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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 1.42 by root, Mon Jan 3 03:05:47 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 <cstdlib>
5#include <cstring> 5#include <cstring>
6#include <inttypes.h>
7
8using namespace std;
9
10#define ARRAY_LENGTH(v) (sizeof (v) / sizeof ((v)[0]))
6 11
7#define PP_CONCAT_(a, b) a ## b 12#define PP_CONCAT_(a, b) a ## b
8#define PP_CONCAT(a, b) PP_CONCAT_(a, b) 13#define PP_CONCAT(a, b) PP_CONCAT_(a, b)
9#define PP_STRINGIFY_(a) #a 14#define PP_STRINGIFY_(a) #a
10#define PP_STRINGIFY(a) PP_STRINGIFY_(a) 15#define PP_STRINGIFY(a) PP_STRINGIFY_(a)
11 16
12extern class byteorder { 17#define HAVE_GCC_BUILTINS (__GNUC__ >= 4 || (__GNUC__ == 3 && __GNUC_MINOR__ == 4))
13 static unsigned int e; // at least 32 bits
14public:
15 byteorder ();
16 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 uint32_t e ()
48 {
49 char c [4] = { 0x11, 0x22, 0x33, 0x44 };
50 return *(uint32_t *)c;
51 }
52
17 static bool big_endian () { return e == 0x11223344; }; 53 static bool big_endian () { return e () == 0x11223344; };
18 static bool network () { return e == 0x11223344; }; 54 static bool network () { return big_endian (); };
19 static bool little_endian () { return e == 0x44332211; }; 55 static bool little_endian () { return e () == 0x44332211; };
20 static bool vax () { return e == 0x44332211; }; 56 static bool vax () { return little_endian (); };
21} byteorder; 57};
22 58
23// various utility functions 59// various utility functions
24template<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; }
25template<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; }
26template<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; }
… …
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; } 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; }
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; } 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; }
31 67
32template<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; }
33 69
70template<typename T> static inline T squared_diff (T a, T b) { return (a-b)*(a-b); }
71
34// linear interpolation 72// linear interpolation
35template<typename T, typename U, typename P> 73template<typename T, typename U, typename P>
36static inline 74static inline
37T lerp (T a, U b, P p) 75T lerp (T a, U b, P p)
38{ 76{
39 return (int(a) * int(p) + int(b) * int(100 - p)) / 100; 77 return (long(a) * long(100 - p) + long(b) * long(p) + 50) / 100;
40} 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
41 109
42// in range including end 110// in range including end
43#define IN_RANGE_INC(val,beg,end) \ 111#define IN_RANGE_INC(val,beg,end) \
44 ((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))
45 113
46// in range excluding end 114// in range excluding end
47#define IN_RANGE_EXC(val,beg,end) \ 115#define IN_RANGE_EXC(val,beg,end) \
48 ((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))
49 117
118// for m >= -n, ensure remainder lies between 0..n-1
119#define MOD(m,n) (((m) + (n)) % (n))
120
50// makes dynamically allocated objects zero-initialised 121// makes dynamically allocated objects zero-initialised
51struct zero_initialized { 122struct zero_initialized
123{
52 void *operator new (size_t s); 124 void *operator new (size_t s);
53 void operator delete (void *p, size_t s); 125 void operator delete (void *p, size_t s);
54}; 126};
55 127
56/* simplevec taken (and heavily modified), from: 128/* simplevec taken (and heavily modified), from:
57 * 129 *
58 * MICO --- a free CORBA implementation 130 * MICO --- a free CORBA implementation
59 * Copyright (C) 1997-98 Kay Roemer & Arno Puder 131 * Copyright (C) 1997-98 Kay Roemer & Arno Puder
60 */ 132 */
61template<class T> 133template<class T>
62struct simplevec { 134struct simplevec
135{
63 typedef T* iterator; 136 typedef T* iterator;
64 typedef const T* const_iterator; 137 typedef const T* const_iterator;
65 typedef unsigned long size_type; 138 typedef unsigned long size_type;
66 139
67private: 140private:
… …
308} 381}
309 382
310 383
311template<typename T> 384template<typename T>
312struct vector : simplevec<T> 385struct vector : simplevec<T>
313{ }; 386{
387};
388
389struct stringvec : simplevec<char *>
390{
391 ~stringvec ()
392 {
393 for (char **c = begin (); c != end (); c++)
394 free (*c);
395 }
396};
314 397
315#if 0 398#if 0
316template<typename T> 399template<typename T>
317struct rxvt_vec : simplevec<void *> { 400struct rxvt_vec : simplevec<void *>
401{
318 typedef T *iterator; 402 typedef T *iterator;
319 403
320 void push_back (T d) { simplevec<void *>::push_back ((void *)d); } 404 void push_back (T d) { simplevec<void *>::push_back ((void *)d); }
321 T pop_back () { return (T*)simplevec<void *>::pop_back (); } 405 T pop_back () { return (T*)simplevec<void *>::pop_back (); }
322 void erase (int i) { erase (begin () + i); } 406 void erase (int i) { erase (begin () + i); }
… …
326 T &operator [] (int i) { return * (T *) (& ((* (simplevec<void *> *)this)[i])); } 410 T &operator [] (int i) { return * (T *) (& ((* (simplevec<void *> *)this)[i])); }
327 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])); }
328}; 412};
329#endif 413#endif
330 414
331template <typename I, typename T>
332I find (I first, I last, const T& value)
333{
334 while (first != last && *first != value)
335 ++first;
336
337 return first;
338}
339
340template<typename T> 415template<typename T>
341struct auto_ptr { 416struct auto_ptr
417{
342 T *p; 418 T *p;
343 419
344 auto_ptr () : p (0) { } 420 auto_ptr () : p (0) { }
345 auto_ptr (T *a) : p (a) { } 421 auto_ptr (T *a) : p (a) { }
346 422
… …
395 } 471 }
396}; 472};
397 473
398typedef auto_ptr<char> auto_str; 474typedef auto_ptr<char> auto_str;
399 475
400struct stringvec : simplevec<char *>
401{
402 ~stringvec ()
403 {
404 for (char **c = begin (); c != end (); c++)
405 free (*c);
406 }
407};
408
409// return a very temporary (and never deallocated) buffer. keep small.
410void *rxvt_temp_buf (int len);
411
412template<typename T>
413inline T *
414rxvt_temp_buf (int len)
415{
416 return (T *)rxvt_temp_buf (len * sizeof (T));
417}
418
419#endif 476#endif
420 477

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