~drizzle-trunk/drizzle/development

/* Copyright (C) 2000 MySQL AB

   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; version 2 of the License.

   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., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA */

/*

  A better inplementation of the UNIX ctype(3) library.

*/

#ifndef DRIZZLED_CHARSET_INFO_H

#define DRIZZLED_CHARSET_INFO_H

#include <sys/types.h>

#include <cstddef>

#include <drizzled/visibility.h>

namespace drizzled

{

#define MY_CS_NAME_SIZE			32

#define MY_CS_CTYPE_TABLE_SIZE		257

#define MY_CS_TO_LOWER_TABLE_SIZE	256

#define MY_CS_TO_UPPER_TABLE_SIZE	256

#define MY_CS_SORT_ORDER_TABLE_SIZE	256

#define MY_CS_TO_UNI_TABLE_SIZE		256

#define CHARSET_DIR	"charsets/"

#define my_wc_t unsigned long

typedef struct unicase_info_st

{

  uint16_t toupper;

  uint16_t tolower;

  uint16_t sort;

} MY_UNICASE_INFO;

extern MY_UNICASE_INFO *my_unicase_default[256];

extern MY_UNICASE_INFO *my_unicase_turkish[256];

typedef struct uni_ctype_st

{

  unsigned char  pctype;

  unsigned char  *ctype;

} MY_UNI_CTYPE;

extern MY_UNI_CTYPE my_uni_ctype[256];

/* wm_wc and wc_mb return codes */

#define MY_CS_ILSEQ	0     /* Wrong by sequence: wb_wc                   */

#define MY_CS_ILUNI	0     /* Cannot encode Unicode to charset: wc_mb    */

#define MY_CS_TOOSMALL  -101  /* Need at least one byte:    wc_mb and mb_wc */

#define MY_CS_TOOSMALL2 -102  /* Need at least two bytes:   wc_mb and mb_wc */

#define MY_CS_TOOSMALL3 -103  /* Need at least three bytes: wc_mb and mb_wc */

/* These following three are currently not really used */

#define MY_CS_TOOSMALL4 -104  /* Need at least 4 bytes: wc_mb and mb_wc */

#define MY_CS_TOOSMALL5 -105  /* Need at least 5 bytes: wc_mb and mb_wc */

#define MY_CS_TOOSMALL6 -106  /* Need at least 6 bytes: wc_mb and mb_wc */

/* A helper function for "need at least n bytes" */

inline static int my_cs_toosmalln(int n)

{

  return -100-n;

