libretro / libretro/RetroArch

(DB) Header Skip Support for the Scanner

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#10,042 2 comments 0 reactions 0 assignees View on GitHub

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bug: scanner databases
Dominant language
C
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Merged PRs (30d)
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Description

Scanning NES, FDS, 7800, and Lynx in particular comes with some headaches due to the necessity of headers on those systems. Current no-intro dats contain headerless checksums with the expectation that a header skipper will be used. Given the fairly limited count of systems and unlikelihood of the issue arising on others, could header skippers be supported, and preferably just be included and auto-triggered on specific extensions?

NES header skipper example, as provided by no-intro

In the case of clrmamepro, header skippers are also used to swap endianness, but I'm not sure that part is of interest for retroarch.

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First steps

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Research direction

No implementation files, tests, or entry points are named. Start by locating RetroArch's database scanner and reviewing how system extensions are selected, then compare the linked NES header-skipper example; done means the requested systems can use supported header skippers with automatic triggering where specified.

Written by the indexing model from the issue text.

Assessment

Tech stack
c
Domain
tooling
Issue type
Feature
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
30/100

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