4 int prefixcmp(const char *str, const char *prefix)
6 for (; ; str++, prefix++)
9 else if (*str != *prefix)
10 return (unsigned char)*prefix - (unsigned char)*str;
14 * Used as the default ->buf value, so that people can always assume
15 * buf is non NULL and ->buf is NUL terminated even for a freshly
18 char strbuf_slopbuf[1];
20 void strbuf_init(struct strbuf *sb, size_t hint)
22 sb->alloc = sb->len = 0;
23 sb->buf = strbuf_slopbuf;
25 strbuf_grow(sb, hint);
28 void strbuf_release(struct strbuf *sb)
36 char *strbuf_detach(struct strbuf *sb, size_t *sz)
38 char *res = sb->alloc ? sb->buf : NULL;
45 void strbuf_attach(struct strbuf *sb, void *buf, size_t len, size_t alloc)
52 sb->buf[sb->len] = '\0';
55 void strbuf_grow(struct strbuf *sb, size_t extra)
57 if (sb->len + extra + 1 <= sb->len)
58 die("you want to use way too much memory");
61 ALLOC_GROW(sb->buf, sb->len + extra + 1, sb->alloc);
64 void strbuf_trim(struct strbuf *sb)
67 while (sb->len > 0 && isspace((unsigned char)sb->buf[sb->len - 1]))
69 while (sb->len > 0 && isspace(*b)) {
73 memmove(sb->buf, b, sb->len);
74 sb->buf[sb->len] = '\0';
76 void strbuf_rtrim(struct strbuf *sb)
78 while (sb->len > 0 && isspace((unsigned char)sb->buf[sb->len - 1]))
80 sb->buf[sb->len] = '\0';
83 void strbuf_ltrim(struct strbuf *sb)
86 while (sb->len > 0 && isspace(*b)) {
90 memmove(sb->buf, b, sb->len);
91 sb->buf[sb->len] = '\0';
94 struct strbuf **strbuf_split(const struct strbuf *sb, int delim)
96 int alloc = 2, pos = 0;
101 ret = xcalloc(alloc, sizeof(struct strbuf *));
103 while (n < sb->buf + sb->len) {
105 n = memchr(n, delim, sb->len - (n - sb->buf));
106 if (pos + 1 >= alloc) {
108 ret = xrealloc(ret, sizeof(struct strbuf *) * alloc);
111 n = sb->buf + sb->len - 1;
113 t = xmalloc(sizeof(struct strbuf));
115 strbuf_add(t, p, len);
123 void strbuf_list_free(struct strbuf **sbs)
125 struct strbuf **s = sbs;
134 int strbuf_cmp(const struct strbuf *a, const struct strbuf *b)
136 int len = a->len < b->len ? a->len: b->len;
137 int cmp = memcmp(a->buf, b->buf, len);
140 return a->len < b->len ? -1: a->len != b->len;
143 void strbuf_splice(struct strbuf *sb, size_t pos, size_t len,
144 const void *data, size_t dlen)
147 die("you want to use way too much memory");
149 die("`pos' is too far after the end of the buffer");
150 if (pos + len > sb->len)
151 die("`pos + len' is too far after the end of the buffer");
154 strbuf_grow(sb, dlen - len);
155 memmove(sb->buf + pos + dlen,
157 sb->len - pos - len);
158 memcpy(sb->buf + pos, data, dlen);
159 strbuf_setlen(sb, sb->len + dlen - len);
162 void strbuf_insert(struct strbuf *sb, size_t pos, const void *data, size_t len)
164 strbuf_splice(sb, pos, 0, data, len);
167 void strbuf_remove(struct strbuf *sb, size_t pos, size_t len)
169 strbuf_splice(sb, pos, len, NULL, 0);
172 void strbuf_add(struct strbuf *sb, const void *data, size_t len)
174 strbuf_grow(sb, len);
175 memcpy(sb->buf + sb->len, data, len);
176 strbuf_setlen(sb, sb->len + len);
179 void strbuf_adddup(struct strbuf *sb, size_t pos, size_t len)
181 strbuf_grow(sb, len);
182 memcpy(sb->buf + sb->len, sb->buf + pos, len);
183 strbuf_setlen(sb, sb->len + len);
186 void strbuf_addf(struct strbuf *sb, const char *fmt, ...)
