src/flippers.cpp

   1 /*
   2  * Copyright (c) 2003-2004 Apple Computer, 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
  25 //
  26 // process - track a single client process and its belongings
  27 //
  28 #include "flippers.h"
  29 #include <security_utilities/memutils.h>
  30
  31 using namespace LowLevelMemoryUtilities;
  32
  33
  34 namespace Flippers {
  35
  36
  37 //
  38 // Automatically generated flippers
  39 //
  40 #include "flip_gen.cpp"
  41
  42
  43 //
  44 // The raw byte reversal flipper
  45 //
  46 void flip(void *addr, size_t size)
  47 {
  48         assert(size > 1 && (size % 2 == 0));
  49         Byte *word = reinterpret_cast<uint8 *>(addr);
  50         for (size_t n = 0; n < size/2; n++) {
  51                 Byte b = word[n];
  52                 word[n] = word[size-1-n];
  53                 word[size-1-n] = b;
  54         }
  55 }
  56
  57
  58 //
  59 // Basic flippers
  60 //
  61 void flip(uint32 &obj)          { flip(&obj, sizeof(obj)); }
  62 void flip(uint16 &obj)          { flip(&obj, sizeof(obj)); }
  63 void flip(sint32 &obj)          { flip(&obj, sizeof(obj)); }
  64 void flip(sint16 &obj)          { flip(&obj, sizeof(obj)); }
  65
  66
  67 //
  68 // Flip a context attribute. This is heavily polymorphic.
  69 //
  70 void flip(CSSM_CONTEXT_ATTRIBUTE &obj)
  71 {
  72         flip(obj.AttributeType);
  73         flip(obj.AttributeLength);
  74         switch (obj.AttributeType & CSSM_ATTRIBUTE_TYPE_MASK) {
  75         case CSSM_ATTRIBUTE_DATA_UINT32:
  76                 flip(obj.Attribute.Uint32);
  77                 break;
  78         // all other alternatives are handled by CSSM_CONTEXT_ATTRIBUTE's walker
  79         default:
  80                 break;
  81         }
  82 }
  83
  84
  85 }       // end namespace Flippers