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

mysql/src/5.1-dbg/sql/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 786 of file sql_string.cc.

References charset_info_st::cset, e, int(), my_charset_handler_st::mb_wc, MY_CS_ILSEQ, MY_CS_ILUNI, MY_CS_TOOSMALL, my_wc_t, and my_charset_handler_st::wc_mb.

00789 {
00790   int         cnvres;
00791   my_wc_t     wc;
00792   const uchar *from_end= (const uchar*) from+from_length;
00793   char *to_start= to;
00794   uchar *to_end= (uchar*) to+to_length;
00795   int (*mb_wc)(struct charset_info_st *, my_wc_t *, const uchar *,
00796                const uchar *) = from_cs->cset->mb_wc;
00797   int (*wc_mb)(struct charset_info_st *, my_wc_t, uchar *s, uchar *e)=
00798     to_cs->cset->wc_mb;
00799   uint error_count= 0;
00800 
00801   while (1)
00802   {
00803     if ((cnvres= (*mb_wc)(from_cs, &wc, (uchar*) from,
00804                                       from_end)) > 0)
00805       from+= cnvres;
00806     else if (cnvres == MY_CS_ILSEQ)
00807     {
00808       error_count++;
00809       from++;
00810       wc= '?';
00811     }
00812     else if (cnvres > MY_CS_TOOSMALL)
00813     {
00814       /*
00815         A correct multibyte sequence detected
00816         But it doesn't have Unicode mapping.
00817       */
00818       error_count++;
00819       from+= (-cnvres);
00820       wc= '?';
00821     }
00822     else
00823       break;  // Not enough characters
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 744 of file sql_string.cc.

References from, memcpy, min, and to.

00745 {
00746   if (from->Alloced_length >= from_length)
00747     return from;
00748   if (from->alloced || !to || from == to)
00749   {
00750     (void) from->realloc(from_length);
00751     return from;
00752   }
00753   if (to->realloc(from_length))
00754     return from;                                // Actually an error
00755   if ((to->str_length=min(from->str_length,from_length)))
00756     memcpy(to->Ptr,from->Ptr,to->str_length);
00757   to->str_charset=from->str_charset;
00758   return to;
00759 }

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

Definition at line 710 of file sql_string.cc.

References charset_info_st::coll, String::length(), String::ptr(), and my_collation_handler_st::strnncollsp.

00711 {
00712  return cs->coll->strnncollsp(cs,
00713                               (uchar *) s->ptr(),s->length(),
00714                               (uchar *) t->ptr(),t->length(), 0);
00715 }

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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 736 of file sql_string.cc.

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

00737 {
00738   uint32 s_len=s->length(),t_len=t->length(),len=min(s_len,t_len);
00739   int cmp= memcmp(s->ptr(), t->ptr(), len);
00740   return (cmp) ? cmp : (int) (s_len - t_len);
00741 }

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Generated on Sat Sep 9 01:01:52 2006 for MySQL 5.1 by

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The world's most popular open source database

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

Functions

Function Documentation