mirror of
https://github.com/RetroPortingToolKit/psxrecomp
synced 2026-10-26 02:11:36 -04:00
Matthew Stanley
905b52da57
A persisted option value outside its declared [min,max] is now REJECTED at load (the game's own default is used instead), so a corrupt/stale options file can no longer inject an out-of-range value into a config global the game may use as a jump-table index (wild jump = softlock). Ranges declared per option in game_options.toml (min/max; absent => no validation, e.g. signed screen offsets). Adds a format_version header (newer-than-known files are rejected wholesale). Restore stays name-keyed (offset-drift-safe). Runtime-only, no regen. Validated: corrupt values rejected (defaults applied); valid file restores intact. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
55 lines
2.6 KiB
C
55 lines
2.6 KiB
C
/* game_options.h — persist in-RAM game config globals across launches.
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*
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* Some PS1 games (e.g. Tomba!) keep their OPTION-screen settings only in a RAM
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* global that re-initialises to defaults every boot, with no memory-card config
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* block — so the player must re-set them each launch (issue #5). This module
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* persists a game-declared set of those globals to a small state file next to
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* the runtime exe: it restores them shortly after boot (once the game's own
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* config-init has run) and writes them back whenever they change.
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*
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* The fields are declared per-game in game.toml ([persist_options]); the
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* addresses are guest RAM addresses (KUSEG 0x80xxxxxx) of the canonical config
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* globals (pinned via consumer RE / option-screen write capture). Generic: any
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* game can list its own. Runtime-only, no debug server, works in release.
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*/
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#pragma once
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#include <stdint.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* Configure the persisted-options set. addrs/sizes/names/vmins/vmaxs have
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* `count` entries (size is 1 or 2 bytes per field); names[i] is the field key
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* written to the state file. vmins[i]/vmaxs[i] are the inclusive valid range for
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* RESTORE-time validation: a saved value outside [vmin,vmax] is rejected (the
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* game default is used) so a corrupt/stale file can't inject an out-of-range
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* value. Pass [INT32_MIN, INT32_MAX] for a field that needs no validation.
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* state_path is the absolute file to persist into. Copies what it needs; safe
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* to call once at startup. count==0 disables the feature. */
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void game_options_configure(const char *state_path,
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const uint32_t *addrs,
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const uint8_t *sizes,
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const char *const *names,
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const int32_t *vmins,
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const int32_t *vmaxs,
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int count);
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/* Recompiler hook (called from generated code at each config global's boot-init
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* store): returns the persisted value for `addr` if one was loaded, else `val`
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* unchanged. This is what performs restore-at-init. */
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int psx_game_option_store(uint32_t addr, int val);
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/* Persist the current option globals to the state file. Registered via atexit,
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* so a clean exit saves whatever the player last chose in the OPTION screen. */
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void game_options_save_now(void);
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/* Diagnostics: write a JSON object describing the module state (configured
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* fields, whether the state file loaded, per-field loaded/current/released).
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* Returns bytes written. For the debug server only. */
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int game_options_debug_json(char *out, int cap);
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#ifdef __cplusplus
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}
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#endif
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