| |
| /* |
| * Copyright 2011 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| #include "SkScript2.h" |
| #include "SkData.h" |
| #include "SkFloatingPoint.h" |
| #include "SkMath.h" |
| #include "SkParse.h" |
| #include "SkScriptCallBack.h" |
| #include "SkScriptRuntime.h" |
| #include "SkString.h" |
| #include "SkOpArray.h" |
| |
| const SkScriptEngine2::OperatorAttributes SkScriptEngine2::gOpAttributes[] = { |
| { SkOperand2::kNoType, SkOperand2::kNoType, kNoBias, kResultIsNotBoolean }, |
| { SkOperand2::OpType(SkOperand2::kS32 | SkOperand2::kScalar | SkOperand2::kString), |
| SkOperand2::OpType(SkOperand2::kS32 | SkOperand2::kScalar | SkOperand2::kString), kTowardsString, kResultIsNotBoolean }, // kAdd |
| { SkOperand2::kS32, SkOperand2::kS32, kNoBias, kResultIsNotBoolean }, // kBitAnd |
| { SkOperand2::kNoType, SkOperand2::kS32, kNoBias, kResultIsNotBoolean }, // kBitNot |
| { SkOperand2::kS32, SkOperand2::kS32, kNoBias, kResultIsNotBoolean }, // kBitOr |
| { SkOperand2::OpType(SkOperand2::kS32 | SkOperand2::kScalar), |
| SkOperand2::OpType(SkOperand2::kS32 | SkOperand2::kScalar), kNoBias, kResultIsNotBoolean }, // kDivide |
| { SkOperand2::OpType(SkOperand2::kS32 | SkOperand2::kScalar | SkOperand2::kString), |
| SkOperand2::OpType(SkOperand2::kS32 | SkOperand2::kScalar |SkOperand2:: kString), kTowardsNumber, |
| kResultIsBoolean }, // kEqual |
| { SkOperand2::kS32, SkOperand2::kNoType, kNoBias, kResultIsNotBoolean }, // kFlipOps |
| { SkOperand2::OpType(SkOperand2::kS32 | SkOperand2::kScalar | SkOperand2::kString), |
| SkOperand2::OpType(SkOperand2::kS32 | SkOperand2::kScalar | SkOperand2::kString), kTowardsNumber, |
| kResultIsBoolean }, // kGreaterEqual |
| { SkOperand2::kNoType, SkOperand2::kS32, kNoBias, kResultIsNotBoolean }, // kLogicalAnd (really, ToBool) |
| { SkOperand2::kNoType, SkOperand2::kS32, kNoBias, kResultIsNotBoolean }, // kLogicalNot |
| { SkOperand2::kS32, SkOperand2::kS32, kNoBias, kResultIsNotBoolean }, // kLogicalOr |
| { SkOperand2::kNoType, SkOperand2::OpType(SkOperand2::kS32 | SkOperand2::kScalar), kNoBias, kResultIsNotBoolean }, // kMinus |
| { SkOperand2::OpType(SkOperand2::kS32 | SkOperand2::kScalar), |
| SkOperand2::OpType(SkOperand2::kS32 |SkOperand2:: kScalar), kNoBias, kResultIsNotBoolean }, // kModulo |
| { SkOperand2::OpType(SkOperand2::kS32 | SkOperand2::kScalar), |
| SkOperand2::OpType(SkOperand2::kS32 | SkOperand2::kScalar), kNoBias, kResultIsNotBoolean }, // kMultiply |
| { SkOperand2::kS32, SkOperand2::kS32, kNoBias, kResultIsNotBoolean }, // kShiftLeft |
| { SkOperand2::kS32, SkOperand2::kS32, kNoBias, kResultIsNotBoolean }, // kShiftRight |
| { SkOperand2::OpType(SkOperand2::kS32 | SkOperand2::kScalar), |
| SkOperand2::OpType(SkOperand2::kS32 | SkOperand2::kScalar), kNoBias, kResultIsNotBoolean }, // kSubtract |
| { SkOperand2::kS32, SkOperand2::kS32, kNoBias, kResultIsNotBoolean } // kXor |
| }; |
| |
| #define kBracketPrecedence 16 |
| #define kIfElsePrecedence 15 |
| |
| const signed char SkScriptEngine2::gPrecedence[] = { |
| 17, // kUnassigned, |
| 6, // kAdd, |
| 10, // kBitAnd, |
| 4, // kBitNot, |
| 12, // kBitOr, |
| 5, // kDivide, |
| 9, // kEqual, |
| -1, // kFlipOps, |
| 8, // kGreaterEqual, |
| 13, // kLogicalAnd, |
| 4, // kLogicalNot, |
| 14, // kLogicalOr, |
| 4, // kMinus, |
| 5, // kModulo, |
| 5, // kMultiply, |
| 7, // kShiftLeft, |
| 7, // kShiftRight, // signed |
| 6, // kSubtract, |
| 11, // kXor |
| kBracketPrecedence, // kArrayOp |
| kIfElsePrecedence, // kElse |
| kIfElsePrecedence, // kIf |
| kBracketPrecedence, // kParen |
| }; |
| |
| const SkScriptEngine2::TypeOp SkScriptEngine2::gTokens[] = { |
| kNop, // unassigned |
| kAddInt, // kAdd, |
| kBitAndInt, // kBitAnd, |
| kBitNotInt, // kBitNot, |
| kBitOrInt, // kBitOr, |
| kDivideInt, // kDivide, |
| kEqualInt, // kEqual, |
| kFlipOpsOp, // kFlipOps, |
| kGreaterEqualInt, // kGreaterEqual, |
| kLogicalAndInt, // kLogicalAnd, |
| kLogicalNotInt, // kLogicalNot, |
| kLogicalOrInt, // kLogicalOr, |
| kMinusInt, // kMinus, |
| kModuloInt, // kModulo, |
| kMultiplyInt, // kMultiply, |
| kShiftLeftInt, // kShiftLeft, |
| kShiftRightInt, // kShiftRight, // signed |
| kSubtractInt, // kSubtract, |
| kXorInt // kXor |
| }; |
| |
| static inline bool is_between(int c, int min, int max) |
| { |
| return (unsigned)(c - min) <= (unsigned)(max - min); |
| } |
| |
| static inline bool is_ws(int c) |
| { |
| return is_between(c, 1, 32); |
| } |
| |
| static int token_length(const char* start) { |
| char ch = start[0]; |
| if (! is_between(ch, 'a' , 'z') && ! is_between(ch, 'A', 'Z') && ch != '_' && ch != '$') |
| return -1; |
| int length = 0; |
| do |
| ch = start[++length]; |
| while (is_between(ch, 'a' , 'z') || is_between(ch, 'A', 'Z') || is_between(ch, '0', '9') || |
| ch == '_' || ch == '$'); |
| return length; |
| } |
| |
| SkScriptEngine2::SkScriptEngine2(SkOperand2::OpType returnType) : fActiveStream(&fStream), |
| fTokenLength(0), fReturnType(returnType), fError(kNoError), |
| fAccumulatorType(SkOperand2::kNoType), |
| fBranchPopAllowed(true), fConstExpression(true), fOperandInUse(false) |
| { |
| Branch branch(kUnassigned, 0, 0); |
| fBranchStack.push(branch); |
| *fOpStack.push() = (Op) kParen; |
| } |
| |
| SkScriptEngine2::~SkScriptEngine2() { |
| for (SkString** stringPtr = fTrackString.begin(); stringPtr < fTrackString.end(); stringPtr++) |
| delete *stringPtr; |
| for (SkOpArray** arrayPtr = fTrackArray.begin(); arrayPtr < fTrackArray.end(); arrayPtr++) |
| delete *arrayPtr; |
| } |
| |
| void SkScriptEngine2::addToken(SkScriptEngine2::TypeOp op) { |
| int limit = fBranchStack.count() - 1; |
| for (int index = 0; index < limit; index++) { |
| Branch& branch = fBranchStack.index(index); |
| if (branch.fPrimed == Branch::kIsPrimed) |
| resolveBranch(branch); |
| } |
| if (fBranchPopAllowed) { |
| while (fBranchStack.top().fDone == Branch::kIsDone) |
| fBranchStack.pop(); |
| } |
| unsigned char charOp = (unsigned char) op; |
| fActiveStream->write(&charOp, sizeof(charOp)); |
| } |
| |
| void SkScriptEngine2::addTokenConst(SkScriptValue2* value, AddTokenRegister reg, |
| SkOperand2::OpType toType, SkScriptEngine2::TypeOp op) { |
| if (value->fIsConstant == SkScriptValue2::kConstant && convertTo(toType, value)) |
| return; |
| addTokenValue(*value, reg); |
| addToken(op); |
| value->fIsWritten = SkScriptValue2::kWritten; |
| value->fType = toType; |
| } |
| |
| void SkScriptEngine2::addTokenInt(int integer) { |
| fActiveStream->write(&integer, sizeof(integer)); |
| } |
| |
| void SkScriptEngine2::addTokenScalar(SkScalar scalar) { |
| fActiveStream->write(&scalar, sizeof(scalar)); |
| } |
| |
| void SkScriptEngine2::addTokenString(const SkString& string) { |
| int size = SkToInt(string.size()); |
| addTokenInt(size); |
| fActiveStream->write(string.c_str(), size); |
| } |
| |
| void SkScriptEngine2::addTokenValue(const SkScriptValue2& value, AddTokenRegister reg) { |
| if (value.isConstant() == false) { |
| if (reg == kAccumulator) { |
| if (fAccumulatorType == SkOperand2::kNoType) |
| addToken(kAccumulatorPop); |
| } else { |
| ; // !!! incomplete? |
| } |
| return; |
| } |
| if (reg == kAccumulator && fAccumulatorType != SkOperand2::kNoType) |
| addToken(kAccumulatorPush); |
| switch (value.fType) { |
| case SkOperand2::kS32: |
| addToken(reg == kAccumulator ? kIntegerAccumulator : kIntegerOperand); |
| addTokenInt(value.fOperand.fS32); |
| if (reg == kAccumulator) |
| fAccumulatorType = SkOperand2::kS32; |
| else |
| fOperandInUse = true; |
| break; |
| case SkOperand2::kScalar: |
| addToken(reg == kAccumulator ? kScalarAccumulator : kScalarOperand); |
| addTokenScalar(value.fOperand.fScalar); |
| if (reg == kAccumulator) |
| fAccumulatorType = SkOperand2::kScalar; |
| else |
| fOperandInUse = true; |
| break; |
| case SkOperand2::kString: |
| addToken(reg == kAccumulator ? kStringAccumulator : kStringOperand); |
| addTokenString(*value.fOperand.fString); |
| if (reg == kAccumulator) |
| fAccumulatorType = SkOperand2::kString; |
| else |
| fOperandInUse = true; |
| break; |
| default: |
| SkASSERT(0); //!!! not implemented yet |
| } |
| } |
| |
| int SkScriptEngine2::arithmeticOp(char ch, char nextChar, bool lastPush) { |
| Op op = kUnassigned; |
| bool reverseOperands = false; |
| bool negateResult = false; |
| int advance = 1; |
| switch (ch) { |
| case '+': |
| // !!! ignoring unary plus as implemented here has the side effect of |
| // suppressing errors like +"hi" |
| if (lastPush == false) // unary plus, don't push an operator |
| return advance; |
| op = kAdd; |
| break; |
| case '-': |
| op = lastPush ? kSubtract : kMinus; |
| break; |
| case '*': |
| op = kMultiply; |
| break; |
| case '/': |
| op = kDivide; |
| break; |
| case '>': |
| if (nextChar == '>') { |
| op = kShiftRight; |
| goto twoChar; |
| } |
| op = kGreaterEqual; |
| if (nextChar == '=') |
| goto twoChar; |
| reverseOperands = negateResult = true; |
| break; |
| case '<': |
| if (nextChar == '<') { |
| op = kShiftLeft; |
| goto twoChar; |
| } |
| op = kGreaterEqual; |
| reverseOperands = nextChar == '='; |
| negateResult = ! reverseOperands; |
| advance += reverseOperands; |
| break; |
| case '=': |
| if (nextChar == '=') { |
| op = kEqual; |
| goto twoChar; |
| } |
| break; |
| case '!': |
| if (nextChar == '=') { |
| op = kEqual; |
| negateResult = true; |
| twoChar: |
| advance++; |
| break; |
| } |
| op = kLogicalNot; |
| break; |
| case '?': |
| op =(Op) kIf; |
| break; |
| case ':': |
| op = (Op) kElse; |
| break; |
| case '^': |
| op = kXor; |
| break; |
| case '(': |
| *fOpStack.push() = (Op) kParen; |
| return advance; |
| case '&': |
| SkASSERT(nextChar != '&'); |
| op = kBitAnd; |
| break; |
| case '|': |
| SkASSERT(nextChar != '|'); |
| op = kBitOr; |
| break; |
| case '%': |
| op = kModulo; |
| break; |
| case '~': |
| op = kBitNot; |
| break; |
| } |
| if (op == kUnassigned) |
| return 0; |
| signed char precedence = gPrecedence[op]; |
| do { |
| int idx = 0; |
| Op compare; |
| do { |
| compare = fOpStack.index(idx); |
| if ((compare & kArtificialOp) == 0) |
| break; |
| idx++; |
| } while (true); |
| signed char topPrecedence = gPrecedence[compare]; |
| SkASSERT(topPrecedence != -1); |
| if (topPrecedence > precedence || (topPrecedence == precedence && |
| gOpAttributes[op].fLeftType == SkOperand2::kNoType)) { |
| break; |
| } |
| processOp(); |
| } while (true); |
| if (negateResult) |
| *fOpStack.push() = (Op) (kLogicalNot | kArtificialOp); |
| fOpStack.push(op); |
| if (reverseOperands) |
| *fOpStack.push() = (Op) (kFlipOps | kArtificialOp); |
| |
| return advance; |
| } |
| |
| bool SkScriptEngine2::convertParams(SkTDArray<SkScriptValue2>* params, |
| const SkOperand2::OpType* paramTypes, int paramCount) { |
| int count = params->count(); |
| if (count > paramCount) { |
| SkASSERT(0); |
| return false; // too many parameters passed |
| } |
| for (int index = 0; index < count; index++) |
| convertTo(paramTypes[index], &(*params)[index]); |
| return true; |
| } |
| |
| bool SkScriptEngine2::convertTo(SkOperand2::OpType toType, SkScriptValue2* value ) { |
| SkOperand2::OpType type = value->fType; |
| if (type == toType) |
| return true; |
| if (type == SkOperand2::kObject) { |
| if (handleUnbox(value) == false) |
| return false; |
| return convertTo(toType, value); |
| } |
| return ConvertTo(this, toType, value); |
| } |
| |
| bool SkScriptEngine2::evaluateDot(const char*& script) { |
| size_t fieldLength = token_length(++script); // skip dot |
| SkASSERT(fieldLength > 0); // !!! add error handling |
| const char* field = script; |
| script += fieldLength; |
| bool success = handleProperty(); |
| if (success == false) { |
| fError = kCouldNotFindReferencedID; |
| goto error; |
| } |
| return evaluateDotParam(script, field, fieldLength); |
| error: |
| return false; |
| } |
| |
| bool SkScriptEngine2::evaluateDotParam(const char*& script, const char* field, size_t fieldLength) { |
| SkScriptValue2& top = fValueStack.top(); |
| if (top.fType != SkOperand2::kObject) |
| return false; |
| void* object = top.fOperand.fObject; |
| fValueStack.pop(); |
