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/cvs/rxvt-unicode/src/rxvtutil.h
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Comparing rxvt-unicode/src/rxvtutil.h (file contents):
Revision 1.18 by root, Tue Jan 17 16:06:48 2006 UTC vs.
Revision 1.43 by root, Mon Jan 3 18:42:58 2011 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#include <inttypes.h>
7
8using namespace std;
9
10#define ARRAY_LENGTH(v) (sizeof (v) / sizeof ((v)[0]))
5 11
6#define PP_CONCAT_(a, b) a ## b 12#define PP_CONCAT_(a, b) a ## b
7#define PP_CONCAT(a, b) PP_CONCAT_(a, b) 13#define PP_CONCAT(a, b) PP_CONCAT_(a, b)
8#define PP_STRINGIFY_(a) #a 14#define PP_STRINGIFY_(a) #a
9#define PP_STRINGIFY(a) PP_STRINGIFY_(a) 15#define PP_STRINGIFY(a) PP_STRINGIFY_(a)
10 16
11extern class byteorder { 17#define HAVE_GCC_BUILTINS (__GNUC__ >= 4 || (__GNUC__ == 3 && __GNUC_MINOR__ == 4))
12 static unsigned int e; // at least 32 bits
13public:
14 byteorder ();
15 18
19#if __GNUC__ >= 4
20# define rxvt_attribute(x) __attribute__(x)
21# define expect(expr,value) __builtin_expect ((expr),(value))
22#else
23# define rxvt_attribute(x)
24# define expect(expr,value) (expr)
25#endif
26
27// put into ifs if you are very sure that the expression
28// is mostly true or mostly false. note that these return
29// booleans, not the expression.
30#define expect_false(expr) expect ((expr) != 0, 0)
31#define expect_true(expr) expect ((expr) != 0, 1)
32
33#define NORETURN rxvt_attribute ((noreturn))
34#define UNUSED rxvt_attribute ((unused))
35#define CONST rxvt_attribute ((const))
36
37// increases code size unless -fno-enforce-eh-specs
38#if __GNUC__
39# define NOTHROW
40# define THROW(x)
41#else
42# define NOTHROW throw()
43# define THROW(x) throw x
44#endif
45
46namespace byteorder {
47 static unsigned char e ()
48 {
49 const uint32_t u = 0x11223344;
50 return *(unsigned char *)u;
51 }
52
16 static bool big_endian () { return e == 0x11223344; }; 53 static bool big_endian () { return e () == 0x11; };
17 static bool network () { return e == 0x11223344; }; 54 static bool network () { return big_endian (); };
18 static bool little_endian () { return e == 0x44332211; }; 55 static bool little_endian () { return e () == 0x44; };
19 static bool vax () { return e == 0x44332211; }; 56 static bool vax () { return little_endian (); };
20} byteorder; 57};
21 58
22// various utility functions 59// various utility functions
23template<typename T, typename U> static inline T min (T a, U b) { return a < (T)b ? a : (T)b; } 60template<typename T, typename U> static inline T min (T a, U b) { return a < (T)b ? a : (T)b; }
24template<typename T, typename U> static inline void min_it (T &a, U b) { a = a < (T)b ? a : (T)b; } 61template<typename T, typename U> static inline void min_it (T &a, U b) { a = a < (T)b ? a : (T)b; }
25template<typename T, typename U> static inline T max (T a, U b) { return a > (T)b ? a : (T)b; } 62template<typename T, typename U> static inline T max (T a, U b) { return a > (T)b ? a : (T)b; }
… …
28template<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; } 65template<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; }
29template<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; } 66template<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; }
30 67
31template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; } 68template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; }
32 69
70template<typename T> static inline T squared_diff (T a, T b) { return (a-b)*(a-b); }
71
72// linear interpolation
73template<typename T, typename U, typename P>
74static inline
75T lerp (T a, U b, P p)
76{
77 return (long(a) * long(100 - p) + long(b) * long(p) + 50) / 100;
78}
79
80template <typename I, typename T>
81I find (I first, I last, const T& value)
82{
83 while (first != last && *first != value)
84 ++first;
85
86 return first;
87}
88
89// return a very temporary (and never deallocated) buffer. keep small.
