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Index » Learn » How do I interface D to a C library based on a DLL?

Thread overview

How do I interface D to a C library based on a DLL?
Jun 13, 2007 Christopher Grantham
Jun 13, 2007 torhu
Jun 13, 2007 Christopher Grantham
Jun 13, 2007 Christopher Grantham
Jun 13, 2007 Daniel Keep
Jun 13, 2007 Frits van Bommel
Jun 13, 2007 Carlos Santander
Jun 14, 2007 Christopher Grantham
Jun 14, 2007 Carlos Santander
Jun 16, 2007 Christopher Grantham
Jun 13, 2007 Hoenir

June 13, 2007

How do I interface D to a C library based on a DLL?

Posted by Christopher Grantham

Christopher Grantham

Hi,
    I'm very new to D, I have worked with other typical languages previously (C, C++, Java etc) and have some familiarity with .NET (mainly Visual C++), I need to use a C API in the form of a DLL for my uni work (research) and would like to try some experiments in D (I hate VC++ - IJW & M$ interop be damned!), I have the interface (.h), .LIB and .OBJ files as well as the DLL itself, but I'm not sure how to go about using/Linking the API in D, I've used it in VS.NET (VC++) but want to get away from it and use D if possible.
The DLL is closed source/proprietary so I can only edit the interface; I've read the 'Converting C .h files to D Modules' (http://www.digitalmars.com/d/htomodule.html), 'Writing Win32 DLLs in D'(http://www.digitalmars.com/d/dll.html), 'Converting C .h Files to D Modules' (http://www.digitalmars.com/d/htomodule.html), and 'Interfacing to C' (http://www.digitalmars.com/d/interfaceToC.html), however it isn't clear from these articles (at least to a n00b like myself) how I can use this C interfaced DLL in D code.
So far I've tried converting the header to D (manually), which hasn't worked (I get error: 138 data corruption), I think I should be able to interface directly to the C code, but am not confident.
If someone could assist/explain how to get D code working with a C interface from a DLL, then I'd be most grateful.

Thanks in advance.
Chris.

June 13, 2007

Re: How do I interface D to a C library based on a DLL?

Posted by torhu
in reply to Christopher Grantham

torhu

Posted in reply to Christopher Grantham

Christopher Grantham wrote:
> Hi,
>      I'm very new to D, I have worked with other typical languages previously (C, C++, Java etc) and have some familiarity with .NET (mainly Visual C++), I need to use a C API in the form of a DLL for my uni work (research) and would like to try some experiments in D (I hate VC++ - IJW & M$ interop be damned!), I have the interface (.h), .LIB and .OBJ files as well as the DLL itself, but I'm not sure how to go about using/Linking the API in D, I've used it in VS.NET (VC++) but want to get away from it and use D if possible.
> The DLL is closed source/proprietary so I can only edit the interface; I've read the 'Converting C .h files to D Modules' (http://www.digitalmars.com/d/htomodule.html), 'Writing Win32 DLLs in D'(http://www.digitalmars.com/d/dll.html), 'Converting C .h Files to D Modules' (http://www.digitalmars.com/d/htomodule.html), and 'Interfacing to C' (http://www.digitalmars.com/d/interfaceToC.html), however it isn't clear from these articles (at least to a n00b like myself) how I can use this C interfaced DLL in D code.
> So far I've tried converting the header to D (manually), which hasn't worked (I get error: 138 data corruption), I think I should be able to interface directly to the C code, but am not confident.
> If someone could assist/explain how to get D code working with a C interface from a DLL, then I'd be most grateful.

It would be nice to know what you did when you got that error.  But in case you got it when trying to link with a lib file meant for a different linker, I'll explain how to get one that works with dmd.

Download:
ftp://ftp.digitalmars.com/bup.zip

In that zip, you'll find implib.exe.  It creates dmd-compatible import libs, based on DLL files.

implib /s thelib.lib thedll.dll

'thedll.lib' is the output, so move the lib file you've got somewhere else first.  Try linking with that file, if that's what you were doing.

