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/cvs/rxvt-unicode/src/rxvtutil.h
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Comparing rxvt-unicode/src/rxvtutil.h (file contents):
Revision 1.14 by root, Wed Dec 21 14:23:30 2005 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>
6
7#define PP_CONCAT_(a, b) a ## b
8#define PP_CONCAT(a, b) PP_CONCAT_(a, b)
9#define PP_STRINGIFY_(a) #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
5 36
6extern class byteorder { 37extern class byteorder {
7 static unsigned int e; // at least 32 bits 38 static unsigned int e; // at least 32 bits
8public: 39public:
9 byteorder (); 40 byteorder ();
… …
12 static bool network () { return e == 0x11223344; }; 43 static bool network () { return e == 0x11223344; };
13 static bool little_endian () { return e == 0x44332211; }; 44 static bool little_endian () { return e == 0x44332211; };
14 static bool vax () { return e == 0x44332211; }; 45 static bool vax () { return e == 0x44332211; };
15} byteorder; 46} byteorder;
16 47
48// various utility functions
17template<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; }
18template<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; }
19template<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; }
20template<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; }
21 53
22template<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; }
23template<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; }
24 56
25template<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; }
26 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
27// in range including end 79// in range including end
28#define IN_RANGE_INC(val,beg,end) \ 80#define IN_RANGE_INC(val,beg,end) \
29 ((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))
30 82
31// in range excluding end 83// in range excluding end
32#define IN_RANGE_EXC(val,beg,end) \ 84#define IN_RANGE_EXC(val,beg,end) \
33 ((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))
34 86
87// makes dynamically allocated objects zero-initialised
35struct zero_initialized { 88struct zero_initialized {
36 void *operator new (size_t s); 89 void *operator new (size_t s);
37 void operator delete (void *p, size_t s); 90 void operator delete (void *p, size_t s);
38}; 91};
39 92
… …
249 return pos; 302 return pos;
250 } 303 }
251 void erase (iterator first, iterator last) 304 void erase (iterator first, iterator last)
252 { 305 {
253 if (last != first) { 306 if (last != first) {
254 memmove (first, last, (end ()-last)*sizeof (T)); 307 memmove (first, last, (end () - last) * sizeof (T));
255 _last -= last - first; 308 _last -= last - first;
256 } 309 }
257 } 310 }
258 void erase (iterator pos) 311 void erase (iterator pos)
259 { 312 {
260 if (pos != end ()) { 313 if (pos != end ()) {
261 memmove (pos, pos+1, (end ()- (pos+1))*sizeof (T)); 314 memmove (pos, pos+1, (end () - (pos+1)) * sizeof (T));
262 --_last; 315 --_last;
263 } 316 }
264 } 317 }
265 void swap (simplevec<T> &t) 318 void swap (simplevec<T> &t)
266 { 319 {
… …
384struct stringvec : simplevec<char *> 437struct stringvec : simplevec<char *>
385{ 438{
386 ~stringvec () 439 ~stringvec ()
387 { 440 {
388 for (char **c = begin (); c != end (); c++) 441 for (char **c = begin (); c != end (); c++)
389 delete [] *c; 442 free (*c);
390 } 443 }
391}; 444};
392 445
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
393#endif 456#endif
394 457

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