mirror of
https://github.com/reactos/reactos.git
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67 lines
2 KiB
C
67 lines
2 KiB
C
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/*
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* PROJECT: ReactOS Floppy Disk Controller Driver
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* LICENSE: GNU GPLv2 only as published by the Free Software Foundation
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* FILE: drivers/storage/fdc/fdc/misc.c
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* PURPOSE: Misc Routines
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* PROGRAMMERS: Eric Kohl
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*/
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/* INCLUDES *******************************************************************/
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#include "fdc.h"
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#define NDEBUG
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#include <debug.h>
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/* FUNCTIONS ******************************************************************/
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NTSTATUS
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DuplicateUnicodeString(
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IN ULONG Flags,
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IN PCUNICODE_STRING SourceString,
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OUT PUNICODE_STRING DestinationString)
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{
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USHORT DestMaxLength;
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if (SourceString == NULL ||
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DestinationString == NULL ||
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SourceString->Length > SourceString->MaximumLength ||
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(SourceString->Length == 0 && SourceString->MaximumLength > 0 && SourceString->Buffer == NULL) ||
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Flags == RTL_DUPLICATE_UNICODE_STRING_ALLOCATE_NULL_STRING ||
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Flags >= 4)
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{
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return STATUS_INVALID_PARAMETER;
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}
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if ((SourceString->Length == 0) &&
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(Flags != (RTL_DUPLICATE_UNICODE_STRING_NULL_TERMINATE |
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RTL_DUPLICATE_UNICODE_STRING_ALLOCATE_NULL_STRING)))
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{
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DestinationString->Length = 0;
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DestinationString->MaximumLength = 0;
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DestinationString->Buffer = NULL;
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}
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else
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{
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DestMaxLength = SourceString->Length;
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if (Flags & RTL_DUPLICATE_UNICODE_STRING_NULL_TERMINATE)
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DestMaxLength += sizeof(UNICODE_NULL);
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DestinationString->Buffer = ExAllocatePoolWithTag(PagedPool, DestMaxLength, FDC_TAG);
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if (DestinationString->Buffer == NULL)
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return STATUS_NO_MEMORY;
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RtlCopyMemory(DestinationString->Buffer, SourceString->Buffer, SourceString->Length);
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DestinationString->Length = SourceString->Length;
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DestinationString->MaximumLength = DestMaxLength;
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if (Flags & RTL_DUPLICATE_UNICODE_STRING_NULL_TERMINATE)
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DestinationString->Buffer[DestinationString->Length / sizeof(WCHAR)] = 0;
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}
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return STATUS_SUCCESS;
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}
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/* EOF */
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