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Comparing deliantra/server/common/utils.C (file contents):
Revision 1.27 by root, Wed Dec 20 09:14:21 2006 UTC vs.
Revision 1.103 by root, Mon Dec 17 02:07:15 2012 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) 2002 Mark Wedel & Crossfire Development Team 4 * Copyright (©) 2005,2006,2007,2008,2009,2010,2011,2012 Marc Alexander Lehmann / Robin Redeker / the Deliantra team
5 Copyright (C) 1992 Frank Tore Johansen 5 *
6 6 * Deliantra is free software: you can redistribute it and/or modify it under
7 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 7 * the terms of the Affero GNU General Public License as published by the
9 the Free Software Foundation; either version 2 of the License, or 8 * Free Software Foundation, either version 3 of the License, or (at your
10 (at your option) any later version. 9 * option) any later version.
11 10 *
12 This program is distributed in the hope that it will be useful, 11 * This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details. 14 * GNU General Public License for more details.
16 15 *
17 You should have received a copy of the GNU General Public License 16 * You should have received a copy of the Affero GNU General Public License
18 along with this program; if not, write to the Free Software 17 * and the GNU General Public License along with this program. If not, see
19 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 18 * <http://www.gnu.org/licenses/>.
20 19 *
21 The authors can be reached via e-mail at <crossfire@schmorp.de> 20 * The authors can be reached via e-mail to <support@deliantra.net>
22*/ 21 */
23 22
24/* 23/*
25 * General convenience functions for crossfire. 24 * General convenience functions for deliantra.
26 */ 25 */
27 26
28#include <global.h> 27#include <cstdlib>
28#include <sys/types.h>
29#include <funcpoint.h> 29#include <unistd.h>
30#include <material.h>
31
32#include <sys/time.h> 30#include <sys/time.h>
33#include <time.h> 31#include <time.h>
32#include <signal.h>
33
34#include <global.h>
35#include <material.h>
36#include <object.h>
37
38#include <sys/time.h>
39#include <sys/resource.h>
40
34#include <glib.h> 41#include <glib.h>
35 42
36/* 43refcnt_base::refcnt_t refcnt_dummy;
37 * The random functions here take luck into account when rolling random 44ssize_t slice_alloc;
38 * dice or numbers. This function has less of an impact the larger the 45
39 * difference becomes in the random numbers. IE, the effect is lessened 46#if !GCC_VERSION(3,4)
40 * on a 1-1000 roll, vs a 1-6 roll. This can be used by crafty programmers, 47int least_significant_bit (uint32_t x)
41 * to specifically disable luck in certain rolls, simply by making the 48{
42 * numbers larger (ie, 1d1000 > 500 vs 1d6 > 3) 49 x &= -x; // this isolates the lowest bit
50
51 int r = 0;
52
53 if (x & 0xaaaaaaaa) r += 1;
54 if (x & 0xcccccccc) r += 2;
55 if (x & 0xf0f0f0f0) r += 4;
56 if (x & 0xff00ff00) r += 8;
57 if (x & 0xffff0000) r += 16;
58
59 return r;
60}
61#endif
62
63/******************************************************************************/
64
65/* Checks a player-provided string which will become the msg property of
66 * an object for dangerous input.
43 */ 67 */
44 68bool
45/* 69msg_is_safe (const char *msg)
46 * 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.
48 * Generally, op should be the player/caster/hitter requesting the roll,
49 * not the recipient (ie, the poor slob getting hit). [garbled 20010916]
50 */
51
52int
53random_roll (int min, int max, const object *op, int goodbad)
54{ 70{
55 int omin, diff, luck, base, ran; 71 bool safe = true;
56 72
57 omin = min; 73 /* Trying to cheat by getting data into the object */
58 diff = max - min + 1; 74 if (!strncmp (msg, "endmsg", sizeof ("endmsg") - 1)
59 ((diff > 2) ? (base = 20) : (base = 50)); /* d2 and d3 are corner cases */ 75 || strstr (msg, "\nendmsg"))
76 safe = false;
60 77
61 if (max < 1 || diff < 1) 78 /* Trying to make the object talk, and potentially access arbitrary code */
79 if (object::msg_has_dialogue (msg))
80 safe = false;
81
82 return safe;
83}
84
85/////////////////////////////////////////////////////////////////////////////
86
87void
88fork_abort (const char *msg)
89{
90 if (!fork ())
62 { 91 {
63 LOG (llevError, "Calling random_roll with min=%d max=%d\n", min, max); 92 signal (SIGINT , SIG_IGN);
64 return (min); /* avoids a float exception */ 93 signal (SIGTERM, SIG_IGN);
94 signal (SIGABRT, SIG_IGN);
95
96 signal (SIGSEGV, SIG_DFL);
97 signal (SIGFPE , SIG_DFL);
98#ifdef SIGBUS
99 signal (SIGBUS , SIG_DFL);
100#endif
101 signal (SIGILL , SIG_DFL);
102 signal (SIGTRAP, SIG_DFL);
103
104 // try to put corefiles into a subdirectory, if existing, to allow
105 // an administrator to reduce the I/O load.
106 chdir ("cores");
107
108 // try to detach us from as many external dependencies as possible
109 // as coredumping can take time by closing all fd's.
110 {
111 struct rlimit lim;
112
113 if (getrlimit (RLIMIT_NOFILE, &lim))
114 lim.rlim_cur = 1024;
115
116 for (int i = 0; i < lim.rlim_cur; ++i)
117 close (i);
118 }
119
120 {
121 sigset_t empty;
122 sigemptyset (&empty);
123 sigprocmask (SIG_SETMASK, &empty, 0);
124 }
125
126 // try to coredump with SIGTRAP
127 kill (getpid (), SIGTRAP);
128 abort ();
65 } 129 }
66 130
67 ran = RANDOM (); 131 LOG (llevError, "fork abort: %s\n", msg);
68
69 if (op->type != PLAYER)
70 return ((ran % diff) + min);
71
72 luck = op->stats.luck;
73 if (RANDOM () % base < MIN (10, abs (luck)))
74 {
75 /* we have a winner */
76 ((luck > 0) ? (luck = 1) : (luck = -1));
77 diff -= luck;
78 if (diff < 1)
79 return (omin); /*check again */
80 ((goodbad) ? (min += luck) : (diff));
81
82 return (MAX (omin, MIN (max, (ran % diff) + min)));
83 }
84 return ((ran % diff) + min);
85} 132}
86 133
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
92sint64
93random_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);
131}
132
133/*
134 * Roll a number of dice (2d3, 4d6). Uses op to determine luck,
135 * If goodbad is non-zero, luck increases the roll, if zero, it decreases.
136 * Generally, op should be the player/caster/hitter requesting the roll,
137 * not the recipient (ie, the poor slob getting hit).
138 * The args are num D size (ie 4d6) [garbled 20010916]
139 */
140
141int
142die_roll (int num, int size, const object *op, int goodbad)
143{
144 int min, diff, luck, total, i, gotlucky, base, ran;
145
146 diff = size;
147 min = 1;
148 luck = total = gotlucky = 0;
149 ((diff > 2) ? (base = 20) : (base = 50)); /* d2 and d3 are corner cases */
150 if (size < 2 || diff < 1)
151 {
152 LOG (llevError, "Calling die_roll with num=%d size=%d\n", num, size);
153 return (num); /* avoids a float exception */
154 }
155
156 if (op->type == PLAYER)
157 luck = op->stats.luck;
158
159 for (i = 0; i < num; i++)
160 {
161 if (RANDOM () % base < MIN (10, abs (luck)) && !gotlucky)