| char ch; // see if it is a simple member or a function |
| while (is_ws(ch = script[0])) |
| script++; |
| bool success = true; |
| if (ch != '(') |
| success = handleMember(field, fieldLength, object); |
| else { |
| SkTDArray<SkScriptValue2> params; |
| *fBraceStack.push() = kFunctionBrace; |
| success = functionParams(&script, ¶ms); |
| if (success) |
| success = handleMemberFunction(field, fieldLength, object, ¶ms); |
| } |
| return success; |
| } |
| |
| bool SkScriptEngine2::evaluateScript(const char** scriptPtr, SkScriptValue2* value) { |
| // fArrayOffset = 0; // no support for structures for now |
| bool success; |
| const char* inner; |
| if (strncmp(*scriptPtr, "#script:", sizeof("#script:") - 1) == 0) { |
| *scriptPtr += sizeof("#script:") - 1; |
| if (fReturnType == SkOperand2::kNoType || fReturnType == SkOperand2::kString) { |
| success = innerScript(scriptPtr, value); |
| SkASSERT(success); |
| inner = value->fOperand.fString->c_str(); |
| scriptPtr = &inner; |
| } |
| } |
| success = innerScript(scriptPtr, value); |
| const char* script = *scriptPtr; |
| char ch; |
| while (is_ws(ch = script[0])) |
| script++; |
| if (ch != '\0') { |
| // error may trigger on scripts like "50,0" that were intended to be written as "[50, 0]" |
| return false; |
| } |
| return success; |
| } |
| |
| void SkScriptEngine2::forget(SkOpArray* array) { |
| if (array->getType() == SkOperand2::kString) { |
| for (int index = 0; index < array->count(); index++) { |
| SkString* string = (*array)[index].fString; |
| int found = fTrackString.find(string); |
| if (found >= 0) |
| fTrackString.remove(found); |
| } |
| return; |
| } |
| if (array->getType() == SkOperand2::kArray) { |
| for (int index = 0; index < array->count(); index++) { |
| SkOpArray* child = (*array)[index].fArray; |
| forget(child); // forgets children of child |
| int found = fTrackArray.find(child); |
| if (found >= 0) |
| fTrackArray.remove(found); |
| } |
| } |
| } |
| |
| bool SkScriptEngine2::functionParams(const char** scriptPtr, SkTDArray<SkScriptValue2>* params) { |
| (*scriptPtr)++; // skip open paren |
| *fOpStack.push() = (Op) kParen; |
| *fBraceStack.push() = kFunctionBrace; |
| do { |
| SkScriptValue2 value; |
| bool success = innerScript(scriptPtr, &value); |
| SkASSERT(success); |
| if (success == false) |
| return false; |
| *params->append() = value; |
| } while ((*scriptPtr)[-1] == ','); |
| fBraceStack.pop(); |
| fOpStack.pop(); // pop paren |
| (*scriptPtr)++; // advance beyond close paren |
| return true; |
| } |
| |
| size_t SkScriptEngine2::getTokenOffset() { |
| return fActiveStream->getOffset(); |
| } |
| |
| SkOperand2::OpType SkScriptEngine2::getUnboxType(SkOperand2 scriptValue) { |
| for (SkScriptCallBack** callBack = fCallBackArray.begin(); callBack < fCallBackArray.end(); callBack++) { |
| if ((*callBack)->getType() != SkScriptCallBack::kUnbox) |
| continue; |
| return (*callBack)->getReturnType(0, &scriptValue); |
| } |
| return SkOperand2::kObject; |
| } |
| |
| bool SkScriptEngine2::innerScript(const char** scriptPtr, SkScriptValue2* value) { |
| const char* script = *scriptPtr; |
| char ch; |
| bool lastPush = false; |
| bool success = true; |
| int opBalance = fOpStack.count(); |
| int baseBrace = fBraceStack.count(); |
| int branchBalance = fBranchStack.count(); |
| while ((ch = script[0]) != '\0') { |
| if (is_ws(ch)) { |
| script++; |
| continue; |
| } |
| SkScriptValue2 operand; |
| const char* dotCheck; |
| if (fBraceStack.count() > baseBrace) { |
| if (fBraceStack.top() == kArrayBrace) { |
| SkScriptValue2 tokenValue; |
| success = innerScript(&script, &tokenValue); // terminate and return on comma, close brace |
| SkASSERT(success); |
| { |
| SkOperand2::OpType type = fReturnType; |
| if (fReturnType == SkOperand2::kNoType) { |
| // !!! short sighted; in the future, allow each returned array component to carry |
| // its own type, and let caller do any needed conversions |
| if (value->fOperand.fArray->count() == 0) |
| value->fOperand.fArray->setType(type = tokenValue.fType); |
| else |
| type = value->fOperand.fArray->getType(); |
| } |
| if (tokenValue.fType != type) |
| convertTo(type, &tokenValue); |
| *value->fOperand.fArray->append() = tokenValue.fOperand; |
| } |
| lastPush = false; |
| continue; |
| } else { |
| SkASSERT(token_length(script) > 0); |
| } |
| } |
| if (lastPush != false && fTokenLength > 0) { |
| if (ch == '(') { |
| *fBraceStack.push() = kFunctionBrace; |
| SkString functionName(fToken, fTokenLength); |
| |
| if (handleFunction(&script) == false) |
| return false; |
| lastPush = true; |
| continue; |
| } else if (ch == '[') { |
| if (handleProperty() == false) { |
| SkASSERT(0); |
| return false; |
| } |
| if (handleArrayIndexer(&script) == false) |
| return false; |
| lastPush = true; |
| continue; |
| } else if (ch != '.') { |
| if (handleProperty() == false) { |
| SkASSERT(0); |
| return false; |
| } |
| lastPush = true; |
| continue; |
| } |
| } |
| if (ch == '0' && (script[1] & ~0x20) == 'X') { |
| SkASSERT(lastPush == false); |
| script += 2; |
| script = SkParse::FindHex(script, (uint32_t*) &operand.fOperand.fS32); |
| SkASSERT(script); |
| goto intCommon; |
| } |
| if (lastPush == false && ch == '.') |
| goto scalarCommon; |
| if (ch >= '0' && ch <= '9') { |
| SkASSERT(lastPush == false); |
| dotCheck = SkParse::FindS32(script, &operand.fOperand.fS32); |
| if (dotCheck[0] != '.') { |
| script = dotCheck; |
| intCommon: |
| operand.fType = SkOperand2::kS32; |
| } else { |
| scalarCommon: |
| script = SkParse::FindScalar(script, &operand.fOperand.fScalar); |
| operand.fType = SkOperand2::kScalar; |
| } |
| operand.fIsConstant = SkScriptValue2::kConstant; |
| fValueStack.push(operand); |
| lastPush = true; |
| continue; |
| } |
| int length = token_length(script); |
| if (length > 0) { |
| SkASSERT(lastPush == false); |
| fToken = script; |
| fTokenLength = length; |
| script += length; |
| lastPush = true; |
| continue; |
| } |
| char startQuote = ch; |
| if (startQuote == '\'' || startQuote == '\"') { |
| SkASSERT(lastPush == false); |
