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27025221fe
strings/json_lib.c added as a JSON library.
SQL frunction added with sql/item_jsonfunc.h/cc
119 lines
3.4 KiB
C++
119 lines
3.4 KiB
C++
#ifndef ITEM_XMLFUNC_INCLUDED
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#define ITEM_XMLFUNC_INCLUDED
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/* Copyright (c) 2000-2007 MySQL AB, 2009 Sun Microsystems, Inc.
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Use is subject to license terms.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; version 2 of the License.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
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/* This file defines all XML functions */
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typedef struct my_xml_node_st MY_XML_NODE;
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class Item_xml_str_func: public Item_str_func
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{
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protected:
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/*
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A helper class to store raw and parsed XML.
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*/
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class XML
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{
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bool m_cached;
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String *m_raw_ptr; // Pointer to text representation
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String m_raw_buf; // Cached text representation
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String m_parsed_buf; // Array of MY_XML_NODEs, pointing to raw_buffer
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bool parse();
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void reset()
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{
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m_cached= false;
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m_raw_ptr= (String *) 0;
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}
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public:
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XML() { reset(); }
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void set_charset(CHARSET_INFO *cs) { m_parsed_buf.set_charset(cs); }
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String *raw() { return m_raw_ptr; }
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String *parsed() { return &m_parsed_buf; }
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const MY_XML_NODE *node(uint idx);
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bool cached() { return m_cached; }
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bool parse(String *raw, bool cache);
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bool parse(Item *item, bool cache)
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{
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String *res;
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if (!(res= item->val_str(&m_raw_buf)))
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{
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m_raw_ptr= (String *) 0;
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m_cached= cache;
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return true;
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}
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return parse(res, cache);
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}
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};
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Item *nodeset_func;
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XML xml;
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bool get_xml(XML *xml_arg, bool cache= false)
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{
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if (!cache && xml_arg->cached())
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return xml_arg->raw() == 0;
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return xml_arg->parse(args[0], cache);
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}
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public:
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Item_xml_str_func(THD *thd, Item *a, Item *b): Item_str_func(thd, a, b)
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{
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maybe_null= TRUE;
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}
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Item_xml_str_func(THD *thd, Item *a, Item *b, Item *c):
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Item_str_func(thd, a, b, c)
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{
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maybe_null= TRUE;
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}
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bool fix_fields(THD *thd, Item **ref);
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void fix_length_and_dec();
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bool const_item() const
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{
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return const_item_cache && (!nodeset_func || nodeset_func->const_item());
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}
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};
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class Item_func_xml_extractvalue: public Item_xml_str_func
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{
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public:
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Item_func_xml_extractvalue(THD *thd, Item *a, Item *b):
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Item_xml_str_func(thd, a, b) {}
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const char *func_name() const { return "extractvalue"; }
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String *val_str(String *);
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Item *get_copy(THD *thd, MEM_ROOT *mem_root)
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{ return get_item_copy<Item_func_xml_extractvalue>(thd, mem_root, this); }
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};
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class Item_func_xml_update: public Item_xml_str_func
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{
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String tmp_value2, tmp_value3;
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bool collect_result(String *str,
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const MY_XML_NODE *cut,
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const String *replace);
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public:
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Item_func_xml_update(THD *thd, Item *a, Item *b, Item *c):
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Item_xml_str_func(thd, a, b, c) {}
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const char *func_name() const { return "updatexml"; }
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String *val_str(String *);
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Item *get_copy(THD *thd, MEM_ROOT *mem_root)
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{ return get_item_copy<Item_func_xml_update>(thd, mem_root, this); }
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};
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#endif /* ITEM_XMLFUNC_INCLUDED */
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