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

#ifndef UINT8
#define UINT8	unsigned char
#endif
#ifndef UINT16
#define UINT16	unsigned short
#endif
#ifndef UINT32
#define UINT32	unsigned long
#endif

UINT8 g_pattern8[] = {0x01, 0x02, 0x03, 0x4, 0x05, 0x06, 0x07, 0x08};
UINT16 g_pattern16[sizeof(g_pattern8)/2] = {0};
UINT32 g_pattern32[sizeof(g_pattern8)/4] = {0};
UINT8 _g_bytes[4] = {0x12, 0x34, 0x56, 0x78};
UINT8 _g_bytes2[4] = {0};

void MakePattern(void)
{

	int i;

	UINT16 *pPat16 = (UINT16*)g_pattern8;
	UINT32 *pPat32 = (UINT32*)g_pattern8;


	for (i=0; i < sizeof(g_pattern16)/2; i++)
	{
		g_pattern16[i] =  pPat16[i];
	}

	for (i=0; i < sizeof(g_pattern32)/4; i++)
	{
		g_pattern32[i] =  pPat32[i];
	}
}

void PrintPattern(void)
{

	int i;

	printf("Pattern 8bit:\n");
	for (i=0; i < sizeof(g_pattern8); i++)
	{
		printf("%02X ", g_pattern8[i]);
	}
	printf("\n");

	printf("Pattern 16bit:\n");
	for (i=0; i < sizeof(g_pattern16)/2; i++)
	{
		printf("%04X ", g_pattern16[i]);
	}
	printf("\n");

	printf("Pattern 32bit:\n");
	for (i=0; i < sizeof(g_pattern32)/4; i++)
	{
		printf("%08X ", g_pattern32[i]);
	}
	printf("\n");
}

int IsEndianBig(void)
{
	int i, result;

	UINT8 *pBuf8;
	UINT16 *pBuf16;
	UINT32 *pBuf32;
	UINT16 halve;
	UINT32 word;


	halve = 0x1234;
	word = 0x12345678;

	result = -1;

	for (i=0; i < 4; i++)
		_g_bytes2[i] = _g_bytes[i];

	pBuf8 = (UINT8*)&word;
	if (((*pBuf8+0) == 0x12) && (*(pBuf8+1) == 0x34) && (*(pBuf8+2) == 0x56) && (*(pBuf8+3) == 0x78))
	{
		pBuf8 = (UINT8*)&halve;
		if (((*pBuf8+0) == 0x12) && (*(pBuf8+1) == 0x34))
		{
			result = 1;
		}
	}

	pBuf8 = (UINT8*)&word;
	if (((*pBuf8+0) == 0x78) && (*(pBuf8+1) == 0x56) && (*(pBuf8+2) == 0x34) && (*(pBuf8+3) == 0x12))
	{
		pBuf8 = (UINT8*)&halve;
		if (((*pBuf8+0) == 0x34) && (*(pBuf8+1) == 0x12))
		{
			result = 0;
		}
	}
	return result;
}

int main (void)
{
	int eb;

	setbuf(stdout, NULL);

	if (IsEndianBig() == 1)
		printf("Endian is big\n");
	if (IsEndianBig() == 0)
		printf("Endian is little\n");

	MakePattern();
	PrintPattern();


	return 0;
}