| operand.fOperand.fString = new SkString(); |
| ++script; |
| const char* stringStart = script; |
| do { // measure string |
| if (script[0] == '\\') |
| ++script; |
| ++script; |
| SkASSERT(script[0]); // !!! throw an error |
| } while (script[0] != startQuote); |
| operand.fOperand.fString->set(stringStart, script - stringStart); |
| script = stringStart; |
| char* stringWrite = operand.fOperand.fString->writable_str(); |
| do { // copy string |
| if (script[0] == '\\') |
| ++script; |
| *stringWrite++ = script[0]; |
| ++script; |
| SkASSERT(script[0]); // !!! throw an error |
| } while (script[0] != startQuote); |
| ++script; |
| track(operand.fOperand.fString); |
| operand.fType = SkOperand2::kString; |
| operand.fIsConstant = SkScriptValue2::kConstant; |
| fValueStack.push(operand); |
| lastPush = true; |
| continue; |
| } |
| if (ch == '.') { |
| if (fTokenLength == 0) { |
| int tokenLength = token_length(++script); |
| const char* token = script; |
| script += tokenLength; |
| SkASSERT(fValueStack.count() > 0); // !!! add error handling |
| SkScriptValue2 top; |
| fValueStack.pop(&top); |
| |
| addTokenInt(top.fType); |
| addToken(kBoxToken); |
| top.fType = SkOperand2::kObject; |
| top.fIsConstant = SkScriptValue2::kVariable; |
| fConstExpression = false; |
| fValueStack.push(top); |
| success = evaluateDotParam(script, token, tokenLength); |
| SkASSERT(success); |
| lastPush = true; |
| continue; |
| } |
| // get next token, and evaluate immediately |
| success = evaluateDot(script); |
| if (success == false) { |
| // SkASSERT(0); |
| return false; |
| } |
| lastPush = true; |
| continue; |
| } |
| if (ch == '[') { |
| if (lastPush == false) { |
| script++; |
| *fBraceStack.push() = kArrayBrace; |
| operand.fOperand.fArray = value->fOperand.fArray = new SkOpArray(fReturnType); |
| track(value->fOperand.fArray); |
| |
| operand.fType = SkOperand2::kArray; |
| operand.fIsConstant = SkScriptValue2::kVariable; |
| fValueStack.push(operand); |
| continue; |
| } |
| if (handleArrayIndexer(&script) == false) |
| return false; |
| lastPush = true; |
| continue; |
| } |
| #if 0 // structs not supported for now |
| if (ch == '{') { |
| if (lastPush == false) { |
| script++; |
| *fBraceStack.push() = kStructBrace; |
| operand.fS32 = 0; |
| *fTypeStack.push() = (SkOpType) kStruct; |
| fOperandStack.push(operand); |
| continue; |
| } |
| SkASSERT(0); // braces in other contexts aren't supported yet |
| } |
| #endif |
| if (ch == ')' && fBraceStack.count() > 0) { |
| BraceStyle braceStyle = fBraceStack.top(); |
| if (braceStyle == kFunctionBrace) { |
| fBraceStack.pop(); |
| break; |
| } |
| } |
| if (ch == ',' || ch == ']') { |
| if (ch != ',') { |
| BraceStyle match; |
| fBraceStack.pop(&match); |
| SkASSERT(match == kArrayBrace); |
| } |
| script++; |
| // !!! see if brace or bracket is correct closer |
| break; |
| } |
| char nextChar = script[1]; |
| int advance = logicalOp(ch, nextChar); |
| if (advance == 0) |
| advance = arithmeticOp(ch, nextChar, lastPush); |
| if (advance == 0) // unknown token |
| return false; |
| if (advance > 0) |
| script += advance; |
| lastPush = ch == ']' || ch == ')'; |
| } |
| if (fTokenLength > 0) { |
| success = handleProperty(); |
| SkASSERT(success); |
| } |
| int branchIndex = 0; |
| branchBalance = fBranchStack.count() - branchBalance; |
| fBranchPopAllowed = false; |
| while (branchIndex < branchBalance) { |
| Branch& branch = fBranchStack.index(branchIndex++); |
| if (branch.fPrimed == Branch::kIsPrimed) |
| break; |
| Op branchOp = branch.fOperator; |
| SkOperand2::OpType lastType = fValueStack.top().fType; |
| addTokenValue(fValueStack.top(), kAccumulator); |
| fValueStack.pop(); |
| if (branchOp == kLogicalAnd || branchOp == kLogicalOr) { |
| if (branch.fOperator == kLogicalAnd) |
| branch.prime(); |
| addToken(kToBool); |
| } else { |
| resolveBranch(branch); |
| SkScriptValue2 operand; |
| operand.fType = lastType; |
| // !!! note that many branching expressions could be constant |
| // today, we always evaluate branches as returning variables |
| operand.fIsConstant = SkScriptValue2::kVariable; |
| fValueStack.push(operand); |
| } |
| if (branch.fDone == Branch::kIsNotDone) |
| branch.prime(); |
| } |
| fBranchPopAllowed = true; |
| while (fBranchStack.top().fDone == Branch::kIsDone) |
| fBranchStack.pop(); |
| while (fOpStack.count() > opBalance) { // leave open paren |
| if (processOp() == false) |
| return false; |
| } |
| SkOperand2::OpType topType = fValueStack.count() > 0 ? fValueStack.top().fType : SkOperand2::kNoType; |
| if (topType != fReturnType && |
| topType == SkOperand2::kString && fReturnType != SkOperand2::kNoType) { // if result is a string, give handle property a chance to convert it to the property value |
| SkString* string = fValueStack.top().fOperand.fString; |
| fToken = string->c_str(); |
| fTokenLength = string->size(); |
| fValueStack.pop(); |
| success = handleProperty(); |
| if (success == false) { // if it couldn't convert, return string (error?) |
| SkScriptValue2 operand; |
| operand.fType = SkOperand2::kString; |
| operand.fOperand.fString = string; |
| operand.fIsConstant = SkScriptValue2::kVariable; // !!! ? |
| fValueStack.push(operand); |
| } |
| } |
| if (fStream.getOffset() > 0) { |
| addToken(kEnd); |
| SkAutoDataUnref data(fStream.copyToData()); |
| #ifdef SK_DEBUG |
| decompile(data->bytes(), data->size()); |
| #endif |
| SkScriptRuntime runtime(fCallBackArray); |
| runtime.executeTokens((unsigned char*) data->bytes()); |
| SkScriptValue2 value1; |
| runtime.getResult(&value1.fOperand); |
| value1.fType = fReturnType; |
| fValueStack.push(value1); |
| } |
| if (value) { |
| if (fValueStack.count() == 0) |
| return false; |
| fValueStack.pop(value); |
| if (value->fType != fReturnType && value->fType == SkOperand2::kObject && |
| fReturnType != SkOperand2::kNoType) |
| convertTo(fReturnType, value); |
| } |
| // if (fBranchStack.top().fOpStackDepth > fOpStack.count()) |
| // resolveBranch(); |
| *scriptPtr = script; |
| return true; // no error |
| } |
| |
