| 1 |
/* |
| 2 |
* CrossFire, A Multiplayer game for X-windows |
| 3 |
* |
| 4 |
* Copyright (C) 2005, 2006, 2007 Marc Lehmann & Crossfire+ Development Team |
| 5 |
* Copyright (C) 2002 Mark Wedel & Crossfire Development Team |
| 6 |
* Copyright (C) 1992 Frank Tore Johansen |
| 7 |
* |
| 8 |
* This program is free software; you can redistribute it and/or modify |
| 9 |
* it under the terms of the GNU General Public License as published by |
| 10 |
* the Free Software Foundation; either version 2 of the License, or |
| 11 |
* (at your option) any later version. |
| 12 |
* |
| 13 |
* This program is distributed in the hope that it will be useful, |
| 14 |
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 |
* GNU General Public License for more details. |
| 17 |
* |
| 18 |
* You should have received a copy of the GNU General Public License |
| 19 |
* along with this program; if not, write to the Free Software |
| 20 |
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 21 |
* |
| 22 |
* The authors can be reached via e-mail at <crossfire@schmorp.de> |
| 23 |
*/ |
| 24 |
|
| 25 |
/* |
| 26 |
* General convenience functions for crossfire. |
| 27 |
*/ |
| 28 |
|
| 29 |
#include <cstdlib> |
| 30 |
#include <sys/types.h> |
| 31 |
#include <unistd.h> |
| 32 |
#include <sys/time.h> |
| 33 |
#include <time.h> |
| 34 |
#include <signal.h> |
| 35 |
|
| 36 |
#include <global.h> |
| 37 |
#include <funcpoint.h> |
| 38 |
#include <material.h> |
| 39 |
|
| 40 |
#include <glib.h> |
| 41 |
|
| 42 |
rand_gen rndm; |
| 43 |
|
| 44 |
void |
| 45 |
tausworthe_random_generator::seed (uint32_t seed) |
| 46 |
{ |
| 47 |
state [0] = max ( 2U, seed * 69069U); |
| 48 |
state [1] = max ( 8U, state [0] * 69069U); |
| 49 |
state [2] = max ( 16U, state [1] * 69069U); |
| 50 |
state [3] = max (128U, state [2] * 69069U); |
| 51 |
|
| 52 |
for (int i = 11; --i; ) |
| 53 |
operator ()(); |
| 54 |
} |
| 55 |
|
| 56 |
uint32_t |
| 57 |
tausworthe_random_generator::next () |
| 58 |
{ |
| 59 |
state [0] = ((state [0] & 0xFFFFFFFEU) << 18U) ^ (((state [0] << 6U) ^ state [0]) >> 13U); |
| 60 |
state [1] = ((state [1] & 0xFFFFFFF8U) << 2U) ^ (((state [1] << 2U) ^ state [1]) >> 27U); |
| 61 |
state [2] = ((state [2] & 0xFFFFFFF0U) << 7U) ^ (((state [2] << 13U) ^ state [2]) >> 21U); |
| 62 |
state [3] = ((state [3] & 0xFFFFFF80U) << 13U) ^ (((state [3] << 3U) ^ state [3]) >> 12U); |
| 63 |
|
| 64 |
return state [0] ^ state [1] ^ state [2] ^ state [3]; |
| 65 |
} |
| 66 |
|
| 67 |
uint32_t |
| 68 |
tausworthe_random_generator::get_range (uint32_t r_max) |
| 69 |
{ |
| 70 |
return next () % r_max; |
| 71 |
} |
| 72 |
|
| 73 |
// return a number within (min .. max) |
| 74 |
int |
| 75 |
tausworthe_random_generator::get_range (int r_min, int r_max) |
| 76 |
{ |
| 77 |
return r_min + (*this) (max (r_max - r_min + 1, 1)); |
| 78 |
} |
| 79 |
|
| 80 |
/* |
| 81 |
* The random functions here take luck into account when rolling random |
| 82 |
