grab from latest android
git-svn-id: http://skia.googlecode.com/svn/trunk@27 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/animator/SkScript2.h b/src/animator/SkScript2.h
new file mode 100644
index 0000000..4d8bd8c
--- /dev/null
+++ b/src/animator/SkScript2.h
@@ -0,0 +1,285 @@
+#ifndef SkScript2_DEFINED
+#define SkScript2_DEFINED
+
+#include "SkOperand2.h"
+#include "SkStream.h"
+#include "SkTDArray.h"
+#include "SkTDArray_Experimental.h"
+#include "SkTDict.h"
+#include "SkTDStack.h"
+
+typedef SkLongArray(SkString*) SkTDStringArray;
+
+class SkAnimateMaker;
+class SkScriptCallBack;
+
+class SkScriptEngine2 {
+public:
+ enum Error {
+ kNoError,
+ kArrayIndexOutOfBounds,
+ kCouldNotFindReferencedID,
+ kFunctionCallFailed,
+ kMemberOpFailed,
+ kPropertyOpFailed
+ };
+
+ enum Attrs {
+ kConstant,
+ kVariable
+ };
+
+ SkScriptEngine2(SkOperand2::OpType returnType);
+ ~SkScriptEngine2();
+ bool convertTo(SkOperand2::OpType , SkScriptValue2* );
+ bool evaluateScript(const char** script, SkScriptValue2* value);
+ void forget(SkOpArray* array);
+ Error getError() { return fError; }
+ SkOperand2::OpType getReturnType() { return fReturnType; }
+ void track(SkOpArray* array) {
+ SkASSERT(fTrackArray.find(array) < 0);
+ *fTrackArray.append() = array; }
+ void track(SkString* string) {
+ SkASSERT(fTrackString.find(string) < 0);
+ *fTrackString.append() = string;
+ }
+ static bool ConvertTo(SkScriptEngine2* , SkOperand2::OpType toType, SkScriptValue2* value);
+ static SkScalar IntToScalar(int32_t );
+ static bool ValueToString(const SkScriptValue2& value, SkString* string);
+
+ enum Op { // used by tokenizer attribute table
+ kUnassigned,
+ kAdd,
+ kBitAnd,
+ kBitNot,
+ kBitOr,
+ kDivide,
+ kEqual,
+ kFlipOps,
+ kGreaterEqual,
+ kLogicalAnd,
+ kLogicalNot,
+ kLogicalOr,
+ kMinus,
+ kModulo,
+ kMultiply,
+ kShiftLeft,
+ kShiftRight, // signed
+ kSubtract,
+ kXor,
+// following not in attribute table
+ kArrayOp,
+ kElse,
+ kIf,
+ kParen,
+ kLastLogicalOp,
+ kArtificialOp = 0x20
+ };
+
+ enum TypeOp { // generated by tokenizer
+ kNop, // should never get generated
+ kAccumulatorPop,
+ kAccumulatorPush,
+ kAddInt,
+ kAddScalar,
+ kAddString, // string concat
+ kArrayIndex,
+ kArrayParam,
+ kArrayToken,
+ kBitAndInt,
+ kBitNotInt,
+ kBitOrInt,
+ kBoxToken,
+ kCallback,
+ kDivideInt,
+ kDivideScalar,
+ kDotOperator,
+ kElseOp,
+ kEnd,
+ kEqualInt,
+ kEqualScalar,
+ kEqualString,
+ kFunctionCall,
+ kFlipOpsOp,
+ kFunctionToken,
+ kGreaterEqualInt,
+ kGreaterEqualScalar,
+ kGreaterEqualString,
+ kIfOp,
+ kIntToScalar,
+ kIntToScalar2,
+ kIntToString,
+ kIntToString2,
+ kIntegerAccumulator,
+ kIntegerOperand,
+ kLogicalAndInt,
+ kLogicalNotInt,
+ kLogicalOrInt,
+ kMemberOp,
+ kMinusInt,
+ kMinusScalar,
+ kModuloInt,
+ kModuloScalar,
+ kMultiplyInt,
+ kMultiplyScalar,
+ kPropertyOp,
+ kScalarAccumulator,
+ kScalarOperand,
+ kScalarToInt,
+ kScalarToInt2,
+ kScalarToString,
+ kScalarToString2,
+ kShiftLeftInt,
+ kShiftRightInt, // signed
+ kStringAccumulator,
+ kStringOperand,
+ kStringToInt,
+ kStringToScalar,
+ kStringToScalar2,
+ kStringTrack,
+ kSubtractInt,
+ kSubtractScalar,
+ kToBool,
+ kUnboxToken,
+ kUnboxToken2,
+ kXorInt,
+ kLastTypeOp
+ };
+
+ enum OpBias {
+ kNoBias,
+ kTowardsNumber = 0,
+ kTowardsString
+ };
+
+protected:
+
+ enum BraceStyle {
+ // kStructBrace,
+ kArrayBrace,
+ kFunctionBrace
+ };
+
+ enum AddTokenRegister {
+ kAccumulator,
+ kOperand
+ };
+
+ enum ResultIsBoolean {
+ kResultIsNotBoolean,
+ kResultIsBoolean
+ };
+
+ struct OperatorAttributes {
+ unsigned int fLeftType : 3; // SkOpType union, but only lower values
+ unsigned int fRightType : 3; // SkOpType union, but only lower values
