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 <cstring> |
5 | #include <cstring> |
|
|
6 | |
|
|
7 | #define PP_CONCAT_(a, b) a ## b |
|
|
8 | #define PP_CONCAT(a, b) PP_CONCAT_(a, b) |
|
|
9 | #define PP_STRINGIFY_(a) #a |
|
|
10 | #define PP_STRINGIFY(a) PP_STRINGIFY_(a) |
|
|
11 | |
|
|
12 | // actually, some gcc-3.x versions work, too |
|
|
13 | #define HAVE_GCC_BUILTINS (__GNUC__ >= 4) |
5 | |
14 | |
6 | extern class byteorder { |
15 | extern class byteorder { |
7 | static unsigned int e; // at least 32 bits |
16 | static unsigned int e; // at least 32 bits |
8 | public: |
17 | public: |
9 | byteorder (); |
18 | byteorder (); |
… | |
… | |
12 | static bool network () { return e == 0x11223344; }; |
21 | static bool network () { return e == 0x11223344; }; |
13 | static bool little_endian () { return e == 0x44332211; }; |
22 | static bool little_endian () { return e == 0x44332211; }; |
14 | static bool vax () { return e == 0x44332211; }; |
23 | static bool vax () { return e == 0x44332211; }; |
15 | } byteorder; |
24 | } byteorder; |
16 | |
25 | |
|
|
26 | // various utility functions |
|
|
27 | template<typename T, typename U> static inline T min (T a, U b) { return a < (T)b ? a : (T)b; } |
|
|
28 | template<typename T, typename U> static inline void min_it (T &a, U b) { a = a < (T)b ? a : (T)b; } |
|
|
29 | template<typename T, typename U> static inline T max (T a, U b) { return a > (T)b ? a : (T)b; } |
|
|
30 | template<typename T, typename U> static inline void max_it (T &a, U b) { a = a > (T)b ? a : (T)b; } |
|
|
31 | |
|
|
32 | 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; } |
|
|
33 | 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; } |
|
|
34 | |
|
|
35 | template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; } |
|
|
36 | |
|
|
37 | // linear interpolation |
17 | template<typename T, typename U> |
38 | template<typename T, typename U, typename P> |
18 | static inline T min (T a, U b) { return a < b ? a : (T)b; } |
39 | static inline |
19 | template<typename T, typename U> |
40 | T lerp (T a, U b, P p) |
20 | static inline T max (T a, U b) { return a > b ? a : (T)b; } |
41 | { |
|
|
42 | return (int(a) * int(p) + int(b) * int(100 - p)) / 100; |
|
|
43 | } |
21 | |
44 | |
|
|
45 | // some bit functions, xft fuck me plenty |
|
|
46 | #if HAVE_GCC_BUILTINS |
|
|
47 | static inline int ctz (unsigned int x) { return __builtin_ctz (x); } |
|
|
48 | static inline int popcount (unsigned int x) { return __builtin_popcount (x); } |
|
|
49 | #else |
|
|
50 | // count trailing zero bits and count # of one bits |
|
|
51 | int ctz (unsigned int x); |
|
|
52 | int popcount (unsigned int x); |
|
|
53 | #endif |
|
|
54 | |
|
|
55 | // in range including end |
|
|
56 | #define IN_RANGE_INC(val,beg,end) \ |
|
|
57 | ((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg)) |
|
|
58 | |
|
|
59 | // in range excluding end |
|
|
60 | #define IN_RANGE_EXC(val,beg,end) \ |
|
|
61 | ((unsigned int)(val) - (unsigned int)(beg) < (unsigned int)(end) - (unsigned int)(beg)) |
|
|
62 | |
|
|
63 | // makes dynamically allocated objects zero-initialised |
22 | struct zero_initialized { |
64 | struct zero_initialized { |