}

#define MY_SEQ_INTTAIL	1

#define MY_SEQ_SPACES	2

        /* My charsets_list flags */

#define MY_CS_COMPILED  1      /* compiled-in sets               */

#define MY_CS_CONFIG    2      /* sets that have a *.conf file   */

#define MY_CS_INDEX     4      /* sets listed in the Index file  */

#define MY_CS_LOADED    8      /* sets that are currently loaded */

#define MY_CS_BINSORT	16     /* if binary sort order           */

#define MY_CS_PRIMARY	32     /* if primary collation           */

#define MY_CS_STRNXFRM	64     /* if strnxfrm is used for sort   */

#define MY_CS_UNICODE	128    /* is a charset is full unicode   */

#define MY_CS_READY	256    /* if a charset is initialized    */

#define MY_CS_AVAILABLE	512    /* If either compiled-in or loaded*/

#define MY_CS_CSSORT	1024   /* if case sensitive sort order   */

#define MY_CS_HIDDEN	2048   /* don't display in SHOW          */

#define MY_CS_NONASCII  8192   /* if not ASCII-compatible        */

#define MY_CHARSET_UNDEFINED 0

/* Flags for strxfrm */

#define MY_STRXFRM_LEVEL1          0x00000001 /* for primary weights   */

#define MY_STRXFRM_LEVEL2          0x00000002 /* for secondary weights */

#define MY_STRXFRM_LEVEL3          0x00000004 /* for tertiary weights  */

#define MY_STRXFRM_LEVEL4          0x00000008 /* fourth level weights  */

#define MY_STRXFRM_LEVEL5          0x00000010 /* fifth level weights   */

#define MY_STRXFRM_LEVEL6          0x00000020 /* sixth level weights   */

#define MY_STRXFRM_LEVEL_ALL       0x0000003F /* Bit OR for the above six */

#define MY_STRXFRM_NLEVELS         6          /* Number of possible levels*/

#define MY_STRXFRM_PAD_WITH_SPACE  0x00000040 /* if pad result with spaces */

#define MY_STRXFRM_UNUSED_00000080 0x00000080 /* for future extensions     */

#define MY_STRXFRM_DESC_LEVEL1     0x00000100 /* if desc order for level1 */

#define MY_STRXFRM_DESC_LEVEL2     0x00000200 /* if desc order for level2 */

#define MY_STRXFRM_DESC_LEVEL3     0x00000300 /* if desc order for level3 */

#define MY_STRXFRM_DESC_LEVEL4     0x00000800 /* if desc order for level4 */

#define MY_STRXFRM_DESC_LEVEL5     0x00001000 /* if desc order for level5 */

#define MY_STRXFRM_DESC_LEVEL6     0x00002000 /* if desc order for level6 */

#define MY_STRXFRM_DESC_SHIFT      8

#define MY_STRXFRM_UNUSED_00004000 0x00004000 /* for future extensions     */

#define MY_STRXFRM_UNUSED_00008000 0x00008000 /* for future extensions     */

#define MY_STRXFRM_REVERSE_LEVEL1  0x00010000 /* if reverse order for level1 */

#define MY_STRXFRM_REVERSE_LEVEL2  0x00020000 /* if reverse order for level2 */

#define MY_STRXFRM_REVERSE_LEVEL3  0x00040000 /* if reverse order for level3 */

#define MY_STRXFRM_REVERSE_LEVEL4  0x00080000 /* if reverse order for level4 */

#define MY_STRXFRM_REVERSE_LEVEL5  0x00100000 /* if reverse order for level5 */

#define MY_STRXFRM_REVERSE_LEVEL6  0x00200000 /* if reverse order for level6 */

#define MY_STRXFRM_REVERSE_SHIFT   16

typedef struct my_uni_idx_st

{

  uint16_t from;

  uint16_t to;

  unsigned char  *tab;

} MY_UNI_IDX;

typedef struct

{

  uint32_t beg;

  uint32_t end;

  uint32_t mb_len;

} my_match_t;

enum my_lex_states

{

  MY_LEX_START, MY_LEX_CHAR, MY_LEX_IDENT,

  MY_LEX_IDENT_SEP, MY_LEX_IDENT_START,

  MY_LEX_REAL, MY_LEX_HEX_NUMBER, MY_LEX_BIN_NUMBER,

  MY_LEX_CMP_OP, MY_LEX_LONG_CMP_OP, MY_LEX_STRING, MY_LEX_COMMENT, MY_LEX_END,

  MY_LEX_OPERATOR_OR_IDENT, MY_LEX_NUMBER_IDENT, MY_LEX_INT_OR_REAL,

  MY_LEX_REAL_OR_POINT, MY_LEX_BOOL, MY_LEX_EOL, MY_LEX_ESCAPE,

  MY_LEX_LONG_COMMENT, MY_LEX_END_LONG_COMMENT, MY_LEX_SEMICOLON,

  MY_LEX_SET_VAR, MY_LEX_USER_END, MY_LEX_HOSTNAME, MY_LEX_SKIP,

  MY_LEX_USER_VARIABLE_DELIMITER, MY_LEX_SYSTEM_VAR,

  MY_LEX_IDENT_OR_KEYWORD,

  MY_LEX_IDENT_OR_HEX, MY_LEX_IDENT_OR_BIN,

  MY_LEX_STRING_OR_DELIMITER

};

struct charset_info_st;

/* See strings/CHARSET_INFO.txt for information about this structure  */

typedef struct my_collation_handler_st

{

  bool (*init)(struct charset_info_st *, unsigned char *(*alloc)(size_t));

  /* Collation routines */

  int     (*strnncoll)(const struct charset_info_st * const,

		       const unsigned char *, size_t, const unsigned char *, size_t, bool);

  int     (*strnncollsp)(const struct charset_info_st * const,

                         const unsigned char *, size_t, const unsigned char *, size_t,

                         bool diff_if_only_endspace_difference);

  size_t  (*strnxfrm)(const struct charset_info_st * const,

                      unsigned char *dst, size_t dstlen, uint32_t nweights,

                      const unsigned char *src, size_t srclen, uint32_t flags);

  size_t    (*strnxfrmlen)(const struct charset_info_st * const, size_t);

  bool (*like_range)(const struct charset_info_st * const,

                        const char *s, size_t s_length,

                        char escape, char w_one, char w_many,

                        size_t res_length,

                        char *min_str, char *max_str,

                        size_t *min_len, size_t *max_len);

  int     (*wildcmp)(const struct charset_info_st * const,

  		     const char *str,const char *str_end,

                     const char *wildstr,const char *wildend,

                     int escape,int w_one, int w_many);

  int  (*strcasecmp)(const struct charset_info_st * const, const char *, const char *);

  uint32_t (*instr)(const struct charset_info_st * const,

                const char *b, size_t b_length,

                const char *s, size_t s_length,

                my_match_t *match, uint32_t nmatch);

  /* Hash calculation */

  void (*hash_sort)(const struct charset_info_st *cs, const unsigned char *key, size_t len,

                    uint32_t *nr1, uint32_t *nr2);

  bool (*propagate)(const struct charset_info_st *cs, const unsigned char *str, size_t len);

} MY_COLLATION_HANDLER;

extern MY_COLLATION_HANDLER my_collation_mb_bin_handler;

extern MY_COLLATION_HANDLER my_collation_8bit_simple_ci_handler;

extern MY_COLLATION_HANDLER my_collation_ucs2_uca_handler;

/* Some typedef to make it easy for C++ to make function pointers */

typedef int (*my_charset_conv_mb_wc)(const struct charset_info_st * const, my_wc_t *,

                                     const unsigned char *, const unsigned char *);

typedef int (*my_charset_conv_wc_mb)(const struct charset_info_st * const, my_wc_t,

                                     unsigned char *, unsigned char *);

typedef size_t (*my_charset_conv_case)(const struct charset_info_st * const,

                                       char *, size_t, char *, size_t);

/* See strings/CHARSET_INFO.txt about information on this structure  */

typedef struct my_charset_handler_st

{

  bool (*init)(struct charset_info_st *, unsigned char *(*alloc)(size_t));

  /* Multibyte routines */

  uint32_t    (*ismbchar)(const struct charset_info_st * const, const char *, const char *);

  uint32_t    (*mbcharlen)(const struct charset_info_st * const, uint32_t c);

  size_t  (*numchars)(const struct charset_info_st * const, const char *b, const char *e);

  size_t  (*charpos)(const struct charset_info_st * const, const char *b, const char *e,

                     size_t pos);

  size_t  (*well_formed_len)(const struct charset_info_st * const,

                             const char *b,const char *e,

                             size_t nchars, int *error);

  size_t  (*lengthsp)(const struct charset_info_st * const, const char *ptr, size_t length);

  size_t  (*numcells)(const struct charset_info_st * const, const char *b, const char *e);

  /* Unicode conversion */

  my_charset_conv_mb_wc mb_wc;

  my_charset_conv_wc_mb wc_mb;

  /* CTYPE scanner */

  int (*ctype)(const struct charset_info_st *cs, int *ctype,

               const unsigned char *s, const unsigned char *e);

  /* Functions for case and sort conversion */

  size_t  (*caseup_str)(const struct charset_info_st * const, char *);

  size_t  (*casedn_str)(const struct charset_info_st * const, char *);

  my_charset_conv_case caseup;

  my_charset_conv_case casedn;

  /* Charset dependant snprintf() */

  size_t (*snprintf)(const struct charset_info_st * const, char *to, size_t n,

                     const char *fmt,

                     ...)

