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/*
* Copyright (C) 2012 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <gtest/gtest.h>
#include <errno.h>
#include <libgen.h>
#include <limits.h>
#include <stdint.h>
#include <stdlib.h>
TEST(stdlib, drand48) {
srand48(0x01020304);
EXPECT_DOUBLE_EQ(0.65619299195623526, drand48());
EXPECT_DOUBLE_EQ(0.18522597229772941, drand48());
EXPECT_DOUBLE_EQ(0.42015087072844537, drand48());
EXPECT_DOUBLE_EQ(0.061637783047395089, drand48());
}
TEST(stdlib, lrand48_random_rand) {
srand48(0x01020304);
EXPECT_EQ(1409163720, lrand48());
EXPECT_EQ(397769746, lrand48());
EXPECT_EQ(902267124, lrand48());
EXPECT_EQ(132366131, lrand48());
#if __BIONIC__
// On bionic, random(3) is equivalent to lrand48...
srandom(0x01020304);
EXPECT_EQ(1409163720, random());
EXPECT_EQ(397769746, random());
EXPECT_EQ(902267124, random());
EXPECT_EQ(132366131, random());
// ...and rand(3) is the bottom 32 bits.
srand(0x01020304);
EXPECT_EQ(static_cast<int>(1409163720), rand());
EXPECT_EQ(static_cast<int>(397769746), rand());
EXPECT_EQ(static_cast<int>(902267124), rand());
EXPECT_EQ(static_cast<int>(132366131), rand());
#endif
}
TEST(stdlib, mrand48) {
srand48(0x01020304);
EXPECT_EQ(-1476639856, mrand48());
EXPECT_EQ(795539493, mrand48());
EXPECT_EQ(1804534249, mrand48());
EXPECT_EQ(264732262, mrand48());
}
TEST(stdlib, posix_memalign) {
void* p;
ASSERT_EQ(0, posix_memalign(&p, 512, 128));
ASSERT_EQ(0U, reinterpret_cast<uintptr_t>(p) % 512);
free(p);
// Can't align to a non-power of 2.
ASSERT_EQ(EINVAL, posix_memalign(&p, 81, 128));
}
TEST(stdlib, realpath__NULL_filename) {
errno = 0;
char* p = realpath(NULL, NULL);
ASSERT_TRUE(p == NULL);
ASSERT_EQ(EINVAL, errno);
}
TEST(stdlib, realpath__empty_filename) {
errno = 0;
char* p = realpath("", NULL);
ASSERT_TRUE(p == NULL);
ASSERT_EQ(ENOENT, errno);
}
TEST(stdlib, realpath__ENOENT) {
errno = 0;
char* p = realpath("/this/directory/path/almost/certainly/does/not/exist", NULL);
ASSERT_TRUE(p == NULL);
ASSERT_EQ(ENOENT, errno);
}
TEST(stdlib, realpath) {
// Get the name of this executable.
char executable_path[PATH_MAX];
int rc = readlink("/proc/self/exe", executable_path, sizeof(executable_path));
ASSERT_NE(rc, -1);
executable_path[rc] = '\0';
char buf[PATH_MAX + 1];
char* p = realpath("/proc/self/exe", buf);
ASSERT_STREQ(executable_path, p);
p = realpath("/proc/self/exe", NULL);
ASSERT_STREQ(executable_path, p);
free(p);
}
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