rxvt-unicode/src/simplevec.h

// -*- c++ -*-
/*
 *  MICO --- a free CORBA implementation
 *  Copyright (C) 1997-98 Kay Roemer & Arno Puder
 *
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Library General Public
 *  License as published by the Free Software Foundation; either
 *  version 2 of the License, or (at your option) any later version.
 *
 *  This library is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *  Library General Public License for more details.
 *
 *  You should have received a copy of the GNU Library General Public
 *  License along with this library; if not, write to the Free
 *  Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 *  Send comments and/or bug reports to:
 *                 mico@informatik.uni-frankfurt.de
 */

#ifndef __ministl_simplevec_h__
#define __ministl_simplevec_h__

#include <cstring>

template<class T>
class simplevec {
public:
    typedef T* iterator;
    typedef const T* const_iterator;
    typedef unsigned long size_type;
private:
    size_type _last, _size;
    T *_buf;

public:
    const_iterator begin () const
    {
        return &_buf[0];
    }
    iterator begin ()
    {
        return &_buf[0];
    }
    const_iterator end () const
    {
        return &_buf[_last];
    }
    iterator end ()
    {
        return &_buf[_last];
    }
    size_type capacity () const
    {
        return _size;
    }
    size_type size () const
    {
        return _last;
    }

private:
    static T *alloc (size_type n)
    {
        return (T *)::operator new ((size_t)(n * sizeof (T)));
    }
    static void dealloc (T *buf)
    {
        if (buf)
            ::operator delete (buf);
    }

    void reserve (iterator where, size_type n)
    {
        if (_last + n <= _size) {
            memmove (where+n, where, (end()-where)*sizeof(T));
        } else {
            long sz = _last+n;
            sz = (_size == 0) ? max(sz, 5) : max(sz, 2*_size);
            T *nbuf = alloc (sz);
            if (_buf) {
                memcpy (nbuf, begin(), (where-begin())*sizeof(T));
                memcpy (nbuf + (where-begin()) + n, where,
                        (end()-where)*sizeof(T));
                dealloc (_buf);
            }
            _buf = nbuf;
            _size = sz;
        }
    }
public:
    void reserve (size_type sz)
    {
        if (_size < sz) {
            sz = (_size == 0) ? max(sz, 5) : max(sz, 2*_size);
            T *nbuf = alloc (sz);
            if (_buf) {
                memcpy (nbuf, begin(), size()*sizeof(T));
                dealloc (_buf);
            }
            _buf = nbuf;
            _size = sz;
        }
    }
    simplevec ()
        : _last (0), _size (0), _buf (0)
    {
    }
    simplevec (size_type n, const T& t = T())
        : _last (0), _size (0), _buf (0)
    {
        insert (begin(), n, t);
    }
    simplevec (const_iterator first, const_iterator last)
        : _last (0), _size (0), _buf (0)
    {
        insert (begin(), first, last);
    }
    simplevec (const simplevec<T> &v)
        : _last (0), _size (0), _buf (0)
    {
        reserve (v._last);
        memcpy (_buf, v.begin(), v.size()*sizeof(T));
        _last = v._last;
    }
    simplevec<T> &operator= (const simplevec<T> &v)
    {
        if (this != &v) {
            _last = 0;
            reserve (v._last);
            memcpy (_buf, v.begin(), v.size()*sizeof(T));
            _last = v._last;
        }
        return *this;
    }
    ~simplevec ()
    {
        dealloc (_buf);
    }
    const T &front () const
    {
        //ministl_assert (size() > 0);
        return _buf[0];
    }
    T &front ()
    {
        //ministl_assert (size() > 0);
        return _buf[0];
    }
    const T &back () const
    {
        //ministl_assert (size() > 0);
        return _buf[_last-1];
    }
    T &back ()
    {
        //ministl_assert (size() > 0);
        return _buf[_last-1];
    }
    bool empty () const
    {
        return _last == 0;
    }
    void clear ()
    {
        _last = 0;
    }
    void push_back (const T &t)
    {
        reserve (_last+1);
        *end() = t;
        ++_last;
    }
    void pop_back ()
    {
        //ministl_assert (size() > 0);
        --_last;
    }
    const T &operator[] (size_type idx) const
    {
        //ministl_assert (idx < size());
        return _buf[idx];
    }
    T &operator[] (size_type idx)
    {
        //ministl_assert (idx < size());
        return _buf[idx];
    }
    iterator insert (iterator pos, const T &t)
    {
        //ministl_assert (pos <= end());
        long at = pos - begin();
        reserve (pos, 1);
        pos = begin()+at;
        *pos = t;
        ++_last;
        return pos;
    }
    iterator insert (iterator pos, const_iterator first, const_iterator last)
    {
        //ministl_assert (pos <= end());
        long n = last - first;
        long at = pos - begin();
        if (n > 0) {
            reserve (pos, n);
            pos = begin()+at;
            memcpy (pos, first, (last-first)*sizeof(T));
            _last += n;
        }
        return pos;
    }
    iterator insert (iterator pos, size_type n, const T &t)
    {
        //ministl_assert (pos <= end());
        long at = pos - begin();
        if (n > 0) {
            reserve (pos, n);
            pos = begin()+at;
            for (int i = 0; i < n; ++i)
                pos[i] = t;
            _last += n;
        }
        return pos;
    }
    void erase (iterator first, iterator last)
    {
        if (last != first) {
            memmove (first, last, (end()-last)*sizeof(T));
            _last -= last - first;
        }
    }
    void erase (iterator pos)
    {
        if (pos != end()) {
            memmove (pos, pos+1, (end()-(pos+1))*sizeof(T));
            --_last;
        }
    }
};

