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Comparing deliantra/server/common/utils.C (file contents):
Revision 1.44 by root, Thu Jan 25 03:54:44 2007 UTC vs.
Revision 1.78 by root, Fri May 16 17:09:38 2008 UTC

1/* 1/*
2 * CrossFire, A Multiplayer game for X-windows 2 * This file is part of Deliantra, the Roguelike Realtime MMORPG.
3 * 3 *
4 * Copyright (C) 2005, 2006, 2007 Marc Lehmann & Crossfire+ Development Team 4 * Copyright (©) 2005,2006,2007,2008 Marc Alexander Lehmann / Robin Redeker / the Deliantra team
5 * Copyright (C) 2002 Mark Wedel & Crossfire Development Team 5 * Copyright (©) 2002,2007 Mark Wedel & Crossfire Development Team
6 * Copyright (C) 1992 Frank Tore Johansen 6 * Copyright (©) 1992,2007 Frank Tore Johansen
7 * 7 *
8 * This program is free software; you can redistribute it and/or modify 8 * Deliantra is free software: you can redistribute it and/or modify
9 * 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
10 * the Free Software Foundation; either version 2 of the License, or 10 * the Free Software Foundation, either version 3 of the License, or
11 * (at your option) any later version. 11 * (at your option) any later version.
12 * 12 *
13 * 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,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details. 16 * GNU General Public License for more details.
17 * 17 *
18 * 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
19 * along with this program; if not, write to the Free Software 19 * along with this program. If not, see <http://www.gnu.org/licenses/>.
20 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 * 20 *
22 * The authors can be reached via e-mail at <crossfire@schmorp.de> 21 * The authors can be reached via e-mail to <support@deliantra.net>
23 */ 22 */
24 23
25/* 24/*
26 * General convenience functions for crossfire. 25 * General convenience functions for crossfire.
27 */ 26 */
32#include <sys/time.h> 31#include <sys/time.h>
33#include <time.h> 32#include <time.h>
34#include <signal.h> 33#include <signal.h>
35 34
36#include <global.h> 35#include <global.h>
37#include <funcpoint.h>
38#include <material.h> 36#include <material.h>
39 37
40#include <glib.h> 38#include <glib.h>
41 39
42rand_gen rndm; 40refcnt_base::refcnt_t refcnt_dummy;
41ssize_t slice_alloc;
42rand_gen rndm, rmg_rndm;
43 43
44void 44void
45tausworthe_random_generator::seed (uint32_t seed) 45tausworthe_random_generator::seed (uint32_t seed)
46{ 46{
47 state [0] = max ( 2U, seed * 69069U); 47 state [0] = seed * 69069U; if (state [0] < 2U) state [0] += 2U;
48 state [1] = max ( 8U, state [0] * 69069U); 48 state [1] = state [0] * 69069U; if (state [0] < 8U) state [0] += 8U;
49 state [2] = max ( 16U, state [1] * 69069U); 49 state [2] = state [1] * 69069U; if (state [0] < 16U) state [0] += 16U;
50 state [3] = max (128U, state [2] * 69069U); 50 state [3] = state [2] * 69069U; if (state [0] < 128U) state [0] += 128U;
51 51
52 for (int i = 11; --i; ) 52 for (int i = 11; --i; )
53 operator ()(); 53 operator ()();
54} 54}
55 55
63 63
64 return state [0] ^ state [1] ^ state [2] ^ state [3]; 64 return state [0] ^ state [1] ^ state [2] ^ state [3];
65} 65}
66 66
67uint32_t 67uint32_t
68tausworthe_random_generator::get_range (uint32_t r_max) 68tausworthe_random_generator::get_range (uint32_t num)
69{ 69{
70 return next () % r_max; 70 return (next () * (uint64_t)num) >> 32U;
71} 71}
72 72
73// return a number within (min .. max) 73// return a number within (min .. max)
74int 74int
75tausworthe_random_generator::get_range (int r_min, int r_max) 75tausworthe_random_generator::get_range (int r_min, int r_max)
76{ 76{
77 return r_min + (*this) (max (r_max - r_min + 1, 1)); 77 return r_min + get_range (max (r_max - r_min + 1, 0));
78} 78}
79 79
80/* 80/*
81 * The random functions here take luck into account when rolling random 81 * The random functions here take luck into account when rolling random
82 * 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
93 * not the recipient (ie, the poor slob getting hit). [garbled 20010916] 93 * not the recipient (ie, the poor slob getting hit). [garbled 20010916]
94 */ 94 */
95int 95int
96random_roll (int r_min, int r_max, const object *op, int goodbad) 96random_roll (int r_min, int r_max, const object *op, int goodbad)
97{ 97{
98 r_max = max (r_min, r_max);
99
98 int base = r_max - r_min > 1 ? 20 : 50; /* d2 and d3 are corner cases */ 100 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 }
105 101
106 if (op->type == PLAYER) 102 if (op->type == PLAYER)
107 { 103 {
108 int luck = op->stats.luck; 104 int luck = op->stats.luck;
109 105
118 114
119/* 115/*
120 * This is a 64 bit version of random_roll above. This is needed 116 * This is a 64 bit version of random_roll above. This is needed
121 * for exp loss calculations for players changing religions. 117 * for exp loss calculations for players changing religions.
