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 | |
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54 | // various utility functions |
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55 | template<typename T, typename U> static inline T min (T a, U b) { return a < (T)b ? a : (T)b; } |
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56 | template<typename T, typename U> static inline void min_it (T &a, U b) { a = a < (T)b ? a : (T)b; } |
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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 |
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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 | |
17 | template<typename T, typename U> |
75 | template <typename I, typename T> |
18 | static inline T min (T a, U b) { return a < b ? a : (T)b; } |
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 | |
19 | template<typename T, typename U> |
87 | template<typename T> |
20 | static inline T max (T a, U b) { return a > b ? a : (T)b; } |
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 | } |
21 | |
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 | |
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104 | // in range including end |
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105 | #define IN_RANGE_INC(val,beg,end) \ |
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106 | ((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg)) |
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107 | |
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108 | // in range excluding end |
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109 | #define IN_RANGE_EXC(val,beg,end) \ |
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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)) |
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114 | |
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115 | // makes dynamically allocated objects zero-initialised |
22 | struct zero_initialized { |
116 | struct zero_initialized { |
23 | void *operator new (size_t s); |
117 | void *operator new (size_t s); |
24 | void operator delete (void *p, size_t s); |
118 | void operator delete (void *p, size_t s); |
25 | }; |
119 | }; |
26 | |
120 | |
27 | /* simplevec taken (and heavily modified), from: |
121 | /* simplevec taken (and heavily modified), from: |
28 | * |
122 | * |
29 | * MICO --- a free CORBA implementation |
123 | * MICO --- a free CORBA implementation |
30 | * Copyright (C) 1997-98 Kay Roemer & Arno Puder |
124 | * Copyright (C) 1997-98 Kay Roemer & Arno Puder |
31 | */ |
125 | */ |
32 | template<class T> |
126 | template<class T> |
33 | struct simplevec { |
127 | struct simplevec { |
… | |
… | |
40 | T *_buf; |
134 | T *_buf; |
41 | |
135 | |
42 | public: |
136 | public: |
43 | const_iterator begin () const |
137 | const_iterator begin () const |
44 | { |
138 | { |
45 | return &_buf[0]; |
139 | return &_buf[0]; |
46 | } |
140 | } |
47 | iterator begin () |
141 | iterator begin () |
48 | { |
142 | { |
49 | return &_buf[0]; |
143 | return &_buf[0]; |
50 | } |
144 | } |
51 | const_iterator end () const |
145 | const_iterator end () const |
52 | { |
146 | { |
53 | return &_buf[_last]; |
147 | return &_buf[_last]; |
54 | } |
148 | } |
55 | iterator end () |
149 | iterator end () |
56 | { |
150 | { |
57 | return &_buf[_last]; |
151 | return &_buf[_last]; |
58 | } |
152 | } |
59 | size_type capacity () const |
153 | size_type capacity () const |
60 | { |
154 | { |
61 | return _size; |
155 | return _size; |
62 | } |
156 | } |
63 | size_type size () const |
157 | size_type size () const |
64 | { |
158 | { |
65 | return _last; |
159 | return _last; |
66 | } |
160 | } |
67 | |
161 | |
68 | private: |
162 | private: |
69 | static T *alloc (size_type n) |
163 | static T *alloc (size_type n) |
70 | { |
164 | { |
71 | return (T *)::operator new ((size_t) (n * sizeof (T))); |
165 | return (T *)::operator new ((size_t) (n * sizeof (T))); |
72 | } |
166 | } |
73 | static void dealloc (T *buf) |
167 | static void dealloc (T *buf) |
74 | { |
168 | { |
75 | if (buf) |
169 | if (buf) |
76 | ::operator delete (buf); |
170 | ::operator delete (buf); |
77 | } |
171 | } |
78 | |
172 | |
79 | void reserve (iterator where, size_type n) |
173 | void reserve (iterator where, size_type n) |
80 | { |
