#include <stdio.h>
#include <stdlib.h>
static char const hex_digits[] = {
'0', '1', '2', '3',
'4', '5', '6', '7',
'8', '9', 'a', 'b',
'c', 'd', 'e', 'f',
};
void encode_uuid(char out[static 33], char const in[static 16]) {
for (size_t ii = 0, oi = 0; ii < 16; ii++, oi += 2) {
out[oi ] = hex_digits[(in[ii] & 0xF0) >> 4];
out[oi + 1] = hex_digits[(in[ii] & 0x0F) ];
}
out[32] = 0;
}
int main() {
char uuid[16] = {0, 0xab, 2, 3, 4, 5, 6, 7, 0xda, 9, 10, 11, 12, 13, 14, 15};
char text[33];
encode_uuid(text, uuid);
printf("%s\n", text);
return 0;
}
