node-addon-helper

Some tool functions simplify the development of node addon.

Setup

$3

Add include directories to your CMakeLists.txt

``cmake
execute_process(COMMAND node -p "require('node-addon-helper').include"
WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
OUTPUT_VARIABLE NODE_ADDON_HELPER_DIR
)

string(REPLACE "\n" "" NODE_ADDON_HELPER_DIR ${NODE_ADDON_HELPER_DIR})
string(REPLACE "\"" "" NODE_ADDON_HELPER_DIR ${NODE_ADDON_HELPER_DIR})

target_include_directories(${PROJECT_NAME} PRIVATE ${NODE_ADDON_HELPER_DIR})
`

Usage

Look ./test/ for all usage.

$3

`c++
// test/type_converter.cpp

#include

template
Napi::Value ExportConvertToT(const Napi::CallbackInfo& info) {
return Nhelper::TypeConverter::ToJSValue(
info.Env(), Nhelper::TypeConverter::ToNativeValue(info[0]));
}

Napi::Object InitAll(Napi::Env env, Napi::Object exports) {
exports.Set("convertBool",
Napi::Function::New(env, ExportConvertToT));
}

`

`js
// test/type_converter.test.js
assert.equal(typeConverter.convertBool(true), true);
assert.equal(typeConverter.convertBool(false), false);
`

| c++ | js | predicate |
|--------------------------------|-------------------------------------|-------------------------------------|
| bool | Boolean | true/false |
| int8\_t | Number | INT8\_MIN - INT8\_MAX |
| uint8\_t | Number | UINT8\_MIN - UINT8\_MAX |
| int16\_t | Number | INT16\_MIN - INT16\_MAX |
| uint16\_t | Number | UINT16\_MIN - UINT16\_MAX |
| int32\_t | Number | INT32\_MIN - INT32\_MAX |
| uint32\_t | Number | UINT32\_MIN - UINT32\_MAX |
| int64\_t | Number | INT64\_MIN - INT64\_MAX |
| float | Number | |
| double | Number | |
| std::string | Number | |
| std::vector | Array/ArrayBuffer/Buffer/TypedArray | T is integral and float\_point |
| std::vector | Array | T not is integral and float\_point |
| std::pair | ArrayBuffer/Buffer/TypedArray | pointer of buffer's data and length |

$3

check info length
`c++
// test/args_check.cpp
#include "nhelper/args_check.h"
Napi::Value ExportCheckInfoLength(const Napi::CallbackInfo& info) {
constexpr size_t length = 4;
Nhelper::CheckInfoLength(info, length);
return info.Env().Null();
}

`

check info's args type
`c++
// test/args_check.cpp
template
Napi::Value ExportCheckInfoType(const Napi::CallbackInfo& info) {
Nhelper::CheckInfoType(info, 0);
return info.Env().Null();
}

``

$3

Create an async api