1 /* Copyright (C) 2004 Andre Noll <maan@tuebingen.mpg.de>, see file COPYING. */
3 /** \file string.c Memory allocation and string handling functions. */
8 #include <sys/utsname.h> /* uname() */
18 * Paraslash's version of realloc().
20 * \param p Pointer to the memory block, may be \p NULL.
21 * \param size The desired new size.
23 * A wrapper for realloc(3). It calls \p exit(\p EXIT_FAILURE) on errors,
24 * i.e. there is no need to check the return value in the caller.
26 * \return A pointer to newly allocated memory which is suitably aligned for
27 * any kind of variable and may be different from \a p.
31 __must_check void *para_realloc(void *p, size_t size)
34 * No need to check for NULL pointers: If p is NULL, the call
35 * to realloc is equivalent to malloc(size)
38 if (!(p = realloc(p, size))) {
39 PARA_EMERG_LOG("realloc failed (size = %zu), aborting\n",
47 * Paraslash's version of malloc().
49 * \param size The desired new size.
51 * A wrapper for malloc(3) which exits on errors.
53 * \return A pointer to the allocated memory, which is suitably aligned for any
58 __must_check __malloc void *alloc(size_t size)
65 PARA_EMERG_LOG("malloc failed (size = %zu), aborting\n",
73 * Allocate and initialize memory.
75 * \param size The desired new size.
77 * \return A pointer to the allocated and zeroed-out memory, which is suitably
78 * aligned for any kind of variable.
80 * \sa \ref alloc(), calloc(3).
82 __must_check __malloc void *zalloc(size_t size)
84 void *ret = alloc(size);
91 * Paraslash's version of strdup().
93 * \param s The string to be duplicated.
95 * A strdup(3)-like function which aborts if insufficient memory was available
96 * to allocate the duplicated string, absolving the caller from the
97 * responsibility to check for failure.
99 * \return A pointer to the duplicated string. Unlike strdup(3), the caller may
100 * pass NULL, in which case the function returns a pointer to an empty string.
101 * Regardless of whether or not NULL was passed, the returned string is
102 * allocated on the heap and has to be freed by the caller.
106 __must_check __malloc char *para_strdup(const char *s)
108 char *dupped_string = strdup(s? s: "");
110 assert(dupped_string);
111 return dupped_string;
115 * Print a formatted message to a dynamically allocated string.
117 * \param result The formatted string is returned here.
118 * \param fmt The format string.
119 * \param ap Initialized list of arguments.
121 * This function is similar to vasprintf(), a GNU extension which is not in C
122 * or POSIX. It allocates a string large enough to hold the output including
123 * the terminating null byte. The allocated string is returned via the first
124 * argument and must be freed by the caller. However, unlike vasprintf(), this
125 * function calls exit() if insufficient memory is available, while vasprintf()
126 * returns -1 in this case.
128 * \return Number of bytes written, not including the terminating \p NULL
131 * \sa printf(3), vsnprintf(3), va_start(3), vasprintf(3), \ref xasprintf().
133 __printf_2_0 unsigned xvasprintf(char **result, const char *fmt, va_list ap)
139 *result = alloc(size + 1);
141 ret = vsnprintf(*result, size, fmt, aq);
144 if (ret < size) /* OK */
147 *result = para_realloc(*result, size);
149 ret = vsnprintf(*result, size, fmt, aq);
151 assert(ret >= 0 && ret < size);
156 * Print to a dynamically allocated string, variable number of arguments.
158 * \param result See \ref xvasprintf().
159 * \param fmt Usual format string.
161 * \return The return value of the underlying call to \ref xvasprintf().
163 * \sa \ref xvasprintf() and the references mentioned there.
165 __printf_2_3 unsigned xasprintf(char **result, const char *fmt, ...)
171 ret = xvasprintf(result, fmt, ap);
177 * Allocate a sufficiently large string and print into it.
179 * \param fmt A usual format string.
181 * Produce output according to \p fmt. No artificial bound on the length of the
182 * resulting string is imposed.
184 * \return This function either returns a pointer to a string that must be
185 * freed by the caller or aborts without returning.
187 * \sa printf(3), \ref xasprintf().
189 __must_check __printf_1_2 __malloc char *make_message(const char *fmt, ...)
195 xvasprintf(&msg, fmt, ap);
201 * Free the content of a pointer and set it to NULL.
203 * \param arg A pointer to the pointer whose content should be freed.
