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Comparing rxvt-unicode/src/rxvtutil.h (file contents):
Revision 1.36 by ayin, Fri Dec 14 11:11:31 2007 UTC vs.
Revision 1.65 by sf-exg, Thu May 13 19:40:20 2021 UTC

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
7using namespace std; 7#define ECB_NO_THREADS 1
8#include "ecb.h"
8 9
9#define PP_CONCAT_(a, b) a ## b 10#include "estl.h"
10#define PP_CONCAT(a, b) PP_CONCAT_(a, b)
11#define PP_STRINGIFY_(a) #a
12#define PP_STRINGIFY(a) PP_STRINGIFY_(a)
13 11
14#define HAVE_GCC_BUILTINS (__GNUC__ >= 4 || (__GNUC__ == 3 && __GNUC_MINOR__ == 4)) 12#include "emman.h"
15
16#if __GNUC__ >= 4
17# define rxvt_attribute(x) __attribute__(x)
18#else
19# define rxvt_attribute(x)
20#endif
21
22#define NORETURN rxvt_attribute ((noreturn))
23#define UNUSED rxvt_attribute ((unused))
24#define CONST rxvt_attribute ((const))
25
26// increases code size unless -fno-enforce-eh-specs
27#if __GNUC__
28# define NOTHROW
29# define THROW(x)
30#else
31# define NOTHROW throw()
32# define THROW(x) throw x
33#endif
34
35extern class byteorder {
36 static unsigned int e; // at least 32 bits
37public:
38 byteorder ();
39
40 static bool big_endian () { return e == 0x11223344; };
41 static bool network () { return e == 0x11223344; };
42 static bool little_endian () { return e == 0x44332211; };
43 static bool vax () { return e == 0x44332211; };
44} byteorder;
45 13
46// various utility functions 14// various utility functions
47template<typename T, typename U> static inline T min (T a, U b) { return a < (T)b ? a : (T)b; }
48template<typename T, typename U> static inline void min_it (T &a, U b) { a = a < (T)b ? a : (T)b; } 15template<typename T, typename U> static inline void min_it (T &a, U b) { a = a < (T)b ? a : (T)b; }
49template<typename T, typename U> static inline T max (T a, U b) { return a > (T)b ? a : (T)b; }
50template<typename T, typename U> static inline void max_it (T &a, U b) { a = a > (T)b ? a : (T)b; } 16template<typename T, typename U> static inline void max_it (T &a, U b) { a = a > (T)b ? a : (T)b; }
51 17
52template<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; } 18template<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; }
53template<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; } 19template<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; }
54 20
55template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; }
56
57template<typename T> static inline T squared_diff (T a, T b) { return (a-b)*(a-b); }
58
59// linear interpolation 21// linear interpolation
60template<typename T, typename U, typename P> 22template<typename T, typename U, typename P>
61static inline 23static inline T
62T lerp (T a, U b, P p) 24lerp (T a, U b, P p)
63{ 25{
64 return (long(a) * long(100 - p) + long(b) * long(p) + 50) / 100; 26 return (long(a) * long(100 - p) + long(b) * long(p) + 50) / 100;
65}
66
67template <typename I, typename T>
68I find (I first, I last, const T& value)
69{
70 while (first != last && *first != value)
71 ++first;
72
73 return first;
74} 27}
75 28
76// return a very temporary (and never deallocated) buffer. keep small. 29// return a very temporary (and never deallocated) buffer. keep small.
77void *rxvt_temp_buf (int len); 30void *rxvt_temp_buf (int len);
78 31
… …
80static inline T * 33static inline T *
81rxvt_temp_buf (int len) 34rxvt_temp_buf (int len)
82{ 35{
83 return (T *)rxvt_temp_buf (len * sizeof (T)); 36 return (T *)rxvt_temp_buf (len * sizeof (T));
84} 37}
85
86// some bit functions, xft fuck me plenty
87#if HAVE_GCC_BUILTINS
88static inline int ctz (unsigned int x) { return __builtin_ctz (x); }
89static inline int popcount (unsigned int x) { return __builtin_popcount (x); }
90#else
91// count trailing zero bits and count # of one bits
92int ctz (unsigned int x) CONST;
93int popcount (unsigned int x) CONST;
94#endif
95 38
96// in range including end 39// in range including end
97#define IN_RANGE_INC(val,beg,end) \ 40#define IN_RANGE_INC(val,beg,end) \
98 ((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg)) 41 ((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg))
99 42
… …
103 46
104// for m >= -n, ensure remainder lies between 0..n-1 47// for m >= -n, ensure remainder lies between 0..n-1
105#define MOD(m,n) (((m) + (n)) % (n)) 48#define MOD(m,n) (((m) + (n)) % (n))
106 49
107// makes dynamically allocated objects zero-initialised 50// makes dynamically allocated objects zero-initialised
108struct zero_initialized { 51struct zero_initialized
52{
109 void *operator new (size_t s); 53 void *operator new (size_t s);
110 void operator delete (void *p, size_t s); 54 void operator delete (void *p, size_t s);
111};
112
113/* simplevec taken (and heavily modified), from:
114 *
115 * MICO --- a free CORBA implementation
116 * Copyright (C) 1997-98 Kay Roemer & Arno Puder
117 */
118template<class T>
119struct simplevec {
120 typedef T* iterator;
121 typedef const T* const_iterator;
122 typedef unsigned long size_type;
123
124private:
125 size_type _last, _size;
126 T *_buf;
127
128public:
129 const_iterator begin () const
130 {
131 return &_buf[0];
132 }
133 iterator begin ()
134 {
135 return &_buf[0];
136 }
137 const_iterator end () const
138 {
139 return &_buf[_last];
140 }
141 iterator end ()
142 {
143 return &_buf[_last];
144 }
145 size_type capacity () const
146 {
147 return _size;
148 }
149 size_type size () const
150 {
151 return _last;
152 }
153
154private:
155 static T *alloc (size_type n)
156 {
157 return (T *)::operator new ((size_t) (n * sizeof (T)));
158 }
159 static void dealloc (T *buf)
160 {
161 if (buf)
162 ::operator delete (buf);
163 }
164
165 void reserve (iterator where, size_type n)
166 {
167 if (_last + n <= _size) {
168 memmove (where+n, where, (end ()-where)*sizeof (T));
169 } else {
170 size_type sz = _last+n;
171 sz = (_size == 0) ? max (sz, 5) : max (sz, 2*_size);
172 T *nbuf = alloc (sz);
173 if (_buf) {
174 memcpy (nbuf, begin (), (where-begin ())*sizeof (T));
175 memcpy (nbuf + (where-begin ()) + n, where,
176 (end ()-where)*sizeof (T));
177 dealloc (_buf);
178 }
179 _buf = nbuf;
180 _size = sz;
181 }
182 }
183
184public:
185 void reserve (size_type sz)
186 {
187 if (_size < sz) {
188 sz = (_size == 0) ? max (sz, 5) : max (sz, 2*_size);
189 T *nbuf = alloc (sz);
190 if (_buf) {
191 memcpy (nbuf, begin (), size ()*sizeof (T));
192 dealloc (_buf);
193 }
194 _buf = nbuf;
195 _size = sz;
196 }
197 }
198 simplevec ()
199 : _last(0), _size(0), _buf(0)
200 {
201 }
202 simplevec (size_type n, const T& t = T ())
203 : _last(0), _size(0), _buf(0)
204 {
205 insert (begin (), n, t);
206 }
207 simplevec (const_iterator first, const_iterator last)
208 : _last(0), _size(0), _buf(0)
209 {
210 insert (begin (), first, last);
211 }
212 simplevec (const simplevec<T> &v)
213 : _last(0), _size(0), _buf(0)
214 {
215 reserve (v._last);
216 memcpy (_buf, v.begin (), v.size ()*sizeof (T));
217 _last = v._last;
218 }
219 simplevec<T> &operator= (const simplevec<T> &v)
220 {
221 if (this != &v) {
222 _last = 0;
223 reserve (v._last);
224 memcpy (_buf, v.begin (), v.size ()*sizeof (T));
225 _last = v._last;
226 }
227 return *this;
228 }
229 ~simplevec ()
230 {
231 dealloc (_buf);
232 }
233 const T &front () const
234 {
235 //ministl_assert (size () > 0);
236 return _buf[0];
237 }
238 T &front ()
239 {
240 //ministl_assert (size () > 0);
241 return _buf[0];
242 }
243 const T &back () const
244 {
245 //ministl_assert (size () > 0);
246 return _buf[_last-1];
247 }
248 T &back ()
249 {
250 //ministl_assert (size () > 0);
251 return _buf[_last-1];
252 }
253 bool empty () const
254 {
255 return _last == 0;
256 }
257 void clear ()
258 {
259 _last = 0;
260 }
261 void push_back (const T &t)
262 {
263 reserve (_last+1);
264 *end () = t;
