API/JSScriptRef.cpp

   1 /*
   2  * Copyright (C) 2012 Apple Inc. All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  * 1. Redistributions of source code must retain the above copyright
   8  *    notice, this list of conditions and the following disclaimer.
   9  * 2. Redistributions in binary form must reproduce the above copyright
  10  *    notice, this list of conditions and the following disclaimer in the
  11  *    documentation and/or other materials provided with the distribution.
  12  *
  13  * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
  14  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  15  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  16  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
  17  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  18  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  19  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  20  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  21  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  22  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
  23  * THE POSSIBILITY OF SUCH DAMAGE.
  24  */
  25
  26 #include "config.h"
  27
  28 #include "APICast.h"
  29 #include "Completion.h"
  30 #include "JSBasePrivate.h"
  31 #include "VM.h"
  32 #include "JSScriptRefPrivate.h"
  33 #include "OpaqueJSString.h"
  34 #include "JSCInlines.h"
  35 #include "Parser.h"
  36 #include "SourceCode.h"
  37 #include "SourceProvider.h"
  38
  39 using namespace JSC;
  40
  41 struct OpaqueJSScript : public SourceProvider {
  42 public:
  43     static WTF::PassRefPtr<OpaqueJSScript> create(VM* vm, const String& url, int startingLineNumber, const String& source)
  44     {
  45         return WTF::adoptRef(new OpaqueJSScript(vm, url, startingLineNumber, source));
  46     }
  47
  48     virtual const String& source() const override
  49     {
  50         return m_source;
  51     }
  52
  53     VM* vm() const { return m_vm; }
  54
  55 private:
  56     OpaqueJSScript(VM* vm, const String& url, int startingLineNumber, const String& source)
  57         : SourceProvider(url, TextPosition(OrdinalNumber::fromOneBasedInt(startingLineNumber), OrdinalNumber::first()))
  58         , m_vm(vm)
  59         , m_source(source)
  60     {
  61     }
  62
  63     virtual ~OpaqueJSScript() { }
  64
  65     VM* m_vm;
  66     String m_source;
  67 };
  68
  69 static bool parseScript(VM* vm, const SourceCode& source, ParserError& error)
  70 {
  71     return JSC::parse<JSC::ProgramNode>(vm, source, 0, Identifier(), JSParseNormal, JSParseProgramCode, error);
  72 }
  73
  74 extern "C" {
  75
  76 JSScriptRef JSScriptCreateReferencingImmortalASCIIText(JSContextGroupRef contextGroup, JSStringRef url, int startingLineNumber, const char* source, size_t length, JSStringRef* errorMessage, int* errorLine)
  77 {
  78     VM* vm = toJS(contextGroup);
  79     JSLockHolder locker(vm);
  80     for (size_t i = 0; i < length; i++) {
  81         if (!isASCII(source[i]))
  82             return 0;
  83     }
  84
  85     startingLineNumber = std::max(1, startingLineNumber);
  86
  87     RefPtr<OpaqueJSScript> result = OpaqueJSScript::create(vm, url->string(), startingLineNumber, String(StringImpl::createFromLiteral(source, length)));
  88
  89     ParserError error;
  90     if (!parseScript(vm, SourceCode(result), error)) {
  91         if (errorMessage)
  92             *errorMessage = OpaqueJSString::create(error.m_message).leakRef();
  93         if (errorLine)
  94             *errorLine = error.m_line;
  95         return 0;
  96     }
  97
  98     return result.release().leakRef();
  99 }
 100
 101 JSScriptRef JSScriptCreateFromString(JSContextGroupRef contextGroup, JSStringRef url, int startingLineNumber, JSStringRef source, JSStringRef* errorMessage, int* errorLine)
 102 {
 103     VM* vm = toJS(contextGroup);
 104     JSLockHolder locker(vm);
 105
 106     startingLineNumber = std::max(1, startingLineNumber);
 107
 108     RefPtr<OpaqueJSScript> result = OpaqueJSScript::create(vm, url->string(), startingLineNumber, source->string());
 109
 110     ParserError error;
 111     if (!parseScript(vm, SourceCode(result), error)) {
 112         if (errorMessage)
 113             *errorMessage = OpaqueJSString::create(error.m_message).leakRef();
 114         if (errorLine)
 115             *errorLine = error.m_line;
 116         return 0;
 117     }
 118
 119     return result.release().leakRef();
 120 }
 121
 122 void JSScriptRetain(JSScriptRef script)
 123 {
 124     JSLockHolder locker(script->vm());
 125     script->ref();
 126 }
 127
 128 void JSScriptRelease(JSScriptRef script)
 129 {
 130     JSLockHolder locker(script->vm());
 131     script->deref();
 132 }
 133
 134 JSValueRef JSScriptEvaluate(JSContextRef context, JSScriptRef script, JSValueRef thisValueRef, JSValueRef* exception)
 135 {
 136     ExecState* exec = toJS(context);
 137     JSLockHolder locker(exec);
 138     if (script->vm() != &exec->vm()) {
 139         RELEASE_ASSERT_NOT_REACHED();
 140         return 0;
 141     }
 142     JSValue internalException;
 143     JSValue thisValue = thisValueRef ? toJS(exec, thisValueRef) : jsUndefined();
 144     JSValue result = evaluate(exec, SourceCode(script), thisValue, &internalException);
 145     if (internalException) {
 146         if (exception)
 147             *exception = toRef(exec, internalException);
 148         return 0;
 149     }
 150     ASSERT(result);
 151     return toRef(exec, result);
 152 }
 153
 154 }