2 * Copyright (C) 2004-2013 Andre Noll <maan@systemlinux.org>
4 * Licensed under the GPL v2. For licencing details see COPYING.
7 /** \file string.c Memory allocation and string handling functions. */
12 #include <sys/utsname.h> /* uname() */
26 * Paraslash's version of realloc().
28 * \param p Pointer to the memory block, may be \p NULL.
29 * \param size The desired new size.
31 * A wrapper for realloc(3). It calls \p exit(\p EXIT_FAILURE) on errors,
32 * i.e. there is no need to check the return value in the caller.
34 * \return A pointer to the newly allocated memory, which is suitably aligned
35 * for any kind of variable and may be different from \a p.
39 __must_check __malloc
void *para_realloc(void *p
, size_t size
)
42 * No need to check for NULL pointers: If p is NULL, the call
43 * to realloc is equivalent to malloc(size)
46 if (!(p
= realloc(p
, size
))) {
47 PARA_EMERG_LOG("realloc failed (size = %zu), aborting\n",
55 * Paraslash's version of malloc().
57 * \param size The desired new size.
59 * A wrapper for malloc(3) which exits on errors.
61 * \return A pointer to the allocated memory, which is suitably aligned for any
66 __must_check __malloc
void *para_malloc(size_t size
)
73 PARA_EMERG_LOG("malloc failed (size = %zu), aborting\n",
81 * Paraslash's version of calloc().
83 * \param size The desired new size.
85 * A wrapper for calloc(3) which exits on errors.
87 * \return A pointer to the allocated and zeroed-out memory, which is suitably
88 * aligned for any kind of variable.
92 __must_check __malloc
void *para_calloc(size_t size
)
94 void *ret
= para_malloc(size
);
101 * Paraslash's version of strdup().
103 * \param s The string to be duplicated.
105 * A wrapper for strdup(3). It calls \p exit(EXIT_FAILURE) on errors, i.e.
106 * there is no need to check the return value in the caller.
108 * \return A pointer to the duplicated string. If \a s was the \p NULL pointer,
109 * an pointer to an empty string is returned.
113 __must_check __malloc
char *para_strdup(const char *s
)
117 if ((ret
= strdup(s
? s
: "")))
119 PARA_EMERG_LOG("strdup failed, aborting\n");
124 * Print a formated message to a dynamically allocated string.
126 * \param result The formated string is returned here.
127 * \param fmt The format string.
128 * \param ap Initialized list of arguments.
130 * This function is similar to vasprintf(), a GNU extension which is not in C
131 * or POSIX. It allocates a string large enough to hold the output including
132 * the terminating null byte. The allocated string is returned via the first
133 * argument and must be freed by the caller. However, unlike vasprintf(), this
134 * function calls exit() if insufficient memory is available, while vasprintf()
135 * returns -1 in this case.
137 * \return Number of bytes written, not including the terminating \p NULL
140 * \sa printf(3), vsnprintf(3), va_start(3), vasprintf(3), \ref xasprintf().
142 __printf_2_0
unsigned xvasprintf(char **result
, const char *fmt
, va_list ap
)
148 *result
= para_malloc(size
+ 1);
150 ret
= vsnprintf(*result
, size
, fmt
, aq
);
153 if (ret
< size
) /* OK */
156 *result
= para_realloc(*result
, size
);
158 ret
= vsnprintf(*result
, size
, fmt
, aq
);
160 assert(ret
>= 0 && ret
< size
);
165 * Print to a dynamically allocated string, variable number of arguments.
167 * \param result See \ref xvasprintf().
168 * \param fmt Usual format string.
170 * \return The return value of the underlying call to \ref xvasprintf().
172 * \sa \ref xvasprintf() and the references mentioned there.
174 __printf_2_3
unsigned xasprintf(char **result
, const char *fmt
, ...)
180 ret
= xvasprintf(result
, fmt
, ap
);
186 * Allocate a sufficiently large string and print into it.
188 * \param fmt A usual format string.
190 * Produce output according to \p fmt. No artificial bound on the length of the
191 * resulting string is imposed.
193 * \return This function either returns a pointer to a string that must be
194 * freed by the caller or aborts without returning.
196 * \sa printf(3), xasprintf().
198 __must_check __printf_1_2 __malloc
char *make_message(const char *fmt
, ...)
204 xvasprintf(&msg
, fmt
, ap
);
210 * Free the content of a pointer and set it to \p NULL.
