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authorRemko Tronçon <git@el-tramo.be>2010-03-28 15:46:49 (GMT)
committerRemko Tronçon <git@el-tramo.be>2010-03-28 15:46:49 (GMT)
commitf53a1ef582494458301b97bf6e546be52d7ff7e8 (patch)
tree7571b5cbcbd8a8f1dd1c966c9045b6cb69f0e295 /3rdParty/Boost/src/boost/progress.hpp
parent638345680d72ca6acaf123f2c8c1c391f696e371 (diff)
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Moving submodule contents back.
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+// boost progress.hpp header file ------------------------------------------//
+
+// Copyright Beman Dawes 1994-99. Distributed under the Boost
+// Software License, Version 1.0. (See accompanying file
+// LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+// See http://www.boost.org/libs/timer for documentation.
+
+// Revision History
+// 1 Dec 01 Add leading progress display strings (suggested by Toon Knapen)
+// 20 May 01 Introduce several static_casts<> to eliminate warning messages
+// (Fixed by Beman, reported by Herve Bronnimann)
+// 12 Jan 01 Change to inline implementation to allow use without library
+// builds. See docs for more rationale. (Beman Dawes)
+// 22 Jul 99 Name changed to .hpp
+// 16 Jul 99 Second beta
+// 6 Jul 99 Initial boost version
+
+#ifndef BOOST_PROGRESS_HPP
+#define BOOST_PROGRESS_HPP
+
+#include <boost/timer.hpp>
+#include <boost/utility.hpp> // for noncopyable
+#include <boost/cstdint.hpp> // for uintmax_t
+#include <iostream> // for ostream, cout, etc
+#include <string> // for string
+
+namespace boost {
+
+// progress_timer ----------------------------------------------------------//
+
+// A progress_timer behaves like a timer except that the destructor displays
+// an elapsed time message at an appropriate place in an appropriate form.
+
+class progress_timer : public timer, private noncopyable
+{
+
+ public:
+ explicit progress_timer( std::ostream & os = std::cout )
+ // os is hint; implementation may ignore, particularly in embedded systems
+ : m_os(os) {}
+ ~progress_timer()
+ {
+ // A) Throwing an exception from a destructor is a Bad Thing.
+ // B) The progress_timer destructor does output which may throw.
+ // C) A progress_timer is usually not critical to the application.
+ // Therefore, wrap the I/O in a try block, catch and ignore all exceptions.
+ try
+ {
+ // use istream instead of ios_base to workaround GNU problem (Greg Chicares)
+ std::istream::fmtflags old_flags = m_os.setf( std::istream::fixed,
+ std::istream::floatfield );
+ std::streamsize old_prec = m_os.precision( 2 );
+ m_os << elapsed() << " s\n" // "s" is System International d'Unites std
+ << std::endl;
+ m_os.flags( old_flags );
+ m_os.precision( old_prec );
+ }
+
+ catch (...) {} // eat any exceptions
+ } // ~progress_timer
+
+ private:
+ std::ostream & m_os;
+};
+
+
+// progress_display --------------------------------------------------------//
+
+// progress_display displays an appropriate indication of
+// progress at an appropriate place in an appropriate form.
+
+// NOTE: (Jan 12, 2001) Tried to change unsigned long to boost::uintmax_t, but
+// found some compilers couldn't handle the required conversion to double.
+// Reverted to unsigned long until the compilers catch up.
+
+class progress_display : private noncopyable
+{
+ public:
+ explicit progress_display( unsigned long expected_count,
+ std::ostream & os = std::cout,
+ const std::string & s1 = "\n", //leading strings
+ const std::string & s2 = "",
+ const std::string & s3 = "" )
+ // os is hint; implementation may ignore, particularly in embedded systems
+ : m_os(os), m_s1(s1), m_s2(s2), m_s3(s3) { restart(expected_count); }
+
+ void restart( unsigned long expected_count )
+ // Effects: display appropriate scale
+ // Postconditions: count()==0, expected_count()==expected_count
+ {
+ _count = _next_tic_count = _tic = 0;
+ _expected_count = expected_count;
+
+ m_os << m_s1 << "0% 10 20 30 40 50 60 70 80 90 100%\n"
+ << m_s2 << "|----|----|----|----|----|----|----|----|----|----|"
+ << std::endl // endl implies flush, which ensures display
+ << m_s3;
+ if ( !_expected_count ) _expected_count = 1; // prevent divide by zero
+ } // restart
+
+ unsigned long operator+=( unsigned long increment )
+ // Effects: Display appropriate progress tic if needed.
+ // Postconditions: count()== original count() + increment
+ // Returns: count().
+ {
+ if ( (_count += increment) >= _next_tic_count ) { display_tic(); }
+ return _count;
+ }
+
+ unsigned long operator++() { return operator+=( 1 ); }
+ unsigned long count() const { return _count; }
+ unsigned long expected_count() const { return _expected_count; }
+
+ private:
+ std::ostream & m_os; // may not be present in all imps
+ const std::string m_s1; // string is more general, safer than
+ const std::string m_s2; // const char *, and efficiency or size are
+ const std::string m_s3; // not issues
+
+ unsigned long _count, _expected_count, _next_tic_count;
+ unsigned int _tic;
+ void display_tic()
+ {
+ // use of floating point ensures that both large and small counts
+ // work correctly. static_cast<>() is also used several places
+ // to suppress spurious compiler warnings.
+ unsigned int tics_needed =
+ static_cast<unsigned int>(
+ (static_cast<double>(_count)/_expected_count)*50.0 );
+ do { m_os << '*' << std::flush; } while ( ++_tic < tics_needed );
+ _next_tic_count =
+ static_cast<unsigned long>((_tic/50.0)*_expected_count);
+ if ( _count == _expected_count ) {
+ if ( _tic < 51 ) m_os << '*';
+ m_os << std::endl;
+ }
+ } // display_tic
+};
+
+} // namespace boost
+
+#endif // BOOST_PROGRESS_HPP