libio/bits/stdio2.h

   1 /* Checking macros for stdio functions.
   2    Copyright (C) 2004, 2005 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19
  20 #ifndef _STDIO_H
  21 # error "Never include <bits/stdio2.h> directly; use <stdio.h> instead."
  22 #endif
  23
  24 extern int __sprintf_chk (char *__restrict __s, int __flag, size_t __slen,
  25                           __const char *__restrict __format, ...) __THROW;
  26 extern int __vsprintf_chk (char *__restrict __s, int __flag, size_t __slen,
  27                            __const char *__restrict __format,
  28                            _G_va_list __ap) __THROW;
  29
  30 #define sprintf(str, ...) \
  31   __builtin___sprintf_chk (str, __USE_FORTIFY_LEVEL - 1, __bos (str), \
  32                            __VA_ARGS__)
  33 #define vsprintf(str, fmt, ap) \
  34   __builtin___vsprintf_chk (str, __USE_FORTIFY_LEVEL - 1, __bos (str), fmt, ap)
  35
  36 #if defined __USE_BSD || defined __USE_ISOC99 || defined __USE_UNIX98
  37
  38 extern int __snprintf_chk (char *__restrict __s, size_t __n, int __flag,
  39                            size_t __slen, __const char *__restrict __format,
  40                            ...) __THROW;
  41 extern int __vsnprintf_chk (char *__restrict __s, size_t __n, int __flag,
  42                             size_t __slen, __const char *__restrict __format,
  43                             _G_va_list __ap) __THROW;
  44
  45 # define snprintf(str, len, ...) \
  46   __builtin___snprintf_chk (str, len, __USE_FORTIFY_LEVEL - 1, __bos (str), \
  47                             __VA_ARGS__)
  48 # define vsnprintf(str, len, fmt, ap) \
  49   __builtin___vsnprintf_chk (str, len, __USE_FORTIFY_LEVEL - 1, __bos (str), \
  50                              fmt, ap)
  51
  52 #endif
  53
  54 #if __USE_FORTIFY_LEVEL > 1
  55
  56 extern int __fprintf_chk (FILE *__restrict __stream, int __flag,
  57                           __const char *__restrict __format, ...);
  58 extern int __printf_chk (int __flag, __const char *__restrict __format, ...);
  59 extern int __vfprintf_chk (FILE *__restrict __stream, int __flag,
  60                            __const char *__restrict __format, _G_va_list __ap);
  61 extern int __vprintf_chk (int __flag, __const char *__restrict __format,
  62                           _G_va_list __ap);
  63
  64 # define printf(...) \
  65   __printf_chk (__USE_FORTIFY_LEVEL - 1, __VA_ARGS__)
  66 # define fprintf(stream, ...) \
  67   __fprintf_chk (stream, __USE_FORTIFY_LEVEL - 1, __VA_ARGS__)
  68 # define vprintf(format, ap) \
  69   __vprintf_chk (__USE_FORTIFY_LEVEL - 1, format, ap)
  70 # define vfprintf(stream, format, ap) \
  71   __vfprintf_chk (stream, __USE_FORTIFY_LEVEL - 1, format, ap)
  72
  73 #endif
  74
  75 extern char *__gets_chk (char *__str, size_t) __wur;
  76 extern char *__REDIRECT (__gets_alias, (char *__str), gets) __wur;
  77
  78 extern __always_inline __wur char *
  79 gets (char *__str)
  80 {
  81   if (__bos (__str) != (size_t) -1)
  82     return __gets_chk (__str, __bos (__str));
  83   return __gets_alias (__str);
  84 }
  85
  86 extern char *__fgets_chk (char *__restrict __s, size_t __size, int __n,
  87                           FILE *__restrict __stream) __wur;
  88 extern char *__REDIRECT (__fgets_alias,
  89                          (char *__restrict __s, int __n,
  90                           FILE *__restrict __stream), fgets) __wur;
  91
  92 extern __always_inline __wur char *
  93 fgets (char *__restrict __s, int __n, FILE *__restrict __stream)
  94 {
  95   if (__bos (__s) != (size_t) -1
  96       && (!__builtin_constant_p (__n) || (size_t) __n > __bos (__s)))
  97     return __fgets_chk (__s, __bos (__s), __n, __stream);
  98   return __fgets_alias (__s, __n, __stream);
  99 }
 100
 101 #ifdef __USE_GNU
 102 extern char *__fgets_unlocked_chk (char *__restrict __s, size_t __size,
 103                                    int __n, FILE *__restrict __stream) __wur;
 104 extern char *__REDIRECT (__fgets_unlocked_alias,
 105                          (char *__restrict __s, int __n,
 106                           FILE *__restrict __stream), fgets_unlocked) __wur;
 107
 108 extern __always_inline __wur char *
 109 fgets_unlocked (char *__restrict __s, int __n, FILE *__restrict __stream)
 110 {
 111   if (__bos (__s) != (size_t) -1
 112       && (!__builtin_constant_p (__n) || (size_t) __n > __bos (__s)))
 113     return __fgets_unlocked_chk (__s, __bos (__s), __n, __stream);
 114   return __fgets_unlocked_alias (__s, __n, __stream);
 115 }
 116 #endif