strbuf.hon commit wt-status.c: set the committable flag in the collect phase (f3bd35f)
   1#ifndef STRBUF_H
   2#define STRBUF_H
   3
   4struct 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 */
  66struct strbuf {
  67        size_t alloc;
  68        size_t len;
  69        char *buf;
  70};
  71
  72extern 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 */
  79struct 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 */
  90extern void strbuf_init(struct strbuf *, size_t);
  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 */
 100extern void strbuf_release(struct strbuf *);
 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 */
 110extern char *strbuf_detach(struct strbuf *, size_t *);
 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 */
 120extern void strbuf_attach(struct strbuf *, void *, size_t, size_t);
 121
 122/**
 123 * Swap the contents of two string buffers.
 124 */
 125static 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 */
 139static 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 */
 151extern void strbuf_grow(struct strbuf *, size_t);
 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 */
 160static 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 */
 186extern void strbuf_trim(struct strbuf *);
 187extern void strbuf_rtrim(struct strbuf *);
 188extern void strbuf_ltrim(struct strbuf *);
 189
 190/* Strip trailing directory separators */
 191extern void strbuf_trim_trailing_dir_sep(struct strbuf *);
 192
 193/**
 194 * Replace the contents of the strbuf with a reencoded form.  Returns -1
 195 * on error, 0 on success.
 196 */
 197extern int strbuf_reencode(struct strbuf *sb, const char *from, const char *to);
 198
 199/**
 200 * Lowercase each character in the buffer using `tolower`.
 201 */
 202extern void strbuf_tolower(struct strbuf *sb);
 203
 204/**
 205 * Compare two buffers. Returns an integer less than, equal to, or greater
 206 * than zero if the first buffer is found, respectively, to be less than,
 207 * to match, or be greater than the second buffer.
 208 */
 209extern int strbuf_cmp(const struct strbuf *, const struct strbuf *);
 210
 211
 212/**
 213 * Adding data to the buffer
 214 * -------------------------
 215 *
 216 * NOTE: All of the functions in this section will grow the buffer as
 217 * necessary.  If they fail for some reason other than memory shortage and the
 218 * buffer hadn't been allocated before (i.e. the `struct strbuf` was set to
 219 * `STRBUF_INIT`), then they will free() it.
 220 */
 221
 222/**
 223 * Add a single character to the buffer.
 224 */
 225static inline void strbuf_addch(struct strbuf *sb, int c)
 226{
 227        if (!strbuf_avail(sb))
 228                strbuf_grow(sb, 1);
 229        sb->buf[sb->len++] = c;
 230        sb->buf[sb->len] = '\0';
 231}
 232
 233/**
 234 * Add a character the specified number of times to the buffer.
 235 */
 236extern void strbuf_addchars(struct strbuf *sb, int c, size_t n);
 237
 238/**
 239 * Insert data to the given position of the buffer. The remaining contents
 240 * will be shifted, not overwritten.
 241 */
 242extern void strbuf_insert(struct strbuf *, size_t pos, const void *, size_t);
 243
 244/**
 245 * Remove given amount of data from a given position of the buffer.
 246 */
 247extern void strbuf_remove(struct strbuf *, size_t pos, size_t len);
 248
 249/**
 250 * Remove the bytes between `pos..pos+len` and replace it with the given
 251 * data.
 252 */
 253extern void strbuf_splice(struct strbuf *, size_t pos, size_t len,
 254                          const void *, size_t);
 255
 256/**
 257 * Add a NUL-terminated string to the buffer. Each line will be prepended
 258 * by a comment character and a blank.
 259 */
 260extern void strbuf_add_commented_lines(struct strbuf *out, const char *buf, size_t size);
 261
 262
 263/**
 264 * Add data of given length to the buffer.
 265 */
 266extern void strbuf_add(struct strbuf *, const void *, size_t);
 267
 268/**
 269 * Add a NUL-terminated string to the buffer.
