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	/*
	* Copyright (c) 1999, 2000, Oracle and/or its affiliates. All rights reserved.
	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
	*
	* This code 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. Oracle designates this
	* particular file as subject to the "Classpath" exception as provided
	* by Oracle in the LICENSE file that accompanied this code.
	*
	* This code 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 in the LICENSE file that
	* accompanied this code).
	*
	* 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
	* or visit www.oracle.com if you need additional information or have any
	* questions.
	*/

	package java.util.regex;


	/**
	* Utility class that implements the standard C ctype functionality.
	*
	* @author Hong Zhang
	*/

	final class ASCII {

	static final int UPPER = 0x00000100;

	static final int LOWER = 0x00000200;

	static final int DIGIT = 0x00000400;

	static final int SPACE = 0x00000800;

	static final int PUNCT = 0x00001000;

	static final int CNTRL = 0x00002000;

	static final int BLANK = 0x00004000;

	static final int HEX = 0x00008000;

	static final int UNDER = 0x00010000;

	static final int ASCII = 0x0000FF00;

	static final int ALPHA = (UPPER\|LOWER);

	static final int ALNUM = (UPPER\|LOWER\|DIGIT);

	static final int GRAPH = (PUNCT\|UPPER\|LOWER\|DIGIT);

	static final int WORD = (UPPER\|LOWER\|UNDER\|DIGIT);

	static final int XDIGIT = (HEX);

	private static final int[] ctype = new int[] {
	CNTRL, /* 00 (NUL) */
	CNTRL, /* 01 (SOH) */
	CNTRL, /* 02 (STX) */
	CNTRL, /* 03 (ETX) */
	CNTRL, /* 04 (EOT) */
	CNTRL, /* 05 (ENQ) */
	CNTRL, /* 06 (ACK) */
	CNTRL, /* 07 (BEL) */
	CNTRL, /* 08 (BS) */
	SPACE+CNTRL+BLANK, /* 09 (HT) */
	SPACE+CNTRL, /* 0A (LF) */
	SPACE+CNTRL, /* 0B (VT) */
	SPACE+CNTRL, /* 0C (FF) */
	SPACE+CNTRL, /* 0D (CR) */
	CNTRL, /* 0E (SI) */
	CNTRL, /* 0F (SO) */
	CNTRL, /* 10 (DLE) */
	CNTRL, /* 11 (DC1) */
	CNTRL, /* 12 (DC2) */
	CNTRL, /* 13 (DC3) */
	CNTRL, /* 14 (DC4) */
	CNTRL, /* 15 (NAK) */
	CNTRL, /* 16 (SYN) */
	CNTRL, /* 17 (ETB) */
	CNTRL, /* 18 (CAN) */
	CNTRL, /* 19 (EM) */
	CNTRL, /* 1A (SUB) */
	CNTRL, /* 1B (ESC) */
	CNTRL, /* 1C (FS) */
	CNTRL, /* 1D (GS) */
	CNTRL, /* 1E (RS) */
	CNTRL, /* 1F (US) */
	SPACE+BLANK, /* 20 SPACE */
	PUNCT, /* 21 ! */
	PUNCT, /* 22 " */
	PUNCT, /* 23 # */
	PUNCT, /* 24 $ */
	PUNCT, /* 25 % */
	PUNCT, /* 26 & */
	PUNCT, /* 27 ' */
	PUNCT, /* 28 ( */
	PUNCT, /* 29 ) */
	PUNCT, /* 2A * */
	PUNCT, /* 2B + */
	PUNCT, /* 2C , */
	PUNCT, /* 2D - */
	PUNCT, /* 2E . */
	PUNCT, /* 2F / */
	DIGIT+HEX+0, /* 30 0 */
	DIGIT+HEX+1, /* 31 1 */
	DIGIT+HEX+2, /* 32 2 */
	DIGIT+HEX+3, /* 33 3 */
	DIGIT+HEX+4, /* 34 4 */
	DIGIT+HEX+5, /* 35 5 */
	DIGIT+HEX+6, /* 36 6 */
	DIGIT+HEX+7, /* 37 7 */
	DIGIT+HEX+8, /* 38 8 */
	DIGIT+HEX+9, /* 39 9 */
	PUNCT, /* 3A : */
	PUNCT, /* 3B ; */
	PUNCT, /* 3C < */
	PUNCT, /* 3D = */
	PUNCT, /* 3E > */
	PUNCT, /* 3F ? */
	PUNCT, /* 40 @ */
	UPPER+HEX+10, /* 41 A */
	UPPER+HEX+11, /* 42 B */
	UPPER+HEX+12, /* 43 C */
	UPPER+HEX+13, /* 44 D */
	UPPER+HEX+14, /* 45 E */
	UPPER+HEX+15, /* 46 F */
	UPPER+16, /* 47 G */
	UPPER+17, /* 48 H */
	UPPER+18, /* 49 I */
	UPPER+19, /* 4A J */
	UPPER+20, /* 4B K */
	UPPER+21, /* 4C L */
	UPPER+22, /* 4D M */
	UPPER+23, /* 4E N */
	UPPER+24, /* 4F O */
	UPPER+25, /* 50 P */
	UPPER+26, /* 51 Q */
	UPPER+27, /* 52 R */
	UPPER+28, /* 53 S */
	UPPER+29, /* 54 T */
	UPPER+30, /* 55 U */
	UPPER+31, /* 56 V */
	UPPER+32, /* 57 W */
	UPPER+33, /* 58 X */
	UPPER+34, /* 59 Y */
	UPPER+35, /* 5A Z */
	PUNCT, /* 5B [ */
	PUNCT, /* 5C \ */
	PUNCT, /* 5D ] */
	PUNCT, /* 5E ^ */
	PUNCT\|UNDER, /* 5F _ */
	PUNCT, /* 60 ` */
	LOWER+HEX+10, /* 61 a */
	LOWER+HEX+11, /* 62 b */
	LOWER+HEX+12, /* 63 c */
	LOWER+HEX+13, /* 64 d */
	LOWER+HEX+14, /* 65 e */
	LOWER+HEX+15, /* 66 f */
	LOWER+16, /* 67 g */
	LOWER+17, /* 68 h */
	LOWER+18, /* 69 i */
	LOWER+19, /* 6A j */
	LOWER+20, /* 6B k */
	LOWER+21, /* 6C l */
	LOWER+22, /* 6D m */
	LOWER+23, /* 6E n */
	LOWER+24, /* 6F o */
	LOWER+25, /* 70 p */
	LOWER+26, /* 71 q */
	LOWER+27, /* 72 r */
	LOWER+28, /* 73 s */
	LOWER+29, /* 74 t */
	LOWER+30, /* 75 u */
	LOWER+31, /* 76 v */
	LOWER+32, /* 77 w */
	LOWER+33, /* 78 x */
	LOWER+34, /* 79 y */
	LOWER+35, /* 7A z */
	PUNCT, /* 7B { */
	PUNCT, /* 7C \| */
	PUNCT, /* 7D } */
	PUNCT, /* 7E ~ */
	CNTRL, /* 7F (DEL) */
	};

