reactos/win32ss/user/ntuser/misc/rtlstr.c

   1 /*
   2  * PROJECT:         ReactOS win32k.sys
   3  * FILE:            subsystems/win32/win32k/misc/rtlstr.c
   4  * PURPOSE:         Large Strings
   5  * PROGRAMMER:
   6  *
   7  */
   8
   9 /* INCLUDES ******************************************************************/
  10
  11 #include <win32k.h>
  12
  13 /* FUNCTIONS *****************************************************************/
  14
  15 VOID
  16 NTAPI
  17 RtlInitLargeAnsiString(
  18     IN OUT PLARGE_ANSI_STRING DestinationString,
  19     IN PCSZ SourceString,
  20     IN INT Unknown)
  21 {
  22     USHORT DestSize;
  23
  24     if (SourceString)
  25     {
  26         DestSize = (USHORT)strlen(SourceString);
  27         DestinationString->Length = DestSize;
  28         DestinationString->MaximumLength = DestSize + sizeof(CHAR);
  29     }
  30     else
  31     {
  32         DestinationString->Length = 0;
  33         DestinationString->MaximumLength = 0;
  34     }
  35
  36     DestinationString->Buffer = (PCHAR)SourceString;
  37     DestinationString->bAnsi  = TRUE;
  38 }
  39
  40 VOID
  41 NTAPI
  42 RtlInitLargeUnicodeString(
  43     IN OUT PLARGE_UNICODE_STRING DestinationString,
  44     IN PCWSTR SourceString,
  45     IN INT Unknown)
  46 {
  47     USHORT DestSize;
  48
  49     if (SourceString)
  50     {
  51         DestSize = (USHORT)wcslen(SourceString) * sizeof(WCHAR);
  52         DestinationString->Length = DestSize;
  53         DestinationString->MaximumLength = DestSize + sizeof(WCHAR);
  54     }
  55     else
  56     {
  57         DestinationString->Length = 0;
  58         DestinationString->MaximumLength = 0;
  59     }
  60
  61     DestinationString->Buffer = (PWSTR)SourceString;
  62     DestinationString->bAnsi  = FALSE;
  63 }
  64
  65 BOOL
  66 NTAPI
  67 RtlLargeStringToUnicodeString(
  68     PUNICODE_STRING DestinationString,
  69     PLARGE_STRING SourceString)
  70 {
  71     ANSI_STRING AnsiString;
  72
  73     /* Check parameters */
  74     if (!DestinationString || !SourceString) return FALSE;
  75
  76     /* Check if size if ok */
  77     // We can't do this atm and truncate the string instead.
  78     //if (SourceString->Length > 0xffff) return FALSE;
  79
  80     RtlInitUnicodeString(DestinationString, NULL);
  81
  82     if (SourceString->bAnsi)
  83     {
  84         RtlInitAnsiString(&AnsiString, (LPSTR)SourceString->Buffer);
  85         return NT_SUCCESS(RtlAnsiStringToUnicodeString(DestinationString, &AnsiString, TRUE));
  86     }
  87     else
  88     {
  89         return RtlCreateUnicodeString(DestinationString, SourceString->Buffer);
  90     }
  91 }
  92