1 | #ifndef RXVT_UTIL_H |
1 | #ifndef RXVT_UTIL_H |
2 | #define RXVT_UTIL_H |
2 | #define RXVT_UTIL_H |
3 | |
3 | |
4 | #include <cstdlib> |
4 | #include <cstdlib> |
5 | #include <cstring> |
5 | #include <cstring> |
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6 | |
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7 | using namespace std; |
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8 | |
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9 | #define ARRAY_LENGTH(v) (sizeof (v) / sizeof ((v)[0])) |
6 | |
10 | |
7 | #define PP_CONCAT_(a, b) a ## b |
11 | #define PP_CONCAT_(a, b) a ## b |
8 | #define PP_CONCAT(a, b) PP_CONCAT_(a, b) |
12 | #define PP_CONCAT(a, b) PP_CONCAT_(a, b) |
9 | #define PP_STRINGIFY_(a) #a |
13 | #define PP_STRINGIFY_(a) #a |
10 | #define PP_STRINGIFY(a) PP_STRINGIFY_(a) |
14 | #define PP_STRINGIFY(a) PP_STRINGIFY_(a) |
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15 | |
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16 | #define HAVE_GCC_BUILTINS (__GNUC__ >= 4 || (__GNUC__ == 3 && __GNUC_MINOR__ == 4)) |
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17 | |
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18 | #if __GNUC__ >= 4 |
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19 | # define rxvt_attribute(x) __attribute__(x) |
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20 | # define expect(expr,value) __builtin_expect ((expr),(value)) |
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21 | #else |
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22 | # define rxvt_attribute(x) |
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23 | # define expect(expr,value) (expr) |
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24 | #endif |
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25 | |
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26 | // put into ifs if you are very sure that the expression |
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27 | // is mostly true or mostly false. note that these return |
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28 | // booleans, not the expression. |
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29 | #define expect_false(expr) expect ((expr) != 0, 0) |
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30 | #define expect_true(expr) expect ((expr) != 0, 1) |
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31 | |
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32 | #define NORETURN rxvt_attribute ((noreturn)) |
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33 | #define UNUSED rxvt_attribute ((unused)) |
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34 | #define CONST rxvt_attribute ((const)) |
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35 | |
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36 | // increases code size unless -fno-enforce-eh-specs |
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37 | #if __GNUC__ |
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38 | # define NOTHROW |
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39 | # define THROW(x) |
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40 | #else |
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41 | # define NOTHROW throw() |
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42 | # define THROW(x) throw x |
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43 | #endif |
11 | |
44 | |
12 | extern class byteorder { |
45 | extern class byteorder { |
13 | static unsigned int e; // at least 32 bits |
46 | static unsigned int e; // at least 32 bits |
14 | public: |
47 | public: |
15 | byteorder (); |
48 | byteorder (); |
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29 | 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; } |
62 | 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; } |
30 | 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; } |
63 | 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; } |
31 | |
64 | |
32 | template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; } |
65 | template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; } |
33 | |
66 | |
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67 | template<typename T> static inline T squared_diff (T a, T b) { return (a-b)*(a-b); } |
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68 | |
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69 | // linear interpolation |
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70 | template<typename T, typename U, typename P> |
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71 | static inline |
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72 | T lerp (T a, U b, P p) |
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73 | { |
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74 | return (long(a) * long(100 - p) + long(b) * long(p) + 50) / 100; |
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75 | } |
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76 | |
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77 | template <typename I, typename T> |
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78 | I find (I first, I last, const T& value) |
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79 | { |
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80 | while (first != last && *first != value) |
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81 | ++first; |
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82 | |
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83 | return first; |
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84 | } |
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85 | |
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86 | // return a very temporary (and never deallocated) buffer. keep small. |
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87 | void *rxvt_temp_buf (int len); |
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88 | |
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89 | template<typename T> |
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90 | static inline T * |
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91 | rxvt_temp_buf (int len) |
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92 | { |
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93 | return (T *)rxvt_temp_buf (len * sizeof (T)); |
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94 | } |
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95 | |
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96 | // some bit functions, xft fuck me plenty |
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97 | #if HAVE_GCC_BUILTINS |
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98 | /* netbsd stupidly defines popcount itself and puts it into string.h */ |
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99 | static inline int rxvt_ctz (unsigned int x) { return __builtin_ctz (x); } |
