lib/unicase/u8-casefold.c

   1 /* Casefolding mapping for UTF-8 strings (locale dependent).
   2    Copyright (C) 2009-2018 Free Software Foundation, Inc.
   3    Written by Bruno Haible <bruno@clisp.org>, 2009.
   4
   5    This program is free software: you can redistribute it and/or modify it
   6    under the terms of the GNU Lesser General Public License as published
   7    by the Free Software Foundation; either version 3 of the License, or
   8    (at your option) any later version.
   9
  10    This program is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public License
  16    along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
  17
  18 #include <config.h>
  19
  20 /* Specification.  */
  21 #include "unicase.h"
  22
  23 #define FUNC u8_casefold
  24 #define UNIT uint8_t
  25 #define U_CT_CASEFOLD u8_ct_casefold
  26 #include "u-casefold.h"
  27
  28
  29 #ifdef TEST
  30
  31 #include <locale.h>
  32 #include <stdio.h>
  33 #include <stdlib.h>
  34 #include <string.h>
  35
  36 /* Read the contents of an input stream, and return it, terminated with a NUL
  37    byte. */
  38 char *
  39 read_file (FILE *stream)
  40 {
  41 #define BUFSIZE 4096
  42   char *buf = NULL;
  43   int alloc = 0;
  44   int size = 0;
  45   int count;
  46
  47   while (! feof (stream))
  48     {
  49       if (size + BUFSIZE > alloc)
  50         {
  51           alloc = alloc + alloc / 2;
  52           if (alloc < size + BUFSIZE)
  53             alloc = size + BUFSIZE;
  54           buf = realloc (buf, alloc);
  55           if (buf == NULL)
  56             {
  57               fprintf (stderr, "out of memory\n");
  58               exit (1);
  59             }
  60         }
  61       count = fread (buf + size, 1, BUFSIZE, stream);
  62       if (count == 0)
  63         {
  64           if (ferror (stream))
  65             {
  66               perror ("fread");
  67               exit (1);
  68             }
  69         }
  70       else
  71         size += count;
  72     }
  73   buf = realloc (buf, size + 1);
  74   if (buf == NULL)
  75     {
  76       fprintf (stderr, "out of memory\n");
  77       exit (1);
  78     }
  79   buf[size] = '\0';
  80   return buf;
  81 #undef BUFSIZE
  82 }
  83
  84 int
  85 main (int argc, char * argv[])
  86 {
  87   setlocale (LC_ALL, "");
  88   if (argc == 1)
  89     {
  90       /* Display the case folded input string.  */
  91       char *input = read_file (stdin);
  92       int length = strlen (input);
  93       size_t output_length;
  94       uint8_t *output =
  95         u8_casefold ((uint8_t *) input, length, uc_locale_language (),
  96                     NULL,
  97                     NULL, &output_length);
  98
  99       fwrite (output, 1, output_length, stdout);
 100
 101       return 0;
 102     }
 103   else
 104     return 1;
 105 }
 106
 107 #endif /* TEST */