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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 1.25 by root, Mon Jan 30 19:46:13 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>
5 6
6#define PP_CONCAT_(a, b) a ## b 7#define PP_CONCAT_(a, b) a ## b
7#define PP_CONCAT(a, b) PP_CONCAT_(a, b) 8#define PP_CONCAT(a, b) PP_CONCAT_(a, b)
8#define PP_STRINGIFY_(a) #a 9#define PP_STRINGIFY_(a) #a
9#define PP_STRINGIFY(a) PP_STRINGIFY_(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
28// increases code size unless -fno-enforce-eh-specs
29#if __GNUC__
30# define NOTHROW
31# define THROW(x)
32#else
33# define NOTHROW throw()
34# define THROW(x) throw x
35#endif
10 36
11extern class byteorder { 37extern class byteorder {
12 static unsigned int e; // at least 32 bits 38 static unsigned int e; // at least 32 bits
13public: 39public:
14 byteorder (); 40 byteorder ();
… …
17 static bool network () { return e == 0x11223344; }; 43 static bool network () { return e == 0x11223344; };
18 static bool little_endian () { return e == 0x44332211; }; 44 static bool little_endian () { return e == 0x44332211; };
19 static bool vax () { return e == 0x44332211; }; 45 static bool vax () { return e == 0x44332211; };
20} byteorder; 46} byteorder;
21 47
48// various utility functions
22template<typename T, typename U> static inline T min (T a, U b) { return a < (T)b ? a : (T)b; } 49template<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; } 50template<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; } 51template<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; } 52template<typename T, typename U> static inline void max_it (T &a, U b) { a = a > (T)b ? a : (T)b; }
26 53
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; } 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; }
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; } 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; }
29 56
30template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; } 57template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; }
31 58
59template<typename T> static inline T squared_diff (T a, T b) { return (a-b)*(a-b); }
60
61// linear interpolation
62template<typename T, typename U, typename P>
63static inline
64T lerp (T a, U b, P p)
65{
66 return (int(a) * int(p) + int(b) * int(100 - p)) / 100;
67}
68
69// some bit functions, xft fuck me plenty
70#if HAVE_GCC_BUILTINS
71static inline int ctz (unsigned int x) CONST { return __builtin_ctz (x); }
72static inline int popcount (unsigned int x) CONST { return __builtin_popcount (x); }
73#else
74// count trailing zero bits and count # of one bits
75int ctz (unsigned int x) CONST;
76int popcount (unsigned int x) CONST;
77#endif
78
32// in range including end 79// in range including end
33#define IN_RANGE_INC(val,beg,end) \ 80#define IN_RANGE_INC(val,beg,end) \
34 ((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg)) 81 ((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg))
35 82
36// in range excluding end 83// in range excluding end
37#define IN_RANGE_EXC(val,beg,end) \ 84#define IN_RANGE_EXC(val,beg,end) \
38 ((unsigned int)(val) - (unsigned int)(beg) < (unsigned int)(end) - (unsigned int)(beg)) 85 ((unsigned int)(val) - (unsigned int)(beg) < (unsigned int)(end) - (unsigned int)(beg))
39 86
87// makes dynamically allocated objects zero-initialised
40struct zero_initialized { 88struct zero_initialized {
41 void *operator new (size_t s); 89 void *operator new (size_t s);
42 void operator delete (void *p, size_t s); 90 void operator delete (void *p, size_t s);
43}; 91};
44 92
… …
254 return pos; 302 return pos;
255 } 303 }
256 void erase (iterator first, iterator last) 304 void erase (iterator first, iterator last)
257 { 305 {
258 if (last != first) { 306 if (last != first) {
259 memmove (first, last, (end ()-last)*sizeof (T)); 307 memmove (first, last, (end () - last) * sizeof (T));
260 _last -= last - first; 308 _last -= last - first;
261 } 309 }
262 } 310 }
263 void erase (iterator pos) 311 void erase (iterator pos)
264 { 312 {
265 if (pos != end ()) { 313 if (pos != end ()) {
266 memmove (pos, pos+1, (end ()- (pos+1))*sizeof (T)); 314 memmove (pos, pos+1, (end () - (pos+1)) * sizeof (T));
267 --_last; 315 --_last;
268 } 316 }
269 } 317 }
270 void swap (simplevec<T> &t) 318 void swap (simplevec<T> &t)
271 { 319 {
… …
389struct stringvec : simplevec<char *> 437struct stringvec : simplevec<char *>
390{ 438{
391 ~stringvec () 439 ~stringvec ()
392 { 440 {
393 for (char **c = begin (); c != end (); c++) 441 for (char **c = begin (); c != end (); c++)
394 delete [] *c; 442 free (*c);
395 } 443 }
396}; 444};
397 445
446// return a very temporary (and never deallocated) buffer. keep small.
447void *rxvt_temp_buf (int len);
448
449template<typename T>
450static inline T *
451rxvt_temp_buf (int len)
452{
453 return (T *)rxvt_temp_buf (len * sizeof (T));
454}
455
398#endif 456#endif
399 457

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