#include <inttypes.h>
#include <string.h>
#include <unistd.h>
+#include <ctype.h>
#include "util.h"
#include "util_posix.h"
#include "iso14443crc.h"
return 1;
}
- if (isxdigit(c)) {
+ if (isxdigit((unsigned char)c)) {
// len = data + PCB(1b) + CRC(2b)
switch(param_gethex_to_eol(cmd, cmdp, data, sizeof(data) - 1 - 2, &datalen)) {
case 1: