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/cvs/rxvt-unicode/src/rxvtutil.h
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Comparing rxvt-unicode/src/rxvtutil.h (file contents):
Revision 1.10 by root, Mon Nov 28 19:35:04 2005 UTC vs.
Revision 1.48 by root, Thu Jan 19 17:10:51 2012 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 <stdlib.h>
4#include <cstring> 5#include <string.h>
6#include "ecb.h"
5 7
6extern class byteorder { 8// increases code size unless -fno-enforce-eh-specs
7 static unsigned int e; // at least 32 bits 9#if __GNUC__
8public: 10# define NOTHROW
9 byteorder (); 11# define THROW(x)
12#else
13# define NOTHROW throw()
14# define THROW(x) throw x
15#endif
10 16
11 static bool big_endian () { return e == 0x11223344; }; 17// various utility functions
12 static bool network () { return e == 0x11223344; }; 18template<typename T, typename U> static inline T min (T a, U b) { return a < (T)b ? a : (T)b; }
13 static bool little_endian () { return e == 0x44332211; }; 19template<typename T, typename U> static inline void min_it (T &a, U b) { a = a < (T)b ? a : (T)b; }
14 static bool vax () { return e == 0x44332211; }; 20template<typename T, typename U> static inline T max (T a, U b) { return a > (T)b ? a : (T)b; }
15} byteorder; 21template<typename T, typename U> static inline void max_it (T &a, U b) { a = a > (T)b ? a : (T)b; }
16 22
23template<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; }
24template<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; }
25
26template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; }
27
28template<typename T> static inline T squared_diff (T a, T b) { return (a-b)*(a-b); }
29
30// linear interpolation
31template<typename T, typename U, typename P>
32static inline
33T lerp (T a, U b, P p)
34{
35 return (long(a) * long(100 - p) + long(b) * long(p) + 50) / 100;
36}
37
17template<typename T, typename U> 38template <typename I, typename T>
18static inline T min (T a, U b) { return a < (T)b ? a : (T)b; } 39I find (I first, I last, const T& value)
19template<typename T, typename U> 40{
20static inline T max (T a, U b) { return a > (T)b ? a : (T)b; } 41 while (first != last && *first != value)
42 ++first;
43
44 return first;
45}
46
47// return a very temporary (and never deallocated) buffer. keep small.
48void *rxvt_temp_buf (int len);
49
21template<typename T> 50template<typename T>
22static inline void swap (T& a, T& b) { T t=a; a=b; b=t; } 51static inline T *
52rxvt_temp_buf (int len)
53{
54 return (T *)rxvt_temp_buf (len * sizeof (T));
55}
23 56
57// in range including end
24#define IN_RANGE(val,beg,end) \ 58#define IN_RANGE_INC(val,beg,end) \
25 ((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg)) 59 ((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg))
26 60
61// in range excluding end
62#define IN_RANGE_EXC(val,beg,end) \
63 ((unsigned int)(val) - (unsigned int)(beg) < (unsigned int)(end) - (unsigned int)(beg))
64
65// for m >= -n, ensure remainder lies between 0..n-1
66#define MOD(m,n) (((m) + (n)) % (n))
67
68// makes dynamically allocated objects zero-initialised
27struct zero_initialized { 69struct zero_initialized
70{
28 void *operator new (size_t s); 71 void *operator new (size_t s);
29 void operator delete (void *p, size_t s); 72 void operator delete (void *p, size_t s);
30}; 73};
31 74
32/* simplevec taken (and heavily modified), from: 75/* simplevec taken (and heavily modified), from:
33 * 76 *
34 * MICO --- a free CORBA implementation 77 * MICO --- a free CORBA implementation
35 * Copyright (C) 1997-98 Kay Roemer & Arno Puder 78 * Copyright (C) 1997-98 Kay Roemer & Arno Puder
36 */ 79 */
37template<class T> 80template<class T>
38struct simplevec { 81struct simplevec
82{
39 typedef T* iterator; 83 typedef T* iterator;
40 typedef const T* const_iterator; 84 typedef const T* const_iterator;
41 typedef unsigned long size_type; 85 typedef unsigned long size_type;
42 86
43private: 87private:
… …
241 return pos; 285 return pos;
242 } 286 }
243 void erase (iterator first, iterator last) 287 void erase (iterator first, iterator last)
244 { 288 {
245 if (last != first) { 289 if (last != first) {
246 memmove (first, last, (end ()-last)*sizeof (T)); 290 memmove (first, last, (end () - last) * sizeof (T));
247 _last -= last - first; 291 _last -= last - first;
248 } 292 }
249 } 293 }
250 void erase (iterator pos) 294 void erase (iterator pos)
251 { 295 {
252 if (pos != end ()) { 296 if (pos != end ()) {
253 memmove (pos, pos+1, (end ()- (pos+1))*sizeof (T)); 297 memmove (pos, pos+1, (end () - (pos+1)) * sizeof (T));
254 --_last; 298 --_last;
255 } 299 }
256 } 300 }
257 void swap (simplevec<T> &t) 301 void swap (simplevec<T> &t)
258 { 302 {
… …
284} 328}
285 329
286 330
287template<typename T> 331template<typename T>
288struct vector : simplevec<T> 332struct vector : simplevec<T>
289{ }; 333{
334};
335
336struct stringvec : simplevec<char *>
337{
338 ~stringvec ()
339 {
340 for (char **c = begin (); c != end (); c++)
341 free (*c);
342 }
343};
290 344
291#if 0 345#if 0
292template<typename T> 346template<typename T>
293struct rxvt_vec : simplevec<void *> { 347struct rxvt_vec : simplevec<void *>
348{
294 typedef T *iterator; 349 typedef T *iterator;
295 350
296 void push_back (T d) { simplevec<void *>::push_back ((void *)d); } 351 void push_back (T d) { simplevec<void *>::push_back ((void *)d); }
297 T pop_back () { return (T*)simplevec<void *>::pop_back (); } 352 T pop_back () { return (T*)simplevec<void *>::pop_back (); }
298 void erase (int i) { erase (begin () + i); } 353 void erase (int i) { erase (begin () + i); }
… …
302 T &operator [] (int i) { return * (T *) (& ((* (simplevec<void *> *)this)[i])); } 357 T &operator [] (int i) { return * (T *) (& ((* (simplevec<void *> *)this)[i])); }
303 const T &operator [] (int i) const { return * (const T *) (& ((* (const simplevec<void *> *)this)[i])); } 358 const T &operator [] (int i) const { return * (const T *) (& ((* (const simplevec<void *> *)this)[i])); }
304}; 359};
305#endif 360#endif
306 361
307template <typename I, typename T>
308I find (I first, I last, const T& value)
309{
310 while (first != last && *first != value)
311 ++first;
312
313 return first;
314}
315
316template<typename T> 362template<typename T>
317struct auto_ptr { 363struct auto_ptr
364{
318 T *p; 365 T *p;
319 366
320 auto_ptr () : p (0) { } 367 auto_ptr () : p (0) { }
321 auto_ptr (T *a) : p (a) { } 368 auto_ptr (T *a) : p (a) { }
322 369
… …
371 } 418 }
372}; 419};
373 420
374typedef auto_ptr<char> auto_str; 421typedef auto_ptr<char> auto_str;
375 422
376struct stringvec : simplevec<char *>
377{
378 ~stringvec ()
379 {
380 for (char **c = begin (); c != end (); c++)
381 delete [] *c;
382 }
383};
384
385#endif 423#endif
386 424

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