diff options
Diffstat (limited to 'src/palrt')
| -rw-r--r-- | src/palrt/guid.cpp | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/src/palrt/guid.cpp b/src/palrt/guid.cpp index bd782c8502..14cd3bb490 100644 --- a/src/palrt/guid.cpp +++ b/src/palrt/guid.cpp @@ -24,3 +24,25 @@ DEFINE_GUID(IID_IClassFactory, 0x00000001, 0x0000, 0x0000, 0xC0, 0x00, 0x00, 0x0 // objidl.idl DEFINE_GUID(IID_ISequentialStream, 0x0c733a30, 0x2a1c, 0x11ce, 0xad, 0xe5, 0x00, 0xaa, 0x00, 0x44, 0x77, 0x3d); DEFINE_GUID(IID_IStream, 0x0000000c, 0x0000, 0x0000, 0xC0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x46); + +// Create a random guid based on the https://www.ietf.org/rfc/rfc4122.txt +STDAPI +CoCreateGuid(OUT GUID * pguid) +{ + PAL_Random(pguid, sizeof(GUID)); + + static const USHORT VersionMask = 0xF000; + static const USHORT RandomGuidVersion = 0x4000; + + static const BYTE ClockSeqHiAndReservedMask = 0xC0; + static const BYTE ClockSeqHiAndReservedValue = 0x80; + + // Modify bits indicating the type of the GUID + + // time_hi_and_version + pguid->Data3 = (pguid->Data3 & ~VersionMask) | RandomGuidVersion; + // clock_seq_hi_and_reserved + pguid->Data4[0] = (pguid->Data4[0] & ~ClockSeqHiAndReservedMask) | ClockSeqHiAndReservedValue; + + return S_OK; +} |