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/* Copyright (C) 2000 MySQL AB & MySQL Finland AB & TCX DataKonsult AB
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
MA 02111-1307, USA */
/* Allow use of the -O variable= option to set long variables */
#include "mysys_priv.h"
#include <m_string.h>
#include <m_ctype.h>
/* set all changeable variables */
void set_all_changeable_vars(CHANGEABLE_VAR *vars)
{
for ( ; vars->name ; vars++)
*vars->varptr= vars->def_value;
}
my_bool set_changeable_varval(const char* var, ulong val,
CHANGEABLE_VAR *vars)
{
char buffer[256];
sprintf( buffer, "%s=%lu", var, (unsigned long) val );
return set_changeable_var( buffer, vars );
}
my_bool set_changeable_var(my_string str,CHANGEABLE_VAR *vars)
{
char endchar;
my_string end;
DBUG_ENTER("set_changeable_var");
DBUG_PRINT("enter",("%s",str));
if (str)
{
if (!(end=strchr(str,'=')))
fprintf(stderr,"Can't find '=' in expression '%s' to option -O\n",str);
else
{
uint length,found_count=0;
CHANGEABLE_VAR *var,*found;
my_string var_end;
const char *name;
longlong num;
/* Skip end space from variable */
for (var_end=end ; end > str && isspace(var_end[-1]) ; var_end--) ;
length=(uint) (var_end-str);
/* Skip start space from argument */
for (end++ ; isspace(*end) ; end++) ;
for (var=vars,found=0 ; (name=var->name) ; var++)
{
if (!my_casecmp(name,str,length))
{
found=var; found_count++;
if (!name[length])
{
found_count=1;
break;
}
}
}
if (found_count == 0)
{
fprintf(stderr,"No variable match for: -O '%s'\n",str);
DBUG_RETURN(1);
}
if (found_count > 1)
{
fprintf(stderr,"Variable prefix '%*s' is not unique\n",length,str);
DBUG_RETURN(1);
}
num=strtoll(end, (char **)NULL, 10); endchar=strend(end)[-1];
if (endchar == 'k' || endchar == 'K')
num*=1024;
else if (endchar == 'm' || endchar == 'M')
num*=1024L*1024L;
else if (endchar == 'g' || endchar == 'G')
num*=1024L*1024L*1024L;
else if (!isdigit(endchar))
{
fprintf(stderr,"Unknown prefix used for variable value '%s'\n",str);
DBUG_RETURN(1);
}
if (num < (longlong) found->min_value)
num=(longlong) found->min_value;
else if (num > 0 && (ulonglong) num > (ulonglong) (ulong) found->max_value)
num=(longlong) (ulong) found->max_value;
num=((num- (longlong) found->sub_size) / (ulonglong) found->block_size);
(*found->varptr)= (long) (num*(ulonglong) found->block_size);
DBUG_RETURN(0);
}
}
DBUG_RETURN(1);
}
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