122 */ 118 */
123
124sint64 119sint64
125random_roll64 (sint64 min, sint64 max, const object *op, int goodbad) 120random_roll64 (sint64 r_min, sint64 r_max, const object *op, int goodbad)
126{ 121{
127 sint64 omin, diff, luck, ran; 122 sint64 omin = r_min;
128 int base; 123 sint64 range = max (0, r_max - r_min + 1);
124 int base = range > 2 ? 20 : 50; /* d2 and d3 are corner cases */
129 125
130 omin = min; 126 /*
131 diff = max - min + 1;
132 ((diff > 2) ? (base = 20) : (base = 50)); /* d2 and d3 are corner cases */
133
134 if (max < 1 || diff < 1)
135 {
136 LOG (llevError, "Calling random_roll with min=%" PRId64 " max=%" PRId64 "\n", min, max);
137 return (min); /* avoids a float exception */
138 }
139
140 /* Don't know of a portable call to get 64 bit random values.
141 * So make a call to get two 32 bit random numbers, and just to 127 * Make a call to get two 32 bit unsigned random numbers, and just to
142 * a little byteshifting. Do make sure the first one is only 128 * a little bitshifting.
143 * 32 bit, so we don't get skewed results
144 */ 129 */
145 ran = (RANDOM () & 0xffffffff) | ((sint64) RANDOM () << 32); 130 sint64 ran = (sint64) rndm.next () ^ ((sint64) rndm.next () << 31);
146 131
147 if (op->type != PLAYER) 132 if (op->type != PLAYER)
148 return ((ran % diff) + min); 133 return ((ran % range) + r_min);
149 134
150 luck = op->stats.luck; 135 int luck = op->stats.luck;
136
151 if (RANDOM () % base < MIN (10, abs (luck))) 137 if (rndm (base) < min (10, abs (luck)))
152 { 138 {
153 /* we have a winner */ 139 /* we have a winner */
154 ((luck > 0) ? (luck = 1) : (luck = -1)); 140 ((luck > 0) ? (luck = 1) : (luck = -1));
155 diff -= luck; 141 range -= luck;
156 if (diff < 1) 142 if (range < 1)
157 return (omin); /*check again */ 143 return (omin); /*check again */
144
158 ((goodbad) ? (min += luck) : (diff)); 145 ((goodbad) ? (r_min += luck) : (range));
159 146
160 return (MAX (omin, MIN (max, (ran % diff) + min))); 147 return (max (omin, min (r_max, (ran % range) + r_min)));
161 } 148 }
162 return ((ran % diff) + min); 149
150 return ran % range + r_min;
163} 151}
164 152
165/* 153/*
166 * Roll a number of dice (2d3, 4d6). Uses op to determine luck, 154 * Roll a number of dice (2d3, 4d6). Uses op to determine luck,
167 * If goodbad is non-zero, luck increases the roll, if zero, it decreases. 155 * If goodbad is non-zero, luck increases the roll, if zero, it decreases.
