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Comparing rxvt-unicode/src/rxvtutil.h (file contents):
Revision 1.29 by ayin, Wed Oct 31 09:55:24 2007 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 <cstdlib>
5#include <cstring> 5#include <cstring>
6#include <inttypes.h>
6 7
7using namespace std; 8using namespace std;
9
10#define ARRAY_LENGTH(v) (sizeof (v) / sizeof ((v)[0]))
8 11
9#define PP_CONCAT_(a, b) a ## b 12#define PP_CONCAT_(a, b) a ## b
10#define PP_CONCAT(a, b) PP_CONCAT_(a, b) 13#define PP_CONCAT(a, b) PP_CONCAT_(a, b)
11#define PP_STRINGIFY_(a) #a 14#define PP_STRINGIFY_(a) #a
12#define PP_STRINGIFY(a) PP_STRINGIFY_(a) 15#define PP_STRINGIFY(a) PP_STRINGIFY_(a)
13 16
14#define HAVE_GCC_BUILTINS (__GNUC__ >= 4 || (__GNUC__ == 3 && __GNUC_MINOR__ == 4)) 17#define HAVE_GCC_BUILTINS (__GNUC__ >= 4 || (__GNUC__ == 3 && __GNUC_MINOR__ == 4))
15 18
16#ifndef __attribute__
17# if __GNUC__ 19#if __GNUC__ >= 4
18# if (__GNUC__ == 2 && __GNUC_MINOR__ < 5) || (__GNUC__ < 2) 20# define rxvt_attribute(x) __attribute__(x)
19# define __attribute__(x) 21# define expect(expr,value) __builtin_expect ((expr),(value))
20# endif 22#else
21# endif
22# define __attribute__(x) 23# define rxvt_attribute(x)
24# define expect(expr,value) (expr)
23#endif 25#endif
24 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
25#define NORETURN __attribute__ ((noreturn)) 33#define NORETURN rxvt_attribute ((noreturn))
26#define UNUSED __attribute__ ((unused)) 34#define UNUSED rxvt_attribute ((unused))
27#define CONST __attribute__ ((const)) 35#define CONST rxvt_attribute ((const))
28 36
29// increases code size unless -fno-enforce-eh-specs 37// increases code size unless -fno-enforce-eh-specs
30#if __GNUC__ 38#if __GNUC__
31# define NOTHROW 39# define NOTHROW
32# define THROW(x) 40# define THROW(x)
33#else 41#else
34# define NOTHROW throw() 42# define NOTHROW throw()
35# define THROW(x) throw x 43# define THROW(x) throw x
36#endif 44#endif
37 45
38extern class byteorder { 46namespace byteorder {
39 static unsigned int e; // at least 32 bits 47 static unsigned char e ()
40public: 48 {
41 byteorder (); 49 const uint32_t u = 0x11223344;
50 return *(unsigned char *)u;
51 }
42 52
43 static bool big_endian () { return e == 0x11223344; }; 53 static bool big_endian () { return e () == 0x11; };
44 static bool network () { return e == 0x11223344; }; 54 static bool network () { return big_endian (); };
45 static bool little_endian () { return e == 0x44332211; }; 55 static bool little_endian () { return e () == 0x44; };
46 static bool vax () { return e == 0x44332211; }; 56 static bool vax () { return little_endian (); };
47} byteorder; 57};
48 58
49// various utility functions 59// various utility functions
50template<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; }
51template<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; }
52template<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; }
… …
65T lerp (T a, U b, P p) 75T lerp (T a, U b, P p)
66{ 76{
67 return (long(a) * long(100 - p) + long(b) * long(p) + 50) / 100; 77 return (long(a) * long(100 - p) + long(b) * long(p) + 50) / 100;
68} 78}
69 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
70// some bit functions, xft fuck me plenty 99// some bit functions, xft fuck me plenty
71#if HAVE_GCC_BUILTINS 100#if HAVE_GCC_BUILTINS
101/* netbsd stupidly defines popcount itself and puts it into string.h */
72static inline int ctz (unsigned int x) CONST { return __builtin_ctz (x); } 102static inline int rxvt_ctz (unsigned int x) { return __builtin_ctz (x); }
73static inline int popcount (unsigned int x) CONST { return __builtin_popcount (x); } 103static inline int rxvt_popcount (unsigned int x) { return __builtin_popcount (x); }
74#else 104#else
75// count trailing zero bits and count # of one bits 105// count trailing zero bits and count # of one bits
76int ctz (unsigned int x) CONST; 106int rxvt_ctz (unsigned int x) CONST;
77int popcount (unsigned int x) CONST; 107int rxvt_popcount (unsigned int x) CONST;
78#endif 108#endif
79 109
80// in range including end 110// in range including end
81#define IN_RANGE_INC(val,beg,end) \ 111#define IN_RANGE_INC(val,beg,end) \
82 ((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))
83 113
84// in range excluding end 114// in range excluding end
85#define IN_RANGE_EXC(val,beg,end) \ 115#define IN_RANGE_EXC(val,beg,end) \
86 ((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))
87 117
118// for m >= -n, ensure remainder lies between 0..n-1
119#define MOD(m,n) (((m) + (n)) % (n))
120
88// makes dynamically allocated objects zero-initialised 121// makes dynamically allocated objects zero-initialised
89struct zero_initialized { 122struct zero_initialized
123{
90 void *operator new (size_t s); 124 void *operator new (size_t s);
91 void operator delete (void *p, size_t s); 125 void operator delete (void *p, size_t s);
92}; 126};
93 127
94/* simplevec taken (and heavily modified), from: 128/* simplevec taken (and heavily modified), from:
95 * 129 *
96 * MICO --- a free CORBA implementation 130 * MICO --- a free CORBA implementation
97 * Copyright (C) 1997-98 Kay Roemer & Arno Puder 131 * Copyright (C) 1997-98 Kay Roemer & Arno Puder
98 */ 132 */
99template<class T> 133template<class T>
100struct simplevec { 134struct simplevec
135{
101 typedef T* iterator; 136 typedef T* iterator;
102 typedef const T* const_iterator; 137 typedef const T* const_iterator;
103 typedef unsigned long size_type; 138 typedef unsigned long size_type;
104 139
105private: 140private:
… …
346} 381}
347 382
348 383
349template<typename T> 384template<typename T>
350struct vector : simplevec<T> 385struct vector : simplevec<T>
351{ }; 386{
387};
388
389struct stringvec : simplevec<char *>
390{
391 ~stringvec ()
392 {
393 for (char **c = begin (); c != end (); c++)
394 free (*c);
395 }
396};
352 397
353#if 0 398#if 0
354template<typename T> 399template<typename T>
355struct rxvt_vec : simplevec<void *> { 400struct rxvt_vec : simplevec<void *>
401{
356 typedef T *iterator; 402 typedef T *iterator;
357 403
358 void push_back (T d) { simplevec<void *>::push_back ((void *)d); } 404 void push_back (T d) { simplevec<void *>::push_back ((void *)d); }
359 T pop_back () { return (T*)simplevec<void *>::pop_back (); } 405 T pop_back () { return (T*)simplevec<void *>::pop_back (); }
360 void erase (int i) { erase (begin () + i); } 406 void erase (int i) { erase (begin () + i); }
… …
364 T &operator [] (int i) { return * (T *) (& ((* (simplevec<void *> *)this)[i])); } 410 T &operator [] (int i) { return * (T *) (& ((* (simplevec<void *> *)this)[i])); }
365 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])); }
366}; 412};
367#endif 413#endif
368 414
369template <typename I, typename T>
370I find (I first, I last, const T& value)
371{
372 while (first != last && *first != value)
373 ++first;
374
375 return first;
376}
377
378template<typename T> 415template<typename T>
379struct auto_ptr { 416struct auto_ptr
417{
380 T *p; 418 T *p;
381 419
382 auto_ptr () : p (0) { } 420 auto_ptr () : p (0) { }
383 auto_ptr (T *a) : p (a) { } 421 auto_ptr (T *a) : p (a) { }
384 422
… …
433 } 471 }
434}; 472};
435 473
436typedef auto_ptr<char> auto_str; 474typedef auto_ptr<char> auto_str;
437 475
438struct stringvec : simplevec<char *>
439{
440 ~stringvec ()
441 {
442 for (char **c = begin (); c != end (); c++)
443 free (*c);
444 }
445};
446
447// return a very temporary (and never deallocated) buffer. keep small.
448void *rxvt_temp_buf (int len);
449
450template<typename T>
451static inline T *
452rxvt_temp_buf (int len)
453{
454 return (T *)rxvt_temp_buf (len * sizeof (T));
455}
456
457#endif 476#endif
458 477

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