| 1 |
/* |
| 2 |
* static char *rcsid_utils_c = |
| 3 |
* "$Id: utils.c,v 1.22 2006/01/08 22:47:56 qal21 Exp $"; |
| 4 |
*/ |
| 5 |
|
| 6 |
/* |
| 7 |
CrossFire, A Multiplayer game for X-windows |
| 8 |
|
| 9 |
Copyright (C) 2002 Mark Wedel & Crossfire Development Team |
| 10 |
Copyright (C) 1992 Frank Tore Johansen |
| 11 |
|
| 12 |
This program is free software; you can redistribute it and/or modify |
| 13 |
it under the terms of the GNU General Public License as published by |
| 14 |
the Free Software Foundation; either version 2 of the License, or |
| 15 |
(at your option) any later version. |
| 16 |
|
| 17 |
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 |
| 19 |
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 20 |
GNU General Public License for more details. |
| 21 |
|
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You should have received a copy of the GNU General Public License |
| 23 |
along with this program; if not, write to the Free Software |
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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-devel@real-time.com |
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*/ |
| 28 |
|
| 29 |
/* |
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* General convenience functions for crossfire. |
| 31 |
*/ |
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|
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#include <global.h> |
| 34 |
#include <funcpoint.h> |
| 35 |
|
| 36 |
/* |
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* 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 |
| 40 |
* 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 |
| 42 |
* numbers larger (ie, 1d1000 > 500 vs 1d6 > 3) |
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*/ |
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|
| 45 |
/* |
| 46 |
* 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 |
*/ |
| 51 |
|
| 52 |
int random_roll(int min, int max, object *op, int goodbad) { |
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int omin, diff, luck, base, ran; |
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|
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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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|
| 59 |
if (max < 1 || diff < 1) { |
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LOG(llevError, "Calling random_roll with min=%d max=%d\n", min, max); |
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return(min); /* avoids a float exception */ |
| 62 |
} |
| 63 |
|
| 64 |
ran = RANDOM(); |
| 65 |
|
| 66 |
if (op->type != PLAYER) |
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return((ran%diff)+min); |
| 68 |
|
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luck = op->stats.luck; |
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if (RANDOM()%base < MIN(10, abs(luck))) { |
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/* we have a winner */ |
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((luck > 0) ? (luck = 1) : (luck = -1)); |
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diff -= luck; |
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if (diff < 1) |
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return(omin); /*check again*/ |
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((goodbad) ? (min += luck) : (diff)); |
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|
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return(MAX(omin, MIN(max, (ran%diff)+min))); |
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} |
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return((ran%diff)+min); |
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} |
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|
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/* |
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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. |
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*/ |
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|
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sint64 random_roll64(sint64 min, sint64 max, object *op, int goodbad) { |
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sint64 omin, diff, luck, ran; |
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int base; |
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|
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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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|
| 96 |
if (max < 1 || diff < 1) { |
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#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); |
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#endif |
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return(min); /* avoids a float exception */ |
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} |
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|
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/* Don't know of a portable call to get 64 bit random values. |
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* So make a call to get two 32 bit random numbers, and just to |
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* a little byteshifting. Do make sure the first one is only |
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* 32 bit, so we don't get skewed results |
