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d1df5743 JH |
1 | #ifndef STRBUF_H |
2 | #define STRBUF_H | |
b449f4cf | 3 | |
bdfdaa49 JK |
4 | /** |
5 | * strbuf's are meant to be used with all the usual C string and memory | |
6 | * APIs. Given that the length of the buffer is known, it's often better to | |
7 | * use the mem* functions than a str* one (memchr vs. strchr e.g.). | |
8 | * Though, one has to be careful about the fact that str* functions often | |
9 | * stop on NULs and that strbufs may have embedded NULs. | |
10 | * | |
11 | * A strbuf is NUL terminated for convenience, but no function in the | |
12 | * strbuf API actually relies on the string being free of NULs. | |
13 | * | |
14 | * strbufs have some invariants that are very important to keep in mind: | |
15 | * | |
aa07cac4 JK |
16 | * - The `buf` member is never NULL, so it can be used in any usual C |
17 | * string operations safely. strbuf's _have_ to be initialized either by | |
18 | * `strbuf_init()` or by `= STRBUF_INIT` before the invariants, though. | |
bdfdaa49 | 19 | * |
aa07cac4 JK |
20 | * Do *not* assume anything on what `buf` really is (e.g. if it is |
21 | * allocated memory or not), use `strbuf_detach()` to unwrap a memory | |
22 | * buffer from its strbuf shell in a safe way. That is the sole supported | |
23 | * way. This will give you a malloced buffer that you can later `free()`. | |
24 | * | |
25 | * However, it is totally safe to modify anything in the string pointed by | |
26 | * the `buf` member, between the indices `0` and `len-1` (inclusive). | |
27 | * | |
28 | * - The `buf` member is a byte array that has at least `len + 1` bytes | |
29 | * allocated. The extra byte is used to store a `'\0'`, allowing the | |
30 | * `buf` member to be a valid C-string. Every strbuf function ensure this | |
31 | * invariant is preserved. | |
32 | * | |
33 | * NOTE: It is OK to "play" with the buffer directly if you work it this | |
34 | * way: | |
35 | * | |
088c9a86 JK |
36 | * strbuf_grow(sb, SOME_SIZE); <1> |
37 | * strbuf_setlen(sb, sb->len + SOME_OTHER_SIZE); | |
38 | * | |
aa07cac4 JK |
39 | * <1> Here, the memory array starting at `sb->buf`, and of length |
40 | * `strbuf_avail(sb)` is all yours, and you can be sure that | |
41 | * `strbuf_avail(sb)` is at least `SOME_SIZE`. | |
42 | * | |
43 | * NOTE: `SOME_OTHER_SIZE` must be smaller or equal to `strbuf_avail(sb)`. | |
44 | * | |
45 | * Doing so is safe, though if it has to be done in many places, adding the | |
46 | * missing API to the strbuf module is the way to go. | |
47 | * | |
48 | * WARNING: Do _not_ assume that the area that is yours is of size `alloc | |
49 | * - 1` even if it's true in the current implementation. Alloc is somehow a | |
50 | * "private" member that should not be messed with. Use `strbuf_avail()` | |
51 | * instead. | |
52 | */ | |
b449f4cf | 53 | |
bdfdaa49 JK |
54 | /** |
55 | * Data Structures | |
56 | * --------------- | |
57 | */ | |
58 | ||
59 | /** | |
60 | * This is the string buffer structure. The `len` member can be used to | |
61 | * determine the current length of the string, and `buf` member provides | |
62 | * access to the string itself. | |
63 | */ | |
d1df5743 | 64 | struct strbuf { |
b449f4cf PH |
65 | size_t alloc; |
66 | size_t len; | |
bf0f910d | 67 | char *buf; |
d1df5743 JH |
68 | }; |
69 | ||
bdfdaa49 | 70 | extern char strbuf_slopbuf[]; |
cbc0f81d | 71 | #define STRBUF_INIT { .alloc = 0, .len = 0, .buf = strbuf_slopbuf } |
b449f4cf | 72 | |
30e677e0 | 73 | /* |
74 | * Predeclare this here, since cache.h includes this file before it defines the | |