#if defined(__GNUC__) && !defined(__INTEL_COMPILER)

                         __attribute__((format(printf, 4, 5)))

#endif

                         ;

  size_t (*long10_to_str)(const struct charset_info_st * const, char *to, size_t n,

                          int radix, long int val);

  size_t (*int64_t10_to_str)(const struct charset_info_st * const, char *to, size_t n,

                              int radix, int64_t val);

  void (*fill)(const struct charset_info_st * const, char *to, size_t len, int fill);

  /* String-to-number conversion routines */

  long        (*strntol)(const struct charset_info_st * const, const char *s, size_t l,

			 int base, char **e, int *err);

  unsigned long      (*strntoul)(const struct charset_info_st * const, const char *s, size_t l,

			 int base, char **e, int *err);

  int64_t   (*strntoll)(const struct charset_info_st * const, const char *s, size_t l,

			 int base, char **e, int *err);

  uint64_t (*strntoull)(const struct charset_info_st * const, const char *s, size_t l,

			 int base, char **e, int *err);

  double      (*strntod)(const struct charset_info_st * const, char *s, size_t l, char **e,

			 int *err);

  int64_t    (*strtoll10)(const struct charset_info_st *cs,

                           const char *nptr, char **endptr, int *error);

  uint64_t   (*strntoull10rnd)(const struct charset_info_st *cs,

                                const char *str, size_t length,

                                int unsigned_fl,

                                char **endptr, int *error);

  size_t        (*scan)(const struct charset_info_st * const, const char *b, const char *e,

                        int sq);

} MY_CHARSET_HANDLER;

extern MY_CHARSET_HANDLER my_charset_8bit_handler;

extern MY_CHARSET_HANDLER my_charset_ucs2_handler;

/* See strings/CHARSET_INFO.txt about information on this structure  */

typedef struct charset_info_st

{

  uint32_t      number;

  uint32_t      primary_number;

  uint32_t      binary_number;

  uint32_t      state;

  const char *csname;

  const char *name;

  const char *comment;

  const char *tailoring;

  unsigned char    *ctype;

  unsigned char    *to_lower;

  unsigned char    *to_upper;

  unsigned char    *sort_order;

  uint16_t   *contractions;

  uint16_t   **sort_order_big;

  uint16_t      *tab_to_uni;

  MY_UNI_IDX  *tab_from_uni;

  MY_UNICASE_INFO **caseinfo;

  unsigned char     *state_map;

  unsigned char     *ident_map;

  uint32_t      strxfrm_multiply;

  unsigned char     caseup_multiply;

  unsigned char     casedn_multiply;

  uint32_t      mbminlen;

  uint32_t      mbmaxlen;

  uint16_t    min_sort_char;

  uint16_t    max_sort_char; /* For LIKE optimization */

  unsigned char     pad_char;

  bool   escape_with_backslash_is_dangerous;

  unsigned char     levels_for_compare;

  unsigned char     levels_for_order;

  MY_CHARSET_HANDLER *cset;

  MY_COLLATION_HANDLER *coll;

} CHARSET_INFO;

#define ILLEGAL_CHARSET_INFO_NUMBER (UINT32_MAX)

extern DRIZZLED_API CHARSET_INFO my_charset_bin;

extern DRIZZLED_API CHARSET_INFO my_charset_utf8mb4_bin;

extern DRIZZLED_API CHARSET_INFO my_charset_utf8mb4_general_ci;

extern DRIZZLED_API CHARSET_INFO my_charset_utf8mb4_unicode_ci;

#define MY_UTF8MB4                 "utf8"

