// NOTE: in order to compile this system on Linux (and most Unix // systems) you will have to include the -lrt flag to your compiler. /*Nicholas Mohammad nm9ur timer.cpp 10/19/2017 */ #include <sstream> #include <math.h> #include <cstring> #include "timer.h" timer::timer(timer & t) : running(t.running) { memcpy(&startVar, &(t.startVar), sizeof (timeval)); memcpy(&stopVar, &(t.stopVar), sizeof (timeval)); } int timer::start() { if (!running) { running = true; gettimeofday(&startVar,NULL); return 0; } return 1; } int timer::stop() { if (running) { running = 0; gettimeofday(&stopVar,NULL); return 0; } return 1; } ostream & timer::print(ostream & out) { return (out << toString()); } double timer::getTime() { time_t sec = stopVar.tv_sec - startVar.tv_sec; long usec = stopVar.tv_usec - startVar.tv_usec; return sec + usec/1000000.0; } string timer::toString() { ostringstream out; if (running) out << "Timer still running\n"; else { time_t sec = stopVar.tv_sec - startVar.tv_sec; long usec = stopVar.tv_usec - startVar.tv_usec; if ( usec < 0 ) { sec--; usec += 1000000; } out << sec << "." << ((usec<100000)?"0":"") << ((usec<10000)?"0":"") << ((usec<1000)?"0":"") << ((usec<100)?"0":"") << ((usec<10)?"0":"") << usec; } return out.str(); } ostream & operator<<(ostream &out, timer &t) { return t.print(out); }