OBJ for C

[dedndave]

i want to make a C-callable routine from MASM
i know how to make an OBJ   :bg
my question is, what is the C equiv of PROTO's ?
another one...
is it defined in a .H file ?

[ecube]

not really sure what you're asking, but you can define your masm function as standard stdcall or change it to C in C you'd define it to something similar to the paramets for instance


strcpyX proto C :DWORD,:DWORD

in C it'd be

strcpyX(char *tobuffer,char *frombuffer);

it's consider standard practice to put the definition in a .H but can be in the .c/.c++ file, doesn't matter. Actually in Visual C I don't think you even need to define the function, just use it, and maker sure the linker knows of the .lib or .obj

your static link library(mylib.asm)

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.586
.MODEL FLAT,STDCALL
OPTION CASEMAP:NONE


include \masm32\include\windows.inc
include \masm32\include\kernel32.inc

strcpyX   proto C :DWORD,:DWORD
.code
strcpyX proc tobuf:DWORD,frombuf:DWORD
;whatever
ret
strcpyX endp
End


;build.bat

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:MAKE
\MASM32\BIN\ML /c /coff /Cp mylib.asm
\MASM32\BIN\link /SUBSYSTEM:WINDOWS /LIBPATH:c:\masm32\lib /SECTION:.text,RWX mylib.obj
pause

then to use in visual C++ you can either specify in the linker includelibs mylib.lib or you can

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#pragma comment(lib, "mylib.lib")
in the source file


example.c

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#include <windows.h>
#pragma comment(lib, "mylib.lib")
strcpyX(char *tobuffer,char *frombuffer); //probably not needed
int main()
{
char mybuf[256];
strcpyX(mybuff,"teststr");
return 0;
}


[dedndave]

thanks, Cube
i think that covers what i wanted to know nicely   :U