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 | #include <inttypes.h> |
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7 | |
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8 | using namespace std; |
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9 | |
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10 | #define ARRAY_LENGTH(v) (sizeof (v) / sizeof ((v)[0])) |
6 | |
11 | |
7 | #define PP_CONCAT_(a, b) a ## b |
12 | #define PP_CONCAT_(a, b) a ## b |
8 | #define PP_CONCAT(a, b) PP_CONCAT_(a, b) |
13 | #define PP_CONCAT(a, b) PP_CONCAT_(a, b) |
9 | #define PP_STRINGIFY_(a) #a |
14 | #define PP_STRINGIFY_(a) #a |
10 | #define PP_STRINGIFY(a) PP_STRINGIFY_(a) |
15 | #define PP_STRINGIFY(a) PP_STRINGIFY_(a) |
11 | |
16 | |
12 | // actually, some gcc-3.x versions work, too |
17 | #define HAVE_GCC_BUILTINS (__GNUC__ >= 4 || (__GNUC__ == 3 && __GNUC_MINOR__ == 4)) |
13 | #define HAVE_GCC_BUILTINS (__GNUC__ >= 4) |
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14 | |
18 | |
15 | extern class byteorder { |
19 | #if __GNUC__ >= 4 |
16 | static unsigned int e; // at least 32 bits |
20 | # define rxvt_attribute(x) __attribute__(x) |
17 | public: |
21 | # define expect(expr,value) __builtin_expect ((expr),(value)) |
18 | byteorder (); |
22 | #else |
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23 | # define rxvt_attribute(x) |
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24 | # define expect(expr,value) (expr) |
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25 | #endif |
19 | |
26 | |
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27 | // put into ifs if you are very sure that the expression |
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28 | // is mostly true or mostly false. note that these return |
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29 | // booleans, not the expression. |
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30 | #define expect_false(expr) expect ((expr) != 0, 0) |
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31 | #define expect_true(expr) expect ((expr) != 0, 1) |
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32 | |
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33 | #define NORETURN rxvt_attribute ((noreturn)) |
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34 | #define UNUSED rxvt_attribute ((unused)) |
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35 | #define CONST rxvt_attribute ((const)) |
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36 | |
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37 | // increases code size unless -fno-enforce-eh-specs |
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38 | #if __GNUC__ |
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39 | # define NOTHROW |
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40 | # define THROW(x) |
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41 | #else |
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42 | # define NOTHROW throw() |
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43 | # define THROW(x) throw x |
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44 | #endif |
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45 | |
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46 | namespace byteorder { |
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47 | static uint32_t e () |
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48 | { |
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49 | char c [4] = { 0x11, 0x22, 0x33, 0x44 }; |
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50 | return *(uint32_t *)c; |
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51 | } |
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52 | |
20 | static bool big_endian () { return e == 0x11223344; }; |
53 | static bool big_endian () { return e () == 0x11223344; }; |
21 | static bool network () { return e == 0x11223344; }; |
54 | static bool network () { return big_endian (); }; |
22 | static bool little_endian () { return e == 0x44332211; }; |
55 | static bool little_endian () { return e () == 0x44332211; }; |
23 | static bool vax () { return e == 0x44332211; }; |
56 | static bool vax () { return little_endian (); }; |
24 | } byteorder; |
57 | }; |
25 | |
58 | |
26 | // various utility functions |
59 | // various utility functions |
27 | template<typename T, typename U> static inline T min (T a, U b) { return a < (T)b ? a : (T)b; } |
60 | template<typename T, typename U> static inline T min (T a, U b) { return a < (T)b ? a : (T)b; } |
28 | template<typename T, typename U> static inline void min_it (T &a, U b) { a = a < (T)b ? a : (T)b; } |
61 | template<typename T, typename U> static inline void min_it (T &a, U b) { a = a < (T)b ? a : (T)b; } |
29 | template<typename T, typename U> static inline T max (T a, U b) { return a > (T)b ? a : (T)b; } |
62 | template<typename T, typename U> static inline T max (T a, U b) { return a > (T)b ? a : (T)b; } |
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32 | 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; } |
65 | 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; } |
33 | 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; } |
66 | 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; } |
