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Revision 1.35 by root, Mon Jan 1 13:31:46 2007 UTC vs.
Revision 1.94 by root, Wed Nov 11 03:52:44 2009 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 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 45rand_gen rndm, rmg_rndm;
39 * difference becomes in the random numbers. IE, the effect is lessened 46
40 * on a 1-1000 roll, vs a 1-6 roll. This can be used by crafty programmers, 47#if !GCC_VERSION(3,4)
41 * to specifically disable luck in certain rolls, simply by making the 48int least_significant_bit (uint32_t x)
42 * 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.
43 */ 109 */
44 110bool
45/* 111msg_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{ 112{
55 int omin, diff, luck, base, ran; 113 bool safe = true;
56 114
57 omin = min; 115 /* Trying to cheat by getting data into the object */
58 diff = max - min + 1; 116 if (!strncmp (msg, "endmsg", sizeof ("endmsg") - 1)
59 ((diff > 2) ? (base = 20) : (base = 50)); /* d2 and d3 are corner cases */ 117 || strstr (msg, "\nendmsg"))
118 safe = false;
60 119
61 if (max < 1 || diff < 1) 120 /* Trying to make the object talk, and potentially access arbitrary code */
121 if (object::msg_has_dialogue (msg))
122 safe = false;
123
124 return safe;
125}
126
127/////////////////////////////////////////////////////////////////////////////
128
129void
130fork_abort (const char *msg)
131{
132 if (!fork ())
62 { 133 {
63 LOG (llevError, "Calling random_roll with min=%d max=%d\n", min, max); 134 signal (SIGINT , SIG_IGN);
64 return (min); /* avoids a float exception */ 135 signal (SIGTERM, SIG_IGN);
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);
167 abort ();
65 } 168 }
66 169
67 ran = RANDOM (); 170 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} 171}
86
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 perishable items in a map */
201void
202maptile::decay_objects ()
203{
204 if (!spaces)
205 return;
206
207 for (mapspace *ms = spaces + size (); ms-- > spaces; )
208 for (object *above, *op = ms->bot; op; op = above)
209 {
210 above = op->above;
211
212 bool destroy = 0;
213
214 // do not decay anything above unique floor tiles (yet :)
215 if (QUERY_FLAG (op, FLAG_IS_FLOOR) && QUERY_FLAG (op, FLAG_UNIQUE))
216 break;
217
218 if (QUERY_FLAG (op, FLAG_IS_FLOOR)
219 || QUERY_FLAG (op, FLAG_OBJ_ORIGINAL)
220 || QUERY_FLAG (op, FLAG_OBJ_SAVE_ON_OVL)
221 || QUERY_FLAG (op, FLAG_UNIQUE)
222 || QUERY_FLAG (op, FLAG_OVERLAY_FLOOR)
223 || QUERY_FLAG (op, FLAG_UNPAID)
224 || op->is_alive ())
225 ; // do not decay
226 else if (op->is_weapon ())
227 {
228 op->stats.dam--;
229 if (op->stats.dam < 0)
230 destroy = 1;
231 }
232 else if (op->is_armor ())
233 {
234 op->stats.ac--;
235 if (op->stats.ac < 0)
236 destroy = 1;
237 }
238 else if (op->type == FOOD)
239 {
240 op->stats.food -= rndm (5, 20);
241 if (op->stats.food < 0)
242 destroy = 1;
243 }
244 else
245 {
246 int mat = op->material;
247
248 if (mat & M_PAPER
249 || mat & M_LEATHER
250 || mat & M_WOOD
251 || mat & M_ORGANIC
252 || mat & M_CLOTH
253 || mat & M_LIQUID
254 || (mat & M_IRON && rndm (1, 5) == 1)
255 || (mat & M_GLASS && rndm (1, 2) == 1)
256 || ((mat & M_STONE || mat & M_ADAMANT) && rndm (1, 10) == 1)
257 || ((mat & M_SOFT_METAL || mat & M_BONE) && rndm (1, 3) == 1)
258 || (mat & M_ICE && temp > 32))
259 destroy = 1;
260 }
261
262 /* adjust overall chance below */
263 if (destroy && rndm (0, 1))
264 op->destroy ();
265 }
266}
267
268/* convert materialname to materialtype_t */
269
270materialtype_t *
271name_to_material (const char *name)
272{
273 materialtype_t *mt, *nmt;
274
275 mt = NULL;
276 for (nmt = materialt; nmt != NULL && nmt->next != NULL; nmt = nmt->next)
277 {
278 if (strcmp (name, nmt->name) == 0)
279 {
280 mt = nmt;
281 break;
282 }
283 }
284 return mt;
285}
286
287/* when doing transmutation of objects, we have to recheck the resistances,
288 * as some that did not apply previously, may apply now.