75 | * struct. | |
76 | */ | |
77 | struct object_id; | |
78 | ||
bdfdaa49 | 79 | /** |
14e2177a JK |
80 | * Life Cycle Functions |
81 | * -------------------- | |
bdfdaa49 JK |
82 | */ |
83 | ||
84 | /** | |
85 | * Initialize the structure. The second parameter can be zero or a bigger | |
86 | * number to allocate memory, in case you want to prevent further reallocs. | |
87 | */ | |
f1696ee3 | 88 | extern void strbuf_init(struct strbuf *, size_t); |
bdfdaa49 JK |
89 | |
90 | /** | |
e0222159 JN |
91 | * Release a string buffer and the memory it used. After this call, the |
92 | * strbuf points to an empty string that does not need to be free()ed, as | |
93 | * if it had been set to `STRBUF_INIT` and never modified. | |
94 | * | |
95 | * To clear a strbuf in preparation for further use without the overhead | |
96 | * of free()ing and malloc()ing again, use strbuf_reset() instead. | |
bdfdaa49 | 97 | */ |
b449f4cf | 98 | extern void strbuf_release(struct strbuf *); |
bdfdaa49 JK |
99 | |
100 | /** | |
101 | * Detach the string from the strbuf and returns it; you now own the | |
102 | * storage the string occupies and it is your responsibility from then on | |
103 | * to release it with `free(3)` when you are done with it. | |
e0222159 JN |
104 | * |
105 | * The strbuf that previously held the string is reset to `STRBUF_INIT` so | |
106 | * it can be reused after calling this function. | |
bdfdaa49 | 107 | */ |
b315c5c0 | 108 | extern char *strbuf_detach(struct strbuf *, size_t *); |
bdfdaa49 JK |
109 | |
110 | /** | |
111 | * Attach a string to a buffer. You should specify the string to attach, | |
112 | * the current length of the string and the amount of allocated memory. | |
113 | * The amount must be larger than the string length, because the string you | |
114 | * pass is supposed to be a NUL-terminated string. This string _must_ be | |
115 | * malloc()ed, and after attaching, the pointer cannot be relied upon | |
116 | * anymore, and neither be free()d directly. | |
117 | */ | |
917c9a71 | 118 | extern void strbuf_attach(struct strbuf *, void *, size_t, size_t); |
bdfdaa49 JK |
119 | |
120 | /** | |
121 | * Swap the contents of two string buffers. | |
122 | */ | |
187e290a NTND |
123 | static inline void strbuf_swap(struct strbuf *a, struct strbuf *b) |
124 | { | |
35d803bc | 125 | SWAP(*a, *b); |
c76689df | 126 | } |
b449f4cf | 127 | |
bdfdaa49 JK |
128 | |
129 | /** | |
14e2177a JK |
130 | * Functions related to the size of the buffer |
131 | * ------------------------------------------- | |
bdfdaa49 JK |
132 | */ |
133 | ||
134 | /** | |
135 | * Determine the amount of allocated but unused memory. | |
136 | */ | |
187e290a NTND |
137 | static inline size_t strbuf_avail(const struct strbuf *sb) |
138 | { | |
c76689df | 139 | return sb->alloc ? sb->alloc - sb->len - 1 : 0; |
b449f4cf | 140 | } |
a8f3e221 | 141 | |
bdfdaa49 JK |
142 | /** |
143 | * Ensure that at least this amount of unused memory is available after | |
144 | * `len`. This is used when you know a typical size for what you will add | |
145 | * and want to avoid repetitive automatic resizing of the underlying buffer. | |
146 | * This is never a needed operation, but can be critical for performance in | |
147 | * some cases. | |
148 | */ | |
a8f3e221 JH |
149 | extern void strbuf_grow(struct strbuf *, size_t); |
150 | ||
bdfdaa49 JK |
151 | /** |
152 | * Set the length of the buffer to a given value. This function does *not* | |
153 | * allocate new memory, so you should not perform a `strbuf_setlen()` to a | |
154 | * length that is larger than `len + strbuf_avail()`. `strbuf_setlen()` is | |
