// Test_D12_Driver.cpp
//
// Generated by DriverWizard version DriverStudio 3.0.0 (Build 1126)
//
// This console application demonstrates how to open a handle
// to a device in your driver, and communicate with the driver
// using Read, Write, and DeviceIoControl calls, as appropriate.
//
// This test program attempts to open the device using the
// GUID defined in "..\D12_DriverDeviceinterface.h"

#include <stdlib.h>
#include <stdio.h>
#include <windows.h>

#include <winioctl.h>
#include "..\D12_Driverioctl.h"

#include "..\D12_DriverDeviceinterface.h"	// Has class GUID definition

// This function is found in module OpenByIntf.cpp
HANDLE OpenByInterface(GUID* pClassGuid, DWORD instance, PDWORD pError);

typedef void VOIDFUNC();

// Prototypes
void Usage(void);
void ShowIoctlValues(void);

//	TODO:
//		You can redefine the IOCTL handler prototypes as needed, adding
//		appropriate parameters that can be collected from the command line.
//		To do this you must modify the command line parsing logic.  An
//		example of this is shown in comments throughout the test application.
//
//=== Parameterized IOCTL Example ===
// void Test_IOCTL_PARAMETERIZED(int nVal, ULONG dwVal);
void Test_D12_DRIVER_READ(void);
void Test_D12_DRIVER_WRITE(void);

void CloseIfOpen(void);

// Global data


#define N_IOCODES	2

// Names of IOCTL codes
//
char *IOnames[N_IOCODES+1] =
{

//=== Parameterized IOCTL Example ===
//	"IOCTL_PARAMETERIZED",
	"D12_DRIVER_READ",
	"D12_DRIVER_WRITE",
	""
};

// IOCTL codes
//
int IOcodes[N_IOCODES+1] =
{

//=== Parameterized IOCTL Example ===
//	IOCTL_PARAMETERIZED,
	D12_DRIVER_READ,
	D12_DRIVER_WRITE,
	0
};


// Handle to device opened in driver.
//
HANDLE	hDevice = INVALID_HANDLE_VALUE;

// Class GUID used to open device
//
GUID ClassGuid = D12_DriverDevice_CLASS_GUID;


////////////////////////////////////////////////////////////////////////
// Exit
//
//		Print a message and exit
//
   void Exit(int res)
{
	printf("Exiting...\n\n");
	CloseIfOpen();
	exit(res);
}


////////////////////////////////////////////////////////////////////////
// Main entry point
//
//
int __cdecl main(int argc, char *argv[])
{
	int		nArgIndex;				// Walk through command line arguments
	int		nArgIncrement = 0;
	int		val;

//=== Parameterized IOCTL Example ===
//	int		nVal;
//	ULONG	dwVal;
	DWORD	Error;

	printf("Test application Test_D12_Driver starting...\n");

	hDevice = OpenByInterface( &ClassGuid, 0, &Error);
	if (hDevice == INVALID_HANDLE_VALUE)
	{
		printf("ERROR opening device: (%0x) returned from CreateFile\n", GetLastError());
		Exit(1);
	}
	else
	{
		printf("Device found, handle open.\n");
	}

	// Parse the command line

	if (argc < 2) Usage();

	nArgIndex = 1;
	while (nArgIndex < argc)
	{
		// Parse ahead to determine numeric value of argument

		if (nArgIndex+1 >= argc) Usage();
		if (!isdigit(argv[nArgIndex+1][0])) Usage();
		val = atoi(argv[nArgIndex+1]);

		switch (argv[nArgIndex][0])
		{

			case 'r':
			case 'R':
				printf("Driver does not have a read handler\n");
				nArgIncrement = 2;
				break;

			case 'w':
			case 'W':
				printf("Driver does not have a write handler\n");
				nArgIncrement = 2;
				break;

			case 'i':
			case 'I':
				if (val >= N_IOCODES)
				{
					printf("IO control code index must be less than %d\n", N_IOCODES);
					ShowIoctlValues();
					Exit(1);
				}
				switch (IOcodes[val])
				{

//=== Parameterized IOCTL Example ===
//					case IOCTL_PARAMETERIZED:
//						if (nArgIndex+3 >= argc) Usage();
//						nVal = atoi(argv[nArgIndex+2]);
//						dwVal = strtoul(argv[nArgIndex+3], NULL, 0);
//						Test_IOCTL_PARAMETERIZED(nVal, dwVal);
//						nArgIncrement = 4;
//						break;

					case D12_DRIVER_READ:
						Test_D12_DRIVER_READ();
						nArgIncrement = 2;
						break;

					case D12_DRIVER_WRITE:
						Test_D12_DRIVER_WRITE();
						nArgIncrement = 2;
						break;

					default:
						printf("IO control code not valid\n");
						Exit(1);

