characterdatalatin1.java

来自「This is a resource based on j2me embedde」· Java 代码 · 共 318 行

/*
 * @(#)CharacterDataLatin1.java	1.5 06/10/10
 * 
 * Copyright  1990-2008 Sun Microsystems, Inc. All Rights Reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
 * 
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License version
 * 2 only, as published by the Free Software Foundation. 
 * 
 * This program 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 version 2 for more details (a copy is
 * included at /legal/license.txt). 
 * 
 * You should have received a copy of the GNU General Public License
 * version 2 along with this work; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA 
 * 
 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
 * Clara, CA 95054 or visit www.sun.com if you need additional
 * information or have any questions. 
 */

package java.lang;

/** The CharacterData class encapsulates the large tables found in
    Java.lang.Character. */

class CharacterDataLatin1 {

    /* The character properties are currently encoded into 32 bits in the following manner:
        1 bit   mirrored property
        4 bits  directionality property
        9 bits  signed offset used for converting case
        1 bit   if 1, adding the signed offset converts the character to lowercase
        1 bit   if 1, subtracting the signed offset converts the character to uppercase
        1 bit   if 1, this character has a titlecase equivalent (possibly itself)
        3 bits  0  may not be part of an identifier
                1  ignorable control; may continue a Unicode identifier or Java identifier
                2  may continue a Java identifier but not a Unicode identifier (unused)
                3  may continue a Unicode identifier or Java identifier
                4  is a Java whitespace character
                5  may start or continue a Java identifier;
                   may continue but not start a Unicode identifier (underscores)
                6  may start or continue a Java identifier but not a Unicode identifier ($)
                7  may start or continue a Unicode identifier or Java identifier
                Thus:
                   5, 6, 7 may start a Java identifier
                   1, 2, 3, 5, 6, 7 may continue a Java identifier
                   7 may start a Unicode identifier
                   1, 3, 5, 7 may continue a Unicode identifier
                   1 is ignorable within an identifier
                   4 is Java whitespace
        2 bits  0  this character has no numeric property
                1  adding the digit offset to the character code and then
                   masking with 0x1F will produce the desired numeric value
                2  this character has a "strange" numeric value
                3  a Java supradecimal digit: adding the digit offset to the
                   character code, then masking with 0x1F, then adding 10
                   will produce the desired numeric value
        5 bits  digit offset
        5 bits  character type

        The encoding of character properties is subject to change at any time.
     */

    static int getProperties(char ch) {
        return A[ch];
    }

    static int getType(char ch) {
        return getProperties(ch) & 0x1F;
    }

    static boolean isLowerCase(char ch) {
        return getType(ch) == Character.LOWERCASE_LETTER;
    }

    static boolean isUpperCase(char ch) {
        return getType(ch) == Character.UPPERCASE_LETTER;
    }

    static boolean isTitleCase(char ch) {
        return false;
    }

    static boolean isDigit(char ch) {
        return getType(ch) == Character.DECIMAL_DIGIT_NUMBER;
    }

    static boolean isDefined(char ch) {
        return getType(ch) != Character.UNASSIGNED;
    }

    static boolean isLetter(char ch) {
        return (((((1 << Character.UPPERCASE_LETTER) |
            (1 << Character.LOWERCASE_LETTER) |
            (1 << Character.TITLECASE_LETTER) |
            (1 << Character.MODIFIER_LETTER) |
            (1 << Character.OTHER_LETTER)) >> getType(ch)) & 1) != 0);
    }

    static boolean isLetterOrDigit(char ch) {
        return (((((1 << Character.UPPERCASE_LETTER) |
            (1 << Character.LOWERCASE_LETTER) |
            (1 << Character.TITLECASE_LETTER) |
            (1 << Character.MODIFIER_LETTER) |
            (1 << Character.OTHER_LETTER) |
            (1 << Character.DECIMAL_DIGIT_NUMBER)) >> getType(ch)) & 1) != 0);
    }

    static boolean isSpaceChar(char ch) {
        return (((((1 << Character.SPACE_SEPARATOR) |
                   (1 << Character.LINE_SEPARATOR) |
                   (1 << Character.PARAGRAPH_SEPARATOR))
                >> getType(ch)) & 1) != 0);
    }


    static boolean isJavaIdentifierStart(char ch) {
        return (getProperties(ch) & 0x00007000) >= 0x00005000;
    }

    static boolean isJavaIdentifierPart(char ch) {
        return (getProperties(ch) & 0x00003000) != 0;
    }

    static boolean isUnicodeIdentifierStart(char ch) {
        return (getProperties(ch) & 0x00007000) == 0x00007000;
    }

    static boolean isUnicodeIdentifierPart(char ch) {
        return (getProperties(ch)& 0x00001000) != 0;
    }

