1/* SPDX-License-Identifier: GPL-2.0-or-later */
2/*
3 * cifs_unicode:  Unicode kernel case support
4 *
5 * Function:
6 *     Convert a unicode character to upper or lower case using
7 *     compressed tables.
8 *
9 *   Copyright (c) International Business Machines  Corp., 2000,2009
10 *
11 * Notes:
12 *     These APIs are based on the C library functions.  The semantics
13 *     should match the C functions but with expanded size operands.
14 *
15 *     The upper/lower functions are based on a table created by mkupr.
16 *     This is a compressed table of upper and lower case conversion.
17 */
18#ifndef _CIFS_UNICODE_H
19#define _CIFS_UNICODE_H
20
21#include <asm/byteorder.h>
22#include <linux/types.h>
23#include <linux/nls.h>
24#include "../../nls/nls_ucs2_utils.h"
25
26/*
27 * Macs use an older "SFM" mapping of the symbols above. Fortunately it does
28 * not conflict (although almost does) with the mapping above.
29 */
30
31#define SFM_DOUBLEQUOTE ((__u16) 0xF020)
32#define SFM_ASTERISK    ((__u16) 0xF021)
33#define SFM_QUESTION    ((__u16) 0xF025)
34#define SFM_COLON       ((__u16) 0xF022)
35#define SFM_GRTRTHAN    ((__u16) 0xF024)
36#define SFM_LESSTHAN    ((__u16) 0xF023)
37#define SFM_PIPE        ((__u16) 0xF027)
38#define SFM_SLASH       ((__u16) 0xF026)
39#define SFM_SPACE	((__u16) 0xF028)
40#define SFM_PERIOD	((__u16) 0xF029)
41
42/*
43 * Mapping mechanism to use when one of the seven reserved characters is
44 * encountered.  We can only map using one of the mechanisms at a time
45 * since otherwise readdir could return directory entries which we would
46 * not be able to open
47 *
48 * NO_MAP_UNI_RSVD  = do not perform any remapping of the character
49 * SFM_MAP_UNI_RSVD = map reserved characters using SFM scheme (MAC compatible)
50 * SFU_MAP_UNI_RSVD = map reserved characters ala SFU ("mapchars" option)
51 *
52 */
53#define NO_MAP_UNI_RSVD		0
54#define SFM_MAP_UNI_RSVD	1
55#define SFU_MAP_UNI_RSVD	2
56
57#ifdef __KERNEL__
58int cifs_from_utf16(char *to, const __le16 *from, int tolen, int fromlen,
59		    const struct nls_table *cp, int map_type);
60int cifs_utf16_bytes(const __le16 *from, int maxbytes,
61		     const struct nls_table *codepage);
62int cifs_strtoUTF16(__le16 *, const char *, int, const struct nls_table *);
63char *cifs_strndup_from_utf16(const char *src, const int maxlen,
64			      const bool is_unicode,
65			      const struct nls_table *codepage);
66extern int cifsConvertToUTF16(__le16 *target, const char *source, int maxlen,
67			      const struct nls_table *cp, int mapChars);
68extern int cifs_remap(struct cifs_sb_info *cifs_sb);
69extern __le16 *cifs_strndup_to_utf16(const char *src, const int maxlen,
70				     int *utf16_len, const struct nls_table *cp,
71				     int remap);
72#endif
73
74wchar_t cifs_toupper(wchar_t in);
75
76#endif /* _CIFS_UNICODE_H */
77