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Comparing deliantra/server/common/utils.C (file contents):
Revision 1.74 by root, Fri Apr 11 21:09:52 2008 UTC vs.
Revision 1.93 by root, Wed Nov 4 00:02:48 2009 UTC

1/* 1/*
2 * This file is part of Deliantra, the Roguelike Realtime MMORPG. 2 * This file is part of Deliantra, the Roguelike Realtime MMORPG.
3 * 3 *
4 * Copyright (©) 2005,2006,2007,2008 Marc Alexander Lehmann / Robin Redeker / the Deliantra team 4 * Copyright (©) 2005,2006,2007,2008,2009 Marc Alexander Lehmann / Robin Redeker / the Deliantra team
5 * Copyright (©) 2002,2007 Mark Wedel & Crossfire Development Team
6 * Copyright (©) 1992,2007 Frank Tore Johansen
7 * 5 *
8 * Deliantra 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 3 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, see <http://www.gnu.org/licenses/>. 17 * and the GNU General Public License along with this program. If not, see
18 * <http://www.gnu.org/licenses/>.
20 * 19 *
21 * The authors can be reached via e-mail to <support@deliantra.net> 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 <cstdlib> 27#include <cstdlib>
29#include <sys/types.h> 28#include <sys/types.h>
30#include <unistd.h> 29#include <unistd.h>
31#include <sys/time.h> 30#include <sys/time.h>
32#include <time.h> 31#include <time.h>
33#include <signal.h> 32#include <signal.h>
34 33
35#include <global.h> 34#include <global.h>
36#include <funcpoint.h>
37#include <material.h> 35#include <material.h>
36#include <object.h>
37
38#include <sys/time.h>
39#include <sys/resource.h>
38 40
39#include <glib.h> 41#include <glib.h>
40 42
41refcnt_base::refcnt_t refcnt_dummy; 43refcnt_base::refcnt_t refcnt_dummy;
42ssize_t slice_alloc; 44ssize_t slice_alloc;
43rand_gen rndm; 45rand_gen rndm, rmg_rndm;
44 46
45void 47void
46tausworthe_random_generator::seed (uint32_t seed) 48tausworthe_random_generator::seed (uint32_t seed)
47{ 49{
48 state [0] = seed * 69069U; if (state [0] < 2U) state [0] += 2U; 50 state [0] = seed * 69069U; if (state [0] < 2U) state [0] += 2U;
49 state [1] = state [0] * 69069U; if (state [0] < 8U) state [0] += 8U; 51 state [1] = state [0] * 69069U; if (state [0] < 8U) state [0] += 8U;
50 state [2] = state [1] * 69069U; if (state [0] < 16U) state [0] += 16U; 52 state [2] = state [1] * 69069U; if (state [0] < 16U) state [0] += 16U;
51 state [3] = state [2] * 69069U; if (state [0] < 128U) state [0] += 128U; 53 state [3] = state [2] * 69069U; if (state [0] < 128U) state [0] += 128U;
52 54
53 for (int i = 11; --i; ) 55 for (int i = 11; --i; )
54 operator ()(); 56 next ();
55} 57}
56 58
57uint32_t 59uint32_t
58tausworthe_random_generator::next () 60tausworthe_random_generator::next ()
59{ 61{
63 state [3] = ((state [3] & 0xFFFFFF80U) << 13U) ^ (((state [3] << 3U) ^ state [3]) >> 12U); 65 state [3] = ((state [3] & 0xFFFFFF80U) << 13U) ^ (((state [3] << 3U) ^ state [3]) >> 12U);
64 66
65 return state [0] ^ state [1] ^ state [2] ^ state [3]; 67 return state [0] ^ state [1] ^ state [2] ^ state [3];
66} 68}
67 69
70template<class generator>
68uint32_t 71uint32_t
69tausworthe_random_generator::get_range (uint32_t num) 72random_number_generator<generator>::get_range (uint32_t num)
70{ 73{
71 return (next () * (uint64_t)num) >> 32U; 74 return (this->next () * (uint64_t)num) >> 32U;
72} 75}
73 76
74// return a number within (min .. max) 77// return a number within (min .. max)
78template<class generator>
75int 79int
76tausworthe_random_generator::get_range (int r_min, int r_max) 80random_number_generator<generator>::get_range (int r_min, int r_max)
77{ 81{
78 return r_min + get_range (max (r_max - r_min + 1, 0)); 82 return r_min + get_range (max (r_max - r_min + 1, 0));
79} 83}
80 84
81/* 85template struct random_number_generator<tausworthe_random_generator>;
82 * The random functions here take luck into account when rolling random 86template struct random_number_generator<xorshift_random_generator>;
83 * dice or numbers. This function has less of an impact the larger the 87
84 * difference becomes in the random numbers. IE, the effect is lessened 88/******************************************************************************/
85 * on a 1-1000 roll, vs a 1-6 roll. This can be used by crafty programmers, 89
86 * to specifically disable luck in certain rolls, simply by making the 90/* Checks a player-provided string which will become the msg property of
87 * numbers larger (ie, 1d1000 > 500 vs 1d6 > 3) 91 * an object for dangerous input.