| bool SkScriptEngine2::handleArrayIndexer(const char** scriptPtr) { |
| SkScriptValue2 scriptValue; |
| (*scriptPtr)++; |
| *fOpStack.push() = (Op) kParen; |
| *fBraceStack.push() = kArrayBrace; |
| SkOperand2::OpType saveType = fReturnType; |
| fReturnType = SkOperand2::kS32; |
| bool success = innerScript(scriptPtr, &scriptValue); |
| fReturnType = saveType; |
| SkASSERT(success); |
| success = convertTo(SkOperand2::kS32, &scriptValue); |
| SkASSERT(success); |
| int index = scriptValue.fOperand.fS32; |
| fValueStack.pop(&scriptValue); |
| if (scriptValue.fType == SkOperand2::kObject) { |
| success = handleUnbox(&scriptValue); |
| SkASSERT(success); |
| SkASSERT(scriptValue.fType == SkOperand2::kArray); |
| } |
| scriptValue.fType = scriptValue.fOperand.fArray->getType(); |
| // SkASSERT(index >= 0); |
| if ((unsigned) index >= (unsigned) scriptValue.fOperand.fArray->count()) { |
| fError = kArrayIndexOutOfBounds; |
| return false; |
| } |
| scriptValue.fOperand = scriptValue.fOperand.fArray->begin()[index]; |
| scriptValue.fIsConstant = SkScriptValue2::kVariable; |
| fValueStack.push(scriptValue); |
| fOpStack.pop(); // pop paren |
| return success; |
| } |
| |
| bool SkScriptEngine2::handleFunction(const char** scriptPtr) { |
| const char* functionName = fToken; |
| size_t functionNameLen = fTokenLength; |
| fTokenLength = 0; |
| SkTDArray<SkScriptValue2> params; |
| bool success = functionParams(scriptPtr, ¶ms); |
| if (success == false) |
| goto done; |
| { |
| for (SkScriptCallBack** callBack = fCallBackArray.begin(); callBack < fCallBackArray.end(); callBack++) { |
| if ((*callBack)->getType() != SkScriptCallBack::kFunction) |
| continue; |
| SkScriptValue2 callbackResult; |
| success = (*callBack)->getReference(functionName, functionNameLen, &callbackResult); |
| if (success) { |
| callbackResult.fType = (*callBack)->getReturnType(callbackResult.fOperand.fReference, NULL); |
| callbackResult.fIsConstant = SkScriptValue2::kVariable; |
| fValueStack.push(callbackResult); |
| goto done; |
| } |
| } |
| } |
| return false; |
| done: |
| fOpStack.pop(); |
| return success; |
| } |
| |
| bool SkScriptEngine2::handleMember(const char* field, size_t len, void* object) { |
| bool success = true; |
| for (SkScriptCallBack** callBack = fCallBackArray.begin(); callBack < fCallBackArray.end(); callBack++) { |
| if ((*callBack)->getType() != SkScriptCallBack::kMember) |
| continue; |
| SkScriptValue2 callbackResult; |
| success = (*callBack)->getReference(field, len, &callbackResult); |
| if (success) { |
| if (callbackResult.fType == SkOperand2::kString) |
| track(callbackResult.fOperand.fString); |
| callbackResult.fIsConstant = SkScriptValue2::kVariable; |
| fValueStack.push(callbackResult); |
| goto done; |
| } |
| } |
| return false; |
| done: |
| return success; |
| } |
| |
| bool SkScriptEngine2::handleMemberFunction(const char* field, size_t len, void* object, |
| SkTDArray<SkScriptValue2>* params) { |
| bool success = true; |
| for (SkScriptCallBack** callBack = fCallBackArray.begin(); callBack < fCallBackArray.end(); callBack++) { |
| if ((*callBack)->getType() != SkScriptCallBack::kMemberFunction) |
| continue; |
| SkScriptValue2 callbackResult; |
| success = (*callBack)->getReference(field, len, &callbackResult); |
| if (success) { |
| if (callbackResult.fType == SkOperand2::kString) |
| track(callbackResult.fOperand.fString); |
| callbackResult.fIsConstant = SkScriptValue2::kVariable; |
| fValueStack.push(callbackResult); |
| goto done; |
| } |
| } |
| return false; |
| done: |
| return success; |
| } |
| |
| bool SkScriptEngine2::handleProperty() { |
| bool success = true; |
| for (SkScriptCallBack** callBack = fCallBackArray.begin(); callBack < fCallBackArray.end(); callBack++) { |
| if ((*callBack)->getType() != SkScriptCallBack::kProperty) |
| continue; |
| SkScriptValue2 callbackResult; |
| success = (*callBack)->getReference(fToken, fTokenLength, &callbackResult); |
| if (success) { |
| if (callbackResult.fType == SkOperand2::kString && callbackResult.fOperand.fString == NULL) { |
| callbackResult.fOperand.fString = new SkString(fToken, fTokenLength); |
| track(callbackResult.fOperand.fString); |
| } |
| callbackResult.fIsConstant = SkScriptValue2::kVariable; |
| fValueStack.push(callbackResult); |
| goto done; |
| } |
| } |
| done: |
| fTokenLength = 0; |
| return success; |
| } |
| |
| bool SkScriptEngine2::handleUnbox(SkScriptValue2* scriptValue) { |
| bool success = true; |
| for (SkScriptCallBack** callBack = fCallBackArray.begin(); callBack < fCallBackArray.end(); callBack++) { |
| if ((*callBack)->getType() != SkScriptCallBack::kUnbox) |
| continue; |
| SkScriptCallBackConvert* callBackConvert = (SkScriptCallBackConvert*) *callBack; |
| success = callBackConvert->convert(scriptValue->fType, &scriptValue->fOperand); |
| if (success) { |
| if (scriptValue->fType == SkOperand2::kString) |
| track(scriptValue->fOperand.fString); |
| goto done; |
| } |
| } |
| return false; |
| done: |
| return success; |
| } |
| |
| // note that entire expression is treated as if it were enclosed in parens |
| // an open paren is always the first thing in the op stack |
| |
| int SkScriptEngine2::logicalOp(char ch, char nextChar) { |
| int advance = 1; |
| Op op; |
| signed char precedence; |
| switch (ch) { |
| case ')': |
| op = (Op) kParen; |
| break; |
| case ']': |
| op = (Op) kArrayOp; |
| break; |
| case '?': |
| op = (Op) kIf; |
| break; |
| case ':': |
| op = (Op) kElse; |
| break; |
| case '&': |
| if (nextChar != '&') |
| goto noMatch; |
| op = kLogicalAnd; |
| advance = 2; |
| break; |
| case '|': |
| if (nextChar != '|') |
| goto noMatch; |
| op = kLogicalOr; |
| advance = 2; |
| break; |
| default: |
| noMatch: |
| return 0; |
| } |
| precedence = gPrecedence[op]; |
| int branchIndex = 0; |
| fBranchPopAllowed = false; |
| do { |
| while (gPrecedence[fOpStack.top() & ~kArtificialOp] < precedence) |
| processOp(); |
| Branch& branch = fBranchStack.index(branchIndex++); |
| Op branchOp = branch.fOperator; |
| if (gPrecedence[branchOp] >= precedence) |
