75 lines
1.5 KiB
C++
75 lines
1.5 KiB
C++
// natCollator.cc - Native code for collation.
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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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// Written by Tom Tromey <tromey@cygnus.com>.
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#include <config.h>
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#include <cni.h>
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#include <jvm.h>
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#include <java/text/Collator.h>
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#include <java/lang/StringBuffer.h>
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#include <java-chardecomp.h>
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void
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java::text::Collator::decomposeCharacter (jchar c,
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java::lang::StringBuffer *buf)
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{
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if (decmp == NO_DECOMPOSITION)
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{
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buf->append(c);
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return;
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}
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struct decomp_entry *base;
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int high;
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if (decmp == FULL_DECOMPOSITION)
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{
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base = full_decomposition;
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high = sizeof (full_decomposition) / sizeof (struct decomp_entry);
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}
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else
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{
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base = canonical_decomposition;
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high = sizeof (canonical_decomposition) / sizeof (struct decomp_entry);
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}
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// FIXME: this is probably a bit slow for the task at hand.
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int i = high / 2;
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int low = 0;
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while (true)
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{
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if (c < base[i].key)
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high = i;
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else if (c > base[i].key)
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low = i;
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else
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break;
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int old = i;
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i = (high + low) / 2;
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if (i == old)
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{
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// Not in table, so it expands to itself.
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buf->append(c);
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return;
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}
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}
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for (int j = 0; base[i].value[j] != '\0'; j += 2)
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{
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jchar x = (base[i].value[j] << 8) | (base[i].value[j + 1]);
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buf->append (x);
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}
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}
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