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Comparing deliantra/server/common/utils.C (file contents):
Revision 1.14 by root, Thu Sep 14 01:34:41 2006 UTC vs.
Revision 1.99 by root, Tue Jan 3 11:23:41 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 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-devel@real-time.com 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
27#include <cstdlib>
28#include <sys/types.h>
29#include <unistd.h>
30#include <sys/time.h>
31#include <time.h>
32#include <signal.h>
33
28#include <global.h> 34#include <global.h>
29#include <funcpoint.h>
30#include <material.h> 35#include <material.h>
36#include <object.h>
37
38#include <sys/time.h>
39#include <sys/resource.h>
31 40
32#include <glib.h> 41#include <glib.h>
33 42
34/* 43refcnt_base::refcnt_t refcnt_dummy;
35 * The random functions here take luck into account when rolling random 44ssize_t slice_alloc;
36 * dice or numbers. This function has less of an impact the larger the 45
37 * difference becomes in the random numbers. IE, the effect is lessened 46#if !GCC_VERSION(3,4)
38 * on a 1-1000 roll, vs a 1-6 roll. This can be used by crafty programmers, 47int least_significant_bit (uint32_t x)
39 * to specifically disable luck in certain rolls, simply by making the 48{
40 * 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.
41 */ 67 */
68bool
69msg_is_safe (const char *msg)
70{
71 bool safe = true;
42 72
43/* 73 /* Trying to cheat by getting data into the object */
44 * Roll a random number between min and max. Uses op to determine luck, 74 if (!strncmp (msg, "endmsg", sizeof ("endmsg") - 1)
45 * and if goodbad is non-zero, luck increases the roll, if zero, it decreases. 75 || strstr (msg, "\nendmsg"))
46 * Generally, op should be the player/caster/hitter requesting the roll, 76 safe = false;
47 * not the recipient (ie, the poor slob getting hit). [garbled 20010916] 77
48 */ 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 ())
91 {
92 signal (SIGINT , SIG_IGN);
93 signal (SIGTERM, SIG_IGN);
94 signal (SIGABRT, SIG_IGN);
95
96 signal (SIGSEGV, SIG_DFL);
97 signal (SIGBUS , SIG_DFL);
98 signal (SIGILL , SIG_DFL);
99 signal (SIGTRAP, SIG_DFL);
100
101 // try to put corefiles into a subdirectory, if existing, to allow
102 // an administrator to reduce the I/O load.
103 chdir ("cores");
104
105 // try to detach us from as many external dependencies as possible
106 // as coredumping can take time by closing all fd's.
107 {
108 struct rlimit lim;
109
110 if (getrlimit (RLIMIT_NOFILE, &lim))
111 lim.rlim_cur = 1024;
112
113 for (int i = 0; i < lim.rlim_cur; ++i)
114 close (i);
115 }
116
117 {
118 sigset_t empty;
119 sigemptyset (&empty);
120 sigprocmask (SIG_SETMASK, &empty, 0);
121 }
122
123 // try to coredump with SIGTRAP
124 kill (getpid (), SIGTRAP);
125 abort ();
126 }
127
128 LOG (llevError, "fork abort: %s\n", msg);
129}
130
131void *
132salloc_ (int n) throw (std::bad_alloc)
133{
134 void *ptr = g_slice_alloc (n);
135
136 if (!ptr)
137 throw std::bad_alloc ();
138
139 slice_alloc += n;
140 return ptr;
141}
142
143void *
144salloc_ (int n, void *src) throw (std::bad_alloc)
145{
146 void *ptr = salloc_ (n);
147
148 if (src)
149 memcpy (ptr, src, n);
150 else
151 memset (ptr, 0, n);
152
153 return ptr;
154}
155
156/******************************************************************************/