June 13, 2007

Re: How do I interface D to a C library based on a DLL?

Posted by Christopher Grantham
in reply to torhu

Christopher Grantham

Posted in reply to torhu

torhu wrote:
> Christopher Grantham wrote:
>> Hi,
>>      I'm very new to D, I have worked with other typical languages previously (C, C++, Java etc) and have some familiarity with .NET (mainly Visual C++), I need to use a C API in the form of a DLL for my uni work (research) and would like to try some experiments in D (I hate VC++ - IJW & M$ interop be damned!), I have the interface (.h), .LIB and .OBJ files as well as the DLL itself, but I'm not sure how to go about using/Linking the API in D, I've used it in VS.NET (VC++) but want to get away from it and use D if possible.
>> The DLL is closed source/proprietary so I can only edit the interface; I've read the 'Converting C .h files to D Modules' (http://www.digitalmars.com/d/htomodule.html), 'Writing Win32 DLLs in D'(http://www.digitalmars.com/d/dll.html), 'Converting C .h Files to D Modules' (http://www.digitalmars.com/d/htomodule.html), and 'Interfacing to C' (http://www.digitalmars.com/d/interfaceToC.html), however it isn't clear from these articles (at least to a n00b like myself) how I can use this C interfaced DLL in D code.
>> So far I've tried converting the header to D (manually), which hasn't worked (I get error: 138 data corruption), I think I should be able to interface directly to the C code, but am not confident.
>> If someone could assist/explain how to get D code working with a C interface from a DLL, then I'd be most grateful.
> 
> It would be nice to know what you did when you got that error.  But in case you got it when trying to link with a lib file meant for a different linker, I'll explain how to get one that works with dmd.
> 
> Download:
> ftp://ftp.digitalmars.com/bup.zip
> 
> In that zip, you'll find implib.exe.  It creates dmd-compatible import libs, based on DLL files.
> 
> implib /s thelib.lib thedll.dll
> 
> 'thedll.lib' is the output, so move the lib file you've got somewhere else first.  Try linking with that file, if that's what you were doing.
Thanks for that :),
    when I get the error I mentioned, I was attempting to convert the C interface (.h) file to a D module like in the article I mentioned, I was attempting to build it in Eclipse which gave the following output:
project "/OrcfxAPITest" build started, configuration=default
compiling...
C:\dmd\bin\dmd.exe -c -odbin/default src\test.d src\OrcFxAPI.d -IC:\dmd\src\phobos\
linking...
C:\dm\bin\link.exe bin\default\test.obj src\OrcFxGUI.obj bin\default\OrcFxAPI.obj ,bin\OrcfxAPITest.EXE,bin\OrcfxAPITest.map,C:\dmd\lib\ ,,,

OPTLINK (R) for Win32  Release 7.50B1
Copyright (C) Digital Mars 1989 - 2001  All Rights Reserved

src\OrcFxGUI.obj Offset 00000H Record Type 004C
 Error 138: Module or Dictionary corrupt
project "/OrcfxAPITest" build finished

As for your suggestion, I downloaded implib, generated the new .lib file without any problems, moved the original out of the way and tried to build everything in Eclipse, if I use the '.d' file I created by converting the header, and try to import it as a module I get the following (warning, its a bit long):
project "/OrcfxAPITest" build started, configuration=default
compiling...
C:\dmd\bin\dmd.exe -c -odbin/default src\test.d src\OrcFxAPI.d -IC:\dmd\src\phobos\
linking...
C:\dm\bin\link.exe bin\default\test.obj src\OrcFxApi.obj bin\default\OrcFxAPI.obj ,bin\OrcfxAPITest.EXE,bin\OrcfxAPITest.map,C:\dmd\lib\ ,,,