34 | |
67 | |
35 | template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; } |
68 | template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; } |
36 | |
69 | |
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70 | template<typename T> static inline T squared_diff (T a, T b) { return (a-b)*(a-b); } |
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71 | |
37 | // linear interpolation |
72 | // linear interpolation |
38 | template<typename T, typename U, typename P> |
73 | template<typename T, typename U, typename P> |
39 | static inline |
74 | static inline |
40 | T lerp (T a, U b, P p) |
75 | T lerp (T a, U b, P p) |
41 | { |
76 | { |
42 | return (int(a) * int(p) + int(b) * int(100 - p)) / 100; |
77 | return (long(a) * long(100 - p) + long(b) * long(p) + 50) / 100; |
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78 | } |
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79 | |
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80 | template <typename I, typename T> |
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81 | I find (I first, I last, const T& value) |
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82 | { |
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83 | while (first != last && *first != value) |
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84 | ++first; |
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85 | |
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86 | return first; |
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87 | } |
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88 | |
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89 | // return a very temporary (and never deallocated) buffer. keep small. |
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90 | void *rxvt_temp_buf (int len); |
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91 | |
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92 | template<typename T> |
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93 | static inline T * |
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94 | rxvt_temp_buf (int len) |
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95 | { |
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96 | return (T *)rxvt_temp_buf (len * sizeof (T)); |
43 | } |
97 | } |
44 | |
98 | |
45 | // some bit functions, xft fuck me plenty |
99 | // some bit functions, xft fuck me plenty |
46 | #if HAVE_GCC_BUILTINS |
100 | #if HAVE_GCC_BUILTINS |
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101 | /* netbsd stupidly defines popcount itself and puts it into string.h */ |
47 | static inline int ctz (unsigned int x) { return __builtin_ctz (x); } |
102 | static inline int rxvt_ctz (unsigned int x) { return __builtin_ctz (x); } |
48 | static inline int popcount (unsigned int x) { return __builtin_popcount (x); } |
103 | static inline int rxvt_popcount (unsigned int x) { return __builtin_popcount (x); } |
49 | #else |
104 | #else |
50 | // count trailing zero bits and count # of one bits |
105 | // count trailing zero bits and count # of one bits |
51 | int ctz (unsigned int x); |
106 | int rxvt_ctz (unsigned int x) CONST; |
52 | int popcount (unsigned int x); |
107 | int rxvt_popcount (unsigned int x) CONST; |
53 | #endif |
108 | #endif |
54 | |
109 | |
55 | // in range including end |
110 | // in range including end |
56 | #define IN_RANGE_INC(val,beg,end) \ |
111 | #define IN_RANGE_INC(val,beg,end) \ |
57 | ((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg)) |
112 | ((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg)) |
58 | |
113 | |
59 | // in range excluding end |
114 | // in range excluding end |
60 | #define IN_RANGE_EXC(val,beg,end) \ |
115 | #define IN_RANGE_EXC(val,beg,end) \ |
61 | ((unsigned int)(val) - (unsigned int)(beg) < (unsigned int)(end) - (unsigned int)(beg)) |
116 | ((unsigned int)(val) - (unsigned int)(beg) < (unsigned int)(end) - (unsigned int)(beg)) |
62 | |
117 | |
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118 | // for m >= -n, ensure remainder lies between 0..n-1 |
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119 | #define MOD(m,n) (((m) + (n)) % (n)) |
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120 | |
63 | // makes dynamically allocated objects zero-initialised |
121 | // makes dynamically allocated objects zero-initialised |
64 | struct zero_initialized { |
122 | struct zero_initialized |
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123 | { |
65 | void *operator new (size_t s); |
124 | void *operator new (size_t s); |
66 | void operator delete (void *p, size_t s); |
125 | void operator delete (void *p, size_t s); |
67 | }; |
126 | }; |
68 | |
127 | |
69 | /* simplevec taken (and heavily modified), from: |
128 | /* simplevec taken (and heavily modified), from: |
70 | * |
129 | * |
71 | * MICO --- a free CORBA implementation |
130 | * MICO --- a free CORBA implementation |
72 | * Copyright (C) 1997-98 Kay Roemer & Arno Puder |
131 | * Copyright (C) 1997-98 Kay Roemer & Arno Puder |
73 | */ |
132 | */ |
74 | template<class T> |
133 | template<class T> |
75 | struct simplevec { |
134 | struct simplevec |
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135 | { |
76 | typedef T* iterator; |