168 * Generally, op should be the player/caster/hitter requesting the roll, 156 * Generally, op should be the player/caster/hitter requesting the roll,
169 * not the recipient (ie, the poor slob getting hit). 157 * not the recipient (ie, the poor slob getting hit).
170 * The args are num D size (ie 4d6) [garbled 20010916] 158 * The args are num D size (ie 4d6) [garbled 20010916]
171 */ 159 */
172
173int 160int
174die_roll (int num, int size, const object *op, int goodbad) 161die_roll (int num, int size, const object *op, int goodbad)
175{ 162{
176 int min, diff, luck, total, i, gotlucky, base, ran; 163 int min, luck, total, i, gotlucky;
177 164
178 diff = size; 165 int diff = size;
179 min = 1; 166 min = 1;
180 luck = total = gotlucky = 0; 167 luck = total = gotlucky = 0;
181 ((diff > 2) ? (base = 20) : (base = 50)); /* d2 and d3 are corner cases */ 168 int base = diff > 2 ? 20 : 50; /* d2 and d3 are corner cases */
169
182 if (size < 2 || diff < 1) 170 if (size < 2 || diff < 1)
183 { 171 {
184 LOG (llevError, "Calling die_roll with num=%d size=%d\n", num, size); 172 LOG (llevError, "Calling die_roll with num=%d size=%d\n", num, size);
185 return (num); /* avoids a float exception */ 173 return num; /* avoids a float exception */
186 } 174 }
187 175
188 if (op->type == PLAYER) 176 if (op->type == PLAYER)
189 luck = op->stats.luck; 177 luck = op->stats.luck;
190 178
191 for (i = 0; i < num; i++) 179 for (i = 0; i < num; i++)
192 { 180 {
193 if (RANDOM () % base < MIN (10, abs (luck)) && !gotlucky) 181 if (rndm (base) < MIN (10, abs (luck)) && !gotlucky)
194 { 182 {
195 /* we have a winner */ 183 /* we have a winner */
196 gotlucky++; 184 gotlucky++;
197 ((luck > 0) ? (luck = 1) : (luck = -1)); 185 ((luck > 0) ? (luck = 1) : (luck = -1));
198 diff -= luck; 186 diff -= luck;
199 if (diff < 1) 187 if (diff < 1)
200 return (num); /*check again */ 188 return (num); /*check again */
201 ((goodbad) ? (min += luck) : (diff)); 189 ((goodbad) ? (min += luck) : (diff));
202 ran = RANDOM ();
203 total += MAX (1, MIN (size, (ran % diff) + min)); 190 total += MAX (1, MIN (size, rndm (diff) + min));
204 } 191 }
205 else 192 else
206 {
207 total += RANDOM () % size + 1; 193 total += rndm (size) + 1;
208 }
209 } 194 }
195
210 return (total); 196 return total;
211}
212
213/* decay and destroy perishable items in a map */
214void
215maptile::decay_objects ()
216{
217 if (!spaces)
218 return;
219
220 for (mapspace *ms = spaces + size (); ms-- > spaces; )
221 for (object *above, *op = ms->bot; op; op = above)
222 {
223 above = op->above;
224
225 bool destroy = 0;
226
227 // do not decay anything above unique floor tiles (yet :)
228 if (QUERY_FLAG (op, FLAG_IS_FLOOR) && QUERY_FLAG (op, FLAG_UNIQUE))
229 break;
230
231 if (QUERY_FLAG (op, FLAG_IS_FLOOR)
232 || QUERY_FLAG (op, FLAG_OBJ_ORIGINAL)
233 || QUERY_FLAG (op, FLAG_OBJ_SAVE_ON_OVL)
234 || QUERY_FLAG (op, FLAG_UNIQUE)
235 || QUERY_FLAG (op, FLAG_OVERLAY_FLOOR)
236 || QUERY_FLAG (op, FLAG_UNPAID)
237 || op->is_alive ())
238 ; // do not decay
239 else if (op->is_weapon ())
240 {
241 op->stats.dam--;
242 if (op->stats.dam < 0)
243 destroy = 1;
244 }
245 else if (op->is_armor ())
246 {
247 op->stats.ac--;
248 if (op->stats.ac < 0)
249 destroy = 1;
250 }
251 else if (op->type == FOOD)
252 {
253 op->stats.food -= rndm (5, 20);
254 if (op->stats.food < 0)
255 destroy = 1;
256 }
257 else
258 {
