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 } 71