| // -*- c-basic-offset: 2 -*- |
| /* |
| * Copyright (C) 1999-2002 Harri Porten (porten@kde.org) |
| * Copyright (C) 2001 Peter Kelly (pmk@post.com) |
| * Copyright (C) 2003, 2004, 2005, 2006, 2007 Apple Inc. All rights reserved. |
| * Copyright (C) 2007 Cameron Zwarich (cwzwarich@uwaterloo.ca) |
| * Copyright (C) 2007 Maks Orlovich |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Library General Public |
| * License as published by the Free Software Foundation; either |
| * version 2 of the License, or (at your option) any later version. |
| * |
| * This library 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 |
| * Library General Public License for more details. |
| * |
| * You should have received a copy of the GNU Library General Public License |
| * along with this library; see the file COPYING.LIB. If not, write to |
| * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
| * Boston, MA 02110-1301, USA. |
| * |
| */ |
| |
| #include "config.h" |
| #include "function.h" |
| |
| #include "Activation.h" |
| #include "ExecState.h" |
| #include "JSGlobalObject.h" |
| #include "Parser.h" |
| #include "PropertyNameArray.h" |
| #include "debugger.h" |
| #include "dtoa.h" |
| #include "function_object.h" |
| #include "internal.h" |
| #include "lexer.h" |
| #include "nodes.h" |
| #include "operations.h" |
| #include "scope_chain_mark.h" |
| #include <errno.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <wtf/ASCIICType.h> |
| #include <wtf/Assertions.h> |
| #include <wtf/MathExtras.h> |
| #include <wtf/unicode/UTF8.h> |
| |
| using namespace WTF; |
| using namespace Unicode; |
| |
| namespace KJS { |
| |
| // ----------------------------- FunctionImp ---------------------------------- |
| |
| const ClassInfo FunctionImp::info = { "Function", &InternalFunctionImp::info, 0 }; |
| |
| FunctionImp::FunctionImp(ExecState* exec, const Identifier& name, FunctionBodyNode* b, const ScopeChain& sc) |
| : InternalFunctionImp(exec->lexicalGlobalObject()->functionPrototype(), name) |
| , body(b) |
| , _scope(sc) |
| { |
| } |
| |
| void FunctionImp::mark() |
| { |
| InternalFunctionImp::mark(); |
| _scope.mark(); |
| } |
| |
| JSValue* FunctionImp::callAsFunction(ExecState* exec, JSObject* thisObj, const List& args) |
| { |
| FunctionExecState newExec(exec->dynamicGlobalObject(), thisObj, body.get(), exec, this, args); |
| JSValue* result = body->execute(&newExec); |
| if (newExec.completionType() == Throw) { |
| exec->setException(result); |
| return result; |
| } |
| if (newExec.completionType() == ReturnValue) |
| return result; |
| return jsUndefined(); |
| } |
| |
| JSValue* FunctionImp::argumentsGetter(ExecState* exec, JSObject*, const Identifier& propertyName, const PropertySlot& slot) |
| { |
| FunctionImp* thisObj = static_cast<FunctionImp*>(slot.slotBase()); |
| |
| for (ExecState* e = exec; e; e = e->callingExecState()) |
| if (e->function() == thisObj) { |
| e->dynamicGlobalObject()->tearOffActivation(e, e != exec); |
| return e->activationObject()->get(exec, propertyName); |
| } |
| |
| return jsNull(); |
| } |
| |
| JSValue* FunctionImp::callerGetter(ExecState* exec, JSObject*, const Identifier&, const PropertySlot& slot) |
| { |
| FunctionImp* thisObj = static_cast<FunctionImp*>(slot.slotBase()); |
| ExecState* e = exec; |
| while (e) { |
| if (e->function() == thisObj) |