template<class T>
bool operator== (const simplevec<T> &v1, const simplevec<T> &v2)
{
    if (v1.size() != v2.size())
        return false;
    return !v1.size() || !memcmp (&v1[0], &v2[0], v1.size()*sizeof(T));
}

template<class T>
bool operator< (const simplevec<T> &v1, const simplevec<T> &v2)
{
    unsigned long minlast = min (v1.size(), v2.size());
    for (unsigned long i = 0; i < minlast; ++i) {
        if (v1[i] < v2[i])
            return true;
        if (v2[i] < v1[i])
            return false;
    }
    return v1.size() < v2.size();
}

#endif
Revision:	1.1
Committed:	Mon Nov 24 17:28:08 2003 UTC (20 years, 6 months ago) by pcg
Content type:	text/plain
Branch:	MAIN
Log Message:	* empty log message *
#	User	Rev	Content
1	pcg	1.1	// -- c++ --
2			/*
3			* MICO --- a free CORBA implementation
4			* Copyright (C) 1997-98 Kay Roemer & Arno Puder
5			*
6			* This library is free software; you can redistribute it and/or
7			* modify it under the terms of the GNU Library General Public
8			* License as published by the Free Software Foundation; either
9			* version 2 of the License, or (at your option) any later version.
10			*
11			* This library is distributed in the hope that it will be useful,
12			* but WITHOUT ANY WARRANTY; without even the implied warranty of
13			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14			* Library General Public License for more details.
15			*
16			* You should have received a copy of the GNU Library General Public
17			* License along with this library; if not, write to the Free
18			* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19			*
20			* Send comments and/or bug reports to:
21			* mico@informatik.uni-frankfurt.de
22			*/
23
24			#ifndef __ministl_simplevec_h__
25			#define __ministl_simplevec_h__
26
27			#include <cstring>
28
29			template<class T>
30			class simplevec {
31			public:
32			typedef T* iterator;
33			typedef const T* const_iterator;
34			typedef unsigned long size_type;
35			private:
36			size_type _last, _size;
37			T *_buf;
38
39			public:
40			const_iterator begin () const
41			{
42			return &_buf[0];
43			}
44			iterator begin ()
45			{
46			return &_buf[0];
47			}
48			const_iterator end () const
49			{
50			return &_buf[_last];
51			}
52			iterator end ()
53			{
54			return &_buf[_last];
55			}
56			size_type capacity () const
57			{
58			return _size;
59			}
60			size_type size () const
61			{
62			return _last;
63			}
64
65			private:
66			static T *alloc (size_type n)
67			{
68			return (T )::operator new ((size_t)(n sizeof (T)));
69			}
70			static void dealloc (T *buf)
71			{
72			if (buf)
73			::operator delete (buf);
74			}
75
76			void reserve (iterator where, size_type n)
77			{
78			if (_last + n <= _size) {
79			memmove (where+n, where, (end()-where)*sizeof(T));
80			} else {
81			long sz = _last+n;
82			sz = (_size == 0) ? max(sz, 5) : max(sz, 2*_size);
83			T *nbuf = alloc (sz);
84			if (_buf) {
85			memcpy (nbuf, begin(), (where-begin())*sizeof(T));
86			memcpy (nbuf + (where-begin()) + n, where,
87			(end()-where)*sizeof(T));
88			dealloc (_buf);
89			}
90			_buf = nbuf;
91			_size = sz;
92			}
93			}
94			public:
95			void reserve (size_type sz)
96			{
97			if (_size < sz) {
98			sz = (_size == 0) ? max(sz, 5) : max(sz, 2*_size);
99			T *nbuf = alloc (sz);
100			if (_buf) {
101			memcpy (nbuf, begin(), size()*sizeof(T));
102			dealloc (_buf);
103			}
104			_buf = nbuf;
105			_size = sz;
106			}
107			}
108			simplevec ()
109			: _last (0), _size (0), _buf (0)
110			{
111			}
112			simplevec (size_type n, const T& t = T())
