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019c4cc3d6
added %y tokens to make the Evaluator useable git-svn-id: https://ssl.bulix.org/svn/lcd4linux/trunk@286 3ae390bd-cb1e-0410-b409-cd5a39f66f1f
85 lines
2.1 KiB
C
85 lines
2.1 KiB
C
/* $Id: expr.c,v 1.1 2004/01/05 11:57:38 reinelt Exp $
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*
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* expr ('y*') functions
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* This is only a workaround to make the Evaluator usable until
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* it's fully integrated into lcd4linux.
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*
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* Copyright 2004 Michael Reinelt <reinelt@eunet.at>
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*
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* This file is part of LCD4Linux.
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*
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* LCD4Linux is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* LCD4Linux 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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*
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* $Log: expr.c,v $
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* Revision 1.1 2004/01/05 11:57:38 reinelt
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* added %y tokens to make the Evaluator useable
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*
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <time.h>
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#include <ctype.h>
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#include <errno.h>
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#define IN_EXPR
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#include "expr.h"
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#include "plugin.h"
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#include "debug.h"
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#include "cfg.h"
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int Expr(int index, char result[EXPR_TXT_LEN], double *val)
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{
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RESULT Result = {0, 0.0, NULL};
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static int errs[EXPRS+1];
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char *expression;
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char yn[4];
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if (index < 0 || index > EXPRS)
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return -1;
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if (errs[index])
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return -1;
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sprintf(yn, "y%d", index);
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expression = cfg_get(yn,NULL);
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if (!expression || !*expression) {
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error("Empty expression for 'y%d'", index);
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errs[index]++;
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return -1;
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}
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Eval(expression, &Result);
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strcpy(result, R2S(&Result));
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debug("%s: <%s> = '%s'",yn, expression, result);
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if (isdigit(*result)) {
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double max, min;
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*val = atof(result);
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sprintf(yn, "Max_y%d", index);
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max = atof(cfg_get(yn,"100"));
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sprintf(yn, "Min_y%d", index);
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min = atof(cfg_get(yn,"0"));
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if (max != min)
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*val = (*val - min)/(max - min);
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}
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return 0;
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}
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