* dice or numbers. This function has less of an impact the larger the |
| 83 |
* difference becomes in the random numbers. IE, the effect is lessened |
| 84 |
* on a 1-1000 roll, vs a 1-6 roll. This can be used by crafty programmers, |
| 85 |
* to specifically disable luck in certain rolls, simply by making the |
| 86 |
* numbers larger (ie, 1d1000 > 500 vs 1d6 > 3) |
| 87 |
*/ |
| 88 |
|
| 89 |
/* |
| 90 |
* Roll a random number between min and max. Uses op to determine luck, |
| 91 |
* and if goodbad is non-zero, luck increases the roll, if zero, it decreases. |
| 92 |
* Generally, op should be the player/caster/hitter requesting the roll, |
| 93 |
* not the recipient (ie, the poor slob getting hit). [garbled 20010916] |
| 94 |
*/ |
| 95 |
int |
| 96 |
random_roll (int r_min, int r_max, const object *op, int goodbad) |
| 97 |
{ |
| 98 |
int base = r_max - r_min > 1 ? 20 : 50; /* d2 and d3 are corner cases */ |
| 99 |
|
| 100 |
if (r_max < 1 || r_max < r_min) |
| 101 |
{ |
| 102 |
LOG (llevError, "Calling random_roll with min=%d max=%d\n", r_min, r_max); |
| 103 |
return r_min; |
| 104 |
} |
| 105 |
|
| 106 |
if (op->type == PLAYER) |
| 107 |
{ |
| 108 |
int luck = op->stats.luck; |
| 109 |
|
| 110 |
if (rndm (base) < min (10, abs (luck))) |
| 111 |
{ |
| 112 |
//TODO: take luck into account |
| 113 |
} |
| 114 |
} |
| 115 |
|
| 116 |
return rndm (r_min, r_max); |
| 117 |
} |
| 118 |
|
| 119 |
/* |
| 120 |
* This is a 64 bit version of random_roll above. This is needed |
| 121 |
* for exp loss calculations for players changing religions. |
| 122 |
*/ |
| 123 |
sint64 |
| 124 |
random_roll64 (sint64 min, sint64 max, const object *op, int goodbad) |
| 125 |
{ |
| 126 |
sint64 omin, diff, luck, ran; |
| 127 |
int base; |
| 128 |
|
| 129 |
omin = min; |
| 130 |
diff = max - min + 1; |
| 131 |
((diff > 2) ? (base = 20) : (base = 50)); /* d2 and d3 are corner cases */ |
| 132 |
|
| 133 |
if (max < 1 || diff < 1) |
| 134 |
{ |
| 135 |
LOG (llevError, "Calling random_roll with min=%" PRId64 " max=%" PRId64 "\n", min, max); |
| 136 |
return (min); /* avoids a float exception */ |
| 137 |
} |
| 138 |
|
| 139 |
/* |
| 140 |
* Make a call to get two 32 bit unsigned random numbers, and just to |
| 141 |
* a little bitshifting. |
| 142 |
*/ |
| 143 |
ran = (sint64) rndm.next () ^ ((sint64) rndm.next () << 31); |
| 144 |
|
| 145 |
if (op->type != PLAYER) |
| 146 |
return ((ran % diff) + min); |
| 147 |
|
| 148 |
luck = op->stats.luck; |
| 149 |
if (rndm (base) < MIN (10, abs (luck))) |
| 150 |
{ |
| 151 |
/* we have a winner */ |
| 152 |
((luck > 0) ? (luck = 1) : (luck = -1)); |
| 153 |
diff -= luck; |
| 154 |
if (diff < 1) |
| 155 |
return (omin); /*check again */ |
| 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 |
*/ |
| 171 |
|
| 172 |
int |
| 173 |
die_roll (int num, int size, const object *op, int goodbad) |
| 174 |
{ |
| 175 |
int min, diff, luck, total, i, gotlucky, base; |
| 176 |
|
| 177 |
diff = size; |
| 178 |
min = 1; |
| 179 |
luck = total = gotlucky = 0; |
