| 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 |
| 8 |
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 |
|
| 12 |
This program is distributed in the hope that it will be useful, |
| 13 |
but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 |
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 |
GNU General Public License for more details. |
| 16 |
|
| 17 |
You should have received a copy of the GNU General Public License |
| 18 |
along with this program; if not, write to the Free Software |
| 19 |
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 20 |
|
| 21 |
The authors can be reached via e-mail at <crossfire@schmorp.de> |
| 22 |
*/ |
| 23 |
|
| 24 |
/* |
| 25 |
* General convenience functions for crossfire. |
| 26 |
*/ |
| 27 |
|
| 28 |
#include <global.h> |
| 29 |
#include <funcpoint.h> |
| 30 |
#include <material.h> |
| 31 |
|
| 32 |
#include <glib.h> |
| 33 |
|
| 34 |
/* |
| 35 |
* The random functions here take luck into account when rolling random |
| 36 |
* dice or numbers. This function has less of an impact the larger the |
| 37 |
* difference becomes in the random numbers. IE, the effect is lessened |
| 38 |
* on a 1-1000 roll, vs a 1-6 roll. This can be used by crafty programmers, |
| 39 |
* to specifically disable luck in certain rolls, simply by making the |
| 40 |
* numbers larger (ie, 1d1000 > 500 vs 1d6 > 3) |
| 41 |
*/ |
| 42 |
|
| 43 |
/* |
| 44 |
* Roll a random number between min and max. Uses op to determine luck, |
| 45 |
* and if goodbad is non-zero, luck increases the roll, if zero, it decreases. |
| 46 |
* Generally, op should be the player/caster/hitter requesting the roll, |
| 47 |
* not the recipient (ie, the poor slob getting hit). [garbled 20010916] |
| 48 |
*/ |
| 49 |
|
| 50 |
int |
| 51 |
random_roll (int min, int max, const object *op, int goodbad) |
| 52 |
{ |
| 53 |
int omin, diff, luck, base, ran; |
| 54 |
|
| 55 |
omin = min; |
| 56 |
diff = max - min + 1; |
| 57 |
((diff > 2) ? (base = 20) : (base = 50)); /* d2 and d3 are corner cases */ |
| 58 |
|
| 59 |
if (max < 1 || diff < 1) |
| 60 |
{ |
| 61 |
LOG (llevError, "Calling random_roll with min=%d max=%d\n", min, max); |
| 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 |
|
| 90 |
sint64 |
| 91 |
random_roll64 (sint64 min, sint64 max, const object *op, int goodbad) |
| 92 |
{ |
| 93 |
sint64 omin, diff, luck, ran; |
| 94 |
int base; |
| 95 |
|
| 96 |
omin = min; |
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diff = max - min + 1; |
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((diff > 2) ? (base = 20) : (base = 50)); /* d2 and d3 are corner cases */ |
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|
| 100 |
if (max < 1 || diff < 1) |
| 101 |
{ |
| 102 |
#ifndef WIN32 |
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LOG (llevError, "Calling random_roll with min=%lld max=%lld\n", min, max); |
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#else |
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LOG (llevError, "Calling random_roll with min=%I64d max=%I64d\n", min, max); |
| 106 |
#endif |
| 107 |
return (min); /* avoids a float exception */ |
| 108 |
} |
| 109 |
|
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/* 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 |
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* 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 |
|
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luck = op->stats.luck; |
| 121 |
if (RANDOM () % base < MIN (10, abs (luck))) |
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{ |
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/* we have a winner */ |
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((luck > 0) ? (luck = 1) : (luck = -1)); |
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diff -= luck; |
| 126 |
if (diff < 1) |
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return (omin); /*check again */ |
| 128 |
((goodbad) ? (min += luck) : (diff)); |
| 129 |
|
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return (MAX (omin, MIN (max, (ran % diff) + min))); |
| 131 |
} |
| 132 |
return ((ran % diff) + min); |
| 133 |
} |
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|
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/* |
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* 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 |
|
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int |
| 144 |
die_roll (int num, int size, const object *op, int goodbad) |
| 145 |
{ |
| 146 |
int min, diff, luck, total, i, gotlucky, base, ran; |
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|
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diff = size; |
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min = 1; |
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luck = total = gotlucky = 0; |
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((diff > 2) ? (base = 20) : (base = 50)); /* d2 and d3 are corner cases */ |
| 152 |
if (size < 2 || diff < 1) |
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{ |
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LOG (llevError, "Calling die_roll with num=%d size=%d\n", num, size); |
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return (num); /* avoids a float exception */ |
| 156 |
} |
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|
| 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) |
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{ |
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/* we have a winner */ |
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gotlucky++; |
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((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 |
} |
| 175 |
else |
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{ |
| 177 |
total += RANDOM () % size + 1; |
| 178 |
} |
| 179 |
} |
| 180 |
return (total); |
| 181 |
} |
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|
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/* |
| 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 |
*/ |
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|