289 */
290
291void
292transmute_materialname (object *op, const object *change)
293{
294 materialtype_t *mt;
295 int j;
296
297 if (op->materialname == NULL)
298 return;
299
300 if (change->materialname != NULL && strcmp (op->materialname, change->materialname))
301 return;
302
303 if (!op->is_armor ())
304 return;
305
306 mt = name_to_material (op->materialname);
307 if (!mt)
308 {
309 LOG (llevError, "archetype '%s>%s' uses nonexistent material '%s'\n", &op->arch->name, &op->name, &op->materialname);
310 return;
311 }
312
313 for (j = 0; j < NROFATTACKS; j++)
314 if (op->resist[j] == 0 && change->resist[j] != 0)
315 {
316 op->resist[j] += mt->mod[j];
317 if (op->resist[j] > 100)
318 op->resist[j] = 100;
319 if (op->resist[j] < -100)
320 op->resist[j] = -100;
321 }
322}
323
324/* set the materialname and type for an item */
325void
326set_materialname (object *op, int difficulty, materialtype_t *nmt)
327{
328 materialtype_t *mt, *lmt;
329
330#ifdef NEW_MATERIAL_CODE
331 int j;
332#endif
333
334 if (op->materialname != NULL)
335 return;
336
337
338
339 if (nmt == NULL)
340 {
341 lmt = NULL;
342#ifndef NEW_MATERIAL_CODE
343 for (mt = materialt; mt != NULL && mt->next != NULL; mt = mt->next)
344 {
345 if (op->material & mt->material)
346 {
347 lmt = mt;
348 break;
349 }
350 }
351
352#else
353 for (mt = materialt; mt != NULL && mt->next != NULL; mt = mt->next)
354 {
355 if (op->material & mt->material && rndm (1, 100) <= mt->chance &&
356 difficulty >= mt->difficulty && (op->magic >= mt->magic || mt->magic == 0))
357 {
358 lmt = mt;
359 if (!(op->is_weapon () || op->is_armor ()))
360 break;
361 }
362 }
363#endif
364 }
365 else
366 {
367 lmt = nmt;
368 }
369
370 if (lmt != NULL)
371 {
372#ifndef NEW_MATERIAL_CODE
373 op->materialname = lmt->name;
374 return;
375#else
376
377 if (op->stats.dam && op->is_weapon ())
378 {
379 op->stats.dam += lmt->damage;
380 if (op->stats.dam < 1)
381 op->stats.dam = 1;
382 }
383 if (op->stats.sp && op->type == BOW)
384 op->stats.sp += lmt->sp;
385 if (op->stats.wc && op->is_weapon ())
386 op->stats.wc += lmt->wc;
387 if (op->is_armor ())
388 {
389 if (op->stats.ac)
390 op->stats.ac += lmt->ac;
391 for (j = 0; j < NROFATTACKS; j++)
392 if (op->resist[j] != 0)
393 {
394 op->resist[j] += lmt->mod[j];
395 if (op->resist[j] > 100)
396 op->resist[j] = 100;
397 if (op->resist[j] < -100)
398 op->resist[j] = -100;
399 }
400 }
401 op->materialname = add_string (lmt->name);
402 /* dont make it unstackable if it doesn't need to be */
403 if (op->is_weapon () || op->is_armor ())
404 {
405 op->weight = (op->weight * lmt->weight) / 100;
406 op->value = (op->value * lmt->value) / 100;
407 }
408#endif
409 }
410}
411
412/*
413 * Strip out the media tags from a String.
414 * Warning the input string will contain the result string
415 */
416void
417strip_media_tag (char *message)
418{
419 int in_tag = 0;
420 char *dest;
421 char *src;
422
423 src = dest = message;
424 while (*src != '\0')
425 {
426 if (*src == '[')
427 {
428 in_tag = 1;
429 }
430 else if (in_tag && (*src == ']'))
431 in_tag = 0;
432 else if (!in_tag)
433 {
434 *dest = *src;
435 dest++;
436 }
437 src++;
438 }
439 *dest = '\0';
440}
441
442const char *
443strrstr (const char *haystack, const char *needle)
444{
445 const char *lastneedle;
446
447 lastneedle = NULL;
448 while ((haystack = strstr (haystack, needle)) != NULL)
449 {
450 lastneedle = haystack;
451 haystack++;
452 }
453 return lastneedle;
454
455}
456
457#define EOL_SIZE (sizeof("\n")-1)
458void
459strip_endline (char *buf)
460{
461 if (strlen (buf) < sizeof ("\n"))
462 {
463 return;
464 }
465 if (!strcmp (buf + strlen (buf) - EOL_SIZE, "\n"))
466 buf[strlen (buf) - EOL_SIZE] = '\0';
467}
468
469/**
470 * Replace in string src all occurrences of key by replacement. The resulting
471 * string is put into result; at most resultsize characters (including the
472 * terminating null character) will be written to result.
