73 lines
1.7 KiB
C++
73 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/Output_SJIS.h>
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extern unsigned short Unicode_to_JIS[];
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extern int trie_lookup (unsigned short *trie, unsigned short key);
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static jint
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convert_TO_SJIS (gnu::gcj::convert::Output_SJIS *encoder,
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jchar *ptr, jint inlength)
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{
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int orig_inlength = inlength;
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jint outbuf_length = encoder->buf->length;
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for (;;)
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{
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if (encoder->count >= outbuf_length)
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break;
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if (encoder->pending >= 0)
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{
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elements(encoder->buf)[encoder->count++] = encoder->pending;
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encoder->pending = -1;
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continue;
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}
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if (inlength == 0)
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break;
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jchar ch = *ptr++;
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inlength--;
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unsigned short val = trie_lookup(Unicode_to_JIS, ch);
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if (val < 0xFF)
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{
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if (val == 0xffff)
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val = '?';
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}
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else
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{
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int b1 = val >> 8;
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int b2 = val & 0xff;
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// From Lunde: "CJKV Informatio Processing", O'Reilly, 1999:
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int rowOffset = b1 < 95 ? 112 : 176;
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int cellOffset = (b1 & 1) != 0 ? (b2 > 95 ? 32 : 31) : 126;
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b1 = ((b1 + 1) >> 1) + rowOffset;
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b2 += cellOffset;
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val = b1;
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encoder->pending = b2;
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}
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elements(encoder->buf)[encoder->count++] = val;
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}
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return orig_inlength - inlength;
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}
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jint
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gnu::gcj::convert::Output_SJIS::write (jcharArray inbuffer,
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jint inpos, jint inlength)
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{
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return convert_TO_SJIS(this, &elements(inbuffer)[inpos], inlength);
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}
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jint
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gnu::gcj::convert::Output_SJIS::write (jstring str, jint inpos,
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jint inlength, jcharArray)
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{
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return convert_TO_SJIS(this, _Jv_GetStringChars(str)+inpos, inlength);
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}
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