rxvt-unicode/src/rxvtutil.h

#ifndef RXVT_UTIL_H
#define RXVT_UTIL_H

#include <cstdlib>
#include <cstring>
#include <inttypes.h>
#include "ecb.h"

using namespace std;

// increases code size unless -fno-enforce-eh-specs
#if __GNUC__
# define NOTHROW
# define THROW(x)
#else
# define NOTHROW  throw()
# define THROW(x) throw x
#endif

// various utility functions
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 void min_it (T &a, U b) {    a = 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 max_it (T &a, U b) {    a = a > (T)b ? a : (T)b; }

template<typename T, typename U, typename V> static inline T    clamp    (T  v, U a, V b) { return v < (T)a ? a : v >(T)b ? b : v; }
template<typename T, typename U, typename V> static inline void clamp_it (T &v, U a, V b) {    v = v < (T)a ? a : v >(T)b ? b : v; }

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

template<typename T> static inline T squared_diff (T a, T b) { return (a-b)*(a-b); }

// linear interpolation
template<typename T, typename U, typename P>
static inline
T lerp (T a, U b, P p)
{
  return (long(a) * long(100 - p) + long(b) * long(p) + 50) / 100;
}

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

  return first;
}

// return a very temporary (and never deallocated) buffer. keep small.
void *rxvt_temp_buf (int len);

template<typename T>
static inline T *
rxvt_temp_buf (int len)
{
  return (T *)rxvt_temp_buf (len * sizeof (T));
}

// in range including end
#define IN_RANGE_INC(val,beg,end) \
  ((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg))

// in range excluding end
#define IN_RANGE_EXC(val,beg,end) \
  ((unsigned int)(val) - (unsigned int)(beg) <  (unsigned int)(end) - (unsigned int)(beg))

// for m >= -n, ensure remainder lies between 0..n-1
#define MOD(m,n) (((m) + (n)) % (n))

// makes dynamically allocated objects zero-initialised
struct zero_initialized
{
  void *operator new (size_t s);
  void operator delete (void *p, size_t s);
};

/* 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>
{
};

struct stringvec : simplevec<char *>
{
  ~stringvec ()
  {
    for (char **c = begin (); c != end (); c++)
      free (*c);
  }
};

#if 0
template<typename T>
struct rxvt_vec : simplevec<void *>
{
  typedef T *iterator;

  void push_back (T d) { simplevec<void *>::push_back ((void *)d); }
  T pop_back () { return (T*)simplevec<void *>::pop_back (); }
  void erase (int i) { erase (begin () + i); }
  void erase (iterator i) { simplevec<void *>::erase ((void **)i); }
  iterator begin () const { return (iterator)simplevec<void *>::begin (); }
  iterator end () const { return (iterator)simplevec<void *>::end (); }
  T &operator [] (int i) { return * (T *) (& ((* (simplevec<void *> *)this)[i])); }
  const T &operator [] (int i) const { return * (const T *) (& ((* (const simplevec<void *> *)this)[i])); }
};
#endif

template<typename T>
struct auto_ptr
{
  T *p;

  auto_ptr () : p (0) { }
  auto_ptr (T *a) : p (a) { }

  auto_ptr (auto_ptr<T> &a)
  {
    p = a.p;
    a.p = 0;
  }

  template<typename A>
  auto_ptr (auto_ptr<A> &a)
  {
    p = a.p;
    a.p = 0;
  }

  ~auto_ptr ()
  {
    delete p;
  }

  // void because it makes sense in our context
  void operator = (T *a)
  {
    delete p;
    p = a;
  }

  void operator = (auto_ptr &a)
  {
    *this = a.p;
    a.p = 0;
  }

  template<typename A>
  void operator = (auto_ptr<A> &a)
  {
    *this = a.p;
    a.p = 0;
  }

  operator T * () const { return p; }

  T *operator -> () const { return p; }
  T &operator * () const { return *p; }

  T *get ()
  {
    T *r = p;
    p = 0;
    return r;
  }
};

typedef auto_ptr<char> auto_str;