155 | * just meant as a 'please fix invariants from this strbuf I just messed | |
156 | * with'. | |
157 | */ | |
187e290a NTND |
158 | static inline void strbuf_setlen(struct strbuf *sb, size_t len) |
159 | { | |
7141efab RS |
160 | if (len > (sb->alloc ? sb->alloc - 1 : 0)) |
161 | die("BUG: strbuf_setlen() beyond buffer"); | |
c76689df | 162 | sb->len = len; |
65961d5a MÅ |
163 | if (sb->buf != strbuf_slopbuf) |
164 | sb->buf[len] = '\0'; | |
165 | else | |
166 | assert(!strbuf_slopbuf[0]); | |
b449f4cf | 167 | } |
bdfdaa49 JK |
168 | |
169 | /** | |
170 | * Empty the buffer by setting the size of it to zero. | |
171 | */ | |
b315c5c0 | 172 | #define strbuf_reset(sb) strbuf_setlen(sb, 0) |
b449f4cf | 173 | |
bdfdaa49 JK |
174 | |
175 | /** | |
14e2177a JK |
176 | * Functions related to the contents of the buffer |
177 | * ----------------------------------------------- | |
bdfdaa49 JK |
178 | */ |
179 | ||
180 | /** | |
d468fa27 JK |
181 | * Strip whitespace from the beginning (`ltrim`), end (`rtrim`), or both side |
182 | * (`trim`) of a string. | |
bdfdaa49 | 183 | */ |
eacd6dc5 | 184 | extern void strbuf_trim(struct strbuf *); |
f1696ee3 | 185 | extern void strbuf_rtrim(struct strbuf *); |
eacd6dc5 | 186 | extern void strbuf_ltrim(struct strbuf *); |
bdfdaa49 | 187 | |
c64a8d20 NTND |
188 | /* Strip trailing directory separators */ |
189 | extern void strbuf_trim_trailing_dir_sep(struct strbuf *); | |
190 | ||
bdfdaa49 JK |
191 | /** |
192 | * Replace the contents of the strbuf with a reencoded form. Returns -1 | |
193 | * on error, 0 on success. | |
194 | */ | |
d4241f52 | 195 | extern int strbuf_reencode(struct strbuf *sb, const char *from, const char *to); |
bdfdaa49 JK |
196 | |
197 | /** | |
198 | * Lowercase each character in the buffer using `tolower`. | |
199 | */ | |
ffb20ce1 | 200 | extern void strbuf_tolower(struct strbuf *sb); |
bdfdaa49 JK |
201 | |
202 | /** | |
203 | * Compare two buffers. Returns an integer less than, equal to, or greater | |
204 | * than zero if the first buffer is found, respectively, to be less than, | |
205 | * to match, or be greater than the second buffer. | |
206 | */ | |
9b200fd6 | 207 | extern int strbuf_cmp(const struct strbuf *, const struct strbuf *); |
eacd6dc5 | 208 | |
bdfdaa49 JK |
209 | |
210 | /** | |
14e2177a JK |
211 | * Adding data to the buffer |
212 | * ------------------------- | |
bdfdaa49 JK |
213 | * |
214 | * NOTE: All of the functions in this section will grow the buffer as | |
215 | * necessary. If they fail for some reason other than memory shortage and the | |
216 | * buffer hadn't been allocated before (i.e. the `struct strbuf` was set to | |
217 | * `STRBUF_INIT`), then they will free() it. | |
218 | */ | |
219 | ||
220 | /** | |
221 | * Add a single character to the buffer. | |
222 | */ | |
223 | static inline void strbuf_addch(struct strbuf *sb, int c) | |
224 | { | |
fec501da JK |
225 | if (!strbuf_avail(sb)) |
226 | strbuf_grow(sb, 1); | |
bdfdaa49 JK |
227 | sb->buf[sb->len++] = c; |
228 | sb->buf[sb->len] = '\0'; | |
229 | } | |
230 | ||
231 | /** | |
232 | * Add a character the specified number of times to the buffer. | |
233 | */ | |
234 | extern void strbuf_addchars(struct strbuf *sb, int c, size_t n); | |
235 | ||
236 | /** | |
237 | * Insert data to the given position of the buffer. The remaining contents | |
238 | * will be shifted, not overwritten. | |
239 | */ | |
240 | extern void strbuf_insert(struct strbuf *, size_t pos, const void *, size_t); | |
241 | ||
242 | /** | |
243 | * Remove given amount of data from a given position of the buffer. | |
244 | */ | |
245 | extern void strbuf_remove(struct strbuf *, size_t pos, size_t len); | |
246 | ||
247 | /** | |
248 | * Remove the bytes between `pos..pos+len` and replace it with the given | |
249 | * data. | |
250 | */ | |
251 | extern void strbuf_splice(struct strbuf *, size_t pos, size_t len, | |
252 | const void *, size_t); | |
253 | ||
254 | /** | |
255 | * Add a NUL-terminated string to the buffer. Each line will be prepended | |
256 | * by a comment character and a blank. | |
257 | */ | |
258 | extern void strbuf_add_commented_lines(struct strbuf *out, const char *buf, size_t size); | |
259 | ||
260 | ||
261 | /** | |
262 | * Add data of given length to the buffer. | |
263 | */ | |
264 | extern void strbuf_add(struct strbuf *, const void *, size_t); | |
265 | ||
266 | /** | |
267 | * Add a NUL-terminated string to the buffer. | |
268 | * | |
269 | * NOTE: This function will *always* be implemented as an inline or a macro | |
270 | * using strlen, meaning that this is efficient to write things like: | |
271 | * | |
088c9a86 | 272 | * strbuf_addstr(sb, "immediate string"); |
bdfdaa49 JK |
273 | * |
274 | */ | |
275 | static inline void strbuf_addstr(struct strbuf *sb, const char *s) | |
276 | { | |
277 | strbuf_add(sb, s, strlen(s)); | |
278 | } | |
279 | ||
280 | /** | |
281 | * Copy the contents of another buffer at the end of the current one. | |
282 | */ | |
31471ba2 | 283 | extern void strbuf_addbuf(struct strbuf *sb, const struct strbuf *sb2); |
bdfdaa49 | 284 | |
bdfdaa49 JK |
285 | /** |
286 | * This function can be used to expand a format string containing | |
287 | * placeholders. To that end, it parses the string and calls the specified | |
288 | * function for every percent sign found. | |
289 | * | |
290 | * The callback function is given a pointer to the character after the `%` | |
291 | * and a pointer to the struct strbuf. It is expected to add the expanded | |
292 | * version of the placeholder to the strbuf, e.g. to add a newline | |
293 | * character if the letter `n` appears after a `%`. The function returns | |
294 | * the length of the placeholder recognized and `strbuf_expand()` skips | |
295 | * over it. | |
296 | * | |
297 | * The format `%%` is automatically expanded to a single `%` as a quoting | |
298 | * mechanism; callers do not need to handle the `%` placeholder themselves, | |
299 | * and the callback function will not be invoked for this placeholder. | |
300 | * | |
301 | * All other characters (non-percent and not skipped ones) are copied | |
302 | * verbatim to the strbuf. If the callback returned zero, meaning that the | |
303 | * placeholder is unknown, then the percent sign is copied, too. | |
304 | * | |
305 | * In order to facilitate caching and to make it possible to give | |
306 | * parameters to the callback, `strbuf_expand()` passes a context pointer, | |
307 | * which can be used by the programmer of the callback as she sees fit. | |
308 | */ | |
309 | typedef size_t (*expand_fn_t) (struct strbuf *sb, const char *placeholder, void *context); | |
310 | extern void strbuf_expand(struct strbuf *sb, const char *format, expand_fn_t fn, void *context); | |
311 | ||
312 | /** | |
313 | * Used as callback for `strbuf_expand()`, expects an array of | |
314 | * struct strbuf_expand_dict_entry as context, i.e. pairs of | |
315 | * placeholder and replacement string. The array needs to be | |
316 | * terminated by an entry with placeholder set to NULL. | |
317 | */ | |
318 | struct strbuf_expand_dict_entry { | |
319 | const char *placeholder; | |
320 | const char *value; | |
321 | }; | |