212 * This is equivalent to "free(*arg); *arg = NULL;".
214 * \param arg The pointer whose content should be freed.
216 void freep(void *arg
)
218 void **ptr
= (void **)arg
;
224 * Paraslash's version of strcat().
226 * \param a String to be appended to.
227 * \param b String to append.
229 * Append \p b to \p a.
231 * \return If \a a is \p NULL, return a pointer to a copy of \a b, i.e.
232 * para_strcat(NULL, b) is equivalent to para_strdup(b). If \a b is \p NULL,
233 * return \a a without making a copy of \a a. Otherwise, construct the
234 * concatenation \a c, free \a a (but not \a b) and return \a c.
238 __must_check __malloc
char *para_strcat(char *a
, const char *b
)
243 return para_strdup(b
);
246 tmp
= make_message("%s%s", a
, b
);
252 * Paraslash's version of dirname().
254 * \param name Pointer to the full path.
256 * Compute the directory component of \p name.
258 * \return If \a name is \p NULL or the empty string, return \p NULL.
259 * Otherwise, Make a copy of \a name and return its directory component. Caller
260 * is responsible to free the result.
262 __must_check __malloc
char *para_dirname(const char *name
)
268 ret
= para_strdup(name
);
269 p
= strrchr(ret
, '/');
278 * Paraslash's version of basename().
280 * \param name Pointer to the full path.
282 * Compute the filename component of \a name.
284 * \return \p NULL if (a) \a name is the empty string or \p NULL, or (b) name
285 * ends with a slash. Otherwise, a pointer within \a name is returned. Caller
286 * must not free the result.
288 __must_check
char *para_basename(const char *name
)
294 ret
= strrchr(name
, '/');
302 * Cut trailing newline.
304 * \param buf The string to be chopped.
306 * Replace the last character in \p buf by zero if it is equal to
307 * the newline character.
315 if (buf
[n
- 1] == '\n')
320 * Get the logname of the current user.
322 * \return A dynamically allocated string that must be freed by the caller. On
323 * errors, the string "unknown_user" is returned, i.e. this function never
328 __must_check __malloc
char *para_logname(void)
330 struct passwd
*pw
= getpwuid(getuid());
331 return para_strdup(pw
? pw
->pw_name
: "unknown_user");
335 * Get the home directory of the current user.
337 * \return A dynamically allocated string that must be freed by the caller. If
338 * the home directory could not be found, this function returns "/tmp".
340 __must_check __malloc
char *para_homedir(void)
342 struct passwd
*pw
= getpwuid(getuid());
343 return para_strdup(pw
? pw
->pw_dir
: "/tmp");
347 * Get the own hostname.
349 * \return A dynamically allocated string containing the hostname.
353 __malloc
char *para_hostname(void)
358 return para_strdup(u
.nodename
);
362 * Call a custom function for each complete line.
364 * \param flags Any combination of flags defined in \ref for_each_line_flags.
365 * \param buf The buffer containing data separated by newlines.
366 * \param size The number of bytes in \a buf.
367 * \param line_handler The custom function.
368 * \param private_data Pointer passed to \a line_handler.
370 * For each complete line in \p buf, \p line_handler is called. The first
371 * argument to \p line_handler is (a copy of) the current line, and \p
372 * private_data is passed as the second argument. If the \p FELF_READ_ONLY
373 * flag is unset, a pointer into \a buf is passed to the line handler,
374 * otherwise a pointer to a copy of the current line is passed instead. This
375 * copy is freed immediately after the line handler returns.
377 * The function returns if \p line_handler returns a negative value or no more
378 * lines are in the buffer. The rest of the buffer (last chunk containing an
379 * incomplete line) is moved to the beginning of the buffer if FELF_READ_ONLY is
382 * \return On success this function returns the number of bytes not handled to
383 * \p line_handler. The only possible error is a negative return value from the
384 * line handler. In this case processing stops and the return value of the line
385 * handler is returned to indicate failure.
387 * \sa \ref for_each_line_flags.
389 int for_each_line(unsigned flags
, char *buf
, size_t size
,
390 line_handler_t
*line_handler
, void *private_data
)
392 char *start
= buf
, *end
;
393 int ret
, i
, num_lines
= 0;
395 // PARA_NOTICE_LOG("buf: %s\n", buf);
396 while (start
< buf
+ size
) {
400 next_cr
= memchr(start
, '\n', buf
+ size
- start
);
401 next_null
= memchr(start
, '\0', buf
+ size
- start
);
402 if (!next_cr
&& !next_null
)
404 if (next_cr
&& next_null
) {
405 end
= next_cr
< next_null
? next_cr
: next_null
;
406 } else if (next_null
) {
411 if (!(flags
& FELF_DISCARD_FIRST
) || start
!= buf
) {
412 if (flags
& FELF_READ_ONLY
) {
413 size_t s
= end
- start
;
414 char *b
= para_malloc(s
+ 1);
417 ret
= line_handler(b
, private_data
);
421 ret
= line_handler(start
, private_data
);
428 i
= buf
+ size
- start
;
429 if (i
&& i
!= size
&& !(flags
& FELF_READ_ONLY
))
430 memmove(buf
, start
, i
);
434 /** Return the hex characters of the lower 4 bits. */
435 #define hex(a) (hexchar[(a) & 15])
437 static void write_size_header(char *buf
, int n
)
439 static char hexchar
[] = "0123456789abcdef";
441 buf
[0] = hex(n
>> 12);
442 buf
[1] = hex(n
>> 8);
443 buf
[2] = hex(n
>> 4);
449 * Read a four-byte hex-number and return its value.
451 * Each status item sent by para_server is prefixed with such a hex number in
452 * ASCII which describes the size of the status item.
454 * \param buf The buffer which must be at least four bytes long.
456 * \return The value of the hex number on success, \p -E_SIZE_PREFIX if the
457 * buffer did not contain only hex digits.
459 int read_size_header(const char *buf
)
463 for (i
= 0; i
< 4; i
++) {
464 unsigned char c
= buf
[i
];
466 if (c
>= '0' && c
<= '9') {
470 if (c
>= 'a' && c
<= 'f') {
474 return -E_SIZE_PREFIX
;
477 return -E_SIZE_PREFIX
;
482 * Safely print into a buffer at a given offset.
484 * \param b Determines the buffer, its size, and the offset.
485 * \param fmt The format string.
487 * This function prints into the buffer given by \a b at the offset which is
488 * also given by \a b. If there is not enough space to hold the result, the
489 * buffer size is doubled until the underlying call to vsnprintf() succeeds
490 * or the size of the buffer exceeds the maximal size specified in \a b.
492 * In the latter case the unmodified \a buf and \a offset values as well as the
493 * private_data pointer of \a b are passed to the \a max_size_handler of \a b.
494 * If this function succeeds, i.e. returns a non-negative value, the offset of
495 * \a b is reset to zero and the given data is written to the beginning of the
496 * buffer. If \a max_size_handler() returns a negative value, this value is
497 * returned by \a para_printf().
499 * Upon return, the offset of \a b is adjusted accordingly so that subsequent
500 * calls to this function append data to what is already contained in the
503 * It's OK to call this function with \p b->buf being \p NULL. In this case, an
504 * initial buffer is allocated.
506 * \return The number of bytes printed into the buffer (not including the
507 * terminating \p NULL byte) on success, negative on errors. If there is no
508 * size-bound on \a b, i.e. if \p b->max_size is zero, this function never
511 * \sa make_message(), vsnprintf(3).
513 __printf_2_3
int para_printf(struct para_buffer
*b
, const char *fmt
, ...)
515 int ret
, sz_off
= (b
->flags
& PBF_SIZE_PREFIX
)? 5 : 0;
518 b
->buf
= para_malloc(128);
523 char *p
= b
->buf
+ b
->offset
;
524 size_t size
= b
->size
- b
->offset
;
529 ret
= vsnprintf(p
+ sz_off
, size
- sz_off
, fmt
, ap
);
531 if (ret
> -1 && ret
< size
- sz_off
) { /* success */
532 b
->offset
+= ret
+ sz_off
;
534 write_size_header(p
, ret
);
538 /* check if we may grow the buffer */
539 if (!b
->max_size
|| 2 * b
->size
< b
->max_size
) { /* yes */
540 /* try again with more space */
542 b
->buf
= para_realloc(b
->buf
, b
->size
);
545 /* can't grow buffer */
546 if (!b
->offset
|| !b
->max_size_handler
) /* message too large */
547 return -ERRNO_TO_PARA_ERROR(ENOSPC
);
548 ret
= b
->max_size_handler(b
->buf
, b
->offset
, b
->private_data
);
555 /** \cond llong_minmax */
556 /* LLONG_MAX and LLONG_MIN might not be defined. */
558 #define LLONG_MAX 9223372036854775807LL
561 #define LLONG_MIN (-LLONG_MAX - 1LL)
563 /** \endcond llong_minmax */
566 * Convert a string to a 64-bit signed integer value.
568 * \param str The string to be converted.
569 * \param value Result pointer.
573 * \sa para_atoi32(), strtol(3), atoi(3).
575 int para_atoi64(const char *str
, int64_t *value
)
580 errno
= 0; /* To distinguish success/failure after call */
581 tmp
= strtoll(str
, &endptr
, 10);
582 if (errno
== ERANGE
&& (tmp
== LLONG_MAX
|| tmp
== LLONG_MIN
))
583 return -E_ATOI_OVERFLOW
;
584 if (errno
!= 0 && tmp
== 0) /* other error */
587 return -E_ATOI_NO_DIGITS
;
588 if (*endptr
!= '\0') /* Further characters after number */
589 return -E_ATOI_JUNK_AT_END
;
595 * Convert a string to a 32-bit signed integer value.
597 * \param str The string to be converted.
598 * \param value Result pointer.
604 int para_atoi32(const char *str
, int32_t *value
)
608 const int32_t max
= 2147483647;
610 ret
= para_atoi64(str
, &tmp
);
613 if (tmp
> max
|| tmp
< -max
- 1)
614 return -E_ATOI_OVERFLOW
;
619 static inline int loglevel_equal(const char *arg
, const char * const ll
)
621 return !strncasecmp(arg
, ll
, strlen(ll
));
625 * Compute the loglevel number from its name.
627 * \param txt The name of the loglevel (debug, info, ...).
629 * \return The numeric representation of the loglevel name.
631 int get_loglevel_by_name(const char *txt
)
633 if (loglevel_equal(txt
, "debug"))
635 if (loglevel_equal(txt
, "info"))
637 if (loglevel_equal(txt
, "notice"))
639 if (loglevel_equal(txt
, "warning"))
641 if (loglevel_equal(txt
, "error"))
643 if (loglevel_equal(txt
, "crit"))
645 if (loglevel_equal(txt
, "emerg"))
650 static int get_next_word(const char *buf
, const char *delim
, char **word
)
652 enum line_state_flags
{LSF_HAVE_WORD
= 1, LSF_BACKSLASH
= 2,
653 LSF_SINGLE_QUOTE
= 4, LSF_DOUBLE_QUOTE
= 8};
658 out
= para_malloc(strlen(buf
) + 1);
661 for (in
= buf
; *in
; in
++) {
666 if (state
& LSF_BACKSLASH
) /* \\ */
668 state
|= LSF_BACKSLASH
;
669 state
|= LSF_HAVE_WORD
;
673 if (state
& LSF_BACKSLASH
) { /* \n or \t */
674 *out
++ = (*in
== 'n')? '\n' : '\t';
675 state
&= ~LSF_BACKSLASH
;
680 if (state
& LSF_BACKSLASH
) /* \" */
682 if (state
& LSF_SINGLE_QUOTE
) /* '" */
684 if (state
& LSF_DOUBLE_QUOTE
) {
685 state
&= ~LSF_DOUBLE_QUOTE
;
688 state
|= LSF_HAVE_WORD
;
689 state
|= LSF_DOUBLE_QUOTE
;
692 if (state
& LSF_BACKSLASH
) /* \' */
694 if (state
& LSF_DOUBLE_QUOTE
) /* "' */
696 if (state
& LSF_SINGLE_QUOTE
) {
697 state
&= ~LSF_SINGLE_QUOTE
;
700 state
|= LSF_HAVE_WORD
;
701 state
|= LSF_SINGLE_QUOTE
;
704 for (p
= delim
; *p
; p
++) {
707 if (state
& LSF_BACKSLASH
)
709 if (state
& LSF_SINGLE_QUOTE
)
711 if (state
& LSF_DOUBLE_QUOTE
)
713 if (state
& LSF_HAVE_WORD
)
717 if (*p
) /* ignore delimiter at the beginning */
720 state
|= LSF_HAVE_WORD
;
722 state
&= ~LSF_BACKSLASH
;
725 if (!(state
& LSF_HAVE_WORD
))
727 ret
= -ERRNO_TO_PARA_ERROR(EINVAL
);
728 if (state
& LSF_BACKSLASH
) {
729 PARA_ERROR_LOG("trailing backslash\n");
732 if ((state
& LSF_SINGLE_QUOTE
) || (state
& LSF_DOUBLE_QUOTE
)) {
733 PARA_ERROR_LOG("unmatched quote character\n");
746 * Get the number of the word the cursor is on.
