Import 'c' code and linking DLL's
BlitzMax Forums/BlitzMax Beginners Area/Import 'c' code and linking DLL's
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| hi all, new guy here. i've seen the docs that talk about how to "import" a 'C' source file to be able to use it's functions. i haven't tried to actually do this yet, but i didn't even see my scenario mentioned, so I thought I would ask : i know a bit about how compiling/linking works. assuming that i have a 'C' source file that I want to "Import" into Blitz. this 'C' source file is a wrapper that i want to use to glue my blitz application to some code in a DLL i've built from some other code. how do i get in the middle of the Blitz linker mechanism and get it to link to the DLL ? mucho, Tony |
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If it's a DLL, you shouldn't really need to import C code, as you can just call the DLL directly:
' Function declaration...
Global DoIt (x, y)
' Load DLL...
lib = LoadLibraryA ("mylib.dll")
If lib
' Assign DLL function to function pointer...
DoIt = GetProcAddress (lib, "TestFunction")
Else
Print "Died painfully..."; End
EndIf
Print DoIt (1, 2) ' Calls TestFunction (x, y) from mylib.dll with 1, 2 as parameters
If it's a xxx.a lib, you can just import it, declaring the functions in an Extern/End Extern block. |
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| thanks for the followup. the DLL, in its current form is a 3rd party DLL, is C++ so it isn't extern friendly, and i need to write some 'C' code in any event to bootstrap the stuff in the DLL before i can use it. but i think you answered my question in a roundabout way in any event. i think what i need to do is build my wrapper source into the DLL, which will provide the 'extern' API that i need for Blitz, rather than trying to link Blitz and the wrapper to the DLL. mucho, Tony |
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| Hi Tony, you might also want to take a look at Help -> Language -> Advanced Topics for a little on C/C++ usage. |
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| lib = LoadLibraryA ("mylib.dll") Thats not even recognised in my blitzmax. Steve. |
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| Sorted :) needed Import pub.win32 Steve. |
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