describe: fix --no-exact-match
[git.git] / strbuf.c
blob08eec8f1d8b488fe9040b219edae353b4d199077
1 #include "git-compat-util.h"
2 #include "abspath.h"
3 #include "alloc.h"
4 #include "environment.h"
5 #include "gettext.h"
6 #include "hex.h"
7 #include "object-name.h"
8 #include "refs.h"
9 #include "repository.h"
10 #include "string-list.h"
11 #include "utf8.h"
12 #include "date.h"
13 #include "wrapper.h"
15 int starts_with(const char *str, const char *prefix)
17 for (; ; str++, prefix++)
18 if (!*prefix)
19 return 1;
20 else if (*str != *prefix)
21 return 0;
24 int istarts_with(const char *str, const char *prefix)
26 for (; ; str++, prefix++)
27 if (!*prefix)
28 return 1;
29 else if (tolower(*str) != tolower(*prefix))
30 return 0;
33 int skip_to_optional_arg_default(const char *str, const char *prefix,
34 const char **arg, const char *def)
36 const char *p;
38 if (!skip_prefix(str, prefix, &p))
39 return 0;
41 if (!*p) {
42 if (arg)
43 *arg = def;
44 return 1;
47 if (*p != '=')
48 return 0;
50 if (arg)
51 *arg = p + 1;
52 return 1;
56 * Used as the default ->buf value, so that people can always assume
57 * buf is non NULL and ->buf is NUL terminated even for a freshly
58 * initialized strbuf.
60 char strbuf_slopbuf[1];
62 void strbuf_init(struct strbuf *sb, size_t hint)
64 struct strbuf blank = STRBUF_INIT;
65 memcpy(sb, &blank, sizeof(*sb));
66 if (hint)
67 strbuf_grow(sb, hint);
70 void strbuf_release(struct strbuf *sb)
72 if (sb->alloc) {
73 free(sb->buf);
74 strbuf_init(sb, 0);
78 char *strbuf_detach(struct strbuf *sb, size_t *sz)
80 char *res;
81 strbuf_grow(sb, 0);
82 res = sb->buf;
83 if (sz)
84 *sz = sb->len;
85 strbuf_init(sb, 0);
86 return res;
89 void strbuf_attach(struct strbuf *sb, void *buf, size_t len, size_t alloc)
91 strbuf_release(sb);
92 sb->buf = buf;
93 sb->len = len;
94 sb->alloc = alloc;
95 strbuf_grow(sb, 0);
96 sb->buf[sb->len] = '\0';
99 void strbuf_grow(struct strbuf *sb, size_t extra)
101 int new_buf = !sb->alloc;
102 if (unsigned_add_overflows(extra, 1) ||
103 unsigned_add_overflows(sb->len, extra + 1))
104 die("you want to use way too much memory");
105 if (new_buf)
106 sb->buf = NULL;
107 ALLOC_GROW(sb->buf, sb->len + extra + 1, sb->alloc);
108 if (new_buf)
109 sb->buf[0] = '\0';
112 void strbuf_trim(struct strbuf *sb)
114 strbuf_rtrim(sb);
115 strbuf_ltrim(sb);
118 void strbuf_rtrim(struct strbuf *sb)
120 while (sb->len > 0 && isspace((unsigned char)sb->buf[sb->len - 1]))
121 sb->len--;
122 sb->buf[sb->len] = '\0';
125 void strbuf_trim_trailing_dir_sep(struct strbuf *sb)
127 while (sb->len > 0 && is_dir_sep((unsigned char)sb->buf[sb->len - 1]))
128 sb->len--;
129 sb->buf[sb->len] = '\0';
132 void strbuf_trim_trailing_newline(struct strbuf *sb)
134 if (sb->len > 0 && sb->buf[sb->len - 1] == '\n') {
135 if (--sb->len > 0 && sb->buf[sb->len - 1] == '\r')
136 --sb->len;
137 sb->buf[sb->len] = '\0';
141 void strbuf_ltrim(struct strbuf *sb)
143 char *b = sb->buf;
144 while (sb->len > 0 && isspace(*b)) {
145 b++;
146 sb->len--;
148 memmove(sb->buf, b, sb->len);
149 sb->buf[sb->len] = '\0';
152 int strbuf_reencode(struct strbuf *sb, const char *from, const char *to)
154 char *out;
155 size_t len;
157 if (same_encoding(from, to))
158 return 0;
160 out = reencode_string_len(sb->buf, sb->len, to, from, &len);
