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/cvs/rxvt-unicode/src/rxvtutil.h
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Comparing rxvt-unicode/src/rxvtutil.h (file contents):
Revision 1.21 by root, Sun Jan 29 20:51:28 2006 UTC vs.
Revision 1.41 by sf-exg, Sat Dec 18 18:17:39 2010 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;
8
9#define ARRAY_LENGTH(v) (sizeof (v) / sizeof ((v)[0]))
6 10
7#define PP_CONCAT_(a, b) a ## b 11#define PP_CONCAT_(a, b) a ## b
8#define PP_CONCAT(a, b) PP_CONCAT_(a, b) 12#define PP_CONCAT(a, b) PP_CONCAT_(a, b)
9#define PP_STRINGIFY_(a) #a 13#define PP_STRINGIFY_(a) #a
10#define PP_STRINGIFY(a) PP_STRINGIFY_(a) 14#define PP_STRINGIFY(a) PP_STRINGIFY_(a)
15
16#define HAVE_GCC_BUILTINS (__GNUC__ >= 4 || (__GNUC__ == 3 && __GNUC_MINOR__ == 4))
17
18#if __GNUC__ >= 4
19# define rxvt_attribute(x) __attribute__(x)
20# define expect(expr,value) __builtin_expect ((expr),(value))
21#else
22# define rxvt_attribute(x)
23# define expect(expr,value) (expr)
24#endif
25
26// put into ifs if you are very sure that the expression
27// is mostly true or mostly false. note that these return
28// booleans, not the expression.
29#define expect_false(expr) expect ((expr) != 0, 0)
30#define expect_true(expr) expect ((expr) != 0, 1)
31
32#define NORETURN rxvt_attribute ((noreturn))
33#define UNUSED rxvt_attribute ((unused))
34#define CONST rxvt_attribute ((const))
35
36// increases code size unless -fno-enforce-eh-specs
37#if __GNUC__
38# define NOTHROW
39# define THROW(x)
40#else
41# define NOTHROW throw()
42# define THROW(x) throw x
43#endif
11 44
12extern class byteorder { 45extern class byteorder {
13 static unsigned int e; // at least 32 bits 46 static unsigned int e; // at least 32 bits
14public: 47public:
15 byteorder (); 48 byteorder ();
… …
29template<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; } 62template<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; }
30template<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; } 63template<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; }
31 64
32template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; } 65template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; }
33 66
67template<typename T> static inline T squared_diff (T a, T b) { return (a-b)*(a-b); }
68
34// linear interpolation 69// linear interpolation
35template<typename T, typename U, typename P> 70template<typename T, typename U, typename P>
36static inline 71static inline
37T lerp (T a, U b, P p) 72T lerp (T a, U b, P p)
38{ 73{
39 return (int(a) * int(p) + int(b) * int(100 - p)) / 100; 74 return (long(a) * long(100 - p) + long(b) * long(p) + 50) / 100;
40} 75}
76
77template <typename I, typename T>
78I find (I first, I last, const T& value)
79{
80 while (first != last && *first != value)
81 ++first;
82
83 return first;
84}
85
86// return a very temporary (and never deallocated) buffer. keep small.
