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> static inline T min (T a, U b) { return a < b ? a : b; } |
12 | // increases code size unless -fno-enforce-eh-specs |
16 | template<typename T, typename U> static inline T max (T a, U b) { return a > b ? a : b; } |
13 | #if __GNUC__ |
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14 | # define NOTHROW |
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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 |
17 | |
20 | |
18 | #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); |
19 | |
40 | |
20 | 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 | |
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66 | // alas new/delete cannot be specified as inline in C++11 (see 17.6.4.6) |
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67 | void *operator new (size_t s) throw (std::bad_alloc); |
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68 | void operator delete (void *p) throw (); |
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69 | |
21 | struct vector : simplevec<T> |
70 | struct stringvec : simplevec<char *> |
22 | { }; |
71 | { |
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72 | ~stringvec () |
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73 | { |
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74 | for (char **c = begin (); c != end (); c++) |
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75 | free (*c); |
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76 | } |
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77 | }; |
23 | |
78 | |
24 | #if 0 |
79 | #if 0 |
25 | template<typename T> |
80 | template<typename T> |
26 | struct rxvt_vec : simplevec<void *> { |
81 | struct rxvt_vec : simplevec<void *> |
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82 | { |
27 | typedef T *iterator; |
83 | typedef T *iterator; |
28 | |
84 | |
29 | void push_back (T d) { simplevec<void *>::push_back ((void *)d); } |
85 | void push_back (T d) { simplevec<void *>::push_back ((void *)d); } |
30 | T pop_back () { return (T*)simplevec<void *>::pop_back (); } |
86 | T pop_back () { return (T*)simplevec<void *>::pop_back (); } |
31 | void erase (int i) { erase (begin () + i); } |
87 | void erase (int i) { erase (begin () + i); } |
… | |
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35 | T &operator [] (int i) { return * (T *) (& ((* (simplevec<void *> *)this)[i])); } |
91 | 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])); } |
92 | const T &operator [] (int i) const { return * (const T *) (& ((* (const simplevec<void *> *)this)[i])); } |
37 | }; |
93 | }; |
38 | #endif |
94 | #endif |
39 | |
95 | |
40 | template <typename I, typename T> |
96 | typedef estl::scoped_array<char> auto_str; |
41 | I find (I first, I last, const T& value) |
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42 | { |
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43 | while (first != last && *first != value) |
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44 | ++first; |
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45 | |
97 | |
46 | return first; |
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47 | } |
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48 | |
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49 | template<typename T> |
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50 | struct auto_ptr { |
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51 | T *p; |
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52 | |
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53 | auto_ptr () : p (0) { } |
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54 | auto_ptr (T *a) : p (a) { } |
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55 | |
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56 | auto_ptr (auto_ptr<T> &a) |
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57 | { |
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58 | p = a.p; |
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59 | a.p = 0; |
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60 | } |
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61 | |
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62 | template<typename A> |
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63 | auto_ptr (auto_ptr<A> &a) |
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64 | { |
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65 | p = a.p; |
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66 | a.p = 0; |
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67 | } |
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68 | |
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69 | ~auto_ptr () |
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70 | { |
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71 | delete p; |
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72 | } |
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73 | |
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74 | // void because it makes sense in our context |
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75 | void operator = (T *a) |
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76 | { |
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77 | delete p; |
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78 | p = a; |
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79 | } |
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80 | |
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81 | void operator = (auto_ptr &a) |
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82 | { |
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83 | *this = a.p; |
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84 | a.p = 0; |
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85 | } |
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86 | |
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87 | template<typename A> |
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88 | void operator = (auto_ptr<A> &a) |
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89 | { |
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90 | *this = a.p; |
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91 | a.p = 0; |
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92 | } |
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93 | |
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94 | operator T * () const { return p; } |
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95 | |
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96 | T *operator -> () const { return p; } |
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97 | T &operator * () const { return *p; } |
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98 | |
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99 | T *get () |
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100 | { |
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101 | T *r = p; |
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102 | p = 0; |
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103 | return r; |
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104 | } |
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105 | }; |
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106 | |
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107 | typedef auto_ptr<char> auto_str; |
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108 | |
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109 | struct stringvec : simplevec<char *> |
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110 | { |
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111 | ~stringvec () |
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112 | { |
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113 | for (char **c = begin (); c != end (); c++) |
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114 | delete [] *c; |
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115 | } |
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116 | }; |
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117 | #endif |
98 | #endif |
118 | |
99 | |