162 {
163 /* we have a winner */
164 gotlucky++;
165 ((luck > 0) ? (luck = 1) : (luck = -1));
166 diff -= luck;
167 if (diff < 1)
168 return (num); /*check again */
169 ((goodbad) ? (min += luck) : (diff));
170 ran = RANDOM ();
171 total += MAX (1, MIN (size, (ran % diff) + min));
172 }
173 else
174 {
175 total += RANDOM () % size + 1;
176 }
177 }
178 return (total);
179}
180
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
188int
189rndm (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 */
201
202void 134void *
203decay_objects (maptile *m)
204{
205 int x, y, destroy;
206 object *op, *otmp;
207
208 if (m->unique)
209 return;
210
211 for (x = 0; x < MAP_WIDTH (m); x++)
212 for (y = 0; y < MAP_HEIGHT (m); y++)
213 for (op = GET_MAP_OB (m, x, y); op; op = otmp)
214 {
215 destroy = 0;
216 otmp = op->above;
217 if (QUERY_FLAG (op, FLAG_IS_FLOOR) && QUERY_FLAG (op, FLAG_UNIQUE))
218 break;
219 if (QUERY_FLAG (op, FLAG_IS_FLOOR)
220 || QUERY_FLAG (op, FLAG_OBJ_ORIGINAL)
221 || QUERY_FLAG (op, FLAG_OBJ_SAVE_ON_OVL)
222 || QUERY_FLAG (op, FLAG_UNIQUE)
223 || QUERY_FLAG (op, FLAG_OVERLAY_FLOOR)
224 || QUERY_FLAG (op, FLAG_UNPAID)
225 || op->is_alive ())
226 continue;
227
228 /* otherwise, we decay and destroy */
229 if (op->is_weapon ())
230 {
231 op->stats.dam--;
232 if (op->stats.dam < 0)
233 destroy = 1;
234 }
235 else if (op->is_armor ())
236 {
237 op->stats.ac--;
238 if (op->stats.ac < 0)
239 destroy = 1;
240 }
241 else if (op->type == FOOD)
242 {
243 op->stats.food -= rndm (5, 20);
244 if (op->stats.food < 0)
245 destroy = 1;
246 }
247 else
248 {
249 if (op->material & M_PAPER || op->material & M_LEATHER ||
250 op->material & M_WOOD || op->material & M_ORGANIC || op->material & M_CLOTH || op->material & M_LIQUID)
251 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 && MAP_TEMP (m) > 32)
261 destroy = 1;
262 }
263 /* adjust overall chance below */
264 if (destroy && rndm (0, 1))
265 op->destroy ();
266 }
267}
268
269/* convert materialname to materialtype_t */
270
271materialtype_t *
272name_to_material (const char *name)
273{
274 materialtype_t *mt, *nmt;
275
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;
286}
287
288/* when doing transmutation of objects, we have to recheck the resistances,
289 * as some that did not apply previously, may apply now.
290 */
291
292void
293transmute_materialname (object *op, const object *change)
294{
295 materialtype_t *mt;
296 int j;
297
298 if (op->materialname == NULL)
299 return;
300
301 if (change->materialname != NULL && strcmp (op->materialname, change->materialname))
302 return;
303
304 if (!op->is_armor ())
305 return;
306
307 mt = name_to_material (op->materialname);
308 if (!mt)
309 {
310 LOG (llevError, "archetype '%s>%s' uses nonexistent material '%s'\n", &op->arch->name, &op->name, &op->materialname);
311 return;
312 }
313
314 for (j = 0; j < NROFATTACKS; j++)
315 if (op->resist[j] == 0 && change->resist[j] != 0)
316 {
317 op->resist[j] += mt->mod[j];
318 if (op->resist[j] > 100)
319 op->resist[j] = 100;
320 if (op->resist[j] < -100)
321 op->resist[j] = -100;
322 }
323}
324
325/* set the materialname and type for an item */
326void
327set_materialname (object *op, int difficulty, materialtype_t *nmt)
328{
329 materialtype_t *mt, *lmt;
330
331#ifdef NEW_MATERIAL_CODE
332 int j;
333#endif
334
335 if (op->materialname != NULL)
336 return;
337
338
339
340 if (nmt == NULL)
341 {
342 lmt = NULL;
343#ifndef NEW_MATERIAL_CODE
344 for (mt = materialt; mt != NULL && mt->next != NULL; mt = mt->next)
345 {
346 if (op->material & mt->material)
347 {
348 lmt = mt;
349 break;
350 }
351 }
352
353#else
354 for (mt = materialt; mt != NULL && mt->next != NULL; mt = mt->next)
355 {
356 if (op->material & mt->material && rndm (1, 100) <= mt->chance &&
357 difficulty >= mt->difficulty && (op->magic >= mt->magic || mt->magic == 0))
358 {
359 lmt = mt;
360 if (!(op->is_weapon () || op->is_armor ()))
361 break;
362 }
363 }
364#endif
365 }
366 else
367 {
368 lmt = nmt;
369 }
370
371 if (lmt != NULL)
372 {
373#ifndef NEW_MATERIAL_CODE
374 op->materialname = lmt->name;
375 return;
376#else
377
378 if (op->stats.dam && op->is_weapon ())
379 {
380 op->stats.dam += lmt->damage;
381 if (op->stats.dam < 1)
382 op->stats.dam = 1;
383 }
384 if (op->stats.sp && op->type == BOW)
385 op->stats.sp += lmt->sp;
386 if (op->stats.wc && op->is_weapon ())
387 op->stats.wc += lmt->wc;
388 if (op->is_armor ())
389 {
390 if (op->stats.ac)
391 op->stats.ac += lmt->ac;
392 for (j = 0; j < NROFATTACKS; j++)
393 if (op->resist[j] != 0)
394 {
395 op->resist[j] += lmt->mod[j];
396 if (op->resist[j] > 100)
397 op->resist[j] = 100;
398 if (op->resist[j] < -100)
399 op->resist[j] = -100;
400 }
401 }
402 op->materialname = add_string (lmt->name);
403 /* dont make it unstackable if it doesn't need to be */
404 if (op->is_weapon () || op->is_armor ())
405 {
406 op->weight = (op->weight * lmt->weight) / 100;
407 op->value = (op->value * lmt->value) / 100;
408 }
409#endif
410 }
411}
412
413/*
414 * Strip out the media tags from a String.
415 * Warning the input string will contain the result string
416 */
417void
418strip_media_tag (char *message)
419{
420 int in_tag = 0;
421 char *dest;
422 char *src;
423
424 src = dest = message;
425 while (*src != '\0')
426 {
427 if (*src == '[')
428 {
429 in_tag = 1;
430 }
431 else if (in_tag && (*src == ']'))
432 in_tag = 0;
433 else if (!in_tag)
434 {
435 *dest = *src;
436 dest++;
437 }
438 src++;
439 }
440 *dest = '\0';
441}
442
443const char *
444strrstr (const char *haystack, const char *needle)
445{
446 const char *lastneedle;
447
448 lastneedle = NULL;
449 while ((haystack = strstr (haystack, needle)) != NULL)
450 {
451 lastneedle = haystack;
452 haystack++;
453 }
454 return lastneedle;
455
456}
457
458#define EOL_SIZE (sizeof("\n")-1)
459void
460strip_endline (char *buf)
461{
462 if (strlen (buf) < sizeof ("\n"))
463 {
464 return;
465 }
466 if (!strcmp (buf + strlen (buf) - EOL_SIZE, "\n"))
467 buf[strlen (buf) - EOL_SIZE] = '\0';
468}
469
470/**
471 * Replace in string src all occurrences of key by replacement. The resulting
472 * string is put into result; at most resultsize characters (including the
473 * terminating null character) will be written to result.
474 */
475void
476replace (const char *src, const char *key, const char *replacement, char *result, size_t resultsize)
477{
478 size_t resultlen;
479 size_t keylen;
480
481 /* special case to prevent infinite loop if key==replacement=="" */
482 if (strcmp (key, replacement) == 0)
483 {
484 snprintf (result, resultsize, "%s", src);
485 return;
486 }
487
488 keylen = strlen (key);
489
490 resultlen = 0;
491 while (*src != '\0' && resultlen + 1 < resultsize)
492 {
493 if (strncmp (src, key, keylen) == 0)
494 {
495 snprintf (result + resultlen, resultsize - resultlen, "%s", replacement);
496 resultlen += strlen (result + resultlen);
497 src += keylen;
498 }
499 else
500 {
501 result[resultlen++] = *src++;
502 }
503 }
504 result[resultlen] = '\0';
505}
506
507/**
508 * Taking a string as an argument, mutate it into a string that looks like a list.
509 * a 'list' for the purposes here, is a string of items, seperated by commas, except
510 * for the last entry, which has an 'and' before it, and a full stop (period) after it.
511 * This function will also strip all trailing non alphanumeric characters.
512 * It does not insert an oxford comma.
513 */
514
515void
516make_list_like (char *input)
517{
518 char *p, tmp[MAX_BUF];
519 int i;
520
521 if (!input || strlen (input) > MAX_BUF - 5)
522 return;
523 /* bad stuff would happen if we continued here, the -5 is to make space for ' and ' */
524
525 strncpy (tmp, input, MAX_BUF - 5);
526 /*trim all trailing commas, spaces etc. */
527 for (i = strlen (tmp); !isalnum (tmp[i]) && i >= 0; i--)
528 tmp[i] = '\0';
529
530 strcat (tmp, ".");
531
532 p = strrchr (tmp, ',');
533 if (p)
534 {
535 *p = '\0';
536 strcpy (input, tmp);
537 p++;
538 strcat (input, " and");
539 strcat (input, p);
540 }
541 else
542 strcpy (input, tmp);
543
544 return;
545}
546
547/////////////////////////////////////////////////////////////////////////////
548
549#if 0
550refcounted *refcounted::rc_first;
551
552refcounted::refcounted ()
553{
554 refcnt = 0;
555 rc_next = rc_first;
556 rc_first = this;
557}
558
559refcounted::~refcounted ()
560{
561 assert (!rc_next);
562 assert (!refcnt);
563}
564#endif
565
566void *salloc_ (int n) throw (std::bad_alloc) 135salloc_ (int n) throw (std::bad_alloc)
567{ 136{
568 void *ptr = g_slice_alloc (n); 137 void *ptr = g_slice_alloc (n);
569 138
570 if (!ptr) 139 if (!ptr)
571 throw std::bad_alloc (); 140 throw std::bad_alloc ();
572 141
142 slice_alloc += n;
573 return ptr; 143 return ptr;
574} 144}
575 145
146void *
576void *salloc_ (int n, void *src) throw (std::bad_alloc) 147salloc_ (int n, void *src) throw (std::bad_alloc)
577{ 148{
578 void *ptr = salloc_ (n); 149 void *ptr = salloc_ (n);
579 150
580 if (src) 151 if (src)
581 memcpy (ptr, src, n); 152 memcpy (ptr, src, n);
583 memset (ptr, 0, n); 154 memset (ptr, 0, n);
584 155
585 return ptr; 156 return ptr;
586} 157}
587 158
159/******************************************************************************/
160
161#if DEBUG_SALLOC
162
163#define MAGIC 0xa1b2c35543deadLL
164
165void *
166g_slice_alloc (unsigned long size)
167{
168 unsigned long *p = (unsigned long *) (g_slice_alloc)(size + sizeof (unsigned long));
169 *p++ = size ^ MAGIC;
170 //fprintf (stderr, "g_slice_alloc %ld %p\n", size, p);//D
171 return (void *)p;
172}
173
174void *
175g_slice_alloc0 (unsigned long size)
176{
177 return memset (g_slice_alloc (size), 0, size);
178}
179
180void
181g_slice_free1 (unsigned long size, void *ptr)
