hex转string
void hex2str(uint8_t *input, uint16_t input_len, char *output)
{
char *hexEncode = "0123456789ABCDEF";
int i = 0, j = 0;
for (i = 0; i < input_len; i++) {
output[j++] = hexEncode[(input[i] >> 4) & 0xf];
output[j++] = hexEncode[(input[i]) & 0xf];
}
}
string转hex
#define isDigit(c) (((c) <= '9' && (c) >= '0') ? (1) : (0))
static uint8_t hex2dec(char hex)
{
if (isDigit(hex)) {
return (hex - '0');
}
if (hex >= 'a' && hex <= 'f') {
return (hex - 'a' + 10);
}
if (hex >= 'A' && hex <= 'F') {
return (hex - 'A' + 10);
}
return 0;
}
static int str2hex(char *input, int input_len, unsigned char *output, int max_len)
{
int i = 0;
uint8_t ch0, ch1;
if (input_len % 2 != 0) {
return -1;
}
while (i < input_len / 2 && i < max_len) {
ch0 = hex2dec((char)input[2 * i]);
ch1 = hex2dec((char)input[2 * i + 1]);
output[i] = (ch0 << 4 | ch1);
i++;
}
return i;
}
|