#include <napi.h>
#include "Calculate.h"
Napi::Value Add(const Napi::CallbackInfo& info)
{
Napi::Env env = info.Env();
if (info.Length() < 2)
{
Napi::TypeError::New(env, "参数个数异常").ThrowAsJavaScriptException();
return env.Null(); // 返回JavaScript的null
}
if (!info[0].IsNumber() || !info[1].IsNumber())
{
Napi::TypeError::New(env, "参数类型异常").ThrowAsJavaScriptException();
return env.Null();
}
// Napi::Value -> Napi::Number
double arg0 = info[0].As<Napi::Number>().DoubleValue();
double arg1 = info[1].As<Napi::Number>().DoubleValue();
double sum = Calculate::add(arg0, arg1);
Napi::Number result = Napi::Number::New(env, sum);
return result;
}
void About(const Napi::CallbackInfo& info)
{
Napi::Env env = info.Env();
Napi::Function cb = info[0].As<Napi::Function>();
// C++中向JavaScript传过来的函数传递参数并执行它
cb.Call(env.Global(), { Napi::String::New(env, "这是一个计算类") });
}
Napi::Object Init(Napi::Env env, Napi::Object exports)
{
exports.Set(
Napi::String::New(env, "add"),
Napi::Function::New(env, Add)
);
exports.Set(
Napi::String::New(env, "about"),
Napi::Function::New(env, About)
);
return exports;
}
// 第一个参数为模块名称,与binding.gyp中target_name对应
NODE_API_MODULE(cal, Init);
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2023-11-01
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