182{
183 //fprintf (stderr, "g_slice_free %ld %p\n", size, ptr);//D
184 if (expect_true (ptr))
185 {
186 unsigned long *p = (unsigned long *)ptr;
187 unsigned long s = *--p ^ MAGIC;
188
189 if (size != (unsigned long)(*p ^ MAGIC))
190 {
191 LOG (logBacktrace | llevError, "slice free size (%lx) doesn't match alloc size (%lx)\n", size, s);
192 abort ();
193 }
194
195 *p = MAGIC;
196
197 (g_slice_free1)(s + sizeof (unsigned long), p);
198 }
199}
200
201#endif
202
203/******************************************************************************/
204
205refcnt_buf::refcnt_buf (size_t size)
206{
207 static uint32_t empty_buf [2] = { 0, 1 }; // 2 == never deallocated
208 data = (char *)empty_buf + overhead;
209 assert (overhead == sizeof (empty_buf));
210 inc ();
211}
212
213refcnt_buf::refcnt_buf (void *data, size_t size)
214{
215 _alloc (size);
216 memcpy (this->data, data, size);
217}
218
219refcnt_buf::~refcnt_buf ()
220{
221 dec ();
222}
223
224void
225refcnt_buf::_dealloc ()
226{
227 sfree<char> (data - overhead, size () + overhead);
228}
229
230refcnt_buf &
231refcnt_buf::operator =(const refcnt_buf &src)
232{
233 dec ();
234 data = src.data;
235 inc ();
236 return *this;
237}
238
239/******************************************************************************/
240
241int
588void assign (char *dst, const char *src, int maxlen) 242assign (char *dst, const char *src, int maxsize)
589{ 243{
590 if (!src) 244 if (!src)
591 src = ""; 245 src = "";
592 246
593 int len = strlen (src); 247 int len = strlen (src);
594 248
595 if (len >= maxlen - 1) 249 if (len >= maxsize)
596 { 250 {
597 if (maxlen <= 4) 251 if (maxsize <= 4)
598 { 252 {
599 memset (dst, '.', maxlen - 1); 253 memset (dst, '.', maxsize - 2);
600 dst [maxlen - 1] = 0; 254 dst [maxsize - 1] = 0;
601 } 255 }
602 else 256 else
603 { 257 {
604 memcpy (dst, src, maxlen - 4); 258 memcpy (dst, src, maxsize - 4);
605 memcpy (dst + maxlen - 4, "...", 4); 259 memcpy (dst + maxsize - 4, "...", 4);
606 } 260 }
261
262 len = maxsize;
607 } 263 }
608 else 264 else
609 memcpy (dst, src, len + 1); 265 memcpy (dst, src, ++len);
610}
611 266
612tstamp now () 267 return len;
268}
269
270char *
271vformat (const char *format, va_list ap)
272{
273 static dynbuf_text bufs[8];
274 static int bufidx;
275
276 dynbuf_text &buf = bufs [++bufidx & 7];
277
278 buf.clear ();
279 buf.vprintf (format, ap);
280 return buf;
281}
282
283char *
284format (const char *format, ...)
285{
286 va_list ap;
287 va_start (ap, format);
288 char *buf = vformat (format, ap);
289 va_end (ap);
290
