subsystems/win32/win32k/misc/rtlstr.c

   1 /*
   2  * PROJECT:         ReactOS win32k.sys
   3  * FILE:            subsystems/win32/win32k/misc/rtlstr.c
   4  * PURPOSE:         Large Strings
   5  * PROGRAMMER:
   6  * UPDATE HISTORY:
   7  *
   8  */
   9
  10 /* INCLUDES ******************************************************************/
  11
  12 #include <win32k.h>
  13
  14 /* FUNCTIONS *****************************************************************/
  15 VOID
  16 NTAPI
  17 RtlInitLargeAnsiString(IN OUT PLARGE_ANSI_STRING DestinationString,
  18                        IN PCSZ SourceString,
  19                        IN INT Unknown)
  20 {
  21     ULONG DestSize;
  22
  23     if (SourceString)
  24     {
  25         DestSize = strlen(SourceString);
  26         DestinationString->Length = DestSize;
  27         DestinationString->MaximumLength = DestSize + sizeof(CHAR);
  28     }
  29     else
  30     {
  31         DestinationString->Length = 0;
  32         DestinationString->MaximumLength = 0;
  33     }
  34
  35     DestinationString->Buffer = (PCHAR)SourceString;
  36     DestinationString->bAnsi  = TRUE;
  37 }
  38
  39 VOID
  40 NTAPI
  41 RtlInitLargeUnicodeString(IN OUT PLARGE_UNICODE_STRING DestinationString,
  42                           IN PCWSTR SourceString,
  43                           IN INT Unknown)
  44 {
  45     ULONG DestSize;
  46
  47     if (SourceString)
  48     {
  49         DestSize = wcslen(SourceString) * sizeof(WCHAR);
  50         DestinationString->Length = DestSize;
  51         DestinationString->MaximumLength = DestSize + sizeof(WCHAR);
  52     }
  53     else
  54     {
  55         DestinationString->Length = 0;
  56         DestinationString->MaximumLength = 0;
  57     }
  58
  59     DestinationString->Buffer = (PWSTR)SourceString;
  60     DestinationString->bAnsi  = FALSE;
  61 }
  62
  63 BOOL
  64 NTAPI
  65 RtlLargeStringToUnicodeString( PUNICODE_STRING DestinationString,
  66                                PLARGE_STRING SourceString)
  67 {
  68   ANSI_STRING AnsiString;
  69
  70   RtlInitUnicodeString(DestinationString, NULL);
  71   if (DestinationString && SourceString && SourceString->bAnsi)
  72   {
  73      RtlInitAnsiString(&AnsiString, (LPSTR)SourceString->Buffer);
  74      return NT_SUCCESS(RtlAnsiStringToUnicodeString(DestinationString, &AnsiString, TRUE));
  75   }
  76   else if (DestinationString && SourceString)
  77   {
  78      return RtlCreateUnicodeString(DestinationString, SourceString->Buffer);
  79   }
  80   else
  81      return FALSE;
  82 }