3 int prefixcmp(const char *str, const char *prefix)
5 for (; ; str++, prefix++)
8 else if (*str != *prefix)
9 return (unsigned char)*prefix - (unsigned char)*str;
13 * Used as the default ->buf value, so that people can always assume
14 * buf is non NULL and ->buf is NUL terminated even for a freshly
17 char strbuf_slopbuf[1];
19 void strbuf_init(struct strbuf *sb, ssize_t hint)
21 sb->alloc = sb->len = 0;
22 sb->buf = strbuf_slopbuf;
24 strbuf_grow(sb, hint);
27 void strbuf_release(struct strbuf *sb)
35 char *strbuf_detach(struct strbuf *sb, size_t *sz)
37 char *res = sb->alloc ? sb->buf : NULL;
44 void strbuf_attach(struct strbuf *sb, void *buf, size_t len, size_t alloc)
51 sb->buf[sb->len] = '\0';
54 void strbuf_grow(struct strbuf *sb, size_t extra)
56 if (sb->len + extra + 1 <= sb->len)
57 die("you want to use way too much memory");
60 ALLOC_GROW(sb->buf, sb->len + extra + 1, sb->alloc);
63 void strbuf_trim(struct strbuf *sb)
66 while (sb->len > 0 && isspace((unsigned char)sb->buf[sb->len - 1]))
68 while (sb->len > 0 && isspace(*b)) {
72 memmove(sb->buf, b, sb->len);
73 sb->buf[sb->len] = '\0';
75 void strbuf_rtrim(struct strbuf *sb)
77 while (sb->len > 0 && isspace((unsigned char)sb->buf[sb->len - 1]))
79 sb->buf[sb->len] = '\0';
82 void strbuf_ltrim(struct strbuf *sb)
85 while (sb->len > 0 && isspace(*b)) {
89 memmove(sb->buf, b, sb->len);
90 sb->buf[sb->len] = '\0';
93 void strbuf_tolower(struct strbuf *sb)
97 for (i = 0; i < sb->len; i++)
98 sb->buf[i] = tolower(sb->buf[i]);
101 struct strbuf **strbuf_split(const struct strbuf *sb, int delim)
103 int alloc = 2, pos = 0;
108 ret = calloc(alloc, sizeof(struct strbuf *));
110 while (n < sb->buf + sb->len) {
112 n = memchr(n, delim, sb->len - (n - sb->buf));
113 if (pos + 1 >= alloc) {
115 ret = realloc(ret, sizeof(struct strbuf *) * alloc);
118 n = sb->buf + sb->len - 1;
120 t = malloc(sizeof(struct strbuf));
122 strbuf_add(t, p, len);
130 void strbuf_list_free(struct strbuf **sbs)
132 struct strbuf **s = sbs;
141 int strbuf_cmp(const struct strbuf *a, const struct strbuf *b)
143 int len = a->len < b->len ? a->len: b->len;
144 int cmp = memcmp(a->buf, b->buf, len);
147 return a->len < b->len ? -1: a->len != b->len;
150 void strbuf_splice(struct strbuf *sb, size_t pos, size_t len,
151 const void *data, size_t dlen)
154 die("you want to use way too much memory");
156 die("`pos' is too far after the end of the buffer");
157 if (pos + len > sb->len)
158 die("`pos + len' is too far after the end of the buffer");
161 strbuf_grow(sb, dlen - len);
162 memmove(sb->buf + pos + dlen,
164 sb->len - pos - len);
165 memcpy(sb->buf + pos, data, dlen);
166 strbuf_setlen(sb, sb->len + dlen - len);
169 void strbuf_insert(struct strbuf *sb, size_t pos, const void *data, size_t len)
171 strbuf_splice(sb, pos, 0, data, len);
174 void strbuf_remove(struct strbuf *sb, size_t pos, size_t len)
176 strbuf_splice(sb, pos, len, NULL, 0);
179 void strbuf_add(struct strbuf *sb, const void *data, size_t len)
181 strbuf_grow(sb, len);
182 memcpy(sb->buf + sb->len, data, len);
183 strbuf_setlen(sb, sb->len + len);
186 void strbuf_adddup(struct strbuf *sb, size_t pos, size_t len)
188 strbuf_grow(sb, len);
189 memcpy(sb->buf + sb->len, sb->buf + pos, len);
190 strbuf_setlen(sb, sb->len + len);
193 void strbuf_addf(struct strbuf *sb, const char *fmt, ...)
198 if (!strbuf_avail(sb))
201 len = vsnprintf(sb->buf + sb->len, sb->alloc - sb->len, fmt, ap);
204 die("your vsnprintf is broken");
205 if (len > strbuf_avail(sb)) {
206 strbuf_grow(sb, len);
208 len = vsnprintf(sb->buf + sb->len, sb->alloc - sb->len, fmt, ap);
210 if (len > strbuf_avail(sb)) {
211 die("this should not happen, your snprintf is broken");
214 strbuf_setlen(sb, sb->len + len);
217 void strbuf_expand(struct strbuf *sb, const char *format, expand_fn_t fn,
224 percent = strchrnul(format, '%');
225 strbuf_add(sb, format, percent - format);
228 format = percent + 1;
230 consumed = fn(sb, format, context);
234 strbuf_addch(sb, '%');
238 size_t strbuf_expand_dict_cb(struct strbuf *sb, const char *placeholder,
241 struct strbuf_expand_dict_entry *e = context;
244 for (; e->placeholder && (len = strlen(e->placeholder)); e++) {
245 if (!strncmp(placeholder, e->placeholder, len)) {
247 strbuf_addstr(sb, e->value);
254 size_t strbuf_fread(struct strbuf *sb, size_t size, FILE *f)
257 size_t oldalloc = sb->alloc;
259 strbuf_grow(sb, size);
260 res = fread(sb->buf + sb->len, 1, size, f);
262 strbuf_setlen(sb, sb->len + res);
263 else if (oldalloc == 0)
268 ssize_t strbuf_read(struct strbuf *sb, int fd, ssize_t hint)
270 size_t oldlen = sb->len;
271 size_t oldalloc = sb->alloc;
273 strbuf_grow(sb, hint ? hint : 8192);
277 cnt = read(fd, sb->buf + sb->len, sb->alloc - sb->len - 1);
282 strbuf_setlen(sb, oldlen);
288 strbuf_grow(sb, 8192);
291 sb->buf[sb->len] = '\0';
292 return sb->len - oldlen;
295 #define STRBUF_MAXLINK (2*PATH_MAX)
297 int strbuf_readlink(struct strbuf *sb, const char *path, ssize_t hint)
299 size_t oldalloc = sb->alloc;
304 while (hint < STRBUF_MAXLINK) {
307 strbuf_grow(sb, hint);
308 len = readlink(path, sb->buf, hint);
312 } else if (len < hint) {
313 strbuf_setlen(sb, len);
317 /* .. the buffer was too small - try again */
325 int strbuf_getline(struct strbuf *sb, FILE *fp, int term)
334 while ((ch = fgetc(fp)) != EOF) {
338 sb->buf[sb->len++] = ch;
340 if (ch == EOF && sb->len == 0)
343 sb->buf[sb->len] = '\0';
347 int strbuf_read_file(struct strbuf *sb, const char *path, ssize_t hint)
351 fd = open(path, O_RDONLY);
354 len = strbuf_read(sb, fd, hint);