#include <config.h>
+#include <getopt.h>
#include <inttypes.h>
#include <limits.h>
#include <stdio.h>
#include "command-line.h"
#include "random.h"
#include "util.h"
+#include "vlog.h"
+
+#undef NDEBUG
+#include <assert.h>
static void
check_log_2_floor(uint32_t x, int n)
check_ctz(0, 32);
}
+static void
+shuffle(unsigned int *p, size_t n)
+{
+ for (; n > 1; n--, p++) {
+ unsigned int *q = &p[rand() % n];
+ unsigned int tmp = *p;
+ *p = *q;
+ *q = tmp;
+ }
+}
+
+static void
+check_popcount(uint32_t x, int n)
+{
+ if (popcount(x) != n) {
+ fprintf(stderr, "popcount(%#"PRIx32") is %d but should be %d\n",
+ x, popcount(x), n);
+ abort();
+ }
+}
+
+static void
+test_popcount(int argc OVS_UNUSED, char *argv[] OVS_UNUSED)
+{
+ unsigned int bits[32];
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(bits); i++) {
+ bits[i] = 1u << i;
+ }
+
+ check_popcount(0, 0);
+
+ for (i = 0; i < 1000; i++) {
+ uint32_t x = 0;
+ int j;
+
+ shuffle(bits, ARRAY_SIZE(bits));
+ for (j = 0; j < 32; j++) {
+ x |= bits[j];
+ check_popcount(x, j + 1);
+ }
+ assert(x == UINT32_MAX);
+
+ shuffle(bits, ARRAY_SIZE(bits));
+ for (j = 31; j >= 0; j--) {
+ x &= ~bits[j];
+ check_popcount(x, j);
+ }
+ assert(x == 0);
+ }
+}
+
/* Returns the sum of the squares of the first 'n' positive integers. */
static unsigned int
sum_of_squares(int n)
free(target);
}
}
+
+static void
+test_assert(int argc OVS_UNUSED, char *argv[] OVS_UNUSED)
+{
+ ovs_assert(false);
+}
\f
static const struct command commands[] = {
{"ctz", 0, 0, test_ctz},
+ {"popcount", 0, 0, test_popcount},
{"log_2_floor", 0, 0, test_log_2_floor},
{"bitwise_copy", 0, 0, test_bitwise_copy},
{"bitwise_zero", 0, 0, test_bitwise_zero},
{"bitwise_one", 0, 0, test_bitwise_one},
{"bitwise_is_all_zeros", 0, 0, test_bitwise_is_all_zeros},
{"follow-symlinks", 1, INT_MAX, test_follow_symlinks},
+ {"assert", 0, 0, test_assert},
{NULL, 0, 0, NULL},
};
+static void
+parse_options(int argc, char *argv[])
+{
+ enum {
+ VLOG_OPTION_ENUMS
+ };
+ static struct option long_options[] = {
+ VLOG_LONG_OPTIONS,
+ {NULL, 0, NULL, 0},
+ };
+ char *short_options = long_options_to_short_options(long_options);
+
+ for (;;) {
+ int c = getopt_long(argc, argv, short_options, long_options, NULL);
+ if (c == -1) {
+ break;
+ }
+
+ switch (c) {
+ VLOG_OPTION_HANDLERS
+
+ case '?':
+ exit(EXIT_FAILURE);
+
+ default:
+ abort();
+ }
+ }
+ free(short_options);
+}
+
int
main(int argc, char *argv[])
{
set_program_name(argv[0]);
- run_command(argc - 1, argv + 1, commands);
+ parse_options(argc, argv);
+ run_command(argc - optind, argv + optind, commands);
return 0;
}