174 | { |
81 | if (_last + n <= _size) { |
175 | if (_last + n <= _size) { |
82 | memmove (where+n, where, (end ()-where)*sizeof (T)); |
176 | memmove (where+n, where, (end ()-where)*sizeof (T)); |
83 | } else { |
177 | } else { |
84 | size_type sz = _last+n; |
178 | size_type sz = _last+n; |
85 | sz = (_size == 0) ? max (sz, 5) : max (sz, 2*_size); |
179 | sz = (_size == 0) ? max (sz, 5) : max (sz, 2*_size); |
86 | T *nbuf = alloc (sz); |
180 | T *nbuf = alloc (sz); |
87 | if (_buf) { |
181 | if (_buf) { |
88 | memcpy (nbuf, begin (), (where-begin ())*sizeof (T)); |
182 | memcpy (nbuf, begin (), (where-begin ())*sizeof (T)); |
89 | memcpy (nbuf + (where-begin ()) + n, where, |
183 | memcpy (nbuf + (where-begin ()) + n, where, |
90 | (end ()-where)*sizeof (T)); |
184 | (end ()-where)*sizeof (T)); |
91 | dealloc (_buf); |
185 | dealloc (_buf); |
92 | } |
186 | } |
93 | _buf = nbuf; |
187 | _buf = nbuf; |
94 | _size = sz; |
188 | _size = sz; |
95 | } |
189 | } |
96 | } |
190 | } |
97 | |
191 | |
98 | public: |
192 | public: |
99 | void reserve (size_type sz) |
193 | void reserve (size_type sz) |
100 | { |
194 | { |
101 | if (_size < sz) { |
195 | if (_size < sz) { |
102 | sz = (_size == 0) ? max (sz, 5) : max (sz, 2*_size); |
196 | sz = (_size == 0) ? max (sz, 5) : max (sz, 2*_size); |
103 | T *nbuf = alloc (sz); |
197 | T *nbuf = alloc (sz); |
104 | if (_buf) { |
198 | if (_buf) { |
105 | memcpy (nbuf, begin (), size ()*sizeof (T)); |
199 | memcpy (nbuf, begin (), size ()*sizeof (T)); |
106 | dealloc (_buf); |
200 | dealloc (_buf); |
107 | } |
201 | } |
108 | _buf = nbuf; |
202 | _buf = nbuf; |
109 | _size = sz; |
203 | _size = sz; |
110 | } |
204 | } |
111 | } |
205 | } |
112 | simplevec () |
206 | simplevec () |
113 | : _last(0), _size(0), _buf(0) |
207 | : _last(0), _size(0), _buf(0) |
114 | { |
208 | { |
115 | } |
209 | } |
116 | simplevec (size_type n, const T& t = T ()) |
210 | simplevec (size_type n, const T& t = T ()) |
117 | : _last(0), _size(0), _buf(0) |
211 | : _last(0), _size(0), _buf(0) |
118 | { |
212 | { |
119 | insert (begin (), n, t); |
213 | insert (begin (), n, t); |
120 | } |
214 | } |
121 | simplevec (const_iterator first, const_iterator last) |
215 | simplevec (const_iterator first, const_iterator last) |
122 | : _last(0), _size(0), _buf(0) |
216 | : _last(0), _size(0), _buf(0) |
123 | { |
217 | { |
124 | insert (begin (), first, last); |
218 | insert (begin (), first, last); |
125 | } |
219 | } |
126 | simplevec (const simplevec<T> &v) |
220 | simplevec (const simplevec<T> &v) |
127 | : _last(0), _size(0), _buf(0) |
221 | : _last(0), _size(0), _buf(0) |
128 | { |
222 | { |
129 | reserve (v._last); |
223 | reserve (v._last); |
130 | memcpy (_buf, v.begin (), v.size ()*sizeof (T)); |
224 | memcpy (_buf, v.begin (), v.size ()*sizeof (T)); |
131 | _last = v._last; |
225 | _last = v._last; |
132 | } |
226 | } |
133 | simplevec<T> &operator= (const simplevec<T> &v) |
227 | simplevec<T> &operator= (const simplevec<T> &v) |
134 | { |
228 | { |
135 | if (this != &v) { |
229 | if (this != &v) { |
136 | _last = 0; |
230 | _last = 0; |
137 | reserve (v._last); |
231 | reserve (v._last); |
138 | memcpy (_buf, v.begin (), v.size ()*sizeof (T)); |
232 | memcpy (_buf, v.begin (), v.size ()*sizeof (T)); |
139 | _last = v._last; |
233 | _last = v._last; |
140 | } |
234 | } |
141 | return *this; |
235 | return *this; |
142 | } |
236 | } |
143 | ~simplevec () |
237 | ~simplevec () |
144 | { |
238 | { |
145 | dealloc (_buf); |
239 | dealloc (_buf); |
146 | } |
240 | } |
147 | const T &front () const |
241 | const T &front () const |
148 | { |
242 | { |
149 | //ministl_assert (size () > 0); |
243 | //ministl_assert (size () > 0); |
150 | return _buf[0]; |
244 | return _buf[0]; |
151 | } |
245 | } |
152 | T &front () |
246 | T &front () |
153 | { |
247 | { |
154 | //ministl_assert (size () > 0); |
248 | //ministl_assert (size () > 0); |
155 | return _buf[0]; |
249 | return _buf[0]; |
156 | } |
250 | } |
157 | const T &back () const |
251 | const T &back () const |
158 | { |
252 | { |
159 | //ministl_assert (size () > 0); |
253 | //ministl_assert (size () > 0); |
160 | return _buf[_last-1]; |
254 | return _buf[_last-1]; |
161 | } |
255 | } |
162 | T &back () |
256 | T &back () |
163 | { |
257 | { |
164 | //ministl_assert (size () > 0); |
258 | //ministl_assert (size () > 0); |
