Function decodeFrameHeader [src]

Returns the header of the frame at the beginning of source. Errors returned: error.BadMagic if source begins with bytes not equal to the Zstandard frame magic number, or outside the range of magic numbers for skippable frames. error.EndOfStream if source contains fewer than 4 bytes error.ReservedBitSet if the frame is a Zstandard frame and any of the reserved bits are set

Prototype

pub fn decodeFrameHeader(source: anytype) (@TypeOf(source).Error || HeaderError)!FrameHeader

Source

  pub fn decodeFrameHeader(source: anytype) (@TypeOf(source).Error || HeaderError)!FrameHeader {
    const magic = try source.readInt(u32, .little);
    const frame_type = try frameType(magic);
    switch (frame_type) {
        .zstandard => return FrameHeader{ .zstandard = try decodeZstandardHeader(source) },
        .skippable => return FrameHeader{
            .skippable = .{
                .magic_number = magic,
                .frame_size = try source.readInt(u32, .little),
            },
        },
    }
}  