322 | extern size_t strbuf_expand_dict_cb(struct strbuf *sb, const char *placeholder, void *context); | |
323 | ||
324 | /** | |
325 | * Append the contents of one strbuf to another, quoting any | |
326 | * percent signs ("%") into double-percents ("%%") in the | |
327 | * destination. This is useful for literal data to be fed to either | |
328 | * strbuf_expand or to the *printf family of functions. | |
329 | */ | |
330 | extern void strbuf_addbuf_percentquote(struct strbuf *dst, const struct strbuf *src); | |
331 | ||
332 | /** | |
333 | * Append the given byte size as a human-readable string (i.e. 12.23 KiB, | |
334 | * 3.50 MiB). | |
335 | */ | |
336 | extern void strbuf_humanise_bytes(struct strbuf *buf, off_t bytes); | |
337 | ||
338 | /** | |
339 | * Add a formatted string to the buffer. | |
340 | */ | |
341 | __attribute__((format (printf,2,3))) | |
342 | extern void strbuf_addf(struct strbuf *sb, const char *fmt, ...); | |
343 | ||
344 | /** | |
345 | * Add a formatted string prepended by a comment character and a | |
346 | * blank to the buffer. | |
347 | */ | |
348 | __attribute__((format (printf, 2, 3))) | |
349 | extern void strbuf_commented_addf(struct strbuf *sb, const char *fmt, ...); | |
350 | ||
351 | __attribute__((format (printf,2,0))) | |
352 | extern void strbuf_vaddf(struct strbuf *sb, const char *fmt, va_list ap); | |
353 | ||
aa1462cc JK |
354 | /** |
355 | * Add the time specified by `tm`, as formatted by `strftime`. | |
c3fbf81a RS |
356 | * `tz_offset` is in decimal hhmm format, e.g. -600 means six hours west |
357 | * of Greenwich, and it's used to expand %z internally. However, tokens | |
358 | * with modifiers (e.g. %Ez) are passed to `strftime`. | |
3b702239 ÆAB |
359 | * `suppress_tz_name`, when set, expands %Z internally to the empty |
360 | * string rather than passing it to `strftime`. | |
c3fbf81a RS |
361 | */ |
362 | extern void strbuf_addftime(struct strbuf *sb, const char *fmt, | |
363 | const struct tm *tm, int tz_offset, | |
3b702239 | 364 | int suppress_tz_name); |
aa1462cc | 365 | |
bdfdaa49 JK |
366 | /** |
367 | * Read a given size of data from a FILE* pointer to the buffer. | |
368 | * | |
369 | * NOTE: The buffer is rewound if the read fails. If -1 is returned, | |
370 | * `errno` must be consulted, like you would do for `read(3)`. | |
1a0c8dfd JH |
371 | * `strbuf_read()`, `strbuf_read_file()` and `strbuf_getline_*()` |
372 | * family of functions have the same behaviour as well. | |
bdfdaa49 JK |
373 | */ |
374 | extern size_t strbuf_fread(struct strbuf *, size_t, FILE *); | |
375 | ||
376 | /** | |
377 | * Read the contents of a given file descriptor. The third argument can be | |
378 | * used to give a hint about the file size, to avoid reallocs. If read fails, | |
379 | * any partial read is undone. | |
380 | */ | |
381 | extern ssize_t strbuf_read(struct strbuf *, int fd, size_t hint); | |
382 | ||
b4e04fb6 SB |
383 | /** |
384 | * Read the contents of a given file descriptor partially by using only one | |
385 | * attempt of xread. The third argument can be used to give a hint about the | |
386 | * file size, to avoid reallocs. Returns the number of new bytes appended to | |
387 | * the sb. | |
388 | */ | |
389 | extern ssize_t strbuf_read_once(struct strbuf *, int fd, size_t hint); | |
390 | ||
bdfdaa49 JK |
391 | /** |
392 | * Read the contents of a file, specified by its path. The third argument | |
393 | * can be used to give a hint about the file size, to avoid reallocs. | |
ed008d7b PB |
394 | * Return the number of bytes read or a negative value if some error |
395 | * occurred while opening or reading the file. | |
