blob: aa48d179a9aec236069fc88501c5c26c3569d502 [file] [log] [blame]
Christopher Li812666c2005-04-26 12:00:58 -07001#include "cache.h"
Junio C Hamanoa2fab532009-03-21 14:35:51 -07002#include "refs.h"
Elijah Newrenf6f77552018-04-19 10:58:08 -07003#include "string-list.h"
Jeff Kingd4241f52014-05-22 05:30:14 -04004#include "utf8.h"
Junio C Hamanod1df5742005-04-25 18:26:45 -07005
Christian Couder95662312013-12-01 08:49:16 +01006int starts_with(const char *str, const char *prefix)
7{
8 for (; ; str++, prefix++)
9 if (!*prefix)
10 return 1;
11 else if (*str != *prefix)
12 return 0;
13}
14
Lars Schneider66b8af32018-03-09 18:35:29 +010015int istarts_with(const char *str, const char *prefix)
16{
17 for (; ; str++, prefix++)
18 if (!*prefix)
19 return 1;
20 else if (tolower(*str) != tolower(*prefix))
21 return 0;
22}
23
Christian Couderafaef552017-12-09 21:40:07 +010024int skip_to_optional_arg_default(const char *str, const char *prefix,
25 const char **arg, const char *def)
26{
27 const char *p;
28
29 if (!skip_prefix(str, prefix, &p))
30 return 0;
31
32 if (!*p) {
33 if (arg)
34 *arg = def;
35 return 1;
36 }
37
38 if (*p != '=')
39 return 0;
40
41 if (arg)
42 *arg = p + 1;
43 return 1;
44}
45
Pierre Habouzitb315c5c2007-09-27 12:58:23 +020046/*
47 * Used as the default ->buf value, so that people can always assume
48 * buf is non NULL and ->buf is NUL terminated even for a freshly
49 * initialized strbuf.
50 */
51char strbuf_slopbuf[1];
52
Pierre Habouzit917c9a72007-09-15 15:56:50 +020053void strbuf_init(struct strbuf *sb, size_t hint)
54{
Pierre Habouzitb315c5c2007-09-27 12:58:23 +020055 sb->alloc = sb->len = 0;
56 sb->buf = strbuf_slopbuf;
Thomas Rast8c74ef12011-08-29 23:16:12 +020057 if (hint)
Pierre Habouzitf1696ee2007-09-10 12:35:04 +020058 strbuf_grow(sb, hint);
Junio C Hamanod1df5742005-04-25 18:26:45 -070059}
60
Pierre Habouzit917c9a72007-09-15 15:56:50 +020061void strbuf_release(struct strbuf *sb)
62{
Pierre Habouzitb315c5c2007-09-27 12:58:23 +020063 if (sb->alloc) {
64 free(sb->buf);
65 strbuf_init(sb, 0);
66 }
Pierre Habouzitb449f4c2007-09-06 13:20:05 +020067}
68
Pierre Habouzitb315c5c2007-09-27 12:58:23 +020069char *strbuf_detach(struct strbuf *sb, size_t *sz)
Pierre Habouzit917c9a72007-09-15 15:56:50 +020070{
Jeff King08ad56f2012-10-18 06:00:12 -040071 char *res;
72 strbuf_grow(sb, 0);
73 res = sb->buf;
Pierre Habouzitb315c5c2007-09-27 12:58:23 +020074 if (sz)
75 *sz = sb->len;
Pierre Habouzitf1696ee2007-09-10 12:35:04 +020076 strbuf_init(sb, 0);
Pierre Habouzitb449f4c2007-09-06 13:20:05 +020077 return res;
Junio C Hamanod1df5742005-04-25 18:26:45 -070078}
79
Pierre Habouzit917c9a72007-09-15 15:56:50 +020080void strbuf_attach(struct strbuf *sb, void *buf, size_t len, size_t alloc)
81{
82 strbuf_release(sb);
83 sb->buf = buf;
84 sb->len = len;
85 sb->alloc = alloc;
86 strbuf_grow(sb, 0);
87 sb->buf[sb->len] = '\0';
88}
89
90void strbuf_grow(struct strbuf *sb, size_t extra)
91{
Thomas Rast8c74ef12011-08-29 23:16:12 +020092 int new_buf = !sb->alloc;
Jonathan Nieder1368f652010-10-10 21:59:26 -050093 if (unsigned_add_overflows(extra, 1) ||
94 unsigned_add_overflows(sb->len, extra + 1))
Pierre Habouzitb449f4c2007-09-06 13:20:05 +020095 die("you want to use way too much memory");
Thomas Rast8c74ef12011-08-29 23:16:12 +020096 if (new_buf)
Pierre Habouzitb315c5c2007-09-27 12:58:23 +020097 sb->buf = NULL;
Pierre Habouzitb449f4c2007-09-06 13:20:05 +020098 ALLOC_GROW(sb->buf, sb->len + extra + 1, sb->alloc);
Thomas Rast8c74ef12011-08-29 23:16:12 +020099 if (new_buf)
100 sb->buf[0] = '\0';
Pierre Habouzitb449f4c2007-09-06 13:20:05 +0200101}
102
Lukas Sandströmeacd6dc2008-07-13 20:29:18 +0200103void strbuf_trim(struct strbuf *sb)
104{
Brian Gesiak3bb55e82014-04-30 17:58:06 +0900105 strbuf_rtrim(sb);
106 strbuf_ltrim(sb);
Lukas Sandströmeacd6dc2008-07-13 20:29:18 +0200107}
Nguyễn Thái Ngọc Duyc64a8d22018-02-12 16:49:37 +0700108
Pierre Habouzitf1696ee2007-09-10 12:35:04 +0200109void strbuf_rtrim(struct strbuf *sb)
110{
111 while (sb->len > 0 && isspace((unsigned char)sb->buf[sb->len - 1]))
112 sb->len--;
113 sb->buf[sb->len] = '\0';
114}
115
Nguyễn Thái Ngọc Duyc64a8d22018-02-12 16:49:37 +0700116void strbuf_trim_trailing_dir_sep(struct strbuf *sb)
117{
118 while (sb->len > 0 && is_dir_sep((unsigned char)sb->buf[sb->len - 1]))
119 sb->len--;
120 sb->buf[sb->len] = '\0';
121}
122
Pratik Karkif9573622018-08-08 20:51:16 +0545123void strbuf_trim_trailing_newline(struct strbuf *sb)
124{
125 if (sb->len > 0 && sb->buf[sb->len - 1] == '\n') {
126 if (--sb->len > 0 && sb->buf[sb->len - 1] == '\r')
127 --sb->len;
128 sb->buf[sb->len] = '\0';
129 }
130}
131
Lukas Sandströmeacd6dc2008-07-13 20:29:18 +0200132void strbuf_ltrim(struct strbuf *sb)
133{
134 char *b = sb->buf;
135 while (sb->len > 0 && isspace(*b)) {
136 b++;
137 sb->len--;
138 }
139 memmove(sb->buf, b, sb->len);
140 sb->buf[sb->len] = '\0';
141}
142
Jeff Kingd4241f52014-05-22 05:30:14 -0400143int strbuf_reencode(struct strbuf *sb, const char *from, const char *to)
