1 //===----------------------------------------------------------------------===//
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 // test <cstdio>
10 
11 #include <cstdio>
12 #include <type_traits>
13 
14 #include "test_macros.h"
15 
16 #ifndef BUFSIZ
17 #error BUFSIZ not defined
18 #endif
19 
20 #ifndef EOF
21 #error EOF not defined
22 #endif
23 
24 #ifndef FILENAME_MAX
25 #error FILENAME_MAX not defined
26 #endif
27 
28 #ifndef FOPEN_MAX
29 #error FOPEN_MAX not defined
30 #endif
31 
32 #ifndef L_tmpnam
33 #error L_tmpnam not defined
34 #endif
35 
36 #ifndef NULL
37 #error NULL not defined
38 #endif
39 
40 #ifndef SEEK_CUR
41 #error SEEK_CUR not defined
42 #endif
43 
44 #ifndef SEEK_END
45 #error SEEK_END not defined
46 #endif
47 
48 #ifndef SEEK_SET
49 #error SEEK_SET not defined
50 #endif
51 
52 #ifndef TMP_MAX
53 #error TMP_MAX not defined
54 #endif
55 
56 #ifndef _IOFBF
57 #error _IOFBF not defined
58 #endif
59 
60 #ifndef _IOLBF
61 #error _IOLBF not defined
62 #endif
63 
64 #ifndef _IONBF
65 #error _IONBF not defined
66 #endif
67 
68 #ifndef stderr
69 #error stderr not defined
70 #endif
71 
72 #ifndef stdin
73 #error stdin not defined
74 #endif
75 
76 #ifndef stdout
77 #error stdout not defined
78 #endif
79 
80 #include <cstdarg>
81 
82 TEST_CLANG_DIAGNOSTIC_IGNORED("-Wformat-zero-length")
83 
84 int main(int, char**)
85 {
86     std::FILE* fp = 0;
87     std::fpos_t fpos = std::fpos_t();
88     std::size_t s = 0;
89     char* cp = 0;
90     std::va_list va;
91     void const* vp = 0;
92     ((void)fp); // Prevent unused warning
93     ((void)fpos); // Prevent unused warning
94     ((void)s); // Prevent unused warning
95     ((void)cp); // Prevent unused warning
96     ((void)va); // Prevent unused warning
97     ((void)vp); // Prevent unused warning
98     static_assert((std::is_same<decltype(std::fclose(fp)), int>::value), "");
99     static_assert((std::is_same<decltype(std::fflush(fp)), int>::value), "");
100     static_assert((std::is_same<decltype(std::setbuf(fp,cp)), void>::value), "");
101     static_assert((std::is_same<decltype(std::vfprintf(fp," ",va)), int>::value), "");
102     static_assert((std::is_same<decltype(std::fprintf(fp," ")), int>::value), "");
103     static_assert((std::is_same<decltype(std::fscanf(fp," ")), int>::value), "");
104     static_assert((std::is_same<decltype(std::snprintf(cp,0," ")), int>::value), "");
105     static_assert((std::is_same<decltype(std::sprintf(cp," ")), int>::value), "");
106     static_assert((std::is_same<decltype(std::sscanf(""," ")), int>::value), "");
107     static_assert((std::is_same<decltype(std::vfprintf(fp," ",va)), int>::value), "");
108     static_assert((std::is_same<decltype(std::vfscanf(fp," ",va)), int>::value), "");
109     static_assert((std::is_same<decltype(std::vsnprintf(cp,0," ",va)), int>::value), "");
110     static_assert((std::is_same<decltype(std::vsprintf(cp," ",va)), int>::value), "");
111     static_assert((std::is_same<decltype(std::vsscanf(""," ",va)), int>::value), "");
112     static_assert((std::is_same<decltype(std::fgetc(fp)), int>::value), "");
113     static_assert((std::is_same<decltype(std::fgets(cp,0,fp)), char*>::value), "");
114     static_assert((std::is_same<decltype(std::fputc(0,fp)), int>::value), "");
115     static_assert((std::is_same<decltype(std::fputs("",fp)), int>::value), "");
116     static_assert((std::is_same<decltype(std::getc(fp)), int>::value), "");
117     static_assert((std::is_same<decltype(std::putc(0,fp)), int>::value), "");
118     static_assert((std::is_same<decltype(std::ungetc(0,fp)), int>::value), "");
119     static_assert((std::is_same<decltype(std::fread((void*)0,0,0,fp)), std::size_t>::value), "");
120     static_assert((std::is_same<decltype(std::fwrite(vp,0,0,fp)), std::size_t>::value), "");
121 #ifndef TEST_HAS_NO_FGETPOS_FSETPOS
122     static_assert((std::is_same<decltype(std::fgetpos(fp, &fpos)), int>::value), "");
123 #endif
124     static_assert((std::is_same<decltype(std::fseek(fp, 0,0)), int>::value), "");
125 #ifndef TEST_HAS_NO_FGETPOS_FSETPOS
126     static_assert((std::is_same<decltype(std::fsetpos(fp, &fpos)), int>::value), "");
127 #endif
128     static_assert((std::is_same<decltype(std::ftell(fp)), long>::value), "");
129     static_assert((std::is_same<decltype(std::rewind(fp)), void>::value), "");
130     static_assert((std::is_same<decltype(std::clearerr(fp)), void>::value), "");
131     static_assert((std::is_same<decltype(std::feof(fp)), int>::value), "");
132     static_assert((std::is_same<decltype(std::ferror(fp)), int>::value), "");
133     static_assert((std::is_same<decltype(std::perror("")), void>::value), "");
134 
135     static_assert((std::is_same<decltype(std::fopen("", "")), std::FILE*>::value), "");
136     static_assert((std::is_same<decltype(std::freopen("", "", fp)), std::FILE*>::value), "");
137     static_assert((std::is_same<decltype(std::remove("")), int>::value), "");
138     static_assert((std::is_same<decltype(std::rename("","")), int>::value), "");
139     static_assert((std::is_same<decltype(std::tmpfile()), std::FILE*>::value), "");
140 
141     // disable deprecated warnings from the C library
142     TEST_DIAGNOSTIC_PUSH
143     TEST_CLANG_DIAGNOSTIC_IGNORED("-Wdeprecated-declarations")
144     static_assert((std::is_same<decltype(std::tmpnam(cp)), char*>::value), "");
145     TEST_DIAGNOSTIC_POP
146 
147     static_assert((std::is_same<decltype(std::getchar()), int>::value), "");
148 #if TEST_STD_VER <= 11
149     TEST_DIAGNOSTIC_PUSH
150     // disable the warning from the C library
151     TEST_CLANG_DIAGNOSTIC_IGNORED("-Wdeprecated-declarations")
152     TEST_GCC_DIAGNOSTIC_IGNORED("-Wdeprecated-declarations")
153     static_assert((std::is_same<decltype(std::gets(cp)), char*>::value), "");
154     TEST_DIAGNOSTIC_POP
155 #endif
156     static_assert((std::is_same<decltype(std::scanf(" ")), int>::value), "");
157     static_assert((std::is_same<decltype(std::vscanf(" ",va)), int>::value), "");
158 
159     static_assert((std::is_same<decltype(std::printf(" ")), int>::value), "");
160     static_assert((std::is_same<decltype(std::putchar(0)), int>::value), "");
161     static_assert((std::is_same<decltype(std::puts("")), int>::value), "");
162     static_assert((std::is_same<decltype(std::vprintf(" ",va)), int>::value), "");
163 
164   return 0;
165 }
166