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)
56 void strbuf_attach(struct strbuf *sb, void *buf, size_t len, size_t alloc)
63 sb->buf[sb->len] = '\0';
66 void strbuf_grow(struct strbuf *sb, size_t extra)
68 int new_buf = !sb->alloc;
69 if (unsigned_add_overflows(extra, 1) ||
70 unsigned_add_overflows(sb->len, extra + 1))
71 die("you want to use way too much memory");
74 ALLOC_GROW(sb->buf, sb->len + extra + 1, sb->alloc);
79 void strbuf_trim(struct strbuf *sb)
82 while (sb->len > 0 && isspace((unsigned char)sb->buf[sb->len - 1]))
84 while (sb->len > 0 && isspace(*b)) {
88 memmove(sb->buf, b, sb->len);
89 sb->buf[sb->len] = '\0';
91 void strbuf_rtrim(struct strbuf *sb)
93 while (sb->len > 0 && isspace((unsigned char)sb->buf[sb->len - 1]))
95 sb->buf[sb->len] = '\0';
98 void strbuf_ltrim(struct strbuf *sb)
101 while (sb->len > 0 && isspace(*b)) {
105 memmove(sb->buf, b, sb->len);
106 sb->buf[sb->len] = '\0';
109 struct strbuf **strbuf_split_buf(const char *str, size_t slen, int delim, int max)
111 int alloc = 2, pos = 0;
116 ret = xcalloc(alloc, sizeof(struct strbuf *));
118 while (n < str + slen) {
120 if (max <= 0 || pos + 1 < max)
121 n = memchr(n, delim, slen - (n - str));
124 if (pos + 1 >= alloc) {
126 ret = xrealloc(ret, sizeof(struct strbuf *) * alloc);
131 t = xmalloc(sizeof(struct strbuf));
133 strbuf_add(t, p, len);
141 void strbuf_list_free(struct strbuf **sbs)
143 struct strbuf **s = sbs;
152 int strbuf_cmp(const struct strbuf *a, const struct strbuf *b)
154 int len = a->len < b->len ? a->len: b->len;
155 int cmp = memcmp(a->buf, b->buf, len);
158 return a->len < b->len ? -1: a->len != b->len;
161 void strbuf_splice(struct strbuf *sb, size_t pos, size_t len,
162 const void *data, size_t dlen)
164 if (unsigned_add_overflows(pos, len))
165 die("you want to use way too much memory");
167 die("`pos' is too far after the end of the buffer");
168 if (pos + len > sb->len)
169 die("`pos + len' is too far after the end of the buffer");
172 strbuf_grow(sb, dlen - len);
173 memmove(sb->buf + pos + dlen,
175 sb->len - pos - len);
176 memcpy(sb->buf + pos, data, dlen);
177 strbuf_setlen(sb, sb->len + dlen - len);
180 void strbuf_insert(struct strbuf *sb, size_t pos, const void *data, size_t len)
182 strbuf_splice(sb, pos, 0, data, len);
185 void strbuf_remove(struct strbuf *sb, size_t pos, size_t len)
187 strbuf_splice(sb, pos, len, NULL, 0);
190 void strbuf_add(struct strbuf *sb, const void *data, size_t len)
192 strbuf_grow(sb, len);
193 memcpy(sb->buf + sb->len, data, len);
194 strbuf_setlen(sb, sb->len + len);
197 void strbuf_adddup(struct strbuf *sb, size_t pos, size_t len)
199 strbuf_grow(sb, len);
200 memcpy(sb->buf + sb->len, sb->buf + pos, len);
201 strbuf_setlen(sb, sb->len + len);
204 void strbuf_addf(struct strbuf *sb, const char *fmt, ...)
