87 lines
2.9 KiB
C
87 lines
2.9 KiB
C
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/* Routine to translate from Japanese characters to Unicode */
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/* Copyright (c) 2002 Red Hat Incorporated.
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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The name of Red Hat Incorporated may not be used to endorse
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or promote products derived from this software without specific
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prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL RED HAT INCORPORATED BE LIABLE FOR ANY
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DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifdef MB_CAPABLE
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#include <_ansi.h>
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#include <wctype.h>
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#include "local.h"
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#include "jp2uc.h"
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wint_t
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_DEFUN (__jp2uc, (c, type), wint_t c _AND int type)
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{
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int index, adj;
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unsigned char byte1, byte2, adj_byte1, adj_byte2;
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/* we actually use a table of JIS to Unicode. For SJIS, we simply
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note that SJIS is essentially JIS with the top bits on in each
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byte. For EUCJP, we essentially do a translation to JIS before
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accessing the table. */
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switch (type)
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{
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case JP_JIS:
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index = ((c >> 8) - 0x21) * 0xfe + ((c & 0xff) - 0x21);
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break;
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case JP_SJIS:
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index = ((c >> 8) - 0xa1) * 0xfe + ((c & 0xff) - 0xa1);
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break;
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case JP_EUCJP:
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byte1 = c >> 8;
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byte2 = c & 0xff;
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if (byte2 <= 0x7e || (byte2 & 0x1))
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{
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adj = -0x22;
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adj_byte2 = (byte2 & 0xfe) - 31;
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}
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else
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{
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adj = -0x21;
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adj_byte2 = byte2 - (0x7e + 0x21);
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}
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if (byte1 <= 0x9f)
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adj_byte1 = ((byte1 - 112) >> 1) + adj;
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else
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adj_byte1 = ((byte1 - 112) >> 1) + adj;
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index = adj_byte1 * 0xfe + adj_byte2;
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break;
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default:
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return WEOF;
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}
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if (index < 0 || index > (sizeof(jp2uc) / sizeof(unsigned short)))
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return WEOF;
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return (wint_t)jp2uc[index];
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}
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#endif /* MB_CAPABLE */
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