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1 | #ifndef STRBUF_H | |
2 | #define STRBUF_H | |
3 | ||
4 | struct string_list; | |
5 | ||
6 | /** | |
7 | * strbuf's are meant to be used with all the usual C string and memory | |
8 | * APIs. Given that the length of the buffer is known, it's often better to | |
9 | * use the mem* functions than a str* one (memchr vs. strchr e.g.). | |
10 | * Though, one has to be careful about the fact that str* functions often | |
11 | * stop on NULs and that strbufs may have embedded NULs. | |
12 | * | |
13 | * A strbuf is NUL terminated for convenience, but no function in the | |
14 | * strbuf API actually relies on the string being free of NULs. | |
15 | * | |
16 | * strbufs have some invariants that are very important to keep in mind: | |
17 | * | |
18 | * - The `buf` member is never NULL, so it can be used in any usual C | |
19 | * string operations safely. strbuf's _have_ to be initialized either by | |
20 | * `strbuf_init()` or by `= STRBUF_INIT` before the invariants, though. | |
21 | * | |
22 | * Do *not* assume anything on what `buf` really is (e.g. if it is | |
23 | * allocated memory or not), use `strbuf_detach()` to unwrap a memory | |
24 | * buffer from its strbuf shell in a safe way. That is the sole supported | |
25 | * way. This will give you a malloced buffer that you can later `free()`. | |
26 | * | |
27 | * However, it is totally safe to modify anything in the string pointed by | |
28 | * the `buf` member, between the indices `0` and `len-1` (inclusive). | |
29 | * | |
30 | * - The `buf` member is a byte array that has at least `len + 1` bytes | |
31 | * allocated. The extra byte is used to store a `'\0'`, allowing the | |
32 | * `buf` member to be a valid C-string. Every strbuf function ensure this | |
33 | * invariant is preserved. | |
34 | * | |
35 | * NOTE: It is OK to "play" with the buffer directly if you work it this | |
36 | * way: | |
37 | * | |
38 | * strbuf_grow(sb, SOME_SIZE); <1> | |
39 | * strbuf_setlen(sb, sb->len + SOME_OTHER_SIZE); | |
40 | * | |
41 | * <1> Here, the memory array starting at `sb->buf`, and of length | |
42 | * `strbuf_avail(sb)` is all yours, and you can be sure that | |
43 | * `strbuf_avail(sb)` is at least `SOME_SIZE`. | |
44 | * | |
45 | * NOTE: `SOME_OTHER_SIZE` must be smaller or equal to `strbuf_avail(sb)`. | |
46 | * | |
47 | * Doing so is safe, though if it has to be done in many places, adding the | |
48 | * missing API to the strbuf module is the way to go. | |
49 | * | |
50 | * WARNING: Do _not_ assume that the area that is yours is of size `alloc | |
51 | * - 1` even if it's true in the current implementation. Alloc is somehow a | |
52 | * "private" member that should not be messed with. Use `strbuf_avail()` | |
53 | * instead. | |
54 | */ | |
55 | ||
56 | /** | |
57 | * Data Structures | |
58 | * --------------- | |
59 | */ | |
60 | ||
61 | /** | |
62 | * This is the string buffer structure. The `len` member can be used to | |
63 | * determine the current length of the string, and `buf` member provides | |
64 | * access to the string itself. | |
65 | */ | |
66 | struct strbuf { | |
67 | size_t alloc; | |
68 | size_t len; | |
69 | char *buf; | |
70 | }; | |
71 | ||
72 | extern char strbuf_slopbuf[]; | |
73 | #define STRBUF_INIT { .alloc = 0, .len = 0, .buf = strbuf_slopbuf } | |
74 | ||
75 | /* | |
76 | * Predeclare this here, since cache.h includes this file before it defines the | |
77 | * struct. | |
78 | */ | |
79 | struct object_id; | |
80 | ||
81 | /** | |
82 | * Life Cycle Functions | |
83 | * -------------------- | |
84 | */ | |
85 | ||
86 | /** | |