#define my_charset_utf8_general_ci ::drizzled::my_charset_utf8mb4_general_ci

#define my_charset_utf8_bin        ::drizzled::my_charset_utf8mb4_bin

/* declarations for simple charsets */

size_t my_strnxfrmlen_simple(const CHARSET_INFO * const, size_t);

extern int  my_strnncollsp_simple(const CHARSET_INFO * const, const unsigned char *, size_t,

                                  const unsigned char *, size_t,

                                  bool diff_if_only_endspace_difference);

extern size_t my_lengthsp_8bit(const CHARSET_INFO * const cs, const char *ptr, size_t length);

extern uint32_t my_instr_simple(const CHARSET_INFO * const,

                            const char *b, size_t b_length,

                            const char *s, size_t s_length,

                            my_match_t *match, uint32_t nmatch);

/* Functions for 8bit */

int my_mb_ctype_8bit(const CHARSET_INFO * const,int *, const unsigned char *,const unsigned char *);

int my_mb_ctype_mb(const CHARSET_INFO * const,int *, const unsigned char *,const unsigned char *);

size_t my_scan_8bit(const CHARSET_INFO * const cs, const char *b, const char *e, int sq);

size_t my_snprintf_8bit(const CHARSET_INFO * const, char *to, size_t n,

                        const char *fmt, ...)

  __attribute__((format(printf, 4, 5)));

long       my_strntol_8bit(const CHARSET_INFO * const, const char *s, size_t l, int base,

                           char **e, int *err);

unsigned long      my_strntoul_8bit(const CHARSET_INFO * const, const char *s, size_t l, int base,

			    char **e, int *err);

int64_t   my_strntoll_8bit(const CHARSET_INFO * const, const char *s, size_t l, int base,

			    char **e, int *err);

uint64_t my_strntoull_8bit(const CHARSET_INFO * const, const char *s, size_t l, int base,

			    char **e, int *err);

double      my_strntod_8bit(const CHARSET_INFO * const, char *s, size_t l,char **e,

			    int *err);

size_t my_long10_to_str_8bit(const CHARSET_INFO * const, char *to, size_t l, int radix,

                             long int val);

size_t my_int64_t10_to_str_8bit(const CHARSET_INFO * const, char *to, size_t l, int radix,

                                 int64_t val);

int64_t my_strtoll10_8bit(const CHARSET_INFO * const cs,

                           const char *nptr, char **endptr, int *error);

int64_t my_strtoll10_ucs2(CHARSET_INFO *cs,

                           const char *nptr, char **endptr, int *error);

uint64_t my_strntoull10rnd_8bit(const CHARSET_INFO * const cs,

                                 const char *str, size_t length, int

                                 unsigned_fl, char **endptr, int *error);

uint64_t my_strntoull10rnd_ucs2(CHARSET_INFO *cs,

                                 const char *str, size_t length,

                                 int unsigned_fl, char **endptr, int *error);

void my_fill_8bit(const CHARSET_INFO * const cs, char* to, size_t l, int fill);

bool  my_like_range_simple(const CHARSET_INFO * const cs,

			      const char *ptr, size_t ptr_length,

			      char escape, char w_one, char w_many,

			      size_t res_length,

			      char *min_str, char *max_str,

			      size_t *min_length, size_t *max_length);

bool  my_like_range_mb(const CHARSET_INFO * const cs,

			  const char *ptr, size_t ptr_length,

			  char escape, char w_one, char w_many,

			  size_t res_length,

			  char *min_str, char *max_str,

			  size_t *min_length, size_t *max_length);

bool  my_like_range_ucs2(const CHARSET_INFO * const cs,

			    const char *ptr, size_t ptr_length,

			    char escape, char w_one, char w_many,

			    size_t res_length,

			    char *min_str, char *max_str,

			    size_t *min_length, size_t *max_length);

