compat/utf8proc.c

   1 /*
   2  * Copyright (c) 2016 Joshua Rubin <joshua@rubixconsulting.com>
   3  *
   4  * Permission to use, copy, modify, and distribute this software for any
   5  * purpose with or without fee is hereby granted, provided that the above
   6  * copyright notice and this permission notice appear in all copies.
   7  *
   8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  12  * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
  13  * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
  14  * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  15  */
  16
  17 #include <sys/types.h>
  18
  19 #include <utf8proc.h>
  20
  21 #include "compat.h"
  22
  23 int
  24 utf8proc_wcwidth(wchar_t wc)
  25 {
  26         int     cat;
  27
  28         cat = utf8proc_category(wc);
  29         if (cat == UTF8PROC_CATEGORY_CO) {
  30                 /*
  31                  * The private use category is where powerline and similar
  32                  * codepoints are stored, they have "ambiguous" width - use 1.
  33                  */
  34                 return (1);
  35         }
  36         return (utf8proc_charwidth(wc));
  37 }
  38
  39 int
  40 utf8proc_mbtowc(wchar_t *pwc, const char *s, size_t n)
  41 {
  42         utf8proc_ssize_t        slen;
  43
  44         if (s == NULL)
  45                 return (0);
  46
  47         /*
  48          * *pwc == -1 indicates invalid codepoint
  49          * slen < 0 indicates an error
  50          */
  51         slen = utf8proc_iterate(s, n, pwc);
  52         if (*pwc == (wchar_t)-1 || slen < 0)
  53                 return (-1);
  54         return (slen);
  55 }
  56
  57 int
  58 utf8proc_wctomb(char *s, wchar_t wc)
  59 {
  60         if (s == NULL)
  61                 return (0);
  62
  63         if (!utf8proc_codepoint_valid(wc))
  64                 return (-1);
  65         return (utf8proc_encode_char(wc, s));
  66 }