    static boolean isIdentifierIgnorable(char ch) {
        return (getProperties(ch) & 0x00007000) == 0x00001000;
    }

    static char toLowerCase(char ch) {
        char mapChar = ch;
        int val = getProperties(ch);

        if (((val & 0x00020000) != 0) && 
                ((val & 0x07FC0000) != 0x07FC0000)) { 
            int offset = val << 5 >> (5+18);
            mapChar = (char)(ch + offset);
        }
        return mapChar;
    }

    static char toUpperCase(char ch) {
        char mapChar = ch;
        int val = getProperties(ch);

        if ((val & 0x00010000) != 0) {
            if ((val & 0x07FC0000) != 0x07FC0000) {
                int offset = val  << 5 >> (5+18);
                mapChar =  (char)(ch - offset);
            } else if (ch == '\u00B5') {
                mapChar = '\u039C';
            }
        }
        return mapChar;
    }

    static char toTitleCase(char ch) {
        return toUpperCase(ch);
    }

    static int digit(char ch, int radix) {
        int value = -1;
        if (radix >= Character.MIN_RADIX && radix <= Character.MAX_RADIX) {
            int val = getProperties(ch);
            int kind = val & 0x1F;
            if (kind == Character.DECIMAL_DIGIT_NUMBER) {
                value = ch + ((val & 0x3E0) >> 5) & 0x1F;
            }
            else if ((val & 0xC00) == 0x00000C00) {
                // Java supradecimal digit
                value = (ch + ((val & 0x3E0) >> 5) & 0x1F) + 10;
            }
        }
        return (value < radix) ? value : -1;
    }

    static int getNumericValue(char ch) {
        int val = getProperties(ch);
        int retval = -1;

        switch (val & 0xC00) {
            default: // cannot occur
            case (0x00000000):         // not numeric
                retval = -1;
                break;
            case (0x00000400):              // simple numeric
                retval = ch + ((val & 0x3E0) >> 5) & 0x1F;
                break;
            case (0x00000800)      :       // "strange" numeric
                 retval = -2; 
                 break;
            case (0x00000C00):           // Java supradecimal
                retval = (ch + ((val & 0x3E0) >> 5) & 0x1F) + 10;
                break;
        }
        return retval;
    }

    static boolean isWhitespace(char ch) {
        return (getProperties(ch) & 0x00007000) == 0x00004000;
    }

    static byte getDirectionality(char ch) {
        int val = getProperties(ch);
        byte directionality = (byte)((val & 0x78000000) >> 27);

        if (directionality == 0xF ) {
            directionality = -1;
        }
        return directionality;
    }

    static boolean isMirrored(char ch) {
        return (getProperties(ch) & 0x80000000) != 0;
    }

    static char toUpperCaseEx(char ch) {
        char mapChar = ch;
        int val = getProperties(ch);

        if ((val & 0x00010000) != 0) {
            if ((val & 0x07FC0000) != 0x07FC0000) {
                int offset = val  << 5 >> (5+18);
                mapChar =  (char)(ch - offset);
            }
            else {
                switch(ch) {
                    // map overflow characters
                    case '\u00B5' : mapChar = '\u039C'; break;
                    default       : mapChar = Character.CHAR_ERROR; break;
                }
            }
        }
        return mapChar;
    }

    // The following tables and code generated using:
  // java GenerateCharacter -template /.../CharacterDataLatin1.java.template -spec /.../UnicodeData.txt -specialcasing /.../SpecialCasing.txt -o /.../CharacterDataLatin1.java -string -usecharforbyte -latin1 8
  // The A table has 256 entries for a total of 1024 bytes.

