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author | reinelt <reinelt@3ae390bd-cb1e-0410-b409-cd5a39f66f1f> | 2003-12-19 05:35:14 +0000 |
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committer | reinelt <reinelt@3ae390bd-cb1e-0410-b409-cd5a39f66f1f> | 2003-12-19 05:35:14 +0000 |
commit | c1c11bb955fc2ab80bb8356aa917ab1bda843ce7 (patch) | |
tree | aec740b39fa23917f7ba4ee95172f738d7ef8621 /plugin.c | |
parent | 6ace72e8fcfdca9f7d92816da58b204b6d2c7893 (diff) | |
download | lcd4linux-c1c11bb955fc2ab80bb8356aa917ab1bda843ce7.tar.gz |
[lcd4linux @ 2003-12-19 05:35:13 by reinelt]
renamed 'client' to 'plugin'
git-svn-id: https://ssl.bulix.org/svn/lcd4linux/trunk@279 3ae390bd-cb1e-0410-b409-cd5a39f66f1f
Diffstat (limited to 'plugin.c')
-rw-r--r-- | plugin.c | 159 |
1 files changed, 159 insertions, 0 deletions
diff --git a/plugin.c b/plugin.c new file mode 100644 index 0000000..d34d1cb --- /dev/null +++ b/plugin.c @@ -0,0 +1,159 @@ +/* $Id: plugin.c,v 1.1 2003/12/19 05:35:14 reinelt Exp $ + * + * plugin handler for the Evaluator + * + * Copyright 2003 Michael Reinelt <reinelt@eunet.at> + * + * This file is part of LCD4Linux. + * + * LCD4Linux is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2, or (at your option) + * any later version. + * + * LCD4Linux is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + * + * + * $Log: plugin.c,v $ + * Revision 1.1 2003/12/19 05:35:14 reinelt + * renamed 'client' to 'plugin' + * + * Revision 1.1 2003/10/11 06:01:52 reinelt + * + * renamed expression.{c,h} to client.{c,h} + * added config file client + * new functions 'AddNumericVariable()' and 'AddStringVariable()' + * new parameter '-i' for interactive mode + * + * Revision 1.3 2003/10/06 05:51:15 reinelt + * functions: min(), max() + * + * Revision 1.2 2003/10/06 05:47:27 reinelt + * operators: ==, \!=, <=, >= + * + * Revision 1.1 2003/10/06 04:34:06 reinelt + * expression evaluator added + * + */ + +/* + * exported functions: + * + * int plugin_init (void) + * initializes the expression evaluator + * adds some handy constants and functions + * + */ + + +#include <stdlib.h> +#include <stdio.h> +#include <math.h> +#include <string.h> + +#include "debug.h" +#include "plugin.h" + + + +static void my_sqrt (RESULT *result, RESULT *arg1) +{ + double value=sqrt(R2N(arg1)); + SetResult(&result, R_NUMBER, &value); +} + +static void my_exp (RESULT *result, RESULT *arg1) +{ + double value=exp(R2N(arg1)); + SetResult(&result, R_NUMBER, &value); +} + +static void my_ln (RESULT *result, RESULT *arg1) +{ + double value=log(R2N(arg1)); + SetResult(&result, R_NUMBER, &value); +} + +static void my_log (RESULT *result, RESULT *arg1) +{ + double value=log10(R2N(arg1)); + SetResult(&result, R_NUMBER, &value); +} + +static void my_sin (RESULT *result, RESULT *arg1) +{ + double value=sin(R2N(arg1)); + SetResult(&result, R_NUMBER, &value); +} + +static void my_cos (RESULT *result, RESULT *arg1) +{ + double value=cos(R2N(arg1)); + SetResult(&result, R_NUMBER, &value); +} + +static void my_tan (RESULT *result, RESULT *arg1) +{ + double value=tan(R2N(arg1)); + SetResult(&result, R_NUMBER, &value); +} + + +static void my_min (RESULT *result, RESULT *arg1, RESULT *arg2) +{ + double a1=R2N(arg1); + double a2=R2N(arg2); + double value=a1<a2?a1:a2; + SetResult(&result, R_NUMBER, &value); +} + +static void my_max (RESULT *result, RESULT *arg1, RESULT *arg2) +{ + double a1=R2N(arg1); + double a2=R2N(arg2); + double value=a1>a2?a1:a2; + SetResult(&result, R_NUMBER, &value); +} + + +static void my_strlen (RESULT *result, RESULT *arg1) +{ + double value=strlen(R2S(arg1)); + SetResult(&result, R_NUMBER, &value); +} + + +int plugin_init (void) +{ + // set some handy constants + AddNumericVariable ("Pi", M_PI); + AddNumericVariable ("e", M_E); + + // register some basic math functions + AddFunction ("sqrt", 1, my_sqrt); + AddFunction ("exp", 1, my_exp); + AddFunction ("ln", 1, my_ln); + AddFunction ("log", 1, my_log); + AddFunction ("sin", 1, my_sin); + AddFunction ("cos", 1, my_cos); + AddFunction ("tan", 1, my_tan); + + // min, max + AddFunction ("min", 2, my_min); + AddFunction ("max", 2, my_max); + + // register some basic string functions + AddFunction ("strlen", 1, my_strlen); + + + return 0; +} + + |