| 180 |
((diff > 2) ? (base = 20) : (base = 50)); /* d2 and d3 are corner cases */ |
| 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 |
/* decay and destroy perishable items in a map */ |
| 211 |
void |
| 212 |
maptile::decay_objects () |
| 213 |
{ |
| 214 |
if (!spaces) |
| 215 |
return; |
| 216 |
|
| 217 |
for (mapspace *ms = spaces + size (); ms-- > spaces; ) |
| 218 |
for (object *above, *op = ms->bot; op; op = above) |
| 219 |
{ |
| 220 |
above = op->above; |
| 221 |
|
| 222 |
bool destroy = 0; |
| 223 |
|
| 224 |
// do not decay anything above unique floor tiles (yet :) |
| 225 |
if (QUERY_FLAG (op, FLAG_IS_FLOOR) && QUERY_FLAG (op, FLAG_UNIQUE)) |
| 226 |
break; |
| 227 |
|
| 228 |
if (QUERY_FLAG (op, FLAG_IS_FLOOR) |
| 229 |
|| QUERY_FLAG (op, FLAG_OBJ_ORIGINAL) |
| 230 |
|| QUERY_FLAG (op, FLAG_OBJ_SAVE_ON_OVL) |
| 231 |
|| QUERY_FLAG (op, FLAG_UNIQUE) |
| 232 |
|| QUERY_FLAG (op, FLAG_OVERLAY_FLOOR) |
| 233 |
|| QUERY_FLAG (op, FLAG_UNPAID) |
| 234 |
|| op->is_alive ()) |
| 235 |
; // do not decay |
| 236 |
else if (op->is_weapon ()) |
| 237 |
{ |
| 238 |
op->stats.dam--; |
| 239 |
if (op->stats.dam < 0) |
| 240 |
destroy = 1; |
| 241 |
} |
| 242 |
else if (op->is_armor ()) |
| 243 |
{ |
| 244 |
op->stats.ac--; |
| 245 |
if (op->stats.ac < 0) |
| 246 |
destroy = 1; |
| 247 |
} |
| 248 |
else if (op->type == FOOD) |
| 249 |
{ |
| 250 |
op->stats.food -= rndm (5, 20); |
| 251 |
if (op->stats.food < 0) |
| 252 |
destroy = 1; |
| 253 |
} |
| 254 |
else |
| 255 |
{ |
| 256 |
int mat = op->materials; |
| 257 |
|
| 258 |
if (mat & M_PAPER |
| 259 |
|| mat & M_LEATHER |
| 260 |
|| mat & M_WOOD |
| 261 |
|| mat & M_ORGANIC |
| 262 |
|| mat & M_CLOTH |
| 263 |
|| mat & M_LIQUID |
| 264 |
|| (mat & M_IRON && rndm (1, 5) == 1) |
| 265 |
|| (mat & M_GLASS && rndm (1, 2) == 1) |
| 266 |
|| ((mat & M_STONE || mat & M_ADAMANT) && rndm (1, 10) == 1) |
| 267 |
|| ((mat & M_SOFT_METAL || mat & M_BONE) && rndm (1, 3) == 1) |
| 268 |
|| (mat & M_ICE && temp > 32)) |
| 269 |
destroy = 1; |
| 270 |
} |
| 271 |
|
| 272 |
/* adjust overall chance below */ |
| 273 |
if (destroy && rndm (0, 1)) |
| 274 |
op->destroy (); |
| 275 |
} |
| 276 |
} |
| 277 |
|
| 278 |
/* convert materialname to materialtype_t */ |
| 279 |
|
| 280 |
materialtype_t * |
| 281 |
name_to_material (const shstr &name) |
| 282 |
{ |
| 283 |
for (materialtype_t *mt = materialt; mt && mt->next; mt = mt->next) |
| 284 |
if (name == mt->name) |
| 285 |
return mt; |
| 286 |
|
| 287 |
return materialt; |
| 288 |
} |
| 289 |
|
| 290 |
/* when doing transmutation of objects, we have to recheck the resistances, |
| 291 |
* as some that did not apply previously, may apply now. |
| 292 |
*/ |
| 293 |
|
| 294 |
void |
| 295 |
transmute_materialname (object *op, const object *change) |
| 296 |
{ |
| 297 |
materialtype_t *mt; |
| 298 |
int j; |
| 299 |
|
| 300 |
if (op->materialname == NULL) |
| 301 |
return; |
| 302 |
|
| 303 |
