DOS ain't dead

Snappy compression (Announce)

posted by mceric, Germany, 08.02.2025, 01:04

Hi ECM,

> > https://en.wikipedia.org/wiki/Snappy_(compression) is a fast LZ style
> > algorithm without bitstrings.
>
> I have a Snappy depacker in inicomp already:
> https://hg.pushbx.org/ecm/inicomp/file/536526f7c49c/snappy.asm

I was curious about the binary size of that, but neither NASM nor the TASM mode of YASM want to assemble it, so I just have to ask you how big your Snappy depacker is

The unpacker also seems to rely on normalise_dssi_pointer, ..._both_pointers, ...pointer_with_displacement_bxcx, pointer_to_linear, check_pointers_not_overlapping, disp_al, disp_al_counter and disp_al_for_progress to be provided elsewhere.

And while I am at it, how much RAM does it need? Apparently just the output buffer and less than 40 bytes of stack "lvars"?

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FreeDOS / DOSEMU2 / ...

Complete thread:

• lDebug release 9 - ecm, 21.12.2024, 13:49 (Announce)
  • lDebug release 9 - Heatshrink compressed drives? - mceric, 21.12.2024, 16:00
    • lDebug release 9 - Heatshrink compressed drives? - ecm, 21.12.2024, 18:41
      • lDebug release 9 - Heatshrink compressed drives? - mceric, 21.12.2024, 22:55
    • lDebug release 9 - Heatshrink compressed drives? - DosWorld, 02.01.2025, 18:24
    • lDebug release 9 - Heatshrink compressed drives? - jadoxa, 29.01.2025, 08:46
      • Heatshrink compressed drives? - Tamp ISO compression test - mceric, 30.01.2025, 02:21
        • Heatshrink compressed drives? - Tamp ISO compression test - tom, 30.01.2025, 17:36
        • Heatshrink compressed drives? - Tamp ISO compression test - jadoxa, 31.01.2025, 09:24
          • Heatshrink compressed drives? - Tamp ISO compression test - mceric, 31.01.2025, 15:15
            • Heatshrink compressed drives? - Tamp ISO compression test - mceric, 31.01.2025, 23:33
              • Heatshrink compressed drives? - Tamp ISO compression test - tom, 01.02.2025, 11:19
                • Heatshrink compressed drives? - Tamp ISO compression test - mceric, 01.02.2025, 13:54
                  • Heatshrink compressed drives? - Tamp ISO compression test - jadoxa, 01.02.2025, 15:33
              • Heatshrink compressed drives? - Tamp ISO compression test - mceric, 06.02.2025, 02:42
                • Snappy compression - ecm, 06.02.2025, 04:26
                  • Snappy compression - mceric, 08.02.2025, 01:04
                    • Snappy compression - script to build a compressed executable - ecm, 08.02.2025, 18:02
                      • Snappy compression - script to build a compressed executable - ecm, 09.02.2025, 21:38
          • Heatshrink compressed drives? - Tamp ISO compression test - tom, 31.01.2025, 17:42
      • lDebug release 9 - Heatshrink compressed drives? - Oso2k, 30.01.2025, 05:12