161 if (!out)
162 return -1;
164 strbuf_attach(sb, out, len, len);
165 return 0;
168 void strbuf_tolower(struct strbuf *sb)
170 char *p = sb->buf, *end = sb->buf + sb->len;
171 for (; p < end; p++)
172 *p = tolower(*p);
175 struct strbuf **strbuf_split_buf(const char *str, size_t slen,
176 int terminator, int max)
178 struct strbuf **ret = NULL;
179 size_t nr = 0, alloc = 0;
180 struct strbuf *t;
182 while (slen) {
183 int len = slen;
184 if (max <= 0 || nr + 1 < max) {
185 const char *end = memchr(str, terminator, slen);
186 if (end)
187 len = end - str + 1;
189 t = xmalloc(sizeof(struct strbuf));
190 strbuf_init(t, len);
191 strbuf_add(t, str, len);
192 ALLOC_GROW(ret, nr + 2, alloc);
193 ret[nr++] = t;
194 str += len;
195 slen -= len;
197 ALLOC_GROW(ret, nr + 1, alloc); /* In case string was empty */
198 ret[nr] = NULL;
199 return ret;
202 void strbuf_add_separated_string_list(struct strbuf *str,
203 const char *sep,
204 struct string_list *slist)
206 struct string_list_item *item;
207 int sep_needed = 0;
209 for_each_string_list_item(item, slist) {
210 if (sep_needed)
211 strbuf_addstr(str, sep);
212 strbuf_addstr(str, item->string);
213 sep_needed = 1;
217 void strbuf_list_free(struct strbuf **sbs)
219 struct strbuf **s = sbs;
221 if (!s)
222 return;
223 while (*s) {
224 strbuf_release(*s);
225 free(*s++);
227 free(sbs);
230 int strbuf_cmp(const struct strbuf *a, const struct strbuf *b)
232 size_t len = a->len < b->len ? a->len: b->len;
233 int cmp = memcmp(a->buf, b->buf, len);
234 if (cmp)
235 return cmp;
236 return a->len < b->len ? -1: a->len != b->len;
239 void strbuf_splice(struct strbuf *sb, size_t pos, size_t len,
240 const void *data, size_t dlen)
242 if (unsigned_add_overflows(pos, len))
243 die("you want to use way too much memory");
244 if (pos > sb->len)
245 die("`pos' is too far after the end of the buffer");
246 if (pos + len > sb->len)
247 die("`pos + len' is too far after the end of the buffer");
249 if (dlen >= len)
250 strbuf_grow(sb, dlen - len);
251 memmove(sb->buf + pos + dlen,
252 sb->buf + pos + len,
253 sb->len - pos - len);
254 memcpy(sb->buf + pos, data, dlen);
255 strbuf_setlen(sb, sb->len + dlen - len);
258 void strbuf_insert(struct strbuf *sb, size_t pos, const void *data, size_t len)
260 strbuf_splice(sb, pos, 0, data, len);
263 void strbuf_vinsertf(struct strbuf *sb, size_t pos, const char *fmt, va_list ap)
265 int len, len2;
266 char save;
267 va_list cp;
269 if (pos > sb->len)
270 die("`pos' is too far after the end of the buffer");
271 va_copy(cp, ap);
272 len = vsnprintf(sb->buf + sb->len, 0, fmt, cp);
273 va_end(cp);
274 if (len < 0)
275 BUG("your vsnprintf is broken (returned %d)", len);
276 if (!len)
277 return; /* nothing to do */
278 if (unsigned_add_overflows(sb->len, len))
279 die("you want to use way too much memory");
280 strbuf_grow(sb, len);
281 memmove(sb->buf + pos + len, sb->buf + pos, sb->len - pos);
282 /* vsnprintf() will append a NUL, overwriting one of our characters */
283 save = sb->buf[pos + len];
284 len2 = vsnprintf(sb->buf + pos, len + 1, fmt, ap);
285 sb->buf[pos + len] = save;
286 if (len2 != len)
287 BUG("your vsnprintf is broken (returns inconsistent lengths)");
288 strbuf_setlen(sb, sb->len + len);
291 void strbuf_insertf(struct strbuf *sb, size_t pos, const char *fmt, ...)
