Danny Robson
f6056153e3
This places, at long last, the core library code into the same namespace as the extended library code.
114 lines
2.7 KiB
C++
114 lines
2.7 KiB
C++
/*
|
|
* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
|
|
*
|
|
* Copyright 2010 Danny Robson <danny@nerdcruft.net>
|
|
*/
|
|
|
|
#include "stream.hpp"
|
|
|
|
#include "debug.hpp"
|
|
|
|
#include <ostream>
|
|
|
|
using cruft::stream::null_ostream;
|
|
using cruft::stream::bits;
|
|
|
|
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
cruft::stream::scoped::flags::flags (std::ios_base &_ios):
|
|
m_ios (_ios),
|
|
m_state (_ios.flags ())
|
|
{ ; }
|
|
|
|
|
|
//-----------------------------------------------------------------------------
|
|
cruft::stream::scoped::flags::~flags ()
|
|
{
|
|
m_ios.flags (m_state);
|
|
}
|
|
|
|
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
cruft::stream::scoped::precision::precision (std::ios_base &_ios):
|
|
m_ios (_ios),
|
|
m_state (_ios.precision ())
|
|
{ ; }
|
|
|
|
|
|
//-----------------------------------------------------------------------------
|
|
cruft::stream::scoped::precision::~precision ()
|
|
{
|
|
m_ios.precision (m_state);
|
|
}
|
|
|
|
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
cruft::stream::scoped::width::width (std::ios_base &_ios):
|
|
m_ios (_ios),
|
|
m_state (_ios.width ())
|
|
{ ; }
|
|
|
|
|
|
//-----------------------------------------------------------------------------
|
|
cruft::stream::scoped::width::~width ()
|
|
{
|
|
m_ios.width (m_state);
|
|
}
|
|
|
|
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
std::ostream&
|
|
null_ostream::put (char)
|
|
{
|
|
return *this;
|
|
}
|
|
|
|
|
|
//-----------------------------------------------------------------------------
|
|
bool
|
|
null_ostream::good (void) const
|
|
{
|
|
return !bad () && !eof () && !fail ();
|
|
}
|
|
|
|
|
|
//-----------------------------------------------------------------------------
|
|
bool null_ostream::bad (void) const { return false; }
|
|
bool null_ostream::eof (void) const { return false; }
|
|
bool null_ostream::fail (void) const { return false; }
|
|
|
|
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
bits::bits (uintmax_t _value, unsigned _count):
|
|
value (_value),
|
|
count (_count)
|
|
{
|
|
CHECK_LE (count, sizeof(value) * 8);
|
|
}
|
|
|
|
|
|
//-----------------------------------------------------------------------------
|
|
std::ostream&
|
|
cruft::stream::operator<< (std::ostream &os, cruft::stream::bits b) {
|
|
char digits[sizeof (b.value) * 8 + 1] = { 0 };
|
|
char *cursor = std::end (digits) - 1;
|
|
|
|
uintmax_t bits = b.value;
|
|
unsigned count = b.count;
|
|
|
|
while (count) {
|
|
CHECK_GE (cursor, digits);
|
|
|
|
--cursor;
|
|
*cursor = (bits & 0x01) ? '1' : '0';
|
|
|
|
bits >>= 1;
|
|
count -= 1;
|
|
}
|
|
|
|
os << cursor << "/" << b.count;
|
|
return os;
|
|
}
|