1 |
/* |
2 |
CrossFire, A Multiplayer game for X-windows |
3 |
|
4 |
Copyright (C) 2002 Mark Wedel & Crossfire Development Team |
5 |
Copyright (C) 1992 Frank Tore Johansen |
6 |
|
7 |
This program is free software; you can redistribute it and/or modify |
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it under the terms of the GNU General Public License as published by |
9 |
the Free Software Foundation; either version 2 of the License, or |
10 |
(at your option) any later version. |
11 |
|
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This program is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
14 |
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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GNU General Public License for more details. |
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|
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You should have received a copy of the GNU General Public License |
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along with this program; if not, write to the Free Software |
19 |
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
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|
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The authors can be reached via e-mail at <crossfire@schmorp.de> |
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*/ |
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|
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/* |
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* General convenience functions for crossfire. |
26 |
*/ |
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|
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#include <global.h> |
29 |
#include <funcpoint.h> |
30 |
#include <material.h> |
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|
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#include <sys/time.h> |
33 |
#include <time.h> |
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#include <glib.h> |
35 |
|
36 |
/* |
37 |
* The random functions here take luck into account when rolling random |
38 |
* dice or numbers. This function has less of an impact the larger the |
39 |
* difference becomes in the random numbers. IE, the effect is lessened |
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* on a 1-1000 roll, vs a 1-6 roll. This can be used by crafty programmers, |
41 |
* to specifically disable luck in certain rolls, simply by making the |
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* numbers larger (ie, 1d1000 > 500 vs 1d6 > 3) |
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*/ |
44 |
|
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/* |
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* 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 |
*/ |
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|
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int |
53 |
random_roll (int min, int max, const object *op, int goodbad) |
54 |
{ |
55 |
int omin, diff, luck, base, ran; |
56 |
|
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omin = min; |
58 |
diff = max - min + 1; |
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((diff > 2) ? (base = 20) : (base = 50)); /* d2 and d3 are corner cases */ |
60 |
|
61 |
if (max < 1 || diff < 1) |
62 |
{ |
63 |
LOG (llevError, "Calling random_roll with min=%d max=%d\n", min, max); |
64 |
return (min); /* avoids a float exception */ |
65 |
} |
66 |
|
67 |
ran = RANDOM (); |
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 |
} |
86 |
|
87 |
/* |
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* This is a 64 bit version of random_roll above. This is needed |
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* for exp loss calculations for players changing religions. |
90 |
*/ |
91 |
|
92 |
sint64 |