bdfdaa49 | 396 | */ |
6c8afe49 | 397 | extern ssize_t strbuf_read_file(struct strbuf *sb, const char *path, size_t hint); |
bdfdaa49 JK |
398 | |
399 | /** | |
400 | * Read the target of a symbolic link, specified by its path. The third | |
401 | * argument can be used to give a hint about the size, to avoid reallocs. | |
402 | */ | |
403 | extern int strbuf_readlink(struct strbuf *sb, const char *path, size_t hint); | |
404 | ||
2dac9b56 SB |
405 | /** |
406 | * Write the whole content of the strbuf to the stream not stopping at | |
407 | * NUL bytes. | |
408 | */ | |
409 | extern ssize_t strbuf_write(struct strbuf *sb, FILE *stream); | |
410 | ||
bdfdaa49 | 411 | /** |
1a0c8dfd JH |
412 | * Read a line from a FILE *, overwriting the existing contents of |
413 | * the strbuf. The strbuf_getline*() family of functions share | |
414 | * this signature, but have different line termination conventions. | |
415 | * | |
bdfdaa49 JK |
416 | * Reading stops after the terminator or at EOF. The terminator |
417 | * is removed from the buffer before returning. Returns 0 unless | |
418 | * there was nothing left before EOF, in which case it returns `EOF`. | |
419 | */ | |
8f309aeb JH |
420 | typedef int (*strbuf_getline_fn)(struct strbuf *, FILE *); |
421 | ||
422 | /* Uses LF as the line terminator */ | |
423 | extern int strbuf_getline_lf(struct strbuf *sb, FILE *fp); | |
424 | ||
425 | /* Uses NUL as the line terminator */ | |
426 | extern int strbuf_getline_nul(struct strbuf *sb, FILE *fp); | |
427 | ||
c8aa9fdf | 428 | /* |
8f309aeb JH |
429 | * Similar to strbuf_getline_lf(), but additionally treats a CR that |
430 | * comes immediately before the LF as part of the terminator. | |
1a0c8dfd JH |
431 | * This is the most friendly version to be used to read "text" files |
432 | * that can come from platforms whose native text format is CRLF | |
433 | * terminated. | |
c8aa9fdf | 434 | */ |
1a0c8dfd | 435 | extern int strbuf_getline(struct strbuf *, FILE *); |
c8aa9fdf | 436 | |
bdfdaa49 JK |
437 | |
438 | /** | |
439 | * Like `strbuf_getline`, but keeps the trailing terminator (if | |
440 | * any) in the buffer. | |
441 | */ | |
442 | extern int strbuf_getwholeline(struct strbuf *, FILE *, int); | |
443 | ||
444 | /** | |
445 | * Like `strbuf_getwholeline`, but operates on a file descriptor. | |
446 | * It reads one character at a time, so it is very slow. Do not | |
447 | * use it unless you need the correct position in the file | |
448 | * descriptor. | |
449 | */ | |
450 | extern int strbuf_getwholeline_fd(struct strbuf *, int, int); | |
451 | ||
452 | /** | |
453 | * Set the buffer to the path of the current working directory. | |
454 | */ | |
455 | extern int strbuf_getcwd(struct strbuf *sb); | |
456 | ||
457 | /** | |
458 | * Add a path to a buffer, converting a relative path to an | |
459 | * absolute one in the process. Symbolic links are not | |
460 | * resolved. | |
461 | */ | |
462 | extern void strbuf_add_absolute_path(struct strbuf *sb, const char *path); | |
463 | ||
33ad9ddd RS |
464 | /** |
465 | * Canonize `path` (make it absolute, resolve symlinks, remove extra | |
466 | * slashes) and append it to `sb`. Die with an informative error | |
467 | * message if there is a problem. | |
468 | * | |
469 | * The directory part of `path` (i.e., everything up to the last | |
470 | * dir_sep) must denote a valid, existing directory, but the last | |
471 | * component need not exist. | |
472 | * | |
473 | * Callers that don't mind links should use the more lightweight | |
474 | * strbuf_add_absolute_path() instead. | |
475 | */ | |