88 */ 92 */
89 93bool
90/* 94msg_is_safe (const char *msg)
91 * Roll a random number between min and max. Uses op to determine luck,
92 * and if goodbad is non-zero, luck increases the roll, if zero, it decreases.
93 * Generally, op should be the player/caster/hitter requesting the roll,
94 * not the recipient (ie, the poor slob getting hit). [garbled 20010916]
95 */
96int
97random_roll (int r_min, int r_max, const object *op, int goodbad)
98{ 95{
99 int base = r_max - r_min > 1 ? 20 : 50; /* d2 and d3 are corner cases */ 96 bool safe = true;
100 97
101 if (r_max < r_min) 98 /* Trying to cheat by getting data into the object */
102 { 99 if (!strncmp (msg, "endmsg", sizeof ("endmsg") - 1)
103 LOG (llevError | logBacktrace, "Calling random_roll with min=%d max=%d\n", r_min, r_max); 100 || strstr (msg, "\nendmsg"))
104 return r_min; 101 safe = false;
105 }
106 102
107 if (op->type == PLAYER) 103 /* Trying to make the object talk, and potentially access arbitrary code */
108 { 104 if (object::msg_has_dialogue (msg))
109 int luck = op->stats.luck; 105 safe = false;
110 106
111 if (rndm (base) < min (10, abs (luck)))
112 {
113 //TODO: take luck into account
114 }
115 }
116
117 return rndm (r_min, r_max);
118}
119
120/*
121 * This is a 64 bit version of random_roll above. This is needed
122 * for exp loss calculations for players changing religions.
123 */
124sint64
125random_roll64 (sint64 min, sint64 max, const object *op, int goodbad)
126{
127 sint64 omin = min;
128 sint64 diff = max - min + 1;
129 int base = diff > 2 ? 20 : 50; /* d2 and d3 are corner cases */
130
131 if (diff < 0)
132 {
133 LOG (llevError | logBacktrace, "Calling random_roll64 with min=%" PRId64 " max=%" PRId64 "\n", min, max);
134 return (min); /* avoids a float exception */
135 }
136
137 /*
138 * Make a call to get two 32 bit unsigned random numbers, and just to
139 * a little bitshifting.
140 */
141 sint64 ran = (sint64) rndm.next () ^ ((sint64) rndm.next () << 31);
142
143 if (op->type != PLAYER)
144 return ((ran % diff) + min);
145
146 int luck = op->stats.luck;
147
148 if (rndm (base) < MIN (10, abs (luck)))
149 {
150 /* we have a winner */
151 ((luck > 0) ? (luck = 1) : (luck = -1));
152 diff -= luck;
153 if (diff < 1)
154 return (omin); /*check again */
155
156 ((goodbad) ? (min += luck) : (diff));
157
158 return (MAX (omin, MIN (max, (ran % diff) + min)));
159 }
160
161 return ran % diff + min;
162}
163
164/*
165 * Roll a number of dice (2d3, 4d6). Uses op to determine luck,
166 * If goodbad is non-zero, luck increases the roll, if zero, it decreases.
167 * Generally, op should be the player/caster/hitter requesting the roll,
168 * not the recipient (ie, the poor slob getting hit).
