freshlybakedca.ke
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1#define DISABLE_SIGN_COMPARE_WARNINGS
2
3#include "git-compat-util.h"
4#include "gettext.h"
5#include "hex-ll.h"
6#include "strbuf.h"
7#include "string-list.h"
8#include "utf8.h"
9#include "date.h"
10
11bool starts_with(const char *str, const char *prefix)
12{
13 for (; ; str++, prefix++)
14 if (!*prefix)
15 return true;
16 else if (*str != *prefix)
17 return false;
18}
19
20bool istarts_with(const char *str, const char *prefix)
21{
22 for (; ; str++, prefix++)
23 if (!*prefix)
24 return true;
25 else if (tolower(*str) != tolower(*prefix))
26 return false;
27}
28
29bool starts_with_mem(const char *str, size_t len, const char *prefix)
30{
31 const char *end = str + len;
32 for (; ; str++, prefix++) {
33 if (!*prefix)
34 return true;
35 else if (str == end || *str != *prefix)
36 return false;
37 }
38}
39
40bool skip_to_optional_arg_default(const char *str, const char *prefix,
41 const char **arg, const char *def)
42{
43 const char *p;
44
45 if (!skip_prefix(str, prefix, &p))
46 return false;
47
48 if (!*p) {
49 if (arg)
50 *arg = def;
51 return true;
52 }
53
54 if (*p != '=')
55 return false;
56
57 if (arg)
58 *arg = p + 1;
59 return true;
60}
61
62/*
63 * Used as the default ->buf value, so that people can always assume
64 * buf is non NULL and ->buf is NUL terminated even for a freshly
65 * initialized strbuf.
66 */
67char strbuf_slopbuf[1];
68
69void strbuf_init(struct strbuf *sb, size_t hint)
70{
71 struct strbuf blank = STRBUF_INIT;
72 memcpy(sb, &blank, sizeof(*sb));
73 if (hint)
74 strbuf_grow(sb, hint);
75}
76
77void strbuf_release(struct strbuf *sb)
78{
79 if (sb->alloc) {
80 free(sb->buf);
81 strbuf_init(sb, 0);
82 }
83}
84
85char *strbuf_detach(struct strbuf *sb, size_t *sz)
86{
87 char *res;
88 strbuf_grow(sb, 0);
89 res = sb->buf;
90 if (sz)
91 *sz = sb->len;
92 strbuf_init(sb, 0);
93 return res;
94}
95
96void strbuf_attach(struct strbuf *sb, void *buf, size_t len, size_t alloc)
97{
98 strbuf_release(sb);
99 sb->buf = buf;
100 sb->len = len;
101 sb->alloc = alloc;
102 strbuf_grow(sb, 0);
103 sb->buf[sb->len] = '\0';
104}
105
106void strbuf_grow(struct strbuf *sb, size_t extra)
107{
108 int new_buf = !sb->alloc;
109 if (unsigned_add_overflows(extra, 1) ||
110 unsigned_add_overflows(sb->len, extra + 1))
111 die("you want to use way too much memory");
112 if (new_buf)
113 sb->buf = NULL;
114 ALLOC_GROW(sb->buf, sb->len + extra + 1, sb->alloc);
115 if (new_buf)
116 sb->buf[0] = '\0';
117}
118
119void strbuf_trim(struct strbuf *sb)
120{
121 strbuf_rtrim(sb);
122 strbuf_ltrim(sb);
123}
124
125void strbuf_rtrim(struct strbuf *sb)
126{
127 while (sb->len > 0 && isspace((unsigned char)sb->buf[sb->len - 1]))
128 sb->len--;
129 sb->buf[sb->len] = '\0';
130}
131
132void strbuf_trim_trailing_dir_sep(struct strbuf *sb)
133{
134 while (sb->len > 0 && is_dir_sep((unsigned char)sb->buf[sb->len - 1]))
135 sb->len--;
136 sb->buf[sb->len] = '\0';
137}
138
139void strbuf_trim_trailing_newline(struct strbuf *sb)
140{
141 if (sb->len > 0 && sb->buf[sb->len - 1] == '\n') {
142 if (--sb->len > 0 && sb->buf[sb->len - 1] == '\r')
143 --sb->len;
144 sb->buf[sb->len] = '\0';
145 }
146}
147
148void strbuf_ltrim(struct strbuf *sb)
149{
150 char *b = sb->buf;
151 while (sb->len > 0 && isspace(*b)) {
152 b++;
153 sb->len--;
154 }
155 memmove(sb->buf, b, sb->len);
156 sb->buf[sb->len] = '\0';
157}
158
159int strbuf_reencode(struct strbuf *sb, const char *from, const char *to)
160{
161 char *out;
162 size_t len;
163
164 if (same_encoding(from, to))
