reactos/ntoskrnl/rtl/nls.c

   1 /* $Id: nls.c,v 1.23 2004/05/31 19:40:49 gdalsnes Exp $
   2  *
   3  * COPYRIGHT:       See COPYING in the top level directory
   4  * PROJECT:         ReactOS kernel
   5  * FILE:            ntoskrnl/rtl/nls.c
   6  * PURPOSE:         Bitmap functions
   7  * UPDATE HISTORY:
   8  *                  20/08/99 Created by Eric Kohl
   9  */
  10
  11 #include <ddk/ntddk.h>
  12
  13 #include <internal/mm.h>
  14 #include <internal/nls.h>
  15
  16 #define NDEBUG
  17 #include <internal/debug.h>
  18
  19
  20 /* GLOBALS *******************************************************************/
  21
  22
  23 static PUSHORT NlsAnsiCodePageTable = NULL;
  24 static ULONG NlsAnsiCodePageTableSize = 0;
  25
  26 static PUSHORT NlsOemCodePageTable = NULL;
  27 static ULONG NlsOemCodePageTableSize = 0;
  28
  29 static PUSHORT NlsUnicodeCasemapTable = NULL;
  30 static ULONG NlsUnicodeCasemapTableSize = 0;
  31
  32 PVOID NlsSectionObject = NULL;
  33 static PVOID NlsSectionBase = NULL;
  34 static ULONG NlsSectionViewSize = 0;
  35
  36 ULONG NlsAnsiTableOffset = 0;
  37 ULONG NlsOemTableOffset = 0;
  38 ULONG NlsUnicodeTableOffset = 0;
  39
  40
  41 /* FUNCTIONS *****************************************************************/
  42
  43
  44
  45 VOID INIT_FUNCTION
  46 RtlpImportAnsiCodePage(PUSHORT TableBase,
  47              ULONG Size)
  48 {
  49   NlsAnsiCodePageTable = TableBase;
  50   NlsAnsiCodePageTableSize = Size;
  51 }
  52
  53
  54 VOID INIT_FUNCTION
  55 RtlpImportOemCodePage(PUSHORT TableBase,
  56             ULONG Size)
  57 {
  58   NlsOemCodePageTable = TableBase;
  59   NlsOemCodePageTableSize = Size;
  60 }
  61
  62
  63 VOID INIT_FUNCTION
  64 RtlpImportUnicodeCasemap(PUSHORT TableBase,
  65           ULONG Size)
  66 {
  67   NlsUnicodeCasemapTable = TableBase;
  68   NlsUnicodeCasemapTableSize = Size;
  69 }
  70
  71
  72 VOID INIT_FUNCTION
  73 RtlpCreateInitialNlsTables(VOID)
  74 {
  75   NLSTABLEINFO NlsTable;
  76
  77   if (NlsAnsiCodePageTable == NULL || NlsAnsiCodePageTableSize == 0 ||
  78       NlsOemCodePageTable == NULL || NlsOemCodePageTableSize == 0 ||
  79       NlsUnicodeCasemapTable == NULL || NlsUnicodeCasemapTableSize == 0)
  80     {
  81       KEBUGCHECKEX (0x32, STATUS_UNSUCCESSFUL, 1, 0, 0);
  82     }
  83
  84   RtlInitNlsTables (NlsAnsiCodePageTable,
  85           NlsOemCodePageTable,
  86           NlsUnicodeCasemapTable,
  87           &NlsTable);
  88
  89   RtlResetRtlTranslations (&NlsTable);
  90 }
  91
  92
  93 VOID INIT_FUNCTION
  94 RtlpCreateNlsSection(VOID)
  95 {
  96   NLSTABLEINFO NlsTable;
  97   LARGE_INTEGER SectionSize;
  98   HANDLE SectionHandle;
  99   NTSTATUS Status;
 100
 101   DPRINT("RtlpCreateNlsSection() called\n");
 102
 103   NlsSectionViewSize = ROUND_UP(NlsAnsiCodePageTableSize, PAGE_SIZE) +
 104              ROUND_UP(NlsOemCodePageTableSize, PAGE_SIZE) +
 105              ROUND_UP(NlsUnicodeCasemapTableSize, PAGE_SIZE);
 106
 107   DPRINT("NlsSectionViewSize %lx\n", NlsSectionViewSize);
 108
 109   SectionSize.QuadPart = (LONGLONG)NlsSectionViewSize;
 110   Status = NtCreateSection(&SectionHandle,
 111             SECTION_ALL_ACCESS,
 112             NULL,
 113             &SectionSize,
 114             PAGE_READWRITE,
 115             SEC_COMMIT,
 116             NULL);
 117   if (!NT_SUCCESS(Status))
 118     {
 119       DPRINT1("NtCreateSection() failed\n");
 120       KEBUGCHECKEX(0x32, Status, 1, 1, 0);
 121     }
 122
 123   Status = ObReferenceObjectByHandle(SectionHandle,
 124                  SECTION_ALL_ACCESS,
 125                  MmSectionObjectType,
 126                  KernelMode,
 127                  &NlsSectionObject,
 128                  NULL);
 129   NtClose(SectionHandle);
 130   if (!NT_SUCCESS(Status))
 131     {
 132       DPRINT1("ObReferenceObjectByHandle() failed\n");
 133       KEBUGCHECKEX(0x32, Status, 1, 2, 0);
 134     }
 135
 136   Status = MmMapViewInSystemSpace(NlsSectionObject,
 137               &NlsSectionBase,
 138               &NlsSectionViewSize);
 139   if (!NT_SUCCESS(Status))
 140     {
 141       DPRINT1("MmMapViewInSystemSpace() failed\n");
 142       KEBUGCHECKEX(0x32, Status, 1, 3, 0);
 143     }
 144
 145   DPRINT("NlsSection: Base %p  Size %lx\n",
 146     NlsSectionBase,
 147     NlsSectionViewSize);
 148
 149   NlsAnsiTableOffset = 0;
 150   RtlCopyMemory((PVOID)((ULONG)NlsSectionBase + NlsAnsiTableOffset),
 151       NlsAnsiCodePageTable,
 152       NlsAnsiCodePageTableSize);
 153
 154   NlsOemTableOffset = NlsAnsiTableOffset + ROUND_UP(NlsAnsiCodePageTableSize, PAGE_SIZE);
 155   RtlCopyMemory((PVOID)((ULONG)NlsSectionBase + NlsOemTableOffset),
 156       NlsOemCodePageTable,
 157       NlsOemCodePageTableSize);
 158
 159   NlsUnicodeTableOffset = NlsOemTableOffset + ROUND_UP(NlsOemCodePageTableSize, PAGE_SIZE);
 160   RtlCopyMemory((PVOID)((ULONG)NlsSectionBase + NlsUnicodeTableOffset),
 161       NlsUnicodeCasemapTable,
 162       NlsUnicodeCasemapTableSize);
 163
 164   RtlInitNlsTables ((PVOID)((ULONG)NlsSectionBase + NlsAnsiTableOffset),
 165           (PVOID)((ULONG)NlsSectionBase + NlsOemTableOffset),
 166           (PVOID)((ULONG)NlsSectionBase + NlsUnicodeTableOffset),
 167           &NlsTable);
 168
 169   RtlResetRtlTranslations (&NlsTable);
 170 }