Follow up of #18345 to add support (currently only on `Windows`; see
notes below) for playing a PS3 disc game directly from a Blu-Ray Disc
Drive.
### HOW IT WORKS:
- The BD drive can be added as any other game so from `VFS games` or
from `Add Games` menu. In case it is selected from `VFS games`, any
attempt to write files is discarded, e.g. file `Disc Games Can Be Put
Here For Automatic Detection.txt`
- It scans the default redump keys folder `<rpcs3>/data/redump` (it
currently needs to be manually created due it is not yet provided by
rpcs3 installation) to find a matching decryption key
### NOTES:
- Support is currently provided on `Windows` where I can fully test it.
I cannot test under other OS. However, the additions needed for the
other OS are limited only on `fs::file.h/cpp`. In particular inside the
following new functions:
- `bool is_optical_raw_device(const std::string& path);`
- `bool get_optical_raw_device(const std::string& path, std::string*
raw_device = nullptr);`
- Icons etc. are always refreshed (ISO cache cannot be used due `mtime`
on raw device is not available and any cache check would always fail)
- Code in `ISO.h/cpp` needed some rework to properly manage a read on a
raw device (alignment on offset, size and memory is mandatory). The BD
drive needs to be detected as a file, not as a folder
### MINOR FIXES:
- Fixed wrong specifier used in logging on `ISO.h/cpp`
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On empty mounted drives CreateFileW may return a valid handle even if the drive is not usable.
We have to check the file handle early. Otherwise other functions may fail later as a result.
fix compile errors on Mac and provide reviewed changes
fix wrong resolved conflict
removed duplicate
cleanup after latest merged PRs
minor cleanup
rename and move get_existing_dir() to File.cpp
apply reviewed changes
File descripor ID with 2 provided ways to compare between them:
1. is_mirror_of():
Test if identical:
For example: when LHS writes one byte to a file at X offset, RHS file be able to read that exact byte at X offset)
2. is_coherent_with():
Test if both files point to the same file:
For example: if a file descriptor pointing to the complete file exists and is being truncated to 0 bytes from non-
-zero size state: this has to affect both RHS and LHS files.
sendfile is meant to be run in a loop, since there is no guarantee that a single call copies all the data.
The current implementation may lead to corrupt files on linux.
