d | 1047 | |
9ea57964 DS |
1048 | void strbuf_strip_file_from_path(struct strbuf *sb) |
1049 | { | |
1050 | char *path_sep = find_last_dir_sep(sb->buf); | |
1051 | strbuf_setlen(sb, path_sep ? path_sep - sb->buf + 1 : 0); | |
1052 | } |