144{
145 char *out;
Jeff Kingc7d017d2018-07-24 06:50:33 -0400146 size_t len;
Jeff Kingd4241f52014-05-22 05:30:14 -0400147
148 if (same_encoding(from, to))
149 return 0;
150
151 out = reencode_string_len(sb->buf, sb->len, to, from, &len);
152 if (!out)
153 return -1;
154
155 strbuf_attach(sb, out, len, len);
156 return 0;
157}
158
Jeff Kingffb20ce2014-05-23 16:03:47 -0400159void strbuf_tolower(struct strbuf *sb)
160{
161 char *p = sb->buf, *end = sb->buf + sb->len;
162 for (; p < end; p++)
163 *p = tolower(*p);
164}
165
Michael Haggerty17b73dc2012-11-04 07:46:53 +0100166struct strbuf **strbuf_split_buf(const char *str, size_t slen,
167 int terminator, int max)
Lukas Sandströmeacd6dc2008-07-13 20:29:18 +0200168{
Michael Haggertyb8c2c1f2012-11-04 07:46:51 +0100169 struct strbuf **ret = NULL;
170 size_t nr = 0, alloc = 0;
Lukas Sandströmeacd6dc2008-07-13 20:29:18 +0200171 struct strbuf *t;
172
Michael Haggerty1173bb32012-11-04 07:46:52 +0100173 while (slen) {
174 int len = slen;
175 if (max <= 0 || nr + 1 < max) {
Michael Haggerty17b73dc2012-11-04 07:46:53 +0100176 const char *end = memchr(str, terminator, slen);
Michael Haggerty1173bb32012-11-04 07:46:52 +0100177 if (end)
178 len = end - str + 1;
179 }
Lukas Sandströmeacd6dc2008-07-13 20:29:18 +0200180 t = xmalloc(sizeof(struct strbuf));
181 strbuf_init(t, len);
Michael Haggerty1173bb32012-11-04 07:46:52 +0100182 strbuf_add(t, str, len);
Michael Haggertyb8c2c1f2012-11-04 07:46:51 +0100183 ALLOC_GROW(ret, nr + 2, alloc);
184 ret[nr++] = t;
Michael Haggerty1173bb32012-11-04 07:46:52 +0100185 str += len;
186 slen -= len;
Lukas Sandströmeacd6dc2008-07-13 20:29:18 +0200187 }
Michael Haggertyb8c2c1f2012-11-04 07:46:51 +0100188 ALLOC_GROW(ret, nr + 1, alloc); /* In case string was empty */
189 ret[nr] = NULL;
Lukas Sandströmeacd6dc2008-07-13 20:29:18 +0200190 return ret;
191}
192
Elijah Newrenf6f77552018-04-19 10:58:08 -0700193void strbuf_add_separated_string_list(struct strbuf *str,
194 const char *sep,
195 struct string_list *slist)
196{
197 struct string_list_item *item;
198 int sep_needed = 0;
199
200 for_each_string_list_item(item, slist) {
201 if (sep_needed)
202 strbuf_addstr(str, sep);
203 strbuf_addstr(str, item->string);
204 sep_needed = 1;
205 }
206}
207
Lukas Sandströmeacd6dc2008-07-13 20:29:18 +0200208void strbuf_list_free(struct strbuf **sbs)
209{
210 struct strbuf **s = sbs;
211
212 while (*s) {
213 strbuf_release(*s);
214 free(*s++);
215 }
216 free(sbs);
217}
218
Lukas Sandström9b200fd2008-07-13 20:28:24 +0200219int strbuf_cmp(const struct strbuf *a, const struct strbuf *b)
Pierre Habouzit45f66f62007-09-24 11:25:03 +0200220{
Jeff King26114c02018-07-24 06:51:08 -0400221 size_t len = a->len < b->len ? a->len: b->len;
Alex Riesen8f024652009-03-19 23:27:32 +0100222 int cmp = memcmp(a->buf, b->buf, len);
223 if (cmp)
224 return cmp;
225 return a->len < b->len ? -1: a->len != b->len;
Pierre Habouzit45f66f62007-09-24 11:25:03 +0200226}
227
Pierre Habouzit917c9a72007-09-15 15:56:50 +0200228void strbuf_splice(struct strbuf *sb, size_t pos, size_t len,
229 const void *data, size_t dlen)
230{
Jonathan Nieder1368f652010-10-10 21:59:26 -0500231 if (unsigned_add_overflows(pos, len))
Pierre Habouzit917c9a72007-09-15 15:56:50 +0200232 die("you want to use way too much memory");
233 if (pos > sb->len)
234 die("`pos' is too far after the end of the buffer");
235 if (pos + len > sb->len)
236 die("`pos + len' is too far after the end of the buffer");
237
238 if (dlen >= len)
239 strbuf_grow(sb, dlen - len);
240 memmove(sb->buf + pos + dlen,
241 sb->buf + pos + len,
242 sb->len - pos - len);
243 memcpy(sb->buf + pos, data, dlen);
244 strbuf_setlen(sb, sb->len + dlen - len);
245}
246
Pierre Habouzitc76689d2007-09-20 00:42:12 +0200247void strbuf_insert(struct strbuf *sb, size_t pos, const void *data, size_t len)
248{
249 strbuf_splice(sb, pos, 0, data, len);
250}
251
Paul-Sebastian Ungureanu5ef264d2019-02-25 23:16:07 +0000252void strbuf_vinsertf(struct strbuf *sb, size_t pos, const char *fmt, va_list ap)
253{
254 int len, len2;
255 char save;
256 va_list cp;
257
258 if (pos > sb->len)
259 die("`pos' is too far after the end of the buffer");
260 va_copy(cp, ap);
261 len = vsnprintf(sb->buf + sb->len, 0, fmt, cp);
262 va_end(cp);
263 if (len < 0)
264 BUG("your vsnprintf is broken (returned %d)", len);
265 if (!len)
266 return; /* nothing to do */
267 if (unsigned_add_overflows(sb->len, len))
268 die("you want to use way too much memory");
269 strbuf_grow(sb, len);
270 memmove(sb->buf + pos + len, sb->buf + pos, sb->len - pos);
271 /* vsnprintf() will append a NUL, overwriting one of our characters */
272 save = sb->buf[pos + len];
273 len2 = vsnprintf(sb->buf + pos, len + 1, fmt, ap);
274 sb->buf[pos + len] = save;
275 if (len2 != len)
276 BUG("your vsnprintf is broken (returns inconsistent lengths)");
277 strbuf_setlen(sb, sb->len + len);
278}
279
280void strbuf_insertf(struct strbuf *sb, size_t pos, const char *fmt, ...)
