Add initial NLS support

2026-06-26 23:52:58 +02:00
parent 314012cad9
commit a54c4b48fb
4 changed files with 166 additions and 0 deletions
--- a/xtoskrnl/rtl/nls.cc
+++ b/xtoskrnl/rtl/nls.cc
@@ -0,0 +1,130 @@
+/**
+ * PROJECT:         ExectOS
+ * COPYRIGHT:       See COPYING.md in the top level directory
+ * FILE:            xtoskrnl/rtl/nls.cc
+ * DESCRIPTION:     National Language Support
+ * DEVELOPERS:      Aiken Harris <harraiken91@gmail.com>
+ */
+
+#include <xtos.hh>
+
+
+/**
+ * Retrieves the default ANSI and OEM code page identifiers for the system.
+ *
+ * @param AnsiCodePage
+ *        Receives the default ANSI code page identifier.
+ *
+ * @param OemCodePage
+ *        Receives the default OEM code page identifier.
+ *
+ * @return This routine does not return any value.
+ *
+ * @since XT 1.0
+ */
+XTAPI
+VOID
+RTL::Nls::GetDefaultCodePage(OUT PUSHORT AnsiCodePage,
+                             OUT PUSHORT OemCodePage)
+{
+    /* No NLS support */
+    UNIMPLEMENTED;
+
+    /* Set fallback values to zero */
+    *AnsiCodePage = 0;
+    *OemCodePage = 0;
+}
+
+/**
+ * Initializes a code page table information structure from a raw table base pointer.
+ *
+ * @param TableBase
+ *        Supplies a pointer to the raw code page data.
+ *
+ * @param CodePageTable
+ *        Receives the initialized code page table information structure.
+ *
+ * @return This routine does not return any value.
+ *
+ * @since XT 1.0
+ */
+XTAPI
+VOID
+RTL::Nls::InitializeCodePageTable(IN PUSHORT TableBase,
+                                  OUT PCPTABLE_INFO CodePageTable)
+{
+    /* No NLS support */
+    UNIMPLEMENTED;
+}
+
+/**
+ * Initializes the global NLS table information structure using raw table bases.
+ *
+ * @param AnsiTableBase
+ *        Supplies a pointer to the raw ANSI translation table data.
+ *
+ * @param OemTableBase
+ *        Supplies a pointer to the raw OEM translation table data.
+ *
+ * @param CaseTableBase
+ *        Supplies a pointer to the raw Unicode uppercase/lowercase mapping table data.
+ *
+ * @param NlsTable
+ *        Receives the fully initialized NLS table structure.
+ *
+ * @return This routine does not return any value.
+ *
+ * @since XT 1.0
+ */
+XTAPI
+VOID
+RTL::Nls::InitializeNlsTables(IN PUSHORT AnsiTableBase,
+                              IN PUSHORT OemTableBase,
+                              IN PUSHORT CaseTableBase,
+                              OUT PNLSTABLE_INFO NlsTable)
+{
+    /* No NLS support */
+    UNIMPLEMENTED;
+}
+
+/**
+ * Converts a wide character to its lowercase equivalent using Unicode rules.
+ *
+ * @param WideCharacter
+ *        Supplies the Unicode wide character to convert.
+ *
+ * @return This routine returns the lowercase equivalent of the provided wide character.
+ *
+ * @since XT 1.0
+ */
+XTAPI
+WCHAR
+RTL::Nls::ToLowerUnicodeCharacter(IN WCHAR WideCharacter)
+{
+    /* This is temporary wrapper with no NLS support */
+    UNIMPLEMENTED;
+
+    /* Fall back to the internal wide string character transformation engine */
+    return RTL::WideString::ToLowerWideCharacter(WideCharacter);
+}
+
+/**
+ * Converts a wide character to its uppercase equivalent using Unicode rules.
+ *
+ * @param WideCharacter
+ *        Supplies the Unicode wide character to convert.
+ *
+ * @return This routine returns the uppercase equivalent of the provided wide character.
+ *
+ * @since XT 1.0
+ */
+XTAPI
+WCHAR
+RTL::Nls::ToUpperUnicodeCharacter(IN WCHAR WideCharacter)
+{
+    /* This is temporary wrapper with no NLS support */
+    UNIMPLEMENTED;
+
+    /* Fallback to the internal wide string character transformation engine */
+    return RTL::WideString::ToUpperWideCharacter(WideCharacter);
+}