| break; |
| e = e->callingExecState(); |
| } |
| |
| if (!e) |
| return jsNull(); |
| |
| ExecState* callingExecState = e->callingExecState(); |
| if (!callingExecState) |
| return jsNull(); |
| |
| FunctionImp* callingFunction = callingExecState->function(); |
| if (!callingFunction) |
| return jsNull(); |
| |
| return callingFunction; |
| } |
| |
| JSValue* FunctionImp::lengthGetter(ExecState*, JSObject*, const Identifier&, const PropertySlot& slot) |
| { |
| FunctionImp* thisObj = static_cast<FunctionImp*>(slot.slotBase()); |
| return jsNumber(thisObj->body->parameters().size()); |
| } |
| |
| bool FunctionImp::getOwnPropertySlot(ExecState* exec, const Identifier& propertyName, PropertySlot& slot) |
| { |
| // Find the arguments from the closest context. |
| if (propertyName == exec->propertyNames().arguments) { |
| slot.setCustom(this, argumentsGetter); |
| return true; |
| } |
| |
| // Compute length of parameters. |
| if (propertyName == exec->propertyNames().length) { |
| slot.setCustom(this, lengthGetter); |
| return true; |
| } |
| |
| if (propertyName == exec->propertyNames().caller) { |
| slot.setCustom(this, callerGetter); |
| return true; |
| } |
| |
| return InternalFunctionImp::getOwnPropertySlot(exec, propertyName, slot); |
| } |
| |
| void FunctionImp::put(ExecState* exec, const Identifier& propertyName, JSValue* value, int attr) |
| { |
| if (propertyName == exec->propertyNames().arguments || propertyName == exec->propertyNames().length) |
| return; |
| InternalFunctionImp::put(exec, propertyName, value, attr); |
| } |
| |
| bool FunctionImp::deleteProperty(ExecState* exec, const Identifier& propertyName) |
| { |
| if (propertyName == exec->propertyNames().arguments || propertyName == exec->propertyNames().length) |
| return false; |
| return InternalFunctionImp::deleteProperty(exec, propertyName); |
| } |
| |
| /* Returns the parameter name corresponding to the given index. eg: |
| * function f1(x, y, z): getParameterName(0) --> x |
| * |
| * If a name appears more than once, only the last index at which |
| * it appears associates with it. eg: |
| * function f2(x, x): getParameterName(0) --> null |
| */ |
| Identifier FunctionImp::getParameterName(int index) |
| { |
| Vector<Identifier>& parameters = body->parameters(); |
| |
| if (static_cast<size_t>(index) >= body->parameters().size()) |
| return CommonIdentifiers::shared()->nullIdentifier; |
| |
| Identifier name = parameters[index]; |
| |
| // Are there any subsequent parameters with the same name? |
| size_t size = parameters.size(); |
| for (size_t i = index + 1; i < size; ++i) |
| if (parameters[i] == name) |
| return CommonIdentifiers::shared()->nullIdentifier; |
| |
| return name; |
| } |
| |
| // ECMA 13.2.2 [[Construct]] |
| JSObject* FunctionImp::construct(ExecState* exec, const List& args) |
| { |
| JSObject* proto; |
| JSValue* p = get(exec, exec->propertyNames().prototype); |
| if (p->isObject()) |
| proto = static_cast<JSObject*>(p); |
| else |
| proto = exec->lexicalGlobalObject()->objectPrototype(); |
| |
| JSObject* obj(new JSObject(proto)); |
| |
| JSValue* res = call(exec,obj,args); |
| |
| if (res->isObject()) |
| return static_cast<JSObject*>(res); |
| else |
| return obj; |
| } |
| |
| // ------------------------------ IndexToNameMap --------------------------------- |
| |