473 */
474void
475replace (const char *src, const char *key, const char *replacement, char *result, size_t resultsize)
476{
477 size_t resultlen;
478 size_t keylen;
479
480 /* special case to prevent infinite loop if key==replacement=="" */
481 if (strcmp (key, replacement) == 0)
482 {
483 snprintf (result, resultsize, "%s", src);
484 return;
485 }
486
487 keylen = strlen (key);
488
489 resultlen = 0;
490 while (*src != '\0' && resultlen + 1 < resultsize)
491 {
492 if (strncmp (src, key, keylen) == 0)
493 {
494 snprintf (result + resultlen, resultsize - resultlen, "%s", replacement);
495 resultlen += strlen (result + resultlen);
496 src += keylen;
497 }
498 else
499 {
500 result[resultlen++] = *src++;
501 }
502 }
503 result[resultlen] = '\0';
504}
505
506/**
507 * Taking a string as an argument, mutate it into a string that looks like a list.
508 * a 'list' for the purposes here, is a string of items, seperated by commas, except
509 * for the last entry, which has an 'and' before it, and a full stop (period) after it.
510 * This function will also strip all trailing non alphanumeric characters.
511 * It does not insert an oxford comma.
512 */
513
514void
515make_list_like (char *input)
516{
517 char *p, tmp[MAX_BUF];
518 int i;
519
520 if (!input || strlen (input) > MAX_BUF - 5)
521 return;
522 /* bad stuff would happen if we continued here, the -5 is to make space for ' and ' */
523
524 strncpy (tmp, input, MAX_BUF - 5);
525 /*trim all trailing commas, spaces etc. */
526 for (i = strlen (tmp); !isalnum (tmp[i]) && i >= 0; i--)
527 tmp[i] = '\0';
528
529 strcat (tmp, ".");
530
531 p = strrchr (tmp, ',');
532 if (p)
533 {
534 *p = '\0';
535 strcpy (input, tmp);
536 p++;
537 strcat (input, " and");
538 strcat (input, p);
539 }
540 else
541 strcpy (input, tmp);
542
543 return;
544}
545
546/////////////////////////////////////////////////////////////////////////////
547 172
548void *salloc_ (int n) throw (std::bad_alloc) 173void *salloc_ (int n) throw (std::bad_alloc)
549{ 174{
550 void *ptr = g_slice_alloc (n); 175 void *ptr = g_slice_alloc (n);
551 176
552 if (!ptr) 177 if (!ptr)
553 throw std::bad_alloc (); 178 throw std::bad_alloc ();
554 179
180 slice_alloc += n;
555 return ptr; 181 return ptr;
556} 182}
557 183
558void *salloc_ (int n, void *src) throw (std::bad_alloc) 184void *salloc_ (int n, void *src) throw (std::bad_alloc)
559{ 185{
565 memset (ptr, 0, n); 191 memset (ptr, 0, n);
566 192
567 return ptr; 193 return ptr;
568} 194}
569 195
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
570void assign (char *dst, const char *src, int maxlen) 240assign (char *dst, const char *src, int maxsize)
571{ 241{
572 if (!src) 242 if (!src)
573 src = ""; 243 src = "";
574 244
575 int len = strlen (src); 245 int len = strlen (src);
576 246
577 if (len >= maxlen - 1) 247 if (len >= maxsize)
578 { 248 {
579 if (maxlen <= 4) 249 if (maxsize <= 4)
580 { 250 {
581 memset (dst, '.', maxlen - 1); 251 memset (dst, '.', maxsize - 2);
582 dst [maxlen - 1] = 0; 252 dst [maxsize - 1] = 0;
583 } 253 }
584 else 254 else
585 { 255 {
586 memcpy (dst, src, maxlen - 4); 256 memcpy (dst, src, maxsize - 4);
587 memcpy (dst + maxlen - 4, "...", 4); 257 memcpy (dst + maxsize - 4, "...", 4);
588 } 258 }
259
260 len = maxsize;
589 } 261 }
590 else 262 else
591 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;
592} 285}
593 286
594tstamp now () 287tstamp now ()
595{ 288{
596 struct timeval tv; 289 struct timeval tv;
607 300
608 int diff = (b - a) & 7; 301 int diff = (b - a) & 7;
609 return diff <= 1 || diff >= 7; 302 return diff <= 1 || diff >= 7;
610} 303}
611 304
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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