1 //===-- Unittests for f operations like fopen, flcose etc --------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #include "src/stdio/clearerr_unlocked.h" 10 #include "src/stdio/fclose.h" 11 #include "src/stdio/feof_unlocked.h" 12 #include "src/stdio/ferror_unlocked.h" 13 #include "src/stdio/flockfile.h" 14 #include "src/stdio/fopen.h" 15 #include "src/stdio/fread_unlocked.h" 16 #include "src/stdio/funlockfile.h" 17 #include "src/stdio/fwrite_unlocked.h" 18 #include "test/UnitTest/Test.h" 19 20 #include "src/errno/libc_errno.h" 21 22 TEST(LlvmLibcFILETest, UnlockedReadAndWrite) { 23 constexpr char fNAME[] = "testdata/unlocked_read_and_write.test"; 24 ::FILE *f = LIBC_NAMESPACE::fopen(fNAME, "w"); 25 ASSERT_FALSE(f == nullptr); 26 constexpr char CONTENT[] = "1234567890987654321"; 27 LIBC_NAMESPACE::flockfile(f); 28 ASSERT_EQ(sizeof(CONTENT) - 1, LIBC_NAMESPACE::fwrite_unlocked( 29 CONTENT, 1, sizeof(CONTENT) - 1, f)); 30 // Should be an error to read. 31 constexpr size_t READ_SIZE = 5; 32 char data[READ_SIZE * 2 + 1]; 33 data[READ_SIZE * 2] = '\0'; 34 35 ASSERT_EQ(size_t(0), 36 LIBC_NAMESPACE::fread_unlocked(data, 1, sizeof(READ_SIZE), f)); 37 ASSERT_NE(LIBC_NAMESPACE::ferror_unlocked(f), 0); 38 ASSERT_ERRNO_FAILURE(); 39 LIBC_NAMESPACE::libc_errno = 0; 40 41 LIBC_NAMESPACE::clearerr_unlocked(f); 42 ASSERT_EQ(LIBC_NAMESPACE::ferror_unlocked(f), 0); 43 44 LIBC_NAMESPACE::funlockfile(f); 45 ASSERT_EQ(0, LIBC_NAMESPACE::fclose(f)); 46 47 f = LIBC_NAMESPACE::fopen(fNAME, "r"); 48 ASSERT_FALSE(f == nullptr); 49 50 LIBC_NAMESPACE::flockfile(f); 51 ASSERT_EQ(LIBC_NAMESPACE::fread_unlocked(data, 1, READ_SIZE, f), READ_SIZE); 52 ASSERT_EQ(LIBC_NAMESPACE::fread_unlocked(data + READ_SIZE, 1, READ_SIZE, f), 53 READ_SIZE); 54 55 // Should be an error to write. 56 ASSERT_EQ(size_t(0), 57 LIBC_NAMESPACE::fwrite_unlocked(CONTENT, 1, sizeof(CONTENT), f)); 58 ASSERT_NE(LIBC_NAMESPACE::ferror_unlocked(f), 0); 59 ASSERT_ERRNO_FAILURE(); 60 LIBC_NAMESPACE::libc_errno = 0; 61 62 LIBC_NAMESPACE::clearerr_unlocked(f); 63 ASSERT_EQ(LIBC_NAMESPACE::ferror_unlocked(f), 0); 64 65 // Reading more should trigger eof. 66 char large_data[sizeof(CONTENT)]; 67 ASSERT_NE(sizeof(CONTENT), 68 LIBC_NAMESPACE::fread_unlocked(large_data, 1, sizeof(CONTENT), f)); 69 ASSERT_NE(LIBC_NAMESPACE::feof_unlocked(f), 0); 70 71 LIBC_NAMESPACE::funlockfile(f); 72 ASSERT_STREQ(data, "1234567890"); 73 74 ASSERT_EQ(LIBC_NAMESPACE::fclose(f), 0); 75 } 76