extracted utility functions into util.c, use utility functions where possible,

add sample output to each screen function

clients/lcdproc/util.c

@@ -0,0 +1,75 @@
+/******************************************************************************
+*
+*  util.c - utility functions to print some numerical values in a nice fashion
+*  Copyright (C) 2005  Peter Marschall
+*
+*  ---
+*
+*  This program 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
+*  of the License, or (at your option) any later version.
+* 
+*  This program 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+*
+*  ---
+* 
+*  $Source$
+*  $Revision$
+*  Checked in by: $Author$
+*
+*******************************************************************************/
+
+#include "util.h"
+
+
+/** print a memory value with the correct unit to a given string */
+char *
+sprintf_memory(char *dst, double value, double roundlimit)
+{
+	if (dst != NULL) {
+		static char *units[] = { "", "k", "M", "G", "T", "P", "E", "Z", "Y", NULL };
+		int offs = 0;
+		char *format = "%.1f%s";
+
+		if ((roundlimit <= 0.0) || (roundlimit > 1.0))
+			roundlimit = 0.5;
+
+		while (units[offs] != NULL > 0) {
+			if (value <= 1024 * roundlimit)
+				break;
+			offs++;
+			value /= 1024;
+		}
+		if (value < 100)
+			format = "%.2f%s";
+		if (value < 10)
+			format = "%.3f%s";
+		
+		sprintf(dst, format, value, units[offs]);
+	}	
+	return dst;	
+}
+
+
+/** print a percentage value to a given string */
+char *
+sprintf_percent(char *dst, double percent)
+{
+	if (dst != NULL) {
+		if (percent > 99.9)
+			strcpy(dst, "100%");
+		else
+			sprintf(dst, "%.1f%%", (percent >= 0) ? percent : 0);
+	}	
+	return dst;
+}
+
+/* EOF */