Function decodeZstandardFrameArrayList [src]

Decode a Zstandard from from src and return number of bytes read; see decodeZstandardFrame(). The first four bytes of src must be the magic number for a Zstandard frame. Errors returned: error.WindowSizeUnknown if the frame does not have a valid window size error.WindowTooLarge if the window size is larger than window_size_max error.DictionaryIdFlagUnsupported if the frame uses a dictionary error.ContentSizeTooLarge if the frame header indicates a content size that is larger than std.math.maxInt(usize) error.ChecksumFailure if verify_checksum is true and the frame contains a checksum that does not match the checksum of the decompressed data error.ReservedBitSet if the reserved bit of the frame header is set error.EndOfStream if src does not contain a complete frame error.OutOfMemory if allocator cannot allocate enough memory an error in block.Error if there are errors decoding a block error.BadContentSize if the content size declared by the frame does not equal the size of decompressed data

Prototype

 pub fn decodeZstandardFrameArrayList( allocator: Allocator, dest: *std.ArrayList(u8), src: []const u8, verify_checksum: bool, window_size_max: usize, ) (error{OutOfMemory} || FrameContext.Error || FrameError)!usize

Parameters

allocator: Allocatordest: *std.ArrayList(u8)src: []const u8verify_checksum: boolwindow_size_max: usize

Source

  pub fn decodeZstandardFrameArrayList(
    allocator: Allocator,
    dest: *std.ArrayList(u8),
    src: []const u8,
    verify_checksum: bool,
    window_size_max: usize,
) (error{OutOfMemory} || FrameContext.Error || FrameError)!usize {
    assert(std.mem.readInt(u32, src[0..4], .little) == frame.Zstandard.magic_number);
    var consumed_count: usize = 4;

    var frame_context = context: {
        var fbs = std.io.fixedBufferStream(src[consumed_count..]);
        const source = fbs.reader();
        const frame_header = try decodeZstandardHeader(source);
        consumed_count += fbs.pos;
        break :context try FrameContext.init(frame_header, window_size_max, verify_checksum);
    };

    consumed_count += try decodeZstandardFrameBlocksArrayList(
        allocator,
        dest,
        src[consumed_count..],
        &frame_context,
    );
    return consumed_count;
}  