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-rw-r--r--fs/jfs/jfs_unicode.h136
1 files changed, 136 insertions, 0 deletions
diff --git a/fs/jfs/jfs_unicode.h b/fs/jfs/jfs_unicode.h
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+++ b/fs/jfs/jfs_unicode.h
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+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright (C) International Business Machines Corp., 2000-2002
+ * Portions Copyright (C) Christoph Hellwig, 2001-2002
+ */
+#ifndef _H_JFS_UNICODE
+#define _H_JFS_UNICODE
+
+#include <linux/slab.h>
+#include <asm/byteorder.h>
+#include "../nls/nls_ucs2_data.h"
+#include "jfs_types.h"
+
+extern int get_UCSname(struct component_name *, struct dentry *);
+extern int jfs_strfromUCS_le(char *, const __le16 *, int, struct nls_table *);
+
+#define free_UCSname(COMP) kfree((COMP)->name)
+
+/*
+ * UniStrcpy: Copy a string
+ */
+static inline wchar_t *UniStrcpy(wchar_t * ucs1, const wchar_t * ucs2)
+{
+ wchar_t *anchor = ucs1; /* save the start of result string */
+
+ while ((*ucs1++ = *ucs2++));
+ return anchor;
+}
+
+
+
+/*
+ * UniStrncpy: Copy length limited string with pad
+ */
+static inline __le16 *UniStrncpy_le(__le16 * ucs1, const __le16 * ucs2,
+ size_t n)
+{
+ __le16 *anchor = ucs1;
+
+ while (n-- && *ucs2) /* Copy the strings */
+ *ucs1++ = *ucs2++;
+
+ n++;
+ while (n--) /* Pad with nulls */
+ *ucs1++ = 0;
+ return anchor;
+}
+
+/*
+ * UniStrncmp_le: Compare length limited string - native to little-endian
+ */
+static inline int UniStrncmp_le(const wchar_t * ucs1, const __le16 * ucs2,
+ size_t n)
+{
+ if (!n)
+ return 0; /* Null strings are equal */
+ while ((*ucs1 == __le16_to_cpu(*ucs2)) && *ucs1 && --n) {
+ ucs1++;
+ ucs2++;
+ }
+ return (int) *ucs1 - (int) __le16_to_cpu(*ucs2);
+}
+
+/*
+ * UniStrncpy_to_le: Copy length limited string with pad to little-endian
+ */
+static inline __le16 *UniStrncpy_to_le(__le16 * ucs1, const wchar_t * ucs2,
+ size_t n)
+{
+ __le16 *anchor = ucs1;
+
+ while (n-- && *ucs2) /* Copy the strings */
+ *ucs1++ = cpu_to_le16(*ucs2++);
+
+ n++;
+ while (n--) /* Pad with nulls */
+ *ucs1++ = 0;
+ return anchor;
+}
+
+/*
+ * UniStrncpy_from_le: Copy length limited string with pad from little-endian
+ */
+static inline wchar_t *UniStrncpy_from_le(wchar_t * ucs1, const __le16 * ucs2,
+ size_t n)
+{
+ wchar_t *anchor = ucs1;
+
+ while (n-- && *ucs2) /* Copy the strings */
+ *ucs1++ = __le16_to_cpu(*ucs2++);
+
+ n++;
+ while (n--) /* Pad with nulls */
+ *ucs1++ = 0;
+ return anchor;
+}
+
+/*
+ * UniToupper: Convert a unicode character to upper case
+ */
+static inline wchar_t UniToupper(wchar_t uc)
+{
+ const struct UniCaseRange *rp;
+
+ if (uc < sizeof(NlsUniUpperTable)) { /* Latin characters */
+ return uc + NlsUniUpperTable[uc]; /* Use base tables */
+ } else {
+ rp = NlsUniUpperRange; /* Use range tables */
+ while (rp->start) {
+ if (uc < rp->start) /* Before start of range */
+ return uc; /* Uppercase = input */
+ if (uc <= rp->end) /* In range */
+ return uc + rp->table[uc - rp->start];
+ rp++; /* Try next range */
+ }
+ }
+ return uc; /* Past last range */
+}
+
+
+/*
+ * UniStrupr: Upper case a unicode string
+ */
+static inline wchar_t *UniStrupr(wchar_t * upin)
+{
+ wchar_t *up;
+
+ up = upin;
+ while (*up) { /* For all characters */
+ *up = UniToupper(*up);
+ up++;
+ }
+ return upin; /* Return input pointer */
+}
+
+#endif /* !_H_JFS_UNICODE */