87void *rxvt_temp_buf (int len);
88
89template<typename T>
90static inline T *
91rxvt_temp_buf (int len)
92{
93 return (T *)rxvt_temp_buf (len * sizeof (T));
94}
95
96// some bit functions, xft fuck me plenty
97#if HAVE_GCC_BUILTINS
98/* netbsd stupidly defines popcount itself and puts it into string.h */
99static inline int rxvt_ctz (unsigned int x) { return __builtin_ctz (x); }
100static inline int rxvt_popcount (unsigned int x) { return __builtin_popcount (x); }
101#else
102// count trailing zero bits and count # of one bits
103int rxvt_ctz (unsigned int x) CONST;
104int rxvt_popcount (unsigned int x) CONST;
105#endif
41 106
42// in range including end 107// in range including end
43#define IN_RANGE_INC(val,beg,end) \ 108#define IN_RANGE_INC(val,beg,end) \
44 ((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg)) 109 ((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg))
45 110
46// in range excluding end 111// in range excluding end
47#define IN_RANGE_EXC(val,beg,end) \ 112#define IN_RANGE_EXC(val,beg,end) \
48 ((unsigned int)(val) - (unsigned int)(beg) < (unsigned int)(end) - (unsigned int)(beg)) 113 ((unsigned int)(val) - (unsigned int)(beg) < (unsigned int)(end) - (unsigned int)(beg))
49 114
115// for m >= -n, ensure remainder lies between 0..n-1
116#define MOD(m,n) (((m) + (n)) % (n))
117
50// makes dynamically allocated objects zero-initialised 118// makes dynamically allocated objects zero-initialised
51struct zero_initialized { 119struct zero_initialized
120{
52 void *operator new (size_t s); 121 void *operator new (size_t s);
53 void operator delete (void *p, size_t s); 122 void operator delete (void *p, size_t s);
54}; 123};
55 124
56/* simplevec taken (and heavily modified), from: 125/* simplevec taken (and heavily modified), from:
57 * 126 *
58 * MICO --- a free CORBA implementation 127 * MICO --- a free CORBA implementation
59 * Copyright (C) 1997-98 Kay Roemer & Arno Puder 128 * Copyright (C) 1997-98 Kay Roemer & Arno Puder
60 */ 129 */
61template<class T> 130template<class T>
62struct simplevec { 131struct simplevec
132{
63 typedef T* iterator; 133 typedef T* iterator;
64 typedef const T* const_iterator; 134 typedef const T* const_iterator;
65 typedef unsigned long size_type; 135 typedef unsigned long size_type;
66 136
67private: 137private:
… …
308} 378}
309 379
310 380
311template<typename T> 381template<typename T>
312struct vector : simplevec<T> 382struct vector : simplevec<T>
313{ }; 383{
384};
385
386struct stringvec : simplevec<char *>
387{
388 ~stringvec ()
389 {
390 for (char **c = begin (); c != end (); c++)
391 free (*c);
392 }
393};
314 394
315#if 0 395#if 0
316template<typename T> 396template<typename T>
317struct rxvt_vec : simplevec<void *> { 397struct rxvt_vec : simplevec<void *>
398{
318 typedef T *iterator; 399 typedef T *iterator;
319 400
320 void push_back (T d) { simplevec<void *>::push_back ((void *)d); } 401 void push_back (T d) { simplevec<void *>::push_back ((void *)d); }
321 T pop_back () { return (T*)simplevec<void *>::pop_back (); } 402 T pop_back () { return (T*)simplevec<void *>::pop_back (); }
322 void erase (int i) { erase (begin () + i); } 403 void erase (int i) { erase (begin () + i); }
… …
326 T &operator [] (int i) { return * (T *) (& ((* (simplevec<void *> *)this)[i])); } 407 T &operator [] (int i) { return * (T *) (& ((* (simplevec<void *> *)this)[i])); }
327 const T &operator [] (int i) const { return * (const T *) (& ((* (const simplevec<void *> *)this)[i])); } 408 const T &operator [] (int i) const { return * (const T *) (& ((* (const simplevec<void *> *)this)[i])); }
328}; 409};
329#endif 410#endif
330 411
331template <typename I, typename T>
332I find (I first, I last, const T& value)
333{
334 while (first != last && *first != value)
335 ++first;
336
337 return first;
338}
339
340template<typename T> 412template<typename T>
341struct auto_ptr { 413struct auto_ptr
414{
342 T *p; 415 T *p;
343 416
344 auto_ptr () : p (0) { } 417 auto_ptr () : p (0) { }
345 auto_ptr (T *a) : p (a) { } 418 auto_ptr (T *a) : p (a) { }
346 419
… …
395 } 468 }
396}; 469};
397 470
398typedef auto_ptr<char> auto_str; 471typedef auto_ptr<char> auto_str;
399 472
400struct stringvec : simplevec<char *>
401{
402 ~stringvec ()
403 {
404 for (char **c = begin (); c != end (); c++)
405 free (*c);
406 }
407};
408
409// return a very temporary (and never deallocated) buffer. keep small.
410void *rxvt_temp_buf (int len);
411
412template<typename T>
413inline T *
414rxvt_temp_buf (int len)
415{
416 return (T *)rxvt_temp_buf (len * sizeof (T));
417}
418
419#endif 473#endif
420 474

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