293 va_list ap;
294 va_start(ap, fmt);
295 strbuf_vinsertf(sb, pos, fmt, ap);
296 va_end(ap);
299 void strbuf_remove(struct strbuf *sb, size_t pos, size_t len)
301 strbuf_splice(sb, pos, len, "", 0);
304 void strbuf_add(struct strbuf *sb, const void *data, size_t len)
306 strbuf_grow(sb, len);
307 memcpy(sb->buf + sb->len, data, len);
308 strbuf_setlen(sb, sb->len + len);
311 void strbuf_addbuf(struct strbuf *sb, const struct strbuf *sb2)
313 strbuf_grow(sb, sb2->len);
314 memcpy(sb->buf + sb->len, sb2->buf, sb2->len);
315 strbuf_setlen(sb, sb->len + sb2->len);
318 const char *strbuf_join_argv(struct strbuf *buf,
319 int argc, const char **argv, char delim)
321 if (!argc)
322 return buf->buf;
324 strbuf_addstr(buf, *argv);
325 while (--argc) {
326 strbuf_addch(buf, delim);
327 strbuf_addstr(buf, *(++argv));
330 return buf->buf;
333 void strbuf_addchars(struct strbuf *sb, int c, size_t n)
335 strbuf_grow(sb, n);
336 memset(sb->buf + sb->len, c, n);
337 strbuf_setlen(sb, sb->len + n);
340 void strbuf_addf(struct strbuf *sb, const char *fmt, ...)
342 va_list ap;
343 va_start(ap, fmt);
344 strbuf_vaddf(sb, fmt, ap);
345 va_end(ap);
348 static void add_lines(struct strbuf *out,
349 const char *prefix1,
350 const char *prefix2,
351 const char *buf, size_t size)
353 while (size) {
354 const char *prefix;
355 const char *next = memchr(buf, '\n', size);
356 next = next ? (next + 1) : (buf + size);
358 prefix = ((prefix2 && (buf[0] == '\n' || buf[0] == '\t'))
359 ? prefix2 : prefix1);
360 strbuf_addstr(out, prefix);
361 strbuf_add(out, buf, next - buf);
362 size -= next - buf;
363 buf = next;
365 strbuf_complete_line(out);
368 void strbuf_add_commented_lines(struct strbuf *out, const char *buf, size_t size)
370 static char prefix1[3];
371 static char prefix2[2];
373 if (prefix1[0] != comment_line_char) {
374 xsnprintf(prefix1, sizeof(prefix1), "%c ", comment_line_char);
375 xsnprintf(prefix2, sizeof(prefix2), "%c", comment_line_char);
377 add_lines(out, prefix1, prefix2, buf, size);
380 void strbuf_commented_addf(struct strbuf *sb, const char *fmt, ...)
382 va_list params;
383 struct strbuf buf = STRBUF_INIT;
384 int incomplete_line = sb->len && sb->buf[sb->len - 1] != '\n';
386 va_start(params, fmt);
387 strbuf_vaddf(&buf, fmt, params);
388 va_end(params);
390 strbuf_add_commented_lines(sb, buf.buf, buf.len);
391 if (incomplete_line)
392 sb->buf[--sb->len] = '\0';
394 strbuf_release(&buf);
397 void strbuf_vaddf(struct strbuf *sb, const char *fmt, va_list ap)
399 int len;
400 va_list cp;
402 if (!strbuf_avail(sb))
403 strbuf_grow(sb, 64);
404 va_copy(cp, ap);
405 len = vsnprintf(sb->buf + sb->len, sb->alloc - sb->len, fmt, cp);
406 va_end(cp);
407 if (len < 0)
408 BUG("your vsnprintf is broken (returned %d)", len);
409 if (len > strbuf_avail(sb)) {
410 strbuf_grow(sb, len);
411 len = vsnprintf(sb->buf + sb->len, sb->alloc - sb->len, fmt, ap);
412 if (len > strbuf_avail(sb))
413 BUG("your vsnprintf is broken (insatiable)");
415 strbuf_setlen(sb, sb->len + len);
418 void strbuf_expand(struct strbuf *sb, const char *format, expand_fn_t fn,
419 void *context)
421 for (;;) {
422 const char *percent;
423 size_t consumed;
425 percent = strchrnul(format, '%');
426 strbuf_add(sb, format, percent - format);
427 if (!*percent)
428 break;
429 format = percent + 1;
431 if (*format == '%') {
432 strbuf_addch(sb, '%');
433 format++;
434 continue;
437 consumed = fn(sb, format, context);
438 if (consumed)
439 format += consumed;
440 else
441 strbuf_addch(sb, '%');
445 size_t strbuf_expand_literal_cb(struct strbuf *sb,
446 const char *placeholder,
447 void *context UNUSED)
449 int ch;
451 switch (placeholder[0]) {
452 case 'n': /* newline */