113			: _last (0), _size (0), _buf (0)
114			{
115			insert (begin(), n, t);
116			}
117			simplevec (const_iterator first, const_iterator last)
118			: _last (0), _size (0), _buf (0)
119			{
120			insert (begin(), first, last);
121			}
122			simplevec (const simplevec<T> &v)
123			: _last (0), _size (0), _buf (0)
124			{
125			reserve (v._last);
126			memcpy (_buf, v.begin(), v.size()*sizeof(T));
127			_last = v._last;
128			}
129			simplevec<T> &operator= (const simplevec<T> &v)
130			{
131			if (this != &v) {
132			_last = 0;
133			reserve (v._last);
134			memcpy (_buf, v.begin(), v.size()*sizeof(T));
135			_last = v._last;
136			}
137			return *this;
138			}
139			~simplevec ()
140			{
141			dealloc (_buf);
142			}
143			const T &front () const
144			{
145			//ministl_assert (size() > 0);
146			return _buf[0];
147			}
148			T &front ()
149			{
150			//ministl_assert (size() > 0);
151			return _buf[0];
152			}
153			const T &back () const
154			{
155			//ministl_assert (size() > 0);
156			return _buf[_last-1];
157			}
158			T &back ()
159			{
160			//ministl_assert (size() > 0);
161			return _buf[_last-1];
162			}
163			bool empty () const
164			{
165			return _last == 0;
166			}
167			void clear ()
168			{
169			_last = 0;
170			}
171			void push_back (const T &t)
172			{
173			reserve (_last+1);
174			*end() = t;
175			++_last;
176			}
177			void pop_back ()
178			{
179			//ministl_assert (size() > 0);
180			--_last;
181			}
182			const T &operator[] (size_type idx) const
183			{
184			//ministl_assert (idx < size());
185			return _buf[idx];
186			}
187			T &operator[] (size_type idx)
188			{
189			//ministl_assert (idx < size());
190			return _buf[idx];
191			}
192			iterator insert (iterator pos, const T &t)
193			{
194			//ministl_assert (pos <= end());
195			long at = pos - begin();
196			reserve (pos, 1);
197			pos = begin()+at;
198			*pos = t;
199			++_last;
200			return pos;
201			}
202			iterator insert (iterator pos, const_iterator first, const_iterator last)
203			{
204			//ministl_assert (pos <= end());
205			long n = last - first;
206			long at = pos - begin();
207			if (n > 0) {
208			reserve (pos, n);
209			pos = begin()+at;
210			memcpy (pos, first, (last-first)*sizeof(T));
211			_last += n;
212			}
213			return pos;
214			}
215			iterator insert (iterator pos, size_type n, const T &t)
216			{
217			//ministl_assert (pos <= end());
218			long at = pos - begin();
219			if (n > 0) {
220			reserve (pos, n);
221			pos = begin()+at;
222			for (int i = 0; i < n; ++i)
223			pos[i] = t;
224			_last += n;
225			}
226			return pos;
227			}
228			void erase (iterator first, iterator last)
229			{
230			if (last != first) {
231			memmove (first, last, (end()-last)*sizeof(T));
232			_last -= last - first;
233			}
234			}
235			void erase (iterator pos)
236			{
237			if (pos != end()) {
238			memmove (pos, pos+1, (end()-(pos+1))*sizeof(T));
239			--_last;
240			}
241			}
242			};
243
244			template<class T>
245			bool operator== (const simplevec<T> &v1, const simplevec<T> &v2)
246			{
247			if (v1.size() != v2.size())
248			return false;
249			return !v1.size() \|\| !memcmp (&v1[0], &v2[0], v1.size()*sizeof(T));
250			}
251
252			template<class T>
253			bool operator< (const simplevec<T> &v1, const simplevec<T> &v2)
254			{
255			unsigned long minlast = min (v1.size(), v2.size());
256			for (unsigned long i = 0; i < minlast; ++i) {
257			if (v1[i] < v2[i])
258			return true;
259			if (v2[i] < v1[i])
260			return false;
261			}
262			return v1.size() < v2.size();
263			}
264
265			#endif