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Comparing rxvt-unicode/src/rxvtutil.h (file contents):
Revision 1.24 by root, Mon Jan 30 16:12:58 2006 UTC vs.
Revision 1.41 by sf-exg, Sat Dec 18 18:17:39 2010 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;
8
9#define ARRAY_LENGTH(v) (sizeof (v) / sizeof ((v)[0]))
6 10
7#define PP_CONCAT_(a, b) a ## b 11#define PP_CONCAT_(a, b) a ## b
8#define PP_CONCAT(a, b) PP_CONCAT_(a, b) 12#define PP_CONCAT(a, b) PP_CONCAT_(a, b)
9#define PP_STRINGIFY_(a) #a 13#define PP_STRINGIFY_(a) #a
10#define PP_STRINGIFY(a) PP_STRINGIFY_(a) 14#define PP_STRINGIFY(a) PP_STRINGIFY_(a)
11 15
12// actually, some gcc-3.x versions work, too 16#define HAVE_GCC_BUILTINS (__GNUC__ >= 4 || (__GNUC__ == 3 && __GNUC_MINOR__ == 4))
13#define HAVE_GCC_BUILTINS (__GNUC__ >= 4)
14 17
15#ifndef __attribute__
16# if __GNUC__ 18#if __GNUC__ >= 4
17# if (__GNUC__ == 2 && __GNUC_MINOR__ < 5) || (__GNUC__ < 2) 19# define rxvt_attribute(x) __attribute__(x)
18# define __attribute__(x) 20# define expect(expr,value) __builtin_expect ((expr),(value))
19# endif 21#else
20# endif
21# define __attribute__(x) 22# define rxvt_attribute(x)
23# define expect(expr,value) (expr)
22#endif 24#endif
23 25
26// put into ifs if you are very sure that the expression
27// is mostly true or mostly false. note that these return
28// booleans, not the expression.
29#define expect_false(expr) expect ((expr) != 0, 0)
30#define expect_true(expr) expect ((expr) != 0, 1)
31
24#define NORETURN __attribute__ ((noreturn)) 32#define NORETURN rxvt_attribute ((noreturn))
25#define UNUSED __attribute__ ((unused)) 33#define UNUSED rxvt_attribute ((unused))
26#define CONST __attribute__ ((const)) 34#define CONST rxvt_attribute ((const))
27 35
28// increases code size unless -fno-enforce-eh-specs 36// increases code size unless -fno-enforce-eh-specs
29#if __GNUC__ 37#if __GNUC__
30# define NOTHROW 38# define NOTHROW
31# define THROW(x) 39# define THROW(x)
… …
54template<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; } 62template<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; }
55template<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; } 63template<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; }
56 64
57template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; } 65template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; }
58 66
67template<typename T> static inline T squared_diff (T a, T b) { return (a-b)*(a-b); }
68
59// linear interpolation 69// linear interpolation
60template<typename T, typename U, typename P> 70template<typename T, typename U, typename P>
61static inline 71static inline
62T lerp (T a, U b, P p) 72T lerp (T a, U b, P p)
63{ 73{
64 return (int(a) * int(p) + int(b) * int(100 - p)) / 100; 74 return (long(a) * long(100 - p) + long(b) * long(p) + 50) / 100;
75}
76
77template <typename I, typename T>
78I find (I first, I last, const T& value)
79{
80 while (first != last && *first != value)
81 ++first;
82
83 return first;
84}
85
86// return a very temporary (and never deallocated) buffer. keep small.