453 strbuf_addch(sb, '\n');
454 return 1;
455 case 'x':
456 /* %x00 == NUL, %x0a == LF, etc. */
457 ch = hex2chr(placeholder + 1);
458 if (ch < 0)
459 return 0;
460 strbuf_addch(sb, ch);
461 return 3;
463 return 0;
466 size_t strbuf_expand_dict_cb(struct strbuf *sb, const char *placeholder,
467 void *context)
469 struct strbuf_expand_dict_entry *e = context;
470 size_t len;
472 for (; e->placeholder && (len = strlen(e->placeholder)); e++) {
473 if (!strncmp(placeholder, e->placeholder, len)) {
474 if (e->value)
475 strbuf_addstr(sb, e->value);
476 return len;
479 return 0;
482 void strbuf_addbuf_percentquote(struct strbuf *dst, const struct strbuf *src)
484 size_t i, len = src->len;
486 for (i = 0; i < len; i++) {
487 if (src->buf[i] == '%')
488 strbuf_addch(dst, '%');
489 strbuf_addch(dst, src->buf[i]);
493 #define URL_UNSAFE_CHARS " <>\"%{}|\\^`:?#[]@!$&'()*+,;="
495 void strbuf_add_percentencode(struct strbuf *dst, const char *src, int flags)
497 size_t i, len = strlen(src);
499 for (i = 0; i < len; i++) {
500 unsigned char ch = src[i];
501 if (ch <= 0x1F || ch >= 0x7F ||
502 (ch == '/' && (flags & STRBUF_ENCODE_SLASH)) ||
503 strchr(URL_UNSAFE_CHARS, ch))
504 strbuf_addf(dst, "%%%02X", (unsigned char)ch);
505 else
506 strbuf_addch(dst, ch);
510 size_t strbuf_fread(struct strbuf *sb, size_t size, FILE *f)
512 size_t res;
513 size_t oldalloc = sb->alloc;
515 strbuf_grow(sb, size);
516 res = fread(sb->buf + sb->len, 1, size, f);
517 if (res > 0)
518 strbuf_setlen(sb, sb->len + res);
519 else if (oldalloc == 0)
520 strbuf_release(sb);
521 return res;
524 ssize_t strbuf_read(struct strbuf *sb, int fd, size_t hint)
526 size_t oldlen = sb->len;
527 size_t oldalloc = sb->alloc;
529 strbuf_grow(sb, hint ? hint : 8192);
530 for (;;) {
531 ssize_t want = sb->alloc - sb->len - 1;
532 ssize_t got = read_in_full(fd, sb->buf + sb->len, want);
534 if (got < 0) {
535 if (oldalloc == 0)
536 strbuf_release(sb);
537 else
538 strbuf_setlen(sb, oldlen);
539 return -1;
541 sb->len += got;
542 if (got < want)
543 break;
544 strbuf_grow(sb, 8192);
547 sb->buf[sb->len] = '\0';
548 return sb->len - oldlen;
551 ssize_t strbuf_read_once(struct strbuf *sb, int fd, size_t hint)
553 size_t oldalloc = sb->alloc;
554 ssize_t cnt;
556 strbuf_grow(sb, hint ? hint : 8192);
557 cnt = xread(fd, sb->buf + sb->len, sb->alloc - sb->len - 1);
558 if (cnt > 0)
559 strbuf_setlen(sb, sb->len + cnt);
560 else if (oldalloc == 0)
561 strbuf_release(sb);
562 return cnt;
565 ssize_t strbuf_write(struct strbuf *sb, FILE *f)
567 return sb->len ? fwrite(sb->buf, 1, sb->len, f) : 0;
570 #define STRBUF_MAXLINK (2*PATH_MAX)
572 int strbuf_readlink(struct strbuf *sb, const char *path, size_t hint)
574 size_t oldalloc = sb->alloc;
576 if (hint < 32)
577 hint = 32;
579 while (hint < STRBUF_MAXLINK) {
580 ssize_t len;
582 strbuf_grow(sb, hint);
583 len = readlink(path, sb->buf, hint);
584 if (len < 0) {
585 if (errno != ERANGE)
586 break;
587 } else if (len < hint) {
588 strbuf_setlen(sb, len);
589 return 0;
592 /* .. the buffer was too small - try again */
593 hint *= 2;
595 if (oldalloc == 0)
596 strbuf_release(sb);
597 return -1;
600 int strbuf_getcwd(struct strbuf *sb)
602 size_t oldalloc = sb->alloc;
603 size_t guessed_len = 128;
605 for (;; guessed_len *= 2) {
606 strbuf_grow(sb, guessed_len);
607 if (getcwd(sb->buf, sb->alloc)) {
608 strbuf_setlen(sb, strlen(sb->buf));
609 return 0;
613 * If getcwd(3) is implemented as a syscall that falls
614 * back to a regular lookup using readdir(3) etc. then
615 * we may be able to avoid EACCES by providing enough
616 * space to the syscall as it's not necessarily bound
617 * to the same restrictions as the fallback.
