patch-2.4.20 linux-2.4.20/fs/jfs/jfs_unicode.c

• Lines: 111
• Date: Thu Nov 28 15:53:15 2002
• Orig file: linux-2.4.19/fs/jfs/jfs_unicode.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -urN linux-2.4.19/fs/jfs/jfs_unicode.c linux-2.4.20/fs/jfs/jfs_unicode.c
@@ -0,0 +1,110 @@
+/*
+ *   Copyright (c) International Business Machines Corp., 2000-2002
+ *
+ *   This program is free software;  you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation; either version 2 of the License, or 
+ *   (at your option) any later version.
+ * 
+ *   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, write to the Free Software 
+ *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include <linux/fs.h>
+#include <linux/slab.h>
+#include "jfs_types.h"
+#include "jfs_filsys.h"
+#include "jfs_unicode.h"
+#include "jfs_debug.h"
+
+/*
+ * NAME:	jfs_strfromUCS()
+ *
+ * FUNCTION:	Convert little-endian unicode string to character string
+ *
+ */
+int jfs_strfromUCS_le(char *to, const wchar_t * from,	/* LITTLE ENDIAN */
+		      int len, struct nls_table *codepage)
+{
+	int i;
+	int outlen = 0;
+
+	for (i = 0; (i < len) && from[i]; i++) {
+		int charlen;
+		charlen =
+		    codepage->uni2char(le16_to_cpu(from[i]), &to[outlen],
+				       NLS_MAX_CHARSET_SIZE);
+		if (charlen > 0) {
+			outlen += charlen;
+		} else {
+			to[outlen++] = '?';
+		}
+	}
+	to[outlen] = 0;
+	jEVENT(0, ("jfs_strfromUCS returning %d - '%s'\n", outlen, to));
+	return outlen;
+}
+
+/*
+ * NAME:	jfs_strtoUCS()
+ *
+ * FUNCTION:	Convert character string to unicode string
+ *
+ */
+int jfs_strtoUCS(wchar_t * to,
+		 const char *from, int len, struct nls_table *codepage)
+{
+	int charlen;
+	int i;
+
+	jEVENT(0, ("jfs_strtoUCS - '%s'\n", from));
+
+	for (i = 0; len && *from; i++, from += charlen, len -= charlen) {
+		charlen = codepage->char2uni(from, len, &to[i]);
+		if (charlen < 1) {
+			jERROR(1, ("jfs_strtoUCS: char2uni returned %d.\n",
+				   charlen));
+			jERROR(1, ("charset = %s, char = 0x%x\n",
+				   codepage->charset, (unsigned char) *from));
+			to[i] = 0x003f;	/* a question mark */
+			charlen = 1;
+		}
+	}
+
+	jEVENT(0, (" returning %d\n", i));
+
+	to[i] = 0;
+	return i;
+}
+
+/*
+ * NAME:	get_UCSname()
+ *
+ * FUNCTION:	Allocate and translate to unicode string
+ *
+ */
+int get_UCSname(struct component_name * uniName, struct dentry *dentry,
+		struct nls_table *nls_tab)
+{
+	int length = dentry->d_name.len;
+
+	if (length > JFS_NAME_MAX)
+		return ENAMETOOLONG;
+
+	uniName->name =
+	    kmalloc((length + 1) * sizeof(wchar_t), GFP_NOFS);
+
+	if (uniName->name == NULL)
+		return ENOSPC;
+
+	uniName->namlen = jfs_strtoUCS(uniName->name, dentry->d_name.name,
+				       length, nls_tab);
+
+	return 0;
+}