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POHow to debug "syntax error: _stdcall"?
 

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  1. POHow to debug "syntax error: _stdcall"?
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    <p>I am trying to use this code to define the APIs that are needed to communicate with a card reader. Below is the header file (complete). [AtUsbHid.h]</p> <p>It is throwing several errors, but I figure if the syntax issue is solved, the rest will fall into place. </p> <p>I made sure that __export was replaced with __declspec and since this was originally compiled with VC++6, and I am using VS2005, there might be something I'm missing. </p> <p><strong>error C2059: syntax error : '__stdcall'</strong> </p> <pre><code>#ifndef _ATUSBHID_H_ #define _ATUSBHID_H_ // Error codes. #define ERROR_USB_DEVICE_NOT_FOUND 0xE0000001 #define ERROR_USB_DEVICE_NO_CAPABILITIES 0xE0000002 // name of the DLL to be loaded #define AT_USB_HID_DLL "AtUsbHid" // Implement the DLL export/import mechanism and allow a C-written program // to use our DLL. #ifdef ATUSBHID_EXPORTS #define ATUSBHID_API extern "C" __declspec(dllexport) #else #define ATUSBHID_API extern "C" __declspec(dllimport) #endif // This macro function calls the C runtime's _beginthreadex function. // The C runtime library doesn't want to have any reliance on Windows' data // types such as HANDLE. This means that a Windows programmer needs to cast // values when using _beginthreadex. Since this is terribly inconvenient, // this macro has been created to perform the casting. typedef unsigned(__stdcall *PTHREAD_START)(void *); #define chBEGINTHREADEX(psa, cbStack, pfnStartAddr, \ pvParam, fdwCreate, pdwThreadId) \ ((HANDLE)_beginthreadex( \ (void *) (psa), \ (unsigned) (cbStack), \ (PTHREAD_START) (pfnStartAddr), \ (void *) (pvParam), \ (unsigned) (fdwCreate), \ (unsigned *)(pdwThreadId))) // Allow applications not built with Microsoft Visual C++ to link with our DLL. #define STDCALL __stdcall // These macros make calling our DLL functions through pointers easier. #define DECLARE_FUNCTION_POINTER(FUNC) PF_##FUNC lp##FUNC=NULL; #define LOAD_FUNCTION_POINTER(DLL,FUNC) lp##FUNC = (PF_##FUNC)GetProcAddress(DLL, #FUNC); #define ADDR_CHECK(FUNC) if (lp##FUNC == NULL) {fprintf(stderr,"%s\n", "Error: Cannot get address of function."); return FALSE;} #define DYNCALL(FUNC) lp##FUNC /////////////////////////////////////////////////////////////////////////////// typedef BOOLEAN (STDCALL *PF_findHidDevice)(const UINT VendorID, const UINT ProductID); typedef void (STDCALL *PF_closeDevice)(void); typedef BOOLEAN (STDCALL *PF_writeData)(UCHAR* buffer); typedef BOOLEAN (STDCALL *PF_readData)(UCHAR* buffer); typedef int (STDCALL *PF_hidRegisterDeviceNotification)(HWND hWnd); typedef void (STDCALL *PF_hidUnregisterDeviceNotification)(HWND hWnd); typedef int (STDCALL *PF_isMyDeviceNotification)(DWORD dwData); typedef BOOLEAN (STDCALL *PF_setFeature)(UCHAR* buffer); typedef int (STDCALL *PF_getFeatureReportLength)(); typedef int (STDCALL *PF_getInputReportLength)(); typedef int (STDCALL *PF_getOutputReportLength)(); /////////////////////////////////////////////////////////////////////////////// // Exported functions prototypes. /////////////////////////////////////////////////////////////////////////////// ATUSBHID_API BOOLEAN STDCALL findHidDevice(const UINT VendorID, const UINT ProductID); // Closes the USB device and all handles before exiting the application. ATUSBHID_API void STDCALL closeDevice(void); ATUSBHID_API BOOLEAN STDCALL writeData(UCHAR* buf); ATUSBHID_API BOOLEAN STDCALL readData(UCHAR* buffer); ATUSBHID_API int STDCALL hidRegisterDeviceNotification(HWND hWnd); ATUSBHID_API void STDCALL hidUnregisterDeviceNotification(HWND hWnd); ATUSBHID_API int STDCALL isMyDeviceNotification(DWORD dwData); ATUSBHID_API BOOLEAN STDCALL setFeature(UCHAR *buffer); ATUSBHID_API int STDCALL getFeatureReportLength(void); ATUSBHID_API int STDCALL getOutputReportLength(void); ATUSBHID_API int STDCALL getInputReportLength(void); /////////////////////////////////////////////////////////////////////////////// #ifndef ATUSBHID_EXPORTS DECLARE_FUNCTION_POINTER(findHidDevice); DECLARE_FUNCTION_POINTER(closeDevice); DECLARE_FUNCTION_POINTER(writeData); DECLARE_FUNCTION_POINTER(readData); DECLARE_FUNCTION_POINTER(hidRegisterDeviceNotification); DECLARE_FUNCTION_POINTER(hidUnregisterDeviceNotification); DECLARE_FUNCTION_POINTER(isMyDeviceNotification); DECLARE_FUNCTION_POINTER(setFeature); DECLARE_FUNCTION_POINTER(getFeatureReportLength) DECLARE_FUNCTION_POINTER(getOutputReportLength) DECLARE_FUNCTION_POINTER(getInputReportLength) // this function call all function available in the DLL * static bool loadFuncPointers(HINSTANCE hLib) { LOAD_FUNCTION_POINTER(hLib, findHidDevice); ADDR_CHECK(findHidDevice); LOAD_FUNCTION_POINTER(hLib, closeDevice); ADDR_CHECK(closeDevice); LOAD_FUNCTION_POINTER(hLib, writeData); ADDR_CHECK(writeData); LOAD_FUNCTION_POINTER(hLib, readData); ADDR_CHECK(readData); LOAD_FUNCTION_POINTER(hLib, hidRegisterDeviceNotification); ADDR_CHECK(hidRegisterDeviceNotification); LOAD_FUNCTION_POINTER(hLib, hidUnregisterDeviceNotification); ADDR_CHECK(hidUnregisterDeviceNotification); LOAD_FUNCTION_POINTER(hLib, isMyDeviceNotification); ADDR_CHECK(isMyDeviceNotification); LOAD_FUNCTION_POINTER(hLib, setFeature); ADDR_CHECK(setFeature); LOAD_FUNCTION_POINTER(hLib, getOutputReportLength); ADDR_CHECK(getOutputReportLength); LOAD_FUNCTION_POINTER(hLib, getInputReportLength); ADDR_CHECK(getInputReportLength); LOAD_FUNCTION_POINTER(hLib, getFeatureReportLength); ADDR_CHECK(getFeatureReportLength); return true; } #endif #endif // _ATUSBHID_H_ </code></pre>
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