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Comparing deliantra/server/include/util.h (file contents):
Revision 1.91 by root, Thu Oct 15 21:09:32 2009 UTC vs.
Revision 1.94 by root, Sun Nov 8 16:13:45 2009 UTC

… …
21 */ 21 */
22 22
23#ifndef UTIL_H__ 23#ifndef UTIL_H__
24#define UTIL_H__ 24#define UTIL_H__
25 25
26#include <compiler.h>
27
26#define DEBUG_POISON 0x00 // poison memory before freeing it if != 0 28#define DEBUG_POISON 0x00 // poison memory before freeing it if != 0
27#define DEBUG_SALLOC 0 // add a debug wrapper around all sallocs 29#define DEBUG_SALLOC 0 // add a debug wrapper around all sallocs
28#define PREFER_MALLOC 0 // use malloc and not the slice allocator 30#define PREFER_MALLOC 0 // use malloc and not the slice allocator
29
30#if __GNUC__ >= 3
31# define is_constant(c) __builtin_constant_p (c)
32# define expect(expr,value) __builtin_expect ((expr),(value))
33# define prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
34# define noinline __attribute__((__noinline__))
35#else
36# define is_constant(c) 0
37# define expect(expr,value) (expr)
38# define prefetch(addr,rw,locality)
39# define noinline
40#endif
41
42#if __GNUC__ < 4 || (__GNUC__ == 4 || __GNUC_MINOR__ < 4)
43# define decltype(x) typeof(x)
44#endif
45
46// put into ifs if you are very sure that the expression
47// is mostly true or mosty false. note that these return
48// booleans, not the expression.
49#define expect_false(expr) expect ((expr) ? 1 : 0, 0)
50#define expect_true(expr) expect ((expr) ? 1 : 0, 1)
51 31
52#include <pthread.h> 32#include <pthread.h>
53 33
54#include <cstddef> 34#include <cstddef>
55#include <cmath> 35#include <cmath>
… …
206 int32_t d = b - a; 186 int32_t d = b - a;
207 d &= d >> 31; 187 d &= d >> 31;
208 return b - d; 188 return b - d;
209} 189}
210 190
211// this is much faster than crossfires original algorithm 191// this is much faster than crossfire's original algorithm
212// on modern cpus 192// on modern cpus
213inline int 193inline int
214isqrt (int n) 194isqrt (int n)
215{ 195{
216 return (int)sqrtf ((float)n); 196 return (int)sqrtf ((float)n);
197}
198
199// this is kind of like the ^^ operator, if it would exist, without sequence point.
200// more handy than it looks like, due to the implicit !! done on its arguments
201inline bool
202logical_xor (bool a, bool b)
203{
204 return a != b;
205}
206
207inline bool
208logical_implies (bool a, bool b)
209{
210 return a <= b;
217} 211}
218 212
219// this is only twice as fast as naive sqrtf (dx*dy+dy*dy) 213// this is only twice as fast as naive sqrtf (dx*dy+dy*dy)
220#if 0 214#if 0
221// and has a max. error of 6 in the range -100..+100. 215// and has a max. error of 6 in the range -100..+100.
… …
708 702
709int similar_direction (int a, int b); 703int similar_direction (int a, int b);
710 704
711// like v?sprintf, but returns a "static" buffer 705// like v?sprintf, but returns a "static" buffer
712char *vformat (const char *format, va_list ap); 706char *vformat (const char *format, va_list ap);
713char *format (const char *format, ...); 707char *format (const char *format, ...) attribute ((format (printf, 1, 2)));
714 708
715// safety-check player input which will become object->msg 709// safety-check player input which will become object->msg
716bool msg_is_safe (const char *msg); 710bool msg_is_safe (const char *msg);
717 711
718///////////////////////////////////////////////////////////////////////////// 712/////////////////////////////////////////////////////////////////////////////

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