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/cvs/rxvt-unicode/src/rxvtutil.h
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Comparing rxvt-unicode/src/rxvtutil.h (file contents):
Revision 1.11 by root, Tue Dec 20 19:30:59 2005 UTC vs.
Revision 1.47 by sf-exg, Thu Jan 19 13:33:43 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 { 8using namespace std;
7 static unsigned int e; // at least 32 bits
8public:
9 byteorder ();
10 9
11 static bool big_endian () { return e == 0x11223344; }; 10// increases code size unless -fno-enforce-eh-specs
12 static bool network () { return e == 0x11223344; }; 11#if __GNUC__
13 static bool little_endian () { return e == 0x44332211; }; 12# define NOTHROW
14 static bool vax () { return e == 0x44332211; }; 13# define THROW(x)
15} byteorder; 14#else
15# define NOTHROW throw()
16# define THROW(x) throw x
17#endif
16 18
19// various utility functions
20template<typename T, typename U> static inline T min (T a, U b) { return a < (T)b ? a : (T)b; }
21template<typename T, typename U> static inline void min_it (T &a, U b) { a = a < (T)b ? a : (T)b; }
22template<typename T, typename U> static inline T max (T a, U b) { return a > (T)b ? a : (T)b; }
23template<typename T, typename U> static inline void max_it (T &a, U b) { a = a > (T)b ? a : (T)b; }
24
25template<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; }
26template<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; }
27
28template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; }
29
30template<typename T> static inline T squared_diff (T a, T b) { return (a-b)*(a-b); }
31
32// linear interpolation
33template<typename T, typename U, typename P>
34static inline
35T lerp (T a, U b, P p)
36{
37 return (long(a) * long(100 - p) + long(b) * long(p) + 50) / 100;
38}
39
17template<typename T, typename U> 40template <typename I, typename T>
18static inline T min (T a, U b) { return a < (T)b ? a : (T)b; } 41I find (I first, I last, const T& value)
19template<typename T, typename U> 42{
20static inline T max (T a, U b) { return a > (T)b ? a : (T)b; } 43 while (first != last && *first != value)
44 ++first;
45
46 return first;
47}
48
49// return a very temporary (and never deallocated) buffer. keep small.
50void *rxvt_temp_buf (int len);
51
21template<typename T> 52template<typename T>
22static inline void swap (T& a, T& b) { T t=a; a=b; b=t; } 53static inline T *
54rxvt_temp_buf (int len)
55{
56 return (T *)rxvt_temp_buf (len * sizeof (T));
57}
23 58
24// in range including end 59// in range including end
25#define IN_RANGE_INC(val,beg,end) \ 60#define IN_RANGE_INC(val,beg,end) \
26 ((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg)) 61 ((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg))
27 62
28// in range excluding end 63// in range excluding end
29#define IN_RANGE_EXC(val,beg,end) \ 64#define IN_RANGE_EXC(val,beg,end) \
30 ((unsigned int)(val) - (unsigned int)(beg) < (unsigned int)(end) - (unsigned int)(beg)) 65 ((unsigned int)(val) - (unsigned int)(beg) < (unsigned int)(end) - (unsigned int)(beg))
31 66
67// for m >= -n, ensure remainder lies between 0..n-1
68#define MOD(m,n) (((m) + (n)) % (n))
69
70// makes dynamically allocated objects zero-initialised
32struct zero_initialized { 71struct zero_initialized
72{
33 void *operator new (size_t s); 73 void *operator new (size_t s);
34 void operator delete (void *p, size_t s); 74 void operator delete (void *p, size_t s);
35}; 75};
36 76
37/* simplevec taken (and heavily modified), from: 77/* simplevec taken (and heavily modified), from:
38 * 78 *
39 * MICO --- a free CORBA implementation 79 * MICO --- a free CORBA implementation
40 * Copyright (C) 1997-98 Kay Roemer & Arno Puder 80 * Copyright (C) 1997-98 Kay Roemer & Arno Puder
41 */ 81 */
42template<class T> 82template<class T>
43struct simplevec { 83struct simplevec
84{
44 typedef T* iterator; 85 typedef T* iterator;
45 typedef const T* const_iterator; 86 typedef const T* const_iterator;
46 typedef unsigned long size_type; 87 typedef unsigned long size_type;
47 88
48private: 89private:
… …
246 return pos; 287 return pos;
247 } 288 }
248 void erase (iterator first, iterator last) 289 void erase (iterator first, iterator last)
249 { 290 {
250 if (last != first) { 291 if (last != first) {
251 memmove (first, last, (end ()-last)*sizeof (T)); 292 memmove (first, last, (end () - last) * sizeof (T));
252 _last -= last - first; 293 _last -= last - first;
253 } 294 }
254 } 295 }
255 void erase (iterator pos) 296 void erase (iterator pos)
256 { 297 {
257 if (pos != end ()) { 298 if (pos != end ()) {
258 memmove (pos, pos+1, (end ()- (pos+1))*sizeof (T)); 299 memmove (pos, pos+1, (end () - (pos+1)) * sizeof (T));
259 --_last; 300 --_last;
260 } 301 }
261 } 302 }
262 void swap (simplevec<T> &t) 303 void swap (simplevec<T> &t)
263 { 304 {
… …
289} 330}
290 331
291 332
292template<typename T> 333template<typename T>
293struct vector : simplevec<T> 334struct vector : simplevec<T>
294{ }; 335{
336};
337
338struct stringvec : simplevec<char *>
339{
340 ~stringvec ()
341 {
342 for (char **c = begin (); c != end (); c++)
343 free (*c);
344 }
345};
295 346
296#if 0 347#if 0
297template<typename T> 348template<typename T>
298struct rxvt_vec : simplevec<void *> { 349struct rxvt_vec : simplevec<void *>
350{
299 typedef T *iterator; 351 typedef T *iterator;
300 352
301 void push_back (T d) { simplevec<void *>::push_back ((void *)d); } 353 void push_back (T d) { simplevec<void *>::push_back ((void *)d); }
302 T pop_back () { return (T*)simplevec<void *>::pop_back (); } 354 T pop_back () { return (T*)simplevec<void *>::pop_back (); }
303 void erase (int i) { erase (begin () + i); } 355 void erase (int i) { erase (begin () + i); }
… …
307 T &operator [] (int i) { return * (T *) (& ((* (simplevec<void *> *)this)[i])); } 359 T &operator [] (int i) { return * (T *) (& ((* (simplevec<void *> *)this)[i])); }
308 const T &operator [] (int i) const { return * (const T *) (& ((* (const simplevec<void *> *)this)[i])); } 360 const T &operator [] (int i) const { return * (const T *) (& ((* (const simplevec<void *> *)this)[i])); }
309}; 361};
310#endif 362#endif
311 363
312template <typename I, typename T>
313I find (I first, I last, const T& value)
314{
315 while (first != last && *first != value)
316 ++first;
317
318 return first;
319}
320
321template<typename T> 364template<typename T>
322struct auto_ptr { 365struct auto_ptr
366{
323 T *p; 367 T *p;
324 368
325 auto_ptr () : p (0) { } 369 auto_ptr () : p (0) { }
326 auto_ptr (T *a) : p (a) { } 370 auto_ptr (T *a) : p (a) { }
327 371
… …
376 } 420 }
377}; 421};
378 422
379typedef auto_ptr<char> auto_str; 423typedef auto_ptr<char> auto_str;
380 424
381struct stringvec : simplevec<char *>
382{
383 ~stringvec ()
384 {
385 for (char **c = begin (); c != end (); c++)
386 delete [] *c;
387 }
388};
389
390#endif 425#endif
391 426

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