144 lines
3.9 KiB
C++
144 lines
3.9 KiB
C++
/* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
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/*
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* Main authors:
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* Christian Schulte <schulte@gecode.org>
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*
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* Copyright:
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* Christian Schulte, 2002
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*
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* This file is part of Gecode, the generic constraint
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* development environment:
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* http://www.gecode.org
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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*/
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namespace Gecode { namespace Support {
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/**
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* \brief Stack with fixed number of elements
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*
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* \ingroup FuncSupport
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*/
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template<class T, class A>
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class StaticStack {
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private:
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/// Allocator
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A& a;
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/// Number of elements
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int n;
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/// Top of stack
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unsigned int tos;
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/// Stack space
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T* stack;
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public:
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/// Initialize for \a n elements
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StaticStack(A& a, int n);
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/// Release memory
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~StaticStack(void);
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/// Reset stack (pop all elements)
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void reset(void);
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/// Test whether stack is empty
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bool empty(void) const;
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/// Return number of entries currently on stack
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int entries(void) const;
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/// Pop topmost element from stack and return it
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T pop(void);
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/// Return element on top of stack
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T& top(void) const;
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/// Return element that has just been popped
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T& last(void) const;
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/// Push element \a x on top of stack
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void push(const T& x);
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/// Allocate memory from heap (disabled)
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static void* operator new(size_t s) = delete;
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/// Free memory allocated from heap (disabled)
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static void operator delete(void* p) = delete;
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/// Copy constructor (disabled)
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StaticStack(const StaticStack& s) = delete;
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/// Assignment operator (disabled)
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const StaticStack& operator =(const StaticStack&) = delete;
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};
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template<class T, class A>
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forceinline
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StaticStack<T,A>::StaticStack(A& a0, int n0)
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: a(a0), n(n0), tos(0), stack(a.template alloc<T>(n)) {}
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template<class T, class A>
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forceinline
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StaticStack<T,A>::~StaticStack(void) {
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a.free(stack,n);
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}
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template<class T, class A>
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forceinline bool
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StaticStack<T,A>::empty(void) const {
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return tos==0;
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}
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template<class T, class A>
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forceinline int
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StaticStack<T,A>::entries(void) const {
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return tos;
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}
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template<class T, class A>
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forceinline void
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StaticStack<T,A>::reset(void) {
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tos = 0;
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}
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template<class T, class A>
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forceinline T
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StaticStack<T,A>::pop(void) {
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assert((tos > 0) && (tos <= static_cast<unsigned int>(n)));
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return stack[--tos];
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}
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template<class T, class A>
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forceinline T&
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StaticStack<T,A>::top(void) const {
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assert((tos > 0) && (tos <= static_cast<unsigned int>(n)));
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return stack[tos-1];
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}
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template<class T, class A>
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forceinline T&
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StaticStack<T,A>::last(void) const {
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assert((tos >= 0) && (tos < static_cast<unsigned int>(n)));
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return stack[tos];
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}
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template<class T, class A>
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forceinline void
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StaticStack<T,A>::push(const T& x) {
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assert(tos < static_cast<unsigned int>(n));
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stack[tos++] = x;
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}
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}}
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// STATISTICS: support-any
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