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; |
6 | |
8 | |
7 | #define PP_CONCAT_(a, b) a ## b |
9 | #define PP_CONCAT_(a, b) a ## b |
8 | #define PP_CONCAT(a, b) PP_CONCAT_(a, b) |
10 | #define PP_CONCAT(a, b) PP_CONCAT_(a, b) |
9 | #define PP_STRINGIFY_(a) #a |
11 | #define PP_STRINGIFY_(a) #a |
10 | #define PP_STRINGIFY(a) PP_STRINGIFY_(a) |
12 | #define PP_STRINGIFY(a) PP_STRINGIFY_(a) |
11 | |
13 | |
12 | // actually, some gcc-3.x versions work, too |
14 | #define HAVE_GCC_BUILTINS (__GNUC__ >= 4 || (__GNUC__ == 3 && __GNUC_MINOR__ == 4)) |
13 | #define HAVE_GCC_BUILTINS (__GNUC__ >= 4) |
15 | |
14 | #define HAVE_GCC_BUILTINS 0 |
16 | #if __GNUC__ >= 4 |
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17 | # define rxvt_attribute(x) __attribute__(x) |
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18 | # define expect(expr,value) __builtin_expect ((expr),(value)) |
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19 | #else |
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20 | # define rxvt_attribute(x) |
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21 | # define expect(expr,value) (expr) |
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22 | #endif |
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23 | |
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24 | // put into ifs if you are very sure that the expression |
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25 | // is mostly true or mosty false. note that these return |
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26 | // booleans, not the expression. |
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27 | #define expect_false(expr) expect ((expr) != 0, 0) |
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28 | #define expect_true(expr) expect ((expr) != 0, 1) |
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29 | |
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30 | #define NORETURN rxvt_attribute ((noreturn)) |
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31 | #define UNUSED rxvt_attribute ((unused)) |
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32 | #define CONST rxvt_attribute ((const)) |
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33 | |
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34 | // increases code size unless -fno-enforce-eh-specs |
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35 | #if __GNUC__ |
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36 | # define NOTHROW |
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37 | # define THROW(x) |
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38 | #else |
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39 | # define NOTHROW throw() |
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40 | # define THROW(x) throw x |
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41 | #endif |
15 | |
42 | |
16 | extern class byteorder { |
43 | extern class byteorder { |
17 | static unsigned int e; // at least 32 bits |
44 | static unsigned int e; // at least 32 bits |
18 | public: |
45 | public: |
19 | byteorder (); |
46 | byteorder (); |
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33 | 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; } |
60 | 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; } |
34 | 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; } |
61 | 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; } |
35 | |
62 | |
36 | template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; } |
63 | template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; } |
37 | |
64 | |
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65 | template<typename T> static inline T squared_diff (T a, T b) { return (a-b)*(a-b); } |
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66 | |
38 | // linear interpolation |
67 | // linear interpolation |
39 | template<typename T, typename U, typename P> |
68 | template<typename T, typename U, typename P> |
40 | static inline |
69 | static inline |
41 | T lerp (T a, U b, P p) |
70 | T lerp (T a, U b, P p) |
42 | { |
71 | { |
43 | return (int(a) * int(p) + int(b) * int(100 - p)) / 100; |
72 | return (long(a) * long(100 - p) + long(b) * long(p) + 50) / 100; |
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73 | } |
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74 | |
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75 | template <typename I, typename T> |
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76 | I find (I first, I last, const T& value) |
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77 | { |
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78 | while (first != last && *first != value) |
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79 | ++first; |
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80 | |
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81 | return first; |
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82 | } |
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83 | |
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84 | // return a very temporary (and never deallocated) buffer. keep small. |
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85 | void *rxvt_temp_buf (int len); |
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86 | |
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87 | template<typename T> |
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88 | static inline T * |
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89 | rxvt_temp_buf (int len) |
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90 | { |
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91 | return (T *)rxvt_temp_buf (len * sizeof (T)); |
44 | } |
92 | } |
45 | |
93 | |
46 | // some bit functions, xft fuck me plenty |
94 | // some bit functions, xft fuck me plenty |
47 | #if HAVE_GCC_BUILTINS |
95 | #if HAVE_GCC_BUILTINS |
48 | static inline int ctz (unsigned int x) { return __builtin_ctz (x); } |
96 | static inline int ctz (unsigned int x) { return __builtin_ctz (x); } |
49 | static inline int popcount (unsigned int x) { return __builtin_popcount (x); } |
97 | static inline int popcount (unsigned int x) { return __builtin_popcount (x); } |
50 | #else |
98 | #else |
51 | // count trailing zero bits and count # of one bits |
99 | // count trailing zero bits and count # of one bits |
52 | int ctz (unsigned int x); |
100 | int ctz (unsigned int x) CONST; |
53 | int popcount (unsigned int x); |
101 | int popcount (unsigned int x) CONST; |
54 | #endif |
102 | #endif |
55 | |
103 | |
56 | // in range including end |
104 | // in range including end |
57 | #define IN_RANGE_INC(val,beg,end) \ |
105 | #define IN_RANGE_INC(val,beg,end) \ |
58 | ((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg)) |
106 | ((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg)) |
59 | |
107 | |
