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/cvs/rxvt-unicode/src/rxvtutil.h
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Comparing rxvt-unicode/src/rxvtutil.h (file contents):
Revision 1.23 by root, Sun Jan 29 22:30:21 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 <cstdlib>
5#include <cstring> 5#include <cstring>
6
7using namespace std;
6 8
7#define PP_CONCAT_(a, b) a ## b 9#define PP_CONCAT_(a, b) a ## b
8#define PP_CONCAT(a, b) PP_CONCAT_(a, b) 10#define PP_CONCAT(a, b) PP_CONCAT_(a, b)
9#define PP_STRINGIFY_(a) #a 11#define PP_STRINGIFY_(a) #a
10#define PP_STRINGIFY(a) PP_STRINGIFY_(a) 12#define PP_STRINGIFY(a) PP_STRINGIFY_(a)
11 13
12// actually, some gcc-3.x versions work, too 14#define HAVE_GCC_BUILTINS (__GNUC__ >= 4 || (__GNUC__ == 3 && __GNUC_MINOR__ == 4))
13#define HAVE_GCC_BUILTINS (__GNUC__ >= 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
14 34
15extern class byteorder { 35extern class byteorder {
16 static unsigned int e; // at least 32 bits 36 static unsigned int e; // at least 32 bits
17public: 37public:
18 byteorder (); 38 byteorder ();
… …
32template<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; }
33template<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; }
34 54
35template<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; }
36 56
57template<typename T> static inline T squared_diff (T a, T b) { return (a-b)*(a-b); }
58
37// linear interpolation 59// linear interpolation
38template<typename T, typename U, typename P> 60template<typename T, typename U, typename P>
39static inline 61static inline
40T lerp (T a, U b, P p) 62T lerp (T a, U b, P p)
41{ 63{
42 return (int(a) * int(p) + int(b) * int(100 - p)) / 100; 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));
43} 84}
44 85
45// some bit functions, xft fuck me plenty 86// some bit functions, xft fuck me plenty
46#if HAVE_GCC_BUILTINS 87#if HAVE_GCC_BUILTINS
47static inline int ctz (unsigned int x) { return __builtin_ctz (x); } 88static inline int ctz (unsigned int x) { return __builtin_ctz (x); }
48static inline int popcount (unsigned int x) { return __builtin_popcount (x); } 89static inline int popcount (unsigned int x) { return __builtin_popcount (x); }
49#else 90#else
50// count trailing zero bits and count # of one bits 91// count trailing zero bits and count # of one bits
51int ctz (unsigned int x); 92int ctz (unsigned int x) CONST;
52int popcount (unsigned int x); 93int popcount (unsigned int x) CONST;
53#endif 94#endif
54 95
55// in range including end 96// in range including end
56#define IN_RANGE_INC(val,beg,end) \ 97#define IN_RANGE_INC(val,beg,end) \
57 ((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))
58 99
59// in range excluding end 100// in range excluding end
60#define IN_RANGE_EXC(val,beg,end) \ 101#define IN_RANGE_EXC(val,beg,end) \
61 ((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))
62 106
63// makes dynamically allocated objects zero-initialised 107// makes dynamically allocated objects zero-initialised
64struct zero_initialized { 108struct zero_initialized {
65 void *operator new (size_t s); 109 void *operator new (size_t s);
66 void operator delete (void *p, size_t s); 110 void operator delete (void *p, size_t s);
67}; 111};
68 112
69/* simplevec taken (and heavily modified), from: 113/* simplevec taken (and heavily modified), from:
70 * 114 *
71 * MICO --- a free CORBA implementation 115 * MICO --- a free CORBA implementation
72 * Copyright (C) 1997-98 Kay Roemer & Arno Puder 116 * Copyright (C) 1997-98 Kay Roemer & Arno Puder
73 */ 117 */
74template<class T> 118template<class T>
75struct simplevec { 119struct simplevec {
… …
321} 365}
322 366
323 367
324template<typename T> 368template<typename T>
325struct vector : simplevec<T> 369struct vector : simplevec<T>
326{ }; 370{
371};
372
373struct stringvec : simplevec<char *>
374{
375 ~stringvec ()
376 {
377 for (char **c = begin (); c != end (); c++)
378 free (*c);
379 }
380};
327 381
328#if 0 382#if 0
329template<typename T> 383template<typename T>
330struct rxvt_vec : simplevec<void *> { 384struct rxvt_vec : simplevec<void *> {
331 typedef T *iterator; 385 typedef T *iterator;
… …
339 T &operator [] (int i) { return * (T *) (& ((* (simplevec<void *> *)this)[i])); } 393 T &operator [] (int i) { return * (T *) (& ((* (simplevec<void *> *)this)[i])); }
340 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])); }
341}; 395};
342#endif 396#endif
343 397
344template <typename I, typename T>
345I find (I first, I last, const T& value)
346{
347 while (first != last && *first != value)
348 ++first;
349
350 return first;
351}
352
353template<typename T> 398template<typename T>
354struct auto_ptr { 399struct auto_ptr {
355 T *p; 400 T *p;
356 401
357 auto_ptr () : p (0) { } 402 auto_ptr () : p (0) { }
… …
408 } 453 }
409}; 454};
410 455
411typedef auto_ptr<char> auto_str; 456typedef auto_ptr<char> auto_str;
412 457
413struct stringvec : simplevec<char *>
414{
415 ~stringvec ()
416 {
417 for (char **c = begin (); c != end (); c++)
418 free (*c);
419 }
420};
421
422// return a very temporary (and never deallocated) buffer. keep small.
423void *rxvt_temp_buf (int len);
424
425template<typename T>
426inline T *
427rxvt_temp_buf (int len)
428{
429 return (T *)rxvt_temp_buf (len * sizeof (T));
430}
431
432#endif 458#endif
433 459

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