linux/fs/jfs/jfs_unicode.h
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   1/*
   2 *   Copyright (C) International Business Machines Corp., 2000-2002
   3 *   Portions Copyright (C) Christoph Hellwig, 2001-2002
   4 *
   5 *   This program is free software;  you can redistribute it and/or modify
   6 *   it under the terms of the GNU General Public License as published by
   7 *   the Free Software Foundation; either version 2 of the License, or
   8 *   (at your option) any later version.
   9 *
  10 *   This program is distributed in the hope that it will be useful,
  11 *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
  12 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
  13 *   the GNU General Public License for more details.
  14 *
  15 *   You should have received a copy of the GNU General Public License
  16 *   along with this program;  if not, write to the Free Software
  17 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  18 */
  19#ifndef _H_JFS_UNICODE
  20#define _H_JFS_UNICODE
  21
  22#include <linux/slab.h>
  23#include <asm/byteorder.h>
  24#include "jfs_types.h"
  25
  26typedef struct {
  27        wchar_t start;
  28        wchar_t end;
  29        signed char *table;
  30} UNICASERANGE;
  31
  32extern signed char UniUpperTable[512];
  33extern UNICASERANGE UniUpperRange[];
  34extern int get_UCSname(struct component_name *, struct dentry *);
  35extern int jfs_strfromUCS_le(char *, const __le16 *, int, struct nls_table *);
  36
  37#define free_UCSname(COMP) kfree((COMP)->name)
  38
  39/*
  40 * UniStrcpy:  Copy a string
  41 */
  42static inline wchar_t *UniStrcpy(wchar_t * ucs1, const wchar_t * ucs2)
  43{
  44        wchar_t *anchor = ucs1; /* save the start of result string */
  45
  46        while ((*ucs1++ = *ucs2++));
  47        return anchor;
  48}
  49
  50
  51
  52/*
  53 * UniStrncpy:  Copy length limited string with pad
  54 */
  55static inline __le16 *UniStrncpy_le(__le16 * ucs1, const __le16 * ucs2,
  56                                  size_t n)
  57{
  58        __le16 *anchor = ucs1;
  59
  60        while (n-- && *ucs2)    /* Copy the strings */
  61                *ucs1++ = *ucs2++;
  62
  63        n++;
  64        while (n--)             /* Pad with nulls */
  65                *ucs1++ = 0;
  66        return anchor;
  67}
  68
  69/*
  70 * UniStrncmp_le:  Compare length limited string - native to little-endian
  71 */
  72static inline int UniStrncmp_le(const wchar_t * ucs1, const __le16 * ucs2,
  73                                size_t n)
  74{
  75        if (!n)
  76                return 0;       /* Null strings are equal */
  77        while ((*ucs1 == __le16_to_cpu(*ucs2)) && *ucs1 && --n) {
  78                ucs1++;
  79                ucs2++;
  80        }
  81        return (int) *ucs1 - (int) __le16_to_cpu(*ucs2);
  82}
  83
  84/*
  85 * UniStrncpy_to_le:  Copy length limited string with pad to little-endian
  86 */
  87static inline __le16 *UniStrncpy_to_le(__le16 * ucs1, const wchar_t * ucs2,
  88                                       size_t n)
  89{
  90        __le16 *anchor = ucs1;
  91
  92        while (n-- && *ucs2)    /* Copy the strings */
  93                *ucs1++ = cpu_to_le16(*ucs2++);
  94
  95        n++;
  96        while (n--)             /* Pad with nulls */
  97                *ucs1++ = 0;
  98        return anchor;
  99}
 100
 101/*
 102 * UniStrncpy_from_le:  Copy length limited string with pad from little-endian
 103 */
 104static inline wchar_t *UniStrncpy_from_le(wchar_t * ucs1, const __le16 * ucs2,
 105                                          size_t n)
 106{
 107        wchar_t *anchor = ucs1;
 108
 109        while (n-- && *ucs2)    /* Copy the strings */
 110                *ucs1++ = __le16_to_cpu(*ucs2++);
 111
 112        n++;
 113        while (n--)             /* Pad with nulls */
 114                *ucs1++ = 0;
 115        return anchor;
 116}
 117
 118/*
 119 * UniToupper:  Convert a unicode character to upper case
 120 */
 121static inline wchar_t UniToupper(wchar_t uc)
 122{
 123        UNICASERANGE *rp;
 124
 125        if (uc < sizeof(UniUpperTable)) {       /* Latin characters */
 126                return uc + UniUpperTable[uc];  /* Use base tables */
 127        } else {
 128                rp = UniUpperRange;     /* Use range tables */
 129                while (rp->start) {
 130                        if (uc < rp->start)     /* Before start of range */
 131                                return uc;      /* Uppercase = input */
 132                        if (uc <= rp->end)      /* In range */
 133                                return uc + rp->table[uc - rp->start];
 134                        rp++;   /* Try next range */
 135                }
 136        }
 137        return uc;              /* Past last range */
 138}
 139
 140
 141/*
 142 * UniStrupr:  Upper case a unicode string
 143 */
 144static inline wchar_t *UniStrupr(wchar_t * upin)
 145{
 146        wchar_t *up;
 147
 148        up = upin;
 149        while (*up) {           /* For all characters */
 150                *up = UniToupper(*up);
 151                up++;
 152        }
 153        return upin;            /* Return input pointer */
 154}
 155
 156#endif                          /* !_H_JFS_UNICODE */
 157
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