1 /* 2 * Copyright (C) 2001, 2005 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 * DEC-HANYU 23 */ 24 25 static int 26 dec_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 if (c != 0xc2 || c2 < 0xc2) { 55 unsigned char buf[2]; 56 buf[0] = c-0x80; buf[1] = c2-0x80; 57 return cns11643_1_mbtowc(conv,pwc,buf,2); 58 } 59 } else if (c2 >= 0x21 && c2 < 0x7f) { 60 unsigned char buf[2]; 61 buf[0] = c-0x80; buf[1] = c2; 62 return cns11643_2_mbtowc(conv,pwc,buf,2); 63 } 64 } 65 } 66 return RET_ILSEQ; 67 } 68 69 static int 70 dec_hanyu_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, int n) 71 { 72 unsigned char buf[3]; 73 int ret; 74 75 /* Code set 0 (ASCII) */ 76 ret = ascii_wctomb(conv,r,wc,n); 77 if (ret != RET_ILUNI) 78 return ret; 79 80 ret = cns11643_wctomb(conv,buf,wc,3); 81 if (ret != RET_ILUNI) { 82 if (ret != 3) abort(); 83 84 /* Code set 1 (CNS 11643-1992 Plane 1) */ 85 if (buf[0] == 1 && (buf[1] != 0x42 || buf[2] < 0x42)) { 86 if (n < 2) 87 return RET_TOOSMALL; 88 r[0] = buf[1]+0x80; 89 r[1] = buf[2]+0x80; 90 return 2; 91 } 92 93 /* Code set 2 (CNS 11643-1992 Plane 2) */ 94 if (buf[0] == 2) { 95 if (n < 2) 96 return RET_TOOSMALL; 97 r[0] = buf[1]+0x80; 98 r[1] = buf[2]; 99 return 2; 100 } 101 102 /* Code set 3 (CNS 11643-1992 Plane 3) */ 103 if (buf[0] == 3) { 104 if (n < 4) 105 return RET_TOOSMALL; 106 r[0] = 0xc2; 107 r[1] = 0xcb; 108 r[2] = buf[1]+0x80; 109 r[3] = buf[2]+0x80; 110 return 4; 111 } 112 } 113 114 return RET_ILUNI; 115 } 116