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/cvs/rxvt-unicode/src/rxvtutil.h
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Comparing rxvt-unicode/src/rxvtutil.h (file contents):
Revision 1.22 by root, Sun Jan 29 22:27:04 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)
11 13
12// actually, some gcc-3.x versions work, too 14// actually, some gcc-3.x versions work, too
13#define HAVE_GCC_BUILTINS (__GNUC__ >= 4) 15#define HAVE_GCC_BUILTINS (__GNUC__ >= 4)
14#define HAVE_GCC_BUILTINS 0 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
15 38
16extern class byteorder { 39extern class byteorder {
17 static unsigned int e; // at least 32 bits 40 static unsigned int e; // at least 32 bits
18public: 41public:
19 byteorder (); 42 byteorder ();
33template<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; }
34template<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; }
35 58
36template<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; }
37 60
61template<typename T> static inline T squared_diff (T a, T b) { return (a-b)*(a-b); }
62
38// linear interpolation 63// linear interpolation
39template<typename T, typename U, typename P> 64template<typename T, typename U, typename P>
40static inline 65static inline
41T lerp (T a, U b, P p) 66T lerp (T a, U b, P p)
42{ 67{
43 return (int(a) * int(p) + int(b) * int(100 - p)) / 100; 68 return (long(a) * long(100 - p) + long(b) * long(p) + 50) / 100;
44} 69}
45 70
46// some bit functions, xft fuck me plenty 71// some bit functions, xft fuck me plenty
47#if HAVE_GCC_BUILTINS 72#if HAVE_GCC_BUILTINS
48static inline int ctz (unsigned int x) { return __builtin_ctz (x); } 73static inline int ctz (unsigned int x) CONST { return __builtin_ctz (x); }
49static inline int popcount (unsigned int x) { return __builtin_popcount (x); } 74static inline int popcount (unsigned int x) CONST { return __builtin_popcount (x); }
50#else 75#else
51// count trailing zero bits and count # of one bits 76// count trailing zero bits and count # of one bits
52int ctz (unsigned int x); 77int ctz (unsigned int x) CONST;
53int popcount (unsigned int x); 78int popcount (unsigned int x) CONST;
54#endif 79#endif
55 80
56// in range including end 81// in range including end
57#define IN_RANGE_INC(val,beg,end) \ 82#define IN_RANGE_INC(val,beg,end) \
58 ((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))
422 447
423// return a very temporary (and never deallocated) buffer. keep small. 448// return a very temporary (and never deallocated) buffer. keep small.
424void *rxvt_temp_buf (int len); 449void *rxvt_temp_buf (int len);
425 450
426template<typename T> 451template<typename T>
427inline T * 452static inline T *
428rxvt_temp_buf (int len) 453rxvt_temp_buf (int len)
429{ 454{
430 return (T *)rxvt_temp_buf (len * sizeof (T)); 455 return (T *)rxvt_temp_buf (len * sizeof (T));
431} 456}
432 457

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