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