Function libnghttp2_sys::nghttp2_check_header_value

pub unsafe extern "C" fn nghttp2_check_header_value(
    value: *const u8, 
    len: usize
) -> c_int

@function

Returns nonzero if HTTP header field value |value| of length |len| is valid according to http://tools.ietf.org/html/rfc7230#section-3.2