opensc-sys 0.1.1

FFI bindings to OpenSC
Documentation 
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/* Copyright (C) 2001  Juha Yrjölä <juha.yrjola@iki.fi> 
 * All rights reserved.
 */

#include "config.h"

#include <errno.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef HAVE_SYS_TIME_H
#include <sys/time.h>
#endif

#include "libopensc/opensc.h"
#include "sc-test.h"

int main(int argc, char *argv[])
{
	int i, c, r, cnt = 3, freq[39];
	struct timeval tv1, tv2;
	u8 buf[14];

	sc_test_init(&argc, argv);
	for (i = 0; i < 39; i++)
		freq[i] = 0;
	c = 0;
	while (cnt) {
		u8 nbuf[39];

		for (i = 0; i < 39; i++) {
			nbuf[i] = i + 1;
		}
		if (c == 0) {
			if (0 != gettimeofday(&tv1, NULL)) {
				fprintf(stderr, "gettimeofday() failed: %s\n", strerror(errno));
				return 1;
			}
		}
		sc_lock(card);
		r = sc_get_challenge(card, buf, 14);
		sc_unlock(card);
		if (r == 0) {
			int left = 39;

			printf("Lottery: ");
			for (i = 0; i < 7; i++) {
				unsigned short s = buf[2 * i] + (buf[2 * i + 1] << 8);
				int lot = s % left;
				int num = nbuf[lot];

				nbuf[lot] = nbuf[left - 1];
				left--;
				freq[num - 1]++;
				printf("%3d ", num);
			}
			printf("\n");
		} else {
			fprintf(stderr, "sc_get_challenge() failed: %s\n", sc_strerror(r));
			sc_test_cleanup();
			return 1;
		}
		c++;
		if (c == 50) {
			unsigned long long foo, foo2;

			gettimeofday(&tv2, NULL);
			foo = tv2.tv_sec * 1000 + tv2.tv_usec / 1000;
			foo2 = tv1.tv_sec * 1000 + tv1.tv_usec / 1000;
			printf("Time per one: %lld ms\n", (foo - foo2) / 50);
			printf("Frequencies:\n");
			for (i = 0; i < 39; i++) {
				printf("%3d: %-5d", i + 1, freq[i]);
				if (((i + 1) % 10) == 0)
					printf("\n");
			}
			printf("\n");
			c = 0;
			cnt--;
		}
	}
	sc_test_cleanup();
	return 0;
}