libstdc++: cstdio Source File

libstdc++

cstdio
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1// -*- C++ -*- forwarding header.
2
3// Copyright (C) 1997-2026 Free Software Foundation, Inc.
4//
5// This file is part of the GNU ISO C++ Library. This library is free
6// software; you can redistribute it and/or modify it under the
7// terms of the GNU General Public License as published by the
8// Free Software Foundation; either version 3, or (at your option)
9// any later version.
10
11// This library is distributed in the hope that it will be useful,
12// but WITHOUT ANY WARRANTY; without even the implied warranty of
13// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14// GNU General Public License for more details.
15
16// Under Section 7 of GPL version 3, you are granted additional
17// permissions described in the GCC Runtime Library Exception, version
18// 3.1, as published by the Free Software Foundation.
19
20// You should have received a copy of the GNU General Public License and
21// a copy of the GCC Runtime Library Exception along with this program;
22// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
23// <http://www.gnu.org/licenses/>.
24
25/** @file include/cstdio
26 * This is a Standard C++ Library file. You should @c \#include this file
27 * in your programs, rather than any of the @a *.h implementation files.
28 *
29 * This is the C++ version of the Standard C Library header @c stdio.h,
30 * and its contents are (mostly) the same as that header, but are all
31 * contained in the namespace @c std (except for names which are defined
32 * as macros in C).
33 */
34
35//
36// ISO C++ 14882: 27.8.2 C Library files
37//
38
39#ifndef _GLIBCXX_CSTDIO
40#define _GLIBCXX_CSTDIO 1
41
42#ifdef _GLIBCXX_SYSHDR
43#pragma GCC system_header
44#endif
45
46#include <bits/c++config.h>
47#include <stdio.h>
48
49#if __cplusplus <= 201103L && !defined(_GLIBCXX_HAVE_GETS)
50extern "C" char* gets (char* __s) __attribute__((__deprecated__));
51#endif
52
53// Get rid of those macros defined in <stdio.h> in lieu of real functions.
54#undef clearerr
55#undef fclose
56#undef feof
57#undef ferror
58#undef fflush
59#undef fgetc
60#undef fgetpos
61#undef fgets
62#undef fopen
63#undef fprintf
64#undef fputc
65#undef fputs
66#undef fread
67#undef freopen
68#undef fscanf
69#undef fseek
70#undef fsetpos
71#undef ftell
72#undef fwrite
73#undef getc
74#undef getchar
75#if __cplusplus <= 201103L
76# undef gets
77#endif
78#undef perror
79#undef printf
80#undef putc
81#undef putchar
82#undef puts
83#undef remove
84#undef rename
85#undef rewind
86#undef scanf
87#undef setbuf
88#undef setvbuf
89#undef sprintf
90#undef sscanf
91#undef tmpfile
92#undef tmpnam
93#undef ungetc
94#undef vfprintf
95#undef vprintf
96#undef vsprintf
97
98namespace std
99{
100 using ::FILE;
101 using ::fpos_t;
102
103 using ::clearerr;
104 using ::fclose;
105 using ::feof;
106 using ::ferror;
107 using ::fflush;
108 using ::fgetc;
109 using ::fgetpos;
110 using ::fgets;
111 using ::fopen;
112 using ::fprintf;
113 using ::fputc;
114 using ::fputs;
115 using ::fread;
116 using ::freopen;
117 using ::fscanf;
118 using ::fseek;
119 using ::fsetpos;
120 using ::ftell;
121 using ::fwrite;
122 using ::getc;
123 using ::getchar;
124#if __cplusplus <= 201103L
125 // LWG 2249
126 using ::gets;
127#endif
128 using ::perror;
129 using ::printf;
130 using ::putc;
131 using ::putchar;
132 using ::puts;
133 using ::remove;
134 using ::rename;
135 using ::rewind;
136 using ::scanf;
137 using ::setbuf;
138 using ::setvbuf;
139 using ::sprintf;
140 using ::sscanf;
141 using ::tmpfile;
142#if _GLIBCXX_USE_TMPNAM
143 using ::tmpnam;
144#endif
145 using ::ungetc;
146 using ::vfprintf;
147 using ::vprintf;
148 using ::vsprintf;
149} // namespace
150
151#if _GLIBCXX_USE_C99_STDIO
152
153#undef snprintf
154#undef vfscanf
155#undef vscanf
156#undef vsnprintf
157#undef vsscanf
158
159namespace __gnu_cxx
160{
161#if _GLIBCXX_USE_C99_CHECK || _GLIBCXX_USE_C99_DYNAMIC
162 extern "C" int
163 (snprintf)(char * __restrict, std::size_t, const char * __restrict, ...)
164 throw ();
165 extern "C" int
166 (vfscanf)(FILE * __restrict, const char * __restrict, __gnuc_va_list);
167 extern "C" int (vscanf)(const char * __restrict, __gnuc_va_list);
168 extern "C" int
169 (vsnprintf)(char * __restrict, std::size_t, const char * __restrict,
170 __gnuc_va_list) throw ();
171 extern "C" int
172 (vsscanf)(const char * __restrict, const char * __restrict, __gnuc_va_list)
173 throw ();
174#endif
175
176#if !_GLIBCXX_USE_C99_DYNAMIC
177 using ::snprintf;
178 using ::vfscanf;
179 using ::vscanf;
180 using ::vsnprintf;
181 using ::vsscanf;
182#endif
183} // namespace __gnu_cxx
184
185namespace std
186{
187 using ::__gnu_cxx::snprintf;
188 using ::__gnu_cxx::vfscanf;
189 using ::__gnu_cxx::vscanf;
190 using ::__gnu_cxx::vsnprintf;
191 using ::__gnu_cxx::vsscanf;
192} // namespace std
193
194#endif // _GLIBCXX_USE_C99_STDIO
195
196#endif
c++config.h
std
ISO C++ entities toplevel namespace is std.
__gnu_cxx
GNU extensions for public use.