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7d5c275cb8
big patch from Martin: - reuse filehandles - memory leaks fixed - earlier busy-flag checking with HD44780 - reuse memory for strings in RESULT and hash - netdev_fast to wavid time-consuming regex git-svn-id: https://ssl.bulix.org/svn/lcd4linux/trunk@393 3ae390bd-cb1e-0410-b409-cd5a39f66f1f
99 lines
2.9 KiB
C
99 lines
2.9 KiB
C
/* $Id: evaluator.h,v 1.6 2004/03/11 06:39:59 reinelt Exp $
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*
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* expression evaluation
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*
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* Copyright 1999, 2000 Michael Reinelt <reinelt@eunet.at>
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* Copyright 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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* $Log: evaluator.h,v $
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* Revision 1.6 2004/03/11 06:39:59 reinelt
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* big patch from Martin:
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* - reuse filehandles
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* - memory leaks fixed
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* - earlier busy-flag checking with HD44780
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* - reuse memory for strings in RESULT and hash
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* - netdev_fast to wavid time-consuming regex
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*
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* Revision 1.5 2004/03/06 20:31:16 reinelt
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* Complete rewrite of the evaluator to get rid of the code
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* from mark Morley (because of license issues).
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* The new Evaluator does a pre-compile of expressions, and
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* stores them in trees. Therefore it should be reasonable faster...
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*
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* Revision 1.4 2004/03/03 03:47:04 reinelt
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* big patch from Martin Hejl:
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* - use qprintf() where appropriate
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* - save CPU cycles on gettimeofday()
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* - add quit() functions to free allocated memory
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* - fixed lots of memory leaks
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*
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* Revision 1.3 2004/01/12 03:51:01 reinelt
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* evaluating the 'Variables' section in the config file
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*
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* Revision 1.2 2003/10/11 06:01:53 reinelt
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*
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* renamed expression.{c,h} to client.{c,h}
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* added config file client
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* new functions 'AddNumericVariable()' and 'AddStringVariable()'
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* new parameter '-i' for interactive mode
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*
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* Revision 1.1 2003/10/06 04:34:06 reinelt
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* expression evaluator added
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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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double number;
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int length;
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char *string;
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} RESULT;
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int SetVariable (char *name, RESULT *value);
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int SetVariableNumeric (char *name, double value);
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int SetVariableString (char *name, char *value);
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int AddFunction (char *name, 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, int type, void *value);
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double R2N (RESULT *result);
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char* R2S (RESULT *result);
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int Compile (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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