157
158#if DEBUG_SALLOC
159
160#define MAGIC 0xa1b2c35543deadLL
161
162void *
163g_slice_alloc (unsigned long size)
164{
165 unsigned long *p = (unsigned long *) (g_slice_alloc)(size + sizeof (unsigned long));
166 *p++ = size ^ MAGIC;
167 //fprintf (stderr, "g_slice_alloc %ld %p\n", size, p);//D
168 return (void *)p;
169}
170
171void *
172g_slice_alloc0 (unsigned long size)
173{
174 return memset (g_slice_alloc (size), 0, size);
175}
176
177void
178g_slice_free1 (unsigned long size, void *ptr)
179{
180 //fprintf (stderr, "g_slice_free %ld %p\n", size, ptr);//D
181 if (expect_true (ptr))
182 {
183 unsigned long *p = (unsigned long *)ptr;
184 unsigned long s = *--p ^ MAGIC;
185
186 if (size != (unsigned long)(*p ^ MAGIC))
187 {
188 LOG (logBacktrace | llevError, "slice free size (%lx) doesn't match alloc size (%lx)\n", size, s);
189 abort ();
190 }
191
192 *p = MAGIC;
193
194 (g_slice_free1)(s + sizeof (unsigned long), p);
195 }
196}
197
198#endif
199
200/******************************************************************************/
201
202refcnt_buf::refcnt_buf (size_t size)
203{
204 _alloc (size);
205}
206
207refcnt_buf::refcnt_buf (void *data, size_t size)
208{
209 _alloc (size);
210 memcpy (this->data, data, size);
211}
212
213refcnt_buf::~refcnt_buf ()
214{
215 dec ();
216}
217
218refcnt_buf &
219refcnt_buf::operator =(const refcnt_buf &src)
220{
221 dec ();
222 data = src.data;
223 ++_refcnt ();
224 return *this;
225}
226
227/******************************************************************************/
49 228
50int 229int
51random_roll (int min, int max, const object *op, int goodbad) 230assign (char *dst, const char *src, int maxsize)
52{ 231{
53 int omin, diff, luck, base, ran; 232 if (!src)
233 src = "";
54 234
55 omin = min; 235 int len = strlen (src);
56 diff = max - min + 1;
57 ((diff > 2) ? (base = 20) : (base = 50)); /* d2 and d3 are corner cases */
58 236
59 if (max < 1 || diff < 1) 237 if (len >= maxsize)
60 { 238 {
61 LOG (llevError, "Calling random_roll with min=%d max=%d\n", min, max); 239 if (maxsize <= 4)
62 return (min); /* avoids a float exception */
63 }
64
65 ran = RANDOM ();
66
67 if (op->type != PLAYER)
68 return ((ran % diff) + min);
69
70 luck = op->stats.luck;
71 if (RANDOM () % base < MIN (10, abs (luck)))
72 {
73 /* we have a winner */
74 ((luck > 0) ? (luck = 1) : (luck = -1));
75 diff -= luck;
76 if (diff < 1)
77 return (omin); /*check again */
78 ((goodbad) ? (min += luck) : (diff));
79
80 return (MAX (omin, MIN (max, (ran % diff) + min)));
81 }
82 return ((ran % diff) + min);
83}
84
85/*
86 * This is a 64 bit version of random_roll above. This is needed
87 * for exp loss calculations for players changing religions.
88 */
89
90sint64
91random_roll64 (sint64 min, sint64 max, const object *op, int goodbad)
92{
93 sint64 omin, diff, luck, ran;
94 int base;
95
96 omin = min;
97 diff = max - min + 1;
98 ((diff > 2) ? (base = 20) : (base = 50)); /* d2 and d3 are corner cases */
99
100 if (max < 1 || diff < 1)
101 {
102#ifndef WIN32
103 LOG (llevError, "Calling random_roll with min=%lld max=%lld\n", min, max);
104#else
105 LOG (llevError, "Calling random_roll with min=%I64d max=%I64d\n", min, max);
106#endif
107 return (min); /* avoids a float exception */
108 }
109
110 /* Don't know of a portable call to get 64 bit random values.
