string/bits/string3.h

   1 /* Copyright (C) 2004, 2005 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, write to the Free
  16    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  17    02111-1307 USA.  */
  18
  19 #ifndef _STRING_H
  20 # error "Never use <bits/string3.h> directly; include <string.h> instead."
  21 #endif
  22
  23 /* XXX This is temporarily.  We should not redefine any of the symbols
  24    and instead integrate the error checking into the original
  25    definitions.  */
  26 #undef memcpy
  27 #undef memmove
  28 #undef memset
  29 #undef strcat
  30 #undef strcpy
  31 #undef strncat
  32 #undef strncpy
  33 #ifdef __USE_GNU
  34 # undef mempcpy
  35 # undef stpcpy
  36 #endif
  37 #ifdef __USE_BSD
  38 # undef bcopy
  39 # undef bzero
  40 #endif
  41
  42
  43 #define memcpy(dest, src, len) \
  44   ((__bos0 (dest) != (size_t) -1)                                       \
  45    ? __builtin___memcpy_chk (dest, src, len, __bos0 (dest))             \
  46    : __memcpy_ichk (dest, src, len))
  47 static __inline__ void *
  48 __attribute__ ((__always_inline__))
  49 __memcpy_ichk (void *__restrict __dest, const void *__restrict __src,
  50                size_t __len)
  51 {
  52   return __builtin___memcpy_chk (__dest, __src, __len, __bos0 (__dest));
  53 }
  54
  55
  56 #define memmove(dest, src, len) \
  57   ((__bos0 (dest) != (size_t) -1)                                       \
  58    ? __builtin___memmove_chk (dest, src, len, __bos0 (dest))            \
  59    : __memmove_ichk (dest, src, len))
  60 static __inline__ void *
  61 __attribute__ ((__always_inline__))
  62 __memmove_ichk (void *__dest, const void *__src, size_t __len)
  63 {
  64   return __builtin___memmove_chk (__dest, __src, __len, __bos0 (__dest));
  65 }
  66
  67
  68 #ifdef __USE_GNU
  69 # define mempcpy(dest, src, len) \
  70   ((__bos0 (dest) != (size_t) -1)                                       \
  71    ? __builtin___mempcpy_chk (dest, src, len, __bos0 (dest))            \
  72    : __mempcpy_ichk (dest, src, len))
  73 static __inline__ void *
  74 __attribute__ ((__always_inline__))
  75 __mempcpy_ichk (void *__restrict __dest, const void *__restrict __src,
  76                 size_t __len)
  77 {
  78   return __builtin___mempcpy_chk (__dest, __src, __len, __bos0 (__dest));
  79 }
  80 #endif
  81
  82
  83 /* The first two tests here help to catch a somewhat common problem
  84    where the second and third parameter are transposed.  This is
  85    especially problematic if the intended fill value is zero.  In this
  86    case no work is done at all.  We detect these problems by referring
  87    non-existing functions.  */
  88 extern char *__memset_zero_constant_len_parameter (void *, int, size_t,
  89                                                    size_t);
  90 #define memset(dest, ch, len) \
  91   (__builtin_constant_p (len) && (len) == 0                                   \
  92    ? __memset_zero_constant_len_parameter (dest, ch, len, 0)                  \
  93    : ((__bos0 (dest) != (size_t) -1)                                          \
  94       ? __builtin___memset_chk (dest, ch, len, __bos0 (dest))                 \
  95       : __memset_ichk (dest, ch, len)))
  96 static __inline__ void *
  97 __attribute__ ((__always_inline__))
  98 __memset_ichk (void *__dest, int __ch, size_t __len)
  99 {
 100   return __builtin___memset_chk (__dest, __ch, __len, __bos0 (__dest));
 101 }
 102
 103 #ifdef __USE_BSD
 104 # define bcopy(src, dest, len) ((void) \
 105   ((__bos0 (dest) != (size_t) -1)                                       \
 106    ? __builtin___memmove_chk (dest, src, len, __bos0 (dest))            \
 107    : __memmove_ichk (dest, src, len)))
 108 # define bzero(dest, len) ((void) \
 109   ((__bos0 (dest) != (size_t) -1)                                       \
 110    ? __builtin___memset_chk (dest, '\0', len, __bos0 (dest))            \
 111    : __memset_ichk (dest, '\0', len)))
 112 #endif
 113
 114
 115 #define strcpy(dest, src) \
 116   ((__bos (dest) != (size_t) -1)                                        \
 117    ? __builtin___strcpy_chk (dest, src, __bos (dest))                   \
 118    : __strcpy_ichk (dest, src))
 119 static __inline__ char *
 120 __attribute__ ((__always_inline__))
 121 __strcpy_ichk (char *__restrict __dest, const char *__restrict __src)
 122 {
 123   return __builtin___strcpy_chk (__dest, __src, __bos (__dest));
 124 }
 125
 126
 127 #ifdef __USE_GNU
 128 # define stpcpy(dest, src) \
 129   ((__bos (dest) != (size_t) -1)                                        \
 130    ? __builtin___stpcpy_chk (dest, src, __bos (dest))                   \
 131    : __stpcpy_ichk (dest, src))
 132 static __inline__ char *
 133 __attribute__ ((__always_inline__))
 134 __stpcpy_ichk (char *__restrict __dest, const char *__restrict __src)
 135 {
 136   return __builtin___stpcpy_chk (__dest, __src, __bos (__dest));
 137 }
 138 #endif
 139
 140
 141 #define strncpy(dest, src, len) \
 142   ((__bos (dest) != (size_t) -1)                                        \
 143    ? __builtin___strncpy_chk (dest, src, len, __bos (dest))             \
 144    : __strncpy_ichk (dest, src, len))
 145 static __inline__ char *
 146 __attribute__ ((__always_inline__))
 147 __strncpy_ichk (char *__restrict __dest, const char *__restrict __src,
 148                 size_t __len)
 149 {
 150   return __builtin___strncpy_chk (__dest, __src, __len, __bos (__dest));
 151 }
 152
 153
 154 #define strcat(dest, src) \
 155   ((__bos (dest) != (size_t) -1)                                        \
 156    ? __builtin___strcat_chk (dest, src, __bos (dest))                   \
 157    : __strcat_ichk (dest, src))
 158 static __inline__ char *
 159 __attribute__ ((__always_inline__))
 160 __strcat_ichk (char *__restrict __dest, const char *__restrict __src)
 161 {
 162   return __builtin___strcat_chk (__dest, __src, __bos (__dest));
 163 }
 164
 165
 166 #define strncat(dest, src, len) \
 167   ((__bos (dest) != (size_t) -1)                                        \
 168    ? __builtin___strncat_chk (dest, src, len, __bos (dest))             \
 169    : __strncat_ichk (dest, src, len))
 170 static __inline__ char *
 171 __attribute__ ((__always_inline__))
 172 __strncat_ichk (char *__restrict __dest, const char *__restrict __src,
 173                 size_t __len)
 174 {
 175   return __builtin___strncat_chk (__dest, __src, __len, __bos (__dest));
 176 }