| // We map indexes in the arguments array to their corresponding argument names. |
| // Example: function f(x, y, z): arguments[0] = x, so we map 0 to Identifier("x"). |
| |
| // Once we have an argument name, we can get and set the argument's value in the |
| // activation object. |
| |
| // We use Identifier::null to indicate that a given argument's value |
| // isn't stored in the activation object. |
| |
| IndexToNameMap::IndexToNameMap(FunctionImp* func, const List& args) |
| { |
| _map = new Identifier[args.size()]; |
| this->size = args.size(); |
| |
| int i = 0; |
| List::const_iterator end = args.end(); |
| for (List::const_iterator it = args.begin(); it != end; ++i, ++it) |
| _map[i] = func->getParameterName(i); // null if there is no corresponding parameter |
| } |
| |
| IndexToNameMap::~IndexToNameMap() { |
| delete [] _map; |
| } |
| |
| bool IndexToNameMap::isMapped(const Identifier& index) const |
| { |
| bool indexIsNumber; |
| int indexAsNumber = index.toUInt32(&indexIsNumber); |
| |
| if (!indexIsNumber) |
| return false; |
| |
| if (indexAsNumber >= size) |
| return false; |
| |
| if (_map[indexAsNumber].isNull()) |
| return false; |
| |
| return true; |
| } |
| |
| void IndexToNameMap::unMap(const Identifier& index) |
| { |
| bool indexIsNumber; |
| int indexAsNumber = index.toUInt32(&indexIsNumber); |
| |
| ASSERT(indexIsNumber && indexAsNumber < size); |
| |
| _map[indexAsNumber] = CommonIdentifiers::shared()->nullIdentifier; |
| } |
| |
| Identifier& IndexToNameMap::operator[](int index) |
| { |
| return _map[index]; |
| } |
| |
| Identifier& IndexToNameMap::operator[](const Identifier& index) |
| { |
| bool indexIsNumber; |
| int indexAsNumber = index.toUInt32(&indexIsNumber); |
| |
| ASSERT(indexIsNumber && indexAsNumber < size); |
| |
| return (*this)[indexAsNumber]; |
| } |
| |
| // ------------------------------ Arguments --------------------------------- |
| |
| const ClassInfo Arguments::info = { "Arguments", 0, 0 }; |
| |
| // ECMA 10.1.8 |
| Arguments::Arguments(ExecState* exec, FunctionImp* func, const List& args, ActivationImp* act) |
| : JSObject(exec->lexicalGlobalObject()->objectPrototype()) |
| , _activationObject(act) |
| , indexToNameMap(func, args) |
| { |
| putDirect(exec->propertyNames().callee, func, DontEnum); |
| putDirect(exec->propertyNames().length, args.size(), DontEnum); |
| |
| int i = 0; |
| List::const_iterator end = args.end(); |
| for (List::const_iterator it = args.begin(); it != end; ++it, ++i) { |
| Identifier name = Identifier::from(i); |
| if (!indexToNameMap.isMapped(name)) |
| putDirect(name, *it, DontEnum); |
| } |
| } |
| |
| void Arguments::mark() |
| { |
| JSObject::mark(); |
| if (_activationObject && !_activationObject->marked()) |
| _activationObject->mark(); |
| } |
| |
| JSValue* Arguments::mappedIndexGetter(ExecState* exec, JSObject*, const Identifier& propertyName, const PropertySlot& slot) |
| { |
| Arguments* thisObj = static_cast<Arguments*>(slot.slotBase()); |
| return thisObj->_activationObject->get(exec, thisObj->indexToNameMap[propertyName]); |
| } |
| |
| bool Arguments::getOwnPropertySlot(ExecState* exec, const Identifier& propertyName, PropertySlot& slot) |
| { |
| if (indexToNameMap.isMapped(propertyName)) { |
| slot.setCustom(this, mappedIndexGetter); |
| return true; |
| } |
| |
| return JSObject::getOwnPropertySlot(exec, propertyName, slot); |
| } |
| |
| void Arguments::put(ExecState* exec, const Identifier& propertyName, JSValue* value, int attr) |
| { |
| if (indexToNameMap.isMapped(propertyName)) { |
| _activationObject->put(exec, indexToNameMap[propertyName], value, attr); |
| } else { |
| JSObject::put(exec, propertyName, value, attr); |
| } |
| } |
| |
| bool Arguments::deleteProperty(ExecState* exec, const Identifier& propertyName) |
| { |
| if (indexToNameMap.isMapped(propertyName)) { |
| indexToNameMap.unMap(propertyName); |
| return true; |
| } else { |
| return JSObject::deleteProperty(exec, propertyName); |
| } |
| } |
| |
| // ------------------------------ ActivationImp -------------------------------- |
| |
| const ClassInfo ActivationImp::info = { "Activation", 0, 0 }; |
| |
| ActivationImp::ActivationImp(const ActivationData& oldData, bool leaveRelic) |
| { |
| JSVariableObject::d = new ActivationData(oldData); |
| d()->leftRelic = leaveRelic; |
| } |
| |
| ActivationImp::~ActivationImp() |
| { |
| if (!d()->isOnStack) |
| delete d(); |
| } |
| |
| void ActivationImp::init(ExecState* exec) |
| { |
| d()->symbolTable = &exec->function()->body->symbolTable(); |
| d()->exec = exec; |
| d()->function = exec->function(); |
| d()->argumentsObject = 0; |
| } |
| |
| JSValue* ActivationImp::argumentsGetter(ExecState* exec, JSObject*, const Identifier&, const PropertySlot& slot) |
| { |
| ActivationImp* thisObj = static_cast<ActivationImp*>(slot.slotBase()); |
| |
| if (!thisObj->d()->argumentsObject) |
| thisObj->createArgumentsObject(exec); |
| |
| return thisObj->d()->argumentsObject; |
| } |
| |
| PropertySlot::GetValueFunc ActivationImp::getArgumentsGetter() |
| { |
| return ActivationImp::argumentsGetter; |
| } |
| |
| bool ActivationImp::getOwnPropertySlot(ExecState* exec, const Identifier& propertyName, PropertySlot& slot) |
| { |
| if (symbolTableGet(propertyName, slot)) |
| return true; |
| |
| if (JSValue** location = getDirectLocation(propertyName)) { |
| slot.setValueSlot(this, location); |
| return true; |
| } |
| |
| // Only return the built-in arguments object if it wasn't overridden above. |
| if (propertyName == exec->propertyNames().arguments) { |
| for (ExecState* e = exec; e; e = e->callingExecState()) |
| if (e->function() == d()->function) { |
| e->dynamicGlobalObject()->tearOffActivation(e, e != exec); |
| ActivationImp* newActivation = e->activationObject(); |
| slot.setCustom(newActivation, newActivation->getArgumentsGetter()); |
| return true; |
| } |
| |
| slot.setCustom(this, getArgumentsGetter()); |
| return true; |
| } |
| |
| // We don't call through to JSObject because there's no way to give an |
| // activation object getter properties or a prototype. |
| ASSERT(!_prop.hasGetterSetterProperties()); |
| ASSERT(prototype() == jsNull()); |
| return false; |
| } |
| |
| bool ActivationImp::deleteProperty(ExecState* exec, const Identifier& propertyName) |
| { |
| if (propertyName == exec->propertyNames().arguments) |
| return false; |
| |
| return JSVariableObject::deleteProperty(exec, propertyName); |
| } |
| |
| void ActivationImp::put(ExecState*, const Identifier& propertyName, JSValue* value, int attr) |
| { |
| // If any bits other than DontDelete are set, then we bypass the read-only check. |
| bool checkReadOnly = !(attr & ~DontDelete); |