748 * \param buf The zero-terminated line buffer.
749 * \param delim Characters that separate words.
750 * \param point The cursor position.
752 * \return Zero-based word number.
754 int compute_word_num(const char *buf
, const char *delim
, int point
)
760 for (p
= buf
, num_words
= 0; ; p
+= ret
, num_words
++) {
761 ret
= get_next_word(p
, delim
, &word
);
765 if (p
+ ret
>= buf
+ point
)
772 * Free an array of words created by create_argv() or create_shifted_argv().
774 * \param argv A pointer previously obtained by \ref create_argv().
776 void free_argv(char **argv
)
782 for (i
= 0; argv
[i
]; i
++)
787 static int create_argv_offset(int offset
, const char *buf
, const char *delim
,
790 char *word
, **argv
= para_malloc((offset
+ 1) * sizeof(char *));
794 for (i
= 0; i
< offset
; i
++)
796 for (p
= buf
; p
&& *p
; p
+= ret
, i
++) {
797 ret
= get_next_word(p
, delim
, &word
);
802 argv
= para_realloc(argv
, (i
+ 2) * sizeof(char*));
817 * Split a buffer into words.
819 * This parser honors single and double quotes, backslash-escaped characters
820 * and special characters like \p \\n. The result contains pointers to copies
821 * of the words contained in \a buf and has to be freed by using \ref
824 * \param buf The buffer to be split.
825 * \param delim Each character in this string is treated as a separator.
826 * \param result The array of words is returned here.
828 * \return Number of words in \a buf, negative on errors.
830 int create_argv(const char *buf
, const char *delim
, char ***result
)
832 return create_argv_offset(0, buf
, delim
, result
);
836 * Split a buffer into words, offset one.
838 * This is similar to \ref create_argv() but the returned array is one element
839 * larger, words start at index one and element zero is initialized to \p NULL.
840 * Callers must set element zero to a non-NULL value before calling free_argv()
841 * on the returned array to avoid a memory leak.
843 * \param buf See \ref create_argv().
844 * \param delim See \ref create_argv().
845 * \param result See \ref create_argv().
847 * \return Number of words plus one on success, negative on errors.
849 int create_shifted_argv(const char *buf
, const char *delim
, char ***result
)
851 return create_argv_offset(1, buf
, delim
, result
);
855 * Find out if the given string is contained in the arg vector.
857 * \param arg The string to look for.
858 * \param argv The array to search.
860 * \return The first index whose value equals \a arg, or \p -E_ARG_NOT_FOUND if
861 * arg was not found in \a argv.
863 int find_arg(const char *arg
, char **argv
)
868 return -E_ARG_NOT_FOUND
;
869 for (i
= 0; argv
[i
]; i
++)
870 if (strcmp(arg
, argv
[i
]) == 0)
872 return -E_ARG_NOT_FOUND
;
876 * Compile a regular expression.
878 * This simple wrapper calls regcomp() and logs a message on errors.
880 * \param preg See regcomp(3).
881 * \param regex See regcomp(3).
882 * \param cflags See regcomp(3).
886 int para_regcomp(regex_t
*preg
, const char *regex
, int cflags
)
890 int ret
= regcomp(preg
, regex
, cflags
);
894 size
= regerror(ret
, preg
, NULL
, 0);
895 buf
= para_malloc(size
);
896 regerror(ret
, preg
, buf
, size
);
897 PARA_ERROR_LOG("%s\n", buf
);
903 * strdup() for not necessarily zero-terminated strings.
905 * \param src The source buffer.
906 * \param len The number of bytes to be copied.
908 * \return A 0-terminated buffer of length \a len + 1.
910 * This is similar to strndup(), which is a GNU extension. However, one
911 * difference is that strndup() returns \p NULL if insufficient memory was
912 * available while this function aborts in this case.
914 * \sa strdup(), \ref para_strdup().
916 char *safe_strdup(const char *src
, size_t len
)
920 assert(len
< (size_t)-1);
921 p
= para_malloc(len
+ 1);
929 * Copy the value of a key=value pair.
931 * This checks whether the given buffer starts with "key=", ignoring case. If
932 * yes, a copy of the value is returned. The source buffer may not be
935 * \param src The source buffer.
936 * \param len The number of bytes of the tag.
937 * \param key Only copy if it is the value of this key.
939 * \return A zero-terminated buffer, or \p NULL if the key was
940 * not of the given type.
942 char *key_value_copy(const char *src
, size_t len
, const char *key
)
944 int keylen
= strlen(key
);
948 if (strncasecmp(src
, key
, keylen
))
950 if (src
[keylen
] != '=')
952 return safe_strdup(src
+ keylen
+ 1, len
- keylen
- 1);
955 static bool utf8_mode(void)
957 static bool initialized
, have_utf8
;
960 char *info
= nl_langinfo(CODESET
);
961 have_utf8
= (info
&& strcmp(info
, "UTF-8") == 0);
963 PARA_INFO_LOG("%susing UTF-8 character encoding\n",
964 have_utf8
? "" : "not ");
970 * glibc's wcswidth returns -1 if the string contains a tab character, which
971 * makes the function next to useless. The two functions below are taken from
975 #define IsWPrint(wc) (iswprint(wc) || wc >= 0xa0)
977 static int mutt_wcwidth(wchar_t wc
, size_t pos
)
981 if (wc
== 0x09) /* tab */
982 return (pos
| 7) + 1 - pos
;
984 if (IsWPrint(wc
) && n
> 0)
993 static size_t mutt_wcswidth(const wchar_t *s
, size_t n
)
998 w
+= mutt_wcwidth(*s
++, w
);
1003 * Skip a given number of cells at the beginning of a string.
1005 * \param s The input string.
1006 * \param cells_to_skip Desired number of cells that should be skipped.
1007 * \param bytes_to_skip Result.
1009 * This function computes how many input bytes must be skipped to advance a
1010 * string by the given width. If the current character encoding is not UTF-8,
1011 * this is simply the given number of cells, i.e. \a cells_to_skip. Otherwise,
1012 * \a s is treated as a multibyte string and on successful return, \a s +
1013 * bytes_to_skip points to the start of a multibyte string such that the total
1014 * width of the multibyte characters that are skipped by advancing \a s that
1015 * many bytes equals at least \a cells_to_skip.
1019 int skip_cells(const char *s
, size_t cells_to_skip
, size_t *bytes_to_skip
)
1023 size_t n
, bytes_parsed
, cells_skipped
;
1026 if (cells_to_skip
== 0)
1029 *bytes_to_skip
= cells_to_skip
;
1032 bytes_parsed
= cells_skipped
= 0;
1033 memset(&ps
, 0, sizeof(ps
));
1035 while (cells_to_skip
> cells_skipped
) {
1038 mbret
= mbrtowc(&wc
, s
+ bytes_parsed
, n
- bytes_parsed
, &ps
);
1040 if (mbret
== (size_t)-1 || mbret
== (size_t)-2)
1041 return -ERRNO_TO_PARA_ERROR(EILSEQ
);
1042 bytes_parsed
+= mbret
;
1043 cells_skipped
+= mutt_wcwidth(wc
, cells_skipped
);
1045 *bytes_to_skip
= bytes_parsed
;
1050 * Compute the width of an UTF-8 string.
1052 * \param s The string.
1053 * \param result The width of \a s is returned here.
1055 * If not in UTF8-mode. this function is just a wrapper for strlen(3).
1056 * Otherwise \a s is treated as an UTF-8 string and its display width is
1057 * computed. Note that this function may fail if the underlying call to
1058 * mbsrtowcs(3) fails, so the caller must check the return value.
1060 * \sa nl_langinfo(3), wcswidth(3).
1064 __must_check
int strwidth(const char *s
, size_t *result
)
1066 const char *src
= s
;
1068 static wchar_t *dest
;
1072 * Never call any log function here. This may result in an endless loop
1073 * as para_gui's para_log() calls this function.
1077 *result
= strlen(s
);
1080 memset(&state
, 0, sizeof(state
));
1082 num_wchars
= mbsrtowcs(NULL
, &src
, 0, &state
);
1083 if (num_wchars
== (size_t)-1)
1084 return -ERRNO_TO_PARA_ERROR(errno
);
1085 if (num_wchars
== 0)
1087 dest
= para_malloc(num_wchars
* sizeof(*dest
));
1089 memset(&state
, 0, sizeof(state
));
1090 num_wchars
= mbsrtowcs(dest
, &src
, num_wchars
, &state
);
1091 assert(num_wchars
> 0 && num_wchars
!= (size_t)-1);
1092 *result
= mutt_wcswidth(dest
, num_wchars
);