1 // Licensed to the .NET Foundation under one or more agreements.
2 // The .NET Foundation licenses this file to you under the MIT license.
12 #ifndef __PAL_ENDIAN_H__
13 #define __PAL_ENDIAN_H__
17 inline UINT16 SWAP16(UINT16 x)
19 return (UINT16)((x >> 8) | (x << 8));
22 inline UINT32 SWAP32(UINT32 x)
25 ((x >> 8) & 0x0000FF00L) |
26 ((x & 0x0000FF00L) << 8) |
36 inline UINT16 VAL16(UINT16 x)
41 inline UINT32 VAL32(UINT32 x)
46 inline UINT64 VAL64(UINT64 x)
48 return ((UINT64)VAL32(x) << 32) | VAL32(x >> 32);
51 inline void SwapString(WCHAR *szString)
54 for (i = 0; szString[i] != L'\0'; i++)
56 szString[i] = VAL16(szString[i]);
60 inline void SwapStringLength(WCHAR *szString, ULONG StringLength)
63 for (i = 0; i < StringLength; i++)
65 szString[i] = VAL16(szString[i]);
69 inline void SwapGuid(GUID *pGuid)
71 pGuid->Data1 = VAL32(pGuid->Data1);
72 pGuid->Data2 = VAL16(pGuid->Data2);
73 pGuid->Data3 = VAL16(pGuid->Data3);
77 /* C Version of VAL functionality. Swap functions omitted for lack of use in C code */
78 #define VAL16(x) (((x) >> 8) | ((x) << 8))
79 #define VAL32(y) (((y) >> 24) | (((y) >> 8) & 0x0000FF00L) | (((y) & 0x0000FF00L) << 8) | ((y) << 24))
80 #define VAL64(z) (((UINT64)VAL32(z) << 32) | VAL32((z) >> 32))
89 #define SwapStringLength(x, y)
95 #define VALPTR(x) VAL64(x)
97 #define VALPTR(x) VAL32(x)
101 #define LOG2_PTRSIZE 2
102 #define ALIGN_ACCESS ((1<<LOG2_PTRSIZE)-1)
106 #define LOG2_PTRSIZE 3
107 #define ALIGN_ACCESS ((1<<LOG2_PTRSIZE)-1)
110 #if defined(ALIGN_ACCESS) && !defined(_MSC_VER)
113 // Get Unaligned values from a potentially unaligned object
114 inline UINT16 GET_UNALIGNED_16(const void *pObject)
117 memcpy(&temp, pObject, sizeof(temp));
120 inline UINT32 GET_UNALIGNED_32(const void *pObject)
123 memcpy(&temp, pObject, sizeof(temp));
126 inline UINT64 GET_UNALIGNED_64(const void *pObject)
129 memcpy(&temp, pObject, sizeof(temp));
133 // Set Value on an potentially unaligned object
134 inline void SET_UNALIGNED_16(void *pObject, UINT16 Value)
136 memcpy(pObject, &Value, sizeof(UINT16));
138 inline void SET_UNALIGNED_32(void *pObject, UINT32 Value)
140 memcpy(pObject, &Value, sizeof(UINT32));
142 inline void SET_UNALIGNED_64(void *pObject, UINT64 Value)
144 memcpy(pObject, &Value, sizeof(UINT64));
147 #endif // __cplusplus
149 #else // defined(ALIGN_ACCESS) && !defined(_MSC_VER)
151 // Get Unaligned values from a potentially unaligned object
152 #define GET_UNALIGNED_16(_pObject) (*(UINT16 UNALIGNED *)(_pObject))
153 #define GET_UNALIGNED_32(_pObject) (*(UINT32 UNALIGNED *)(_pObject))
154 #define GET_UNALIGNED_64(_pObject) (*(UINT64 UNALIGNED *)(_pObject))
156 // Set Value on an potentially unaligned object
157 #define SET_UNALIGNED_16(_pObject, _Value) (*(UNALIGNED UINT16 *)(_pObject)) = (UINT16)(_Value)
158 #define SET_UNALIGNED_32(_pObject, _Value) (*(UNALIGNED UINT32 *)(_pObject)) = (UINT32)(_Value)
159 #define SET_UNALIGNED_64(_pObject, _Value) (*(UNALIGNED UINT64 *)(_pObject)) = (UINT64)(_Value)
161 #endif // defined(ALIGN_ACCESS) && !defined(_MSC_VER)
163 // Get Unaligned values from a potentially unaligned object and swap the value
164 #define GET_UNALIGNED_VAL16(_pObject) VAL16(GET_UNALIGNED_16(_pObject))
165 #define GET_UNALIGNED_VAL32(_pObject) VAL32(GET_UNALIGNED_32(_pObject))
166 #define GET_UNALIGNED_VAL64(_pObject) VAL64(GET_UNALIGNED_64(_pObject))
168 // Set a swap Value on an potentially unaligned object
169 #define SET_UNALIGNED_VAL16(_pObject, _Value) SET_UNALIGNED_16(_pObject, VAL16((UINT16)_Value))
170 #define SET_UNALIGNED_VAL32(_pObject, _Value) SET_UNALIGNED_32(_pObject, VAL32((UINT32)_Value))
171 #define SET_UNALIGNED_VAL64(_pObject, _Value) SET_UNALIGNED_64(_pObject, VAL64((UINT64)_Value))
173 #endif // __PAL_ENDIAN_H__