169 * The args are num D size (ie 4d6) [garbled 20010916]
170 */
171int
172die_roll (int num, int size, const object *op, int goodbad)
173{
174 int min, luck, total, i, gotlucky;
175
176 int diff = size;
177 min = 1;
178 luck = total = gotlucky = 0;
179 int base = diff > 2 ? 20 : 50; /* d2 and d3 are corner cases */
180
181 if (size < 2 || diff < 1)
182 {
183 LOG (llevError, "Calling die_roll with num=%d size=%d\n", num, size);
184 return num; /* avoids a float exception */
185 }
186
187 if (op->type == PLAYER)
188 luck = op->stats.luck;
189
190 for (i = 0; i < num; i++)
191 {
192 if (rndm (base) < MIN (10, abs (luck)) && !gotlucky)
193 {
194 /* we have a winner */
195 gotlucky++;
196 ((luck > 0) ? (luck = 1) : (luck = -1));
197 diff -= luck;
198 if (diff < 1)
199 return (num); /*check again */
200 ((goodbad) ? (min += luck) : (diff));
201 total += MAX (1, MIN (size, rndm (diff) + min));
202 }
203 else
204 total += rndm (size) + 1;
205 }
206
207 return total;
208}
209
210/* convert materialname to materialtype_t */
211
212materialtype_t *
213name_to_material (const shstr &name)
214{
215 for (materialtype_t *mt = materialt; mt && mt->next; mt = mt->next)
216 if (name == mt->name)
217 return mt;
218
219 return 0; 107 return safe;
220}
221
222/* when doing transmutation of objects, we have to recheck the resistances,
223 * as some that did not apply previously, may apply now.
224 */
225void
226transmute_materialname (object *op, const object *change)
227{
228 materialtype_t *mt;
229 int j;
230
231 if (op->materialname == NULL)
232 return;
233
234 if (change->materialname != NULL && strcmp (op->materialname, change->materialname))
235 return;
236
237 if (!op->is_armor ())
238 return;
239
240 mt = name_to_material (op->materialname);
241 if (!mt)
242 {
243 LOG (llevError, "archetype '%s>%s' uses nonexistent material '%s'\n", &op->arch->archname, &op->name, &op->materialname);
244 return;
245 }
246
247 for (j = 0; j < NROFATTACKS; j++)
248 if (op->resist[j] == 0 && change->resist[j] != 0)
249 {
250 op->resist[j] += mt->mod[j];
251 if (op->resist[j] > 100)
252 op->resist[j] = 100;
253 if (op->resist[j] < -100)
254 op->resist[j] = -100;
255 }
256}
257
258/* set the materialname and type for an item */
259void
260set_materialname (object *op, int difficulty, materialtype_t *nmt)
261{
262 materialtype_t *mt, *lmt;
263
264 if (op->materialname != NULL)
265 return;
266
267 if (nmt == NULL)
268 {
269 lmt = NULL;
270
271 for (mt = materialt; mt && mt->next; mt = mt->next)
272 if (op->materials & mt->material && rndm (1, 100) <= mt->chance &&
273 difficulty >= mt->difficulty && (op->magic >= mt->magic || mt->magic == 0))
274 {
275 lmt = mt;
276 if (!(op->is_weapon () || op->is_armor ()))
277 break;
278 }
279 }
280 else
281 lmt = nmt;
282
283 if (lmt != NULL)
284 {
285 if (op->stats.dam && op->is_weapon ())
286 {
287 op->stats.dam += lmt->damage;
288 if (op->stats.dam < 1)
289 op->stats.dam = 1;
290 }
291
292 if (op->stats.sp && op->type == BOW)
293 op->stats.sp += lmt->sp;
294 if (op->stats.wc && op->is_weapon ())
295 op->stats.wc += lmt->wc;
296 if (op->is_armor ())
297 {
298 if (op->stats.ac)
299 op->stats.ac += lmt->ac;
300
301 for (int j = 0; j < NROFATTACKS; j++)
302 if (op->resist[j] != 0)
303 {
304 op->resist[j] += lmt->mod[j];
305 if (op->resist[j] > 100)
306 op->resist[j] = 100;
307 if (op->resist[j] < -100)
308 op->resist[j] = -100;
309 }
310 }
311
312 op->materialname = lmt->name;
313 /* dont make it unstackable if it doesn't need to be */
314 if (op->is_weapon () || op->is_armor ())
315 {
316 op->weight = (op->weight * lmt->weight) / 100;
317 op->value = (op->value * lmt->value) / 100;
318 }
319 }
320}
321
322/*
323 * Strip out the media tags from a String.
