b881408ed7
never clear about whether the end of the range was inclusive
or exclusive. Make it inclusive, but also provide a RangeSize()
function that will generate a Range based on a start and a size.
This, in combination with using the comparison operators, makes
almost all usages of the range not care how it is stored.
base/range.cc:
Make the end of the range inclusive.
start/end -> first/last
(end seems too much like end() in stl)
base/range.hh:
Make the end of the range inclusive.
Fix all comparison operators so that they work correctly with
an inclusive range. Also, when comparing one range to another
with <, <=, >, >=, we only look at the beginning of the range
beacuse x <= y should be the same as x < y || x == y. (This wasn't
the case before.)
Add a few functions for making a range:
RangeSize is start and size
RangeEx is start and end where end is exclusive
RangeIn is start and end where end is inclusive
start/end -> first/last
(end seems too much like end() in stl)
dev/alpha_console.cc:
dev/baddev.cc:
dev/ide_ctrl.cc:
dev/ns_gige.cc:
dev/pciconfigall.cc:
dev/pcidev.cc:
dev/tsunami_cchip.cc:
dev/tsunami_io.cc:
dev/tsunami_pchip.cc:
dev/uart.cc:
Use the RangeSize function to create a range.
--HG--
extra : convert_revision : 29a7eb7fce745680f1c77fefff456c2144bc3994
353 lines
8.8 KiB
C++
353 lines
8.8 KiB
C++
/*
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* Copyright (c) 2002-2004 The Regents of The University of Michigan
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met: redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer;
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* redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution;
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* neither the name of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef __BASE_RANGE_HH__
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#define __BASE_RANGE_HH__
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#include <cassert>
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#include <string>
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/**
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* @param s range string
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* EndExclusive Ranges are in the following format:
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* <range> := {<start_val>}:{<end>}
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* <start> := <end_val> | +<delta>
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*/
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template <class T>
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bool __parse_range(const std::string &s, T &start, T &end);
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template <class T>
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struct Range
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{
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T start;
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T end;
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Range() { invalidate(); }
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template <class U>
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Range(const std::pair<U, U> &r)
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: start(r.first), end(r.second)
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{}
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template <class U>
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Range(const Range<U> &r)
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: start(r.start), end(r.end)
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{}
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Range(const std::string &s)
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{
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if (!__parse_range(s, start, end))
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invalidate();
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}
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template <class U>
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const Range<T> &operator=(const Range<U> &r)
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{
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start = r.start;
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end = r.end;
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return *this;
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}
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template <class U>
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const Range<T> &operator=(const std::pair<U, U> &r)
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{
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start = r.first;
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end = r.second;
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return *this;
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}
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const Range &operator=(const std::string &s)
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{
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if (!__parse_range(s, start, end))
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invalidate();
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return *this;
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}
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void invalidate() { start = 1; end = 0; }
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T size() const { return end - start + 1; }
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bool valid() const { return start < end; }
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};
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template <class T>
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inline std::ostream &
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operator<<(std::ostream &o, const Range<T> &r)
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{
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o << '[' << r.start << "," << r.end << ']';
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return o;
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}
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template <class T>
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inline Range<T>
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RangeEx(T start, T end)
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{ return std::make_pair(start, end - 1); }
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template <class T>
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inline Range<T>
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RangeIn(T start, T end)
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{ return std::make_pair(start, end); }
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template <class T, class U>
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inline Range<T>
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RangeSize(T start, U size)
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{ return std::make_pair(start, start + size - 1); }
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////////////////////////////////////////////////////////////////////////
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//
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// Range to Range Comparisons
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//
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/**
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* @param range1 is a range.
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* @param range2 is a range.
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* @return if range1 and range2 are identical.
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*/
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template <class T, class U>
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inline bool
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operator==(const Range<T> &range1, const Range<U> &range2)
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{
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return range1.start == range2.start && range1.end == range2.end;
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}
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/**
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* @param range1 is a range.
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* @param range2 is a range.
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* @return if range1 and range2 are not identical.
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*/
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template <class T, class U>
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inline bool
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operator!=(const Range<T> &range1, const Range<U> &range2)
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{
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return range1.start != range2.start || range1.end != range2.end;
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}
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/**
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* @param range1 is a range.
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* @param range2 is a range.
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* @return if range1 is less than range2 and does not overlap range1.
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*/
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template <class T, class U>
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inline bool
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operator<(const Range<T> &range1, const Range<U> &range2)
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{
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return range1.start < range2.start;
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}
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/**
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* @param range1 is a range.
