MySQL 5.1: mysql/src/5.1-dbg/client/sql_string.cc File Reference

mysql/src/5.1-dbg/client/sql_string.cc File Reference

#include <my_global.h>
#include <my_sys.h>
#include <m_string.h>
#include <m_ctype.h>
#include "sql_string.h"

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Functions
gptr	sql_alloc (unsigned size)
void	sql_element_free (void *ptr)
int	sortcmp (const String s, const String t, CHARSET_INFO *cs)
int	stringcmp (const String s, const String t)
String *	copy_if_not_alloced (String to, String from, uint32 from_length)
uint32	copy_and_convert (char to, uint32 to_length, CHARSET_INFO to_cs, const char from, uint32 from_length, CHARSET_INFO from_cs, uint *errors)

Function Documentation

uint32 copy_and_convert	(	char *	to,
		uint32	to_length,
		CHARSET_INFO *	to_cs,
		const char *	from,
		uint32	from_length,
		CHARSET_INFO *	from_cs,
		uint *	errors
	)

Definition at line 796 of file sql_string.cc.

Referenced by String::append(), check_connection(), String::copy(), dispatch_command(), Item_func_like::fix_fields(), get_dynamic_sql_string(), plugin_dl_add(), and sql_strmake_with_convert().

00799 {
00800   int         cnvres;
00801   my_wc_t     wc;
00802   const uchar *from_end= (const uchar*) from+from_length;
00803   char *to_start= to;
00804   uchar *to_end= (uchar*) to+to_length;
00805   int (*mb_wc)(struct charset_info_st *, my_wc_t *, const uchar *,
00806                const uchar *) = from_cs->cset->mb_wc;
00807   int (*wc_mb)(struct charset_info_st *, my_wc_t, uchar *s, uchar *e)=
00808     to_cs->cset->wc_mb;
00809   uint error_count= 0;
00810 
00811   while (1)
00812   {
00813     if ((cnvres= (*mb_wc)(from_cs, &wc, (uchar*) from,
00814                                       from_end)) > 0)
00815       from+= cnvres;
00816     else if (cnvres == MY_CS_ILSEQ)
00817     {
00818       error_count++;
00819       from++;
00820       wc= '?';
00821     }
00822     else
00823       break;                                    // Impossible char.
00824 
00825 outp:
00826     if ((cnvres= (*wc_mb)(to_cs, wc, (uchar*) to, to_end)) > 0)
00827       to+= cnvres;
00828     else if (cnvres == MY_CS_ILUNI && wc != '?')
00829     {
00830       error_count++;
00831       wc= '?';
00832       goto outp;
00833     }
00834     else
00835       break;
00836   }
00837   *errors= error_count;
00838   return (uint32) (to - to_start);
00839 }

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String* copy_if_not_alloced	(	String *	to,
		String *	from,
		uint32	from_length
	)

Definition at line 754 of file sql_string.cc.

Referenced by Item_func_format::val_str(), Item_func_decode::val_str(), Item_func_encode::val_str(), Item_str_conv::val_str(), Item_func_insert::val_str(), and Item_func_replace::val_str().

00755 {
00756   if (from->Alloced_length >= from_length)
00757     return from;
00758   if (from->alloced || !to || from == to)
00759   {
00760     (void) from->realloc(from_length);
00761     return from;
00762   }
00763   if (to->realloc(from_length))
00764     return from;                                // Actually an error
00765   if ((to->str_length=min(from->str_length,from_length)))
00766     memcpy(to->Ptr,from->Ptr,to->str_length);
00767   to->str_charset=from->str_charset;
00768   return to;
00769 }

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int sortcmp	(	const String *	s,
		const String *	t,
		CHARSET_INFO *	cs
	)

Definition at line 720 of file sql_string.cc.

Referenced by field_str::add(), Item_sum_max::add(), Item_sum_min::add(), cmp_item_sort_string::cmp(), Cached_item_str::cmp(), cmp_item_sort_string_in_static::compare(), cmp_item_sort_string::compare(), Arg_comparator::compare_e_string(), Arg_comparator::compare_string(), Item_hex_string::eq(), Item_param::eq(), Item_string::eq(), Item_func_case::find_item(), Item_sum_hybrid::min_max_update_str_field(), sortcmp2(), Item_func_field::val_int(), Item_func_between::val_int(), Item_func_strcmp::val_int(), and Item_func_min_max::val_str().

00721 {
00722  return cs->coll->strnncollsp(cs,
00723                               (unsigned char *) s->ptr(),s->length(),
00724                               (unsigned char *) t->ptr(),t->length(), 0);
00725 }

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gptr sql_alloc ( unsigned size )

void sql_element_free ( void * ptr )

int stringcmp	(	const String *	s,
		const String *	t
	)

Definition at line 746 of file sql_string.cc.

References cmp, int(), String::length(), memcmp(), min, and String::ptr().

Referenced by Arg_comparator::compare_e_binary_string(), Item_hex_string::eq(), Item_param::eq(), Item_string::eq(), and field_is_equal_to_item().

00747 {
00748   uint32 s_len=s->length(),t_len=t->length(),len=min(s_len,t_len);
00749   int cmp= memcmp(s->ptr(), t->ptr(), len);
00750   return (cmp) ? cmp : (int) (s_len - t_len);
00751 }

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Generated on Sat Sep 9 01:01:51 2006 for MySQL 5.1 by

1.4.7

mysql/src/5.1-dbg/client/sql_string.cc File Reference

Functions

Function Documentation