Source
pub fn decodeZStandardFrameBlocks(
dest: []u8,
src: []const u8,
frame_context: *FrameContext,
) (error{ ContentTooLarge, UnknownContentSizeUnsupported } || FrameError)!ReadWriteCount {
const content_size = frame_context.content_size orelse
return error.UnknownContentSizeUnsupported;
if (dest.len < content_size) return error.ContentTooLarge;
var consumed_count: usize = 0;
const written_count = decodeFrameBlocksInner(
dest[0..content_size],
src[consumed_count..],
&consumed_count,
if (frame_context.hasher_opt) |*hasher| hasher else null,
frame_context.block_size_max,
) catch |err| switch (err) {
error.DestTooSmall => return error.BadContentSize,
inline else => |e| return e,
};
if (written_count != content_size) return error.BadContentSize;
if (frame_context.has_checksum) {
if (src.len < consumed_count + 4) return error.EndOfStream;
const checksum = std.mem.readInt(u32, src[consumed_count..][0..4], .little);
consumed_count += 4;
if (frame_context.hasher_opt) |*hasher| {
if (checksum != computeChecksum(hasher)) return error.ChecksumFailure;
}
}
return ReadWriteCount{ .read_count = consumed_count, .write_count = written_count };
}