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filesystem: add utility function FS_CheckForQuakePak that parses Quake PAK file and looks for specific files in it's root

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Used to properly detect Quake game dirs.
This commit is contained in:
Alibek Omarov 2025-01-07 07:55:40 +03:00
parent 83b5edea88
commit ceb2b0c5e4
2 changed files with 45 additions and 0 deletions
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1
filesystem/filesystem_internal.h
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@ -230,6 +230,7 @@ qboolean FS_FullPathToRelativePath( char *dst, const char *src, size_t size );
//
// pak.c
//
qboolean FS_CheckForQuakePak( const char *pakfile, const char *files[], size_t num_files );
searchpath_t *FS_AddPak_Fullpath( const char *pakfile, int flags );
//

44
filesystem/pak.c
View file

@ -105,6 +105,8 @@ static pack_t *FS_LoadPackPAK( const char *packfile, int *error )
// TODO: use FS_Open to allow PK3 to be included into other archives
// Currently, it doesn't work with rodir due to FS_FindFile logic
// when it will use FS_Open, check that FS_CheckForQuakePak correctly
// detects Quake gamedirs in RoDir
packhandle = FS_SysOpen( packfile, "rb" );
if( packhandle == NULL )
@ -364,3 +366,45 @@ searchpath_t *FS_AddPak_Fullpath( const char *pakfile, int flags )
return search;
}
/*
================
FS_CheckForQuakePak
To generate fake gameinfo for Quake directory, we need to parse pak0.pak
and find progs.dat in it
================
*/
qboolean FS_CheckForQuakePak( const char *pakfile, const char *files[], size_t num_files )
{
qboolean is_quake = false;
pack_t *pak;
int i;
pak = FS_LoadPackPAK( pakfile, NULL );
if( !pak )
return false;
for( i = 0; i < num_files; i++ )
{
int j;
for( j = 0; j < pak->numfiles; j++ )
{
if( Q_strchr( pak->files[j].name, '/' ))
continue; // exclude subdirectories
if( !Q_stricmp( pak->files[j].name, files[i] ))
{
is_quake = true;
break;
}
}
if( is_quake )
break;
}
Mem_Free( pak );
return is_quake;
}