rxvt-unicode/src/rxvtutil.h

#ifndef RXVT_UTIL_H
#define RXVT_UTIL_H

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

#define ECB_NO_THREADS 1
#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; }

// 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

typedef estl::scoped_array<char> auto_str;

#endif

Revision:	1.64
Committed:	Tue Jun 25 03:35:01 2019 UTC (5 years ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.63:	+3 -0 lines
Log Message:	* empty log message *
#	User	Rev	Content
1	root	1.1	#ifndef RXVT_UTIL_H
2			#define RXVT_UTIL_H
3
4	sf-exg	1.47	#include <stdlib.h>
5			#include <string.h>
6	root	1.64
7			#define ECB_NO_THREADS 1
8	sf-exg	1.45	#include "ecb.h"
9	root	1.64
10	sf-exg	1.49	#include "estl.h"
11	root	1.4
12	root	1.58	#include "emman.h"
13
14	root	1.24	// increases code size unless -fno-enforce-eh-specs
15			#if __GNUC__
16			# define NOTHROW
17			# define THROW(x)
18			#else
19			# define NOTHROW throw()
20			# define THROW(x) throw x
21			#endif
22
23	root	1.16	// various utility functions
24	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; }
25			template<typename T, typename U> static inline void max_it (T &a, U b) { a = a > (T)b ? a : (T)b; }
26	root	1.13
27			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; }
28			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; }
29
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	ayin	1.32	struct stringvec : simplevec<char *>
67			{
68			~stringvec ()
69			{
70			for (char **c = begin (); c != end (); c++)
71			free (*c);
72			}
73			};
74
75	root	1.34	#if 0
76	root	1.1	template<typename T>
77	root	1.38	struct rxvt_vec : simplevec<void *>
78			{
79	root	1.1	typedef T *iterator;
80
81			void push_back (T d) { simplevec<void >::push_back ((void )d); }
82			T pop_back () { return (T)simplevec<void >::pop_back (); }
83			void erase (int i) { erase (begin () + i); }
84			void erase (iterator i) { simplevec<void >::erase ((void *)i); }
85			iterator begin () const { return (iterator)simplevec<void *>::begin (); }
86			iterator end () const { return (iterator)simplevec<void *>::end (); }
87			T &operator [] (int i) { return * (T ) (& (( (simplevec<void > )this)[i])); }
88			const T &operator [] (int i) const { return * (const T ) (& (( (const simplevec<void > )this)[i])); }
89			};
90	root	1.34	#endif
91	root	1.1
92	sf-exg	1.61	typedef estl::scoped_array<char> auto_str;
93	root	1.20
94	root	1.1	#endif
95