205 * If arg is NULL, the function returns immediately. Otherwise it frees the
206 * memory pointed to by *arg and sets *arg to NULL. Hence callers have to pass
207 * the *address* of the pointer variable that points to the memory which should
210 void freep(void *arg)
220 * Paraslash's version of strcat().
222 * \param a String to be appended to.
223 * \param b String to append.
225 * Append \p b to \p a.
227 * \return If \a a is \p NULL, return a pointer to a copy of \a b, i.e.
228 * para_strcat(NULL, b) is equivalent to para_strdup(b). If \a b is \p NULL,
229 * return \a a without making a copy of \a a. Otherwise, construct the
230 * concatenation \a c, free \a a (but not \a b) and return \a c.
234 __must_check __malloc char *para_strcat(char *a, const char *b)
239 return para_strdup(b);
242 tmp = make_message("%s%s", a, b);
248 * Get the logname of the current user.
250 * \return A dynamically allocated string that must be freed by the caller. On
251 * errors, the string "unknown_user" is returned, i.e. this function never
256 __must_check __malloc char *para_logname(void)
258 struct passwd *pw = getpwuid(getuid());
259 return para_strdup(pw? pw->pw_name : "unknown_user");
263 * Get the home directory of the current user.
265 * \return A dynamically allocated string that must be freed by the caller. If
266 * the home directory could not be found, this function returns "/tmp".
268 __must_check __malloc char *para_homedir(void)
270 struct passwd *pw = getpwuid(getuid());
271 return para_strdup(pw? pw->pw_dir : "/tmp");
275 * Get the own hostname.
277 * \return A dynamically allocated string containing the hostname.
281 __malloc char *para_hostname(void)
286 return para_strdup(u.nodename);
290 * Call a custom function for each complete line.
292 * \param flags Any combination of flags defined in \ref for_each_line_flags.
293 * \param buf The buffer containing data separated by newlines.
294 * \param size The number of bytes in \a buf.
295 * \param line_handler The custom function.
296 * \param private_data Pointer passed to \a line_handler.
298 * For each complete line in \p buf, \p line_handler is called. The first
299 * argument to \p line_handler is (a copy of) the current line, and \p
300 * private_data is passed as the second argument. If the \p FELF_READ_ONLY
301 * flag is unset, a pointer into \a buf is passed to the line handler,
302 * otherwise a pointer to a copy of the current line is passed instead. This
303 * copy is freed immediately after the line handler returns.
305 * The function returns if \p line_handler returns a negative value or no more
306 * lines are in the buffer. The rest of the buffer (last chunk containing an
307 * incomplete line) is moved to the beginning of the buffer if FELF_READ_ONLY is
310 * \return On success this function returns the number of bytes not handled to
311 * \p line_handler. The only possible error is a negative return value from the
312 * line handler. In this case processing stops and the return value of the line
313 * handler is returned to indicate failure.
315 * \sa \ref for_each_line_flags.
317 int for_each_line(unsigned flags, char *buf, size_t size,
318 line_handler_t *line_handler, void *private_data)
320 char *start = buf, *end;
321 int ret, i, num_lines = 0;
323 // PARA_NOTICE_LOG("buf: %s\n", buf);
324 while (start < buf + size) {
328 next_cr = memchr(start, '\n', buf + size - start);
329 next_null = memchr(start, '\0', next_cr?
330 next_cr - start : buf + size - start);
331 if (!next_cr && !next_null)
338 if (!(flags & FELF_DISCARD_FIRST) || start != buf) {
339 if (flags & FELF_READ_ONLY) {
340 size_t s = end - start;
341 char *b = alloc(s + 1);
344 ret = line_handler(b, private_data);
348 ret = line_handler(start, private_data);
355 i = buf + size - start;
356 if (i && i != size && !(flags & FELF_READ_ONLY))
357 memmove(buf, start, i);
361 /** Return the hex characters of the lower 4 bits. */
362 #define hex(a) (hexchar[(a) & 15])
364 static void write_size_header(char *buf, int n)
366 static char hexchar[] = "0123456789abcdef";
368 buf[0] = hex(n >> 12);
369 buf[1] = hex(n >> 8);
370 buf[2] = hex(n >> 4);
376 * Read a four-byte hex-number and return its value.
378 * Each status item sent by para_server is prefixed with such a hex number in
379 * ASCII which describes the size of the status item.