| if (symbolTablePut(propertyName, value, checkReadOnly)) |
| return; |
| |
| // We don't call through to JSObject because __proto__ and getter/setter |
| // properties are non-standard extensions that other implementations do not |
| // expose in the activation object. |
| ASSERT(!_prop.hasGetterSetterProperties()); |
| _prop.put(propertyName, value, attr, checkReadOnly); |
| } |
| |
| void ActivationImp::markChildren() |
| { |
| LocalStorage& localStorage = d()->localStorage; |
| size_t size = localStorage.size(); |
| |
| for (size_t i = 0; i < size; ++i) { |
| JSValue* value = localStorage[i].value; |
| |
| if (!value->marked()) |
| value->mark(); |
| } |
| |
| if (!d()->function->marked()) |
| d()->function->mark(); |
| |
| if (d()->argumentsObject && !d()->argumentsObject->marked()) |
| d()->argumentsObject->mark(); |
| } |
| |
| void ActivationImp::mark() |
| { |
| JSObject::mark(); |
| markChildren(); |
| } |
| |
| void ActivationImp::createArgumentsObject(ExecState* exec) |
| { |
| // Since "arguments" is only accessible while a function is being called, |
| // we can retrieve our argument list from the ExecState for our function |
| // call instead of storing the list ourselves. |
| d()->argumentsObject = new Arguments(exec, d()->exec->function(), *d()->exec->arguments(), this); |
| } |
| |
| ActivationImp::ActivationData::ActivationData(const ActivationData& old) |
| : JSVariableObjectData(old) |
| , exec(old.exec) |
| , function(old.function) |
| , argumentsObject(old.argumentsObject) |
| , isOnStack(false) |
| { |
| } |
| |
| // ------------------------------ Global Functions ----------------------------------- |
| |
| static JSValue* encode(ExecState* exec, const List& args, const char* do_not_escape) |
| { |
| UString r = "", s, str = args[0]->toString(exec); |
| CString cstr = str.UTF8String(true); |
| if (!cstr.c_str()) |
| return throwError(exec, URIError, "String contained an illegal UTF-16 sequence."); |
| const char* p = cstr.c_str(); |
| for (size_t k = 0; k < cstr.size(); k++, p++) { |
| char c = *p; |
| if (c && strchr(do_not_escape, c)) { |
| r.append(c); |
| } else { |
| char tmp[4]; |
| sprintf(tmp, "%%%02X", (unsigned char)c); |
| r += tmp; |
| } |
| } |
| return jsString(r); |
| } |
| |
| static JSValue* decode(ExecState* exec, const List& args, const char* do_not_unescape, bool strict) |
| { |
| UString s = "", str = args[0]->toString(exec); |
| int k = 0, len = str.size(); |
| const UChar* d = str.data(); |
| UChar u; |
| while (k < len) { |
| const UChar* p = d + k; |
| UChar c = *p; |
| if (c == '%') { |
| int charLen = 0; |
| if (k <= len - 3 && isASCIIHexDigit(p[1].uc) && isASCIIHexDigit(p[2].uc)) { |
| const char b0 = Lexer::convertHex(p[1].uc, p[2].uc); |
| const int sequenceLen = UTF8SequenceLength(b0); |
| if (sequenceLen != 0 && k <= len - sequenceLen * 3) { |
| charLen = sequenceLen * 3; |
| char sequence[5]; |
| sequence[0] = b0; |
| for (int i = 1; i < sequenceLen; ++i) { |
| const UChar* q = p + i * 3; |
| if (q[0] == '%' && isASCIIHexDigit(q[1].uc) && isASCIIHexDigit(q[2].uc)) |
| sequence[i] = Lexer::convertHex(q[1].uc, q[2].uc); |
| else { |
| charLen = 0; |
| break; |
| } |
| } |
| if (charLen != 0) { |
| sequence[sequenceLen] = 0; |
| const int character = decodeUTF8Sequence(sequence); |
| if (character < 0 || character >= 0x110000) { |
| charLen = 0; |
| } else if (character >= 0x10000) { |
| // Convert to surrogate pair. |
| s.append(static_cast<unsigned short>(0xD800 | ((character - 0x10000) >> 10))); |
| u = static_cast<unsigned short>(0xDC00 | ((character - 0x10000) & 0x3FF)); |
| } else { |
| u = static_cast<unsigned short>(character); |
| } |
| } |
| } |
| } |
| if (charLen == 0) { |
| if (strict) |
| return throwError(exec, URIError); |
| // The only case where we don't use "strict" mode is the "unescape" function. |
| // For that, it's good to support the wonky "%u" syntax for compatibility with WinIE. |
| if (k <= len - 6 && p[1] == 'u' |
| && isASCIIHexDigit(p[2].uc) && isASCIIHexDigit(p[3].uc) |
| && isASCIIHexDigit(p[4].uc) && isASCIIHexDigit(p[5].uc)) { |
| charLen = 6; |
| u = Lexer::convertUnicode(p[2].uc, p[3].uc, p[4].uc, p[5].uc); |
| } |
| } |
| if (charLen && (u.uc == 0 || u.uc >= 128 || !strchr(do_not_unescape, u.low()))) { |
| c = u; |
| k += charLen - 1; |
| } |
| } |
| k++; |
| s.append(c); |
| } |
| return jsString(s); |
| } |
| |
| static bool isStrWhiteSpace(unsigned short c) |
| { |
| switch (c) { |
| case 0x0009: |
| case 0x000A: |
| case 0x000B: |
| case 0x000C: |
| case 0x000D: |
| case 0x0020: |
| case 0x00A0: |
| case 0x2028: |
| case 0x2029: |
| return true; |
| default: |
| return isSeparatorSpace(c); |
| } |
| } |
| |
| static int parseDigit(unsigned short c, int radix) |
| { |
| int digit = -1; |
| |
| if (c >= '0' && c <= '9') { |
| digit = c - '0'; |
| } else if (c >= 'A' && c <= 'Z') { |
| digit = c - 'A' + 10; |
| } else if (c >= 'a' && c <= 'z') { |
| digit = c - 'a' + 10; |
| } |
| |
| if (digit >= radix) |
| return -1; |
| return digit; |
| } |
| |
| double parseIntOverflow(const char* s, int length, int radix) |
| { |
| double number = 0.0; |
| double radixMultiplier = 1.0; |
| |
| for (const char* p = s + length - 1; p >= s; p--) { |
| if (radixMultiplier == Inf) { |
| if (*p != '0') { |
| number = Inf; |
| break; |
| } |
| } else { |
| int digit = parseDigit(*p, radix); |
| number += digit * radixMultiplier; |
| } |
| |
| radixMultiplier *= radix; |
| } |
| |
| return number; |
| } |
| |
| static double parseInt(const UString& s, int radix) |
| { |
| int length = s.size(); |
| int p = 0; |
| |
| while (p < length && isStrWhiteSpace(s[p].uc)) { |
| ++p; |
| } |
| |
| double sign = 1; |
| if (p < length) { |
| if (s[p] == '+') { |
| ++p; |
| } else if (s[p] == '-') { |
| sign = -1; |
| ++p; |
| } |
| } |
| |
| if ((radix == 0 || radix == 16) && length - p >= 2 && s[p] == '0' && (s[p + 1] == 'x' || s[p + 1] == 'X')) { |
| radix = 16; |
| p += 2; |
| } else if (radix == 0) { |
| if (p < length && s[p] == '0') |
| radix = 8; |
| else |
| radix = 10; |
| } |
| |
| if (radix < 2 || radix > 36) |
| return NaN; |
| |
| int firstDigitPosition = p; |
| bool sawDigit = false; |
| double number = 0; |
| while (p < length) { |
| int digit = parseDigit(s[p].uc, radix); |
| if (digit == -1) |
| break; |
| sawDigit = true; |
| number *= radix; |
| number += digit; |
| ++p; |
| } |
| |
| if (number >= mantissaOverflowLowerBound) { |
| if (radix == 10) |
| number = kjs_strtod(s.substr(firstDigitPosition, p - firstDigitPosition).ascii(), 0); |
| else if (radix == 2 || radix == 4 || radix == 8 || radix == 16 || radix == 32) |
| number = parseIntOverflow(s.substr(firstDigitPosition, p - firstDigitPosition).ascii(), p - firstDigitPosition, radix); |
