--- /dev/null
+/*
+ * cifs_unicode: Unicode kernel case support
+ *
+ * Function:
+ * Convert a unicode character to upper or lower case using
+ * compressed tables.
+ *
+ * Copyright (c) International Business Machines Corp., 2000,2009
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
+ * the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ *
+ * Notes:
+ * These APIs are based on the C library functions. The semantics
+ * should match the C functions but with expanded size operands.
+ *
+ * The upper/lower functions are based on a table created by mkupr.
+ * This is a compressed table of upper and lower case conversion.
+ *
+ */
+#ifndef _CIFS_UNICODE_H
+#define _CIFS_UNICODE_H
+
+#include <asm/byteorder.h>
+#include <linux/types.h>
+#include <linux/nls.h>
+
+#define UNIUPR_NOLOWER /* Example to not expand lower case tables */
+
+/*
+ * Windows maps these to the user defined 16 bit Unicode range since they are
+ * reserved symbols (along with \ and /), otherwise illegal to store
+ * in filenames in NTFS
+ */
+#define UNI_ASTERISK (__u16) ('*' + 0xF000)
+#define UNI_QUESTION (__u16) ('?' + 0xF000)
+#define UNI_COLON (__u16) (':' + 0xF000)
+#define UNI_GRTRTHAN (__u16) ('>' + 0xF000)
+#define UNI_LESSTHAN (__u16) ('<' + 0xF000)
+#define UNI_PIPE (__u16) ('|' + 0xF000)
+#define UNI_SLASH (__u16) ('\\' + 0xF000)
+
+/*
+ * Macs use an older "SFM" mapping of the symbols above. Fortunately it does
+ * not conflict (although almost does) with the mapping above.
+ */
+
+#define SFM_ASTERISK ((__u16) 0xF021)
+#define SFM_QUESTION ((__u16) 0xF025)
+#define SFM_COLON ((__u16) 0xF022)
+#define SFM_GRTRTHAN ((__u16) 0xF024)
+#define SFM_LESSTHAN ((__u16) 0xF023)
+#define SFM_PIPE ((__u16) 0xF027)
+#define SFM_SLASH ((__u16) 0xF026)
+
+/*
+ * Mapping mechanism to use when one of the seven reserved characters is
+ * encountered. We can only map using one of the mechanisms at a time
+ * since otherwise readdir could return directory entries which we would
+ * not be able to open
+ *
+ * NO_MAP_UNI_RSVD = do not perform any remapping of the character
+ * SFM_MAP_UNI_RSVD = map reserved characters using SFM scheme (MAC compatible)
+ * SFU_MAP_UNI_RSVD = map reserved characters ala SFU ("mapchars" option)
+ *
+ */
+#define NO_MAP_UNI_RSVD 0
+#define SFM_MAP_UNI_RSVD 1
+#define SFU_MAP_UNI_RSVD 2
+
+/* Just define what we want from uniupr.h. We don't want to define the tables
+ * in each source file.
+ */
+#ifndef UNICASERANGE_DEFINED
+struct UniCaseRange {
+ wchar_t start;
+ wchar_t end;
+ signed char *table;
+};
+#endif /* UNICASERANGE_DEFINED */
+
+#ifndef UNIUPR_NOUPPER
+extern signed char CifsUniUpperTable[512];
+extern const struct UniCaseRange CifsUniUpperRange[];
+#endif /* UNIUPR_NOUPPER */
+
+#ifndef UNIUPR_NOLOWER
+extern signed char CifsUniLowerTable[512];
+extern const struct UniCaseRange CifsUniLowerRange[];
+#endif /* UNIUPR_NOLOWER */
+
+#ifdef __KERNEL__
+int cifs_from_utf16(char *to, const __le16 *from, int tolen, int fromlen,
+ const struct nls_table *cp, int map_type);
+int cifs_utf16_bytes(const __le16 *from, int maxbytes,
+ const struct nls_table *codepage);
+int cifs_strtoUTF16(__le16 *, const char *, int, const struct nls_table *);
+char *cifs_strndup_from_utf16(const char *src, const int maxlen,
+ const bool is_unicode,
+ const struct nls_table *codepage);
