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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 1.38 by root, Wed Nov 5 14:43:54 2008 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# define expect(expr,value) __builtin_expect ((expr),(value))
19#else
20# define rxvt_attribute(x)
21# define expect(expr,value) (expr)
22#endif
23
24// put into ifs if you are very sure that the expression
25// is mostly true or mosty false. note that these return
26// booleans, not the expression.
27#define expect_false(expr) expect ((expr) != 0, 0)
28#define expect_true(expr) expect ((expr) != 0, 1)
29
30#define NORETURN rxvt_attribute ((noreturn))
31#define UNUSED rxvt_attribute ((unused))
32#define CONST rxvt_attribute ((const))
33
34// increases code size unless -fno-enforce-eh-specs
35#if __GNUC__
36# define NOTHROW
37# define THROW(x)
38#else
39# define NOTHROW throw()
40# define THROW(x) throw x
41#endif
10 42
11extern class byteorder { 43extern class byteorder {
12 static unsigned int e; // at least 32 bits 44 static unsigned int e; // at least 32 bits
13public: 45public:
14 byteorder (); 46 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; } 60template<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; } 61template<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 62
31template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; } 63template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; }
32 64
65template<typename T> static inline T squared_diff (T a, T b) { return (a-b)*(a-b); }
66
67// linear interpolation
68template<typename T, typename U, typename P>
69static inline
70T lerp (T a, U b, P p)
71{
72 return (long(a) * long(100 - p) + long(b) * long(p) + 50) / 100;
73}
74
75template <typename I, typename T>
76I find (I first, I last, const T& value)
77{
78 while (first != last && *first != value)
79 ++first;
80
81 return first;
82}
83
84// return a very temporary (and never deallocated) buffer. keep small.
85void *rxvt_temp_buf (int len);
86
87template<typename T>
88static inline T *
89rxvt_temp_buf (int len)
90{
91 return (T *)rxvt_temp_buf (len * sizeof (T));
92}
93
94// some bit functions, xft fuck me plenty
95#if HAVE_GCC_BUILTINS
96static inline int ctz (unsigned int x) { return __builtin_ctz (x); }
97static inline int popcount (unsigned int x) { return __builtin_popcount (x); }
98#else
99// count trailing zero bits and count # of one bits
100int ctz (unsigned int x) CONST;
101int popcount (unsigned int x) CONST;
102#endif
103
33// in range including end 104// in range including end
34#define IN_RANGE_INC(val,beg,end) \ 105#define IN_RANGE_INC(val,beg,end) \
35 ((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg)) 106 ((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg))
36 107
37// in range excluding end 108// in range excluding end
38#define IN_RANGE_EXC(val,beg,end) \ 109#define IN_RANGE_EXC(val,beg,end) \
39 ((unsigned int)(val) - (unsigned int)(beg) < (unsigned int)(end) - (unsigned int)(beg)) 110 ((unsigned int)(val) - (unsigned int)(beg) < (unsigned int)(end) - (unsigned int)(beg))
40 111
112// for m >= -n, ensure remainder lies between 0..n-1
113#define MOD(m,n) (((m) + (n)) % (n))
114
41// makes dynamically allocated objects zero-initialised 115// makes dynamically allocated objects zero-initialised
42struct zero_initialized { 116struct zero_initialized
117{
43 void *operator new (size_t s); 118 void *operator new (size_t s);
44 void operator delete (void *p, size_t s); 119 void operator delete (void *p, size_t s);
45}; 120};
46 121
47/* simplevec taken (and heavily modified), from: 122/* simplevec taken (and heavily modified), from:
48 * 123 *
49 * MICO --- a free CORBA implementation 124 * MICO --- a free CORBA implementation
50 * Copyright (C) 1997-98 Kay Roemer & Arno Puder 125 * Copyright (C) 1997-98 Kay Roemer & Arno Puder
51 */ 126 */
52template<class T> 127template<class T>
53struct simplevec { 128struct simplevec
129{
54 typedef T* iterator; 130 typedef T* iterator;
55 typedef const T* const_iterator; 131 typedef const T* const_iterator;
56 typedef unsigned long size_type; 132 typedef unsigned long size_type;
57 133
58private: 134private:
… …
299} 375}
300 376
301 377
302template<typename T> 378template<typename T>
303struct vector : simplevec<T> 379struct vector : simplevec<T>
304{ }; 380{
381};
382
383struct stringvec : simplevec<char *>
384{
385 ~stringvec ()
386 {
387 for (char **c = begin (); c != end (); c++)
388 free (*c);
389 }
390};
305 391
306#if 0 392#if 0
307template<typename T> 393template<typename T>
308struct rxvt_vec : simplevec<void *> { 394struct rxvt_vec : simplevec<void *>
395{
309 typedef T *iterator; 396 typedef T *iterator;
310 397
311 void push_back (T d) { simplevec<void *>::push_back ((void *)d); } 398 void push_back (T d) { simplevec<void *>::push_back ((void *)d); }
312 T pop_back () { return (T*)simplevec<void *>::pop_back (); } 399 T pop_back () { return (T*)simplevec<void *>::pop_back (); }
313 void erase (int i) { erase (begin () + i); } 400 void erase (int i) { erase (begin () + i); }
… …
317 T &operator [] (int i) { return * (T *) (& ((* (simplevec<void *> *)this)[i])); } 404 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])); } 405 const T &operator [] (int i) const { return * (const T *) (& ((* (const simplevec<void *> *)this)[i])); }
319}; 406};
320#endif 407#endif
321 408
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> 409template<typename T>
332struct auto_ptr { 410struct auto_ptr
411{
333 T *p; 412 T *p;
334 413
335 auto_ptr () : p (0) { } 414 auto_ptr () : p (0) { }
336 auto_ptr (T *a) : p (a) { } 415 auto_ptr (T *a) : p (a) { }
337 416
… …
386 } 465 }
387}; 466};
388 467
389typedef auto_ptr<char> auto_str; 468typedef auto_ptr<char> auto_str;
390 469
391struct stringvec : simplevec<char *>
392{
393 ~stringvec ()
394 {
395 for (char **c = begin (); c != end (); c++)
396 delete [] *c;
397 }
398};
399
400#endif 470#endif
401 471

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