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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*
* Copyright 2011-2016 Danny Robson <danny@nerdcruft.net>
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*/
#ifndef __UTIL_STREAM_HPP
#define __UTIL_STREAM_HPP
#include <ostream>
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#include <ios>
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namespace util::stream {
namespace scoped {
#define SCOPED(NAME,TYPE) \
class NAME { \
public: \
NAME (std::ios_base&); \
~NAME (); \
\
private: \
std::ios_base &m_ios; \
TYPE m_state; \
}
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SCOPED(flags, std::ios_base::fmtflags);
SCOPED(precision, std::streamsize);
SCOPED(width, std::streamsize);
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#undef SCOPED
};
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///////////////////////////////////////////////////////////////////////////
class null_streambuf : public std::basic_streambuf<char> {
public:
virtual ~null_streambuf () { ; }
};
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///////////////////////////////////////////////////////////////////////////
class null_ostream : public std::basic_ostream<char> {
public:
virtual ~null_ostream () { ; }
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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;
};
///////////////////////////////////////////////////////////////////////////
struct bits {
bits (uintmax_t value, unsigned count);
uintmax_t value;
unsigned count;
};
//---------------------------------------------------------------------
std::ostream& operator<< (std::ostream&, bits);
}
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#endif