144 lines
3.1 KiB
C
144 lines
3.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* Copyright (C) International Business Machines Corp., 2000-2002
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* Portions Copyright (C) Christoph Hellwig, 2001-2002
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*/
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#ifndef _H_JFS_UNICODE
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#define _H_JFS_UNICODE
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#include <linux/slab.h>
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#include <asm/byteorder.h>
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#include "jfs_types.h"
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typedef struct {
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wchar_t start;
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wchar_t end;
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signed char *table;
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} UNICASERANGE;
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extern signed char UniUpperTable[512];
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extern UNICASERANGE UniUpperRange[];
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extern int get_UCSname(struct component_name *, struct dentry *);
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extern int jfs_strfromUCS_le(char *, const __le16 *, int, struct nls_table *);
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#define free_UCSname(COMP) kfree((COMP)->name)
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/*
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* UniStrcpy: Copy a string
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*/
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static inline wchar_t *UniStrcpy(wchar_t * ucs1, const wchar_t * ucs2)
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{
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wchar_t *anchor = ucs1; /* save the start of result string */
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while ((*ucs1++ = *ucs2++));
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return anchor;
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}
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/*
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* UniStrncpy: Copy length limited string with pad
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*/
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static inline __le16 *UniStrncpy_le(__le16 * ucs1, const __le16 * ucs2,
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size_t n)
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{
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__le16 *anchor = ucs1;
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while (n-- && *ucs2) /* Copy the strings */
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*ucs1++ = *ucs2++;
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n++;
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while (n--) /* Pad with nulls */
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*ucs1++ = 0;
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return anchor;
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}
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/*
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* UniStrncmp_le: Compare length limited string - native to little-endian
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*/
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static inline int UniStrncmp_le(const wchar_t * ucs1, const __le16 * ucs2,
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size_t n)
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{
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if (!n)
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return 0; /* Null strings are equal */
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while ((*ucs1 == __le16_to_cpu(*ucs2)) && *ucs1 && --n) {
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ucs1++;
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ucs2++;
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}
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return (int) *ucs1 - (int) __le16_to_cpu(*ucs2);
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}
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/*
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* UniStrncpy_to_le: Copy length limited string with pad to little-endian
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*/
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static inline __le16 *UniStrncpy_to_le(__le16 * ucs1, const wchar_t * ucs2,
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size_t n)
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{
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__le16 *anchor = ucs1;
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while (n-- && *ucs2) /* Copy the strings */
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*ucs1++ = cpu_to_le16(*ucs2++);
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n++;
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while (n--) /* Pad with nulls */
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*ucs1++ = 0;
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return anchor;
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}
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/*
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* UniStrncpy_from_le: Copy length limited string with pad from little-endian
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*/
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static inline wchar_t *UniStrncpy_from_le(wchar_t * ucs1, const __le16 * ucs2,
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size_t n)
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{
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wchar_t *anchor = ucs1;
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while (n-- && *ucs2) /* Copy the strings */
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*ucs1++ = __le16_to_cpu(*ucs2++);
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n++;
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while (n--) /* Pad with nulls */
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*ucs1++ = 0;
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return anchor;
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}
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/*
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* UniToupper: Convert a unicode character to upper case
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*/
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static inline wchar_t UniToupper(wchar_t uc)
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{
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UNICASERANGE *rp;
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if (uc < sizeof(UniUpperTable)) { /* Latin characters */
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return uc + UniUpperTable[uc]; /* Use base tables */
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} else {
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rp = UniUpperRange; /* Use range tables */
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while (rp->start) {
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if (uc < rp->start) /* Before start of range */
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return uc; /* Uppercase = input */
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if (uc <= rp->end) /* In range */
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return uc + rp->table[uc - rp->start];
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rp++; /* Try next range */
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}
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}
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return uc; /* Past last range */
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}
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/*
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* UniStrupr: Upper case a unicode string
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*/
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static inline wchar_t *UniStrupr(wchar_t * upin)
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{
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wchar_t *up;
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up = upin;
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while (*up) { /* For all characters */
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*up = UniToupper(*up);
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up++;
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}
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return upin; /* Return input pointer */
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}
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#endif /* !_H_JFS_UNICODE */
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