blob: bc9f7be3f5828a07846ddba626da78d94a18f681 [file] [log] [blame] [edit]
// MyWindows.cpp
#include "StdAfx.h"
#ifndef _WIN32
#include <stdlib.h>
#include "MyWindows.h"
static inline void *AllocateForBSTR(size_t cb) { return ::malloc(cb); }
static inline void FreeForBSTR(void *pv) { ::free(pv);}
/* Win32 uses DWORD (32-bit) type to store size of string before (OLECHAR *) string.
We must select CBstrSizeType for another systems (not Win32):
if (CBstrSizeType is UINT32),
then we support only strings smaller than 4 GB.
Win32 version always has that limitation.
if (CBstrSizeType is UINT),
(UINT can be 16/32/64-bit)
We can support strings larger than 4 GB (if UINT is 64-bit),
but sizeof(UINT) can be different in parts compiled by
different compilers/settings,
and we can't send such BSTR strings between such parts.
*/
typedef UINT32 CBstrSizeType;
// typedef UINT CBstrSizeType;
#define k_BstrSize_Max 0xFFFFFFFF
// #define k_BstrSize_Max UINT_MAX
// #define k_BstrSize_Max ((UINT)(INT)-1)
BSTR SysAllocStringByteLen(LPCSTR s, UINT len)
{
/* Original SysAllocStringByteLen in Win32 maybe fills only unaligned null OLECHAR at the end.
We provide also aligned null OLECHAR at the end. */
if (len >= (k_BstrSize_Max - sizeof(OLECHAR) - sizeof(OLECHAR) - sizeof(CBstrSizeType)))
return NULL;
UINT size = (len + sizeof(OLECHAR) + sizeof(OLECHAR) - 1) & ~(sizeof(OLECHAR) - 1);
void *p = AllocateForBSTR(size + sizeof(CBstrSizeType));
if (!p)
return NULL;
*(CBstrSizeType *)p = (CBstrSizeType)len;
BSTR bstr = (BSTR)((CBstrSizeType *)p + 1);
if (s)
memcpy(bstr, s, len);
for (; len < size; len++)
((Byte *)bstr)[len] = 0;
return bstr;
}
BSTR SysAllocStringLen(const OLECHAR *s, UINT len)
{
if (len >= (k_BstrSize_Max - sizeof(OLECHAR) - sizeof(CBstrSizeType)) / sizeof(OLECHAR))
return NULL;
UINT size = len * sizeof(OLECHAR);
void *p = AllocateForBSTR(size + sizeof(CBstrSizeType) + sizeof(OLECHAR));
if (!p)
return NULL;
*(CBstrSizeType *)p = (CBstrSizeType)size;
BSTR bstr = (BSTR)((CBstrSizeType *)p + 1);
if (s)
memcpy(bstr, s, size);
bstr[len] = 0;
return bstr;
}
BSTR SysAllocString(const OLECHAR *s)
{
if (!s)
return 0;
const OLECHAR *s2 = s;
while (*s2 != 0)
s2++;
return SysAllocStringLen(s, (UINT)(s2 - s));
}
void SysFreeString(BSTR bstr)
{
if (bstr)
FreeForBSTR((CBstrSizeType *)bstr - 1);
}
UINT SysStringByteLen(BSTR bstr)
{
if (!bstr)
return 0;
return *((CBstrSizeType *)bstr - 1);
}
UINT SysStringLen(BSTR bstr)
{
if (!bstr)
return 0;
return *((CBstrSizeType *)bstr - 1) / sizeof(OLECHAR);
}
HRESULT VariantClear(VARIANTARG *prop)
{
if (prop->vt == VT_BSTR)
SysFreeString(prop->bstrVal);
prop->vt = VT_EMPTY;
return S_OK;
}
HRESULT VariantCopy(VARIANTARG *dest, const VARIANTARG *src)
{
HRESULT res = ::VariantClear(dest);
if (res != S_OK)
return res;
if (src->vt == VT_BSTR)
{
dest->bstrVal = SysAllocStringByteLen((LPCSTR)src->bstrVal,
SysStringByteLen(src->bstrVal));
if (!dest->bstrVal)
return E_OUTOFMEMORY;
dest->vt = VT_BSTR;
}
else
*dest = *src;
return S_OK;
}
LONG CompareFileTime(const FILETIME* ft1, const FILETIME* ft2)
{
if (ft1->dwHighDateTime < ft2->dwHighDateTime) return -1;
if (ft1->dwHighDateTime > ft2->dwHighDateTime) return 1;
if (ft1->dwLowDateTime < ft2->dwLowDateTime) return -1;
if (ft1->dwLowDateTime > ft2->dwLowDateTime) return 1;
return 0;
}
DWORD GetLastError()
{
return 0;
}
#endif