core: import NSS Macintosh codepage name helper into libnwcore

AI.md

@@ -1,9 +1,9 @@
 # AI working notes for mars-nwe
 
-## Current handoff status after NSS low-level imports 0404-0416
+## Current handoff status after NSS low-level imports 0404-0417
 
 Current accepted MARS-NWE server line in this work session includes the NSS
-low-level libnwcore imports through `0416`:
+low-level libnwcore imports through `0417`:
 
 - `0404` imports NSS `bitmap.c` directly as `src/core/bitmap.c`.
 - `0405` moves the imported bitmap/NSS base headers directly into
@@ -63,6 +63,13 @@ low-level libnwcore imports through `0416`:
   introduced; any future table data still belongs in the external
   `mars-unicode-tables` submodule.
 
+- `0417` imports NSS `getMacCodePageName.c` and fills out the remaining
+  lightweight Unicode init symbols (`LB_UnicodeStartup()`,
+  `LB_UnicodeShutdown()`, `MacintoshCodePageName`) needed by imported NSS
+  converter entry points.  The Macintosh codepage name stays NULL until the
+  real codepage table/runtime layer is imported, so no new Unicode/codepage
+  tables are introduced in this patch.
+
 Keep future NSS low-level imports directly under `src/core/<original>.c` and
 `include/core/<original>.h`.  Do not add a new `nwcore/nss/` or
 `src/core/nss/` path for the active libnwcore imports.

src/core/CMakeLists.txt

@@ -104,6 +104,7 @@ set(NWCORE_IMPORTED_NSS_SOURCES
     bitmap.c
     bit.c
     crc.c
+    getMacCodePageName.c
     getNssUnicodeVersion.c
     hash.c
     componentUnicpy.c

src/core/getMacCodePageName.c

@@ -0,0 +1,95 @@
+/****************************************************************************
+ |
+ |	(C) Copyright 1985, 1991, 1993, 1996 Novell, Inc.
+ |	All Rights Reserved.
+ |
+ |	This program is free software; you can redistribute it and/or
+ |	modify it under the terms of version 2 of the GNU General Public
+ |	License as published by the Free Software Foundation.
+ |
+ |	This program is distributed in the hope that it will be useful,
+ |	but WITHOUT ANY WARRANTY; without even the implied warranty of
+ |	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ |	GNU General Public License for more details.
+ |
+ |	You should have received a copy of the GNU General Public License
+ |	along with this program; if not, contact Novell, Inc.
+ |
+ |	To contact Novell about this file by physical or electronic mail,
+ |	you may find current contact information at www.novell.com
+ |
+ |***************************************************************************
+ |
+ |	 NetWare Advance File Services (NSS) module
+ |
+ |---------------------------------------------------------------------------
+ |
+ | $Author: taysom $
+ | $Date: 2004-12-31 01:10:58 +0530 (Fri, 31 Dec 2004) $
+ |
+ | $RCSfile$
+ | $Revision: 465 $
+ |
+ |---------------------------------------------------------------------------
+ |	This module is used to:
+ |		Routine to convert ascii to unicode_t
+ |
+ | 9/14/01:  Instead of calling system routines for unicode conversion, NSS
+ | has created is own set of conversion functions that are MP safe and fast.
++-------------------------------------------------------------------------*/
+#if zLINUX
+#include "nssOSAPIs.h"
+#endif
+#include <unicodeInit.h>
+#include <zOmni.h>
+#include <xError.h>
+#include <string.h>
+#if zNETWARE
+#include "nssOSAPIs.h"
+#endif
+
+
+/**************************************************************************
+ *
+ *	This returns the ASCII name of the current Macintosh Code Page.
+ *
+ *	Return Codes:
+ *		zOK - The codepage name is returned in the buffer.
+ *		zERR_NO_FILES_FOUND - The codepage name is empty or not initialized.
+ *		zERR_BUFFER_TOO_SMALL - the buffer provided by the caller is not
+ *			big enough to contain the code page name.
+ *
+ ***************************************************************************/
+STATUS LB_GetMacCodePageName(
+	BYTE *nameBuffer,				/* Buffer into which the name will be put*/
+	NINT bufferLen)					/* Length of the buffer */
+{
+	NINT nameLen;
+
+	if (MacintoshCodePageName == NULL)
+	{
+		/* This is a silly error to return, but it implies that we did not
+		 * fine a name for the Macintosh code page.  That is all that is needed.
+		 */
+		return(zERR_NO_FILES_FOUND);
+	}
+
+	nameLen = strlen(MacintoshCodePageName);
+	if (nameLen == 0)
+	{
+		/* This is a silly error to return, but it implies that we did not
+		 * fine a name for the Macintosh code page.  That is all that is needed.
+		 */
+		return(zERR_NO_FILES_FOUND);
+	}
+	else if (nameLen > (bufferLen-1))
+	{
+		/* Not enough room in the caller's buffer to receive the name. */
+		return(zERR_BUFFER_TOO_SMALL);
+	}
+	else
+	{
+		strcpy(nameBuffer, MacintoshCodePageName);
+	}
+	return zOK;
+}

src/core/unicodeInit.c

@@ -23,6 +23,7 @@
  |  MARS-NWE libnwcore Unicode case table bootstrap.
  +-------------------------------------------------------------------------*/
 #include <xUnicode.h>
+#include <xError.h>
 
 /*
  * NSS stores the Unicode translation of byte 0xff in these globals for
@@ -34,6 +35,15 @@
 unicode_t NSSUnicodeFF = ASCII_WILDCARD_BREAK;
 unicode_t NSSUnicodeMacFF = ASCII_WILDCARD_BREAK;
 
+/*
+ * Full NSS Unicode startup also tracks the active Macintosh codepage name.
+ * Keep the exported storage so LB_GetMacCodePageName() and future converter
+ * imports link; the value remains NULL until codepage tables/runtime are
+ * imported from the external unicode table source.
+ */
+BYTE *MacintoshCodePageName = NULL;
+
+
 /*
  * NSS normally fills NSSUniToLower[]/NSSUniToUpper[] during
  * LB_UnicodeStartup() in public_core/library/unicode/unicodeInit.c via the
@@ -45,6 +55,16 @@ unicode_t NSSUnicodeMacFF = ASCII_WILDCARD_BREAK;
  * statically initialized by TAB/unicodeTables.c and therefore need no runtime
  * fill step here.
  */
+STATUS LB_UnicodeStartup(void)
+{
+	LB_UnicodeCaseStartup();
+	return zOK;
+}
+
+void LB_UnicodeShutdown(void)
+{
+}
+
 void LB_UnicodeCaseStartup(void)
 {
 }