1 |
#ifndef RXVT_UTIL_H |
2 |
#define RXVT_UTIL_H |
3 |
|
4 |
#include <cstring> |
5 |
|
6 |
extern class byteorder { |
7 |
static unsigned int e; // at least 32 bits |
8 |
public: |
9 |
byteorder (); |
10 |
|
11 |
static bool big_endian () { return e == 0x11223344; }; |
12 |
static bool network () { return e == 0x11223344; }; |
13 |
static bool little_endian () { return e == 0x44332211; }; |
14 |
static bool vax () { return e == 0x44332211; }; |
15 |
} byteorder; |
16 |
|
17 |
template<typename T, typename U> |
18 |
static inline T min (T a, U b) { return a < (T)b ? a : (T)b; } |
19 |
template<typename T, typename U> |
20 |
static inline T max (T a, U b) { return a > (T)b ? a : (T)b; } |
21 |
template<typename T, typename U, typename V> |
22 |
static inline T clamp (T v, U a, V b) { return v < (T)a ? a : v >(T)b ? b : v; } |
23 |
template<typename T, typename U> |
24 |
static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; } |
25 |
|
26 |
// in range including end |
27 |
#define IN_RANGE_INC(val,beg,end) \ |
28 |
((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg)) |
29 |
|
30 |
// in range excluding end |
31 |
#define IN_RANGE_EXC(val,beg,end) \ |
32 |
((unsigned int)(val) - (unsigned int)(beg) < (unsigned int)(end) - (unsigned int)(beg)) |
33 |
|
34 |
struct zero_initialized { |
35 |
void *operator new (size_t s); |
36 |
void operator delete (void *p, size_t s); |
37 |
}; |
38 |
|
39 |
/* simplevec taken (and heavily modified), from: |
40 |
* |
41 |
* MICO --- a free CORBA implementation |
42 |
* Copyright (C) 1997-98 Kay Roemer & Arno Puder |
43 |
*/ |
44 |
template<class T> |
45 |
struct simplevec { |
46 |
typedef T* iterator; |
47 |
typedef const T* const_iterator; |
48 |
typedef unsigned long size_type; |
49 |
|
50 |
private: |
51 |
size_type _last, _size; |
52 |
T *_buf; |
53 |
|
54 |
public: |
55 |
const_iterator begin () const |
56 |
{ |
57 |
return &_buf[0]; |
58 |
} |
59 |
iterator begin () |
60 |
{ |
61 |
return &_buf[0]; |
62 |
} |
63 |
const_iterator end () const |
64 |
{ |
65 |
return &_buf[_last]; |
66 |
} |
67 |
iterator end () |
68 |
{ |
69 |
return &_buf[_last]; |
70 |
} |
71 |
size_type capacity () const |
72 |
{ |
73 |
return _size; |
74 |
} |
75 |
size_type size () const |
76 |
{ |
77 |
return _last; |
78 |
} |
79 |
|
80 |
private: |
81 |
static T *alloc (size_type n) |
82 |
{ |
83 |
return (T *)::operator new ((size_t) (n * sizeof (T))); |
84 |
} |
85 |
static void dealloc (T *buf) |
86 |
{ |
87 |
if (buf) |
88 |
::operator delete (buf); |
89 |
} |
90 |
|
91 |
void reserve (iterator where, size_type n) |
92 |
{ |
93 |
if (_last + n <= _size) { |
94 |
memmove (where+n, where, (end ()-where)*sizeof (T)); |
95 |
} else { |
96 |
size_type sz = _last+n; |
97 |
sz = (_size == 0) ? max (sz, 5) : max (sz, 2*_size); |
98 |
T *nbuf = alloc (sz); |
99 |
if (_buf) { |
100 |
memcpy (nbuf, begin (), (where-begin ())*sizeof (T)); |
101 |
memcpy (nbuf + (where-begin ()) + n, where, |
102 |
(end ()-where)*sizeof (T)); |
103 |
dealloc (_buf); |
104 |
} |
105 |
_buf = nbuf; |
106 |
_size = sz; |
107 |
} |
108 |
} |
109 |
|
110 |
public: |
111 |
void reserve (size_type sz) |
112 |
{ |
113 |
if (_size < sz) { |
114 |
sz = (_size == 0) ? max (sz, 5) : max (sz, 2*_size); |
115 |
T *nbuf = alloc (sz); |
116 |
if (_buf) { |
117 |
memcpy (nbuf, begin (), size ()*sizeof (T)); |
118 |
dealloc (_buf); |
119 |
} |
120 |
