[ViewVC] Diff of: cvs/deliantra/server/common/utils.C

Comparing deliantra/server/common/utils.C (file contents):
Revision 1.31 by root, Mon Dec 25 14:54:44 2006 UTC vs.
Revision 1.52 by root, Fri Apr 27 14:41:37 2007 UTC

…		…
1	/*	1	/*
2	CrossFire, A Multiplayer game for X-windows	2	* CrossFire, A Multiplayer game for X-windows
3		3	*
		4	* Copyright (C) 2005, 2006, 2007 Marc Lehmann & Crossfire+ Development Team
4	Copyright (C) 2002 Mark Wedel & Crossfire Development Team	5	* Copyright (C) 2002 Mark Wedel & Crossfire Development Team
5	Copyright (C) 1992 Frank Tore Johansen	6	* Copyright (C) 1992 Frank Tore Johansen
6		7	*
7	This program is free software; you can redistribute it and/or modify	8	* This program is free software; you can redistribute it and/or modify
8	it under the terms of the GNU General Public License as published by	9	* it under the terms of the GNU General Public License as published by
9	the Free Software Foundation; either version 2 of the License, or	10	* the Free Software Foundation; either version 2 of the License, or
10	(at your option) any later version.	11	* (at your option) any later version.
11		12	*
12	This program is distributed in the hope that it will be useful,	13	* This program is distributed in the hope that it will be useful,
13	but WITHOUT ANY WARRANTY; without even the implied warranty of	14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
14	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the	15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15	GNU General Public License for more details.	16	* GNU General Public License for more details.
16		17	*
17	You should have received a copy of the GNU General Public License	18	* You should have received a copy of the GNU General Public License
18	along with this program; if not, write to the Free Software	19	* along with this program; if not, write to the Free Software
19	Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.	20	* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20		21	*
21	The authors can be reached via e-mail at <crossfire@schmorp.de>	22	* The authors can be reached via e-mail at <crossfire@schmorp.de>
22	*/	23	*/
23		24
24	/*	25	/*
25	* General convenience functions for crossfire.	26	* General convenience functions for crossfire.
26	*/	27	*/
		28
		29	#include <cstdlib>
		30	#include <sys/types.h>
		31	#include <unistd.h>
		32	#include <sys/time.h>
		33	#include <time.h>
		34	#include <signal.h>
27		35
28	#include <global.h>	36	#include <global.h>
29	#include <funcpoint.h>	37	#include <funcpoint.h>
30	#include <material.h>	38	#include <material.h>
31		39
32	#include <sys/time.h>
33	#include <time.h>
34	#include <glib.h>	40	#include <glib.h>
		41
		42	rand_gen rndm;
		43
		44	void
		45	tausworthe_random_generator::seed (uint32_t seed)
		46	{
		47	state [0] = seed * 69069U; if (state [0] < 2U) state [0] += 2U;
		48	state [1] = state [0] * 69069U; if (state [0] < 8U) state [0] += 8U;
		49	state [2] = state [1] * 69069U; if (state [0] < 16U) state [0] += 16U;
		50	state [3] = state [2] * 69069U; if (state [0] < 128) state [0] += 128U;
		51
		52	for (int i = 11; --i; )
		53	operator ()();
		54	}
		55
		56	uint32_t
		57	tausworthe_random_generator::next ()
		58	{
		59	state [0] = ((state [0] & 0xFFFFFFFEU) << 18U) ^ (((state [0] << 6U) ^ state [0]) >> 13U);
		60	state [1] = ((state [1] & 0xFFFFFFF8U) << 2U) ^ (((state [1] << 2U) ^ state [1]) >> 27U);
		61	state [2] = ((state [2] & 0xFFFFFFF0U) << 7U) ^ (((state [2] << 13U) ^ state [2]) >> 21U);
		62	state [3] = ((state [3] & 0xFFFFFF80U) << 13U) ^ (((state [3] << 3U) ^ state [3]) >> 12U);
		63
		64	return state [0] ^ state [1] ^ state [2] ^ state [3];
		65	}
		66
		67	uint32_t
		68	tausworthe_random_generator::get_range (uint32_t num)
		69	{
		70	return (next () * (uint64_t)num) >> 32U;
		71	}
		72
		73	// return a number within (min .. max)
		74	int
		75	tausworthe_random_generator::get_range (int r_min, int r_max)
		76	{
		77	return r_min + get_range (max (r_max - r_min + 1, 0));
		78	}
35		79
36	/*	80	/*
37	* The random functions here take luck into account when rolling random	81	* The random functions here take luck into account when rolling random
38	* dice or numbers. This function has less of an impact the larger the	82	* dice or numbers. This function has less of an impact the larger the
39	* difference becomes in the random numbers. IE, the effect is lessened	83	* difference becomes in the random numbers. IE, the effect is lessened
46	* Roll a random number between min and max. Uses op to determine luck,	90	* Roll a random number between min and max. Uses op to determine luck,
47	* and if goodbad is non-zero, luck increases the roll, if zero, it decreases.	91	* and if goodbad is non-zero, luck increases the roll, if zero, it decreases.
