2 * cifs_unicode: Unicode kernel case support
5 * Convert a unicode character to upper or lower case using
8 * Copyright (c) International Business Machines Corp., 2000,2005555555555555555555555555555555555555555555555555555555
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
18 * the GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
26 * These APIs are based on the C library functions. The semantics
27 * should match the C functions but with expanded size operands.
29 * The upper/lower functions are based on a table created by mkupr.
30 * This is a compressed table of upper and lower case conversion.
34 #include <asm/byteorder.h>
35 #include <linux/types.h>
36 #include <linux/nls.h>
38 #define UNIUPR_NOLOWER /* Example to not expand lower case tables */
40 /* Just define what we want from uniupr.h. We don't want to define the tables
41 * in each source file.
43 #ifndef UNICASERANGE_DEFINED
49 #endif /* UNICASERANGE_DEFINED */
51 #ifndef UNIUPR_NOUPPER
52 extern signed char CifsUniUpperTable[512];
53 extern const struct UniCaseRange CifsUniUpperRange[];
54 #endif /* UNIUPR_NOUPPER */
56 #ifndef UNIUPR_NOLOWER
57 extern signed char UniLowerTable[512];
58 extern struct UniCaseRange UniLowerRange[];
59 #endif /* UNIUPR_NOLOWER */
62 int cifs_strfromUCS_le(char *, const __le16 *, int, const struct nls_table *);
63 int cifs_strtoUCS(__le16 *, const char *, int, const struct nls_table *);
67 * UniStrcat: Concatenate the second string to the first
70 * Address of the first string
72 static inline wchar_t *
73 UniStrcat(wchar_t * ucs1, const wchar_t * ucs2)
75 wchar_t *anchor = ucs1; /* save a pointer to start of ucs1 */
77 while (*ucs1++) ; /* To end of first string */
78 ucs1--; /* Return to the null */
79 while ((*ucs1++ = *ucs2++)) ; /* copy string 2 over */
84 * UniStrchr: Find a character in a string
87 * Address of first occurrence of character in string
88 * or NULL if the character is not in the string
90 static inline wchar_t *
91 UniStrchr(const wchar_t * ucs, wchar_t uc)
93 while ((*ucs != uc) && *ucs)
97 return (wchar_t *) ucs;
102 * UniStrcmp: Compare two strings
105 * < 0: First string is less than second
106 * = 0: Strings are equal
107 * > 0: First string is greater than second
110 UniStrcmp(const wchar_t * ucs1, const wchar_t * ucs2)
112 while ((*ucs1 == *ucs2) && *ucs1) {
116 return (int) *ucs1 - (int) *ucs2;
120 * UniStrcpy: Copy a string
122 static inline wchar_t *
123 UniStrcpy(wchar_t * ucs1, const wchar_t * ucs2)
125 wchar_t *anchor = ucs1; /* save the start of result string */
127 while ((*ucs1++ = *ucs2++)) ;
132 * UniStrlen: Return the length of a string (in 16 bit Unicode chars not bytes)
135 UniStrlen(const wchar_t * ucs1)
145 * UniStrnlen: Return the length (in 16 bit Unicode chars not bytes) of a string (length limited)
148 UniStrnlen(const wchar_t * ucs1, int maxlen)
161 * UniStrncat: Concatenate length limited string
163 static inline wchar_t *
164 UniStrncat(wchar_t * ucs1, const wchar_t * ucs2, size_t n)
166 wchar_t *anchor = ucs1; /* save pointer to string 1 */
169 ucs1--; /* point to null terminator of s1 */
170 while (n-- && (*ucs1 = *ucs2)) { /* copy s2 after s1 */
174 *ucs1 = 0; /* Null terminate the result */
179 * UniStrncmp: Compare length limited string
182 UniStrncmp(const wchar_t * ucs1, const wchar_t * ucs2, size_t n)
