Serializes the SETTINGS values |iv| in the |buf|. The size of the
|buf| is specified by |buflen|. The number of entries in the |iv|
array is given by |niv|. The required space in |buf| for the |niv|
entries is 8*niv bytes and if the given buffer is too small, an
error is returned. This function is used mainly for creating a
SETTINGS payload to be sent with the HTTP2-Settings header
field in an HTTP Upgrade request. The data written in |buf| is NOT
base64url encoded and the application is responsible for encoding.
This function returns the number of bytes written in |buf|, or one
of the following negative error codes:
@function
Serializes the SETTINGS values |iv| in the |buf|. The size of the |buf| is specified by |buflen|. The number of entries in the |iv| array is given by |niv|. The required space in |buf| for the |niv| entries is 8*niv bytes and if the given buffer is too small, an error is returned. This function is used mainly for creating a SETTINGS payload to be sent with the HTTP2-Settings header field in an HTTP Upgrade request. The data written in |buf| is NOT base64url encoded and the application is responsible for encoding.
This function returns the number of bytes written in |buf|, or one of the following negative error codes:
ErrorCode.INVALID_ARGUMENT The |iv| contains duplicate settings ID or invalid value.
ErrorCode.INSUFF_BUFSIZE The provided |buflen| size is too small to hold the output.