281{
282 va_list ap;
283 va_start(ap, fmt);
284 strbuf_vinsertf(sb, pos, fmt, ap);
285 va_end(ap);
286}
287
Pierre Habouzitc76689d2007-09-20 00:42:12 +0200288void strbuf_remove(struct strbuf *sb, size_t pos, size_t len)
289{
René Scharfea8342a42016-09-13 18:40:22 +0200290 strbuf_splice(sb, pos, len, "", 0);
Pierre Habouzitc76689d2007-09-20 00:42:12 +0200291}
292
Pierre Habouzit917c9a72007-09-15 15:56:50 +0200293void strbuf_add(struct strbuf *sb, const void *data, size_t len)
294{
Pierre Habouzitb449f4c2007-09-06 13:20:05 +0200295 strbuf_grow(sb, len);
296 memcpy(sb->buf + sb->len, data, len);
297 strbuf_setlen(sb, sb->len + len);
298}
299
René Scharfe31471ba2016-07-21 18:46:44 +0200300void strbuf_addbuf(struct strbuf *sb, const struct strbuf *sb2)
301{
302 strbuf_grow(sb, sb2->len);
303 memcpy(sb->buf + sb->len, sb2->buf, sb2->len);
304 strbuf_setlen(sb, sb->len + sb2->len);
305}
306
Paul-Sebastian Ungureanue71c4a82019-02-25 23:16:06 +0000307const char *strbuf_join_argv(struct strbuf *buf,
308 int argc, const char **argv, char delim)
309{
310 if (!argc)
311 return buf->buf;
312
313 strbuf_addstr(buf, *argv);
314 while (--argc) {
315 strbuf_addch(buf, delim);
316 strbuf_addstr(buf, *(++argv));
317 }
318
319 return buf->buf;
320}
321
René Scharfed07235a2014-09-07 09:03:32 +0200322void strbuf_addchars(struct strbuf *sb, int c, size_t n)
323{
324 strbuf_grow(sb, n);
325 memset(sb->buf + sb->len, c, n);
326 strbuf_setlen(sb, sb->len + n);
327}
328
Pierre Habouzit917c9a72007-09-15 15:56:50 +0200329void strbuf_addf(struct strbuf *sb, const char *fmt, ...)
330{
Pierre Habouzitb449f4c2007-09-06 13:20:05 +0200331 va_list ap;
Jeff Kingebeb6092011-02-25 23:08:53 -0600332 va_start(ap, fmt);
333 strbuf_vaddf(sb, fmt, ap);
334 va_end(ap);
335}
336
Junio C Hamanoeff80a92013-01-16 20:18:48 +0100337static void add_lines(struct strbuf *out,
338 const char *prefix1,
339 const char *prefix2,
340 const char *buf, size_t size)
341{
342 while (size) {
343 const char *prefix;
344 const char *next = memchr(buf, '\n', size);
345 next = next ? (next + 1) : (buf + size);
346
Junio C Hamanod55aeb72014-10-27 14:13:15 -0700347 prefix = ((prefix2 && (buf[0] == '\n' || buf[0] == '\t'))
348 ? prefix2 : prefix1);
Junio C Hamanoeff80a92013-01-16 20:18:48 +0100349 strbuf_addstr(out, prefix);
350 strbuf_add(out, buf, next - buf);
351 size -= next - buf;
352 buf = next;
353 }
354 strbuf_complete_line(out);
355}
356
357void strbuf_add_commented_lines(struct strbuf *out, const char *buf, size_t size)
358{
359 static char prefix1[3];
360 static char prefix2[2];
361
362 if (prefix1[0] != comment_line_char) {
Jeff King5096d492015-09-24 17:06:08 -0400363 xsnprintf(prefix1, sizeof(prefix1), "%c ", comment_line_char);
364 xsnprintf(prefix2, sizeof(prefix2), "%c", comment_line_char);
Junio C Hamanoeff80a92013-01-16 20:18:48 +0100365 }
366 add_lines(out, prefix1, prefix2, buf, size);
367}
368
369void strbuf_commented_addf(struct strbuf *sb, const char *fmt, ...)
370{
371 va_list params;
372 struct strbuf buf = STRBUF_INIT;
373 int incomplete_line = sb->len && sb->buf[sb->len - 1] != '\n';
374
375 va_start(params, fmt);
376 strbuf_vaddf(&buf, fmt, params);
377 va_end(params);
378
379 strbuf_add_commented_lines(sb, buf.buf, buf.len);
380 if (incomplete_line)
381 sb->buf[--sb->len] = '\0';
382
383 strbuf_release(&buf);
384}
385
Jeff Kingebeb6092011-02-25 23:08:53 -0600386void strbuf_vaddf(struct strbuf *sb, const char *fmt, va_list ap)
387{
388 int len;
389 va_list cp;
Pierre Habouzitb449f4c2007-09-06 13:20:05 +0200390
Shawn O. Pearcef141bd82007-11-13 03:22:44 -0500391 if (!strbuf_avail(sb))
392 strbuf_grow(sb, 64);
Jeff Kingebeb6092011-02-25 23:08:53 -0600393 va_copy(cp, ap);
394 len = vsnprintf(sb->buf + sb->len, sb->alloc - sb->len, fmt, cp);
395 va_end(cp);
Shawn O. Pearcef141bd82007-11-13 03:22:44 -0500396 if (len < 0)
Johannes Schindelin033abf92018-05-02 11:38:39 +0200397 BUG("your vsnprintf is broken (returned %d)", len);
Pierre Habouzitf1696ee2007-09-10 12:35:04 +0200398 if (len > strbuf_avail(sb)) {
Pierre Habouzitb449f4c2007-09-06 13:20:05 +0200399 strbuf_grow(sb, len);
Pierre Habouzitb449f4c2007-09-06 13:20:05 +0200400 len = vsnprintf(sb->buf + sb->len, sb->alloc - sb->len, fmt, ap);
Jeff Kingebeb6092011-02-25 23:08:53 -0600401 if (len > strbuf_avail(sb))
Johannes Schindelin033abf92018-05-02 11:38:39 +0200402 BUG("your vsnprintf is broken (insatiable)");
Pierre Habouzitb449f4c2007-09-06 13:20:05 +0200403 }
404 strbuf_setlen(sb, sb->len + len);
Junio C Hamanod1df5742005-04-25 18:26:45 -0700405}
406
Marco Costalbac3a670d2008-02-09 15:40:19 +0100407void strbuf_expand(struct strbuf *sb, const char *format, expand_fn_t fn,
408 void *context)
René Scharfecde75e52007-11-09 01:49:42 +0100409{
410 for (;;) {
Marco Costalbac3a670d2008-02-09 15:40:19 +0100411 const char *percent;
412 size_t consumed;
René Scharfecde75e52007-11-09 01:49:42 +0100413
414 percent = strchrnul(format, '%');
415 strbuf_add(sb, format, percent - format);
416 if (!*percent)
417 break;
418 format = percent + 1;
419
Jeff King0a0416a2010-01-13 12:35:31 -0500420 if (*format == '%') {
421 strbuf_addch(sb, '%');
422 format++;
423 continue;
424 }
425
Marco Costalbac3a670d2008-02-09 15:40:19 +0100426 consumed = fn(sb, format, context);
427 if (consumed)
428 format += consumed;
429 else
René Scharfecde75e52007-11-09 01:49:42 +0100430 strbuf_addch(sb, '%');
431 }
432}
433
Anders Waldenborgfd2015b2019-01-28 22:33:36 +0100434size_t strbuf_expand_literal_cb(struct strbuf *sb,
435 const char *placeholder,
