C语言 字节数组和hex和互相转换

C语言 字节数组和hex和互相转换

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

//字节流转换为十六进制字符串
void ByteToHexStr(const unsigned char* source, char* dest, int sourceLen)
{
	short i;
	unsigned char highByte, lowByte;

	for (i = 0; i < sourceLen; i++)
	{
		highByte = source[i] >> 4;
		lowByte = source[i] & 0x0f;

		highByte += 0x30;

		if (highByte > 0x39)
			dest[i * 2] = highByte + 0x07;
		else
			dest[i * 2] = highByte;

		lowByte += 0x30;
		if (lowByte > 0x39)
			dest[i * 2 + 1] = lowByte + 0x07;
		else
			dest[i * 2 + 1] = lowByte;
	}
	return;
}

//十六进制字符串转换为字节流
void HexStrToByte(const char* source, unsigned char* dest, int sourceLen)
{
	short i;
	unsigned char highByte, lowByte;

	for (i = 0; i < sourceLen; i += 2)
	{
		highByte = toupper(source[i]);
		lowByte = toupper(source[i + 1]);

		if (highByte > 0x39)
			highByte -= 0x37;
		else
			highByte -= 0x30;

		if (lowByte > 0x39)
			lowByte -= 0x37;
		else
			lowByte -= 0x30;

		dest[i / 2] = (highByte << 4) | lowByte;
	}
	return;
}


int main()
{
	char array[5] = { 12,45,-12,34,32 };
	char out[1024] = { 0 };
	char arrayout[1024] = { 0 };
	ByteToHexStr((const unsigned char*)array, out, 5);
    printf("%s
",out);
	HexStrToByte((const char*)out, (unsigned char*)arrayout, strlen(out));
    printf("{");
    for(int i = 0; i<strlen(arrayout);i++)
    {
        printf("%d ",arrayout[i]);
    }
    printf("}");
}