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/cvs/rxvt-unicode/src/rxvtutil.h
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Comparing rxvt-unicode/src/rxvtutil.h (file contents):
Revision 1.15 by root, Mon Jan 2 15:35:43 2006 UTC vs.
Revision 1.27 by root, Fri Jun 23 14:31:38 2006 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// actually, some gcc-3.x versions work, too
15#define HAVE_GCC_BUILTINS (__GNUC__ >= 4)
16
17#ifndef __attribute__
18# if __GNUC__
19# if (__GNUC__ == 2 && __GNUC_MINOR__ < 5) || (__GNUC__ < 2)
20# define __attribute__(x)
21# endif
22# endif
23# define __attribute__(x)
24#endif
25
26#define NORETURN __attribute__ ((noreturn))
27#define UNUSED __attribute__ ((unused))
28#define CONST __attribute__ ((const))
29
30// increases code size unless -fno-enforce-eh-specs
31#if __GNUC__
32# define NOTHROW
33# define THROW(x)
34#else
35# define NOTHROW throw()
36# define THROW(x) throw x
37#endif
10 38
11extern class byteorder { 39extern class byteorder {
12 static unsigned int e; // at least 32 bits 40 static unsigned int e; // at least 32 bits
13public: 41public:
14 byteorder (); 42 byteorder ();
… …
17 static bool network () { return e == 0x11223344; }; 45 static bool network () { return e == 0x11223344; };
18 static bool little_endian () { return e == 0x44332211; }; 46 static bool little_endian () { return e == 0x44332211; };
19 static bool vax () { return e == 0x44332211; }; 47 static bool vax () { return e == 0x44332211; };
20} byteorder; 48} byteorder;
21 49
50// various utility functions
22template<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 T min (T a, U b) { return a < (T)b ? a : (T)b; }
23template<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 void min_it (T &a, U b) { a = a < (T)b ? a : (T)b; }
24template<typename T, typename U> static inline T max (T a, U b) { return a > (T)b ? a : (T)b; } 53template<typename T, typename U> static inline T max (T a, U b) { return a > (T)b ? a : (T)b; }
25template<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> static inline void max_it (T &a, U b) { a = a > (T)b ? a : (T)b; }
26 55
27template<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; } 56template<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; }
28template<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; } 57template<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; }
29 58
30template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; } 59template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; }
31 60
61template<typename T> static inline T squared_diff (T a, T b) { return (a-b)*(a-b); }
62
63// linear interpolation
64template<typename T, typename U, typename P>
65static inline
66T lerp (T a, U b, P p)
67{
68 return (long(a) * long(100 - p) + long(b) * long(p) + 50) / 100;
69}
70
71// some bit functions, xft fuck me plenty
72#if HAVE_GCC_BUILTINS
73static inline int ctz (unsigned int x) CONST { return __builtin_ctz (x); }
74static inline int popcount (unsigned int x) CONST { return __builtin_popcount (x); }
75#else
76// count trailing zero bits and count # of one bits
77int ctz (unsigned int x) CONST;
78int popcount (unsigned int x) CONST;
79#endif
80
32// in range including end 81// in range including end
33#define IN_RANGE_INC(val,beg,end) \ 82#define IN_RANGE_INC(val,beg,end) \
34 ((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg)) 83 ((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg))
35 84
36// in range excluding end 85// in range excluding end
37#define IN_RANGE_EXC(val,beg,end) \ 86#define IN_RANGE_EXC(val,beg,end) \
38 ((unsigned int)(val) - (unsigned int)(beg) < (unsigned int)(end) - (unsigned int)(beg)) 87 ((unsigned int)(val) - (unsigned int)(beg) < (unsigned int)(end) - (unsigned int)(beg))
39 88
89// makes dynamically allocated objects zero-initialised
40struct zero_initialized { 90struct zero_initialized {
41 void *operator new (size_t s); 91 void *operator new (size_t s);
42 void operator delete (void *p, size_t s); 92 void operator delete (void *p, size_t s);
43}; 93};
44 94
… …
254 return pos; 304 return pos;
255 } 305 }
256 void erase (iterator first, iterator last) 306 void erase (iterator first, iterator last)
257 { 307 {
258 if (last != first) { 308 if (last != first) {
259 memmove (first, last, (end ()-last)*sizeof (T)); 309 memmove (first, last, (end () - last) * sizeof (T));
260 _last -= last - first; 310 _last -= last - first;
261 } 311 }
262 } 312 }
263 void erase (iterator pos) 313 void erase (iterator pos)
264 { 314 {
265 if (pos != end ()) { 315 if (pos != end ()) {
266 memmove (pos, pos+1, (end ()- (pos+1))*sizeof (T)); 316 memmove (pos, pos+1, (end () - (pos+1)) * sizeof (T));
267 --_last; 317 --_last;
268 } 318 }
269 } 319 }
270 void swap (simplevec<T> &t) 320 void swap (simplevec<T> &t)
271 { 321 {
… …
389struct stringvec : simplevec<char *> 439struct stringvec : simplevec<char *>
390{ 440{
391 ~stringvec () 441 ~stringvec ()
392 { 442 {
393 for (char **c = begin (); c != end (); c++) 443 for (char **c = begin (); c != end (); c++)
394 delete [] *c; 444 free (*c);
395 } 445 }
396}; 446};
397 447
448// return a very temporary (and never deallocated) buffer. keep small.
449void *rxvt_temp_buf (int len);
450
451template<typename T>
452static inline T *
453rxvt_temp_buf (int len)
454{
455 return (T *)rxvt_temp_buf (len * sizeof (T));
456}
457
398#endif 458#endif
399 459

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