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/cvs/rxvt-unicode/src/rxvtutil.h
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Comparing rxvt-unicode/src/rxvtutil.h (file contents):
Revision 1.22 by root, Sun Jan 29 22:27:04 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
14#define HAVE_GCC_BUILTINS 0 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
15 34
16extern class byteorder { 35extern class byteorder {
17 static unsigned int e; // at least 32 bits 36 static unsigned int e; // at least 32 bits
18public: 37public:
19 byteorder (); 38 byteorder ();
… …
33template<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; }
34template<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; }
35 54
36template<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; }
37 56
57template<typename T> static inline T squared_diff (T a, T b) { return (a-b)*(a-b); }
58
38// linear interpolation 59// linear interpolation
39template<typename T, typename U, typename P> 60template<typename T, typename U, typename P>
40static inline 61static inline
41T lerp (T a, U b, P p) 62T lerp (T a, U b, P p)
42{ 63{
43 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));
44} 84}
45 85
46// some bit functions, xft fuck me plenty 86// some bit functions, xft fuck me plenty
47#if HAVE_GCC_BUILTINS 87#if HAVE_GCC_BUILTINS
48static inline int ctz (unsigned int x) { return __builtin_ctz (x); } 88static inline int ctz (unsigned int x) { return __builtin_ctz (x); }
49static inline int popcount (unsigned int x) { return __builtin_popcount (x); } 89static inline int popcount (unsigned int x) { return __builtin_popcount (x); }
50#else 90#else
51// count trailing zero bits and count # of one bits 91// count trailing zero bits and count # of one bits
52int ctz (unsigned int x); 92int ctz (unsigned int x) CONST;
53int popcount (unsigned int x); 93int popcount (unsigned int x) CONST;
54#endif 94#endif
55 95
56// in range including end 96// in range including end
57#define IN_RANGE_INC(val,beg,end) \ 97#define IN_RANGE_INC(val,beg,end) \
58 ((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))
59 99
60// in range excluding end 100// in range excluding end
61#define IN_RANGE_EXC(val,beg,end) \ 101#define IN_RANGE_EXC(val,beg,end) \
62 ((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))
63 106
64// makes dynamically allocated objects zero-initialised 107// makes dynamically allocated objects zero-initialised
65struct zero_initialized { 108struct zero_initialized {
66 void *operator new (size_t s); 109 void *operator new (size_t s);
67 void operator delete (void *p, size_t s); 110 void operator delete (void *p, size_t s);
68}; 111};
69 112
70/* simplevec taken (and heavily modified), from: 113/* simplevec taken (and heavily modified), from:
71 * 114 *
72 * MICO --- a free CORBA implementation 115 * MICO --- a free CORBA implementation
73 * Copyright (C) 1997-98 Kay Roemer & Arno Puder 116 * Copyright (C) 1997-98 Kay Roemer & Arno Puder
74 */ 117 */
75template<class T> 118template<class T>
76struct simplevec { 119struct simplevec {
… …
322} 365}
323 366
324 367
325template<typename T> 368template<typename T>
326struct vector : simplevec<T> 369struct vector : simplevec<T>
327{ }; 370{
371};
372
373struct stringvec : simplevec<char *>
374{
375 ~stringvec ()
376 {
377 for (char **c = begin (); c != end (); c++)
378 free (*c);
379 }
380};
328 381
329#if 0 382#if 0
330template<typename T> 383template<typename T>
331struct rxvt_vec : simplevec<void *> { 384struct rxvt_vec : simplevec<void *> {
332 typedef T *iterator; 385 typedef T *iterator;
… …
340 T &operator [] (int i) { return * (T *) (& ((* (simplevec<void *> *)this)[i])); } 393 T &operator [] (int i) { return * (T *) (& ((* (simplevec<void *> *)this)[i])); }
341 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])); }
342}; 395};
343#endif 396#endif
344 397
345template <typename I, typename T>
346I find (I first, I last, const T& value)
347{
348 while (first != last && *first != value)
349 ++first;
350
351 return first;
352}
353
354template<typename T> 398template<typename T>
355struct auto_ptr { 399struct auto_ptr {
356 T *p; 400 T *p;
357 401
358 auto_ptr () : p (0) { } 402 auto_ptr () : p (0) { }
… …
409 } 453 }
410}; 454};
411 455
412typedef auto_ptr<char> auto_str; 456typedef auto_ptr<char> auto_str;
413 457
414struct stringvec : simplevec<char *>
415{
416 ~stringvec ()
417 {
418 for (char **c = begin (); c != end (); c++)
419 free (*c);
420 }
421};
422
423// return a very temporary (and never deallocated) buffer. keep small.
424void *rxvt_temp_buf (int len);
425
426template<typename T>
427inline T *
428rxvt_temp_buf (int len)
429{
430 return (T *)rxvt_temp_buf (len * sizeof (T));
431}
432
433#endif 458#endif
434 459

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