lib/charset.c

   1 /*
   2  * $Id$
   3  *
   4  * DEBUG:
   5  * AUTHOR: Henrik Nordstrom <henrik@henriknordstrom.net>
   6  *
   7  * Copyright (C) 2008 Henrik Nordstrom
   8  *
   9  * SQUID Web Proxy Cache          http://www.squid-cache.org/
  10  * ----------------------------------------------------------
  11  *
  12  *  This program is free software; you can redistribute it and/or modify
  13  *  it under the terms of the GNU General Public License as published by
  14  *  the Free Software Foundation; either version 2 of the License, or
  15  *  (at your option) any later version.
  16  *
  17  *  This program is distributed in the hope that it will be useful,
  18  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  *  GNU General Public License for more details.
  21  *
  22  *  You should have received a copy of the GNU General Public License
  23  *  along with this program; if not, write to the Free Software
  24  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
  25  *
  26  */
  27
  28 #include "squid.h"
  29 #include "charset.h"
  30
  31 /** Convert ISO-LATIN-1 to UTF-8 */
  32 char *
  33 latin1_to_utf8(char *out, size_t size, const char *in)
  34 {
  35     unsigned char *p = (unsigned char *)out;
  36     for (; *in && size > 2; in++) {
  37         unsigned char ch = (unsigned char)*in;
  38         if (ch < 0x80) {
  39             *p++ = ch;
  40             size--;
  41         } else {
  42             *p++ = (ch >> 6) | 0xc0;
  43             size--;
  44             *p++ = (ch & 0x3f) | 0x80;
  45             size--;
  46         }
  47     }
  48     *p = '\0';
  49     if (*in)
  50         return NULL;
  51     return out;
  52 }