+extern int cifsConvertToUTF16(__le16 *target, const char *source, int maxlen,
+ const struct nls_table *cp, int mapChars);
+extern int cifs_remap(struct cifs_sb_info *cifs_sb);
+#ifdef CONFIG_CIFS_SMB2
+extern __le16 *cifs_strndup_to_utf16(const char *src, const int maxlen,
+ int *utf16_len, const struct nls_table *cp,
+ int remap);
+#endif /* CONFIG_CIFS_SMB2 */
+#endif
+
+wchar_t cifs_toupper(wchar_t in);
+
+/*
+ * UniStrcat: Concatenate the second string to the first
+ *
+ * Returns:
+ * Address of the first string
+ */
+static inline wchar_t *
+UniStrcat(wchar_t *ucs1, const wchar_t *ucs2)
+{
+ wchar_t *anchor = ucs1; /* save a pointer to start of ucs1 */
+
+ while (*ucs1++) ; /* To end of first string */
+ ucs1--; /* Return to the null */
+ while ((*ucs1++ = *ucs2++)) ; /* copy string 2 over */
+ return anchor;
+}
+
+/*
+ * UniStrchr: Find a character in a string
+ *
+ * Returns:
+ * Address of first occurrence of character in string
+ * or NULL if the character is not in the string
+ */
+static inline wchar_t *
+UniStrchr(const wchar_t *ucs, wchar_t uc)
+{
+ while ((*ucs != uc) && *ucs)
+ ucs++;
+
+ if (*ucs == uc)
+ return (wchar_t *) ucs;
+ return NULL;
+}
+
+/*
+ * UniStrcmp: Compare two strings
+ *
+ * Returns:
+ * < 0: First string is less than second
+ * = 0: Strings are equal
+ * > 0: First string is greater than second
+ */
+static inline int
+UniStrcmp(const wchar_t *ucs1, const wchar_t *ucs2)
+{
+ while ((*ucs1 == *ucs2) && *ucs1) {
+ ucs1++;
+ ucs2++;
+ }
+ return (int) *ucs1 - (int) *ucs2;
+}
+
+/*
+ * UniStrcpy: Copy a string
+ */
+static inline wchar_t *
+UniStrcpy(wchar_t *ucs1, const wchar_t *ucs2)
+{
+ wchar_t *anchor = ucs1; /* save the start of result string */
+
+ while ((*ucs1++ = *ucs2++)) ;
+ return anchor;
+}
+
+/*
+ * UniStrlen: Return the length of a string (in 16 bit Unicode chars not bytes)
+ */
+static inline size_t
+UniStrlen(const wchar_t *ucs1)
+{
+ int i = 0;
+
+ while (*ucs1++)
+ i++;
+ return i;
+}
+
+/*
+ * UniStrnlen: Return the length (in 16 bit Unicode chars not bytes) of a
+ * string (length limited)
+ */
+static inline size_t
+UniStrnlen(const wchar_t *ucs1, int maxlen)
+{
+ int i = 0;
+
+ while (*ucs1++) {
+ i++;
+ if (i >= maxlen)
+ break;
+ }
+ return i;
+}
+
+/*
+ * UniStrncat: Concatenate length limited string
+ */
+static inline wchar_t *
+UniStrncat(wchar_t *ucs1, const wchar_t *ucs2, size_t n)
+{
+ wchar_t *anchor = ucs1; /* save pointer to string 1 */
+
+ while (*ucs1++) ;
+ ucs1--; /* point to null terminator of s1 */
+ while (n-- && (*ucs1 = *ucs2)) { /* copy s2 after s1 */
+ ucs1++;
+ ucs2++;
+ }
+ *ucs1 = 0; /* Null terminate the result */
+ return (anchor);
+}
+
+/*
+ * UniStrncmp: Compare length limited string
+ */
+static inline int
+UniStrncmp(const wchar_t *ucs1, const wchar_t *ucs2, size_t n)
+{
+ if (!n)
+ return 0; /* Null strings are equal */
+ while ((*ucs1 == *ucs2) && *ucs1 && --n) {
+ ucs1++;
+ ucs2++;
+ }
+ return (int) *ucs1 - (int) *ucs2;
+}
+
+/*
+ * UniStrncmp_le: Compare length limited string - native to little-endian
+ */
+static inline int
+UniStrncmp_le(const wchar_t *ucs1, const wchar_t *ucs2, size_t n)
+{
+ if (!n)
+ return 0; /* Null strings are equal */
+ while ((*ucs1 == __le16_to_cpu(*ucs2)) && *ucs1 && --n) {
+ ucs1++;
+ ucs2++;
+ }
+ return (int) *ucs1 - (int) __le16_to_cpu(*ucs2);
