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Comparing deliantra/server/common/utils.C (file contents):
Revision 1.39 by pippijn, Mon Jan 15 21:06:18 2007 UTC vs.
Revision 1.95 by root, Fri Mar 26 01:04:44 2010 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 (©) 2005,2006,2007,2008,2009,2010 Marc Alexander Lehmann / Robin Redeker / the Deliantra team
5 * Copyright (C) 2002 Mark Wedel & Crossfire Development Team
6 * Copyright (C) 1992 Frank Tore Johansen
7 * 5 *
8 * This program is free software; you can redistribute it and/or modify 6 * Deliantra is free software: you can redistribute it and/or modify it under
9 * 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
10 * the Free Software Foundation; either version 2 of the License, or 8 * Free Software Foundation, either version 3 of the License, or (at your
11 * (at your option) any later version. 9 * option) any later version.
12 * 10 *
13 * 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,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details. 14 * GNU General Public License for more details.
17 * 15 *
18 * 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
19 * 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
20 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 18 * <http://www.gnu.org/licenses/>.
21 * 19 *
22 * 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>
23 */ 21 */
24 22
25/* 23/*
26 * General convenience functions for crossfire. 24 * General convenience functions for deliantra.
27 */ 25 */
28 26
29#include <cstdlib> 27#include <cstdlib>
30#include <sys/types.h> 28#include <sys/types.h>
31#include <unistd.h> 29#include <unistd.h>
32#include <sys/time.h> 30#include <sys/time.h>
33#include <time.h> 31#include <time.h>
34#include <signal.h> 32#include <signal.h>
35 33
36#include <global.h> 34#include <global.h>
37#include <funcpoint.h>
38#include <material.h> 35#include <material.h>
36#include <object.h>
37
38#include <sys/time.h>
39#include <sys/resource.h>
39 40
40#include <glib.h> 41#include <glib.h>
41 42
42/* 43refcnt_base::refcnt_t refcnt_dummy;
43 * The random functions here take luck into account when rolling random 44ssize_t slice_alloc;
44 * dice or numbers. This function has less of an impact the larger the 45rand_gen rndm, rmg_rndm;
45 * difference becomes in the random numbers. IE, the effect is lessened 46
46 * on a 1-1000 roll, vs a 1-6 roll. This can be used by crafty programmers, 47#if !GCC_VERSION(3,4)
47 * to specifically disable luck in certain rolls, simply by making the 48int least_significant_bit (uint32_t x)
48 * numbers larger (ie, 1d1000 > 500 vs 1d6 > 3) 49{
50 x &= -x; // this isolates the lowest bit
51
52 int r = 0;
53
54 if (x & 0xaaaaaaaa) r += 1;
55 if (x & 0xcccccccc) r += 2;
56 if (x & 0xf0f0f0f0) r += 4;
57 if (x & 0xff00ff00) r += 8;
58 if (x & 0xffff0000) r += 16;
59
60 return r;
61}
62#endif
63
64void
65tausworthe_random_generator::seed (uint32_t seed)
66{
67 state [0] = seed * 69069U; if (state [0] < 2U) state [0] += 2U;
68 state [1] = state [0] * 69069U; if (state [0] < 8U) state [0] += 8U;
69 state [2] = state [1] * 69069U; if (state [0] < 16U) state [0] += 16U;
70 state [3] = state [2] * 69069U; if (state [0] < 128U) state [0] += 128U;
71
72 for (int i = 11; --i; )
73 next ();
74}
75
76uint32_t
77tausworthe_random_generator::next ()
78{
79 state [0] = ((state [0] & 0xFFFFFFFEU) << 18U) ^ (((state [0] << 6U) ^ state [0]) >> 13U);
80 state [1] = ((state [1] & 0xFFFFFFF8U) << 2U) ^ (((state [1] << 2U) ^ state [1]) >> 27U);
81 state [2] = ((state [2] & 0xFFFFFFF0U) << 7U) ^ (((state [2] << 13U) ^ state [2]) >> 21U);
82 state [3] = ((state [3] & 0xFFFFFF80U) << 13U) ^ (((state [3] << 3U) ^ state [3]) >> 12U);
83
84 return state [0] ^ state [1] ^ state [2] ^ state [3];
85}
86
87template<class generator>
88uint32_t
89random_number_generator<generator>::get_range (uint32_t num)
90{
91 return (this->next () * (uint64_t)num) >> 32U;
92}
93
94// return a number within (min .. max)
95template<class generator>
96int
97random_number_generator<generator>::get_range (int r_min, int r_max)
98{
99 return r_min + get_range (max (r_max - r_min + 1, 0));
100}
101
102template struct random_number_generator<tausworthe_random_generator>;
103template struct random_number_generator<xorshift_random_generator>;
104
105/******************************************************************************/
106
107/* Checks a player-provided string which will become the msg property of
108 * an object for dangerous input.