87 | * Initialize the structure. The second parameter can be zero or a bigger | |
88 | * number to allocate memory, in case you want to prevent further reallocs. | |
89 | */ | |
90 | void strbuf_init(struct strbuf *sb, size_t alloc); | |
91 | ||
92 | /** | |
93 | * Release a string buffer and the memory it used. After this call, the | |
94 | * strbuf points to an empty string that does not need to be free()ed, as | |
95 | * if it had been set to `STRBUF_INIT` and never modified. | |
96 | * | |
97 | * To clear a strbuf in preparation for further use without the overhead | |
98 | * of free()ing and malloc()ing again, use strbuf_reset() instead. | |
99 | */ | |
100 | void strbuf_release(struct strbuf *sb); | |
101 | ||
102 | /** | |
103 | * Detach the string from the strbuf and returns it; you now own the | |
104 | * storage the string occupies and it is your responsibility from then on | |
105 | * to release it with `free(3)` when you are done with it. | |
106 | * | |
107 | * The strbuf that previously held the string is reset to `STRBUF_INIT` so | |
108 | * it can be reused after calling this function. | |
109 | */ | |
110 | char *strbuf_detach(struct strbuf *sb, size_t *sz); | |
111 | ||
112 | /** | |
113 | * Attach a string to a buffer. You should specify the string to attach, | |
114 | * the current length of the string and the amount of allocated memory. | |
115 | * The amount must be larger than the string length, because the string you | |
116 | * pass is supposed to be a NUL-terminated string. This string _must_ be | |
117 | * malloc()ed, and after attaching, the pointer cannot be relied upon | |
118 | * anymore, and neither be free()d directly. | |
119 | */ | |
120 | void strbuf_attach(struct strbuf *sb, void *str, size_t len, size_t mem); | |
121 | ||
122 | /** | |
123 | * Swap the contents of two string buffers. | |
124 | */ | |
125 | static inline void strbuf_swap(struct strbuf *a, struct strbuf *b) | |
126 | { | |
127 | SWAP(*a, *b); | |
128 | } | |
129 | ||
130 | ||
131 | /** | |
132 | * Functions related to the size of the buffer | |
133 | * ------------------------------------------- | |
134 | */ | |
135 | ||
136 | /** | |
137 | * Determine the amount of allocated but unused memory. | |
138 | */ | |
139 | static inline size_t strbuf_avail(const struct strbuf *sb) | |
140 | { | |
141 | return sb->alloc ? sb->alloc - sb->len - 1 : 0; | |
142 | } | |
143 | ||
144 | /** | |
145 | * Ensure that at least this amount of unused memory is available after | |
146 | * `len`. This is used when you know a typical size for what you will add | |
147 | * and want to avoid repetitive automatic resizing of the underlying buffer. | |
148 | * This is never a needed operation, but can be critical for performance in | |
149 | * some cases. | |
150 | */ | |
151 | void strbuf_grow(struct strbuf *sb, size_t amount); | |
152 | ||
153 | /** | |
154 | * Set the length of the buffer to a given value. This function does *not* | |
155 | * allocate new memory, so you should not perform a `strbuf_setlen()` to a | |
156 | * length that is larger than `len + strbuf_avail()`. `strbuf_setlen()` is | |
157 | * just meant as a 'please fix invariants from this strbuf I just messed | |
158 | * with'. | |
159 | */ | |
160 | static inline void strbuf_setlen(struct strbuf *sb, size_t len) | |
161 | { | |
162 | if (len > (sb->alloc ? sb->alloc - 1 : 0)) | |
163 | die("BUG: strbuf_setlen() beyond buffer"); | |
164 | sb->len = len; | |
165 | if (sb->buf != strbuf_slopbuf) | |
166 | sb->buf[len] = '\0'; | |
167 | else | |
168 | assert(!strbuf_slopbuf[0]); | |
169 | } | |
170 | ||
171 | /** | |
172 | * Empty the buffer by setting the size of it to zero. | |
