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/cvs/rxvt-unicode/src/rxvtutil.h
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Comparing rxvt-unicode/src/rxvtutil.h (file contents):
Revision 1.21 by root, Sun Jan 29 20:51:28 2006 UTC vs.
Revision 1.27 by root, Fri Jun 23 14:31:38 2006 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 <cstdlib>
5#include <cstring> 5#include <cstring>
6
7using namespace std;
6 8
7#define PP_CONCAT_(a, b) a ## b 9#define PP_CONCAT_(a, b) a ## b
8#define PP_CONCAT(a, b) PP_CONCAT_(a, b) 10#define PP_CONCAT(a, b) PP_CONCAT_(a, b)
9#define PP_STRINGIFY_(a) #a 11#define PP_STRINGIFY_(a) #a
10#define PP_STRINGIFY(a) PP_STRINGIFY_(a) 12#define PP_STRINGIFY(a) PP_STRINGIFY_(a)
13
14// actually, some gcc-3.x versions work, too
15#define HAVE_GCC_BUILTINS (__GNUC__ >= 4)
16
17#ifndef __attribute__
18# if __GNUC__
19# if (__GNUC__ == 2 && __GNUC_MINOR__ < 5) || (__GNUC__ < 2)
20# define __attribute__(x)
21# endif
22# endif
23# define __attribute__(x)
24#endif
25
26#define NORETURN __attribute__ ((noreturn))
27#define UNUSED __attribute__ ((unused))
28#define CONST __attribute__ ((const))
29
30// increases code size unless -fno-enforce-eh-specs
31#if __GNUC__
32# define NOTHROW
33# define THROW(x)
34#else
35# define NOTHROW throw()
36# define THROW(x) throw x
37#endif
11 38
12extern class byteorder { 39extern class byteorder {
13 static unsigned int e; // at least 32 bits 40 static unsigned int e; // at least 32 bits
14public: 41public:
15 byteorder (); 42 byteorder ();
… …
29template<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; } 56template<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; }
30template<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; } 57template<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; }
31 58
32template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; } 59template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; }
33 60
61template<typename T> static inline T squared_diff (T a, T b) { return (a-b)*(a-b); }
62
34// linear interpolation 63// linear interpolation
35template<typename T, typename U, typename P> 64template<typename T, typename U, typename P>
36static inline 65static inline
37T lerp (T a, U b, P p) 66T lerp (T a, U b, P p)
38{ 67{
39 return (int(a) * int(p) + int(b) * int(100 - p)) / 100; 68 return (long(a) * long(100 - p) + long(b) * long(p) + 50) / 100;
40} 69}
70
71// some bit functions, xft fuck me plenty
72#if HAVE_GCC_BUILTINS
73static inline int ctz (unsigned int x) CONST { return __builtin_ctz (x); }
74static inline int popcount (unsigned int x) CONST { return __builtin_popcount (x); }
75#else
76// count trailing zero bits and count # of one bits
77int ctz (unsigned int x) CONST;
78int popcount (unsigned int x) CONST;
79#endif
41 80
42// in range including end 81// in range including end
43#define IN_RANGE_INC(val,beg,end) \ 82#define IN_RANGE_INC(val,beg,end) \
44 ((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))
45 84
… …
408 447
409// return a very temporary (and never deallocated) buffer. keep small. 448// return a very temporary (and never deallocated) buffer. keep small.
410void *rxvt_temp_buf (int len); 449void *rxvt_temp_buf (int len);
411 450
412template<typename T> 451template<typename T>
413inline T * 452static inline T *
414rxvt_temp_buf (int len) 453rxvt_temp_buf (int len)
415{ 454{
416 return (T *)rxvt_temp_buf (len * sizeof (T)); 455 return (T *)rxvt_temp_buf (len * sizeof (T));
417} 456}
418 457

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