67 lines
1.8 KiB
Plaintext
67 lines
1.8 KiB
Plaintext
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// This may look like C code, but it is really -*- C++ -*-
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/*
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Copyright (C) 1988 Free Software Foundation
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written by Doug Lea (dl@rocky.oswego.edu)
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This file is part of the GNU C++ Library. This library is free
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software; you can redistribute it and/or modify it under the terms of
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the GNU Library General Public License as published by the Free
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Software Foundation; either version 2 of the License, or (at your
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option) any later version. This library is distributed in the hope
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that it will be useful, but WITHOUT ANY WARRANTY; without even the
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implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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PURPOSE. See the GNU Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with this library; if not, write to the Free Software
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Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifdef __GNUG__
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#pragma implementation
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#endif
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#include <stream.h>
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#include "<T>.VStack.h"
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// error handling
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<T>VStack::<T>VStack(<T>VStack& b)
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:size(b.size), ptr(b.ptr), s(new <T> [b.size])
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{
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for (int i = 0; i < ptr; ++i) s[i] = b.s[i];
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}
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void <T>VStack::operator = (<T>VStack& b)
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{
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if (&b == this) return;
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if (size < b.ptr)
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{
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delete [] s;
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s = new <T> [b.size];
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size = b.size;
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}
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ptr = b.ptr;
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for (int i = 0; i < ptr; ++i) s[i] = b.s[i];
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}
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void <T>VStack::resize(int newsz)
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{
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if (newsz < ptr) error("resize: new size too small");
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<T>* news = new <T> [newsz];
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for (int i = 0; i < ptr; ++i) news[i] = s[i];
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delete [] s;
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s = news;
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size = newsz;
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}
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int <T>VStack::OK()
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{
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int v = s != 0; // have space
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v &= size >= 0; // a legal size
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v &= ptr <= size; // ptr within bounds
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v &= ptr >= 0;
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if (!v) error("invariant failure");
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return v;
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}
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