windows-nt/Source/XPSP1/NT/base/ntsetup/textmode/kernel/spdrutil.c

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2020-09-26 03:20:57 -05:00
/*++
Copyright (c) 2000 Microsoft Corporation
Module Name:
spdrutil.c
Abstract:
This module contains general utility and helper functions used by ASR
in textmode Setup.
Authors:
Michael Peterson, Seagate Software (v-michpe) 13-May-1997
Guhan Suriyanarayanan (guhans) 21-Aug-1999
Environment:
Textmode Setup, Kernel-mode.
Revision History:
21-Aug-1999 guhans
Code clean-up and re-write.
13-May-1997 v-michpe
Initial implementation.
--*/
#include "spprecmp.h"
#pragma hdrstop
#define THIS_MODULE L"spdrutil.c"
#define THIS_MODULE_CODE L"U"
static const PCWSTR ASR_MOUNTED_DEVICES_KEY = L"\\registry\\machine\\SYSTEM\\MountedDevices";
static const PCWSTR ASR_HKLM_SYSTEM_KEY = L"\\registry\\machine\\SYSTEM";
#ifndef ULONGLONG_MAX
#define ULONGLONG_MAX (0xFFFFFFFFFFFFFFFF)
#endif
//
// Caller must free the string
//
PWSTR
SpAsrGetRegionName(IN PDISK_REGION pRegion)
{
SpNtNameFromRegion(
pRegion,
(PWSTR) TemporaryBuffer,
sizeof(TemporaryBuffer),
PartitionOrdinalCurrent
);
return SpDupStringW((PWSTR)TemporaryBuffer);
}
ULONG
SpAsrGetActualDiskSignature(IN ULONG DiskNumber)
{
PHARD_DISK pDisk = &HardDisks[DiskNumber];
ULONG Signature = 0;
if (PARTITION_STYLE_MBR == (PARTITION_STYLE) pDisk->DriveLayout.PartitionStyle) {
Signature = pDisk->DriveLayout.Mbr.Signature;
}
return Signature;
}
ULONGLONG
SpAsrConvertSectorsToMB(
IN ULONGLONG SectorCount,
IN ULONG BytesPerSector
)
{
ULONGLONG mb = 1024 * 1024;
if ((ULONGLONG) (SectorCount / mb) > (ULONGLONG) (ULONGLONG_MAX / BytesPerSector)) {
//
// This is strange. The sizeMB of the disk is too big to fit in 64-bits,
// yet the SectorCount does. This implies that this disk has more than
// 1 MB Per Sector. Since this is very improbable (disks commonly have 512
// BytesPerSector today), we bail out with an internal error.
//
DbgFatalMesg((_asrerr, "SpAsrConvertSectorsToMB. Disk has too many sectors\n"));
INTERNAL_ERROR((L"Disk has too many sectors\n")); // ok
}
return (ULONGLONG) ((SectorCount * BytesPerSector) / mb);
}
extern
VOID
SpDeleteStorageVolumes (
IN HANDLE SysPrepRegHandle,
IN DWORD ControlSetNumber
);
extern
NTSTATUS
SpGetCurrentControlSetNumber(
IN HANDLE SystemHiveRoot,
OUT PULONG Number
);
VOID
SpAsrDeleteMountedDevicesKey(VOID)
{
NTSTATUS status;
OBJECT_ATTRIBUTES objAttrib;
UNICODE_STRING unicodeString;
HANDLE keyHandle;
//
// Delete HKLM\SYSTEM\MountedDevices.