173 | */ | |
174 | #define strbuf_reset(sb) strbuf_setlen(sb, 0) | |
175 | ||
176 | ||
177 | /** | |
178 | * Functions related to the contents of the buffer | |
179 | * ----------------------------------------------- | |
180 | */ | |
181 | ||
182 | /** | |
183 | * Strip whitespace from the beginning (`ltrim`), end (`rtrim`), or both side | |
184 | * (`trim`) of a string. | |
185 | */ | |
186 | void strbuf_trim(struct strbuf *sb); | |
187 | void strbuf_rtrim(struct strbuf *sb); | |
188 | void strbuf_ltrim(struct strbuf *sb); | |
189 | ||
190 | /* Strip trailing directory separators */ | |
191 | void strbuf_trim_trailing_dir_sep(struct strbuf *sb); | |
192 | ||
193 | /* Strip trailing LF or CR/LF */ | |
194 | void strbuf_trim_trailing_newline(struct strbuf *sb); | |
195 | ||
196 | /** | |
197 | * Replace the contents of the strbuf with a reencoded form. Returns -1 | |
198 | * on error, 0 on success. | |
199 | */ | |
200 | int strbuf_reencode(struct strbuf *sb, const char *from, const char *to); | |
201 | ||
202 | /** | |
203 | * Lowercase each character in the buffer using `tolower`. | |
204 | */ | |
205 | void strbuf_tolower(struct strbuf *sb); | |
206 | ||
207 | /** | |
208 | * Compare two buffers. Returns an integer less than, equal to, or greater | |
209 | * than zero if the first buffer is found, respectively, to be less than, | |
210 | * to match, or be greater than the second buffer. | |
211 | */ | |
212 | int strbuf_cmp(const struct strbuf *first, const struct strbuf *second); | |
213 | ||
214 | ||
215 | /** | |
216 | * Adding data to the buffer | |
217 | * ------------------------- | |
218 | * | |
219 | * NOTE: All of the functions in this section will grow the buffer as | |
220 | * necessary. If they fail for some reason other than memory shortage and the | |
221 | * buffer hadn't been allocated before (i.e. the `struct strbuf` was set to | |
222 | * `STRBUF_INIT`), then they will free() it. | |
223 | */ | |
224 | ||
225 | /** | |
226 | * Add a single character to the buffer. | |
227 | */ | |
228 | static inline void strbuf_addch(struct strbuf *sb, int c) | |
229 | { | |
230 | if (!strbuf_avail(sb)) | |
231 | strbuf_grow(sb, 1); | |
232 | sb->buf[sb->len++] = c; | |
233 | sb->buf[sb->len] = '\0'; | |
234 | } | |
235 | ||
236 | /** | |
237 | * Add a character the specified number of times to the buffer. | |
238 | */ | |
239 | void strbuf_addchars(struct strbuf *sb, int c, size_t n); | |
240 | ||
241 | /** | |
242 | * Insert data to the given position of the buffer. The remaining contents | |
243 | * will be shifted, not overwritten. | |
244 | */ | |
245 | void strbuf_insert(struct strbuf *sb, size_t pos, const void *, size_t); | |
246 | ||
247 | /** | |
248 | * Insert data to the given position of the buffer giving a printf format | |
249 | * string. The contents will be shifted, not overwritten. | |
250 | */ | |
251 | void strbuf_vinsertf(struct strbuf *sb, size_t pos, const char *fmt, | |
252 | va_list ap); | |
253 | ||
254 | void strbuf_insertf(struct strbuf *sb, size_t pos, const char *fmt, ...); | |
255 | ||
256 | /** | |
257 | * Remove given amount of data from a given position of the buffer. | |
258 | */ | |
259 | void strbuf_remove(struct strbuf *sb, size_t pos, size_t len); | |
260 | ||
261 | /** | |
262 | * Remove the bytes between `pos..pos+len` and replace it with the given | |
263 | * data. | |
264 | */ | |
265 | void strbuf_splice(struct strbuf *sb, size_t pos, size_t len, | |
266 | const void *data, size_t data_len); | |
267 | ||
268 | /** | |
269 | * Add a NUL-terminated string to the buffer. Each line will be prepended | |
