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MySQL 5.1: Item_func_conv Class Reference

Item_func_conv Class Reference

#include <item_strfunc.h>

Inheritance diagram for Item_func_conv:

[legend]Collaboration diagram for Item_func_conv:

[legend]List of all members.


Public Member Functions
	Item_func_conv (Item a, Item b, Item *c)
const char *	func_name () const
String *	val_str (String *)
void	fix_length_and_dec ()
bool	check_partition_func_processor (byte *bool_arg)

Detailed Description

Definition at line 571 of file item_strfunc.h.

Constructor & Destructor Documentation

Item_func_conv::Item_func_conv	(	Item *	a,
		Item *	b,
		Item *	c
	)			`[inline]`

Definition at line 574 of file item_strfunc.h.

00574 :Item_str_func(a,b,c) {}

Member Function Documentation

bool Item_func_conv::check_partition_func_processor ( byte * bool_arg ) [inline, virtual]

Reimplemented from Item.

Definition at line 582 of file item_strfunc.h.

00582 { return 0;}

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

Implements Item_result_field.

Definition at line 577 of file item_strfunc.h.

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

00578   {
00579     collation.set(default_charset());
00580     max_length= 64;
00581   }

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

Implements Item_func.

Definition at line 575 of file item_strfunc.h.

00575 { return "conv"; }

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

Implements Item.

Definition at line 2348 of file item_strfunc.cc.

References abs, Item_func::args, String::charset(), String::copy(), DBUG_ASSERT, Item::default_charset(), endptr, err, Item::fixed, int(), String::length(), longlong2str, my_empty_string(), my_strntoll, my_strntoull, Item::null_value, String::ptr(), Item::unsigned_flag, Item_str_func::val_int(), and Item::val_str().

02349 {
02350   DBUG_ASSERT(fixed == 1);
02351   String *res= args[0]->val_str(str);
02352   char *endptr,ans[65],*ptr;
02353   longlong dec;
02354   int from_base= (int) args[1]->val_int();
02355   int to_base= (int) args[2]->val_int();
02356   int err;
02357 
02358   if (args[0]->null_value || args[1]->null_value || args[2]->null_value ||
02359       abs(to_base) > 36 || abs(to_base) < 2 ||
02360       abs(from_base) > 36 || abs(from_base) < 2 || !(res->length()))
02361   {
02362     null_value=1;
02363     return 0;
02364   }
02365   null_value=0;
02366   unsigned_flag= !(from_base < 0);
02367   if (from_base < 0)
02368     dec= my_strntoll(res->charset(),res->ptr(),res->length(),-from_base,&endptr,&err);
02369   else
02370     dec= (longlong) my_strntoull(res->charset(),res->ptr(),res->length(),from_base,&endptr,&err);
02371   ptr= longlong2str(dec,ans,to_base);
02372   if (str->copy(ans,(uint32) (ptr-ans), default_charset()))
02373     return &my_empty_string;
02374   return str;
02375 }

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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 21:28:10 2006 for MySQL 5.1 by

1.4.7

The world's most popular open source database

Item_func_conv Class Reference

Public Member Functions

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation