limits.hpp

00001 
00002 //  (C) Copyright John maddock 1999. 
00003 //  (C) David Abrahams 2002.  Distributed under the Boost
00004 //  Software License, Version 1.0. (See accompanying file
00005 //  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
00006 //
00007 // use this header as a workaround for missing <limits>
00008 
00009 //  See http://www.boost.org/libs/utility/limits.html for documentation.
00010 
00011 #ifndef BOOST_LIMITS
00012 #define BOOST_LIMITS
00013 
00014 #include <boost/config.hpp>
00015 
00016 #ifdef BOOST_NO_LIMITS
00017 # include <boost/detail/limits.hpp>
00018 #else
00019 # include <limits>
00020 #endif
00021 
00022 #if (defined(BOOST_HAS_LONG_LONG) && defined(BOOST_NO_LONG_LONG_NUMERIC_LIMITS)) \
00023       || (defined(BOOST_HAS_MS_INT64) && defined(BOOST_NO_MS_INT64_NUMERIC_LIMITS))
00024 // Add missing specializations for numeric_limits:
00025 #ifdef BOOST_HAS_MS_INT64
00026 #  define BOOST_LLT __int64
00027 #  define BOOST_ULLT unsigned __int64
00028 #else
00029 #  define BOOST_LLT  ::boost::long_long_type
00030 #  define BOOST_ULLT  ::boost::ulong_long_type
00031 #endif
00032 
00033 namespace std
00034 {
00035   template<>
00036   class numeric_limits<BOOST_LLT> 
00037   {
00038    public:
00039 
00040       BOOST_STATIC_CONSTANT(bool, is_specialized = true);
00041 #ifdef BOOST_HAS_MS_INT64
00042       static BOOST_LLT min BOOST_PREVENT_MACRO_SUBSTITUTION (){ return 0x8000000000000000i64; }
00043       static BOOST_LLT max BOOST_PREVENT_MACRO_SUBSTITUTION (){ return 0x7FFFFFFFFFFFFFFFi64; }
00044 #elif defined(LLONG_MAX)
00045       static BOOST_LLT min BOOST_PREVENT_MACRO_SUBSTITUTION (){ return LLONG_MIN; }
00046       static BOOST_LLT max BOOST_PREVENT_MACRO_SUBSTITUTION (){ return LLONG_MAX; }
00047 #elif defined(LONGLONG_MAX)
00048       static BOOST_LLT min BOOST_PREVENT_MACRO_SUBSTITUTION (){ return LONGLONG_MIN; }
00049       static BOOST_LLT max BOOST_PREVENT_MACRO_SUBSTITUTION (){ return LONGLONG_MAX; }
00050 #else
00051       static BOOST_LLT min BOOST_PREVENT_MACRO_SUBSTITUTION (){ return 1LL << (sizeof(BOOST_LLT) * CHAR_BIT - 1); }
00052       static BOOST_LLT max BOOST_PREVENT_MACRO_SUBSTITUTION (){ return ~(min)(); }
00053 #endif
00054       BOOST_STATIC_CONSTANT(int, digits = sizeof(BOOST_LLT) * CHAR_BIT -1);
00055       BOOST_STATIC_CONSTANT(int, digits10 = (CHAR_BIT * sizeof (BOOST_LLT) - 1) * 301L / 1000);
00056       BOOST_STATIC_CONSTANT(bool, is_signed = true);
00057       BOOST_STATIC_CONSTANT(bool, is_integer = true);
00058       BOOST_STATIC_CONSTANT(bool, is_exact = true);
00059       BOOST_STATIC_CONSTANT(int, radix = 2);
00060       static BOOST_LLT epsilon() throw() { return 0; };
00061       static BOOST_LLT round_error() throw() { return 0; };
00062 
00063       BOOST_STATIC_CONSTANT(int, min_exponent = 0);
00064       BOOST_STATIC_CONSTANT(int, min_exponent10 = 0);
00065       BOOST_STATIC_CONSTANT(int, max_exponent = 0);
00066       BOOST_STATIC_CONSTANT(int, max_exponent10 = 0);
00067 
00068       BOOST_STATIC_CONSTANT(bool, has_infinity = false);
00069       BOOST_STATIC_CONSTANT(bool, has_quiet_NaN = false);
00070       BOOST_STATIC_CONSTANT(bool, has_signaling_NaN = false);
00071       BOOST_STATIC_CONSTANT(bool, has_denorm = false);
00072       BOOST_STATIC_CONSTANT(bool, has_denorm_loss = false);
00073       static BOOST_LLT infinity() throw() { return 0; };
00074       static BOOST_LLT quiet_NaN() throw() { return 0; };