//
INIT_OBJA(&objAttrib, &unicodeString, ASR_MOUNTED_DEVICES_KEY);
objAttrib.RootDirectory = NULL;
status = ZwOpenKey(&keyHandle, KEY_ALL_ACCESS, &objAttrib);
if(NT_SUCCESS(status)) {
status = ZwDeleteKey(keyHandle);
DbgStatusMesg((_asrinfo,
"SpAsrDeleteMountedDevicesKey. DeleteKey [%ls] on the setup hive returned 0x%lx. \n",
ASR_MOUNTED_DEVICES_KEY,
status
));
ZwClose(keyHandle);
}
else {
DbgErrorMesg((_asrwarn,
"SpAsrDeleteMountedDevicesKey. No [%ls] on the setup hive.\n",
ASR_MOUNTED_DEVICES_KEY));
}
}
PVOID
SpAsrMemAlloc(
ULONG Size,
BOOLEAN IsErrorFatal
)
{
PVOID ptr = SpMemAlloc(Size);
if (ptr) {
RtlZeroMemory(ptr, Size);
}
else { // allocation failed
if (IsErrorFatal) {
DbgFatalMesg((_asrerr,
"SpAsrMemAlloc. Memory allocation failed, SpMemAlloc(%lu) returned NULL.\n",
Size
));
SpAsrRaiseFatalError(SP_SCRN_OUT_OF_MEMORY, L"Out of memory.");
}
else {
DbgErrorMesg((_asrerr,
"SpAsrMemAlloc. Memory allocation failed, SpMemAlloc(%lu) returned NULL. Continuing.\n",
Size
));
}
}
return ptr;
}
BOOLEAN
SpAsrIsValidBootDrive(IN OUT PWSTR NtDir)
/*
Returns TRUE if NtDir starts with ?:\,
where ? is between C and Z or c and z,
and wcslen(NtDir) <= SpGetMaxNtDirLen().
Converts the drive letter to uppercase.
*/
{
if (!NtDir ||
wcslen(NtDir) > SpGetMaxNtDirLen()
) {
return FALSE;
}
// convert drive-letter to upper-case
if (NtDir[0] >= L'c' && NtDir[0] <= L'z') {
NtDir[0] = NtDir[0] - L'a' + L'A';
}
// check drive letter
if (NtDir[0] < L'C' || NtDir[0] > L'Z') {
return FALSE;
}
// check " :\"
if (NtDir[1] == L':' && NtDir[2] == L'\\') {
return TRUE;
}
return FALSE;
}
BOOLEAN
SpAsrIsBootPartitionRecord(IN ULONG CriticalPartitionFlag)
{
return (BOOLEAN) (CriticalPartitionFlag & ASR_PTN_MASK_BOOT);
}
BOOLEAN
SpAsrIsSystemPartitionRecord(IN ULONG CriticalPartitionFlag)
{
return (BOOLEAN) (CriticalPartitionFlag & ASR_PTN_MASK_SYS);
}
// Fatal Error Routines
// -guhans! Lots of code-repitition here, there must be a more efficient way.
VOID
SpAsrRaiseFatalError(
IN ULONG ErrorCode,
IN PWSTR KdPrintStr
)
/*++
Routine:
Terminate setup
Returns:
None.