165 return 0;
166
167 out = reencode_string_len(sb->buf, sb->len, to, from, &len);
168 if (!out)
169 return -1;
170
171 strbuf_attach(sb, out, len, len);
172 return 0;
173}
174
175void strbuf_tolower(struct strbuf *sb)
176{
177 char *p = sb->buf, *end = sb->buf + sb->len;
178 for (; p < end; p++)
179 *p = tolower(*p);
180}
181
182struct strbuf **strbuf_split_buf(const char *str, size_t slen,
183 int terminator, int max)
184{
185 struct strbuf **ret = NULL;
186 size_t nr = 0, alloc = 0;
187 struct strbuf *t;
188
189 while (slen) {
190 int len = slen;
191 if (max <= 0 || nr + 1 < max) {
192 const char *end = memchr(str, terminator, slen);
193 if (end)
194 len = end - str + 1;
195 }
196 t = xmalloc(sizeof(struct strbuf));
197 strbuf_init(t, len);
198 strbuf_add(t, str, len);
199 ALLOC_GROW(ret, nr + 2, alloc);
200 ret[nr++] = t;
201 str += len;
202 slen -= len;
203 }
204 ALLOC_GROW(ret, nr + 1, alloc); /* In case string was empty */
205 ret[nr] = NULL;
206 return ret;
207}
208
209void strbuf_add_separated_string_list(struct strbuf *str,
210 const char *sep,
211 struct string_list *slist)
212{
213 struct string_list_item *item;
214 int sep_needed = 0;
215
216 for_each_string_list_item(item, slist) {
217 if (sep_needed)
218 strbuf_addstr(str, sep);
219 strbuf_addstr(str, item->string);
220 sep_needed = 1;
221 }
222}
223
224void strbuf_list_free(struct strbuf **sbs)
225{
226 struct strbuf **s = sbs;
227
228 if (!s)
229 return;
230 while (*s) {
231 strbuf_release(*s);
232 free(*s++);
233 }
234 free(sbs);
235}
236
237int strbuf_cmp(const struct strbuf *a, const struct strbuf *b)
238{
239 size_t len = a->len < b->len ? a->len: b->len;
240 int cmp = memcmp(a->buf, b->buf, len);
241 if (cmp)
242 return cmp;
243 return a->len < b->len ? -1: a->len != b->len;
244}
245
246void strbuf_splice(struct strbuf *sb, size_t pos, size_t len,
247 const void *data, size_t dlen)
248{
249 if (unsigned_add_overflows(pos, len))
250 die("you want to use way too much memory");
251 if (pos > sb->len)
252 die("`pos' is too far after the end of the buffer");
253 if (pos + len > sb->len)
254 die("`pos + len' is too far after the end of the buffer");
255
256 if (dlen >= len)
257 strbuf_grow(sb, dlen - len);
258 memmove(sb->buf + pos + dlen,
259 sb->buf + pos + len,
260 sb->len - pos - len);
261 memcpy(sb->buf + pos, data, dlen);
262 strbuf_setlen(sb, sb->len + dlen - len);
263}
264
265void strbuf_insert(struct strbuf *sb, size_t pos, const void *data, size_t len)
266{
267 strbuf_splice(sb, pos, 0, data, len);
268}
269
270void strbuf_vinsertf(struct strbuf *sb, size_t pos, const char *fmt, va_list ap)
271{
272 int len, len2;
273 char save;
274 va_list cp;
275
276 if (pos > sb->len)
277 die("`pos' is too far after the end of the buffer");
278 va_copy(cp, ap);
279 len = vsnprintf(sb->buf + sb->len, 0, fmt, cp);
280 va_end(cp);
281 if (len < 0)
282 die(_("unable to format message: %s"), fmt);
283 if (!len)
284 return; /* nothing to do */
285 if (unsigned_add_overflows(sb->len, len))
286 die("you want to use way too much memory");
287 strbuf_grow(sb, len);
288 memmove(sb->buf + pos + len, sb->buf + pos, sb->len - pos);
289 /* vsnprintf() will append a NUL, overwriting one of our characters */
290 save = sb->buf[pos + len];
291 len2 = vsnprintf(sb->buf + pos, len + 1, fmt, ap);
292 sb->buf[pos + len] = save;
293 if (len2 != len)
294 BUG("your vsnprintf is broken (returns inconsistent lengths)");
295 strbuf_setlen(sb, sb->len + len);
296}
297
298void strbuf_insertf(struct strbuf *sb, size_t pos, const char *fmt, ...)
