michael@0: /*
michael@0:  *******************************************************************************
michael@0:  *
michael@0:  *   Copyright (C) 1999-2003, International Business Machines
michael@0:  *   Corporation and others.  All Rights Reserved.
michael@0:  *
michael@0:  *******************************************************************************
michael@0:  *   file name:  scrptrun.h
michael@0:  *
michael@0:  *   created on: 10/17/2001
michael@0:  *   created by: Eric R. Mader
michael@0:  */
michael@0: 
michael@0: #ifndef __SCRPTRUN_H
michael@0: #define __SCRPTRUN_H
michael@0: 
michael@0: #include "unicode/utypes.h"
michael@0: #include "unicode/uobject.h"
michael@0: #include "unicode/uscript.h"
michael@0: 
michael@0: struct ScriptRecord
michael@0: {
michael@0:     UChar32 startChar;
michael@0:     UChar32 endChar;
michael@0:     UScriptCode scriptCode;
michael@0: };
michael@0: 
michael@0: struct ParenStackEntry
michael@0: {
michael@0:     int32_t pairIndex;
michael@0:     UScriptCode scriptCode;
michael@0: };
michael@0: 
michael@0: class ScriptRun : public UObject {
michael@0: public:
michael@0:     ScriptRun();
michael@0: 
michael@0:     ScriptRun(const UChar chars[], int32_t length);
michael@0: 
michael@0:     ScriptRun(const UChar chars[], int32_t start, int32_t length);
michael@0: 
michael@0:     void reset();
michael@0: 
michael@0:     void reset(int32_t start, int32_t count);
michael@0: 
michael@0:     void reset(const UChar chars[], int32_t start, int32_t length);
michael@0: 
michael@0:     int32_t getScriptStart();
michael@0: 
michael@0:     int32_t getScriptEnd();
michael@0: 
michael@0:     UScriptCode getScriptCode();
michael@0: 
michael@0:     UBool next();
michael@0: 
michael@0:     /**
michael@0:      * ICU "poor man's RTTI", returns a UClassID for the actual class.
michael@0:      *
michael@0:      * @stable ICU 2.2
michael@0:      */
michael@0:     virtual inline UClassID getDynamicClassID() const { return getStaticClassID(); }
michael@0: 
michael@0:     /**
michael@0:      * ICU "poor man's RTTI", returns a UClassID for this class.
michael@0:      *
michael@0:      * @stable ICU 2.2
michael@0:      */
michael@0:     static inline UClassID getStaticClassID() { return (UClassID)&fgClassID; }
michael@0: 
michael@0: private:
michael@0: 
michael@0:     static UBool sameScript(int32_t scriptOne, int32_t scriptTwo);
michael@0: 
michael@0:     int32_t charStart;
michael@0:     int32_t charLimit;
michael@0:     const UChar *charArray;
michael@0: 
michael@0:     int32_t scriptStart;
michael@0:     int32_t scriptEnd;
michael@0:     UScriptCode scriptCode;
michael@0: 
michael@0:     ParenStackEntry parenStack[128];
michael@0:     int32_t parenSP;
michael@0: 
michael@0:     static int8_t highBit(int32_t value);
michael@0:     static int32_t getPairIndex(UChar32 ch);
michael@0: 
michael@0:     static UChar32 pairedChars[];
michael@0:     static const int32_t pairedCharCount;
michael@0:     static const int32_t pairedCharPower;
michael@0:     static const int32_t pairedCharExtra;
michael@0: 
michael@0:     /**
michael@0:      * The address of this static class variable serves as this class's ID
michael@0:      * for ICU "poor man's RTTI".
michael@0:      */
michael@0:     static const char fgClassID;
michael@0: };
michael@0: 
michael@0: inline ScriptRun::ScriptRun()
michael@0: {
michael@0:     reset(NULL, 0, 0);
michael@0: }
michael@0: 
michael@0: inline ScriptRun::ScriptRun(const UChar chars[], int32_t length)
michael@0: {
michael@0:     reset(chars, 0, length);
michael@0: }
michael@0: 
michael@0: inline ScriptRun::ScriptRun(const UChar chars[], int32_t start, int32_t length)
michael@0: {
michael@0:     reset(chars, start, length);
michael@0: }
michael@0: 
michael@0: inline int32_t ScriptRun::getScriptStart()
michael@0: {
michael@0:     return scriptStart;
michael@0: }
michael@0: 
michael@0: inline int32_t ScriptRun::getScriptEnd()
michael@0: {
michael@0:     return scriptEnd;
michael@0: }
michael@0: 
michael@0: inline UScriptCode ScriptRun::getScriptCode()
michael@0: {
michael@0:     return scriptCode;
michael@0: }
michael@0: 
michael@0: inline void ScriptRun::reset()
michael@0: {
michael@0:     scriptStart = charStart;
michael@0:     scriptEnd   = charStart;
michael@0:     scriptCode  = USCRIPT_INVALID_CODE;
michael@0:     parenSP     = -1;
michael@0: }
michael@0: 
michael@0: inline void ScriptRun::reset(int32_t start, int32_t length)
michael@0: {
michael@0:     charStart = start;
michael@0:     charLimit = start + length;
michael@0: 
michael@0:     reset();
michael@0: }
michael@0: 
michael@0: inline void ScriptRun::reset(const UChar chars[], int32_t start, int32_t length)
michael@0: {
michael@0:     charArray = chars;
michael@0: 
michael@0:     reset(start, length);
michael@0: }
michael@0: 
michael@0: 
michael@0: #endif