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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 
 26 typedef struct {
 27         wchar_t start;
 28         wchar_t end;
 29         signed char *table;
 30 } UNICASERANGE;
 31 
 32 extern signed char UniUpperTable[512];
 33 extern UNICASERANGE UniUpperRange[];
 34 extern int get_UCSname(struct component_name *, struct dentry *);
 35 extern 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  */
 42 static 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  */
 55 static 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  */
 72 static 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  */
 87 static 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  */
104 static 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  */
121 static 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  */
144 static 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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