381 * \param buf The buffer which must be at least four bytes long.
383 * \return The value of the hex number on success, \p -E_SIZE_PREFIX if the
384 * buffer did not contain only hex digits.
386 int read_size_header(const char *buf)
390 for (i = 0; i < 4; i++) {
391 unsigned char c = buf[i];
393 if (c >= '0' && c <= '9') {
397 if (c >= 'a' && c <= 'f') {
401 return -E_SIZE_PREFIX;
404 return -E_SIZE_PREFIX;
409 * Safely print into a buffer at a given offset.
411 * \param b Determines the buffer, its size, and the offset.
412 * \param fmt The format string.
414 * This function prints into the buffer given by \a b at the offset which is
415 * also given by \a b. If there is not enough space to hold the result, the
416 * buffer size is doubled until the underlying call to vsnprintf() succeeds
417 * or the size of the buffer exceeds the maximal size specified in \a b.
419 * In the latter case the unmodified \a buf and \a offset values as well as the
420 * private_data pointer of \a b are passed to the \a max_size_handler of \a b.
421 * If this function succeeds, i.e. returns a non-negative value, the offset of
422 * \a b is reset to zero and the given data is written to the beginning of the
423 * buffer. If \a max_size_handler() returns a negative value, this value is
424 * returned by \a para_printf().
426 * Upon return, the offset of \a b is adjusted accordingly so that subsequent
427 * calls to this function append data to what is already contained in the
430 * It's OK to call this function with \p b->buf being \p NULL. In this case, an
431 * initial buffer is allocated.
433 * \return The number of bytes printed into the buffer (not including the
434 * terminating \p NULL byte) on success, negative on errors. If there is no
435 * size-bound on \a b, i.e. if \p b->max_size is zero, this function never
438 * \sa make_message(), vsnprintf(3).
440 __printf_2_3 int para_printf(struct para_buffer *b, const char *fmt, ...)
442 int ret, sz_off = (b->flags & PBF_SIZE_PREFIX)? 5 : 0;
450 char *p = b->buf + b->offset;
451 size_t size = b->size - b->offset;
456 ret = vsnprintf(p + sz_off, size - sz_off, fmt, ap);
458 if (ret > -1 && ret < size - sz_off) { /* success */
459 b->offset += ret + sz_off;
461 write_size_header(p, ret);
465 /* check if we may grow the buffer */
466 if (!b->max_size || 2 * b->size < b->max_size) { /* yes */
467 /* try again with more space */
469 b->buf = para_realloc(b->buf, b->size);
472 /* can't grow buffer */
473 if (!b->offset || !b->max_size_handler) /* message too large */
474 return -ERRNO_TO_PARA_ERROR(ENOSPC);
475 ret = b->max_size_handler(b->buf, b->offset, b->private_data);
482 /** \cond llong_minmax */
483 /* LLONG_MAX and LLONG_MIN might not be defined. */
485 #define LLONG_MAX 9223372036854775807LL
488 #define LLONG_MIN (-LLONG_MAX - 1LL)
490 /** \endcond llong_minmax */
493 * Convert a string to a 64-bit signed integer value.
495 * \param str The string to be converted.
496 * \param value Result pointer.
500 * \sa \ref para_atoi32(), strtol(3), atoi(3).
502 int para_atoi64(const char *str, int64_t *value)
507 errno = 0; /* To distinguish success/failure after call */
508 tmp = strtoll(str, &endptr, 10);
509 if (errno == ERANGE && (tmp == LLONG_MAX || tmp == LLONG_MIN))
510 return -E_ATOI_OVERFLOW;
512 * If there were no digits at all, strtoll() stores the original value
516 return -E_ATOI_NO_DIGITS;
518 * The implementation may also set errno and return 0 in case no
519 * conversion was performed.
521 if (errno != 0 && tmp == 0)
522 return -E_ATOI_NO_DIGITS;
523 if (*endptr != '\0') /* Further characters after number */
524 return -E_ATOI_JUNK_AT_END;
530 * Convert a string to a 32-bit signed integer value.
532 * \param str The string to be converted.
533 * \param value Result pointer.
537 * \sa \ref para_atoi64().
539 int para_atoi32(const char *str, int32_t *value)
543 const int32_t max = 2147483647;
545 ret = para_atoi64(str, &tmp);
548 if (tmp > max || tmp < -max - 1)
549 return -E_ATOI_OVERFLOW;
554 static inline int loglevel_equal(const char *arg, const char * const ll)
556 return !strncasecmp(arg, ll, strlen(ll));
560 * Compute the loglevel number from its name.
