73 lines
2.0 KiB
C++
73 lines
2.0 KiB
C++
/*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* 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
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* Copyright 2010 Danny Robson <danny@nerdcruft.net>
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*/
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#include "stream.hpp"
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#include "debug.hpp"
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using util::stream::null_ostream;
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using util::stream::bits;
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//-----------------------------------------------------------------------------
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std::ostream&
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null_ostream::put (char)
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{ return *this; }
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//-----------------------------------------------------------------------------
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bool
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null_ostream::good (void) const
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{ return !bad () && !eof () && !fail (); }
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//-----------------------------------------------------------------------------
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bool null_ostream::bad (void) const { return false; }
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bool null_ostream::eof (void) const { return false; }
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bool null_ostream::fail (void) const { return false; }
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//-----------------------------------------------------------------------------
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bits::bits (uintmax_t _value, unsigned _count):
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value (_value),
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count (_count)
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{
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CHECK_LE (count, sizeof(value) * 8);
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}
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//-----------------------------------------------------------------------------
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std::ostream&
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util::stream::operator<< (std::ostream &os, util::stream::bits b) {
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char digits[sizeof (b.value) * 8 + 1] = { 0 };
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char *cursor = std::end (digits) - 1;
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uintmax_t bits = b.value;
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unsigned count = b.count;
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while (count) {
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CHECK_GE (cursor, digits);
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--cursor;
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*cursor = (bits & 0x01) ? '1' : '0';
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bits >>= 1;
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count -= 1;
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}
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os << cursor << "/" << b.count;
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return os;
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}
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