Initial import of memory monitor applet

ede-panel/applets/mem-monitor/MemMonitor.cpp

@@ -0,0 +1,67 @@
+#include <FL/Fl.H>
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <edelib/Missing.h>
+#include "Applet.h"
+#include "MemMonitor.h"
+
+#define UPDATE_INTERVAL .5f
+#define STR_CMP(first, second, n) (strncmp(first, second, n) == 0)
+
+static long get_number(const char *ln) {
+	char *s = edelib_strndup(ln, 128);
+	int i = 1;
+
+	for(char *p = strtok(s, " "); p; p = strtok(NULL, " "), i++) {
+		if(i == 2)
+			return atol(p);
+	}
+
+	free(s);
+	return 0;
+}
+
+static void mem_timeout_cb(void *d) {
+	((MemMonitor*)d)->update_status();
+	Fl::repeat_timeout(UPDATE_INTERVAL, mem_timeout_cb, d);
+}
+
+MemMonitor::MemMonitor() : Fl_Box(0, 0, 45, 25), mem_usedp(0), swap_usedp(0) {
+	box(FL_THIN_DOWN_BOX);
+	Fl::add_timeout(UPDATE_INTERVAL, mem_timeout_cb, this);
+}
+
+void MemMonitor::update_status(void) {
+	FILE *fd = fopen("/proc/meminfo", "r");
+	if(!fd) return;
+
+	long mem_total, mem_free, swap_total, swap_free;
+	mem_total = mem_free = swap_total = swap_free = 0;
+
+	char buf[128];
+	while(fgets(buf, 128, fd) != 0) {
+		if(STR_CMP(buf, "MemTotal:", 9))
+			mem_total = get_number(buf);
+		else if(STR_CMP(buf, "MemFree:", 8))
+			mem_free = get_number(buf);
+		else if(STR_CMP(buf, "SwapTotal:", 10))
+			swap_total = get_number(buf);
+		else if(STR_CMP(buf, "SwapFree:", 9))
+			swap_free = get_number(buf);
+	}
+
+	fclose(fd);
+
+	mem_usedp  = 100 - (int)(((float)mem_free / (float)mem_total) * 100);
+	swap_usedp = 100 - (int)(((float)swap_total / (float)swap_free) * 100);
+}
+
+EDE_PANEL_APPLET_EXPORT (
+ MemMonitor, 
+ EDE_PANEL_APPLET_OPTION_ALIGN_RIGHT,
+ "Memory monitor",
+ "0.1",
+ "empty",
+ "Sanel Zukan"
+)