From 314012cad9b217ae9548c0dd1dbdfe22ef4efc28 Mon Sep 17 00:00:00 2001
From: Aiken Harris <harraiken91@gmail.com>
Date: Fri, 26 Jun 2026 19:24:22 +0200
Subject: [PATCH] Add National Language Support table definitions

---
 sdk/xtdk/rtltypes.h | 29 +++++++++++++++++++++++++++++
 sdk/xtdk/xtstruct.h |  2 ++
 2 files changed, 31 insertions(+)

diff --git a/sdk/xtdk/rtltypes.h b/sdk/xtdk/rtltypes.h
index b0aa9d8..7f1f96a 100644
--- a/sdk/xtdk/rtltypes.h
+++ b/sdk/xtdk/rtltypes.h
@@ -32,6 +32,9 @@
 #define DOUBLE_SCIENTIFIC_PRECISION                     -4
 #define DOUBLE_SIGN_BIT                                 0x8000000000000000ULL
 
+/* Maximum number of lead bytes for NLS */
+#define NLS_MAXIMUM_LEADBYTES                           12
+
 /* Print flag definitions */
 #define PFL_ALWAYS_PRINT_SIGN                           0x00000001
 #define PFL_SPACE_FOR_PLUS                              0x00000002
@@ -72,6 +75,23 @@
 typedef XTSTATUS (*PWRITE_CHARACTER)(IN CHAR Character);
 typedef XTSTATUS (*PWRITE_WIDE_CHARACTER)(IN WCHAR Character);
 
+/* Code page table structure definition */
+typedef struct _CPTABLE_INFO
+{
+    USHORT CodePage;
+    USHORT MaximumCharacterSize;
+    USHORT DefaultChar;
+    USHORT UniDefaultChar;
+    USHORT TransDefaultChar;
+    USHORT TransUniDefaultChar;
+    USHORT DBCSCodePage;
+    UCHAR LeadByte[NLS_MAXIMUM_LEADBYTES];
+    PUSHORT MultiByteTable;
+    PVOID WideCharTable;
+    PUSHORT DBCSRanges;
+    PUSHORT DBCSOffsets;
+} CPTABLE_INFO, *PCPTABLE_INFO;
+
 /* 128-bit buffer containing a unique identifier value */
 typedef struct _GUID
 {
@@ -95,6 +115,15 @@ typedef struct _LIST_ENTRY64
     ULONGLONG Blink;
 } LIST_ENTRY64, *PLIST_ENTRY64;
 
+/* NLS table structure definition */
+typedef struct _NLSTABLE_INFO
+{
+    CPTABLE_INFO OemTableInfo;
+    CPTABLE_INFO AnsiTableInfo;
+    PUSHORT UpperCaseTable;
+    PUSHORT LowerCaseTable;
+} NLSTABLE_INFO, *PNLSTABLE_INFO;
+
 /* Red-black tree node color enumeration list */
 typedef enum _RTL_BALANCED_NODE_COLOR
 {
diff --git a/sdk/xtdk/xtstruct.h b/sdk/xtdk/xtstruct.h
index 4e21fd8..c74e9e4 100644
--- a/sdk/xtdk/xtstruct.h
+++ b/sdk/xtdk/xtstruct.h
@@ -85,6 +85,7 @@ typedef struct _ANSI_STRING ANSI_STRING, *PANSI_STRING;
 typedef struct _ANSI_STRING32 ANSI_STRING32, *PANSI_STRING32;
 typedef struct _ANSI_STRING64 ANSI_STRING64, *PANSI_STRING64;
 typedef struct _CPPORT CPPORT, *PCPPORT;
+typedef struct _CPTABLE_INFO CPTABLE_INFO, *PCPTABLE_INFO;
 typedef const struct _CMMPAGEMAP_ROUTINES CMMPAGEMAP_ROUTINES, *PCMMPAGEMAP_ROUTINES;
 typedef struct _CSTRING CSTRING, *PCSTRING;
 typedef struct _EFI_1394_DEVICE_PATH EFI_1394_DEVICE_PATH, *PEFI_1394_DEVICE_PATH;
@@ -299,6 +300,7 @@ typedef struct _MMFREE_POOL_ENTRY MMFREE_POOL_ENTRY, *PMMFREE_POOL_ENTRY;
 typedef struct _MMMEMORY_LAYOUT MMMEMORY_LAYOUT, *PMMMEMORY_LAYOUT;
 typedef struct _MMPFNENTRY MMPFNENTRY, *PMMPFNENTRY;
 typedef struct _MMPFNLIST MMPFNLIST, *PMMPFNLIST;
+typedef struct _NLSTABLE_INFO NLSTABLE_INFO, *PNLSTABLE_INFO;
 typedef struct _NONPAGED_LOOKASIDE_LIST NONPAGED_LOOKASIDE_LIST, *PNONPAGED_LOOKASIDE_LIST;
 typedef struct _OWNER_ENTRY OWNER_ENTRY, *POWNER_ENTRY;
 typedef struct _PAGED_LOOKASIDE_LIST PAGED_LOOKASIDE_LIST, *PPAGED_LOOKASIDE_LIST;