1 | #ifndef RXVT_UTIL_H |
1 | #ifndef RXVT_UTIL_H |
2 | #define RXVT_UTIL_H |
2 | #define RXVT_UTIL_H |
3 | |
3 | |
4 | #include <cstring> |
4 | #include <cstring> |
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5 | |
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6 | #define PP_CONCAT_(a, b) a ## b |
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7 | #define PP_CONCAT(a, b) PP_CONCAT_(a, b) |
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8 | #define PP_STRINGIFY_(a) #a |
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9 | #define PP_STRINGIFY(a) PP_STRINGIFY_(a) |
5 | |
10 | |
6 | extern class byteorder { |
11 | extern class byteorder { |
7 | static unsigned int e; // at least 32 bits |
12 | static unsigned int e; // at least 32 bits |
8 | public: |
13 | public: |
9 | byteorder (); |
14 | byteorder (); |
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12 | static bool network () { return e == 0x11223344; }; |
17 | static bool network () { return e == 0x11223344; }; |
13 | static bool little_endian () { return e == 0x44332211; }; |
18 | static bool little_endian () { return e == 0x44332211; }; |
14 | static bool vax () { return e == 0x44332211; }; |
19 | static bool vax () { return e == 0x44332211; }; |
15 | } byteorder; |
20 | } byteorder; |
16 | |
21 | |
17 | template<typename T, typename U> |
22 | // various utility functions |
18 | static inline T min (T a, U b) { return a < b ? a : (T)b; } |
23 | 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> |
24 | 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 > b ? a : (T)b; } |
25 | template<typename T, typename U> static inline T max (T a, U b) { return a > (T)b ? a : (T)b; } |
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26 | template<typename T, typename U> static inline void max_it (T &a, U b) { a = a > (T)b ? a : (T)b; } |
21 | |
27 | |
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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; } |
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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; } |
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30 | |
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31 | 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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32 | |
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33 | // in range including end |
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34 | #define IN_RANGE_INC(val,beg,end) \ |
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35 | ((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg)) |
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36 | |
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37 | // in range excluding end |
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38 | #define IN_RANGE_EXC(val,beg,end) \ |
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39 | ((unsigned int)(val) - (unsigned int)(beg) < (unsigned int)(end) - (unsigned int)(beg)) |
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40 | |
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41 | // makes dynamically allocated objects zero-initialised |
22 | struct zero_initialized { |
42 | struct zero_initialized { |
23 | void *operator new (size_t s); |
43 | void *operator new (size_t s); |
24 | void operator delete (void *p, size_t s); |
44 | void operator delete (void *p, size_t s); |
25 | }; |
45 | }; |
26 | |
46 | |
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40 | T *_buf; |
60 | T *_buf; |
41 | |
61 | |
42 | public: |
62 | public: |
43 | const_iterator begin () const |
63 | const_iterator begin () const |
44 | { |
64 | { |
45 | return &_buf[0]; |
65 | return &_buf[0]; |
46 | } |
66 | } |
47 | iterator begin () |
67 | iterator begin () |
48 | { |
68 | { |
49 | return &_buf[0]; |
69 | return &_buf[0]; |
50 | } |
70 | } |
51 | const_iterator end () const |
71 | const_iterator end () const |
52 | { |
72 | { |
53 | return &_buf[_last]; |
73 | return &_buf[_last]; |
54 | } |
74 | } |
55 | iterator end () |
75 | iterator end () |
56 | { |
76 | { |
57 | return &_buf[_last]; |
77 | return &_buf[_last]; |
58 | } |
78 | } |
59 | size_type capacity () const |
79 | size_type capacity () const |
60 | { |
80 | { |
61 | return _size; |
81 | return _size; |
62 | } |
