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 <stdlib.h> |
5 | #include <cstring> |
5 | #include <string.h> |
6 | |
6 | #include "ecb.h" |
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 | |
7 | |
34 | // increases code size unless -fno-enforce-eh-specs |
8 | // increases code size unless -fno-enforce-eh-specs |
35 | #if __GNUC__ |
9 | #if __GNUC__ |
36 | # define NOTHROW |
10 | # define NOTHROW |
37 | # define THROW(x) |
11 | # define THROW(x) |
38 | #else |
12 | #else |
39 | # define NOTHROW throw() |
13 | # define NOTHROW throw() |
40 | # define THROW(x) throw x |
14 | # define THROW(x) throw x |
41 | #endif |
15 | #endif |
42 | |
16 | |
43 | extern class byteorder { |
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44 | static unsigned int e; // at least 32 bits |
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45 | public: |
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46 | byteorder (); |
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47 | |
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48 | static bool big_endian () { return e == 0x11223344; }; |
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49 | static bool network () { return e == 0x11223344; }; |
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50 | static bool little_endian () { return e == 0x44332211; }; |
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51 | static bool vax () { return e == 0x44332211; }; |
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52 | } byteorder; |
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53 | |
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54 | // various utility functions |
17 | // various utility functions |
55 | template<typename T, typename U> static inline T min (T a, U b) { return a < (T)b ? a : (T)b; } |
18 | template<typename T, typename U> static inline T min (T a, U b) { return a < (T)b ? a : (T)b; } |
56 | template<typename T, typename U> static inline void min_it (T &a, U b) { a = a < (T)b ? a : (T)b; } |
19 | template<typename T, typename U> static inline void min_it (T &a, U b) { a = 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; } |
20 | template<typename T, typename U> static inline T max (T a, U b) { return a > (T)b ? a : (T)b; } |
58 | template<typename T, typename U> static inline void max_it (T &a, U b) { a = a > (T)b ? a : (T)b; } |
21 | 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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89 | rxvt_temp_buf (int len) |
52 | rxvt_temp_buf (int len) |
90 | { |
53 | { |
91 | return (T *)rxvt_temp_buf (len * sizeof (T)); |
54 | return (T *)rxvt_temp_buf (len * sizeof (T)); |
92 | } |
55 | } |
93 | |
56 | |
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 | |
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104 | // in range including end |
57 | // in range including end |
105 | #define IN_RANGE_INC(val,beg,end) \ |
58 | #define IN_RANGE_INC(val,beg,end) \ |
106 | ((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg)) |
59 | ((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg)) |
107 | |
60 | |
108 | // in range excluding end |
61 | // in range excluding end |
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111 | |
64 | |
112 | // for m >= -n, ensure remainder lies between 0..n-1 |
65 | // for m >= -n, ensure remainder lies between 0..n-1 |
113 | #define MOD(m,n) (((m) + (n)) % (n)) |
66 | #define MOD(m,n) (((m) + (n)) % (n)) |
114 | |
67 | |
115 | // makes dynamically allocated objects zero-initialised |
68 | // makes dynamically allocated objects zero-initialised |
116 | struct zero_initialized { |
69 | struct zero_initialized |
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70 | { |
117 | void *operator new (size_t s); |
71 | void *operator new (size_t s); |
118 | void operator delete (void *p, size_t s); |
72 | void operator delete (void *p, size_t s); |
119 | }; |
73 | }; |
120 | |
74 | |
121 | /* simplevec taken (and heavily modified), from: |
75 | /* simplevec taken (and heavily modified), from: |
122 | * |
76 | * |
123 | * MICO --- a free CORBA implementation |
77 | * MICO --- a free CORBA implementation |
124 | * Copyright (C) 1997-98 Kay Roemer & Arno Puder |
78 | * Copyright (C) 1997-98 Kay Roemer & Arno Puder |
125 | */ |
79 | */ |
126 | template<class T> |
80 | template<class T> |
127 | struct simplevec { |
81 | struct simplevec |
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82 | { |
128 | typedef T* iterator; |
83 | typedef T* iterator; |
129 | typedef const T* const_iterator; |
84 | typedef const T* const_iterator; |
130 | typedef unsigned long size_type; |
85 | typedef unsigned long size_type; |
131 | |
86 | |
132 | private: |
87 | private: |
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387 | } |
342 | } |
388 | }; |
343 | }; |
389 | |
344 | |
390 | #if 0 |
345 | #if 0 |
391 | template<typename T> |
346 | template<typename T> |
392 | struct rxvt_vec : simplevec<void *> { |
347 | struct rxvt_vec : simplevec<void *> |
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348 | { |
393 | typedef T *iterator; |
349 | typedef T *iterator; |
394 | |
350 | |
395 | void push_back (T d) { simplevec<void *>::push_back ((void *)d); } |
351 | void push_back (T d) { simplevec<void *>::push_back ((void *)d); } |
396 | T pop_back () { return (T*)simplevec<void *>::pop_back (); } |
352 | T pop_back () { return (T*)simplevec<void *>::pop_back (); } |
397 | void erase (int i) { erase (begin () + i); } |
353 | void erase (int i) { erase (begin () + i); } |
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402 | const T &operator [] (int i) const { return * (const T *) (& ((* (const simplevec<void *> *)this)[i])); } |
358 | const T &operator [] (int i) const { return * (const T *) (& ((* (const simplevec<void *> *)this)[i])); } |
403 | }; |
359 | }; |
404 | #endif |
360 | #endif |
405 | |
361 | |
406 | template<typename T> |
362 | template<typename T> |
407 | struct auto_ptr { |
363 | struct auto_ptr |
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364 | { |
408 | T *p; |
365 | T *p; |
409 | |
366 | |
410 | auto_ptr () : p (0) { } |
367 | auto_ptr () : p (0) { } |
411 | auto_ptr (T *a) : p (a) { } |
368 | auto_ptr (T *a) : p (a) { } |
412 | |
369 | |