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/cvs/rxvt-unicode/src/rxvtutil.h
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Comparing rxvt-unicode/src/rxvtutil.h (file contents):
Revision 1.18 by root, Tue Jan 17 16:06:48 2006 UTC vs.
Revision 1.36 by ayin, Fri Dec 14 11:11:31 2007 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 <cstring> 5#include <cstring>
6
7using namespace std;
5 8
6#define PP_CONCAT_(a, b) a ## b 9#define PP_CONCAT_(a, b) a ## b
7#define PP_CONCAT(a, b) PP_CONCAT_(a, b) 10#define PP_CONCAT(a, b) PP_CONCAT_(a, b)
8#define PP_STRINGIFY_(a) #a 11#define PP_STRINGIFY_(a) #a
9#define PP_STRINGIFY(a) PP_STRINGIFY_(a) 12#define PP_STRINGIFY(a) PP_STRINGIFY_(a)
13
14#define HAVE_GCC_BUILTINS (__GNUC__ >= 4 || (__GNUC__ == 3 && __GNUC_MINOR__ == 4))
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
10 34
11extern class byteorder { 35extern class byteorder {
12 static unsigned int e; // at least 32 bits 36 static unsigned int e; // at least 32 bits
13public: 37public:
14 byteorder (); 38 byteorder ();
… …
28template<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; } 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; }
29template<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; } 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; }
30 54
31template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; } 55template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; }
32 56
57template<typename T> static inline T squared_diff (T a, T b) { return (a-b)*(a-b); }
58
59// linear interpolation
60template<typename T, typename U, typename P>
61static inline
62T lerp (T a, U b, P p)
63{
64 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}
75
76// return a very temporary (and never deallocated) buffer. keep small.
77void *rxvt_temp_buf (int len);
78
79template<typename T>
80static inline T *
81rxvt_temp_buf (int len)
82{
83 return (T *)rxvt_temp_buf (len * sizeof (T));
84}
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
33// in range including end 96// in range including end
34#define IN_RANGE_INC(val,beg,end) \ 97#define IN_RANGE_INC(val,beg,end) \
35 ((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg)) 98 ((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg))
36 99
37// in range excluding end 100// in range excluding end
38#define IN_RANGE_EXC(val,beg,end) \ 101#define IN_RANGE_EXC(val,beg,end) \
39 ((unsigned int)(val) - (unsigned int)(beg) < (unsigned int)(end) - (unsigned int)(beg)) 102 ((unsigned int)(val) - (unsigned int)(beg) < (unsigned int)(end) - (unsigned int)(beg))
103
104// for m >= -n, ensure remainder lies between 0..n-1
105#define MOD(m,n) (((m) + (n)) % (n))
40 106
41// makes dynamically allocated objects zero-initialised 107// makes dynamically allocated objects zero-initialised
42struct zero_initialized { 108struct zero_initialized {
43 void *operator new (size_t s); 109 void *operator new (size_t s);
44 void operator delete (void *p, size_t s); 110 void operator delete (void *p, size_t s);
45}; 111};
46 112
47/* simplevec taken (and heavily modified), from: 113/* simplevec taken (and heavily modified), from:
48 * 114 *
49 * MICO --- a free CORBA implementation 115 * MICO --- a free CORBA implementation
50 * Copyright (C) 1997-98 Kay Roemer & Arno Puder 116 * Copyright (C) 1997-98 Kay Roemer & Arno Puder
51 */ 117 */
52template<class T> 118template<class T>
53struct simplevec { 119struct simplevec {
… …
299} 365}
300 366
301 367
302template<typename T> 368template<typename T>
303struct vector : simplevec<T> 369struct vector : simplevec<T>
304{ }; 370{
371};
372
373struct stringvec : simplevec<char *>
374{
375 ~stringvec ()
376 {
377 for (char **c = begin (); c != end (); c++)
378 free (*c);
379 }
380};
305 381
306#if 0 382#if 0
307template<typename T> 383template<typename T>
308struct rxvt_vec : simplevec<void *> { 384struct rxvt_vec : simplevec<void *> {
309 typedef T *iterator; 385 typedef T *iterator;
… …
317 T &operator [] (int i) { return * (T *) (& ((* (simplevec<void *> *)this)[i])); } 393 T &operator [] (int i) { return * (T *) (& ((* (simplevec<void *> *)this)[i])); }
318 const T &operator [] (int i) const { return * (const T *) (& ((* (const simplevec<void *> *)this)[i])); } 394 const T &operator [] (int i) const { return * (const T *) (& ((* (const simplevec<void *> *)this)[i])); }
319}; 395};
320#endif 396#endif
321 397
322template <typename I, typename T>
323I find (I first, I last, const T& value)
324{
325 while (first != last && *first != value)
326 ++first;
327
328 return first;
329}
330
331template<typename T> 398template<typename T>
332struct auto_ptr { 399struct auto_ptr {
333 T *p; 400 T *p;
334 401
335 auto_ptr () : p (0) { } 402 auto_ptr () : p (0) { }
… …
386 } 453 }
387}; 454};
388 455
389typedef auto_ptr<char> auto_str; 456typedef auto_ptr<char> auto_str;
390 457
391struct stringvec : simplevec<char *>
392{
393 ~stringvec ()
394 {
395 for (char **c = begin (); c != end (); c++)
396 delete [] *c;
397 }
398};
399
400#endif 458#endif
401 459

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