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Edit File : lex_string.h \| Size : 3.97 KB
/* Copyright (c) 2018, MariaDB Corporation. 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 / #ifndef LEX_STRING_INCLUDED #define LEX_STRING_INCLUDED typedef struct st_mysql_const_lex_string LEX_CSTRING; class Lex_cstring : public LEX_CSTRING { public: Lex_cstring() { str= NULL; length= 0; } Lex_cstring(const LEX_CSTRING &str) { LEX_CSTRING::operator=(str); } Lex_cstring(const char _str, size_t _len) { str= _str; length= _len; } Lex_cstring(const char start, const char end) { DBUG_ASSERT(start <= end); str= start; length= end - start; } void set(const char _str, size_t _len) { str= _str; length= _len; } / Trim left white spaces. Assumes that there are no multi-bytes characters that can be considered white-space. / Lex_cstring ltrim_whitespace(CHARSET_INFO cs) const { DBUG_ASSERT(cs->mbminlen == 1); Lex_cstring str= this; while (str.length > 0 && my_isspace(cs, str.str[0])) { str.length--; str.str++; } return str; } / Trim right white spaces. Assumes that there are no multi-bytes characters that can be considered white-space. Also, assumes that the character set supports backward space parsing. / Lex_cstring rtrim_whitespace(CHARSET_INFO cs) const { DBUG_ASSERT(cs->mbminlen == 1); Lex_cstring str= this; while (str.length > 0 && my_isspace(cs, str.str[str.length - 1])) { str.length --; } return str; } / Trim all spaces. / Lex_cstring trim_whitespace(CHARSET_INFO cs) const { return ltrim_whitespace(cs).rtrim_whitespace(cs); } /* Trim all spaces and return the length of the leading space sequence. / Lex_cstring trim_whitespace(CHARSET_INFO cs, size_t prefix_length) const { Lex_cstring tmp= Lex_cstring(this).ltrim_whitespace(cs); if (prefix_length) prefix_length= tmp.str - str; return tmp.rtrim_whitespace(cs); } }; class Lex_cstring_strlen: public Lex_cstring { public: Lex_cstring_strlen(const char from) :Lex_cstring(from, from ? strlen(from) : 0) { } }; /* Functions to compare if two lex strings are equal / static inline bool lex_string_cmp(CHARSET_INFO charset, const LEX_CSTRING a, const LEX_CSTRING b) { return my_strcasecmp(charset, a->str, b->str); } /* Compare to LEX_CSTRING's and return 0 if equal / static inline bool cmp(const LEX_CSTRING a, const LEX_CSTRING b) { return a->length != b->length \|\| (a->length && memcmp(a->str, b->str, a->length)); } static inline bool cmp(const LEX_CSTRING a, const LEX_CSTRING b) { return a.length != b.length \|\| (a.length && memcmp(a.str, b.str, a.length)); } / Compare if two LEX_CSTRING are equal. Assumption is that character set is ASCII (like for plugin names) / static inline bool lex_string_eq(const LEX_CSTRING a, const LEX_CSTRING b) { if (a->length != b->length) return 0; / Different / return strcasecmp(a->str, b->str) == 0; } / To be used when calling lex_string_eq with STRING_WITH_LEN() as second argument / static inline bool lex_string_eq(const LEX_CSTRING a, const char b, size_t b_length) { if (a->length != b_length) return 0; / Different / return strcasecmp(a->str, b) == 0; } #endif / LEX_STRING_INCLUDED */ Back

Edit File : lex_string.h | Size : 3.97 KB

/*
   Copyright (c) 2018, MariaDB Corporation.

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 */

#ifndef LEX_STRING_INCLUDED
#define LEX_STRING_INCLUDED

typedef struct st_mysql_const_lex_string LEX_CSTRING;

class Lex_cstring : public LEX_CSTRING
{
  public:
  Lex_cstring()
  {
    str= NULL;
    length= 0;
  }
  Lex_cstring(const LEX_CSTRING &str)
  {
    LEX_CSTRING::operator=(str);
  }
  Lex_cstring(const char *_str, size_t _len)
  {
    str= _str;
    length= _len;
  }
  Lex_cstring(const char *start, const char *end)
  {
    DBUG_ASSERT(start <= end);
    str= start;
    length= end - start;
  }
  void set(const char *_str, size_t _len)
  {
    str= _str;
    length= _len;
  }

/*
    Trim left white spaces.
    Assumes that there are no multi-bytes characters
    that can be considered white-space.
  */
  Lex_cstring ltrim_whitespace(CHARSET_INFO *cs) const
  {
    DBUG_ASSERT(cs->mbminlen == 1);
    Lex_cstring str= *this;
    while (str.length > 0 && my_isspace(cs, str.str[0]))
    {
      str.length--;
      str.str++;
    }
    return str;
  }

/*
    Trim right white spaces.
    Assumes that there are no multi-bytes characters
    that can be considered white-space.
    Also, assumes that the character set supports backward space parsing.
  */
  Lex_cstring rtrim_whitespace(CHARSET_INFO *cs) const
  {
    DBUG_ASSERT(cs->mbminlen == 1);
    Lex_cstring str= *this;
    while (str.length > 0 && my_isspace(cs, str.str[str.length - 1]))
    {
      str.length --;
    }
    return str;
  }

/*
    Trim all spaces.
  */
  Lex_cstring trim_whitespace(CHARSET_INFO *cs) const
  {
    return ltrim_whitespace(cs).rtrim_whitespace(cs);
  }

/*
    Trim all spaces and return the length of the leading space sequence.
  */
  Lex_cstring trim_whitespace(CHARSET_INFO *cs, size_t *prefix_length) const
  {
    Lex_cstring tmp= Lex_cstring(*this).ltrim_whitespace(cs);
    if (prefix_length)
      *prefix_length= tmp.str - str;
    return tmp.rtrim_whitespace(cs);
  }

};

class Lex_cstring_strlen: public Lex_cstring
{
public:
  Lex_cstring_strlen(const char *from)
   :Lex_cstring(from, from ? strlen(from) : 0)
  { }
};

/* Functions to compare if two lex strings are equal */

static inline bool lex_string_cmp(CHARSET_INFO *charset, const LEX_CSTRING *a,
                                  const LEX_CSTRING *b)
{
  return my_strcasecmp(charset, a->str, b->str);
}

/*
  Compare to LEX_CSTRING's and return 0 if equal
*/

static inline bool cmp(const LEX_CSTRING *a, const LEX_CSTRING *b)
{
  return a->length != b->length ||
    (a->length && memcmp(a->str, b->str, a->length));
}
static inline bool cmp(const LEX_CSTRING a, const LEX_CSTRING b)
{
  return a.length != b.length || (a.length && memcmp(a.str, b.str, a.length));
}

/*
  Compare if two LEX_CSTRING are equal. Assumption is that
  character set is ASCII (like for plugin names)
*/

static inline bool lex_string_eq(const LEX_CSTRING *a, const LEX_CSTRING *b)
{
  if (a->length != b->length)
    return 0;                                   /* Different */
  return strcasecmp(a->str, b->str) == 0;
}

/*
  To be used when calling lex_string_eq with STRING_WITH_LEN() as second
  argument
*/

static inline bool lex_string_eq(const LEX_CSTRING *a, const char *b, size_t b_length)
{
  if (a->length != b_length)
    return 0;                                   /* Different */
  return strcasecmp(a->str, b) == 0;
}

#endif /* LEX_STRING_INCLUDED */

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