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;
13 int suffixcmp(const char *str, const char *suffix)
15 int len = strlen(str), suflen = strlen(suffix);
19 return strcmp(str + len - suflen, suffix);
23 * Used as the default ->buf value, so that people can always assume
24 * buf is non NULL and ->buf is NUL terminated even for a freshly
27 char strbuf_slopbuf[1];
29 void strbuf_init(struct strbuf *sb, size_t hint)
31 sb->alloc = sb->len = 0;
32 sb->buf = strbuf_slopbuf;
34 strbuf_grow(sb, hint);
37 void strbuf_release(struct strbuf *sb)
45 char *strbuf_detach(struct strbuf *sb, size_t *sz)
47 char *res = sb->alloc ? sb->buf : NULL;
54 void strbuf_attach(struct strbuf *sb, void *buf, size_t len, size_t alloc)
61 sb->buf[sb->len] = '\0';
64 void strbuf_grow(struct strbuf *sb, size_t extra)
66 int new_buf = !sb->alloc;
67 if (unsigned_add_overflows(extra, 1) ||
68 unsigned_add_overflows(sb->len, extra + 1))
69 die("you want to use way too much memory");
72 ALLOC_GROW(sb->buf, sb->len + extra + 1, sb->alloc);
77 void strbuf_trim(struct strbuf *sb)
80 while (sb->len > 0 && isspace((unsigned char)sb->buf[sb->len - 1]))
82 while (sb->len > 0 && isspace(*b)) {
86 memmove(sb->buf, b, sb->len);
87 sb->buf[sb->len] = '\0';
89 void strbuf_rtrim(struct strbuf *sb)
91 while (sb->len > 0 && isspace((unsigned char)sb->buf[sb->len - 1]))
93 sb->buf[sb->len] = '\0';
96 void strbuf_ltrim(struct strbuf *sb)
99 while (sb->len > 0 && isspace(*b)) {
103 memmove(sb->buf, b, sb->len);
104 sb->buf[sb->len] = '\0';
107 struct strbuf **strbuf_split_buf(const char *str, size_t slen, int delim, int max)
109 int alloc = 2, pos = 0;
114 ret = xcalloc(alloc, sizeof(struct strbuf *));
116 while (n < str + slen) {
118 if (max <= 0 || pos + 1 < max)
119 n = memchr(n, delim, slen - (n - str));
122 if (pos + 1 >= alloc) {
124 ret = xrealloc(ret, sizeof(struct strbuf *) * alloc);
129 t = xmalloc(sizeof(struct strbuf));
131 strbuf_add(t, p, len);
139 void strbuf_list_free(struct strbuf **sbs)
141 struct strbuf **s = sbs;
150 int strbuf_cmp(const struct strbuf *a, const struct strbuf *b)
152 int len = a->len < b->len ? a->len: b->len;
153 int cmp = memcmp(a->buf, b->buf, len);
156 return a->len < b->len ? -1: a->len != b->len;
159 void strbuf_splice(struct strbuf *sb, size_t pos, size_t len,
160 const void *data, size_t dlen)
162 if (unsigned_add_overflows(pos, len))
163 die("you want to use way too much memory");
165 die("`pos' is too far after the end of the buffer");
166 if (pos + len > sb->len)
167 die("`pos + len' is too far after the end of the buffer");
170 strbuf_grow(sb, dlen - len);
171 memmove(sb->buf + pos + dlen,
173 sb->len - pos - len);
174 memcpy(sb->buf + pos, data, dlen);
175 strbuf_setlen(sb, sb->len + dlen - len);
178 void strbuf_insert(struct strbuf *sb, size_t pos, const void *data, size_t len)
180 strbuf_splice(sb, pos, 0, data, len);
183 void strbuf_remove(struct strbuf *sb, size_t pos, size_t len)
185 strbuf_splice(sb, pos, len, NULL, 0);
188 void strbuf_add(struct strbuf *sb, const void *data, size_t len)
190 strbuf_grow(sb, len);
191 memcpy(sb->buf + sb->len, data, len);
192 strbuf_setlen(sb, sb->len + len);
195 void strbuf_adddup(struct strbuf *sb, size_t pos, size_t len)
197 strbuf_grow(sb, len);
198 memcpy(sb->buf + sb->len, sb->buf + pos, len);
199 strbuf_setlen(sb, sb->len + len);
202 void strbuf_addf(struct strbuf *sb, const char *fmt, ...)