49 */ 109 */
50 110bool
51/* 111msg_is_safe (const char *msg)
52 * Roll a random number between min and max. Uses op to determine luck,
53 * and if goodbad is non-zero, luck increases the roll, if zero, it decreases.
54 * Generally, op should be the player/caster/hitter requesting the roll,
55 * not the recipient (ie, the poor slob getting hit). [garbled 20010916]
56 */
57
58int
59random_roll (int min, int max, const object *op, int goodbad)
60{ 112{
61 int omin, diff, luck, base, ran; 113 bool safe = true;
62 114
63 omin = min; 115 /* Trying to cheat by getting data into the object */
64 diff = max - min + 1; 116 if (!strncmp (msg, "endmsg", sizeof ("endmsg") - 1)
65 ((diff > 2) ? (base = 20) : (base = 50)); /* d2 and d3 are corner cases */ 117 || strstr (msg, "\nendmsg"))
118 safe = false;
66 119
67 if (max < 1 || diff < 1) 120 /* Trying to make the object talk, and potentially access arbitrary code */
68 { 121 if (object::msg_has_dialogue (msg))
69 LOG (llevError, "Calling random_roll with min=%d max=%d\n", min, max); 122 safe = false;
70 return (min); /* avoids a float exception */
71 }
72 123
73 ran = RANDOM ();
74
75 if (op->type != PLAYER)
76 return ((ran % diff) + min);
77
78 luck = op->stats.luck;
79 if (RANDOM () % base < MIN (10, abs (luck)))
80 {
81 /* we have a winner */
82 ((luck > 0) ? (luck = 1) : (luck = -1));
83 diff -= luck;
84 if (diff < 1)
85 return (omin); /*check again */
86 ((goodbad) ? (min += luck) : (diff));
87
88 return (MAX (omin, MIN (max, (ran % diff) + min)));
89 }
90 return ((ran % diff) + min);
91}
92
93/*
94 * This is a 64 bit version of random_roll above. This is needed
95 * for exp loss calculations for players changing religions.
96 */
97
98sint64
99random_roll64 (sint64 min, sint64 max, const object *op, int goodbad)
100{
101 sint64 omin, diff, luck, ran;
102 int base;
103
104 omin = min;
105 diff = max - min + 1;
106 ((diff > 2) ? (base = 20) : (base = 50)); /* d2 and d3 are corner cases */
107
108 if (max < 1 || diff < 1)
109 {
110 LOG (llevError, "Calling random_roll with min=%" PRId64 " max=%" PRId64 "\n", min, max);
111 return (min); /* avoids a float exception */
112 }
113
114 /* Don't know of a portable call to get 64 bit random values.
115 * So make a call to get two 32 bit random numbers, and just to
116 * a little byteshifting. Do make sure the first one is only
117 * 32 bit, so we don't get skewed results
118 */
119 ran = (RANDOM () & 0xffffffff) | ((sint64) RANDOM () << 32);
120
121 if (op->type != PLAYER)
122 return ((ran % diff) + min);
123
124 luck = op->stats.luck;
125 if (RANDOM () % base < MIN (10, abs (luck)))
126 {
127 /* we have a winner */
128 ((luck > 0) ? (luck = 1) : (luck = -1));
129 diff -= luck;
130 if (diff < 1)
131 return (omin); /*check again */
132 ((goodbad) ? (min += luck) : (diff));
133
134 return (MAX (omin, MIN (max, (ran % diff) + min)));
135 }
136 return ((ran % diff) + min);
137}
138
139/*
140 * Roll a number of dice (2d3, 4d6). Uses op to determine luck,
141 * If goodbad is non-zero, luck increases the roll, if zero, it decreases.
142 * Generally, op should be the player/caster/hitter requesting the roll,
143 * not the recipient (ie, the poor slob getting hit).