299{
300 va_list ap;
301 va_start(ap, fmt);
302 strbuf_vinsertf(sb, pos, fmt, ap);
303 va_end(ap);
304}
305
306void strbuf_remove(struct strbuf *sb, size_t pos, size_t len)
307{
308 strbuf_splice(sb, pos, len, "", 0);
309}
310
311void strbuf_add(struct strbuf *sb, const void *data, size_t len)
312{
313 strbuf_grow(sb, len);
314 memcpy(sb->buf + sb->len, data, len);
315 strbuf_setlen(sb, sb->len + len);
316}
317
318void strbuf_addstrings(struct strbuf *sb, const char *s, size_t n)
319{
320 size_t len = strlen(s);
321
322 strbuf_grow(sb, st_mult(len, n));
323 for (size_t i = 0; i < n; i++)
324 strbuf_add(sb, s, len);
325}
326
327void strbuf_addbuf(struct strbuf *sb, const struct strbuf *sb2)
328{
329 strbuf_grow(sb, sb2->len);
330 memcpy(sb->buf + sb->len, sb2->buf, sb2->len);
331 strbuf_setlen(sb, sb->len + sb2->len);
332}
333
334const char *strbuf_join_argv(struct strbuf *buf,
335 int argc, const char **argv, char delim)
336{
337 if (!argc)
338 return buf->buf;
339
340 strbuf_addstr(buf, *argv);
341 while (--argc) {
342 strbuf_addch(buf, delim);
343 strbuf_addstr(buf, *(++argv));
344 }
345
346 return buf->buf;
347}
348
349void strbuf_addchars(struct strbuf *sb, int c, size_t n)
350{
351 strbuf_grow(sb, n);
352 memset(sb->buf + sb->len, c, n);
353 strbuf_setlen(sb, sb->len + n);
354}
355
356void strbuf_addf(struct strbuf *sb, const char *fmt, ...)
357{
358 va_list ap;
359 va_start(ap, fmt);
360 strbuf_vaddf(sb, fmt, ap);
361 va_end(ap);
362}
363
364static void add_lines(struct strbuf *out,
365 const char *prefix,
366 const char *buf, size_t size,
367 int space_after_prefix)
368{
369 while (size) {
370 const char *next = memchr(buf, '\n', size);
371 next = next ? (next + 1) : (buf + size);
372
373 strbuf_addstr(out, prefix);
374 if (space_after_prefix && buf[0] != '\n' && buf[0] != '\t')
375 strbuf_addch(out, ' ');
376 strbuf_add(out, buf, next - buf);
377 size -= next - buf;
378 buf = next;
379 }
380 strbuf_complete_line(out);
381}
382
383void strbuf_add_commented_lines(struct strbuf *out, const char *buf,
384 size_t size, const char *comment_prefix)
385{
386 add_lines(out, comment_prefix, buf, size, 1);
387}
388
389void strbuf_commented_addf(struct strbuf *sb, const char *comment_prefix,
390 const char *fmt, ...)
