83 lines
3.2 KiB
C
83 lines
3.2 KiB
C
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/*****************************************************************************************[Queue.h]
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MiniSat -- Copyright (c) 2003-2006, Niklas Een, Niklas Sorensson
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Permission is hereby granted, free of charge, to any person obtaining a copy of this software and
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associated documentation files (the "Software"), to deal in the Software without restriction,
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including without limitation the rights to use, copy, modify, merge, publish, distribute,
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sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in all copies or
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substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT
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NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
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DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT
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OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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**************************************************************************************************/
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#ifndef Queue_h
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#define Queue_h
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#include "Vec.h"
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//=================================================================================================
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template <class T>
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class Queue {
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vec<T> elems;
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int first;
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public:
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Queue(void) : first(0) { }
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void insert(T x) { elems.push(x); }
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T peek () const { return elems[first]; }
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void pop () { first++; }
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void clear(bool dealloc = false) { elems.clear(dealloc); first = 0; }
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int size(void) { return elems.size() - first; }
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//bool has(T x) { for (int i = first; i < elems.size(); i++) if (elems[i] == x) return true; return false; }
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const T& operator [] (int index) const { return elems[first + index]; }
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};
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//template<class T>
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//class Queue {
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// vec<T> buf;
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// int first;
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// int end;
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//
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//public:
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// typedef T Key;
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//
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// Queue() : buf(1), first(0), end(0) {}
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//
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// void clear () { buf.shrinkTo(1); first = end = 0; }
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// int size () { return (end >= first) ? end - first : end - first + buf.size(); }
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//
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// T peek () { assert(first != end); return buf[first]; }
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// void pop () { assert(first != end); first++; if (first == buf.size()) first = 0; }
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// void insert(T elem) { // INVARIANT: buf[end] is always unused
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// buf[end++] = elem;
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// if (end == buf.size()) end = 0;
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// if (first == end){ // Resize:
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// vec<T> tmp((buf.size()*3 + 1) >> 1);
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// //**/printf("queue alloc: %d elems (%.1f MB)\n", tmp.size(), tmp.size() * sizeof(T) / 1000000.0);
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// int i = 0;
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// for (int j = first; j < buf.size(); j++) tmp[i++] = buf[j];
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// for (int j = 0 ; j < end ; j++) tmp[i++] = buf[j];
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// first = 0;
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// end = buf.size();
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// tmp.moveTo(buf);
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// }
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// }
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//};
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//=================================================================================================
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#endif
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