259 int mat = op->material;
260
261 if (mat & M_PAPER
262 || mat & M_LEATHER
263 || mat & M_WOOD
264 || mat & M_ORGANIC
265 || mat & M_CLOTH
266 || mat & M_LIQUID
267 || (mat & M_IRON && rndm (1, 5) == 1)
268 || (mat & M_GLASS && rndm (1, 2) == 1)
269 || ((mat & M_STONE || mat & M_ADAMANT) && rndm (1, 10) == 1)
270 || ((mat & M_SOFT_METAL || mat & M_BONE) && rndm (1, 3) == 1)
271 || (mat & M_ICE && temp > 32))
272 destroy = 1;
273 }
274
275 /* adjust overall chance below */
276 if (destroy && rndm (0, 1))
277 op->destroy ();
278 }
279} 197}
280 198
281/* convert materialname to materialtype_t */ 199/* convert materialname to materialtype_t */
282 200
283materialtype_t * 201materialtype_t *
284name_to_material (const char *name) 202name_to_material (const shstr &name)
285{ 203{
286 materialtype_t *mt, *nmt; 204 for (materialtype_t *mt = materialt; mt && mt->next; mt = mt->next)
205 if (name == mt->name)
206 return mt;
287 207
288 mt = NULL;
289 for (nmt = materialt; nmt != NULL && nmt->next != NULL; nmt = nmt->next)
290 {
291 if (strcmp (name, nmt->name) == 0)
292 {
293 mt = nmt;
294 break;
295 }
296 }
297 return mt; 208 return 0;
298} 209}
299 210
300/* when doing transmutation of objects, we have to recheck the resistances, 211/* when doing transmutation of objects, we have to recheck the resistances,
301 * as some that did not apply previously, may apply now. 212 * as some that did not apply previously, may apply now.
302 */ 213 */
303
304void 214void
305transmute_materialname (object *op, const object *change) 215transmute_materialname (object *op, const object *change)
306{ 216{
307 materialtype_t *mt; 217 materialtype_t *mt;
308 int j; 218 int j;
317 return; 227 return;
318 228
319 mt = name_to_material (op->materialname); 229 mt = name_to_material (op->materialname);
320 if (!mt) 230 if (!mt)
321 { 231 {
322 LOG (llevError, "archetype '%s>%s' uses nonexistent material '%s'\n", &op->arch->name, &op->name, &op->materialname); 232 LOG (llevError, "archetype '%s>%s' uses nonexistent material '%s'\n", &op->arch->archname, &op->name, &op->materialname);
323 return; 233 return;
324 } 234 }
325 235
326 for (j = 0; j < NROFATTACKS; j++) 236 for (j = 0; j < NROFATTACKS; j++)
327 if (op->resist[j] == 0 && change->resist[j] != 0) 237 if (op->resist[j] == 0 && change->resist[j] != 0)
338void 248void
339set_materialname (object *op, int difficulty, materialtype_t *nmt) 249set_materialname (object *op, int difficulty, materialtype_t *nmt)
340{ 250{
341 materialtype_t *mt, *lmt; 251 materialtype_t *mt, *lmt;
342 252
343#ifdef NEW_MATERIAL_CODE
344 int j;
345#endif
346
347 if (op->materialname != NULL) 253 if (op->materialname != NULL)
348 return; 254 return;
349 255
350
351
352 if (nmt == NULL) 256 if (nmt == NULL)
353 { 257 {
354 lmt = NULL; 258 lmt = NULL;
355#ifndef NEW_MATERIAL_CODE 259
356 for (mt = materialt; mt != NULL && mt->next != NULL; mt = mt->next) 260 for (mt = materialt; mt && mt->next; mt = mt->next)
357 { 261 if (op->materials & mt->material && rndm (1, 100) <= mt->chance &&
358 if (op->material & mt->material) 262 difficulty >= mt->difficulty && (op->magic >= mt->magic || mt->magic == 0))
359 { 263 {
360 lmt = mt; 264 lmt = mt;
265 if (!(op->is_weapon () || op->is_armor ()))
361 break; 266 break;
362 } 267 }
363 }
364
365#else
366 for (mt = materialt; mt != NULL && mt->next != NULL; mt = mt->next)
367 {
368 if (op->material & mt->material && rndm (1, 100) <= mt->chance &&
369 difficulty >= mt->difficulty && (op->magic >= mt->magic || mt->magic == 0))
370 {
371 lmt = mt;
372 if (!(op->is_weapon () || op->is_armor ()))
373 break;
374 }
375 }
376#endif
377 } 268 }
378 else 269 else
379 {
380 lmt = nmt; 270 lmt = nmt;
381 }
382 271
383 if (lmt != NULL) 272 if (lmt != NULL)
384 { 273 {
385#ifndef NEW_MATERIAL_CODE
386 op->materialname = lmt->name;
387 return;
388#else
389
390 if (op->stats.dam && op->is_weapon ()) 274 if (op->stats.dam && op->is_weapon ())
391 { 275 {
392 op->stats.dam += lmt->damage; 276 op->stats.dam += lmt->damage;
393 if (op->stats.dam < 1) 277 if (op->stats.dam < 1)
394 op->stats.dam = 1; 278 op->stats.dam = 1;
395 } 279 }
280
396 if (op->stats.sp && op->type == BOW) 281 if (op->stats.sp && op->type == BOW)
397 op->stats.sp += lmt->sp; 282 op->stats.sp += lmt->sp;
398 if (op->stats.wc && op->is_weapon ()) 283 if (op->stats.wc && op->is_weapon ())
399 op->stats.wc += lmt->wc; 284 op->stats.wc += lmt->wc;
400 if (op->is_armor ()) 285 if (op->is_armor ())
401 { 286 {
402 if (op->stats.ac) 287 if (op->stats.ac)
403 op->stats.ac += lmt->ac; 288 op->stats.ac += lmt->ac;
289
404 for (j = 0; j < NROFATTACKS; j++) 290 for (int j = 0; j < NROFATTACKS; j++)
405 if (op->resist[j] != 0) 291 if (op->resist[j] != 0)
406 { 292 {
407 op->resist[j] += lmt->mod[j]; 293 op->resist[j] += lmt->mod[j];
408 if (op->resist[j] > 100) 294 if (op->resist[j] > 100)
409 op->resist[j] = 100; 295 op->resist[j] = 100;
410 if (op->resist[j] < -100) 296 if (op->resist[j] < -100)
411 op->resist[j] = -100; 297 op->resist[j] = -100;
412 } 298 }
413 } 299 }
300
414 op->materialname = add_string (lmt->name); 301 op->materialname = lmt->name;
415 /* dont make it unstackable if it doesn't need to be */ 302 /* dont make it unstackable if it doesn't need to be */
416 if (op->is_weapon () || op->is_armor ()) 303 if (op->is_weapon () || op->is_armor ())
417 { 304 {
418 op->weight = (op->weight * lmt->weight) / 100; 305 op->weight = (op->weight * lmt->weight) / 100;
419 op->value = (op->value * lmt->value) / 100; 306 op->value = (op->value * lmt->value) / 100;
420 } 307 }
421#endif
422 } 308 }
423} 309}
424 310
425/* 311/*
426 * Strip out the media tags from a String. 312 * Strip out the media tags from a String.
521 * a 'list' for the purposes here, is a string of items, seperated by commas, except 407 * a 'list' for the purposes here, is a string of items, seperated by commas, except
522 * for the last entry, which has an 'and' before it, and a full stop (period) after it. 408 * for the last entry, which has an 'and' before it, and a full stop (period) after it.
523 * This function will also strip all trailing non alphanumeric characters. 409 * This function will also strip all trailing non alphanumeric characters.
524 * It does not insert an oxford comma. 410 * It does not insert an oxford comma.
525 */ 411 */
526
527void 412void
528make_list_like (char *input) 413make_list_like (char *input)
529{ 414{
530 char *p, tmp[MAX_BUF]; 415 char *p, tmp[MAX_BUF];
531 int i; 416 int i;
562fork_abort (const char *msg) 447fork_abort (const char *msg)
563{ 448{
564 if (!fork ()) 449 if (!fork ())
565 { 450 {
566 signal (SIGABRT, SIG_DFL); 451 signal (SIGABRT, SIG_DFL);
452 // try to put corefiles into a subdirectory, if existing, to allow
453 // an administrator to reduce the I/O load.