if (change->materialname != NULL && strcmp (op->materialname, change->materialname)) |
| 304 |
return; |
| 305 |
|
| 306 |
if (!op->is_armor ()) |
| 307 |
return; |
| 308 |
|
| 309 |
mt = name_to_material (op->materialname); |
| 310 |
if (!mt) |
| 311 |
{ |
| 312 |
LOG (llevError, "archetype '%s>%s' uses nonexistent material '%s'\n", &op->arch->name, &op->name, &op->materialname); |
| 313 |
return; |
| 314 |
} |
| 315 |
|
| 316 |
for (j = 0; j < NROFATTACKS; j++) |
| 317 |
if (op->resist[j] == 0 && change->resist[j] != 0) |
| 318 |
{ |
| 319 |
op->resist[j] += mt->mod[j]; |
| 320 |
if (op->resist[j] > 100) |
| 321 |
op->resist[j] = 100; |
| 322 |
if (op->resist[j] < -100) |
| 323 |
op->resist[j] = -100; |
| 324 |
} |
| 325 |
} |
| 326 |
|
| 327 |
/* set the materialname and type for an item */ |
| 328 |
void |
| 329 |
set_materialname (object *op, int difficulty, materialtype_t *nmt) |
| 330 |
{ |
| 331 |
materialtype_t *mt, *lmt; |
| 332 |
|
| 333 |
#ifdef NEW_MATERIAL_CODE |
| 334 |
int j; |
| 335 |
#endif |
| 336 |
|
| 337 |
if (op->materialname != NULL) |
| 338 |
return; |
| 339 |
|
| 340 |
|
| 341 |
|
| 342 |
if (nmt == NULL) |
| 343 |
{ |
| 344 |
lmt = NULL; |
| 345 |
#ifndef NEW_MATERIAL_CODE |
| 346 |
for (mt = materialt; mt && mt->next; mt = mt->next) |
| 347 |
{ |
| 348 |
if (op->materials & mt->material) |
| 349 |
{ |
| 350 |
lmt = mt; |
| 351 |
break; |
| 352 |
} |
| 353 |
} |
| 354 |
|
| 355 |
#else |
| 356 |
for (mt = materialt; mt && mt->next; mt = mt->next) |
| 357 |
{ |
| 358 |
if (op->materials & mt->material && rndm (1, 100) <= mt->chance && |
| 359 |
difficulty >= mt->difficulty && (op->magic >= mt->magic || mt->magic == 0)) |
| 360 |
{ |
| 361 |
lmt = mt; |
| 362 |
if (!(op->is_weapon () || op->is_armor ())) |
| 363 |
break; |
| 364 |
} |
| 365 |
} |
| 366 |
#endif |
| 367 |
} |
| 368 |
else |
| 369 |
{ |
| 370 |
lmt = nmt; |
| 371 |
} |
| 372 |
|
| 373 |
if (lmt != NULL) |
| 374 |
{ |
| 375 |
#ifndef NEW_MATERIAL_CODE |
| 376 |
op->materialname = lmt->name; |
| 377 |
return; |
| 378 |
#else |
| 379 |
|
| 380 |
if (op->stats.dam && op->is_weapon ()) |
| 381 |
{ |
| 382 |
op->stats.dam += lmt->damage; |
| 383 |
if (op->stats.dam < 1) |
| 384 |
op->stats.dam = 1; |
| 385 |
} |
| 386 |
|
| 387 |
if (op->stats.sp && op->type == BOW) |
| 388 |
op->stats.sp += lmt->sp; |
| 389 |
if (op->stats.wc && op->is_weapon ()) |
| 390 |
op->stats.wc += lmt->wc; |
| 391 |
if (op->is_armor ()) |
| 392 |
{ |
| 393 |
if (op->stats.ac) |
| 394 |
op->stats.ac += lmt->ac; |
| 395 |
for (j = 0; j < NROFATTACKS; j++) |
| 396 |
if (op->resist[j] != 0) |
| 397 |
{ |
| 398 |
op->resist[j] += lmt->mod[j]; |
| 399 |
if (op->resist[j] > 100) |
| 400 |
op->resist[j] = 100; |
| 401 |
if (op->resist[j] < -100) |
| 402 |
op->resist[j] = -100; |
| 403 |
} |
| 404 |
} |
| 405 |
op->materialname = lmt->name; |
| 406 |
/* dont make it unstackable if it doesn't need to be */ |
| 407 |
if (op->is_weapon () || op->is_armor ()) |
| 408 |
{ |
| 409 |
op->weight = (op->weight * lmt->weight) / 100; |