+ OpBias fBias : 1;
+ ResultIsBoolean fResultIsBoolean : 1;
+ };
+
+ struct Branch {
+ Branch() {
+ }
+
+ Branch(Op op, int depth, unsigned offset) : fOffset(offset), fOpStackDepth(depth), fOperator(op),
+ fPrimed(kIsNotPrimed), fDone(kIsNotDone) {
+ }
+
+ enum Primed {
+ kIsNotPrimed,
+ kIsPrimed
+ };
+
+ enum Done {
+ kIsNotDone,
+ kIsDone,
+ };
+
+ unsigned fOffset : 16; // offset in generated stream where branch needs to go
+ int fOpStackDepth : 7; // depth when operator was found
+ Op fOperator : 6; // operand which generated branch
+ mutable Primed fPrimed : 1; // mark when next instruction generates branch
+ Done fDone : 1; // mark when branch is complete
+ void prime() { fPrimed = kIsPrimed; }
+ void resolve(SkDynamicMemoryWStream* , size_t offset);
+ };
+
+ static const OperatorAttributes gOpAttributes[];
+ static const signed char gPrecedence[];
+ static const TypeOp gTokens[];
+ void addToken(TypeOp );
+ void addTokenConst(SkScriptValue2* , AddTokenRegister , SkOperand2::OpType , TypeOp );
+ void addTokenInt(int );
+ void addTokenScalar(SkScalar );
+ void addTokenString(const SkString& );
+ void addTokenValue(const SkScriptValue2& , AddTokenRegister );
+ int arithmeticOp(char ch, char nextChar, bool lastPush);
+ bool convertParams(SkTDArray<SkScriptValue2>* ,
+ const SkOperand2::OpType* paramTypes, int paramTypeCount);
+ void convertToString(SkOperand2* operand, SkOperand2::OpType type) {
+ SkScriptValue2 scriptValue;
+ scriptValue.fOperand = *operand;
+ scriptValue.fType = type;
+ convertTo(SkOperand2::kString, &scriptValue);
+ *operand = scriptValue.fOperand;
+ }
+ bool evaluateDot(const char*& script);
+ bool evaluateDotParam(const char*& script, const char* field, size_t fieldLength);
+ bool functionParams(const char** scriptPtr, SkTDArray<SkScriptValue2>* params);
+ size_t getTokenOffset();
+ SkOperand2::OpType getUnboxType(SkOperand2 scriptValue);
+ bool handleArrayIndexer(const char** scriptPtr);
+ bool handleFunction(const char** scriptPtr);
+ bool handleMember(const char* field, size_t len, void* object);
+ bool handleMemberFunction(const char* field, size_t len, void* object,
+ SkTDArray<SkScriptValue2>* params);
+ bool handleProperty();
+ bool handleUnbox(SkScriptValue2* scriptValue);
+ bool innerScript(const char** scriptPtr, SkScriptValue2* value);
+ int logicalOp(char ch, char nextChar);
+ void processLogicalOp(Op op);
+ bool processOp();
+ void resolveBranch(Branch& );
+// void setAnimateMaker(SkAnimateMaker* maker) { fMaker = maker; }
+ SkDynamicMemoryWStream fStream;
+ SkDynamicMemoryWStream* fActiveStream;
+ SkTDStack<BraceStyle> fBraceStack; // curly, square, function paren
+ SkTDStack<Branch> fBranchStack; // logical operators, slot to store forward branch
+ SkLongArray(SkScriptCallBack*) fCallBackArray;
+ SkTDStack<Op> fOpStack;
+ SkTDStack<SkScriptValue2> fValueStack;
+// SkAnimateMaker* fMaker;
+ SkLongArray(SkOpArray*) fTrackArray;
+ SkTDStringArray fTrackString;
+ const char* fToken; // one-deep stack
+ size_t fTokenLength;
+ SkOperand2::OpType fReturnType;
+ Error fError;
+ SkOperand2::OpType fAccumulatorType; // tracking for code generation
+ SkBool fBranchPopAllowed;
+ SkBool fConstExpression;
+ SkBool fOperandInUse;
+private:
+#ifdef SK_DEBUG
+public:
+ void decompile(const unsigned char* , size_t );
+ static void UnitTest();
+ static void ValidateDecompileTable();
+#endif
+};
+
+#ifdef SK_DEBUG
+
+struct SkScriptNAnswer2 {
+ const char* fScript;
+ SkOperand2::OpType fType;
+ int32_t fIntAnswer;
+ SkScalar fScalarAnswer;
+ const char* fStringAnswer;
+};
+
+#endif
+
+
+#endif // SkScript2_DEFINED
+