ssize_t nghttp2_hd_deflate_hd_vec(nghttp2_hd_deflater *deflater, const nghttp2_vec *vec, size_t veclen, const nghttp2_nv *nva, size_t nvlen)
Deflates the nva, which has the nvlen name/value pairs, into the veclen size of buf vector vec. The each size of buffer must be set in len field of
nghttp2_vec. If and only if one chunk is filled up completely, next chunk will be used. If vec is not large enough to store the deflated header block, this function fails with
nghttp2_error.NGHTTP2_ERR_INSUFF_BUFSIZE. The caller should use
nghttp2_hd_deflate_bound()to know the upper bound of buffer size required to deflate given header name/value pairs.
Once this function fails, subsequent call of this function always returns
After this function returns, it is safe to delete the nva.
This function returns the number of bytes written to vec if it succeeds, or one of the following negative error codes: