1 | #ifndef RXVT_UTIL_H |
1 | #ifndef RXVT_UTIL_H |
2 | #define RXVT_UTIL_H |
2 | #define RXVT_UTIL_H |
3 | |
3 | |
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4 | #include <cstdlib> |
4 | #include <cstring> |
5 | #include <cstring> |
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6 | |
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7 | using namespace std; |
5 | |
8 | |
6 | #define PP_CONCAT_(a, b) a ## b |
9 | #define PP_CONCAT_(a, b) a ## b |
7 | #define PP_CONCAT(a, b) PP_CONCAT_(a, b) |
10 | #define PP_CONCAT(a, b) PP_CONCAT_(a, b) |
8 | #define PP_STRINGIFY_(a) #a |
11 | #define PP_STRINGIFY_(a) #a |
9 | #define PP_STRINGIFY(a) PP_STRINGIFY_(a) |
12 | #define PP_STRINGIFY(a) PP_STRINGIFY_(a) |
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13 | |
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14 | #define HAVE_GCC_BUILTINS (__GNUC__ >= 4 || (__GNUC__ == 3 && __GNUC_MINOR__ == 4)) |
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15 | |
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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 |
10 | |
42 | |
11 | extern class byteorder { |
43 | extern class byteorder { |
12 | static unsigned int e; // at least 32 bits |
44 | static unsigned int e; // at least 32 bits |
13 | public: |
45 | public: |
14 | byteorder (); |
46 | byteorder (); |
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28 | 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; } |
29 | 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; } |
30 | |
62 | |
31 | 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; } |
32 | |
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 | |
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67 | // linear interpolation |
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68 | template<typename T, typename U, typename P> |
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69 | static inline |
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70 | T lerp (T a, U b, P p) |
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71 | { |
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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)); |
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92 | } |
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93 | |
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94 | // some bit functions, xft fuck me plenty |
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95 | #if HAVE_GCC_BUILTINS |
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96 | static inline int ctz (unsigned int x) { return __builtin_ctz (x); } |
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97 | static inline int popcount (unsigned int x) { return __builtin_popcount (x); } |
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98 | #else |
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99 | // count trailing zero bits and count # of one bits |
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100 | int ctz (unsigned int x) CONST; |
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101 | int popcount (unsigned int x) CONST; |
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102 | #endif |
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103 | |
33 | // in range including end |
104 | // in range including end |
34 | #define IN_RANGE_INC(val,beg,end) \ |
105 | #define IN_RANGE_INC(val,beg,end) \ |
35 | ((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)) |
36 | |
107 | |
37 | // in range excluding end |
108 | // in range excluding end |
38 | #define IN_RANGE_EXC(val,beg,end) \ |
109 | #define IN_RANGE_EXC(val,beg,end) \ |
39 | ((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)) |
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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)) |
40 | |
114 | |
41 | // makes dynamically allocated objects zero-initialised |
115 | // makes dynamically allocated objects zero-initialised |
42 | struct zero_initialized { |
116 | struct zero_initialized { |
43 | void *operator new (size_t s); |
117 | void *operator new (size_t s); |
44 | void operator delete (void *p, size_t s); |
118 | void operator delete (void *p, size_t s); |
45 | }; |
119 | }; |
46 | |
120 | |
47 | /* simplevec taken (and heavily modified), from: |
121 | /* simplevec taken (and heavily modified), from: |
48 | * |
122 | * |
49 | * MICO --- a free CORBA implementation |
123 | * MICO --- a free CORBA implementation |
50 | * Copyright (C) 1997-98 Kay Roemer & Arno Puder |
124 | * Copyright (C) 1997-98 Kay Roemer & Arno Puder |
51 | */ |
125 | */ |
52 | template<class T> |
126 | template<class T> |
53 | struct simplevec { |
127 | struct simplevec { |
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299 | } |
373 | } |
300 | |
374 | |
301 | |
375 | |
302 | template<typename T> |
376 | template<typename T> |
303 | struct vector : simplevec<T> |
377 | struct vector : simplevec<T> |
304 | { }; |
378 | { |
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379 | }; |
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380 | |
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381 | struct stringvec : simplevec<char *> |
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382 | { |
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383 | ~stringvec () |
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384 | { |
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385 | for (char **c = begin (); c != end (); c++) |
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386 | free (*c); |
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387 | } |
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388 | }; |
305 | |
389 | |
306 | #if 0 |
390 | #if 0 |
307 | template<typename T> |
391 | template<typename T> |
308 | struct rxvt_vec : simplevec<void *> { |
392 | struct rxvt_vec : simplevec<void *> { |
309 | typedef T *iterator; |
393 | typedef T *iterator; |
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317 | T &operator [] (int i) { return * (T *) (& ((* (simplevec<void *> *)this)[i])); } |
401 | T &operator [] (int i) { return * (T *) (& ((* (simplevec<void *> *)this)[i])); } |
318 | const T &operator [] (int i) const { return * (const T *) (& ((* (const simplevec<void *> *)this)[i])); } |
402 | const T &operator [] (int i) const { return * (const T *) (& ((* (const simplevec<void *> *)this)[i])); } |
319 | }; |
403 | }; |
320 | #endif |
404 | #endif |
321 | |
405 | |
322 | template <typename I, typename T> |
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323 | I find (I first, I last, const T& value) |
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324 | { |
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325 | while (first != last && *first != value) |
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326 | ++first; |
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327 | |
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328 | return first; |
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329 | } |
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330 | |
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331 | template<typename T> |
406 | template<typename T> |
332 | struct auto_ptr { |
407 | struct auto_ptr { |
333 | T *p; |
408 | T *p; |
334 | |
409 | |
335 | auto_ptr () : p (0) { } |
410 | auto_ptr () : p (0) { } |
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386 | } |
461 | } |
387 | }; |
462 | }; |
388 | |
463 | |
389 | typedef auto_ptr<char> auto_str; |
464 | typedef auto_ptr<char> auto_str; |
390 | |
465 | |
391 | struct stringvec : simplevec<char *> |
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392 | { |
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393 | ~stringvec () |
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394 | { |
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395 | for (char **c = begin (); c != end (); c++) |
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396 | delete [] *c; |
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397 | } |
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398 | }; |
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399 | |
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400 | #endif |
466 | #endif |
401 | |
467 | |