| } |
| |
| if (!sawDigit) |
| return NaN; |
| |
| return sign * number; |
| } |
| |
| static double parseFloat(const UString& s) |
| { |
| // Check for 0x prefix here, because toDouble allows it, but we must treat it as 0. |
| // Need to skip any whitespace and then one + or - sign. |
| int length = s.size(); |
| int p = 0; |
| while (p < length && isStrWhiteSpace(s[p].uc)) { |
| ++p; |
| } |
| if (p < length && (s[p] == '+' || s[p] == '-')) { |
| ++p; |
| } |
| if (length - p >= 2 && s[p] == '0' && (s[p + 1] == 'x' || s[p + 1] == 'X')) { |
| return 0; |
| } |
| |
| return s.toDouble( true /*tolerant*/, false /* NaN for empty string */ ); |
| } |
| |
| JSValue* globalFuncEval(ExecState* exec, JSObject* thisObj, const List& args) |
| { |
| JSValue* x = args[0]; |
| if (!x->isString()) |
| return x; |
| |
| UString s = x->toString(exec); |
| |
| int sourceId; |
| int errLine; |
| UString errMsg; |
| RefPtr<EvalNode> evalNode = parser().parse<EvalNode>(UString(), 0, s.data(), s.size(), &sourceId, &errLine, &errMsg); |
| |
| Debugger* dbg = exec->dynamicGlobalObject()->debugger(); |
| if (dbg) { |
| bool cont = dbg->sourceParsed(exec, sourceId, UString(), s, 0, errLine, errMsg); |
| if (!cont) |
| return jsUndefined(); |
| } |
| |
| // No program node means a syntax occurred |
| if (!evalNode) |
| return throwError(exec, SyntaxError, errMsg, errLine, sourceId, NULL); |
| |
| bool switchGlobal = thisObj && thisObj != exec->dynamicGlobalObject() && thisObj->isGlobalObject(); |
| |
| // enter a new execution context |
| exec->dynamicGlobalObject()->tearOffActivation(exec); |
| JSGlobalObject* globalObject = switchGlobal ? static_cast<JSGlobalObject*>(thisObj) : exec->dynamicGlobalObject(); |
| EvalExecState newExec(globalObject, evalNode.get(), exec); |
| |
| if (switchGlobal) { |
| newExec.pushScope(thisObj); |
| newExec.setVariableObject(static_cast<JSGlobalObject*>(thisObj)); |
| } |
| JSValue* value = evalNode->execute(&newExec); |
| if (switchGlobal) |
| newExec.popScope(); |
| |
| if (newExec.completionType() == Throw) { |
| exec->setException(value); |
| return value; |
| } |
| |
| return value ? value : jsUndefined(); |
| } |
| |
| JSValue* globalFuncParseInt(ExecState* exec, JSObject*, const List& args) |
| { |
| return jsNumber(parseInt(args[0]->toString(exec), args[1]->toInt32(exec))); |
| } |
| |
| JSValue* globalFuncParseFloat(ExecState* exec, JSObject*, const List& args) |
| { |
| return jsNumber(parseFloat(args[0]->toString(exec))); |
| } |
| |
| JSValue* globalFuncIsNaN(ExecState* exec, JSObject*, const List& args) |
| { |
| return jsBoolean(isnan(args[0]->toNumber(exec))); |
| } |
| |
| JSValue* globalFuncIsFinite(ExecState* exec, JSObject*, const List& args) |
| { |
| double n = args[0]->toNumber(exec); |
| return jsBoolean(!isnan(n) && !isinf(n)); |
| } |
| |
| JSValue* globalFuncDecodeURI(ExecState* exec, JSObject*, const List& args) |
| { |
| static const char do_not_unescape_when_decoding_URI[] = |
| "#$&+,/:;=?@"; |
| |
| return decode(exec, args, do_not_unescape_when_decoding_URI, true); |
| } |
| |
| JSValue* globalFuncDecodeURIComponent(ExecState* exec, JSObject*, const List& args) |
| { |
| return decode(exec, args, "", true); |
| } |
| |
| JSValue* globalFuncEncodeURI(ExecState* exec, JSObject*, const List& args) |
| { |
