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MySQL 5.1: Item_func_char Class Reference

Item_func_char Class Reference

#include <item_strfunc.h>

Inheritance diagram for Item_func_char:

[legend]Collaboration diagram for Item_func_char:

[legend]List of all members.


Public Member Functions
	Item_func_char (List< Item > &list)
	Item_func_char (List< Item > &list, CHARSET_INFO *cs)
String *	val_str (String *)
void	fix_length_and_dec ()
const char *	func_name () const

Detailed Description

Definition at line 517 of file item_strfunc.h.

Constructor & Destructor Documentation

Item_func_char::Item_func_char ( List< Item > & list ) [inline]

Definition at line 520 of file item_strfunc.h.

References Item::collation, my_charset_bin, and DTCollation::set().

00520                                    :Item_str_func(list)
00521   { collation.set(&my_charset_bin); }

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Item_func_char::Item_func_char	(	List< Item > &	list,
		CHARSET_INFO *	cs
	)			`[inline]`

Definition at line 522 of file item_strfunc.h.

References Item::collation, and DTCollation::set().

00522                                                      :Item_str_func(list)
00523   { collation.set(cs); }

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Member Function Documentation

void Item_func_char::fix_length_and_dec ( ) [inline, virtual]

Implements Item_result_field.

Definition at line 525 of file item_strfunc.h.

References Item_func::arg_count, DTCollation::collation, Item::collation, Item::max_length, Item::maybe_null, and charset_info_st::mbmaxlen.

00526   { 
00527     maybe_null=0;
00528     max_length=arg_count * collation.collation->mbmaxlen;
00529   }

const char* Item_func_char::func_name ( ) const [inline, virtual]

Implements Item_func.

Definition at line 530 of file item_strfunc.h.

00530 { return "char"; }

String * Item_func_char::val_str ( String * ) [virtual]

Implements Item.

Definition at line 2067 of file item_strfunc.cc.

References String::append(), Item_func::arg_count, Item_func::args, Item_str_func::check_well_formed_result(), DTCollation::collation, Item::collation, DBUG_ASSERT, Item::fixed, String::length(), Item::null_value, String::realloc(), String::set_charset(), and Item_str_func::val_int().

02068 {
02069   DBUG_ASSERT(fixed == 1);
02070   str->length(0);
02071   for (uint i=0 ; i < arg_count ; i++)
02072   {
02073     int32 num=(int32) args[i]->val_int();
02074     if (!args[i]->null_value)
02075     {
02076       if (num&0xFF000000L) {
02077         str->append((char)(num>>24));
02078         goto b2;
02079       } else if (num&0xFF0000L) {
02080     b2:        str->append((char)(num>>16));
02081         goto b1;
02082       } else if (num&0xFF00L) {
02083     b1:        str->append((char)(num>>8));
02084       }
02085       str->append((char) num);
02086     }
02087   }
02088   str->set_charset(collation.collation);
02089   str->realloc(str->length());                  // Add end 0 (for Purify)
02090   return check_well_formed_result(str);
02091 }

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The documentation for this class was generated from the following files:

mysql/src/5.1-dbg/sql/item_strfunc.h
mysql/src/5.1-dbg/sql/item_strfunc.cc

Generated on Sat Sep 9 21:27:02 2006 for MySQL 5.1 by

1.4.7

The world's most popular open source database

Item_func_char Class Reference

Public Member Functions

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation