[英]Converting a string of mac address into hex in C
I want to convert a string of mac address into hex format.我想将一串mac地址转换为十六进制格式。
char remote_device_mac[] = "00a05056a810";
uint8_t base_mac_addr[6] = {0x00,0xa0,0x50,0x56,0xa8,0x10};
My code:-我的代码:-
char dummy[2] = {0};
int j = 0;
uint8_t num = 0;
for(int k=0;k<6;k++)
{
for(int i=0;i<2;i++)
dummy[i] = remote_device_mac[i+j];
num = (int)strtol(dummy, NULL, 8);
j=j+2;
sprintf(base_mac_addr[k], "%x", num);
num = 0;
memset(dummy,0,2);
}
char dummy[2] = {0};
size of dummy
has at least 3 bytes (2 for value in hexa, 1 for \0
). dummy
的大小至少有 3 个字节(2 表示 hexa 值,1 表示\0
)。 So you can declare as:所以你可以声明为:
char dummy[3] = "00";
Use base = 16 instead of 10, because you want to convert to hexadecimal.使用 base = 16 而不是 10,因为您要转换为十六进制。
num = strtol(dummy, &ptr, 16);
sprintf
is not necessary (use it if you want to copy number into a string). sprintf
不是必需的(如果要将数字复制到字符串中,请使用它)。
// assign each base_mac_addr to num.
base_mac_addr[k] = num;
Finally, the code as below:最后,代码如下:
for(int k=0;k<6;k++)
{
for(int i=0;i<2;i++)
dummy[i] = remote_device_mac[i+j];
num = strtol(dummy, &ptr, 16);
j=j+2;
printf("0x%2x\n", num);
base_mac_addr[k] = num;
}
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