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Sven Bergstr�m
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‎01 cli script/01 cli script.cpp‎

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/*
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01 - Command line script execution
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A simple primer to understanding the v8 workflow. This is not meant
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to do much more than print a result of a script execution. But, it
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does demonstrate how to create a global template, a context, and
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how the script file makes it's way from disk into the context.
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The scope of tutorial 1 is not to dig into those details, but a method
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of getting v8 running within minutes for you to mess around with.
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Common:
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What?
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A simple introduction to understanding the v8 javascript engine.
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Why?
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Written for the #altdevblog www.altdevblogaday.com group.
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Who?
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Written by Sven Bergström ( FuzzYspo0N ).
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Discussion :
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These examples will serve the simple purpose of demonstrating commonly
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asked questions with regards to v8 and the embedding of javascript
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into a c++ application.
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Disclaimer - I am no expert on v8. I just use it, and have hit the wall
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a number of times. Hopefully, anything I say will help you understand the
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mentality, concepts and structure of the v8 engine and how to use it based
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on the journey that I have travelled with the engine.
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For the full post and more info - see the following link -
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*/
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#include <iostream>
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#include "../v8/v8.h"
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#include "../common/common.h"
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using namespace v8;
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int main(int argc, char **argv)
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{
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//Quite simple, these are scope based 'managers'.
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//One protects threading issues, and one manages
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//the creation of JS handles, for clean up.
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Locker locker;
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HandleScope handle_scope;
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//Create a global object template. This can be stamped
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//repeatedly with little cost into new execution contexts.
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//Note the word template! It is a 'definition' of the context.
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//This is important to get - when you expose something into the
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//global object - it is an instance. When you expose something
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//onto the global template - ALL contexts can share the same
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//exposed values without needing to redo the expose process.
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Handle<ObjectTemplate> globalTemplate = ObjectTemplate::New();
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//A context is a fresh execution context. Take for example,
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//a browser tab or frame in Google Chrome. Each of these are
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//a new context, stamped with a global template, and created
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//on demand. When executing scripts, you can execute them in
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//and existing context by using the Context::context_scope
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//handlers. This 'switches' context for that execution period
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//In this case, we only need one new context.
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Handle<Context> context = Context::New( NULL, globalTemplate );
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//If we receive an argument, execute the script file
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if(argc > 1) {
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eScriptExecResult r = executeScript( std::string( argv[1] ) , context );
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} else {
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printf("Usage: <scriptname.js> \n Execute the javascript file.");
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}
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return 0;
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}

