SlowOperationInformer.cpp [plain text]
#include "llvm/Support/SlowOperationInformer.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/System/Alarm.h"
#include <sstream>
#include <cassert>
using namespace llvm;
SlowOperationInformer::SlowOperationInformer(const std::string &Name)
: OperationName(Name), LastPrintAmount(0) {
sys::SetupAlarm(1);
}
SlowOperationInformer::~SlowOperationInformer() {
sys::TerminateAlarm();
if (LastPrintAmount) {
outs() << std::string(LastPrintAmount, '\b') << "Progress "
<< OperationName << ": 100% \n";
}
}
bool SlowOperationInformer::progress(unsigned Amount) {
int status = sys::AlarmStatus();
if (status == -1) {
outs() << "\n";
LastPrintAmount = 0;
return true;
}
if (status == 0)
return false;
std::string ToPrint = std::string(LastPrintAmount, '\b');
std::ostringstream OS;
OS << "Progress " << OperationName << ": " << Amount/10;
if (unsigned Rem = Amount % 10)
OS << "." << Rem << "%";
else
OS << "% ";
LastPrintAmount = OS.str().size();
outs() << ToPrint+OS.str();
outs().flush();
return false;
}