90void *rxvt_temp_buf (int len);
91
92template<typename T>
93static inline T *
94rxvt_temp_buf (int len)
95{
96 return (T *)rxvt_temp_buf (len * sizeof (T));
97}
98
99// some bit functions, xft fuck me plenty
100#if HAVE_GCC_BUILTINS
101/* netbsd stupidly defines popcount itself and puts it into string.h */
102static inline int rxvt_ctz (unsigned int x) { return __builtin_ctz (x); }
103static inline int rxvt_popcount (unsigned int x) { return __builtin_popcount (x); }
104#else
105// count trailing zero bits and count # of one bits
106int rxvt_ctz (unsigned int x) CONST;
107int rxvt_popcount (unsigned int x) CONST;
108#endif
109
33// in range including end 110// in range including end
34#define IN_RANGE_INC(val,beg,end) \ 111#define IN_RANGE_INC(val,beg,end) \
35 ((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg)) 112 ((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg))
36 113
37// in range excluding end 114// in range excluding end
38#define IN_RANGE_EXC(val,beg,end) \ 115#define IN_RANGE_EXC(val,beg,end) \
39 ((unsigned int)(val) - (unsigned int)(beg) < (unsigned int)(end) - (unsigned int)(beg)) 116 ((unsigned int)(val) - (unsigned int)(beg) < (unsigned int)(end) - (unsigned int)(beg))
40 117
118// for m >= -n, ensure remainder lies between 0..n-1
119#define MOD(m,n) (((m) + (n)) % (n))
120
41// makes dynamically allocated objects zero-initialised 121// makes dynamically allocated objects zero-initialised
42struct zero_initialized { 122struct zero_initialized
123{
43 void *operator new (size_t s); 124 void *operator new (size_t s);
44 void operator delete (void *p, size_t s); 125 void operator delete (void *p, size_t s);
45}; 126};
46 127
47/* simplevec taken (and heavily modified), from: 128/* simplevec taken (and heavily modified), from:
48 * 129 *
49 * MICO --- a free CORBA implementation 130 * MICO --- a free CORBA implementation
50 * Copyright (C) 1997-98 Kay Roemer & Arno Puder 131 * Copyright (C) 1997-98 Kay Roemer & Arno Puder
51 */ 132 */
52template<class T> 133template<class T>
53struct simplevec { 134struct simplevec
135{
54 typedef T* iterator; 136 typedef T* iterator;
55 typedef const T* const_iterator; 137 typedef const T* const_iterator;
56 typedef unsigned long size_type; 138 typedef unsigned long size_type;
57 139
58private: 140private:
… …
299} 381}
300 382
301 383
302template<typename T> 384template<typename T>
303struct vector : simplevec<T> 385struct vector : simplevec<T>
304{ }; 386{
387};
388
389struct stringvec : simplevec<char *>
390{
391 ~stringvec ()
392 {
393 for (char **c = begin (); c != end (); c++)
394 free (*c);
395 }
396};
305 397
306#if 0 398#if 0
307template<typename T> 399template<typename T>
308struct rxvt_vec : simplevec<void *> { 400struct rxvt_vec : simplevec<void *>
401{
309 typedef T *iterator; 402 typedef T *iterator;
310 403
311 void push_back (T d) { simplevec<void *>::push_back ((void *)d); } 404 void push_back (T d) { simplevec<void *>::push_back ((void *)d); }
312 T pop_back () { return (T*)simplevec<void *>::pop_back (); } 405 T pop_back () { return (T*)simplevec<void *>::pop_back (); }
313 void erase (int i) { erase (begin () + i); } 406 void erase (int i) { erase (begin () + i); }
… …
317 T &operator [] (int i) { return * (T *) (& ((* (simplevec<void *> *)this)[i])); } 410 T &operator [] (int i) { return * (T *) (& ((* (simplevec<void *> *)this)[i])); }
318 const T &operator [] (int i) const { return * (const T *) (& ((* (const simplevec<void *> *)this)[i])); } 411 const T &operator [] (int i) const { return * (const T *) (& ((* (const simplevec<void *> *)this)[i])); }
319}; 412};
320#endif 413#endif
321 414
322template <typename I, typename T>
323I find (I first, I last, const T& value)
324{
325 while (first != last && *first != value)
326 ++first;
327
328 return first;
329}
330
331template<typename T> 415template<typename T>
332struct auto_ptr { 416struct auto_ptr
417{
333 T *p; 418 T *p;
334 419
335 auto_ptr () : p (0) { } 420 auto_ptr () : p (0) { }
336 auto_ptr (T *a) : p (a) { } 421 auto_ptr (T *a) : p (a) { }
337 422
… …
386 } 471 }
387}; 472};
388 473
389typedef auto_ptr<char> auto_str; 474typedef auto_ptr<char> auto_str;
390 475
391struct stringvec : simplevec<char *>
392{
393 ~stringvec ()
394 {
395 for (char **c = begin (); c != end (); c++)
396 delete [] *c;
397 }
398};
399
400#endif 476#endif
401 477

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