191 if (!strbuf_avail(sb))
194 len = vsnprintf(sb->buf + sb->len, sb->alloc - sb->len, fmt, ap);
197 die("your vsnprintf is broken");
198 if (len > strbuf_avail(sb)) {
199 strbuf_grow(sb, len);
201 len = vsnprintf(sb->buf + sb->len, sb->alloc - sb->len, fmt, ap);
203 if (len > strbuf_avail(sb)) {
204 die("this should not happen, your snprintf is broken");
207 strbuf_setlen(sb, sb->len + len);
210 void strbuf_expand(struct strbuf *sb, const char *format, expand_fn_t fn,
217 percent = strchrnul(format, '%');
218 strbuf_add(sb, format, percent - format);
221 format = percent + 1;
223 if (*format == '%') {
224 strbuf_addch(sb, '%');
229 consumed = fn(sb, format, context);
233 strbuf_addch(sb, '%');
237 size_t strbuf_expand_dict_cb(struct strbuf *sb, const char *placeholder,
240 struct strbuf_expand_dict_entry *e = context;
243 for (; e->placeholder && (len = strlen(e->placeholder)); e++) {
244 if (!strncmp(placeholder, e->placeholder, len)) {
246 strbuf_addstr(sb, e->value);
253 void strbuf_addbuf_percentquote(struct strbuf *dst, const struct strbuf *src)
255 int i, len = src->len;
257 for (i = 0; i < len; i++) {
258 if (src->buf[i] == '%')
259 strbuf_addch(dst, '%');
260 strbuf_addch(dst, src->buf[i]);
264 size_t strbuf_fread(struct strbuf *sb, size_t size, FILE *f)
267 size_t oldalloc = sb->alloc;
269 strbuf_grow(sb, size);
270 res = fread(sb->buf + sb->len, 1, size, f);
272 strbuf_setlen(sb, sb->len + res);
273 else if (oldalloc == 0)
278 ssize_t strbuf_read(struct strbuf *sb, int fd, size_t hint)
280 size_t oldlen = sb->len;
281 size_t oldalloc = sb->alloc;
283 strbuf_grow(sb, hint ? hint : 8192);
287 cnt = xread(fd, sb->buf + sb->len, sb->alloc - sb->len - 1);
292 strbuf_setlen(sb, oldlen);
298 strbuf_grow(sb, 8192);
301 sb->buf[sb->len] = '\0';
302 return sb->len - oldlen;
305 #define STRBUF_MAXLINK (2*PATH_MAX)
307 int strbuf_readlink(struct strbuf *sb, const char *path, size_t hint)
309 size_t oldalloc = sb->alloc;
314 while (hint < STRBUF_MAXLINK) {
317 strbuf_grow(sb, hint);
318 len = readlink(path, sb->buf, hint);
322 } else if (len < hint) {
323 strbuf_setlen(sb, len);
327 /* .. the buffer was too small - try again */
335 int strbuf_getwholeline(struct strbuf *sb, FILE *fp, int term)
344 while ((ch = fgetc(fp)) != EOF) {
346 sb->buf[sb->len++] = ch;
350 if (ch == EOF && sb->len == 0)
353 sb->buf[sb->len] = '\0';
357 int strbuf_getline(struct strbuf *sb, FILE *fp, int term)
359 if (strbuf_getwholeline(sb, fp, term))
361 if (sb->buf[sb->len-1] == term)
362 strbuf_setlen(sb, sb->len-1);
366 int strbuf_read_file(struct strbuf *sb, const char *path, size_t hint)
370 fd = open(path, O_RDONLY);
373 len = strbuf_read(sb, fd, hint);
381 int strbuf_branchname(struct strbuf *sb, const char *name)
383 int len = strlen(name);
384 if (interpret_branch_name(name, sb) == len)
386 strbuf_add(sb, name, len);
390 int strbuf_check_branch_ref(struct strbuf *sb, const char *name)
392 strbuf_branchname(sb, name);
393 strbuf_splice(sb, 0, 0, "refs/heads/", 11);
394 return check_ref_format(sb->buf);