| break; |
| addTokenValue(fValueStack.top(), kAccumulator); |
| fValueStack.pop(); |
| if (branchOp == kLogicalAnd || branchOp == kLogicalOr) { |
| if (branch.fOperator == kLogicalAnd) |
| branch.prime(); |
| addToken(kToBool); |
| } else |
| resolveBranch(branch); |
| if (branch.fDone == Branch::kIsNotDone) |
| branch.prime(); |
| } while (true); |
| fBranchPopAllowed = true; |
| while (fBranchStack.top().fDone == Branch::kIsDone) |
| fBranchStack.pop(); |
| processLogicalOp(op); |
| return advance; |
| } |
| |
| void SkScriptEngine2::processLogicalOp(Op op) { |
| switch (op) { |
| case kParen: |
| case kArrayOp: |
| SkASSERT(fOpStack.count() > 1 && fOpStack.top() == op); // !!! add error handling |
| if (op == kParen) |
| fOpStack.pop(); |
| else { |
| SkScriptValue2 value; |
| fValueStack.pop(&value); |
| SkASSERT(value.fType == SkOperand2::kS32 || value.fType == SkOperand2::kScalar); // !!! add error handling (although, could permit strings eventually) |
| int index = value.fType == SkOperand2::kScalar ? SkScalarFloorToInt(value.fOperand.fScalar) : |
| value.fOperand.fS32; |
| SkScriptValue2 arrayValue; |
| fValueStack.pop(&arrayValue); |
| SkASSERT(arrayValue.fType == SkOperand2::kArray); // !!! add error handling |
| SkOpArray* array = arrayValue.fOperand.fArray; |
| SkOperand2 operand; |
| SkDEBUGCODE(bool success = ) array->getIndex(index, &operand); |
| SkASSERT(success); // !!! add error handling |
| SkScriptValue2 resultValue; |
| resultValue.fType = array->getType(); |
| resultValue.fOperand = operand; |
| resultValue.fIsConstant = SkScriptValue2::kVariable; |
| fValueStack.push(resultValue); |
| } |
| break; |
| case kIf: { |
| if (fAccumulatorType == SkOperand2::kNoType) { |
| addTokenValue(fValueStack.top(), kAccumulator); |
| fValueStack.pop(); |
| } |
| SkASSERT(fAccumulatorType != SkOperand2::kString); // !!! add error handling |
| addToken(kIfOp); |
| Branch branch(op, fOpStack.count(), getTokenOffset()); |
| *fBranchStack.push() = branch; |
| addTokenInt(0); // placeholder for future branch |
| fAccumulatorType = SkOperand2::kNoType; |
| } break; |
| case kElse: { |
| addTokenValue(fValueStack.top(), kAccumulator); |
| fValueStack.pop(); |
| addToken(kElseOp); |
| size_t newOffset = getTokenOffset(); |
| addTokenInt(0); // placeholder for future branch |
| Branch& branch = fBranchStack.top(); |
| resolveBranch(branch); |
| branch.fOperator = op; |
| branch.fDone = Branch::kIsNotDone; |
| SkASSERT(branch.fOpStackDepth == fOpStack.count()); |
| branch.fOffset = SkToU16(newOffset); |
| fAccumulatorType = SkOperand2::kNoType; |
| } break; |
| case kLogicalAnd: |
| case kLogicalOr: { |
| Branch& oldTop = fBranchStack.top(); |
| Branch::Primed wasPrime = oldTop.fPrimed; |
| Branch::Done wasDone = oldTop.fDone; |
| oldTop.fPrimed = Branch::kIsNotPrimed; |
| oldTop.fDone = Branch::kIsNotDone; |
| if (fAccumulatorType == SkOperand2::kNoType) { |
| SkASSERT(fValueStack.top().fType == SkOperand2::kS32); // !!! add error handling, and conversion to int? |
| addTokenValue(fValueStack.top(), kAccumulator); |
| fValueStack.pop(); |
| } else { |
| SkASSERT(fAccumulatorType == SkOperand2::kS32); |
| } |
| // if 'and', write beq goto opcode after end of predicate (after to bool) |
| // if 'or', write bne goto to bool |
| addToken(op == kLogicalAnd ? kLogicalAndInt : kLogicalOrInt); |
| Branch branch(op, fOpStack.count(), getTokenOffset()); |
| addTokenInt(0); // placeholder for future branch |
| oldTop.fPrimed = wasPrime; |
| oldTop.fDone = wasDone; |
| *fBranchStack.push() = branch; |
| fAccumulatorType = SkOperand2::kNoType; |
| } break; |
| default: |
| SkASSERT(0); |
| } |
| } |
| |
| bool SkScriptEngine2::processOp() { |
| Op op; |
| fOpStack.pop(&op); |
| op = (Op) (op & ~kArtificialOp); |
| const OperatorAttributes* attributes = &gOpAttributes[op]; |
| SkScriptValue2 value1; |
| memset(&value1, 0, sizeof(SkScriptValue2)); |
| SkScriptValue2 value2; |
| fValueStack.pop(&value2); |
| value2.fIsWritten = SkScriptValue2::kUnwritten; |
| // SkScriptEngine2::SkTypeOp convert1[3]; |
| // SkScriptEngine2::SkTypeOp convert2[3]; |
| // SkScriptEngine2::SkTypeOp* convert2Ptr = convert2; |
| bool constantOperands = value2.fIsConstant == SkScriptValue2::kConstant; |
| if (attributes->fLeftType != SkOperand2::kNoType) { |
| fValueStack.pop(&value1); |
| constantOperands &= value1.fIsConstant == SkScriptValue2::kConstant; |
| value1.fIsWritten = SkScriptValue2::kUnwritten; |
| if (op == kFlipOps) { |
| SkTSwap(value1, value2); |
| fOpStack.pop(&op); |
| op = (Op) (op & ~kArtificialOp); |
| attributes = &gOpAttributes[op]; |
| if (constantOperands == false) |
| addToken(kFlipOpsOp); |
| } |
| if (value1.fType == SkOperand2::kObject && (value1.fType & attributes->fLeftType) == 0) { |
| value1.fType = getUnboxType(value1.fOperand); |
| addToken(kUnboxToken); |
| } |
| } |
| if (value2.fType == SkOperand2::kObject && (value2.fType & attributes->fLeftType) == 0) { |
| value1.fType = getUnboxType(value2.fOperand); |
| addToken(kUnboxToken2); |
| } |
| if (attributes->fLeftType != SkOperand2::kNoType) { |
| if (value1.fType != value2.fType) { |
| if ((attributes->fLeftType & SkOperand2::kString) && attributes->fBias & kTowardsString && |
| ((value1.fType | value2.fType) & SkOperand2::kString)) { |
| if (value1.fType == SkOperand2::kS32 || value1.fType == SkOperand2::kScalar) { |
| addTokenConst(&value1, kAccumulator, SkOperand2::kString, |
| value1.fType == SkOperand2::kS32 ? kIntToString : kScalarToString); |
| } |
| if (value2.fType == SkOperand2::kS32 || value2.fType == SkOperand2::kScalar) { |
| addTokenConst(&value2, kOperand, SkOperand2::kString, |
| value2.fType == SkOperand2::kS32 ? kIntToString2 : kScalarToString2); |
| } |
| } else if (attributes->fLeftType & SkOperand2::kScalar && ((value1.fType | value2.fType) & |
| SkOperand2::kScalar)) { |
| if (value1.fType == SkOperand2::kS32) |
| addTokenConst(&value1, kAccumulator, SkOperand2::kScalar, kIntToScalar); |
| if (value2.fType == SkOperand2::kS32) |
| addTokenConst(&value2, kOperand, SkOperand2::kScalar, kIntToScalar2); |
