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77 lines
1.7 KiB
C++
77 lines
1.7 KiB
C++
/* Copyright (C) 1999 Red Hat, Inc.
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This file is part of libgcj.
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This software is copyrighted work licensed under the terms of the
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Libgcj License. Please consult the file "LIBGCJ_LICENSE" for
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details. */
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#include <config.h>
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#include <gcj/cni.h>
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#include <gnu/gcj/convert/Input_SJIS.h>
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#define ERROR_CHAR 0xFFFD
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extern unsigned short JIS0208_to_Unicode[84][94];
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extern unsigned short JIS0212_to_Unicode[76][94];
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jint
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gnu::gcj::convert::Input_SJIS::read(jcharArray outbuffer, jint outpos,
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jint count)
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{
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jint start_outpos = outpos;
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for (;;)
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{
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if (outpos - start_outpos >= count)
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break;
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if (inpos >= inlength)
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break;
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int b = ((unsigned char*) elements(inbuffer))[inpos++];
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if (first_byte == 0)
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{
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if (b < 128)
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{
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#if 1
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// Technically, we should translate 0x5c to Yen symbol;
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// in practice, it is not clear.
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if (b == 0x5c)
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b = 0x00A5; // Yen sign.
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#endif
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elements(outbuffer)[outpos++] = (char) b;
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}
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else if (b >= 0xA1 && b <= 0xDF)
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{
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b += 0xFF61 - 0xA1;
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elements(outbuffer)[outpos++] = b;
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}
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else
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first_byte = b;
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}
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else
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{
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// From Lunde: "CJKV Informatio Processing", O'Reilly, 1999, p 420:
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bool adjust = b < 159;
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int rowOffset = first_byte < 160 ? 112 : 176;
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int cellOffset = adjust ? (b > 127 ? 32 : 31) : 126;
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first_byte = ((first_byte - rowOffset) << 1) - adjust;
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b -= cellOffset;
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first_byte -= 33;
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b -= 33;
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if ((unsigned) first_byte >= 84 || (unsigned) b >= 94)
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b = ERROR_CHAR;
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else
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{
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b = JIS0208_to_Unicode[first_byte][b];
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if (b == 0)
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b = ERROR_CHAR;
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}
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elements(outbuffer)[outpos++] = b;
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first_byte = 0;
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}
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}
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return outpos - start_outpos;
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}
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