OPTLINK (R) for Win32  Release 7.50B1
Copyright (C) Digital Mars 1989 - 2001  All Rights Reserved

bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 000DDH Record Type 0091
 Error 1: Previous Definition Different : _stUserDefinedError
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 000EDH Record Type 0091
 Error 1: Previous Definition Different : _otGeneral
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 00101H Record Type 0091
 Error 1: Previous Definition Different : _otEnvironment
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 00110H Record Type 0091
 Error 1: Previous Definition Different : _otVessel
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 0011DH Record Type 0091
 Error 1: Previous Definition Different : _otLine
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 0012CH Record Type 0091
 Error 1: Previous Definition Different : _ot6DBuoy
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 00141H Record Type 0091
 Error 1: Previous Definition Different : _ot3DBuoy
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 0014FH Record Type 0091
 Error 1: Previous Definition Different : _otWinch
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 0015CH Record Type 0091
 Error 1: Previous Definition Different : _otLink
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 0016AH Record Type 0091
 Error 1: Previous Definition Different : _otShape
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 0017CH Record Type 0091
 Error 1: Previous Definition Different : _otDragChain
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 0018DH Record Type 0091
 Error 1: Previous Definition Different : _otLineType
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 0019FH Record Type 0091
 Error 1: Previous Definition Different : _otClumpType
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 001B6H Record Type 0091
 Error 1: Previous Definition Different : _otWingType
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 001C9H Record Type 0091
 Error 1: Previous Definition Different : _otVesselType
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 001DFH Record Type 0091
 Error 1: Previous Definition Different : _otDragChainType
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 001F5H Record Type 0091
 Error 1: Previous Definition Different : _otFlexJointType
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 00207H Record Type 0091
 Error 1: Previous Definition Different : _otFlexJoint
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 0021CH Record Type 0091
 Error 1: Previous Definition Different : _otAttachedBuoy
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 00237H Record Type 0091
 Error 1: Previous Definition Different : _otBrowserGroup
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 0024FH Record Type 0091
 Error 1: Previous Definition Different : _otDragCoefficient
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 00266H Record Type 0091
 Error 1: Previous Definition Different : _otAxialStiffness
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 0027FH Record Type 0091
 Error 1: Previous Definition Different : _otBendingStiffness
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 002A2H Record Type 0091
 Error 1: Previous Definition Different : _otBendingConnectionStiffness
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 002C0H Record Type 0091
 Error 1: Previous Definition Different : _otWingOrientation
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 002DBH Record Type 0091
 Error 1: Previous Definition Different : _otKinematicViscosity
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 002F4H Record Type 0091
 Error 1: Previous Definition Different : _otFluidTemperature
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 00309H Record Type 0091
 Error 1: Previous Definition Different : _otCurrentSpeed
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 00322H Record Type 0091
 Error 1: Previous Definition Different : _otCurrentDirection
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 00341H Record Type 0091
 Error 1: Previous Definition Different : _otExternalFunction
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 00363H Record Type 0091
 Error 1: Previous Definition Different : _otHorizontalVariationFactor
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 00375H Record Type 0091
 Error 1: Previous Definition Different : _otLoadForce
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 00388H Record Type 0091
 Error 1: Previous Definition Different : _otLoadMoment
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 003A0H Record Type 0091
 Error 1: Previous Definition Different : _otExpansionFactor
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 003BEH Record Type 0091
 Error 1: Previous Definition Different : _otWinchPayoutRate
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 003D3H Record Type 0091
 Error 1: Previous Definition Different : _otWinchTension
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 003F3H Record Type 0091
 Error 1: Previous Definition Different : _otVerticalVariationFactor
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 0040EH Record Type 0091
 Error 1: Previous Definition Different : _otTorsionalStiffness
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 0042EH Record Type 0091
 Error 1: Previous Definition Different : _otMinimumBendRadius
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 00443H Record Type 0091
 Error 1: Previous Definition Different : _vdnWingAzimuth
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 0045CH Record Type 0091
 Error 1: Previous Definition Different : _vdnWingDeclination
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 0046FH Record Type 0091
 Error 1: Previous Definition Different : _vdnWingGamma
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 0048CH Record Type 0091
 Error 1: Previous Definition Different : _vdnGlobalAppliedForceX
