[lcd4linux @ 2004-01-13 10:03:01 by reinelt]

new util 'hash' for associative arrays
new plugin 'cpuinfo'

git-svn-id: https://ssl.bulix.org/svn/lcd4linux/trunk@309 3ae390bd-cb1e-0410-b409-cd5a39f66f1f

plugin_cfg.c

@@ -0,0 +1,125 @@
+/* $Id: plugin_cfg.c,v 1.1 2004/01/13 10:03:01 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 1.1  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 <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 (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;
+}