82 | } |
63 | size_type size () const |
83 | size_type size () const |
64 | { |
84 | { |
65 | return _last; |
85 | return _last; |
66 | } |
86 | } |
67 | |
87 | |
68 | private: |
88 | private: |
69 | static T *alloc (size_type n) |
89 | static T *alloc (size_type n) |
70 | { |
90 | { |
71 | return (T *)::operator new ((size_t) (n * sizeof (T))); |
91 | return (T *)::operator new ((size_t) (n * sizeof (T))); |
72 | } |
92 | } |
73 | static void dealloc (T *buf) |
93 | static void dealloc (T *buf) |
74 | { |
94 | { |
75 | if (buf) |
95 | if (buf) |
76 | ::operator delete (buf); |
96 | ::operator delete (buf); |
77 | } |
97 | } |
78 | |
98 | |
79 | void reserve (iterator where, size_type n) |
99 | void reserve (iterator where, size_type n) |
80 | { |
100 | { |
81 | if (_last + n <= _size) { |
101 | if (_last + n <= _size) { |
82 | memmove (where+n, where, (end ()-where)*sizeof (T)); |
102 | memmove (where+n, where, (end ()-where)*sizeof (T)); |
83 | } else { |
103 | } else { |
84 | size_type sz = _last+n; |
104 | size_type sz = _last+n; |
85 | sz = (_size == 0) ? max (sz, 5) : max (sz, 2*_size); |
105 | sz = (_size == 0) ? max (sz, 5) : max (sz, 2*_size); |
86 | T *nbuf = alloc (sz); |
106 | T *nbuf = alloc (sz); |
87 | if (_buf) { |
107 | if (_buf) { |
88 | memcpy (nbuf, begin (), (where-begin ())*sizeof (T)); |
108 | memcpy (nbuf, begin (), (where-begin ())*sizeof (T)); |
89 | memcpy (nbuf + (where-begin ()) + n, where, |
109 | memcpy (nbuf + (where-begin ()) + n, where, |
90 | (end ()-where)*sizeof (T)); |
110 | (end ()-where)*sizeof (T)); |
91 | dealloc (_buf); |
111 | dealloc (_buf); |
92 | } |
112 | } |
93 | _buf = nbuf; |
113 | _buf = nbuf; |
94 | _size = sz; |
114 | _size = sz; |
95 | } |
115 | } |
96 | } |
116 | } |
97 | |
117 | |
98 | public: |
118 | public: |
99 | void reserve (size_type sz) |
119 | void reserve (size_type sz) |
100 | { |
120 | { |
101 | if (_size < sz) { |
121 | if (_size < sz) { |
102 | sz = (_size == 0) ? max (sz, 5) : max (sz, 2*_size); |
122 | sz = (_size == 0) ? max (sz, 5) : max (sz, 2*_size); |
103 | T *nbuf = alloc (sz); |
123 | T *nbuf = alloc (sz); |
104 | if (_buf) { |
124 | if (_buf) { |
105 | memcpy (nbuf, begin (), size ()*sizeof (T)); |
125 | memcpy (nbuf, begin (), size ()*sizeof (T)); |
106 | dealloc (_buf); |
126 | dealloc (_buf); |
107 | } |
127 | } |
108 | _buf = nbuf; |
128 | _buf = nbuf; |
109 | _size = sz; |
129 | _size = sz; |
110 | } |
130 | } |
111 | } |
131 | } |
112 | simplevec () |
132 | simplevec () |
113 | : _last(0), _size(0), _buf(0) |
133 | : _last(0), _size(0), _buf(0) |
114 | { |
134 | { |
115 | } |
135 | } |
116 | simplevec (size_type n, const T& t = T ()) |
136 | simplevec (size_type n, const T& t = T ()) |
117 | : _last(0), _size(0), _buf(0) |
137 | : _last(0), _size(0), _buf(0) |
118 | { |
138 | { |
119 | insert (begin (), n, t); |
139 | insert (begin (), n, t); |
120 | } |
140 | } |
121 | simplevec (const_iterator first, const_iterator last) |
141 | simplevec (const_iterator first, const_iterator last) |
122 | : _last(0), _size(0), _buf(0) |
142 | : _last(0), _size(0), _buf(0) |
123 | { |
143 | { |
124 | insert (begin (), first, last); |
144 | insert (begin (), first, last); |
125 | } |
145 | } |
126 | simplevec (const simplevec<T> &v) |
146 | simplevec (const simplevec<T> &v) |
127 | : _last(0), _size(0), _buf(0) |
147 | : _last(0), _size(0), _buf(0) |
128 | { |
148 | { |
129 | reserve (v._last); |
149 | reserve (v._last); |
130 | memcpy (_buf, v.begin (), v.size ()*sizeof (T)); |
150 | memcpy (_buf, v.begin (), v.size ()*sizeof (T)); |
131 | _last = v._last; |
151 | _last = v._last; |
132 | } |
152 | } |
133 | simplevec<T> &operator= (const simplevec<T> &v) |
153 | simplevec<T> &operator= (const simplevec<T> &v) |
134 | { |
154 | { |
135 | if (this != &v) { |
155 | if (this != &v) { |
136 | _last = 0; |
156 | _last = 0; |
137 | reserve (v._last); |
157 | reserve (v._last); |
138 | memcpy (_buf, v.begin (), v.size ()*sizeof (T)); |
158 | memcpy (_buf, v.begin (), v.size ()*sizeof (T)); |
139 | _last = v._last; |
159 | _last = v._last; |
140 | } |
160 | } |
141 | return *this; |
161 | return *this; |
142 | } |
162 | } |
143 | ~simplevec () |
163 | ~simplevec () |
144 | { |
164 | { |
145 | dealloc (_buf); |
165 | dealloc (_buf); |
146 | } |
166 | } |
147 | const T &front () const |
