1 | #ifndef RXVT_UTIL_H |
1 | #ifndef RXVT_UTIL_H |
2 | #define RXVT_UTIL_H |
2 | #define RXVT_UTIL_H |
3 | |
3 | |
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4 | #include <new> |
4 | #include <stdlib.h> |
5 | #include <stdlib.h> |
5 | #include <string.h> |
6 | #include <string.h> |
6 | #include "ecb.h" |
7 | #include "ecb.h" |
7 | #include "estl.h" |
8 | #include "estl.h" |
8 | |
9 | |
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24 | |
25 | |
25 | template<typename T> static inline T squared_diff (T a, T b) { return (a - b) * (a - b); } |
26 | template<typename T> static inline T squared_diff (T a, T b) { return (a - b) * (a - b); } |
26 | |
27 | |
27 | // linear interpolation |
28 | // linear interpolation |
28 | template<typename T, typename U, typename P> |
29 | template<typename T, typename U, typename P> |
29 | static inline |
30 | static inline T |
30 | T lerp (T a, U b, P p) |
31 | lerp (T a, U b, P p) |
31 | { |
32 | { |
32 | return (long(a) * long(100 - p) + long(b) * long(p) + 50) / 100; |
33 | return (long(a) * long(100 - p) + long(b) * long(p) + 50) / 100; |
33 | } |
34 | } |
34 | |
35 | |
35 | // return a very temporary (and never deallocated) buffer. keep small. |
36 | // return a very temporary (and never deallocated) buffer. keep small. |
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84 | T &operator [] (int i) { return * (T *) (& ((* (simplevec<void *> *)this)[i])); } |
85 | T &operator [] (int i) { return * (T *) (& ((* (simplevec<void *> *)this)[i])); } |
85 | 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])); } |
86 | }; |
87 | }; |
87 | #endif |
88 | #endif |
88 | |
89 | |
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90 | inline void * |
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91 | operator new (size_t size) |
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92 | { |
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93 | // TODO: use rxvt_malloc |
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94 | return malloc (size); |
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95 | } |
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96 | |
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97 | inline void |
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98 | operator delete (void *p) |
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99 | { |
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100 | free (p); |
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101 | } |
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102 | |
89 | template<typename T> |
103 | template<typename T> |
90 | struct auto_ptr |
104 | struct auto_ptr |
91 | { |
105 | { |
92 | T *p; |
106 | T *p; |
93 | |
107 | |
94 | auto_ptr () : p (0) { } |
108 | auto_ptr () : p (0) { } |
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109 | |
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110 | explicit |
95 | auto_ptr (T *a) : p (a) { } |
111 | auto_ptr (T *a) : p (a) { } |
96 | |
112 | |
97 | auto_ptr (auto_ptr<T> &a) |
113 | auto_ptr (auto_ptr<T> &a) |
98 | { |
114 | { |
99 | p = a.p; |
115 | p = a.p; |
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107 | a.p = 0; |
123 | a.p = 0; |
108 | } |
124 | } |
109 | |
125 | |
110 | ~auto_ptr () |
126 | ~auto_ptr () |
111 | { |
127 | { |
112 | free (p); |
128 | delete p; |
113 | } |
129 | } |
114 | |
130 | |
115 | void reset (T *a) |
131 | void reset (T *a) |
116 | { |
132 | { |
117 | free (p); |
133 | delete p; |
118 | p = a; |
134 | p = a; |
119 | } |
135 | } |
120 | |
136 | |
121 | // void because it makes sense in our context |
137 | // void because it makes sense in our context |
122 | void operator = (auto_ptr &a) |
138 | void operator =(auto_ptr &a) |
123 | { |
139 | { |
124 | *this = a.p; |
140 | *this = a.p; |
125 | a.p = 0; |
141 | a.p = 0; |
126 | } |
142 | } |
127 | |
143 | |
128 | template<typename A> |
144 | template<typename A> |
129 | void operator = (auto_ptr<A> &a) |
145 | void operator =(auto_ptr<A> &a) |
130 | { |
146 | { |
131 | *this = a.p; |
147 | *this = a.p; |
132 | a.p = 0; |
148 | a.p = 0; |
133 | } |
149 | } |
134 | |
150 | |
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151 | T *operator ->() const { return p; } |
135 | operator T * () const { return p; } |
152 | T &operator *() const { return *p; } |
136 | |
153 | |
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154 | operator T *() { return p; } |
137 | T *operator -> () const { return p; } |
155 | T *get () const { return p; } |
138 | T &operator * () const { return *p; } |
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139 | |
156 | |
140 | T *get () |
157 | T *release() |
141 | { |
158 | { |
142 | T *r = p; |
159 | T *r = p; |
143 | p = 0; |
160 | p = 0; |
144 | return r; |
161 | return r; |
145 | } |
162 | } |