include/secure/_string.h

   1 /*
   2  * Copyright (c) 2007 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23
  24 #ifndef _STRING_H_
  25 # error "Never use <secure/_string.h> directly; include <string.h> instead."
  26 #endif
  27
  28 #ifndef _SECURE__STRING_H_
  29 #define _SECURE__STRING_H_
  30
  31 #include <sys/cdefs.h>
  32 #include <secure/_common.h>
  33
  34 #if _USE_FORTIFY_LEVEL > 0
  35
  36 /* memcpy, mempcpy, memmove, memset, strcpy, stpcpy, strncpy, stpncpy,
  37    strcat, and strncat */
  38
  39 #undef memcpy
  40 #undef memmove
  41 #undef memset
  42 #undef strcpy
  43 #if __DARWIN_C_LEVEL >= 200809L
  44 #undef stpcpy
  45 #undef stpncpy
  46 #endif
  47 #undef strncpy
  48 #undef strcat
  49 #if ! (defined(__IPHONE_OS_VERSION_MIN_REQUIRED) && __IPHONE_OS_VERSION_MIN_REQUIRED < 32000)
  50 #undef strncat
  51 #endif
  52
  53 #define memcpy(dest, src, len)                                  \
  54   ((__darwin_obsz0 (dest) != (size_t) -1)                               \
  55    ? __builtin___memcpy_chk (dest, src, len, __darwin_obsz0 (dest))     \
  56    : __inline_memcpy_chk (dest, src, len))
  57
  58 static __inline void *
  59 __inline_memcpy_chk (void *__dest, const void *__src, size_t __len)
  60 {
  61   return __builtin___memcpy_chk (__dest, __src, __len, __darwin_obsz0(__dest));
  62 }
  63
  64 #define memmove(dest, src, len)                                 \
  65   ((__darwin_obsz0 (dest) != (size_t) -1)                               \
  66    ? __builtin___memmove_chk (dest, src, len, __darwin_obsz0 (dest))    \
  67    : __inline_memmove_chk (dest, src, len))
  68
  69 static __inline void *
  70 __inline_memmove_chk (void *__dest, const void *__src, size_t __len)
  71 {
  72   return __builtin___memmove_chk (__dest, __src, __len, __darwin_obsz0(__dest));
  73 }
  74
  75 #define memset(dest, val, len)                                  \
  76   ((__darwin_obsz0 (dest) != (size_t) -1)                               \
  77    ? __builtin___memset_chk (dest, val, len, __darwin_obsz0 (dest))     \
  78    : __inline_memset_chk (dest, val, len))
  79
  80 static __inline void *
  81 __inline_memset_chk (void *__dest, int __val, size_t __len)
  82 {
  83   return __builtin___memset_chk (__dest, __val, __len, __darwin_obsz0(__dest));
  84 }
  85
  86 #define strcpy(dest, src)                                       \
  87   ((__darwin_obsz0 (dest) != (size_t) -1)                               \
  88    ? __builtin___strcpy_chk (dest, src, __darwin_obsz (dest))           \
  89    : __inline_strcpy_chk (dest, src))
  90
  91 static __inline char *
  92 __inline_strcpy_chk (char *__restrict __dest, const char *__restrict __src)
  93 {
  94   return __builtin___strcpy_chk (__dest, __src, __darwin_obsz(__dest));
  95 }
  96
  97 #if __DARWIN_C_LEVEL >= 200809L
  98 #define stpcpy(dest, src)                                       \
  99   ((__darwin_obsz0 (dest) != (size_t) -1)                               \
 100    ? __builtin___stpcpy_chk (dest, src, __darwin_obsz (dest))           \
 101    : __inline_stpcpy_chk (dest, src))
 102
 103 static __inline char *
 104 __inline_stpcpy_chk (char *__dest, const char *__src)
 105 {
 106   return __builtin___stpcpy_chk (__dest, __src, __darwin_obsz(__dest));
 107 }
 108
 109 #define stpncpy(dest, src, len)                                 \
 110   ((__darwin_obsz0 (dest) != (size_t) -1)                               \
 111    ? __builtin___stpncpy_chk (dest, src, len, __darwin_obsz (dest))     \
 112    : __inline_stpncpy_chk (dest, src, len))
 113
 114 static __inline char *
 115 __inline_stpncpy_chk (char *__restrict __dest, const char *__restrict __src,
 116                       size_t __len)
 117 {
 118   return __builtin___stpncpy_chk (__dest, __src, __len, __darwin_obsz(__dest));
 119 }
 120 #endif
 121
 122 #define strncpy(dest, src, len)                                 \
 123   ((__darwin_obsz0 (dest) != (size_t) -1)                               \
 124    ? __builtin___strncpy_chk (dest, src, len, __darwin_obsz (dest))     \
 125    : __inline_strncpy_chk (dest, src, len))
 126
 127 static __inline char *
 128 __inline_strncpy_chk (char *__restrict __dest, const char *__restrict __src,
 129                       size_t __len)
 130 {
 131   return __builtin___strncpy_chk (__dest, __src, __len, __darwin_obsz(__dest));
 132 }
 133
 134 #define strcat(dest, src)                                       \
 135   ((__darwin_obsz0 (dest) != (size_t) -1)                               \
 136    ? __builtin___strcat_chk (dest, src, __darwin_obsz (dest))           \
 137    : __inline_strcat_chk (dest, src))
 138
 139 static __inline char *
 140 __inline_strcat_chk (char *__restrict __dest, const char *__restrict __src)
 141 {
 142   return __builtin___strcat_chk (__dest, __src, __darwin_obsz(__dest));
 143 }
 144
 145 #if ! (defined(__IPHONE_OS_VERSION_MIN_REQUIRED) && __IPHONE_OS_VERSION_MIN_REQUIRED < 32000)
 146 #define strncat(dest, src, len)                                 \
 147   ((__darwin_obsz0 (dest) != (size_t) -1)                               \
 148    ? __builtin___strncat_chk (dest, src, len, __darwin_obsz (dest))     \
 149    : __inline_strncat_chk (dest, src, len))
 150
 151 static __inline char *
 152 __inline_strncat_chk (char *__restrict __dest, const char *__restrict __src,
 153                       size_t __len)
 154 {
 155   return __builtin___strncat_chk (__dest, __src, __len, __darwin_obsz(__dest));
 156 }
 157 #endif
 158
 159 #endif
 160 #endif