291 return buf;
292}
293
294tstamp
295now ()
613{ 296{
614 struct timeval tv; 297 struct timeval tv;
615 298
616 gettimeofday (&tv, 0); 299 gettimeofday (&tv, 0);
617 return tstamp (tv.tv_sec) + tstamp (tv.tv_usec) * tstamp (1e-6); 300 return tstamp (tv.tv_sec) + tstamp (tv.tv_usec) * tstamp (1e-6);
618} 301}
619 302
303int
304similar_direction (int a, int b)
305{
306 if (!a || !b)
307 return 0;
308
309 int diff = (b - a) & 7;
310 return diff <= 1 || diff >= 7;
311}
312
313/* crc32 0xdebb20e3 table and supplementary functions. */
314extern const uint32_t crc_32_tab[256] =
315{
316 0x00000000UL, 0x77073096UL, 0xee0e612cUL, 0x990951baUL, 0x076dc419UL,
317 0x706af48fUL, 0xe963a535UL, 0x9e6495a3UL, 0x0edb8832UL, 0x79dcb8a4UL,
318 0xe0d5e91eUL, 0x97d2d988UL, 0x09b64c2bUL, 0x7eb17cbdUL, 0xe7b82d07UL,
319 0x90bf1d91UL, 0x1db71064UL, 0x6ab020f2UL, 0xf3b97148UL, 0x84be41deUL,
320 0x1adad47dUL, 0x6ddde4ebUL, 0xf4d4b551UL, 0x83d385c7UL, 0x136c9856UL,
321 0x646ba8c0UL, 0xfd62f97aUL, 0x8a65c9ecUL, 0x14015c4fUL, 0x63066cd9UL,
322 0xfa0f3d63UL, 0x8d080df5UL, 0x3b6e20c8UL, 0x4c69105eUL, 0xd56041e4UL,
323 0xa2677172UL, 0x3c03e4d1UL, 0x4b04d447UL, 0xd20d85fdUL, 0xa50ab56bUL,
324 0x35b5a8faUL, 0x42b2986cUL, 0xdbbbc9d6UL, 0xacbcf940UL, 0x32d86ce3UL,
325 0x45df5c75UL, 0xdcd60dcfUL, 0xabd13d59UL, 0x26d930acUL, 0x51de003aUL,
326 0xc8d75180UL, 0xbfd06116UL, 0x21b4f4b5UL, 0x56b3c423UL, 0xcfba9599UL,
327 0xb8bda50fUL, 0x2802b89eUL, 0x5f058808UL, 0xc60cd9b2UL, 0xb10be924UL,
328 0x2f6f7c87UL, 0x58684c11UL, 0xc1611dabUL, 0xb6662d3dUL, 0x76dc4190UL,
329 0x01db7106UL, 0x98d220bcUL, 0xefd5102aUL, 0x71b18589UL, 0x06b6b51fUL,
330 0x9fbfe4a5UL, 0xe8b8d433UL, 0x7807c9a2UL, 0x0f00f934UL, 0x9609a88eUL,
331 0xe10e9818UL, 0x7f6a0dbbUL, 0x086d3d2dUL, 0x91646c97UL, 0xe6635c01UL,
332 0x6b6b51f4UL, 0x1c6c6162UL, 0x856530d8UL, 0xf262004eUL, 0x6c0695edUL,
333 0x1b01a57bUL, 0x8208f4c1UL, 0xf50fc457UL, 0x65b0d9c6UL, 0x12b7e950UL,
334 0x8bbeb8eaUL, 0xfcb9887cUL, 0x62dd1ddfUL, 0x15da2d49UL, 0x8cd37cf3UL,
335 0xfbd44c65UL, 0x4db26158UL, 0x3ab551ceUL, 0xa3bc0074UL, 0xd4bb30e2UL,
336 0x4adfa541UL, 0x3dd895d7UL, 0xa4d1c46dUL, 0xd3d6f4fbUL, 0x4369e96aUL,
337 0x346ed9fcUL, 0xad678846UL, 0xda60b8d0UL, 0x44042d73UL, 0x33031de5UL,
338 0xaa0a4c5fUL, 0xdd0d7cc9UL, 0x5005713cUL, 0x270241aaUL, 0xbe0b1010UL,
339 0xc90c2086UL, 0x5768b525UL, 0x206f85b3UL, 0xb966d409UL, 0xce61e49fUL,
340 0x5edef90eUL, 0x29d9c998UL, 0xb0d09822UL, 0xc7d7a8b4UL, 0x59b33d17UL,
341 0x2eb40d81UL, 0xb7bd5c3bUL, 0xc0ba6cadUL, 0xedb88320UL, 0x9abfb3b6UL,
342 0x03b6e20cUL, 0x74b1d29aUL, 0xead54739UL, 0x9dd277afUL, 0x04db2615UL,
