imap-send: support subjectAltName as well
[git/jnareb-git.git] / strbuf.c
blob1a7df12e8f233863cd931a960d453d54050f5584
1 #include "cache.h"
2 #include "refs.h"
4 int prefixcmp(const char *str, const char *prefix)
6 for (; ; str++, prefix++)
7 if (!*prefix)
8 return 0;
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);
16 if (len < suflen)
17 return -1;
18 else
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
25 * initialized strbuf.
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;
33 if (hint) {
34 strbuf_grow(sb, hint);
35 sb->buf[0] = '\0';
39 void strbuf_release(struct strbuf *sb)
41 if (sb->alloc) {
42 free(sb->buf);
43 strbuf_init(sb, 0);
47 char *strbuf_detach(struct strbuf *sb, size_t *sz)
49 char *res = sb->alloc ? sb->buf : NULL;
50 if (sz)
51 *sz = sb->len;
52 strbuf_init(sb, 0);
53 return res;
56 void strbuf_attach(struct strbuf *sb, void *buf, size_t len, size_t alloc)
58 strbuf_release(sb);
59 sb->buf = buf;
60 sb->len = len;
61 sb->alloc = alloc;
62 strbuf_grow(sb, 0);
63 sb->buf[sb->len] = '\0';
66 void strbuf_grow(struct strbuf *sb, size_t extra)
68 if (unsigned_add_overflows(extra, 1) ||
69 unsigned_add_overflows(sb->len, extra + 1))
70 die("you want to use way too much memory");
71 if (!sb->alloc)
72 sb->buf = NULL;
73 ALLOC_GROW(sb->buf, sb->len + extra + 1, sb->alloc);
76 void strbuf_trim(struct strbuf *sb)
78 char *b = sb->buf;
79 while (sb->len > 0 && isspace((unsigned char)sb->buf[sb->len - 1]))
80 sb->len--;
81 while (sb->len > 0 && isspace(*b)) {
82 b++;
83 sb->len--;
85 memmove(sb->buf, b, sb->len);
86 sb->buf[sb->len] = '\0';
88 void strbuf_rtrim(struct strbuf *sb)
90 while (sb->len > 0 && isspace((unsigned char)sb->buf[sb->len - 1]))
91 sb->len--;
92 sb->buf[sb->len] = '\0';
95 void strbuf_ltrim(struct strbuf *sb)
97 char *b = sb->buf;
98 while (sb->len > 0 && isspace(*b)) {
99 b++;
100 sb->len--;
102 memmove(sb->buf, b, sb->len);
103 sb->buf[sb->len] = '\0';
106 struct strbuf **strbuf_split_buf(const char *str, size_t slen, int delim, int max)
108 int alloc = 2, pos = 0;
109 const char *n, *p;
110 struct strbuf **ret;
111 struct strbuf *t;
113 ret = xcalloc(alloc, sizeof(struct strbuf *));
114 p = n = str;
115 while (n < str + slen) {
116 int len;
117 if (max <= 0 || pos + 1 < max)
118 n = memchr(n, delim, slen - (n - str));
119 else
120 n = NULL;
121 if (pos + 1 >= alloc) {
122 alloc = alloc * 2;
123 ret = xrealloc(ret, sizeof(struct strbuf *) * alloc);
125 if (!n)
126 n = str + slen - 1;
127 len = n - p + 1;
128 t = xmalloc(sizeof(struct strbuf));
129 strbuf_init(t, len);
130 strbuf_add(t, p, len);
131 ret[pos] = t;
132 ret[++pos] = NULL;
133 p = ++n;
135 return ret;
138 void strbuf_list_free(struct strbuf **sbs)
140 struct strbuf **s = sbs;
142 while (*s) {
143 strbuf_release(*s);
144 free(*s++);
146 free(sbs);
149 int strbuf_cmp(const struct strbuf *a, const struct strbuf *b)
151 int len = a->len < b->len ? a->len: b->len;
152 int cmp = memcmp(a->buf, b->buf, len);
153 if (cmp)
154 return cmp;
155 return a->len < b->len ? -1: a->len != b->len;
158 void strbuf_splice(struct strbuf *sb, size_t pos, size_t len,
159 const void *data, size_t dlen)
161 if (unsigned_add_overflows(pos, len))
162 die("you want to use way too much memory");
163 if (pos > sb->len)
164 die("`pos' is too far after the end of the buffer");
165 if (pos + len > sb->len)
166 die("`pos + len' is too far after the end of the buffer");
168 if (dlen >= len)
169 strbuf_grow(sb, dlen - len);
170 memmove(sb->buf + pos + dlen,
171 sb->buf + pos + len,
172 sb->len - pos - len);
173 memcpy(sb->buf + pos, data, dlen);
174 strbuf_setlen(sb, sb->len + dlen - len);
177 void strbuf_insert(struct strbuf *sb, size_t pos, const void *data, size_t len)
179 strbuf_splice(sb, pos, 0, data, len);
182 void strbuf_remove(struct strbuf *sb, size_t pos, size_t len)
184 strbuf_splice(sb, pos, len, NULL, 0);
187 void strbuf_add(struct strbuf *sb, const void *data, size_t len)
189 strbuf_grow(sb, len);
190 memcpy(sb->buf + sb->len, data, len);
191 strbuf_setlen(sb, sb->len + len);
194 void strbuf_adddup(struct strbuf *sb, size_t pos, size_t len)
196 strbuf_grow(sb, len);
197 memcpy(sb->buf + sb->len, sb->buf + pos, len);
198 strbuf_setlen(sb, sb->len + len);
201 void strbuf_addf(struct strbuf *sb, const char *fmt, ...)
