Implement SetupDiClassNameFromGuidExA.

dlls/setupapi/devinst.c

@@ -34,6 +34,7 @@
 #include "setupapi.h"
 #include "wine/debug.h"
 #include "wine/unicode.h"
+#include "cfgmgr32.h"
 #include "initguid.h"
 #include "winioctl.h"
 #include "rpc.h"
@@ -469,8 +470,24 @@ BOOL WINAPI SetupDiClassNameFromGuidExA(
         PCSTR MachineName,
         PVOID Reserved)
 {
-  FIXME("\n");
-  return FALSE;
+    WCHAR ClassNameW[MAX_CLASS_NAME_LEN];
+    LPWSTR MachineNameW = NULL;
+    BOOL ret;
+
+    if (MachineName)
+        MachineNameW = MultiByteToUnicode(MachineName, CP_ACP);
+    ret = SetupDiClassNameFromGuidExW(ClassGuid, ClassNameW, MAX_CLASS_NAME_LEN,
+     NULL, MachineNameW, Reserved);
+    if (ret)
+    {
+        int len = WideCharToMultiByte(CP_ACP, 0, ClassNameW, -1, ClassName,
+         ClassNameSize, NULL, NULL);
+
+        if (!ClassNameSize && RequiredSize)
+            *RequiredSize = len;
+    }
+    MyFree(MachineNameW);
+    return ret;
 }
 
 /***********************************************************************

include/cfgmgr32.h

@@ -23,6 +23,10 @@ typedef DWORD CONFIGRET;
 
 #define CR_SUCCESS 0
 
+#define MAX_CLASS_NAME_LEN  32
+#define MAX_GUID_STRING_LEN 39
+#define MAX_PROFILE_LEN     80
+
 CONFIGRET WINAPI CM_Get_Device_ID_ListA( PCSTR, PCHAR, ULONG, ULONG );
 CONFIGRET WINAPI CM_Get_Device_ID_ListW( PCWSTR, PWCHAR, ULONG, ULONG );
 #define     CM_Get_Device_ID_List WINELIB_NAME_AW(CM_Get_Device_ID_List)