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libiconv 1.16

    1: /*
    2:  * Copyright (C) 1999-2001, 2005, 2016 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 <https://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, size_t 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, size_t 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: }