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Overview
| Comment: | Readability improvements for winRandomness. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
1640f814c7a5210f08c81e52e5a3fb89 |
| User & Date: | mistachkin 2016-02-15 22:37:18 |
Context
|
2016-02-15
| ||
| 23:46 | Fix a harmless compiler warning in FTS5. check-in: e52c9075 user: drh tags: trunk | |
| 22:37 | Readability improvements for winRandomness. check-in: 1640f814 user: mistachkin tags: trunk | |
| 22:28 | Fix comment. No changes to code. check-in: 2e1f2eff user: mistachkin tags: trunk | |
Changes
Changes to src/os_win.c.
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for(j=0, k=p->i; j<sz; j++){
p->a[k++] ^= x[j];
if( k>=p->na ) k = 0;
}
p->i = k;
p->nXor += sz;
}
#endif
/*
** Write up to nBuf bytes of randomness into zBuf.
*/
static int winRandomness(sqlite3_vfs *pVfs, int nBuf, char *zBuf){
#if defined(SQLITE_TEST) || defined(SQLITE_OMIT_RANDOMNESS)
UNUSED_PARAMETER(pVfs);
................................................................................
return nBuf;
#else
EntropyGatherer e;
UNUSED_PARAMETER(pVfs);
memset(zBuf, 0, nBuf);
#if defined(_MSC_VER) && _MSC_VER>=1400
rand_s((int*)zBuf); /* rand_s() is not available with MinGW */
#endif
e.a = (unsigned char*)zBuf;
e.na = nBuf;
e.nXor = 0;
e.i = 0;
{
SYSTEMTIME x;
osGetSystemTime(&x);
xorMemory(&e, (unsigned char*)&x, sizeof(x));
}
{
DWORD pid = osGetCurrentProcessId();
xorMemory(&e, (unsigned char*)&pid, sizeof(pid));
}
#if SQLITE_OS_WINRT
{
ULONGLONG cnt = osGetTickCount64();
xorMemory(&e, (unsigned char*)&cnt, sizeof(cnt));
}
#else
{
DWORD cnt = osGetTickCount();
xorMemory(&e, (unsigned char*)&cnt, sizeof(cnt));
}
#endif
{
LARGE_INTEGER i;
osQueryPerformanceCounter(&i);
xorMemory(&e, (unsigned char*)&i, sizeof(i));
}
#if !SQLITE_OS_WINCE && !SQLITE_OS_WINRT && SQLITE_WIN32_USE_UUID
{
UUID id;
memset(&id, 0, sizeof(UUID));
osUuidCreate(&id);
xorMemory(&e, (unsigned char*)&id, sizeof(UUID));
memset(&id, 0, sizeof(UUID));
osUuidCreateSequential(&id);
xorMemory(&e, (unsigned char*)&id, sizeof(UUID));
}
#endif
return e.nXor>nBuf ? nBuf : e.nXor;
#endif /* defined(SQLITE_TEST) || defined(SQLITE_OMIT_RANDOMNESS) */
}
/*
** Sleep for a little while. Return the amount of time slept.
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....
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for(j=0, k=p->i; j<sz; j++){
p->a[k++] ^= x[j];
if( k>=p->na ) k = 0;
}
p->i = k;
p->nXor += sz;
}
#endif /* !defined(SQLITE_TEST) && !defined(SQLITE_OMIT_RANDOMNESS) */
/*
** Write up to nBuf bytes of randomness into zBuf.
*/
static int winRandomness(sqlite3_vfs *pVfs, int nBuf, char *zBuf){
#if defined(SQLITE_TEST) || defined(SQLITE_OMIT_RANDOMNESS)
UNUSED_PARAMETER(pVfs);
................................................................................
return nBuf;
#else
EntropyGatherer e;
UNUSED_PARAMETER(pVfs);
memset(zBuf, 0, nBuf);
#if defined(_MSC_VER) && _MSC_VER>=1400
rand_s((int*)zBuf); /* rand_s() is not available with MinGW */
#endif /* defined(_MSC_VER) && _MSC_VER>=1400 */
e.a = (unsigned char*)zBuf;
e.na = nBuf;
e.nXor = 0;
e.i = 0;
{
SYSTEMTIME x;
osGetSystemTime(&x);
xorMemory(&e, (unsigned char*)&x, sizeof(SYSTEMTIME));
}
{
DWORD pid = osGetCurrentProcessId();
xorMemory(&e, (unsigned char*)&pid, sizeof(DWORD));
}
#if SQLITE_OS_WINRT
{
ULONGLONG cnt = osGetTickCount64();
xorMemory(&e, (unsigned char*)&cnt, sizeof(ULONGLONG));
}
#else
{
DWORD cnt = osGetTickCount();
xorMemory(&e, (unsigned char*)&cnt, sizeof(DWORD));
}
#endif /* SQLITE_OS_WINRT */
{
LARGE_INTEGER i;
osQueryPerformanceCounter(&i);
xorMemory(&e, (unsigned char*)&i, sizeof(LARGE_INTEGER));
}
#if !SQLITE_OS_WINCE && !SQLITE_OS_WINRT && SQLITE_WIN32_USE_UUID
{
UUID id;
memset(&id, 0, sizeof(UUID));
osUuidCreate(&id);
xorMemory(&e, (unsigned char*)&id, sizeof(UUID));
memset(&id, 0, sizeof(UUID));
osUuidCreateSequential(&id);
xorMemory(&e, (unsigned char*)&id, sizeof(UUID));
}
#endif /* !SQLITE_OS_WINCE && !SQLITE_OS_WINRT && SQLITE_WIN32_USE_UUID */
return e.nXor>nBuf ? nBuf : e.nXor;
#endif /* defined(SQLITE_TEST) || defined(SQLITE_OMIT_RANDOMNESS) */
}
/*
** Sleep for a little while. Return the amount of time slept.
|