1 //===-- Unittests for fscanf ----------------------------------------------===// 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/__support/CPP/string_view.h" 10 11 #ifndef LIBC_COPT_STDIO_USE_SYSTEM_FILE 12 #include "src/stdio/fclose.h" 13 #include "src/stdio/ferror.h" 14 #include "src/stdio/fopen.h" 15 #include "src/stdio/fwrite.h" 16 #endif // LIBC_COPT_STDIO_USE_SYSTEM_FILE 17 18 #include "src/stdio/fscanf.h" 19 20 #include "test/UnitTest/Test.h" 21 22 namespace scanf_test { 23 #ifndef LIBC_COPT_STDIO_USE_SYSTEM_FILE 24 using LIBC_NAMESPACE::fclose; 25 using LIBC_NAMESPACE::ferror; 26 using LIBC_NAMESPACE::fopen; 27 using LIBC_NAMESPACE::fwrite; 28 #else // defined(LIBC_COPT_STDIO_USE_SYSTEM_FILE) 29 using ::fclose; 30 using ::ferror; 31 using ::fopen; 32 using ::fwrite; 33 #endif // LIBC_COPT_STDIO_USE_SYSTEM_FILE 34 } // namespace scanf_test 35 36 TEST(LlvmLibcFScanfTest, WriteToFile) { 37 const char *FILENAME = "fscanf_output.test"; 38 auto FILE_PATH = libc_make_test_file_path(FILENAME); 39 ::FILE *file = scanf_test::fopen(FILE_PATH, "w"); 40 ASSERT_FALSE(file == nullptr); 41 42 int read; 43 44 constexpr char simple[] = "A simple string with no conversions.\n"; 45 46 ASSERT_EQ(sizeof(simple) - 1, 47 scanf_test::fwrite(simple, 1, sizeof(simple) - 1, file)); 48 49 constexpr char numbers[] = "1234567890\n"; 50 51 ASSERT_EQ(sizeof(numbers) - 1, 52 scanf_test::fwrite(numbers, 1, sizeof(numbers) - 1, file)); 53 54 constexpr char numbers_and_more[] = "1234 and more\n"; 55 56 ASSERT_EQ(sizeof(numbers_and_more) - 1, 57 scanf_test::fwrite(numbers_and_more, 1, 58 sizeof(numbers_and_more) - 1, file)); 59 60 read = LIBC_NAMESPACE::fscanf(file, 61 "Reading from a write-only file should fail."); 62 EXPECT_LT(read, 0); 63 64 ASSERT_EQ(0, scanf_test::fclose(file)); 65 66 file = scanf_test::fopen(FILE_PATH, "r"); 67 ASSERT_FALSE(file == nullptr); 68 69 char data[50]; 70 read = LIBC_NAMESPACE::fscanf(file, "%[A-Za-z .\n]", data); 71 ASSERT_EQ(read, 1); 72 ASSERT_STREQ(simple, data); 73 74 read = LIBC_NAMESPACE::fscanf(file, "%s", data); 75 ASSERT_EQ(read, 1); 76 ASSERT_EQ(LIBC_NAMESPACE::cpp::string_view(numbers, 10), 77 LIBC_NAMESPACE::cpp::string_view(data)); 78 79 // The format string starts with a space to handle the fact that the %s leaves 80 // a trailing \n and %c doesn't strip leading whitespace. 81 read = LIBC_NAMESPACE::fscanf(file, " %50c", data); 82 ASSERT_EQ(read, 1); 83 ASSERT_EQ( 84 LIBC_NAMESPACE::cpp::string_view(numbers_and_more), 85 LIBC_NAMESPACE::cpp::string_view(data, sizeof(numbers_and_more) - 1)); 86 87 ASSERT_EQ(scanf_test::ferror(file), 0); 88 ASSERT_EQ(scanf_test::fclose(file), 0); 89 } 90