bool  my_like_range_utf16(const CHARSET_INFO * const cs,

			     const char *ptr, size_t ptr_length,

			     char escape, char w_one, char w_many,

			     size_t res_length,

			     char *min_str, char *max_str,

			     size_t *min_length, size_t *max_length);

bool  my_like_range_utf32(const CHARSET_INFO * const cs,

			     const char *ptr, size_t ptr_length,

			     char escape, char w_one, char w_many,

			     size_t res_length,

			     char *min_str, char *max_str,

			     size_t *min_length, size_t *max_length);

int my_wildcmp_8bit(const CHARSET_INFO * const,

		    const char *str,const char *str_end,

		    const char *wildstr,const char *wildend,

		    int escape, int w_one, int w_many);

int my_wildcmp_bin(const CHARSET_INFO * const,

		   const char *str,const char *str_end,

		   const char *wildstr,const char *wildend,

		   int escape, int w_one, int w_many);

size_t my_numchars_8bit(const CHARSET_INFO * const, const char *b, const char *e);

size_t my_numcells_8bit(const CHARSET_INFO * const, const char *b, const char *e);

size_t my_charpos_8bit(const CHARSET_INFO * const, const char *b, const char *e, size_t pos);

size_t my_well_formed_len_8bit(const CHARSET_INFO * const, const char *b, const char *e,

                             size_t pos, int *error);

typedef unsigned char *(*cs_alloc_func)(size_t);

bool my_coll_init_simple(CHARSET_INFO *cs, cs_alloc_func alloc);

bool my_cset_init_8bit(CHARSET_INFO *cs, cs_alloc_func alloc);

uint32_t my_mbcharlen_8bit(const CHARSET_INFO * const, uint32_t c);

/* Functions for multibyte charsets */

extern size_t my_caseup_str_mb(const CHARSET_INFO * const, char *);

extern size_t my_casedn_str_mb(const CHARSET_INFO * const, char *);

extern size_t my_caseup_mb(const CHARSET_INFO * const, char *src, size_t srclen,

                                         char *dst, size_t dstlen);

extern size_t my_casedn_mb(const CHARSET_INFO * const, char *src, size_t srclen,

                                         char *dst, size_t dstlen);

extern int my_strcasecmp_mb(const CHARSET_INFO * const  cs, const char *s, const char *t);

int my_wildcmp_mb(const CHARSET_INFO * const,

		  const char *str,const char *str_end,

		  const char *wildstr,const char *wildend,

		  int escape, int w_one, int w_many);

size_t my_numchars_mb(const CHARSET_INFO * const, const char *b, const char *e);

size_t my_numcells_mb(const CHARSET_INFO * const, const char *b, const char *e);

size_t my_charpos_mb(const CHARSET_INFO * const, const char *b, const char *e, size_t pos);

size_t my_well_formed_len_mb(const CHARSET_INFO * const, const char *b, const char *e,

                             size_t pos, int *error);

uint32_t my_instr_mb(const CHARSET_INFO * const,

                 const char *b, size_t b_length,

                 const char *s, size_t s_length,

                 my_match_t *match, uint32_t nmatch);

int my_strnncoll_mb_bin(const CHARSET_INFO * const  cs,

                        const unsigned char *s, size_t slen,

                        const unsigned char *t, size_t tlen,

                        bool t_is_prefix);

int my_strnncollsp_mb_bin(const CHARSET_INFO * const cs,

                          const unsigned char *a, size_t a_length,

                          const unsigned char *b, size_t b_length,

                          bool diff_if_only_endspace_difference);

int my_wildcmp_mb_bin(const CHARSET_INFO * const cs,

                      const char *str,const char *str_end,

                      const char *wildstr,const char *wildend,

                      int escape, int w_one, int w_many);

int my_strcasecmp_mb_bin(const CHARSET_INFO * const, const char *s, const char *t);

void my_hash_sort_mb_bin(const CHARSET_INFO * const,

                         const unsigned char *key, size_t len, uint32_t *nr1, uint32_t *nr2);