48	* Generally, op should be the player/caster/hitter requesting the roll,	92	* Generally, op should be the player/caster/hitter requesting the roll,
49	* not the recipient (ie, the poor slob getting hit). [garbled 20010916]	93	* not the recipient (ie, the poor slob getting hit). [garbled 20010916]
50	*/	94	*/
51
52	int	95	int
53	random_roll (int min, int max, const object *op, int goodbad)	96	random_roll (int r_min, int r_max, const object *op, int goodbad)
54	{	97	{
		98	int base = r_max - r_min > 1 ? 20 : 50; /* d2 and d3 are corner cases */
		99
		100	if (r_max < 1 \|\| r_max < r_min)
		101	{
		102	LOG (llevError, "Calling random_roll with min=%d max=%d\n", r_min, r_max);
		103	return r_min;
		104	}
		105
		106	if (op->type == PLAYER)
		107	{
		108	int luck = op->stats.luck;
		109
		110	if (rndm (base) < min (10, abs (luck)))
		111	{
		112	//TODO: take luck into account
		113	}
		114	}
		115
		116	return rndm (r_min, r_max);
		117	}
		118
		119	/*
		120	* This is a 64 bit version of random_roll above. This is needed
		121	* for exp loss calculations for players changing religions.
		122	*/
		123	sint64
		124	random_roll64 (sint64 min, sint64 max, const object *op, int goodbad)
		125	{
55	int omin, diff, luck, base, ran;	126	sint64 omin, diff, luck, ran;
		127	int base;
56		128
57	omin = min;	129	omin = min;
58	diff = max - min + 1;	130	diff = max - min + 1;
59	((diff > 2) ? (base = 20) : (base = 50)); /* d2 and d3 are corner cases */	131	((diff > 2) ? (base = 20) : (base = 50)); /* d2 and d3 are corner cases */
60		132
61	if (max < 1 \|\| diff < 1)	133	if (max < 1 \|\| diff < 1)
62	{	134	{
63	LOG (llevError, "Calling random_roll with min=%d max=%d\n", min, max);	135	LOG (llevError, "Calling random_roll with min=%" PRId64 " max=%" PRId64 "\n", min, max);
64	return (min); /* avoids a float exception */	136	return (min); /* avoids a float exception */
65	}	137	}
66		138
67	ran = RANDOM ();	139	/*
		140	* Make a call to get two 32 bit unsigned random numbers, and just to
		141	* a little bitshifting.
		142	*/
		143	ran = (sint64) rndm.next () ^ ((sint64) rndm.next () << 31);
68		144
69	if (op->type != PLAYER)	145	if (op->type != PLAYER)
70	return ((ran % diff) + min);	146	return ((ran % diff) + min);
71		147
72	luck = op->stats.luck;	148	luck = op->stats.luck;
73	if (RANDOM () % base < MIN (10, abs (luck)))	149	if (rndm (base) < MIN (10, abs (luck)))
74	{	150	{
75	/* we have a winner */	151	/* we have a winner */
76	((luck > 0) ? (luck = 1) : (luck = -1));	152	((luck > 0) ? (luck = 1) : (luck = -1));
77	diff -= luck;	153	diff -= luck;
78	if (diff < 1)	154	if (diff < 1)
79	return (omin); /check again /	155	return (omin); /check again /
80	((goodbad) ? (min += luck) : (diff));	156	((goodbad) ? (min += luck) : (diff));
81		157
82	return (MAX (omin, MIN (max, (ran % diff) + min)));	158	return (MAX (omin, MIN (max, (ran % diff) + min)));
83	}	159	}
84	return ((ran % diff) + min);
85	}
86		160
87	/*
88	* This is a 64 bit version of random_roll above. This is needed
89	* for exp loss calculations for players changing religions.