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*/ |
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ran = (RANDOM() & 0xffffffff) | ((sint64)RANDOM() << 32); |
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|
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if (op->type != PLAYER) |
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return((ran%diff)+min); |
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|
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luck = op->stats.luck; |
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if (RANDOM()%base < MIN(10, abs(luck))) { |
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/* we have a winner */ |
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((luck > 0) ? (luck = 1) : (luck = -1)); |
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diff -= luck; |
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if (diff < 1) |
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return(omin); /*check again*/ |
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((goodbad) ? (min += luck) : (diff)); |
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|
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return(MAX(omin, MIN(max, (ran%diff)+min))); |
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} |
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return((ran%diff)+min); |
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} |
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|
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/* |
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* Roll a number of dice (2d3, 4d6). Uses op to determine luck, |
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* 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, |
| 133 |
* not the recipient (ie, the poor slob getting hit). |
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* The args are num D size (ie 4d6) [garbled 20010916] |
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*/ |
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|
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int die_roll(int num, int size, object *op, int goodbad) { |
| 138 |
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 */ |
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if (size < 2 || diff < 1) { |
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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 */ |
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} |
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|
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if (op->type == PLAYER) |
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luck = op->stats.luck; |
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|
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for (i = 0; i < num; i++) { |
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if (RANDOM()%base < MIN(10, abs(luck)) && !gotlucky) { |
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/* we have a winner */ |
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gotlucky++; |
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((luck > 0) ? (luck = 1) : (luck = -1)); |
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diff -= luck; |
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if (diff < 1) |
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return(num); /*check again*/ |
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((goodbad) ? (min += luck) : (diff)); |
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ran = RANDOM(); |
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total += MAX(1, MIN(size, (ran%diff)+min)); |
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} else { |
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total += RANDOM()%size+1; |
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} |
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} |
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return(total); |
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} |
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|
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/* |
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* Another convenience function. Returns a number between min and max. |
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* It is suggested one use these functions rather than RANDOM()%, as it |
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* would appear that a number of off-by-one-errors exist due to improper |
| 174 |
* use of %. This should also prevent SIGFPE. |
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*/ |
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|
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int rndm(int min, int max) |
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{ |
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int diff; |
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|
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diff = max - min + 1; |
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if (max < 1 || diff < 1) |
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return(min); |
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|
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return(RANDOM()%diff+min); |
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} |
