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 * CP936 extensions 23 */ 24 25 static const unsigned short cp936ext_2uni_pagea6[181-159] = { 26 /* 0xa6 */ 27 0xfe35, 28 0xfe36, 0xfe39, 0xfe3a, 0xfe3f, 0xfe40, 0xfe3d, 0xfe3e, 0xfe41, 29 0xfe42, 0xfe43, 0xfe44, 0xfffd, 0xfffd, 0xfe3b, 0xfe3c, 0xfe37, 30 0xfe38, 0xfe31, 0xfffd, 0xfe33, 0xfe34, 31 }; 32 static const unsigned short cp936ext_2uni_pagea8[128-122] = { 33 /* 0xa8 */ 34 0x0251, 0xfffd, 0x0144, 0x0148, 0xfffd, 0x0261, 35 }; 36 37 static int 38 cp936ext_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, int n) 39 { 40 unsigned char c1 = s[0]; 41 if ((c1 == 0xa6) || (c1 == 0xa8)) { 42 if (n >= 2) { 43 unsigned char c2 = s[1]; 44 if ((c2 >= 0x40 && c2 < 0x7f) || (c2 >= 0x80 && c2 < 0xff)) { 45 unsigned int i = 190 * (c1 - 0x81) + (c2 - (c2 >= 0x80 ? 0x41 : 0x40)); 46 unsigned short wc = 0xfffd; 47 if (i < 7410) { 48 if (i >= 7189 && i < 7211) 49 wc = cp936ext_2uni_pagea6[i-7189]; 50 } else { 51 if (i >= 7532 && i < 7538) 52 wc = cp936ext_2uni_pagea8[i-7532]; 53 } 54 if (wc != 0xfffd) { 55 *pwc = (ucs4_t) wc; 56 return 2; 57 } 58 } 59 return RET_ILSEQ; 60 } 61 return RET_TOOFEW(0); 62 } 63 return RET_ILSEQ; 64 } 65 66 static const unsigned short cp936ext_page01[16] = { 67 0x0000, 0x0000, 0x0000, 0x0000, 0xa8bd, 0x0000, 0x0000, 0x0000, /*0x40-0x47*/ 68 0xa8be, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, /*0x48-0x4f*/ 69 }; 70 static const unsigned short cp936ext_page02[24] = { 71 0x0000, 0xa8bb, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, /*0x50-0x57*/ 72 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, /*0x58-0x5f*/ 73 0x0000, 0xa8c0, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, /*0x60-0x67*/ 74 }; 75 static const unsigned short cp936ext_pagefe[24] = { 76 0x0000, 0xa6f2, 0x0000, 0xa6f4, 0xa6f5, 0xa6e0, 0xa6e1, 0xa6f0, /*0x30-0x37*/ 77 0xa6f1, 0xa6e2, 0xa6e3, 0xa6ee, 0xa6ef, 0xa6e6, 0xa6e7, 0xa6e4, /*0x38-0x3f*/ 78 0xa6e5, 0xa6e8, 0xa6e9, 0xa6ea, 0xa6eb, 0x0000, 0x0000, 0x0000, /*0x40-0x47*/ 79 }; 80 81 static int 82 cp936ext_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, int n) 83 { 84 if (n >= 2) { 85 unsigned short c = 0; 86 if (wc >= 0x0140 && wc < 0x0150) 87 c = cp936ext_page01[wc-0x0140]; 88 else if (wc >= 0x0250 && wc < 0x0268) 89 c = cp936ext_page02[wc-0x0250]; 90 else if (wc >= 0xfe30 && wc < 0xfe48) 91 c = cp936ext_pagefe[wc-0xfe30]; 92 if (c != 0) { 93 r[0] = (c >> 8); r[1] = (c & 0xff); 94 return 2; 95 } 96 return RET_ILUNI; 97 } 98 return RET_TOOSMALL; 99 } 100