391{
392 va_list params;
393 struct strbuf buf = STRBUF_INIT;
394 int incomplete_line = sb->len && sb->buf[sb->len - 1] != '\n';
395
396 va_start(params, fmt);
397 strbuf_vaddf(&buf, fmt, params);
398 va_end(params);
399
400 strbuf_add_commented_lines(sb, buf.buf, buf.len, comment_prefix);
401 if (incomplete_line)
402 sb->buf[--sb->len] = '\0';
403
404 strbuf_release(&buf);
405}
406
407void strbuf_vaddf(struct strbuf *sb, const char *fmt, va_list ap)
408{
409 int len;
410 va_list cp;
411
412 if (!strbuf_avail(sb))
413 strbuf_grow(sb, 64);
414 va_copy(cp, ap);
415 len = vsnprintf(sb->buf + sb->len, sb->alloc - sb->len, fmt, cp);
416 va_end(cp);
417 if (len < 0)
418 die(_("unable to format message: %s"), fmt);
419 if (len > strbuf_avail(sb)) {
420 strbuf_grow(sb, len);
421 len = vsnprintf(sb->buf + sb->len, sb->alloc - sb->len, fmt, ap);
422 if (len > strbuf_avail(sb))
423 BUG("your vsnprintf is broken (insatiable)");
424 }
425 strbuf_setlen(sb, sb->len + len);
426}
427
428int strbuf_expand_step(struct strbuf *sb, const char **formatp)
429{
430 const char *format = *formatp;
431 const char *percent = strchrnul(format, '%');
432
433 strbuf_add(sb, format, percent - format);
434 if (!*percent)
435 return 0;
436 *formatp = percent + 1;
437 return 1;
438}
439
440size_t strbuf_expand_literal(struct strbuf *sb, const char *placeholder)
441{
442 int ch;
443
444 switch (placeholder[0]) {
445 case 'n': /* newline */
446 strbuf_addch(sb, '\n');
447 return 1;
448 case 'x':
449 /* %x00 == NUL, %x0a == LF, etc. */
450 ch = hex2chr(placeholder + 1);
451 if (ch < 0)
452 return 0;
453 strbuf_addch(sb, ch);
454 return 3;
455 }
456 return 0;
457}
458
459void strbuf_expand_bad_format(const char *format, const char *command)
460{
461 const char *end;
462
463 if (*format != '(')
464 /* TRANSLATORS: The first %s is a command like "ls-tree". */
465 die(_("bad %s format: element '%s' does not start with '('"),
466 command, format);
467
468 end = strchr(format + 1, ')');
469 if (!end)
470 /* TRANSLATORS: The first %s is a command like "ls-tree". */
471 die(_("bad %s format: element '%s' does not end in ')'"),
472 command, format);
473
474 /* TRANSLATORS: %s is a command like "ls-tree". */
475 die(_("bad %s format: %%%.*s"),
476 command, (int)(end - format + 1), format);
477}
478
479void strbuf_addbuf_percentquote(struct strbuf *dst, const struct strbuf *src)
480{
481 size_t i, len = src->len;
482
483 for (i = 0; i < len; i++) {
484 if (src->buf[i] == '%')
485 strbuf_addch(dst, '%');
486 strbuf_addch(dst, src->buf[i]);
487 }
488}
489
490#define URL_UNSAFE_CHARS " <>\"%{}|\\^`:?#[]@!$&'()*+,;="
491
492void strbuf_add_percentencode(struct strbuf *dst, const char *src, int flags)
493{
494 size_t i, len = strlen(src);
495
496 for (i = 0; i < len; i++) {
497 unsigned char ch = src[i];
498 if (ch <= 0x1F || ch >= 0x7F ||
499 (ch == '/' && (flags & STRBUF_ENCODE_SLASH)) ||
500 ((flags & STRBUF_ENCODE_HOST_AND_PORT) ?
501 !isalnum(ch) && !strchr("-.:[]", ch) :
502 !!strchr(URL_UNSAFE_CHARS, ch)))
503 strbuf_addf(dst, "%%%02X", (unsigned char)ch);
504 else
505 strbuf_addch(dst, ch);
506 }
507}
508
509size_t strbuf_fread(struct strbuf *sb, size_t size, FILE *f)
510{
511 size_t res;
512 size_t oldalloc = sb->alloc;
513
514 strbuf_grow(sb, size);
515 res = fread(sb->buf + sb->len, 1, size, f);
516 if (res > 0)
517 strbuf_setlen(sb, sb->len + res);
518 else if (oldalloc == 0)
519 strbuf_release(sb);
520 return res;
521}
522
523ssize_t strbuf_read(struct strbuf *sb, int fd, size_t hint)
524{
525 size_t oldlen = sb->len;
526 size_t oldalloc = sb->alloc;
527
