C++之位测试练习的相关代码

## 位测试相关代码

#include <iostream>
#include <stdio.h>
#include <arpa/inet.h>

using namespace std;

typedef unsigned int UINT32;

typedef union {
	struct Color{
		UINT32 end:6;
		UINT32 b:8;
		UINT32 g:8;
		UINT32 r:8;
		UINT32 type: 2;
	} color;
	UINT32 data;
} ColorData;

#define TYPE_LEN 2
#define R_LEN 8
#define G_LEN 8
#define B_LEN 8
#define END_LEN 6

UINT32 formColor(UINT32 type,UINT32 r,UINT32 g,UINT32 b,UINT32 end){
	printf("type:t%un",type << 30);
	printf("r:t%un",r << 22);
	printf("g:t%un",g << 14);
	printf("b:t%un",b << 6);
	return (type << 30) + (r << 22) + (g << 14) + (b << 6) + (end);
}

bool isBigEndian(){
	int x = 1;
	char * p = (char *)&x;
	if(*p == 1)
		return false;
	else
		return true;
}


int main(){
	
	ColorData gColorData;
	UINT32 col = formColor(2,60,60,60,20);

	gColorData.data = col;
	printf("htonl:t%dn",col);
	printf("Endian-Mode:%dn",isBigEndian());
	printf("colordata:t%un",col);
	printf("==============================================n");
	printf("type:t%dn",gColorData.color.type);
	printf("r:t%dn",gColorData.color.r);
	printf("g:t%dn",gColorData.color.g);
	printf("b:t%dn",gColorData.color.b);
	printf("end:t%dn",gColorData.color.end);
	printf("==============================================n");
	return 0;
}

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