343 0x73dc1683UL, 0xe3630b12UL, 0x94643b84UL, 0x0d6d6a3eUL, 0x7a6a5aa8UL,
344 0xe40ecf0bUL, 0x9309ff9dUL, 0x0a00ae27UL, 0x7d079eb1UL, 0xf00f9344UL,
345 0x8708a3d2UL, 0x1e01f268UL, 0x6906c2feUL, 0xf762575dUL, 0x806567cbUL,
346 0x196c3671UL, 0x6e6b06e7UL, 0xfed41b76UL, 0x89d32be0UL, 0x10da7a5aUL,
347 0x67dd4accUL, 0xf9b9df6fUL, 0x8ebeeff9UL, 0x17b7be43UL, 0x60b08ed5UL,
348 0xd6d6a3e8UL, 0xa1d1937eUL, 0x38d8c2c4UL, 0x4fdff252UL, 0xd1bb67f1UL,
349 0xa6bc5767UL, 0x3fb506ddUL, 0x48b2364bUL, 0xd80d2bdaUL, 0xaf0a1b4cUL,
350 0x36034af6UL, 0x41047a60UL, 0xdf60efc3UL, 0xa867df55UL, 0x316e8eefUL,
351 0x4669be79UL, 0xcb61b38cUL, 0xbc66831aUL, 0x256fd2a0UL, 0x5268e236UL,
352 0xcc0c7795UL, 0xbb0b4703UL, 0x220216b9UL, 0x5505262fUL, 0xc5ba3bbeUL,
353 0xb2bd0b28UL, 0x2bb45a92UL, 0x5cb36a04UL, 0xc2d7ffa7UL, 0xb5d0cf31UL,
354 0x2cd99e8bUL, 0x5bdeae1dUL, 0x9b64c2b0UL, 0xec63f226UL, 0x756aa39cUL,
355 0x026d930aUL, 0x9c0906a9UL, 0xeb0e363fUL, 0x72076785UL, 0x05005713UL,
356 0x95bf4a82UL, 0xe2b87a14UL, 0x7bb12baeUL, 0x0cb61b38UL, 0x92d28e9bUL,
357 0xe5d5be0dUL, 0x7cdcefb7UL, 0x0bdbdf21UL, 0x86d3d2d4UL, 0xf1d4e242UL,
358 0x68ddb3f8UL, 0x1fda836eUL, 0x81be16cdUL, 0xf6b9265bUL, 0x6fb077e1UL,
359 0x18b74777UL, 0x88085ae6UL, 0xff0f6a70UL, 0x66063bcaUL, 0x11010b5cUL,
360 0x8f659effUL, 0xf862ae69UL, 0x616bffd3UL, 0x166ccf45UL, 0xa00ae278UL,
361 0xd70dd2eeUL, 0x4e048354UL, 0x3903b3c2UL, 0xa7672661UL, 0xd06016f7UL,
362 0x4969474dUL, 0x3e6e77dbUL, 0xaed16a4aUL, 0xd9d65adcUL, 0x40df0b66UL,
363 0x37d83bf0UL, 0xa9bcae53UL, 0xdebb9ec5UL, 0x47b2cf7fUL, 0x30b5ffe9UL,
364 0xbdbdf21cUL, 0xcabac28aUL, 0x53b39330UL, 0x24b4a3a6UL, 0xbad03605UL,
365 0xcdd70693UL, 0x54de5729UL, 0x23d967bfUL, 0xb3667a2eUL, 0xc4614ab8UL,
366 0x5d681b02UL, 0x2a6f2b94UL, 0xb40bbe37UL, 0xc30c8ea1UL, 0x5a05df1bUL,
367 0x2d02ef8dL
368};
369
370void
371thread::start (void *(*start_routine)(void *), void *arg)
372{
373 pthread_attr_t attr;
374
375 pthread_attr_init (&attr);
376 pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
377 pthread_attr_setstacksize (&attr, PTHREAD_STACK_MIN < sizeof (long) * 4096
378 ? sizeof (long) * 4096 : PTHREAD_STACK_MIN);
379#ifdef PTHREAD_SCOPE_PROCESS
380 pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS);
381#endif
382
383 sigset_t fullsigset, oldsigset;
384 sigfillset (&fullsigset);
385
386 pthread_sigmask (SIG_SETMASK, &fullsigset, &oldsigset);
387
388 if (pthread_create (&id, &attr, start_routine, arg))
389 cleanup ("unable to create a new thread");
390
391 pthread_sigmask (SIG_SETMASK, &oldsigset, 0);
392}
393

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