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/cvs/rxvt-unicode/src/rxvtutil.h
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Comparing rxvt-unicode/src/rxvtutil.h (file contents):
Revision 1.13 by root, Wed Dec 21 14:19:19 2005 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 <cstring> 5#include <cstring>
6
7using namespace std;
8
9#define ARRAY_LENGTH(v) (sizeof (v) / sizeof ((v)[0]))
10
11#define PP_CONCAT_(a, b) a ## b
12#define PP_CONCAT(a, b) PP_CONCAT_(a, b)
13#define PP_STRINGIFY_(a) #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
5 44
6extern class byteorder { 45extern class byteorder {
7 static unsigned int e; // at least 32 bits 46 static unsigned int e; // at least 32 bits
8public: 47public:
9 byteorder (); 48 byteorder ();
… …
12 static bool network () { return e == 0x11223344; }; 51 static bool network () { return e == 0x11223344; };
13 static bool little_endian () { return e == 0x44332211; }; 52 static bool little_endian () { return e == 0x44332211; };
14 static bool vax () { return e == 0x44332211; }; 53 static bool vax () { return e == 0x44332211; };
15} byteorder; 54} byteorder;
16 55
56// various utility functions
17template<typename T, typename U> static inline T min (T a, U b) { return a < (T)b ? a : (T)b; } 57template<typename T, typename U> static inline T min (T a, U b) { return a < (T)b ? a : (T)b; }
18template<typename T, typename U> static inline void min_it (T &a, U b) { a = a < (T)b ? a : (T)b; } 58template<typename T, typename U> static inline void min_it (T &a, U b) { a = a < (T)b ? a : (T)b; }
19template<typename T, typename U> static inline T max (T a, U b) { return a > (T)b ? a : (T)b; } 59template<typename T, typename U> static inline T max (T a, U b) { return a > (T)b ? a : (T)b; }
20template<typename T, typename U> static inline void max_it (T &a, U b) { a = a > (T)b ? a : (T)b; } 60template<typename T, typename U> static inline void max_it (T &a, U b) { a = a > (T)b ? a : (T)b; }
21 61
22template<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; }
23template<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; }
24 64
65template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; }
66
67template<typename T> static inline T squared_diff (T a, T b) { return (a-b)*(a-b); }
68
69// linear interpolation
70template<typename T, typename U, typename P>
71static inline
72T lerp (T a, U b, P p)
73{
74 return (long(a) * long(100 - p) + long(b) * long(p) + 50) / 100;
75}
76
25template<typename T, typename U> 77template <typename I, typename T>
26static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)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
27 106
28// in range including end 107// in range including end
29#define IN_RANGE_INC(val,beg,end) \ 108#define IN_RANGE_INC(val,beg,end) \
30 ((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))
31 110
32// in range excluding end 111// in range excluding end
33#define IN_RANGE_EXC(val,beg,end) \ 112#define IN_RANGE_EXC(val,beg,end) \
34 ((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))
35 114
115// for m >= -n, ensure remainder lies between 0..n-1
116#define MOD(m,n) (((m) + (n)) % (n))
117
118// makes dynamically allocated objects zero-initialised
36struct zero_initialized { 119struct zero_initialized
120{
37 void *operator new (size_t s); 121 void *operator new (size_t s);
38 void operator delete (void *p, size_t s); 122 void operator delete (void *p, size_t s);
39}; 123};
40 124
41/* simplevec taken (and heavily modified), from: 125/* simplevec taken (and heavily modified), from:
42 * 126 *
43 * MICO --- a free CORBA implementation 127 * MICO --- a free CORBA implementation
44 * Copyright (C) 1997-98 Kay Roemer & Arno Puder 128 * Copyright (C) 1997-98 Kay Roemer & Arno Puder
45 */ 129 */
46template<class T> 130template<class T>
47struct simplevec { 131struct simplevec
132{
48 typedef T* iterator; 133 typedef T* iterator;
49 typedef const T* const_iterator; 134 typedef const T* const_iterator;
50 typedef unsigned long size_type; 135 typedef unsigned long size_type;
51 136
52private: 137private:
… …
250 return pos; 335 return pos;
251 } 336 }
252 void erase (iterator first, iterator last) 337 void erase (iterator first, iterator last)
253 { 338 {
254 if (last != first) { 339 if (last != first) {
255 memmove (first, last, (end ()-last)*sizeof (T)); 340 memmove (first, last, (end () - last) * sizeof (T));
256 _last -= last - first; 341 _last -= last - first;
257 } 342 }
258 } 343 }
259 void erase (iterator pos) 344 void erase (iterator pos)
260 { 345 {
261 if (pos != end ()) { 346 if (pos != end ()) {
262 memmove (pos, pos+1, (end ()- (pos+1))*sizeof (T)); 347 memmove (pos, pos+1, (end () - (pos+1)) * sizeof (T));
263 --_last; 348 --_last;
264 } 349 }
265 } 350 }
266 void swap (simplevec<T> &t) 351 void swap (simplevec<T> &t)
267 { 352 {
… …
293} 378}
294 379
295 380
296template<typename T> 381template<typename T>
297struct vector : simplevec<T> 382struct vector : simplevec<T>
298{ }; 383{
384};
385
386struct stringvec : simplevec<char *>
387{
388 ~stringvec ()
389 {
390 for (char **c = begin (); c != end (); c++)
391 free (*c);
392 }
393};
299 394
300#if 0 395#if 0
301template<typename T> 396template<typename T>
302struct rxvt_vec : simplevec<void *> { 397struct rxvt_vec : simplevec<void *>
398{
303 typedef T *iterator; 399 typedef T *iterator;
304 400
305 void push_back (T d) { simplevec<void *>::push_back ((void *)d); } 401 void push_back (T d) { simplevec<void *>::push_back ((void *)d); }
306 T pop_back () { return (T*)simplevec<void *>::pop_back (); } 402 T pop_back () { return (T*)simplevec<void *>::pop_back (); }
307 void erase (int i) { erase (begin () + i); } 403 void erase (int i) { erase (begin () + i); }
… …
311 T &operator [] (int i) { return * (T *) (& ((* (simplevec<void *> *)this)[i])); } 407 T &operator [] (int i) { return * (T *) (& ((* (simplevec<void *> *)this)[i])); }
312 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])); }
313}; 409};
314#endif 410#endif
315 411
316template <typename I, typename T>
317I find (I first, I last, const T& value)
318{
319 while (first != last && *first != value)
320 ++first;
321
322 return first;
323}
324
325template<typename T> 412template<typename T>
326struct auto_ptr { 413struct auto_ptr
414{
327 T *p; 415 T *p;
328 416
329 auto_ptr () : p (0) { } 417 auto_ptr () : p (0) { }
330 auto_ptr (T *a) : p (a) { } 418 auto_ptr (T *a) : p (a) { }
331 419
… …
380 } 468 }
381}; 469};
382 470
383typedef auto_ptr<char> auto_str; 471typedef auto_ptr<char> auto_str;
384 472
385struct stringvec : simplevec<char *>
386{
387 ~stringvec ()
388 {
389 for (char **c = begin (); c != end (); c++)
390 delete [] *c;
391 }
392};
393
394#endif 473#endif
395 474

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