436 void *context)
437{
438 int ch;
439
440 switch (placeholder[0]) {
441 case 'n': /* newline */
442 strbuf_addch(sb, '\n');
443 return 1;
444 case 'x':
445 /* %x00 == NUL, %x0a == LF, etc. */
446 ch = hex2chr(placeholder + 1);
447 if (ch < 0)
448 return 0;
449 strbuf_addch(sb, ch);
450 return 3;
451 }
452 return 0;
453}
454
René Scharfe9b864e72008-11-23 00:09:30 +0100455size_t strbuf_expand_dict_cb(struct strbuf *sb, const char *placeholder,
456 void *context)
457{
458 struct strbuf_expand_dict_entry *e = context;
459 size_t len;
460
461 for (; e->placeholder && (len = strlen(e->placeholder)); e++) {
462 if (!strncmp(placeholder, e->placeholder, len)) {
463 if (e->value)
464 strbuf_addstr(sb, e->value);
465 return len;
466 }
467 }
468 return 0;
469}
470
Jeff King361df5d2010-01-13 12:36:42 -0500471void strbuf_addbuf_percentquote(struct strbuf *dst, const struct strbuf *src)
472{
Jeff King26114c02018-07-24 06:51:08 -0400473 size_t i, len = src->len;
Jeff King361df5d2010-01-13 12:36:42 -0500474
475 for (i = 0; i < len; i++) {
476 if (src->buf[i] == '%')
477 strbuf_addch(dst, '%');
478 strbuf_addch(dst, src->buf[i]);
479 }
480}
481
Pierre Habouzit917c9a72007-09-15 15:56:50 +0200482size_t strbuf_fread(struct strbuf *sb, size_t size, FILE *f)
483{
Pierre Habouzitb449f4c2007-09-06 13:20:05 +0200484 size_t res;
René Scharfe2fc64702009-01-06 21:41:14 +0100485 size_t oldalloc = sb->alloc;
Pierre Habouzitb449f4c2007-09-06 13:20:05 +0200486
487 strbuf_grow(sb, size);
488 res = fread(sb->buf + sb->len, 1, size, f);
René Scharfe2fc64702009-01-06 21:41:14 +0100489 if (res > 0)
Pierre Habouzitb449f4c2007-09-06 13:20:05 +0200490 strbuf_setlen(sb, sb->len + res);
Roel Kluin6651c3f2009-06-22 18:42:33 +0200491 else if (oldalloc == 0)
René Scharfe2fc64702009-01-06 21:41:14 +0100492 strbuf_release(sb);
Pierre Habouzitb449f4c2007-09-06 13:20:05 +0200493 return res;
494}
495
Pierre Habouzitf1696ee2007-09-10 12:35:04 +0200496ssize_t strbuf_read(struct strbuf *sb, int fd, size_t hint)
Pierre Habouzitb449f4c2007-09-06 13:20:05 +0200497{
498 size_t oldlen = sb->len;
René Scharfe2fc64702009-01-06 21:41:14 +0100499 size_t oldalloc = sb->alloc;
Pierre Habouzitb449f4c2007-09-06 13:20:05 +0200500
Pierre Habouzitf1696ee2007-09-10 12:35:04 +0200501 strbuf_grow(sb, hint ? hint : 8192);
Pierre Habouzitb449f4c2007-09-06 13:20:05 +0200502 for (;;) {
Jim Hill3ebbd002015-05-31 11:16:45 -0700503 ssize_t want = sb->alloc - sb->len - 1;
504 ssize_t got = read_in_full(fd, sb->buf + sb->len, want);
Pierre Habouzitb449f4c2007-09-06 13:20:05 +0200505
Jim Hill3ebbd002015-05-31 11:16:45 -0700506 if (got < 0) {
René Scharfe2fc64702009-01-06 21:41:14 +0100507 if (oldalloc == 0)
508 strbuf_release(sb);
509 else
510 strbuf_setlen(sb, oldlen);
Pierre Habouzitb449f4c2007-09-06 13:20:05 +0200511 return -1;
512 }
Jim Hill3ebbd002015-05-31 11:16:45 -0700513 sb->len += got;
514 if (got < want)
Pierre Habouzitb449f4c2007-09-06 13:20:05 +0200515 break;
Pierre Habouzitf1696ee2007-09-10 12:35:04 +0200516 strbuf_grow(sb, 8192);
Pierre Habouzitb449f4c2007-09-06 13:20:05 +0200517 }
518
519 sb->buf[sb->len] = '\0';
520 return sb->len - oldlen;
Junio C Hamanod1df5742005-04-25 18:26:45 -0700521}
522
Stefan Bellerb4e04fb2015-12-15 16:04:08 -0800523ssize_t strbuf_read_once(struct strbuf *sb, int fd, size_t hint)
524{
René Scharfec3ff8f62017-12-07 21:51:26 +0100525 size_t oldalloc = sb->alloc;
Stefan Bellerb4e04fb2015-12-15 16:04:08 -0800526 ssize_t cnt;
527
528 strbuf_grow(sb, hint ? hint : 8192);
529 cnt = xread(fd, sb->buf + sb->len, sb->alloc - sb->len - 1);
530 if (cnt > 0)
531 strbuf_setlen(sb, sb->len + cnt);
René Scharfec3ff8f62017-12-07 21:51:26 +0100532 else if (oldalloc == 0)
533 strbuf_release(sb);
Stefan Bellerb4e04fb2015-12-15 16:04:08 -0800534 return cnt;
535}
536
Stefan Beller2dac9b52016-02-29 18:07:15 -0800537ssize_t strbuf_write(struct strbuf *sb, FILE *f)
538{
539 return sb->len ? fwrite(sb->buf, 1, sb->len, f) : 0;
540}
541
542
Linus Torvaldsb11b7e12008-12-17 09:36:40 -0800543#define STRBUF_MAXLINK (2*PATH_MAX)
544
545int strbuf_readlink(struct strbuf *sb, const char *path, size_t hint)
546{
René Scharfe2fc64702009-01-06 21:41:14 +0100547 size_t oldalloc = sb->alloc;
548
Linus Torvaldsb11b7e12008-12-17 09:36:40 -0800549 if (hint < 32)
550 hint = 32;
551
552 while (hint < STRBUF_MAXLINK) {
Jeff Kingf3e76ed2018-07-24 06:51:25 -0400553 ssize_t len;
Linus Torvaldsb11b7e12008-12-17 09:36:40 -0800554
555 strbuf_grow(sb, hint);
556 len = readlink(path, sb->buf, hint);
557 if (len < 0) {
558 if (errno != ERANGE)
559 break;
560 } else if (len < hint) {
561 strbuf_setlen(sb, len);
562 return 0;
563 }
564
565 /* .. the buffer was too small - try again */
566 hint *= 2;
567 }
René Scharfe2fc64702009-01-06 21:41:14 +0100568 if (oldalloc == 0)
569 strbuf_release(sb);
Linus Torvaldsb11b7e12008-12-17 09:36:40 -0800570 return -1;
571}
572
René Scharfef22a76e2014-07-28 20:24:29 +0200573int strbuf_getcwd(struct strbuf *sb)
574{
575 size_t oldalloc = sb->alloc;
576 size_t guessed_len = 128;
577
578 for (;; guessed_len *= 2) {
579 strbuf_grow(sb, guessed_len);
580 if (getcwd(sb->buf, sb->alloc)) {
581 strbuf_setlen(sb, strlen(sb->buf));
582 return 0;
583 }
René Scharfea54e9382017-03-26 15:43:50 +0200584
585 /*
586 * If getcwd(3) is implemented as a syscall that falls
587 * back to a regular lookup using readdir(3) etc. then
588 * we may be able to avoid EACCES by providing enough
589 * space to the syscall as it's not necessarily bound
590 * to the same restrictions as the fallback.
