ViewVC Help
View File | Revision Log | Show Annotations | Download File
/cvs/rxvt-unicode/src/rxvtutil.h
(Generate patch)

Comparing rxvt-unicode/src/rxvtutil.h (file contents):
Revision 1.24 by root, Mon Jan 30 16:12:58 2006 UTC vs.
Revision 1.48 by root, Thu Jan 19 17:10:51 2012 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 <stdlib.h>
5#include <cstring> 5#include <string.h>
6 6#include "ecb.h"
7#define PP_CONCAT_(a, b) a ## b
8#define PP_CONCAT(a, b) PP_CONCAT_(a, b)
9#define PP_STRINGIFY_(a) #a
10#define PP_STRINGIFY(a) PP_STRINGIFY_(a)
11
12// actually, some gcc-3.x versions work, too
13#define HAVE_GCC_BUILTINS (__GNUC__ >= 4)
14
15#ifndef __attribute__
16# if __GNUC__
17# if (__GNUC__ == 2 && __GNUC_MINOR__ < 5) || (__GNUC__ < 2)
18# define __attribute__(x)
19# endif
20# endif
21# define __attribute__(x)
22#endif
23
24#define NORETURN __attribute__ ((noreturn))
25#define UNUSED __attribute__ ((unused))
26#define CONST __attribute__ ((const))
27 7
28// increases code size unless -fno-enforce-eh-specs 8// increases code size unless -fno-enforce-eh-specs
29#if __GNUC__ 9#if __GNUC__
30# define NOTHROW 10# define NOTHROW
31# define THROW(x) 11# define THROW(x)
32#else 12#else
33# define NOTHROW throw() 13# define NOTHROW throw()
34# define THROW(x) throw x 14# define THROW(x) throw x
35#endif 15#endif
36 16
37extern class byteorder {
38 static unsigned int e; // at least 32 bits
39public:
40 byteorder ();
41
42 static bool big_endian () { return e == 0x11223344; };
43 static bool network () { return e == 0x11223344; };
44 static bool little_endian () { return e == 0x44332211; };
45 static bool vax () { return e == 0x44332211; };
46} byteorder;
47
48// various utility functions 17// various utility functions
49template<typename T, typename U> static inline T min (T a, U b) { return a < (T)b ? a : (T)b; } 18template<typename T, typename U> static inline T min (T a, U b) { return a < (T)b ? a : (T)b; }
50template<typename T, typename U> static inline void min_it (T &a, U b) { a = a < (T)b ? a : (T)b; } 19template<typename T, typename U> static inline void min_it (T &a, U b) { a = a < (T)b ? a : (T)b; }
51template<typename T, typename U> static inline T max (T a, U b) { return a > (T)b ? a : (T)b; } 20template<typename T, typename U> static inline T max (T a, U b) { return a > (T)b ? a : (T)b; }
52template<typename T, typename U> static inline void max_it (T &a, U b) { a = a > (T)b ? a : (T)b; } 21template<typename T, typename U> static inline void max_it (T &a, U b) { a = a > (T)b ? a : (T)b; }
… …
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; } 23template<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; } 24template<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 25
57template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; } 26template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; }
58 27
28template<typename T> static inline T squared_diff (T a, T b) { return (a-b)*(a-b); }
29
59// linear interpolation 30// linear interpolation
60template<typename T, typename U, typename P> 31template<typename T, typename U, typename P>
61static inline 32static inline
62T lerp (T a, U b, P p) 33T lerp (T a, U b, P p)
63{ 34{
64 return (int(a) * int(p) + int(b) * int(100 - p)) / 100; 35 return (long(a) * long(100 - p) + long(b) * long(p) + 50) / 100;
65} 36}
66 37
67// some bit functions, xft fuck me plenty 38template <typename I, typename T>
68#if HAVE_GCC_BUILTINS 39I find (I first, I last, const T& value)
69static inline int ctz (unsigned int x) CONST { return __builtin_ctz (x); } 40{
70static inline int popcount (unsigned int x) CONST { return __builtin_popcount (x); } 41 while (first != last && *first != value)
71#else 42 ++first;
72// count trailing zero bits and count # of one bits 43
