====== Toymath ======

作成日: 2023-08-22 (火)

[[https://youtu.be/q7L6ZtljFRU|第2回 DLLについて]]

===== プロジェクト Toymath =====

==== toymath.h ====

<file cpp>
#ifndef TOYMATH_H
#define TOYMATH_H

#ifdef TOYMATH_EXPORT
#   define DECLSPEC __declspec(dllexport)
#else
#   define DECLSPEC __declspec(dllimport)
#endif

#define TMCALL __stdcall

#ifdef __cplusplus
extern "C" {
#endif

DECLSPEC int TMCALL add(int x, int y);

#ifdef __cplusplus
}
#endif

#endif
</file>

==== toymath.cpp ====

<file cpp>
#include "toymath.h"

int TMCALL add(int x, int y) {
    return x + y;
}
</file>

==== test_toymath.cpp ====

<file cpp>
#include "toymath.h"

#include <cassert>

int main() {
    int z = add(100, 200);
    assert(z == 300);
}
</file>

==== toymath-vc.def ====

<file>
LIBRARY "toymath.dll"
EXPORTS
    add = _add@8
</file>

==== toymath-mgw.def ====

<file>
LIBRARY "toymath-mgw.dll"
EXPORTS
    add = add@8
</file>

==== Makefile ====

<file makefile>
.PHONY: all
all: vc

.PHONY: vc mgw
vc: toymath-vc.dll
mgw: toymath-mgw.dll

toymath-vc.dll: toymath.cpp toymath.h toymath-vc.def
	cl /LD /EHsc /DTOYMATH_EXPORT $< /link /DEF:toymath-vc.def
    
toymath-mgw.dll: toymath.cpp toymath.h
	g++ -shared -DTOYMATH_EXPORT -o $@ $< -Wl,--out-implib,libtoymath-mgw.dll.a,--add-stdcall-alias

.PHONY: clean
clean:
	${RM} *.exe *.dll *.obj *.lib *.exp *.a
</file>

===== VBAモジュール Toymath =====

<file vba>
Declare Function Add Lib "toymath-mgw.dll" Alias "add" (ByVal X As Long, ByVal Y As Long) As Long

Sub test_Add()
    ChDir "C:\Users\happycat\Documents\code\excel-dll\toymath"
    Z = Add(100, 200)
    Debug.Assert Z = 300
End Sub
</file>