270 | * by a comment character and a blank. | |
271 | */ | |
272 | void strbuf_add_commented_lines(struct strbuf *out, | |
273 | const char *buf, size_t size); | |
274 | ||
275 | ||
276 | /** | |
277 | * Add data of given length to the buffer. | |
278 | */ | |
279 | void strbuf_add(struct strbuf *sb, const void *data, size_t len); | |
280 | ||
281 | /** | |
282 | * Add a NUL-terminated string to the buffer. | |
283 | * | |
284 | * NOTE: This function will *always* be implemented as an inline or a macro | |
285 | * using strlen, meaning that this is efficient to write things like: | |
286 | * | |
287 | * strbuf_addstr(sb, "immediate string"); | |
288 | * | |
289 | */ | |
290 | static inline void strbuf_addstr(struct strbuf *sb, const char *s) | |
291 | { | |
292 | strbuf_add(sb, s, strlen(s)); | |
293 | } | |
294 | ||
295 | /** | |
296 | * Copy the contents of another buffer at the end of the current one. | |
297 | */ | |
298 | void strbuf_addbuf(struct strbuf *sb, const struct strbuf *sb2); | |
299 | ||
300 | /** | |
301 | * Join the arguments into a buffer. `delim` is put between every | |
302 | * two arguments. | |
303 | */ | |
304 | const char *strbuf_join_argv(struct strbuf *buf, int argc, | |
305 | const char **argv, char delim); | |
306 | ||
307 | /** | |
308 | * This function can be used to expand a format string containing | |
309 | * placeholders. To that end, it parses the string and calls the specified | |
310 | * function for every percent sign found. | |
311 | * | |
312 | * The callback function is given a pointer to the character after the `%` | |
313 | * and a pointer to the struct strbuf. It is expected to add the expanded | |
314 | * version of the placeholder to the strbuf, e.g. to add a newline | |
315 | * character if the letter `n` appears after a `%`. The function returns | |
316 | * the length of the placeholder recognized and `strbuf_expand()` skips | |
317 | * over it. | |
318 | * | |
319 | * The format `%%` is automatically expanded to a single `%` as a quoting | |
320 | * mechanism; callers do not need to handle the `%` placeholder themselves, | |
321 | * and the callback function will not be invoked for this placeholder. | |
322 | * | |
323 | * All other characters (non-percent and not skipped ones) are copied | |
324 | * verbatim to the strbuf. If the callback returned zero, meaning that the | |
325 | * placeholder is unknown, then the percent sign is copied, too. | |
326 | * | |
327 | * In order to facilitate caching and to make it possible to give | |
328 | * parameters to the callback, `strbuf_expand()` passes a context pointer, | |
329 | * which can be used by the programmer of the callback as she sees fit. | |
330 | */ | |
331 | typedef size_t (*expand_fn_t) (struct strbuf *sb, | |
332 | const char *placeholder, | |
333 | void *context); | |
334 | void strbuf_expand(struct strbuf *sb, | |
335 | const char *format, | |
336 | expand_fn_t fn, | |
337 | void *context); | |
338 | ||
339 | /** | |
340 | * Used as callback for `strbuf_expand` to only expand literals | |
341 | * (i.e. %n and %xNN). The context argument is ignored. | |
342 | */ | |
343 | size_t strbuf_expand_literal_cb(struct strbuf *sb, | |
344 | const char *placeholder, | |
345 | void *context); | |
346 | ||
347 | /** | |
348 | * Used as callback for `strbuf_expand()`, expects an array of | |
349 | * struct strbuf_expand_dict_entry as context, i.e. pairs of | |
350 | * placeholder and replacement string. The array needs to be | |
351 | * terminated by an entry with placeholder set to NULL. | |
352 | */ | |
353 | struct strbuf_expand_dict_entry { | |
354 | const char *placeholder; | |