144 * The args are num D size (ie 4d6) [garbled 20010916]
145 */
146
147int
148die_roll (int num, int size, const object *op, int goodbad)
149{
150 int min, diff, luck, total, i, gotlucky, base, ran;
151
152 diff = size;
153 min = 1;
154 luck = total = gotlucky = 0;
155 ((diff > 2) ? (base = 20) : (base = 50)); /* d2 and d3 are corner cases */
156 if (size < 2 || diff < 1)
157 {
158 LOG (llevError, "Calling die_roll with num=%d size=%d\n", num, size);
159 return (num); /* avoids a float exception */
160 }
161
162 if (op->type == PLAYER)
163 luck = op->stats.luck;
164
165 for (i = 0; i < num; i++)
166 {
167 if (RANDOM () % base < MIN (10, abs (luck)) && !gotlucky)
168 {
169 /* we have a winner */
170 gotlucky++;
171 ((luck > 0) ? (luck = 1) : (luck = -1));
172 diff -= luck;
173 if (diff < 1)
174 return (num); /*check again */
175 ((goodbad) ? (min += luck) : (diff));
176 ran = RANDOM ();
177 total += MAX (1, MIN (size, (ran % diff) + min));
178 }
179 else
180 {
181 total += RANDOM () % size + 1;
182 }
183 }
184 return (total);
185}
186
187/*
188 * Another convenience function. Returns a number between min and max.
189 * It is suggested one use these functions rather than RANDOM()%, as it
190 * would appear that a number of off-by-one-errors exist due to improper
191 * use of %. This should also prevent SIGFPE.
192 */
193
194int
195rndm (int min, int max)
196{
197 int diff;
198
199 diff = max - min + 1;
200 if (max < 1 || diff < 1)
201 return (min);
202
203 return (RANDOM () % diff + min);
204}
205
206/* decay and destroy perishable items in a map */
207void
208maptile::decay_objects ()
209{
210 if (!spaces)
211 return;
212
213 for (mapspace *ms = spaces + size (); ms-- > spaces; )
214 for (object *above, *op = ms->bot; op; op = above)
215 {
216 above = op->above;
217
218 bool destroy = 0;
219
220 // do not decay anything above unique floor tiles (yet :)
221 if (QUERY_FLAG (op, FLAG_IS_FLOOR) && QUERY_FLAG (op, FLAG_UNIQUE))
222 break;
223
224 if (QUERY_FLAG (op, FLAG_IS_FLOOR)
225 || QUERY_FLAG (op, FLAG_OBJ_ORIGINAL)
226 || QUERY_FLAG (op, FLAG_OBJ_SAVE_ON_OVL)
227 || QUERY_FLAG (op, FLAG_UNIQUE)
228 || QUERY_FLAG (op, FLAG_OVERLAY_FLOOR)
229 || QUERY_FLAG (op, FLAG_UNPAID)
230 || op->is_alive ())
231 ; // do not decay
232 else if (op->is_weapon ())
233 {
234 op->stats.dam--;
235 if (op->stats.dam < 0)
236 destroy = 1;
237 }
238 else if (op->is_armor ())
239 {
240 op->stats.ac--;
241 if (op->stats.ac < 0)
242 destroy = 1;
243 }
244 else if (op->type == FOOD)
245 {
246 op->stats.food -= rndm (5, 20);
247 if (op->stats.food < 0)
248 destroy = 1;
249 }
250 else
251 {
252 int mat = op->material;
253
254 if (mat & M_PAPER
255 || mat & M_LEATHER
256 || mat & M_WOOD
257 || mat & M_ORGANIC
258 || mat & M_CLOTH
259 || mat & M_LIQUID
260 || (mat & M_IRON && rndm (1, 5) == 1)
261 || (mat & M_GLASS && rndm (1, 2) == 1)
262 || ((mat & M_STONE || mat & M_ADAMANT) && rndm (1, 10) == 1)
263 || ((mat & M_SOFT_METAL || mat & M_BONE) && rndm (1, 3) == 1)
264 || (mat & M_ICE && temp > 32))
265 destroy = 1;
266 }
267
268 /* adjust overall chance below */
269 if (destroy && rndm (0, 1))
270 op->destroy ();
271 }
272}
273
274/* convert materialname to materialtype_t */
275
276materialtype_t *
277name_to_material (const char *name)
278{
279 materialtype_t *mt, *nmt;
280
281 mt = NULL;
282 for (nmt = materialt; nmt != NULL && nmt->next != NULL; nmt = nmt->next)
283 {
284 if (strcmp (name, nmt->name) == 0)
285 {
286 mt = nmt;
287 break;
288 }
289 }
290 return mt;
291}
292
293/* when doing transmutation of objects, we have to recheck the resistances,
294 * as some that did not apply previously, may apply now.