562 * \param txt The name of the loglevel (debug, info, ...).
564 * \return The numeric representation of the loglevel name.
566 int get_loglevel_by_name(const char *txt)
568 if (loglevel_equal(txt, "debug"))
570 if (loglevel_equal(txt, "info"))
572 if (loglevel_equal(txt, "notice"))
574 if (loglevel_equal(txt, "warning"))
576 if (loglevel_equal(txt, "error"))
578 if (loglevel_equal(txt, "crit"))
580 if (loglevel_equal(txt, "emerg"))
585 static int get_next_word(const char *buf, const char *delim, char **word)
587 enum line_state_flags {LSF_HAVE_WORD = 1, LSF_BACKSLASH = 2,
588 LSF_SINGLE_QUOTE = 4, LSF_DOUBLE_QUOTE = 8};
593 out = alloc(strlen(buf) + 1);
596 for (in = buf; *in; in++) {
601 if (state & LSF_BACKSLASH) /* \\ */
603 state |= LSF_BACKSLASH;
604 state |= LSF_HAVE_WORD;
608 if (state & LSF_BACKSLASH) { /* \n or \t */
609 *out++ = (*in == 'n')? '\n' : '\t';
610 state &= ~LSF_BACKSLASH;
615 if (state & LSF_BACKSLASH) /* \" */
617 if (state & LSF_SINGLE_QUOTE) /* '" */
619 if (state & LSF_DOUBLE_QUOTE) {
620 state &= ~LSF_DOUBLE_QUOTE;
623 state |= LSF_HAVE_WORD;
624 state |= LSF_DOUBLE_QUOTE;
627 if (state & LSF_BACKSLASH) /* \' */
629 if (state & LSF_DOUBLE_QUOTE) /* "' */
631 if (state & LSF_SINGLE_QUOTE) {
632 state &= ~LSF_SINGLE_QUOTE;
635 state |= LSF_HAVE_WORD;
636 state |= LSF_SINGLE_QUOTE;
639 for (p = delim; *p; p++) {
642 if (state & LSF_BACKSLASH)
644 if (state & LSF_SINGLE_QUOTE)
646 if (state & LSF_DOUBLE_QUOTE)
648 if (state & LSF_HAVE_WORD)
652 if (*p) /* ignore delimiter at the beginning */
655 state |= LSF_HAVE_WORD;
657 state &= ~LSF_BACKSLASH;
660 if (!(state & LSF_HAVE_WORD))
662 ret = -ERRNO_TO_PARA_ERROR(EINVAL);
663 if (state & LSF_BACKSLASH) {
664 PARA_ERROR_LOG("trailing backslash\n");
667 if ((state & LSF_SINGLE_QUOTE) || (state & LSF_DOUBLE_QUOTE)) {
668 PARA_ERROR_LOG("unmatched quote character\n");
681 * Get the number of the word the cursor is on.
683 * \param buf The zero-terminated line buffer.
684 * \param delim Characters that separate words.
685 * \param point The cursor position.
687 * \return Zero-based word number.
689 int compute_word_num(const char *buf, const char *delim, int point)
695 for (p = buf, num_words = 0; ; p += ret, num_words++) {
696 ret = get_next_word(p, delim, &word);
700 if (p + ret >= buf + point)
707 * Free an array of words created by create_argv() or create_shifted_argv().
709 * \param argv A pointer previously obtained by \ref create_argv().
711 void free_argv(char **argv)
717 for (i = 0; argv[i]; i++)
722 static int create_argv_offset(int offset, const char *buf, const char *delim,
725 char *word, **argv = alloc((offset + 1) * sizeof(char *));
729 for (i = 0; i < offset; i++)
731 for (p = buf; p && *p; p += ret, i++) {
732 ret = get_next_word(p, delim, &word);
737 argv = para_realloc(argv, (i + 2) * sizeof(char*));
752 * Split a buffer into words.
754 * This parser honors single and double quotes, backslash-escaped characters
755 * and special characters like \\n. The result contains pointers to copies of
756 * the words contained in buf and has to be freed by using \ref free_argv().
758 * \param buf The buffer to be split.
759 * \param delim Each character in this string is treated as a separator.
760 * \param result The array of words is returned here.
