Initial revision.

simgear/timing/Makefile.am

@@ -6,6 +6,7 @@ include_HEADERS = \
 	geocoord.h \
 	lowleveltime.h \
 	sg_time.hxx \
+	timestamp.hxx \
 	timezone.h
 
 libsgtiming_a_SOURCES = \

simgear/timing/timestamp.hxx

@@ -0,0 +1,180 @@
+// timestamp.hxx -- class for managing a timestamp (seconds & milliseconds.)
+//
+// Written by Curtis Olson, started December 1998.
+//
+// Copyright (C) 1998  Curtis L. Olson  - curt@flightgear.org
+//
+// 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+//
+// $Id$
+
+
+#ifndef _TIMESTAMP_HXX
+#define _TIMESTAMP_HXX
+
+
+#ifndef __cplusplus                                                          
+# error This library requires C++
+#endif                                   
+
+
+#ifdef HAVE_CONFIG_H
+#  include <config.h>
+#endif
+
+#ifdef HAVE_WINDOWS_H
+#  include <windows.h>
+#endif
+
+#include <simgear/compiler.h>
+
+#ifdef FG_HAVE_STD_INCLUDES
+#  include <ctime>
+#else
+#  include <time.h>
+#endif
+
+#ifdef HAVE_SYS_TIMEB_H
+#  include <sys/timeb.h> // for ftime() and struct timeb
+#endif
+#ifdef HAVE_UNISTD_H
+#  include <unistd.h>    // for gettimeofday()
+#endif
+#ifdef HAVE_SYS_TIME_H
+#  include <sys/time.h>  // for get/setitimer, gettimeofday, struct timeval
+#endif
+
+// -dw- want to use metrowerks time.h
+#ifdef macintosh
+#  include <time.h>
+#  include <timer.h>
+#endif
+
+#ifdef WIN32
+#  include <windows.h>
+#  if defined( __CYGWIN__ ) || defined( __CYGWIN32__ )
+#    define NEAR /* */
+#    define FAR  /* */
+#  endif
+#  include <mmsystem.h>
+#endif
+
+// MSVC++ 6.0 kuldge - Need forward declaration of friends.
+class SGTimeStamp;
+SGTimeStamp operator + (const SGTimeStamp& t, const long& m);
+long operator - (const SGTimeStamp& a, const SGTimeStamp& b);
+
+class SGTimeStamp {
+
+private:
+
+    long seconds;
+    long usec;
+
+public:
+
+    SGTimeStamp();
+    SGTimeStamp( const long s, const long m );
+    ~SGTimeStamp();
+
+    // Set time to current time
+    void stamp();
+
+    SGTimeStamp& operator = ( const SGTimeStamp& t );
+
+    friend SGTimeStamp operator + (const SGTimeStamp& t, const long& m);
+    friend long operator - (const SGTimeStamp& a, const SGTimeStamp& b);
+
+    inline long get_seconds() const { return seconds; }
+    // inline long get_usec() const { return usec; }
+};
+
+inline SGTimeStamp::SGTimeStamp() {
+}
+
+inline SGTimeStamp::SGTimeStamp( const long s, const long u ) {
+    seconds = s;
+    usec = u;
+}
+
+inline SGTimeStamp::~SGTimeStamp() {
+}
+
+inline SGTimeStamp& SGTimeStamp::operator = (const SGTimeStamp& t)
+{
+    seconds = t.seconds;
+    usec = t.usec;
+    return *this;
+}
+
+inline void SGTimeStamp::stamp() {
+#if defined( WIN32 )
+    unsigned int t;
+    t = timeGetTime();
+    seconds = 0;
+    usec =  t * 1000;
+#elif defined( HAVE_GETTIMEOFDAY )
+    struct timeval current;
+    struct timezone tz;
+    // sg_timestamp currtime;
+    gettimeofday(&current, &tz);
+    seconds = current.tv_sec;
+    usec = current.tv_usec;
+#elif defined( HAVE_GETLOCALTIME )
+    SYSTEMTIME current;
+    GetLocalTime(&current);
+    seconds = current.wSecond;
+    usec = current.wMilliseconds * 1000;
+#elif defined( HAVE_FTIME )
+    struct timeb current;
+    ftime(&current);
+    seconds = current.time;
+    usec = current.millitm * 1000;
+// -dw- uses time manager
+#elif defined( macintosh )
+    UnsignedWide ms;
+    Microseconds(&ms);
+	
+    seconds = ms.lo / 1000000;
+    usec = ms.lo - ( seconds * 1000000 );
+#else
+# error Port me
+#endif
+}
+
+// increment the time stamp by the number of microseconds (usec)
+inline SGTimeStamp operator + (const SGTimeStamp& t, const long& m) {
+#ifdef WIN32
+    return SGTimeStamp( 0, t.usec + m );
+#else
+    return SGTimeStamp( t.seconds + ( t.usec + m ) / 1000000,
+			( t.usec + m ) % 1000000 );
+#endif
+}
+
+// difference between time stamps in microseconds (usec)
+inline long operator - (const SGTimeStamp& a, const SGTimeStamp& b)
+{
+#if defined( WIN32 )
+    return a.usec - b.usec;
+#else
+    return 1000000 * (a.seconds - b.seconds) + (a.usec - b.usec);
+#endif
+}
+
+
+#endif // _TIMESTAMP_HXX
+
+