73 lines
1.9 KiB
C++
73 lines
1.9 KiB
C++
/*
|
|
* 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
|
|
*
|
|
* 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.
|
|
*
|
|
* Copyright 2010 Danny Robson <danny@nerdcruft.net>
|
|
*/
|
|
|
|
#include "stream.hpp"
|
|
|
|
#include "debug.hpp"
|
|
|
|
using util::stream::null;
|
|
using util::stream::bits;
|
|
|
|
//-----------------------------------------------------------------------------
|
|
std::ostream&
|
|
null::put (char)
|
|
{ return *this; }
|
|
|
|
|
|
//-----------------------------------------------------------------------------
|
|
bool
|
|
null::good (void) const
|
|
{ return !bad () && !eof () && !fail (); }
|
|
|
|
|
|
//-----------------------------------------------------------------------------
|
|
bool null::bad (void) const { return false; }
|
|
bool null::eof (void) const { return false; }
|
|
bool null::fail (void) const { return false; }
|
|
|
|
|
|
//-----------------------------------------------------------------------------
|
|
bits::bits (uintmax_t _value, unsigned _count):
|
|
value (_value),
|
|
count (_count)
|
|
{
|
|
CHECK_LE (count, sizeof(value) * 8);
|
|
}
|
|
|
|
|
|
//-----------------------------------------------------------------------------
|
|
std::ostream&
|
|
util::stream::operator<< (std::ostream &os, util::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;
|
|
}
|