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/cvs/rxvt-unicode/src/rxvtutil.h
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Comparing rxvt-unicode/src/rxvtutil.h (file contents):
Revision 1.9 by root, Sun Jun 26 19:59:29 2005 UTC vs.
Revision 1.38 by root, Wed Nov 5 14:43:54 2008 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
7using namespace std;
8
9#define PP_CONCAT_(a, b) a ## b
10#define PP_CONCAT(a, b) PP_CONCAT_(a, b)
11#define PP_STRINGIFY_(a) #a
12#define PP_STRINGIFY(a) PP_STRINGIFY_(a)
13
14#define HAVE_GCC_BUILTINS (__GNUC__ >= 4 || (__GNUC__ == 3 && __GNUC_MINOR__ == 4))
15
16#if __GNUC__ >= 4
17# define rxvt_attribute(x) __attribute__(x)
18# define expect(expr,value) __builtin_expect ((expr),(value))
19#else
20# define rxvt_attribute(x)
21# define expect(expr,value) (expr)
22#endif
23
24// put into ifs if you are very sure that the expression
25// is mostly true or mosty false. note that these return
26// booleans, not the expression.
27#define expect_false(expr) expect ((expr) != 0, 0)
28#define expect_true(expr) expect ((expr) != 0, 1)
29
30#define NORETURN rxvt_attribute ((noreturn))
31#define UNUSED rxvt_attribute ((unused))
32#define CONST rxvt_attribute ((const))
33
34// increases code size unless -fno-enforce-eh-specs
35#if __GNUC__
36# define NOTHROW
37# define THROW(x)
38#else
39# define NOTHROW throw()
40# define THROW(x) throw x
41#endif
5 42
6extern class byteorder { 43extern class byteorder {
7 static unsigned int e; // at least 32 bits 44 static unsigned int e; // at least 32 bits
8public: 45public:
9 byteorder (); 46 byteorder ();
… …
12 static bool network () { return e == 0x11223344; }; 49 static bool network () { return e == 0x11223344; };
13 static bool little_endian () { return e == 0x44332211; }; 50 static bool little_endian () { return e == 0x44332211; };
14 static bool vax () { return e == 0x44332211; }; 51 static bool vax () { return e == 0x44332211; };
15} byteorder; 52} byteorder;
16 53
54// various utility functions
55template<typename T, typename U> static inline T min (T a, U b) { return a < (T)b ? a : (T)b; }
56template<typename T, typename U> static inline void min_it (T &a, U b) { a = a < (T)b ? a : (T)b; }
57template<typename T, typename U> static inline T max (T a, U b) { return a > (T)b ? a : (T)b; }
58template<typename T, typename U> static inline void max_it (T &a, U b) { a = a > (T)b ? a : (T)b; }
59
60template<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; }
61template<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; }
62
63template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; }
64
65template<typename T> static inline T squared_diff (T a, T b) { return (a-b)*(a-b); }
66
67// linear interpolation
68template<typename T, typename U, typename P>
69static inline
70T lerp (T a, U b, P p)
71{
72 return (long(a) * long(100 - p) + long(b) * long(p) + 50) / 100;
73}
74
17template<typename T, typename U> 75template <typename I, typename T>
18static inline T min (T a, U b) { return a < b ? a : (T)b; } 76I find (I first, I last, const T& value)
19template<typename T, typename U> 77{
20static inline T max (T a, U b) { return a > b ? a : (T)b; } 78 while (first != last && *first != value)
79 ++first;
80
81 return first;
82}
83
84// return a very temporary (and never deallocated) buffer. keep small.
