/*++
Copyright (c) 1990 Microsoft Corporation
Module Name:
string.c
Abstract:
This module implements the string routines needed for the NT redirector
Author:
Colin Watson (ColinW) 02-Apr-1993
Revision History:
14-Jun-1990 LarryO
Created for Lanman Redirector
02-Apr-1993 ColinW
Modified for NwRdr
--*/
#include "Procs.h"
#ifdef ALLOC_PRAGMA
#pragma alloc_text( PAGE, DuplicateStringWithString )
#pragma alloc_text( PAGE, DuplicateUnicodeStringWithString )
#pragma alloc_text( PAGE, SetUnicodeString )
#pragma alloc_text( PAGE, MergeStrings )
#endif
NTSTATUS
DuplicateStringWithString (
OUT PSTRING DestinationString,
IN PSTRING SourceString,
IN POOL_TYPE PoolType
)
/*++
Routine Description:
This routine duplicates a supplied input string, storing the result
of the duplication in the supplied string. The maximumlength of the
new string is determined by the length of the SourceString.
Arguments:
OUT PSTRING DestinationString - Returns the filled in string.
IN PSTRING SourceString - Supplies the string to duplicate
IN POOLTYPE PoolType - Supplies the type of pool (PagedPool or
NonPagedPool)
Return Value:
NTSTATUS - Status of resulting operation
If !NT_SUCCESS then DestinationString->Buffer == NULL
--*/
{
PAGED_CODE();
DestinationString->Buffer = NULL;
try {
if (SourceString->Length != 0) {
//
// Allocate pool to hold the buffer (contents of the string)
//
DestinationString->Buffer = (PSZ )ALLOCATE_POOL(PoolType,
SourceString->Length);
}
} except (EXCEPTION_EXECUTE_HANDLER) {
return GetExceptionCode();
}
if (DestinationString->Buffer == NULL && SourceString->Length != 0) {
//
// The allocation failed, return failure.
//
return STATUS_INSUFFICIENT_RESOURCES;
}
DestinationString->MaximumLength = SourceString->Length;
//
// Copy the source string into the newly allocated
// destination string
//
RtlCopyString(DestinationString, SourceString);
return STATUS_SUCCESS;
}
NTSTATUS
DuplicateUnicodeStringWithString (
OUT PUNICODE_STRING DestinationString,
IN PUNICODE_STRING SourceString,
IN POOL_TYPE PoolType
)
/*++
Routine Description:
This routine duplicates a supplied input string, storing the result
of the duplication in the supplied string. The maximumlength of the
new string is determined by the length of the SourceString.
Arguments:
OUT PSTRING DestinationString - Returns the filled in string.
IN PSTRING SourceString - Supplies the string to duplicate
IN POOLTYPE PoolType - Supplies the type of pool (PagedPool or
NonPagedPool)
Return Value:
NTSTATUS - Status of resulting operation
If !NT_SUCCESS then DestinationString->Buffer == NULL
--*/
{
PAGED_CODE();
DestinationString->Buffer = NULL;
try {
if (SourceString->Length != 0) {
//
// Allocate pool to hold the buffer (contents of the string)
//
DestinationString->Buffer = (WCHAR *)ALLOCATE_POOL(PoolType,
SourceString->Length);
}
} except (EXCEPTION_EXECUTE_HANDLER) {
return GetExceptionCode();
}
if (DestinationString->Buffer == NULL && SourceString->Length != 0) {
//
// The allocation failed, return failure.
//
return STATUS_INSUFFICIENT_RESOURCES;
}
DestinationString->MaximumLength = SourceString->Length;
//
// Copy the source string into the newly allocated
// destination string
//
RtlCopyUnicodeString(DestinationString, SourceString);
return STATUS_SUCCESS;
}
#if 0
VOID
CopyUnicodeStringToUnicode (
OUT PVOID *Destination,
IN PUNICODE_STRING Source,
IN BOOLEAN AdjustPointer
)
/*++
Routine Description:
This routine copies the specified source string onto the destination
asciiz string.