--*/
{
KdPrintEx((_asrerr, "SETUP: + %ws\n", KdPrintStr));
SpStartScreen(ErrorCode,
3,
HEADER_HEIGHT+1,
FALSE,
FALSE,
DEFAULT_ATTRIBUTE);
SpDisplayStatusOptions(DEFAULT_STATUS_ATTRIBUTE,
SP_STAT_F3_EQUALS_EXIT,
0);
SpInputDrain();
while(SpInputGetKeypress() != KEY_F3);
SpDone(0, FALSE, TRUE);
}
VOID
SpAsrRaiseFatalErrorWs(
IN ULONG ErrorCode,
IN PWSTR KdPrintStr,
IN PWSTR MessageStr
)
{
KdPrintEx((_asrerr, "SETUP: + %ws\n", KdPrintStr));
SpStartScreen(ErrorCode,
3,
HEADER_HEIGHT+1,
FALSE,
FALSE,
DEFAULT_ATTRIBUTE,
MessageStr
);
SpDisplayStatusOptions(DEFAULT_STATUS_ATTRIBUTE, SP_STAT_F3_EQUALS_EXIT, 0);
SpInputDrain();
while(SpInputGetKeypress() != KEY_F3);
SpDone(0, FALSE, TRUE);
}
VOID
SpAsrRaiseFatalErrorWsWs(
IN ULONG ErrorCode,
IN PWSTR KdPrintStr,
IN PWSTR MessageStr1,
IN PWSTR MessageStr2
)
{
KdPrintEx((_asrerr, "SETUP: + %ws\n", KdPrintStr));
SpStartScreen(ErrorCode,
3,
HEADER_HEIGHT+1,
FALSE,
FALSE,
DEFAULT_ATTRIBUTE,
MessageStr1,
MessageStr2
);
SpDisplayStatusOptions(DEFAULT_STATUS_ATTRIBUTE, SP_STAT_F3_EQUALS_EXIT, 0);
SpInputDrain();
while(SpInputGetKeypress() != KEY_F3);
SpDone(0, FALSE, TRUE);
}
VOID
SpAsrRaiseFatalErrorWsLu(
IN ULONG ErrorCode,
IN PWSTR KdPrintStr,
IN PWSTR MessageStr,
IN ULONG MessageVal
)
{
KdPrintEx((_asrerr, "SETUP: + %ws\n", KdPrintStr));
SpStartScreen(ErrorCode,
3,
HEADER_HEIGHT+1,
FALSE,
FALSE,
DEFAULT_ATTRIBUTE,
MessageStr,
MessageVal
);
SpDisplayStatusOptions(DEFAULT_STATUS_ATTRIBUTE, SP_STAT_F3_EQUALS_EXIT, 0);
SpInputDrain();
while(SpInputGetKeypress() != KEY_F3);
SpDone(0, FALSE, TRUE);
}
VOID
SpAsrRaiseFatalErrorLu(
IN ULONG ErrorCode,
IN PWSTR KdPrintStr,
IN ULONG MessageVal
)
{
KdPrintEx((_asrerr, "SETUP: + %ws\n", KdPrintStr));
SpStartScreen(ErrorCode,
3,
HEADER_HEIGHT+1,
FALSE,
FALSE,
DEFAULT_ATTRIBUTE,
MessageVal
);
SpDisplayStatusOptions(DEFAULT_STATUS_ATTRIBUTE, SP_STAT_F3_EQUALS_EXIT, 0);
SpInputDrain();
while(SpInputGetKeypress() != KEY_F3);
SpDone(0, FALSE, TRUE);
}
VOID
SpAsrRaiseFatalErrorLuLu(
IN ULONG ErrorCode,
IN PWSTR KdPrintStr,
IN ULONG MessageVal1,
IN ULONG MessageVal2
)
{
KdPrintEx((_asrerr, "SETUP: + %ws\n", KdPrintStr));
SpStartScreen(ErrorCode,
3,
HEADER_HEIGHT+1,
FALSE,
FALSE,
DEFAULT_ATTRIBUTE,
MessageVal1,
MessageVal2
);
SpDisplayStatusOptions(DEFAULT_STATUS_ATTRIBUTE, SP_STAT_F3_EQUALS_EXIT, 0);
SpInputDrain();
while(SpInputGetKeypress() != KEY_F3);
SpDone(0, FALSE, TRUE);
}
#define ASCI_O 79
#define ASCI_o 111
//
// SpAsrFileErrorRetryIgnoreAbort
// Display an error screen if the file that we are trying to
// copy already exists on target system. Allows user to
// O = Over-write existing file
// ESC = Skip this file (preserve existing file)
// F3 = Exit from Setup
//
// Returns TRUE if the user chose overwrite
// FALSE if the user chose skip