185 return 0; /* Null strings are equal */
186 while ((*ucs1 == *ucs2) && *ucs1 && --n) {
190 return (int) *ucs1 - (int) *ucs2;
194 * UniStrncmp_le: Compare length limited string - native to little-endian
197 UniStrncmp_le(const wchar_t * ucs1, const wchar_t * ucs2, size_t n)
200 return 0; /* Null strings are equal */
201 while ((*ucs1 == __le16_to_cpu(*ucs2)) && *ucs1 && --n) {
205 return (int) *ucs1 - (int) __le16_to_cpu(*ucs2);
209 * UniStrncpy: Copy length limited string with pad
211 static inline wchar_t *
212 UniStrncpy(wchar_t * ucs1, const wchar_t * ucs2, size_t n)
214 wchar_t *anchor = ucs1;
216 while (n-- && *ucs2) /* Copy the strings */
220 while (n--) /* Pad with nulls */
226 * UniStrncpy_le: Copy length limited string with pad to little-endian
228 static inline wchar_t *
229 UniStrncpy_le(wchar_t * ucs1, const wchar_t * ucs2, size_t n)
231 wchar_t *anchor = ucs1;
233 while (n-- && *ucs2) /* Copy the strings */
234 *ucs1++ = __le16_to_cpu(*ucs2++);
237 while (n--) /* Pad with nulls */
243 * UniStrstr: Find a string in a string
246 * Address of first match found
247 * NULL if no matching string is found
249 static inline wchar_t *
250 UniStrstr(const wchar_t * ucs1, const wchar_t * ucs2)
252 const wchar_t *anchor1 = ucs1;
253 const wchar_t *anchor2 = ucs2;
256 if (*ucs1 == *ucs2) { /* Partial match found */
260 if (!*ucs2) /* Match found */
261 return (wchar_t *) anchor1;
262 ucs1 = ++anchor1; /* No match */
267 if (!*ucs2) /* Both end together */
268 return (wchar_t *) anchor1; /* Match found */
269 return NULL; /* No match */
272 #ifndef UNIUPR_NOUPPER
274 * UniToupper: Convert a unicode character to upper case
276 static inline wchar_t
277 UniToupper(register wchar_t uc)
279 register const struct UniCaseRange *rp;
281 if (uc < sizeof (CifsUniUpperTable)) { /* Latin characters */
282 return uc + CifsUniUpperTable[uc]; /* Use base tables */
284 rp = CifsUniUpperRange; /* Use range tables */
286 if (uc < rp->start) /* Before start of range */
287 return uc; /* Uppercase = input */
288 if (uc <= rp->end) /* In range */
289 return uc + rp->table[uc - rp->start];
290 rp++; /* Try next range */
293 return uc; /* Past last range */
297 * UniStrupr: Upper case a unicode string
299 static inline wchar_t *
300 UniStrupr(register wchar_t * upin)
302 register wchar_t *up;
305 while (*up) { /* For all characters */
306 *up = UniToupper(*up);
309 return upin; /* Return input pointer */
311 #endif /* UNIUPR_NOUPPER */
313 #ifndef UNIUPR_NOLOWER
315 * UniTolower: Convert a unicode character to lower case
317 static inline wchar_t
318 UniTolower(wchar_t uc)
320 register struct UniCaseRange *rp;
322 if (uc < sizeof (UniLowerTable)) { /* Latin characters */
323 return uc + UniLowerTable[uc]; /* Use base tables */
325 rp = UniLowerRange; /* Use range tables */
327 if (uc < rp->start) /* Before start of range */
328 return uc; /* Uppercase = input */
329 if (uc <= rp->end) /* In range */
330 return uc + rp->table[uc - rp->start];
331 rp++; /* Try next range */
334 return uc; /* Past last range */
338 * UniStrlwr: Lower case a unicode string
340 static inline wchar_t *
341 UniStrlwr(register wchar_t * upin)
343 register wchar_t *up;
346 while (*up) { /* For all characters */
347 *up = UniTolower(*up);
350 return upin; /* Return input pointer */