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Comparing rxvt-unicode/src/rxvtutil.h (file contents):
Revision 1.12 by root, Wed Dec 21 10:34:24 2005 UTC vs.
Revision 1.44 by root, Mon Jan 3 18:52:41 2011 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#include <inttypes.h>
5 7
6extern class byteorder { 8using namespace std;
7 static unsigned int e; // at least 32 bits
8public:
9 byteorder ();
10 9
10#define ARRAY_LENGTH(v) (sizeof (v) / sizeof ((v)[0]))
11
12#define PP_CONCAT_(a, b) a ## b
13#define PP_CONCAT(a, b) PP_CONCAT_(a, b)
14#define PP_STRINGIFY_(a) #a
15#define PP_STRINGIFY(a) PP_STRINGIFY_(a)
16
17#define HAVE_GCC_BUILTINS (__GNUC__ >= 4 || (__GNUC__ == 3 && __GNUC_MINOR__ == 4))
18
19#if __GNUC__ >= 4
20# define rxvt_attribute(x) __attribute__(x)
21# define expect(expr,value) __builtin_expect ((expr),(value))
22#else
23# define rxvt_attribute(x)
24# define expect(expr,value) (expr)
25#endif
26
27// put into ifs if you are very sure that the expression
28// is mostly true or mostly false. note that these return
29// booleans, not the expression.
30#define expect_false(expr) expect ((expr) != 0, 0)
31#define expect_true(expr) expect ((expr) != 0, 1)
32
33#define NORETURN rxvt_attribute ((noreturn))
34#define UNUSED rxvt_attribute ((unused))
35#define CONST rxvt_attribute ((const))
36
37// increases code size unless -fno-enforce-eh-specs
38#if __GNUC__
39# define NOTHROW
40# define THROW(x)
41#else
42# define NOTHROW throw()
43# define THROW(x) throw x
44#endif
45
46namespace byteorder {
47 static unsigned char e ()
48 {
49 const uint32_t u = 0x11223344;
50 return *(unsigned char *)&u;
51 }
52
11 static bool big_endian () { return e == 0x11223344; }; 53 static bool big_endian () { return e () == 0x11; };
12 static bool network () { return e == 0x11223344; }; 54 static bool network () { return big_endian (); };
13 static bool little_endian () { return e == 0x44332211; }; 55 static bool little_endian () { return e () == 0x44; };
14 static bool vax () { return e == 0x44332211; }; 56 static bool vax () { return little_endian (); };
15} byteorder; 57};
16 58
17template<typename T, typename U> 59// various utility functions
18static inline T min (T a, U b) { return a < (T)b ? a : (T)b; } 60template<typename T, typename U> static inline T min (T a, U b) { return a < (T)b ? a : (T)b; }
19template<typename T, typename U> 61template<typename T, typename U> static inline void min_it (T &a, U b) { a = a < (T)b ? a : (T)b; }
20static inline T max (T a, U b) { return a > (T)b ? a : (T)b; } 62template<typename T, typename U> static inline T max (T a, U b) { return a > (T)b ? a : (T)b; }
63template<typename T, typename U> static inline void max_it (T &a, U b) { a = a > (T)b ? a : (T)b; }
64
65template<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; }
66template<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; }
67
68template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; }
69
70template<typename T> static inline T squared_diff (T a, T b) { return (a-b)*(a-b); }
71
72// linear interpolation
21template<typename T, typename U, typename V> 73template<typename T, typename U, typename P>
22static inline T clamp (T v, U a, V b) { return v < (T)a ? a : v >(T)b ? b : v; } 74static inline
75T lerp (T a, U b, P p)
76{
77 return (long(a) * long(100 - p) + long(b) * long(p) + 50) / 100;
78}
79
23template<typename T, typename U> 80template <typename I, typename T>
24static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; } 81I find (I first, I last, const T& value)
82{
83 while (first != last && *first != value)
84 ++first;
85
86 return first;
87}
88
89// return a very temporary (and never deallocated) buffer. keep small.