// Does not return if the user hit ESC
//
BOOL
SpAsrFileErrorDeleteSkipAbort(
IN ULONG ErrorCode,
IN PWSTR DestinationFile
)
{
ULONG optionKeys[] = {KEY_F3, ASCI_ESC};
ULONG mnemonicKeys[] = {MnemonicOverwrite, 0};
ULONG *keysPtr;
BOOL done = FALSE,
overwriteFile = FALSE;
while (!done) {
SpStartScreen(
ErrorCode,
3,
HEADER_HEIGHT+1,
FALSE,
FALSE,
DEFAULT_ATTRIBUTE,
DestinationFile
);
keysPtr = optionKeys;
SpDisplayStatusOptions(
DEFAULT_STATUS_ATTRIBUTE,
SP_STAT_O_EQUALS_OVERWRITE,
SP_STAT_ESC_EQUALS_SKIP_FILE,
SP_STAT_F3_EQUALS_EXIT,
0
);
SpInputDrain();
switch(SpWaitValidKey(keysPtr,NULL,mnemonicKeys)) {
case (MnemonicOverwrite | KEY_MNEMONIC):
overwriteFile = TRUE;
done = TRUE;
break;
case ASCI_ESC:
overwriteFile = FALSE;
done = TRUE;
break;
case KEY_F3:
SpDone(0, FALSE, TRUE);
break;
}
}
return overwriteFile;
}
//
// SpAsrFileErrorRetryIgnoreAbort
// Display an error screen if the file could not be copied
// over to the target system. Allows user to
// ENTER = Retry
// ESC = Skip this file and continue
// F3 = Exit from Setup
//
// Returns TRUE if the user chose skip
// FALSE if the user chose retry
// Does not return if the user hit ESC
//
BOOL
SpAsrFileErrorRetrySkipAbort(
IN ULONG ErrorCode,
IN PWSTR SourceFile,
IN PWSTR Label,
IN PWSTR Vendor,
IN BOOL AllowSkip
)
{
ULONG optionKeys[] = {KEY_F3, ASCI_CR, ASCI_ESC};
ULONG mnemonicKeys[] = {0};
ULONG *keysPtr;
BOOL done = FALSE,
skipFile = FALSE;
while (!done) {
SpStartScreen(
ErrorCode,
3,
HEADER_HEIGHT+1,
FALSE,
FALSE,
DEFAULT_ATTRIBUTE,
SourceFile,
Label,
Vendor);
keysPtr = optionKeys;
if (AllowSkip) {
SpDisplayStatusOptions(
DEFAULT_STATUS_ATTRIBUTE,
SP_STAT_ENTER_EQUALS_RETRY,
SP_STAT_ESC_EQUALS_SKIP_FILE,
SP_STAT_F3_EQUALS_EXIT,
0);
}
else {
SpDisplayStatusOptions(
DEFAULT_STATUS_ATTRIBUTE,
SP_STAT_ENTER_EQUALS_RETRY,
SP_STAT_F3_EQUALS_EXIT,
0);
}
SpInputDrain();
switch(SpWaitValidKey(keysPtr,NULL,mnemonicKeys)) {
case ASCI_CR:
skipFile = FALSE;
done = TRUE;
break;
case ASCI_ESC:
if (AllowSkip) {
skipFile = TRUE;
done = TRUE;
}
break;
case KEY_F3:
SpDone(0, FALSE, TRUE);
break;
}
}
return skipFile;
}
VOID
SpAsrRaiseInternalError(
IN PWSTR ModuleName,
IN PWSTR ModuleCode,
IN ULONG LineNumber,
IN PWSTR KdPrintStr)
{
PWSTR TmpMsgBuf = SpAsrMemAlloc(4096 * sizeof(WCHAR), TRUE);
swprintf(TmpMsgBuf, L"%ws%lu", ModuleCode, LineNumber);
DbgFatalMesg((_asrerr,
" Internal Error (%ws:%lu %ws) %ws\n",
ModuleName,
LineNumber,
TmpMsgBuf,
KdPrintStr
));
SpAsrRaiseFatalErrorWs(SP_TEXT_DR_INTERNAL_ERROR,
KdPrintStr,
TmpMsgBuf
);
//
// Never gets here
//
}
ULONGLONG
SpAsrStringToULongLong(
IN PWSTR String,
OUT PWCHAR *EndOfValue,
IN unsigned Radix
)
{
PWSTR p;
BOOLEAN Negative;
ULONGLONG Accum,v;
WCHAR HighestDigitAllowed,HighestLetterAllowed;
WCHAR c;
//
// Validate radix, 0 or 2-36.