454 chdir ("cores");
567 abort (); 455 abort ();
568 } 456 }
569 457
570 LOG (llevError, "fork abort: %s\n", msg); 458 LOG (llevError, "fork abort: %s\n", msg);
571} 459}
572 460
573void *salloc_ (int n) throw (std::bad_alloc) 461void *salloc_ (int n) throw (std::bad_alloc)
574{ 462{
575#ifdef PREFER_MALLOC
576 void *ptr = malloc (n);
577#else
578 void *ptr = g_slice_alloc (n); 463 void *ptr = g_slice_alloc (n);
579#endif
580 464
581 if (!ptr) 465 if (!ptr)
582 throw std::bad_alloc (); 466 throw std::bad_alloc ();
583 467
468 slice_alloc += n;
584 return ptr; 469 return ptr;
585} 470}
586 471
587void *salloc_ (int n, void *src) throw (std::bad_alloc) 472void *salloc_ (int n, void *src) throw (std::bad_alloc)
588{ 473{
594 memset (ptr, 0, n); 479 memset (ptr, 0, n);
595 480
596 return ptr; 481 return ptr;
597} 482}
598 483
484/******************************************************************************/
485
486#if DEBUG_SALLOC
487
488#define MAGIC 0xa1b2c35543deadLL
489
490void *g_slice_alloc (unsigned long size)
491{
492 unsigned long *p = (unsigned long *) (g_slice_alloc)(size + sizeof (unsigned long));
493 *p++ = size ^ MAGIC;
494 //fprintf (stderr, "g_slice_alloc %ld %p\n", size, p);//D
495 return (void *)p;
496}
497
498void *g_slice_alloc0 (unsigned long size)
499{
500 return memset (g_slice_alloc (size), 0, size);
501}
502
503void g_slice_free1 (unsigned long size, void *ptr)
504{
505 //fprintf (stderr, "g_slice_free %ld %p\n", size, ptr);//D
506 if (expect_true (ptr))
507 {
508 unsigned long *p = (unsigned long *)ptr;
509 unsigned long s = *--p ^ MAGIC;
510
511 if (size != (unsigned long)(*p ^ MAGIC))
512 {
513 LOG (logBacktrace | llevError, "slice free size (%lx) doesn't match alloc size (%lx)\n", size, s);
514 abort ();
515 }
516
517 *p = MAGIC;
518
519 (g_slice_free1)(s + sizeof (unsigned long), p);
520 }
521}
522
523#endif
524
525/******************************************************************************/
526
599void assign (char *dst, const char *src, int maxlen) 527void assign (char *dst, const char *src, int maxlen)
600{ 528{
601 if (!src) 529 if (!src)
602 src = ""; 530 src = "";
603 531
618 } 546 }
619 else 547 else
620 memcpy (dst, src, len + 1); 548 memcpy (dst, src, len + 1);
621} 549}
622 550
551const char *
552format (const char *format, ...)
