Write JavascriptString value into C string buffer (Utf8)

CHAKRA_API    JsCopyString(        _In_ JsValueRef value,        _Out_opt_ char* buffer,        _In_ size_t bufferSize,        _Out_opt_ size_t* length);

• value: JavascriptString value
• buffer: Pointer to buffer
• bufferSize: Buffer size
• length: Ifbuffer is non-null, then this will be the number of bytes written into the buffer. Ifbuffer is null, then this will be the number of bytes required to fit the full string.

The codeJsNoError if the operation succeeded, a failure code otherwise.

This API is experimental and may have breaking change later.

When size of thebuffer is unknown,buffer argument can be nullptr.In that case,length argument will return the length needed to accommodate all the UTF8 decoded bytes present invalue.Ifbuffer is non-null andbufferSize is too small to fit the full utf8 string, the process will abort.