//
if((Radix == 1) || (Radix > 36)) {
if(EndOfValue) {
*EndOfValue = String;
}
return(0);
}
p = String;
//
// Skip whitespace.
//
while(SpIsSpace(*p)) {
p++;
}
//
// First char may be a plus or minus.
//
Negative = FALSE;
if(*p == L'-') {
Negative = TRUE;
p++;
} else {
if(*p == L'+') {
p++;
}
}
if(!Radix) {
if(*p == L'0') {
//
// Octal number
//
Radix = 8;
p++;
if((*p == L'x') || (*p == L'X')) {
//
// hex number
//
Radix = 16;
p++;
}
} else {
Radix = 10;
}
}
HighestDigitAllowed = (Radix < 10) ? L'0'+(WCHAR)(Radix-1) : L'9';
HighestLetterAllowed = (Radix > 10) ? L'A'+(WCHAR)(Radix-11) : 0;
Accum = 0;
while(1) {
c = *p;
if((c >= L'0') && (c <= HighestDigitAllowed)) {
v = c - L'0';
} else {
c = SpToUpper(c);
if((c >= L'A') && (c <= HighestLetterAllowed)) {
v = c - L'A' + 10;
} else {
break;
}
}
Accum *= Radix;
Accum += v;
p++;
}
if(EndOfValue) {
*EndOfValue = p;
}
return(Negative ? (0-Accum) : Accum);
}
LONGLONG
SpAsrStringToLongLong(
IN PWSTR String,
OUT PWCHAR *EndOfValue,
IN unsigned Radix
)
{
PWSTR p;
BOOLEAN Negative;
LONGLONG Accum,v;
WCHAR HighestDigitAllowed,HighestLetterAllowed;
WCHAR c;
//
// Validate radix, 0 or 2-36.
//
if((Radix == 1) || (Radix > 36)) {
if(EndOfValue) {
*EndOfValue = String;
}
return(0);
}
p = String;
//
// Skip whitespace.
//
while(SpIsSpace(*p)) {
p++;
}
//
// First char may be a plus or minus.
//
Negative = FALSE;
if(*p == L'-') {
Negative = TRUE;
p++;
} else {
if(*p == L'+') {
p++;
}
}
if(!Radix) {
if(*p == L'0') {
//
// Octal number
//
Radix = 8;
p++;
if((*p == L'x') || (*p == L'X')) {
//
// hex number
//
Radix = 16;
p++;
}
} else {
Radix = 10;
}
}
HighestDigitAllowed = (Radix < 10) ? L'0'+(WCHAR)(Radix-1) : L'9';
HighestLetterAllowed = (Radix > 10) ? L'A'+(WCHAR)(Radix-11) : 0;
Accum = 0;
while(1) {
c = *p;
if((c >= L'0') && (c <= HighestDigitAllowed)) {
v = c - L'0';
} else {
c = SpToUpper(c);
if((c >= L'A') && (c <= HighestLetterAllowed)) {
v = c - L'A' + 10;
} else {
break;
}
}
Accum *= Radix;
Accum += v;
p++;
}
if(EndOfValue) {
*EndOfValue = p;
}
return(Negative ? (0-Accum) : Accum);
}
ULONG
SpAsrStringToULong(
IN PWSTR String,
OUT PWCHAR *EndOfValue,
IN unsigned Radix
)
{
PWSTR p;
BOOLEAN Negative;
ULONG Accum,v;
WCHAR HighestDigitAllowed,HighestLetterAllowed;
WCHAR c;
//
// Validate radix, 0 or 2-36.