591 */
592 if (errno == EACCES && guessed_len < PATH_MAX)
593 continue;
594
René Scharfef22a76e2014-07-28 20:24:29 +0200595 if (errno != ERANGE)
596 break;
597 }
598 if (oldalloc == 0)
599 strbuf_release(sb);
600 else
601 strbuf_reset(sb);
602 return -1;
603}
604
Jeff King0cc30e02015-04-16 05:01:38 -0400605#ifdef HAVE_GETDELIM
606int strbuf_getwholeline(struct strbuf *sb, FILE *fp, int term)
607{
608 ssize_t r;
609
610 if (feof(fp))
611 return EOF;
612
613 strbuf_reset(sb);
614
615 /* Translate slopbuf to NULL, as we cannot call realloc on it */
616 if (!sb->alloc)
617 sb->buf = NULL;
René Scharfe642956c2017-08-10 22:56:40 +0200618 errno = 0;
Jeff King0cc30e02015-04-16 05:01:38 -0400619 r = getdelim(&sb->buf, &sb->alloc, term, fp);
620
621 if (r > 0) {
622 sb->len = r;
623 return 0;
624 }
625 assert(r == -1);
626
627 /*
628 * Normally we would have called xrealloc, which will try to free
629 * memory and recover. But we have no way to tell getdelim() to do so.
630 * Worse, we cannot try to recover ENOMEM ourselves, because we have
631 * no idea how many bytes were read by getdelim.
632 *
633 * Dying here is reasonable. It mirrors what xrealloc would do on
634 * catastrophic memory failure. We skip the opportunity to free pack
635 * memory and retry, but that's unlikely to help for a malloc small
636 * enough to hold a single line of input, anyway.
637 */
638 if (errno == ENOMEM)
639 die("Out of memory, getdelim failed");
640
Jeff Kingb7090432016-03-05 13:43:30 -0500641 /*
642 * Restore strbuf invariants; if getdelim left us with a NULL pointer,
643 * we can just re-init, but otherwise we should make sure that our
644 * length is empty, and that the result is NUL-terminated.
645 */
Jeff King0cc30e02015-04-16 05:01:38 -0400646 if (!sb->buf)
647 strbuf_init(sb, 0);
Jeff Kingb7090432016-03-05 13:43:30 -0500648 else
649 strbuf_reset(sb);
Jeff King0cc30e02015-04-16 05:01:38 -0400650 return EOF;
651}
652#else
Brandon Caseyc7e4f0d2009-08-04 22:31:56 -0500653int strbuf_getwholeline(struct strbuf *sb, FILE *fp, int term)
Pierre Habouzit917c9a72007-09-15 15:56:50 +0200654{
Junio C Hamanod1df5742005-04-25 18:26:45 -0700655 int ch;
Pierre Habouzite6c019d2007-09-17 11:19:04 +0200656
Pierre Habouzite6c019d2007-09-17 11:19:04 +0200657 if (feof(fp))
658 return EOF;
Pierre Habouzitb449f4c2007-09-06 13:20:05 +0200659
660 strbuf_reset(sb);
Jeff King82912d12015-04-16 04:49:06 -0400661 flockfile(fp);
662 while ((ch = getc_unlocked(fp)) != EOF) {
Jeff Kingf80c1532015-04-16 04:58:54 -0400663 if (!strbuf_avail(sb))
664 strbuf_grow(sb, 1);
Pierre Habouzitb449f4c2007-09-06 13:20:05 +0200665 sb->buf[sb->len++] = ch;
Brandon Caseyc7e4f0d2009-08-04 22:31:56 -0500666 if (ch == term)
667 break;
Junio C Hamanod1df5742005-04-25 18:26:45 -0700668 }
Jeff King82912d12015-04-16 04:49:06 -0400669 funlockfile(fp);
Pierre Habouzite6c019d2007-09-17 11:19:04 +0200670 if (ch == EOF && sb->len == 0)
671 return EOF;
Pierre Habouzitb449f4c2007-09-06 13:20:05 +0200672
Pierre Habouzitb449f4c2007-09-06 13:20:05 +0200673 sb->buf[sb->len] = '\0';
Pierre Habouzite6c019d2007-09-17 11:19:04 +0200674 return 0;
Junio C Hamanod1df5742005-04-25 18:26:45 -0700675}
Jeff King0cc30e02015-04-16 05:01:38 -0400676#endif
Kristian Høgsberga9390b92007-09-17 20:06:46 -0400677
Junio C Hamano1a0c8df2016-01-13 18:32:23 -0800678static int strbuf_getdelim(struct strbuf *sb, FILE *fp, int term)
Brandon Caseyc7e4f0d2009-08-04 22:31:56 -0500679{
680 if (strbuf_getwholeline(sb, fp, term))
681 return EOF;
Junio C Hamanodce80bd2016-01-13 15:10:45 -0800682 if (sb->buf[sb->len - 1] == term)
683 strbuf_setlen(sb, sb->len - 1);
Brandon Caseyc7e4f0d2009-08-04 22:31:56 -0500684 return 0;
685}
686
Junio C Hamano1a0c8df2016-01-13 18:32:23 -0800687int strbuf_getline(struct strbuf *sb, FILE *fp)
Junio C Hamanoc8aa9fd2015-10-28 13:17:29 -0700688{
689 if (strbuf_getwholeline(sb, fp, '\n'))
690 return EOF;
691 if (sb->buf[sb->len - 1] == '\n') {
692 strbuf_setlen(sb, sb->len - 1);
693 if (sb->len && sb->buf[sb->len - 1] == '\r')
694 strbuf_setlen(sb, sb->len - 1);
695 }
696 return 0;
697}
698
Junio C Hamano8f309ae2016-01-13 15:31:17 -0800699int strbuf_getline_lf(struct strbuf *sb, FILE *fp)
700{
Junio C Hamano1a0c8df2016-01-13 18:32:23 -0800701 return strbuf_getdelim(sb, fp, '\n');
Junio C Hamano8f309ae2016-01-13 15:31:17 -0800702}
703
704int strbuf_getline_nul(struct strbuf *sb, FILE *fp)
