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#include "test/jemalloc_test.h"
TEST_BEGIN(test_prng_lg_range_u32) {
uint32_t sa, sb;
uint32_t ra, rb;
unsigned lg_range;
sa = 42;
ra = prng_lg_range_u32(&sa, 32);
sa = 42;
rb = prng_lg_range_u32(&sa, 32);
expect_u32_eq(ra, rb,
"Repeated generation should produce repeated results");
sb = 42;
rb = prng_lg_range_u32(&sb, 32);
expect_u32_eq(ra, rb,
"Equivalent generation should produce equivalent results");
sa = 42;
ra = prng_lg_range_u32(&sa, 32);
rb = prng_lg_range_u32(&sa, 32);
expect_u32_ne(ra, rb,
"Full-width results must not immediately repeat");
sa = 42;
ra = prng_lg_range_u32(&sa, 32);
for (lg_range = 31; lg_range > 0; lg_range--) {
sb = 42;
rb = prng_lg_range_u32(&sb, lg_range);
expect_u32_eq((rb & (UINT32_C(0xffffffff) << lg_range)),
0, "High order bits should be 0, lg_range=%u", lg_range);
expect_u32_eq(rb, (ra >> (32 - lg_range)),
"Expected high order bits of full-width result, "
"lg_range=%u", lg_range);
}
}
TEST_END
TEST_BEGIN(test_prng_lg_range_u64) {
uint64_t sa, sb, ra, rb;
unsigned lg_range;
sa = 42;
ra = prng_lg_range_u64(&sa, 64);
sa = 42;
rb = prng_lg_range_u64(&sa, 64);
expect_u64_eq(ra, rb,
"Repeated generation should produce repeated results");
sb = 42;
rb = prng_lg_range_u64(&sb, 64);
expect_u64_eq(ra, rb,
"Equivalent generation should produce equivalent results");
sa = 42;
ra = prng_lg_range_u64(&sa, 64);
rb = prng_lg_range_u64(&sa, 64);
expect_u64_ne(ra, rb,
"Full-width results must not immediately repeat");
sa = 42;
ra = prng_lg_range_u64(&sa, 64);
for (lg_range = 63; lg_range > 0; lg_range--) {
sb = 42;
rb = prng_lg_range_u64(&sb, lg_range);
expect_u64_eq((rb & (UINT64_C(0xffffffffffffffff) << lg_range)),
0, "High order bits should be 0, lg_range=%u", lg_range);
expect_u64_eq(rb, (ra >> (64 - lg_range)),
"Expected high order bits of full-width result, "
"lg_range=%u", lg_range);
}
}
TEST_END
TEST_BEGIN(test_prng_lg_range_zu) {
size_t sa, sb;
size_t ra, rb;
unsigned lg_range;
sa = 42;
ra = prng_lg_range_zu(&sa, ZU(1) << (3 + LG_SIZEOF_PTR));
sa = 42;
rb = prng_lg_range_zu(&sa, ZU(1) << (3 + LG_SIZEOF_PTR));
expect_zu_eq(ra, rb,
"Repeated generation should produce repeated results");
sb = 42;
rb = prng_lg_range_zu(&sb, ZU(1) << (3 + LG_SIZEOF_PTR));
expect_zu_eq(ra, rb,
"Equivalent generation should produce equivalent results");
sa = 42;
ra = prng_lg_range_zu(&sa, ZU(1) << (3 + LG_SIZEOF_PTR));
rb = prng_lg_range_zu(&sa, ZU(1) << (3 + LG_SIZEOF_PTR));
expect_zu_ne(ra, rb,
"Full-width results must not immediately repeat");
sa = 42;
ra = prng_lg_range_zu(&sa, ZU(1) << (3 + LG_SIZEOF_PTR));
for (lg_range = (ZU(1) << (3 + LG_SIZEOF_PTR)) - 1; lg_range > 0;
lg_range--) {
sb = 42;
rb = prng_lg_range_zu(&sb, lg_range);
expect_zu_eq((rb & (SIZE_T_MAX << lg_range)),
0, "High order bits should be 0, lg_range=%u", lg_range);
expect_zu_eq(rb, (ra >> ((ZU(1) << (3 + LG_SIZEOF_PTR)) -
lg_range)), "Expected high order bits of full-width "
"result, lg_range=%u", lg_range);
}
}
TEST_END
TEST_BEGIN(test_prng_range_u32) {
uint32_t range;
const uint32_t max_range = 10000000;
const uint32_t range_step = 97;
const unsigned nreps = 10;
for (range = 2; range < max_range; range += range_step) {
uint32_t s;
unsigned rep;
s = range;
for (rep = 0; rep < nreps; rep++) {
uint32_t r = prng_range_u32(&s, range);
expect_u32_lt(r, range, "Out of range");
}
}
}
TEST_END
TEST_BEGIN(test_prng_range_u64) {
uint64_t range;
const uint64_t max_range = 10000000;
const uint64_t range_step = 97;
const unsigned nreps = 10;
for (range = 2; range < max_range; range += range_step) {
uint64_t s;
unsigned rep;
s = range;
for (rep = 0; rep < nreps; rep++) {
uint64_t r = prng_range_u64(&s, range);
expect_u64_lt(r, range, "Out of range");
}
}
}
TEST_END
TEST_BEGIN(test_prng_range_zu) {
size_t range;
const size_t max_range = 10000000;
const size_t range_step = 97;
const unsigned nreps = 10;
for (range = 2; range < max_range; range += range_step) {
size_t s;
unsigned rep;
s = range;
for (rep = 0; rep < nreps; rep++) {
size_t r = prng_range_zu(&s, range);
expect_zu_lt(r, range, "Out of range");
}
}
}
TEST_END
int
main(void) {
return test_no_reentrancy(
test_prng_lg_range_u32,
test_prng_lg_range_u64,
test_prng_lg_range_zu,
test_prng_range_u32,
test_prng_range_u64,
test_prng_range_zu);
}
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