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 004AFH Record Type 0091
 Error 1: Previous Definition Different : _vdnGlobalAppliedForceY
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 004CCH Record Type 0091
 Error 1: Previous Definition Different : _vdnGlobalAppliedForceZ
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 004EAH Record Type 0091
 Error 1: Previous Definition Different : _vdnGlobalAppliedMomentX
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 00508H Record Type 0091
 Error 1: Previous Definition Different : _vdnGlobalAppliedMomentY
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 0052CH Record Type 0091
 Error 1: Previous Definition Different : _vdnGlobalAppliedMomentZ
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 00548H Record Type 0091
 Error 1: Previous Definition Different : _vdnLocalAppliedForceX
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 00564H Record Type 0091
 Error 1: Previous Definition Different : _vdnLocalAppliedForceY
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 00580H Record Type 0091
 Error 1: Previous Definition Different : _vdnLocalAppliedForceZ
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 005A3H Record Type 0091
 Error 1: Previous Definition Different : _vdnLocalAppliedMomentX
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 005C0H Record Type 0091
 Error 1: Previous Definition Different : _vdnLocalAppliedMomentY
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 005DDH Record Type 0091
 Error 1: Previous Definition Different : _vdnLocalAppliedMomentZ
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 005F6H Record Type 0091
 Error 1: Previous Definition Different : _vdnRefCurrentSpeed
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 00619H Record Type 0091
 Error 1: Previous Definition Different : _vdnRefCurrentDirection
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 00639H Record Type 0091
 Error 1: Previous Definition Different : _vdnWholeSimulationTension
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 0065CH Record Type 0091
 Error 1: Previous Definition Different : _vdnWholeSimulationPayoutRate
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 00674H Record Type 0091
 Error 1: Previous Definition Different : _vdnXBendStiffness
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 00691H Record Type 0091
 Error 1: Previous Definition Different : _vdnXBendMomentIn
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 006A8H Record Type 0091
 Error 1: Previous Definition Different : _vdnYBendMomentIn
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 006C0H Record Type 0091
 Error 1: Previous Definition Different : _vdnXBendMomentOut
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 006D8H Record Type 0091
 Error 1: Previous Definition Different : _vdnYBendMomentOut
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 006F3H Record Type 0091
 Error 1: Previous Definition Different : _moduleDynamics
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 00709H Record Type 0091
 Error 1: Previous Definition Different : _moduleVIV
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 00786H Record Type 0091
 Error 1: Previous Definition Different : _pnBuildUp
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 0081BH Record Type 0091
 Error 1: Previous Definition Different : _D8OrcFxAPI6Period6__initZ
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 00841H Record Type 0091
 Error 1: Previous Definition Different : _D8OrcFxAPI11ObjectExtra6__initZ
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 00868H Record Type 0091
 Error 1: Previous Definition Different : _D8OrcFxAPI12ObjectExtra26__initZ
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 0087BH Record Type 0091
 Error 1: Previous Definition Different : _ptEndA
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 0088EH Record Type 0091
 Error 1: Previous Definition Different : _ptEndB
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 008A0H Record Type 0091
 Error 1: Previous Definition Different : _ptTouchdown
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 008B0H Record Type 0091
 Error 1: Previous Definition Different : _ptNodeNum
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 008C2H Record Type 0091
 Error 1: Previous Definition Different : _ptArcLength
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 008D6H Record Type 0091
 Error 1: Previous Definition Different : _rpInner
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 008EAH Record Type 0091
 Error 1: Previous Definition Different : _rpOuter
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 008FDH Record Type 0091
 Error 1: Previous Definition Different : _dtreal
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 00913H Record Type 0091
 Error 1: Previous Definition Different : _dtInteger
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 00922H Record Type 0091
 Error 1: Previous Definition Different : _dtString
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 00933H Record Type 0091
 Error 1: Previous Definition Different : _dtVariable
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 0094DH Record Type 0091
 Error 1: Previous Definition Different : _rtTimeHistory
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 00966H Record Type 0091
 Error 1: Previous Definition Different : _rtRangeGraph
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 0097FH Record Type 0091
 Error 1: Previous Definition Different : _rtLinkedStatistics
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 00993H Record Type 0091
 Error 1: Previous Definition Different : _msReset
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 009B4H Record Type 0091
 Error 1: Previous Definition Different : _msCalculatingStatics
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 009CAH Record Type 0091
 Error 1: Previous Definition Different : _msInStaticState
