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102 lines
2.2 KiB
C++
102 lines
2.2 KiB
C++
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/* Copyright (C) 1999 Cygnus Solutions
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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 <cni.h>
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#include <gnu/gcj/convert/Input_EUCJIS.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_EUCJIS::read(jcharArray outbuffer, jint outpos,
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jint outlength)
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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 >= outlength)
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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 (codeset == 0) // ASCII or JIS-Roman
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{
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if (b < 128)
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{
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#if 0
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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
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{
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if (b == 0x8E) // SS2
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codeset = 2;
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else if (b == 0x8F) // SS3
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codeset = 3;
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else
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{
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codeset = 1;
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first_byte = b;
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}
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}
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}
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else if (codeset == 1) // JIS X 0208:1997
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{
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first_byte -= 0x80 + 33;
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b -= 0x80 + 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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codeset = 0;
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}
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else if (codeset == 2) // Half-width katakana
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{
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if (b >= 0xA1 && b <= 0xDF)
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b += 0xFF61 - 0xA1;
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else
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b = ERROR_CHAR;
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elements(outbuffer)[outpos++] = b;
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codeset = 0;
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}
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else if (codeset == 3) // second byte of JIS X 0212-1990
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{
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first_byte = b;
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codeset = 4;
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}
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else // codeset == 4 // third byte of JIS X 0212-1990
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{
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first_byte -= 0x80 + 34;
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b -= 0x80 + 33;
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if ((unsigned) first_byte >= 76 || (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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codeset = 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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