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"

#include "emman.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);
};

// alas new/delete cannot be specified as inline in C++11 (see 17.6.4.6)
void *operator new (size_t s) throw (std::bad_alloc);
void operator delete (void *p) throw ();

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) { }

  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:	1.60
Committed:	Tue Oct 28 09:05:33 2014 UTC (9 years, 7 months ago) by sf-exg
Content type:	text/plain
Branch:	MAIN
Changes since 1.59:	+4 -13 lines
Log Message:	It is not legal to specify new/delete as inline in C++11.
#	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	1.58	#include "emman.h"
11
12	root	1.24	// increases code size unless -fno-enforce-eh-specs
13			#if __GNUC__
14			# define NOTHROW
15			# define THROW(x)
16			#else
17			# define NOTHROW throw()
18			# define THROW(x) throw x
19			#endif
20
21	root	1.16	// various utility functions
22	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; }
23			template<typename T, typename U> static inline void max_it (T &a, U b) { a = a > (T)b ? a : (T)b; }
24	root	1.13
25			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; }
26			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; }
27
28	sf-exg	1.51	template<typename T> static inline T squared_diff (T a, T b) { return (a - b) * (a - b); }
29	root	1.25
30	root	1.21	// linear interpolation
31			template<typename T, typename U, typename P>
32	root	1.55	static inline T
33			lerp (T a, U b, P p)
34	root	1.21	{
35	root	1.26	return (long(a) * long(100 - p) + long(b) * long(p) + 50) / 100;
36	root	1.21	}
37
38	ayin	1.32	// return a very temporary (and never deallocated) buffer. keep small.
39			void *rxvt_temp_buf (int len);
40
41			template<typename T>
42			static inline T *
43			rxvt_temp_buf (int len)
44			{
45			return (T )rxvt_temp_buf (len sizeof (T));
46			}
47
48	root	1.11	// in range including end
49			#define IN_RANGE_INC(val,beg,end) \
50	root	1.9	((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg))
51	root	1.1
52	root	1.11	// in range excluding end
53			#define IN_RANGE_EXC(val,beg,end) \
54			((unsigned int)(val) - (unsigned int)(beg) < (unsigned int)(end) - (unsigned int)(beg))
55
56	ayin	1.36	// for m >= -n, ensure remainder lies between 0..n-1
57			#define MOD(m,n) (((m) + (n)) % (n))
58
59	root	1.16	// makes dynamically allocated objects zero-initialised
60	root	1.38	struct zero_initialized
61			{
62	root	1.4	void *operator new (size_t s);
63			void operator delete (void *p, size_t s);
64			};
65
66	sf-exg	1.60	// alas new/delete cannot be specified as inline in C++11 (see 17.6.4.6)
67			void *operator new (size_t s) throw (std::bad_alloc);
68			void operator delete (void *p) throw ();
69
70	ayin	1.32	struct stringvec : simplevec<char *>
71			{
72			~stringvec ()
73			{
74			for (char **c = begin (); c != end (); c++)
75			free (*c);
76			}
77			};
78
79	root	1.34	#if 0
80	root	1.1	template<typename T>
81	root	1.38	struct rxvt_vec : simplevec<void *>
82			{
83	root	1.1	typedef T *iterator;
84
85			void push_back (T d) { simplevec<void >::push_back ((void )d); }
86			T pop_back () { return (T)simplevec<void >::pop_back (); }
87			void erase (int i) { erase (begin () + i); }
88			void erase (iterator i) { simplevec<void >::erase ((void *)i); }
89			iterator begin () const { return (iterator)simplevec<void *>::begin (); }
90			iterator end () const { return (iterator)simplevec<void *>::end (); }
91			T &operator [] (int i) { return * (T ) (& (( (simplevec<void > )this)[i])); }
92			const T &operator [] (int i) const { return * (const T ) (& (( (const simplevec<void > )this)[i])); }
93			};
94	root	1.34	#endif
95	root	1.1
96			template<typename T>
97	root	1.38	struct auto_ptr
98			{
99	root	1.1	T *p;
100
101	root	1.55	auto_ptr () : p (0) { }
102
103			explicit
104	root	1.1	auto_ptr (T *a) : p (a) { }
105
106	root	1.56	auto_ptr (auto_ptr &a)
107	root	1.1	{
108			p = a.p;
109			a.p = 0;
110			}
111
112			template<typename A>
113			auto_ptr (auto_ptr<A> &a)
114			{
115			p = a.p;
116			a.p = 0;
117			}
118
119			~auto_ptr ()
120			{
121	root	1.55	delete p;
122	root	1.1	}
123
124	sf-exg	1.54	void reset (T *a)
125	root	1.1	{
126	root	1.55	delete p;
127	root	1.1	p = a;
128			}
129
130	sf-exg	1.54	// void because it makes sense in our context
131	root	1.55	void operator =(auto_ptr &a)
132	root	1.1	{
133	sf-exg	1.57	reset (a.release ());
134	root	1.1	}
135
136			template<typename A>
137	root	1.55	void operator =(auto_ptr<A> &a)
138	root	1.1	{
139	sf-exg	1.57	reset (a.release ());
140	root	1.1	}
141
142	root	1.55	T *operator ->() const { return p; }
143			T &operator () const { return p; }
144	root	1.1
145	root	1.55	operator T *() { return p; }
146			T *get () const { return p; }
147	root	1.1
148	root	1.55	T *release()
149	root	1.1	{
150			T *r = p;
151			p = 0;
152			return r;
153			}
154			};
155
156			typedef auto_ptr<char> auto_str;
157	root	1.20
158	root	1.1	#endif
159