  static final int A[] = new int[256];
/*
**  static final String A_DATA =
**    "\u4800\u100F\u4800\u100F\u4800\u100F\u4800\u100F\u4800\u100F\u4800\u100F\u4800"+
**    "\u100F\u4800\u100F\u4800\u100F\u5800\u400F\u5000\u400F\u5800\u400F\u6000\u400F"+
**    "\u5000\u400F\u4800\u100F\u4800\u100F\u4800\u100F\u4800\u100F\u4800\u100F\u4800"+
**    "\u100F\u4800\u100F\u4800\u100F\u4800\u100F\u4800\u100F\u4800\u100F\u4800\u100F"+
**    "\u4800\u100F\u4800\u100F\u5000\u400F\u5000\u400F\u5000\u400F\u5800\u400F\u6000"+
**    "\u400C\u6800\030\u6800\030\u2800\030\u2800\u601A\u2800\030\u6800\030\u6800"+
**    "\030\uE800\025\uE800\026\u6800\030\u2800\031\u3800\030\u2800\024\u3800\030"+
**    "\u2000\030\u1800\u3609\u1800\u3609\u1800\u3609\u1800\u3609\u1800\u3609\u1800"+
**    "\u3609\u1800\u3609\u1800\u3609\u1800\u3609\u1800\u3609\u3800\030\u6800\030"+
**    "\uE800\031\u6800\031\uE800\031\u6800\030\u6800\030\202\u7FE1\202\u7FE1\202"+
**    "\u7FE1\202\u7FE1\202\u7FE1\202\u7FE1\202\u7FE1\202\u7FE1\202\u7FE1\202\u7FE1"+
**    "\202\u7FE1\202\u7FE1\202\u7FE1\202\u7FE1\202\u7FE1\202\u7FE1\202\u7FE1\202"+
**    "\u7FE1\202\u7FE1\202\u7FE1\202\u7FE1\202\u7FE1\202\u7FE1\202\u7FE1\202\u7FE1"+
**    "\202\u7FE1\uE800\025\u6800\030\uE800\026\u6800\033\u6800\u5017\u6800\033\201"+
**    "\u7FE2\201\u7FE2\201\u7FE2\201\u7FE2\201\u7FE2\201\u7FE2\201\u7FE2\201\u7FE2"+
**    "\201\u7FE2\201\u7FE2\201\u7FE2\201\u7FE2\201\u7FE2\201\u7FE2\201\u7FE2\201"+
**    "\u7FE2\201\u7FE2\201\u7FE2\201\u7FE2\201\u7FE2\201\u7FE2\201\u7FE2\201\u7FE2"+
**    "\201\u7FE2\201\u7FE2\201\u7FE2\uE800\025\u6800\031\uE800\026\u6800\031\u4800"+
**    "\u100F\u4800\u100F\u4800\u100F\u4800\u100F\u4800\u100F\u4800\u100F\u5000\u100F"+
**    "\u4800\u100F\u4800\u100F\u4800\u100F\u4800\u100F\u4800\u100F\u4800\u100F\u4800"+
**    "\u100F\u4800\u100F\u4800\u100F\u4800\u100F\u4800\u100F\u4800\u100F\u4800\u100F"+
**    "\u4800\u100F\u4800\u100F\u4800\u100F\u4800\u100F\u4800\u100F\u4800\u100F\u4800"+
**    "\u100F\u4800\u100F\u4800\u100F\u4800\u100F\u4800\u100F\u4800\u100F\u4800\u100F"+
**    "\u3800\014\u6800\030\u2800\u601A\u2800\u601A\u2800\u601A\u2800\u601A\u6800"+
**    "\034\u6800\034\u6800\033\u6800\034\000\u7002\uE800\035\u6800\031\u6800\024"+
**    "\u6800\034\u6800\033\u2800\034\u2800\031\u1800\u060B\u1800\u060B\u6800\033"+
**    "\u07FD\u7002\u6800\034\u6800\030\u6800\033\u1800\u050B\000\u7002\uE800\036"+
**    "\u6800\u080B\u6800\u080B\u6800\u080B\u6800\030\202\u7001\202\u7001\202\u7001"+
**    "\202\u7001\202\u7001\202\u7001\202\u7001\202\u7001\202\u7001\202\u7001\202"+
**    "\u7001\202\u7001\202\u7001\202\u7001\202\u7001\202\u7001\202\u7001\202\u7001"+
**    "\202\u7001\202\u7001\202\u7001\202\u7001\202\u7001\u6800\031\202\u7001\202"+
**    "\u7001\202\u7001\202\u7001\202\u7001\202\u7001\202\u7001\u07FD\u7002\201\u7002"+
**    "\201\u7002\201\u7002\201\u7002\201\u7002\201\u7002\201\u7002\201\u7002\201"+
**    "\u7002\201\u7002\201\u7002\201\u7002\201\u7002\201\u7002\201\u7002\201\u7002"+
**    "\201\u7002\201\u7002\201\u7002\201\u7002\201\u7002\201\u7002\201\u7002\u6800"+
**    "\031\201\u7002\201\u7002\201\u7002\201\u7002\201\u7002\201\u7002\201\u7002"+
**    "\u061D\u7002";
**/

  // In all, the character property tables require 1024 bytes.

    static {

/*      
**                { // THIS CODE WAS AUTOMATICALLY CREATED BY GenerateCharacter:
**            char[] data = A_DATA.toCharArray();
**            assert (data.length == (256 * 2));
**            int i = 0, j = 0;
**            while (i < (256 * 2)) {
**                int entry = data[i++] << 16;
**                A[j++] = entry | data[i++];
**            }
**        }
*/
        setArrays();

    }        

    static native void setArrays();
}