1 | #ifndef RXVT_UTIL_H |
1 | #ifndef RXVT_UTIL_H |
2 | #define RXVT_UTIL_H |
2 | #define RXVT_UTIL_H |
3 | |
3 | |
4 | extern class byteorder { |
4 | #include <new> |
5 | static unsigned int e; // at least 32 bits |
5 | #include <stdlib.h> |
6 | public: |
6 | #include <string.h> |
7 | byteorder (); |
7 | #include "ecb.h" |
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8 | #include "estl.h" |
8 | |
9 | |
9 | static bool big_endian () { return e == 0x11223344; }; |
10 | #include "emman.h" |
10 | static bool network () { return e == 0x11223344; }; |
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11 | static bool little_endian () { return e == 0x44332211; }; |
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12 | static bool vax () { return e == 0x44332211; }; |
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13 | } byteorder; |
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14 | |
11 | |
15 | template<typename T, typename U> |
12 | // increases code size unless -fno-enforce-eh-specs |
16 | static inline T min (T a, U b) { return a < b ? a : (T)b; } |
13 | #if __GNUC__ |
17 | template<typename T, typename U> |
14 | # define NOTHROW |
18 | static inline T max (T a, U b) { return a > b ? a : (T)b; } |
15 | # define THROW(x) |
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16 | #else |
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17 | # define NOTHROW throw() |
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18 | # define THROW(x) throw x |
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19 | #endif |
19 | |
20 | |
20 | #include "simplevec.h" |
21 | // various utility functions |
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22 | template<typename T, typename U> static inline void min_it (T &a, U b) { a = a < (T)b ? a : (T)b; } |
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23 | template<typename T, typename U> static inline void max_it (T &a, U b) { a = a > (T)b ? a : (T)b; } |
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24 | |
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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; } |
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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; } |
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27 | |
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28 | template<typename T> static inline T squared_diff (T a, T b) { return (a - b) * (a - b); } |
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29 | |
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30 | // linear interpolation |
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31 | template<typename T, typename U, typename P> |
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32 | static inline T |
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33 | lerp (T a, U b, P p) |
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34 | { |
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35 | return (long(a) * long(100 - p) + long(b) * long(p) + 50) / 100; |
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36 | } |
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37 | |
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38 | // return a very temporary (and never deallocated) buffer. keep small. |
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39 | void *rxvt_temp_buf (int len); |
21 | |
40 | |
22 | template<typename T> |
41 | template<typename T> |
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42 | static inline T * |
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43 | rxvt_temp_buf (int len) |
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44 | { |
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45 | return (T *)rxvt_temp_buf (len * sizeof (T)); |
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46 | } |
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47 | |
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48 | // in range including end |
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49 | #define IN_RANGE_INC(val,beg,end) \ |
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50 | ((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg)) |
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51 | |
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52 | // in range excluding end |
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53 | #define IN_RANGE_EXC(val,beg,end) \ |
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54 | ((unsigned int)(val) - (unsigned int)(beg) < (unsigned int)(end) - (unsigned int)(beg)) |
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55 | |
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56 | // for m >= -n, ensure remainder lies between 0..n-1 |
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57 | #define MOD(m,n) (((m) + (n)) % (n)) |
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58 | |
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59 | // makes dynamically allocated objects zero-initialised |
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60 | struct zero_initialized |
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61 | { |
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62 | void *operator new (size_t s); |
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63 | void operator delete (void *p, size_t s); |
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64 | }; |
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65 | |
23 | struct vector : simplevec<T> |
66 | struct stringvec : simplevec<char *> |
24 | { }; |
67 | { |
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68 | ~stringvec () |
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69 | { |
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70 | for (char **c = begin (); c != end (); c++) |
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71 | free (*c); |
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72 | } |
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73 | }; |
25 | |
74 | |
26 | #if 0 |
75 | #if 0 |
27 | template<typename T> |
76 | template<typename T> |
28 | struct rxvt_vec : simplevec<void *> { |
77 | struct rxvt_vec : simplevec<void *> |
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78 | { |
29 | typedef T *iterator; |
79 | typedef T *iterator; |
30 | |
80 | |
31 | void push_back (T d) { simplevec<void *>::push_back ((void *)d); } |
81 | void push_back (T d) { simplevec<void *>::push_back ((void *)d); } |
32 | T pop_back () { return (T*)simplevec<void *>::pop_back (); } |
82 | T pop_back () { return (T*)simplevec<void *>::pop_back (); } |
33 | void erase (int i) { erase (begin () + i); } |
83 | void erase (int i) { erase (begin () + i); } |
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37 | T &operator [] (int i) { return * (T *) (& ((* (simplevec<void *> *)this)[i])); } |
87 | T &operator [] (int i) { return * (T *) (& ((* (simplevec<void *> *)this)[i])); } |
38 | const T &operator [] (int i) const { return * (const T *) (& ((* (const simplevec<void *> *)this)[i])); } |
88 | const T &operator [] (int i) const { return * (const T *) (& ((* (const simplevec<void *> *)this)[i])); } |
39 | }; |
89 | }; |
40 | #endif |
90 | #endif |
41 | |
91 | |
42 | template <typename I, typename T> |
92 | inline void * |
43 | I find (I first, I last, const T& value) |
93 | operator new (size_t size) throw (std::bad_alloc) |
44 | { |
94 | { |
45 | while (first != last && *first != value) |
95 | // TODO: use rxvt_malloc |
46 | ++first; |
96 | return malloc (size); |
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97 | } |
47 | |
98 | |
48 | return first; |
99 | inline void |
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100 | operator delete (void *p) throw () |
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101 | { |
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102 | free (p); |
49 | } |
103 | } |
50 | |
104 | |
51 | template<typename T> |
105 | template<typename T> |
52 | struct auto_ptr { |
106 | struct auto_ptr |
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107 | { |
53 | T *p; |
108 | T *p; |
54 | |
109 | |
55 | auto_ptr () : p (0) { } |
110 | auto_ptr () : p (0) { } |
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111 | |
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112 | explicit |
56 | auto_ptr (T *a) : p (a) { } |
113 | auto_ptr (T *a) : p (a) { } |
57 | |
114 | |
58 | auto_ptr (auto_ptr<T> &a) |
115 | auto_ptr (auto_ptr &a) |
59 | { |
116 | { |
60 | p = a.p; |
117 | p = a.p; |
61 | a.p = 0; |
118 | a.p = 0; |
62 | } |
119 | } |
63 | |
120 | |
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71 | ~auto_ptr () |
128 | ~auto_ptr () |
72 | { |
129 | { |
73 | delete p; |
130 | delete p; |
74 | } |
131 | } |
75 | |
132 | |
76 | // void because it makes sense in our context |
133 | void reset (T *a) |
77 | void operator = (T *a) |
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78 | { |
134 | { |
79 | delete p; |
135 | delete p; |
80 | p = a; |
136 | p = a; |
81 | } |
137 | } |
82 | |
138 | |
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139 | // void because it makes sense in our context |
83 | void operator = (auto_ptr &a) |
140 | void operator =(auto_ptr &a) |
84 | { |
141 | { |
85 | *this = a.p; |
142 | reset (a.release ()); |
86 | a.p = 0; |
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87 | } |
143 | } |
88 | |
144 | |
89 | template<typename A> |
145 | template<typename A> |
90 | void operator = (auto_ptr<A> &a) |
146 | void operator =(auto_ptr<A> &a) |
91 | { |
147 | { |
92 | *this = a.p; |
148 | reset (a.release ()); |
93 | a.p = 0; |
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94 | } |
149 | } |
95 | |
150 | |
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151 | T *operator ->() const { return p; } |
96 | operator T * () const { return p; } |
152 | T &operator *() const { return *p; } |
97 | |
153 | |
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154 | operator T *() { return p; } |
98 | T *operator -> () const { return p; } |
155 | T *get () const { return p; } |
99 | T &operator * () const { return *p; } |
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100 | |
156 | |
101 | T *get () |
157 | T *release() |
102 | { |
158 | { |
103 | T *r = p; |
159 | T *r = p; |
104 | p = 0; |
160 | p = 0; |
105 | return r; |
161 | return r; |
106 | } |
162 | } |
107 | }; |
163 | }; |
108 | |
164 | |
109 | typedef auto_ptr<char> auto_str; |
165 | typedef auto_ptr<char> auto_str; |
110 | |
166 | |
111 | struct stringvec : simplevec<char *> |
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112 | { |
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113 | ~stringvec () |
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114 | { |
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115 | for (char **c = begin (); c != end (); c++) |
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116 | delete [] *c; |
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117 | } |
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118 | }; |
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119 | #endif |
167 | #endif |
120 | |
168 | |