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/cvs/rxvt-unicode/src/rxvtutil.h
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Comparing rxvt-unicode/src/rxvtutil.h (file contents):
Revision 1.15 by root, Mon Jan 2 15:35:43 2006 UTC vs.
Revision 1.29 by ayin, Wed Oct 31 09:55:24 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;
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#ifndef __attribute__
17# if __GNUC__
18# if (__GNUC__ == 2 && __GNUC_MINOR__ < 5) || (__GNUC__ < 2)
19# define __attribute__(x)
20# endif
21# endif
22# define __attribute__(x)
23#endif
24
25#define NORETURN __attribute__ ((noreturn))
26#define UNUSED __attribute__ ((unused))
27#define CONST __attribute__ ((const))
28
29// increases code size unless -fno-enforce-eh-specs
30#if __GNUC__
31# define NOTHROW
32# define THROW(x)
33#else
34# define NOTHROW throw()
35# define THROW(x) throw x
36#endif
10 37
11extern class byteorder { 38extern class byteorder {
12 static unsigned int e; // at least 32 bits 39 static unsigned int e; // at least 32 bits
13public: 40public:
14 byteorder (); 41 byteorder ();
… …
17 static bool network () { return e == 0x11223344; }; 44 static bool network () { return e == 0x11223344; };
18 static bool little_endian () { return e == 0x44332211; }; 45 static bool little_endian () { return e == 0x44332211; };
19 static bool vax () { return e == 0x44332211; }; 46 static bool vax () { return e == 0x44332211; };
20} byteorder; 47} byteorder;
21 48
49// various utility functions
22template<typename T, typename U> static inline T min (T a, U b) { return a < (T)b ? a : (T)b; } 50template<typename T, typename U> static inline T min (T a, U b) { return a < (T)b ? a : (T)b; }
23template<typename T, typename U> static inline void min_it (T &a, U b) { a = a < (T)b ? a : (T)b; } 51template<typename T, typename U> static inline void min_it (T &a, U b) { a = a < (T)b ? a : (T)b; }
24template<typename T, typename U> static inline T max (T a, U b) { return a > (T)b ? a : (T)b; } 52template<typename T, typename U> static inline T max (T a, U b) { return a > (T)b ? a : (T)b; }
25template<typename T, typename U> static inline void max_it (T &a, U b) { a = a > (T)b ? a : (T)b; } 53template<typename T, typename U> static inline void max_it (T &a, U b) { a = a > (T)b ? a : (T)b; }
26 54
27template<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; } 55template<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; }
28template<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; } 56template<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; }
29 57
30template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; } 58template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; }
31 59
60template<typename T> static inline T squared_diff (T a, T b) { return (a-b)*(a-b); }
61
62// linear interpolation
63template<typename T, typename U, typename P>
64static inline
65T lerp (T a, U b, P p)
66{
67 return (long(a) * long(100 - p) + long(b) * long(p) + 50) / 100;
68}
69
70// some bit functions, xft fuck me plenty
71#if HAVE_GCC_BUILTINS
72static inline int ctz (unsigned int x) CONST { return __builtin_ctz (x); }
73static inline int popcount (unsigned int x) CONST { return __builtin_popcount (x); }
74#else
75// count trailing zero bits and count # of one bits
76int ctz (unsigned int x) CONST;
77int popcount (unsigned int x) CONST;
78#endif
79
32// in range including end 80// in range including end
33#define IN_RANGE_INC(val,beg,end) \ 81#define IN_RANGE_INC(val,beg,end) \
34 ((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg)) 82 ((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg))
35 83
36// in range excluding end 84// in range excluding end
37#define IN_RANGE_EXC(val,beg,end) \ 85#define IN_RANGE_EXC(val,beg,end) \
38 ((unsigned int)(val) - (unsigned int)(beg) < (unsigned int)(end) - (unsigned int)(beg)) 86 ((unsigned int)(val) - (unsigned int)(beg) < (unsigned int)(end) - (unsigned int)(beg))
39 87
88// makes dynamically allocated objects zero-initialised
40struct zero_initialized { 89struct zero_initialized {
41 void *operator new (size_t s); 90 void *operator new (size_t s);
42 void operator delete (void *p, size_t s); 91 void operator delete (void *p, size_t s);
43}; 92};
44 93
45/* simplevec taken (and heavily modified), from: 94/* simplevec taken (and heavily modified), from:
46 * 95 *
47 * MICO --- a free CORBA implementation 96 * MICO --- a free CORBA implementation
48 * Copyright (C) 1997-98 Kay Roemer & Arno Puder 97 * Copyright (C) 1997-98 Kay Roemer & Arno Puder
49 */ 98 */
50template<class T> 99template<class T>
51struct simplevec { 100struct simplevec {
… …
254 return pos; 303 return pos;
255 } 304 }
256 void erase (iterator first, iterator last) 305 void erase (iterator first, iterator last)
257 { 306 {
258 if (last != first) { 307 if (last != first) {
259 memmove (first, last, (end ()-last)*sizeof (T)); 308 memmove (first, last, (end () - last) * sizeof (T));
260 _last -= last - first; 309 _last -= last - first;
261 } 310 }
262 } 311 }
263 void erase (iterator pos) 312 void erase (iterator pos)
264 { 313 {
265 if (pos != end ()) { 314 if (pos != end ()) {
266 memmove (pos, pos+1, (end ()- (pos+1))*sizeof (T)); 315 memmove (pos, pos+1, (end () - (pos+1)) * sizeof (T));
267 --_last; 316 --_last;
268 } 317 }
269 } 318 }
270 void swap (simplevec<T> &t) 319 void swap (simplevec<T> &t)
271 { 320 {
… …
389struct stringvec : simplevec<char *> 438struct stringvec : simplevec<char *>
390{ 439{
391 ~stringvec () 440 ~stringvec ()
392 { 441 {
393 for (char **c = begin (); c != end (); c++) 442 for (char **c = begin (); c != end (); c++)
394 delete [] *c; 443 free (*c);
395 } 444 }
396}; 445};
397 446
447// return a very temporary (and never deallocated) buffer. keep small.
448void *rxvt_temp_buf (int len);
449
450template<typename T>
451static inline T *
452rxvt_temp_buf (int len)
453{
454 return (T *)rxvt_temp_buf (len * sizeof (T));
455}
456
398#endif 457#endif
399 458

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