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//===-- Unittests for fgetc -----------------------------------------------===//
//
// 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.h"
#include "src/stdio/fclose.h"
#include "src/stdio/feof.h"
#include "src/stdio/ferror.h"
#include "src/stdio/fgetc.h"
#include "src/stdio/fopen.h"
#include "src/stdio/fwrite.h"
#include "src/stdio/getc.h"
#include "test/UnitTest/Test.h"
#include "src/errno/libc_errno.h"
#include <stdio.h>
class LlvmLibcGetcTest : public LIBC_NAMESPACE::testing::Test {
public:
using GetcFunc = int(FILE *);
void test_with_func(GetcFunc *func, const char *filename) {
::FILE *file = LIBC_NAMESPACE::fopen(filename, "w");
ASSERT_FALSE(file == nullptr);
constexpr char CONTENT[] = "123456789";
constexpr size_t WRITE_SIZE = sizeof(CONTENT) - 1;
ASSERT_EQ(WRITE_SIZE, LIBC_NAMESPACE::fwrite(CONTENT, 1, WRITE_SIZE, file));
// This is a write-only file so reads should fail.
ASSERT_EQ(func(file), EOF);
// This is an error and not a real EOF.
ASSERT_EQ(LIBC_NAMESPACE::feof(file), 0);
ASSERT_NE(LIBC_NAMESPACE::ferror(file), 0);
LIBC_NAMESPACE::libc_errno = 0;
ASSERT_EQ(0, LIBC_NAMESPACE::fclose(file));
file = LIBC_NAMESPACE::fopen(filename, "r");
ASSERT_FALSE(file == nullptr);
for (size_t i = 0; i < WRITE_SIZE; ++i) {
int c = func(file);
ASSERT_EQ(c, int('1' + i));
}
// Reading more should return EOF but not set error.
ASSERT_EQ(func(file), EOF);
ASSERT_NE(LIBC_NAMESPACE::feof(file), 0);
ASSERT_EQ(LIBC_NAMESPACE::ferror(file), 0);
ASSERT_EQ(0, LIBC_NAMESPACE::fclose(file));
}
};
TEST_F(LlvmLibcGetcTest, WriteAndReadCharactersWithFgetc) {
test_with_func(&LIBC_NAMESPACE::fgetc, "testdata/fgetc.test");
}
TEST_F(LlvmLibcGetcTest, WriteAndReadCharactersWithGetc) {
test_with_func(&LIBC_NAMESPACE::getc, "testdata/getc.test");
}
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