355 | const char *value; | |
356 | }; | |
357 | size_t strbuf_expand_dict_cb(struct strbuf *sb, | |
358 | const char *placeholder, | |
359 | void *context); | |
360 | ||
361 | /** | |
362 | * Append the contents of one strbuf to another, quoting any | |
363 | * percent signs ("%") into double-percents ("%%") in the | |
364 | * destination. This is useful for literal data to be fed to either | |
365 | * strbuf_expand or to the *printf family of functions. | |
366 | */ | |
367 | void strbuf_addbuf_percentquote(struct strbuf *dst, const struct strbuf *src); | |
368 | ||
369 | /** | |
370 | * Append the given byte size as a human-readable string (i.e. 12.23 KiB, | |
371 | * 3.50 MiB). | |
372 | */ | |
373 | void strbuf_humanise_bytes(struct strbuf *buf, off_t bytes); | |
374 | ||
375 | /** | |
376 | * Append the given byte rate as a human-readable string (i.e. 12.23 KiB/s, | |
377 | * 3.50 MiB/s). | |
378 | */ | |
379 | void strbuf_humanise_rate(struct strbuf *buf, off_t bytes); | |
380 | ||
381 | /** | |
382 | * Add a formatted string to the buffer. | |
383 | */ | |
384 | __attribute__((format (printf,2,3))) | |
385 | void strbuf_addf(struct strbuf *sb, const char *fmt, ...); | |
386 | ||
387 | /** | |
388 | * Add a formatted string prepended by a comment character and a | |
389 | * blank to the buffer. | |
390 | */ | |
391 | __attribute__((format (printf, 2, 3))) | |
392 | void strbuf_commented_addf(struct strbuf *sb, const char *fmt, ...); | |
393 | ||
394 | __attribute__((format (printf,2,0))) | |
395 | void strbuf_vaddf(struct strbuf *sb, const char *fmt, va_list ap); | |
396 | ||
397 | /** | |
398 | * Add the time specified by `tm`, as formatted by `strftime`. | |
399 | * `tz_offset` is in decimal hhmm format, e.g. -600 means six hours west | |
400 | * of Greenwich, and it's used to expand %z internally. However, tokens | |
401 | * with modifiers (e.g. %Ez) are passed to `strftime`. | |
402 | * `suppress_tz_name`, when set, expands %Z internally to the empty | |
403 | * string rather than passing it to `strftime`. | |
404 | */ | |
405 | void strbuf_addftime(struct strbuf *sb, const char *fmt, | |
406 | const struct tm *tm, int tz_offset, | |
407 | int suppress_tz_name); | |
408 | ||
409 | /** | |
410 | * Read a given size of data from a FILE* pointer to the buffer. | |
411 | * | |
412 | * NOTE: The buffer is rewound if the read fails. If -1 is returned, | |
413 | * `errno` must be consulted, like you would do for `read(3)`. | |
414 | * `strbuf_read()`, `strbuf_read_file()` and `strbuf_getline_*()` | |
415 | * family of functions have the same behaviour as well. | |
416 | */ | |
417 | size_t strbuf_fread(struct strbuf *sb, size_t size, FILE *file); | |
418 | ||
419 | /** | |
420 | * Read the contents of a given file descriptor. The third argument can be | |
421 | * used to give a hint about the file size, to avoid reallocs. If read fails, | |
422 | * any partial read is undone. | |
423 | */ | |
424 | ssize_t strbuf_read(struct strbuf *sb, int fd, size_t hint); | |
425 | ||
426 | /** | |
427 | * Read the contents of a given file descriptor partially by using only one | |
428 | * attempt of xread. The third argument can be used to give a hint about the | |
429 | * file size, to avoid reallocs. Returns the number of new bytes appended to | |
430 | * the sb. | |
431 | */ | |
432 | ssize_t strbuf_read_once(struct strbuf *sb, int fd, size_t hint); | |
433 | ||
434 | /** | |
435 | * Read the contents of a file, specified by its path. The third argument | |
436 | * can be used to give a hint about the file size, to avoid reallocs. | |
437 | * Return the number of bytes read or a negative value if some error | |
