hexTobinary

//------------------------------------------------

// 2016.10.17

// 만든이 : 이 규남

// 함수명 : hexTobinary

// 기능 : 1byte 헥사코드를 binary로 변환하는 기능 

//------------------------------------------------

char* hexTobinary(char hex[])

{

int i;

char str[2];

char temp1[4];

char temp2[4];

static char return_data[8];

memset(str, 0x00, sizeof(str));

memset(temp1, 0x00, sizeof(temp1));

memset(temp2, 0x00, sizeof(temp2));

sprintf(str, "%02x", hex[0]);

for(i=0; i<2; i++)

{

if(i == 0)

{

switch(str[i])

{

case '0' :

sprintf(temp1, "0000");

break;

case '1' :

sprintf(temp1, "0001");

break;

case '2' :

sprintf(temp1, "0010");

break;

case '3' :

sprintf(temp1, "0011");

break;

case '4' :

sprintf(temp1, "0100");

break;

case '5' :

sprintf(temp1, "0101");

break;

case '6' :

sprintf(temp1, "0110");

break;

case '7' :

sprintf(temp1, "0111");

break;

case '8' :

sprintf(temp1, "1000");

break;

case '9' :

sprintf(temp1, "1001");

break;

case 'a' :

sprintf(temp1, "1010");

break;

case 'b' :

sprintf(temp1, "1011");

break;

case 'c' :

sprintf(temp1, "1100");

break;

case 'd' :

sprintf(temp1, "1101");

break;

case 'e' :

sprintf(temp1, "1110");

break;

case 'f' :

sprintf(temp1, "1111");

break;

default : 

break;

}

}

else if(i == 1)

{

switch(str[i])

{

case '0' :

sprintf(temp2, "0000");

break;

case '1' :

sprintf(temp2, "0001");

break;

case '2' :

sprintf(temp2, "0010");

break;

case '3' :

sprintf(temp2, "0011");

break;

case '4' :

sprintf(temp2, "0100");

break;

case '5' :

sprintf(temp2, "0101");

break;

case '6' :

sprintf(temp2, "0110");

break;

case '7' :

sprintf(temp2, "0111");

break;

case '8' :

sprintf(temp2, "1000");

break;

case '9' :

sprintf(temp2, "1001");

break;

case 'a' :

sprintf(temp2, "1010");

break;

case 'b' :

sprintf(temp2, "1011");

break;

case 'c' :

sprintf(temp2, "1100");

break;

case 'd' :

sprintf(temp2, "1101");

break;

case 'e' :

sprintf(temp2, "1110");

break;

case 'f' :

sprintf(temp2, "1111");

break;

default : 

break;

}

}

}

sprintf(return_data, "%s%s", temp2, temp1);

return return_data;

}

나같은경우 그냥 단순하게 만들려고 약간 때려박기 식으로 만듬 ㅋㅋ