00075       static BOOST_LLT signaling_NaN() throw() { return 0; };
00076       static BOOST_LLT denorm_min() throw() { return 0; };
00077 
00078       BOOST_STATIC_CONSTANT(bool, is_iec559 = false);
00079       BOOST_STATIC_CONSTANT(bool, is_bounded = true);
00080       BOOST_STATIC_CONSTANT(bool, is_modulo = true);
00081 
00082       BOOST_STATIC_CONSTANT(bool, traps = false);
00083       BOOST_STATIC_CONSTANT(bool, tinyness_before = false);
00084       BOOST_STATIC_CONSTANT(float_round_style, round_style = round_toward_zero);
00085       
00086   };
00087 
00088   template<>
00089   class numeric_limits<BOOST_ULLT> 
00090   {
00091    public:
00092 
00093       BOOST_STATIC_CONSTANT(bool, is_specialized = true);
00094 #ifdef BOOST_HAS_MS_INT64
00095       static BOOST_ULLT min BOOST_PREVENT_MACRO_SUBSTITUTION (){ return 0ui64; }
00096       static BOOST_ULLT max BOOST_PREVENT_MACRO_SUBSTITUTION (){ return 0xFFFFFFFFFFFFFFFFui64; }
00097 #elif defined(ULLONG_MAX) && defined(ULLONG_MIN)
00098       static BOOST_ULLT min BOOST_PREVENT_MACRO_SUBSTITUTION (){ return ULLONG_MIN; }
00099       static BOOST_ULLT max BOOST_PREVENT_MACRO_SUBSTITUTION (){ return ULLONG_MAX; }
00100 #elif defined(ULONGLONG_MAX) && defined(ULONGLONG_MIN)
00101       static BOOST_ULLT min BOOST_PREVENT_MACRO_SUBSTITUTION (){ return ULONGLONG_MIN; }
00102       static BOOST_ULLT max BOOST_PREVENT_MACRO_SUBSTITUTION (){ return ULONGLONG_MAX; }
00103 #else
00104       static BOOST_ULLT min BOOST_PREVENT_MACRO_SUBSTITUTION (){ return 0uLL; }
00105       static BOOST_ULLT max BOOST_PREVENT_MACRO_SUBSTITUTION (){ return ~0uLL; }
00106 #endif
00107       BOOST_STATIC_CONSTANT(int, digits = sizeof(BOOST_LLT) * CHAR_BIT);
00108       BOOST_STATIC_CONSTANT(int, digits10 = (CHAR_BIT * sizeof (BOOST_LLT)) * 301L / 1000);
00109       BOOST_STATIC_CONSTANT(bool, is_signed = false);
00110       BOOST_STATIC_CONSTANT(bool, is_integer = true);
00111       BOOST_STATIC_CONSTANT(bool, is_exact = true);
00112       BOOST_STATIC_CONSTANT(int, radix = 2);
00113       static BOOST_ULLT epsilon() throw() { return 0; };
00114       static BOOST_ULLT round_error() throw() { return 0; };
00115 
00116       BOOST_STATIC_CONSTANT(int, min_exponent = 0);
00117       BOOST_STATIC_CONSTANT(int, min_exponent10 = 0);
00118       BOOST_STATIC_CONSTANT(int, max_exponent = 0);
00119       BOOST_STATIC_CONSTANT(int, max_exponent10 = 0);
00120 
00121       BOOST_STATIC_CONSTANT(bool, has_infinity = false);
00122       BOOST_STATIC_CONSTANT(bool, has_quiet_NaN = false);
00123       BOOST_STATIC_CONSTANT(bool, has_signaling_NaN = false);
00124       BOOST_STATIC_CONSTANT(bool, has_denorm = false);
00125       BOOST_STATIC_CONSTANT(bool, has_denorm_loss = false);
00126       static BOOST_ULLT infinity() throw() { return 0; };
00127       static BOOST_ULLT quiet_NaN() throw() { return 0; };
00128       static BOOST_ULLT signaling_NaN() throw() { return 0; };
00129       static BOOST_ULLT denorm_min() throw() { return 0; };
00130 
00131       BOOST_STATIC_CONSTANT(bool, is_iec559 = false);
00132       BOOST_STATIC_CONSTANT(bool, is_bounded = true);
00133       BOOST_STATIC_CONSTANT(bool, is_modulo = true);
00134 
00135       BOOST_STATIC_CONSTANT(bool, traps = false);
00136       BOOST_STATIC_CONSTANT(bool, tinyness_before = false);
00137       BOOST_STATIC_CONSTANT(float_round_style, round_style = round_toward_zero);
00138       
00139   };
00140 }
00141 #endif 
00142 
00143 #endif
00144