438 | * occurred while opening or reading the file. | |
439 | */ | |
440 | ssize_t strbuf_read_file(struct strbuf *sb, const char *path, size_t hint); | |
441 | ||
442 | /** | |
443 | * Read the target of a symbolic link, specified by its path. The third | |
444 | * argument can be used to give a hint about the size, to avoid reallocs. | |
445 | */ | |
446 | int strbuf_readlink(struct strbuf *sb, const char *path, size_t hint); | |
447 | ||
448 | /** | |
449 | * Write the whole content of the strbuf to the stream not stopping at | |
450 | * NUL bytes. | |
451 | */ | |
452 | ssize_t strbuf_write(struct strbuf *sb, FILE *stream); | |
453 | ||
454 | /** | |
455 | * Read a line from a FILE *, overwriting the existing contents of | |
456 | * the strbuf. The strbuf_getline*() family of functions share | |
457 | * this signature, but have different line termination conventions. | |
458 | * | |
459 | * Reading stops after the terminator or at EOF. The terminator | |
460 | * is removed from the buffer before returning. Returns 0 unless | |
461 | * there was nothing left before EOF, in which case it returns `EOF`. | |
462 | */ | |
463 | typedef int (*strbuf_getline_fn)(struct strbuf *, FILE *); | |
464 | ||
465 | /* Uses LF as the line terminator */ | |
466 | int strbuf_getline_lf(struct strbuf *sb, FILE *fp); | |
467 | ||
468 | /* Uses NUL as the line terminator */ | |
469 | int strbuf_getline_nul(struct strbuf *sb, FILE *fp); | |
470 | ||
471 | /* | |
472 | * Similar to strbuf_getline_lf(), but additionally treats a CR that | |
473 | * comes immediately before the LF as part of the terminator. | |
474 | * This is the most friendly version to be used to read "text" files | |
475 | * that can come from platforms whose native text format is CRLF | |
476 | * terminated. | |
477 | */ | |
478 | int strbuf_getline(struct strbuf *sb, FILE *file); | |
479 | ||
480 | ||
481 | /** | |
482 | * Like `strbuf_getline`, but keeps the trailing terminator (if | |
483 | * any) in the buffer. | |
484 | */ | |
485 | int strbuf_getwholeline(struct strbuf *sb, FILE *file, int term); | |
486 | ||
487 | /** | |
488 | * Like `strbuf_getwholeline`, but operates on a file descriptor. | |
489 | * It reads one character at a time, so it is very slow. Do not | |
490 | * use it unless you need the correct position in the file | |
491 | * descriptor. | |
492 | */ | |
493 | int strbuf_getwholeline_fd(struct strbuf *sb, int fd, int term); | |
494 | ||
495 | /** | |
496 | * Set the buffer to the path of the current working directory. | |
497 | */ | |
498 | int strbuf_getcwd(struct strbuf *sb); | |
499 | ||
500 | /** | |
501 | * Add a path to a buffer, converting a relative path to an | |
502 | * absolute one in the process. Symbolic links are not | |
503 | * resolved. | |
504 | */ | |
505 | void strbuf_add_absolute_path(struct strbuf *sb, const char *path); | |
506 | ||
507 | /** | |
508 | * Canonize `path` (make it absolute, resolve symlinks, remove extra | |
509 | * slashes) and append it to `sb`. Die with an informative error | |
510 | * message if there is a problem. | |
511 | * | |
512 | * The directory part of `path` (i.e., everything up to the last | |
513 | * dir_sep) must denote a valid, existing directory, but the last | |
514 | * component need not exist. | |
515 | * | |
516 | * Callers that don't mind links should use the more lightweight | |
517 | * strbuf_add_absolute_path() instead. | |
518 | */ | |
519 | void strbuf_add_real_path(struct strbuf *sb, const char *path); | |
520 | ||
521 | ||
522 | /** | |
523 | * Normalize in-place the path contained in the strbuf. See | |