265 ++_last;
266 }
267 void push_back (T &t)
268 {
269 reserve (_last+1);
270 *end () = t;
271 ++_last;
272 }
273 void pop_back ()
274 {
275 //ministl_assert (size () > 0);
276 --_last;
277 }
278 const T &operator[] (size_type idx) const
279 {
280 //ministl_assert (idx < size ());
281 return _buf[idx];
282 }
283 T &operator[] (size_type idx)
284 {
285 //ministl_assert (idx < size ());
286 return _buf[idx];
287 }
288 iterator insert (iterator pos, const T &t)
289 {
290 //ministl_assert (pos <= end ());
291 long at = pos - begin ();
292 reserve (pos, 1);
293 pos = begin ()+at;
294 *pos = t;
295 ++_last;
296 return pos;
297 }
298 iterator insert (iterator pos, const_iterator first, const_iterator last)
299 {
300 //ministl_assert (pos <= end ());
301 long n = last - first;
302 long at = pos - begin ();
303 if (n > 0) {
304 reserve (pos, n);
305 pos = begin ()+at;
306 memcpy (pos, first, (last-first)*sizeof (T));
307 _last += n;
308 }
309 return pos;
310 }
311 iterator insert (iterator pos, size_type n, const T &t)
312 {
313 //ministl_assert (pos <= end ());
314 long at = pos - begin ();
315 if (n > 0) {
316 reserve (pos, n);
317 pos = begin ()+at;
318 for (int i = 0; i < n; ++i)
319 pos[i] = t;
320 _last += n;
321 }
322 return pos;
323 }
324 void erase (iterator first, iterator last)
325 {
326 if (last != first) {
327 memmove (first, last, (end () - last) * sizeof (T));
328 _last -= last - first;
329 }
330 }
331 void erase (iterator pos)
332 {
333 if (pos != end ()) {
334 memmove (pos, pos+1, (end () - (pos+1)) * sizeof (T));
335 --_last;
336 }
337 }
338 void swap (simplevec<T> &t)
339 {
340 ::swap(_last, t._last);
341 ::swap(_size, t._size);
342 ::swap(_buf, t._buf);
343 }
344};
345
346template<class T>
347bool operator== (const simplevec<T> &v1, const simplevec<T> &v2)
348{
349 if (v1.size () != v2.size ())
350 return false;
351 return !v1.size () || !memcmp (&v1[0], &v2[0], v1.size ()*sizeof (T));
352}
353
354template<class T>
355bool operator< (const simplevec<T> &v1, const simplevec<T> &v2)
356{
357 unsigned long minlast = min (v1.size (), v2.size ());
358 for (unsigned long i = 0; i < minlast; ++i) {
359 if (v1[i] < v2[i])
360 return true;
361 if (v2[i] < v1[i])
362 return false;
363 }
364 return v1.size () < v2.size ();
365}
366
367
368template<typename T>
369struct vector : simplevec<T>
370{
371}; 55};
372 56
373struct stringvec : simplevec<char *> 57struct stringvec : simplevec<char *>
374{ 58{
375 ~stringvec () 59 ~stringvec ()
… …
379 } 63 }
380}; 64};
381 65
382#if 0 66#if 0
383template<typename T> 67template<typename T>
384struct rxvt_vec : simplevec<void *> { 68struct rxvt_vec : simplevec<void *>
69{
385 typedef T *iterator; 70 typedef T *iterator;
386 71
387 void push_back (T d) { simplevec<void *>::push_back ((void *)d); } 72 void push_back (T d) { simplevec<void *>::push_back ((void *)d); }
388 T pop_back () { return (T*)simplevec<void *>::pop_back (); } 73 T pop_back () { return (T*)simplevec<void *>::pop_back (); }
389 void erase (int i) { erase (begin () + i); } 74 void erase (int i) { erase (begin () + i); }
… …
393 T &operator [] (int i) { return * (T *) (& ((* (simplevec<void *> *)this)[i])); } 78 T &operator [] (int i) { return * (T *) (& ((* (simplevec<void *> *)this)[i])); }
394 const T &operator [] (int i) const { return * (const T *) (& ((* (const simplevec<void *> *)this)[i])); } 79 const T &operator [] (int i) const { return * (const T *) (& ((* (const simplevec<void *> *)this)[i])); }
395}; 80};
396#endif 81#endif
397 82
398template<typename T> 83typedef estl::scoped_array<char> auto_str;
399struct auto_ptr {
400 T *p;
401
402 auto_ptr () : p (0) { }
403 auto_ptr (T *a) : p (a) { }
404
405 auto_ptr (auto_ptr<T> &a)
406 {
407 p = a.p;
408 a.p = 0;
409 }
410
411 template<typename A>
412 auto_ptr (auto_ptr<A> &a)
413 {
414 p = a.p;
415 a.p = 0;
416 }
417
418 ~auto_ptr ()
419 {
420 delete p;
421 }
422
423 // void because it makes sense in our context
424 void operator = (T *a)
425 {
426 delete p;
427 p = a;
428 }
429
430 void operator = (auto_ptr &a)
431 {
432 *this = a.p;
433 a.p = 0;
434 }
435
436 template<typename A>
437 void operator = (auto_ptr<A> &a)
438 {
439 *this = a.p;
440 a.p = 0;
441 }
442
443 operator T * () const { return p; }
444
445 T *operator -> () const { return p; }
446 T &operator * () const { return *p; }
447
448 T *get ()
449 {
450 T *r = p;
451 p = 0;
452 return r;
453 }
454};
455
456typedef auto_ptr<char> auto_str;
457 84
458#endif 85#endif
459 86

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