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Annotation of embedaddon/libiconv/lib/cp936ext.h, revision 1.1.1.1

1.1       misho       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: }