111 * So make a call to get two 32 bit random numbers, and just to
112 * a little byteshifting. Do make sure the first one is only
113 * 32 bit, so we don't get skewed results
114 */
115 ran = (RANDOM () & 0xffffffff) | ((sint64) RANDOM () << 32);
116
117 if (op->type != PLAYER)
118 return ((ran % diff) + min);
119
120 luck = op->stats.luck;
121 if (RANDOM () % base < MIN (10, abs (luck)))
122 {
123 /* we have a winner */
124 ((luck > 0) ? (luck = 1) : (luck = -1));
125 diff -= luck;
126 if (diff < 1)
127 return (omin); /*check again */
128 ((goodbad) ? (min += luck) : (diff));
129
130 return (MAX (omin, MIN (max, (ran % diff) + min)));
131 }
132 return ((ran % diff) + min);
133}
134
135/*
136 * Roll a number of dice (2d3, 4d6). Uses op to determine luck,
137 * If goodbad is non-zero, luck increases the roll, if zero, it decreases.
138 * Generally, op should be the player/caster/hitter requesting the roll,
139 * not the recipient (ie, the poor slob getting hit).
140 * The args are num D size (ie 4d6) [garbled 20010916]
141 */
142
143int
144die_roll (int num, int size, const object *op, int goodbad)
145{
146 int min, diff, luck, total, i, gotlucky, base, ran;
147
148 diff = size;
149 min = 1;
150 luck = total = gotlucky = 0;
151 ((diff > 2) ? (base = 20) : (base = 50)); /* d2 and d3 are corner cases */
152 if (size < 2 || diff < 1)
153 {
154 LOG (llevError, "Calling die_roll with num=%d size=%d\n", num, size);
155 return (num); /* avoids a float exception */
156 }
157
158 if (op->type == PLAYER)
159 luck = op->stats.luck;
160
161 for (i = 0; i < num; i++)
162 {
163 if (RANDOM () % base < MIN (10, abs (luck)) && !gotlucky)
164 { 240 {
165 /* we have a winner */ 241 memset (dst, '.', maxsize - 2);
166 gotlucky++; 242 dst [maxsize - 1] = 0;
167 ((luck > 0) ? (luck = 1) : (luck = -1));
168 diff -= luck;
169 if (diff < 1)
170 return (num); /*check again */
171 ((goodbad) ? (min += luck) : (diff));
172 ran = RANDOM ();
173 total += MAX (1, MIN (size, (ran % diff) + min));
174 } 243 }
175 else 244 else
176 { 245 {
177 total += RANDOM () % size + 1; 246 memcpy (dst, src, maxsize - 4);
247 memcpy (dst + maxsize - 4, "...", 4);
178 } 248 }
179 }
180 return (total);
181}
182 249
183/* 250 len = maxsize;
184 * Another convenience function. Returns a number between min and max.
185 * It is suggested one use these functions rather than RANDOM()%, as it
186 * would appear that a number of off-by-one-errors exist due to improper
187 * use of %. This should also prevent SIGFPE.
188 */
189
190int
191rndm (int min, int max)
192{
193 int diff;
194
195 diff = max - min + 1;
196 if (max < 1 || diff < 1)
197 return (min);
198
199 return (RANDOM () % diff + min);
200}
201
202/* decay and destroy persihable items in a map */
203
204void
205decay_objects (mapstruct *m)
206{
207 int x, y, destroy;
208 object *op, *otmp;
209
210 if (m->unique)
211 return;
212
213 for (x = 0; x < MAP_WIDTH (m); x++)
214 for (y = 0; y < MAP_HEIGHT (m); y++)
215 for (op = get_map_ob (m, x, y); op; op = otmp)
216 {
217 destroy = 0;
218 otmp = op->above;
219 if (QUERY_FLAG (op, FLAG_IS_FLOOR) && QUERY_FLAG (op, FLAG_UNIQUE))
220 break;
221 if (QUERY_FLAG (op, FLAG_IS_FLOOR) ||
222 QUERY_FLAG (op, FLAG_OBJ_ORIGINAL) ||
223 QUERY_FLAG (op, FLAG_OBJ_SAVE_ON_OVL) ||
224 QUERY_FLAG (op, FLAG_UNIQUE) || QUERY_FLAG (op, FLAG_OVERLAY_FLOOR) || QUERY_FLAG (op, FLAG_UNPAID) || IS_LIVE (op))
225 continue;
226 /* otherwise, we decay and destroy */
227 if (IS_WEAPON (op))
228 {
229 op->stats.dam--;
230 if (op->stats.dam < 0)
231 destroy = 1;
232 }
233 else if (IS_ARMOR (op))
234 {
235 op->stats.ac--;
236 if (op->stats.ac < 0)
237 destroy = 1;
238 }
239 else if (op->type == FOOD)
240 {
241 op->stats.food -= rndm (5, 20);
242 if (op->stats.food < 0)
243 destroy = 1;
244 }
245 else
246 {
247 if (op->material & M_PAPER || op->material & M_LEATHER ||
248 op->material & M_WOOD || op->material & M_ORGANIC || op->material & M_CLOTH || op->material & M_LIQUID)
249 destroy = 1;
250 if (op->material & M_IRON && rndm (1, 5) == 1)
251 destroy = 1;
252 if (op->material & M_GLASS && rndm (1, 2) == 1)
253 destroy = 1;
254 if ((op->material & M_STONE || op->material & M_ADAMANT) && rndm (1, 10) == 1)
255 destroy = 1;
256 if ((op->material & M_SOFT_METAL || op->material & M_BONE) && rndm (1, 3) == 1)
257 destroy = 1;
258 if (op->material & M_ICE && MAP_TEMP (m) > 32)
259 destroy = 1;
260 }
261 /* adjust overall chance below */
262 if (destroy && rndm (0, 1))
263 {
264 remove_ob (op);
265 free_object (op);
266 }
267 }
268}
269
270/* convert materialname to materialtype_t */
271
272materialtype_t *
273name_to_material (const char *name)
274{
275 materialtype_t *mt, *nmt;
276
277 mt = NULL;
278 for (nmt = materialt; nmt != NULL && nmt->next != NULL; nmt = nmt->next)
279 {
280 if (strcmp (name, nmt->name) == 0)
281 {
282 mt = nmt;
283 break;
284 }
285 }
286 return mt;
287}
288
289/* when doing transmutation of objects, we have to recheck the resistances,
290 * as some that did not apply previously, may apply now.
291 */
292
293void
294transmute_materialname (object *op, const object *change)
295{
296 materialtype_t *mt;
297 int j;
298
299 if (op->materialname == NULL)
300 return;
301
302 if (change->materialname != NULL && strcmp (op->materialname, change->materialname))
303 return;
304
305 if (!IS_ARMOR (op))
306 return;
307
308 mt = name_to_material (op->materialname);
309 if (!mt)
310 {
311 LOG (llevError, "archetype '%s>%s' uses nonexistent material '%s'\n", &op->arch->name, &op->name, &op->materialname);
312 return;
313 }
314
315 for (j = 0; j < NROFATTACKS; j++)
316 if (op->resist[j] == 0 && change->resist[j] != 0)
317 {
318 op->resist[j] += mt->mod[j];
319 if (op->resist[j] > 100)
320 op->resist[j] = 100;
321 if (op->resist[j] < -100)
322 op->resist[j] = -100;
323 }
324}
325
326/* set the materialname and type for an item */
327void
328set_materialname (object *op, int difficulty, materialtype_t *nmt)
329{
330 materialtype_t *mt, *lmt;
331
332#ifdef NEW_MATERIAL_CODE
333 int j;
334#endif
335
336 if (op->materialname != NULL)
337 return;
338
339
340
341 if (nmt == NULL)
342 {
343 lmt = NULL;
344#ifndef NEW_MATERIAL_CODE
345 for (mt = materialt; mt != NULL && mt->next != NULL; mt = mt->next)
346 {
347 if (op->material & mt->material)
348 {
349 lmt = mt;
350 break;
351 }
352 }
353
354#else
355 for (mt = materialt; mt != NULL && mt->next != NULL; mt = mt->next)
356 {
357 if (op->material & mt->material && rndm (1, 100) <= mt->chance &&
358 difficulty >= mt->difficulty && (op->magic >= mt->magic || mt->magic == 0))
359 {
360 lmt = mt;
361 if (!(IS_WEAPON (op) || IS_ARMOR (op)))
362 break;
363 }
364 }
365#endif
366 } 251 }
367 else 252 else
368 { 253 memcpy (dst, src, ++len);
369 lmt = nmt;
370 }
371 254
372 if (lmt != NULL) 255 return len;
373 { 256}
374#ifndef NEW_MATERIAL_CODE 257
375 op->materialname = lmt->name; 258char *
259vformat (const char *format, va_list ap)
260{
261 static dynbuf_text bufs[8];
262 static int bufidx;
263
264 dynbuf_text &buf = bufs [++bufidx & 7];
265
266 buf.clear ();
267 buf.vprintf (format, ap);
268 return buf;
269}
270
271char *
272format (const char *format, ...)
