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/cvs/rxvt-unicode/src/rxvtutil.h
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Comparing rxvt-unicode/src/rxvtutil.h (file contents):
Revision 1.16 by root, Wed Jan 11 00:59:58 2006 UTC vs.
Revision 1.31 by root, Thu Nov 22 15:32:39 2007 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;
5 8
6#define PP_CONCAT_(a, b) a ## b 9#define PP_CONCAT_(a, b) a ## b
7#define PP_CONCAT(a, b) PP_CONCAT_(a, b) 10#define PP_CONCAT(a, b) PP_CONCAT_(a, b)
8#define PP_STRINGIFY_(a) #a 11#define PP_STRINGIFY_(a) #a
9#define PP_STRINGIFY(a) PP_STRINGIFY_(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#else
19# define rxvt_attribute(x)
20#endif
21
22#define NORETURN rxvt_attribute ((noreturn))
23#define UNUSED rxvt_attribute ((unused))
24#define CONST rxvt_attribute ((const))
25
26// increases code size unless -fno-enforce-eh-specs
27#if __GNUC__
28# define NOTHROW
29# define THROW(x)
30#else
31# define NOTHROW throw()
32# define THROW(x) throw x
33#endif
10 34
11extern class byteorder { 35extern class byteorder {
12 static unsigned int e; // at least 32 bits 36 static unsigned int e; // at least 32 bits
13public: 37public:
14 byteorder (); 38 byteorder ();
… …
28template<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; } 52template<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; }
29template<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; } 53template<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; }
30 54
31template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; } 55template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; }
32 56
57template<typename T> static inline T squared_diff (T a, T b) { return (a-b)*(a-b); }
58
59// linear interpolation
60template<typename T, typename U, typename P>
61static inline
62T lerp (T a, U b, P p)
63{
64 return (long(a) * long(100 - p) + long(b) * long(p) + 50) / 100;
65}
66
67// some bit functions, xft fuck me plenty
68#if HAVE_GCC_BUILTINS
69static inline int ctz (unsigned int x) { return __builtin_ctz (x); }
70static inline int popcount (unsigned int x) { return __builtin_popcount (x); }
71#else
72// count trailing zero bits and count # of one bits
73int ctz (unsigned int x) CONST;
74int popcount (unsigned int x) CONST;
75#endif
76
33// in range including end 77// in range including end
34#define IN_RANGE_INC(val,beg,end) \ 78#define IN_RANGE_INC(val,beg,end) \
35 ((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg)) 79 ((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg))
36 80
37// in range excluding end 81// in range excluding end
… …
43 void *operator new (size_t s); 87 void *operator new (size_t s);
44 void operator delete (void *p, size_t s); 88 void operator delete (void *p, size_t s);
45}; 89};
46 90
47/* simplevec taken (and heavily modified), from: 91/* simplevec taken (and heavily modified), from:
48 * 92 *
49 * MICO --- a free CORBA implementation 93 * MICO --- a free CORBA implementation
50 * Copyright (C) 1997-98 Kay Roemer & Arno Puder 94 * Copyright (C) 1997-98 Kay Roemer & Arno Puder
51 */ 95 */
52template<class T> 96template<class T>
53struct simplevec { 97struct simplevec {
… …
256 return pos; 300 return pos;
257 } 301 }
258 void erase (iterator first, iterator last) 302 void erase (iterator first, iterator last)
259 { 303 {
260 if (last != first) { 304 if (last != first) {
261 memmove (first, last, (end ()-last)*sizeof (T)); 305 memmove (first, last, (end () - last) * sizeof (T));
262 _last -= last - first; 306 _last -= last - first;
263 } 307 }
264 } 308 }
265 void erase (iterator pos) 309 void erase (iterator pos)
266 { 310 {
267 if (pos != end ()) { 311 if (pos != end ()) {
268 memmove (pos, pos+1, (end ()- (pos+1))*sizeof (T)); 312 memmove (pos, pos+1, (end () - (pos+1)) * sizeof (T));
269 --_last; 313 --_last;
270 } 314 }
271 } 315 }
272 void swap (simplevec<T> &t) 316 void swap (simplevec<T> &t)
273 { 317 {
… …
391struct stringvec : simplevec<char *> 435struct stringvec : simplevec<char *>
392{ 436{
393 ~stringvec () 437 ~stringvec ()
394 { 438 {
395 for (char **c = begin (); c != end (); c++) 439 for (char **c = begin (); c != end (); c++)
396 delete [] *c; 440 free (*c);
397 } 441 }
398}; 442};
399 443
400// temporarily replace the process environment 444// return a very temporary (and never deallocated) buffer. keep small.
401extern char **environ; 445void *rxvt_temp_buf (int len);
402 446
403struct temp_environ 447template<typename T>
448static inline T *
449rxvt_temp_buf (int len)
404{ 450{
405 char **prev; 451 return (T *)rxvt_temp_buf (len * sizeof (T));
406 452}
407 temp_environ (const stringvec *envv)
408 : prev (environ)
409 {
410 if (envv)
411 environ = (char **)envv->begin ();
412 }
413
414 ~temp_environ ()
415 {
416 environ = prev;
417 }
418};
419 453
420#endif 454#endif
421 455

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