553{
554 static dynbuf_text buf;
555
556 buf.clear ();
557
558 va_list ap;
559 va_start (ap, format);
560 buf.vprintf (format, ap);
561 va_end (ap);
562
563 return buf;
564}
565
623tstamp now () 566tstamp now ()
624{ 567{
625 struct timeval tv; 568 struct timeval tv;
626 569
627 gettimeofday (&tv, 0); 570 gettimeofday (&tv, 0);
636 579
637 int diff = (b - a) & 7; 580 int diff = (b - a) & 7;
638 return diff <= 1 || diff >= 7; 581 return diff <= 1 || diff >= 7;
639} 582}
640 583
584/* crc32 0xdebb20e3 table and supplementary functions. */
585extern const uint32_t crc_32_tab[256] =
586{
587 0x00000000UL, 0x77073096UL, 0xee0e612cUL, 0x990951baUL, 0x076dc419UL,
588 0x706af48fUL, 0xe963a535UL, 0x9e6495a3UL, 0x0edb8832UL, 0x79dcb8a4UL,
589 0xe0d5e91eUL, 0x97d2d988UL, 0x09b64c2bUL, 0x7eb17cbdUL, 0xe7b82d07UL,
590 0x90bf1d91UL, 0x1db71064UL, 0x6ab020f2UL, 0xf3b97148UL, 0x84be41deUL,
591 0x1adad47dUL, 0x6ddde4ebUL, 0xf4d4b551UL, 0x83d385c7UL, 0x136c9856UL,
592 0x646ba8c0UL, 0xfd62f97aUL, 0x8a65c9ecUL, 0x14015c4fUL, 0x63066cd9UL,
593 0xfa0f3d63UL, 0x8d080df5UL, 0x3b6e20c8UL, 0x4c69105eUL, 0xd56041e4UL,
594 0xa2677172UL, 0x3c03e4d1UL, 0x4b04d447UL, 0xd20d85fdUL, 0xa50ab56bUL,
595 0x35b5a8faUL, 0x42b2986cUL, 0xdbbbc9d6UL, 0xacbcf940UL, 0x32d86ce3UL,
596 0x45df5c75UL, 0xdcd60dcfUL, 0xabd13d59UL, 0x26d930acUL, 0x51de003aUL,
597 0xc8d75180UL, 0xbfd06116UL, 0x21b4f4b5UL, 0x56b3c423UL, 0xcfba9599UL,
598 0xb8bda50fUL, 0x2802b89eUL, 0x5f058808UL, 0xc60cd9b2UL, 0xb10be924UL,
599 0x2f6f7c87UL, 0x58684c11UL, 0xc1611dabUL, 0xb6662d3dUL, 0x76dc4190UL,
600 0x01db7106UL, 0x98d220bcUL, 0xefd5102aUL, 0x71b18589UL, 0x06b6b51fUL,
601 0x9fbfe4a5UL, 0xe8b8d433UL, 0x7807c9a2UL, 0x0f00f934UL, 0x9609a88eUL,
602 0xe10e9818UL, 0x7f6a0dbbUL, 0x086d3d2dUL, 0x91646c97UL, 0xe6635c01UL,
603 0x6b6b51f4UL, 0x1c6c6162UL, 0x856530d8UL, 0xf262004eUL, 0x6c0695edUL,
604 0x1b01a57bUL, 0x8208f4c1UL, 0xf50fc457UL, 0x65b0d9c6UL, 0x12b7e950UL,
605 0x8bbeb8eaUL, 0xfcb9887cUL, 0x62dd1ddfUL, 0x15da2d49UL, 0x8cd37cf3UL,
606 0xfbd44c65UL, 0x4db26158UL, 0x3ab551ceUL, 0xa3bc0074UL, 0xd4bb30e2UL,
607 0x4adfa541UL, 0x3dd895d7UL, 0xa4d1c46dUL, 0xd3d6f4fbUL, 0x4369e96aUL,
608 0x346ed9fcUL, 0xad678846UL, 0xda60b8d0UL, 0x44042d73UL, 0x33031de5UL,
609 0xaa0a4c5fUL, 0xdd0d7cc9UL, 0x5005713cUL, 0x270241aaUL, 0xbe0b1010UL,
610 0xc90c2086UL, 0x5768b525UL, 0x206f85b3UL, 0xb966d409UL, 0xce61e49fUL,
611 0x5edef90eUL, 0x29d9c998UL, 0xb0d09822UL, 0xc7d7a8b4UL, 0x59b33d17UL,
612 0x2eb40d81UL, 0xb7bd5c3bUL, 0xc0ba6cadUL, 0xedb88320UL, 0x9abfb3b6UL,
613 0x03b6e20cUL, 0x74b1d29aUL, 0xead54739UL, 0x9dd277afUL, 0x04db2615UL,