273{
274 va_list ap;
275 va_start (ap, format);
276 char *buf = vformat (format, ap);
277 va_end (ap);
278
279 return buf;
280}
281
282tstamp
283now ()
284{
285 struct timeval tv;
286
287 gettimeofday (&tv, 0);
288 return tstamp (tv.tv_sec) + tstamp (tv.tv_usec) * tstamp (1e-6);
289}
290
291int
292similar_direction (int a, int b)
293{
294 if (!a || !b)
376 return; 295 return 0;
377#else
378 296
379 if (op->stats.dam && IS_WEAPON (op)) 297 int diff = (b - a) & 7;
380 { 298 return diff <= 1 || diff >= 7;
381 op->stats.dam += lmt->damage; 299}
382 if (op->stats.dam < 1) 300
383 op->stats.dam = 1; 301/* crc32 0xdebb20e3 table and supplementary functions. */
384 } 302extern const uint32_t crc_32_tab[256] =
385 if (op->stats.sp && op->type == BOW) 303{
386 op->stats.sp += lmt->sp; 304 0x00000000UL, 0x77073096UL, 0xee0e612cUL, 0x990951baUL, 0x076dc419UL,
387 if (op->stats.wc && IS_WEAPON (op)) 305 0x706af48fUL, 0xe963a535UL, 0x9e6495a3UL, 0x0edb8832UL, 0x79dcb8a4UL,
388 op->stats.wc += lmt->wc; 306 0xe0d5e91eUL, 0x97d2d988UL, 0x09b64c2bUL, 0x7eb17cbdUL, 0xe7b82d07UL,
389 if (IS_ARMOR (op)) 307 0x90bf1d91UL, 0x1db71064UL, 0x6ab020f2UL, 0xf3b97148UL, 0x84be41deUL,
390 { 308 0x1adad47dUL, 0x6ddde4ebUL, 0xf4d4b551UL, 0x83d385c7UL, 0x136c9856UL,
391 if (op->stats.ac) 309 0x646ba8c0UL, 0xfd62f97aUL, 0x8a65c9ecUL, 0x14015c4fUL, 0x63066cd9UL,
392 op->stats.ac += lmt->ac; 310 0xfa0f3d63UL, 0x8d080df5UL, 0x3b6e20c8UL, 0x4c69105eUL, 0xd56041e4UL,
393 for (j = 0; j < NROFATTACKS; j++) 311 0xa2677172UL, 0x3c03e4d1UL, 0x4b04d447UL, 0xd20d85fdUL, 0xa50ab56bUL,
394 if (op->resist[j] != 0) 312 0x35b5a8faUL, 0x42b2986cUL, 0xdbbbc9d6UL, 0xacbcf940UL, 0x32d86ce3UL,
395 { 313 0x45df5c75UL, 0xdcd60dcfUL, 0xabd13d59UL, 0x26d930acUL, 0x51de003aUL,
396 op->resist[j] += lmt->mod[j]; 314 0xc8d75180UL, 0xbfd06116UL, 0x21b4f4b5UL, 0x56b3c423UL, 0xcfba9599UL,
397 if (op->resist[j] > 100) 315 0xb8bda50fUL, 0x2802b89eUL, 0x5f058808UL, 0xc60cd9b2UL, 0xb10be924UL,
398 op->resist[j] = 100; 316 0x2f6f7c87UL, 0x58684c11UL, 0xc1611dabUL, 0xb6662d3dUL, 0x76dc4190UL,
399 if (op->resist[j] < -100) 317 0x01db7106UL, 0x98d220bcUL, 0xefd5102aUL, 0x71b18589UL, 0x06b6b51fUL,
400 op->resist[j] = -100; 318 0x9fbfe4a5UL, 0xe8b8d433UL, 0x7807c9a2UL, 0x0f00f934UL, 0x9609a88eUL,
401 } 319 0xe10e9818UL, 0x7f6a0dbbUL, 0x086d3d2dUL, 0x91646c97UL, 0xe6635c01UL,
402 } 320 0x6b6b51f4UL, 0x1c6c6162UL, 0x856530d8UL, 0xf262004eUL, 0x6c0695edUL,
