libcruft-util/stream.hpp

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/*
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* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
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*
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* Copyright 2011 Danny Robson <danny@nerdcruft.net>
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*/
#ifndef __UTIL_STREAM_HPP
#define __UTIL_STREAM_HPP
#include <iostream>
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#include "types/bits.hpp"
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namespace util {
namespace stream {
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//---------------------------------------------------------------------
template <typename T>
struct numeric
{
explicit numeric (T _val): val (_val) { ; }
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T val;
};
template <typename T>
std::ostream& operator<< (std::ostream &os, numeric<T> n)
{
static_assert (std::is_fundamental<T>::value,
"numeric streamer is intended for chars");
using integral_t = typename std::conditional<
std::is_floating_point<T>::value,
T,
typename std::conditional<
std::is_signed<T>::value,
sized_type< intmax_t>::sint,
sized_type<uintmax_t>::uint
>::type
>::type;
return os << (integral_t)n.val;
}
//---------------------------------------------------------------------
class null : public std::ostream {
public:
std::ostream & put (char c);
std::ostream & write (const char *s, std::streamsize n);
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std::streampos tellp (void);
std::ostream & seekp (std::streampos pos);
std::ostream & seekp (std::streamoff off,
std::ios_base::seekdir dir);
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std::ostream & flush (void);
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bool good (void) const;
bool bad (void) const;
bool eof (void) const;
bool fail (void) const;
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};
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//---------------------------------------------------------------------
struct bits {
bits (uintmax_t value, unsigned count);
uintmax_t value;
unsigned count;
};
std::ostream& operator<< (std::ostream&, bits);
}
}
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#endif