295 */
296
297void
298transmute_materialname (object *op, const object *change)
299{
300 materialtype_t *mt;
301 int j;
302
303 if (op->materialname == NULL)
304 return;
305
306 if (change->materialname != NULL && strcmp (op->materialname, change->materialname))
307 return;
308
309 if (!op->is_armor ())
310 return;
311
312 mt = name_to_material (op->materialname);
313 if (!mt)
314 {
315 LOG (llevError, "archetype '%s>%s' uses nonexistent material '%s'\n", &op->arch->name, &op->name, &op->materialname);
316 return;
317 }
318
319 for (j = 0; j < NROFATTACKS; j++)
320 if (op->resist[j] == 0 && change->resist[j] != 0)
321 {
322 op->resist[j] += mt->mod[j];
323 if (op->resist[j] > 100)
324 op->resist[j] = 100;
325 if (op->resist[j] < -100)
326 op->resist[j] = -100;
327 }
328}
329
330/* set the materialname and type for an item */
331void
332set_materialname (object *op, int difficulty, materialtype_t *nmt)
333{
334 materialtype_t *mt, *lmt;
335
336#ifdef NEW_MATERIAL_CODE
337 int j;
338#endif
339
340 if (op->materialname != NULL)
341 return;
342
343
344
345 if (nmt == NULL)
346 {
347 lmt = NULL;
348#ifndef NEW_MATERIAL_CODE
349 for (mt = materialt; mt != NULL && mt->next != NULL; mt = mt->next)
350 {
351 if (op->material & mt->material)
352 {
353 lmt = mt;
354 break;
355 }
356 }
357
358#else
359 for (mt = materialt; mt != NULL && mt->next != NULL; mt = mt->next)
360 {
361 if (op->material & mt->material && rndm (1, 100) <= mt->chance &&
362 difficulty >= mt->difficulty && (op->magic >= mt->magic || mt->magic == 0))
363 {
364 lmt = mt;
365 if (!(op->is_weapon () || op->is_armor ()))
366 break;
367 }
368 }
369#endif
370 }
371 else
372 {
373 lmt = nmt;
374 }
375
376 if (lmt != NULL)
377 {
378#ifndef NEW_MATERIAL_CODE
379 op->materialname = lmt->name;
380 return;
381#else
382
383 if (op->stats.dam && op->is_weapon ())
384 {
385 op->stats.dam += lmt->damage;
386 if (op->stats.dam < 1)
387 op->stats.dam = 1;
388 }
389 if (op->stats.sp && op->type == BOW)
390 op->stats.sp += lmt->sp;
391 if (op->stats.wc && op->is_weapon ())
392 op->stats.wc += lmt->wc;
393 if (op->is_armor ())
394 {
395 if (op->stats.ac)
396 op->stats.ac += lmt->ac;
397 for (j = 0; j < NROFATTACKS; j++)
398 if (op->resist[j] != 0)
399 {
400 op->resist[j] += lmt->mod[j];
401 if (op->resist[j] > 100)
402 op->resist[j] = 100;
403 if (op->resist[j] < -100)
404 op->resist[j] = -100;
405 }
406 }
407 op->materialname = add_string (lmt->name);
408 /* dont make it unstackable if it doesn't need to be */
409 if (op->is_weapon () || op->is_armor ())
410 {
411 op->weight = (op->weight * lmt->weight) / 100;
412 op->value = (op->value * lmt->value) / 100;
413 }
414#endif
415 }
416}
417
418/*
419 * Strip out the media tags from a String.
