iso14a reader patches [Hagen Fritsch]

client/util.c

@@ -0,0 +1,23 @@
+#include <stdio.h>
+#include <stdint.h>
+
+void print_hex(const uint8_t * data, const size_t len)
+{
+	size_t i;
+
+	for (i=0; i < len; i++)
+		printf("%02x ", data[i]);
+
+	printf("\n");
+}
+
+char * sprint_hex(const uint8_t * data, const size_t len) {
+	static char buf[1024];
+	char * tmp = buf;
+	size_t i;
+
+	for (i=0; i < len && i < 1024/3; i++, tmp += 3)
+		sprintf(tmp, "%02x ", data[i]);
+
+	return buf;
+}