93 |
random_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; |
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((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 |
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* 32 bit, so we don't get skewed results |
112 |
*/ |
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ran = (RANDOM () & 0xffffffff) | ((sint64) RANDOM () << 32); |
114 |
|
115 |
if (op->type != PLAYER) |
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return ((ran % diff) + min); |
117 |
|
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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 |
/* |
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* 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. |
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* 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 |
|
141 |
int |
142 |
die_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 |
|
188 |
int |
189 |
rndm (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 persihable items in a map */ |
201 |
void |
202 |
maptile::decay_objects () |
203 |
{ |
204 |
int x, y, destroy; |
205 |
object *op, *otmp; |
206 |
|
207 |
for (x = 0; x < width; x++) |
208 |
for (y = 0; y < height; y++) |
209 |
for (op = at (x, y).bot; op; op = otmp) |
210 |
{ |
211 |
destroy = 0; |
212 |
otmp = op->above; |
213 |
|
214 |
if (QUERY_FLAG (op, FLAG_IS_FLOOR) && QUERY_FLAG (op, FLAG_UNIQUE)) |
215 |
break; |
216 |
|
217 |
if (QUERY_FLAG (op, FLAG_IS_FLOOR) |
218 |
|| QUERY_FLAG (op, FLAG_OBJ_ORIGINAL) |
219 |
|| QUERY_FLAG (op, FLAG_OBJ_SAVE_ON_OVL) |
220 |
|| QUERY_FLAG (op, FLAG_UNIQUE) |
221 |
|| QUERY_FLAG (op, FLAG_OVERLAY_FLOOR) |
222 |
|| QUERY_FLAG (op, FLAG_UNPAID) |
223 |
|| op->is_alive ()) |
224 |
continue; |
225 |
|
226 |
/* otherwise, we decay and destroy */ |
227 |
if (op->is_weapon ()) |
228 |
{ |
229 |
op->stats.dam--; |
230 |
if (op->stats.dam < 0) |
231 |
destroy = 1; |
232 |
} |
233 |
else if (op->is_armor ()) |
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 |
|
251 |
if (op->material & M_IRON && rndm (1, 5) == 1) |
252 |
destroy = 1; |
253 |
|
254 |
if (op->material & M_GLASS && rndm (1, 2) == 1) |
255 |
destroy = 1; |
256 |
|
257 |
if ((op->material & M_STONE || op->material & M_ADAMANT) && rndm (1, 10) == 1) |
258 |
destroy = 1; |
259 |
|
260 |
if ((op->material & M_SOFT_METAL || op->material & M_BONE) && rndm (1, 3) == 1) |
261 |
destroy = 1; |
262 |
|
263 |
if (op->material & M_ICE && temp > 32) |
264 |
destroy = 1; |
265 |
} |
266 |
|
267 |
/* adjust overall chance below */ |
268 |
if (destroy && rndm (0, 1)) |
269 |
op->destroy (); |
270 |
} |
271 |
} |
272 |
|
273 |
/* convert materialname to materialtype_t */ |
274 |
|
275 |
materialtype_t * |
276 |
name_to_material (const char *name) |
277 |
{ |
278 |
materialtype_t *mt, *nmt; |
279 |
|
280 |
mt = NULL; |
281 |
for (nmt = materialt; nmt != NULL && nmt->next != NULL; nmt = nmt->next) |
282 |
{ |
283 |
if (strcmp (name, nmt->name) == 0) |
284 |
{ |
285 |
mt = nmt; |
286 |
break; |
287 |
} |
288 |
} |
289 |
return mt; |
290 |
} |
291 |
|
292 |
/* when doing transmutation of objects, we have to recheck the resistances, |
293 |
* as some that did not apply previously, may apply now. |
294 |
*/ |
295 |
|
296 |
void |
297 |
transmute_materialname (object *op, const object *change) |
298 |
{ |
299 |
materialtype_t *mt; |
300 |
int j; |
301 |
|
302 |
if (op->materialname == NULL) |
303 |
return; |
304 |
|
305 |
if (change->materialname != NULL && strcmp (op->materialname, change->materialname)) |
306 |
return; |
307 |
|
308 |
if (!op->is_armor ()) |
309 |
return; |
310 |
|
311 |
mt = name_to_material (op->materialname); |
312 |
if (!mt) |
313 |
{ |
314 |
LOG (llevError, "archetype '%s>%s' uses nonexistent material '%s'\n", &op->arch->name, &op->name, &op->materialname); |
315 |
return; |
316 |
} |
317 |
|
318 |
for (j = 0; j < NROFATTACKS; j++) |
319 |
if (op->resist[j] == 0 && change->resist[j] != 0) |
320 |
{ |
321 |
op->resist[j] += mt->mod[j]; |
322 |
if (op->resist[j] > 100) |
323 |
op->resist[j] = 100; |
324 |
if (op->resist[j] < -100) |
325 |
op->resist[j] = -100; |
326 |
} |
327 |
} |
328 |
|
329 |
/* set the materialname and type for an item */ |
330 |
void |
331 |
set_materialname (object *op, int difficulty, materialtype_t *nmt) |
332 |
{ |
333 |
materialtype_t *mt, *lmt; |
334 |
|
335 |
#ifdef NEW_MATERIAL_CODE |
336 |
int j; |
337 |
#endif |
338 |
|
339 |
if (op->materialname != NULL) |
340 |
return; |
341 |
|
342 |
|
343 |
|
344 |
if (nmt == NULL) |
345 |
{ |
346 |
lmt = NULL; |
347 |
#ifndef NEW_MATERIAL_CODE |
348 |
for (mt = materialt; mt != NULL && mt->next != NULL; mt = mt->next) |
349 |
{ |
350 |
if (op->material & mt->material) |
351 |
{ |
352 |
lmt = mt; |
353 |
break; |
354 |
} |
355 |
} |
356 |
|
357 |
#else |
358 |
for (mt = materialt; mt != NULL && mt->next != NULL; mt = mt->next) |
359 |
{ |
360 |
if (op->material & mt->material && rndm (1, 100) <= mt->chance && |
361 |
difficulty >= mt->difficulty && (op->magic >= mt->magic || mt->magic == 0)) |
362 |
{ |
363 |
lmt = mt; |
364 |
if (!(op->is_weapon () || op->is_armor ())) |
365 |
break; |
366 |
} |
367 |
} |
368 |
#endif |
369 |
} |
370 |
else |
371 |
{ |
372 |
lmt = nmt; |
373 |
} |
374 |
|
375 |
if (lmt != NULL) |
376 |
{ |
377 |
#ifndef NEW_MATERIAL_CODE |
378 |
op->materialname = lmt->name; |
379 |
return; |
380 |
#else |
381 |
|
382 |
if (op->stats.dam && op->is_weapon ()) |
383 |
{ |
384 |
op->stats.dam += lmt->damage; |
385 |
if (op->stats.dam < 1) |
386 |
op->stats.dam = 1; |
387 |
} |
388 |
if (op->stats.sp && op->type == BOW) |
389 |
op->stats.sp += lmt->sp; |
390 |
if (op->stats.wc && op->is_weapon ()) |
391 |
op->stats.wc += lmt->wc; |
392 |
if (op->is_armor ()) |
393 |
{ |
394 |
if (op->stats.ac) |
395 |
op->stats.ac += lmt->ac; |
396 |
for (j = 0; j < NROFATTACKS; j++) |
397 |
if (op->resist[j] != 0) |
398 |
{ |
399 |
op->resist[j] += lmt->mod[j]; |
400 |
if (op->resist[j] > 100) |
401 |
op->resist[j] = 100; |
402 |
if (op->resist[j] < -100) |
403 |
op->resist[j] = -100; |
404 |
} |
405 |
} |
406 |
op->materialname = add_string (lmt->name); |
407 |
/* dont make it unstackable if it doesn't need to be */ |
408 |
if (op->is_weapon () || op->is_armor ()) |
409 |
{ |
410 |
op->weight = (op->weight * lmt->weight) / 100; |
411 |
op->value = (op->value * lmt->value) / 100; |
412 |
} |
413 |
#endif |
414 |
} |
415 |
} |
416 |
|
417 |
/* |
418 |
* Strip out the media tags from a String. |
419 |
* Warning the input string will contain the result string |
420 |
*/ |
421 |
void |
422 |
strip_media_tag (char *message) |
423 |
{ |
424 |
int in_tag = 0; |
425 |
char *dest; |
426 |
char *src; |
427 |
|
428 |
src = dest = message; |
429 |
while (*src != '\0') |
430 |
{ |
431 |
if (*src == '[') |
432 |
{ |
433 |
in_tag = 1; |
434 |
} |
435 |
else if (in_tag && (*src == ']')) |
436 |
in_tag = 0; |
437 |
else if (!in_tag) |
438 |
{ |
439 |
*dest = *src; |
440 |
dest++; |
441 |
} |
442 |
src++; |
443 |
} |
444 |
*dest = '\0'; |
445 |
} |
446 |
|
447 |
const char * |
448 |
strrstr (const char *haystack, const char *needle) |
449 |
{ |
450 |
const char *lastneedle; |
451 |
|
452 |
lastneedle = NULL; |
453 |
while ((haystack = strstr (haystack, needle)) != NULL) |
454 |
{ |
455 |
lastneedle = haystack; |
456 |
haystack++; |
457 |
} |
458 |
return lastneedle; |
459 |
|
460 |
} |
461 |
|
462 |
#define EOL_SIZE (sizeof("\n")-1) |
463 |
void |
464 |
strip_endline (char *buf) |
465 |
{ |
466 |
if (strlen (buf) < sizeof ("\n")) |
467 |
{ |
468 |
return; |
469 |
} |
470 |
if (!strcmp (buf + strlen (buf) - EOL_SIZE, "\n")) |
471 |
buf[strlen (buf) - EOL_SIZE] = '\0'; |
