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/cvs/rxvt-unicode/src/rxvtutil.h
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Comparing rxvt-unicode/src/rxvtutil.h (file contents):
Revision 1.19 by root, Sun Jan 22 00:36:59 2006 UTC vs.
Revision 1.37 by root, Mon Jul 21 16:51:31 2008 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#define HAVE_GCC_BUILTINS (__GNUC__ >= 4 || (__GNUC__ == 3 && __GNUC_MINOR__ == 4))
15
16#if __GNUC__ >= 4
17# define rxvt_attribute(x) __attribute__(x)
18# define expect(expr,value) __builtin_expect ((expr),(value))
19#else
20# define rxvt_attribute(x)
21# define expect(expr,value) (expr)
22#endif
23
24// put into ifs if you are very sure that the expression
25// is mostly true or mosty false. note that these return
26// booleans, not the expression.
27#define expect_false(expr) expect ((expr) != 0, 0)
28#define expect_true(expr) expect ((expr) != 0, 1)
29
30#define NORETURN rxvt_attribute ((noreturn))
31#define UNUSED rxvt_attribute ((unused))
32#define CONST rxvt_attribute ((const))
33
34// increases code size unless -fno-enforce-eh-specs
35#if __GNUC__
36# define NOTHROW
37# define THROW(x)
38#else
39# define NOTHROW throw()
40# define THROW(x) throw x
41#endif
11 42
12extern class byteorder { 43extern class byteorder {
13 static unsigned int e; // at least 32 bits 44 static unsigned int e; // at least 32 bits
14public: 45public:
15 byteorder (); 46 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; } 60template<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; } 61template<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 62
32template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; } 63template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; }
33 64
65template<typename T> static inline T squared_diff (T a, T b) { return (a-b)*(a-b); }
66
67// linear interpolation
68template<typename T, typename U, typename P>
69static inline
70T lerp (T a, U b, P p)
71{
72 return (long(a) * long(100 - p) + long(b) * long(p) + 50) / 100;
73}
74
75template <typename I, typename T>
76I find (I first, I last, const T& value)
77{
78 while (first != last && *first != value)
79 ++first;
80
81 return first;
82}
83
84// return a very temporary (and never deallocated) buffer. keep small.
85void *rxvt_temp_buf (int len);
86
87template<typename T>
88static inline T *
89rxvt_temp_buf (int len)
90{
91 return (T *)rxvt_temp_buf (len * sizeof (T));
92}
93
94// some bit functions, xft fuck me plenty
95#if HAVE_GCC_BUILTINS
96static inline int ctz (unsigned int x) { return __builtin_ctz (x); }
97static inline int popcount (unsigned int x) { return __builtin_popcount (x); }
98#else
99// count trailing zero bits and count # of one bits
100int ctz (unsigned int x) CONST;
101int popcount (unsigned int x) CONST;
102#endif
103
34// in range including end 104// in range including end
35#define IN_RANGE_INC(val,beg,end) \ 105#define IN_RANGE_INC(val,beg,end) \
36 ((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg)) 106 ((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg))
37 107
38// in range excluding end 108// in range excluding end
39#define IN_RANGE_EXC(val,beg,end) \ 109#define IN_RANGE_EXC(val,beg,end) \
40 ((unsigned int)(val) - (unsigned int)(beg) < (unsigned int)(end) - (unsigned int)(beg)) 110 ((unsigned int)(val) - (unsigned int)(beg) < (unsigned int)(end) - (unsigned int)(beg))
111
112// for m >= -n, ensure remainder lies between 0..n-1
113#define MOD(m,n) (((m) + (n)) % (n))
41 114
42// makes dynamically allocated objects zero-initialised 115// makes dynamically allocated objects zero-initialised
43struct zero_initialized { 116struct zero_initialized {
44 void *operator new (size_t s); 117 void *operator new (size_t s);
45 void operator delete (void *p, size_t s); 118 void operator delete (void *p, size_t s);
46}; 119};
47 120
48/* simplevec taken (and heavily modified), from: 121/* simplevec taken (and heavily modified), from:
49 * 122 *
50 * MICO --- a free CORBA implementation 123 * MICO --- a free CORBA implementation
51 * Copyright (C) 1997-98 Kay Roemer & Arno Puder 124 * Copyright (C) 1997-98 Kay Roemer & Arno Puder
52 */ 125 */
53template<class T> 126template<class T>
54struct simplevec { 127struct simplevec {
… …
300} 373}
301 374
302 375
303template<typename T> 376template<typename T>
304struct vector : simplevec<T> 377struct vector : simplevec<T>
305{ }; 378{
379};
380
381struct stringvec : simplevec<char *>
382{
383 ~stringvec ()
384 {
385 for (char **c = begin (); c != end (); c++)
386 free (*c);
387 }
388};
306 389
307#if 0 390#if 0
308template<typename T> 391template<typename T>
309struct rxvt_vec : simplevec<void *> { 392struct rxvt_vec : simplevec<void *> {
310 typedef T *iterator; 393 typedef T *iterator;
… …
318 T &operator [] (int i) { return * (T *) (& ((* (simplevec<void *> *)this)[i])); } 401 T &operator [] (int i) { return * (T *) (& ((* (simplevec<void *> *)this)[i])); }
319 const T &operator [] (int i) const { return * (const T *) (& ((* (const simplevec<void *> *)this)[i])); } 402 const T &operator [] (int i) const { return * (const T *) (& ((* (const simplevec<void *> *)this)[i])); }
320}; 403};
321#endif 404#endif
322 405
323template <typename I, typename T>
324I find (I first, I last, const T& value)
325{
326 while (first != last && *first != value)
327 ++first;
328
329 return first;
330}
331
332template<typename T> 406template<typename T>
333struct auto_ptr { 407struct auto_ptr {
334 T *p; 408 T *p;
335 409
336 auto_ptr () : p (0) { } 410 auto_ptr () : p (0) { }
… …
387 } 461 }
388}; 462};
389 463
390typedef auto_ptr<char> auto_str; 464typedef auto_ptr<char> auto_str;
391 465
392struct stringvec : simplevec<char *>
393{
394 ~stringvec ()
395 {
396 for (char **c = begin (); c != end (); c++)
397 free (*c);
398 }
399};
400
401#endif 466#endif
402 467

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