705{
Junio C Hamano1a0c8df2016-01-13 18:32:23 -0800706 return strbuf_getdelim(sb, fp, '\0');
Junio C Hamano8f309ae2016-01-13 15:31:17 -0800707}
708
Thomas Rast5e8617f2012-02-22 20:34:22 +0100709int strbuf_getwholeline_fd(struct strbuf *sb, int fd, int term)
710{
711 strbuf_reset(sb);
712
713 while (1) {
714 char ch;
715 ssize_t len = xread(fd, &ch, 1);
716 if (len <= 0)
717 return EOF;
718 strbuf_addch(sb, ch);
719 if (ch == term)
720 break;
721 }
722 return 0;
723}
724
Michael Haggerty6c8afe42015-07-03 15:59:32 +0200725ssize_t strbuf_read_file(struct strbuf *sb, const char *path, size_t hint)
Kristian Høgsberga9390b92007-09-17 20:06:46 -0400726{
Michael Haggerty6c8afe42015-07-03 15:59:32 +0200727 int fd;
728 ssize_t len;
Jeff King79f0ba12018-02-23 02:00:54 -0500729 int saved_errno;
Kristian Høgsberga9390b92007-09-17 20:06:46 -0400730
731 fd = open(path, O_RDONLY);
732 if (fd < 0)
733 return -1;
Pierre Habouzit387e7e12007-09-27 15:25:55 +0200734 len = strbuf_read(sb, fd, hint);
Jeff King79f0ba12018-02-23 02:00:54 -0500735 saved_errno = errno;
Kristian Høgsberga9390b92007-09-17 20:06:46 -0400736 close(fd);
Jeff King79f0ba12018-02-23 02:00:54 -0500737 if (len < 0) {
738 errno = saved_errno;
Kristian Høgsberga9390b92007-09-17 20:06:46 -0400739 return -1;
Jeff King79f0ba12018-02-23 02:00:54 -0500740 }
Kristian Høgsberga9390b92007-09-17 20:06:46 -0400741
742 return len;
743}
Junio C Hamano895680f2011-11-04 21:06:30 -0700744
745void strbuf_add_lines(struct strbuf *out, const char *prefix,
746 const char *buf, size_t size)
747{
Junio C Hamanoeff80a92013-01-16 20:18:48 +0100748 add_lines(out, prefix, NULL, buf, size);
Junio C Hamano895680f2011-11-04 21:06:30 -0700749}
Junio C Hamano367d20e2011-12-19 16:05:16 -0800750
Michael Haggerty5963c032012-11-25 12:08:34 +0100751void strbuf_addstr_xml_quoted(struct strbuf *buf, const char *s)
752{
753 while (*s) {
754 size_t len = strcspn(s, "\"<>&");
755 strbuf_add(buf, s, len);
756 s += len;
757 switch (*s) {
758 case '"':
759 strbuf_addstr(buf, "&quot;");
760 break;
761 case '<':
762 strbuf_addstr(buf, "&lt;");
763 break;
764 case '>':
765 strbuf_addstr(buf, "&gt;");
766 break;
767 case '&':
768 strbuf_addstr(buf, "&amp;");
769 break;
770 case 0:
771 return;
772 }
773 s++;
774 }
775}
776
Matthew DeVorec2694952019-06-27 15:54:11 -0700777int is_rfc3986_reserved_or_unreserved(char ch)
Jeff Kingc5051162011-12-10 05:34:20 -0500778{
Matthew DeVorec2694952019-06-27 15:54:11 -0700779 if (is_rfc3986_unreserved(ch))
780 return 1;
Jeff Kingc5051162011-12-10 05:34:20 -0500781 switch (ch) {
782 case '!': case '*': case '\'': case '(': case ')': case ';':
783 case ':': case '@': case '&': case '=': case '+': case '$':
784 case ',': case '/': case '?': case '#': case '[': case ']':
785 return 1;
786 }
787 return 0;
788}
789
Matthew DeVorec2694952019-06-27 15:54:11 -0700790int is_rfc3986_unreserved(char ch)
Jeff Kingc5051162011-12-10 05:34:20 -0500791{
792 return isalnum(ch) ||
793 ch == '-' || ch == '_' || ch == '.' || ch == '~';
794}
795
Junio C Hamanoea03a8e2012-09-15 22:43:15 -0700796static void strbuf_add_urlencode(struct strbuf *sb, const char *s, size_t len,
Matthew DeVorec2694952019-06-27 15:54:11 -0700797 char_predicate allow_unencoded_fn)
Jeff Kingc5051162011-12-10 05:34:20 -0500798{
799 strbuf_grow(sb, len);
800 while (len--) {
801 char ch = *s++;
Matthew DeVorec2694952019-06-27 15:54:11 -0700802 if (allow_unencoded_fn(ch))
Jeff Kingc5051162011-12-10 05:34:20 -0500803 strbuf_addch(sb, ch);
804 else
Julien Dusser4c267f22017-12-22 18:24:37 +0100805 strbuf_addf(sb, "%%%02x", (unsigned char)ch);
Jeff Kingc5051162011-12-10 05:34:20 -0500806 }
807}
808
809void strbuf_addstr_urlencode(struct strbuf *sb, const char *s,
Matthew DeVorec2694952019-06-27 15:54:11 -0700810 char_predicate allow_unencoded_fn)
Jeff Kingc5051162011-12-10 05:34:20 -0500811{
Matthew DeVorec2694952019-06-27 15:54:11 -0700812 strbuf_add_urlencode(sb, s, strlen(s), allow_unencoded_fn);
Jeff Kingc5051162011-12-10 05:34:20 -0500813}
Nguyễn Thái Ngọc Duy9a0a30a2012-04-23 19:30:22 +0700814
Dimitriy Ryazantcev8f354a12019-07-02 21:22:48 +0300815static void strbuf_humanise(struct strbuf *buf, off_t bytes,
816 int humanise_rate)
Antoine Pelisse079b5462013-04-10 21:03:23 +0200817{
818 if (bytes > 1 << 30) {
Dimitriy Ryazantcev8f354a12019-07-02 21:22:48 +0300819 strbuf_addf(buf,
820 humanise_rate == 0 ?