#endif

Revision:	1.45
Committed:	Mon May 30 18:39:04 2011 UTC (13 years ago) by sf-exg
Content type:	text/plain
Branch:	MAIN
Changes since 1.44:	+1 -51 lines
Log Message:	Migrate to libecb.
#	User	Rev	Content
1	root	1.1	#ifndef RXVT_UTIL_H
2			#define RXVT_UTIL_H
3
4	root	1.19	#include <cstdlib>
5	root	1.4	#include <cstring>
6	root	1.42	#include <inttypes.h>
7	sf-exg	1.45	#include "ecb.h"
8	root	1.4
9	root	1.27	using namespace std;
10
11	root	1.24	// increases code size unless -fno-enforce-eh-specs
12			#if __GNUC__
13			# define NOTHROW
14			# define THROW(x)
15			#else
16			# define NOTHROW throw()
17			# define THROW(x) throw x
18			#endif
19
20	root	1.16	// various utility functions
21	root	1.13	template<typename T, typename U> static inline T min (T a, U b) { return a < (T)b ? a : (T)b; }
22			template<typename T, typename U> static inline void min_it (T &a, U b) { a = a < (T)b ? a : (T)b; }
23			template<typename T, typename U> static inline T max (T a, U b) { return a > (T)b ? a : (T)b; }
24			template<typename T, typename U> static inline void max_it (T &a, U b) { a = a > (T)b ? a : (T)b; }
25
26			template<typename T, typename U, typename V> static inline T clamp (T v, U a, V b) { return v < (T)a ? a : v >(T)b ? b : v; }
27			template<typename T, typename U, typename V> static inline void clamp_it (T &v, U a, V b) { v = v < (T)a ? a : v >(T)b ? b : v; }
28
29	root	1.14	template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; }
30	root	1.8
31	root	1.25	template<typename T> static inline T squared_diff (T a, T b) { return (a-b)*(a-b); }
32
33	root	1.21	// linear interpolation
34			template<typename T, typename U, typename P>
35			static inline
36			T lerp (T a, U b, P p)
37			{
38	root	1.26	return (long(a) * long(100 - p) + long(b) * long(p) + 50) / 100;
39	root	1.21	}
40
41	ayin	1.32	template <typename I, typename T>
42			I find (I first, I last, const T& value)
43			{
44			while (first != last && *first != value)
45			++first;
46
47			return first;
48			}
49
50			// return a very temporary (and never deallocated) buffer. keep small.
51			void *rxvt_temp_buf (int len);
52
53			template<typename T>
54			static inline T *
55			rxvt_temp_buf (int len)
56			{
57			return (T )rxvt_temp_buf (len sizeof (T));
58			}
59
60	root	1.11	// in range including end
61			#define IN_RANGE_INC(val,beg,end) \
62	root	1.9	((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg))
63	root	1.1
64	root	1.11	// in range excluding end
65			#define IN_RANGE_EXC(val,beg,end) \
66			((unsigned int)(val) - (unsigned int)(beg) < (unsigned int)(end) - (unsigned int)(beg))
67
68	ayin	1.36	// for m >= -n, ensure remainder lies between 0..n-1
69			#define MOD(m,n) (((m) + (n)) % (n))
70
71	root	1.16	// makes dynamically allocated objects zero-initialised
72	root	1.38	struct zero_initialized
73			{
74	root	1.4	void *operator new (size_t s);
75			void operator delete (void *p, size_t s);
76			};
77
78			/* simplevec taken (and heavily modified), from:
79	ayin	1.29	*
80	root	1.4	* MICO --- a free CORBA implementation
81			* Copyright (C) 1997-98 Kay Roemer & Arno Puder
82			*/
83			template<class T>
84	root	1.38	struct simplevec
85			{
86	root	1.4	typedef T* iterator;
87			typedef const T* const_iterator;
88			typedef unsigned long size_type;
89
90			private:
91			size_type _last, _size;
92			T *_buf;
93
94			public:
95			const_iterator begin () const
96			{
97	root	1.8	return &_buf[0];
98	root	1.4	}
99			iterator begin ()
100			{
101	root	1.8	return &_buf[0];
102	root	1.4	}
103			const_iterator end () const
104			{
105	root	1.8	return &_buf[_last];
106	root	1.4	}
107			iterator end ()
108			{
109	root	1.8	return &_buf[_last];
110	root	1.4	}
111			size_type capacity () const
112			{
113	root	1.8	return _size;
114	root	1.4	}
115			size_type size () const
116			{
117	root	1.8	return _last;
118	root	1.4	}
119
120			private:
121			static T *alloc (size_type n)
122			{
123	root	1.8	return (T )::operator new ((size_t) (n sizeof (T)));
124	root	1.4	}
125			static void dealloc (T *buf)
126			{
127	root	1.8	if (buf)
128			::operator delete (buf);
129	root	1.4	}
130
131			void reserve (iterator where, size_type n)
132			{
133	root	1.8	if (_last + n <= _size) {
134			memmove (where+n, where, (end ()-where)*sizeof (T));
135			} else {
136			size_type sz = _last+n;
137			sz = (_size == 0) ? max (sz, 5) : max (sz, 2*_size);
138			T *nbuf = alloc (sz);
139			if (_buf) {
140			memcpy (nbuf, begin (), (where-begin ())*sizeof (T));
141			memcpy (nbuf + (where-begin ()) + n, where,
142			(end ()-where)*sizeof (T));
143			dealloc (_buf);
144			}
145			_buf = nbuf;
146			_size = sz;
147			}
148	root	1.4	}
149
150			public:
151			void reserve (size_type sz)
152			{
153	root	1.8	if (_size < sz) {
154			sz = (_size == 0) ? max (sz, 5) : max (sz, 2*_size);
155			T *nbuf = alloc (sz);
156			if (_buf) {
157			memcpy (nbuf, begin (), size ()*sizeof (T));
158			dealloc (_buf);
159			}
160			_buf = nbuf;
161			_size = sz;
162			}
163	root	1.4	}
164			simplevec ()
165			: _last(0), _size(0), _buf(0)
166			{
167			}
168			simplevec (size_type n, const T& t = T ())
169			: _last(0), _size(0), _buf(0)
170			{
171	root	1.8	insert (begin (), n, t);
172	root	1.4	}
173			simplevec (const_iterator first, const_iterator last)
174			: _last(0), _size(0), _buf(0)
175			{
176	root	1.8	insert (begin (), first, last);
177	root	1.4	}
178			simplevec (const simplevec<T> &v)
179			: _last(0), _size(0), _buf(0)
180			{
181	root	1.8	reserve (v._last);
182			memcpy (_buf, v.begin (), v.size ()*sizeof (T));
183			_last = v._last;
184	root	1.4	}
185			simplevec<T> &operator= (const simplevec<T> &v)
186			{
187	root	1.8	if (this != &v) {
188			_last = 0;
189			reserve (v._last);
190			memcpy (_buf, v.begin (), v.size ()*sizeof (T));
191			_last = v._last;
192			}
193	root	1.4	return *this;
194			}
195			~simplevec ()
196			{
197	root	1.8	dealloc (_buf);
198	root	1.4	}
199			const T &front () const
200			{
201	root	1.8	//ministl_assert (size () > 0);
202			return _buf[0];
203	root	1.4	}
204			T &front ()
205			{
206	root	1.8	//ministl_assert (size () > 0);
207			return _buf[0];
208	root	1.4	}
209			const T &back () const
210			{
211	root	1.8	//ministl_assert (size () > 0);
212			return _buf[_last-1];
213	root	1.4	}
214			T &back ()
215			{
216	root	1.8	//ministl_assert (size () > 0);
217			return _buf[_last-1];
218	root	1.4	}
219			bool empty () const
220			{
221	root	1.8	return _last == 0;
222	root	1.4	}
223			void clear ()
224			{
225	root	1.8	_last = 0;
226	root	1.4	}
227			void push_back (const T &t)
228			{
229	root	1.8	reserve (_last+1);
230			*end () = t;
231			++_last;
232	root	1.4	}
233			void push_back (T &t)
234			{
235	root	1.8	reserve (_last+1);
236			*end () = t;
237			++_last;
238	root	1.4	}
239			void pop_back ()
240			{
241	root	1.8	//ministl_assert (size () > 0);
242			--_last;
243	root	1.4	}
244			const T &operator[] (size_type idx) const
245			{
246	root	1.8	//ministl_assert (idx < size ());
247			return _buf[idx];
248	root	1.4	}
249			T &operator[] (size_type idx)
250			{
251	root	1.8	//ministl_assert (idx < size ());
252			return _buf[idx];
253	root	1.4	}
254			iterator insert (iterator pos, const T &t)
255			{
256	root	1.8	//ministl_assert (pos <= end ());
257			long at = pos - begin ();
258			reserve (pos, 1);
259			pos = begin ()+at;
260			*pos = t;
261			++_last;
262			return pos;
263	root	1.4	}
264			iterator insert (iterator pos, const_iterator first, const_iterator last)
265			{
266			//ministl_assert (pos <= end ());
267	root	1.8	long n = last - first;
268			long at = pos - begin ();
269			if (n > 0) {