	static int getType(int ch) {
	return ((ch & 0xFFFFFF80) == 0 ? ctype[ch] : 0);
	}

	static boolean isType(int ch, int type) {
	return (getType(ch) & type) != 0;
	}

	static boolean isAscii(int ch) {
	return ((ch & 0xFFFFFF80) == 0);
	}

	static boolean isAlpha(int ch) {
	return isType(ch, ALPHA);
	}

	static boolean isDigit(int ch) {
	return ((ch-'0')\|('9'-ch)) >= 0;
	}

	static boolean isAlnum(int ch) {
	return isType(ch, ALNUM);
	}

	static boolean isGraph(int ch) {
	return isType(ch, GRAPH);
	}

	static boolean isPrint(int ch) {
	return ((ch-0x20)\|(0x7E-ch)) >= 0;
	}

	static boolean isPunct(int ch) {
	return isType(ch, PUNCT);
	}

	static boolean isSpace(int ch) {
	return isType(ch, SPACE);
	}

	static boolean isHexDigit(int ch) {
	return isType(ch, HEX);
	}

	static boolean isOctDigit(int ch) {
	return ((ch-'0')\|('7'-ch)) >= 0;
	}

	static boolean isCntrl(int ch) {
	return isType(ch, CNTRL);
	}

	static boolean isLower(int ch) {
	return ((ch-'a')\|('z'-ch)) >= 0;
	}

	static boolean isUpper(int ch) {
	return ((ch-'A')\|('Z'-ch)) >= 0;
	}

	static boolean isWord(int ch) {
	return isType(ch, WORD);
	}

	static int toDigit(int ch) {
	return (ctype[ch & 0x7F] & 0x3F);
	}

	static int toLower(int ch) {
	return isUpper(ch) ? (ch + 0x20) : ch;
	}

	static int toUpper(int ch) {
	return isLower(ch) ? (ch - 0x20) : ch;
	}

	}

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