73int ctz (unsigned int x) CONST; 44 return first;
74int popcount (unsigned int x) CONST; 45}
75#endif 46
47// return a very temporary (and never deallocated) buffer. keep small.
48void *rxvt_temp_buf (int len);
49
50template<typename T>
51static inline T *
52rxvt_temp_buf (int len)
53{
54 return (T *)rxvt_temp_buf (len * sizeof (T));
55}
76 56
77// in range including end 57// in range including end
78#define IN_RANGE_INC(val,beg,end) \ 58#define IN_RANGE_INC(val,beg,end) \
79 ((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg)) 59 ((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg))
80 60
81// in range excluding end 61// in range excluding end
82#define IN_RANGE_EXC(val,beg,end) \ 62#define IN_RANGE_EXC(val,beg,end) \
83 ((unsigned int)(val) - (unsigned int)(beg) < (unsigned int)(end) - (unsigned int)(beg)) 63 ((unsigned int)(val) - (unsigned int)(beg) < (unsigned int)(end) - (unsigned int)(beg))
84 64
65// for m >= -n, ensure remainder lies between 0..n-1
66#define MOD(m,n) (((m) + (n)) % (n))
67
85// makes dynamically allocated objects zero-initialised 68// makes dynamically allocated objects zero-initialised
86struct zero_initialized { 69struct zero_initialized
70{
87 void *operator new (size_t s); 71 void *operator new (size_t s);
88 void operator delete (void *p, size_t s); 72 void operator delete (void *p, size_t s);
89}; 73};
90 74
91/* simplevec taken (and heavily modified), from: 75/* simplevec taken (and heavily modified), from:
92 * 76 *
93 * MICO --- a free CORBA implementation 77 * MICO --- a free CORBA implementation
94 * Copyright (C) 1997-98 Kay Roemer & Arno Puder 78 * Copyright (C) 1997-98 Kay Roemer & Arno Puder
95 */ 79 */
96template<class T> 80template<class T>
97struct simplevec { 81struct simplevec
82{
98 typedef T* iterator; 83 typedef T* iterator;
99 typedef const T* const_iterator; 84 typedef const T* const_iterator;
100 typedef unsigned long size_type; 85 typedef unsigned long size_type;
101 86
102private: 87private:
… …
343} 328}
344 329
345 330
346template<typename T> 331template<typename T>
347struct vector : simplevec<T> 332struct vector : simplevec<T>
348{ }; 333{
334};
335
336struct stringvec : simplevec<char *>
337{
338 ~stringvec ()
339 {
340 for (char **c = begin (); c != end (); c++)
341 free (*c);
342 }
343};
349 344
350#if 0 345#if 0
351template<typename T> 346template<typename T>
352struct rxvt_vec : simplevec<void *> { 347struct rxvt_vec : simplevec<void *>
348{
353 typedef T *iterator; 349 typedef T *iterator;
354 350
355 void push_back (T d) { simplevec<void *>::push_back ((void *)d); } 351 void push_back (T d) { simplevec<void *>::push_back ((void *)d); }
356 T pop_back () { return (T*)simplevec<void *>::pop_back (); } 352 T pop_back () { return (T*)simplevec<void *>::pop_back (); }
357 void erase (int i) { erase (begin () + i); } 353 void erase (int i) { erase (begin () + i); }
… …
361 T &operator [] (int i) { return * (T *) (& ((* (simplevec<void *> *)this)[i])); } 357 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])); } 358 const T &operator [] (int i) const { return * (const T *) (& ((* (const simplevec<void *> *)this)[i])); }
363}; 359};
364#endif 360#endif
365 361
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> 362template<typename T>
376struct auto_ptr { 363struct auto_ptr
364{
377 T *p; 365 T *p;
378 366
379 auto_ptr () : p (0) { } 367 auto_ptr () : p (0) { }
380 auto_ptr (T *a) : p (a) { } 368 auto_ptr (T *a) : p (a) { }
381 369
… …
430 } 418 }
431}; 419};
432 420
433typedef auto_ptr<char> auto_str; 421typedef auto_ptr<char> auto_str;
434 422
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 423#endif
455 424

Diff Legend

– Removed lines
+ Added lines
< Changed lines
> Changed lines