821 /* TRANSLATORS: IEC 80000-13:2008 gibibyte */
822 _("%u.%2.2u GiB") :
823 /* TRANSLATORS: IEC 80000-13:2008 gibibyte/second */
824 _("%u.%2.2u GiB/s"),
Jeff King7726d362018-07-24 06:52:29 -0400825 (unsigned)(bytes >> 30),
826 (unsigned)(bytes & ((1 << 30) - 1)) / 10737419);
Antoine Pelisse079b5462013-04-10 21:03:23 +0200827 } else if (bytes > 1 << 20) {
Jeff King7726d362018-07-24 06:52:29 -0400828 unsigned x = bytes + 5243; /* for rounding */
Dimitriy Ryazantcev8f354a12019-07-02 21:22:48 +0300829 strbuf_addf(buf,
830 humanise_rate == 0 ?
831 /* TRANSLATORS: IEC 80000-13:2008 mebibyte */
832 _("%u.%2.2u MiB") :
833 /* TRANSLATORS: IEC 80000-13:2008 mebibyte/second */
834 _("%u.%2.2u MiB/s"),
Antoine Pelisse079b5462013-04-10 21:03:23 +0200835 x >> 20, ((x & ((1 << 20) - 1)) * 100) >> 20);
836 } else if (bytes > 1 << 10) {
Jeff King7726d362018-07-24 06:52:29 -0400837 unsigned x = bytes + 5; /* for rounding */
Dimitriy Ryazantcev8f354a12019-07-02 21:22:48 +0300838 strbuf_addf(buf,
839 humanise_rate == 0 ?
840 /* TRANSLATORS: IEC 80000-13:2008 kibibyte */
841 _("%u.%2.2u KiB") :
842 /* TRANSLATORS: IEC 80000-13:2008 kibibyte/second */
843 _("%u.%2.2u KiB/s"),
Antoine Pelisse079b5462013-04-10 21:03:23 +0200844 x >> 10, ((x & ((1 << 10) - 1)) * 100) >> 10);
845 } else {
Dimitriy Ryazantcev8f354a12019-07-02 21:22:48 +0300846 strbuf_addf(buf,
847 humanise_rate == 0 ?
848 /* TRANSLATORS: IEC 80000-13:2008 byte */
849 Q_("%u byte", "%u bytes", (unsigned)bytes) :
850 /* TRANSLATORS: IEC 80000-13:2008 byte/second */
851 Q_("%u byte/s", "%u bytes/s", (unsigned)bytes),
852 (unsigned)bytes);
Antoine Pelisse079b5462013-04-10 21:03:23 +0200853 }
854}
855
Dimitriy Ryazantcev8f354a12019-07-02 21:22:48 +0300856void strbuf_humanise_bytes(struct strbuf *buf, off_t bytes)
857{
858 strbuf_humanise(buf, bytes, 0);
859}
860
861void strbuf_humanise_rate(struct strbuf *buf, off_t bytes)
862{
863 strbuf_humanise(buf, bytes, 1);
864}
865
René Scharfe679eebe2014-07-28 20:33:55 +0200866void strbuf_add_absolute_path(struct strbuf *sb, const char *path)
867{
868 if (!*path)
869 die("The empty string is not a valid path");
870 if (!is_absolute_path(path)) {
871 struct stat cwd_stat, pwd_stat;
872 size_t orig_len = sb->len;
873 char *cwd = xgetcwd();
874 char *pwd = getenv("PWD");
875 if (pwd && strcmp(pwd, cwd) &&
876 !stat(cwd, &cwd_stat) &&
877 (cwd_stat.st_dev || cwd_stat.st_ino) &&
878 !stat(pwd, &pwd_stat) &&
879 pwd_stat.st_dev == cwd_stat.st_dev &&
880 pwd_stat.st_ino == cwd_stat.st_ino)
881 strbuf_addstr(sb, pwd);
882 else
883 strbuf_addstr(sb, cwd);
884 if (sb->len > orig_len && !is_dir_sep(sb->buf[sb->len - 1]))
885 strbuf_addch(sb, '/');
886 free(cwd);
887 }
888 strbuf_addstr(sb, path);
889}
890
René Scharfe33ad9dd2017-02-25 17:00:33 +0100891void strbuf_add_real_path(struct strbuf *sb, const char *path)
892{
893 if (sb->len) {
894 struct strbuf resolved = STRBUF_INIT;
895 strbuf_realpath(&resolved, path, 1);
896 strbuf_addbuf(sb, &resolved);
897 strbuf_release(&resolved);
898 } else
899 strbuf_realpath(sb, path, 1);
900}
901
Nguyễn Thái Ngọc Duy9a0a30a2012-04-23 19:30:22 +0700902int printf_ln(const char *fmt, ...)
903{
904 int ret;
905 va_list ap;
906 va_start(ap, fmt);
907 ret = vprintf(fmt, ap);
908 va_end(ap);
909 if (ret < 0 || putchar('\n') == EOF)
910 return -1;
911 return ret + 1;
912}
913
914int fprintf_ln(FILE *fp, const char *fmt, ...)
915{
916 int ret;
917 va_list ap;
918 va_start(ap, fmt);
919 ret = vfprintf(fp, fmt, ap);
920 va_end(ap);
921 if (ret < 0 || putc('\n', fp) == EOF)
922 return -1;
923 return ret + 1;
924}
Jeff King88d5a6f2014-05-22 05:44:09 -0400925
926char *xstrdup_tolower(const char *string)
927{
928 char *result;
929 size_t len, i;
930
931 len = strlen(string);
Jeff King3733e692016-02-22 17:44:28 -0500932 result = xmallocz(len);
Jeff King88d5a6f2014-05-22 05:44:09 -0400933 for (i = 0; i < len; i++)
934 result[i] = tolower(string[i]);
Jeff King88d5a6f2014-05-22 05:44:09 -0400935 return result;
936}
Jeff King30a0ddb2014-06-18 16:01:34 -0400937
Lars Schneider13ecb4632018-02-15 16:27:06 +0100938char *xstrdup_toupper(const char *string)
939{
940 char *result;
941 size_t len, i;
942
943 len = strlen(string);
944 result = xmallocz(len);
945 for (i = 0; i < len; i++)
946 result[i] = toupper(string[i]);
Junio C Hamanod1df5742005-04-25 18:26:45 -0700947 return result;
948}
Jeff King30a0ddb2014-06-18 16:01:34 -0400949
950char *xstrvfmt(const char *fmt, va_list ap)
951{
952 struct strbuf buf = STRBUF_INIT;
953 strbuf_vaddf(&buf, fmt, ap);
954 return strbuf_detach(&buf, NULL);
955}
956
957char *xstrfmt(const char *fmt, ...)
958{
959 va_list ap;
960 char *ret;
961
962 va_start(ap, fmt);
963 ret = xstrvfmt(fmt, ap);
964 va_end(ap);
965
966 return ret;
967}
Jeff Kingaa1462c2015-06-25 12:55:45 -0400968
René Scharfec3fbf812017-06-15 14:29:53 +0200969void strbuf_addftime(struct strbuf *sb, const char *fmt, const struct tm *tm,
Ævar Arnfjörð Bjarmason3b702232017-07-01 13:15:47 +0000970 int tz_offset, int suppress_tz_name)
Jeff Kingaa1462c2015-06-25 12:55:45 -0400971{
René Scharfec3fbf812017-06-15 14:29:53 +0200972 struct strbuf munged_fmt = STRBUF_INIT;
Jeff Kinge4f031e2015-06-30 09:26:53 -0400973 size_t hint = 128;
Jeff Kingaa1462c2015-06-25 12:55:45 -0400974 size_t len;
975
Jeff Kinge4f031e2015-06-30 09:26:53 -0400976 if (!*fmt)
977 return;
978
René Scharfec3fbf812017-06-15 14:29:53 +0200979 /*
980 * There is no portable way to pass timezone information to
981 * strftime, so we handle %z and %Z here.