| 410 |
op->value = (op->value * lmt->value) / 100; |
| 411 |
} |
| 412 |
#endif |
| 413 |
} |
| 414 |
} |
| 415 |
|
| 416 |
/* |
| 417 |
* Strip out the media tags from a String. |
| 418 |
* Warning the input string will contain the result string |
| 419 |
*/ |
| 420 |
void |
| 421 |
strip_media_tag (char *message) |
| 422 |
{ |
| 423 |
int in_tag = 0; |
| 424 |
char *dest; |
| 425 |
char *src; |
| 426 |
|
| 427 |
src = dest = message; |
| 428 |
while (*src != '\0') |
| 429 |
{ |
| 430 |
if (*src == '[') |
| 431 |
{ |
| 432 |
in_tag = 1; |
| 433 |
} |
| 434 |
else if (in_tag && (*src == ']')) |
| 435 |
in_tag = 0; |
| 436 |
else if (!in_tag) |
| 437 |
{ |
| 438 |
*dest = *src; |
| 439 |
dest++; |
| 440 |
} |
| 441 |
src++; |
| 442 |
} |
| 443 |
*dest = '\0'; |
| 444 |
} |
| 445 |
|
| 446 |
const char * |
| 447 |
strrstr (const char *haystack, const char *needle) |
| 448 |
{ |
| 449 |
const char *lastneedle; |
| 450 |
|
| 451 |
lastneedle = NULL; |
| 452 |
while ((haystack = strstr (haystack, needle)) != NULL) |
| 453 |
{ |
| 454 |
lastneedle = haystack; |
| 455 |
haystack++; |
| 456 |
} |
| 457 |
return lastneedle; |
| 458 |
|
| 459 |
} |
| 460 |
|
| 461 |
#define EOL_SIZE (sizeof("\n")-1) |
| 462 |
void |
| 463 |
strip_endline (char *buf) |
| 464 |
{ |
| 465 |
if (strlen (buf) < sizeof ("\n")) |
| 466 |
{ |
| 467 |
return; |
| 468 |
} |
| 469 |
if (!strcmp (buf + strlen (buf) - EOL_SIZE, "\n")) |
| 470 |
buf[strlen (buf) - EOL_SIZE] = '\0'; |
| 471 |
} |
| 472 |
|
| 473 |
/** |
| 474 |
* Replace in string src all occurrences of key by replacement. The resulting |
| 475 |
* string is put into result; at most resultsize characters (including the |
| 476 |
* terminating null character) will be written to result. |
| 477 |
*/ |
| 478 |
void |
| 479 |
replace (const char *src, const char *key, const char *replacement, char *result, size_t resultsize) |
| 480 |
{ |
| 481 |
size_t resultlen; |
| 482 |
size_t keylen; |
| 483 |
|
| 484 |
/* special case to prevent infinite loop if key==replacement=="" */ |
| 485 |
if (strcmp (key, replacement) == 0) |
| 486 |
{ |
| 487 |
snprintf (result, resultsize, "%s", src); |
| 488 |
return; |
| 489 |
} |
| 490 |
|
| 491 |
keylen = strlen (key); |
| 492 |
|
| 493 |
resultlen = 0; |
| 494 |
while (*src != '\0' && resultlen + 1 < resultsize) |
| 495 |
{ |
| 496 |
if (strncmp (src, key, keylen) == 0) |
| 497 |
{ |
| 498 |
snprintf (result + resultlen, resultsize - resultlen, "%s", replacement); |
| 499 |
resultlen += strlen (result + resultlen); |
| 500 |
src += keylen; |
| 501 |
} |
| 502 |
else |
| 503 |
{ |
| 504 |
result[resultlen++] = *src++; |
| 505 |
} |
| 506 |
} |
| 507 |
result[resultlen] = '\0'; |
| 508 |
} |
| 509 |
|
| 510 |
/** |
| 511 |
* Taking a string as an argument, mutate it into a string that looks like a list. |
| 512 |
* a 'list' for the purposes here, is a string of items, seperated by commas, except |
| 513 |
