1 /*
2 * Copyright (C) 1996-2021 The Squid Software Foundation and contributors
3 *
4 * Squid software is distributed under GPLv2+ license and includes
5 * contributions from numerous individuals and organizations.
6 * Please see the COPYING and CONTRIBUTORS files for details.
7 */
8
9 #ifndef _SQUID_COMPAT_STDIO_H
10 #define _SQUID_COMPAT_STDIO_H
11
12 /** 64-bit broken <cstdio>
13 *
14 * <stdio.h> provides fgetpos64, fopen64 if __USE_FILE_OFFSET64 is defined.
15 * It then checks whether a gcc-specific __REDIRECT macro is available
16 * (defined in <sys/cdefs.h>, depending on __GNUC__ begin available).
17 * If it is not available, it does a preprocessor #define.
18 * Which <cstdio> undefines, with this comment:
19 * "// Get rid of those macros defined in <stdio.h> in lieu of real functions.".
20 * When it does a namespace redirection ("namespace std { using ::fgetpos; }") it goes blam, as
21 * fgetpos64 is available, while fgetpos is not.
22 */
23
24 // Import the stdio.h definitions first to do the state setup
25 #if HAVE_STDIO_H
26 #include <stdio.h>
27 #endif
28
29 // Check for the buggy case
30 #if defined(__USE_FILE_OFFSET64) && !defined(__REDIRECT)
31
32 // Define the problem functions as needed
33 #if defined(fgetpos)
34 #undef fgetpos
fgetpos(FILE * f,fpos64_t * p)35 inline int fgetpos(FILE *f, fpos64_t *p) { return fgetpos64(f,p); }
36 #endif
37 #if defined(fopen)
38 #undef fopen
fopen(const char * f,const char * m)39 inline FILE * fopen(const char *f, const char *m) { return fopen64(f,m); }
40 #endif
41 #if defined(freopen)
42 #undef freopen
freopen(const char * f,const char * m,FILE * s)43 inline FILE * freopen(const char *f, const char *m, FILE *s) { return freopen64(f,m,s); }
44 #endif
45 #if defined(fsetpos)
46 #undef fsetpos
fsetpos(FILE * f,fpos64_t * p)47 inline int fsetpos(FILE *f, fpos64_t *p) { return fsetpos64(f,p); }
48 #endif
49 #if defined(tmpfile)
50 #undef tmpfile
tmpfile(void)51 inline FILE * tmpfile(void) { return tmpfile64(); }
52 #endif
53
54 #endif /* __USE_FILE_OFFSET64 && !__REDIRECT */
55
56 // Finally import the <cstdio> stuff we actually use
57 #if defined(__cplusplus)
58 #include <cstdio>
59 #endif
60
61 #ifndef MAXPATHLEN
62 #define MAXPATHLEN SQUID_MAXPATHLEN
63 #endif
64
65 #endif /* _SQUID_COMPAT_STDIO_H */
66
67