//
if((Radix == 1) || (Radix > 36)) {
if(EndOfValue) {
*EndOfValue = String;
}
return(0);
}
p = String;
//
// Skip whitespace.
//
while(SpIsSpace(*p)) {
p++;
}
//
// First char may be a plus or minus.
//
Negative = FALSE;
if(*p == L'-') {
Negative = TRUE;
p++;
} else {
if(*p == L'+') {
p++;
}
}
if(!Radix) {
if(*p == L'0') {
//
// Octal number
//
Radix = 8;
p++;
if((*p == L'x') || (*p == L'X')) {
//
// hex number
//
Radix = 16;
p++;
}
} else {
Radix = 10;
}
}
HighestDigitAllowed = (Radix < 10) ? L'0'+(WCHAR)(Radix-1) : L'9';
HighestLetterAllowed = (Radix > 10) ? L'A'+(WCHAR)(Radix-11) : 0;
Accum = 0;
while(1) {
c = *p;
if((c >= L'0') && (c <= HighestDigitAllowed)) {
v = c - L'0';
} else {
c = SpToUpper(c);
if((c >= L'A') && (c <= HighestLetterAllowed)) {
v = c - L'A' + 10;
} else {
break;
}
}
Accum *= Radix;
Accum += v;
p++;
}
if(EndOfValue) {
*EndOfValue = p;
}
return(Negative ? (0-Accum) : Accum);
}
USHORT
SpAsrStringToUShort(
IN PWSTR String,
OUT PWCHAR *EndOfValue,
IN USHORT Radix
)
{
PWSTR p;
BOOLEAN Negative;
USHORT Accum,v;
WCHAR HighestDigitAllowed,HighestLetterAllowed;
WCHAR c;
//
// Validate radix, 0 or 2-36.
//
if((Radix == 1) || (Radix > 36)) {
if(EndOfValue) {
*EndOfValue = String;
}
return(0);
}
p = String;
//
// Skip whitespace.
//
while(SpIsSpace(*p)) {
p++;
}
//
// First char may be a plus or minus.
//
Negative = FALSE;
if(*p == L'-') {
Negative = TRUE;
p++;
} else {
if(*p == L'+') {
p++;
}
}
if(!Radix) {
if(*p == L'0') {
//
// Octal number
//
Radix = 8;
p++;
if((*p == L'x') || (*p == L'X')) {
//
// hex number
//
Radix = 16;
p++;
}
} else {
Radix = 10;
}
}
HighestDigitAllowed = (Radix < 10) ? L'0'+(WCHAR)(Radix-1) : L'9';
HighestLetterAllowed = (Radix > 10) ? L'A'+(WCHAR)(Radix-11) : 0;
Accum = 0;
while(1) {
c = *p;
if((c >= L'0') && (c <= HighestDigitAllowed)) {
v = c - L'0';
} else {
c = SpToUpper(c);
if((c >= L'A') && (c <= HighestLetterAllowed)) {
v = c - L'A' + 10;
} else {
break;
}
}
Accum *= Radix;
Accum += v;
p++;
}
if(EndOfValue) {
*EndOfValue = p;
}
return(Negative ? (0-Accum) : Accum);
}
int
SpAsrCharToInt(
IN PWSTR String,
OUT PWCHAR *EndOfValue,
IN USHORT Radix
)
{
PWSTR p;
BOOLEAN Negative;
USHORT Accum,v;
WCHAR HighestDigitAllowed,HighestLetterAllowed;
WCHAR c;
//
// Validate radix, 0 or 2-36.
//
if((Radix == 1) || (Radix > 36)) {
if(EndOfValue) {
*EndOfValue = String;
}
return(0);
}
p = String;
//
// Skip whitespace.
//
while(SpIsSpace(*p)) {
p++;
}
//
// First char may be a plus or minus.
