when encountering a non-integer value, napi_get_value_int32 raises an exception instead of truncating the number

[mmomtchev]

The original napi_get_value_int32 truncates floating point numbers while the emnapi version raises an exception.

I think this applies to all integer handling in emnapi.

nodejs/node-addon-api#578

[mmomtchev]

I think that this happens only with emscripten

[mmomtchev]

This seems to be an emscripten issue when using ASSERTIONS=2

emscripten-core/emscripten#19655

[toyobayashi]

Thanks to your investigation, I'll take a look later

[mmomtchev]

There is an old JavaScript trick that is ~~value (double not), it has the effect of truncating value without (almost) any performance impact, however it does not work for 64 bit values.