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236 lines
7.1 KiB
C++
236 lines
7.1 KiB
C++
/* java.lang.Character -- Wrapper class for char, and Unicode subsets
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Copyright (C) 1998, 1999, 2001, 2002, 2007 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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#include <config.h>
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#include <gcj/cni.h>
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#include <jvm.h>
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#include <java/lang/Character.h>
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#include <java-chartables.h>
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// These constants define the return values for characters that are unassigned
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// or reserved for private use.
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#define UNASSIGNED_TYPE 0
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#define UNASSIGNED_DIGIT -1
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#define UNASSIGNED_DIRECTION -1
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#define UNASSIGNED_NUMERIC_VALUE -1
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#define PRIVATE_TYPE 18
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#define PRIVATE_DIRECTION 0
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// The methods that take a char as an argument all have counterparts that
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// take ints. The ones that take chars only work for the BMP or plane 0 of the
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// Unicode standard but the ones that take ints work for all Unicode code
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// points. However, the ones that take chars don't simply redirect the calls
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// because the BMP is by far the most used plane so saving a little time on
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// each call makes sense.
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jchar
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java::lang::Character::readChar(jchar ch)
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{
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// Perform 16-bit addition to find the correct entry in data.
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return data[0][(jchar) (blocks[0][ch >> shift[0]] + ch)];
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}
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jchar
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java::lang::Character::readCodePoint(jint codePoint)
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{
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jint plane = codePoint >> 16;
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jchar offset = (jchar)(codePoint & 0xffff);
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// Be careful not to call this method with an unassigned character. The only
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// characters assigned as of Unicode 4.0.0 belong to planes 0, 1, 2, and 14.
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return data[plane][(jchar) (blocks[plane][offset >> shift[plane]] + offset)];
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}
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jint
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java::lang::Character::getType(jchar ch)
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{
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// Perform 16-bit addition to find the correct entry in data.
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return (jint) (data[0][(jchar) (blocks[0][ch >> shift[0]] + ch)] & TYPE_MASK);
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}
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jint
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java::lang::Character::getType(jint codePoint)
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{
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jint plane = codePoint >> 16;
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if (plane < 0 || (plane > 2 && plane != 14))
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{
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if (plane > 14 && ((codePoint & 0xffff) < 0xfffe))
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return (jint) PRIVATE_TYPE;
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return (jint) UNASSIGNED_TYPE;
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}
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jint offset = codePoint & 0xffff;
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return (jint)
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(data[plane]
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[(jchar) (blocks[plane][offset >> shift[plane]] + offset)] & TYPE_MASK);
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}
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jchar
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java::lang::Character::toLowerCase(jchar ch)
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{
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return (jchar) (ch + lower[0][readChar(ch) >> 7]);
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}
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jint
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java::lang::Character::toLowerCase(jint codePoint)
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{
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jint plane = codePoint >> 16;
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if (plane < 0 || (plane > 2 && plane != 14))
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return codePoint;
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return (lower[plane][readCodePoint(codePoint) >> 7]) + codePoint;
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}
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jchar
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java::lang::Character::toUpperCase(jchar ch)
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{
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return (jchar) (ch + upper[0][readChar(ch) >> 7]);
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}
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jint
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java::lang::Character::toUpperCase(jint codePoint)
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{
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jint plane = codePoint >> 16;
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if (plane < 0 || (plane > 2 && plane != 14))
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return codePoint;
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return (upper[plane][readCodePoint(codePoint) >> 7]) + codePoint;
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}
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jchar
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java::lang::Character::toTitleCase(jchar ch)
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{
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// As title is short, it doesn't hurt to exhaustively iterate over it.
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for (int i = title_length - 2; i >= 0; i -= 2)
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if (title[i] == ch)
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return title[i + 1];
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return toUpperCase(ch);
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}
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jint
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java::lang::Character::toTitleCase(jint codePoint)
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{
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// As of Unicode 4.0.0 no characters outside of plane 0 have titlecase
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// mappings that are different from their uppercase mapping.
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if (codePoint >= 0 && codePoint < 0x10000)
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return toTitleCase((jchar)codePoint);
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return toUpperCase(codePoint);
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}
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jint
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java::lang::Character::digit(jchar ch, jint radix)
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{
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if (radix < MIN_RADIX || radix > MAX_RADIX)
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return (jint) -1;
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jchar attr = readChar(ch);
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if (((1 << (attr & TYPE_MASK))
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& ((1 << UPPERCASE_LETTER)
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| (1 << LOWERCASE_LETTER)
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| (1 << DECIMAL_DIGIT_NUMBER))))
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{
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// Signedness doesn't matter; 0xffff vs. -1 are both rejected.
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jint digit = (jint) numValue[0][attr >> 7];
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return (digit >= 0 && digit < radix) ? digit : (jint) -1;
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}
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return (jint) -1;
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}
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jint
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java::lang::Character::digit(jint codePoint, jint radix)
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{
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if (radix < MIN_RADIX || radix > MAX_RADIX)
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return (jint) -1;
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jint plane = codePoint >> 16;
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if (plane < 0 || (plane > 2 && plane != 14))
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return UNASSIGNED_DIGIT;
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jchar attr = readCodePoint(codePoint);
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if (((1 << (attr & TYPE_MASK))
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& ((1 << UPPERCASE_LETTER)
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| (1 << LOWERCASE_LETTER)
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| (1 << DECIMAL_DIGIT_NUMBER))))
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{
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// Signedness doesn't matter; 0xffff vs. -1 are both rejected.
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jint digit = (jint) numValue[plane][attr >> 7];
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if (digit <= -3)
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digit = largenums[-digit -3];
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return (digit >= 0 && digit < radix) ? digit : (jint) -1;
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}
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return (jint) -1;
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}
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jint
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java::lang::Character::getNumericValue(jchar ch)
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{
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// numValue is stored as an array of jshort, since 10000 is the maximum.
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return (jint) numValue[0][readChar(ch) >> 7];
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}
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jint
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java::lang::Character::getNumericValue(jint codePoint)
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{
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jint plane = codePoint >> 16;
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if (plane < 0 || (plane > 2 && plane != 14))
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return UNASSIGNED_NUMERIC_VALUE;
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jshort num = numValue[plane][readCodePoint(codePoint) >> 7];
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if (num <= -3)
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return largenums[-num - 3];
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return num;
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}
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jbyte
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java::lang::Character::getDirectionality(jchar ch)
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{
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return direction[0][readChar(ch) >> 7];
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}
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jbyte
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java::lang::Character::getDirectionality(jint codePoint)
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{
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jint plane = codePoint >> 16;
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if (plane < 0 || (plane > 2 && plane != 14))
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{
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if (plane > 14 && ((codePoint & 0xffff) < 0xfffe))
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return (jint) PRIVATE_DIRECTION;
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return (jint) UNASSIGNED_DIRECTION;
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}
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return direction[plane][readCodePoint(codePoint) >> 7];
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}
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