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