3 #include "string-list.h"
6 int starts_with(const char *str, const char *prefix)
8 for (; ; str++, prefix++)
11 else if (*str != *prefix)
15 int istarts_with(const char *str, const char *prefix)
17 for (; ; str++, prefix++)
20 else if (tolower(*str) != tolower(*prefix))
24 int skip_to_optional_arg_default(const char *str, const char *prefix,
25 const char **arg, const char *def)
29 if (!skip_prefix(str, prefix, &p))
47 * Used as the default ->buf value, so that people can always assume
48 * buf is non NULL and ->buf is NUL terminated even for a freshly
51 char strbuf_slopbuf[1];
53 void strbuf_init(struct strbuf *sb, size_t hint)
55 sb->alloc = sb->len = 0;
56 sb->buf = strbuf_slopbuf;
58 strbuf_grow(sb, hint);
61 void strbuf_release(struct strbuf *sb)
69 char *strbuf_detach(struct strbuf *sb, size_t *sz)
80 void strbuf_attach(struct strbuf *sb, void *buf, size_t len, size_t alloc)
87 sb->buf[sb->len] = '\0';
90 void strbuf_grow(struct strbuf *sb, size_t extra)
92 int new_buf = !sb->alloc;
93 if (unsigned_add_overflows(extra, 1) ||
94 unsigned_add_overflows(sb->len, extra + 1))
95 die("you want to use way too much memory");
98 ALLOC_GROW(sb->buf, sb->len + extra + 1, sb->alloc);
103 void strbuf_trim(struct strbuf *sb)
109 void strbuf_rtrim(struct strbuf *sb)
111 while (sb->len > 0 && isspace((unsigned char)sb->buf[sb->len - 1]))
113 sb->buf[sb->len] = '\0';
116 void strbuf_trim_trailing_dir_sep(struct strbuf *sb)
118 while (sb->len > 0 && is_dir_sep((unsigned char)sb->buf[sb->len - 1]))
120 sb->buf[sb->len] = '\0';
123 void strbuf_trim_trailing_newline(struct strbuf *sb)
125 if (sb->len > 0 && sb->buf[sb->len - 1] == '\n') {
126 if (--sb->len > 0 && sb->buf[sb->len - 1] == '\r')
128 sb->buf[sb->len] = '\0';
132 void strbuf_ltrim(struct strbuf *sb)
135 while (sb->len > 0 && isspace(*b)) {
139 memmove(sb->buf, b, sb->len);
140 sb->buf[sb->len] = '\0';
143 int strbuf_reencode(struct strbuf *sb, const char *from, const char *to)
148 if (same_encoding(from, to))
151 out = reencode_string_len(sb->buf, sb->len, to, from, &len);
155 strbuf_attach(sb, out, len, len);
159 void strbuf_tolower(struct strbuf *sb)
161 char *p = sb->buf, *end = sb->buf + sb->len;
166 struct strbuf **strbuf_split_buf(const char *str, size_t slen,
167 int terminator, int max)
169 struct strbuf **ret = NULL;
170 size_t nr = 0, alloc = 0;
175 if (max <= 0 || nr + 1 < max) {
176 const char *end = memchr(str, terminator, slen);
180 t = xmalloc(sizeof(struct strbuf));
182 strbuf_add(t, str, len);
183 ALLOC_GROW(ret, nr + 2, alloc);
188 ALLOC_GROW(ret, nr + 1, alloc); /* In case string was empty */
193 void strbuf_add_separated_string_list(struct strbuf *str,
195 struct string_list *slist)
197 struct string_list_item *item;
200 for_each_string_list_item(item, slist) {
202 strbuf_addstr(str, sep);
203 strbuf_addstr(str, item->string);
208 void strbuf_list_free(struct strbuf **sbs)
210 struct strbuf **s = sbs;
219 int strbuf_cmp(const struct strbuf *a, const struct strbuf *b)
221 size_t len = a->len < b->len ? a->len: b->len;
222 int cmp = memcmp(a->buf, b->buf, len);
225 return a->len < b->len ? -1: a->len != b->len;
228 void strbuf_splice(struct strbuf *sb, size_t pos, size_t len,
229 const void *data, size_t dlen)
231 if (unsigned_add_overflows(pos, len))
232 die("you want to use way too much memory");
234 die("`pos' is too far after the end of the buffer");
235 if (pos + len > sb->len)
236 die("`pos + len' is too far after the end of the buffer");
239 strbuf_grow(sb, dlen - len);
240 memmove(sb->buf + pos + dlen,
242 sb->len - pos - len);
243 memcpy(sb->buf + pos, data, dlen);
244 strbuf_setlen(sb, sb->len + dlen - len);
247 void strbuf_insert(struct strbuf *sb, size_t pos, const void *data, size_t len)
249 strbuf_splice(sb, pos, 0, data, len);
252 void strbuf_vinsertf(struct strbuf *sb, size_t pos, const char *fmt, va_list ap)
259 die("`pos' is too far after the end of the buffer");
261 len = vsnprintf(sb->buf + sb->len, 0, fmt, cp);
264 BUG("your vsnprintf is broken (returned %d)", len);
266 return; /* nothing to do */
267 if (unsigned_add_overflows(sb->len, len))
268 die("you want to use way too much memory");
269 strbuf_grow(sb, len);
270 memmove(sb->buf + pos + len, sb->buf + pos, sb->len - pos);
271 /* vsnprintf() will append a NUL, overwriting one of our characters */
272 save = sb->buf[pos + len];
273 len2 = vsnprintf(sb->buf + pos, len + 1, fmt, ap);
274 sb->buf[pos + len] = save;
276 BUG("your vsnprintf is broken (returns inconsistent lengths)");
277 strbuf_setlen(sb, sb->len + len);
280 void strbuf_insertf(struct strbuf *sb, size_t pos, const char *fmt, ...)
284 strbuf_vinsertf(sb, pos, fmt, ap);
288 void strbuf_remove(struct strbuf *sb, size_t pos, size_t len)
290 strbuf_splice(sb, pos, len, "", 0);
293 void strbuf_add(struct strbuf *sb, const void *data, size_t len)
295 strbuf_grow(sb, len);
296 memcpy(sb->buf + sb->len, data, len);
297 strbuf_setlen(sb, sb->len + len);
300 void strbuf_addbuf(struct strbuf *sb, const struct strbuf *sb2)
302 strbuf_grow(sb, sb2->len);
303 memcpy(sb->buf + sb->len, sb2->buf, sb2->len);
304 strbuf_setlen(sb, sb->len + sb2->len);
307 const char *strbuf_join_argv(struct strbuf *buf,
308 int argc, const char **argv, char delim)
313 strbuf_addstr(buf, *argv);
315 strbuf_addch(buf, delim);
316 strbuf_addstr(buf, *(++argv));
322 void strbuf_addchars(struct strbuf *sb, int c, size_t n)
325 memset(sb->buf + sb->len, c, n);
326 strbuf_setlen(sb, sb->len + n);
329 void strbuf_addf(struct strbuf *sb, const char *fmt, ...)
333 strbuf_vaddf(sb, fmt, ap);
337 static void add_lines(struct strbuf *out,
340 const char *buf, size_t size)
344 const char *next = memchr(buf, '\n', size);
345 next = next ? (next + 1) : (buf + size);
347 prefix = ((prefix2 && (buf[0] == '\n' || buf[0] == '\t'))
348 ? prefix2 : prefix1);
349 strbuf_addstr(out, prefix);
350 strbuf_add(out, buf, next - buf);
354 strbuf_complete_line(out);
357 void strbuf_add_commented_lines(struct strbuf *out, const char *buf, size_t size)
359 static char prefix1[3];
360 static char prefix2[2];
362 if (prefix1[0] != comment_line_char) {
363 xsnprintf(prefix1, sizeof(prefix1), "%c ", comment_line_char);
364 xsnprintf(prefix2, sizeof(prefix2), "%c", comment_line_char);
366 add_lines(out, prefix1, prefix2, buf, size);
369 void strbuf_commented_addf(struct strbuf *sb, const char *fmt, ...)
372 struct strbuf buf = STRBUF_INIT;
373 int incomplete_line = sb->len && sb->buf[sb->len - 1] != '\n';
375 va_start(params, fmt);
376 strbuf_vaddf(&buf, fmt, params);
379 strbuf_add_commented_lines(sb, buf.buf, buf.len);
381 sb->buf[--sb->len] = '\0';
383 strbuf_release(&buf);
386 void strbuf_vaddf(struct strbuf *sb, const char *fmt, va_list ap)
391 if (!strbuf_avail(sb))
394 len = vsnprintf(sb->buf + sb->len, sb->alloc - sb->len, fmt, cp);
397 BUG("your vsnprintf is broken (returned %d)", len);
398 if (len > strbuf_avail(sb)) {
399 strbuf_grow(sb, len);
400 len = vsnprintf(sb->buf + sb->len, sb->alloc - sb->len, fmt, ap);
401 if (len > strbuf_avail(sb))
402 BUG("your vsnprintf is broken (insatiable)");
404 strbuf_setlen(sb, sb->len + len);
407 void strbuf_expand(struct strbuf *sb, const char *format, expand_fn_t fn,
414 percent = strchrnul(format, '%');
415 strbuf_add(sb, format, percent - format);
418 format = percent + 1;
420 if (*format == '%') {
421 strbuf_addch(sb, '%');
426 consumed = fn(sb, format, context);
430 strbuf_addch(sb, '%');
434 size_t strbuf_expand_literal_cb(struct strbuf *sb,
435 const char *placeholder,
440 switch (placeholder[0]) {
441 case 'n': /* newline */
442 strbuf_addch(sb, '\n');
445 /* %x00 == NUL, %x0a == LF, etc. */
446 ch = hex2chr(placeholder + 1);
449 strbuf_addch(sb, ch);
455 size_t strbuf_expand_dict_cb(struct strbuf *sb, const char *placeholder,
458 struct strbuf_expand_dict_entry *e = context;
461 for (; e->placeholder && (len = strlen(e->placeholder)); e++) {
462 if (!strncmp(placeholder, e->placeholder, len)) {
464 strbuf_addstr(sb, e->value);
471 void strbuf_addbuf_percentquote(struct strbuf *dst, const struct strbuf *src)
473 size_t i, len = src->len;
475 for (i = 0; i < len; i++) {
476 if (src->buf[i] == '%')
477 strbuf_addch(dst, '%');
478 strbuf_addch(dst, src->buf[i]);
482 size_t strbuf_fread(struct strbuf *sb, size_t size, FILE *f)
485 size_t oldalloc = sb->alloc;
487 strbuf_grow(sb, size);
488 res = fread(sb->buf + sb->len, 1, size, f);
490 strbuf_setlen(sb, sb->len + res);
491 else if (oldalloc == 0)
496 ssize_t strbuf_read(struct strbuf *sb, int fd, size_t hint)
498 size_t oldlen = sb->len;
499 size_t oldalloc = sb->alloc;
501 strbuf_grow(sb, hint ? hint : 8192);
503 ssize_t want = sb->alloc - sb->len - 1;
504 ssize_t got = read_in_full(fd, sb->buf + sb->len, want);
510 strbuf_setlen(sb, oldlen);
516 strbuf_grow(sb, 8192);
519 sb->buf[sb->len] = '\0';
520 return sb->len - oldlen;
523 ssize_t strbuf_read_once(struct strbuf *sb, int fd, size_t hint)
525 size_t oldalloc = sb->alloc;
528 strbuf_grow(sb, hint ? hint : 8192);
529 cnt = xread(fd, sb->buf + sb->len, sb->alloc - sb->len - 1);
531 strbuf_setlen(sb, sb->len + cnt);
532 else if (oldalloc == 0)
537 ssize_t strbuf_write(struct strbuf *sb, FILE *f)
539 return sb->len ? fwrite(sb->buf, 1, sb->len, f) : 0;
543 #define STRBUF_MAXLINK (2*PATH_MAX)
545 int strbuf_readlink(struct strbuf *sb, const char *path, size_t hint)
547 size_t oldalloc = sb->alloc;
552 while (hint < STRBUF_MAXLINK) {
555 strbuf_grow(sb, hint);
556 len = readlink(path, sb->buf, hint);
560 } else if (len < hint) {
561 strbuf_setlen(sb, len);
565 /* .. the buffer was too small - try again */
573 int strbuf_getcwd(struct strbuf *sb)
575 size_t oldalloc = sb->alloc;
576 size_t guessed_len = 128;
578 for (;; guessed_len *= 2) {
579 strbuf_grow(sb, guessed_len);
580 if (getcwd(sb->buf, sb->alloc)) {
581 strbuf_setlen(sb, strlen(sb->buf));
586 * If getcwd(3) is implemented as a syscall that falls
587 * back to a regular lookup using readdir(3) etc. then
588 * we may be able to avoid EACCES by providing enough
589 * space to the syscall as it's not necessarily bound
590 * to the same restrictions as the fallback.
