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diff --git a/src/stlplus/portability/time.cpp b/src/stlplus/portability/time.cpp
new file mode 100644
index 0000000..250a825
--- /dev/null
+++ b/src/stlplus/portability/time.cpp
@@ -0,0 +1,129 @@
+////////////////////////////////////////////////////////////////////////////////
+
+//   Author:    Andy Rushton
+//   Copyright: (c) Southampton University 1999-2004
+//              (c) Andy Rushton           2004-2009
+//   License:   BSD License, see ../docs/license.html
+
+////////////////////////////////////////////////////////////////////////////////
+#include "time.hpp"
+#include "dprintf.hpp"
+#include <ctype.h>
+////////////////////////////////////////////////////////////////////////////////
+
+namespace stlplus
+{
+
+  ////////////////////////////////////////////////////////////////////////////////
+
+  time_t time_now(void)
+  {
+    return time(0);
+  }
+
+  time_t localtime_create(int year, int month, int day, int hour, int minute, int second)
+  {
+    tm tm_time;
+    tm_time.tm_year = year-1900;  // years are represented as an offset from 1900, for reasons unknown
+    tm_time.tm_mon = month-1;     // internal format represents month as 0-11, but it is friendlier to take an input 1-12
+    tm_time.tm_mday = day;
+    tm_time.tm_hour = hour;
+    tm_time.tm_min = minute;
+    tm_time.tm_sec = second;
+    tm_time.tm_isdst = -1;        // specify that the function should work out daylight savings
+    time_t result = mktime(&tm_time);
+    return result;
+  }
+
+  int localtime_year(time_t t)
+  {
+    tm* tm_time = localtime(&t);
+    return tm_time->tm_year + 1900;
+  }
+
+  int localtime_month(time_t t)
+  {
+    tm* tm_time = localtime(&t);
+    return tm_time->tm_mon + 1;
+  }
+
+  int localtime_day(time_t t)
+  {
+    tm* tm_time = localtime(&t);
+    return tm_time->tm_mday;
+  }
+
+  int localtime_hour(time_t t)
+  {
+    tm* tm_time = localtime(&t);
+    return tm_time->tm_hour;
+  }
+
+  int localtime_minute(time_t t)
+  {
+    tm* tm_time = localtime(&t);
+    return tm_time->tm_min;
+  }
+
+  int localtime_second(time_t t)
+  {
+    tm* tm_time = localtime(&t);
+    return tm_time->tm_sec;
+  }
+
+  int localtime_weekday(time_t t)
+  {
+    tm* tm_time = localtime(&t);
+    return tm_time->tm_wday;
+  }
+
+  int localtime_yearday(time_t t)
+  {
+    tm* tm_time = localtime(&t);
+    return tm_time->tm_yday;
+  }
+
+  std::string localtime_string(time_t t)
+  {
+    tm* local = localtime(&t);
+    std::string result = local ? asctime(local) : "*time not available*";
+    // ctime appends a newline for no apparent reason - clean up
+    while (!result.empty() && isspace(result[result.size()-1]))
+      result.erase(result.size()-1,1);
+    return result;
+  }
+
+  std::string delaytime_string(time_t seconds)
+  {
+    unsigned minutes = (unsigned)seconds / 60;
+    seconds %= 60;
+    unsigned hours = minutes / 60;
+    minutes %= 60;
+    unsigned days = hours / 24;
+    hours %= 24;
+    unsigned weeks = days / 7;
+    days %= 7;
+    std::string result;
+    if (weeks > 0)
+      result += dformat("%dw ",weeks);
+    if (!result.empty() || days > 0)
+      result += dformat("%dd ", days);
+    if (!result.empty() || hours > 0)
+      result += dformat("%d:", hours);
+    if (!result.empty() || minutes > 0)
+    {
+      if (!result.empty())
+        result += dformat("%02d:", minutes);
+      else
+        result += dformat("%d:", minutes);
+    }
+    if (!result.empty())
+      result += dformat("%02d:", seconds);
+    else
+      result += dformat("%ds", seconds);
+    return result;
+  }
+
+  ////////////////////////////////////////////////////////////////////////////////
+
+} // end namespace stlplus