165 | return _buf[_last-1]; |
259 | return _buf[_last-1]; |
166 | } |
260 | } |
167 | bool empty () const |
261 | bool empty () const |
168 | { |
262 | { |
169 | return _last == 0; |
263 | return _last == 0; |
170 | } |
264 | } |
171 | void clear () |
265 | void clear () |
172 | { |
266 | { |
173 | _last = 0; |
267 | _last = 0; |
174 | } |
268 | } |
175 | void push_back (const T &t) |
269 | void push_back (const T &t) |
176 | { |
270 | { |
177 | reserve (_last+1); |
271 | reserve (_last+1); |
178 | *end () = t; |
272 | *end () = t; |
179 | ++_last; |
273 | ++_last; |
180 | } |
274 | } |
181 | void push_back (T &t) |
275 | void push_back (T &t) |
182 | { |
276 | { |
183 | reserve (_last+1); |
277 | reserve (_last+1); |
184 | *end () = t; |
278 | *end () = t; |
185 | ++_last; |
279 | ++_last; |
186 | } |
280 | } |
187 | void pop_back () |
281 | void pop_back () |
188 | { |
282 | { |
189 | //ministl_assert (size () > 0); |
283 | //ministl_assert (size () > 0); |
190 | --_last; |
284 | --_last; |
191 | } |
285 | } |
192 | const T &operator[] (size_type idx) const |
286 | const T &operator[] (size_type idx) const |
193 | { |
287 | { |
194 | //ministl_assert (idx < size ()); |
288 | //ministl_assert (idx < size ()); |
195 | return _buf[idx]; |
289 | return _buf[idx]; |
196 | } |
290 | } |
197 | T &operator[] (size_type idx) |
291 | T &operator[] (size_type idx) |
198 | { |
292 | { |
199 | //ministl_assert (idx < size ()); |
293 | //ministl_assert (idx < size ()); |
200 | return _buf[idx]; |
294 | return _buf[idx]; |
201 | } |
295 | } |
202 | iterator insert (iterator pos, const T &t) |
296 | iterator insert (iterator pos, const T &t) |
203 | { |
297 | { |
204 | //ministl_assert (pos <= end ()); |
298 | //ministl_assert (pos <= end ()); |
205 | long at = pos - begin (); |
299 | long at = pos - begin (); |
206 | reserve (pos, 1); |
300 | reserve (pos, 1); |
207 | pos = begin ()+at; |
301 | pos = begin ()+at; |
208 | *pos = t; |
302 | *pos = t; |
209 | ++_last; |
303 | ++_last; |
210 | return pos; |
304 | return pos; |
211 | } |
305 | } |
212 | iterator insert (iterator pos, const_iterator first, const_iterator last) |
306 | iterator insert (iterator pos, const_iterator first, const_iterator last) |
213 | { |
307 | { |
214 | //ministl_assert (pos <= end ()); |
308 | //ministl_assert (pos <= end ()); |
215 | long n = last - first; |
309 | long n = last - first; |
216 | long at = pos - begin (); |
310 | long at = pos - begin (); |
217 | if (n > 0) { |
311 | if (n > 0) { |
218 | reserve (pos, n); |
312 | reserve (pos, n); |
219 | pos = begin ()+at; |
313 | pos = begin ()+at; |
220 | memcpy (pos, first, (last-first)*sizeof (T)); |
314 | memcpy (pos, first, (last-first)*sizeof (T)); |
221 | _last += n; |
315 | _last += n; |
222 | } |
316 | } |
223 | return pos; |
317 | return pos; |
224 | } |
318 | } |
225 | iterator insert (iterator pos, size_type n, const T &t) |
319 | iterator insert (iterator pos, size_type n, const T &t) |
226 | { |
320 | { |
227 | //ministl_assert (pos <= end ()); |
321 | //ministl_assert (pos <= end ()); |
228 | long at = pos - begin (); |
322 | long at = pos - begin (); |
229 | if (n > 0) { |
323 | if (n > 0) { |
230 | reserve (pos, n); |
324 | reserve (pos, n); |
231 | pos = begin ()+at; |
325 | pos = begin ()+at; |
232 | for (int i = 0; i < n; ++i) |
326 | for (int i = 0; i < n; ++i) |
233 | pos[i] = t; |
327 | pos[i] = t; |
234 | _last += n; |
328 | _last += n; |
235 | } |
329 | } |
236 | return pos; |
330 | return pos; |
237 | } |
331 | } |
238 | void erase (iterator first, iterator last) |
332 | void erase (iterator first, iterator last) |
239 | { |
333 | { |
240 | if (last != first) { |
334 | if (last != first) { |
241 | memmove (first, last, (end ()-last)*sizeof (T)); |
335 | memmove (first, last, (end () - last) * sizeof (T)); |
242 | _last -= last - first; |
336 | _last -= last - first; |
243 | } |
337 | } |
244 | } |
338 | } |
245 | void erase (iterator pos) |
339 | void erase (iterator pos) |
246 | { |
340 | { |
247 | if (pos != end ()) { |
341 | if (pos != end ()) { |
248 | memmove (pos, pos+1, (end ()- (pos+1))*sizeof (T)); |
342 | memmove (pos, pos+1, (end () - (pos+1)) * sizeof (T)); |
249 | --_last; |
343 | --_last; |
250 | } |
344 | } |
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345 | } |