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* @param range2 is a range.
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* @return if range1 is less than range2. range1 may overlap range2,
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* but not extend beyond the end of range2.
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*/
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template <class T, class U>
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inline bool
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operator<=(const Range<T> &range1, const Range<U> &range2)
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{
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return range1.start <= range2.start;
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}
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/**
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* @param range1 is a range.
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* @param range2 is a range.
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* @return if range1 is greater than range2 and does not overlap range2.
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*/
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template <class T, class U>
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inline bool
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operator>(const Range<T> &range1, const Range<U> &range2)
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{
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return range1.start > range2.start;
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}
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/**
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* @param range1 is a range.
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* @param range2 is a range.
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* @return if range1 is greater than range2. range1 may overlap range2,
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* but not extend beyond the beginning of range2.
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*/
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template <class T, class U>
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inline bool
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operator>=(const Range<T> &range1, const Range<U> &range2)
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{
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return range1.start >= range2.start;
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}
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////////////////////////////////////////////////////////////////////////
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//
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// Position to Range Comparisons
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//
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/**
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* @param pos position compared to the range.
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* @param range range compared against.
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* @return indicates that position pos is within the range.
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*/
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template <class T, class U>
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inline bool
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operator==(const T &pos, const Range<U> &range)
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{
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return pos >= range.start && pos <= range.end;
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}
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/**
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* @param pos position compared to the range.
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* @param range range compared against.
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* @return indicates that position pos is not within the range.
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*/
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template <class T, class U>
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inline bool
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operator!=(const T &pos, const Range<U> &range)
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{
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return pos < range.start || pos > range.end;
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}
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/**
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* @param pos position compared to the range.
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* @param range range compared against.
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* @return indicates that position pos is below the range.
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*/
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template <class T, class U>
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inline bool
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operator<(const T &pos, const Range<U> &range)
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{
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return pos < range.start;
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}
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/**
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* @param pos position compared to the range.
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* @param range range compared against.
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* @return indicates that position pos is below or in the range.
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*/
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template <class T, class U>
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inline bool
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operator<=(const T &pos, const Range<U> &range)
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{
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return pos <= range.end;
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}
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/**
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* @param pos position compared to the range.
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* @param range range compared against.
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* @return indicates that position pos is above the range.
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*/
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template <class T, class U>
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inline bool
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operator>(const T &pos, const Range<U> &range)
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{
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return pos > range.end;
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}
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/**
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* @param pos position compared to the range.
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* @param range range compared against.
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* @return indicates that position pos is above or in the range.
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*/
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template <class T, class U>
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inline bool
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operator>=(const T &pos, const Range<U> &range)
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{
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return pos >= range.start;
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}
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////////////////////////////////////////////////////////////////////////
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//
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// Range to Position Comparisons (for symmetry)
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//
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/**
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* @param range range compared against.
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* @param pos position compared to the range.
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* @return indicates that position pos is within the range.
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*/
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template <class T, class U>
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inline bool
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operator==(const Range<T> &range, const U &pos)
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{
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return pos >= range.start && pos <= range.end;
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}
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/**
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* @param range range compared against.
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* @param pos position compared to the range.
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* @return indicates that position pos is not within the range.
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*/
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template <class T, class U>
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inline bool
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operator!=(const Range<T> &range, const U &pos)
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{
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return pos < range.start || pos > range.end;
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}
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/**
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* @param range range compared against.
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* @param pos position compared to the range.
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* @return indicates that position pos is above the range.
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*/
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template <class T, class U>
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inline bool
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operator<(const Range<T> &range, const U &pos)
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{
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return range.end < pos;
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}
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/**
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* @param range range compared against.
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* @param pos position compared to the range.
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* @return indicates that position pos is above or in the range.
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*/
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template <class T, class U>
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inline bool
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operator<=(const Range<T> &range, const U &pos)
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{
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return range.start <= pos;
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}
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/**
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* @param range range compared against.
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* @param pos position compared to the range.
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* 'range > pos' indicates that position pos is below the range.
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*/
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template <class T, class U>
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inline bool
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operator>(const Range<T> &range, const U &pos)
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{
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return range.start > pos;
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}
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/**
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* @param range range compared against.
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* @param pos position compared to the range.
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* 'range >= pos' indicates that position pos is below or in the range.
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*/
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template <class T, class U>
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inline bool
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operator>=(const Range<T> &range, const U &pos)
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{
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return range.end >= pos;
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}
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#endif // __BASE_RANGE_HH__
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