207 lines
4.6 KiB
C
207 lines
4.6 KiB
C
/*++
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Copyright (c) 1989-2000 Microsoft Corporation
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Module Name:
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guid.c
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Abstract:
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GUID-related utilities that run on win9x and nt4 as
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well as win2k and whistler
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Author:
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vadimb created sometime in 2001
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Revision History:
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--*/
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#include "sdbp.h"
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#include "initguid.h"
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#if defined(KERNEL_MODE) && defined(ALLOC_DATA_PRAGMA)
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#pragma data_seg()
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#endif // KERNEL_MODE && ALLOC_DATA_PRAGMA
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const TCHAR g_szGuidFormat[] = TEXT("{%08lx-%04hx-%04hx-%02hx%02hx-%02hx%02hx%02hx%02hx%02hx%02hx}");
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#if defined(KERNEL_MODE) && defined(ALLOC_PRAGMA)
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#pragma alloc_text(PAGE, SdbpGUIDToUnicodeString)
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#pragma alloc_text(PAGE, SdbpFreeUnicodeString)
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#pragma alloc_text(PAGE, SdbGUIDToString)
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#endif // KERNEL_MODE && ALLOC_PRAGMA
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//
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// GUID string buffer size (in chars) not including the term null char
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//
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#define GUID_STRING_SIZE 38
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DEFINE_GUID(STATIC_NULL_GUID, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, \
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0x0, 0x0, 0x0, 0x0);
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BOOL
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SDBAPI
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SdbIsNullGUID(
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IN GUID* pGuid
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)
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{
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return pGuid == NULL ||
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RtlEqualMemory(pGuid, &STATIC_NULL_GUID, sizeof(*pGuid));
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}
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#if defined(NT_MODE) || defined(KERNEL_MODE)
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BOOL
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SDBAPI
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SdbGUIDFromString(
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IN LPCWSTR lpszGuid,
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OUT GUID* pGuid
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)
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/*++
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Return: TRUE on success, FALSE otherwise.
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Desc: Converts a string to a GUID.
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--*/
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{
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UNICODE_STRING ustrGuid;
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NTSTATUS status;
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RtlInitUnicodeString(&ustrGuid, lpszGuid);
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status = RtlGUIDFromString(&ustrGuid, pGuid);
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return NT_SUCCESS(status);
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}
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#else // we do the same thing for both WIN32A and WIN32U
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BOOL
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SdbGUIDFromString(
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LPCTSTR lpszGuid,
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GUID* pGuid)
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{
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int nFields;
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DWORD rgData4[8];
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DWORD dwData2;
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DWORD dwData3;
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INT i;
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nFields = _stscanf(lpszGuid, g_szGuidFormat,
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&pGuid->Data1, // type : long
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&dwData2, // type : short
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&dwData3, // type : short
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&rgData4[0],// type : short all the way to the bottom
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&rgData4[1],
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&rgData4[2],
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&rgData4[3],
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&rgData4[4],
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&rgData4[5],
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&rgData4[6],
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&rgData4[7]);
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if (nFields == 11) {
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pGuid->Data2 = (USHORT)dwData2;
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pGuid->Data3 = (USHORT)dwData3;
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for (i = 0; i < 8; ++i) {
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pGuid->Data4[i] = (BYTE)rgData4[i];
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}
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}
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return (nFields == 11);
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}
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#endif
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#ifndef WIN32A_MODE
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//
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// Private Functions used internally
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//
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NTSTATUS
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SdbpGUIDToUnicodeString(
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IN GUID* pGuid,
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OUT PUNICODE_STRING pUnicodeString
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)
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/*++
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Return: BUGBUG: ?
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Desc: BUGBUG: ?
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--*/
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{
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pUnicodeString->Length = GUID_STRING_SIZE * sizeof(WCHAR);
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pUnicodeString->MaximumLength = pUnicodeString->Length + sizeof(UNICODE_NULL);
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pUnicodeString->Buffer = SdbAlloc(pUnicodeString->MaximumLength);
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if (pUnicodeString->Buffer == NULL) {
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DBGPRINT((sdlError,
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"SdbpGUIDToUnicodeString",
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"Failed to allocate %ld bytes for GUID\n",
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(DWORD)pUnicodeString->MaximumLength));
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return STATUS_NO_MEMORY;
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}
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swprintf(pUnicodeString->Buffer, g_szGuidFormat,
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pGuid->Data1,
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pGuid->Data2,
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pGuid->Data3,
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pGuid->Data4[0],
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pGuid->Data4[1],
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pGuid->Data4[2],
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pGuid->Data4[3],
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pGuid->Data4[4],
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pGuid->Data4[5],
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pGuid->Data4[6],
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pGuid->Data4[7]);
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return STATUS_SUCCESS;
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}
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VOID
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SdbpFreeUnicodeString(
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PUNICODE_STRING pUnicodeString
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)
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/*++
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Return: BUGBUG: ?
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Desc: BUGBUG: ?
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--*/
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{
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if (pUnicodeString->Buffer != NULL) {
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SdbFree(pUnicodeString->Buffer);
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RtlZeroMemory(pUnicodeString, sizeof(*pUnicodeString));
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}
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}
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#endif // WIN32A_MODE
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BOOL
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SDBAPI
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SdbGUIDToString(
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IN GUID* pGuid,
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OUT LPTSTR pszGuid
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)
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{
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_stprintf(pszGuid, g_szGuidFormat,
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pGuid->Data1,
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pGuid->Data2,
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pGuid->Data3,
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pGuid->Data4[0],
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pGuid->Data4[1],
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pGuid->Data4[2],
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pGuid->Data4[3],
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pGuid->Data4[4],
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pGuid->Data4[5],
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pGuid->Data4[6],
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pGuid->Data4[7]);
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return TRUE;
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}
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