compat/stdio.h

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