_buf = nbuf; |
121 |
_size = sz; |
122 |
} |
123 |
} |
124 |
simplevec () |
125 |
: _last(0), _size(0), _buf(0) |
126 |
{ |
127 |
} |
128 |
simplevec (size_type n, const T& t = T ()) |
129 |
: _last(0), _size(0), _buf(0) |
130 |
{ |
131 |
insert (begin (), n, t); |
132 |
} |
133 |
simplevec (const_iterator first, const_iterator last) |
134 |
: _last(0), _size(0), _buf(0) |
135 |
{ |
136 |
insert (begin (), first, last); |
137 |
} |
138 |
simplevec (const simplevec<T> &v) |
139 |
: _last(0), _size(0), _buf(0) |
140 |
{ |
141 |
reserve (v._last); |
142 |
memcpy (_buf, v.begin (), v.size ()*sizeof (T)); |
143 |
_last = v._last; |
144 |
} |
145 |
simplevec<T> &operator= (const simplevec<T> &v) |
146 |
{ |
147 |
if (this != &v) { |
148 |
_last = 0; |
149 |
reserve (v._last); |
150 |
memcpy (_buf, v.begin (), v.size ()*sizeof (T)); |
151 |
_last = v._last; |
152 |
} |
153 |
return *this; |
154 |
} |
155 |
~simplevec () |
156 |
{ |
157 |
dealloc (_buf); |
158 |
} |
159 |
const T &front () const |
160 |
{ |
161 |
//ministl_assert (size () > 0); |
162 |
return _buf[0]; |
163 |
} |
164 |
T &front () |
165 |
{ |
166 |
//ministl_assert (size () > 0); |
167 |
return _buf[0]; |
168 |
} |
169 |
const T &back () const |
170 |
{ |
171 |
//ministl_assert (size () > 0); |
172 |
return _buf[_last-1]; |
173 |
} |
174 |
T &back () |
175 |
{ |
176 |
//ministl_assert (size () > 0); |
177 |
return _buf[_last-1]; |
178 |
} |
179 |
bool empty () const |
180 |
{ |
181 |
return _last == 0; |
182 |
} |
183 |
void clear () |
184 |
{ |
185 |
_last = 0; |
186 |
} |
187 |
void push_back (const T &t) |
188 |
{ |
189 |
reserve (_last+1); |
190 |
*end () = t; |
191 |
++_last; |
192 |
} |
193 |
void push_back (T &t) |
194 |
{ |
195 |
reserve (_last+1); |
196 |
*end () = t; |
197 |
++_last; |
198 |
} |
199 |
void pop_back () |
200 |
{ |
201 |
//ministl_assert (size () > 0); |
202 |
--_last; |
203 |
} |
204 |
const T &operator[] (size_type idx) const |
205 |
{ |
206 |
//ministl_assert (idx < size ()); |
207 |
return _buf[idx]; |
208 |
} |
209 |
T &operator[] (size_type idx) |
210 |
{ |
211 |
//ministl_assert (idx < size ()); |
212 |
return _buf[idx]; |
213 |
} |
214 |
iterator insert (iterator pos, const T &t) |
215 |
{ |
216 |
//ministl_assert (pos <= end ()); |
217 |
long at = pos - begin (); |
218 |
reserve (pos, 1); |
219 |
pos = begin ()+at; |
220 |
*pos = t; |
221 |
++_last; |
222 |
return pos; |
223 |
} |
224 |
iterator insert (iterator pos, const_iterator first, const_iterator last) |
225 |
{ |
226 |
//ministl_assert (pos <= end ()); |
227 |
long n = last - first; |
228 |
long at = pos - begin (); |
229 |
if (n > 0) { |
230 |
reserve (pos, n); |
231 |
pos = begin ()+at; |
232 |
memcpy (pos, first, (last-first)*sizeof (T)); |
233 |
_last += n; |
234 |
} |
235 |
return pos; |
236 |
} |
237 |
iterator insert (iterator pos, size_type n, const T &t) |
238 |
{ |
239 |
//ministl_assert (pos <= end ()); |
240 |
long at = pos - begin (); |
241 |
if (n > 0) { |
242 |
reserve (pos, n); |
243 |
pos = begin ()+at; |
244 |
for (int i = 0; i < n; ++i) |
245 |
pos[i] = t; |
246 |
_last += n; |
247 |
} |
248 |
return pos; |
249 |
} |
250 |
void erase (iterator first, iterator last) |
251 |
{ |
252 |
if (last != first) { |
253 |
memmove (first, last, (end ()-last)*sizeof (T)); |
254 |
_last -= last - first; |
255 |
} |
256 |
} |
257 |
void erase (iterator pos) |
258 |
{ |
259 |
