[c++0x] <date_time> implementation, take 2

[Pedro LamarÃo <pedro dot lamarao at mndfck dot org>]

Here goes. The patch was generated with svn diff.

It defines get_system_time using std::time; we can add support for more 
precise stuff later.

Attached in a tarball is a testsuite for std::nanoseconds and 
std::system_time.

2008-03-10  Pedro LamarÃo  <pedro.lamarao@gmail.com>

	* include/std/date_time: new file.
	* src/date_time.cpp: new file.
	* config/abi/pre/gnu.ver: get_system_time is a new symbol
	in version GLIBCXX_3.4.11.
	* include/Makefile.am: add date_time in std headers.
	* src/Makefile.am: add date_time.cc to source files.

--
 P.

Attachment: 31_date_time.tar.bz2
Description: application/bzip

Index: src/date_time.cc
===================================================================
--- src/date_time.cc	(revisão 0)
+++ src/date_time.cc	(revisão 0)
@@ -0,0 +1,41 @@
+// Copyright (C) 2008
+// Free Software Foundation, Inc.
+//
+// This file is part of the GNU ISO C++ Library.  This library 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, or (at your option)
+// any later version.
+
+// This library 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 library; see the file COPYING.  If not, write to the Free
+// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
+// USA.
+
+// As a special exception, you may use this file as part of a free software
+// library without restriction.  Specifically, if other files instantiate
+// templates or use macros or inline functions from this file, or you compile
+// this file and link it with other files to produce an executable, this
+// file does not by itself cause the resulting executable to be covered by
+// the GNU General Public License.  This exception does not however
+// invalidate any other reasons why the executable file might be covered by
+// the GNU General Public License.
+
+#include <date_time>
+
+namespace std
+{
+
+  system_time
+  get_system_time()
+  {
+    time_t sec = time(0);
+    return system_time(sec);
+  }
+
+}
Index: src/Makefile.am
===================================================================
--- src/Makefile.am	(revisão 133071)
+++ src/Makefile.am	(cópia de trabalho)
@@ -141,6 +141,7 @@
 	compatibility.cc \
 	complex_io.cc \
 	ctype.cc \
+	date_time.cc \
 	debug.cc \
 	functexcept.cc \
 	hash.cc \
@@ -242,6 +243,11 @@
 hashtable_c++0x.o: hashtable_c++0x.cc
 	$(CXXCOMPILE) -std=gnu++0x -c $<
 