//
Negative = FALSE;
if(*p == L'-') {
Negative = TRUE;
p++;
} else {
if(*p == L'+') {
p++;
}
}
if(!Radix) {
if(*p == L'0') {
//
// Octal number
//
Radix = 8;
p++;
if((*p == L'x') || (*p == L'X')) {
//
// hex number
//
Radix = 16;
p++;
}
} else {
Radix = 10;
}
}
HighestDigitAllowed = (Radix < 10) ? L'0'+(WCHAR)(Radix-1) : L'9';
HighestLetterAllowed = (Radix > 10) ? L'A'+(WCHAR)(Radix-11) : 0;
Accum = 0;
while(1) {
c = *p;
if((c >= L'0') && (c <= HighestDigitAllowed)) {
v = c - L'0';
} else {
c = SpToUpper(c);
if((c >= L'A') && (c <= HighestLetterAllowed)) {
v = c - L'A' + 10;
} else {
break;
}
}
Accum *= Radix;
Accum += v;
p++;
}
if(EndOfValue) {
*EndOfValue = p;
}
return(Negative ? (0-Accum) : Accum);
}
PWSTR
SpAsrHexStringToUChar (
IN PWSTR String,
OUT unsigned char * Number
)
/*++
Routine Description:
This routine converts the hex representation of a number into an
unsigned char. The hex representation is assumed to be a full
two characters long.
Arguments:
String - Supplies the hex representation of the number.
Number - Returns the number converted from hex representation.
Return Value:
A pointer to the end of the hex representation is returned if the
hex representation was successfully converted to an unsigned char.
Otherwise, zero is returned, indicating that an error occured.
--*/
{
WCHAR Result;
int Count;
Result = 0;
for (Count = 0; Count < 2; Count++, String++) {
if ((*String >= L'0') && (*String <= L'9')) {
Result = (Result << 4) + *String - L'0';
}
else if ((*String >= L'A') && (*String <= L'F')) {
Result = (Result << 4) + *String - L'A' + 10;
}
else if ((*String >= L'a') && (*String <= L'f')) {
Result = (Result << 4) + *String - L'a' + 10;
}
}
*Number = (unsigned char)Result;
return String;
}
VOID
SpAsrGuidFromString(
IN OUT GUID* Guid,
IN PWSTR GuidString
)
/*++
Routine Description:
Gets a GUID from a string
Arguments:
Guid - The GUID that holds string representation
Buffer - The string version of the guid, in the form
"%x-%x-%x-%x%x%x%x%x%x%x%x"
Return Value:
Returns the converted string version of the given GUID
--*/
{
PWSTR Buffer = GuidString;
int i = 0;
if (Guid) {
ZeroMemory(Guid, sizeof(GUID));
}
if (Guid && Buffer) {
Guid->Data1 = SpAsrStringToULong(Buffer, NULL, 16);
Buffer += 9;
Guid->Data2 = SpAsrStringToUShort(Buffer, NULL, 16);
Buffer += 5;
Guid->Data3 = SpAsrStringToUShort(Buffer, NULL, 16);
Buffer += 5;
Buffer = SpAsrHexStringToUChar(Buffer,&(Guid->Data4[0]));
Buffer = SpAsrHexStringToUChar(Buffer,&(Guid->Data4[1]));
++Buffer;
Buffer = SpAsrHexStringToUChar(Buffer,&(Guid->Data4[2]));
Buffer = SpAsrHexStringToUChar(Buffer,&(Guid->Data4[3]));
Buffer = SpAsrHexStringToUChar(Buffer,&(Guid->Data4[4]));
Buffer = SpAsrHexStringToUChar(Buffer,&(Guid->Data4[5]));
Buffer = SpAsrHexStringToUChar(Buffer,&(Guid->Data4[6]));
Buffer = SpAsrHexStringToUChar(Buffer,&(Guid->Data4[7]));
}
}
BOOLEAN
SpAsrIsZeroGuid(
IN GUID * Guid
)
{
GUID ZeroGuid;
ZeroMemory(&ZeroGuid, sizeof(GUID));
if (!memcmp(&ZeroGuid, Guid, sizeof(GUID))) {
return TRUE;
}
return FALSE;
}