528 strbuf_grow(sb, hint ? hint : 8192);
529 for (;;) {
530 ssize_t want = sb->alloc - sb->len - 1;
531 ssize_t got = read_in_full(fd, sb->buf + sb->len, want);
532
533 if (got < 0) {
534 if (oldalloc == 0)
535 strbuf_release(sb);
536 else
537 strbuf_setlen(sb, oldlen);
538 return -1;
539 }
540 sb->len += got;
541 if (got < want)
542 break;
543 strbuf_grow(sb, 8192);
544 }
545
546 sb->buf[sb->len] = '\0';
547 return sb->len - oldlen;
548}
549
550ssize_t strbuf_read_once(struct strbuf *sb, int fd, size_t hint)
551{
552 size_t oldalloc = sb->alloc;
553 ssize_t cnt;
554
555 strbuf_grow(sb, hint ? hint : 8192);
556 cnt = xread(fd, sb->buf + sb->len, sb->alloc - sb->len - 1);
557 if (cnt > 0)
558 strbuf_setlen(sb, sb->len + cnt);
559 else if (oldalloc == 0)
560 strbuf_release(sb);
561 return cnt;
562}
563
564ssize_t strbuf_write(struct strbuf *sb, FILE *f)
565{
566 return sb->len ? fwrite(sb->buf, 1, sb->len, f) : 0;
567}
568
569#define STRBUF_MAXLINK (2*PATH_MAX)
570
571int strbuf_readlink(struct strbuf *sb, const char *path, size_t hint)
572{
573 size_t oldalloc = sb->alloc;
574
575 if (hint < 32)
576 hint = 32;
577
578 while (hint < STRBUF_MAXLINK) {
579 ssize_t len;
580
581 strbuf_grow(sb, hint);
582 len = readlink(path, sb->buf, hint);
583 if (len < 0) {
584 if (errno != ERANGE)
585 break;
586 } else if (len < hint) {
587 strbuf_setlen(sb, len);
588 return 0;
589 }
590
591 /* .. the buffer was too small - try again */
592 hint *= 2;
593 }
594 if (oldalloc == 0)
595 strbuf_release(sb);
596 return -1;
597}
598
599int strbuf_getcwd(struct strbuf *sb)
600{
601 size_t oldalloc = sb->alloc;
602 size_t guessed_len = 128;
603
604 for (;; guessed_len *= 2) {
605 strbuf_grow(sb, guessed_len);
606 if (getcwd(sb->buf, sb->alloc)) {
607 strbuf_setlen(sb, strlen(sb->buf));
608 return 0;
609 }
610
611 /*
612 * If getcwd(3) is implemented as a syscall that falls
613 * back to a regular lookup using readdir(3) etc. then
614 * we may be able to avoid EACCES by providing enough
615 * space to the syscall as it's not necessarily bound
616 * to the same restrictions as the fallback.
617 */
618 if (errno == EACCES && guessed_len < PATH_MAX)
619 continue;
620
621 if (errno != ERANGE)
622 break;
623 }
624 if (oldalloc == 0)
625 strbuf_release(sb);
626 else
627 strbuf_reset(sb);
628 return -1;
629}
630
631#ifdef HAVE_GETDELIM
632int strbuf_getwholeline(struct strbuf *sb, FILE *fp, int term)
633{
634 ssize_t r;
635
636 if (feof(fp))
637 return EOF;
638
639 strbuf_reset(sb);
640
641 /* Translate slopbuf to NULL, as we cannot call realloc on it */
642 if (!sb->alloc)
643 sb->buf = NULL;
644 errno = 0;
645 r = getdelim(&sb->buf, &sb->alloc, term, fp);
646
647 if (r > 0) {
648 sb->len = r;
649 return 0;
650 }
651 assert(r == -1);
652
653 /*
654 * Normally we would have called xrealloc, which will try to free
655 * memory and recover. But we have no way to tell getdelim() to do so.
656 * Worse, we cannot try to recover ENOMEM ourselves, because we have
657 * no idea how many bytes were read by getdelim.
658 *
659 * Dying here is reasonable. It mirrors what xrealloc would do on
660 * catastrophic memory failure. We skip the opportunity to free pack
661 * memory and retry, but that's unlikely to help for a malloc small
662 * enough to hold a single line of input, anyway.
663 */
664 if (errno == ENOMEM)
665 die("Out of memory, getdelim failed");
666
667 /*
668 * Restore strbuf invariants; if getdelim left us with a NULL pointer,
669 * we can just re-init, but otherwise we should make sure that our
670 * length is empty, and that the result is NUL-terminated.
