Written in AT&T assembly responding to the Intel IA32 processor/IA32 ISA running Windows 7.

Approach

The designed run-length algorithm focuses on a simplified Portable Bitmap (PBM) binary image format.

Example of compression:

.pbm file to be compressed:

0x5031000F00020000000000000000000000000000000000000000000000000000000000FF

Resulting .rle file:

0x524C4549000F00020006001D000001FF

The decompression procedure works inversely.