+}
+
+/*
+ * UniStrncpy: Copy length limited string with pad
+ */
+static inline wchar_t *
+UniStrncpy(wchar_t *ucs1, const wchar_t *ucs2, size_t n)
+{
+ wchar_t *anchor = ucs1;
+
+ while (n-- && *ucs2) /* Copy the strings */
+ *ucs1++ = *ucs2++;
+
+ n++;
+ while (n--) /* Pad with nulls */
+ *ucs1++ = 0;
+ return anchor;
+}
+
+/*
+ * UniStrncpy_le: Copy length limited string with pad to little-endian
+ */
+static inline wchar_t *
+UniStrncpy_le(wchar_t *ucs1, const wchar_t *ucs2, size_t n)
+{
+ wchar_t *anchor = ucs1;
+
+ while (n-- && *ucs2) /* Copy the strings */
+ *ucs1++ = __le16_to_cpu(*ucs2++);
+
+ n++;
+ while (n--) /* Pad with nulls */
+ *ucs1++ = 0;
+ return anchor;
+}
+
+/*
+ * UniStrstr: Find a string in a string
+ *
+ * Returns:
+ * Address of first match found
+ * NULL if no matching string is found
+ */
+static inline wchar_t *
+UniStrstr(const wchar_t *ucs1, const wchar_t *ucs2)
+{
+ const wchar_t *anchor1 = ucs1;
+ const wchar_t *anchor2 = ucs2;
+
+ while (*ucs1) {
+ if (*ucs1 == *ucs2) {
+ /* Partial match found */
+ ucs1++;
+ ucs2++;
+ } else {
+ if (!*ucs2) /* Match found */
+ return (wchar_t *) anchor1;
+ ucs1 = ++anchor1; /* No match */
+ ucs2 = anchor2;
+ }
+ }
+
+ if (!*ucs2) /* Both end together */
+ return (wchar_t *) anchor1; /* Match found */
+ return NULL; /* No match */
+}
+
+#ifndef UNIUPR_NOUPPER
+/*
+ * UniToupper: Convert a unicode character to upper case
+ */
+static inline wchar_t
+UniToupper(register wchar_t uc)
+{
+ register const struct UniCaseRange *rp;
+
+ if (uc < sizeof(CifsUniUpperTable)) {
+ /* Latin characters */
+ return uc + CifsUniUpperTable[uc]; /* Use base tables */
+ } else {
+ rp = CifsUniUpperRange; /* Use range tables */
+ while (rp->start) {
+ if (uc < rp->start) /* Before start of range */
+ return uc; /* Uppercase = input */
+ if (uc <= rp->end) /* In range */
+ return uc + rp->table[uc - rp->start];
+ rp++; /* Try next range */
+ }
+ }
+ return uc; /* Past last range */
+}
+
+/*
+ * UniStrupr: Upper case a unicode string
+ */
+static inline __le16 *
+UniStrupr(register __le16 *upin)
+{
+ register __le16 *up;
+
+ up = upin;
+ while (*up) { /* For all characters */
+ *up = cpu_to_le16(UniToupper(le16_to_cpu(*up)));
+ up++;
+ }
+ return upin; /* Return input pointer */
+}
+#endif /* UNIUPR_NOUPPER */
+
+#ifndef UNIUPR_NOLOWER
+/*
+ * UniTolower: Convert a unicode character to lower case
+ */
+static inline wchar_t
+UniTolower(register wchar_t uc)
+{
+ register const struct UniCaseRange *rp;
+
+ if (uc < sizeof(CifsUniLowerTable)) {
+ /* Latin characters */
+ return uc + CifsUniLowerTable[uc]; /* Use base tables */
+ } else {
+ rp = CifsUniLowerRange; /* Use range tables */
+ while (rp->start) {
+ if (uc < rp->start) /* Before start of range */
+ return uc; /* Uppercase = input */
+ if (uc <= rp->end) /* In range */
+ return uc + rp->table[uc - rp->start];
+ rp++; /* Try next range */
+ }
+ }
+ return uc; /* Past last range */
+}
+
+/*
+ * UniStrlwr: Lower case a unicode string
+ */
+static inline wchar_t *
+UniStrlwr(register wchar_t *upin)
+{
+ register wchar_t *up;
+
+ up = upin;
+ while (*up) { /* For all characters */
+ *up = UniTolower(*up);
+ up++;
+ }
+ return upin; /* Return input pointer */
+}
+
+#endif
+
+#endif /* _CIFS_UNICODE_H */
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