136 | typedef T* iterator; |
77 | typedef const T* const_iterator; |
137 | typedef const T* const_iterator; |
78 | typedef unsigned long size_type; |
138 | typedef unsigned long size_type; |
79 | |
139 | |
80 | private: |
140 | private: |
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… | |
321 | } |
381 | } |
322 | |
382 | |
323 | |
383 | |
324 | template<typename T> |
384 | template<typename T> |
325 | struct vector : simplevec<T> |
385 | struct vector : simplevec<T> |
326 | { }; |
386 | { |
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387 | }; |
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388 | |
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389 | struct stringvec : simplevec<char *> |
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390 | { |
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391 | ~stringvec () |
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392 | { |
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393 | for (char **c = begin (); c != end (); c++) |
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394 | free (*c); |
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395 | } |
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396 | }; |
327 | |
397 | |
328 | #if 0 |
398 | #if 0 |
329 | template<typename T> |
399 | template<typename T> |
330 | struct rxvt_vec : simplevec<void *> { |
400 | struct rxvt_vec : simplevec<void *> |
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401 | { |
331 | typedef T *iterator; |
402 | typedef T *iterator; |
332 | |
403 | |
333 | void push_back (T d) { simplevec<void *>::push_back ((void *)d); } |
404 | void push_back (T d) { simplevec<void *>::push_back ((void *)d); } |
334 | T pop_back () { return (T*)simplevec<void *>::pop_back (); } |
405 | T pop_back () { return (T*)simplevec<void *>::pop_back (); } |
335 | void erase (int i) { erase (begin () + i); } |
406 | void erase (int i) { erase (begin () + i); } |
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339 | T &operator [] (int i) { return * (T *) (& ((* (simplevec<void *> *)this)[i])); } |
410 | T &operator [] (int i) { return * (T *) (& ((* (simplevec<void *> *)this)[i])); } |
340 | const T &operator [] (int i) const { return * (const T *) (& ((* (const simplevec<void *> *)this)[i])); } |
411 | const T &operator [] (int i) const { return * (const T *) (& ((* (const simplevec<void *> *)this)[i])); } |
341 | }; |
412 | }; |
342 | #endif |
413 | #endif |
343 | |
414 | |
344 | template <typename I, typename T> |
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345 | I find (I first, I last, const T& value) |
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346 | { |
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347 | while (first != last && *first != value) |
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348 | ++first; |
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349 | |
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350 | return first; |
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351 | } |
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352 | |
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353 | template<typename T> |
415 | template<typename T> |
354 | struct auto_ptr { |
416 | struct auto_ptr |
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417 | { |
355 | T *p; |
418 | T *p; |
356 | |
419 | |
357 | auto_ptr () : p (0) { } |
420 | auto_ptr () : p (0) { } |
358 | auto_ptr (T *a) : p (a) { } |
421 | auto_ptr (T *a) : p (a) { } |
359 | |
422 | |
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408 | } |
471 | } |
409 | }; |
472 | }; |
410 | |
473 | |
411 | typedef auto_ptr<char> auto_str; |
474 | typedef auto_ptr<char> auto_str; |
412 | |
475 | |
413 | struct stringvec : simplevec<char *> |
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414 | { |
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415 | ~stringvec () |
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416 | { |
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417 | for (char **c = begin (); c != end (); c++) |
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418 | free (*c); |
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419 | } |
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420 | }; |
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421 | |
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422 | // return a very temporary (and never deallocated) buffer. keep small. |
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423 | void *rxvt_temp_buf (int len); |
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424 | |
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425 | template<typename T> |
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426 | inline T * |
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427 | rxvt_temp_buf (int len) |
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428 | { |
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429 | return (T *)rxvt_temp_buf (len * sizeof (T)); |
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430 | } |
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431 | |
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432 | #endif |
476 | #endif |
433 | |
477 | |