762 * It's OK to pass NULL as the buffer argument. This is equivalent to passing
765 * \return Number of words in buf, negative on errors. The array returned
766 * through the result pointer is NULL terminated.
768 int create_argv(const char *buf, const char *delim, char ***result)
770 return create_argv_offset(0, buf, delim, result);
774 * Split a buffer into words, offset one.
776 * This is similar to \ref create_argv() but the returned array is one element
777 * larger, words start at index one and element zero is initialized to \p NULL.
778 * Callers must set element zero to a non-NULL value before calling free_argv()
779 * on the returned array to avoid a memory leak.
781 * \param buf See \ref create_argv().
782 * \param delim See \ref create_argv().
783 * \param result See \ref create_argv().
785 * \return Number of words plus one on success, negative on errors.
787 int create_shifted_argv(const char *buf, const char *delim, char ***result)
789 return create_argv_offset(1, buf, delim, result);
793 * Find out if the given string is contained in the arg vector.
795 * \param arg The string to look for.
796 * \param argv The array to search.
798 * \return The first index whose value equals \a arg, or \p -E_ARG_NOT_FOUND if
799 * arg was not found in \a argv.
801 int find_arg(const char *arg, char **argv)
806 return -E_ARG_NOT_FOUND;
807 for (i = 0; argv[i]; i++)
808 if (strcmp(arg, argv[i]) == 0)
810 return -E_ARG_NOT_FOUND;
814 * Compile a regular expression.
816 * This simple wrapper calls regcomp() and logs a message on errors.
818 * \param preg See regcomp(3).
819 * \param regex See regcomp(3).
820 * \param cflags See regcomp(3).
824 int para_regcomp(regex_t *preg, const char *regex, int cflags)
828 int ret = regcomp(preg, regex, cflags);
832 size = regerror(ret, preg, NULL, 0);
834 regerror(ret, preg, buf, size);
835 PARA_ERROR_LOG("%s\n", buf);
841 * strdup() for not necessarily zero-terminated strings.
843 * \param src The source buffer.
844 * \param len The number of bytes to be copied.
846 * \return A 0-terminated buffer of length \a len + 1.
848 * This is similar to strndup(), which is a GNU extension. However, one
849 * difference is that strndup() returns \p NULL if insufficient memory was
850 * available while this function aborts in this case.
852 * \sa strdup(), \ref para_strdup().
854 char *safe_strdup(const char *src, size_t len)
858 assert(len < (size_t)-1);
867 * Copy the value of a key=value pair.
869 * This checks whether the given buffer starts with "key=", ignoring case. If
870 * yes, a copy of the value is returned. The source buffer may not be
873 * \param src The source buffer.
874 * \param len The number of bytes of the tag.
875 * \param key Only copy if it is the value of this key.
877 * \return A zero-terminated buffer, or \p NULL if the key was
878 * not of the given type.
880 char *key_value_copy(const char *src, size_t len, const char *key)
882 int keylen = strlen(key);
886 if (strncasecmp(src, key, keylen))
888 if (src[keylen] != '=')
890 return safe_strdup(src + keylen + 1, len - keylen - 1);
893 static bool utf8_mode(void)
895 static bool initialized, have_utf8;
898 char *info = nl_langinfo(CODESET);
899 have_utf8 = (info && strcmp(info, "UTF-8") == 0);
901 PARA_INFO_LOG("%susing UTF-8 character encoding\n",
902 have_utf8? "" : "not ");
907 static int xwcwidth(wchar_t wc, size_t pos)
911 /* special-case for tab */
912 if (wc == 0x09) /* tab */
913 return (pos | 7) + 1 - pos;
915 /* wcswidth() returns -1 for non-printable characters */
916 return n >= 0? n : 1;
919 static size_t xwcswidth(const wchar_t *s, size_t n)
924 w += xwcwidth(*s++, w);
929 * Skip a given number of cells at the beginning of a string.
931 * \param s The input string.
932 * \param cells_to_skip Desired number of cells that should be skipped.
933 * \param bytes_to_skip Result.
935 * This function computes how many input bytes must be skipped to advance a
936 * string by the given width. If the current character encoding is not UTF-8,
937 * this is simply the given number of cells, i.e. \a cells_to_skip. Otherwise,
938 * \a s is treated as a multibyte string and on successful return, \a s +
939 * bytes_to_skip points to the start of a multibyte string such that the total
940 * width of the multibyte characters that are skipped by advancing \a s that
941 * many bytes equals at least \a cells_to_skip.