90	*/
91
92	sint64
93	random_roll64 (sint64 min, sint64 max, const object *op, int goodbad)
94	{
95	sint64 omin, diff, luck, ran;
96	int base;
97
98	omin = min;
99	diff = max - min + 1;
100	((diff > 2) ? (base = 20) : (base = 50)); /* d2 and d3 are corner cases */
101
102	if (max < 1 \|\| diff < 1)
103	{
104	LOG (llevError, "Calling random_roll with min=%" PRId64 " max=%" PRId64 "\n", min, max);
105	return (min); /* avoids a float exception */
106	}
107
108	/* Don't know of a portable call to get 64 bit random values.
109	* So make a call to get two 32 bit random numbers, and just to
110	* a little byteshifting. Do make sure the first one is only
111	* 32 bit, so we don't get skewed results
112	*/
113	ran = (RANDOM () & 0xffffffff) \| ((sint64) RANDOM () << 32);
114
115	if (op->type != PLAYER)
116	return ((ran % diff) + min);
117
118	luck = op->stats.luck;
119	if (RANDOM () % base < MIN (10, abs (luck)))
120	{
121	/* we have a winner */
122	((luck > 0) ? (luck = 1) : (luck = -1));
123	diff -= luck;
124	if (diff < 1)
125	return (omin); /check again /
126	((goodbad) ? (min += luck) : (diff));
127
128	return (MAX (omin, MIN (max, (ran % diff) + min)));
129	}
130	return ((ran % diff) + min);	161	return ((ran % diff) + min);
131	}	162	}
132		163
133	/*	164	/*
134	* Roll a number of dice (2d3, 4d6). Uses op to determine luck,	165	* Roll a number of dice (2d3, 4d6). Uses op to determine luck,
…		…
139	*/	170	*/
140		171
141	int	172	int
142	die_roll (int num, int size, const object *op, int goodbad)	173	die_roll (int num, int size, const object *op, int goodbad)
143	{	174	{
144	int min, diff, luck, total, i, gotlucky, base, ran;	175	int min, diff, luck, total, i, gotlucky, base;
145		176
146	diff = size;	177	diff = size;
147	min = 1;	178	min = 1;
148	luck = total = gotlucky = 0;	179	luck = total = gotlucky = 0;
149	((diff > 2) ? (base = 20) : (base = 50)); /* d2 and d3 are corner cases */	180	((diff > 2) ? (base = 20) : (base = 50)); /* d2 and d3 are corner cases */
…		…
156	if (op->type == PLAYER)	187	if (op->type == PLAYER)
157	luck = op->stats.luck;	188	luck = op->stats.luck;
158		189
159	for (i = 0; i < num; i++)	190	for (i = 0; i < num; i++)
160	{	191	{
161	if (RANDOM () % base < MIN (10, abs (luck)) && !gotlucky)	192	if (rndm (base) < MIN (10, abs (luck)) && !gotlucky)
162	{	193	{
163	/* we have a winner */	194	/* we have a winner */
164	gotlucky++;	195	gotlucky++;
165	((luck > 0) ? (luck = 1) : (luck = -1));	196	((luck > 0) ? (luck = 1) : (luck = -1));
166	diff -= luck;	197	diff -= luck;
167	if (diff < 1)	198	if (diff < 1)
168	return (num); /check again /	199	return (num); /check again /
169	((goodbad) ? (min += luck) : (diff));	200	((goodbad) ? (min += luck) : (diff));
170	ran = RANDOM ();
171	total += MAX (1, MIN (size, (ran % diff) + min));	201	total += MAX (1, MIN (size, rndm (diff) + min));
172	}	202	}
173	else	203	else
174	{
175	total += RANDOM () % size + 1;	204	total += rndm (size) + 1;
176	}
177	}	205	}
		206
178	return (total);	207	return total;
179	}	208	}
180		209
181	/*
182	* Another convenience function. Returns a number between min and max.
183	* It is suggested one use these functions rather than RANDOM()%, as it
184	* would appear that a number of off-by-one-errors exist due to improper
185	* use of %. This should also prevent SIGFPE.
186	*/
187
188	int
189	rndm (int min, int max)
190	{
191	int diff;
192
193	diff = max - min + 1;
194	if (max < 1 \|\| diff < 1)
195	return (min);
196
197	return (RANDOM () % diff + min);
198	}
199
200	/* decay and destroy persihable items in a map */	210	/* decay and destroy perishable items in a map */
201
202	void	211	void
203	decay_objects (maptile *m)	212	maptile::decay_objects ()
204	{	213	{
205	int x, y, destroy;	214	if (!spaces)
206	object op, otmp;
207
208	if (m->unique)
209	return;	215	return;
210		216
211	for (x = 0; x < m->width; x++)	217	for (mapspace *ms = spaces + size (); ms-- > spaces; )
212	for (y = 0; y < m->height; y++)	218	for (object above, op = ms->bot; op; op = above)
213	for (op = GET_MAP_OB (m, x, y); op; op = otmp)
214	{	219	{
		220	above = op->above;
		221
215	destroy = 0;	222	bool destroy = 0;
216	otmp = op->above;	223
		224	// do not decay anything above unique floor tiles (yet :)
217	if (QUERY_FLAG (op, FLAG_IS_FLOOR) && QUERY_FLAG (op, FLAG_UNIQUE))	225	if (QUERY_FLAG (op, FLAG_IS_FLOOR) && QUERY_FLAG (op, FLAG_UNIQUE))
218	break;	226	break;
		227
219	if (QUERY_FLAG (op, FLAG_IS_FLOOR)	228	if (QUERY_FLAG (op, FLAG_IS_FLOOR)
220	\|\| QUERY_FLAG (op, FLAG_OBJ_ORIGINAL)	229	\|\| QUERY_FLAG (op, FLAG_OBJ_ORIGINAL)
221	\|\| QUERY_FLAG (op, FLAG_OBJ_SAVE_ON_OVL)	230	\|\| QUERY_FLAG (op, FLAG_OBJ_SAVE_ON_OVL)
222	\|\| QUERY_FLAG (op, FLAG_UNIQUE)	231	\|\| QUERY_FLAG (op, FLAG_UNIQUE)
223	\|\| QUERY_FLAG (op, FLAG_OVERLAY_FLOOR)	232	\|\| QUERY_FLAG (op, FLAG_OVERLAY_FLOOR)
224	\|\| QUERY_FLAG (op, FLAG_UNPAID)	233	\|\| QUERY_FLAG (op, FLAG_UNPAID)
225	\|\| op->is_alive ())	234	\|\| op->is_alive ())
226	continue;	235	; // do not decay
227
228	/* otherwise, we decay and destroy */
229	if (op->is_weapon ())	236	else if (op->is_weapon ())
230	{	237	{
231	op->stats.dam--;	238	op->stats.dam--;
232	if (op->stats.dam < 0)	239	if (op->stats.dam < 0)
233	destroy = 1;	240	destroy = 1;
234	}	241	}
235	else if (op->is_armor ())	242	else if (op->is_armor ())
236	{	243	{
237	op->stats.ac--;	244	op->stats.ac--;
238	if (op->stats.ac < 0)	245	if (op->stats.ac < 0)
239	destroy = 1;	246	destroy = 1;
240	}	247	}
241	else if (op->type == FOOD)	248	else if (op->type == FOOD)
242	{	249	{
243	op->stats.food -= rndm (5, 20);	250	op->stats.food -= rndm (5, 20);
244	if (op->stats.food < 0)	251	if (op->stats.food < 0)
245	destroy = 1;	252	destroy = 1;
246	}	253	}
247	else	254	else
248	{	255	{
249	if (op->material & M_PAPER \|\| op->material & M_LEATHER \|\|	256	int mat = op->materials;
250	op->material & M_WOOD \|\| op->material & M_ORGANIC \|\| op->material & M_CLOTH \|\| op->material & M_LIQUID)	257
		258	if (mat & M_PAPER
		259	\|\| mat & M_LEATHER