‎01 cli script/01 cli script.vcproj‎

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<?xml version="1.0" encoding="Windows-1252"?>
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<VisualStudioProject
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ProjectType="Visual C++"
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Version="9.00"
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Name="01 cli script"
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ProjectGUID="{3CC2EC44-62A5-4E63-B8C9-E5149563DF0D}"
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RootNamespace="v8example"
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Keyword="Win32Proj"
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TargetFrameworkVersion="196613"
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>
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<Platforms>
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<Platform
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Name="Win32"
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/>
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</Platforms>
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<ToolFiles>
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</ToolFiles>
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<Configurations>
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<Configuration
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Name="Debug|Win32"
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OutputDirectory="$(SolutionDir)$(ConfigurationName)"
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IntermediateDirectory="$(ConfigurationName)"
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ConfigurationType="1"
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CharacterSet="1"
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>
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<Tool
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Name="VCPreBuildEventTool"
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/>
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<Tool
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Name="VCCustomBuildTool"
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/>
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<Tool
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Name="VCXMLDataGeneratorTool"
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/>
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<Tool
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Name="VCWebServiceProxyGeneratorTool"
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/>
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<Tool
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Name="VCMIDLTool"
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/>
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<Tool
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Name="VCCLCompilerTool"
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Optimization="0"
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PreprocessorDefinitions="WIN32;_DEBUG;_CONSOLE;_CRT_SECURE_NO_WARNINGS"
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MinimalRebuild="true"
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BasicRuntimeChecks="3"
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RuntimeLibrary="1"
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UsePrecompiledHeader="0"
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WarningLevel="3"
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DebugInformationFormat="3"
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/>
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<Tool
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Name="VCManagedResourceCompilerTool"
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/>
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<Tool
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Name="VCResourceCompilerTool"
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/>
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<Tool
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Name="VCPreLinkEventTool"
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/>
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<Tool
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Name="VCLinkerTool"
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AdditionalDependencies="v8.lib WS2_32.lib Winmm.lib "
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OutputFile="../00 bin/$(ProjectName).exe"
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LinkIncremental="1"
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AdditionalLibraryDirectories="../v8/"
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GenerateDebugInformation="true"
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ProgramDatabaseFile="$(IntDir)$(TargetName).pdb"
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SubSystem="1"
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TargetMachine="1"
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/>
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<Tool
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Name="VCALinkTool"
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/>
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<Tool
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Name="VCManifestTool"
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/>
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<Tool
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Name="VCXDCMakeTool"
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/>
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<Tool
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Name="VCBscMakeTool"
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/>
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<Tool
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Name="VCFxCopTool"
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/>
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<Tool
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Name="VCAppVerifierTool"
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/>
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<Tool
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Name="VCPostBuildEventTool"
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/>
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</Configuration>
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<Configuration
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Name="Release|Win32"
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OutputDirectory="$(SolutionDir)$(ConfigurationName)"
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IntermediateDirectory="$(ConfigurationName)"
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ConfigurationType="1"
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CharacterSet="1"
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WholeProgramOptimization="1"
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>
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<Tool
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Name="VCPreBuildEventTool"
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/>
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<Tool
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Name="VCCustomBuildTool"
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/>
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<Tool
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Name="VCXMLDataGeneratorTool"
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/>
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<Tool
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Name="VCWebServiceProxyGeneratorTool"
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/>
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<Tool
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Name="VCMIDLTool"
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/>
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<Tool
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Name="VCCLCompilerTool"
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Optimization="2"
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EnableIntrinsicFunctions="true"
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PreprocessorDefinitions="WIN32;NDEBUG;_CONSOLE;_CRT_SECURE_NO_WARNINGS"
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RuntimeLibrary="0"
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EnableFunctionLevelLinking="true"
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UsePrecompiledHeader="0"
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WarningLevel="3"
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DebugInformationFormat="3"
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/>
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<Tool
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Name="VCManagedResourceCompilerTool"
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/>
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<Tool
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Name="VCResourceCompilerTool"
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/>
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<Tool
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Name="VCPreLinkEventTool"
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/>
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<Tool
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Name="VCLinkerTool"
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AdditionalDependencies="v8.lib WS2_32.lib Winmm.lib "
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OutputFile="../00 bin/$(ProjectName).exe"
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LinkIncremental="1"
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AdditionalLibraryDirectories="../v8/"
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GenerateDebugInformation="true"
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ProgramDatabaseFile="$(IntDir)$(TargetName).pdb"
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SubSystem="1"
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OptimizeReferences="2"
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EnableCOMDATFolding="2"
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TargetMachine="1"
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/>
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<Tool
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Name="VCALinkTool"
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/>
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<Tool
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Name="VCManifestTool"
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/>
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<Tool
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Name="VCXDCMakeTool"
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/>
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<Tool
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Name="VCBscMakeTool"
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/>
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<Tool
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Name="VCFxCopTool"
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/>
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<Tool
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Name="VCAppVerifierTool"
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/>
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<Tool
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Name="VCPostBuildEventTool"
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/>
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</Configuration>
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</Configurations>
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<References>
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</References>
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<Files>
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<Filter
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Name="v8"
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>
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<File
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RelativePath="..\v8\v8-debug.h"
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>
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</File>
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<File
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RelativePath="..\v8\v8-preparser.h"
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>
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</File>
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<File
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RelativePath="..\v8\v8-profiler.h"
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>
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</File>
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<File
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RelativePath="..\v8\v8-testing.h"
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>
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</File>
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<File
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RelativePath="..\v8\v8.h"
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>
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</File>
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<File
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RelativePath="..\v8\v8stdint.h"
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>
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</File>
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</Filter>
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<File
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RelativePath=".\01 cli script.cpp"
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>
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</File>
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</Files>
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<Globals>
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</Globals>
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</VisualStudioProject>

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