| static const char do_not_escape_when_encoding_URI[] = |
| "ABCDEFGHIJKLMNOPQRSTUVWXYZ" |
| "abcdefghijklmnopqrstuvwxyz" |
| "0123456789" |
| "!#$&'()*+,-./:;=?@_~"; |
| |
| return encode(exec, args, do_not_escape_when_encoding_URI); |
| } |
| |
| JSValue* globalFuncEncodeURIComponent(ExecState* exec, JSObject*, const List& args) |
| { |
| static const char do_not_escape_when_encoding_URI_component[] = |
| "ABCDEFGHIJKLMNOPQRSTUVWXYZ" |
| "abcdefghijklmnopqrstuvwxyz" |
| "0123456789" |
| "!'()*-._~"; |
| |
| return encode(exec, args, do_not_escape_when_encoding_URI_component); |
| } |
| |
| JSValue* globalFuncEscape(ExecState* exec, JSObject*, const List& args) |
| { |
| static const char do_not_escape[] = |
| "ABCDEFGHIJKLMNOPQRSTUVWXYZ" |
| "abcdefghijklmnopqrstuvwxyz" |
| "0123456789" |
| "*+-./@_"; |
| |
| UString r = "", s, str = args[0]->toString(exec); |
| const UChar* c = str.data(); |
| for (int k = 0; k < str.size(); k++, c++) { |
| int u = c->uc; |
| if (u > 255) { |
| char tmp[7]; |
| sprintf(tmp, "%%u%04X", u); |
| s = UString(tmp); |
| } else if (u != 0 && strchr(do_not_escape, (char)u)) |
| s = UString(c, 1); |
| else { |
| char tmp[4]; |
| sprintf(tmp, "%%%02X", u); |
| s = UString(tmp); |
| } |
| r += s; |
| } |
| |
| return jsString(r); |
| } |
| |
| JSValue* globalFuncUnescape(ExecState* exec, JSObject*, const List& args) |
| { |
| UString s = "", str = args[0]->toString(exec); |
| int k = 0, len = str.size(); |
| while (k < len) { |
| const UChar* c = str.data() + k; |
| UChar u; |
| if (*c == UChar('%') && k <= len - 6 && *(c + 1) == UChar('u')) { |
| if (Lexer::isHexDigit((c + 2)->uc) && Lexer::isHexDigit((c + 3)->uc) && Lexer::isHexDigit((c + 4)->uc) && Lexer::isHexDigit((c + 5)->uc)) { |
| u = Lexer::convertUnicode((c + 2)->uc, (c + 3)->uc, (c + 4)->uc, (c + 5)->uc); |
| c = &u; |
| k += 5; |
| } |
| } else if (*c == UChar('%') && k <= len - 3 && Lexer::isHexDigit((c + 1)->uc) && Lexer::isHexDigit((c + 2)->uc)) { |
| u = UChar(Lexer::convertHex((c+1)->uc, (c+2)->uc)); |
| c = &u; |
| k += 2; |
| } |
| k++; |
| s += UString(c, 1); |
| } |
| |
| return jsString(s); |
| } |
| |
| #ifndef NDEBUG |
| JSValue* globalFuncKJSPrint(ExecState* exec, JSObject*, const List& args) |
| { |
| puts(args[0]->toString(exec).ascii()); |
| return jsUndefined(); |
| } |
| #endif |
| |
| // ------------------------------ PrototypeFunction ------------------------------- |
| |
| PrototypeFunction::PrototypeFunction(ExecState* exec, int len, const Identifier& name, JSMemberFunction function) |
| : InternalFunctionImp(exec->lexicalGlobalObject()->functionPrototype(), name) |
| , m_function(function) |
| { |
| ASSERT_ARG(function, function); |
| putDirect(exec->propertyNames().length, jsNumber(len), DontDelete | ReadOnly | DontEnum); |
| } |
| |
| PrototypeFunction::PrototypeFunction(ExecState* exec, FunctionPrototype* functionPrototype, int len, const Identifier& name, JSMemberFunction function) |
| : InternalFunctionImp(functionPrototype, name) |
| , m_function(function) |
| { |
| ASSERT_ARG(function, function); |
| putDirect(exec->propertyNames().length, jsNumber(len), DontDelete | ReadOnly | DontEnum); |
| } |
| |
| JSValue* PrototypeFunction::callAsFunction(ExecState* exec, JSObject* thisObj, const List& args) |
| { |
| return m_function(exec, thisObj, args); |
| } |
| |
| } // namespace KJS |