403 op->materialname = add_string (lmt->name); 321 0x1b01a57bUL, 0x8208f4c1UL, 0xf50fc457UL, 0x65b0d9c6UL, 0x12b7e950UL,
404 /* dont make it unstackable if it doesn't need to be */ 322 0x8bbeb8eaUL, 0xfcb9887cUL, 0x62dd1ddfUL, 0x15da2d49UL, 0x8cd37cf3UL,
405 if (IS_WEAPON (op) || IS_ARMOR (op)) 323 0xfbd44c65UL, 0x4db26158UL, 0x3ab551ceUL, 0xa3bc0074UL, 0xd4bb30e2UL,
406 { 324 0x4adfa541UL, 0x3dd895d7UL, 0xa4d1c46dUL, 0xd3d6f4fbUL, 0x4369e96aUL,
407 op->weight = (op->weight * lmt->weight) / 100; 325 0x346ed9fcUL, 0xad678846UL, 0xda60b8d0UL, 0x44042d73UL, 0x33031de5UL,
408 op->value = (op->value * lmt->value) / 100; 326 0xaa0a4c5fUL, 0xdd0d7cc9UL, 0x5005713cUL, 0x270241aaUL, 0xbe0b1010UL,
409 } 327 0xc90c2086UL, 0x5768b525UL, 0x206f85b3UL, 0xb966d409UL, 0xce61e49fUL,
328 0x5edef90eUL, 0x29d9c998UL, 0xb0d09822UL, 0xc7d7a8b4UL, 0x59b33d17UL,
329 0x2eb40d81UL, 0xb7bd5c3bUL, 0xc0ba6cadUL, 0xedb88320UL, 0x9abfb3b6UL,
330 0x03b6e20cUL, 0x74b1d29aUL, 0xead54739UL, 0x9dd277afUL, 0x04db2615UL,
331 0x73dc1683UL, 0xe3630b12UL, 0x94643b84UL, 0x0d6d6a3eUL, 0x7a6a5aa8UL,
332 0xe40ecf0bUL, 0x9309ff9dUL, 0x0a00ae27UL, 0x7d079eb1UL, 0xf00f9344UL,
333 0x8708a3d2UL, 0x1e01f268UL, 0x6906c2feUL, 0xf762575dUL, 0x806567cbUL,
334 0x196c3671UL, 0x6e6b06e7UL, 0xfed41b76UL, 0x89d32be0UL, 0x10da7a5aUL,
335 0x67dd4accUL, 0xf9b9df6fUL, 0x8ebeeff9UL, 0x17b7be43UL, 0x60b08ed5UL,
336 0xd6d6a3e8UL, 0xa1d1937eUL, 0x38d8c2c4UL, 0x4fdff252UL, 0xd1bb67f1UL,
337 0xa6bc5767UL, 0x3fb506ddUL, 0x48b2364bUL, 0xd80d2bdaUL, 0xaf0a1b4cUL,
338 0x36034af6UL, 0x41047a60UL, 0xdf60efc3UL, 0xa867df55UL, 0x316e8eefUL,
339 0x4669be79UL, 0xcb61b38cUL, 0xbc66831aUL, 0x256fd2a0UL, 0x5268e236UL,
340 0xcc0c7795UL, 0xbb0b4703UL, 0x220216b9UL, 0x5505262fUL, 0xc5ba3bbeUL,
341 0xb2bd0b28UL, 0x2bb45a92UL, 0x5cb36a04UL, 0xc2d7ffa7UL, 0xb5d0cf31UL,
342 0x2cd99e8bUL, 0x5bdeae1dUL, 0x9b64c2b0UL, 0xec63f226UL, 0x756aa39cUL,
343 0x026d930aUL, 0x9c0906a9UL, 0xeb0e363fUL, 0x72076785UL, 0x05005713UL,
344 0x95bf4a82UL, 0xe2b87a14UL, 0x7bb12baeUL, 0x0cb61b38UL, 0x92d28e9bUL,
345 0xe5d5be0dUL, 0x7cdcefb7UL, 0x0bdbdf21UL, 0x86d3d2d4UL, 0xf1d4e242UL,
346 0x68ddb3f8UL, 0x1fda836eUL, 0x81be16cdUL, 0xf6b9265bUL, 0x6fb077e1UL,
347 0x18b74777UL, 0x88085ae6UL, 0xff0f6a70UL, 0x66063bcaUL, 0x11010b5cUL,
348 0x8f659effUL, 0xf862ae69UL, 0x616bffd3UL, 0x166ccf45UL, 0xa00ae278UL,
349 0xd70dd2eeUL, 0x4e048354UL, 0x3903b3c2UL, 0xa7672661UL, 0xd06016f7UL,