476 | extern void strbuf_add_real_path(struct strbuf *sb, const char *path); | |
477 | ||
670c359d JK |
478 | |
479 | /** | |
480 | * Normalize in-place the path contained in the strbuf. See | |
481 | * normalize_path_copy() for details. If an error occurs, the contents of "sb" | |
482 | * are left untouched, and -1 is returned. | |
483 | */ | |
484 | extern int strbuf_normalize_path(struct strbuf *sb); | |
485 | ||
bdfdaa49 JK |
486 | /** |
487 | * Strip whitespace from a buffer. The second parameter controls if | |
488 | * comments are considered contents to be removed or not. | |
489 | */ | |
63af4a84 TK |
490 | extern void strbuf_stripspace(struct strbuf *buf, int skip_comments); |
491 | ||
6dda4e60 JK |
492 | static inline int strbuf_strip_suffix(struct strbuf *sb, const char *suffix) |
493 | { | |
494 | if (strip_suffix_mem(sb->buf, &sb->len, suffix)) { | |
495 | strbuf_setlen(sb, sb->len); | |
496 | return 1; | |
497 | } else | |
498 | return 0; | |
499 | } | |
500 | ||
6afbbdda | 501 | /** |
06379a65 MH |
502 | * Split str (of length slen) at the specified terminator character. |
503 | * Return a null-terminated array of pointers to strbuf objects | |
504 | * holding the substrings. The substrings include the terminator, | |
505 | * except for the last substring, which might be unterminated if the | |
506 | * original string did not end with a terminator. If max is positive, | |
507 | * then split the string into at most max substrings (with the last | |
508 | * substring containing everything following the (max-1)th terminator | |
509 | * character). | |
510 | * | |
f20e56e2 JK |
511 | * The most generic form is `strbuf_split_buf`, which takes an arbitrary |
512 | * pointer/len buffer. The `_str` variant takes a NUL-terminated string, | |
513 | * the `_max` variant takes a strbuf, and just `strbuf_split` is a convenience | |
514 | * wrapper to drop the `max` parameter. | |
515 | * | |
06379a65 MH |
516 | * For lighter-weight alternatives, see string_list_split() and |
517 | * string_list_split_in_place(). | |
518 | */ | |
2f1d9e2b | 519 | extern struct strbuf **strbuf_split_buf(const char *, size_t, |
17b73dc6 | 520 | int terminator, int max); |
06379a65 | 521 | |
2f1d9e2b | 522 | static inline struct strbuf **strbuf_split_str(const char *str, |
17b73dc6 | 523 | int terminator, int max) |
2f1d9e2b | 524 | { |
17b73dc6 | 525 | return strbuf_split_buf(str, strlen(str), terminator, max); |
2f1d9e2b | 526 | } |
06379a65 | 527 | |
2f1d9e2b | 528 | static inline struct strbuf **strbuf_split_max(const struct strbuf *sb, |
17b73dc6 | 529 | int terminator, int max) |
2f1d9e2b | 530 | { |
17b73dc6 | 531 | return strbuf_split_buf(sb->buf, sb->len, terminator, max); |
2f1d9e2b | 532 | } |
06379a65 | 533 | |
17b73dc6 MH |
534 | static inline struct strbuf **strbuf_split(const struct strbuf *sb, |
535 | int terminator) | |
28fc3a68 | 536 | { |
17b73dc6 | 537 | return strbuf_split_max(sb, terminator, 0); |
28fc3a68 | 538 | } |
06379a65 | 539 | |
6afbbdda | 540 | /** |
06379a65 MH |
541 | * Free a NULL-terminated list of strbufs (for example, the return |
542 | * values of the strbuf_split*() functions). | |
543 | */ | |
eacd6dc5 | 544 | extern void strbuf_list_free(struct strbuf **); |
f1696ee3 | 545 | |
af49c6d0 JK |
546 | /** |
547 | * Add the abbreviation, as generated by find_unique_abbrev, of `sha1` to | |
548 | * the strbuf `sb`. | |
549 | */ | |
550 | extern void strbuf_add_unique_abbrev(struct strbuf *sb, | |
30e677e0 | 551 | const struct object_id *oid, |
af49c6d0 JK |
552 | int abbrev_len); |
553 | ||
bdfdaa49 JK |
554 | /** |
