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Optimization to use less memory.

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unknown 2004-06-10 19:10:21 +05:00
commit d8f0df52d3
18 changed files with 98 additions and 92 deletions
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24
mysys/charset.c
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@ -406,12 +406,21 @@ static void set_max_sort_char(CHARSET_INFO *cs)
}
static void init_state_maps(CHARSET_INFO *cs)
static my_bool init_state_maps(CHARSET_INFO *cs)
{
uint i;
uchar *state_map= cs->state_map;
uchar *ident_map= cs->ident_map;
uchar *state_map;
uchar *ident_map;
if (!(cs->state_map= (uchar*) my_once_alloc(256, MYF(MY_WME))))
return 1;
if (!(cs->ident_map= (uchar*) my_once_alloc(256, MYF(MY_WME))))
return 1;
state_map= cs->state_map;
ident_map= cs->ident_map;
/* Fill state_map with states to get a faster parser */
for (i=0; i < 256 ; i++)
{
@ -458,6 +467,7 @@ static void init_state_maps(CHARSET_INFO *cs)
state_map[(uchar)'x']= state_map[(uchar)'X']= (uchar) MY_LEX_IDENT_OR_HEX;
state_map[(uchar)'b']= state_map[(uchar)'b']= (uchar) MY_LEX_IDENT_OR_BIN;
state_map[(uchar)'n']= state_map[(uchar)'N']= (uchar) MY_LEX_IDENT_OR_NCHAR;
return 0;
}
@ -582,7 +592,8 @@ static int simple_cs_copy_data(CHARSET_INFO *to, CHARSET_INFO *from)
MY_CS_CTYPE_TABLE_SIZE,
MYF(MY_WME))))
goto err;
init_state_maps(to);
if (init_state_maps(to))
goto err;
}
if (from->to_lower)
if (!(to->to_lower= (uchar*) my_once_memdup((char*) from->to_lower,
@ -601,6 +612,8 @@ static int simple_cs_copy_data(CHARSET_INFO *to, CHARSET_INFO *from)
MY_CS_SORT_ORDER_TABLE_SIZE,
MYF(MY_WME))))
goto err;
set_max_sort_char(to);
}
if (from->tab_to_uni)
@ -1108,7 +1121,8 @@ static my_bool init_available_charsets(myf myflags)
{
set_max_sort_char(*cs);
if (cs[0]->ctype)
init_state_maps(*cs);
if (init_state_maps(*cs))
*cs= NULL;
}
}