324 * Warning the input string will contain the result string
325 */
326void
327strip_media_tag (char *message)
328{
329 int in_tag = 0;
330 char *dest;
331 char *src;
332
333 src = dest = message;
334 while (*src != '\0')
335 {
336 if (*src == '[')
337 {
338 in_tag = 1;
339 }
340 else if (in_tag && (*src == ']'))
341 in_tag = 0;
342 else if (!in_tag)
343 {
344 *dest = *src;
345 dest++;
346 }
347 src++;
348 }
349 *dest = '\0';
350}
351
352const char *
353strrstr (const char *haystack, const char *needle)
354{
355 const char *lastneedle;
356
357 lastneedle = NULL;
358 while ((haystack = strstr (haystack, needle)) != NULL)
359 {
360 lastneedle = haystack;
361 haystack++;
362 }
363 return lastneedle;
364
365}
366
367#define EOL_SIZE (sizeof("\n")-1)
368void
369strip_endline (char *buf)
370{
371 if (strlen (buf) < sizeof ("\n"))
372 {
373 return;
374 }
375 if (!strcmp (buf + strlen (buf) - EOL_SIZE, "\n"))
376 buf[strlen (buf) - EOL_SIZE] = '\0';
377}
378
379/**
380 * Replace in string src all occurrences of key by replacement. The resulting
381 * string is put into result; at most resultsize characters (including the
382 * terminating null character) will be written to result.
383 */
384void
385replace (const char *src, const char *key, const char *replacement, char *result, size_t resultsize)
386{
387 size_t resultlen;
388 size_t keylen;
389
390 /* special case to prevent infinite loop if key==replacement=="" */
391 if (strcmp (key, replacement) == 0)
392 {
393 snprintf (result, resultsize, "%s", src);
394 return;
395 }
396
397 keylen = strlen (key);
398
399 resultlen = 0;
400 while (*src != '\0' && resultlen + 1 < resultsize)
401 {
402 if (strncmp (src, key, keylen) == 0)
403 {
404 snprintf (result + resultlen, resultsize - resultlen, "%s", replacement);
405 resultlen += strlen (result + resultlen);
406 src += keylen;
407 }
408 else
409 {
410 result[resultlen++] = *src++;
411 }
412 }
413 result[resultlen] = '\0';
414}
415
416/**
417 * Taking a string as an argument, mutate it into a string that looks like a list.
418 * a 'list' for the purposes here, is a string of items, seperated by commas, except
419 * for the last entry, which has an 'and' before it, and a full stop (period) after it.
420 * This function will also strip all trailing non alphanumeric characters.
421 * It does not insert an oxford comma.
422 */
423void
424make_list_like (char *input)
425{
426 char *p, tmp[MAX_BUF];
427 int i;
428
429 if (!input || strlen (input) > MAX_BUF - 5)
430 return;
431 /* bad stuff would happen if we continued here, the -5 is to make space for ' and ' */
432
433 strncpy (tmp, input, MAX_BUF - 5);
434 /*trim all trailing commas, spaces etc. */
435 for (i = strlen (tmp); !isalnum (tmp[i]) && i >= 0; i--)
436 tmp[i] = '\0';
437
438 strcat (tmp, ".");
439
440 p = strrchr (tmp, ',');
441 if (p)
442 {
443 *p = '\0';
444 strcpy (input, tmp);
445 p++;
446 strcat (input, " and");
447 strcat (input, p);
448 }
449 else
450 strcpy (input, tmp);
451
452 return;
453} 108}
454 109
455///////////////////////////////////////////////////////////////////////////// 110/////////////////////////////////////////////////////////////////////////////
456 111
457void 112void
458fork_abort (const char *msg) 113fork_abort (const char *msg)
459{ 114{
460 if (!fork ()) 115 if (!fork ())
461 { 116 {
117 signal (SIGINT , SIG_IGN);
118 signal (SIGTERM, SIG_IGN);
462 signal (SIGABRT, SIG_DFL); 119 signal (SIGABRT, SIG_IGN);
120
121 signal (SIGSEGV, SIG_DFL);
122 signal (SIGBUS , SIG_DFL);
123 signal (SIGILL , SIG_DFL);
124 signal (SIGTRAP, SIG_DFL);
125
463 // try to put corefiles into a subdirectory, if existing, to allow 126 // try to put corefiles into a subdirectory, if existing, to allow
464 // an administrator to reduce the I/O load. 127 // an administrator to reduce the I/O load.