982 */
983 for (;;) {
984 const char *percent = strchrnul(fmt, '%');
985 strbuf_add(&munged_fmt, fmt, percent - fmt);
986 if (!*percent)
987 break;
988 fmt = percent + 1;
989 switch (*fmt) {
990 case '%':
991 strbuf_addstr(&munged_fmt, "%%");
992 fmt++;
993 break;
994 case 'z':
995 strbuf_addf(&munged_fmt, "%+05d", tz_offset);
996 fmt++;
997 break;
998 case 'Z':
Ævar Arnfjörð Bjarmason3b702232017-07-01 13:15:47 +0000999 if (suppress_tz_name) {
René Scharfec3fbf812017-06-15 14:29:53 +02001000 fmt++;
1001 break;
1002 }
1003 /* FALLTHROUGH */
1004 default:
1005 strbuf_addch(&munged_fmt, '%');
1006 }
1007 }
1008 fmt = munged_fmt.buf;
1009
Jeff Kinge4f031e2015-06-30 09:26:53 -04001010 strbuf_grow(sb, hint);
Jeff Kingaa1462c2015-06-25 12:55:45 -04001011 len = strftime(sb->buf + sb->len, sb->alloc - sb->len, fmt, tm);
1012
1013 if (!len) {
1014 /*
Jeff Kinge4f031e2015-06-30 09:26:53 -04001015 * strftime reports "0" if it could not fit the result in the buffer.
1016 * Unfortunately, it also reports "0" if the requested time string
1017 * takes 0 bytes. So our strategy is to munge the format so that the
1018 * output contains at least one character, and then drop the extra
1019 * character before returning.
Jeff Kingaa1462c2015-06-25 12:55:45 -04001020 */
René Scharfec3fbf812017-06-15 14:29:53 +02001021 strbuf_addch(&munged_fmt, ' ');
Jeff Kinge4f031e2015-06-30 09:26:53 -04001022 while (!len) {
1023 hint *= 2;
1024 strbuf_grow(sb, hint);
1025 len = strftime(sb->buf + sb->len, sb->alloc - sb->len,
1026 munged_fmt.buf, tm);
1027 }
Jeff Kinge4f031e2015-06-30 09:26:53 -04001028 len--; /* drop munged space */
Jeff Kingaa1462c2015-06-25 12:55:45 -04001029 }
René Scharfec3fbf812017-06-15 14:29:53 +02001030 strbuf_release(&munged_fmt);
Jeff Kinge4f031e2015-06-30 09:26:53 -04001031 strbuf_setlen(sb, sb->len + len);
Jeff Kingaa1462c2015-06-25 12:55:45 -04001032}
Jeff Kingaf49c6d2015-09-24 17:05:45 -04001033
brian m. carlson30e677e2018-03-12 02:27:28 +00001034void strbuf_add_unique_abbrev(struct strbuf *sb, const struct object_id *oid,
Jeff Kingaf49c6d2015-09-24 17:05:45 -04001035 int abbrev_len)
1036{
1037 int r;
brian m. carlson4b048c92018-07-16 01:27:57 +00001038 strbuf_grow(sb, GIT_MAX_HEXSZ + 1);
brian m. carlsonaab95832018-03-12 02:27:30 +00001039 r = find_unique_abbrev_r(sb->buf + sb->len, oid, abbrev_len);
Jeff Kingaf49c6d2015-09-24 17:05:45 -04001040 strbuf_setlen(sb, sb->len + r);
1041}
Junio C Hamano1ad7c0f2015-10-26 15:55:20 -07001042
Tobias Klauser63af4a82015-10-16 17:16:42 +02001043/*
1044 * Returns the length of a line, without trailing spaces.
1045 *
1046 * If the line ends with newline, it will be removed too.
1047 */
1048static size_t cleanup(char *line, size_t len)
1049{
1050 while (len) {
1051 unsigned char c = line[len - 1];
1052 if (!isspace(c))
1053 break;
1054 len--;
1055 }
1056
1057 return len;
1058}
1059
1060/*
1061 * Remove empty lines from the beginning and end
1062 * and also trailing spaces from every line.
1063 *
1064 * Turn multiple consecutive empty lines between paragraphs
1065 * into just one empty line.
1066 *
1067 * If the input has only empty lines and spaces,
1068 * no output will be produced.
1069 *
1070 * If last line does not have a newline at the end, one is added.
1071 *
1072 * Enable skip_comments to skip every line starting with comment
1073 * character.
1074 */
1075void strbuf_stripspace(struct strbuf *sb, int skip_comments)
1076{
Jeff King26114c02018-07-24 06:51:08 -04001077 size_t empties = 0;
Tobias Klauser63af4a82015-10-16 17:16:42 +02001078 size_t i, j, len, newlen;
1079 char *eol;
1080
1081 /* We may have to add a newline. */
1082 strbuf_grow(sb, 1);
1083
1084 for (i = j = 0; i < sb->len; i += len, j += newlen) {
1085 eol = memchr(sb->buf + i, '\n', sb->len - i);
1086 len = eol ? eol - (sb->buf + i) + 1 : sb->len - i;
1087
1088 if (skip_comments && len && sb->buf[i] == comment_line_char) {
1089 newlen = 0;
1090 continue;
1091 }
1092 newlen = cleanup(sb->buf + i, len);
1093
1094 /* Not just an empty line? */
1095 if (newlen) {
1096 if (empties > 0 && j > 0)
1097 sb->buf[j++] = '\n';
1098 empties = 0;
1099 memmove(sb->buf + j, sb->buf + i, newlen);
1100 sb->buf[newlen + j++] = '\n';
1101 } else {
1102 empties++;
1103 }
1104 }
1105
1106 strbuf_setlen(sb, j);
1107}
Jeff King670c3592016-10-03 16:34:17 -04001108
1109int strbuf_normalize_path(struct strbuf *src)
1110{
1111 struct strbuf dst = STRBUF_INIT;
1112
1113 strbuf_grow(&dst, src->len);
1114 if (normalize_path_copy(dst.buf, src->buf) < 0) {
1115 strbuf_release(&dst);
1116 return -1;
1117 }
1118
1119 /*
1120 * normalize_path does not tell us the new length, so we have to
1121 * compute it by looking for the new NUL it placed
1122 */
1123 strbuf_setlen(&dst, strlen(dst.buf));
1124 strbuf_swap(src, &dst);
1125 strbuf_release(&dst);
1126 return 0;
1127}