420 * Warning the input string will contain the result string
421 */
422void
423strip_media_tag (char *message)
424{
425 int in_tag = 0;
426 char *dest;
427 char *src;
428
429 src = dest = message;
430 while (*src != '\0')
431 {
432 if (*src == '[')
433 {
434 in_tag = 1;
435 }
436 else if (in_tag && (*src == ']'))
437 in_tag = 0;
438 else if (!in_tag)
439 {
440 *dest = *src;
441 dest++;
442 }
443 src++;
444 }
445 *dest = '\0';
446}
447
448const char *
449strrstr (const char *haystack, const char *needle)
450{
451 const char *lastneedle;
452
453 lastneedle = NULL;
454 while ((haystack = strstr (haystack, needle)) != NULL)
455 {
456 lastneedle = haystack;
457 haystack++;
458 }
459 return lastneedle;
460
461}
462
463#define EOL_SIZE (sizeof("\n")-1)
464void
465strip_endline (char *buf)
466{
467 if (strlen (buf) < sizeof ("\n"))
468 {
469 return;
470 }
471 if (!strcmp (buf + strlen (buf) - EOL_SIZE, "\n"))
472 buf[strlen (buf) - EOL_SIZE] = '\0';
473}
474
475/**
476 * Replace in string src all occurrences of key by replacement. The resulting
477 * string is put into result; at most resultsize characters (including the
478 * terminating null character) will be written to result.
479 */
480void
481replace (const char *src, const char *key, const char *replacement, char *result, size_t resultsize)
482{
483 size_t resultlen;
484 size_t keylen;
485
486 /* special case to prevent infinite loop if key==replacement=="" */
487 if (strcmp (key, replacement) == 0)
488 {
489 snprintf (result, resultsize, "%s", src);
490 return;
491 }
492
493 keylen = strlen (key);
494
495 resultlen = 0;
496 while (*src != '\0' && resultlen + 1 < resultsize)
497 {
498 if (strncmp (src, key, keylen) == 0)
499 {
500 snprintf (result + resultlen, resultsize - resultlen, "%s", replacement);
501 resultlen += strlen (result + resultlen);
502 src += keylen;
503 }
504 else
505 {
506 result[resultlen++] = *src++;
507 }
508 }
509 result[resultlen] = '\0';
510}
511
512/**
513 * Taking a string as an argument, mutate it into a string that looks like a list.
514 * a 'list' for the purposes here, is a string of items, seperated by commas, except
515 * for the last entry, which has an 'and' before it, and a full stop (period) after it.
516 * This function will also strip all trailing non alphanumeric characters.
517 * It does not insert an oxford comma.
518 */
519
520void
521make_list_like (char *input)
522{
523 char *p, tmp[MAX_BUF];
524 int i;
525
526 if (!input || strlen (input) > MAX_BUF - 5)
527 return;
528 /* bad stuff would happen if we continued here, the -5 is to make space for ' and ' */
529
530 strncpy (tmp, input, MAX_BUF - 5);
531 /*trim all trailing commas, spaces etc. */
532 for (i = strlen (tmp); !isalnum (tmp[i]) && i >= 0; i--)
533 tmp[i] = '\0';
534
535 strcat (tmp, ".");
536
537 p = strrchr (tmp, ',');
538 if (p)
539 {
540 *p = '\0';
541 strcpy (input, tmp);
542 p++;
543 strcat (input, " and");
544 strcat (input, p);
545 }
546 else
547 strcpy (input, tmp);
548
549 return; 124 return safe;
550} 125}
551 126
552///////////////////////////////////////////////////////////////////////////// 127/////////////////////////////////////////////////////////////////////////////
553 128
554void 129void
555fork_abort (const char *msg) 130fork_abort (const char *msg)
556{ 131{
557 if (!fork ()) 132 if (!fork ())
558 { 133 {
134 signal (SIGINT , SIG_IGN);
135 signal (SIGTERM, SIG_IGN);
559 signal (SIGABRT, SIG_DFL); 136 signal (SIGABRT, SIG_IGN);
137
138 signal (SIGSEGV, SIG_DFL);
139 signal (SIGBUS , SIG_DFL);
140 signal (SIGILL , SIG_DFL);
141 signal (SIGTRAP, SIG_DFL);
142
143 // try to put corefiles into a subdirectory, if existing, to allow
144 // an administrator to reduce the I/O load.
145 chdir ("cores");
146
147 // try to detach us from as many external dependencies as possible
148 // as coredumping can take time by closing all fd's.