619 if (errno == EACCES && guessed_len < PATH_MAX)
620 continue;
622 if (errno != ERANGE)
623 break;
625 if (oldalloc == 0)
626 strbuf_release(sb);
627 else
628 strbuf_reset(sb);
629 return -1;
632 #ifdef HAVE_GETDELIM
633 int strbuf_getwholeline(struct strbuf *sb, FILE *fp, int term)
635 ssize_t r;
637 if (feof(fp))
638 return EOF;
640 strbuf_reset(sb);
642 /* Translate slopbuf to NULL, as we cannot call realloc on it */
643 if (!sb->alloc)
644 sb->buf = NULL;
645 errno = 0;
646 r = getdelim(&sb->buf, &sb->alloc, term, fp);
648 if (r > 0) {
649 sb->len = r;
650 return 0;
652 assert(r == -1);
655 * Normally we would have called xrealloc, which will try to free
656 * memory and recover. But we have no way to tell getdelim() to do so.
657 * Worse, we cannot try to recover ENOMEM ourselves, because we have
658 * no idea how many bytes were read by getdelim.
660 * Dying here is reasonable. It mirrors what xrealloc would do on
661 * catastrophic memory failure. We skip the opportunity to free pack
662 * memory and retry, but that's unlikely to help for a malloc small
663 * enough to hold a single line of input, anyway.
665 if (errno == ENOMEM)
666 die("Out of memory, getdelim failed");
669 * Restore strbuf invariants; if getdelim left us with a NULL pointer,
670 * we can just re-init, but otherwise we should make sure that our
671 * length is empty, and that the result is NUL-terminated.
673 if (!sb->buf)
674 strbuf_init(sb, 0);
675 else
676 strbuf_reset(sb);
677 return EOF;
679 #else
680 int strbuf_getwholeline(struct strbuf *sb, FILE *fp, int term)
682 int ch;
684 if (feof(fp))
685 return EOF;
687 strbuf_reset(sb);
688 flockfile(fp);
689 while ((ch = getc_unlocked(fp)) != EOF) {
690 if (!strbuf_avail(sb))
691 strbuf_grow(sb, 1);
692 sb->buf[sb->len++] = ch;
693 if (ch == term)
694 break;
696 funlockfile(fp);
697 if (ch == EOF && sb->len == 0)
698 return EOF;
700 sb->buf[sb->len] = '\0';
701 return 0;
703 #endif
705 int strbuf_appendwholeline(struct strbuf *sb, FILE *fp, int term)
707 struct strbuf line = STRBUF_INIT;
708 if (strbuf_getwholeline(&line, fp, term))
709 return EOF;
710 strbuf_addbuf(sb, &line);
711 strbuf_release(&line);
712 return 0;
715 static int strbuf_getdelim(struct strbuf *sb, FILE *fp, int term)
717 if (strbuf_getwholeline(sb, fp, term))
718 return EOF;
719 if (sb->buf[sb->len - 1] == term)
720 strbuf_setlen(sb, sb->len - 1);
721 return 0;
724 int strbuf_getline(struct strbuf *sb, FILE *fp)
726 if (strbuf_getwholeline(sb, fp, '\n'))
727 return EOF;
728 if (sb->buf[sb->len - 1] == '\n') {
729 strbuf_setlen(sb, sb->len - 1);
730 if (sb->len && sb->buf[sb->len - 1] == '\r')
731 strbuf_setlen(sb, sb->len - 1);
733 return 0;
736 int strbuf_getline_lf(struct strbuf *sb, FILE *fp)
738 return strbuf_getdelim(sb, fp, '\n');
741 int strbuf_getline_nul(struct strbuf *sb, FILE *fp)
743 return strbuf_getdelim(sb, fp, '\0');
746 int strbuf_getwholeline_fd(struct strbuf *sb, int fd, int term)
748 strbuf_reset(sb);
750 while (1) {
751 char ch;
752 ssize_t len = xread(fd, &ch, 1);
753 if (len <= 0)
754 return EOF;