465 chdir ("cores"); 128 chdir ("cores");
129
130 // try to detach us from as many external dependencies as possible
131 // as coredumping can take time by closing all fd's.
132 {
133 struct rlimit lim;
134
135 if (getrlimit (RLIMIT_NOFILE, &lim))
136 lim.rlim_cur = 1024;
137
138 for (int i = 0; i < lim.rlim_cur; ++i)
139 close (i);
140 }
141
142 {
143 sigset_t empty;
144 sigemptyset (&empty);
145 sigprocmask (SIG_SETMASK, &empty, 0);
146 }
147
148 // try to coredump with SIGTRAP
149 kill (getpid (), SIGTRAP);
466 abort (); 150 abort ();
467 } 151 }
468 152
469 LOG (llevError, "fork abort: %s\n", msg); 153 LOG (llevError, "fork abort: %s\n", msg);
470} 154}
533 217
534#endif 218#endif
535 219
536/******************************************************************************/ 220/******************************************************************************/
537 221
222int
538void assign (char *dst, const char *src, int maxlen) 223assign (char *dst, const char *src, int maxsize)
539{ 224{
540 if (!src) 225 if (!src)
541 src = ""; 226 src = "";
542 227
543 int len = strlen (src); 228 int len = strlen (src);
544 229
545 if (len >= maxlen - 1) 230 if (len >= maxsize)
546 { 231 {
547 if (maxlen <= 4) 232 if (maxsize <= 4)
548 { 233 {
549 memset (dst, '.', maxlen - 1); 234 memset (dst, '.', maxsize - 2);
550 dst [maxlen - 1] = 0; 235 dst [maxsize - 1] = 0;
551 } 236 }
552 else 237 else
553 { 238 {
554 memcpy (dst, src, maxlen - 4); 239 memcpy (dst, src, maxsize - 4);
555 memcpy (dst + maxlen - 4, "...", 4); 240 memcpy (dst + maxsize - 4, "...", 4);
556 } 241 }
242
243 len = maxsize;
557 } 244 }
558 else 245 else
559 memcpy (dst, src, len + 1); 246 memcpy (dst, src, ++len);
560}
561 247
562const char * 248 return len;
249}
250
251char *
252vformat (const char *format, va_list ap)
253{
254 static dynbuf_text buf; buf.clear ();
255 buf.vprintf (format, ap);
256 return buf;
257}
258
259char *
563format (const char *format, ...) 260format (const char *format, ...)
564{ 261{
565 static dynbuf_text buf;
566
567 buf.clear ();
568
569 va_list ap; 262 va_list ap;
570 va_start (ap, format); 263 va_start (ap, format);
571 buf.vprintf (format, ap); 264 char *buf = vformat (format, ap);
572 va_end (ap); 265 va_end (ap);
573 266
574 return buf; 267 return buf;
575} 268}
576 269
649 0x2d02ef8dL 342 0x2d02ef8dL
650}; 343};
651 344
652void thread::start (void *(*start_routine)(void *), void *arg) 345void thread::start (void *(*start_routine)(void *), void *arg)
653{ 346{
347 pthread_attr_t attr;
348
349 pthread_attr_init (&attr);
350 pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
351 pthread_attr_setstacksize (&attr, PTHREAD_STACK_MIN < sizeof (long) * 4096
352 ? sizeof (long) * 4096 : PTHREAD_STACK_MIN);
353#ifdef PTHREAD_SCOPE_PROCESS
354 pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS);
355#endif
356
654 sigset_t fullsigset, oldsigset; 357 sigset_t fullsigset, oldsigset;
655 sigfillset (&fullsigset); 358 sigfillset (&fullsigset);
656 359
657 pthread_sigmask (SIG_SETMASK, &fullsigset, &oldsigset); 360 pthread_sigmask (SIG_SETMASK, &fullsigset, &oldsigset);
658 361
659 if (pthread_create (&id, 0, start_routine, arg)) 362 if (pthread_create (&id, &attr, start_routine, arg))
660 cleanup ("unable to create a new thread"); 363 cleanup ("unable to create a new thread");
661 364
662 pthread_sigmask (SIG_SETMASK, &oldsigset, 0); 365 pthread_sigmask (SIG_SETMASK, &oldsigset, 0);
663} 366}
367

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