[node-api]: New variant napi_set_named_property that treats '\0' as values.

[hyf0]

What is the problem this feature will solve?

I'm developing rolldown, rust version of rollup. Rollup use \0 as the virtual module name convention.

If your plugin uses 'virtual modules' (e.g. for helper functions), prefix the module ID with \0. This prevents other plugins from trying to process it. link

Rolldown follows this convention and got problems while using napi_set_named_property. napi_set_named_property considers \0 as the terminator rather than values. This makes passing "\0mvirtual-module" to Node using napi_set_named_property become "".

Related issues:

• Unexpect Nul Error of CString while creating javascript object napi-rs/napi-rs#2110
• NAPI-RS throwing Nul Error while dealing with virtual modules rolldown/rolldown#1115

What is the feature you are proposing to solve the problem?

So I propose a new variant napi_set_named_property, maybe call ``napi_set_named_property_len`, which will receive string and the length. This way, it could treat '\0' as values.

For alignment, If this request is accepted, I guess napi_get_named_property need a new variant too.

What alternatives have you considered?

I'm using workaround said in rolldown/rolldown#1115 (comment). Create JsString first, then using napi_set_property. But this cause extra napi calls and it's really not good for a bundler that address speed.

[legendecas]

If the property keys are definite, creating property keys with node_api_create_property_key_utf16 beforehand and reuse the created keys in napi_set_property could helps.

[hyf0]

If the property keys are definite, creating property keys with node_api_create_property_key_utf16 beforehand and reuse the created keys in napi_set_property could helps.

Thanks for the solution. I'm using the workaround like it, but still there is an extra napi call of node_api_create_property_key_utf16.

[mertcanaltin]

I tried to make a quick improvement for this place @hyf0 @legendecas