755 strbuf_addch(sb, ch);
756 if (ch == term)
757 break;
759 return 0;
762 ssize_t strbuf_read_file(struct strbuf *sb, const char *path, size_t hint)
764 int fd;
765 ssize_t len;
766 int saved_errno;
768 fd = open(path, O_RDONLY);
769 if (fd < 0)
770 return -1;
771 len = strbuf_read(sb, fd, hint);
772 saved_errno = errno;
773 close(fd);
774 if (len < 0) {
775 errno = saved_errno;
776 return -1;
779 return len;
782 void strbuf_add_lines(struct strbuf *out, const char *prefix,
783 const char *buf, size_t size)
785 add_lines(out, prefix, NULL, buf, size);
788 void strbuf_addstr_xml_quoted(struct strbuf *buf, const char *s)
790 while (*s) {
791 size_t len = strcspn(s, "\"<>&");
792 strbuf_add(buf, s, len);
793 s += len;
794 switch (*s) {
795 case '"':
796 strbuf_addstr(buf, "&quot;");
797 break;
798 case '<':
799 strbuf_addstr(buf, "&lt;");
800 break;
801 case '>':
802 strbuf_addstr(buf, "&gt;");
803 break;
804 case '&':
805 strbuf_addstr(buf, "&amp;");
806 break;
807 case 0:
808 return;
810 s++;
814 int is_rfc3986_reserved_or_unreserved(char ch)
816 if (is_rfc3986_unreserved(ch))
817 return 1;
818 switch (ch) {
819 case '!': case '*': case '\'': case '(': case ')': case ';':
820 case ':': case '@': case '&': case '=': case '+': case '$':
821 case ',': case '/': case '?': case '#': case '[': case ']':
822 return 1;
824 return 0;
827 int is_rfc3986_unreserved(char ch)
829 return isalnum(ch) ||
830 ch == '-' || ch == '_' || ch == '.' || ch == '~';
833 static void strbuf_add_urlencode(struct strbuf *sb, const char *s, size_t len,
834 char_predicate allow_unencoded_fn)
836 strbuf_grow(sb, len);
837 while (len--) {
838 char ch = *s++;
839 if (allow_unencoded_fn(ch))
840 strbuf_addch(sb, ch);
841 else
842 strbuf_addf(sb, "%%%02x", (unsigned char)ch);
846 void strbuf_addstr_urlencode(struct strbuf *sb, const char *s,
847 char_predicate allow_unencoded_fn)
849 strbuf_add_urlencode(sb, s, strlen(s), allow_unencoded_fn);
852 static void strbuf_humanise(struct strbuf *buf, off_t bytes,
853 int humanise_rate)
855 if (bytes > 1 << 30) {
856 strbuf_addf(buf,
857 humanise_rate == 0 ?
858 /* TRANSLATORS: IEC 80000-13:2008 gibibyte */
859 _("%u.%2.2u GiB") :
860 /* TRANSLATORS: IEC 80000-13:2008 gibibyte/second */
861 _("%u.%2.2u GiB/s"),
862 (unsigned)(bytes >> 30),
863 (unsigned)(bytes & ((1 << 30) - 1)) / 10737419);
864 } else if (bytes > 1 << 20) {
865 unsigned x = bytes + 5243; /* for rounding */
866 strbuf_addf(buf,
867 humanise_rate == 0 ?
868 /* TRANSLATORS: IEC 80000-13:2008 mebibyte */
869 _("%u.%2.2u MiB") :
870 /* TRANSLATORS: IEC 80000-13:2008 mebibyte/second */
871 _("%u.%2.2u MiB/s"),
872 x >> 20, ((x & ((1 << 20) - 1)) * 100) >> 20);
873 } else if (bytes > 1 << 10) {
874 unsigned x = bytes + 5; /* for rounding */
875 strbuf_addf(buf,
876 humanise_rate == 0 ?
877 /* TRANSLATORS: IEC 80000-13:2008 kibibyte */
878 _("%u.%2.2u KiB") :
879 /* TRANSLATORS: IEC 80000-13:2008 kibibyte/second */
880 _("%u.%2.2u KiB/s"),
881 x >> 10, ((x & ((1 << 10) - 1)) * 100) >> 10);
882 } else {
883 strbuf_addf(buf,
884 humanise_rate == 0 ?