350 0x4969474dUL, 0x3e6e77dbUL, 0xaed16a4aUL, 0xd9d65adcUL, 0x40df0b66UL,
351 0x37d83bf0UL, 0xa9bcae53UL, 0xdebb9ec5UL, 0x47b2cf7fUL, 0x30b5ffe9UL,
352 0xbdbdf21cUL, 0xcabac28aUL, 0x53b39330UL, 0x24b4a3a6UL, 0xbad03605UL,
353 0xcdd70693UL, 0x54de5729UL, 0x23d967bfUL, 0xb3667a2eUL, 0xc4614ab8UL,
354 0x5d681b02UL, 0x2a6f2b94UL, 0xb40bbe37UL, 0xc30c8ea1UL, 0x5a05df1bUL,
355 0x2d02ef8dL
356};
357
358void
359thread::start (void *(*start_routine)(void *), void *arg)
360{
361 pthread_attr_t attr;
362
363 pthread_attr_init (&attr);
364 pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
365 pthread_attr_setstacksize (&attr, PTHREAD_STACK_MIN < sizeof (long) * 4096
366 ? sizeof (long) * 4096 : PTHREAD_STACK_MIN);
367#ifdef PTHREAD_SCOPE_PROCESS
368 pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS);
410#endif 369#endif
411 }
412}
413 370
414/* 371 sigset_t fullsigset, oldsigset;
415 * Strip out the media tags from a String. 372 sigfillset (&fullsigset);
416 * Warning the input string will contain the result string
417 */
418void
419strip_media_tag (char *message)
420{
421 int in_tag = 0;
422 char *dest;
423 char *src;
424 373
425 src = dest = message; 374 pthread_sigmask (SIG_SETMASK, &fullsigset, &oldsigset);
426 while (*src != '\0')
427 {
428 if (*src == '[')
429 {
430 in_tag = 1;
431 }
432 else if (in_tag && (*src == ']'))
433 in_tag = 0;
434 else if (!in_tag)
435 {
436 *dest = *src;
437 dest++;
438 }
439 src++;
440 }
441 *dest = '\0';
442}
443 375
444const char * 376 if (pthread_create (&id, &attr, start_routine, arg))
445strrstr (const char *haystack, const char *needle) 377 cleanup ("unable to create a new thread");
446{
447 const char *lastneedle;
448 378
449 lastneedle = NULL; 379 pthread_sigmask (SIG_SETMASK, &oldsigset, 0);
450 while ((haystack = strstr (haystack, needle)) != NULL)
451 {
452 lastneedle = haystack;
453 haystack++;
454 }
455 return lastneedle;
456
457} 380}
458 381
459#define EOL_SIZE (sizeof("\n")-1)
460void
461strip_endline (char *buf)
462{
463 if (strlen (buf) < sizeof ("\n"))
464 {
465 return;
466 }
467 if (!strcmp (buf + strlen (buf) - EOL_SIZE, "\n"))
468 buf[strlen (buf) - EOL_SIZE] = '\0';
469}
470
471/**
472 * Replace in string src all occurrences of key by replacement. The resulting
473 * string is put into result; at most resultsize characters (including the
474 * terminating null character) will be written to result.
