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libiconv 1.16

    1: /*
    2:  * Copyright (C) 1999-2001, 2016 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, see <https://www.gnu.org/licenses/>.
   18:  */
   19: 
   20: /*
   21:  * CP936 extensions
   22:  */
   23: 
   24: static const unsigned short cp936ext_2uni_pagea6[181-159] = {
   25:   /* 0xa6 */
   26:                                                           0xfe35,
   27:   0xfe36, 0xfe39, 0xfe3a, 0xfe3f, 0xfe40, 0xfe3d, 0xfe3e, 0xfe41,
   28:   0xfe42, 0xfe43, 0xfe44, 0xfffd, 0xfffd, 0xfe3b, 0xfe3c, 0xfe37,
   29:   0xfe38, 0xfe31, 0xfffd, 0xfe33, 0xfe34,
   30: };
   31: static const unsigned short cp936ext_2uni_pagea8[128-122] = {
   32:   /* 0xa8 */
   33:                   0x0251, 0xfffd, 0x0144, 0x0148, 0xfffd, 0x0261,
   34: };
   35: 
   36: static int
   37: cp936ext_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, size_t n)
   38: {
   39:   unsigned char c1 = s[0];
   40:   if ((c1 == 0xa6) || (c1 == 0xa8)) {
   41:     if (n >= 2) {
   42:       unsigned char c2 = s[1];
   43:       if ((c2 >= 0x40 && c2 < 0x7f) || (c2 >= 0x80 && c2 < 0xff)) {
   44:         unsigned int i = 190 * (c1 - 0x81) + (c2 - (c2 >= 0x80 ? 0x41 : 0x40));
   45:         unsigned short wc = 0xfffd;
   46:         if (i < 7410) {
   47:           if (i >= 7189 && i < 7211)
   48:             wc = cp936ext_2uni_pagea6[i-7189];
   49:         } else {
   50:           if (i >= 7532 && i < 7538)
   51:             wc = cp936ext_2uni_pagea8[i-7532];
   52:         }
   53:         if (wc != 0xfffd) {
   54:           *pwc = (ucs4_t) wc;
   55:           return 2;
   56:         }
   57:       }
   58:       return RET_ILSEQ;
   59:     }
   60:     return RET_TOOFEW(0);
   61:   }
   62:   return RET_ILSEQ;
   63: }
   64: 
   65: static const unsigned short cp936ext_page01[16] = {
   66:   0x0000, 0x0000, 0x0000, 0x0000, 0xa8bd, 0x0000, 0x0000, 0x0000, /*0x40-0x47*/
   67:   0xa8be, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, /*0x48-0x4f*/
   68: };
   69: static const unsigned short cp936ext_page02[24] = {
   70:   0x0000, 0xa8bb, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, /*0x50-0x57*/
   71:   0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, /*0x58-0x5f*/
   72:   0x0000, 0xa8c0, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, /*0x60-0x67*/
   73: };
   74: static const unsigned short cp936ext_pagefe[24] = {
   75:   0x0000, 0xa6f2, 0x0000, 0xa6f4, 0xa6f5, 0xa6e0, 0xa6e1, 0xa6f0, /*0x30-0x37*/
   76:   0xa6f1, 0xa6e2, 0xa6e3, 0xa6ee, 0xa6ef, 0xa6e6, 0xa6e7, 0xa6e4, /*0x38-0x3f*/
   77:   0xa6e5, 0xa6e8, 0xa6e9, 0xa6ea, 0xa6eb, 0x0000, 0x0000, 0x0000, /*0x40-0x47*/
   78: };
   79: 
   80: static int
   81: cp936ext_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, size_t n)
   82: {
   83:   if (n >= 2) {
   84:     unsigned short c = 0;
   85:     if (wc >= 0x0140 && wc < 0x0150)
   86:       c = cp936ext_page01[wc-0x0140];
   87:     else if (wc >= 0x0250 && wc < 0x0268)
   88:       c = cp936ext_page02[wc-0x0250];
   89:     else if (wc >= 0xfe30 && wc < 0xfe48)
   90:       c = cp936ext_pagefe[wc-0xfe30];
   91:     if (c != 0) {
   92:       r[0] = (c >> 8); r[1] = (c & 0xff);
   93:       return 2;
   94:     }
   95:     return RET_ILUNI;
   96:   }
   97:   return RET_TOOSMALL;
   98: }