149 {
150 struct rlimit lim;
151
152 if (getrlimit (RLIMIT_NOFILE, &lim))
153 lim.rlim_cur = 1024;
154
155 for (int i = 0; i < lim.rlim_cur; ++i)
156 close (i);
157 }
158
159 {
160 sigset_t empty;
161 sigemptyset (&empty);
162 sigprocmask (SIG_SETMASK, &empty, 0);
163 }
164
165 // try to coredump with SIGTRAP
166 kill (getpid (), SIGTRAP);
560 abort (); 167 abort ();
561 } 168 }
562 169
563 LOG (llevError, "fork abort: %s\n", msg); 170 LOG (llevError, "fork abort: %s\n", msg);
564} 171}
568 void *ptr = g_slice_alloc (n); 175 void *ptr = g_slice_alloc (n);
569 176
570 if (!ptr) 177 if (!ptr)
571 throw std::bad_alloc (); 178 throw std::bad_alloc ();
572 179
180 slice_alloc += n;
573 return ptr; 181 return ptr;
574} 182}
575 183
576void *salloc_ (int n, void *src) throw (std::bad_alloc) 184void *salloc_ (int n, void *src) throw (std::bad_alloc)
577{ 185{
583 memset (ptr, 0, n); 191 memset (ptr, 0, n);
584 192
585 return ptr; 193 return ptr;
586} 194}
587 195
196/******************************************************************************/
197
198#if DEBUG_SALLOC
199
200#define MAGIC 0xa1b2c35543deadLL
201
202void *g_slice_alloc (unsigned long size)
203{
204 unsigned long *p = (unsigned long *) (g_slice_alloc)(size + sizeof (unsigned long));
205 *p++ = size ^ MAGIC;
206 //fprintf (stderr, "g_slice_alloc %ld %p\n", size, p);//D
207 return (void *)p;
208}
209
210void *g_slice_alloc0 (unsigned long size)
211{
212 return memset (g_slice_alloc (size), 0, size);
213}
214
215void g_slice_free1 (unsigned long size, void *ptr)
216{
217 //fprintf (stderr, "g_slice_free %ld %p\n", size, ptr);//D
218 if (expect_true (ptr))
219 {
220 unsigned long *p = (unsigned long *)ptr;
221 unsigned long s = *--p ^ MAGIC;
222
223 if (size != (unsigned long)(*p ^ MAGIC))
224 {
225 LOG (logBacktrace | llevError, "slice free size (%lx) doesn't match alloc size (%lx)\n", size, s);
226 abort ();
227 }
228
229 *p = MAGIC;
230
231 (g_slice_free1)(s + sizeof (unsigned long), p);
232 }
233}
234
235#endif
236
237/******************************************************************************/
238
239int
588void assign (char *dst, const char *src, int maxlen) 240assign (char *dst, const char *src, int maxsize)
589{ 241{
590 if (!src) 242 if (!src)
591 src = ""; 243 src = "";
592 244
593 int len = strlen (src); 245 int len = strlen (src);
594 246
595 if (len >= maxlen - 1) 247 if (len >= maxsize)
596 { 248 {
597 if (maxlen <= 4) 249 if (maxsize <= 4)
598 { 250 {
599 memset (dst, '.', maxlen - 1); 251 memset (dst, '.', maxsize - 2);
600 dst [maxlen - 1] = 0; 252 dst [maxsize - 1] = 0;
601 } 253 }
602 else 254 else
603 { 255 {
604 memcpy (dst, src, maxlen - 4); 256 memcpy (dst, src, maxsize - 4);
605 memcpy (dst + maxlen - 4, "...", 4); 257 memcpy (dst + maxsize - 4, "...", 4);
606 } 258 }
259
260 len = maxsize;
607 } 261 }
608 else 262 else
609 memcpy (dst, src, len + 1); 263 memcpy (dst, src, ++len);
264
265 return len;
266}
267
268char *
269vformat (const char *format, va_list ap)
270{
271 static dynbuf_text buf; buf.clear ();
272 buf.vprintf (format, ap);
273 return buf;
274}
275
276char *
277format (const char *format, ...)