614 0x73dc1683UL, 0xe3630b12UL, 0x94643b84UL, 0x0d6d6a3eUL, 0x7a6a5aa8UL,
615 0xe40ecf0bUL, 0x9309ff9dUL, 0x0a00ae27UL, 0x7d079eb1UL, 0xf00f9344UL,
616 0x8708a3d2UL, 0x1e01f268UL, 0x6906c2feUL, 0xf762575dUL, 0x806567cbUL,
617 0x196c3671UL, 0x6e6b06e7UL, 0xfed41b76UL, 0x89d32be0UL, 0x10da7a5aUL,
618 0x67dd4accUL, 0xf9b9df6fUL, 0x8ebeeff9UL, 0x17b7be43UL, 0x60b08ed5UL,
619 0xd6d6a3e8UL, 0xa1d1937eUL, 0x38d8c2c4UL, 0x4fdff252UL, 0xd1bb67f1UL,
620 0xa6bc5767UL, 0x3fb506ddUL, 0x48b2364bUL, 0xd80d2bdaUL, 0xaf0a1b4cUL,
621 0x36034af6UL, 0x41047a60UL, 0xdf60efc3UL, 0xa867df55UL, 0x316e8eefUL,
622 0x4669be79UL, 0xcb61b38cUL, 0xbc66831aUL, 0x256fd2a0UL, 0x5268e236UL,
623 0xcc0c7795UL, 0xbb0b4703UL, 0x220216b9UL, 0x5505262fUL, 0xc5ba3bbeUL,
624 0xb2bd0b28UL, 0x2bb45a92UL, 0x5cb36a04UL, 0xc2d7ffa7UL, 0xb5d0cf31UL,
625 0x2cd99e8bUL, 0x5bdeae1dUL, 0x9b64c2b0UL, 0xec63f226UL, 0x756aa39cUL,
626 0x026d930aUL, 0x9c0906a9UL, 0xeb0e363fUL, 0x72076785UL, 0x05005713UL,
627 0x95bf4a82UL, 0xe2b87a14UL, 0x7bb12baeUL, 0x0cb61b38UL, 0x92d28e9bUL,
628 0xe5d5be0dUL, 0x7cdcefb7UL, 0x0bdbdf21UL, 0x86d3d2d4UL, 0xf1d4e242UL,
629 0x68ddb3f8UL, 0x1fda836eUL, 0x81be16cdUL, 0xf6b9265bUL, 0x6fb077e1UL,
630 0x18b74777UL, 0x88085ae6UL, 0xff0f6a70UL, 0x66063bcaUL, 0x11010b5cUL,
631 0x8f659effUL, 0xf862ae69UL, 0x616bffd3UL, 0x166ccf45UL, 0xa00ae278UL,
632 0xd70dd2eeUL, 0x4e048354UL, 0x3903b3c2UL, 0xa7672661UL, 0xd06016f7UL,
633 0x4969474dUL, 0x3e6e77dbUL, 0xaed16a4aUL, 0xd9d65adcUL, 0x40df0b66UL,
634 0x37d83bf0UL, 0xa9bcae53UL, 0xdebb9ec5UL, 0x47b2cf7fUL, 0x30b5ffe9UL,
635 0xbdbdf21cUL, 0xcabac28aUL, 0x53b39330UL, 0x24b4a3a6UL, 0xbad03605UL,
636 0xcdd70693UL, 0x54de5729UL, 0x23d967bfUL, 0xb3667a2eUL, 0xc4614ab8UL,
637 0x5d681b02UL, 0x2a6f2b94UL, 0xb40bbe37UL, 0xc30c8ea1UL, 0x5a05df1bUL,
638 0x2d02ef8dL
639};
640
641void thread::start (void *(*start_routine)(void *), void *arg)
642{
643 pthread_attr_t attr;
644
645 pthread_attr_init (&attr);
646 pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
647 pthread_attr_setstacksize (&attr, PTHREAD_STACK_MIN < sizeof (long) * 4096
648 ? sizeof (long) * 4096 : PTHREAD_STACK_MIN);
649#ifdef PTHREAD_SCOPE_PROCESS
650 pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS);
651#endif
652
653 sigset_t fullsigset, oldsigset;
654 sigfillset (&fullsigset);
655
656 pthread_sigmask (SIG_SETMASK, &fullsigset, &oldsigset);
657
658 if (pthread_create (&id, &attr, start_routine, arg))
659 cleanup ("unable to create a new thread");
660
661 pthread_sigmask (SIG_SETMASK, &oldsigset, 0);
662}
663

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