				}
				break;

			case '?':
			case 'h':
			default:
				Usage();
		}
		nArgIndex += nArgIncrement;
	}

	return 0;
}


////////////////////////////////////////////////////////////////////////
// CloseIfOpen
//
//		Close the device if we previously opened a handle to it.
//
void CloseIfOpen(void)
{
	if (hDevice != INVALID_HANDLE_VALUE)
	{
		// Close the handle to the driver
		if (!CloseHandle(hDevice))
		{
			printf("ERROR: CloseHandle returns %0x.\n", GetLastError());
		}
		hDevice = INVALID_HANDLE_VALUE;
	}
}






////////////////////////////////////////////////////////////////////////
// Usage
//
//		Print a usage message describing arguments to this program
//
void Usage(void)
{
	printf("Usage: Test_D12_Driver [r n] [w n] [i n]\n");
	printf("       i initiates an IO Control Code message with specified index value\n");
	ShowIoctlValues();
	printf("Example:\n");
	printf("    Test_D12_Driver r 32 w 32\n");
	printf("        read 32 bytes, then write 32 bytes\n");

	Exit(1);
}



#define	IOCTL_INBUF_SIZE	512
#define	IOCTL_OUTBUF_SIZE	512

//=== Parameterized IOCTL Example ===
//void Test_IOCTL_PARAMETERIZED(int nVal, ULONG dwVal)
//{
//  Function body same as other IOCTL handlers, with command line
//	parameters 'nVal' and 'dwVal' available as input.
//}

////////////////////////////////////////////////////////////////////////
// Test_D12_DRIVER_READ
//
//		Test one Io Control Code
//
// TODO:
//		Pass appropriate arguments to your device and check
//		the return value
//
void Test_D12_DRIVER_READ(void)
{
// Note that Input and Output are named from the point of view
// of the DEVICE:
//		bufInput  supplies data to the device
//		bufOutput is written by the device to return data to this application

	CHAR	bufInput[IOCTL_INBUF_SIZE];		// Input to device
	CHAR	bufOutput[IOCTL_OUTBUF_SIZE];	// Output from device
	ULONG	nOutput;						// Count written to bufOutput

	// Call device IO Control interface (D12_DRIVER_READ) in driver
	printf("Issuing Ioctl to device - ");
	if (!DeviceIoControl(hDevice,
						 D12_DRIVER_READ,
						 bufInput,
						 IOCTL_INBUF_SIZE,
						 bufOutput,
						 IOCTL_OUTBUF_SIZE,
						 &nOutput,
						 NULL)
	   )
	{
		printf("ERROR: DeviceIoControl returns %0x.", GetLastError());
		Exit(1);
	}
}

////////////////////////////////////////////////////////////////////////
// Test_D12_DRIVER_WRITE
//
//		Test one Io Control Code
//
// TODO:
//		Pass appropriate arguments to your device and check
//		the return value
//
void Test_D12_DRIVER_WRITE(void)
{
// Note that Input and Output are named from the point of view
// of the DEVICE:
//		bufInput  supplies data to the device
//		bufOutput is written by the device to return data to this application

	CHAR	bufInput[IOCTL_INBUF_SIZE];		// Input to device
	CHAR	bufOutput[IOCTL_OUTBUF_SIZE];	// Output from device
	ULONG	nOutput;						// Count written to bufOutput

	// Call device IO Control interface (D12_DRIVER_WRITE) in driver
	printf("Issuing Ioctl to device - ");
	if (!DeviceIoControl(hDevice,
						 D12_DRIVER_WRITE,
						 bufInput,
						 IOCTL_INBUF_SIZE,
						 bufOutput,
						 IOCTL_OUTBUF_SIZE,
						 &nOutput,
						 NULL)
	   )
	{
		printf("ERROR: DeviceIoControl returns %0x.", GetLastError());
		Exit(1);
	}
}


////////////////////////////////////////////////////////////////////////
// ShowIoctlValues
//
//		Print list of IO Control Code values for usage display
//
void ShowIoctlValues(void)
{
	int i;

	for (i=0; i<N_IOCODES; i++)
	{
		if (i==0)
			printf( "         IO control code index\n");
		printf( "           %d is code %s [%x]\n", i, IOnames[i], IOcodes[i]);

//=== Parameterized IOCTL Example ===
//		if (IOcodes[i] == IOCTL_PARAMETERIZED)
//		{
//			printf( "               and has two arguments: <arg1 desc.> <arg1 desc.>\n");
//			printf( "               Example: i %d <IOCTL index> <ex. arg1> <ex. arg2>\n", i);
//		}
	}
}