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/cvs/rxvt-unicode/src/rxvtutil.h
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Comparing rxvt-unicode/src/rxvtutil.h (file contents):
Revision 1.14 by root, Wed Dec 21 14:23:30 2005 UTC vs.
Revision 1.30 by root, Tue Nov 20 17:44:44 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__ >= 3
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
17template<typename T, typename U> static inline T min (T a, U b) { return a < (T)b ? a : (T)b; } 47template<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; } 48template<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; } 49template<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; } 50template<typename T, typename U> static inline void max_it (T &a, U b) { a = a > (T)b ? a : (T)b; }
21 51
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; } 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; }
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; } 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; }
24 54
25template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; } 55template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; }
26 56
57template<typename T> static inline T squared_diff (T a, T b) { return (a-b)*(a-b); }
58
59// linear interpolation
60template<typename T, typename U, typename P>
61static inline
62T lerp (T a, U b, P p)
63{
64 return (long(a) * long(100 - p) + long(b) * long(p) + 50) / 100;
65}
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
27// in range including end 77// in range including end
28#define IN_RANGE_INC(val,beg,end) \ 78#define IN_RANGE_INC(val,beg,end) \
29 ((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))
30 80
31// in range excluding end 81// in range excluding end
32#define IN_RANGE_EXC(val,beg,end) \ 82#define IN_RANGE_EXC(val,beg,end) \
33 ((unsigned int)(val) - (unsigned int)(beg) < (unsigned int)(end) - (unsigned int)(beg)) 83 ((unsigned int)(val) - (unsigned int)(beg) < (unsigned int)(end) - (unsigned int)(beg))
34 84
85// makes dynamically allocated objects zero-initialised
35struct zero_initialized { 86struct zero_initialized {
36 void *operator new (size_t s); 87 void *operator new (size_t s);
37 void operator delete (void *p, size_t s); 88 void operator delete (void *p, size_t s);
38}; 89};
39 90
40/* simplevec taken (and heavily modified), from: 91/* simplevec taken (and heavily modified), from:
41 * 92 *
42 * MICO --- a free CORBA implementation 93 * MICO --- a free CORBA implementation
43 * Copyright (C) 1997-98 Kay Roemer & Arno Puder 94 * Copyright (C) 1997-98 Kay Roemer & Arno Puder
44 */ 95 */
45template<class T> 96template<class T>
46struct simplevec { 97struct simplevec {
… …
249 return pos; 300 return pos;
250 } 301 }
251 void erase (iterator first, iterator last) 302 void erase (iterator first, iterator last)
252 { 303 {
253 if (last != first) { 304 if (last != first) {
254 memmove (first, last, (end ()-last)*sizeof (T)); 305 memmove (first, last, (end () - last) * sizeof (T));
255 _last -= last - first; 306 _last -= last - first;
256 } 307 }
257 } 308 }
258 void erase (iterator pos) 309 void erase (iterator pos)
259 { 310 {
260 if (pos != end ()) { 311 if (pos != end ()) {
261 memmove (pos, pos+1, (end ()- (pos+1))*sizeof (T)); 312 memmove (pos, pos+1, (end () - (pos+1)) * sizeof (T));
262 --_last; 313 --_last;
263 } 314 }
264 } 315 }
265 void swap (simplevec<T> &t) 316 void swap (simplevec<T> &t)
266 { 317 {
… …
384struct stringvec : simplevec<char *> 435struct stringvec : simplevec<char *>
385{ 436{
386 ~stringvec () 437 ~stringvec ()
387 { 438 {
388 for (char **c = begin (); c != end (); c++) 439 for (char **c = begin (); c != end (); c++)
389 delete [] *c; 440 free (*c);
390 } 441 }
391}; 442};
392 443
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
393#endif 454#endif
394 455

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