rtlstr.c

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/*
 * PROJECT:         ReactOS win32k.sys
 * FILE:            win32ss/user/ntuser/misc/rtlstr.c
 * PURPOSE:         Large Strings
 * PROGRAMMER:
 *
 */
 
/* INCLUDES ******************************************************************/
 
#include <win32k.h>
 
/* FUNCTIONS *****************************************************************/
 
VOID
NTAPI
RtlInitLargeAnsiString(
    IN OUT PLARGE_ANSI_STRING DestinationString,
    IN PCSZ SourceString,
    IN INT Unknown)
{
    USHORT DestSize;
 
    if (SourceString)
    {
        DestSize = (USHORT)strlen(SourceString);
        DestinationString->Length = DestSize;
        DestinationString->MaximumLength = DestSize + sizeof(CHAR);
    }
    else
    {
        DestinationString->Length = 0;
        DestinationString->MaximumLength = 0;
    }
 
    DestinationString->Buffer = (PCHAR)SourceString;
    DestinationString->bAnsi  = TRUE;
}
 
VOID
NTAPI
RtlInitLargeUnicodeString(
    IN OUT PLARGE_UNICODE_STRING DestinationString,
    IN PCWSTR SourceString,
    IN INT Unknown)
{
    USHORT DestSize;
 
    if (SourceString)
    {
        DestSize = (USHORT)wcslen(SourceString) * sizeof(WCHAR);
        DestinationString->Length = DestSize;
        DestinationString->MaximumLength = DestSize + sizeof(WCHAR);
    }
    else
    {
        DestinationString->Length = 0;
        DestinationString->MaximumLength = 0;
    }
 
    DestinationString->Buffer = (PWSTR)SourceString;
    DestinationString->bAnsi  = FALSE;
}
 
BOOL
NTAPI
RtlLargeStringToUnicodeString(
    PUNICODE_STRING DestinationString,
    PLARGE_STRING SourceString)
{
    ANSI_STRING AnsiString;
 
    /* Check parameters */
    if (!DestinationString || !SourceString) return FALSE;
 
    /* Check if size if ok */
    // We can't do this atm and truncate the string instead.
    //if (SourceString->Length > 0xffff) return FALSE;
 
    RtlInitUnicodeString(DestinationString, NULL);
 
    if (SourceString->bAnsi)
    {
        RtlInitAnsiString(&AnsiString, (LPSTR)SourceString->Buffer);
        return NT_SUCCESS(RtlAnsiStringToUnicodeString(DestinationString, &AnsiString, TRUE));
    }
    else
    {
        return RtlCreateUnicodeString(DestinationString, SourceString->Buffer);
    }
}