--- /dev/null
+/* $Id: plugin_w1retap.c
+ *
+ * plugin to perform simple file operations for w1retap
+ *
+ * Copyright (C) 2007 Jonathan Hudson <jh+w1retap@daria.co.uk>
+ * Copyright (C) 2006 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.
+ *
+ */
+
+/*
+ * This module returns a specific value associated with a key from a
+ * file containing one or more lines formatted as KEY=VALUE.
+ *
+ * It is intended for use with the w1retap weather station logging
+ * software <http://www.daria.co.uk/wx/tech.html>, but is applicable
+ * to any similarly formatted file.
+ */
+
+/*
+ * exported functions:
+ *
+ * int plugin_init_file (void)
+ * adds various functions
+ *
+ */
+
+
+#include "config.h"
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <ctype.h>
+
+#include "debug.h"
+#include "plugin.h"
+
+#ifdef WITH_DMALLOC
+#include <dmalloc.h>
+#endif
+
+/* function 'my_readkey' */
+/* takes two arguments, file name and key */
+/* returns value associated with key, trimmed to suitable dec places */
+
+static void my_readkey(RESULT * result, RESULT * arg1, RESULT * arg2)
+{
+ char value[80], val2[80];
+ FILE *fp;
+ char *reqkey, *pval;
+ size_t size;
+
+ *value = 0;
+ pval = value;
+
+ reqkey = R2S(arg2);
+ fp = fopen(R2S(arg1), "r");
+
+ if (!fp) {
+ error("w1retap couldn't open file '%s'", R2S(arg1));
+ value[0] = '\0';
+ } else {
+ size = strlen(reqkey);
+ while (!feof(fp) && pval == value) {
+ fgets(val2, sizeof(val2), fp);
+ if (*(val2 + size) == '=') {
+ if (strncmp(val2, reqkey, size) == 0) {
+ char *p;
+ p = index(val2, ' ');
+ if (p == NULL) {
+ p = index(val2, '\n');
+ }
+
+ if (p) {
+ *p = 0;
+ pval = val2 + size + 1;
+ {
+ double d;
+ char *ep;
+ d = strtod(pval, &ep);
+ if (ep != pval && (*ep == 0 || isspace(*ep))) {
+ if (d > 500)
+ sprintf(val2, "%.0f", d);
+ else
+ sprintf(val2, "%.1f", d);
+ pval = val2;
+ }
+ }
+ }
+ }
+ }
+ }
+ fclose(fp);
+ }
+
+ /* store result */
+ SetResult(&result, R_STRING, pval);
+}
+
+
+/* plugin initialization */
+/* MUST NOT be declared 'static'! */
+int plugin_init_w1retap(void)
+{
+
+ /* register all our cool functions */
+ /* the second parameter is the number of arguments */
+ /* -1 stands for variable argument list */
+ AddFunction("w1retap::readkey", 2, my_readkey);
+
+ return 0;
+}
+
+void plugin_exit_w1retap(void)
+{
+ /* free any allocated memory */
+ /* close filedescriptors */
+}
+
+
+/*
+
+#Sample configuration for w1retap
+#================================
+
+Display Weather {
+ Driver 'Pertelian'
+ Port '/dev/ttyUSB0'
+ Size '20x4'
+ Backlight 1
+ Icons 0
+}
+
+Display XWindow {
+ Driver 'X11'
+ Size '120x32'
+ Font '6x8'
+ Pixel '4+1'
+ Gap '-1x-1'
+ Border 20
+ Foreground '000000ff'
+ Background '00000033'
+ Basecolor '70c000'
+ Buttons 6
+ Brightness 133
+}
+
+Widget LCDTimer {
+ class 'Timer'
+ active 1
+ update 10000
+ expression h=strftime('%H', time()); x=file::readline('/tmp/.lcd',1)+0; b=(h > 5 | h < 23) + x ; LCD::backlight(b)
+}
+
+
+Widget Temp {
+ class 'Text'
+ expression w1retap::readkey(file, 'OTMP0')
+ prefix 'Extr '
+ width 10
+ align 'L'
+ update tick
+}
+
+Widget GHouse {
+ class 'Text'
+ expression w1retap::readkey(file, 'GHT')
+ prefix 'GHT '
+ width 10
+ align 'L'
+ update tick
+}
+
+Widget House {
+ class 'Text'
+ expression w1retap::readkey(file, 'OTMP1')
+ prefix 'Intr '
+ width 10
+ align 'L'
+ update tick
+}
+Widget Garage {
+ class 'Text'
+ expression w1retap::readkey(file, 'OTMP2')
+ prefix 'Gge '
+ width 10
+ align 'L'
+ update tick
+}
+Widget Soil {
+ class 'Text'
+ expression w1retap::readkey(file, 'STMP1')
+ prefix 'Soil '
+ width 10
+ align 'L'
+ update tick
+}
+Widget Press {
+ class 'Text'
+ expression w1retap::readkey(file, 'OPRS')
+ prefix 'Pres '
+ width 10
+ align 'L'
+ update tick
+}
+
+Widget Rain {
+ class 'Text'
+ expression w1retap::readkey(file1, 'RAIN')
+ prefix 'Rain '
+ width 20
+ align 'L'
+ update tick
+}
+
+Layout Default {
+ Timer1 'LCDTimer'
+ Row1 {
+ Col1 'Temp'
+ Col11 'GHouse'
+ }
+
+ Row2 {
+ Col1 'House'
+ Col11 'Garage'
+ }
+
+ Row3 {
+ Col1 'Soil'
+ Col11 'Press'
+ }
+
+ Row4 {
+ Col1 'Rain'
+ }
+}
+
+Variables {
+ tick 120000
+ file '/tmp/.w1retap.dat'
+ file1 '/tmp/.w1rain.txt'
+}
+
+Layout 'Default'
+
+Display 'Weather'
+
+*/
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