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; |
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8 | |
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9 | #define PP_CONCAT_(a, b) a ## b |
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10 | #define PP_CONCAT(a, b) PP_CONCAT_(a, b) |
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11 | #define PP_STRINGIFY_(a) #a |
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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 |
5 | |
42 | |
6 | extern class byteorder { |
43 | extern class byteorder { |
7 | static unsigned int e; // at least 32 bits |
44 | static unsigned int e; // at least 32 bits |
8 | public: |
45 | public: |
9 | byteorder (); |
46 | byteorder (); |
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12 | static bool network () { return e == 0x11223344; }; |
49 | static bool network () { return e == 0x11223344; }; |
13 | static bool little_endian () { return e == 0x44332211; }; |
50 | static bool little_endian () { return e == 0x44332211; }; |
14 | static bool vax () { return e == 0x44332211; }; |
51 | static bool vax () { return e == 0x44332211; }; |
15 | } byteorder; |
52 | } byteorder; |
16 | |
53 | |
17 | template<typename T, typename U> |
54 | // various utility functions |
18 | static inline T min (T a, U b) { return a < (T)b ? a : (T)b; } |
55 | template<typename T, typename U> static inline T min (T a, U b) { return a < (T)b ? a : (T)b; } |
19 | template<typename T, typename U> |
56 | template<typename T, typename U> static inline void min_it (T &a, U b) { a = a < (T)b ? a : (T)b; } |
20 | static inline T max (T a, U b) { return a > (T)b ? a : (T)b; } |
57 | template<typename T, typename U> static inline T max (T a, U b) { return a > (T)b ? a : (T)b; } |
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58 | 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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59 | |
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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; } |
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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; } |
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62 | |
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63 | template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; } |
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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 |
21 | template<typename T, typename U, typename V> |
68 | template<typename T, typename U, typename P> |
22 | static inline T clamp (T v, U a, V b) { return v < (T)a ? a : v >(T)b ? b : v; } |
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 | |
23 | template<typename T, typename U> |
75 | template <typename I, typename T> |
24 | static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; } |
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 | /* netbsd stupidly defines popcount itself and puts it into string.h */ |
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97 | static inline int rxvt_ctz (unsigned int x) { return __builtin_ctz (x); } |
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98 | static inline int rxvt_popcount (unsigned int x) { return __builtin_popcount (x); } |
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99 | #else |
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100 | // count trailing zero bits and count # of one bits |
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101 | int rxvt_ctz (unsigned int x) CONST; |
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102 | int rxvt_popcount (unsigned int x) CONST; |
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103 | #endif |
25 | |
104 | |
26 | // in range including end |
105 | // in range including end |
27 | #define IN_RANGE_INC(val,beg,end) \ |
106 | #define IN_RANGE_INC(val,beg,end) \ |
28 | ((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg)) |
107 | ((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg)) |
29 | |
108 | |
30 | // in range excluding end |
109 | // in range excluding end |
31 | #define IN_RANGE_EXC(val,beg,end) \ |
110 | #define IN_RANGE_EXC(val,beg,end) \ |
32 | ((unsigned int)(val) - (unsigned int)(beg) < (unsigned int)(end) - (unsigned int)(beg)) |
111 | ((unsigned int)(val) - (unsigned int)(beg) < (unsigned int)(end) - (unsigned int)(beg)) |
33 | |
112 | |
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113 | // for m >= -n, ensure remainder lies between 0..n-1 |
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114 | #define MOD(m,n) (((m) + (n)) % (n)) |
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115 | |
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116 | // makes dynamically allocated objects zero-initialised |
34 | struct zero_initialized { |
117 | struct zero_initialized |
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118 | { |
35 | void *operator new (size_t s); |
119 | void *operator new (size_t s); |
36 | void operator delete (void *p, size_t s); |
120 | void operator delete (void *p, size_t s); |
37 | }; |
121 | }; |
38 | |
122 | |
39 | /* simplevec taken (and heavily modified), from: |
123 | /* simplevec taken (and heavily modified), from: |
40 | * |
124 | * |
41 | * MICO --- a free CORBA implementation |
125 | * MICO --- a free CORBA implementation |
