Linux/MacOS create function with return sample

[haojingus]

`//------------------------------------------------------------------------------------------------------- // Author:HAO Jing // Licensed under the MIT license. See LICENSE file in the project root for full license information. //-------------------------------------------------------------------------------------------------------

include "ChakraCore.h"

include "ChakraCommon.h"

include

include

include

include

include

define FAIL_CHECK(cmd) \

do                                      \
{                                       \
    JsErrorCode errCode = cmd;          \
    if (errCode != JsNoError)           \
    {                                   \
        printf("Error %d at '%s'\n",    \
            errCode, #cmd);             \
        return 1;                       \
    }                                   \
} while(0)

using namespace std; JsValueRef CHAKRA_CALLBACK JSHello(JsValueRef caller,bool isConstructCall,JsValueRef arguments,unsigned short argumentCount,void callbackState); JsValueRef CHAKRA_CALLBACK JSLogCB(JsValueRef caller,bool isConstructCall,JsValueRef arguments,unsigned short argumentCount,void callbackState);

void setCallback(JsValueRef object,const char propertyName,JsNativeFunction callback,void* callbackState); //int x =1; int main() { JsRuntimeHandle runtime; JsContextRef context; JsValueRef result; unsigned currentSourceContext = 0;

// Your script; try replace hello-world with something else
//const char* script = "(()=>{return \'Hello World!\';})()";
const char* script = "logCB(hello(1,2));";
// Create a runtime.
FAIL_CHECK(JsCreateRuntime(JsRuntimeAttributeNone, nullptr, &runtime));

// Create an execution context.
FAIL_CHECK(JsCreateContext(runtime, &context));

// Now set the current execution context.
FAIL_CHECK(JsSetCurrentContext(context));
JsValueRef globalObj;
JsGetGlobalObject(&globalObj);
setCallback(&globalObj, "hello", JSHello, nullptr);
setCallback(&globalObj, "logCB", JSLogCB, nullptr);
//JsSetCurrentContext(context);
JsValueRef scriptSource;
JsCreateString(script, strlen(script), &scriptSource);
//JsCreateExternalArrayBuffer((void*)script, (unsigned int)strlen(script), nullptr, nullptr, &scriptSource);
JsValueRef fname;
FAIL_CHECK(JsCreateString("sample", strlen("sample"), &fname));

JsRun(scriptSource, currentSourceContext++, fname, JsParseScriptAttributeNone, &result);

// Dispose runtime
FAIL_CHECK(JsSetCurrentContext(JS_INVALID_REFERENCE));
FAIL_CHECK(JsDisposeRuntime(runtime));
std::cout<<"host end!"<<std::endl;
return 0;

}

JsValueRef CHAKRA_CALLBACK JSLogCB(JsValueRef caller,bool isConstructCall,JsValueRef arguments,unsigned short argumentCount,void callbackState) { cout<<argumentCount<<endl; char* buff = nullptr; JsValueRef strMsg; JsConvertValueToString(arguments[1], &strMsg); size_t length; JsCopyString(strMsg, buff, 0, &length); buff = new char[length+1]; JsCopyString(strMsg, buff, length+1, nullptr); cout<<buff<<endl; return JS_INVALID_REFERENCE; }

JsValueRef CHAKRA_CALLBACK JSHello(JsValueRef caller,bool isConstructCall,JsValueRef arguments,unsigned short argumentCount,void callbackState) { //return JS_INVALID_REFERENCE; //JsValueRef ret = JS_INVALID_REFERENCE; double x,y,z; JsNumberToDouble(arguments[1], &x); JsNumberToDouble(arguments[2], &y); z = x+y; JsValueRef ret; const char* msg = "return"; JsCreateString(msg, strlen(msg), &ret); std::cout<<"this is a native function"<<std::endl; return ret; //return ret; }

void setCallback(JsValueRef object,const char propertyName,JsNativeFunction callback,void* callbackState) {

JsPropertyIdRef propertyId;
JsCreatePropertyId(propertyName, strlen(propertyName), &propertyId);
JsValueRef function;
JsCreateFunction(callback, callbackState, &function);
JsSetProperty(*object, propertyId, function, true);

}

`