rxvt-unicode/src/rxvtutil.h

#ifndef RXVT_UTIL_H
#define RXVT_UTIL_H

#include <new>
#include <stdlib.h>
#include <string.h>
#include "ecb.h"
#include "estl.h"

// 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 void min_it (T &a, U b) { a = 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> 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;
}

// 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);
};

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

inline void *
operator new (size_t size)
{
  // TODO: use rxvt_malloc
  return malloc (size);
}

inline void
operator delete (void *p)
{
  free (p);
}

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

  auto_ptr ()     : p (0) { }

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

  auto_ptr (auto_ptr &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 reset (T *a)
  {
    delete p;
    p = a;
  }

  // void because it makes sense in our context
  void operator =(auto_ptr &a)
  {
    reset (a.release ());
  }

  template<typename A>
  void operator =(auto_ptr<A> &a)
  {
    reset (a.release ());
  }

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

  operator T *()  { return p; }
  T *get () const { return p; }

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

typedef auto_ptr<char> auto_str;

#endif

Revision:	1.57
Committed:	Fri May 25 18:49:59 2012 UTC (14 years, 5 months ago) by sf-exg
Content type:	text/plain
Branch:	MAIN
Changes since 1.56:	+2 -4 lines
Log Message:	Implement auto_ptr '=' operator using reset/release.
#	User	Rev	Content
1	root	1.1	#ifndef RXVT_UTIL_H
2			#define RXVT_UTIL_H
3
4	root	1.55	#include <new>
5	sf-exg	1.47	#include <stdlib.h>
6			#include <string.h>
7	sf-exg	1.45	#include "ecb.h"
8	sf-exg	1.49	#include "estl.h"
9	root	1.4
10	root	1.24	// increases code size unless -fno-enforce-eh-specs
11			#if __GNUC__
12			# define NOTHROW
13			# define THROW(x)
14			#else
15			# define NOTHROW throw()
16			# define THROW(x) throw x
17			#endif
18
19	root	1.16	// various utility functions
20	sf-exg	1.51	template<typename T, typename U> static inline void min_it (T &a, U b) { a = a < (T)b ? a : (T)b; }
21			template<typename T, typename U> static inline void max_it (T &a, U b) { a = a > (T)b ? a : (T)b; }
22	root	1.13
23			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; }
24			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; }
25
26	sf-exg	1.51	template<typename T> static inline T squared_diff (T a, T b) { return (a - b) * (a - b); }
27	root	1.25
28	root	1.21	// linear interpolation
29			template<typename T, typename U, typename P>
30	root	1.55	static inline T
31			lerp (T a, U b, P p)
32	root	1.21	{
33	root	1.26	return (long(a) * long(100 - p) + long(b) * long(p) + 50) / 100;
34	root	1.21	}
35
36	ayin	1.32	// return a very temporary (and never deallocated) buffer. keep small.
37			void *rxvt_temp_buf (int len);
38
39			template<typename T>
40			static inline T *
41			rxvt_temp_buf (int len)
42			{
43			return (T )rxvt_temp_buf (len sizeof (T));
44			}
45
46	root	1.11	// in range including end
47			#define IN_RANGE_INC(val,beg,end) \
48	root	1.9	((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg))
49	root	1.1
50	root	1.11	// in range excluding end
51			#define IN_RANGE_EXC(val,beg,end) \
52			((unsigned int)(val) - (unsigned int)(beg) < (unsigned int)(end) - (unsigned int)(beg))
53
54	ayin	1.36	// for m >= -n, ensure remainder lies between 0..n-1
55			#define MOD(m,n) (((m) + (n)) % (n))
56
57	root	1.16	// makes dynamically allocated objects zero-initialised
58	root	1.38	struct zero_initialized
59			{
60	root	1.4	void *operator new (size_t s);
61			void operator delete (void *p, size_t s);
62			};
63
64	ayin	1.32	struct stringvec : simplevec<char *>
65			{
66			~stringvec ()
67			{
68			for (char **c = begin (); c != end (); c++)
69			free (*c);
70			}
71			};
72
73	root	1.34	#if 0
74	root	1.1	template<typename T>
75	root	1.38	struct rxvt_vec : simplevec<void *>
76			{
77	root	1.1	typedef T *iterator;
78
79			void push_back (T d) { simplevec<void >::push_back ((void )d); }
80			T pop_back () { return (T)simplevec<void >::pop_back (); }
81			void erase (int i) { erase (begin () + i); }
82			void erase (iterator i) { simplevec<void >::erase ((void *)i); }
83			iterator begin () const { return (iterator)simplevec<void *>::begin (); }
84			iterator end () const { return (iterator)simplevec<void *>::end (); }
85			T &operator [] (int i) { return * (T ) (& (( (simplevec<void > )this)[i])); }
86			const T &operator [] (int i) const { return * (const T ) (& (( (const simplevec<void > )this)[i])); }
87			};
88	root	1.34	#endif
89	root	1.1
90	root	1.55	inline void *
91			operator new (size_t size)
92			{
93			// TODO: use rxvt_malloc
94			return malloc (size);
95			}
96
97			inline void
98			operator delete (void *p)
99			{
100			free (p);
101			}
102
103	root	1.1	template<typename T>
104	root	1.38	struct auto_ptr
105			{
106	root	1.1	T *p;
107
108	root	1.55	auto_ptr () : p (0) { }
109
110			explicit
111	root	1.1	auto_ptr (T *a) : p (a) { }
112
113	root	1.56	auto_ptr (auto_ptr &a)
114	root	1.1	{
115			p = a.p;
116			a.p = 0;
117			}
118
119			template<typename A>
120			auto_ptr (auto_ptr<A> &a)
121			{
122			p = a.p;
123			a.p = 0;
124			}
125
126			~auto_ptr ()
127			{
128	root	1.55	delete p;
129	root	1.1	}
130
131	sf-exg	1.54	void reset (T *a)
132	root	1.1	{
133	root	1.55	delete p;
134	root	1.1	p = a;
135			}
136
137	sf-exg	1.54	// void because it makes sense in our context
138	root	1.55	void operator =(auto_ptr &a)
139	root	1.1	{
140	sf-exg	1.57	reset (a.release ());
141	root	1.1	}
142
143			template<typename A>
144	root	1.55	void operator =(auto_ptr<A> &a)
145	root	1.1	{
146	sf-exg	1.57	reset (a.release ());
147	root	1.1	}
148
149	root	1.55	T *operator ->() const { return p; }
150			T &operator () const { return p; }
151	root	1.1
152	root	1.55	operator T *() { return p; }
153			T *get () const { return p; }
154	root	1.1
155	root	1.55	T *release()
156	root	1.1	{
157			T *r = p;
158			p = 0;
159			return r;
160			}
161			};
162
163			typedef auto_ptr<char> auto_str;
164	root	1.20
165	root	1.1	#endif
166