42 | * Copyright (C) 1997-98 Kay Roemer & Arno Puder |
126 | * Copyright (C) 1997-98 Kay Roemer & Arno Puder |
43 | */ |
127 | */ |
44 | template<class T> |
128 | template<class T> |
45 | struct simplevec { |
129 | struct simplevec |
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130 | { |
46 | typedef T* iterator; |
131 | typedef T* iterator; |
47 | typedef const T* const_iterator; |
132 | typedef const T* const_iterator; |
48 | typedef unsigned long size_type; |
133 | typedef unsigned long size_type; |
49 | |
134 | |
50 | private: |
135 | private: |
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… | |
248 | return pos; |
333 | return pos; |
249 | } |
334 | } |
250 | void erase (iterator first, iterator last) |
335 | void erase (iterator first, iterator last) |
251 | { |
336 | { |
252 | if (last != first) { |
337 | if (last != first) { |
253 | memmove (first, last, (end ()-last)*sizeof (T)); |
338 | memmove (first, last, (end () - last) * sizeof (T)); |
254 | _last -= last - first; |
339 | _last -= last - first; |
255 | } |
340 | } |
256 | } |
341 | } |
257 | void erase (iterator pos) |
342 | void erase (iterator pos) |
258 | { |
343 | { |
259 | if (pos != end ()) { |
344 | if (pos != end ()) { |
260 | memmove (pos, pos+1, (end ()- (pos+1))*sizeof (T)); |
345 | memmove (pos, pos+1, (end () - (pos+1)) * sizeof (T)); |
261 | --_last; |
346 | --_last; |
262 | } |
347 | } |
263 | } |
348 | } |
264 | void swap (simplevec<T> &t) |
349 | void swap (simplevec<T> &t) |
265 | { |
350 | { |
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291 | } |
376 | } |
292 | |
377 | |
293 | |
378 | |
294 | template<typename T> |
379 | template<typename T> |
295 | struct vector : simplevec<T> |
380 | struct vector : simplevec<T> |
296 | { }; |
381 | { |
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382 | }; |
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383 | |
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384 | struct stringvec : simplevec<char *> |
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385 | { |
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386 | ~stringvec () |
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387 | { |
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388 | for (char **c = begin (); c != end (); c++) |
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389 | free (*c); |
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390 | } |
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391 | }; |
297 | |
392 | |
298 | #if 0 |
393 | #if 0 |
299 | template<typename T> |
394 | template<typename T> |
300 | struct rxvt_vec : simplevec<void *> { |
395 | struct rxvt_vec : simplevec<void *> |
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396 | { |
301 | typedef T *iterator; |
397 | typedef T *iterator; |
302 | |
398 | |
303 | void push_back (T d) { simplevec<void *>::push_back ((void *)d); } |
399 | void push_back (T d) { simplevec<void *>::push_back ((void *)d); } |
304 | T pop_back () { return (T*)simplevec<void *>::pop_back (); } |
400 | T pop_back () { return (T*)simplevec<void *>::pop_back (); } |
305 | void erase (int i) { erase (begin () + i); } |
401 | void erase (int i) { erase (begin () + i); } |
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309 | T &operator [] (int i) { return * (T *) (& ((* (simplevec<void *> *)this)[i])); } |
405 | T &operator [] (int i) { return * (T *) (& ((* (simplevec<void *> *)this)[i])); } |
310 | const T &operator [] (int i) const { return * (const T *) (& ((* (const simplevec<void *> *)this)[i])); } |
406 | const T &operator [] (int i) const { return * (const T *) (& ((* (const simplevec<void *> *)this)[i])); } |
311 | }; |
407 | }; |
312 | #endif |
408 | #endif |
313 | |
409 | |
314 | template <typename I, typename T> |
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315 | I find (I first, I last, const T& value) |
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316 | { |
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317 | while (first != last && *first != value) |
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318 | ++first; |
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319 | |
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320 | return first; |
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321 | } |
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322 | |
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323 | template<typename T> |
410 | template<typename T> |
324 | struct auto_ptr { |
411 | struct auto_ptr |
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412 | { |
325 | T *p; |
413 | T *p; |
326 | |
414 | |
327 | auto_ptr () : p (0) { } |
415 | auto_ptr () : p (0) { } |
328 | auto_ptr (T *a) : p (a) { } |
416 | auto_ptr (T *a) : p (a) { } |
329 | |
417 | |
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378 | } |
466 | } |
379 | }; |
467 | }; |
380 | |
468 | |
381 | typedef auto_ptr<char> auto_str; |
469 | typedef auto_ptr<char> auto_str; |
382 | |
470 | |
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 | delete [] *c; |
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389 | } |
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390 | }; |
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391 | |
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392 | #endif |
471 | #endif |
393 | |
472 | |