85void *rxvt_temp_buf (int len);
86
21template<typename T> 87template<typename T>
22static inline void swap (T& a, T& b) { T t=a; a=b; b=t; } 88static inline T *
89rxvt_temp_buf (int len)
90{
91 return (T *)rxvt_temp_buf (len * sizeof (T));
92}
23 93
94// some bit functions, xft fuck me plenty
95#if HAVE_GCC_BUILTINS
96static inline int ctz (unsigned int x) { return __builtin_ctz (x); }
97static inline int popcount (unsigned int x) { return __builtin_popcount (x); }
98#else
99// count trailing zero bits and count # of one bits
100int ctz (unsigned int x) CONST;
101int popcount (unsigned int x) CONST;
102#endif
103
104// in range including end
24#define IN_RANGE(val,beg,end) \ 105#define IN_RANGE_INC(val,beg,end) \
25 ((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg)) 106 ((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg))
26 107
108// in range excluding end
109#define IN_RANGE_EXC(val,beg,end) \
110 ((unsigned int)(val) - (unsigned int)(beg) < (unsigned int)(end) - (unsigned int)(beg))
111
112// for m >= -n, ensure remainder lies between 0..n-1
113#define MOD(m,n) (((m) + (n)) % (n))
114
115// makes dynamically allocated objects zero-initialised
27struct zero_initialized { 116struct zero_initialized
117{
28 void *operator new (size_t s); 118 void *operator new (size_t s);
29 void operator delete (void *p, size_t s); 119 void operator delete (void *p, size_t s);
30}; 120};
31 121
32/* simplevec taken (and heavily modified), from: 122/* simplevec taken (and heavily modified), from:
33 * 123 *
34 * MICO --- a free CORBA implementation 124 * MICO --- a free CORBA implementation
35 * Copyright (C) 1997-98 Kay Roemer & Arno Puder 125 * Copyright (C) 1997-98 Kay Roemer & Arno Puder
36 */ 126 */
37template<class T> 127template<class T>
38struct simplevec { 128struct simplevec
129{
39 typedef T* iterator; 130 typedef T* iterator;
40 typedef const T* const_iterator; 131 typedef const T* const_iterator;
41 typedef unsigned long size_type; 132 typedef unsigned long size_type;
42 133
43private: 134private:
… …
241 return pos; 332 return pos;
242 } 333 }
243 void erase (iterator first, iterator last) 334 void erase (iterator first, iterator last)
244 { 335 {
245 if (last != first) { 336 if (last != first) {
246 memmove (first, last, (end ()-last)*sizeof (T)); 337 memmove (first, last, (end () - last) * sizeof (T));
247 _last -= last - first; 338 _last -= last - first;
248 } 339 }
249 } 340 }
250 void erase (iterator pos) 341 void erase (iterator pos)
251 { 342 {
252 if (pos != end ()) { 343 if (pos != end ()) {
253 memmove (pos, pos+1, (end ()- (pos+1))*sizeof (T)); 344 memmove (pos, pos+1, (end () - (pos+1)) * sizeof (T));
254 --_last; 345 --_last;
255 } 346 }
256 } 347 }
257 void swap (simplevec<T> &t) 348 void swap (simplevec<T> &t)
258 { 349 {
… …
284} 375}
285 376
286 377
287template<typename T> 378template<typename T>
288struct vector : simplevec<T> 379struct vector : simplevec<T>
289{ }; 380{
381};
382
383struct stringvec : simplevec<char *>
384{
385 ~stringvec ()
386 {
387 for (char **c = begin (); c != end (); c++)
388 free (*c);
389 }
390};
290 391
291#if 0 392#if 0
292template<typename T> 393template<typename T>
293struct rxvt_vec : simplevec<void *> { 394struct rxvt_vec : simplevec<void *>
395{
294 typedef T *iterator; 396 typedef T *iterator;
295 397
296 void push_back (T d) { simplevec<void *>::push_back ((void *)d); } 398 void push_back (T d) { simplevec<void *>::push_back ((void *)d); }
297 T pop_back () { return (T*)simplevec<void *>::pop_back (); } 399 T pop_back () { return (T*)simplevec<void *>::pop_back (); }
298 void erase (int i) { erase (begin () + i); } 400 void erase (int i) { erase (begin () + i); }
… …
302 T &operator [] (int i) { return * (T *) (& ((* (simplevec<void *> *)this)[i])); } 404 T &operator [] (int i) { return * (T *) (& ((* (simplevec<void *> *)this)[i])); }
303 const T &operator [] (int i) const { return * (const T *) (& ((* (const simplevec<void *> *)this)[i])); } 405 const T &operator [] (int i) const { return * (const T *) (& ((* (const simplevec<void *> *)this)[i])); }
304}; 406};
305#endif 407#endif
306 408
307template <typename I, typename T>
308I find (I first, I last, const T& value)
309{
310 while (first != last && *first != value)
311 ++first;
312
313 return first;
314}
315
316template<typename T> 409template<typename T>
317struct auto_ptr { 410struct auto_ptr
411{
318 T *p; 412 T *p;
319 413
320 auto_ptr () : p (0) { } 414 auto_ptr () : p (0) { }
321 auto_ptr (T *a) : p (a) { } 415 auto_ptr (T *a) : p (a) { }
322 416
… …
371 } 465 }
372}; 466};
373 467
374typedef auto_ptr<char> auto_str; 468typedef auto_ptr<char> auto_str;
375 469
376struct stringvec : simplevec<char *>
377{
378 ~stringvec ()
379 {
380 for (char **c = begin (); c != end (); c++)
381 delete [] *c;
382 }
383};
384
385#endif 470#endif
386 471

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