Add a date and datetime meter (#159)

Add a date meter and sort header and source files in Makefile

Change the lists of header and source files sorted alphabetical and one
file per line. This way diffs become better readable and merges easier.

1 files changed, 47 insertions, 0 deletions

diff --git a/DateTimeMeter.c b/DateTimeMeter.c
new file mode 100644
index 00000000..5c60884a
--- /dev/null
+++ b/DateTimeMeter.c
@@ -0,0 +1,47 @@
+/*
+htop - DateTimeMeter.c
+(C) 2004-2020 Hisham H. Muhammad, Michael Schönitzer
+Released under the GNU GPL, see the COPYING file
+in the source distribution for its full text.
+*/
+
+#include "DateTimeMeter.h"
+
+#include "CRT.h"
+
+#include <time.h>
+
+
+int DateTimeMeter_attributes[] = {
+   DATETIME
+};
+
+static void DateTimeMeter_updateValues(Meter* this, char* buffer, int size) {
+   time_t t = time(NULL);
+   struct tm result;
+   struct tm *lt = localtime_r(&t, &result);
+   int year = lt->tm_year + 1900;
+   if (((year % 4 == 0) && (year % 100!= 0)) || (year%400 == 0)) {
+      this->total = 366;
+   }
+   else {
+      this->total = 365;
+   }
+   this->values[0] = lt->tm_yday;
+   strftime(buffer, size, "%F %H:%M:%S", lt);
+}
+
+MeterClass DateTimeMeter_class = {
+   .super = {
+      .extends = Class(Meter),
+      .delete = Meter_delete
+   },
+   .updateValues = DateTimeMeter_updateValues,
+   .defaultMode = TEXT_METERMODE,
+   .maxItems = 1,
+   .total = 365,
+   .attributes = DateTimeMeter_attributes,
+   .name = "DateTime",
+   .uiName = "Date and Time",
+   .caption = "Date & Time: ",
+};