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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 decay_objects(mapstruct *m) |
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{ |
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int x, y, destroy; |
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object *op, *otmp; |
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|
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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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destroy = 0; |
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otmp = op->above; |
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if (QUERY_FLAG(op,FLAG_IS_FLOOR) && QUERY_FLAG(op, FLAG_UNIQUE)) |
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break; |
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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) || |
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QUERY_FLAG(op, FLAG_OVERLAY_FLOOR) || |
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QUERY_FLAG(op, FLAG_UNPAID) || IS_LIVE(op)) |
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continue; |
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/* otherwise, we decay and destroy */ |
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if (IS_WEAPON(op)) { |
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op->stats.dam--; |
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if (op->stats.dam < 0) |
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destroy = 1; |
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} else if (IS_ARMOR(op)) { |
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op->stats.ac--; |
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if (op->stats.ac < 0) |
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destroy = 1; |
| 221 |
} else if (op->type == FOOD) { |
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op->stats.food -= rndm(5,20); |
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if (op->stats.food < 0) |
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destroy = 1; |
| 225 |
} else { |
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if (op->material & M_PAPER || op->material & M_LEATHER || |
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op->material & M_WOOD || op->material & M_ORGANIC || |
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op->material & M_CLOTH || op->material & M_LIQUID) |
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destroy = 1; |
| 230 |
if (op->material & M_IRON && rndm(1,5) == 1) |
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destroy = 1; |
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if (op->material & M_GLASS && rndm(1,2) == 1) |
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destroy = 1; |
| 234 |
if ((op->material & M_STONE || op->material & M_ADAMANT) && |
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rndm(1,10) == 1) |
| 236 |
destroy = 1; |
| 237 |
if ((op->material & M_SOFT_METAL || op->material & M_BONE) && |
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rndm(1,3) == 1) |
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destroy = 1; |
| 240 |
if (op->material & M_ICE && MAP_TEMP(m) > 32) |
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destroy = 1; |
| 242 |
} |
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/* adjust overall chance below */ |
| 244 |
if (destroy && rndm(0, 1)) { |
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remove_ob(op); |
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free_object(op); |
| 247 |
} |
| 248 |
} |
| 249 |
} |
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|
| 251 |
/* convert materialname to materialtype_t */ |
| 252 |
|
| 253 |
materialtype_t *name_to_material(const char *name) |
| 254 |
{ |
| 255 |
materialtype_t *mt, *nmt; |
| 256 |
|
| 257 |
mt = NULL; |
| 258 |
for (nmt = materialt; nmt != NULL && nmt->next != NULL; nmt=nmt->next) { |
| 259 |
if (strcmp(name, nmt->name) == 0) { |
| 260 |
mt = nmt; |
| 261 |
break; |
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} |
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} |
| 264 |
return mt; |
| 265 |
} |
| 266 |
|
| 267 |
/* when doing transmutation of objects, we have to recheck the resistances, |
| 268 |
* as some that did not apply previously, may apply now. |
| 269 |
*/ |
| 270 |
|
| 271 |
void transmute_materialname(object *op, object *change) |
| 272 |
{ |
| 273 |
materialtype_t *mt; |
| 274 |
int j; |
| 275 |
|
| 276 |
if (op->materialname == NULL) |
| 277 |
return; |
| 278 |
|
| 279 |
if (change->materialname != NULL && |
| 280 |
strcmp(op->materialname, change->materialname)) |
| 281 |
return; |
| 282 |
|
| 283 |
if (!IS_ARMOR(op)) |
| 284 |
return; |
| 285 |
|
| 286 |
mt = name_to_material(op->materialname); |
| 287 |
|
| 288 |
for (j=0; j < NROFATTACKS; j++) |
| 289 |
if (op->resist[j] == 0 && change->resist[j] != 0) { |
| 290 |
op->resist[j] += mt->mod[j]; |
| 291 |
if (op->resist[j] > 100) |
| 292 |
op->resist[j] = 100; |
| 293 |
if (op->resist[j] < -100) |
| 294 |
op->resist[j] = -100; |
| 295 |
} |
| 296 |
} |
| 297 |
|
| 298 |
/* set the materialname and type for an item */ |
| 299 |
void set_materialname(object *op, int difficulty, materialtype_t *nmt) |
| 300 |
{ |
| 301 |
materialtype_t *mt, *lmt; |
| 302 |
int j; |
| 303 |
|
| 304 |
if (op->materialname != NULL) |
| 305 |
return; |
| 306 |
|
| 307 |
|
| 308 |
|
