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https://github.com/netfun2000/lcd4linux.git
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eff1e17fc3
git-svn-id: https://ssl.bulix.org/svn/lcd4linux/trunk@726 3ae390bd-cb1e-0410-b409-cd5a39f66f1f
125 lines
3.6 KiB
C
125 lines
3.6 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 <reinelt@eunet.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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* $Log: evaluator.h,v $
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* Revision 1.13 2006/08/13 09:53:10 reinelt
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* dynamic properties added (used by 'style' of text widget)
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*
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* Revision 1.12 2006/01/30 06:11:36 reinelt
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* changed Result->length to Result->size
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*
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* Revision 1.11 2005/05/08 04:32:44 reinelt
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* CodingStyle added and applied
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*
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* Revision 1.10 2005/01/18 06:30:23 reinelt
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* added (C) to all copyright statements
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*
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* Revision 1.9 2004/06/26 12:04:59 reinelt
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*
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* uh-oh... the last CVS log message messed up things a lot...
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*
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* Revision 1.8 2004/06/26 09:27:21 reinelt
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*
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* added '-W' to CFLAGS
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* changed all C++ comments to C ones
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* cleaned up a lot of signed/unsigned mistakes
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*
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* Revision 1.7 2004/06/20 10:09:56 reinelt
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*
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* 'const'ified the whole source
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*
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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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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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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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