/
dllcall.go
156 lines (132 loc) · 3.56 KB
/
dllcall.go
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package sys
import (
"runtime"
"syscall"
"unsafe"
)
func init() {
runtime.LockOSThread()
}
type DLLClass struct {
Handle uintptr
}
func TEXT(str string) uintptr {
return uintptr(unsafe.Pointer(syscall.StringToUTF16Ptr(str)))
}
func MustLoadLibrary(name string) uintptr {
lib, err := syscall.LoadLibrary(name)
if err != nil {
panic("DLL < " + name + " > failed to load," + err.Error())
}
return uintptr(lib)
}
func MustGetProcAddress(lib uintptr, name string) uintptr {
addr, err := syscall.GetProcAddress(syscall.Handle(lib), name)
if err != nil {
panic("Failed to get the address function < " + name + " >," + err.Error())
}
return uintptr(addr)
}
func Dll(dllName string) *DLLClass {
DllCls := &DLLClass{}
DllCls.Handle = MustLoadLibrary(dllName)
return DllCls
}
func (dllCls *DLLClass) Free() {
syscall.FreeLibrary(syscall.Handle(dllCls.Handle))
}
func (dllCls *DLLClass) Call(apiName interface{}, argvs ...uintptr) uintptr {
var nArgvs = uintptr(len(argvs))
var apiFunc uintptr
switch apiName.(type) {
case string:
apiFunc = MustGetProcAddress(dllCls.Handle, apiName.(string))
case uintptr:
apiFunc = apiName.(uintptr)
default:
panic("The parameters of the function < " + apiName.(string) + " > must be uintptr or string type")
}
if nArgvs <= 3 {
cArgs := []uintptr{0, 0, 0}
for k, v := range argvs {
cArgs[k] = v
}
apiRet, _, _ := syscall.Syscall(apiFunc, nArgvs,
cArgs[0],
cArgs[1],
cArgs[2])
return apiRet
} else if nArgvs <= 6 {
cArgs := []uintptr{0, 0, 0, 0, 0, 0}
for k, v := range argvs {
cArgs[k] = v
}
apiRet, _, _ := syscall.Syscall6(apiFunc, nArgvs,
cArgs[0],
cArgs[1],
cArgs[2],
cArgs[3],
cArgs[4],
cArgs[5])
return apiRet
} else if nArgvs <= 9 {
cArgs := []uintptr{0, 0, 0, 0, 0, 0, 0, 0, 0}
for k, v := range argvs {
cArgs[k] = v
}
apiRet, _, _ := syscall.Syscall9(apiFunc, nArgvs,
cArgs[0],
cArgs[1],
cArgs[2],
cArgs[3],
cArgs[4],
cArgs[5],
cArgs[6],
cArgs[7],
cArgs[8])
return apiRet
} else if nArgvs <= 12 {
cArgs := []uintptr{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}
for k, v := range argvs {
cArgs[k] = v
}
apiRet, _, _ := syscall.Syscall12(apiFunc, nArgvs,
cArgs[0],
cArgs[1],
cArgs[2],
cArgs[3],
cArgs[4],
cArgs[5],
cArgs[6],
cArgs[7],
cArgs[8],
cArgs[9],
cArgs[10],
cArgs[11])
return apiRet
} else if nArgvs <= 15 {
cArgs := []uintptr{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}
for k, v := range argvs {
cArgs[k] = v
}
apiRet, _, _ := syscall.Syscall15(apiFunc, nArgvs,
cArgs[0],
cArgs[1],
cArgs[2],
cArgs[3],
cArgs[4],
cArgs[5],
cArgs[6],
cArgs[7],
cArgs[8],
cArgs[9],
cArgs[10],
cArgs[11],
cArgs[12],
cArgs[13],
cArgs[14])
return apiRet
} else {
panic("Function < " + apiName.(string) + " > Call too many parameters.")
}
}