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/cvs/rxvt-unicode/src/rxvtutil.h
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Comparing rxvt-unicode/src/rxvtutil.h (file contents):
Revision 1.9 by root, Sun Jun 26 19:59:29 2005 UTC vs.
Revision 1.31 by root, Thu Nov 22 15:32:39 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 <cstring> 5#include <cstring>
6
7using namespace std;
8
9#define PP_CONCAT_(a, b) a ## b
10#define PP_CONCAT(a, b) PP_CONCAT_(a, b)
11#define PP_STRINGIFY_(a) #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#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
5 34
6extern class byteorder { 35extern class byteorder {
7 static unsigned int e; // at least 32 bits 36 static unsigned int e; // at least 32 bits
8public: 37public:
9 byteorder (); 38 byteorder ();
… …
12 static bool network () { return e == 0x11223344; }; 41 static bool network () { return e == 0x11223344; };
13 static bool little_endian () { return e == 0x44332211; }; 42 static bool little_endian () { return e == 0x44332211; };
14 static bool vax () { return e == 0x44332211; }; 43 static bool vax () { return e == 0x44332211; };
15} byteorder; 44} byteorder;
16 45
46// various utility functions
47template<typename T, typename U> static inline T min (T a, U b) { return a < (T)b ? a : (T)b; }
48template<typename T, typename U> static inline void min_it (T &a, U b) { a = a < (T)b ? a : (T)b; }
49template<typename T, typename U> static inline T max (T a, U b) { return a > (T)b ? a : (T)b; }
50template<typename T, typename U> static inline void max_it (T &a, U b) { a = a > (T)b ? a : (T)b; }
51
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; }
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; }
54
55template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; }
56
57template<typename T> static inline T squared_diff (T a, T b) { return (a-b)*(a-b); }
58
59// linear interpolation
17template<typename T, typename U> 60template<typename T, typename U, typename P>
18static inline T min (T a, U b) { return a < b ? a : (T)b; } 61static inline
19template<typename T, typename U> 62T lerp (T a, U b, P p)
20static inline T max (T a, U b) { return a > b ? a : (T)b; } 63{
21template<typename T> 64 return (long(a) * long(100 - p) + long(b) * long(p) + 50) / 100;
22static inline void swap (T& a, T& b) { T t=a; a=b; b=t; } 65}
23 66
67// some bit functions, xft fuck me plenty
68#if HAVE_GCC_BUILTINS
69static inline int ctz (unsigned int x) { return __builtin_ctz (x); }
70static inline int popcount (unsigned int x) { return __builtin_popcount (x); }
71#else
72// count trailing zero bits and count # of one bits
73int ctz (unsigned int x) CONST;
74int popcount (unsigned int x) CONST;
75#endif
76
77// in range including end
24#define IN_RANGE(val,beg,end) \ 78#define IN_RANGE_INC(val,beg,end) \
25 ((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg)) 79 ((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg))
26 80
81// in range excluding end
82#define IN_RANGE_EXC(val,beg,end) \
83 ((unsigned int)(val) - (unsigned int)(beg) < (unsigned int)(end) - (unsigned int)(beg))
84
85// makes dynamically allocated objects zero-initialised
27struct zero_initialized { 86struct zero_initialized {
28 void *operator new (size_t s); 87 void *operator new (size_t s);
29 void operator delete (void *p, size_t s); 88 void operator delete (void *p, size_t s);
30}; 89};
31 90
32/* simplevec taken (and heavily modified), from: 91/* simplevec taken (and heavily modified), from:
33 * 92 *
34 * MICO --- a free CORBA implementation 93 * MICO --- a free CORBA implementation
35 * Copyright (C) 1997-98 Kay Roemer & Arno Puder 94 * Copyright (C) 1997-98 Kay Roemer & Arno Puder
36 */ 95 */
37template<class T> 96template<class T>
38struct simplevec { 97struct simplevec {
… …
241 return pos; 300 return pos;
242 } 301 }
243 void erase (iterator first, iterator last) 302 void erase (iterator first, iterator last)
244 { 303 {
245 if (last != first) { 304 if (last != first) {
246 memmove (first, last, (end ()-last)*sizeof (T)); 305 memmove (first, last, (end () - last) * sizeof (T));
247 _last -= last - first; 306 _last -= last - first;
248 } 307 }
249 } 308 }
250 void erase (iterator pos) 309 void erase (iterator pos)
251 { 310 {
252 if (pos != end ()) { 311 if (pos != end ()) {
253 memmove (pos, pos+1, (end ()- (pos+1))*sizeof (T)); 312 memmove (pos, pos+1, (end () - (pos+1)) * sizeof (T));
254 --_last; 313 --_last;
255 } 314 }
256 } 315 }
257 void swap (simplevec<T> &t) 316 void swap (simplevec<T> &t)
258 { 317 {
… …
376struct stringvec : simplevec<char *> 435struct stringvec : simplevec<char *>
377{ 436{
378 ~stringvec () 437 ~stringvec ()
379 { 438 {
380 for (char **c = begin (); c != end (); c++) 439 for (char **c = begin (); c != end (); c++)
381 delete [] *c; 440 free (*c);
382 } 441 }
383}; 442};
384 443
444// return a very temporary (and never deallocated) buffer. keep small.
445void *rxvt_temp_buf (int len);
446
447template<typename T>
448static inline T *
449rxvt_temp_buf (int len)
450{
451 return (T *)rxvt_temp_buf (len * sizeof (T));
452}
453
385#endif 454#endif
386 455

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