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 * EUC-TW 23 */ 24 25 static int 26 euc_tw_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 if (c >= 0xa1 && c < 0xff) { 34 if (n < 2) 35 return RET_TOOFEW(0); 36 { 37 unsigned char c2 = s[1]; 38 if (c2 >= 0xa1 && c2 < 0xff) { 39 unsigned char buf[2]; 40 buf[0] = c-0x80; buf[1] = c2-0x80; 41 return cns11643_1_mbtowc(conv,pwc,buf,2); 42 } else 43 return RET_ILSEQ; 44 } 45 } 46 /* Code set 2 (CNS 11643-1992 Planes 1-16) */ 47 if (c == 0x8e) { 48 if (n < 4) 49 return RET_TOOFEW(0); 50 { 51 unsigned char c2 = s[1]; 52 if (c2 >= 0xa1 && c2 <= 0xb0) { 53 unsigned char c3 = s[2]; 54 unsigned char c4 = s[3]; 55 if (c3 >= 0xa1 && c3 < 0xff && c4 >= 0xa1 && c4 < 0xff) { 56 unsigned char buf[2]; 57 int ret; 58 buf[0] = c3-0x80; buf[1] = c4-0x80; 59 switch (c2-0xa0) { 60 case 1: ret = cns11643_1_mbtowc(conv,pwc,buf,2); break; 61 case 2: ret = cns11643_2_mbtowc(conv,pwc,buf,2); break; 62 case 3: ret = cns11643_3_mbtowc(conv,pwc,buf,2); break; 63 case 4: ret = cns11643_4_mbtowc(conv,pwc,buf,2); break; 64 case 5: ret = cns11643_5_mbtowc(conv,pwc,buf,2); break; 65 case 6: ret = cns11643_6_mbtowc(conv,pwc,buf,2); break; 66 case 7: ret = cns11643_7_mbtowc(conv,pwc,buf,2); break; 67 case 15: ret = cns11643_15_mbtowc(conv,pwc,buf,2); break; 68 default: return RET_ILSEQ; 69 } 70 if (ret == RET_ILSEQ) 71 return RET_ILSEQ; 72 if (ret != 2) abort(); 73 return 4; 74 } 75 } 76 } 77 } 78 return RET_ILSEQ; 79 } 80 81 static int 82 euc_tw_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, int n) 83 { 84 unsigned char buf[3]; 85 int ret; 86 87 /* Code set 0 (ASCII) */ 88 ret = ascii_wctomb(conv,r,wc,n); 89 if (ret != RET_ILUNI) 90 return ret; 91 92 ret = cns11643_wctomb(conv,buf,wc,3); 93 if (ret != RET_ILUNI) { 94 if (ret != 3) abort(); 95 96 /* Code set 1 (CNS 11643-1992 Plane 1) */ 97 if (buf[0] == 1) { 98 if (n < 2) 99 return RET_TOOSMALL; 100 r[0] = buf[1]+0x80; 101 r[1] = buf[2]+0x80; 102 return 2; 103 } 104 105 /* Code set 2 (CNS 11643-1992 Planes 1-16) */ 106 if (n < 4) 107 return RET_TOOSMALL; 108 r[0] = 0x8e; 109 r[1] = buf[0]+0xa0; 110 r[2] = buf[1]+0x80; 111 r[3] = buf[2]+0x80; 112 return 4; 113 } 114 115 return RET_ILUNI; 116 } 117