| 309 |
if (nmt == NULL) { |
| 310 |
lmt = NULL; |
| 311 |
#ifndef NEW_MATERIAL_CODE |
| 312 |
for (mt = materialt; mt != NULL && mt->next != NULL; mt=mt->next) { |
| 313 |
if (op->material & mt->material) { |
| 314 |
lmt = mt; |
| 315 |
break; |
| 316 |
} |
| 317 |
} |
| 318 |
|
| 319 |
#else |
| 320 |
for (mt = materialt; mt != NULL && mt->next != NULL; mt=mt->next) { |
| 321 |
if (op->material & mt->material && rndm(1, 100) <= mt->chance && |
| 322 |
difficulty >= mt->difficulty && |
| 323 |
(op->magic >= mt->magic || mt->magic == 0)) { |
| 324 |
lmt = mt; |
| 325 |
if (!(IS_WEAPON(op) || IS_ARMOR(op))) |
| 326 |
break; |
| 327 |
} |
| 328 |
} |
| 329 |
#endif |
| 330 |
} else { |
| 331 |
lmt = nmt; |
| 332 |
} |
| 333 |
|
| 334 |
if (lmt != NULL) { |
| 335 |
#ifndef NEW_MATERIAL_CODE |
| 336 |
op->materialname = add_string(lmt->name); |
| 337 |
return; |
| 338 |
#else |
| 339 |
|
| 340 |
if (op->stats.dam && IS_WEAPON(op)) { |
| 341 |
op->stats.dam += lmt->damage; |
| 342 |
if (op->stats.dam < 1) |
| 343 |
op->stats.dam = 1; |
| 344 |
} |
| 345 |
if (op->stats.sp && op->type == BOW) |
| 346 |
op->stats.sp += lmt->sp; |
| 347 |
if (op->stats.wc && IS_WEAPON(op)) |
| 348 |
op->stats.wc += lmt->wc; |
| 349 |
if (IS_ARMOR(op)) { |
| 350 |
if (op->stats.ac) |
| 351 |
op->stats.ac += lmt->ac; |
| 352 |
for (j=0; j < NROFATTACKS; j++) |
| 353 |
if (op->resist[j] != 0) { |
| 354 |
op->resist[j] += lmt->mod[j]; |
| 355 |
if (op->resist[j] > 100) |
| 356 |
op->resist[j] = 100; |
| 357 |
if (op->resist[j] < -100) |
| 358 |
op->resist[j] = -100; |
| 359 |
} |
| 360 |
} |
| 361 |
op->materialname = add_string(lmt->name); |
| 362 |
/* dont make it unstackable if it doesn't need to be */ |
| 363 |
if (IS_WEAPON(op) || IS_ARMOR(op)) { |
| 364 |
op->weight = (op->weight * lmt->weight)/100; |
| 365 |
op->value = (op->value * lmt->value)/100; |
| 366 |
} |
| 367 |
#endif |
| 368 |
} |
| 369 |
} |
| 370 |
|
| 371 |
/* |
| 372 |
* Strip out the media tags from a String. |
| 373 |
* Warning the input string will contain the result string |
| 374 |
*/ |
| 375 |
void strip_media_tag(char *message){ |
| 376 |
int in_tag=0; |
| 377 |
char* dest; |
| 378 |
char* src; |
| 379 |
src=dest=message; |
| 380 |
while (*src!='\0'){ |
| 381 |
if (*src=='['){ |
| 382 |
in_tag=1; |
| 383 |
} else if (in_tag && (*src==']')) |
| 384 |
in_tag=0; |
| 385 |
else if (!in_tag){ |
| 386 |
*dest=*src; |
| 387 |
dest++; |
| 388 |
} |
| 389 |
src++; |
| 390 |
} |
| 391 |
*dest='\0'; |
| 392 |
} |
| 393 |
|
| 394 |
const char* strrstr(const char* haystack, const char* needle){ |
| 395 |
const char* lastneedle; |
| 396 |
lastneedle=NULL; |
| 397 |
while((haystack=strstr(haystack,needle))!=NULL){ |
| 398 |
lastneedle=haystack; |
| 399 |
haystack++; |
| 400 |
} |
| 401 |
return lastneedle; |
| 402 |
|
| 403 |
} |
| 404 |
#define EOL_SIZE (sizeof("\n")-1) |
| 405 |
void strip_endline(char* buf){ |
| 406 |
if (strlen(buf)<sizeof("\n")){ |
| 407 |
return; |
| 408 |
} |
| 409 |
if (!strcmp(buf+strlen(buf)-EOL_SIZE,"\n")) |
| 410 |
buf[strlen(buf)-EOL_SIZE]='\0'; |
| 411 |
} |
| 412 |
|
| 413 |
/** |
| 414 |
* Replace in string src all occurrences of key by replacement. The resulting |
| 415 |
* string is put into result; at most resultsize characters (including the |
| 416 |
* terminating null character) will be written to result. |
| 417 |
*/ |
| 418 |
void replace(const char *src, const char *key, const char *replacement, char *result, size_t resultsize) |
| 419 |
{ |
| 420 |
size_t resultlen; |
| 421 |
size_t keylen; |
| 422 |
|
| 423 |
/* special case to prevent infinite loop if key==replacement=="" */ |
| 424 |
if(strcmp(key, replacement) == 0) |
| 425 |
{ |
| 426 |
snprintf(result, resultsize, "%s", src); |
| 427 |
return; |
| 428 |
} |
| 429 |
|
| 430 |
keylen = strlen(key); |
| 431 |
|
| 432 |
resultlen = 0; |
| 433 |
while(*src != '\0' && resultlen+1 < resultsize) |
| 434 |
{ |
| 435 |
if(strncmp(src, key, keylen) == 0) |
| 436 |
{ |
| 437 |
snprintf(result+resultlen, resultsize-resultlen, "%s", replacement); |
| 438 |
resultlen += strlen(result+resultlen); |
| 439 |
src += keylen; |
| 440 |
} |
| 441 |
else |
| 442 |
{ |
| 443 |
result[resultlen++] = *src++; |
| 444 |
} |
| 445 |
} |
| 446 |
result[resultlen] = '\0'; |
| 447 |
} |
| 448 |
|
| 449 |
/** |
| 450 |
* Taking a string as an argument, mutate it into a string that looks like a list. |
| 451 |
* a 'list' for the purposes here, is a string of items, seperated by commas, except |
| 452 |
* for the last entry, which has an 'and' before it, and a full stop (period) after it. |
| 453 |
* This function will also strip all trailing non alphanumeric characters. |
| 454 |
* It does not insert an oxford comma. |
| 455 |
*/ |
| 456 |
|
| 457 |
void make_list_like(char *input) { |
| 458 |
char *p, tmp[MAX_BUF]; |
| 459 |
int i; |
| 460 |
if (!input || strlen(input) > MAX_BUF-5) return; |
| 461 |
/* bad stuff would happen if we continued here, the -5 is to make space for ' and ' */ |
| 462 |
|
| 463 |
strncpy(tmp, input, MAX_BUF-5); |
| 464 |
/*trim all trailing commas, spaces etc.*/ |
| 465 |
for (i=strlen(tmp); !isalnum(tmp[i]) && i >= 0; i--) |
| 466 |
tmp[i]='\0'; |
| 467 |
strcat(tmp, "."); |
| 468 |
|
| 469 |
p=strrchr(tmp, ','); |
| 470 |
if (p) { |
| 471 |
*p='\0'; |
| 472 |
strcpy(input, tmp); |
| 473 |
p++; |
| 474 |
strcat(input, " and"); |
| 475 |
strcat(input, p); |
| 476 |
} |
| 477 |
else strcpy(input, tmp); |
| 478 |
return; |
| 479 |
} |