Arguments:
OUT PUCHAR Destination, - Supplies a pointer to the destination
buffer for the string.
IN PSTRING String - Supplies the source string.
IN BOOLEAN AdjustPointer - If TRUE, increment destination pointer
Return Value:
None.
--*/
{
PAGED_CODE();
RtlCopyMemory((*Destination), (Source)->Buffer, (Source)->Length);
if (AdjustPointer) {
((PCHAR)(*Destination)) += ((Source)->Length);
}
}
NTSTATUS
CopyUnicodeStringToAscii (
OUT PUCHAR *Destination,
IN PUNICODE_STRING Source,
IN BOOLEAN AdjustPointer,
IN USHORT MaxLength
)
/*++
Routine Description:
This routine copies the specified source string onto the destination
asciiz string.
Arguments:
OUT PUCHAR Destination, - Supplies the destination asciiz string.
IN PUNICODE_STRING String - Supplies the source string.
IN BOOLEAN AdjustPointer - If TRUE, increment destination pointer
Return Value:
Status of conversion.
--*/
{
ANSI_STRING DestinationString;
NTSTATUS Status;
PAGED_CODE();
DestinationString.Buffer = (*Destination);
DestinationString.MaximumLength = (USHORT)(MaxLength);
Status = RtlUnicodeStringToOemString(&DestinationString, (Source), FALSE);
if (!NT_SUCCESS(Status)) {
return Status;
}
if (AdjustPointer) {
(*Destination) += DestinationString.Length;
}
return STATUS_SUCCESS;
}
#endif
NTSTATUS
SetUnicodeString (
IN PUNICODE_STRING Destination,
IN ULONG Length,
IN PWCHAR Source
)
/*++
Routine Description:
This routine copies the specified source string onto the destination
UNICODE string allocating the buffer.
Arguments:
Return Value:
Status of conversion.
--*/
{
UNICODE_STRING Temp;
PAGED_CODE();
Destination->Buffer = NULL;
Destination->Length = 0;
Destination->MaximumLength = 0;
if (Length == 0) {
return STATUS_SUCCESS;
}
Temp.MaximumLength =
Temp.Length = (USHORT )Length;
Temp.Buffer = Source;
Destination->Buffer =
ALLOCATE_POOL(NonPagedPool,
Temp.MaximumLength+sizeof(WCHAR));
if (Destination->Buffer == NULL) {
Error(EVENT_NWRDR_RESOURCE_SHORTAGE, STATUS_INSUFFICIENT_RESOURCES, NULL, 0, 0);
return STATUS_INSUFFICIENT_RESOURCES;
}
Destination->MaximumLength = (USHORT)Length;
RtlCopyUnicodeString(Destination, &Temp);
Destination->Buffer[(Destination->Length/sizeof(WCHAR))] = UNICODE_NULL;
return STATUS_SUCCESS;
}
VOID
MergeStrings(
IN PUNICODE_STRING Destination,
IN PUNICODE_STRING S1,
IN PUNICODE_STRING S2,
IN ULONG Type
)
/*++
Routine Description:
This routine Allocates space for Destination.Buffer and copies S1 followed
by S2 into the buffer.
Raises status if couldn't allocate buffer
Arguments:
IN PUNICODE_STRING Destination,
IN PUNICODE_STRING S1,
IN PUNICODE_STRING S2,
IN ULONG Type - PagedPool or NonPagedPool
Return Value:
None.
--*/
{
PAGED_CODE();
Destination->MaximumLength = S1->Length + S2->Length;
Destination->Length = S1->Length + S2->Length;
Destination->Buffer = ALLOCATE_POOL_EX( Type, Destination->MaximumLength );
RtlCopyMemory( Destination->Buffer,
S1->Buffer,
S1->Length);
RtlCopyMemory( (PUCHAR)Destination->Buffer + S1->Length,
S2->Buffer,
S2->Length);
return;
}
