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#include <test.h>
#include <misc_lib.h>
#include <alloc.h>
#include <string_lib.h>
static void test_unsigned_modulus(void)
{
assert_int_equal(UnsignedModulus(0, 3), 0);
assert_int_equal(UnsignedModulus(1, 3), 1);
assert_int_equal(UnsignedModulus(2, 3), 2);
assert_int_equal(UnsignedModulus(3, 3), 0);
assert_int_equal(UnsignedModulus(4, 3), 1);
assert_int_equal(UnsignedModulus(-1, 3), 2);
assert_int_equal(UnsignedModulus(-2, 3), 1);
assert_int_equal(UnsignedModulus(-3, 3), 0);
assert_int_equal(UnsignedModulus(-4, 3), 2);
}
static void test_upper_power_of_two(void)
{
assert_int_equal(0, UpperPowerOfTwo(0));
assert_int_equal(1, UpperPowerOfTwo(1));
assert_int_equal(2, UpperPowerOfTwo(2));
assert_int_equal(4, UpperPowerOfTwo(3));
assert_int_equal(16, UpperPowerOfTwo(13));
}
/*
Generated in python3:
>>> for i in range(64): print("{:26} || \\".format("(x == 0x{:x})".format(2**i)))
*/
#define ISPOW2_FORSURE(x) \
((x > 0) && \
( \
(x == 0x1) || \
(x == 0x2) || \
(x == 0x4) || \
(x == 0x8) || \
(x == 0x10) || \
(x == 0x20) || \
(x == 0x40) || \
(x == 0x80) || \
(x == 0x100) || \
(x == 0x200) || \
(x == 0x400) || \
(x == 0x800) || \
(x == 0x1000) || \
(x == 0x2000) || \
(x == 0x4000) || \
(x == 0x8000) || \
(x == 0x10000) || \
(x == 0x20000) || \
(x == 0x40000) || \
(x == 0x80000) || \
(x == 0x100000) || \
(x == 0x200000) || \
(x == 0x400000) || \
(x == 0x800000) || \
(x == 0x1000000) || \
(x == 0x2000000) || \
(x == 0x4000000) || \
(x == 0x8000000) || \
(x == 0x10000000) || \
(x == 0x20000000) || \
(x == 0x40000000) || \
(x == 0x80000000) || \
(x == 0x100000000) || \
(x == 0x200000000) || \
(x == 0x400000000) || \
(x == 0x800000000) || \
(x == 0x1000000000) || \
(x == 0x2000000000) || \
(x == 0x4000000000) || \
(x == 0x8000000000) || \
(x == 0x10000000000) || \
(x == 0x20000000000) || \
(x == 0x40000000000) || \
(x == 0x80000000000) || \
(x == 0x100000000000) || \
(x == 0x200000000000) || \
(x == 0x400000000000) || \
(x == 0x800000000000) || \
(x == 0x1000000000000) || \
(x == 0x2000000000000) || \
(x == 0x4000000000000) || \
(x == 0x8000000000000) || \
(x == 0x10000000000000) || \
(x == 0x20000000000000) || \
(x == 0x40000000000000) || \
(x == 0x80000000000000) || \
(x == 0x100000000000000) || \
(x == 0x200000000000000) || \
(x == 0x400000000000000) || \
(x == 0x800000000000000) || \
(x == 0x1000000000000000) || \
(x == 0x2000000000000000) || \
(x == 0x4000000000000000) || \
(x == 0x8000000000000000) \
))
long count_pow2;
#define TYPED_TEST_ISPOW2(orig, T) \
do { \
typeof(T) t = (typeof(T)) orig; \
\
bool ispow = ISPOW2(t); \
bool ispow_forsure = ISPOW2_FORSURE(t); \
\
if (ispow_forsure && !ispow) \
{ \
printf("ISPOW2 FAIL for %jd (original value %jd), should be true but is false!\n", \
(intmax_t) t, (intmax_t) orig); \
assert_true(false); \
} \
else if (!ispow_forsure && ispow) \
{ \
printf("ISPOW2 FAIL for %jd (original value %jd), should be false but is true!\n", \
(intmax_t) t, (intmax_t) orig); \
assert_true(false); \
} \
if (ispow) \
{ \
count_pow2++; \
} \
} while(false);
#if 0
else \
{ \
printf("PASS: ISPOW2(%jd) == %s\n", \
(intmax_t) t, \
ispow ? "true" : "false"); \
