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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 "jfs_types.h"
typedef struct {
wchar_t start;
wchar_t end;
signed char *table;
} UNICASERANGE;
extern signed char UniUpperTable[512];
extern UNICASERANGE UniUpperRange[];
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)
{
UNICASERANGE *rp;
if (uc < sizeof(UniUpperTable)) { /* Latin characters */
return uc + UniUpperTable[uc]; /* Use base tables */
} else {
rp = UniUpperRange; /* 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 */
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