 270 *
 271 * NOTE: This function will *always* be implemented as an inline or a macro
 272 * using strlen, meaning that this is efficient to write things like:
 273 *
 274 *     strbuf_addstr(sb, "immediate string");
 275 *
 276 */
 277static inline void strbuf_addstr(struct strbuf *sb, const char *s)
 278{
 279        strbuf_add(sb, s, strlen(s));
 280}
 281
 282/**
 283 * Copy the contents of another buffer at the end of the current one.
 284 */
 285extern void strbuf_addbuf(struct strbuf *sb, const struct strbuf *sb2);
 286
 287/**
 288 * This function can be used to expand a format string containing
 289 * placeholders. To that end, it parses the string and calls the specified
 290 * function for every percent sign found.
 291 *
 292 * The callback function is given a pointer to the character after the `%`
 293 * and a pointer to the struct strbuf.  It is expected to add the expanded
 294 * version of the placeholder to the strbuf, e.g. to add a newline
 295 * character if the letter `n` appears after a `%`.  The function returns
 296 * the length of the placeholder recognized and `strbuf_expand()` skips
 297 * over it.
 298 *
 299 * The format `%%` is automatically expanded to a single `%` as a quoting
 300 * mechanism; callers do not need to handle the `%` placeholder themselves,
 301 * and the callback function will not be invoked for this placeholder.
 302 *
 303 * All other characters (non-percent and not skipped ones) are copied
 304 * verbatim to the strbuf.  If the callback returned zero, meaning that the
 305 * placeholder is unknown, then the percent sign is copied, too.
 306 *
 307 * In order to facilitate caching and to make it possible to give
 308 * parameters to the callback, `strbuf_expand()` passes a context pointer,
 309 * which can be used by the programmer of the callback as she sees fit.
 310 */
 311typedef size_t (*expand_fn_t) (struct strbuf *sb, const char *placeholder, void *context);
 312extern void strbuf_expand(struct strbuf *sb, const char *format, expand_fn_t fn, void *context);
 313
 314/**
 315 * Used as callback for `strbuf_expand()`, expects an array of
 316 * struct strbuf_expand_dict_entry as context, i.e. pairs of
 317 * placeholder and replacement string.  The array needs to be
 318 * terminated by an entry with placeholder set to NULL.
 319 */
 320struct strbuf_expand_dict_entry {
 321        const char *placeholder;
 322        const char *value;
 323};
 324extern size_t strbuf_expand_dict_cb(struct strbuf *sb, const char *placeholder, void *context);
 325
 326/**
 327 * Append the contents of one strbuf to another, quoting any
 328 * percent signs ("%") into double-percents ("%%") in the
 329 * destination. This is useful for literal data to be fed to either
 330 * strbuf_expand or to the *printf family of functions.
 331 */
 332extern void strbuf_addbuf_percentquote(struct strbuf *dst, const struct strbuf *src);
 333
 334/**
 335 * Append the given byte size as a human-readable string (i.e. 12.23 KiB,
 336 * 3.50 MiB).
 337 */
 338extern void strbuf_humanise_bytes(struct strbuf *buf, off_t bytes);
 339
 340/**
 341 * Add a formatted string to the buffer.
 342 */
 343__attribute__((format (printf,2,3)))
 344extern void strbuf_addf(struct strbuf *sb, const char *fmt, ...);
 345
 346/**
 347 * Add a formatted string prepended by a comment character and a
 348 * blank to the buffer.
 349 */
 350__attribute__((format (printf, 2, 3)))
 351extern void strbuf_commented_addf(struct strbuf *sb, const char *fmt, ...);
 352
 353__attribute__((format (printf,2,0)))
 354extern void strbuf_vaddf(struct strbuf *sb, const char *fmt, va_list ap);
 355
 356/**
 357 * Add the time specified by `tm`, as formatted by `strftime`.
 358 * `tz_offset` is in decimal hhmm format, e.g. -600 means six hours west
 359 * of Greenwich, and it's used to expand %z internally.  However, tokens
 360 * with modifiers (e.g. %Ez) are passed to `strftime`.
 361 * `suppress_tz_name`, when set, expands %Z internally to the empty
 362 * string rather than passing it to `strftime`.
 363 */
 364extern void strbuf_addftime(struct strbuf *sb, const char *fmt,
 365                            const struct tm *tm, int tz_offset,
 366                            int suppress_tz_name);
 367
 368/**
 369 * Read a given size of data from a FILE* pointer to the buffer.
 370 *
 371 * NOTE: The buffer is rewound if the read fails. If -1 is returned,
 372 * `errno` must be consulted, like you would do for `read(3)`.
 373 * `strbuf_read()`, `strbuf_read_file()` and `strbuf_getline_*()`
 374 * family of functions have the same behaviour as well.
 375 */
 376extern size_t strbuf_fread(struct strbuf *, size_t, FILE *);
 377
 378/**
 379 * Read the contents of a given file descriptor. The third argument can be
 380 * used to give a hint about the file size, to avoid reallocs.  If read fails,
 381 * any partial read is undone.
 382 */
 383extern ssize_t strbuf_read(struct strbuf *, int fd, size_t hint);
 384
 385/**
 386 * Read the contents of a given file descriptor partially by using only one
 387 * attempt of xread. The third argument can be used to give a hint about the
 388 * file size, to avoid reallocs. Returns the number of new bytes appended to
 389 * the sb.
 390 */
 391extern ssize_t strbuf_read_once(struct strbuf *, int fd, size_t hint);
 392
 393/**
 394 * Read the contents of a file, specified by its path. The third argument
 395 * can be used to give a hint about the file size, to avoid reallocs.
 396 * Return the number of bytes read or a negative value if some error
 397 * occurred while opening or reading the file.
 398 */
 399extern ssize_t strbuf_read_file(struct strbuf *sb, const char *path, size_t hint);
 400
 401/**
 402 * Read the target of a symbolic link, specified by its path.  The third
 403 * argument can be used to give a hint about the size, to avoid reallocs.
 404 */
 405extern int strbuf_readlink(struct strbuf *sb, const char *path, size_t hint);
 406
 407/**
 408 * Write the whole content of the strbuf to the stream not stopping at
 409 * NUL bytes.
 410 */
 411extern ssize_t strbuf_write(struct strbuf *sb, FILE *stream);
 412
 413/**
 414 * Read a line from a FILE *, overwriting the existing contents of
 415 * the strbuf.  The strbuf_getline*() family of functions share
 416 * this signature, but have different line termination conventions.
 417 *
 418 * Reading stops after the terminator or at EOF.  The terminator
 419 * is removed from the buffer before returning.  Returns 0 unless
 420 * there was nothing left before EOF, in which case it returns `EOF`.
 421 */
 422typedef int (*strbuf_getline_fn)(struct strbuf *, FILE *);
 423
 424/* Uses LF as the line terminator */
 425extern int strbuf_getline_lf(struct strbuf *sb, FILE *fp);
 426
 427/* Uses NUL as the line terminator */
 428extern int strbuf_getline_nul(struct strbuf *sb, FILE *fp);
 429
 430/*
 431 * Similar to strbuf_getline_lf(), but additionally treats a CR that
 432 * comes immediately before the LF as part of the terminator.
 433 * This is the most friendly version to be used to read "text" files
 434 * that can come from platforms whose native text format is CRLF
 435 * terminated.
 436 */
 437extern int strbuf_getline(struct strbuf *, FILE *);
 438
 439
 440/**
 441 * Like `strbuf_getline`, but keeps the trailing terminator (if
 442 * any) in the buffer.
 443 */
 444extern int strbuf_getwholeline(struct strbuf *, FILE *, int);
 445
 446/**
 447 * Like `strbuf_getwholeline`, but operates on a file descriptor.
 448 * It reads one character at a time, so it is very slow.  Do not
 449 * use it unless you need the correct position in the file
 450 * descriptor.
 451 */
 452extern int strbuf_getwholeline_fd(struct strbuf *, int, int);
 453
 454/**
 455 * Set the buffer to the path of the current working directory.
 456 */
 457extern int strbuf_getcwd(struct strbuf *sb);
 458
 459/**
 460 * Add a path to a buffer, converting a relative path to an
 461 * absolute one in the process.  Symbolic links are not
 462 * resolved.
 463 */
 464extern void strbuf_add_absolute_path(struct strbuf *sb, const char *path);
 465
 466/**
 467 * Canonize `path` (make it absolute, resolve symlinks, remove extra
 468 * slashes) and append it to `sb`.  Die with an informative error
 469 * message if there is a problem.
 470 *
 471 * The directory part of `path` (i.e., everything up to the last
 472 * dir_sep) must denote a valid, existing directory, but the last
 473 * component need not exist.
 474 *
 475 * Callers that don't mind links should use the more lightweight
 476 * strbuf_add_absolute_path() instead.
 477 */
 478extern void strbuf_add_real_path(struct strbuf *sb, const char *path);
 479
 480
 481/**
 482 * Normalize in-place the path contained in the strbuf. See
 483 * normalize_path_copy() for details. If an error occurs, the contents of "sb"
 484 * are left untouched, and -1 is returned.
 485 */
 486extern int strbuf_normalize_path(struct strbuf *sb);
 487
 488/**
 489 * Strip whitespace from a buffer. The second parameter controls if
 490 * comments are considered contents to be removed or not.
 491 */
 492extern void strbuf_stripspace(struct strbuf *buf, int skip_comments);
 493
 494static inline int strbuf_strip_suffix(struct strbuf *sb, const char *suffix)
 495{
 496        if (strip_suffix_mem(sb->buf, &sb->len, suffix)) {
 497                strbuf_setlen(sb, sb->len);
 498                return 1;
 499        } else
 500                return 0;
 501}
 502
 503/**
 504 * Split str (of length slen) at the specified terminator character.
 505 * Return a null-terminated array of pointers to strbuf objects
 506 * holding the substrings.  The substrings include the terminator,
 507 * except for the last substring, which might be unterminated if the
 508 * original string did not end with a terminator.  If max is positive,
 509 * then split the string into at most max substrings (with the last
 510 * substring containing everything following the (max-1)th terminator
 511 * character).
 512 *
 513 * The most generic form is `strbuf_split_buf`, which takes an arbitrary
 514 * pointer/len buffer. The `_str` variant takes a NUL-terminated string,
 515 * the `_max` variant takes a strbuf, and just `strbuf_split` is a convenience
 516 * wrapper to drop the `max` parameter.
 517 *
 518 * For lighter-weight alternatives, see string_list_split() and
 519 * string_list_split_in_place().
 520 */
 521extern struct strbuf **strbuf_split_buf(const char *, size_t,
 522                                        int terminator, int max);
 523
 524static inline struct strbuf **strbuf_split_str(const char *str,
 525                                               int terminator, int max)
 526{
 527        return strbuf_split_buf(str, strlen(str), terminator, max);
 528}
 529
 530static inline struct strbuf **strbuf_split_max(const struct strbuf *sb,
 531                                                int terminator, int max)
 532{
 533        return strbuf_split_buf(sb->buf, sb->len, terminator, max);
 534}
 535
 536static inline struct strbuf **strbuf_split(const struct strbuf *sb,
 537                                           int terminator)
 538{
 539        return strbuf_split_max(sb, terminator, 0);
 540}
 541
 542/*
 543 * Adds all strings of a string list to the strbuf, separated by the given
 544 * separator.  For example, if sep is
 545 *   ', '
 546 * and slist contains
 547 *   ['element1', 'element2', ..., 'elementN'],
 548 * then write:
 549 *   'element1, element2, ..., elementN'
 550 * to str.  If only one element, just write "element1" to str.