472 |
} |
473 |
|
474 |
/** |
475 |
* Replace in string src all occurrences of key by replacement. The resulting |
476 |
* string is put into result; at most resultsize characters (including the |
477 |
* terminating null character) will be written to result. |
478 |
*/ |
479 |
void |
480 |
replace (const char *src, const char *key, const char *replacement, char *result, size_t resultsize) |
481 |
{ |
482 |
size_t resultlen; |
483 |
size_t keylen; |
484 |
|
485 |
/* special case to prevent infinite loop if key==replacement=="" */ |
486 |
if (strcmp (key, replacement) == 0) |
487 |
{ |
488 |
snprintf (result, resultsize, "%s", src); |
489 |
return; |
490 |
} |
491 |
|
492 |
keylen = strlen (key); |
493 |
|
494 |
resultlen = 0; |
495 |
while (*src != '\0' && resultlen + 1 < resultsize) |
496 |
{ |
497 |
if (strncmp (src, key, keylen) == 0) |
498 |
{ |
499 |
snprintf (result + resultlen, resultsize - resultlen, "%s", replacement); |
500 |
resultlen += strlen (result + resultlen); |
501 |
src += keylen; |
502 |
} |
503 |
else |
504 |
{ |
505 |
result[resultlen++] = *src++; |
506 |
} |
507 |
} |
508 |
result[resultlen] = '\0'; |
509 |
} |
510 |
|
511 |
/** |
512 |
* Taking a string as an argument, mutate it into a string that looks like a list. |
513 |
* a 'list' for the purposes here, is a string of items, seperated by commas, except |
514 |
* for the last entry, which has an 'and' before it, and a full stop (period) after it. |
515 |
* This function will also strip all trailing non alphanumeric characters. |
516 |
* It does not insert an oxford comma. |
517 |
*/ |
518 |
|
519 |
void |
520 |
make_list_like (char *input) |
521 |
{ |
522 |
char *p, tmp[MAX_BUF]; |
523 |
int i; |
524 |
|
525 |
if (!input || strlen (input) > MAX_BUF - 5) |
526 |
return; |
527 |
/* bad stuff would happen if we continued here, the -5 is to make space for ' and ' */ |
528 |
|
529 |
strncpy (tmp, input, MAX_BUF - 5); |
530 |
/*trim all trailing commas, spaces etc. */ |
531 |
for (i = strlen (tmp); !isalnum (tmp[i]) && i >= 0; i--) |
532 |
tmp[i] = '\0'; |
533 |
|
534 |
strcat (tmp, "."); |
535 |
|
536 |
p = strrchr (tmp, ','); |
537 |
if (p) |
538 |
{ |
539 |
*p = '\0'; |
540 |
strcpy (input, tmp); |
541 |
p++; |
542 |
strcat (input, " and"); |
543 |
strcat (input, p); |
544 |
} |
545 |
else |
546 |
strcpy (input, tmp); |
547 |
|
548 |
return; |
549 |
} |
550 |
|
551 |
///////////////////////////////////////////////////////////////////////////// |
552 |
|
553 |
void *salloc_ (int n) throw (std::bad_alloc) |
554 |
{ |
555 |
void *ptr = g_slice_alloc (n); |
556 |
|
557 |
if (!ptr) |
558 |
throw std::bad_alloc (); |
559 |
|
560 |
return ptr; |
561 |
} |
562 |
|
563 |
void *salloc_ (int n, void *src) throw (std::bad_alloc) |
564 |
{ |
565 |
void *ptr = salloc_ (n); |
566 |
|
567 |
if (src) |
568 |
memcpy (ptr, src, n); |
569 |
else |
570 |
memset (ptr, 0, n); |
571 |
|
572 |
return ptr; |
573 |
} |
574 |
|
575 |
void assign (char *dst, const char *src, int maxlen) |
576 |
{ |
577 |
if (!src) |
578 |
src = ""; |
579 |
|
580 |
int len = strlen (src); |
581 |
|
582 |
if (len >= maxlen - 1) |
583 |
{ |
584 |
if (maxlen <= 4) |
585 |
{ |
586 |
memset (dst, '.', maxlen - 1); |
587 |
dst [maxlen - 1] = 0; |
588 |
} |
589 |
else |
590 |
{ |
591 |
memcpy (dst, src, maxlen - 4); |
592 |
memcpy (dst + maxlen - 4, "...", 4); |
593 |
} |
594 |
} |
595 |
else |
596 |
memcpy (dst, src, len + 1); |
597 |
} |
598 |
|
599 |
tstamp now () |
600 |
{ |
601 |
struct timeval tv; |
602 |
|
603 |
gettimeofday (&tv, 0); |
604 |
return tstamp (tv.tv_sec) + tstamp (tv.tv_usec) * tstamp (1e-6); |
605 |
} |
606 |
|
607 |
int |
608 |
similar_direction (int a, int b) |
609 |
{ |
610 |
if (!a || !b) |
611 |
return 0; |
612 |
|
613 |
int diff = (b - a) & 7; |
614 |
return diff <= 1 || diff >= 7; |
615 |
} |
616 |
|