592 if (errno == EACCES && guessed_len < PATH_MAX)
606 int strbuf_getwholeline(struct strbuf *sb, FILE *fp, int term)
615 /* Translate slopbuf to NULL, as we cannot call realloc on it */
619 r = getdelim(&sb->buf, &sb->alloc, term, fp);
628 * Normally we would have called xrealloc, which will try to free
629 * memory and recover. But we have no way to tell getdelim() to do so.
630 * Worse, we cannot try to recover ENOMEM ourselves, because we have
631 * no idea how many bytes were read by getdelim.
633 * Dying here is reasonable. It mirrors what xrealloc would do on
634 * catastrophic memory failure. We skip the opportunity to free pack
635 * memory and retry, but that's unlikely to help for a malloc small
636 * enough to hold a single line of input, anyway.
639 die("Out of memory, getdelim failed");
642 * Restore strbuf invariants; if getdelim left us with a NULL pointer,
643 * we can just re-init, but otherwise we should make sure that our
644 * length is empty, and that the result is NUL-terminated.
653 int strbuf_getwholeline(struct strbuf *sb, FILE *fp, int term)
662 while ((ch = getc_unlocked(fp)) != EOF) {
663 if (!strbuf_avail(sb))
665 sb->buf[sb->len++] = ch;
670 if (ch == EOF && sb->len == 0)
673 sb->buf[sb->len] = '\0';
678 static int strbuf_getdelim(struct strbuf *sb, FILE *fp, int term)
680 if (strbuf_getwholeline(sb, fp, term))
682 if (sb->buf[sb->len - 1] == term)
683 strbuf_setlen(sb, sb->len - 1);
687 int strbuf_getline(struct strbuf *sb, FILE *fp)
689 if (strbuf_getwholeline(sb, fp, '\n'))
691 if (sb->buf[sb->len - 1] == '\n') {
692 strbuf_setlen(sb, sb->len - 1);
693 if (sb->len && sb->buf[sb->len - 1] == '\r')
694 strbuf_setlen(sb, sb->len - 1);
699 int strbuf_getline_lf(struct strbuf *sb, FILE *fp)
701 return strbuf_getdelim(sb, fp, '\n');
704 int strbuf_getline_nul(struct strbuf *sb, FILE *fp)
706 return strbuf_getdelim(sb, fp, '\0');
709 int strbuf_getwholeline_fd(struct strbuf *sb, int fd, int term)
715 ssize_t len = xread(fd, &ch, 1);
718 strbuf_addch(sb, ch);
725 ssize_t strbuf_read_file(struct strbuf *sb, const char *path, size_t hint)
731 fd = open(path, O_RDONLY);
734 len = strbuf_read(sb, fd, hint);
745 void strbuf_add_lines(struct strbuf *out, const char *prefix,
746 const char *buf, size_t size)
748 add_lines(out, prefix, NULL, buf, size);
751 void strbuf_addstr_xml_quoted(struct strbuf *buf, const char *s)
754 size_t len = strcspn(s, "\"<>&");
755 strbuf_add(buf, s, len);
759 strbuf_addstr(buf, """);
762 strbuf_addstr(buf, "<");
765 strbuf_addstr(buf, ">");
768 strbuf_addstr(buf, "&");
777 static int is_rfc3986_reserved(char ch)
780 case '!': case '*': case '\'': case '(': case ')': case ';':
781 case ':': case '@': case '&': case '=': case '+': case '$':
782 case ',': case '/': case '?': case '#': case '[': case ']':
788 static int is_rfc3986_unreserved(char ch)
790 return isalnum(ch) ||
791 ch == '-' || ch == '_' || ch == '.' || ch == '~';
794 static void strbuf_add_urlencode(struct strbuf *sb, const char *s, size_t len,
797 strbuf_grow(sb, len);
800 if (is_rfc3986_unreserved(ch) ||