555 | * Launch the user preferred editor to edit a file and fill the buffer | |
556 | * with the file's contents upon the user completing their editing. The | |
557 | * third argument can be used to set the environment which the editor is | |
558 | * run in. If the buffer is NULL the editor is launched as usual but the | |
559 | * file's contents are not read into the buffer upon completion. | |
560 | */ | |
561 | extern int launch_editor(const char *path, struct strbuf *buffer, const char *const *env); | |
b449f4cf | 562 | |
895680f0 JH |
563 | extern void strbuf_add_lines(struct strbuf *sb, const char *prefix, const char *buf, size_t size); |
564 | ||
6afbbdda | 565 | /** |
5963c036 MH |
566 | * Append s to sb, with the characters '<', '>', '&' and '"' converted |
567 | * into XML entities. | |
568 | */ | |
569 | extern void strbuf_addstr_xml_quoted(struct strbuf *sb, const char *s); | |
570 | ||
399ad553 JK |
571 | /** |
572 | * "Complete" the contents of `sb` by ensuring that either it ends with the | |
573 | * character `term`, or it is empty. This can be used, for example, | |
574 | * to ensure that text ends with a newline, but without creating an empty | |
575 | * blank line if there is no content in the first place. | |
576 | */ | |
577 | static inline void strbuf_complete(struct strbuf *sb, char term) | |
578 | { | |
579 | if (sb->len && sb->buf[sb->len - 1] != term) | |
580 | strbuf_addch(sb, term); | |
581 | } | |
582 | ||
895680f0 JH |
583 | static inline void strbuf_complete_line(struct strbuf *sb) |
584 | { | |
399ad553 | 585 | strbuf_complete(sb, '\n'); |
895680f0 JH |
586 | } |
587 | ||
0705fe20 JK |
588 | /* |
589 | * Copy "name" to "sb", expanding any special @-marks as handled by | |
590 | * interpret_branch_name(). The result is a non-qualified branch name | |
591 | * (so "foo" or "origin/master" instead of "refs/heads/foo" or | |
592 | * "refs/remotes/origin/master"). | |
593 | * | |
594 | * Note that the resulting name may not be a syntactically valid refname. | |
0e9f62da JK |
595 | * |
596 | * If "allowed" is non-zero, restrict the set of allowed expansions. See | |
597 | * interpret_branch_name() for details. | |
0705fe20 | 598 | */ |
0e9f62da JK |
599 | extern void strbuf_branchname(struct strbuf *sb, const char *name, |
600 | unsigned allowed); | |
0705fe20 JK |
601 | |
602 | /* | |
603 | * Like strbuf_branchname() above, but confirm that the result is | |
604 | * syntactically valid to be used as a local branch name in refs/heads/. | |
605 | * | |
606 | * The return value is "0" if the result is valid, and "-1" otherwise. | |
607 | */ | |
a2fab531 | 608 | extern int strbuf_check_branch_ref(struct strbuf *sb, const char *name); |
a552de75 | 609 | |
c505116b JK |
610 | extern void strbuf_addstr_urlencode(struct strbuf *, const char *, |
611 | int reserved); | |
679eebe2 | 612 | |
9a0a30aa NTND |
613 | __attribute__((format (printf,1,2))) |
614 | extern int printf_ln(const char *fmt, ...); | |
615 | __attribute__((format (printf,2,3))) | |
616 | extern int fprintf_ln(FILE *fp, const char *fmt, ...); | |
617 | ||
88d5a6f6 JK |
618 | char *xstrdup_tolower(const char *); |
619 | ||
6afbbdda | 620 | /** |
30a0ddb7 JK |
621 | * Create a newly allocated string using printf format. You can do this easily |
622 | * with a strbuf, but this provides a shortcut to save a few lines. | |
623 | */ | |
624 | __attribute__((format (printf, 1, 0))) | |
625 | char *xstrvfmt(const char *fmt, va_list ap); | |
626 | __attribute__((format (printf, 1, 2))) | |
627 | char *xstrfmt(const char *fmt, ...); | |
628 | ||
d1df5743 | 629 | #endif /* STRBUF_H */ |