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libiconv

    1: /*
    2:  * Copyright (C) 1999-2001 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, write to the Free Software Foundation, Inc., 51 Franklin Street,
   18:  * Fifth Floor, Boston, MA 02110-1301, USA.
   19:  */
   20: 
   21: /*
   22:  * EUC-CN
   23:  */
   24: 
   25: static int
   26: euc_cn_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, int n)
   27: {
   28:   unsigned char c = *s;
   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 (GB 2312-1980) */
   33:   if (c >= 0xa1 && c < 0xff) {
   34:     if (n < 2)
   35:       return RET_TOOFEW(0);
   36:     {
   37:       unsigned char c2 = s[1];
   38:       if (c2 >= 0xa1 && c2 < 0xff) {
   39:         unsigned char buf[2];
   40:         buf[0] = c-0x80; buf[1] = c2-0x80;
   41:         return gb2312_mbtowc(conv,pwc,buf,2);
   42:       } else
   43:         return RET_ILSEQ;
   44:     }
   45:   }
   46:   return RET_ILSEQ;
   47: }
   48: 
   49: static int
   50: euc_cn_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, int n)
   51: {
   52:   unsigned char buf[2];
   53:   int ret;
   54: 
   55:   /* Code set 0 (ASCII or GB 1988-89) */
   56:   ret = ascii_wctomb(conv,r,wc,n);
   57:   if (ret != RET_ILUNI)
   58:     return ret;
   59: 
   60:   /* Code set 1 (GB 2312-1980) */
   61:   ret = gb2312_wctomb(conv,buf,wc,2);
   62:   if (ret != RET_ILUNI) {
   63:     if (ret != 2) abort();
   64:     if (n < 2)
   65:       return RET_TOOSMALL;
   66:     r[0] = buf[0]+0x80;
   67:     r[1] = buf[1]+0x80;
   68:     return 2;
   69:   }
   70: 
   71:   return RET_ILUNI;
   72: }