* for the last entry, which has an 'and' before it, and a full stop (period) after it. |
| 514 |
* This function will also strip all trailing non alphanumeric characters. |
| 515 |
* It does not insert an oxford comma. |
| 516 |
*/ |
| 517 |
|
| 518 |
void |
| 519 |
make_list_like (char *input) |
| 520 |
{ |
| 521 |
char *p, tmp[MAX_BUF]; |
| 522 |
int i; |
| 523 |
|
| 524 |
if (!input || strlen (input) > MAX_BUF - 5) |
| 525 |
return; |
| 526 |
/* bad stuff would happen if we continued here, the -5 is to make space for ' and ' */ |
| 527 |
|
| 528 |
strncpy (tmp, input, MAX_BUF - 5); |
| 529 |
/*trim all trailing commas, spaces etc. */ |
| 530 |
for (i = strlen (tmp); !isalnum (tmp[i]) && i >= 0; i--) |
| 531 |
tmp[i] = '\0'; |
| 532 |
|
| 533 |
strcat (tmp, "."); |
| 534 |
|
| 535 |
p = strrchr (tmp, ','); |
| 536 |
if (p) |
| 537 |
{ |
| 538 |
*p = '\0'; |
| 539 |
strcpy (input, tmp); |
| 540 |
p++; |
| 541 |
strcat (input, " and"); |
| 542 |
strcat (input, p); |
| 543 |
} |
| 544 |
else |
| 545 |
strcpy (input, tmp); |
| 546 |
|
| 547 |
return; |
| 548 |
} |
| 549 |
|
| 550 |
///////////////////////////////////////////////////////////////////////////// |
| 551 |
|
| 552 |
void |
| 553 |
fork_abort (const char *msg) |
| 554 |
{ |
| 555 |
if (!fork ()) |
| 556 |
{ |
| 557 |
signal (SIGABRT, SIG_DFL); |
| 558 |
abort (); |
| 559 |
} |
| 560 |
|
| 561 |
LOG (llevError, "fork abort: %s\n", msg); |
| 562 |
} |
| 563 |
|
| 564 |
void *salloc_ (int n) throw (std::bad_alloc) |
| 565 |
{ |
| 566 |
#ifdef PREFER_MALLOC |
| 567 |
void *ptr = malloc (n); |
| 568 |
#else |
| 569 |
void *ptr = g_slice_alloc (n); |
| 570 |
#endif |
| 571 |
|
| 572 |
if (!ptr) |
| 573 |
throw std::bad_alloc (); |
| 574 |
|
| 575 |
return ptr; |
| 576 |
} |
| 577 |
|
| 578 |
void *salloc_ (int n, void *src) throw (std::bad_alloc) |
| 579 |
{ |
| 580 |
void *ptr = salloc_ (n); |
| 581 |
|
| 582 |
if (src) |
| 583 |
memcpy (ptr, src, n); |
| 584 |
else |
| 585 |
memset (ptr, 0, n); |
| 586 |
|
| 587 |
return ptr; |
| 588 |
} |
| 589 |
|
| 590 |
void assign (char *dst, const char *src, int maxlen) |
| 591 |
{ |
| 592 |
if (!src) |
| 593 |
src = ""; |
| 594 |
|
| 595 |
int len = strlen (src); |
| 596 |
|
| 597 |
if (len >= maxlen - 1) |
| 598 |
{ |
| 599 |
if (maxlen <= 4) |
| 600 |
{ |
| 601 |
memset (dst, '.', maxlen - 1); |
| 602 |
dst [maxlen - 1] = 0; |
| 603 |
} |
| 604 |
else |
| 605 |
{ |
| 606 |
memcpy (dst, src, maxlen - 4); |
| 607 |
memcpy (dst + maxlen - 4, "...", 4); |
| 608 |
} |
| 609 |
} |
| 610 |
else |
| 611 |
memcpy (dst, src, len + 1); |
| 612 |
} |
| 613 |
|
| 614 |
tstamp now () |
| 615 |
{ |
| 616 |
struct timeval tv; |
| 617 |
|
| 618 |
gettimeofday (&tv, 0); |
| 619 |
return tstamp (tv.tv_sec) + tstamp (tv.tv_usec) * tstamp (1e-6); |
| 620 |
} |
| 621 |
|
| 622 |
int |
| 623 |
similar_direction (int a, int b) |
| 624 |
{ |
| 625 |
if (!a || !b) |
| 626 |
return 0; |
| 627 |
|
| 628 |
int diff = (b - a) & 7; |
| 629 |
return diff <= 1 || diff >= 7; |
| 630 |
} |
| 631 |
|