475 */
476void
477replace (const char *src, const char *key, const char *replacement, char *result, size_t resultsize)
478{
479 size_t resultlen;
480 size_t keylen;
481
482 /* special case to prevent infinite loop if key==replacement=="" */
483 if (strcmp (key, replacement) == 0)
484 {
485 snprintf (result, resultsize, "%s", src);
486 return;
487 }
488
489 keylen = strlen (key);
490
491 resultlen = 0;
492 while (*src != '\0' && resultlen + 1 < resultsize)
493 {
494 if (strncmp (src, key, keylen) == 0)
495 {
496 snprintf (result + resultlen, resultsize - resultlen, "%s", replacement);
497 resultlen += strlen (result + resultlen);
498 src += keylen;
499 }
500 else
501 {
502 result[resultlen++] = *src++;
503 }
504 }
505 result[resultlen] = '\0';
506}
507
508/**
509 * Taking a string as an argument, mutate it into a string that looks like a list.
510 * a 'list' for the purposes here, is a string of items, seperated by commas, except
511 * for the last entry, which has an 'and' before it, and a full stop (period) after it.
512 * This function will also strip all trailing non alphanumeric characters.
513 * It does not insert an oxford comma.
514 */
515
516void
517make_list_like (char *input)
518{
519 char *p, tmp[MAX_BUF];
520 int i;
521
522 if (!input || strlen (input) > MAX_BUF - 5)
523 return;
524 /* bad stuff would happen if we continued here, the -5 is to make space for ' and ' */
525
526 strncpy (tmp, input, MAX_BUF - 5);
527 /*trim all trailing commas, spaces etc. */
528 for (i = strlen (tmp); !isalnum (tmp[i]) && i >= 0; i--)
529 tmp[i] = '\0';
530
531 strcat (tmp, ".");
532
533 p = strrchr (tmp, ',');
534 if (p)
535 {
536 *p = '\0';
537 strcpy (input, tmp);
538 p++;
539 strcat (input, " and");
540 strcat (input, p);
541 }
542 else
543 strcpy (input, tmp);
544
545 return;
546}
547
548/////////////////////////////////////////////////////////////////////////////
549
550void *alloc (int s) throw (std::bad_alloc)
551{
552 void *p = g_slice_alloc (s);
553
554 if (!p)
555 throw std::bad_alloc ();
556
557 return p;
558}
559
560void assign (char *dst, const char *src, int maxlen)
561{
562 if (!src)
563 src = "";
564
565 int len = strlen (src);
566
567 if (len >= maxlen - 1)
568 {
569 if (maxlen <= 4)
570 {
571 memset (dst, '.', maxlen - 1);
572 dst [maxlen - 1] = 0;
573 }
574 else
575 {
576 memcpy (dst, src, maxlen - 4);
577 memcpy (dst + maxlen - 4, "...", 4);
578 }
579 }
580 else
581 memcpy (dst, src, len + 1);
582}
583

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