801 (!reserved && is_rfc3986_reserved(ch)))
802 strbuf_addch(sb, ch);
804 strbuf_addf(sb, "%%%02x", (unsigned char)ch);
808 void strbuf_addstr_urlencode(struct strbuf *sb, const char *s,
811 strbuf_add_urlencode(sb, s, strlen(s), reserved);
814 static void strbuf_humanise(struct strbuf *buf, off_t bytes,
817 if (bytes > 1 << 30) {
820 /* TRANSLATORS: IEC 80000-13:2008 gibibyte */
822 /* TRANSLATORS: IEC 80000-13:2008 gibibyte/second */
824 (unsigned)(bytes >> 30),
825 (unsigned)(bytes & ((1 << 30) - 1)) / 10737419);
826 } else if (bytes > 1 << 20) {
827 unsigned x = bytes + 5243; /* for rounding */
830 /* TRANSLATORS: IEC 80000-13:2008 mebibyte */
832 /* TRANSLATORS: IEC 80000-13:2008 mebibyte/second */
834 x >> 20, ((x & ((1 << 20) - 1)) * 100) >> 20);
835 } else if (bytes > 1 << 10) {
836 unsigned x = bytes + 5; /* for rounding */
839 /* TRANSLATORS: IEC 80000-13:2008 kibibyte */
841 /* TRANSLATORS: IEC 80000-13:2008 kibibyte/second */
843 x >> 10, ((x & ((1 << 10) - 1)) * 100) >> 10);
847 /* TRANSLATORS: IEC 80000-13:2008 byte */
848 Q_("%u byte", "%u bytes", (unsigned)bytes) :
849 /* TRANSLATORS: IEC 80000-13:2008 byte/second */
850 Q_("%u byte/s", "%u bytes/s", (unsigned)bytes),
855 void strbuf_humanise_bytes(struct strbuf *buf, off_t bytes)
857 strbuf_humanise(buf, bytes, 0);
860 void strbuf_humanise_rate(struct strbuf *buf, off_t bytes)
862 strbuf_humanise(buf, bytes, 1);
865 void strbuf_add_absolute_path(struct strbuf *sb, const char *path)
868 die("The empty string is not a valid path");
869 if (!is_absolute_path(path)) {
870 struct stat cwd_stat, pwd_stat;
871 size_t orig_len = sb->len;
872 char *cwd = xgetcwd();
873 char *pwd = getenv("PWD");
874 if (pwd && strcmp(pwd, cwd) &&
875 !stat(cwd, &cwd_stat) &&
876 (cwd_stat.st_dev || cwd_stat.st_ino) &&
877 !stat(pwd, &pwd_stat) &&
878 pwd_stat.st_dev == cwd_stat.st_dev &&
879 pwd_stat.st_ino == cwd_stat.st_ino)
880 strbuf_addstr(sb, pwd);
882 strbuf_addstr(sb, cwd);
883 if (sb->len > orig_len && !is_dir_sep(sb->buf[sb->len - 1]))
884 strbuf_addch(sb, '/');
887 strbuf_addstr(sb, path);
890 void strbuf_add_real_path(struct strbuf *sb, const char *path)
893 struct strbuf resolved = STRBUF_INIT;
894 strbuf_realpath(&resolved, path, 1);
895 strbuf_addbuf(sb, &resolved);
896 strbuf_release(&resolved);
898 strbuf_realpath(sb, path, 1);
901 int printf_ln(const char *fmt, ...)
906 ret = vprintf(fmt, ap);
908 if (ret < 0 || putchar('\n') == EOF)
913 int fprintf_ln(FILE *fp, const char *fmt, ...)
918 ret = vfprintf(fp, fmt, ap);
920 if (ret < 0 || putc('\n', fp) == EOF)
925 char *xstrdup_tolower(const char *string)
930 len = strlen(string);
931 result = xmallocz(len);
932 for (i = 0; i < len; i++)
933 result[i] = tolower(string[i]);
937 char *xstrdup_toupper(const char *string)
942 len = strlen(string);
943 result = xmallocz(len);
944 for (i = 0; i < len; i++)
945 result[i] = toupper(string[i]);
949 char *xstrvfmt(const char *fmt, va_list ap)
951 struct strbuf buf = STRBUF_INIT;
952 strbuf_vaddf(&buf, fmt, ap);
953 return strbuf_detach(&buf, NULL);
956 char *xstrfmt(const char *fmt, ...)