60 | // in range excluding end |
108 | // in range excluding end |
61 | #define IN_RANGE_EXC(val,beg,end) \ |
109 | #define IN_RANGE_EXC(val,beg,end) \ |
62 | ((unsigned int)(val) - (unsigned int)(beg) < (unsigned int)(end) - (unsigned int)(beg)) |
110 | ((unsigned int)(val) - (unsigned int)(beg) < (unsigned int)(end) - (unsigned int)(beg)) |
63 | |
111 | |
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112 | // for m >= -n, ensure remainder lies between 0..n-1 |
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113 | #define MOD(m,n) (((m) + (n)) % (n)) |
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114 | |
64 | // makes dynamically allocated objects zero-initialised |
115 | // makes dynamically allocated objects zero-initialised |
65 | struct zero_initialized { |
116 | struct zero_initialized |
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117 | { |
66 | void *operator new (size_t s); |
118 | void *operator new (size_t s); |
67 | void operator delete (void *p, size_t s); |
119 | void operator delete (void *p, size_t s); |
68 | }; |
120 | }; |
69 | |
121 | |
70 | /* simplevec taken (and heavily modified), from: |
122 | /* simplevec taken (and heavily modified), from: |
71 | * |
123 | * |
72 | * MICO --- a free CORBA implementation |
124 | * MICO --- a free CORBA implementation |
73 | * Copyright (C) 1997-98 Kay Roemer & Arno Puder |
125 | * Copyright (C) 1997-98 Kay Roemer & Arno Puder |
74 | */ |
126 | */ |
75 | template<class T> |
127 | template<class T> |
76 | struct simplevec { |
128 | struct simplevec |
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129 | { |
77 | typedef T* iterator; |
130 | typedef T* iterator; |
78 | typedef const T* const_iterator; |
131 | typedef const T* const_iterator; |
79 | typedef unsigned long size_type; |
132 | typedef unsigned long size_type; |
80 | |
133 | |
81 | private: |
134 | private: |
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… | |
322 | } |
375 | } |
323 | |
376 | |
324 | |
377 | |
325 | template<typename T> |
378 | template<typename T> |
326 | struct vector : simplevec<T> |
379 | struct vector : simplevec<T> |
327 | { }; |
380 | { |
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381 | }; |
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382 | |
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383 | struct stringvec : simplevec<char *> |
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384 | { |
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385 | ~stringvec () |
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386 | { |
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387 | for (char **c = begin (); c != end (); c++) |
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388 | free (*c); |
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389 | } |
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390 | }; |
328 | |
391 | |
329 | #if 0 |
392 | #if 0 |
330 | template<typename T> |
393 | template<typename T> |
331 | struct rxvt_vec : simplevec<void *> { |
394 | struct rxvt_vec : simplevec<void *> |
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395 | { |
332 | typedef T *iterator; |
396 | typedef T *iterator; |
333 | |
397 | |
334 | void push_back (T d) { simplevec<void *>::push_back ((void *)d); } |
398 | void push_back (T d) { simplevec<void *>::push_back ((void *)d); } |
335 | T pop_back () { return (T*)simplevec<void *>::pop_back (); } |
399 | T pop_back () { return (T*)simplevec<void *>::pop_back (); } |
336 | void erase (int i) { erase (begin () + i); } |
400 | void erase (int i) { erase (begin () + i); } |
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340 | T &operator [] (int i) { return * (T *) (& ((* (simplevec<void *> *)this)[i])); } |
404 | T &operator [] (int i) { return * (T *) (& ((* (simplevec<void *> *)this)[i])); } |
341 | const T &operator [] (int i) const { return * (const T *) (& ((* (const simplevec<void *> *)this)[i])); } |
405 | const T &operator [] (int i) const { return * (const T *) (& ((* (const simplevec<void *> *)this)[i])); } |
342 | }; |
406 | }; |
343 | #endif |
407 | #endif |
344 | |
408 | |
345 | template <typename I, typename T> |
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346 | I find (I first, I last, const T& value) |
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347 | { |
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348 | while (first != last && *first != value) |
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349 | ++first; |
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350 | |
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351 | return first; |
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352 | } |
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353 | |
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354 | template<typename T> |
409 | template<typename T> |
355 | struct auto_ptr { |
410 | struct auto_ptr |
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411 | { |
356 | T *p; |
412 | T *p; |
357 | |
413 | |
358 | auto_ptr () : p (0) { } |
414 | auto_ptr () : p (0) { } |
359 | auto_ptr (T *a) : p (a) { } |
415 | auto_ptr (T *a) : p (a) { } |
360 | |
416 | |
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409 | } |
465 | } |
410 | }; |
466 | }; |
411 | |
467 | |
412 | typedef auto_ptr<char> auto_str; |
468 | typedef auto_ptr<char> auto_str; |
413 | |
469 | |
414 | struct stringvec : simplevec<char *> |
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415 | { |
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416 | ~stringvec () |
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417 | { |
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418 | for (char **c = begin (); c != end (); c++) |
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419 | free (*c); |
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420 | } |
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421 | }; |
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422 | |
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423 | // return a very temporary (and never deallocated) buffer. keep small. |
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424 | void *rxvt_temp_buf (int len); |
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425 | |
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426 | template<typename T> |
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427 | inline T * |
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428 | rxvt_temp_buf (int len) |
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429 | { |
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430 | return (T *)rxvt_temp_buf (len * sizeof (T)); |
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431 | } |
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432 | |
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433 | #endif |
470 | #endif |
434 | |
471 | |