lib/ces_gbk.h

   1 /*
   2  * Copyright (C) 1999-2001, 2005 Free Software Foundation, Inc.
   3  * This file is part of the GNU LIBICONV Library.
   4  *
   5  * The GNU LIBICONV Library is free software; you can redistribute it
   6  * and/or modify it under the terms of the GNU Library General Public
   7  * License as published by the Free Software Foundation; either version 2
   8  * of the License, or (at your option) any later version.
   9  *
  10  * The GNU LIBICONV Library is distributed in the hope that it will be
  11  * useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * Library General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Library General Public
  16  * License along with the GNU LIBICONV Library; see the file COPYING.LIB.
  17  * If not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 /*
  21  * GBK
  22  */
  23
  24 static int
  25 ces_gbk_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, int n)
  26 {
  27   unsigned char c = *s;
  28
  29   /* Code set 0 (ASCII or GB 1988-89) */
  30   if (c < 0x80)
  31     return ascii_mbtowc(conv,pwc,s,n);
  32   /* Code set 1 (GBK) */
  33   if (c >= 0x81 && c < 0xff) {
  34     if (n < 2)
  35       return RET_TOOFEW(0);
  36     return gbk_mbtowc(conv,pwc,s,2);
  37   }
  38   return RET_ILSEQ;
  39 }
  40
  41 static int
  42 ces_gbk_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, int n)
  43 {
  44   unsigned char buf[2];
  45   int ret;
  46
  47   /* Code set 0 (ASCII or GB 1988-89) */
  48   ret = ascii_wctomb(conv,r,wc,n);
  49   if (ret != RET_ILUNI)
  50     return ret;
  51
  52   /* Code set 1 (GBK) */
  53   ret = gbk_wctomb(conv,buf,wc,2);
  54   if (ret != RET_ILUNI) {
  55     if (ret != 2) abort();
  56     if (n < 2)
  57       return RET_TOOSMALL;
  58     r[0] = buf[0];
  59     r[1] = buf[1];
  60     return 2;
  61   }
  62
  63   return RET_ILUNI;
  64 }