lib/cp922.h

   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 Lesser General Public
   7  * License as published by the Free Software Foundation; either version 2.1
   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  * Lesser General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Lesser 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  * CP922
  22  */
  23
  24 static const unsigned short cp922_2uni_1[16] = {
  25   /* 0xa0 */
  26   0x00a0, 0x00a1, 0x00a2, 0x00a3, 0x00a4, 0x00a5, 0x00a6, 0x00a7,
  27   0x00a8, 0x00a9, 0x00aa, 0x00ab, 0x00ac, 0x00ad, 0x00ae, 0x203e,
  28 };
  29 static const unsigned short cp922_2uni_2[16] = {
  30   /* 0xd0 */
  31   0x0160, 0x00d1, 0x00d2, 0x00d3, 0x00d4, 0x00d5, 0x00d6, 0x00d7,
  32   0x00d8, 0x00d9, 0x00da, 0x00db, 0x00dc, 0x00dd, 0x017d, 0x00df,
  33 };
  34 static const unsigned short cp922_2uni_3[16] = {
  35   /* 0xf0 */
  36   0x0161, 0x00f1, 0x00f2, 0x00f3, 0x00f4, 0x00f5, 0x00f6, 0x00f7,
  37   0x00f8, 0x00f9, 0x00fa, 0x00fb, 0x00fc, 0x00fd, 0x017e, 0x00ff,
  38 };
  39
  40 static int
  41 cp922_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, size_t n)
  42 {
  43   unsigned char c = *s;
  44   if (c < 0xa0)
  45     *pwc = (ucs4_t) c;
  46   else if (c < 0xb0)
  47     *pwc = (ucs4_t) cp922_2uni_1[c-0xa0];
  48   else if (c < 0xd0)
  49     *pwc = (ucs4_t) c;
  50   else if (c < 0xe0)
  51     *pwc = (ucs4_t) cp922_2uni_2[c-0xd0];
  52   else if (c < 0xf0)
  53     *pwc = (ucs4_t) c;
  54   else
  55     *pwc = (ucs4_t) cp922_2uni_3[c-0xf0];
  56   return 1;
  57 }
  58
  59 static const unsigned char cp922_page00[88] = {
  60   0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0x00, /* 0xa8-0xaf */
  61   0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, /* 0xb0-0xb7 */
  62   0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf, /* 0xb8-0xbf */
  63   0xc0, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7, /* 0xc0-0xc7 */
  64   0xc8, 0xc9, 0xca, 0xcb, 0xcc, 0xcd, 0xce, 0xcf, /* 0xc8-0xcf */
  65   0x00, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, /* 0xd0-0xd7 */
  66   0xd8, 0xd9, 0xda, 0xdb, 0xdc, 0xdd, 0x00, 0xdf, /* 0xd8-0xdf */
  67   0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, /* 0xe0-0xe7 */
  68   0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef, /* 0xe8-0xef */
  69   0x00, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, /* 0xf0-0xf7 */
  70   0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0x00, 0xff, /* 0xf8-0xff */
  71 };
  72 static const unsigned char cp922_page01[32] = {
  73   0xd0, 0xf0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x60-0x67 */
  74   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x68-0x6f */
  75   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x70-0x77 */
  76   0x00, 0x00, 0x00, 0x00, 0x00, 0xde, 0xfe, 0x00, /* 0x78-0x7f */
  77 };
  78
  79 static int
  80 cp922_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, size_t n)
  81 {
  82   unsigned char c = 0;
  83   if (wc < 0x00a8) {
  84     *r = wc;
  85     return 1;
  86   }
  87   else if (wc >= 0x00a8 && wc < 0x0100)
  88     c = cp922_page00[wc-0x00a8];
  89   else if (wc >= 0x0160 && wc < 0x0180)
  90     c = cp922_page01[wc-0x0160];
  91   else if (wc == 0x203e)
  92     c = 0xaf;
  93   if (c != 0) {
  94     *r = c;
  95     return 1;
  96   }
  97   return RET_ILUNI;
  98 }