mi: replace all WMI calls with MI calls (#1714)

internal/mi/value.go

@@ -0,0 +1,112 @@
+//go:build windows
+
+package mi
+
+import (
+	"errors"
+	"fmt"
+	"unsafe"
+
+	"golang.org/x/sys/windows"
+)
+
+type ValueType int
+
+const (
+	ValueTypeBOOLEAN ValueType = iota
+	ValueTypeUINT8
+	ValueTypeSINT8
+	ValueTypeUINT16
+	ValueTypeSINT16
+	ValueTypeUINT32
+	ValueTypeSINT32
+	ValueTypeUINT64
+	ValueTypeSINT64
+	ValueTypeREAL32
+	ValueTypeREAL64
+	ValueTypeCHAR16
+	ValueTypeDATETIME
+	ValueTypeSTRING
+	ValueTypeREFERENCE
+	ValueTypeINSTANCE
+	ValueTypeBOOLEANA
+	ValueTypeUINT8A
+	ValueTypeSINT8A
+	ValueTypeUINT16A
+	ValueTypeSINT16A
+	ValueTypeUINT32A
+	ValueTypeSINT32A
+	ValueTypeUINT64A
+	ValueTypeSINT64A
+	ValueTypeREAL32A
+	ValueTypeREAL64A
+	ValueTypeCHAR16A
+	ValueTypeDATETIMEA
+	ValueTypeSTRINGA
+	ValueTypeREFERENCEA
+	ValueTypeINSTANCEA
+	ValueTypeARRAY ValueType = 16
+)
+
+type Element struct {
+	value     uintptr
+	valueType ValueType
+}
+
+func (e *Element) GetValue() (any, error) {
+	switch e.valueType {
+	case ValueTypeBOOLEAN:
+		return e.value == 1, nil
+	case ValueTypeUINT8:
+		return uint8(e.value), nil
+	case ValueTypeSINT8:
+		return int8(e.value), nil
+	case ValueTypeUINT16:
+		return uint16(e.value), nil
+	case ValueTypeSINT16:
+		return int16(e.value), nil
+	case ValueTypeUINT32:
+		return uint32(e.value), nil
+	case ValueTypeSINT32:
+		return int32(e.value), nil
+	case ValueTypeUINT64:
+		return uint64(e.value), nil
+	case ValueTypeSINT64:
+		return int64(e.value), nil
+	case ValueTypeREAL32:
+		return float32(e.value), nil
+	case ValueTypeREAL64:
+		return float64(e.value), nil
+	case ValueTypeCHAR16:
+		return uint16(e.value), nil
+	case ValueTypeDATETIME:
+		if e.value == 0 {
+			return nil, errors.New("invalid pointer: value is nil")
+		}
+
+		return *(*Datetime)(unsafe.Pointer(e.value)), nil
+	case ValueTypeSTRING:
+		if e.value == 0 {
+			return nil, errors.New("invalid pointer: value is nil")
+		}
+
+		// Convert the UTF-16 string to a Go string
+		return windows.UTF16PtrToString((*uint16)(unsafe.Pointer(e.value))), nil
+	case ValueTypeSTRINGA:
+		if e.value == 0 {
+			return nil, errors.New("invalid pointer: value is nil")
+		}
+
+		// Assuming array of pointers to UTF-16 strings
+		ptrArray := *(*[]*uint16)(unsafe.Pointer(e.value))
+		strArray := make([]string, len(ptrArray))
+
+		for i, ptr := range ptrArray {
+			strArray[i] = windows.UTF16PtrToString(ptr)
+		}
+
+		return strArray, nil
+	default:
+		return nil, fmt.Errorf("unsupported value type: %d", e.valueType)
+	}
+}