size_t my_strnxfrm_mb(const CHARSET_INFO * const,

                      unsigned char *dst, size_t dstlen, uint32_t nweights,

                      const unsigned char *src, size_t srclen, uint32_t flags);

int my_wildcmp_unicode(const CHARSET_INFO * const cs,

                       const char *str, const char *str_end,

                       const char *wildstr, const char *wildend,

                       int escape, int w_one, int w_many,

                       MY_UNICASE_INFO **weights);

extern bool my_parse_charset_xml(const char *bug, size_t len,

				    int (*add)(CHARSET_INFO *cs));

bool my_propagate_simple(const CHARSET_INFO * const cs, const unsigned char *str, size_t len);

bool my_propagate_complex(const CHARSET_INFO * const cs, const unsigned char *str, size_t len);

uint32_t my_strxfrm_flag_normalize(uint32_t flags, uint32_t nlevels);

void my_strxfrm_desc_and_reverse(unsigned char *str, unsigned char *strend,

                                 uint32_t flags, uint32_t level);

size_t my_strxfrm_pad_desc_and_reverse(const CHARSET_INFO * const cs,

                                       unsigned char *str, unsigned char *frmend, unsigned char *strend,

                                       uint32_t nweights, uint32_t flags, uint32_t level);

bool my_charset_is_ascii_compatible(const CHARSET_INFO * const cs);

/*

  Compare 0-terminated UTF8 strings.

  SYNOPSIS

    my_strcasecmp_utf8mb3()

    cs                  character set handler

    s                   First 0-terminated string to compare

    t                   Second 0-terminated string to compare

  IMPLEMENTATION

  RETURN

    - negative number if s < t

    - positive number if s > t

    - 0 is the strings are equal

*/

int

my_wc_mb_filename(const CHARSET_INFO * const,

                  my_wc_t wc, unsigned char *s, unsigned char *e);

int

my_mb_wc_filename(const CHARSET_INFO * const,

                  my_wc_t *pwc, const unsigned char *s, const unsigned char *e);

unsigned int my_ismbchar_utf8mb4(const CHARSET_INFO * const cs,                                  const char *b, const char *e);

unsigned int my_mbcharlen_utf8mb4(const CHARSET_INFO * const, uint32_t c);

size_t my_strnxfrmlen_utf8mb4(const CHARSET_INFO * const, size_t len);

size_t

my_strnxfrm_utf8mb4(const CHARSET_INFO * const cs,

                    unsigned char *dst, size_t dstlen, uint32_t nweights,

                    const unsigned char *src, size_t srclen, uint32_t flags);

int

my_wildcmp_utf8mb4(const CHARSET_INFO * const cs,

                   const char *str, const char *strend,

                   const char *wildstr, const char *wildend,

                   int escape, int w_one, int w_many);

int

my_strnncollsp_utf8mb4(const CHARSET_INFO * const cs,

                       const unsigned char *s, size_t slen,

                       const unsigned char *t, size_t tlen,

                       bool diff_if_only_endspace_difference);

int my_strcasecmp_utf8mb4(const CHARSET_INFO * const cs,

                          const char *s, const char *t);

int

my_strnncoll_utf8mb4(const CHARSET_INFO * const cs,

                     const unsigned char *s, size_t slen,

                     const unsigned char *t, size_t tlen,

                     bool t_is_prefix);

int

my_mb_wc_utf8mb4(const CHARSET_INFO * const cs,

                 my_wc_t * pwc, const unsigned char *s, const unsigned char *e);

int

my_wc_mb_utf8mb4(const CHARSET_INFO * const cs,

                 my_wc_t wc, unsigned char *r, unsigned char *e);

size_t my_caseup_str_utf8mb4(const CHARSET_INFO * const cs, char *src);

size_t my_casedn_str_utf8mb4(const CHARSET_INFO * const cs, char *src);

size_t

my_caseup_utf8mb4(const CHARSET_INFO * const cs, char *src, size_t srclen,