524 | * normalize_path_copy() for details. If an error occurs, the contents of "sb" | |
525 | * are left untouched, and -1 is returned. | |
526 | */ | |
527 | int strbuf_normalize_path(struct strbuf *sb); | |
528 | ||
529 | /** | |
530 | * Strip whitespace from a buffer. The second parameter controls if | |
531 | * comments are considered contents to be removed or not. | |
532 | */ | |
533 | void strbuf_stripspace(struct strbuf *buf, int skip_comments); | |
534 | ||
535 | static inline int strbuf_strip_suffix(struct strbuf *sb, const char *suffix) | |
536 | { | |
537 | if (strip_suffix_mem(sb->buf, &sb->len, suffix)) { | |
538 | strbuf_setlen(sb, sb->len); | |
539 | return 1; | |
540 | } else | |
541 | return 0; | |
542 | } | |
543 | ||
544 | /** | |
545 | * Split str (of length slen) at the specified terminator character. | |
546 | * Return a null-terminated array of pointers to strbuf objects | |
547 | * holding the substrings. The substrings include the terminator, | |
548 | * except for the last substring, which might be unterminated if the | |
549 | * original string did not end with a terminator. If max is positive, | |
550 | * then split the string into at most max substrings (with the last | |
551 | * substring containing everything following the (max-1)th terminator | |
552 | * character). | |
553 | * | |
554 | * The most generic form is `strbuf_split_buf`, which takes an arbitrary | |
555 | * pointer/len buffer. The `_str` variant takes a NUL-terminated string, | |
556 | * the `_max` variant takes a strbuf, and just `strbuf_split` is a convenience | |
557 | * wrapper to drop the `max` parameter. | |
558 | * | |
559 | * For lighter-weight alternatives, see string_list_split() and | |
560 | * string_list_split_in_place(). | |
561 | */ | |
562 | struct strbuf **strbuf_split_buf(const char *str, size_t len, | |
563 | int terminator, int max); | |
564 | ||
565 | static inline struct strbuf **strbuf_split_str(const char *str, | |
566 | int terminator, int max) | |
567 | { | |
568 | return strbuf_split_buf(str, strlen(str), terminator, max); | |
569 | } | |
570 | ||
571 | static inline struct strbuf **strbuf_split_max(const struct strbuf *sb, | |
572 | int terminator, int max) | |
573 | { | |
574 | return strbuf_split_buf(sb->buf, sb->len, terminator, max); | |
575 | } | |
576 | ||
577 | static inline struct strbuf **strbuf_split(const struct strbuf *sb, | |
578 | int terminator) | |
579 | { | |
580 | return strbuf_split_max(sb, terminator, 0); | |
581 | } | |
582 | ||
583 | /* | |
584 | * Adds all strings of a string list to the strbuf, separated by the given | |
585 | * separator. For example, if sep is | |
586 | * ', ' | |
587 | * and slist contains | |
588 | * ['element1', 'element2', ..., 'elementN'], | |
589 | * then write: | |
590 | * 'element1, element2, ..., elementN' | |
591 | * to str. If only one element, just write "element1" to str. | |
592 | */ | |
593 | void strbuf_add_separated_string_list(struct strbuf *str, | |
594 | const char *sep, | |
595 | struct string_list *slist); | |
596 | ||
597 | /** | |
598 | * Free a NULL-terminated list of strbufs (for example, the return | |
599 | * values of the strbuf_split*() functions). | |
600 | */ | |
601 | void strbuf_list_free(struct strbuf **list); | |
602 | ||
603 | /** | |
604 | * Add the abbreviation, as generated by find_unique_abbrev, of `sha1` to | |
605 | * the strbuf `sb`. | |
606 | */ | |
607 | void strbuf_add_unique_abbrev(struct strbuf *sb, | |
608 | const struct object_id *oid, | |
609 | int abbrev_len); | |
610 | ||
611 | /** | |
612 | * Launch the user preferred editor to edit a file and fill the buffer | |