if (pos != end ()) { |
260 |
memmove (pos, pos+1, (end ()- (pos+1))*sizeof (T)); |
261 |
--_last; |
262 |
} |
263 |
} |
264 |
void swap (simplevec<T> &t) |
265 |
{ |
266 |
::swap(_last, t._last); |
267 |
::swap(_size, t._size); |
268 |
::swap(_buf, t._buf); |
269 |
} |
270 |
}; |
271 |
|
272 |
template<class T> |
273 |
bool operator== (const simplevec<T> &v1, const simplevec<T> &v2) |
274 |
{ |
275 |
if (v1.size () != v2.size ()) |
276 |
return false; |
277 |
return !v1.size () || !memcmp (&v1[0], &v2[0], v1.size ()*sizeof (T)); |
278 |
} |
279 |
|
280 |
template<class T> |
281 |
bool operator< (const simplevec<T> &v1, const simplevec<T> &v2) |
282 |
{ |
283 |
unsigned long minlast = min (v1.size (), v2.size ()); |
284 |
for (unsigned long i = 0; i < minlast; ++i) { |
285 |
if (v1[i] < v2[i]) |
286 |
return true; |
287 |
if (v2[i] < v1[i]) |
288 |
return false; |
289 |
} |
290 |
return v1.size () < v2.size (); |
291 |
} |
292 |
|
293 |
|
294 |
template<typename T> |
295 |
struct vector : simplevec<T> |
296 |
{ }; |
297 |
|
298 |
#if 0 |
299 |
template<typename T> |
300 |
struct rxvt_vec : simplevec<void *> { |
301 |
typedef T *iterator; |
302 |
|
303 |
void push_back (T d) { simplevec<void *>::push_back ((void *)d); } |
304 |
T pop_back () { return (T*)simplevec<void *>::pop_back (); } |
305 |
void erase (int i) { erase (begin () + i); } |
306 |
void erase (iterator i) { simplevec<void *>::erase ((void **)i); } |
307 |
iterator begin () const { return (iterator)simplevec<void *>::begin (); } |
308 |
iterator end () const { return (iterator)simplevec<void *>::end (); } |
309 |
T &operator [] (int i) { return * (T *) (& ((* (simplevec<void *> *)this)[i])); } |
310 |
const T &operator [] (int i) const { return * (const T *) (& ((* (const simplevec<void *> *)this)[i])); } |
311 |
}; |
312 |
#endif |
313 |
|
314 |
template <typename I, typename T> |
315 |
I find (I first, I last, const T& value) |
316 |
{ |
317 |
while (first != last && *first != value) |
318 |
++first; |
319 |
|
320 |
return first; |
321 |
} |
322 |
|
323 |
template<typename T> |
324 |
struct auto_ptr { |
325 |
T *p; |
326 |
|
327 |
auto_ptr () : p (0) { } |
328 |
auto_ptr (T *a) : p (a) { } |
329 |
|
330 |
auto_ptr (auto_ptr<T> &a) |
331 |
{ |
332 |
p = a.p; |
333 |
a.p = 0; |
334 |
} |
335 |
|
336 |
template<typename A> |
337 |
auto_ptr (auto_ptr<A> &a) |
338 |
{ |
339 |
p = a.p; |
340 |
a.p = 0; |
341 |
} |
342 |
|
343 |
~auto_ptr () |
344 |
{ |
345 |
delete p; |
346 |
} |
347 |
|
348 |
// void because it makes sense in our context |
349 |
void operator = (T *a) |
350 |
{ |
351 |
delete p; |
352 |
p = a; |
353 |
} |
354 |
|
355 |
void operator = (auto_ptr &a) |
356 |
{ |
357 |
*this = a.p; |
358 |
a.p = 0; |
359 |
} |
360 |
|
361 |
template<typename A> |
362 |
void operator = (auto_ptr<A> &a) |
363 |
{ |
364 |
*this = a.p; |
365 |
a.p = 0; |
366 |
} |
367 |
|
368 |
operator T * () const { return p; } |
369 |
|
370 |
T *operator -> () const { return p; } |
371 |
T &operator * () const { return *p; } |
372 |
|
373 |
T *get () |
374 |
{ |
375 |
T *r = p; |
376 |
p = 0; |
377 |
return r; |
378 |
} |
379 |
}; |
380 |
|
381 |
typedef auto_ptr<char> auto_str; |
382 |
|
383 |
struct stringvec : simplevec<char *> |
384 |
{ |
385 |
~stringvec () |
386 |
{ |
387 |
for (char **c = begin (); c != end (); c++) |
388 |
delete [] *c; |
389 |
} |
390 |
}; |
391 |
|
392 |
#endif |
393 |
|