		260	\|\| mat & M_WOOD
		261	\|\| mat & M_ORGANIC
		262	\|\| mat & M_CLOTH
		263	\|\| mat & M_LIQUID
		264	\|\| (mat & M_IRON && rndm (1, 5) == 1)
		265	\|\| (mat & M_GLASS && rndm (1, 2) == 1)
		266	\|\| ((mat & M_STONE \|\| mat & M_ADAMANT) && rndm (1, 10) == 1)
		267	\|\| ((mat & M_SOFT_METAL \|\| mat & M_BONE) && rndm (1, 3) == 1)
		268	\|\| (mat & M_ICE && temp > 32))
251	destroy = 1;	269	destroy = 1;
252	if (op->material & M_IRON && rndm (1, 5) == 1)
253	destroy = 1;
254	if (op->material & M_GLASS && rndm (1, 2) == 1)
255	destroy = 1;
256	if ((op->material & M_STONE \|\| op->material & M_ADAMANT) && rndm (1, 10) == 1)
257	destroy = 1;
258	if ((op->material & M_SOFT_METAL \|\| op->material & M_BONE) && rndm (1, 3) == 1)
259	destroy = 1;
260	if (op->material & M_ICE && m->temp > 32)
261	destroy = 1;
262	}	270	}
		271
263	/* adjust overall chance below */	272	/* adjust overall chance below */
264	if (destroy && rndm (0, 1))	273	if (destroy && rndm (0, 1))
265	op->destroy ();	274	op->destroy ();
266	}	275	}
267	}	276	}
268		277
269	/* convert materialname to materialtype_t */	278	/* convert materialname to materialtype_t */
270		279
271	materialtype_t *	280	materialtype_t *
272	name_to_material (const char *name)	281	name_to_material (const shstr &name)
273	{	282	{
274	materialtype_t mt, nmt;	283	for (materialtype_t *mt = materialt; mt && mt->next; mt = mt->next)
275		284	if (name == mt->name)
276	mt = NULL;
277	for (nmt = materialt; nmt != NULL && nmt->next != NULL; nmt = nmt->next)
278	{
279	if (strcmp (name, nmt->name) == 0)
280	{
281	mt = nmt;
282	break;
283	}
284	}
285	return mt;	285	return mt;
		286
		287	return materialt;
286	}	288	}
287		289
288	/* when doing transmutation of objects, we have to recheck the resistances,	290	/* when doing transmutation of objects, we have to recheck the resistances,
289	* as some that did not apply previously, may apply now.	291	* as some that did not apply previously, may apply now.
290	*/	292	*/
…		…
339		341
340	if (nmt == NULL)	342	if (nmt == NULL)
341	{	343	{
342	lmt = NULL;	344	lmt = NULL;
343	#ifndef NEW_MATERIAL_CODE	345	#ifndef NEW_MATERIAL_CODE
344	for (mt = materialt; mt != NULL && mt->next != NULL; mt = mt->next)	346	for (mt = materialt; mt && mt->next; mt = mt->next)
345	{	347	{
346	if (op->material & mt->material)	348	if (op->materials & mt->material)
347	{	349	{
348	lmt = mt;	350	lmt = mt;
349	break;	351	break;
350	}	352	}
351	}	353	}
352		354
353	#else	355	#else
354	for (mt = materialt; mt != NULL && mt->next != NULL; mt = mt->next)	356	for (mt = materialt; mt && mt->next; mt = mt->next)
355	{	357	{
356	if (op->material & mt->material && rndm (1, 100) <= mt->chance &&	358	if (op->materials & mt->material && rndm (1, 100) <= mt->chance &&
357	difficulty >= mt->difficulty && (op->magic >= mt->magic \|\| mt->magic == 0))	359	difficulty >= mt->difficulty && (op->magic >= mt->magic \|\| mt->magic == 0))
358	{	360	{
359	lmt = mt;	361	lmt = mt;
360	if (!(op->is_weapon () \|\| op->is_armor ()))	362	if (!(op->is_weapon () \|\| op->is_armor ()))
361	break;	363	break;
…		…
379	{	381	{
380	op->stats.dam += lmt->damage;	382	op->stats.dam += lmt->damage;
381	if (op->stats.dam < 1)	383	if (op->stats.dam < 1)
382	op->stats.dam = 1;	384	op->stats.dam = 1;
383	}	385	}
		386
384	if (op->stats.sp && op->type == BOW)	387	if (op->stats.sp && op->type == BOW)
385	op->stats.sp += lmt->sp;	388	op->stats.sp += lmt->sp;
386	if (op->stats.wc && op->is_weapon ())	389	if (op->stats.wc && op->is_weapon ())
387	op->stats.wc += lmt->wc;	390	op->stats.wc += lmt->wc;
388	if (op->is_armor ())	391	if (op->is_armor ())
…		…
397	op->resist[j] = 100;	400	op->resist[j] = 100;
398	if (op->resist[j] < -100)	401	if (op->resist[j] < -100)
399	op->resist[j] = -100;	402	op->resist[j] = -100;
400	}	403	}
401	}	404	}
402	op->materialname = add_string (lmt->name);	405	op->materialname = lmt->name;
403	/* dont make it unstackable if it doesn't need to be */	406	/* dont make it unstackable if it doesn't need to be */
404	if (op->is_weapon () \|\| op->is_armor ())	407	if (op->is_weapon () \|\| op->is_armor ())
405	{	408	{
406	op->weight = (op->weight * lmt->weight) / 100;	409	op->weight = (op->weight * lmt->weight) / 100;
407	op->value = (op->value * lmt->value) / 100;	410	op->value = (op->value * lmt->value) / 100;
…		…
544	return;	547	return;
545	}	548	}
546		549
547	/////////////////////////////////////////////////////////////////////////////	550	/////////////////////////////////////////////////////////////////////////////
548		551
		552	void
		553	fork_abort (const char *msg)
		554	{
		555	if (!fork ())
		556	{
		557	signal (SIGABRT, SIG_DFL);
		558	// try to put corefiles into a subdirectory, if existing, to allow
		559	// an administrator to reduce the I/O load.
		560	chdir ("cores");
		561	abort ();
		562	}
		563
		564	LOG (llevError, "fork abort: %s\n", msg);
		565	}
		566
549	void *salloc_ (int n) throw (std::bad_alloc)	567	void *salloc_ (int n) throw (std::bad_alloc)
550	{	568	{
		569	#ifdef PREFER_MALLOC
		570	void *ptr = malloc (n);
		571	#else
551	void *ptr = g_slice_alloc (n);	572	void *ptr = g_slice_alloc (n);
		573	#endif
552		574
553	if (!ptr)	575	if (!ptr)
554	throw std::bad_alloc ();	576	throw std::bad_alloc ();
555		577
556	return ptr;	578	return ptr;
…		…
590	}	612	}
591	else	613	else
592	memcpy (dst, src, len + 1);	614	memcpy (dst, src, len + 1);
593	}	615	}
594		616
		617	const std::string
		618	format (const char *format, ...)
		619	{
		620	int len;
		621
		622	{
		623	char buf[128];
		624
		625	va_list ap;
		626	va_start (ap, format);
		627	len = vsnprintf (buf, sizeof (buf), format, ap);
		628	va_end (ap);
		629
		630	assert (len >= 0); // shield againstz broken vsnprintf's
		631
		632	// was our static buffer short enough?
		633	if (len < sizeof (buf))
		634	return std::string (buf, len);
		635	}
		636
		637	{
		638	// longer, try harder
		639	char *buf = salloc<char> (len + 1);
		640
		641	va_list ap;
		642	va_start (ap, format);
		643	vsnprintf (buf, len + 1, format, ap);
		644	va_end (ap);
		645
		646	const std::string s (buf, len);
		647	sfree<char> (buf, len + 1);
		648
		649	return buf;
		650	}
		651	}
		652
595	tstamp now ()	653	tstamp now ()
596	{	654	{
597	struct timeval tv;	655	struct timeval tv;
598		656
599	gettimeofday (&tv, 0);	657	gettimeofday (&tv, 0);
600	return tstamp (tv.tv_sec) + tstamp (tv.tv_usec) * tstamp (1e-6);	658	return tstamp (tv.tv_sec) + tstamp (tv.tv_usec) * tstamp (1e-6);
601	}	659	}
602		660
		661	int
		662	similar_direction (int a, int b)
		663	{
		664	if (!a \|\| !b)
		665	return 0;
		666
		667	int diff = (b - a) & 7;
		668	return diff <= 1 \|\| diff >= 7;
		669	}
		670
		671	/* crc32 0xdebb20e3 table and supplementary functions. */
		672	extern const uint32_t crc_32_tab[256] =
		673	{
		674	0x00000000UL, 0x77073096UL, 0xee0e612cUL, 0x990951baUL, 0x076dc419UL,
		675	0x706af48fUL, 0xe963a535UL, 0x9e6495a3UL, 0x0edb8832UL, 0x79dcb8a4UL,
		676	0xe0d5e91eUL, 0x97d2d988UL, 0x09b64c2bUL, 0x7eb17cbdUL, 0xe7b82d07UL,
		677	0x90bf1d91UL, 0x1db71064UL, 0x6ab020f2UL, 0xf3b97148UL, 0x84be41deUL,
		678	0x1adad47dUL, 0x6ddde4ebUL, 0xf4d4b551UL, 0x83d385c7UL, 0x136c9856UL,
		679	0x646ba8c0UL, 0xfd62f97aUL, 0x8a65c9ecUL, 0x14015c4fUL, 0x63066cd9UL,
		680	0xfa0f3d63UL, 0x8d080df5UL, 0x3b6e20c8UL, 0x4c69105eUL, 0xd56041e4UL,
		681	0xa2677172UL, 0x3c03e4d1UL, 0x4b04d447UL, 0xd20d85fdUL, 0xa50ab56bUL,
		682	0x35b5a8faUL, 0x42b2986cUL, 0xdbbbc9d6UL, 0xacbcf940UL, 0x32d86ce3UL,
		683	0x45df5c75UL, 0xdcd60dcfUL, 0xabd13d59UL, 0x26d930acUL, 0x51de003aUL,
		684	0xc8d75180UL, 0xbfd06116UL, 0x21b4f4b5UL, 0x56b3c423UL, 0xcfba9599UL,
		685	0xb8bda50fUL, 0x2802b89eUL, 0x5f058808UL, 0xc60cd9b2UL, 0xb10be924UL,
		686	0x2f6f7c87UL, 0x58684c11UL, 0xc1611dabUL, 0xb6662d3dUL, 0x76dc4190UL,
		687	0x01db7106UL, 0x98d220bcUL, 0xefd5102aUL, 0x71b18589UL, 0x06b6b51fUL,
		688	0x9fbfe4a5UL, 0xe8b8d433UL, 0x7807c9a2UL, 0x0f00f934UL, 0x9609a88eUL,
		689	0xe10e9818UL, 0x7f6a0dbbUL, 0x086d3d2dUL, 0x91646c97UL, 0xe6635c01UL,
		690	0x6b6b51f4UL, 0x1c6c6162UL, 0x856530d8UL, 0xf262004eUL, 0x6c0695edUL,
		691	0x1b01a57bUL, 0x8208f4c1UL, 0xf50fc457UL, 0x65b0d9c6UL, 0x12b7e950UL,
		692	0x8bbeb8eaUL, 0xfcb9887cUL, 0x62dd1ddfUL, 0x15da2d49UL, 0x8cd37cf3UL,
		693	0xfbd44c65UL, 0x4db26158UL, 0x3ab551ceUL, 0xa3bc0074UL, 0xd4bb30e2UL,
		694	0x4adfa541UL, 0x3dd895d7UL, 0xa4d1c46dUL, 0xd3d6f4fbUL, 0x4369e96aUL,
		695	0x346ed9fcUL, 0xad678846UL, 0xda60b8d0UL, 0x44042d73UL, 0x33031de5UL,
		696	0xaa0a4c5fUL, 0xdd0d7cc9UL, 0x5005713cUL, 0x270241aaUL, 0xbe0b1010UL,
		697	0xc90c2086UL, 0x5768b525UL, 0x206f85b3UL, 0xb966d409UL, 0xce61e49fUL,
		698	0x5edef90eUL, 0x29d9c998UL, 0xb0d09822UL, 0xc7d7a8b4UL, 0x59b33d17UL,
		699	0x2eb40d81UL, 0xb7bd5c3bUL, 0xc0ba6cadUL, 0xedb88320UL, 0x9abfb3b6UL,
		700	0x03b6e20cUL, 0x74b1d29aUL, 0xead54739UL, 0x9dd277afUL, 0x04db2615UL,
		701	0x73dc1683UL, 0xe3630b12UL, 0x94643b84UL, 0x0d6d6a3eUL, 0x7a6a5aa8UL,
		702	0xe40ecf0bUL, 0x9309ff9dUL, 0x0a00ae27UL, 0x7d079eb1UL, 0xf00f9344UL,
		703	0x8708a3d2UL, 0x1e01f268UL, 0x6906c2feUL, 0xf762575dUL, 0x806567cbUL,
		704	0x196c3671UL, 0x6e6b06e7UL, 0xfed41b76UL, 0x89d32be0UL, 0x10da7a5aUL,
		705	0x67dd4accUL, 0xf9b9df6fUL, 0x8ebeeff9UL, 0x17b7be43UL, 0x60b08ed5UL,
		706	0xd6d6a3e8UL, 0xa1d1937eUL, 0x38d8c2c4UL, 0x4fdff252UL, 0xd1bb67f1UL,
		707	0xa6bc5767UL, 0x3fb506ddUL, 0x48b2364bUL, 0xd80d2bdaUL, 0xaf0a1b4cUL,
		708	0x36034af6UL, 0x41047a60UL, 0xdf60efc3UL, 0xa867df55UL, 0x316e8eefUL,
		709	0x4669be79UL, 0xcb61b38cUL, 0xbc66831aUL, 0x256fd2a0UL, 0x5268e236UL,
		710	0xcc0c7795UL, 0xbb0b4703UL, 0x220216b9UL, 0x5505262fUL, 0xc5ba3bbeUL,
		711	0xb2bd0b28UL, 0x2bb45a92UL, 0x5cb36a04UL, 0xc2d7ffa7UL, 0xb5d0cf31UL,
		712	0x2cd99e8bUL, 0x5bdeae1dUL, 0x9b64c2b0UL, 0xec63f226UL, 0x756aa39cUL,
		713	0x026d930aUL, 0x9c0906a9UL, 0xeb0e363fUL, 0x72076785UL, 0x05005713UL,
		714	0x95bf4a82UL, 0xe2b87a14UL, 0x7bb12baeUL, 0x0cb61b38UL, 0x92d28e9bUL,
		715	0xe5d5be0dUL, 0x7cdcefb7UL, 0x0bdbdf21UL, 0x86d3d2d4UL, 0xf1d4e242UL,
		716	0x68ddb3f8UL, 0x1fda836eUL, 0x81be16cdUL, 0xf6b9265bUL, 0x6fb077e1UL,
		717	0x18b74777UL, 0x88085ae6UL, 0xff0f6a70UL, 0x66063bcaUL, 0x11010b5cUL,
		718	0x8f659effUL, 0xf862ae69UL, 0x616bffd3UL, 0x166ccf45UL, 0xa00ae278UL,
		719	0xd70dd2eeUL, 0x4e048354UL, 0x3903b3c2UL, 0xa7672661UL, 0xd06016f7UL,
		720	0x4969474dUL, 0x3e6e77dbUL, 0xaed16a4aUL, 0xd9d65adcUL, 0x40df0b66UL,
		721	0x37d83bf0UL, 0xa9bcae53UL, 0xdebb9ec5UL, 0x47b2cf7fUL, 0x30b5ffe9UL,
		722	0xbdbdf21cUL, 0xcabac28aUL, 0x53b39330UL, 0x24b4a3a6UL, 0xbad03605UL,
		723	0xcdd70693UL, 0x54de5729UL, 0x23d967bfUL, 0xb3667a2eUL, 0xc4614ab8UL,
		724	0x5d681b02UL, 0x2a6f2b94UL, 0xb40bbe37UL, 0xc30c8ea1UL, 0x5a05df1bUL,
		725	0x2d02ef8dL
		726	};
		727
		728

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Comparing deliantra/server/common/utils.C (file contents): Revision 1.31 by root, Mon Dec 25 14:54:44 2006 UTC vs. Revision 1.52 by root, Fri Apr 27 14:41:37 2007 UTC

Diff Legend

Comparing deliantra/server/common/utils.C (file contents):
Revision 1.31 by root, Mon Dec 25 14:54:44 2006 UTC vs.
Revision 1.52 by root, Fri Apr 27 14:41:37 2007 UTC