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/* $Id: plugin_cfg.c,v 1.3 2004/01/29 04:40:02 reinelt Exp $
*
* plugin for config file access
*
* Copyright 2003, 2004 Michael Reinelt <reinelt@eunet.at>
* Copyright 2004 The LCD4Linux Team <lcd4linux-devel@users.sourceforge.net>
*
* 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_cfg.c,v $
* Revision 1.3 2004/01/29 04:40:02 reinelt
* every .c file includes "config.h" now
*
* Revision 1.2 2004/01/14 11:33:00 reinelt
* new plugin 'uname' which does what it's called
* text widget nearly finished
* first results displayed on MatrixOrbital
*
* Revision 1.1 2004/01/13 10:03:01 reinelt
* new util 'hash' for associative arrays
* new plugin 'cpuinfo'
*
*/
/*
* exported functions:
*
* int plugin_init_cfg (void)
* adds cfg() function for config access
* initializes variables from the config file
*
*/
#include "config.h"
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "debug.h"
#include "evaluator.h"
#include "plugin.h"
#include "cfg.h"
static void load_variables (void)
{
char *section="Variables";
char *list, *key;
char *expression;
RESULT result = {0, 0.0, NULL};
list=cfg_list(section);
key=strtok(list, "|");
while (key!=NULL) {
if (strchr(key, '.')!=NULL || strchr(key, ':') !=0) {
error ("ignoring variable '%s' from %s: structures not allowed", key, cfg_source());
} else {
expression=cfg_get_raw (section, key, "");
if (expression!=NULL && *expression!='\0') {
if (Eval(expression, &result)==0) {
debug ("Variable %s = '%s' (%f)", key, R2S(&result), R2N(&result));
SetVariable (key, &result);
DelResult (&result);
} else {
error ("error evaluating variable '%s' from %s", key, cfg_source());
}
}
}
key=strtok(NULL, "|");
}
free (list);
}
static void my_cfg (RESULT *result, int argc, RESULT *argv[])
{
int i, len;
char *value;
char *buffer;
// calculate key length
len=0;
for (i=0; i<argc; i++) {
len+=strlen(R2S(argv[i]))+1;
}
// allocate key buffer
buffer=malloc(len+1);
// prepare key buffer
*buffer='\0';
for (i=0; i<argc; i++) {
strcat (buffer, ".");
strcat (buffer, R2S(argv[i]));
}
// buffer starts with '.', so cut off first char
value=cfg_get("", buffer+1, "");
// free buffer again
free (buffer);
// store result
SetResult(&result, R_STRING, value);
}
int plugin_init_cfg (void)
{
// load "Variables" section from cfg
load_variables();
// register plugin
AddFunction ("cfg", -1, my_cfg);
return 0;
}
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