libptytty/src/estl.h

#include <stdlib.h>
#include <string.h>

template<typename T, typename U> static inline T    min    (T  a, U b) { return a < (T)b ? a : (T)b; }
template<typename T, typename U> static inline T    max    (T  a, U b) { return a > (T)b ? a : (T)b; }

template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; }

template <typename I, typename T>
I find (I first, I last, const T& value)
{
  while (first != last && *first != value)
    ++first;

  return first;
}

/* simplevec taken (and heavily modified), from:
 *
 *  MICO --- a free CORBA implementation
 *  Copyright (C) 1997-98 Kay Roemer & Arno Puder
 */
template<class T>
struct simplevec
{
    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 {
            size_type 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 push_back (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;
        }
    }
    void swap (simplevec<T> &t)
    {
        ::swap(_last, t._last);
        ::swap(_size, t._size);
        ::swap(_buf, t._buf);
    }
};

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 ();
}

template<typename T>
struct vector : simplevec<T>
{
};
Revision:	1.1
Committed:	Sat Jan 21 13:40:29 2012 UTC (12 years, 5 months ago) by sf-exg
Content type:	text/plain
Branch:	MAIN
Log Message:	Port find/vector implementation from urxvt and always use it in place of stl.
#	User	Rev	Content
1	sf-exg	1.1	#include <stdlib.h>
2			#include <string.h>
3
4			template<typename T, typename U> static inline T min (T a, U b) { return a < (T)b ? a : (T)b; }
5			template<typename T, typename U> static inline T max (T a, U b) { return a > (T)b ? a : (T)b; }
6
7			template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; }
8
9			template <typename I, typename T>
10			I find (I first, I last, const T& value)
11			{
12			while (first != last && *first != value)
13			++first;
14
15			return first;
16			}
17
18			/* simplevec taken (and heavily modified), from:
19			*
20			* MICO --- a free CORBA implementation
21			* Copyright (C) 1997-98 Kay Roemer & Arno Puder
22			*/
23			template<class T>
24			struct simplevec
25			{
26			typedef T* iterator;
27			typedef const T* const_iterator;
28			typedef unsigned long size_type;
29
30			private:
31			size_type _last, _size;
32			T *_buf;
33
34			public:
35			const_iterator begin () const
36			{
37			return &_buf[0];
38			}
39			iterator begin ()
40			{
41			return &_buf[0];
42			}
43			const_iterator end () const
44			{
45			return &_buf[_last];
46			}
47			iterator end ()
48			{
49			return &_buf[_last];
50			}
51			size_type capacity () const
52			{
53			return _size;
54			}
55			size_type size () const
56			{
57			return _last;
58			}
59
60			private:
61			static T *alloc (size_type n)
62			{
63			return (T )::operator new ((size_t) (n sizeof (T)));
64			}
65			static void dealloc (T *buf)
66			{
67			if (buf)
68			::operator delete (buf);
69			}
70
71			void reserve (iterator where, size_type n)
72			{
73			if (_last + n <= _size) {
74			memmove (where+n, where, (end ()-where)*sizeof (T));
75			} else {
76			size_type sz = _last+n;
77			sz = (_size == 0) ? max (sz, 5) : max (sz, 2*_size);
78			T *nbuf = alloc (sz);
79			if (_buf) {
80			memcpy (nbuf, begin (), (where-begin ())*sizeof (T));
81			memcpy (nbuf + (where-begin ()) + n, where,
82			(end ()-where)*sizeof (T));
83			dealloc (_buf);
84			}
85			_buf = nbuf;
86			_size = sz;
87			}
88			}
89
90			public:
91			void reserve (size_type sz)
92			{
93			if (_size < sz) {
94			sz = (_size == 0) ? max (sz, 5) : max (sz, 2*_size);
95			T *nbuf = alloc (sz);
96			if (_buf) {
97			memcpy (nbuf, begin (), size ()*sizeof (T));
98			dealloc (_buf);
99			}
100			_buf = nbuf;
101			_size = sz;
102			}
103			}
104			simplevec ()
105			: _last(0), _size(0), _buf(0)
106			{
107			}
108			simplevec (size_type n, const T& t = T ())
109			: _last(0), _size(0), _buf(0)
110			{
111			insert (begin (), n, t);
112			}
113			simplevec (const_iterator first, const_iterator last)
114			: _last(0), _size(0), _buf(0)
115			{
116			insert (begin (), first, last);
117			}
118			simplevec (const simplevec<T> &v)
119			: _last(0), _size(0), _buf(0)
120			{
121			reserve (v._last);
122			memcpy (_buf, v.begin (), v.size ()*sizeof (T));
123			_last = v._last;
124			}
125			simplevec<T> &operator= (const simplevec<T> &v)
126			{
127			if (this != &v) {
128			_last = 0;
129			reserve (v._last);
130			memcpy (_buf, v.begin (), v.size ()*sizeof (T));
131			_last = v._last;
132			}
133			return *this;
134			}
135			~simplevec ()
136			{
137			dealloc (_buf);
138			}
139			const T &front () const
140			{
141			//ministl_assert (size () > 0);
142			return _buf[0];
143			}
144			T &front ()
145			{
146			//ministl_assert (size () > 0);
147			return _buf[0];
148			}
149			const T &back () const
150			{
151			//ministl_assert (size () > 0);
152			return _buf[_last-1];
153			}
154			T &back ()
155			{
156			//ministl_assert (size () > 0);
157			return _buf[_last-1];
158			}
159			bool empty () const
160			{
161			return _last == 0;
162			}
163			void clear ()
164			{
165			_last = 0;
166			}
167			void push_back (const T &t)
168			{
169			reserve (_last+1);
170			*end () = t;
171			++_last;
172			}
173			void push_back (T &t)
174			{
175			reserve (_last+1);
176			*end () = t;
177			++_last;
178			}
179			void pop_back ()
180			{
181			//ministl_assert (size () > 0);
182			--_last;
183			}
184			const T &operator[] (size_type idx) const
185			{
186			//ministl_assert (idx < size ());
187			return _buf[idx];
188			}
189			T &operator[] (size_type idx)
190			{
191			//ministl_assert (idx < size ());
192			return _buf[idx];
193			}
194			iterator insert (iterator pos, const T &t)
195			{
196			//ministl_assert (pos <= end ());
197			long at = pos - begin ();
198			reserve (pos, 1);
199			pos = begin ()+at;
200			*pos = t;
201			++_last;
202			return pos;
203			}
204			iterator insert (iterator pos, const_iterator first, const_iterator last)
205			{
206			//ministl_assert (pos <= end ());
207			long n = last - first;
208			long at = pos - begin ();
209			if (n > 0) {
210			reserve (pos, n);
211			pos = begin ()+at;
212			memcpy (pos, first, (last-first)*sizeof (T));
213			_last += n;
214			}
215			return pos;
216			}
217			iterator insert (iterator pos, size_type n, const T &t)
218			{
219			//ministl_assert (pos <= end ());
220			long at = pos - begin ();
221			if (n > 0) {
222			reserve (pos, n);
223			pos = begin ()+at;
224			for (int i = 0; i < n; ++i)
225			pos[i] = t;
226			_last += n;
227			}
228			return pos;
229			}
230			void erase (iterator first, iterator last)
231			{
232			if (last != first) {
233			memmove (first, last, (end () - last) * sizeof (T));
234			_last -= last - first;
235			}
236			}
237			void erase (iterator pos)
238			{
239			if (pos != end ()) {
240			memmove (pos, pos+1, (end () - (pos+1)) * sizeof (T));
241			--_last;
242			}
243			}
244			void swap (simplevec<T> &t)
245			{
246			::swap(_last, t._last);
247			::swap(_size, t._size);
248			::swap(_buf, t._buf);
249			}
250			};
251
252			template<class T>
253			bool operator== (const simplevec<T> &v1, const simplevec<T> &v2)
254			{
255			if (v1.size () != v2.size ())
256			return false;
257			return !v1.size () \|\| !memcmp (&v1[0], &v2[0], v1.size ()*sizeof (T));
258			}
259
260			template<class T>
261			bool operator< (const simplevec<T> &v1, const simplevec<T> &v2)
262			{
263			unsigned long minlast = min (v1.size (), v2.size ());
264			for (unsigned long i = 0; i < minlast; ++i) {
265			if (v1[i] < v2[i])
266			return true;
267			if (v2[i] < v1[i])
268			return false;
269			}
270			return v1.size () < v2.size ();
271			}
272
273			template<typename T>
274			struct vector : simplevec<T>
275			{
276			};