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Define and use endian conversion macros for big-endian machines.

This commit is contained in:
Juan Lang 2005-04-24 17:22:26 +00:00 committed by Alexandre Julliard
parent 576aa4a6d8
commit b99dfb0c1a
2 changed files with 35 additions and 8 deletions
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14
dlls/ole32/storage32.c
View File

@ -4051,27 +4051,33 @@ StorageInternalImpl* StorageInternalImpl_Construct(
/******************************************************************************
** StorageUtl implementation
* FIXME: these should read and write in little-endian order on all
* architectures, but right now just assume the host is little-endian.
*/
void StorageUtl_ReadWord(const BYTE* buffer, ULONG offset, WORD* value)
{
memcpy(value, buffer+offset, sizeof(WORD));
WORD tmp;
memcpy(&tmp, buffer+offset, sizeof(WORD));
*value = le16toh(tmp);
}
void StorageUtl_WriteWord(BYTE* buffer, ULONG offset, WORD value)
{
value = htole16(value);
memcpy(buffer+offset, &value, sizeof(WORD));
}
void StorageUtl_ReadDWord(const BYTE* buffer, ULONG offset, DWORD* value)
{
memcpy(value, buffer+offset, sizeof(DWORD));
DWORD tmp;
memcpy(&tmp, buffer+offset, sizeof(DWORD));
*value = le32toh(tmp);
}
void StorageUtl_WriteDWord(BYTE* buffer, ULONG offset, DWORD value)
{
value = htole32(value);
memcpy(buffer+offset, &value, sizeof(DWORD));
}

29
dlls/ole32/storage32.h
View File

@ -35,6 +35,8 @@
#include "winbase.h"
#include "winnt.h"
#include "objbase.h"
#include "winreg.h"
#include "winternl.h"
/*
* Definitions for the file format offsets.
@ -524,10 +526,29 @@ StgStreamImpl* StgStreamImpl_Construct(
ULONG ownerProperty);
/********************************************************************************
* The StorageUtl_ functions are miscelaneous utility functions. Most of which are
* abstractions used to read values from file buffers without having to worry
* about bit order
/******************************************************************************
* Endian conversion macros
*/
#ifdef WORDS_BIGENDIAN
#define htole32(x) RtlUlongByteSwap(x)
#define htole16(x) RtlUshortByteSwap(x)
#define le32toh(x) RtlUlongByteSwap(x)
#define le16toh(x) RtlUshortByteSwap(x)
#else
#define htole32(x) (x)
#define htole16(x) (x)
#define le32toh(x) (x)
#define le16toh(x) (x)
#endif
/******************************************************************************
* The StorageUtl_ functions are miscellaneous utility functions. Most of which
* are abstractions used to read values from file buffers without having to
* worry about bit order
*/
void StorageUtl_ReadWord(const BYTE* buffer, ULONG offset, WORD* value);
void StorageUtl_WriteWord(BYTE* buffer, ULONG offset, WORD value);