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 #include <stdio.h>
23
24 namespace scanf_test {
25 #ifndef LIBC_COPT_STDIO_USE_SYSTEM_FILE
26 using LIBC_NAMESPACE::fclose;
27 using LIBC_NAMESPACE::ferror;
28 using LIBC_NAMESPACE::fopen;
29 using LIBC_NAMESPACE::fwrite;
30 #else // defined(LIBC_COPT_STDIO_USE_SYSTEM_FILE)
31 using ::fclose;
32 using ::ferror;
33 using ::fopen;
34 using ::fwrite;
35 #endif // LIBC_COPT_STDIO_USE_SYSTEM_FILE
36 } // namespace scanf_test
37
TEST(LlvmLibcFScanfTest,WriteToFile)38 TEST(LlvmLibcFScanfTest, WriteToFile) {
39 const char *FILENAME = "fscanf_output.test";
40 auto FILE_PATH = libc_make_test_file_path(FILENAME);
41 ::FILE *file = scanf_test::fopen(FILE_PATH, "w");
42 ASSERT_FALSE(file == nullptr);
43
44 int read;
45
46 constexpr char simple[] = "A simple string with no conversions.\n";
47
48 ASSERT_EQ(sizeof(simple) - 1,
49 scanf_test::fwrite(simple, 1, sizeof(simple) - 1, file));
50
51 constexpr char numbers[] = "1234567890\n";
52
53 ASSERT_EQ(sizeof(numbers) - 1,
54 scanf_test::fwrite(numbers, 1, sizeof(numbers) - 1, file));
55
56 constexpr char numbers_and_more[] = "1234 and more\n";
57
58 ASSERT_EQ(sizeof(numbers_and_more) - 1,
59 scanf_test::fwrite(numbers_and_more, 1,
60 sizeof(numbers_and_more) - 1, file));
61
62 read = LIBC_NAMESPACE::fscanf(file,
63 "Reading from a write-only file should fail.");
64 EXPECT_LT(read, 0);
65
66 ASSERT_EQ(0, scanf_test::fclose(file));
67
68 file = scanf_test::fopen(FILE_PATH, "r");
69 ASSERT_FALSE(file == nullptr);
70
71 char data[50];
72 read = LIBC_NAMESPACE::fscanf(file, "%[A-Za-z .\n]", data);
73 ASSERT_EQ(read, 1);
74 ASSERT_STREQ(simple, data);
75
76 read = LIBC_NAMESPACE::fscanf(file, "%s", data);
77 ASSERT_EQ(read, 1);
78 ASSERT_EQ(LIBC_NAMESPACE::cpp::string_view(numbers, 10),
79 LIBC_NAMESPACE::cpp::string_view(data));
80
81 // The format string starts with a space to handle the fact that the %s leaves
82 // a trailing \n and %c doesn't strip leading whitespace.
83 read = LIBC_NAMESPACE::fscanf(file, " %50c", data);
84 ASSERT_EQ(read, 1);
85 ASSERT_EQ(
86 LIBC_NAMESPACE::cpp::string_view(numbers_and_more),
87 LIBC_NAMESPACE::cpp::string_view(data, sizeof(numbers_and_more) - 1));
88
89 ASSERT_EQ(scanf_test::ferror(file), 0);
90 ASSERT_EQ(scanf_test::fclose(file), 0);
91 }
92