1/* 2 * Copyright (C) 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., 59 Temple Place - 18 * Suite 330, Boston, MA 02111-1307, USA. 19 */ 20 21/* 22 * DEC-HANYU 23 */ 24 25static int 26dec_hanyu_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 (CNS 11643-1992 Plane 1), 33 Code set 2 (CNS 11643-1992 Plane 2), 34 Code set 3 (CNS 11643-1992 Plane 3) */ 35 if (c >= 0xa1 && c < 0xff) { 36 if (n < 2) 37 return RET_TOOFEW(0); 38 { 39 unsigned char c2 = s[1]; 40 if (c == 0xc2 && c2 == 0xcb) { 41 if (n < 4) 42 return RET_TOOFEW(0); 43 if (s[2] >= 0xa1 && s[2] < 0xff && s[3] >= 0xa1 && s[3] < 0xff) { 44 unsigned char buf[2]; 45 int ret; 46 buf[0] = s[2]-0x80; buf[1] = s[3]-0x80; 47 ret = cns11643_3_mbtowc(conv,pwc,buf,2); 48 if (ret != RET_ILSEQ) { 49 if (ret != 2) abort(); 50 return 4; 51 } 52 } 53 } else if (c2 >= 0xa1 && c2 < 0xff) { 54 unsigned char buf[2]; 55 buf[0] = c-0x80; buf[1] = c2-0x80; 56 return cns11643_1_mbtowc(conv,pwc,buf,2); 57 } else if (c2 >= 0x21 && c2 < 0x7f) { 58 unsigned char buf[2]; 59 buf[0] = c-0x80; buf[1] = c2; 60 return cns11643_2_mbtowc(conv,pwc,buf,2); 61 } 62 } 63 } 64 return RET_ILSEQ; 65} 66 67static int 68dec_hanyu_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, int n) 69{ 70 unsigned char buf[3]; 71 int ret; 72 73 /* Code set 0 (ASCII) */ 74 ret = ascii_wctomb(conv,r,wc,n); 75 if (ret != RET_ILUNI) 76 return ret; 77 78 ret = cns11643_wctomb(conv,buf,wc,3); 79 if (ret != RET_ILUNI) { 80 if (ret != 3) abort(); 81 82 /* Code set 1 (CNS 11643-1992 Plane 1) */ 83 if (buf[0] == 1) { 84 if (n < 2) 85 return RET_TOOSMALL; 86 r[0] = buf[1]+0x80; 87 r[1] = buf[2]+0x80; 88 return 2; 89 } 90 91 /* Code set 2 (CNS 11643-1992 Plane 2) */ 92 if (buf[0] == 2) { 93 if (n < 2) 94 return RET_TOOSMALL; 95 r[0] = buf[1]+0x80; 96 r[1] = buf[2]; 97 return 2; 98 } 99 100 /* Code set 3 (CNS 11643-1992 Plane 3) */ 101 if (buf[0] == 3) { 102 if (n < 4) 103 return RET_TOOSMALL; 104 r[0] = 0xc2; 105 r[1] = 0xcb; 106 r[2] = buf[1]+0x80; 107 r[3] = buf[2]+0x80; 108 return 4; 109 } 110 } 111 112 return RET_ILUNI; 113} 114