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346 | void swap (simplevec<T> &t) |
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347 | { |
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348 | ::swap(_last, t._last); |
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349 | ::swap(_size, t._size); |
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350 | ::swap(_buf, t._buf); |
251 | } |
351 | } |
252 | }; |
352 | }; |
253 | |
353 | |
254 | template<class T> |
354 | template<class T> |
255 | bool operator== (const simplevec<T> &v1, const simplevec<T> &v2) |
355 | bool operator== (const simplevec<T> &v1, const simplevec<T> &v2) |
256 | { |
356 | { |
257 | if (v1.size () != v2.size ()) |
357 | if (v1.size () != v2.size ()) |
258 | return false; |
358 | return false; |
259 | return !v1.size () || !memcmp (&v1[0], &v2[0], v1.size ()*sizeof (T)); |
359 | return !v1.size () || !memcmp (&v1[0], &v2[0], v1.size ()*sizeof (T)); |
260 | } |
360 | } |
261 | |
361 | |
262 | template<class T> |
362 | template<class T> |
263 | bool operator< (const simplevec<T> &v1, const simplevec<T> &v2) |
363 | bool operator< (const simplevec<T> &v1, const simplevec<T> &v2) |
264 | { |
364 | { |
265 | unsigned long minlast = min (v1.size (), v2.size ()); |
365 | unsigned long minlast = min (v1.size (), v2.size ()); |
266 | for (unsigned long i = 0; i < minlast; ++i) { |
366 | for (unsigned long i = 0; i < minlast; ++i) { |
267 | if (v1[i] < v2[i]) |
367 | if (v1[i] < v2[i]) |
268 | return true; |
368 | return true; |
269 | if (v2[i] < v1[i]) |
369 | if (v2[i] < v1[i]) |
270 | return false; |
370 | return false; |
271 | } |
371 | } |
272 | return v1.size () < v2.size (); |
372 | return v1.size () < v2.size (); |
273 | } |
373 | } |
274 | |
374 | |
275 | |
375 | |
276 | template<typename T> |
376 | template<typename T> |
277 | struct vector : simplevec<T> |
377 | struct vector : simplevec<T> |
278 | { }; |
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 | }; |
279 | |
389 | |
280 | #if 0 |
390 | #if 0 |
281 | template<typename T> |
391 | template<typename T> |
282 | struct rxvt_vec : simplevec<void *> { |
392 | struct rxvt_vec : simplevec<void *> { |
283 | typedef T *iterator; |
393 | typedef T *iterator; |
… | |
… | |
291 | T &operator [] (int i) { return * (T *) (& ((* (simplevec<void *> *)this)[i])); } |
401 | T &operator [] (int i) { return * (T *) (& ((* (simplevec<void *> *)this)[i])); } |
292 | 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])); } |
293 | }; |
403 | }; |
294 | #endif |
404 | #endif |
295 | |
405 | |
296 | template <typename I, typename T> |
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297 | I find (I first, I last, const T& value) |
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298 | { |
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299 | while (first != last && *first != value) |
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300 | ++first; |
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301 | |
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302 | return first; |
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303 | } |
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304 | |
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305 | template<typename T> |
406 | template<typename T> |
306 | struct auto_ptr { |
407 | struct auto_ptr { |
307 | T *p; |
408 | T *p; |
308 | |
409 | |
309 | auto_ptr () : p (0) { } |
410 | auto_ptr () : p (0) { } |
… | |
… | |
360 | } |
461 | } |
361 | }; |
462 | }; |
362 | |
463 | |
363 | typedef auto_ptr<char> auto_str; |
464 | typedef auto_ptr<char> auto_str; |
364 | |
465 | |
365 | struct stringvec : simplevec<char *> |
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366 | { |
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367 | ~stringvec () |
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368 | { |
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369 | for (char **c = begin (); c != end (); c++) |
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370 | delete [] *c; |
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371 | } |
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372 | }; |
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373 | |
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374 | #endif |
466 | #endif |
375 | |
467 | |