270			reserve (pos, n);
271			pos = begin ()+at;
272			memcpy (pos, first, (last-first)*sizeof (T));
273			_last += n;
274			}
275			return pos;
276	root	1.4	}
277			iterator insert (iterator pos, size_type n, const T &t)
278			{
279			//ministl_assert (pos <= end ());
280	root	1.8	long at = pos - begin ();
281			if (n > 0) {
282			reserve (pos, n);
283			pos = begin ()+at;
284			for (int i = 0; i < n; ++i)
285			pos[i] = t;
286			_last += n;
287			}
288			return pos;
289	root	1.4	}
290			void erase (iterator first, iterator last)
291			{
292	root	1.8	if (last != first) {
293	root	1.18	memmove (first, last, (end () - last) * sizeof (T));
294	root	1.8	_last -= last - first;
295			}
296	root	1.4	}
297			void erase (iterator pos)
298			{
299			if (pos != end ()) {
300	root	1.18	memmove (pos, pos+1, (end () - (pos+1)) * sizeof (T));
301	root	1.4	--_last;
302			}
303			}
304	root	1.8	void swap (simplevec<T> &t)
305			{
306			::swap(_last, t._last);
307			::swap(_size, t._size);
308			::swap(_buf, t._buf);
309			}
310	root	1.4	};
311
312			template<class T>
313			bool operator== (const simplevec<T> &v1, const simplevec<T> &v2)
314			{
315			if (v1.size () != v2.size ())
316	root	1.8	return false;
317	root	1.4	return !v1.size () \|\| !memcmp (&v1[0], &v2[0], v1.size ()*sizeof (T));
318			}
319
320			template<class T>
321			bool operator< (const simplevec<T> &v1, const simplevec<T> &v2)
322			{
323			unsigned long minlast = min (v1.size (), v2.size ());
324			for (unsigned long i = 0; i < minlast; ++i) {
325			if (v1[i] < v2[i])
326	root	1.8	return true;
327			if (v2[i] < v1[i])
328			return false;
329	root	1.4	}
330			return v1.size () < v2.size ();
331			}
332
333	root	1.1
334			template<typename T>
335			struct vector : simplevec<T>
336	root	1.35	{
337			};
338	root	1.1
339	ayin	1.32	struct stringvec : simplevec<char *>
340			{
341			~stringvec ()
342			{
343			for (char **c = begin (); c != end (); c++)
344			free (*c);
345			}
346			};
347
348	root	1.34	#if 0
349	root	1.1	template<typename T>
350	root	1.38	struct rxvt_vec : simplevec<void *>
351			{
352	root	1.1	typedef T *iterator;
353
354			void push_back (T d) { simplevec<void >::push_back ((void )d); }
355			T pop_back () { return (T)simplevec<void >::pop_back (); }
356			void erase (int i) { erase (begin () + i); }
357			void erase (iterator i) { simplevec<void >::erase ((void *)i); }
358			iterator begin () const { return (iterator)simplevec<void *>::begin (); }
359			iterator end () const { return (iterator)simplevec<void *>::end (); }
360			T &operator [] (int i) { return * (T ) (& (( (simplevec<void > )this)[i])); }
361			const T &operator [] (int i) const { return * (const T ) (& (( (const simplevec<void > )this)[i])); }
362			};
363	root	1.34	#endif
364	root	1.1
365			template<typename T>
366	root	1.38	struct auto_ptr
367			{
368	root	1.1	T *p;
369
370			auto_ptr () : p (0) { }
371			auto_ptr (T *a) : p (a) { }
372
373			auto_ptr (auto_ptr<T> &a)
374			{
375			p = a.p;
376			a.p = 0;
377			}
378
379			template<typename A>
380			auto_ptr (auto_ptr<A> &a)
381			{
382			p = a.p;
383			a.p = 0;
384			}
385
386			~auto_ptr ()
387			{
388			delete p;
389			}
390
391			// void because it makes sense in our context
392			void operator = (T *a)
393			{
394			delete p;
395			p = a;
396			}
397
398			void operator = (auto_ptr &a)
399			{
400			*this = a.p;
401			a.p = 0;
402			}
403
404			template<typename A>
405			void operator = (auto_ptr<A> &a)
406			{
407			*this = a.p;
408			a.p = 0;
409			}
410
411			operator T * () const { return p; }
412
413			T *operator -> () const { return p; }
414			T &operator * () const { return *p; }
415
416			T *get ()
417			{
418			T *r = p;
419			p = 0;
420			return r;
421			}
422			};
423
424			typedef auto_ptr<char> auto_str;
425	root	1.20
426	root	1.1	#endif
427