23 | void *operator new (size_t s); |
65 | void *operator new (size_t s); |
24 | void operator delete (void *p, size_t s); |
66 | void operator delete (void *p, size_t s); |
25 | }; |
67 | }; |
26 | |
68 | |
… | |
… | |
40 | T *_buf; |
82 | T *_buf; |
41 | |
83 | |
42 | public: |
84 | public: |
43 | const_iterator begin () const |
85 | const_iterator begin () const |
44 | { |
86 | { |
45 | return &_buf[0]; |
87 | return &_buf[0]; |
46 | } |
88 | } |
47 | iterator begin () |
89 | iterator begin () |
48 | { |
90 | { |
49 | return &_buf[0]; |
91 | return &_buf[0]; |
50 | } |
92 | } |
51 | const_iterator end () const |
93 | const_iterator end () const |
52 | { |
94 | { |
53 | return &_buf[_last]; |
95 | return &_buf[_last]; |
54 | } |
96 | } |
55 | iterator end () |
97 | iterator end () |
56 | { |
98 | { |
57 | return &_buf[_last]; |
99 | return &_buf[_last]; |
58 | } |
100 | } |
59 | size_type capacity () const |
101 | size_type capacity () const |
60 | { |
102 | { |
61 | return _size; |
103 | return _size; |
62 | } |
104 | } |
63 | size_type size () const |
105 | size_type size () const |
64 | { |
106 | { |
65 | return _last; |
107 | return _last; |
66 | } |
108 | } |
67 | |
109 | |
68 | private: |
110 | private: |
69 | static T *alloc (size_type n) |
111 | static T *alloc (size_type n) |
70 | { |
112 | { |
71 | return (T *)::operator new ((size_t) (n * sizeof (T))); |
113 | return (T *)::operator new ((size_t) (n * sizeof (T))); |
72 | } |
114 | } |
73 | static void dealloc (T *buf) |
115 | static void dealloc (T *buf) |
74 | { |
116 | { |
75 | if (buf) |
117 | if (buf) |
76 | ::operator delete (buf); |
118 | ::operator delete (buf); |
77 | } |
119 | } |
78 | |
120 | |
79 | void reserve (iterator where, size_type n) |
121 | void reserve (iterator where, size_type n) |
80 | { |
122 | { |
81 | if (_last + n <= _size) { |
123 | if (_last + n <= _size) { |
82 | memmove (where+n, where, (end ()-where)*sizeof (T)); |
124 | memmove (where+n, where, (end ()-where)*sizeof (T)); |
83 | } else { |
125 | } else { |
84 | size_type sz = _last+n; |
126 | size_type sz = _last+n; |
85 | sz = (_size == 0) ? max (sz, 5) : max (sz, 2*_size); |
127 | sz = (_size == 0) ? max (sz, 5) : max (sz, 2*_size); |
86 | T *nbuf = alloc (sz); |
128 | T *nbuf = alloc (sz); |
87 | if (_buf) { |
129 | if (_buf) { |
88 | memcpy (nbuf, begin (), (where-begin ())*sizeof (T)); |
130 | memcpy (nbuf, begin (), (where-begin ())*sizeof (T)); |
89 | memcpy (nbuf + (where-begin ()) + n, where, |
131 | memcpy (nbuf + (where-begin ()) + n, where, |
90 | (end ()-where)*sizeof (T)); |
132 | (end ()-where)*sizeof (T)); |
91 | dealloc (_buf); |
133 | dealloc (_buf); |
92 | } |
134 | } |
93 | _buf = nbuf; |
135 | _buf = nbuf; |
94 | _size = sz; |
136 | _size = sz; |
95 | } |
137 | } |
96 | } |
138 | } |
97 | |
139 | |
98 | public: |
140 | public: |
99 | void reserve (size_type sz) |
141 | void reserve (size_type sz) |
100 | { |
142 | { |
101 | if (_size < sz) { |
143 | if (_size < sz) { |
102 | sz = (_size == 0) ? max (sz, 5) : max (sz, 2*_size); |
144 | sz = (_size == 0) ? max (sz, 5) : max (sz, 2*_size); |
103 | T *nbuf = alloc (sz); |
145 | T *nbuf = alloc (sz); |
104 | if (_buf) { |
146 | if (_buf) { |
105 | memcpy (nbuf, begin (), size ()*sizeof (T)); |
147 | memcpy (nbuf, begin (), size ()*sizeof (T)); |
106 | dealloc (_buf); |
148 | dealloc (_buf); |
107 | } |
149 | } |
108 | _buf = nbuf; |
150 | _buf = nbuf; |
109 | _size = sz; |
151 | _size = sz; |
110 | } |
152 | } |
111 | } |
153 | } |
112 | simplevec () |
154 | simplevec () |
113 | : _last(0), _size(0), _buf(0) |
155 | : _last(0), _size(0), _buf(0) |
114 | { |
156 | { |
115 | } |
157 | } |
116 | simplevec (size_type n, const T& t = T ()) |
158 | simplevec (size_type n, const T& t = T ()) |
117 | : _last(0), _size(0), _buf(0) |
159 | : _last(0), _size(0), _buf(0) |
118 | { |
160 | { |
119 | insert (begin (), n, t); |
161 | insert (begin (), n, t); |
120 | } |
162 | } |
121 | simplevec (const_iterator first, const_iterator last) |
163 | simplevec (const_iterator first, const_iterator last) |
122 | : _last(0), _size(0), _buf(0) |
164 | : _last(0), _size(0), _buf(0) |
123 | { |
165 | { |
124 | insert (begin (), first, last); |
166 | insert (begin (), first, last); |
125 | } |
167 | } |
126 | simplevec (const simplevec<T> &v) |
168 | simplevec (const simplevec<T> &v) |
127 | : _last(0), _size(0), _buf(0) |
169 | : _last(0), _size(0), _buf(0) |
128 | { |
170 | { |
129 | reserve (v._last); |
171 | reserve (v._last); |
130 | memcpy (_buf, v.begin (), v.size ()*sizeof (T)); |
172 | memcpy (_buf, v.begin (), v.size ()*sizeof (T)); |
131 | _last = v._last; |
173 | _last = v._last; |
132 | } |
174 | } |
133 | simplevec<T> &operator= (const simplevec<T> &v) |
175 | simplevec<T> &operator= (const simplevec<T> &v) |
134 | { |
176 | { |
135 | if (this != &v) { |
177 | if (this != &v) { |
136 | _last = 0; |
178 | _last = 0; |
137 | reserve (v._last); |
179 | reserve (v._last); |
138 | memcpy (_buf, v.begin (), v.size ()*sizeof (T)); |
180 | memcpy (_buf, v.begin (), v.size ()*sizeof (T)); |
139 | _last = v._last; |
181 | _last = v._last; |
140 | } |
182 | } |
141 | return *this; |
183 | return *this; |
142 | } |
184 | } |
143 | ~simplevec () |
185 | ~simplevec () |
144 | { |
186 | { |
145 | dealloc (_buf); |
187 | dealloc (_buf); |
146 | } |
188 | } |
147 | const T &front () const |
189 | const T &front () const |
148 | { |
190 | { |
149 | //ministl_assert (size () > 0); |
191 | //ministl_assert (size () > 0); |
150 | return _buf[0]; |
192 | return _buf[0]; |
151 | } |
193 | } |
152 | T &front () |
194 | T &front () |
153 | { |
195 | { |
154 | //ministl_assert (size () > 0); |
196 | //ministl_assert (size () > 0); |
155 | return _buf[0]; |
197 | return _buf[0]; |
156 | } |
198 | } |
157 | const T &back () const |
199 | const T &back () const |
158 | { |
200 | { |
159 | //ministl_assert (size () > 0); |
201 | //ministl_assert (size () > 0); |
160 | return _buf[_last-1]; |
202 | return _buf[_last-1]; |
161 | } |
203 | } |
162 | T &back () |
204 | T &back () |
163 | { |
205 | { |
164 | //ministl_assert (size () > 0); |
206 | //ministl_assert (size () > 0); |
165 | return _buf[_last-1]; |
207 | return _buf[_last-1]; |
166 | } |
208 | } |
167 | bool empty () const |
209 | bool empty () const |
168 | { |
210 | { |
169 | return _last == 0; |
211 | return _last == 0; |
170 | } |
212 | } |
171 | void clear () |
213 | void clear () |
172 | { |
214 | { |
173 | _last = 0; |
215 | _last = 0; |
174 | } |
216 | } |
175 | void push_back (const T &t) |
217 | void push_back (const T &t) |
176 | { |
218 | { |
177 | reserve (_last+1); |
219 | reserve (_last+1); |
178 | *end () = t; |
220 | *end () = t; |
179 | ++_last; |
221 | ++_last; |
180 | } |
222 | } |
181 | void push_back (T &t) |
223 | void push_back (T &t) |
182 | { |
224 | { |
183 | reserve (_last+1); |
225 | reserve (_last+1); |
184 | *end () = t; |
226 | *end () = t; |
185 | ++_last; |
227 | ++_last; |
186 | } |
228 | } |
187 | void pop_back () |
229 | void pop_back () |
188 | { |
230 | { |
189 | //ministl_assert (size () > 0); |
231 | //ministl_assert (size () > 0); |
190 | --_last; |
232 | --_last; |
191 | } |
233 | } |
192 | const T &operator[] (size_type idx) const |
234 | const T &operator[] (size_type idx) const |
193 | { |
235 | { |
194 | //ministl_assert (idx < size ()); |
236 | //ministl_assert (idx < size ()); |
195 | return _buf[idx]; |
237 | return _buf[idx]; |
196 | } |
238 | } |
197 | T &operator[] (size_type idx) |
239 | T &operator[] (size_type idx) |
198 | { |
240 | { |
199 | //ministl_assert (idx < size ()); |
241 | //ministl_assert (idx < size ()); |
200 | return _buf[idx]; |
242 | return _buf[idx]; |
201 | } |
243 | } |
202 | iterator insert (iterator pos, const T &t) |
244 | iterator insert (iterator pos, const T &t) |
203 | { |
245 | { |
204 | //ministl_assert (pos <= end ()); |
246 | //ministl_assert (pos <= end ()); |
205 | long at = pos - begin (); |
247 | long at = pos - begin (); |
206 | reserve (pos, 1); |
248 | reserve (pos, 1); |
207 | pos = begin ()+at; |
249 | pos = begin ()+at; |
208 | *pos = t; |
250 | *pos = t; |
209 | ++_last; |
251 | ++_last; |
210 | return pos; |
252 | return pos; |
211 | } |
253 | } |
212 | iterator insert (iterator pos, const_iterator first, const_iterator last) |
254 | iterator insert (iterator pos, const_iterator first, const_iterator last) |
213 | { |
255 | { |
214 | //ministl_assert (pos <= end ()); |
256 | //ministl_assert (pos <= end ()); |
215 | long n = last - first; |
257 | long n = last - first; |
216 | long at = pos - begin (); |
258 | long at = pos - begin (); |
217 | if (n > 0) { |
259 | if (n > 0) { |
218 | reserve (pos, n); |
260 | reserve (pos, n); |
219 | pos = begin ()+at; |
261 | pos = begin ()+at; |
220 | memcpy (pos, first, (last-first)*sizeof (T)); |
262 | memcpy (pos, first, (last-first)*sizeof (T)); |
221 | _last += n; |
263 | _last += n; |
222 | } |
264 | } |
223 | return pos; |
265 | return pos; |
224 | } |
266 | } |
225 | iterator insert (iterator pos, size_type n, const T &t) |
267 | iterator insert (iterator pos, size_type n, const T &t) |
226 | { |
268 | { |
227 | //ministl_assert (pos <= end ()); |
269 | //ministl_assert (pos <= end ()); |
228 | long at = pos - begin (); |
270 | long at = pos - begin (); |
229 | if (n > 0) { |
271 | if (n > 0) { |
230 | reserve (pos, n); |
272 | reserve (pos, n); |
231 | pos = begin ()+at; |
273 | pos = begin ()+at; |
232 | for (int i = 0; i < n; ++i) |
274 | for (int i = 0; i < n; ++i) |
233 | pos[i] = t; |
275 | pos[i] = t; |
234 | _last += n; |
276 | _last += n; |
235 | } |
277 | } |
236 | return pos; |
278 | return pos; |
237 | } |
279 | } |
238 | void erase (iterator first, iterator last) |
280 | void erase (iterator first, iterator last) |
239 | { |
281 | { |
240 | if (last != first) { |
282 | if (last != first) { |
241 | memmove (first, last, (end ()-last)*sizeof (T)); |
283 | memmove (first, last, (end () - last) * sizeof (T)); |
242 | _last -= last - first; |
284 | _last -= last - first; |
243 | } |
285 | } |
244 | } |
286 | } |
245 | void erase (iterator pos) |
287 | void erase (iterator pos) |
246 | { |
288 | { |
247 | if (pos != end ()) { |
289 | if (pos != end ()) { |
248 | memmove (pos, pos+1, (end ()- (pos+1))*sizeof (T)); |
290 | memmove (pos, pos+1, (end () - (pos+1)) * sizeof (T)); |
249 | --_last; |
291 | --_last; |
250 | } |
292 | } |
|
|
293 | } |
|
|
294 | void swap (simplevec<T> &t) |
|
|
295 | { |
|
|
296 | ::swap(_last, t._last); |
|
|
297 | ::swap(_size, t._size); |
|
|
298 | ::swap(_buf, t._buf); |
251 | } |
299 | } |
252 | }; |
300 | }; |
253 | |
301 | |
254 | template<class T> |
302 | template<class T> |
255 | bool operator== (const simplevec<T> &v1, const simplevec<T> &v2) |
303 | bool operator== (const simplevec<T> &v1, const simplevec<T> &v2) |
256 | { |
304 | { |
257 | if (v1.size () != v2.size ()) |
305 | if (v1.size () != v2.size ()) |
258 | return false; |
306 | return false; |
259 | return !v1.size () || !memcmp (&v1[0], &v2[0], v1.size ()*sizeof (T)); |
307 | return !v1.size () || !memcmp (&v1[0], &v2[0], v1.size ()*sizeof (T)); |
260 | } |
308 | } |
261 | |
309 | |
262 | template<class T> |
310 | template<class T> |
263 | bool operator< (const simplevec<T> &v1, const simplevec<T> &v2) |
311 | bool operator< (const simplevec<T> &v1, const simplevec<T> &v2) |
264 | { |
312 | { |
265 | unsigned long minlast = min (v1.size (), v2.size ()); |
313 | unsigned long minlast = min (v1.size (), v2.size ()); |
266 | for (unsigned long i = 0; i < minlast; ++i) { |
314 | for (unsigned long i = 0; i < minlast; ++i) { |
267 | if (v1[i] < v2[i]) |
315 | if (v1[i] < v2[i]) |
268 | return true; |
316 | return true; |
269 | if (v2[i] < v1[i]) |
317 | if (v2[i] < v1[i]) |
270 | return false; |
318 | return false; |
271 | } |
319 | } |
272 | return v1.size () < v2.size (); |
320 | return v1.size () < v2.size (); |
273 | } |
321 | } |
274 | |
322 | |
275 | |
323 | |
… | |
… | |
365 | struct stringvec : simplevec<char *> |
413 | struct stringvec : simplevec<char *> |
366 | { |
414 | { |
367 | ~stringvec () |
415 | ~stringvec () |
368 | { |
416 | { |
369 | for (char **c = begin (); c != end (); c++) |
417 | for (char **c = begin (); c != end (); c++) |
370 | delete [] *c; |
418 | free (*c); |
371 | } |
419 | } |
372 | }; |
420 | }; |
373 | |
421 | |
|
|
422 | // return a very temporary (and never deallocated) buffer. keep small. |
|
|
423 | void *rxvt_temp_buf (int len); |
|
|
424 | |
|
|
425 | template<typename T> |
|
|
426 | inline T * |
|
|
427 | rxvt_temp_buf (int len) |
|
|
428 | { |
|
|
429 | return (T *)rxvt_temp_buf (len * sizeof (T)); |
|
|
430 | } |
|
|
431 | |
374 | #endif |
432 | #endif |
375 | |
433 | |