| //===-- Unittests for setbuf ----------------------------------------------===// |
| // |
| // 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/fclose.h" |
| #include "src/stdio/fopen.h" |
| #include "src/stdio/fread.h" |
| #include "src/stdio/fwrite.h" |
| #include "src/stdio/setbuf.h" |
| #include "src/stdio/ungetc.h" |
| #include "test/UnitTest/Test.h" |
| |
| #include <stdio.h> |
| |
| TEST(LlvmLibcSetbufTest, DefaultBufsize) { |
| // The idea in this test is to change the buffer after opening a file and |
| // ensure that read and write work as expected. |
| constexpr char FILENAME[] = "testdata/setbuf_test_default_bufsize.test"; |
| ::FILE *file = LIBC_NAMESPACE::fopen(FILENAME, "w"); |
| ASSERT_FALSE(file == nullptr); |
| char buffer[BUFSIZ]; |
| LIBC_NAMESPACE::setbuf(file, buffer); |
| constexpr char CONTENT[] = "abcdef"; |
| constexpr size_t CONTENT_SIZE = sizeof(CONTENT); |
| ASSERT_EQ(CONTENT_SIZE, |
| LIBC_NAMESPACE::fwrite(CONTENT, 1, CONTENT_SIZE, file)); |
| ASSERT_EQ(0, LIBC_NAMESPACE::fclose(file)); |
| |
| file = LIBC_NAMESPACE::fopen(FILENAME, "r"); |
| LIBC_NAMESPACE::setbuf(file, buffer); |
| ASSERT_FALSE(file == nullptr); |
| char data[CONTENT_SIZE]; |
| ASSERT_EQ(LIBC_NAMESPACE::fread(&data, 1, CONTENT_SIZE, file), CONTENT_SIZE); |
| ASSERT_STREQ(CONTENT, data); |
| ASSERT_EQ(0, LIBC_NAMESPACE::fclose(file)); |
| } |
| |
| TEST(LlvmLibcSetbufTest, NullBuffer) { |
| // The idea in this test is that we set a null buffer and ensure that |
| // everything works correctly. |
| constexpr char FILENAME[] = "testdata/setbuf_test_null_buffer.test"; |
| ::FILE *file = LIBC_NAMESPACE::fopen(FILENAME, "w"); |
| ASSERT_FALSE(file == nullptr); |
| LIBC_NAMESPACE::setbuf(file, nullptr); |
| constexpr char CONTENT[] = "abcdef"; |
| constexpr size_t CONTENT_SIZE = sizeof(CONTENT); |
| ASSERT_EQ(CONTENT_SIZE, |
| LIBC_NAMESPACE::fwrite(CONTENT, 1, CONTENT_SIZE, file)); |
| ASSERT_EQ(0, LIBC_NAMESPACE::fclose(file)); |
| |
| file = LIBC_NAMESPACE::fopen(FILENAME, "r"); |
| LIBC_NAMESPACE::setbuf(file, nullptr); |
| ASSERT_FALSE(file == nullptr); |
| char data[CONTENT_SIZE]; |
| ASSERT_EQ(LIBC_NAMESPACE::fread(&data, 1, CONTENT_SIZE, file), CONTENT_SIZE); |
| ASSERT_STREQ(CONTENT, data); |
| |
| // Ensure that ungetc also works. |
| char unget_char = 'z'; |
| ASSERT_EQ(int(unget_char), LIBC_NAMESPACE::ungetc(unget_char, file)); |
| char c; |
| ASSERT_EQ(LIBC_NAMESPACE::fread(&c, 1, 1, file), size_t(1)); |
| ASSERT_EQ(c, unget_char); |
| |
| ASSERT_EQ(0, LIBC_NAMESPACE::fclose(file)); |
| } |