278{
279 va_list ap;
280 va_start (ap, format);
281 char *buf = vformat (format, ap);
282 va_end (ap);
283
284 return buf;
610} 285}
611 286
612tstamp now () 287tstamp now ()
613{ 288{
614 struct timeval tv; 289 struct timeval tv;
625 300
626 int diff = (b - a) & 7; 301 int diff = (b - a) & 7;
627 return diff <= 1 || diff >= 7; 302 return diff <= 1 || diff >= 7;
628} 303}
629 304
305/* crc32 0xdebb20e3 table and supplementary functions. */
306extern const uint32_t crc_32_tab[256] =
307{
308 0x00000000UL, 0x77073096UL, 0xee0e612cUL, 0x990951baUL, 0x076dc419UL,
309 0x706af48fUL, 0xe963a535UL, 0x9e6495a3UL, 0x0edb8832UL, 0x79dcb8a4UL,
310 0xe0d5e91eUL, 0x97d2d988UL, 0x09b64c2bUL, 0x7eb17cbdUL, 0xe7b82d07UL,
311 0x90bf1d91UL, 0x1db71064UL, 0x6ab020f2UL, 0xf3b97148UL, 0x84be41deUL,
312 0x1adad47dUL, 0x6ddde4ebUL, 0xf4d4b551UL, 0x83d385c7UL, 0x136c9856UL,
313 0x646ba8c0UL, 0xfd62f97aUL, 0x8a65c9ecUL, 0x14015c4fUL, 0x63066cd9UL,
314 0xfa0f3d63UL, 0x8d080df5UL, 0x3b6e20c8UL, 0x4c69105eUL, 0xd56041e4UL,
315 0xa2677172UL, 0x3c03e4d1UL, 0x4b04d447UL, 0xd20d85fdUL, 0xa50ab56bUL,
316 0x35b5a8faUL, 0x42b2986cUL, 0xdbbbc9d6UL, 0xacbcf940UL, 0x32d86ce3UL,
317 0x45df5c75UL, 0xdcd60dcfUL, 0xabd13d59UL, 0x26d930acUL, 0x51de003aUL,
318 0xc8d75180UL, 0xbfd06116UL, 0x21b4f4b5UL, 0x56b3c423UL, 0xcfba9599UL,
319 0xb8bda50fUL, 0x2802b89eUL, 0x5f058808UL, 0xc60cd9b2UL, 0xb10be924UL,
320 0x2f6f7c87UL, 0x58684c11UL, 0xc1611dabUL, 0xb6662d3dUL, 0x76dc4190UL,
321 0x01db7106UL, 0x98d220bcUL, 0xefd5102aUL, 0x71b18589UL, 0x06b6b51fUL,
322 0x9fbfe4a5UL, 0xe8b8d433UL, 0x7807c9a2UL, 0x0f00f934UL, 0x9609a88eUL,
323 0xe10e9818UL, 0x7f6a0dbbUL, 0x086d3d2dUL, 0x91646c97UL, 0xe6635c01UL,
324 0x6b6b51f4UL, 0x1c6c6162UL, 0x856530d8UL, 0xf262004eUL, 0x6c0695edUL,
325 0x1b01a57bUL, 0x8208f4c1UL, 0xf50fc457UL, 0x65b0d9c6UL, 0x12b7e950UL,
326 0x8bbeb8eaUL, 0xfcb9887cUL, 0x62dd1ddfUL, 0x15da2d49UL, 0x8cd37cf3UL,
327 0xfbd44c65UL, 0x4db26158UL, 0x3ab551ceUL, 0xa3bc0074UL, 0xd4bb30e2UL,
328 0x4adfa541UL, 0x3dd895d7UL, 0xa4d1c46dUL, 0xd3d6f4fbUL, 0x4369e96aUL,
329 0x346ed9fcUL, 0xad678846UL, 0xda60b8d0UL, 0x44042d73UL, 0x33031de5UL,
330 0xaa0a4c5fUL, 0xdd0d7cc9UL, 0x5005713cUL, 0x270241aaUL, 0xbe0b1010UL,
331 0xc90c2086UL, 0x5768b525UL, 0x206f85b3UL, 0xb966d409UL, 0xce61e49fUL,
332 0x5edef90eUL, 0x29d9c998UL, 0xb0d09822UL, 0xc7d7a8b4UL, 0x59b33d17UL,
333 0x2eb40d81UL, 0xb7bd5c3bUL, 0xc0ba6cadUL, 0xedb88320UL, 0x9abfb3b6UL,
334 0x03b6e20cUL, 0x74b1d29aUL, 0xead54739UL, 0x9dd277afUL, 0x04db2615UL,
335 0x73dc1683UL, 0xe3630b12UL, 0x94643b84UL, 0x0d6d6a3eUL, 0x7a6a5aa8UL,
336 0xe40ecf0bUL, 0x9309ff9dUL, 0x0a00ae27UL, 0x7d079eb1UL, 0xf00f9344UL,
337 0x8708a3d2UL, 0x1e01f268UL, 0x6906c2feUL, 0xf762575dUL, 0x806567cbUL,
338 0x196c3671UL, 0x6e6b06e7UL, 0xfed41b76UL, 0x89d32be0UL, 0x10da7a5aUL,
339 0x67dd4accUL, 0xf9b9df6fUL, 0x8ebeeff9UL, 0x17b7be43UL, 0x60b08ed5UL,
340 0xd6d6a3e8UL, 0xa1d1937eUL, 0x38d8c2c4UL, 0x4fdff252UL, 0xd1bb67f1UL,
341 0xa6bc5767UL, 0x3fb506ddUL, 0x48b2364bUL, 0xd80d2bdaUL, 0xaf0a1b4cUL,
342 0x36034af6UL, 0x41047a60UL, 0xdf60efc3UL, 0xa867df55UL, 0x316e8eefUL,
343 0x4669be79UL, 0xcb61b38cUL, 0xbc66831aUL, 0x256fd2a0UL, 0x5268e236UL,
344 0xcc0c7795UL, 0xbb0b4703UL, 0x220216b9UL, 0x5505262fUL, 0xc5ba3bbeUL,
345 0xb2bd0b28UL, 0x2bb45a92UL, 0x5cb36a04UL, 0xc2d7ffa7UL, 0xb5d0cf31UL,
346 0x2cd99e8bUL, 0x5bdeae1dUL, 0x9b64c2b0UL, 0xec63f226UL, 0x756aa39cUL,
347 0x026d930aUL, 0x9c0906a9UL, 0xeb0e363fUL, 0x72076785UL, 0x05005713UL,
348 0x95bf4a82UL, 0xe2b87a14UL, 0x7bb12baeUL, 0x0cb61b38UL, 0x92d28e9bUL,
349 0xe5d5be0dUL, 0x7cdcefb7UL, 0x0bdbdf21UL, 0x86d3d2d4UL, 0xf1d4e242UL,
350 0x68ddb3f8UL, 0x1fda836eUL, 0x81be16cdUL, 0xf6b9265bUL, 0x6fb077e1UL,
351 0x18b74777UL, 0x88085ae6UL, 0xff0f6a70UL, 0x66063bcaUL, 0x11010b5cUL,
352 0x8f659effUL, 0xf862ae69UL, 0x616bffd3UL, 0x166ccf45UL, 0xa00ae278UL,
353 0xd70dd2eeUL, 0x4e048354UL, 0x3903b3c2UL, 0xa7672661UL, 0xd06016f7UL,
354 0x4969474dUL, 0x3e6e77dbUL, 0xaed16a4aUL, 0xd9d65adcUL, 0x40df0b66UL,
355 0x37d83bf0UL, 0xa9bcae53UL, 0xdebb9ec5UL, 0x47b2cf7fUL, 0x30b5ffe9UL,
356 0xbdbdf21cUL, 0xcabac28aUL, 0x53b39330UL, 0x24b4a3a6UL, 0xbad03605UL,
357 0xcdd70693UL, 0x54de5729UL, 0x23d967bfUL, 0xb3667a2eUL, 0xc4614ab8UL,
358 0x5d681b02UL, 0x2a6f2b94UL, 0xb40bbe37UL, 0xc30c8ea1UL, 0x5a05df1bUL,
359 0x2d02ef8dL
360};
361
362void thread::start (void *(*start_routine)(void *), void *arg)
363{
364 pthread_attr_t attr;
365
366 pthread_attr_init (&attr);
367 pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
368 pthread_attr_setstacksize (&attr, PTHREAD_STACK_MIN < sizeof (long) * 4096
369 ? sizeof (long) * 4096 : PTHREAD_STACK_MIN);
370#ifdef PTHREAD_SCOPE_PROCESS
371 pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS);
372#endif
373
374 sigset_t fullsigset, oldsigset;
375 sigfillset (&fullsigset);
376
377 pthread_sigmask (SIG_SETMASK, &fullsigset, &oldsigset);
378
379 if (pthread_create (&id, &attr, start_routine, arg))
380 cleanup ("unable to create a new thread");
381
382 pthread_sigmask (SIG_SETMASK, &oldsigset, 0);
383}
384

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