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	1	// © 2016 and later: Unicode, Inc. and others.
	2	// License & terms of use: http://www.unicode.org/copyright.html
	3	/*
	4	*******************************************************************************
	5	*
	6	* Copyright (C) 1999-2003, International Business Machines
	7	* Corporation and others. All Rights Reserved.
	8	*
	9	*******************************************************************************
	10	* file name: scrptrun.h
	11	*
	12	* created on: 10/17/2001
	13	* created by: Eric R. Mader
	14	*/
	15
	16	#ifndef __SCRPTRUN_H
	17	#define __SCRPTRUN_H
	18
	19	#include "unicode/utypes.h"
	20	#include "unicode/uobject.h"
	21	#include "unicode/uscript.h"
	22
	23	U_NAMESPACE_BEGIN
	24
	25	struct ScriptRecord
	26	{
	27	UChar32 startChar;
	28	UChar32 endChar;
	29	UScriptCode scriptCode;
	30	};
	31
	32	struct ParenStackEntry
	33	{
	34	int32_t pairIndex;
	35	UScriptCode scriptCode;
	36	};
	37
	38	class ScriptRun : public UObject {
	39	public:
	40	ScriptRun();
	41
	42	ScriptRun(const UChar chars[], int32_t length);
	43
	44	ScriptRun(const UChar chars[], int32_t start, int32_t length);
	45
	46	void reset();
	47
	48	void reset(int32_t start, int32_t count);
	49
	50	void reset(const UChar chars[], int32_t start, int32_t length);
	51
	52	int32_t getScriptStart();
	53
	54	int32_t getScriptEnd();
	55
	56	UScriptCode getScriptCode();
	57
	58	UBool next();
	59
	60	/**
	61	* ICU "poor man's RTTI", returns a UClassID for the actual class.
	62	*
	63	* @stable ICU 2.2
	64	*/
	65	virtual inline UClassID getDynamicClassID() const { return getStaticClassID(); }
	66
	67	/**
	68	* ICU "poor man's RTTI", returns a UClassID for this class.
	69	*
	70	* @stable ICU 2.2
	71	*/
	72	static inline UClassID getStaticClassID() { return (UClassID)&fgClassID; }
	73
	74	private:
	75
	76	static UBool sameScript(int32_t scriptOne, int32_t scriptTwo);
	77
	78	int32_t charStart;
	79	int32_t charLimit;
	80	const UChar *charArray;
	81
	82	int32_t scriptStart;
	83	int32_t scriptEnd;
	84	UScriptCode scriptCode;
	85
	86	ParenStackEntry parenStack[128];
	87	int32_t parenSP;
	88
	89	static int8_t highBit(int32_t value);
	90	static int32_t getPairIndex(UChar32 ch);
	91
	92	static UChar32 pairedChars[];
	93	static const int32_t pairedCharCount;
	94	static const int32_t pairedCharPower;
	95	static const int32_t pairedCharExtra;
	96
	97	/**
	98	* The address of this static class variable serves as this class's ID
	99	* for ICU "poor man's RTTI".
	100	*/
	101	static const char fgClassID;
	102	};
	103
	104	inline ScriptRun::ScriptRun()
	105	{
	106	reset(NULL, 0, 0);
	107	}
	108
	109	inline ScriptRun::ScriptRun(const UChar chars[], int32_t length)
	110	{
	111	reset(chars, 0, length);
	112	}
	113
	114	inline ScriptRun::ScriptRun(const UChar chars[], int32_t start, int32_t length)
	115	{
	116	reset(chars, start, length);
	117	}
	118
	119	inline int32_t ScriptRun::getScriptStart()
	120	{
	121	return scriptStart;
	122	}
	123
	124	inline int32_t ScriptRun::getScriptEnd()
	125	{
	126	return scriptEnd;
	127	}
	128
	129	inline UScriptCode ScriptRun::getScriptCode()
	130	{
	131	return scriptCode;
	132	}
	133
	134	inline void ScriptRun::reset()
	135	{
	136	scriptStart = charStart;
	137	scriptEnd = charStart;
	138	scriptCode = USCRIPT_INVALID_CODE;
	139	parenSP = -1;
	140	}
	141
	142	inline void ScriptRun::reset(int32_t start, int32_t length)
	143	{
	144	charStart = start;
	145	charLimit = start + length;
	146
	147	reset();
	148	}
	149
	150	inline void ScriptRun::reset(const UChar chars[], int32_t start, int32_t length)
	151	{
	152	charArray = chars;
	153
	154	reset(start, length);
	155	}
	156
	157	U_NAMESPACE_END
	158
	159	#endif