Function mozjs::jsapi::JS_EncodeStringToBuffer

pub unsafe extern "C" fn JS_EncodeStringToBuffer(
    cx: *mut JSContext,
    str_: *mut JSString,
    buffer: *mut i8,
    length: usize,
) -> bool

Encode string into a buffer. The function does not stores an additional zero byte. The function returns (size_t) -1 if the string can not be encoded into bytes with no error reported. Otherwise it returns the number of bytes that are necessary to encode the string. If that exceeds the length parameter, the string will be cut and only length bytes will be written into the buffer.