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 009E4H Record Type 0091
 Error 1: Previous Definition Different : _msRunningSimulation
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 009FEH Record Type 0091
 Error 1: Previous Definition Different : _msSimulationStopped
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 00AD0H Record Type 0091
 Error 1: Previous Definition Different : _msSimulationStoppedUnstable
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 00AFAH Record Type 0091
 Error 1: Previous Definition Different : _D8OrcFxAPI15StatisticsQuery6__initZ
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 00B22H Record Type 0091
 Error 1: Previous Definition Different : _D8OrcFxAPI13WaveComponent6__initZ
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 00B83H Record Type 0091
 Error 1: Previous Definition Different : _D8OrcFxAPI10GraphCurve6__initZ
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 00C7CH Record Type 0091
 Error 1: Previous Definition Different : _D8OrcFxAPI10ObjectInfo6__initZ
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 00CABH Record Type 0091
 Error 1: Previous Definition Different : _D8OrcFxAPI20RangeGraphCurveNames6__initZ
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 00CD4H Record Type 0091
 Error 1: Previous Definition Different : _D8OrcFxAPI14ViewParameters6__initZ
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 00D3EH Record Type 0091
 Error 1: Previous Definition Different : _D8OrcFxAPI23SolveEquationParameters6__initZ
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 00D99H Record Type 0091
 Error 1: Previous Definition Different : _D8OrcFxAPI7VarInfo6__initZ
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 00E18H Record Type 0091
 Error 1: Previous Definition Different : _D8OrcFxAPI9TimeSteps6__initZ
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 00EE3H Record Type 0091
 Error 1: Previous Definition Different : _D8OrcFxAPI42UseCalculatedPositionsForStaticsParameters6__initZ
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 00F15H Record Type 0091
 Error 1: Previous Definition Different : _D8OrcFxAPI23RunSimulationParameters6__initZ
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 00F47H Record Type 0091
 Error 1: Previous Definition Different : _D8OrcFxAPI17AVIFileParameters6__initZ
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 00F60H Record Type 0091
 Error 1: Previous Definition Different : _eaInitialise
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 00FB7H Record Type 0091
 Error 1: Previous Definition Different : _eaFinalise
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 00FC9H Record Type 0091
 Error 1: Previous Definition Different : _eaCalculate
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 00FE2H Record Type 0091
 Error 1: Previous Definition Different : _eaStoreStateCreate
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 00FFCH Record Type 0091
 Error 1: Previous Definition Different : _eaStoreStateDestroy
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 0101AH Record Type 0091
 Error 1: Previous Definition Different : _eaCalculateNominalValue
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 010FAH Record Type 0091
 Error 1: Previous Definition Different : _D8OrcFxAPI20ExternalFunctionInfo6__initZ
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 01135H Record Type 0091
 Error 1: Previous Definition Different : _D8OrcFxAPI32NodeInstantaneousCalculationData6__initZ
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 01210H Record Type 0091
 Error 1: Previous Definition Different : _D8OrcFxAPI34VesselInstantaneousCalculationData6__initZ
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 0124BH Record Type 0091
 Error 1: Previous Definition Different : _D8OrcFxAPI32BuoyInstantaneousCalculationData6__initZ
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 0128CH Record Type 0091
 Error 1: Previous Definition Different : _D8OrcFxAPI32WingInstantaneousCalculationData6__initZ
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 012ACH Record Type 0091
 Error 1: Previous Definition Different : _thstSpectralDensity
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 012D2H Record Type 0091
 Error 1: Previous Definition Different : _thstEmpiricalDistribution
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 012EFH Record Type 0091
 Error 1: Previous Definition Different : _thstRainflowHalfCycles
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 01304H Record Type 0091
 Error 1: Previous Definition Different : _propObjectName
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 0131AH Record Type 0091
 Error 1: Previous Definition Different : _propNumOfStages
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 01338H Record Type 0091
 Error 1: Previous Definition Different : _propStageDuration
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 0134DH Record Type 0091
 Error 1: Previous Definition Different : _propNumOfNodes
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 01365H Record Type 0091
 Error 1: Previous Definition Different : _propNumOfSegments
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 0137DH Record Type 0091
 Error 1: Previous Definition Different : _propNodeArcLength
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 01398H Record Type 0091
 Error 1: Previous Definition Different : _propSegmentArcLength
bin\default\OrcFxAPI.obj(OrcFxAPI)  Offset 01445H Record Type 0091
 Error 1: Previous Definition Different : _D8OrcFxAPI12__ModuleInfoZ
C:\dmd\lib\phobos.lib(ti_double)  Offset 2941CH Record Type 0091
 Error 1: Previous Definition Different : _D10TypeInfo_d6__initZ
C:\dmd\lib\phobos.lib(ti_double)  Offset 29439H Record Type 0091
 Error 1: Previous Definition Different : _D10TypeInfo_d7__ClassZ
C:\dmd\lib\phobos.lib(ti_double)  Offset 29455H Record Type 0091
 Error 1: Previous Definition Different : _D10TypeInfo_d6__vtblZ
project "/OrcfxAPITest" build finished

----------------------------------------------------------------------
Interestingly, if I do this from the command line, I get this output:

K:\Projects\SoftwareDev\Learn D\OrcFxAPITest\src>dmd -run ./test.d OrcFxAPI.d OrcFxAPI.lib
OPTLINK (R) for Win32 Release 7.50B1
Copyright (C) Digital Mars 1989 - 2001  All Rights Reserved

C:\dmd\bin\..\lib\phobos.lib(dmain2)
 Error 42: Symbol Undefined _C_GetDLLVersion@16
--- errorLevel 1
-----------------------------------------------------------------------
So, I'm not sure if I should/can compile this as a D module, or if it should/can get statically linked or something else...as before, any help is very much appreciated

June 13, 2007

Re: How do I interface D to a C library based on a DLL?

Posted by Christopher Grantham
in reply to Christopher Grantham

Christopher Grantham

Posted in reply to Christopher Grantham

Sorry, should have included the 'test.d' file...very n00bish, but its the most simple way to know the API library is working:

#!J:/dmd/bin/dmd.exe -run

import std.stdio;
import std.c.windows.windows;

import OrcFxAPI;

int main(char[][] args) {
	writefln("Hello World!");
	foreach(argv, argc; args) {
		writefln("Arg:\t%s",argv);
	}
	
	// if this works, then we are interfacing to the DLL successfully :)
	/*C_GetDLLVersion(TDLLVersion *lpRequiredDLLVersion,
                                                     TDLLVersion *lpDLLVersion,
                                                     int* lpOK,
                                                     int* lpStatus);
	*/
	TDLLVersion dll_ver;
	int lpOK, lpStatus;
	
	C_GetDLLVersion(null,&dll_ver,&lpOK,&lpStatus);
	writefln("Orcaflex DLL Version:\t%s",dll_ver);
	
	
	return 0;
}

As you can see, I'm assuming the converted header becomes a D module with the filename as the module name (minus the '.d' extension)...
I'm probably going about it all wrong or something, so feel free to correct me, I could use the constructive criticism...

June 13, 2007

Re: How do I interface D to a C library based on a DLL?

Posted by Daniel Keep
in reply to Christopher Grantham

Daniel Keep

Posted in reply to Christopher Grantham

If you've made an import library using implib.exe, then you shouldn't need to manually load the DLL: the import library should do that for you.  Just start using it like you would any other C library...

...unless the library requires you to do something strange before using it...

	-- Daniel

June 13, 2007

Re: How do I interface D to a C library based on a DLL?

Posted by Frits van Bommel
in reply to Christopher Grantham

Frits van Bommel

Posted in reply to Christopher Grantham

Christopher Grantham wrote:
> Sorry, should have included the 'test.d' file...very n00bish, but its the most simple way to know the API library is working:
> 
> #!J:/dmd/bin/dmd.exe -run
> 
> import std.stdio;
> import std.c.windows.windows;
> 
> import OrcFxAPI;
[snip]
> 
> As you can see, I'm assuming the converted header becomes a D module with the filename as the module name (minus the '.d' extension)...
> I'm probably going about it all wrong or something, so feel free to correct me, I could use the constructive criticism...

The naming of the converted header doesn't matter much, though consistency with the C name is probably a good thing.

You may want to post your OrcFxApi.{h,d} files (or links to them) if you need help translating.
Or you could just see if bcd (http://dsource.org/projects/bcd) can translate it automatically.

At first glance, since the errors you get are all "Previous Definition Different", I'd guess you were compiling your translated header and linking to it. And you're not using extern {} to stop inclusion of symbols already defined in the actual library.
If you're using a raw command line, not compiling your module at all may work (if everything needed to use it can be linked in from the C library).
If you're using (re)build, putting "version(build) pragma(nolink);" in the .d file or renaming it to .di may do the trick.
Otherwise, try wrapping your translated header (except any #defines translated to constants or functions) in an "extern {}" (as well as the normal "extern(C) {}").

If none of the above works, post your .h and .d/.di files and someone may be able to help.

June 13, 2007

Re: How do I interface D to a C library based on a DLL?

Posted by Hoenir
in reply to Christopher Grantham

Hoenir

Posted in reply to Christopher Grantham

Christopher Grantham schrieb:
> So far I've tried converting the header to D (manually), which hasn't worked (I get error: 138 data corruption), I think I should be able to interface directly to the C code, but am not confident.
Try using htod: http://www.digitalmars.com/d/htod.html
Also have a look at dmd/samples/d/mydll

June 13, 2007

Re: How do I interface D to a C library based on a DLL?

Posted by Carlos Santander
in reply to Christopher Grantham

Carlos Santander

Posted in reply to Christopher Grantham

Christopher Grantham escribió:
> Interestingly, if I do this from the command line, I get this output:
> 
> K:\Projects\SoftwareDev\Learn D\OrcFxAPITest\src>dmd -run ./test.d OrcFxAPI.d OrcFxAPI.lib
> OPTLINK (R) for Win32 Release 7.50B1
> Copyright (C) Digital Mars 1989 - 2001  All Rights Reserved
> 
> C:\dmd\bin\..\lib\phobos.lib(dmain2)
>  Error 42: Symbol Undefined _C_GetDLLVersion@16
> --- errorLevel 1

This looks like Windows naming convention. Can you try using extern(C) instead of extern(Windows) wherever you define C_GetDLLVersion? Or you could examine the contents of the .lib (lib -l) and see what symbols are there.