+date_time.lo: date_time.cc
+	$(LTCXXCOMPILE) -std=gnu++0x -c $<
+date_time.o: date_time.cc
+	$(CXXCOMPILE) -std=gnu++0x -c $<
+
 if GLIBCXX_LDBL_COMPAT
 # Use special rules for compatibility-ldbl.cc compilation, as we need to
 # pass -mlong-double-64.
Index: include/std/date_time
===================================================================
--- include/std/date_time	(revisão 0)
+++ include/std/date_time	(revisão 0)
@@ -0,0 +1,237 @@
+// <date_time> -*- C++ -*-
+
+// Copyright (C) 2008 Free Software Foundation, Inc.
+//
+// This file is part of the GNU ISO C++ Library.  This library 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, or (at your option)
+// any later version.
+
+// This library 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 library; see the file COPYING.  If not, write to
+// the Free Software Foundation, 51 Franklin Street, Fifth Floor,
+// Boston, MA 02110-1301, USA.
+
+// As a special exception, you may use this file as part of a free software
+// library without restriction.  Specifically, if other files instantiate
+// templates or use macros or inline functions from this file, or you compile
+// this file and link it with other files to produce an executable, this
+// file does not by itself cause the resulting executable to be covered by
+// the GNU General Public License.  This exception does not however
+// invalidate any other reasons why the executable file might be covered by
+// the GNU General Public License.
+
+/** @file include/date_time
+ *  This is a Standard C++ Library header.
+ */
+
+#ifndef _GLIBCXX_DATE_TIME
+#define _GLIBCXX_DATE_TIME 1
+
+#pragma GCC system_header
+
+#ifndef __GXX_EXPERIMENTAL_CXX0X__
+# include <c++0x_warning.h>
+#endif
+
+#include <ctime>
+
+namespace std
+{
+
+  // duration types
+  
+  class nanoseconds
+  {
+  public:
+  
+    // traits information
+    typedef long long tick_type;
+    static const tick_type ticks_per_second = 1000L * 1000 * 1000;
+    static const tick_type seconds_per_tick = 0;
+    static const bool is_subsecond = true;
+  
+    // construct/copy/destroy
+    nanoseconds(long long ns = 0) : ns(ns) { }
+  
+    // modifiers
+    template<typename RhsDuration>
+      nanoseconds&
+      operator+=(const RhsDuration& d);
+  
+    template<typename RhsDuration>
+      nanoseconds&
+      operator-=(const RhsDuration& d);
+  
+    nanoseconds&
+    operator*=(long multiplier);
+  
+    nanoseconds&
+    operator/=(long divisor);
+  
+    // observers
+    tick_type count() const { return ns; }
+  
+    // operations
+    nanoseconds operator-() const { return nanoseconds(-ns); }
+  
+  private:
+    tick_type ns;
+  };
+  
+  class microseconds;
+  class milliseconds;
+  class seconds;
+  class minutes;
+  class hours;
+  
+  // timepoint type
+  class system_time
+  {
+  public:
+  
+    // traits information
+    typedef nanoseconds::tick_type tick_type;
+    static const tick_type ticks_per_second = nanoseconds::ticks_per_second;
+    static const tick_type seconds_per_tick = 0;
+    static const bool is_subsecond = true;
+  
+    // create/copy/destroy
+  
+    system_time() : tv_sec(0), tv_nsec(0) { }
+  
+    explicit system_time(time_t s, nanoseconds ns = 0)
+    : tv_sec(s), tv_nsec(0) { }
+  
+    time_t
+    seconds_since_epoch() const { return tv_sec; }
+  
+    nanoseconds
+    nanoseconds_since_epoch() const
+    {
+      return nanoseconds(tv_nsec + tv_sec * ticks_per_second);
+    }
+  
+    // comparison functions
+  
+    bool operator==(const system_time& rhs) const
+    {
+      const tick_type ns = tv_nsec + tv_sec * ticks_per_second;
+      const tick_type xns = rhs.tv_nsec + rhs.tv_sec * ticks_per_second;
+      return ns == xns;
+    }
+  
+    bool operator!=(const system_time& rhs) const
+    {
+      return !(*this == rhs);
+    }
+  
+    bool operator<(const system_time& rhs) const
+    {
+      const tick_type ns = tv_nsec + tv_sec * ticks_per_second;
+      const tick_type xns = rhs.tv_nsec + rhs.tv_sec * ticks_per_second;
+      return ns < xns;
+    }
+  
+    bool operator<=(const system_time& rhs) const
+    {
+      return !(rhs < *this);
+    }
+  
+    bool operator>(const system_time& rhs) const
+    {
+      return rhs < *this;
+    }
+  
+    bool operator>=(const system_time& rhs) const
+    {
+      return !(*this < rhs);
+    }
+  
+    // arithmetic functions
+    nanoseconds operator-(const system_time& rhs) const
+    {
+      const tick_type ns = tv_nsec + tv_sec * ticks_per_second;
+      const tick_type xns = rhs.tv_nsec + rhs.tv_sec * ticks_per_second;
+      return nanoseconds(ns - xns);
+    }
+  
+    template<typename Duration>
+      system_time
+      operator+(const Duration& td) const;
+  
+    template<typename Duration>
+      system_time&
+      operator+=(const Duration& td);
+  
+    template<typename Duration>
+      system_time
+      operator-(const Duration& td) const;
+  
+    template<typename Duration>
+      system_time&
+      operator-=(const Duration& td);
+  
+  public:
+    time_t tv_sec;
+    long tv_nsec;
+  };
+  
+  // non-member functions
+  system_time
+  get_system_time();
+  
+  template<typename Duration>
+    system_time
+    operator+(const Duration& td, const system_time& rhs);
+  
+  template<class LhsDuration, class RhsDuration>
+    bool
+    operator==(const LhsDuration& lhs, const RhsDuration& rhs);
+  template<class LhsDuration, class RhsDuration>
+    bool
+    operator!=(const LhsDuration& lhs, const RhsDuration& rhs);
+  
+  template<class LhsDuration, class RhsDuration>
+     bool
+     operator<(const LhsDuration& lhs, const RhsDuration& rhs);
+  template<class LhsDuration, class RhsDuration>
+    bool
+    operator<=(const LhsDuration& lhs, const RhsDuration& rhs);
+  template<class LhsDuration, class RhsDuration>
+    bool
+    operator>(const LhsDuration& lhs, const RhsDuration& rhs);
+  template<class LhsDuration, class RhsDuration>
+    bool
+    operator>=(const LhsDuration& lhs, const RhsDuration& rhs);
+  
+  template<typename LhsDuration, typename RhsDuration>
+    struct __finest_duration;
+  
+  template<class LhsDuration, class RhsDuration>
+    typename __finest_duration<LhsDuration, RhsDuration>::type
+    operator+(const LhsDuration& lhs, const RhsDuration& rhs);
+  template<class LhsDuration, class RhsDuration>
+    typename __finest_duration<LhsDuration, RhsDuration>::type
+    operator-(const LhsDuration& lhs, const RhsDuration& rhs);
+  
+  template<class Duration>
+    Duration
+    operator*(Duration lhs, long rhs);
+  template<class Duration>
+    Duration
+    operator*(long lhs, Duration rhs);
+  
+  template<class Duration>
+    Duration
+    operator/(Duration lhs, long rhs);
+
+}
+
+#endif /* _GLIBCXX_DATE_TIME */
Index: include/Makefile.am
===================================================================
--- include/Makefile.am	(revisão 133071)
+++ include/Makefile.am	(cópia de trabalho)
@@ -33,6 +33,7 @@
 	${std_srcdir}/bitset \
 	${std_srcdir}/c++0x_warning.h \
 	${std_srcdir}/complex \
+	${std_srcdir}/date_time \
 	${std_srcdir}/deque \
 	${std_srcdir}/fstream \
 	${std_srcdir}/functional \
Index: config/abi/pre/gnu.ver
===================================================================
--- config/abi/pre/gnu.ver	(revisão 133071)
+++ config/abi/pre/gnu.ver	(cópia de trabalho)
@@ -803,6 +803,9 @@
     _ZNSt12system_errorC*;
 
     _ZNKSt4hashISt10error_codeEclES0_;
+    
+    # date_time
+    _ZSt15get_system_timev;
 
 } GLIBCXX_3.4.10;