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 <Availability.h>
  32 #include <sys/cdefs.h>
  33 #include <secure/_common.h>
  34
  35 #if _USE_FORTIFY_LEVEL > 0
  36
  37 #ifndef __has_builtin
  38 #define _undef__has_builtin
  39 #define __has_builtin(x) 0
  40 #endif
  41
  42 /* <rdar://problem/12622659> */
  43 #if defined(__clang__) && \
  44     ((defined(__apple_build_version__) && __apple_build_version__ >= 4260006) || \
  45      (!defined(__apple_build_version__) && (__clang_major__ > 3 || (__clang_major__ == 3 && __clang_minor__ >= 3))))
  46 #define __HAS_FIXED_CHK_PROTOTYPES 1
  47 #else
  48 #define __HAS_FIXED_CHK_PROTOTYPES 0
  49 #endif
  50
  51 /* memccpy, memcpy, mempcpy, memmove, memset, strcpy, strlcpy, stpcpy,
  52    strncpy, stpncpy, strcat, strlcat, and strncat */
  53
  54 #if __IPHONE_OS_VERSION_MIN_REQUIRED >= 70000 || __MAC_OS_X_VERSION_MIN_REQUIRED >= 1090
  55 #if __has_builtin(__builtin___memccpy_chk) && __HAS_FIXED_CHK_PROTOTYPES
  56 #undef memccpy
  57 #define memccpy(dest, src, c, len)                                  \
  58   __builtin___memccpy_chk (dest, src, c, len, __darwin_obsz0 (dest))
  59 #endif
  60 #endif
  61
  62 #if __has_builtin(__builtin___memcpy_chk) || defined(__GNUC__)
  63 #undef memcpy
  64 #define memcpy(dest, src, len)                                  \
  65   __builtin___memcpy_chk (dest, src, len, __darwin_obsz0 (dest))
  66 #endif
  67
  68 #if __has_builtin(__builtin___memmove_chk) || defined(__GNUC__)
  69 #undef memmove
  70 #define memmove(dest, src, len)                                 \
  71   __builtin___memmove_chk (dest, src, len, __darwin_obsz0 (dest))
  72 #endif
  73
  74 #if __has_builtin(__builtin___memset_chk) || defined(__GNUC__)
  75 #undef memset
  76 #define memset(dest, val, len)                                  \
  77   __builtin___memset_chk (dest, val, len, __darwin_obsz0 (dest))
  78 #endif
  79
  80 #if __has_builtin(__builtin___strcpy_chk) || defined(__GNUC__)
  81 #undef strcpy
  82 #define strcpy(dest, src)                                       \
  83   __builtin___strcpy_chk (dest, src, __darwin_obsz (dest))
  84 #endif
  85
  86 #if __DARWIN_C_LEVEL >= 200809L
  87 #if __has_builtin(__builtin___stpcpy_chk) || defined(__GNUC__)
  88 #undef stpcpy
  89 #define stpcpy(dest, src)                                       \
  90   __builtin___stpcpy_chk (dest, src, __darwin_obsz (dest))
  91 #endif
  92
  93 #if __has_builtin(__builtin___stpncpy_chk) || __APPLE_CC__ >= 5666 || __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 7)
  94 #undef stpncpy
  95 #define stpncpy(dest, src, len)                                 \
  96   __builtin___stpncpy_chk (dest, src, len, __darwin_obsz (dest))
  97 #endif
  98 #endif /* _DARWIN_C_LEVEL >= 200809L */
  99
 100 #if __DARWIN_C_LEVEL >= __DARWIN_C_FULL
 101 #if __IPHONE_OS_VERSION_MIN_REQUIRED >= 70000 || __MAC_OS_X_VERSION_MIN_REQUIRED >= 1090
 102 #if __has_builtin(__builtin___strlcpy_chk) && __HAS_FIXED_CHK_PROTOTYPES
 103 #undef strlcpy
 104 #define strlcpy(dest, src, len)                                 \
 105   __builtin___strlcpy_chk (dest, src, len, __darwin_obsz (dest))
 106 #endif
 107
 108 #if __has_builtin(__builtin___strlcat_chk) && __HAS_FIXED_CHK_PROTOTYPES
 109 #undef strlcat
 110 #define strlcat(dest, src, len)                                 \
 111   __builtin___strlcat_chk (dest, src, len, __darwin_obsz (dest))
 112 #endif
 113 #endif /* __IPHONE_OS_VERSION_MIN_REQUIRED >= 70000 || __MAC_OS_X_VERSION_MIN_REQUIRED >= 1090 */
 114 #endif /* __DARWIN_C_LEVEL >= __DARWIN_C_FULL */
 115
 116 #if __has_builtin(__builtin___strncpy_chk) || defined(__GNUC__)
 117 #undef strncpy
 118 #define strncpy(dest, src, len)                                 \
 119   __builtin___strncpy_chk (dest, src, len, __darwin_obsz (dest))
 120 #endif
 121
 122 #if __has_builtin(__builtin___strcat_chk) || defined(__GNUC__)
 123 #undef strcat
 124 #define strcat(dest, src)                                       \
 125   __builtin___strcat_chk (dest, src, __darwin_obsz (dest))
 126 #endif
 127
 128 #if ! (defined(__IPHONE_OS_VERSION_MIN_REQUIRED) && __IPHONE_OS_VERSION_MIN_REQUIRED < 32000)
 129 #if __has_builtin(__builtin___strncat_chk) || defined(__GNUC__)
 130 #undef strncat
 131 #define strncat(dest, src, len)                                 \
 132   __builtin___strncat_chk (dest, src, len, __darwin_obsz (dest))
 133 #endif
 134 #endif
 135
 136 #ifdef _undef__has_builtin
 137 #undef _undef__has_builtin
 138 #undef __has_builtin
 139 #endif
 140
 141 #undef __HAS_FIXED_CHK_PROTOTYPES
 142
 143 #endif /* _USE_FORTIFY_LEVEL > 0 */
 144 #endif /* _SECURE__STRING_H_ */