cregit-Linux how code gets into the kernel

Release 4.11 fs/cifs/cifs_unicode.h

Directory: fs/cifs
/*
 * 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)

#define SFM_PERIOD	((__u16) 0xF028)

#define SFM_SPACE	((__u16) 0xF029)

/*
 * 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 __le16 * UniStrcat(__le16 *ucs1, const __le16 *ucs2) { __le16 *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; }

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/* * 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; }

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/* * 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; }

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/* * 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; }

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/* * 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; }

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/* * 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; }

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/* * 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); }

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/* * 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; }

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/* * 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); }

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/* * 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; }

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/* * 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; }

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/* * 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 */ }

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#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 */ }

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/* * 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 */ }

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#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 */ }

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Steve French9494.95%150.00%
Igor Druzhinin55.05%150.00%
Total99100.00%2100.00%

/* * 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 */ }

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#endif #endif /* _CIFS_UNICODE_H */

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Steve French120688.81%1155.00%
Jeff Layton1007.36%630.00%
Pavel Shilovsky342.50%15.00%
Igor Druzhinin171.25%15.00%
Steven Cole10.07%15.00%
Total1358100.00%20100.00%
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