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//===-- Unittests for f operations like fopen, flcose etc --------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "src/stdio/clearerr_unlocked.h"
#include "src/stdio/fclose.h"
#include "src/stdio/feof_unlocked.h"
#include "src/stdio/ferror_unlocked.h"
#include "src/stdio/flockfile.h"
#include "src/stdio/fopen.h"
#include "src/stdio/fread_unlocked.h"
#include "src/stdio/funlockfile.h"
#include "src/stdio/fwrite_unlocked.h"
#include "test/UnitTest/ErrnoCheckingTest.h"
#include "test/UnitTest/Test.h"
using LlvmLibcFILETest = LIBC_NAMESPACE::testing::ErrnoCheckingTest;
TEST_F(LlvmLibcFILETest, UnlockedReadAndWrite) {
constexpr char fNAME[] =
APPEND_LIBC_TEST("testdata/unlocked_read_and_write.test");
::FILE *f = LIBC_NAMESPACE::fopen(fNAME, "w");
ASSERT_FALSE(f == nullptr);
constexpr char CONTENT[] = "1234567890987654321";
LIBC_NAMESPACE::flockfile(f);
ASSERT_EQ(sizeof(CONTENT) - 1, LIBC_NAMESPACE::fwrite_unlocked(
CONTENT, 1, sizeof(CONTENT) - 1, f));
// Should be an error to read.
constexpr size_t READ_SIZE = 5;
char data[READ_SIZE * 2 + 1];
data[READ_SIZE * 2] = '\0';
ASSERT_EQ(size_t(0),
LIBC_NAMESPACE::fread_unlocked(data, 1, sizeof(READ_SIZE), f));
ASSERT_NE(LIBC_NAMESPACE::ferror_unlocked(f), 0);
ASSERT_ERRNO_FAILURE();
LIBC_NAMESPACE::clearerr_unlocked(f);
ASSERT_EQ(LIBC_NAMESPACE::ferror_unlocked(f), 0);
LIBC_NAMESPACE::funlockfile(f);
ASSERT_EQ(0, LIBC_NAMESPACE::fclose(f));
f = LIBC_NAMESPACE::fopen(fNAME, "r");
ASSERT_FALSE(f == nullptr);
LIBC_NAMESPACE::flockfile(f);
ASSERT_EQ(LIBC_NAMESPACE::fread_unlocked(data, 1, READ_SIZE, f), READ_SIZE);
ASSERT_EQ(LIBC_NAMESPACE::fread_unlocked(data + READ_SIZE, 1, READ_SIZE, f),
READ_SIZE);
// Should be an error to write.
ASSERT_EQ(size_t(0),
LIBC_NAMESPACE::fwrite_unlocked(CONTENT, 1, sizeof(CONTENT), f));
ASSERT_NE(LIBC_NAMESPACE::ferror_unlocked(f), 0);
ASSERT_ERRNO_FAILURE();
LIBC_NAMESPACE::clearerr_unlocked(f);
ASSERT_EQ(LIBC_NAMESPACE::ferror_unlocked(f), 0);
// Reading more should trigger eof.
char large_data[sizeof(CONTENT)];
ASSERT_NE(sizeof(CONTENT),
LIBC_NAMESPACE::fread_unlocked(large_data, 1, sizeof(CONTENT), f));
ASSERT_NE(LIBC_NAMESPACE::feof_unlocked(f), 0);
LIBC_NAMESPACE::funlockfile(f);
ASSERT_STREQ(data, "1234567890");
ASSERT_EQ(LIBC_NAMESPACE::fclose(f), 0);
}
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