671 */
672 if (!sb->buf)
673 strbuf_init(sb, 0);
674 else
675 strbuf_reset(sb);
676 return EOF;
677}
678#else
679int strbuf_getwholeline(struct strbuf *sb, FILE *fp, int term)
680{
681 int ch;
682
683 if (feof(fp))
684 return EOF;
685
686 strbuf_reset(sb);
687 flockfile(fp);
688 while ((ch = getc_unlocked(fp)) != EOF) {
689 if (!strbuf_avail(sb))
690 strbuf_grow(sb, 1);
691 sb->buf[sb->len++] = ch;
692 if (ch == term)
693 break;
694 }
695 funlockfile(fp);
696 if (ch == EOF && sb->len == 0)
697 return EOF;
698
699 sb->buf[sb->len] = '\0';
700 return 0;
701}
702#endif
703
704int strbuf_appendwholeline(struct strbuf *sb, FILE *fp, int term)
705{
706 struct strbuf line = STRBUF_INIT;
707 if (strbuf_getwholeline(&line, fp, term)) {
708 strbuf_release(&line);
709 return EOF;
710 }
711 strbuf_addbuf(sb, &line);
712 strbuf_release(&line);
713 return 0;
714}
715
716static int strbuf_getdelim(struct strbuf *sb, FILE *fp, int term)
717{
718 if (strbuf_getwholeline(sb, fp, term))
719 return EOF;
720 if (sb->buf[sb->len - 1] == term)
721 strbuf_setlen(sb, sb->len - 1);
722 return 0;
723}
724
725int strbuf_getdelim_strip_crlf(struct strbuf *sb, FILE *fp, int term)
726{
727 if (strbuf_getwholeline(sb, fp, term))
728 return EOF;
729 if (term == '\n' && sb->buf[sb->len - 1] == '\n') {
730 strbuf_setlen(sb, sb->len - 1);
731 if (sb->len && sb->buf[sb->len - 1] == '\r')
732 strbuf_setlen(sb, sb->len - 1);
733 }
734 return 0;
735}
736
737int strbuf_getline(struct strbuf *sb, FILE *fp)
738{
739 return strbuf_getdelim_strip_crlf(sb, fp, '\n');
740}
741
742int strbuf_getline_lf(struct strbuf *sb, FILE *fp)
743{
744 return strbuf_getdelim(sb, fp, '\n');
745}
746
747int strbuf_getline_nul(struct strbuf *sb, FILE *fp)
748{
749 return strbuf_getdelim(sb, fp, '\0');
750}
751
752int strbuf_getwholeline_fd(struct strbuf *sb, int fd, int term)
753{
754 strbuf_reset(sb);
755
756 while (1) {
757 char ch;
758 ssize_t len = xread(fd, &ch, 1);
759 if (len <= 0)
760 return EOF;
761 strbuf_addch(sb, ch);
762 if (ch == term)
763 break;
764 }
765 return 0;
766}
767
768ssize_t strbuf_read_file(struct strbuf *sb, const char *path, size_t hint)
769{
770 int fd;
771 ssize_t len;
772 int saved_errno;
773
774 fd = open(path, O_RDONLY);
775 if (fd < 0)
776 return -1;
777 len = strbuf_read(sb, fd, hint);
778 saved_errno = errno;
779 close(fd);
780 if (len < 0) {
781 errno = saved_errno;
782 return -1;
783 }
784
785 return len;
786}
787
788void strbuf_add_lines(struct strbuf *out, const char *prefix,
789 const char *buf, size_t size)
790{
791 add_lines(out, prefix, buf, size, 0);
792}
793
794void strbuf_addstr_xml_quoted(struct strbuf *buf, const char *s)
795{
796 while (*s) {
797 size_t len = strcspn(s, "\"<>&");
798 strbuf_add(buf, s, len);
799 s += len;
800 switch (*s) {
801 case '"':
802 strbuf_addstr(buf, """);
803 break;
804 case '<':
805 strbuf_addstr(buf, "<");
806 break;
807 case '>':
808 strbuf_addstr(buf, ">");
809 break;
810 case '&':
811 strbuf_addstr(buf, "&");
812 break;
813 case 0:
814 return;
815 }
816 s++;
817 }
818}
819
820static void strbuf_add_urlencode(struct strbuf *sb, const char *s, size_t len,
821 char_predicate allow_unencoded_fn)
822{
823 strbuf_grow(sb, len);
824 while (len--) {
825 char ch = *s++;
826 if (allow_unencoded_fn(ch))
827 strbuf_addch(sb, ch);
828 else
829 strbuf_addf(sb, "%%%02x", (unsigned char)ch);
830 }
831}
832
833void strbuf_addstr_urlencode(struct strbuf *sb, const char *s,
834 char_predicate allow_unencoded_fn)
835{
836 strbuf_add_urlencode(sb, s, strlen(s), allow_unencoded_fn);
837}
838
839static void strbuf_humanise(struct strbuf *buf, off_t bytes,
840 int humanise_rate)
841{
842 if (bytes > 1 << 30) {
843 strbuf_addf(buf,
844 humanise_rate == 0 ?
845 /* TRANSLATORS: IEC 80000-13:2008 gibibyte */
846 _("%u.%2.2u GiB") :
847 /* TRANSLATORS: IEC 80000-13:2008 gibibyte/second */
848 _("%u.%2.2u GiB/s"),
849 (unsigned)(bytes >> 30),
850 (unsigned)(bytes & ((1 << 30) - 1)) / 10737419);
851 } else if (bytes > 1 << 20) {
852 unsigned x = bytes + 5243; /* for rounding */
853 strbuf_addf(buf,
854 humanise_rate == 0 ?
855 /* TRANSLATORS: IEC 80000-13:2008 mebibyte */
856 _("%u.%2.2u MiB") :
857 /* TRANSLATORS: IEC 80000-13:2008 mebibyte/second */
858 _("%u.%2.2u MiB/s"),
859 x >> 20, ((x & ((1 << 20) - 1)) * 100) >> 20);
860 } else if (bytes > 1 << 10) {
861 unsigned x = bytes + 5; /* for rounding */
862 strbuf_addf(buf,
863 humanise_rate == 0 ?
864 /* TRANSLATORS: IEC 80000-13:2008 kibibyte */
865 _("%u.%2.2u KiB") :
866 /* TRANSLATORS: IEC 80000-13:2008 kibibyte/second */
867 _("%u.%2.2u KiB/s"),
868 x >> 10, ((x & ((1 << 10) - 1)) * 100) >> 10);
869 } else {
870 strbuf_addf(buf,
871 humanise_rate == 0 ?
872 /* TRANSLATORS: IEC 80000-13:2008 byte */
873 Q_("%u byte", "%u bytes", bytes) :
874 /* TRANSLATORS: IEC 80000-13:2008 byte/second */
875 Q_("%u byte/s", "%u bytes/s", bytes),
876 (unsigned)bytes);
877 }
878}
879
880void strbuf_humanise_bytes(struct strbuf *buf, off_t bytes)
881{
882 strbuf_humanise(buf, bytes, 0);
883}
884
885void strbuf_humanise_rate(struct strbuf *buf, off_t bytes)
886{
887 strbuf_humanise(buf, bytes, 1);
888}
889
890int printf_ln(const char *fmt, ...)
891{
892 int ret;
893 va_list ap;
894 va_start(ap, fmt);
895 ret = vprintf(fmt, ap);
896 va_end(ap);
897 if (ret < 0 || putchar('\n') == EOF)
898 return -1;
899 return ret + 1;
900}
901
902int fprintf_ln(FILE *fp, const char *fmt, ...)
903{
904 int ret;
905 va_list ap;
906 va_start(ap, fmt);
907 ret = vfprintf(fp, fmt, ap);
908 va_end(ap);
909 if (ret < 0 || putc('\n', fp) == EOF)
910 return -1;
911 return ret + 1;
912}
913
914char *xstrdup_tolower(const char *string)
915{
916 char *result;
917 size_t len, i;
918
919 len = strlen(string);
920 result = xmallocz(len);
921 for (i = 0; i < len; i++)
922 result[i] = tolower(string[i]);
923 return result;
924}
925
926char *xstrdup_toupper(const char *string)
927{
928 char *result;
929 size_t len, i;
930
931 len = strlen(string);
932 result = xmallocz(len);
933 for (i = 0; i < len; i++)
934 result[i] = toupper(string[i]);
935 return result;
936}
937
938char *xstrvfmt(const char *fmt, va_list ap)
939{
940 struct strbuf buf = STRBUF_INIT;
941 strbuf_vaddf(&buf, fmt, ap);
942 return strbuf_detach(&buf, NULL);
943}
944
945char *xstrfmt(const char *fmt, ...)
946{
947 va_list ap;
948 char *ret;
949
950 va_start(ap, fmt);
951 ret = xstrvfmt(fmt, ap);
952 va_end(ap);
953
954 return ret;
955}
956
957void strbuf_addftime(struct strbuf *sb, const char *fmt, const struct tm *tm,
958 int tz_offset, int suppress_tz_name)
959{
960 struct strbuf munged_fmt = STRBUF_INIT;
961 size_t hint = 128;
962 size_t len;
963
964 if (!*fmt)
965 return;
966
967 /*
968 * There is no portable way to pass timezone information to
969 * strftime, so we handle %z and %Z here. Likewise '%s', because
970 * going back to an epoch time requires knowing the zone.
