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Annotation of embedaddon/libiconv/lib/ces_big5.h, revision 1.1.1.1

1.1       misho       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:  * BIG-5
                     23:  */
                     24: 
                     25: static int
                     26: ces_big5_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, int n)
                     27: {
                     28:   unsigned char c = *s;
                     29:   /* Code set 0 (ASCII) */
                     30:   if (c < 0x80)
                     31:     return ascii_mbtowc(conv,pwc,s,n);
                     32:   /* Code set 1 (BIG5) */
                     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 >= 0x40 && c2 < 0x7f) || (c2 >= 0xa1 && c2 < 0xff))
                     39:         return big5_mbtowc(conv,pwc,s,2);
                     40:       else
                     41:         return RET_ILSEQ;
                     42:     }
                     43:   }
                     44:   return RET_ILSEQ;
                     45: }
                     46: 
                     47: static int
                     48: ces_big5_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, int n)
                     49: {
                     50:   unsigned char buf[2];
                     51:   int ret;
                     52: 
                     53:   /* Code set 0 (ASCII) */
                     54:   ret = ascii_wctomb(conv,r,wc,n);
                     55:   if (ret != RET_ILUNI)
                     56:     return ret;
                     57: 
                     58:   /* Code set 1 (BIG5) */
                     59:   ret = big5_wctomb(conv,buf,wc,2);
                     60:   if (ret != RET_ILUNI) {
                     61:     if (ret != 2) abort();
                     62:     if (n < 2)
                     63:       return RET_TOOSMALL;
                     64:     r[0] = buf[0];
                     65:     r[1] = buf[1];
                     66:     return 2;
                     67:   }
                     68: 
                     69:   return RET_ILUNI;
                     70: }