Source code of Windows XP (NT5)
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86 lines
1.8 KiB

#include <windows.h>
#include <shlwapi.h>
#include <idp.h>
#include <idaux.h>
ULONG
FusionpDbgPrintEx(
ULONG Level,
PCSTR Format,
...
)
{
return 0;
}
int
FusionpCompareStrings(
PCWSTR psz1,
SIZE_T cch1,
PCWSTR psz2,
SIZE_T cch2,
bool fCaseInsensitive
)
{
if (fCaseInsensitive)
return StrCmpI(psz1, psz2);
else
return StrCmp(psz1, psz2);
}
BOOL
FusionpHashUnicodeString(
PCWSTR String,
SIZE_T cch,
PULONG HashValue,
DWORD dwCmpFlags
)
{
BOOL fSuccess = FALSE;
FN_TRACE_WIN32(fSuccess);
ULONG TmpHashValue = 0;
if (HashValue != NULL)
*HashValue = 0;
//PARAMETER_CHECK((dwCmpFlags == 0) || (dwCmpFlags == (NORM_IGNORECASE|SORT_STRINGSORT))); // ?safe
PARAMETER_CHECK((dwCmpFlags == 0) || (dwCmpFlags & NORM_IGNORECASE)); // ?safe
PARAMETER_CHECK(HashValue != NULL);
if (dwCmpFlags & NORM_IGNORECASE)
dwCmpFlags |= SORT_STRINGSORT;
//
// Note that if you change this implementation, you have to have the implementation inside
// ntdll change to match it. Since that's hard and will affect everyone else in the world,
// DON'T CHANGE THIS ALGORITHM NO MATTER HOW GOOD OF AN IDEA IT SEEMS TO BE! This isn't the
// most perfect hashing algorithm, but its stability is critical to being able to match
// previously persisted hash values.
//
if (dwCmpFlags & NORM_IGNORECASE)
{
while (cch-- != 0)
{
WCHAR Char = *String++;
TmpHashValue = (TmpHashValue * 65599) + (WCHAR) ::CharUpperW((PWSTR) Char);
}
}
else
{
while (cch-- != 0)
TmpHashValue = (TmpHashValue * 65599) + *String++;
}
*HashValue = TmpHashValue;
fSuccess = TRUE;
Exit:
return fSuccess;
}