/* 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: explicit 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 */