885 /* TRANSLATORS: IEC 80000-13:2008 byte */
886 Q_("%u byte", "%u bytes", bytes) :
887 /* TRANSLATORS: IEC 80000-13:2008 byte/second */
888 Q_("%u byte/s", "%u bytes/s", bytes),
889 (unsigned)bytes);
893 void strbuf_humanise_bytes(struct strbuf *buf, off_t bytes)
895 strbuf_humanise(buf, bytes, 0);
898 void strbuf_humanise_rate(struct strbuf *buf, off_t bytes)
900 strbuf_humanise(buf, bytes, 1);
903 void strbuf_add_absolute_path(struct strbuf *sb, const char *path)
905 if (!*path)
906 die("The empty string is not a valid path");
907 if (!is_absolute_path(path)) {
908 struct stat cwd_stat, pwd_stat;
909 size_t orig_len = sb->len;
910 char *cwd = xgetcwd();
911 char *pwd = getenv("PWD");
912 if (pwd && strcmp(pwd, cwd) &&
913 !stat(cwd, &cwd_stat) &&
914 (cwd_stat.st_dev || cwd_stat.st_ino) &&
915 !stat(pwd, &pwd_stat) &&
916 pwd_stat.st_dev == cwd_stat.st_dev &&
917 pwd_stat.st_ino == cwd_stat.st_ino)
918 strbuf_addstr(sb, pwd);
919 else
920 strbuf_addstr(sb, cwd);
921 if (sb->len > orig_len && !is_dir_sep(sb->buf[sb->len - 1]))
922 strbuf_addch(sb, '/');
923 free(cwd);
925 strbuf_addstr(sb, path);
928 void strbuf_add_real_path(struct strbuf *sb, const char *path)
930 if (sb->len) {
931 struct strbuf resolved = STRBUF_INIT;
932 strbuf_realpath(&resolved, path, 1);
933 strbuf_addbuf(sb, &resolved);
934 strbuf_release(&resolved);
935 } else
936 strbuf_realpath(sb, path, 1);
939 int printf_ln(const char *fmt, ...)
941 int ret;
942 va_list ap;
943 va_start(ap, fmt);
944 ret = vprintf(fmt, ap);
945 va_end(ap);
946 if (ret < 0 || putchar('\n') == EOF)
947 return -1;
948 return ret + 1;
951 int fprintf_ln(FILE *fp, const char *fmt, ...)
953 int ret;
954 va_list ap;
955 va_start(ap, fmt);
956 ret = vfprintf(fp, fmt, ap);
957 va_end(ap);
958 if (ret < 0 || putc('\n', fp) == EOF)
959 return -1;
960 return ret + 1;
963 char *xstrdup_tolower(const char *string)
965 char *result;
966 size_t len, i;
968 len = strlen(string);
969 result = xmallocz(len);
970 for (i = 0; i < len; i++)
971 result[i] = tolower(string[i]);
972 return result;
975 char *xstrdup_toupper(const char *string)
977 char *result;
978 size_t len, i;
980 len = strlen(string);
981 result = xmallocz(len);
982 for (i = 0; i < len; i++)
983 result[i] = toupper(string[i]);
984 return result;
987 char *xstrvfmt(const char *fmt, va_list ap)
989 struct strbuf buf = STRBUF_INIT;
990 strbuf_vaddf(&buf, fmt, ap);
991 return strbuf_detach(&buf, NULL);
994 char *xstrfmt(const char *fmt, ...)
996 va_list ap;
997 char *ret;
999 va_start(ap, fmt);
1000 ret = xstrvfmt(fmt, ap);
1001 va_end(ap);
1003 return ret;
1006 void strbuf_addftime(struct strbuf *sb, const char *fmt, const struct tm *tm,
1007 int tz_offset, int suppress_tz_name)
1009 struct strbuf munged_fmt = STRBUF_INIT;
1010 size_t hint = 128;
1011 size_t len;
1013 if (!*fmt)
1014 return;
1017 * There is no portable way to pass timezone information to
1018 * strftime, so we handle %z and %Z here. Likewise '%s', because
1019 * going back to an epoch time requires knowing the zone.
1021 * Note that tz_offset is in the "[-+]HHMM" decimal form; this is what
1022 * we want for %z, but the computation for %s has to convert to number
1023 * of seconds.
1025 for (;;) {
1026 const char *percent = strchrnul(fmt, '%');
1027 strbuf_add(&munged_fmt, fmt, percent - fmt);
1028 if (!*percent)
1029 break;
1030 fmt = percent + 1;
1031 switch (*fmt) {
1032 case '%':
1033 strbuf_addstr(&munged_fmt, "%%");
1034 fmt++;
1035 break;
1036 case 's':
1037 strbuf_addf(&munged_fmt, "%"PRItime,
1038 (timestamp_t)tm_to_time_t(tm) -
1039 3600 * (tz_offset / 100) -
1040 60 * (tz_offset % 100));
1041 fmt++;
1042 break;
1043 case 'z':
1044 strbuf_addf(&munged_fmt, "%+05d", tz_offset);
1045 fmt++;
1046 break;
1047 case 'Z':
1048 if (suppress_tz_name) {
1049 fmt++;
1050 break;
1052 /* FALLTHROUGH */
1053 default:
1054 strbuf_addch(&munged_fmt, '%');
1057 fmt = munged_fmt.buf;
1059 strbuf_grow(sb, hint);
1060 len = strftime(sb->buf + sb->len, sb->alloc - sb->len, fmt, tm);
1062 if (!len) {
1064 * strftime reports "0" if it could not fit the result in the buffer.