613 | * with the file's contents upon the user completing their editing. The | |
614 | * third argument can be used to set the environment which the editor is | |
615 | * run in. If the buffer is NULL the editor is launched as usual but the | |
616 | * file's contents are not read into the buffer upon completion. | |
617 | */ | |
618 | int launch_editor(const char *path, struct strbuf *buffer, | |
619 | const char *const *env); | |
620 | ||
621 | int launch_sequence_editor(const char *path, struct strbuf *buffer, | |
622 | const char *const *env); | |
623 | ||
624 | void strbuf_add_lines(struct strbuf *sb, | |
625 | const char *prefix, | |
626 | const char *buf, | |
627 | size_t size); | |
628 | ||
629 | /** | |
630 | * Append s to sb, with the characters '<', '>', '&' and '"' converted | |
631 | * into XML entities. | |
632 | */ | |
633 | void strbuf_addstr_xml_quoted(struct strbuf *sb, | |
634 | const char *s); | |
635 | ||
636 | /** | |
637 | * "Complete" the contents of `sb` by ensuring that either it ends with the | |
638 | * character `term`, or it is empty. This can be used, for example, | |
639 | * to ensure that text ends with a newline, but without creating an empty | |
640 | * blank line if there is no content in the first place. | |
641 | */ | |
642 | static inline void strbuf_complete(struct strbuf *sb, char term) | |
643 | { | |
644 | if (sb->len && sb->buf[sb->len - 1] != term) | |
645 | strbuf_addch(sb, term); | |
646 | } | |
647 | ||
648 | static inline void strbuf_complete_line(struct strbuf *sb) | |
649 | { | |
650 | strbuf_complete(sb, '\n'); | |
651 | } | |
652 | ||
653 | /* | |
654 | * Copy "name" to "sb", expanding any special @-marks as handled by | |
655 | * interpret_branch_name(). The result is a non-qualified branch name | |
656 | * (so "foo" or "origin/master" instead of "refs/heads/foo" or | |
657 | * "refs/remotes/origin/master"). | |
658 | * | |
659 | * Note that the resulting name may not be a syntactically valid refname. | |
660 | * | |
661 | * If "allowed" is non-zero, restrict the set of allowed expansions. See | |
662 | * interpret_branch_name() for details. | |
663 | */ | |
664 | void strbuf_branchname(struct strbuf *sb, const char *name, | |
665 | unsigned allowed); | |
666 | ||
667 | /* | |
668 | * Like strbuf_branchname() above, but confirm that the result is | |
669 | * syntactically valid to be used as a local branch name in refs/heads/. | |
670 | * | |
671 | * The return value is "0" if the result is valid, and "-1" otherwise. | |
672 | */ | |
673 | int strbuf_check_branch_ref(struct strbuf *sb, const char *name); | |
674 | ||
675 | typedef int (*char_predicate)(char ch); | |
676 | ||
677 | int is_rfc3986_unreserved(char ch); | |
678 | int is_rfc3986_reserved_or_unreserved(char ch); | |
679 | ||
680 | void strbuf_addstr_urlencode(struct strbuf *sb, const char *name, | |
681 | char_predicate allow_unencoded_fn); | |
682 | ||
683 | __attribute__((format (printf,1,2))) | |
684 | int printf_ln(const char *fmt, ...); | |
685 | __attribute__((format (printf,2,3))) | |
686 | int fprintf_ln(FILE *fp, const char *fmt, ...); | |
687 | ||
688 | char *xstrdup_tolower(const char *); | |
689 | char *xstrdup_toupper(const char *); | |
690 | ||
691 | /** | |
692 | * Create a newly allocated string using printf format. You can do this easily | |
693 | * with a strbuf, but this provides a shortcut to save a few lines. | |
694 | */ | |
695 | __attribute__((format (printf, 1, 0))) | |
696 | char *xstrvfmt(const char *fmt, va_list ap); | |
697 | __attribute__((format (printf, 1, 2))) | |
698 | char *xstrfmt(const char *fmt, ...); | |
699 | ||
700 | #endif /* STRBUF_H */ |