| } |
| } |
| if ((value1.fType & attributes->fLeftType) == 0 || value1.fType != value2.fType) { |
| if (value1.fType == SkOperand2::kString) |
| addTokenConst(&value1, kAccumulator, SkOperand2::kScalar, kStringToScalar); |
| if (value1.fType == SkOperand2::kScalar && (attributes->fLeftType == SkOperand2::kS32 || |
| value2.fType == SkOperand2::kS32)) |
| addTokenConst(&value1, kAccumulator, SkOperand2::kS32, kScalarToInt); |
| } |
| } |
| AddTokenRegister rhRegister = attributes->fLeftType != SkOperand2::kNoType ? |
| kOperand : kAccumulator; |
| if ((value2.fType & attributes->fRightType) == 0 || value1.fType != value2.fType) { |
| if (value2.fType == SkOperand2::kString) |
| addTokenConst(&value2, rhRegister, SkOperand2::kScalar, kStringToScalar2); |
| if (value2.fType == SkOperand2::kScalar && (attributes->fRightType == SkOperand2::kS32 || |
| value1.fType == SkOperand2::kS32)) |
| addTokenConst(&value2, rhRegister, SkOperand2::kS32, kScalarToInt2); |
| } |
| TypeOp typeOp = gTokens[op]; |
| if (value2.fType == SkOperand2::kScalar) |
| typeOp = (TypeOp) (typeOp + 1); |
| else if (value2.fType == SkOperand2::kString) |
| typeOp = (TypeOp) (typeOp + 2); |
| SkDynamicMemoryWStream stream; |
| SkOperand2::OpType saveType = SkOperand2::kNoType; |
| SkBool saveOperand = false; |
| if (constantOperands) { |
| fActiveStream = &stream; |
| saveType = fAccumulatorType; |
| saveOperand = fOperandInUse; |
| fAccumulatorType = SkOperand2::kNoType; |
| fOperandInUse = false; |
| } |
| if (attributes->fLeftType != SkOperand2::kNoType) { // two operands |
| if (value1.fIsWritten == SkScriptValue2::kUnwritten) |
| addTokenValue(value1, kAccumulator); |
| } |
| if (value2.fIsWritten == SkScriptValue2::kUnwritten) |
| addTokenValue(value2, rhRegister); |
| addToken(typeOp); |
| if (constantOperands) { |
| addToken(kEnd); |
| SkAutoDataUnref data(fStream.copyToData()); |
| #ifdef SK_DEBUG |
| decompile(data->bytes(), data->size()); |
| #endif |
| SkScriptRuntime runtime(fCallBackArray); |
| runtime.executeTokens((unsigned char*)data->bytes()); |
| runtime.getResult(&value1.fOperand); |
| if (attributes->fResultIsBoolean == kResultIsBoolean) |
| value1.fType = SkOperand2::kS32; |
| else if (attributes->fLeftType == SkOperand2::kNoType) // unary operand |
| value1.fType = value2.fType; |
| fValueStack.push(value1); |
| if (value1.fType == SkOperand2::kString) |
| runtime.untrack(value1.fOperand.fString); |
| else if (value1.fType == SkOperand2::kArray) |
| runtime.untrack(value1.fOperand.fArray); |
| fActiveStream = &fStream; |
| fAccumulatorType = saveType; |
| fOperandInUse = saveOperand; |
| return true; |
| } |
| value2.fIsConstant = SkScriptValue2::kVariable; |
| fValueStack.push(value2); |
| return true; |
| } |
| |
| void SkScriptEngine2::Branch::resolve(SkDynamicMemoryWStream* stream, size_t off) { |
| SkASSERT(fDone == kIsNotDone); |
| fPrimed = kIsNotPrimed; |
| fDone = kIsDone; |
| SkASSERT(off > fOffset + sizeof(size_t)); |
| size_t offset = off - fOffset - sizeof(offset); |
| stream->write(&offset, fOffset, sizeof(offset)); |
| } |
| |
| void SkScriptEngine2::resolveBranch(SkScriptEngine2::Branch& branch) { |
| branch.resolve(fActiveStream, getTokenOffset()); |
| } |
| |
| bool SkScriptEngine2::ConvertTo(SkScriptEngine2* engine, SkOperand2::OpType toType, SkScriptValue2* value ) { |
| SkASSERT(value); |
| SkOperand2::OpType type = value->fType; |
| if (type == toType) |
| return true; |
| SkOperand2& operand = value->fOperand; |
| bool success = true; |
| switch (toType) { |
| case SkOperand2::kS32: |
| if (type == SkOperand2::kScalar) |
| operand.fS32 = SkScalarFloorToInt(operand.fScalar); |
| else { |
| SkASSERT(type == SkOperand2::kString); |
| success = SkParse::FindS32(operand.fString->c_str(), &operand.fS32) != NULL; |
| } |
| break; |
| case SkOperand2::kScalar: |
| if (type == SkOperand2::kS32) |
| operand.fScalar = IntToScalar(operand.fS32); |
| else { |
| SkASSERT(type == SkOperand2::kString); |
| success = SkParse::FindScalar(operand.fString->c_str(), &operand.fScalar) != NULL; |
| } |
| break; |
| case SkOperand2::kString: { |
| SkString* strPtr = new SkString(); |
| SkASSERT(engine); |
| engine->track(strPtr); |
| if (type == SkOperand2::kS32) |
| strPtr->appendS32(operand.fS32); |
| else { |
| SkASSERT(type == SkOperand2::kScalar); |
| strPtr->appendScalar(operand.fScalar); |
| } |
| operand.fString = strPtr; |
| } break; |
| case SkOperand2::kArray: { |
| SkOpArray* array = new SkOpArray(type); |
| *array->append() = operand; |
| engine->track(array); |
| operand.fArray = array; |
| } break; |
| default: |
| SkASSERT(0); |
| } |
| value->fType = toType; |
| return success; |
| } |
| |
| SkScalar SkScriptEngine2::IntToScalar(int32_t s32) { |
| SkScalar scalar; |
| if (s32 == (int32_t) SK_NaN32) |
| scalar = SK_ScalarNaN; |
| else if (SkAbs32(s32) == SK_MaxS32) |
| scalar = SkSign32(s32) * SK_ScalarMax; |
| else |
| scalar = SkIntToScalar(s32); |
| return scalar; |
| } |
| |
| bool SkScriptEngine2::ValueToString(const SkScriptValue2& value, SkString* string) { |
| switch (value.fType) { |
| case SkOperand2::kS32: |
| string->reset(); |
| string->appendS32(value.fOperand.fS32); |
| break; |
| case SkOperand2::kScalar: |
| string->reset(); |
| string->appendScalar(value.fOperand.fScalar); |
| break; |
| case SkOperand2::kString: |
| string->set(*value.fOperand.fString); |
| break; |
| default: |
| SkASSERT(0); |
| return false; |
| } |
| return true; // no error |
| } |
| |
| #ifdef SK_DEBUG |
| #if defined(SK_SUPPORT_UNITTEST) |
| |
| #define testInt(expression) { #expression, SkOperand2::kS32, expression, 0, NULL } |
| #define testScalar(expression) { #expression, SkOperand2::kScalar, 0, (float) (expression), NULL } |
| #define testRemainder(exp1, exp2) { #exp1 "%" #exp2, SkOperand2::kScalar, 0, fmodf((float) exp1, (float) exp2), NULL } |
| #define testTrue(expression) { #expression, SkOperand2::kS32, 1, 0, NULL } |
| #define testFalse(expression) { #expression, SkOperand2::kS32, 0, 0, NULL } |
| |