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100 | static inline int rxvt_popcount (unsigned int x) { return __builtin_popcount (x); } |
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101 | #else |
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102 | // count trailing zero bits and count # of one bits |
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103 | int rxvt_ctz (unsigned int x) CONST; |
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104 | int rxvt_popcount (unsigned int x) CONST; |
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105 | #endif |
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106 | |
34 | // in range including end |
107 | // in range including end |
35 | #define IN_RANGE_INC(val,beg,end) \ |
108 | #define IN_RANGE_INC(val,beg,end) \ |
36 | ((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg)) |
109 | ((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg)) |
37 | |
110 | |
38 | // in range excluding end |
111 | // in range excluding end |
39 | #define IN_RANGE_EXC(val,beg,end) \ |
112 | #define IN_RANGE_EXC(val,beg,end) \ |
40 | ((unsigned int)(val) - (unsigned int)(beg) < (unsigned int)(end) - (unsigned int)(beg)) |
113 | ((unsigned int)(val) - (unsigned int)(beg) < (unsigned int)(end) - (unsigned int)(beg)) |
41 | |
114 | |
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115 | // for m >= -n, ensure remainder lies between 0..n-1 |
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116 | #define MOD(m,n) (((m) + (n)) % (n)) |
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117 | |
42 | // makes dynamically allocated objects zero-initialised |
118 | // makes dynamically allocated objects zero-initialised |
43 | struct zero_initialized { |
119 | struct zero_initialized |
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120 | { |
44 | void *operator new (size_t s); |
121 | void *operator new (size_t s); |
45 | void operator delete (void *p, size_t s); |
122 | void operator delete (void *p, size_t s); |
46 | }; |
123 | }; |
47 | |
124 | |
48 | /* simplevec taken (and heavily modified), from: |
125 | /* simplevec taken (and heavily modified), from: |
49 | * |
126 | * |
50 | * MICO --- a free CORBA implementation |
127 | * MICO --- a free CORBA implementation |
51 | * Copyright (C) 1997-98 Kay Roemer & Arno Puder |
128 | * Copyright (C) 1997-98 Kay Roemer & Arno Puder |
52 | */ |
129 | */ |
53 | template<class T> |
130 | template<class T> |
54 | struct simplevec { |
131 | struct simplevec |
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132 | { |
55 | typedef T* iterator; |
133 | typedef T* iterator; |
56 | typedef const T* const_iterator; |
134 | typedef const T* const_iterator; |
57 | typedef unsigned long size_type; |
135 | typedef unsigned long size_type; |
58 | |
136 | |
59 | private: |
137 | private: |
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300 | } |
378 | } |
301 | |
379 | |
302 | |
380 | |
303 | template<typename T> |
381 | template<typename T> |
304 | struct vector : simplevec<T> |
382 | struct vector : simplevec<T> |
305 | { }; |
383 | { |
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384 | }; |
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385 | |
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386 | struct stringvec : simplevec<char *> |
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387 | { |
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388 | ~stringvec () |
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389 | { |
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390 | for (char **c = begin (); c != end (); c++) |
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391 | free (*c); |
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392 | } |
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393 | }; |
306 | |
394 | |
307 | #if 0 |
395 | #if 0 |
308 | template<typename T> |
396 | template<typename T> |
309 | struct rxvt_vec : simplevec<void *> { |
397 | struct rxvt_vec : simplevec<void *> |
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398 | { |
310 | typedef T *iterator; |
399 | typedef T *iterator; |
311 | |
400 | |
312 | void push_back (T d) { simplevec<void *>::push_back ((void *)d); } |
401 | void push_back (T d) { simplevec<void *>::push_back ((void *)d); } |
313 | T pop_back () { return (T*)simplevec<void *>::pop_back (); } |
402 | T pop_back () { return (T*)simplevec<void *>::pop_back (); } |
314 | void erase (int i) { erase (begin () + i); } |
403 | void erase (int i) { erase (begin () + i); } |
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318 | T &operator [] (int i) { return * (T *) (& ((* (simplevec<void *> *)this)[i])); } |
407 | T &operator [] (int i) { return * (T *) (& ((* (simplevec<void *> *)this)[i])); } |
319 | const T &operator [] (int i) const { return * (const T *) (& ((* (const simplevec<void *> *)this)[i])); } |
408 | const T &operator [] (int i) const { return * (const T *) (& ((* (const simplevec<void *> *)this)[i])); } |
320 | }; |
409 | }; |
321 | #endif |
410 | #endif |
322 | |
411 | |
323 | template <typename I, typename T> |
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324 | I find (I first, I last, const T& value) |
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325 | { |
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326 | while (first != last && *first != value) |
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327 | ++first; |
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328 | |
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329 | return first; |
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330 | } |
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331 | |
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332 | template<typename T> |
412 | template<typename T> |
333 | struct auto_ptr { |
413 | struct auto_ptr |
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414 | { |
334 | T *p; |
415 | T *p; |
335 | |
416 | |
336 | auto_ptr () : p (0) { } |
417 | auto_ptr () : p (0) { } |
337 | auto_ptr (T *a) : p (a) { } |
418 | auto_ptr (T *a) : p (a) { } |
338 | |
419 | |
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387 | } |
468 | } |
388 | }; |
469 | }; |
389 | |
470 | |
390 | typedef auto_ptr<char> auto_str; |
471 | typedef auto_ptr<char> auto_str; |
391 | |
472 | |
392 | struct stringvec : simplevec<char *> |
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393 | { |
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394 | ~stringvec () |
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395 | { |
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396 | for (char **c = begin (); c != end (); c++) |
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397 | free (*c); |
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398 | } |
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399 | }; |
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400 | |
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401 | #endif |
473 | #endif |
402 | |
474 | |