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https://github.com/netfun2000/lcd4linux.git
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6d5d1055ea
git-svn-id: https://ssl.bulix.org/svn/lcd4linux/trunk@840 3ae390bd-cb1e-0410-b409-cd5a39f66f1f
64 lines
1.7 KiB
C
64 lines
1.7 KiB
C
/* $Id$
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* $URL$
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*
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* expression evaluation
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*
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* Copyright (C) 2003 Michael Reinelt <michael@reinelt.co.at>
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* Copyright (C) 2004 The LCD4Linux Team <lcd4linux-devel@users.sourceforge.net>
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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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#ifndef _EVALUATOR_H_
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#define _EVALUATOR_H_
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/* RESULT bitmask */
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#define R_NUMBER 1
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#define R_STRING 2
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typedef struct {
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int type;
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int size;
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double number;
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char *string;
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} RESULT;
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int SetVariable(const char *name, RESULT * value);
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int SetVariableNumeric(const char *name, const double value);
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int SetVariableString(const char *name, const char *value);
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int AddFunction(const char *name, const int argc, void (*func) ());
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void DeleteVariables(void);
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void DeleteFunctions(void);
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void DelResult(RESULT * result);
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RESULT *SetResult(RESULT ** result, const int type, const void *value);
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RESULT *CopyResult(RESULT ** result, RESULT * value);
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double R2N(RESULT * result);
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char *R2S(RESULT * result);
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int Compile(const char *expression, void **tree);
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int Eval(void *tree, RESULT * result);
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void DelTree(void *tree);
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#endif
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