VC ATL, #importing a typelibrary with non-8 byte alignment

#importing a typelibrary with non-8 byte alignment

Author	Message
Morten S?rense #1 / 5	#importing a typelibrary with non-8 byte alignment Hi, I have a type library generated by delphi with 1-byte alignment and I want to use it from VC++ When I import the .tlb file usign the #import VC++ generates a .tlh wrapper file with 8-byte alignment ... #pragma pack(push, 8) ... When generating the type library with MIDL I've tryed to spec. the "/align 1" or "/pack 1" or "/Zp1", but the #import seems to ignore the type library alignment setting and always use 8-byte alignment. So, at the moment I modify the .tlh file to 1 byte alignment and include this file instead of importing the type library. Is it possible to specify the you want to use 1 byte allignment when importing a type library?? Regards, Morten S?rensen
Fri, 23 May 2003 03:00:00 GMT

Alexander Nickolo #2 / 5	#importing a typelibrary with non-8 byte alignment There is no alignment property in the type library. In fact VB uses a four byte alignment which is incompatible with the #import pragma. Automation added structures but didn't say anything anout alignment. If we consider the VB behavior as the standard, 4-byte alignment it is... Shortly, don't rely on type libraries... -- ===================================== Alexander Nickolov Microsoft MVP [VC], MCSD MVP VC FAQ: http://www.mvps.org/vcfaq ===================================== Quote: > Hi, > I have a type library generated by Delphi with 1-byte alignment and I want > to use it from VC++ > When I import the .tlb file usign the #import VC++ generates a .tlh wrapper > file with 8-byte alignment > ... > #pragma pack(push, 8) > ... > When generating the type library with MIDL I've tryed to spec. the "/align > 1" or "/pack 1" or "/Zp1", but the #import seems to ignore the type library > alignment setting and always use 8-byte alignment. > So, at the moment I modify the .tlh file to 1 byte alignment and include > this file instead of importing the type library. > Is it possible to specify the you want to use 1 byte allignment when > importing a type library?? > Regards, > Morten S?rensen
Fri, 23 May 2003 03:00:00 GMT

Morten S?rense #3 / 5	#importing a typelibrary with non-8 byte alignment Quote: > There is no alignment property in the type library. What I was refering to was the packing level for structures controlled by the #pragma pack directive, or the /align, /pack, or /Zp options on the MIDL compiler. Regards, Morten S?rensen
Sat, 24 May 2003 03:00:00 GMT

Alexander Nickolo #4 / 5	#importing a typelibrary with non-8 byte alignment That's exactly what I meant too. It is called byte alignment. -- ===================================== Alexander Nickolov Microsoft MVP [VC], MCSD MVP VC FAQ: http://www.mvps.org/vcfaq ===================================== Quote: > > There is no alignment property in the type library. > What I was refering to was the packing level for structures controlled by > the #pragma pack directive, or the > /align, /pack, or /Zp options on the MIDL compiler. > Regards, > Morten S?rensen
Sat, 24 May 2003 03:00:00 GMT

Joe Rohde [MSFT #5 / 5	#importing a typelibrary with non-8 byte alignment Try adding: inject_statement("#pragma pack(1)") to your #import line, if you are absolutely certain you want this behavior. This will inject right after the namespace declaration, which occurs later than the injected header. By not using a 'push' with the pack, the final pack/pop at the end of the file should correctly restore the state to what it was before the .tlh file was parsed. Quote: > Hi, > Is it possible to specify the you want to use 1 byte allignment when > importing a type library?? > Regards, > Morten S?rensen
Sat, 24 May 2003 03:00:00 GMT

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