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// MyWindows.cpp
#include "StdAfx.h"
#ifndef _WIN32
#include <stdlib.h>
#include <time.h>
#ifdef __GNUC__
#include <sys/time.h>
#endif
#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 - (UINT)sizeof(OLECHAR) - (UINT)sizeof(OLECHAR) - (UINT)sizeof(CBstrSizeType)))
return NULL;
UINT size = (len + (UINT)sizeof(OLECHAR) + (UINT)sizeof(OLECHAR) - 1) & ~((UINT)sizeof(OLECHAR) - 1);
void *p = AllocateForBSTR(size + (UINT)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 - (UINT)sizeof(OLECHAR) - (UINT)sizeof(CBstrSizeType)) / (UINT)sizeof(OLECHAR))
return NULL;
UINT size = len * (UINT)sizeof(OLECHAR);
void *p = AllocateForBSTR(size + (UINT)sizeof(CBstrSizeType) + (UINT)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) / (UINT)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 (DWORD)errno;
}
void SetLastError(DWORD dw)
{
errno = (int)dw;
}
static LONG TIME_GetBias()
{
time_t utc = time(NULL);
struct tm *ptm = localtime(&utc);
int localdaylight = ptm->tm_isdst; /* daylight for local timezone */
ptm = gmtime(&utc);
ptm->tm_isdst = localdaylight; /* use local daylight, not that of Greenwich */
LONG bias = (int)(mktime(ptm)-utc);
return bias;
}
#define TICKS_PER_SEC 10000000
/*
#define SECS_PER_DAY (24 * 60 * 60)
#define SECS_1601_TO_1970 ((369 * 365 + 89) * (UInt64)SECS_PER_DAY)
#define TICKS_1601_TO_1970 (SECS_1601_TO_1970 * TICKS_PER_SEC)
*/
#define GET_TIME_64(pft) ((pft)->dwLowDateTime | ((UInt64)(pft)->dwHighDateTime << 32))
#define SET_FILETIME(ft, v64) \
(ft)->dwLowDateTime = (DWORD)v64; \
(ft)->dwHighDateTime = (DWORD)(v64 >> 32);
BOOL WINAPI FileTimeToLocalFileTime(const FILETIME *fileTime, FILETIME *localFileTime)
{
UInt64 v = GET_TIME_64(fileTime);
v = (UInt64)((Int64)v - (Int64)TIME_GetBias() * TICKS_PER_SEC);
SET_FILETIME(localFileTime, v);
return TRUE;
}
BOOL WINAPI LocalFileTimeToFileTime(const FILETIME *localFileTime, FILETIME *fileTime)
{
UInt64 v = GET_TIME_64(localFileTime);
v = (UInt64)((Int64)v + (Int64)TIME_GetBias() * TICKS_PER_SEC);
SET_FILETIME(fileTime, v);
return TRUE;
}
/*
VOID WINAPI GetSystemTimeAsFileTime(FILETIME *ft)
{
UInt64 t = 0;
timeval tv;
if (gettimeofday(&tv, NULL) == 0)
{
t = tv.tv_sec * (UInt64)TICKS_PER_SEC + TICKS_1601_TO_1970;
t += tv.tv_usec * 10;
}
SET_FILETIME(ft, t);
}
*/
DWORD WINAPI GetTickCount(VOID)
{
#ifndef _WIN32
// gettimeofday() doesn't work in some MINGWs by unknown reason
timeval tv;
if (gettimeofday(&tv, NULL) == 0)
{
// tv_sec and tv_usec are (long)
return (DWORD)((UInt64)(Int64)tv.tv_sec * (UInt64)1000 + (UInt64)(Int64)tv.tv_usec / 1000);
}
#endif
return (DWORD)time(NULL) * 1000;
}
#define PERIOD_4 (4 * 365 + 1)
#define PERIOD_100 (PERIOD_4 * 25 - 1)
#define PERIOD_400 (PERIOD_100 * 4 + 1)
BOOL WINAPI FileTimeToSystemTime(const FILETIME *ft, SYSTEMTIME *st)
{
UInt32 v;
UInt64 v64 = GET_TIME_64(ft);
v64 /= 10000;
st->wMilliseconds = (WORD)(v64 % 1000); v64 /= 1000;
st->wSecond = (WORD)(v64 % 60); v64 /= 60;
st->wMinute = (WORD)(v64 % 60); v64 /= 60;
v = (UInt32)v64;
st->wHour = (WORD)(v % 24); v /= 24;
// 1601-01-01 was Monday
st->wDayOfWeek = (WORD)((v + 1) % 7);
UInt32 leaps, year, day, mon;
leaps = (3 * ((4 * v + (365 - 31 - 28) * 4 + 3) / PERIOD_400) + 3) / 4;
v += 28188 + leaps;
// leaps - the number of exceptions from PERIOD_4 rules starting from 1600-03-01
// (1959 / 64) - converts day from 03-01 to month
year = (20 * v - 2442) / (5 * PERIOD_4);
day = v - (year * PERIOD_4) / 4;
mon = (64 * day) / 1959;
st->wDay = (WORD)(day - (1959 * mon) / 64);
mon -= 1;
year += 1524;
if (mon > 12)
{
mon -= 12;
year++;
}
st->wMonth = (WORD)mon;
st->wYear = (WORD)year;
/*
unsigned year, mon;
unsigned char ms[] = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
unsigned t;
year = (WORD)(1601 + v / PERIOD_400 * 400);
v %= PERIOD_400;
t = v / PERIOD_100; if (t == 4) t = 3; year += t * 100; v -= t * PERIOD_100;
t = v / PERIOD_4; if (t == 25) t = 24; year += t * 4; v -= t * PERIOD_4;
t = v / 365; if (t == 4) t = 3; year += t; v -= t * 365;
st->wYear = (WORD)year;
if (year % 4 == 0 && (year % 100 != 0 || year % 400 == 0))
ms[1] = 29;
for (mon = 0;; mon++)
{
unsigned d = ms[mon];
if (v < d)
break;
v -= d;
}
st->wDay = (WORD)(v + 1);
st->wMonth = (WORD)(mon + 1);
*/
return TRUE;
}
#endif
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