}
#endif
#define TEST_COUNT 100000
static void test_rand_ISPOW2(void)
{
for (int i = 0; i < TEST_COUNT; i++)
{
/* drand48() doesn't give you 64 bits of randomness. */
/* Get two numbers between [0,1) */
double d1 = drand48();
double d2 = drand48();
/* Spread them over the maximum range for 32 bits. */
uint64_t u1 = d1 * UINT32_MAX;
uint64_t u2 = d2 * UINT32_MAX;
/* Compose them to one fully random 64 bit integer. */
uint64_t x = u1 | (u2 << 32);
// printf("====> testing %20ju, signed %20jd, hex 0x%016jx\n",
// (uintmax_t) x, (uintmax_t) x, (uintmax_t) x);
TYPED_TEST_ISPOW2(x, uint8_t);
TYPED_TEST_ISPOW2(x, uint16_t);
TYPED_TEST_ISPOW2(x, uint32_t);
TYPED_TEST_ISPOW2(x, uint64_t);
TYPED_TEST_ISPOW2(x, int8_t);
TYPED_TEST_ISPOW2(x, int16_t);
TYPED_TEST_ISPOW2(x, int32_t);
TYPED_TEST_ISPOW2(x, int64_t);
TYPED_TEST_ISPOW2(x, intmax_t);
TYPED_TEST_ISPOW2(x, uintmax_t);
TYPED_TEST_ISPOW2(x, char);
TYPED_TEST_ISPOW2(x, unsigned char);
TYPED_TEST_ISPOW2(x, short int);
TYPED_TEST_ISPOW2(x, unsigned short int);
TYPED_TEST_ISPOW2(x, int);
TYPED_TEST_ISPOW2(x, unsigned int);
TYPED_TEST_ISPOW2(x, long int);
TYPED_TEST_ISPOW2(x, unsigned long int);
TYPED_TEST_ISPOW2(x, long long int);
TYPED_TEST_ISPOW2(x, unsigned long long int);
}
printf(" Tested ISPOW2() with %8d numbers in various type combinations"
" out of which %8ld where power of 2.\n",
TEST_COUNT, count_pow2);
}
static void test_ISPOW2(void)
{
assert_true(ISPOW2(1));
assert_true(ISPOW2(0x80000000));
assert_false(ISPOW2(0));
assert_false(ISPOW2(0xFFFFFFFF));
}
static void test_ABS(void)
{
assert_int_equal(ABS(-2), 2);
assert_int_equal(ABS(-1), 1);
assert_int_equal(ABS( 0), 0);
assert_int_equal(ABS( 1), 1);
assert_int_equal(ABS( 2), 2);
}
static void test_putenv_wrapper(void)
{
assert_true(getenv("UNIT_TEST_VAR") == NULL);
putenv_wrapper("UNIT_TEST_VAR=VALUE");
assert_true(getenv("UNIT_TEST_VAR") != NULL);
assert_string_equal(getenv("UNIT_TEST_VAR"), "VALUE");
putenv_wrapper("UNIT_TEST_VAR=NEW_VALUE");
assert_true(getenv("UNIT_TEST_VAR") != NULL);
assert_string_equal(getenv("UNIT_TEST_VAR"), "NEW_VALUE");
unsetenv("UNIT_TEST_VAR");
assert_true(getenv("UNIT_TEST_VAR") == NULL);
}
static void test_setenv_wrapper(void)
{
assert_true(getenv("UNIT_TEST_VAR") == NULL);
setenv_wrapper("UNIT_TEST_VAR", "VALUE", 0);
assert_true(getenv("UNIT_TEST_VAR") != NULL);
assert_string_equal(getenv("UNIT_TEST_VAR"), "VALUE");
setenv_wrapper("UNIT_TEST_VAR", "NEW_VALUE", 1);
assert_true(getenv("UNIT_TEST_VAR") != NULL);
assert_string_equal(getenv("UNIT_TEST_VAR"), "NEW_VALUE");
setenv_wrapper("UNIT_TEST_VAR", "NO_OVERWRITE", 0);
assert_true(getenv("UNIT_TEST_VAR") != NULL);
assert_string_equal(getenv("UNIT_TEST_VAR"), "NEW_VALUE");
unsetenv("UNIT_TEST_VAR");
assert_true(getenv("UNIT_TEST_VAR") == NULL);
}
int main()
{
srand48(time(NULL));
PRINT_TEST_BANNER();
const UnitTest tests[] =
{
unit_test(test_unsigned_modulus),
unit_test(test_upper_power_of_two),
unit_test(test_rand_ISPOW2),
unit_test(test_ISPOW2),
unit_test(test_ABS),
unit_test(test_putenv_wrapper),
unit_test(test_setenv_wrapper),
};
return run_tests(tests);
}
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