945 int skip_cells(const char *s, size_t cells_to_skip, size_t *bytes_to_skip)
949 size_t n, bytes_parsed, cells_skipped;
952 if (cells_to_skip == 0)
955 *bytes_to_skip = cells_to_skip;
958 bytes_parsed = cells_skipped = 0;
959 memset(&ps, 0, sizeof(ps));
961 while (cells_to_skip > cells_skipped) {
964 mbret = mbrtowc(&wc, s + bytes_parsed, n - bytes_parsed, &ps);
966 if (mbret == (size_t)-1 || mbret == (size_t)-2)
967 return -ERRNO_TO_PARA_ERROR(EILSEQ);
968 bytes_parsed += mbret;
969 cells_skipped += xwcwidth(wc, cells_skipped);
971 *bytes_to_skip = bytes_parsed;
976 * Compute the width of an UTF-8 string.
978 * \param s The string.
979 * \param result The width of \a s is returned here.
981 * If not in UTF8-mode. this function is just a wrapper for strlen(3).
982 * Otherwise \a s is treated as an UTF-8 string and its display width is
983 * computed. Note that this function may fail if the underlying call to
984 * mbsrtowcs(3) fails, so the caller must check the return value.
986 * \sa nl_langinfo(3), wcswidth(3).
990 __must_check int strwidth(const char *s, size_t *result)
994 static wchar_t *dest;
998 * Never call any log function here. This may result in an endless loop
999 * as para_gui's para_log() calls this function.
1003 *result = strlen(s);
1006 memset(&state, 0, sizeof(state));
1008 num_wchars = mbsrtowcs(NULL, &src, 0, &state);
1009 if (num_wchars == (size_t)-1)
1010 return -ERRNO_TO_PARA_ERROR(errno);
1011 if (num_wchars == 0)
1013 dest = alloc((num_wchars + 1) * sizeof(*dest));
1015 memset(&state, 0, sizeof(state));
1016 num_wchars = mbsrtowcs(dest, &src, num_wchars, &state);
1017 assert(num_wchars > 0 && num_wchars != (size_t)-1);
1018 *result = xwcswidth(dest, num_wchars);
1024 * Truncate and sanitize a (wide character) string.
1026 * This replaces all non-printable characters by spaces and makes sure that the
1027 * modified string does not exceed the given maximal width.
1029 * \param src The source string in multi-byte form.
1030 * \param max_width The maximal number of cells the result may occupy.
1031 * \param result Sanitized multi-byte string, must be freed by caller.
1032 * \param width The width of the sanitized string, always <= max_width.
1034 * The function is wide-character aware but falls back to C strings for
1035 * non-UTF-8 locales.
1037 * \return Standard. On success, *result points to a sanitized copy of the
1038 * given string. This copy was allocated with malloc() and should hence be
1039 * freed when the caller is no longer interested in the result.
1041 * The function fails if the given string contains an invalid multibyte
1042 * sequence. In this case, *result is set to NULL, and *width to zero.
1044 __must_check int sanitize_str(const char *src, size_t max_width,
1045 char **result, size_t *width)
1048 static wchar_t *wcs;
1049 size_t num_wchars, n;
1052 *result = para_strdup(src);
1053 /* replace non-printable characters by spaces */
1054 for (n = 0; n < max_width && src[n]; n++) {
1055 if (!isprint((unsigned char)src[n]))
1058 (*result)[n] = '\0';
1064 memset(&state, 0, sizeof(state));
1065 num_wchars = mbsrtowcs(NULL, &src, 0, &state);
1066 if (num_wchars == (size_t)-1)
1067 return -ERRNO_TO_PARA_ERROR(errno);
1068 wcs = alloc((num_wchars + 1) * sizeof(*wcs));
1069 memset(&state, 0, sizeof(state));
1070 num_wchars = mbsrtowcs(wcs, &src, num_wchars + 1, &state);
1071 assert(num_wchars != (size_t)-1);
1072 for (n = 0; n < num_wchars && *width < max_width; n++) {
1073 if (!iswprint(wcs[n]))
1075 *width += xwcwidth(wcs[n], *width);
1078 n = wcstombs(NULL, wcs, 0) + 1;
1080 num_wchars = wcstombs(*result, wcs, n);
1081 assert(num_wchars != (size_t)-1);