208 strbuf_vaddf(sb, fmt, ap);
212 void strbuf_vaddf(struct strbuf *sb, const char *fmt, va_list ap)
217 if (!strbuf_avail(sb))
220 len = vsnprintf(sb->buf + sb->len, sb->alloc - sb->len, fmt, cp);
223 die("BUG: your vsnprintf is broken (returned %d)", len);
224 if (len > strbuf_avail(sb)) {
225 strbuf_grow(sb, len);
226 len = vsnprintf(sb->buf + sb->len, sb->alloc - sb->len, fmt, ap);
227 if (len > strbuf_avail(sb))
228 die("BUG: your vsnprintf is broken (insatiable)");
230 strbuf_setlen(sb, sb->len + len);
233 void strbuf_expand(struct strbuf *sb, const char *format, expand_fn_t fn,
240 percent = strchrnul(format, '%');
241 strbuf_add(sb, format, percent - format);
244 format = percent + 1;
246 if (*format == '%') {
247 strbuf_addch(sb, '%');
252 consumed = fn(sb, format, context);
256 strbuf_addch(sb, '%');
260 size_t strbuf_expand_dict_cb(struct strbuf *sb, const char *placeholder,
263 struct strbuf_expand_dict_entry *e = context;
266 for (; e->placeholder && (len = strlen(e->placeholder)); e++) {
267 if (!strncmp(placeholder, e->placeholder, len)) {
269 strbuf_addstr(sb, e->value);
276 void strbuf_addbuf_percentquote(struct strbuf *dst, const struct strbuf *src)
278 int i, len = src->len;
280 for (i = 0; i < len; i++) {
281 if (src->buf[i] == '%')
282 strbuf_addch(dst, '%');
283 strbuf_addch(dst, src->buf[i]);
287 size_t strbuf_fread(struct strbuf *sb, size_t size, FILE *f)
290 size_t oldalloc = sb->alloc;
292 strbuf_grow(sb, size);
293 res = fread(sb->buf + sb->len, 1, size, f);
295 strbuf_setlen(sb, sb->len + res);
296 else if (oldalloc == 0)
301 ssize_t strbuf_read(struct strbuf *sb, int fd, size_t hint)
303 size_t oldlen = sb->len;
304 size_t oldalloc = sb->alloc;
306 strbuf_grow(sb, hint ? hint : 8192);
310 cnt = xread(fd, sb->buf + sb->len, sb->alloc - sb->len - 1);
315 strbuf_setlen(sb, oldlen);
321 strbuf_grow(sb, 8192);
324 sb->buf[sb->len] = '\0';
325 return sb->len - oldlen;
328 #define STRBUF_MAXLINK (2*PATH_MAX)
330 int strbuf_readlink(struct strbuf *sb, const char *path, size_t hint)
332 size_t oldalloc = sb->alloc;
337 while (hint < STRBUF_MAXLINK) {
340 strbuf_grow(sb, hint);
341 len = readlink(path, sb->buf, hint);
345 } else if (len < hint) {
346 strbuf_setlen(sb, len);
350 /* .. the buffer was too small - try again */
358 int strbuf_getwholeline(struct strbuf *sb, FILE *fp, int term)
366 while ((ch = fgetc(fp)) != EOF) {
368 sb->buf[sb->len++] = ch;
372 if (ch == EOF && sb->len == 0)
375 sb->buf[sb->len] = '\0';
379 int strbuf_getline(struct strbuf *sb, FILE *fp, int term)
381 if (strbuf_getwholeline(sb, fp, term))
383 if (sb->buf[sb->len-1] == term)
384 strbuf_setlen(sb, sb->len-1);
388 int strbuf_getwholeline_fd(struct strbuf *sb, int fd, int term)
394 ssize_t len = xread(fd, &ch, 1);
397 strbuf_addch(sb, ch);
404 int strbuf_read_file(struct strbuf *sb, const char *path, size_t hint)
408 fd = open(path, O_RDONLY);
411 len = strbuf_read(sb, fd, hint);
419 void strbuf_add_lines(struct strbuf *out, const char *prefix,
420 const char *buf, size_t size)
423 const char *next = memchr(buf, '\n', size);
424 next = next ? (next + 1) : (buf + size);
425 strbuf_addstr(out, prefix);
426 strbuf_add(out, buf, next - buf);
430 strbuf_complete_line(out);
433 static int is_rfc3986_reserved(char ch)
436 case '!': case '*': case '\'': case '(': case ')': case ';':
437 case ':': case '@': case '&': case '=': case '+': case '$':
438 case ',': case '/': case '?': case '#': case '[': case ']':
444 static int is_rfc3986_unreserved(char ch)
446 return isalnum(ch) ||
447 ch == '-' || ch == '_' || ch == '.' || ch == '~';
450 static void strbuf_add_urlencode(struct strbuf *sb, const char *s, size_t len,
453 strbuf_grow(sb, len);
456 if (is_rfc3986_unreserved(ch) ||
457 (!reserved && is_rfc3986_reserved(ch)))
458 strbuf_addch(sb, ch);
460 strbuf_addf(sb, "%%%02x", ch);
464 void strbuf_addstr_urlencode(struct strbuf *sb, const char *s,
467 strbuf_add_urlencode(sb, s, strlen(s), reserved);
470 int printf_ln(const char *fmt, ...)
475 ret = vprintf(fmt, ap);
477 if (ret < 0 || putchar('\n') == EOF)
482 int fprintf_ln(FILE *fp, const char *fmt, ...)
487 ret = vfprintf(fp, fmt, ap);
489 if (ret < 0 || putc('\n', fp) == EOF)