87void *rxvt_temp_buf (int len);
88
89template<typename T>
90static inline T *
91rxvt_temp_buf (int len)
92{
93 return (T *)rxvt_temp_buf (len * sizeof (T));
65} 94}
66 95
67// some bit functions, xft fuck me plenty 96// some bit functions, xft fuck me plenty
68#if HAVE_GCC_BUILTINS 97#if HAVE_GCC_BUILTINS
98/* netbsd stupidly defines popcount itself and puts it into string.h */
69static inline int ctz (unsigned int x) CONST { return __builtin_ctz (x); } 99static inline int rxvt_ctz (unsigned int x) { return __builtin_ctz (x); }
70static inline int popcount (unsigned int x) CONST { return __builtin_popcount (x); } 100static inline int rxvt_popcount (unsigned int x) { return __builtin_popcount (x); }
71#else 101#else
72// count trailing zero bits and count # of one bits 102// count trailing zero bits and count # of one bits
73int ctz (unsigned int x) CONST; 103int rxvt_ctz (unsigned int x) CONST;
74int popcount (unsigned int x) CONST; 104int rxvt_popcount (unsigned int x) CONST;
75#endif 105#endif
76 106
77// in range including end 107// in range including end
78#define IN_RANGE_INC(val,beg,end) \ 108#define IN_RANGE_INC(val,beg,end) \
79 ((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg)) 109 ((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg))
80 110
81// in range excluding end 111// in range excluding end
82#define IN_RANGE_EXC(val,beg,end) \ 112#define IN_RANGE_EXC(val,beg,end) \
83 ((unsigned int)(val) - (unsigned int)(beg) < (unsigned int)(end) - (unsigned int)(beg)) 113 ((unsigned int)(val) - (unsigned int)(beg) < (unsigned int)(end) - (unsigned int)(beg))
84 114
115// for m >= -n, ensure remainder lies between 0..n-1
116#define MOD(m,n) (((m) + (n)) % (n))
117
85// makes dynamically allocated objects zero-initialised 118// makes dynamically allocated objects zero-initialised
86struct zero_initialized { 119struct zero_initialized
120{
87 void *operator new (size_t s); 121 void *operator new (size_t s);
88 void operator delete (void *p, size_t s); 122 void operator delete (void *p, size_t s);
89}; 123};
90 124
91/* simplevec taken (and heavily modified), from: 125/* simplevec taken (and heavily modified), from:
92 * 126 *
93 * MICO --- a free CORBA implementation 127 * MICO --- a free CORBA implementation
94 * Copyright (C) 1997-98 Kay Roemer & Arno Puder 128 * Copyright (C) 1997-98 Kay Roemer & Arno Puder
95 */ 129 */
96template<class T> 130template<class T>
97struct simplevec { 131struct simplevec
132{
98 typedef T* iterator; 133 typedef T* iterator;
99 typedef const T* const_iterator; 134 typedef const T* const_iterator;
100 typedef unsigned long size_type; 135 typedef unsigned long size_type;
101 136
102private: 137private:
… …
343} 378}
344 379
345 380
346template<typename T> 381template<typename T>
347struct vector : simplevec<T> 382struct vector : simplevec<T>
348{ }; 383{
384};
385
386struct stringvec : simplevec<char *>
387{
388 ~stringvec ()
389 {
390 for (char **c = begin (); c != end (); c++)
391 free (*c);
392 }
393};
349 394
350#if 0 395#if 0
351template<typename T> 396template<typename T>
352struct rxvt_vec : simplevec<void *> { 397struct rxvt_vec : simplevec<void *>
398{
353 typedef T *iterator; 399 typedef T *iterator;
354 400
355 void push_back (T d) { simplevec<void *>::push_back ((void *)d); } 401 void push_back (T d) { simplevec<void *>::push_back ((void *)d); }
356 T pop_back () { return (T*)simplevec<void *>::pop_back (); } 402 T pop_back () { return (T*)simplevec<void *>::pop_back (); }
357 void erase (int i) { erase (begin () + i); } 403 void erase (int i) { erase (begin () + i); }
… …
361 T &operator [] (int i) { return * (T *) (& ((* (simplevec<void *> *)this)[i])); } 407 T &operator [] (int i) { return * (T *) (& ((* (simplevec<void *> *)this)[i])); }
362 const T &operator [] (int i) const { return * (const T *) (& ((* (const simplevec<void *> *)this)[i])); } 408 const T &operator [] (int i) const { return * (const T *) (& ((* (const simplevec<void *> *)this)[i])); }
363}; 409};
364#endif 410#endif
365 411
366template <typename I, typename T>
367I find (I first, I last, const T& value)
368{
369 while (first != last && *first != value)
370 ++first;
371
372 return first;
373}
374
375template<typename T> 412template<typename T>
376struct auto_ptr { 413struct auto_ptr
414{
377 T *p; 415 T *p;
378 416
379 auto_ptr () : p (0) { } 417 auto_ptr () : p (0) { }
380 auto_ptr (T *a) : p (a) { } 418 auto_ptr (T *a) : p (a) { }
381 419
… …
430 } 468 }
431}; 469};
432 470
433typedef auto_ptr<char> auto_str; 471typedef auto_ptr<char> auto_str;
434 472
435struct stringvec : simplevec<char *>
436{
437 ~stringvec ()
438 {
439 for (char **c = begin (); c != end (); c++)
440 free (*c);
441 }
442};
443
444// return a very temporary (and never deallocated) buffer. keep small.
445void *rxvt_temp_buf (int len);
446
447template<typename T>
448static inline T *
449rxvt_temp_buf (int len)
450{
451 return (T *)rxvt_temp_buf (len * sizeof (T));
452}
453
454#endif 473#endif
455 474

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