1065 * Unfortunately, it also reports "0" if the requested time string
1066 * takes 0 bytes. So our strategy is to munge the format so that the
1067 * output contains at least one character, and then drop the extra
1068 * character before returning.
1070 strbuf_addch(&munged_fmt, ' ');
1071 while (!len) {
1072 hint *= 2;
1073 strbuf_grow(sb, hint);
1074 len = strftime(sb->buf + sb->len, sb->alloc - sb->len,
1075 munged_fmt.buf, tm);
1077 len--; /* drop munged space */
1079 strbuf_release(&munged_fmt);
1080 strbuf_setlen(sb, sb->len + len);
1083 void strbuf_repo_add_unique_abbrev(struct strbuf *sb, struct repository *repo,
1084 const struct object_id *oid, int abbrev_len)
1086 int r;
1087 strbuf_grow(sb, GIT_MAX_HEXSZ + 1);
1088 r = repo_find_unique_abbrev_r(repo, sb->buf + sb->len, oid, abbrev_len);
1089 strbuf_setlen(sb, sb->len + r);
1092 void strbuf_add_unique_abbrev(struct strbuf *sb, const struct object_id *oid,
1093 int abbrev_len)
1095 strbuf_repo_add_unique_abbrev(sb, the_repository, oid, abbrev_len);
1099 * Returns the length of a line, without trailing spaces.
1101 * If the line ends with newline, it will be removed too.
1103 static size_t cleanup(char *line, size_t len)
1105 while (len) {
1106 unsigned char c = line[len - 1];
1107 if (!isspace(c))
1108 break;
1109 len--;
1112 return len;
1116 * Remove empty lines from the beginning and end
1117 * and also trailing spaces from every line.
1119 * Turn multiple consecutive empty lines between paragraphs
1120 * into just one empty line.
1122 * If the input has only empty lines and spaces,
1123 * no output will be produced.
1125 * If last line does not have a newline at the end, one is added.
1127 * Enable skip_comments to skip every line starting with comment
1128 * character.
1130 void strbuf_stripspace(struct strbuf *sb, int skip_comments)
1132 size_t empties = 0;
1133 size_t i, j, len, newlen;
1134 char *eol;
1136 /* We may have to add a newline. */
1137 strbuf_grow(sb, 1);
1139 for (i = j = 0; i < sb->len; i += len, j += newlen) {
1140 eol = memchr(sb->buf + i, '\n', sb->len - i);
1141 len = eol ? eol - (sb->buf + i) + 1 : sb->len - i;
1143 if (skip_comments && len && sb->buf[i] == comment_line_char) {
1144 newlen = 0;
1145 continue;
1147 newlen = cleanup(sb->buf + i, len);
1149 /* Not just an empty line? */
1150 if (newlen) {
1151 if (empties > 0 && j > 0)
1152 sb->buf[j++] = '\n';
1153 empties = 0;
1154 memmove(sb->buf + j, sb->buf + i, newlen);
1155 sb->buf[newlen + j++] = '\n';
1156 } else {
1157 empties++;
1161 strbuf_setlen(sb, j);
1164 int strbuf_normalize_path(struct strbuf *src)
1166 struct strbuf dst = STRBUF_INIT;
1168 strbuf_grow(&dst, src->len);
1169 if (normalize_path_copy(dst.buf, src->buf) < 0) {
1170 strbuf_release(&dst);
1171 return -1;
1175 * normalize_path does not tell us the new length, so we have to
1176 * compute it by looking for the new NUL it placed
1178 strbuf_setlen(&dst, strlen(dst.buf));
1179 strbuf_swap(src, &dst);
1180 strbuf_release(&dst);
1181 return 0;
1184 void strbuf_strip_file_from_path(struct strbuf *sb)
1186 char *path_sep = find_last_dir_sep(sb->buf);
1187 strbuf_setlen(sb, path_sep ? path_sep - sb->buf + 1 : 0);