167 | const T &front () const |
148 | { |
168 | { |
149 | //ministl_assert (size () > 0); |
169 | //ministl_assert (size () > 0); |
150 | return _buf[0]; |
170 | return _buf[0]; |
151 | } |
171 | } |
152 | T &front () |
172 | T &front () |
153 | { |
173 | { |
154 | //ministl_assert (size () > 0); |
174 | //ministl_assert (size () > 0); |
155 | return _buf[0]; |
175 | return _buf[0]; |
156 | } |
176 | } |
157 | const T &back () const |
177 | const T &back () const |
158 | { |
178 | { |
159 | //ministl_assert (size () > 0); |
179 | //ministl_assert (size () > 0); |
160 | return _buf[_last-1]; |
180 | return _buf[_last-1]; |
161 | } |
181 | } |
162 | T &back () |
182 | T &back () |
163 | { |
183 | { |
164 | //ministl_assert (size () > 0); |
184 | //ministl_assert (size () > 0); |
165 | return _buf[_last-1]; |
185 | return _buf[_last-1]; |
166 | } |
186 | } |
167 | bool empty () const |
187 | bool empty () const |
168 | { |
188 | { |
169 | return _last == 0; |
189 | return _last == 0; |
170 | } |
190 | } |
171 | void clear () |
191 | void clear () |
172 | { |
192 | { |
173 | _last = 0; |
193 | _last = 0; |
174 | } |
194 | } |
175 | void push_back (const T &t) |
195 | void push_back (const T &t) |
176 | { |
196 | { |
177 | reserve (_last+1); |
197 | reserve (_last+1); |
178 | *end () = t; |
198 | *end () = t; |
179 | ++_last; |
199 | ++_last; |
180 | } |
200 | } |
181 | void push_back (T &t) |
201 | void push_back (T &t) |
182 | { |
202 | { |
183 | reserve (_last+1); |
203 | reserve (_last+1); |
184 | *end () = t; |
204 | *end () = t; |
185 | ++_last; |
205 | ++_last; |
186 | } |
206 | } |
187 | void pop_back () |
207 | void pop_back () |
188 | { |
208 | { |
189 | //ministl_assert (size () > 0); |
209 | //ministl_assert (size () > 0); |
190 | --_last; |
210 | --_last; |
191 | } |
211 | } |
192 | const T &operator[] (size_type idx) const |
212 | const T &operator[] (size_type idx) const |
193 | { |
213 | { |
194 | //ministl_assert (idx < size ()); |
214 | //ministl_assert (idx < size ()); |
195 | return _buf[idx]; |
215 | return _buf[idx]; |
196 | } |
216 | } |
197 | T &operator[] (size_type idx) |
217 | T &operator[] (size_type idx) |
198 | { |
218 | { |
199 | //ministl_assert (idx < size ()); |
219 | //ministl_assert (idx < size ()); |
200 | return _buf[idx]; |
220 | return _buf[idx]; |
201 | } |
221 | } |
202 | iterator insert (iterator pos, const T &t) |
222 | iterator insert (iterator pos, const T &t) |
203 | { |
223 | { |
204 | //ministl_assert (pos <= end ()); |
224 | //ministl_assert (pos <= end ()); |
205 | long at = pos - begin (); |
225 | long at = pos - begin (); |
206 | reserve (pos, 1); |
226 | reserve (pos, 1); |
207 | pos = begin ()+at; |
227 | pos = begin ()+at; |
208 | *pos = t; |
228 | *pos = t; |
209 | ++_last; |
229 | ++_last; |
210 | return pos; |
230 | return pos; |
211 | } |
231 | } |
212 | iterator insert (iterator pos, const_iterator first, const_iterator last) |
232 | iterator insert (iterator pos, const_iterator first, const_iterator last) |
213 | { |
233 | { |
214 | //ministl_assert (pos <= end ()); |
234 | //ministl_assert (pos <= end ()); |
215 | long n = last - first; |
235 | long n = last - first; |
216 | long at = pos - begin (); |
236 | long at = pos - begin (); |
217 | if (n > 0) { |
237 | if (n > 0) { |
218 | reserve (pos, n); |
238 | reserve (pos, n); |
219 | pos = begin ()+at; |
239 | pos = begin ()+at; |
220 | memcpy (pos, first, (last-first)*sizeof (T)); |
240 | memcpy (pos, first, (last-first)*sizeof (T)); |
221 | _last += n; |
241 | _last += n; |
222 | } |
242 | } |
223 | return pos; |
243 | return pos; |
224 | } |
244 | } |
225 | iterator insert (iterator pos, size_type n, const T &t) |
245 | iterator insert (iterator pos, size_type n, const T &t) |
226 | { |
246 | { |
227 | //ministl_assert (pos <= end ()); |
247 | //ministl_assert (pos <= end ()); |
228 | long at = pos - begin (); |
248 | long at = pos - begin (); |
229 | if (n > 0) { |
249 | if (n > 0) { |
230 | reserve (pos, n); |
250 | reserve (pos, n); |
231 | pos = begin ()+at; |
251 | pos = begin ()+at; |
232 | for (int i = 0; i < n; ++i) |
252 | for (int i = 0; i < n; ++i) |
233 | pos[i] = t; |
253 | pos[i] = t; |
234 | _last += n; |
254 | _last += n; |
235 | } |
255 | } |
236 | return pos; |
256 | return pos; |
237 | } |
257 | } |
238 | void erase (iterator first, iterator last) |
258 | void erase (iterator first, iterator last) |
239 | { |
259 | { |
240 | if (last != first) { |
260 | if (last != first) { |
241 | memmove (first, last, (end ()-last)*sizeof (T)); |
261 | memmove (first, last, (end ()-last)*sizeof (T)); |
242 | _last -= last - first; |
262 | _last -= last - first; |
243 | } |
263 | } |
244 | } |
264 | } |
245 | void erase (iterator pos) |
265 | void erase (iterator pos) |
246 | { |
266 | { |
247 | if (pos != end ()) { |
267 | if (pos != end ()) { |
248 | memmove (pos, pos+1, (end ()- (pos+1))*sizeof (T)); |
268 | memmove (pos, pos+1, (end ()- (pos+1))*sizeof (T)); |
249 | --_last; |
269 | --_last; |
250 | } |
270 | } |
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271 | } |
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272 | void swap (simplevec<T> &t) |
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273 | { |
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274 | ::swap(_last, t._last); |
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275 | ::swap(_size, t._size); |
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276 | ::swap(_buf, t._buf); |
251 | } |
277 | } |
252 | }; |
278 | }; |
253 | |
279 | |
254 | template<class T> |
280 | template<class T> |
255 | bool operator== (const simplevec<T> &v1, const simplevec<T> &v2) |
281 | bool operator== (const simplevec<T> &v1, const simplevec<T> &v2) |
256 | { |
282 | { |
257 | if (v1.size () != v2.size ()) |
283 | if (v1.size () != v2.size ()) |
258 | return false; |
284 | return false; |
259 | return !v1.size () || !memcmp (&v1[0], &v2[0], v1.size ()*sizeof (T)); |
285 | return !v1.size () || !memcmp (&v1[0], &v2[0], v1.size ()*sizeof (T)); |
260 | } |
286 | } |
261 | |
287 | |
262 | template<class T> |
288 | template<class T> |
263 | bool operator< (const simplevec<T> &v1, const simplevec<T> &v2) |
289 | bool operator< (const simplevec<T> &v1, const simplevec<T> &v2) |
264 | { |
290 | { |
265 | unsigned long minlast = min (v1.size (), v2.size ()); |
291 | unsigned long minlast = min (v1.size (), v2.size ()); |
266 | for (unsigned long i = 0; i < minlast; ++i) { |
292 | for (unsigned long i = 0; i < minlast; ++i) { |
267 | if (v1[i] < v2[i]) |
293 | if (v1[i] < v2[i]) |
268 | return true; |
294 | return true; |
269 | if (v2[i] < v1[i]) |
295 | if (v2[i] < v1[i]) |
270 | return false; |
296 | return false; |
271 | } |
297 | } |
272 | return v1.size () < v2.size (); |
298 | return v1.size () < v2.size (); |
273 | } |
299 | } |
274 | |
300 | |
275 | |
301 | |
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369 | for (char **c = begin (); c != end (); c++) |
395 | for (char **c = begin (); c != end (); c++) |
370 | delete [] *c; |
396 | delete [] *c; |
371 | } |
397 | } |
372 | }; |
398 | }; |
373 | |
399 | |
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400 | // temporarily replace the process environment |
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401 | extern char **environ; |
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402 | |
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403 | struct temp_environ |
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404 | { |
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405 | char **prev; |
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406 | |
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407 | temp_environ (const stringvec *envv) |
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408 | : prev (environ) |
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409 | { |
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410 | if (envv) |
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411 | environ = (char **)envv->begin (); |
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412 | } |
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413 | |
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414 | ~temp_environ () |
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415 | { |
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416 | environ = prev; |
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417 | } |
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418 | }; |
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419 | |
374 | #endif |
420 | #endif |
375 | |
421 | |