| 190 |
int |
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rndm (int min, int max) |
| 192 |
{ |
| 193 |
int diff; |
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|
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diff = max - min + 1; |
| 196 |
if (max < 1 || diff < 1) |
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return (min); |
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|
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return (RANDOM () % diff + min); |
| 200 |
} |
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|
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/* decay and destroy persihable items in a map */ |
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|
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void |
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decay_objects (maptile *m) |
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{ |
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int x, y, destroy; |
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object *op, *otmp; |
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|
| 210 |
if (m->unique) |
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return; |
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|
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for (x = 0; x < MAP_WIDTH (m); x++) |
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for (y = 0; y < MAP_HEIGHT (m); y++) |
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for (op = get_map_ob (m, x, y); op; op = otmp) |
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{ |
| 217 |
destroy = 0; |
| 218 |
otmp = op->above; |
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if (QUERY_FLAG (op, FLAG_IS_FLOOR) && QUERY_FLAG (op, FLAG_UNIQUE)) |
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break; |
| 221 |
if (QUERY_FLAG (op, FLAG_IS_FLOOR) || |
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QUERY_FLAG (op, FLAG_OBJ_ORIGINAL) || |
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QUERY_FLAG (op, FLAG_OBJ_SAVE_ON_OVL) || |
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QUERY_FLAG (op, FLAG_UNIQUE) || QUERY_FLAG (op, FLAG_OVERLAY_FLOOR) || QUERY_FLAG (op, FLAG_UNPAID) || IS_LIVE (op)) |
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continue; |
| 226 |
/* otherwise, we decay and destroy */ |
| 227 |
if (IS_WEAPON (op)) |
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{ |
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op->stats.dam--; |
| 230 |
if (op->stats.dam < 0) |
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destroy = 1; |
| 232 |
} |
| 233 |
else if (IS_ARMOR (op)) |
| 234 |
{ |
| 235 |
op->stats.ac--; |
| 236 |
if (op->stats.ac < 0) |
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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) |
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destroy = 1; |
| 250 |
if (op->material & M_IRON && rndm (1, 5) == 1) |
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destroy = 1; |
| 252 |
if (op->material & M_GLASS && rndm (1, 2) == 1) |
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destroy = 1; |
| 254 |
if ((op->material & M_STONE || op->material & M_ADAMANT) && rndm (1, 10) == 1) |
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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 |
|
| 272 |
materialtype_t * |
| 273 |
name_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 |
|
| 293 |
void |
| 294 |
transmute_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 */ |
| 327 |
void |
| 328 |
set_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 |
} |
| 367 |
else |
| 368 |
{ |
| 369 |
lmt = nmt; |
| 370 |
} |
| 371 |
|
| 372 |
if (lmt != NULL) |
| 373 |
{ |
| 374 |
#ifndef NEW_MATERIAL_CODE |
| 375 |
op->materialname = lmt->name; |
| 376 |
return; |
| 377 |
#else |
| 378 |
|
| 379 |
if (op->stats.dam && IS_WEAPON (op)) |
| 380 |
{ |
| 381 |
op->stats.dam += lmt->damage; |
| 382 |
if (op->stats.dam < 1) |
| 383 |
op->stats.dam = 1; |
| 384 |
} |
| 385 |
if (op->stats.sp && op->type == BOW) |
| 386 |
op->stats.sp += lmt->sp; |
| 387 |
if (op->stats.wc && IS_WEAPON (op)) |
| 388 |
op->stats.wc += lmt->wc; |
| 389 |
if (IS_ARMOR (op)) |
| 390 |
{ |
| 391 |
if (op->stats.ac) |
| 392 |
op->stats.ac += lmt->ac; |
| 393 |
for (j = 0; j < NROFATTACKS; j++) |
| 394 |
if (op->resist[j] != 0) |
| 395 |
{ |
| 396 |
op->resist[j] += lmt->mod[j]; |
| 397 |
if (op->resist[j] > 100) |
| 398 |
op->resist[j] = 100; |
| 399 |
if (op->resist[j] < -100) |
| 400 |
op->resist[j] = -100; |
| 401 |
} |
| 402 |
} |
| 403 |
op->materialname = add_string (lmt->name); |
| 404 |
/* dont make it unstackable if it doesn't need to be */ |
| 405 |
if (IS_WEAPON (op) || IS_ARMOR (op)) |
| 406 |
{ |
| 407 |
op->weight = (op->weight * lmt->weight) / 100; |
| 408 |
op->value = (op->value * lmt->value) / 100; |
| 409 |
} |
| 410 |
#endif |
| 411 |
} |
| 412 |
} |
| 413 |
|
| 414 |
/* |
| 415 |
* Strip out the media tags from a String. |
| 416 |
* Warning the input string will contain the result string |
| 417 |
*/ |
| 418 |
void |
| 419 |
strip_media_tag (char *message) |
| 420 |
{ |
| 421 |
int in_tag = 0; |
| 422 |
char *dest; |
| 423 |
char *src; |
| 424 |
|
| 425 |
src = dest = message; |
| 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 |
|
| 444 |
const char * |
| 445 |
strrstr (const char *haystack, const char *needle) |
| 446 |
{ |
| 447 |
const char *lastneedle; |
| 448 |
|
| 449 |
lastneedle = NULL; |
| 450 |
while ((haystack = strstr (haystack, needle)) != NULL) |
| 451 |
{ |
| 452 |
lastneedle = haystack; |
| 453 |
haystack++; |
| 454 |
} |
| 455 |
return lastneedle; |
| 456 |
|
| 457 |
} |
| 458 |
|
| 459 |
#define EOL_SIZE (sizeof("\n")-1) |
| 460 |
void |
| 461 |
strip_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 |
*/ |
| 476 |
void |
| 477 |
replace (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 |
|
| 516 |
void |
| 517 |
make_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 |
|
| 550 |
void *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 |
|
| 560 |
void 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 |
|
