Reading, fix writing, monocommit

1 files changed, 8 insertions, 1 deletions

diff --git a/src/lib.rs b/src/lib.rs
index 83b0b77..6c0203c 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -3,13 +3,20 @@ mod gif;
 mod lzw;
 
 pub mod block;
+pub mod reader;
 pub mod writer;
 
 pub use color::Color;
 pub use gif::Gif;
 pub use lzw::LZW;
 
+/// Perform the algorithm to get the length of a color table from
+/// the value of the packed field. The max value here is 256
+pub(crate) fn packed_to_color_table_length(packed: u8) -> usize {
+    2usize.pow(packed as u32 + 1)
+}
+
 //TODO: Be sure to check that fields in LSD and Img. Desc. that were reserved
 //in 87a aren't set if version is 87a, or that we return a warning, etc. Just
 //remember about this.
-//bottom of page 24 in 89a
\ No newline at end of file
+//bottom of page 24 in 89a