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| /* Copyright (c) 2000, 2019, Oracle and/or its affiliates. | ||
| Copyright (c) 2010, 2024, 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 02110-1335 USA */ | ||
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| #ifndef LEX_IDENT_CLI | ||
| #define LEX_IDENT_CLI | ||
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| #include "my_global.h" | ||
| #include "m_ctype.h" | ||
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| /** | ||
| A string with metadata. Usually points to a string in the client | ||
| character set, but unlike Lex_ident_cli_st (see below) it does not | ||
| necessarily point to a query fragment. It can also point to memory | ||
| of other kinds (e.g. an additional THD allocated memory buffer | ||
| not overlapping with the current query text). | ||
| We'll add more flags here eventually, to know if the string has, e.g.: | ||
| - multi-byte characters | ||
| - bad byte sequences | ||
| - backslash escapes: 'a\nb' | ||
| and reuse the original query fragments instead of making the string | ||
| copy too early, in Lex_input_stream::get_text(). | ||
| This will allow to avoid unnecessary copying, as well as | ||
| create more optimal Item types in sql_yacc.yy | ||
| */ | ||
| struct Lex_string_with_metadata_st: public LEX_CSTRING | ||
| { | ||
| private: | ||
| bool m_is_8bit; // True if the string has 8bit characters | ||
| char m_quote; // Quote character, or 0 if not quoted | ||
| public: | ||
| void set_8bit(bool is_8bit) { m_is_8bit= is_8bit; } | ||
| void set_metadata(bool is_8bit, char quote) | ||
| { | ||
| m_is_8bit= is_8bit; | ||
| m_quote= quote; | ||
| } | ||
| void set(const char *s, size_t len, bool is_8bit, char quote) | ||
| { | ||
| str= s; | ||
| length= len; | ||
| set_metadata(is_8bit, quote); | ||
| } | ||
| void set(const LEX_CSTRING *s, bool is_8bit, char quote) | ||
| { | ||
| ((LEX_CSTRING &)*this)= *s; | ||
| set_metadata(is_8bit, quote); | ||
| } | ||
| bool is_8bit() const { return m_is_8bit; } | ||
| bool is_quoted() const { return m_quote != '\0'; } | ||
| char quote() const { return m_quote; } | ||
| // Get string repertoire by the 8-bit flag and the character set | ||
| my_repertoire_t repertoire(CHARSET_INFO *cs) const | ||
| { | ||
| return !m_is_8bit && my_charset_is_ascii_based(cs) ? | ||
| MY_REPERTOIRE_ASCII : MY_REPERTOIRE_UNICODE30; | ||
| } | ||
| // Get string repertoire by the 8-bit flag, for ASCII-based character sets | ||
| my_repertoire_t repertoire() const | ||
| { | ||
| return !m_is_8bit ? MY_REPERTOIRE_ASCII : MY_REPERTOIRE_UNICODE30; | ||
| } | ||
| }; | ||
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| /* | ||
| Used to store identifiers in the client character set. | ||
| Points to a query fragment. | ||
| */ | ||
| struct Lex_ident_cli_st: public Lex_string_with_metadata_st | ||
| { | ||
| public: | ||
| void set_keyword(const char *s, size_t len) | ||
| { | ||
| set(s, len, false, '\0'); | ||
| } | ||
| void set_ident(const char *s, size_t len, bool is_8bit) | ||
| { | ||
| set(s, len, is_8bit, '\0'); | ||
| } | ||
| void set_ident_quoted(const char *s, size_t len, bool is_8bit, char quote) | ||
| { | ||
| set(s, len, is_8bit, quote); | ||
| } | ||
| void set_unquoted(const LEX_CSTRING *s, bool is_8bit) | ||
| { | ||
| set(s, is_8bit, '\0'); | ||
| } | ||
| const char *pos() const { return str - is_quoted(); } | ||
| const char *end() const { return str + length + is_quoted(); } | ||
| }; | ||
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| class Lex_ident_cli: public Lex_ident_cli_st | ||
| { | ||
| public: | ||
| Lex_ident_cli(const LEX_CSTRING *s, bool is_8bit) | ||
| { | ||
| set_unquoted(s, is_8bit); | ||
| } | ||
| Lex_ident_cli(const char *s, size_t len) | ||
| { | ||
| set_ident(s, len, false); | ||
| } | ||
| }; | ||
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| #endif // LEX_IDENT_CLI |
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| @@ -0,0 +1,75 @@ | ||
| /* Copyright (c) 2000, 2019, Oracle and/or its affiliates. | ||
| Copyright (c) 2010, 2024, 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 02110-1335 USA */ | ||
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| #ifndef LEX_IDENT_SYS | ||
| #define LEX_IDENT_SYS | ||
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| #include "lex_ident_cli.h" | ||
| #include "sql_alloc.h" | ||
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| extern "C" MYSQL_PLUGIN_IMPORT CHARSET_INFO *system_charset_info; | ||
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| struct Lex_ident_sys_st: public LEX_CSTRING, Sql_alloc | ||
| { | ||
| public: | ||
| bool copy_ident_cli(const THD *thd, const Lex_ident_cli_st *str); | ||
| bool copy_keyword(const THD *thd, const Lex_ident_cli_st *str); | ||
| bool copy_sys(const THD *thd, const LEX_CSTRING *str); | ||
| bool convert(const THD *thd, const LEX_CSTRING *str, CHARSET_INFO *cs); | ||
| bool copy_or_convert(const THD *thd, const Lex_ident_cli_st *str, | ||
| CHARSET_INFO *cs); | ||
| bool is_null() const { return str == NULL; } | ||
| bool to_size_number(ulonglong *to) const; | ||
| void set_valid_utf8(const LEX_CSTRING *name) | ||
| { | ||
| DBUG_ASSERT(Well_formed_prefix(system_charset_info, name->str, | ||
| name->length).length() == name->length); | ||
| str= name->str ; length= name->length; | ||
| } | ||
| }; | ||
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| class Lex_ident_sys: public Lex_ident_sys_st | ||
| { | ||
| public: | ||
| Lex_ident_sys(const THD *thd, const Lex_ident_cli_st *str) | ||
| { | ||
| if (copy_ident_cli(thd, str)) | ||
| *this= Lex_ident_sys(); | ||
| } | ||
| Lex_ident_sys() | ||
| { | ||
| ((LEX_CSTRING &) *this)= {nullptr, 0}; | ||
| } | ||
| Lex_ident_sys(const char *name, size_t length) | ||
| { | ||
| LEX_CSTRING tmp= {name, length}; | ||
| set_valid_utf8(&tmp); | ||
| } | ||
| Lex_ident_sys(const THD *thd, const LEX_CSTRING *str) | ||
| { | ||
| set_valid_utf8(str); | ||
| } | ||
| Lex_ident_sys & operator=(const Lex_ident_sys_st &name) | ||
| { | ||
| Lex_ident_sys_st::operator=(name); | ||
| return *this; | ||
| } | ||
| }; | ||
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| #endif // LEX_IDENT_SYS |
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