| static const SkScriptNAnswer2 scriptTests[] = { |
| testInt(1||(0&&3)), |
| testScalar(- -5.5- -1.5), |
| testScalar(1.0+5), |
| testInt((6+7)*8), |
| testInt(3*(4+5)), |
| testScalar(1.0+2.0), |
| testScalar(3.0-1.0), |
| testScalar(6-1.0), |
| testScalar(2.5*6.), |
| testScalar(0.5*4), |
| testScalar(4.5/.5), |
| testScalar(9.5/19), |
| testRemainder(9.5, 0.5), |
| testRemainder(9.,2), |
| testRemainder(9,2.5), |
| testRemainder(-9,2.5), |
| testTrue(-9==-9.0), |
| testTrue(-9.==-4.0-5), |
| testTrue(-9.*1==-4-5), |
| testFalse(-9!=-9.0), |
| testFalse(-9.!=-4.0-5), |
| testFalse(-9.*1!=-4-5), |
| testInt(0x123), |
| testInt(0XABC), |
| testInt(0xdeadBEEF), |
| { "'123'+\"456\"", SkOperand2::kString, 0, 0, "123456" }, |
| { "123+\"456\"", SkOperand2::kString, 0, 0, "123456" }, |
| { "'123'+456", SkOperand2::kString, 0, 0, "123456" }, |
| { "'123'|\"456\"", SkOperand2::kS32, 123|456, 0, NULL }, |
| { "123|\"456\"", SkOperand2::kS32, 123|456, 0, NULL }, |
| { "'123'|456", SkOperand2::kS32, 123|456, 0, NULL }, |
| { "'2'<11", SkOperand2::kS32, 1, 0, NULL }, |
| { "2<'11'", SkOperand2::kS32, 1, 0, NULL }, |
| { "'2'<'11'", SkOperand2::kS32, 0, 0, NULL }, |
| testInt(123), |
| testInt(-345), |
| testInt(+678), |
| testInt(1+2+3), |
| testInt(3*4+5), |
| testInt(6+7*8), |
| testInt(-1-2-8/4), |
| testInt(-9%4), |
| testInt(9%-4), |
| testInt(-9%-4), |
| testInt(123|978), |
| testInt(123&978), |
| testInt(123^978), |
| testInt(2<<4), |
| testInt(99>>3), |
| testInt(~55), |
| testInt(~~55), |
| testInt(!55), |
| testInt(!!55), |
| // both int |
| testInt(2<2), |
| testInt(2<11), |
| testInt(20<11), |
| testInt(2<=2), |
| testInt(2<=11), |
| testInt(20<=11), |
| testInt(2>2), |
| testInt(2>11), |
| testInt(20>11), |
| testInt(2>=2), |
| testInt(2>=11), |
| testInt(20>=11), |
| testInt(2==2), |
| testInt(2==11), |
| testInt(20==11), |
| testInt(2!=2), |
| testInt(2!=11), |
| testInt(20!=11), |
| // left int, right scalar |
| testInt(2<2.), |
| testInt(2<11.), |
| testInt(20<11.), |
| testInt(2<=2.), |
| testInt(2<=11.), |
| testInt(20<=11.), |
| testInt(2>2.), |
| testInt(2>11.), |
| testInt(20>11.), |
| testInt(2>=2.), |
| testInt(2>=11.), |
| testInt(20>=11.), |
| testInt(2==2.), |
| testInt(2==11.), |
| testInt(20==11.), |
| testInt(2!=2.), |
| testInt(2!=11.), |
| testInt(20!=11.), |
| // left scalar, right int |
| testInt(2.<2), |
| testInt(2.<11), |
| testInt(20.<11), |
| testInt(2.<=2), |
| testInt(2.<=11), |
| testInt(20.<=11), |
| testInt(2.>2), |
| testInt(2.>11), |
| testInt(20.>11), |
| testInt(2.>=2), |
| testInt(2.>=11), |
| testInt(20.>=11), |
| testInt(2.==2), |
| testInt(2.==11), |
| testInt(20.==11), |
| testInt(2.!=2), |
| testInt(2.!=11), |
| testInt(20.!=11), |
| // both scalar |
| testInt(2.<11.), |
| testInt(20.<11.), |
| testInt(2.<=2.), |
| testInt(2.<=11.), |
| testInt(20.<=11.), |
| testInt(2.>2.), |
| testInt(2.>11.), |
| testInt(20.>11.), |
| testInt(2.>=2.), |
| testInt(2.>=11.), |
| testInt(20.>=11.), |
| testInt(2.==2.), |
| testInt(2.==11.), |
| testInt(20.==11.), |
| testInt(2.!=2.), |
| testInt(2.!=11.), |
| testInt(20.!=11.), |
| // int, string (string is int) |
| testFalse(2<'2'), |
| testTrue(2<'11'), |
| testFalse(20<'11'), |
| testTrue(2<='2'), |
| testTrue(2<='11'), |
| testFalse(20<='11'), |
| testFalse(2>'2'), |
| testFalse(2>'11'), |
| testTrue(20>'11'), |
| testTrue(2>='2'), |
| testFalse(2>='11'), |
| testTrue(20>='11'), |
| testTrue(2=='2'), |
| testFalse(2=='11'), |
| testFalse(2!='2'), |
| testTrue(2!='11'), |
| // int, string (string is scalar) |
| testFalse(2<'2.'), |
| testTrue(2<'11.'), |
| testFalse(20<'11.'), |
| testTrue(2=='2.'), |
| testFalse(2=='11.'), |
| // scalar, string |
| testFalse(2.<'2.'), |
| testTrue(2.<'11.'), |
| testFalse(20.<'11.'), |
| testTrue(2.=='2.'), |
| testFalse(2.=='11.'), |
| // string, int |
| testFalse('2'<2), |
| testTrue('2'<11), |
| testFalse('20'<11), |
| testTrue('2'==2), |
| testFalse('2'==11), |
| // string, scalar |
| testFalse('2'<2.), |
| testTrue('2'<11.), |
| testFalse('20'<11.), |
| testTrue('2'==2.), |
| testFalse('2'==11.), |
| // string, string |
| testFalse('2'<'2'), |
| testFalse('2'<'11'), |
| testFalse('20'<'11'), |
| testTrue('2'=='2'), |
| testFalse('2'=='11'), |
| // logic |
| testInt(1?2:3), |
| testInt(0?2:3), |
| testInt((1&&2)||3), |
| testInt((1&&0)||3), |
| testInt((1&&0)||0), |
| testInt(1||(0&&3)), |
| testInt(0||(0&&3)), |
| testInt(0||(1&&3)), |
| testInt(0&&1?2:3) |
| , { "123.5", SkOperand2::kScalar, 0, SkIntToScalar(123) + SK_Scalar1/2, NULL } |
| }; |
| |
| #define SkScriptNAnswer_testCount SK_ARRAY_COUNT(scriptTests) |
| #endif // SK_SUPPORT_UNITTEST |
| |
| void SkScriptEngine2::UnitTest() { |
| #if defined(SK_SUPPORT_UNITTEST) |
| ValidateDecompileTable(); |
| for (size_t index = 0; index < SkScriptNAnswer_testCount; index++) { |
| SkScriptEngine2 engine(scriptTests[index].fType); |
| SkScriptValue2 value; |
| const char* script = scriptTests[index].fScript; |
| const char* scriptPtr = script; |
| SkASSERT(engine.evaluateScript(&scriptPtr, &value) == true); |
| SkASSERT(value.fType == scriptTests[index].fType); |
| SkScalar error; |
| switch (value.fType) { |
| case SkOperand2::kS32: |
| if (value.fOperand.fS32 != scriptTests[index].fIntAnswer) |
| SkDEBUGF(("script '%s' == value %d != expected answer %d\n", script, value.fOperand.fS32, scriptTests[index].fIntAnswer)); |
| SkASSERT(value.fOperand.fS32 == scriptTests[index].fIntAnswer); |
| break; |
| case SkOperand2::kScalar: |
| error = SkScalarAbs(value.fOperand.fScalar - scriptTests[index].fScalarAnswer); |
| if (error >= SK_Scalar1 / 10000) |
| SkDEBUGF(("script '%s' == value %g != expected answer %g\n", script, value.fOperand.fScalar / (1.0f * SK_Scalar1), scriptTests[index].fScalarAnswer / (1.0f * SK_Scalar1))); |
| SkASSERT(error < SK_Scalar1 / 10000); |
| break; |
| case SkOperand2::kString: |
| SkASSERT(value.fOperand.fString->equals(scriptTests[index].fStringAnswer)); |
| break; |
| default: |
| SkASSERT(0); |
| } |
| } |
| #endif // SK_SUPPORT_UNITTEST |
| } |
| #endif // SK_DEBUG |