971 *
972 * Note that tz_offset is in the "[-+]HHMM" decimal form; this is what
973 * we want for %z, but the computation for %s has to convert to number
974 * of seconds.
975 */
976 while (strbuf_expand_step(&munged_fmt, &fmt)) {
977 if (skip_prefix(fmt, "%", &fmt))
978 strbuf_addstr(&munged_fmt, "%%");
979 else if (skip_prefix(fmt, "s", &fmt))
980 strbuf_addf(&munged_fmt, "%"PRItime,
981 (timestamp_t)tm_to_time_t(tm) -
982 3600 * (tz_offset / 100) -
983 60 * (tz_offset % 100));
984 else if (skip_prefix(fmt, "z", &fmt))
985 strbuf_addf(&munged_fmt, "%+05d", tz_offset);
986 else if (suppress_tz_name && skip_prefix(fmt, "Z", &fmt))
987 ; /* nothing */
988 else
989 strbuf_addch(&munged_fmt, '%');
990 }
991 fmt = munged_fmt.buf;
992
993 strbuf_grow(sb, hint);
994 len = strftime(sb->buf + sb->len, sb->alloc - sb->len, fmt, tm);
995
996 if (!len) {
997 /*
998 * strftime reports "0" if it could not fit the result in the buffer.
999 * Unfortunately, it also reports "0" if the requested time string
1000 * takes 0 bytes. So our strategy is to munge the format so that the
1001 * output contains at least one character, and then drop the extra
1002 * character before returning.
1003 */
1004 strbuf_addch(&munged_fmt, ' ');
1005 while (!len) {
1006 hint *= 2;
1007 strbuf_grow(sb, hint);
1008 len = strftime(sb->buf + sb->len, sb->alloc - sb->len,
1009 munged_fmt.buf, tm);
1010 }
1011 len--; /* drop munged space */
1012 }
1013 strbuf_release(&munged_fmt);
1014 strbuf_setlen(sb, sb->len + len);
1015}
1016
1017/*
1018 * Returns the length of a line, without trailing spaces.
1019 *
1020 * If the line ends with newline, it will be removed too.
1021 */
1022static size_t cleanup(char *line, size_t len)
1023{
1024 while (len) {
1025 unsigned char c = line[len - 1];
1026 if (!isspace(c))
1027 break;
1028 len--;
1029 }
1030
1031 return len;
1032}
1033
1034/*
1035 * Remove empty lines from the beginning and end
1036 * and also trailing spaces from every line.
1037 *
1038 * Turn multiple consecutive empty lines between paragraphs
1039 * into just one empty line.
1040 *
1041 * If the input has only empty lines and spaces,
1042 * no output will be produced.
1043 *
1044 * If last line does not have a newline at the end, one is added.
1045 *
1046 * Pass a non-NULL comment_prefix to skip every line starting
1047 * with it.
1048 */
1049void strbuf_stripspace(struct strbuf *sb, const char *comment_prefix)
1050{
1051 size_t empties = 0;
1052 size_t i, j, len, newlen;
1053 char *eol;
1054
1055 /* We may have to add a newline. */
1056 strbuf_grow(sb, 1);
1057
1058 for (i = j = 0; i < sb->len; i += len, j += newlen) {
1059 eol = memchr(sb->buf + i, '\n', sb->len - i);
1060 len = eol ? eol - (sb->buf + i) + 1 : sb->len - i;
1061
1062 if (comment_prefix && len &&
1063 starts_with(sb->buf + i, comment_prefix)) {
1064 newlen = 0;
1065 continue;
1066 }
1067 newlen = cleanup(sb->buf + i, len);
1068
1069 /* Not just an empty line? */
1070 if (newlen) {
1071 if (empties > 0 && j > 0)
1072 sb->buf[j++] = '\n';
1073 empties = 0;
1074 memmove(sb->buf + j, sb->buf + i, newlen);
1075 sb->buf[newlen + j++] = '\n';
1076 } else {
1077 empties++;
1078 }
1079 }
1080
1081 strbuf_setlen(sb, j);
1082}
1083
1084void strbuf_strip_file_from_path(struct strbuf *sb)
1085{
1086 char *path_sep = find_last_dir_sep(sb->buf);
1087 strbuf_setlen(sb, path_sep ? path_sep - sb->buf + 1 : 0);
1088}