 551 */
 552extern void strbuf_add_separated_string_list(struct strbuf *str,
 553                                             const char *sep,
 554                                             struct string_list *slist);
 555
 556/**
 557 * Free a NULL-terminated list of strbufs (for example, the return
 558 * values of the strbuf_split*() functions).
 559 */
 560extern void strbuf_list_free(struct strbuf **);
 561
 562/**
 563 * Add the abbreviation, as generated by find_unique_abbrev, of `sha1` to
 564 * the strbuf `sb`.
 565 */
 566extern void strbuf_add_unique_abbrev(struct strbuf *sb,
 567                                     const struct object_id *oid,
 568                                     int abbrev_len);
 569
 570/**
 571 * Launch the user preferred editor to edit a file and fill the buffer
 572 * with the file's contents upon the user completing their editing. The
 573 * third argument can be used to set the environment which the editor is
 574 * run in. If the buffer is NULL the editor is launched as usual but the
 575 * file's contents are not read into the buffer upon completion.
 576 */
 577extern int launch_editor(const char *path, struct strbuf *buffer, const char *const *env);
 578
 579extern void strbuf_add_lines(struct strbuf *sb, const char *prefix, const char *buf, size_t size);
 580
 581/**
 582 * Append s to sb, with the characters '<', '>', '&' and '"' converted
 583 * into XML entities.
 584 */
 585extern void strbuf_addstr_xml_quoted(struct strbuf *sb, const char *s);
 586
 587/**
 588 * "Complete" the contents of `sb` by ensuring that either it ends with the
 589 * character `term`, or it is empty.  This can be used, for example,
 590 * to ensure that text ends with a newline, but without creating an empty
 591 * blank line if there is no content in the first place.
 592 */
 593static inline void strbuf_complete(struct strbuf *sb, char term)
 594{
 595        if (sb->len && sb->buf[sb->len - 1] != term)
 596                strbuf_addch(sb, term);
 597}
 598
 599static inline void strbuf_complete_line(struct strbuf *sb)
 600{
 601        strbuf_complete(sb, '\n');
 602}
 603
 604/*
 605 * Copy "name" to "sb", expanding any special @-marks as handled by
 606 * interpret_branch_name(). The result is a non-qualified branch name
 607 * (so "foo" or "origin/master" instead of "refs/heads/foo" or
 608 * "refs/remotes/origin/master").
 609 *
 610 * Note that the resulting name may not be a syntactically valid refname.
 611 *
 612 * If "allowed" is non-zero, restrict the set of allowed expansions. See
 613 * interpret_branch_name() for details.
 614 */
 615extern void strbuf_branchname(struct strbuf *sb, const char *name,
 616                              unsigned allowed);
 617
 618/*
 619 * Like strbuf_branchname() above, but confirm that the result is
 620 * syntactically valid to be used as a local branch name in refs/heads/.
 621 *
 622 * The return value is "0" if the result is valid, and "-1" otherwise.
 623 */
 624extern int strbuf_check_branch_ref(struct strbuf *sb, const char *name);
 625
 626extern void strbuf_addstr_urlencode(struct strbuf *, const char *,
 627                                    int reserved);
 628
 629__attribute__((format (printf,1,2)))
 630extern int printf_ln(const char *fmt, ...);
 631__attribute__((format (printf,2,3)))
 632extern int fprintf_ln(FILE *fp, const char *fmt, ...);
 633
 634char *xstrdup_tolower(const char *);
 635char *xstrdup_toupper(const char *);
 636
 637/**
 638 * Create a newly allocated string using printf format. You can do this easily
 639 * with a strbuf, but this provides a shortcut to save a few lines.
 640 */
 641__attribute__((format (printf, 1, 0)))
 642char *xstrvfmt(const char *fmt, va_list ap);
 643__attribute__((format (printf, 1, 2)))
 644char *xstrfmt(const char *fmt, ...);
 645
 646#endif /* STRBUF_H */