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 "APIShims.h"
30#include "Completion.h"
31#include "JSBasePrivate.h"
32#include "VM.h"
33#include "JSScriptRefPrivate.h"
34#include "OpaqueJSString.h"
35#include "Operations.h"
36#include "Parser.h"
37#include "SourceCode.h"
38#include "SourceProvider.h"
39
40using namespace JSC;
41
42struct OpaqueJSScript : public SourceProvider {
43public:
44    static WTF::PassRefPtr<OpaqueJSScript> create(VM* vm, const String& url, int startingLineNumber, const String& source)
45    {
46        return WTF::adoptRef(new OpaqueJSScript(vm, url, startingLineNumber, source));
47    }
48
49    const String& source() const OVERRIDE
50    {
51        return m_source;
52    }
53
54    VM* vm() const { return m_vm; }
55
56private:
57    OpaqueJSScript(VM* vm, const String& url, int startingLineNumber, const String& source)
58        : SourceProvider(url, TextPosition(OrdinalNumber::fromOneBasedInt(startingLineNumber), OrdinalNumber::first()))
59        , m_vm(vm)
60        , m_source(source)
61    {
62    }
63
64    ~OpaqueJSScript() { }
65
66    VM* m_vm;
67    String m_source;
68};
69
70static bool parseScript(VM* vm, const SourceCode& source, ParserError& error)
71{
72    return JSC::parse<JSC::ProgramNode>(vm, source, 0, Identifier(), JSParseNormal, JSParseProgramCode, error);
73}
74
75extern "C" {
76
77JSScriptRef JSScriptCreateReferencingImmortalASCIIText(JSContextGroupRef contextGroup, JSStringRef url, int startingLineNumber, const char* source, size_t length, JSStringRef* errorMessage, int* errorLine)
78{
79    VM* vm = toJS(contextGroup);
80    APIEntryShim entryShim(vm);
81    for (size_t i = 0; i < length; i++) {
82        if (!isASCII(source[i]))
83            return 0;
84    }
85
86    RefPtr<OpaqueJSScript> result = OpaqueJSScript::create(vm, url->string(), startingLineNumber, String(StringImpl::createFromLiteral(source, length)));
87
88    ParserError error;
89    if (!parseScript(vm, SourceCode(result), error)) {
90        if (errorMessage)
91            *errorMessage = OpaqueJSString::create(error.m_message).leakRef();
92        if (errorLine)
93            *errorLine = error.m_line;
94        return 0;
95    }
96
97    return result.release().leakRef();
98}
99
100JSScriptRef JSScriptCreateFromString(JSContextGroupRef contextGroup, JSStringRef url, int startingLineNumber, JSStringRef source, JSStringRef* errorMessage, int* errorLine)
101{
102    VM* vm = toJS(contextGroup);
103    APIEntryShim entryShim(vm);
104
105    RefPtr<OpaqueJSScript> result = OpaqueJSScript::create(vm, url->string(), startingLineNumber, source->string());
106
107    ParserError error;
108    if (!parseScript(vm, SourceCode(result), error)) {
109        if (errorMessage)
110            *errorMessage = OpaqueJSString::create(error.m_message).leakRef();
111        if (errorLine)
112            *errorLine = error.m_line;
113        return 0;
114    }
115
116    return result.release().leakRef();
117}
118
119void JSScriptRetain(JSScriptRef script)
120{
121    APIEntryShim entryShim(script->vm());
122    script->ref();
123}
124
125void JSScriptRelease(JSScriptRef script)
126{
127    APIEntryShim entryShim(script->vm());
128    script->deref();
129}
130
131JSValueRef JSScriptEvaluate(JSContextRef context, JSScriptRef script, JSValueRef thisValueRef, JSValueRef* exception)
132{
133    ExecState* exec = toJS(context);
134    APIEntryShim entryShim(exec);
135    if (script->vm() != &exec->vm()) {
136        RELEASE_ASSERT_NOT_REACHED();
137        return 0;
138    }
139    JSValue internalException;
140    JSValue thisValue = thisValueRef ? toJS(exec, thisValueRef) : jsUndefined();
141    JSValue result = evaluate(exec, SourceCode(script), thisValue, &internalException);
142    if (internalException) {
143        if (exception)
144            *exception = toRef(exec, internalException);
145        return 0;
146    }
147    ASSERT(result);
148    return toRef(exec, result);
149}
150
151}
152