Compressed Formats Writing Temporary Files to Disk

[0x90shell]

Currently, compressed formats will have temporary files extracted to disk, even if the load in memory core settings are used. This is due to the core setting "need_fullpath" being set to "true."

In June 2021, RA 1.9.5 added per file extension "need_fullpath" overrides to the API. If there is a reason this cannot be set to false for specific files (bin/cue, chd, etc), the "RETRO_ENVIRONMENT_SET_CONTENT_INFO_OVERRIDE" function can be utilized. Additionally, the "RETRO_ENVIRONMENT_GET_GAME_INFO_EXT" function can be utilized to obtain the metadata for compressed formats to find the underlying ROM extension.

By setting "need_fullpath" to false by default, compressed ROM files can be loaded directly into memory rather than extracting temporary copies to disk. This also allows soft-patching and run ahead to be utilized more efficiently. For reference, this functionality was added in the 2 other libretro PCE cores already.

References:
libretro/RetroArch#12473
libretro/beetle-pce-fast-libretro#189
libretro/beetle-pce-libretro#26
https://www.libretro.com/index.php/retroarch-1-9-5-released/

[negativeExponent]

this should be fixed when PR gets merged....