cm3d2.dll API

Filesystem types

CM3D2.dll recognizes two filesystem types: Windows (0) and Archive (1).

Filesystem structures

Externally, a filesystem is a struct:

struct FileSystem {
    int* internals_ptr;    // Pointer to the internal structure
    int  fs_type;          // Type of the filesystem (0 = windows, 1 = archive)
};

Internal file system

An internal file system consists of the following interfaces: InterfaceFileShare, InterfaceFileSystemAnsi, InterfaceFileSystemWide, InterfaceFileSystemUtf8, InterfaceFileSystem.

Archive internals

Internally, the class of

The archives' internals contains the following values.

The location is in bytes and relative to structure's start address.

Type	Location (HEX)	Value	Notes
Address	0	0x7FFF0F641A10	Pointer to a part of vftable for FileSystemArchive
Address	8	0x7FFF0F6419E8	Pointer to compile-time constant; Value: 0xF8FF FFFF 7000 0000
Address	10	0x7FFF0F641498	Pointer to a part of vftable for FileSystemArchive
Address	18	0x7FFF0F641D88	Pointer to compile-time constant; Value: 0xF8FF FFFF 6000 0000
Address	20	0x7FFF0F641A50	Pointer to a part of vftable for FileSystemArchive
Address	28	0x7FFF0F641C30	Pointer to compile-time constant; Value: 0xF8FF FFFF 5000 0000
Value	30	0x0000ADBA0DF0ADBA	Junk?
Value	40	0x0	NULL
Address	48		NULL
Address	50	qword, varies between runs
Value	58	0x0	NULL
Address	60	qword, varies between runs
Value	68	0x0	NULL
Value	70	0x0DF0ADBA00000000	Junk?
Address	78	0x7FFF0F6419D8	Pointer to vftable of FileSystemArchive

Notes

• Only the 4 top bytes are used fron 8, 18 and 28. Thus essentially they contain values 70, 60 and 50 respectively
• qword at 0x7FFF26350DE8 contains a running counter (of how many filesystems are initialized?)

FileSystemArchive

FileSystemArchive has the following functions:

First VFTable

• vftable1[5] => SetBaseDirectory(*this, char* path)
• vftable1[8] => AddFolder(*this, char* path)
• vftable1[9] => AddArchive(*this, char* path)
• vftable1[10] => AddAutoPathForAllFolder(*this)
• vftable1[13] => AddAutoPath(*this, char* path)

Third VFTable

• vftable[0] => FileMemory* GetFile(*this_third, char* file_str)
• vftable[2] => void* CreateList(*this_third, void* memory, char* path, ListType list_type)
• vftable[8] => BOOL IsExistentFile(*this_third, char* path)

Fourth VFTable

vftable[0] => bool IsValid(*this)

Windows internals

Type	Location (HEX)	Value (at the time of debugging)	Notes
Address	40		Pointer to AddFolder_Impl