90void *rxvt_temp_buf (int len);
91
92template<typename T>
93static inline T *
94rxvt_temp_buf (int len)
95{
96 return (T *)rxvt_temp_buf (len * sizeof (T));
97}
98
99// some bit functions, xft fuck me plenty
100#if HAVE_GCC_BUILTINS
101/* netbsd stupidly defines popcount itself and puts it into string.h */
102static inline int rxvt_ctz (unsigned int x) { return __builtin_ctz (x); }
103static inline int rxvt_popcount (unsigned int x) { return __builtin_popcount (x); }
104#else
105// count trailing zero bits and count # of one bits
106int rxvt_ctz (unsigned int x) CONST;
107int rxvt_popcount (unsigned int x) CONST;
108#endif
25 109
26// in range including end 110// in range including end
27#define IN_RANGE_INC(val,beg,end) \ 111#define IN_RANGE_INC(val,beg,end) \
28 ((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg)) 112 ((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg))
29 113
30// in range excluding end 114// in range excluding end
31#define IN_RANGE_EXC(val,beg,end) \ 115#define IN_RANGE_EXC(val,beg,end) \
32 ((unsigned int)(val) - (unsigned int)(beg) < (unsigned int)(end) - (unsigned int)(beg)) 116 ((unsigned int)(val) - (unsigned int)(beg) < (unsigned int)(end) - (unsigned int)(beg))
33 117
118// for m >= -n, ensure remainder lies between 0..n-1
119#define MOD(m,n) (((m) + (n)) % (n))
120
121// makes dynamically allocated objects zero-initialised
34struct zero_initialized { 122struct zero_initialized
123{
35 void *operator new (size_t s); 124 void *operator new (size_t s);
36 void operator delete (void *p, size_t s); 125 void operator delete (void *p, size_t s);
37}; 126};
38 127
39/* simplevec taken (and heavily modified), from: 128/* simplevec taken (and heavily modified), from:
40 * 129 *
41 * MICO --- a free CORBA implementation 130 * MICO --- a free CORBA implementation
42 * Copyright (C) 1997-98 Kay Roemer & Arno Puder 131 * Copyright (C) 1997-98 Kay Roemer & Arno Puder
43 */ 132 */
44template<class T> 133template<class T>
45struct simplevec { 134struct simplevec
135{
46 typedef T* iterator; 136 typedef T* iterator;
47 typedef const T* const_iterator; 137 typedef const T* const_iterator;
48 typedef unsigned long size_type; 138 typedef unsigned long size_type;
49 139
50private: 140private:
… …
248 return pos; 338 return pos;
249 } 339 }
250 void erase (iterator first, iterator last) 340 void erase (iterator first, iterator last)
251 { 341 {
252 if (last != first) { 342 if (last != first) {
253 memmove (first, last, (end ()-last)*sizeof (T)); 343 memmove (first, last, (end () - last) * sizeof (T));
254 _last -= last - first; 344 _last -= last - first;
255 } 345 }
256 } 346 }
257 void erase (iterator pos) 347 void erase (iterator pos)
258 { 348 {
259 if (pos != end ()) { 349 if (pos != end ()) {
260 memmove (pos, pos+1, (end ()- (pos+1))*sizeof (T)); 350 memmove (pos, pos+1, (end () - (pos+1)) * sizeof (T));
261 --_last; 351 --_last;
262 } 352 }
263 } 353 }
264 void swap (simplevec<T> &t) 354 void swap (simplevec<T> &t)
265 { 355 {
… …
291} 381}
292 382
293 383
294template<typename T> 384template<typename T>
295struct vector : simplevec<T> 385struct vector : simplevec<T>
296{ }; 386{
387};
388
389struct stringvec : simplevec<char *>
390{
391 ~stringvec ()
392 {
393 for (char **c = begin (); c != end (); c++)
394 free (*c);
395 }
396};
297 397
298#if 0 398#if 0
299template<typename T> 399template<typename T>
300struct rxvt_vec : simplevec<void *> { 400struct rxvt_vec : simplevec<void *>
401{
301 typedef T *iterator; 402 typedef T *iterator;
302 403
303 void push_back (T d) { simplevec<void *>::push_back ((void *)d); } 404 void push_back (T d) { simplevec<void *>::push_back ((void *)d); }
304 T pop_back () { return (T*)simplevec<void *>::pop_back (); } 405 T pop_back () { return (T*)simplevec<void *>::pop_back (); }
305 void erase (int i) { erase (begin () + i); } 406 void erase (int i) { erase (begin () + i); }
… …
309 T &operator [] (int i) { return * (T *) (& ((* (simplevec<void *> *)this)[i])); } 410 T &operator [] (int i) { return * (T *) (& ((* (simplevec<void *> *)this)[i])); }
310 const T &operator [] (int i) const { return * (const T *) (& ((* (const simplevec<void *> *)this)[i])); } 411 const T &operator [] (int i) const { return * (const T *) (& ((* (const simplevec<void *> *)this)[i])); }
311}; 412};
312#endif 413#endif
313 414
314template <typename I, typename T>
315I find (I first, I last, const T& value)
316{
317 while (first != last && *first != value)
318 ++first;
319
320 return first;
321}
322
323template<typename T> 415template<typename T>
324struct auto_ptr { 416struct auto_ptr
417{
325 T *p; 418 T *p;
326 419
327 auto_ptr () : p (0) { } 420 auto_ptr () : p (0) { }
328 auto_ptr (T *a) : p (a) { } 421 auto_ptr (T *a) : p (a) { }
329 422
… …
378 } 471 }
379}; 472};
380 473
381typedef auto_ptr<char> auto_str; 474typedef auto_ptr<char> auto_str;
382 475
383struct stringvec : simplevec<char *>
384{
385 ~stringvec ()
386 {
387 for (char **c = begin (); c != end (); c++)
388 delete [] *c;
389 }
390};
391
392#endif 476#endif
393 477

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