Components for compressing object code
Date/Time of Processing: Monday 30 May 1994 01:42:05Pm Overall Assessment of System: OK Classification of System: A Basis of Classification -- Syntax Errors PASS Completeness PASS Independence from External Libraries PASS Independence from a Specific Ada Compiler PASS Number of ... Files 22 Library Units 22 Lines 3437 Statements 1167 Comments 266
languages/ada/swcomps/occ: File Name Size --------- ---- README 909 occ.zip 35,425 Totals ============== ============== 2 Files 36,334
ASSET_A_467: Object Code Compression Algorithm The main procedures in this compilation closure demonstrate the ability to compress streams of byte (or word) data without loss of bits. The main attribute of this scheme is that the decompression phase is very fast, and does not require any additional buffer space or table space. This makes it well suited for certain situations such as compressing code in ROM for decompression into RAM before execution, where the ROM is a limited resource. The compression/decompression algorithm is based on the replacement of matching patterns within the stream with special marker tokens that reference a prior occurrence of the pattern. This capability was originally developed to demonstrate the feasibility of compressing MIL-STD-1750A object code in ROM within a space-borne computer. Compression ratios from 1.3 to 2.0 have been achieved.
15 March 1993 Bruce A Petrick Initial release to ASSET 11 December 1993 ASSET Initial release to the PAL
This prologue must be included in all copies of this software. Restrictions on use or distribution: NONE
This software and its documentation are provided "AS IS" and without any expressed or implied warranties whatsoever. No warranties as to performance, merchantability, or fitness for a particular purpose exist. The user is advised to test the software thoroughly before relying on it. The user must assume the entire risk and liability of using this software. In no event shall any person or organization of people be held responsible for any direct, indirect, consequential or inconsequential damages or lost profits.