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/cvs/rxvt-unicode/src/rxvtutil.h
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Comparing rxvt-unicode/src/rxvtutil.h (file contents):
Revision 1.1 by root, Sun Aug 15 00:37:04 2004 UTC vs.
Revision 1.55 by root, Fri May 25 07:48:03 2012 UTC

1#ifndef RXVT_UTIL_H 1#ifndef RXVT_UTIL_H
2#define RXVT_UTIL_H 2#define RXVT_UTIL_H
3 3
4extern class byteorder { 4#include <new>
5 static unsigned int e; // at least 32 bits 5#include <stdlib.h>
6public: 6#include <string.h>
7 byteorder (); 7#include "ecb.h"
8#include "estl.h"
8 9
9 static bool big_endian () { return e == 0x11223344; }; 10// increases code size unless -fno-enforce-eh-specs
10 static bool network () { return e == 0x11223344; }; 11#if __GNUC__
11 static bool little_endian () { return e == 0x44332211; }; 12# define NOTHROW
12 static bool vax () { return e == 0x44332211; }; 13# define THROW(x)
13} byteorder; 14#else
15# define NOTHROW throw()
16# define THROW(x) throw x
17#endif
14 18
19// various utility functions
15template<typename T, typename U> static inline T min (T a, U b) { return a < b ? a : b; } 20template<typename T, typename U> static inline void min_it (T &a, U b) { a = a < (T)b ? a : (T)b; }
16template<typename T, typename U> static inline T max (T a, U b) { return a > b ? a : b; } 21template<typename T, typename U> static inline void max_it (T &a, U b) { a = a > (T)b ? a : (T)b; }
17 22
18#include "simplevec.h" 23template<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; }
24template<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
26template<typename T> static inline T squared_diff (T a, T b) { return (a - b) * (a - b); }
27
28// linear interpolation
29template<typename T, typename U, typename P>
30static inline T
31lerp (T a, U b, P p)
32{
33 return (long(a) * long(100 - p) + long(b) * long(p) + 50) / 100;
34}
35
36// return a very temporary (and never deallocated) buffer. keep small.
37void *rxvt_temp_buf (int len);
19 38
20template<typename T> 39template<typename T>
40static inline T *
41rxvt_temp_buf (int len)
42{
43 return (T *)rxvt_temp_buf (len * sizeof (T));
44}
45
46// in range including end
47#define IN_RANGE_INC(val,beg,end) \
48 ((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg))
49
50// 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// for m >= -n, ensure remainder lies between 0..n-1
55#define MOD(m,n) (((m) + (n)) % (n))
56
57// makes dynamically allocated objects zero-initialised
58struct zero_initialized
59{
60 void *operator new (size_t s);
61 void operator delete (void *p, size_t s);
62};
63
21struct vector : simplevec<T> 64struct stringvec : simplevec<char *>
22{ }; 65{
66 ~stringvec ()
67 {
68 for (char **c = begin (); c != end (); c++)
69 free (*c);
70 }
71};
23 72
24#if 0 73#if 0
25template<typename T> 74template<typename T>
26struct rxvt_vec : simplevec<void *> { 75struct rxvt_vec : simplevec<void *>
76{
27 typedef T *iterator; 77 typedef T *iterator;
28 78
29 void push_back (T d) { simplevec<void *>::push_back ((void *)d); } 79 void push_back (T d) { simplevec<void *>::push_back ((void *)d); }
30 T pop_back () { return (T*)simplevec<void *>::pop_back (); } 80 T pop_back () { return (T*)simplevec<void *>::pop_back (); }
31 void erase (int i) { erase (begin () + i); } 81 void erase (int i) { erase (begin () + i); }
… …
35 T &operator [] (int i) { return * (T *) (& ((* (simplevec<void *> *)this)[i])); } 85 T &operator [] (int i) { return * (T *) (& ((* (simplevec<void *> *)this)[i])); }
36 const T &operator [] (int i) const { return * (const T *) (& ((* (const simplevec<void *> *)this)[i])); } 86 const T &operator [] (int i) const { return * (const T *) (& ((* (const simplevec<void *> *)this)[i])); }
37}; 87};
38#endif 88#endif
39 89
40template <typename I, typename T> 90inline void *
41I find (I first, I last, const T& value) 91operator new (size_t size)
42{ 92{
43 while (first != last && *first != value) 93 // TODO: use rxvt_malloc
44 ++first; 94 return malloc (size);
95}
45 96
46 return first; 97inline void
98operator delete (void *p)
99{
100 free (p);
47} 101}
48 102
49template<typename T> 103template<typename T>
50struct auto_ptr { 104struct auto_ptr
105{
51 T *p; 106 T *p;
52 107
53 auto_ptr () : p (0) { } 108 auto_ptr () : p (0) { }
109
110 explicit
54 auto_ptr (T *a) : p (a) { } 111 auto_ptr (T *a) : p (a) { }
55 112
56 auto_ptr (auto_ptr<T> &a) 113 auto_ptr (auto_ptr<T> &a)
57 { 114 {
58 p = a.p; 115 p = a.p;
… …
69 ~auto_ptr () 126 ~auto_ptr ()
70 { 127 {
71 delete p; 128 delete p;
72 } 129 }
73 130
74 // void because it makes sense in our context 131 void reset (T *a)
75 void operator = (T *a)
76 { 132 {
77 delete p; 133 delete p;
78 p = a; 134 p = a;
79 } 135 }
80 136
137 // void because it makes sense in our context
81 void operator = (auto_ptr &a) 138 void operator =(auto_ptr &a)
82 { 139 {
83 *this = a.p; 140 *this = a.p;
84 a.p = 0; 141 a.p = 0;
85 } 142 }
86 143
87 template<typename A> 144 template<typename A>
88 void operator = (auto_ptr<A> &a) 145 void operator =(auto_ptr<A> &a)
89 { 146 {
90 *this = a.p; 147 *this = a.p;
91 a.p = 0; 148 a.p = 0;
92 } 149 }
93 150
151 T *operator ->() const { return p; }
94 operator T * () const { return p; } 152 T &operator *() const { return *p; }
95 153
154 operator T *() { return p; }
96 T *operator -> () const { return p; } 155 T *get () const { return p; }
97 T &operator * () const { return *p; }
98 156
99 T *get () 157 T *release()
100 { 158 {
101 T *r = p; 159 T *r = p;
102 p = 0; 160 p = 0;
103 return r; 161 return r;
104 } 162 }
105}; 163};
106 164
107typedef auto_ptr<char> auto_str; 165typedef auto_ptr<char> auto_str;
108 166
109struct stringvec : simplevec<char *>
110{
111 ~stringvec ()
112 {
113 for (char **c = begin (); c != end (); c++)
114 delete [] *c;
115 }
116};
117#endif 167#endif
118 168

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