203 va_list ap;
204 va_start(ap, fmt);
205 strbuf_vaddf(sb, fmt, ap);
206 va_end(ap);
209 void strbuf_vaddf(struct strbuf *sb, const char *fmt, va_list ap)
211 int len;
212 va_list cp;
214 if (!strbuf_avail(sb))
215 strbuf_grow(sb, 64);
216 va_copy(cp, ap);
217 len = vsnprintf(sb->buf + sb->len, sb->alloc - sb->len, fmt, cp);
218 va_end(cp);
219 if (len < 0)
220 die("BUG: your vsnprintf is broken (returned %d)", len);
221 if (len > strbuf_avail(sb)) {
222 strbuf_grow(sb, len);
223 len = vsnprintf(sb->buf + sb->len, sb->alloc - sb->len, fmt, ap);
224 if (len > strbuf_avail(sb))
225 die("BUG: your vsnprintf is broken (insatiable)");
227 strbuf_setlen(sb, sb->len + len);
230 void strbuf_expand(struct strbuf *sb, const char *format, expand_fn_t fn,
231 void *context)
233 for (;;) {
234 const char *percent;
235 size_t consumed;
237 percent = strchrnul(format, '%');
238 strbuf_add(sb, format, percent - format);
239 if (!*percent)
240 break;
241 format = percent + 1;
243 if (*format == '%') {
244 strbuf_addch(sb, '%');
245 format++;
246 continue;
249 consumed = fn(sb, format, context);
250 if (consumed)
251 format += consumed;
252 else
253 strbuf_addch(sb, '%');
257 size_t strbuf_expand_dict_cb(struct strbuf *sb, const char *placeholder,
258 void *context)
260 struct strbuf_expand_dict_entry *e = context;
261 size_t len;
263 for (; e->placeholder && (len = strlen(e->placeholder)); e++) {
264 if (!strncmp(placeholder, e->placeholder, len)) {
265 if (e->value)
266 strbuf_addstr(sb, e->value);
267 return len;
270 return 0;
273 void strbuf_addbuf_percentquote(struct strbuf *dst, const struct strbuf *src)
275 int i, len = src->len;
277 for (i = 0; i < len; i++) {
278 if (src->buf[i] == '%')
279 strbuf_addch(dst, '%');
280 strbuf_addch(dst, src->buf[i]);
284 size_t strbuf_fread(struct strbuf *sb, size_t size, FILE *f)
286 size_t res;
287 size_t oldalloc = sb->alloc;
289 strbuf_grow(sb, size);
290 res = fread(sb->buf + sb->len, 1, size, f);
291 if (res > 0)
292 strbuf_setlen(sb, sb->len + res);
293 else if (oldalloc == 0)
294 strbuf_release(sb);
295 return res;
298 ssize_t strbuf_read(struct strbuf *sb, int fd, size_t hint)
300 size_t oldlen = sb->len;
301 size_t oldalloc = sb->alloc;
303 strbuf_grow(sb, hint ? hint : 8192);
304 for (;;) {
305 ssize_t cnt;
307 cnt = xread(fd, sb->buf + sb->len, sb->alloc - sb->len - 1);
308 if (cnt < 0) {
309 if (oldalloc == 0)
310 strbuf_release(sb);
311 else
312 strbuf_setlen(sb, oldlen);
313 return -1;
315 if (!cnt)
316 break;
317 sb->len += cnt;
318 strbuf_grow(sb, 8192);
321 sb->buf[sb->len] = '\0';
322 return sb->len - oldlen;
325 #define STRBUF_MAXLINK (2*PATH_MAX)
327 int strbuf_readlink(struct strbuf *sb, const char *path, size_t hint)
329 size_t oldalloc = sb->alloc;
331 if (hint < 32)
332 hint = 32;
334 while (hint < STRBUF_MAXLINK) {
335 int len;
337 strbuf_grow(sb, hint);
338 len = readlink(path, sb->buf, hint);
339 if (len < 0) {
340 if (errno != ERANGE)
341 break;
342 } else if (len < hint) {
343 strbuf_setlen(sb, len);
344 return 0;
347 /* .. the buffer was too small - try again */
348 hint *= 2;
350 if (oldalloc == 0)
351 strbuf_release(sb);
352 return -1;
355 int strbuf_getwholeline(struct strbuf *sb, FILE *fp, int term)
357 int ch;
359 strbuf_grow(sb, 0);
360 if (feof(fp))
361 return EOF;
363 strbuf_reset(sb);
364 while ((ch = fgetc(fp)) != EOF) {
365 strbuf_grow(sb, 1);
366 sb->buf[sb->len++] = ch;
367 if (ch == term)
368 break;
370 if (ch == EOF && sb->len == 0)
371 return EOF;
373 sb->buf[sb->len] = '\0';
374 return 0;
377 int strbuf_getline(struct strbuf *sb, FILE *fp, int term)
379 if (strbuf_getwholeline(sb, fp, term))
380 return EOF;
381 if (sb->buf[sb->len-1] == term)
382 strbuf_setlen(sb, sb->len-1);
383 return 0;
386 int strbuf_read_file(struct strbuf *sb, const char *path, size_t hint)
388 int fd, len;
390 fd = open(path, O_RDONLY);
391 if (fd < 0)
392 return -1;
393 len = strbuf_read(sb, fd, hint);
394 close(fd);
395 if (len < 0)
396 return -1;
398 return len;