206 strbuf_vaddf(sb, fmt, ap);
210 void strbuf_vaddf(struct strbuf *sb, const char *fmt, va_list ap)
215 if (!strbuf_avail(sb))
218 len = vsnprintf(sb->buf + sb->len, sb->alloc - sb->len, fmt, cp);
221 die("BUG: your vsnprintf is broken (returned %d)", len);
222 if (len > strbuf_avail(sb)) {
223 strbuf_grow(sb, len);
224 len = vsnprintf(sb->buf + sb->len, sb->alloc - sb->len, fmt, ap);
225 if (len > strbuf_avail(sb))
226 die("BUG: your vsnprintf is broken (insatiable)");
228 strbuf_setlen(sb, sb->len + len);
231 void strbuf_expand(struct strbuf *sb, const char *format, expand_fn_t fn,
238 percent = strchrnul(format, '%');
239 strbuf_add(sb, format, percent - format);
242 format = percent + 1;
244 if (*format == '%') {
245 strbuf_addch(sb, '%');
250 consumed = fn(sb, format, context);
254 strbuf_addch(sb, '%');
258 size_t strbuf_expand_dict_cb(struct strbuf *sb, const char *placeholder,
261 struct strbuf_expand_dict_entry *e = context;
264 for (; e->placeholder && (len = strlen(e->placeholder)); e++) {
265 if (!strncmp(placeholder, e->placeholder, len)) {
267 strbuf_addstr(sb, e->value);
274 void strbuf_addbuf_percentquote(struct strbuf *dst, const struct strbuf *src)
276 int i, len = src->len;
278 for (i = 0; i < len; i++) {
279 if (src->buf[i] == '%')
280 strbuf_addch(dst, '%');
281 strbuf_addch(dst, src->buf[i]);
285 size_t strbuf_fread(struct strbuf *sb, size_t size, FILE *f)
288 size_t oldalloc = sb->alloc;
290 strbuf_grow(sb, size);
291 res = fread(sb->buf + sb->len, 1, size, f);
293 strbuf_setlen(sb, sb->len + res);
294 else if (oldalloc == 0)
299 ssize_t strbuf_read(struct strbuf *sb, int fd, size_t hint)
301 size_t oldlen = sb->len;
302 size_t oldalloc = sb->alloc;
304 strbuf_grow(sb, hint ? hint : 8192);
308 cnt = xread(fd, sb->buf + sb->len, sb->alloc - sb->len - 1);
313 strbuf_setlen(sb, oldlen);
319 strbuf_grow(sb, 8192);
322 sb->buf[sb->len] = '\0';
323 return sb->len - oldlen;
326 #define STRBUF_MAXLINK (2*PATH_MAX)
328 int strbuf_readlink(struct strbuf *sb, const char *path, size_t hint)
330 size_t oldalloc = sb->alloc;
335 while (hint < STRBUF_MAXLINK) {
338 strbuf_grow(sb, hint);
339 len = readlink(path, sb->buf, hint);
343 } else if (len < hint) {
344 strbuf_setlen(sb, len);
348 /* .. the buffer was too small - try again */
356 int strbuf_getwholeline(struct strbuf *sb, FILE *fp, int term)
364 while ((ch = fgetc(fp)) != EOF) {
366 sb->buf[sb->len++] = ch;
370 if (ch == EOF && sb->len == 0)
373 sb->buf[sb->len] = '\0';
377 int strbuf_getline(struct strbuf *sb, FILE *fp, int term)
379 if (strbuf_getwholeline(sb, fp, term))
381 if (sb->buf[sb->len-1] == term)
382 strbuf_setlen(sb, sb->len-1);
386 int strbuf_read_file(struct strbuf *sb, const char *path, size_t hint)
390 fd = open(path, O_RDONLY);
393 len = strbuf_read(sb, fd, hint);
401 void strbuf_add_lines(struct strbuf *out, const char *prefix,
402 const char *buf, size_t size)
405 const char *next = memchr(buf, '\n', size);
406 next = next ? (next + 1) : (buf + size);
407 strbuf_addstr(out, prefix);
408 strbuf_add(out, buf, next - buf);
412 strbuf_complete_line(out);
415 static int is_rfc3986_reserved(char ch)
418 case '!': case '*': case '\'': case '(': case ')': case ';':
419 case ':': case '@': case '&': case '=': case '+': case '$':
420 case ',': case '/': case '?': case '#': case '[': case ']':
426 static int is_rfc3986_unreserved(char ch)
428 return isalnum(ch) ||
429 ch == '-' || ch == '_' || ch == '.' || ch == '~';
432 void strbuf_add_urlencode(struct strbuf *sb, const char *s, size_t len,
435 strbuf_grow(sb, len);
438 if (is_rfc3986_unreserved(ch) ||
439 (!reserved && is_rfc3986_reserved(ch)))
440 strbuf_addch(sb, ch);
442 strbuf_addf(sb, "%%%02x", ch);
446 void strbuf_addstr_urlencode(struct strbuf *sb, const char *s,
449 strbuf_add_urlencode(sb, s, strlen(s), reserved);