962 ret = xstrvfmt(fmt, ap);
968 void strbuf_addftime(struct strbuf *sb, const char *fmt, const struct tm *tm,
969 int tz_offset, int suppress_tz_name)
971 struct strbuf munged_fmt = STRBUF_INIT;
979 * There is no portable way to pass timezone information to
980 * strftime, so we handle %z and %Z here.
983 const char *percent = strchrnul(fmt, '%');
984 strbuf_add(&munged_fmt, fmt, percent - fmt);
990 strbuf_addstr(&munged_fmt, "%%");
994 strbuf_addf(&munged_fmt, "%+05d", tz_offset);
998 if (suppress_tz_name) {
1004 strbuf_addch(&munged_fmt, '%');
1007 fmt = munged_fmt.buf;
1009 strbuf_grow(sb, hint);
1010 len = strftime(sb->buf + sb->len, sb->alloc - sb->len, fmt, tm);
1014 * strftime reports "0" if it could not fit the result in the buffer.
1015 * Unfortunately, it also reports "0" if the requested time string
1016 * takes 0 bytes. So our strategy is to munge the format so that the
1017 * output contains at least one character, and then drop the extra
1018 * character before returning.
1020 strbuf_addch(&munged_fmt, ' ');
1023 strbuf_grow(sb, hint);
1024 len = strftime(sb->buf + sb->len, sb->alloc - sb->len,
1025 munged_fmt.buf, tm);
1027 len--; /* drop munged space */
1029 strbuf_release(&munged_fmt);
1030 strbuf_setlen(sb, sb->len + len);
1033 void strbuf_add_unique_abbrev(struct strbuf *sb, const struct object_id *oid,
1037 strbuf_grow(sb, GIT_MAX_HEXSZ + 1);
1038 r = find_unique_abbrev_r(sb->buf + sb->len, oid, abbrev_len);
1039 strbuf_setlen(sb, sb->len + r);
1043 * Returns the length of a line, without trailing spaces.
1045 * If the line ends with newline, it will be removed too.
1047 static size_t cleanup(char *line, size_t len)
1050 unsigned char c = line[len - 1];
1060 * Remove empty lines from the beginning and end
1061 * and also trailing spaces from every line.
1063 * Turn multiple consecutive empty lines between paragraphs
1064 * into just one empty line.
1066 * If the input has only empty lines and spaces,
1067 * no output will be produced.
1069 * If last line does not have a newline at the end, one is added.
1071 * Enable skip_comments to skip every line starting with comment
1074 void strbuf_stripspace(struct strbuf *sb, int skip_comments)
1077 size_t i, j, len, newlen;
1080 /* We may have to add a newline. */
1083 for (i = j = 0; i < sb->len; i += len, j += newlen) {
1084 eol = memchr(sb->buf + i, '\n', sb->len - i);
1085 len = eol ? eol - (sb->buf + i) + 1 : sb->len - i;
1087 if (skip_comments && len && sb->buf[i] == comment_line_char) {
1091 newlen = cleanup(sb->buf + i, len);
1093 /* Not just an empty line? */
1095 if (empties > 0 && j > 0)
1096 sb->buf[j++] = '\n';
1098 memmove(sb->buf + j, sb->buf + i, newlen);
1099 sb->buf[newlen + j++] = '\n';
1105 strbuf_setlen(sb, j);
1108 int strbuf_normalize_path(struct strbuf *src)
1110 struct strbuf dst = STRBUF_INIT;
1112 strbuf_grow(&dst, src->len);
1113 if (normalize_path_copy(dst.buf, src->buf) < 0) {
1114 strbuf_release(&dst);
1119 * normalize_path does not tell us the new length, so we have to
1120 * compute it by looking for the new NUL it placed
1122 strbuf_setlen(&dst, strlen(dst.buf));
1123 strbuf_swap(src, &dst);
1124 strbuf_release(&dst);