-- 
Carlos Santander Bernal

June 14, 2007

Re: How do I interface D to a C library based on a DLL?

Posted by Christopher Grantham
in reply to Carlos Santander

Christopher Grantham

Posted in reply to Carlos Santander

Attachments:

D_LIB-version.PNG

Thanks Frits and Hoenir,
Daniel Keep is helping me to translate the .h to .d files, I tried to
get htod.exe working before, but it falls over when attempting to find
'excpt.h' (which is right there in the lib sub-directory where htod was
extracted...?), as for bcd, I'm downloading the prerequisites etc
now...I'll give it a go and compare my manual translation against what
bcd produces...

Carlos Santander wrote:
> Christopher Grantham escribió:
>> Interestingly, if I do this from the command line, I get this output:
>>
>> K:\Projects\SoftwareDev\Learn D\OrcFxAPITest\src>dmd -run ./test.d
>> OrcFxAPI.d OrcFxAPI.lib
>> OPTLINK (R) for Win32 Release 7.50B1
>> Copyright (C) Digital Mars 1989 - 2001  All Rights Reserved
>>
>> C:\dmd\bin\..\lib\phobos.lib(dmain2)
>>  Error 42: Symbol Undefined _C_GetDLLVersion@16
>> --- errorLevel 1
> 
> This looks like Windows naming convention. Can you try using extern(C) instead of extern(Windows) wherever you define C_GetDLLVersion? Or you could examine the contents of the .lib (lib -l) and see what symbols are there.
> 
hmmm thats interesting:
 >lib -l OrcFxAPI.lib
Digital Mars Librarian Version 8.02n
Copyright (C) Digital Mars 2000-2007 All Rights Reserved
http://www.digitalmars.com/ctg/lib.html
Digital Mars Librarian complete.

So I guess my LIB file has no symbols...?
I tried this for the original lib file:

 >lib -l OrcFxAPI.lib
Digital Mars Librarian Version 8.02n
Copyright (C) Digital Mars 2000-2007 All Rights Reserved
http://www.digitalmars.com/ctg/lib.html

Error: COFF libraries not supported - Use COFF2OMF

Which is to be expected when using the non-D version of the LIB file I
guess, so I examined them as text myself, the D version of the LIB file
has the following references to the C_GetDLLVersion function (attached
picture shows exact format, lots of other chars etc in between), in
order of appearance:
C_GetDLLVersion
_C_GetDLLVersion
OrcFxAPI.dll
C_GetDLLVersion
C_GetDLLVersion@16
_C_GetDLLVersion@16
OrcFxAPI.dll
C_GetDLLVersion@16

Searching through the M$ version of the .LIB file, I find the following symbols in relation to the function ([] indicates those square block characters):

_C_GetDLLVersion@16[]__imp__C_GetDLLVersion@16
_C_GetDLLVersion@16[]
__imp__C_GetDLLVersion@16
C_GetDLLVersion@16[][].text
[][][]__imp__C_GetDLLVersion@16[]__IMPORT_DESCRIPTOR_ORCFXAPI[]

Anyway, I think we're getting closer to the solution, thanks to everyone who has been helping so far, keep up the good work! :)

Thanks again.
Chris

June 14, 2007

Re: How do I interface D to a C library based on a DLL?

Posted by Carlos Santander
in reply to Christopher Grantham

Carlos Santander

Posted in reply to Christopher Grantham

Christopher Grantham escribió:
> hmmm thats interesting:
>  >lib -l OrcFxAPI.lib
> Digital Mars Librarian Version 8.02n
> Copyright (C) Digital Mars 2000-2007 All Rights Reserved
> http://www.digitalmars.com/ctg/lib.html
> Digital Mars Librarian complete.
> 
> So I guess my LIB file has no symbols...?
> I tried this for the original lib file:
> 

There should be a file OrcFxAPI.lst with that info. Sorry for not mentioning that.

-- 
Carlos Santander Bernal

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