server/common/utils.C

/*
    CrossFire, A Multiplayer game for X-windows

    Copyright (C) 2002 Mark Wedel & Crossfire Development Team
    Copyright (C) 1992 Frank Tore Johansen

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

    The authors can be reached via e-mail at <crossfire@schmorp.de>
*/

/*
 * General convenience functions for crossfire.
 */

#include <global.h>
#include <funcpoint.h>
#include <material.h>

#include <sys/time.h>
#include <time.h>
#include <glib.h>

/*
 * The random functions here take luck into account when rolling random
 * dice or numbers.  This function has less of an impact the larger the
 * difference becomes in the random numbers.  IE, the effect is lessened
 * on a 1-1000 roll, vs a 1-6 roll.  This can be used by crafty programmers,
 * to specifically disable luck in certain rolls, simply by making the
 * numbers larger (ie, 1d1000 > 500 vs 1d6 > 3)
 */

/*
 * Roll a random number between min and max.  Uses op to determine luck,
 * and if goodbad is non-zero, luck increases the roll, if zero, it decreases.
 * Generally, op should be the player/caster/hitter requesting the roll,
 * not the recipient (ie, the poor slob getting hit). [garbled 20010916]
 */

int
random_roll (int min, int max, const object *op, int goodbad)
{
  int omin, diff, luck, base, ran;

  omin = min;
  diff = max - min + 1;
  ((diff > 2) ? (base = 20) : (base = 50));     /* d2 and d3 are corner cases */

  if (max < 1 || diff < 1)
    {
      LOG (llevError, "Calling random_roll with min=%d max=%d\n", min, max);
      return (min);             /* avoids a float exception */
    }

  ran = RANDOM ();

  if (op->type != PLAYER)
    return ((ran % diff) + min);

  luck = op->stats.luck;
  if (RANDOM () % base < MIN (10, abs (luck)))
    {
      /* we have a winner */
      ((luck > 0) ? (luck = 1) : (luck = -1));
      diff -= luck;
      if (diff < 1)
        return (omin);          /*check again */
      ((goodbad) ? (min += luck) : (diff));

      return (MAX (omin, MIN (max, (ran % diff) + min)));
    }
  return ((ran % diff) + min);
}

/*
 * This is a 64 bit version of random_roll above.  This is needed
 * for exp loss calculations for players changing religions.
 */

sint64
random_roll64 (sint64 min, sint64 max, const object *op, int goodbad)
{
  sint64 omin, diff, luck, ran;
  int base;

  omin = min;
  diff = max - min + 1;
  ((diff > 2) ? (base = 20) : (base = 50));     /* d2 and d3 are corner cases */

  if (max < 1 || diff < 1)
    {
      LOG (llevError, "Calling random_roll with min=%" PRId64 " max=%" PRId64 "\n", min, max);
      return (min);             /* avoids a float exception */
    }

  /* Don't know of a portable call to get 64 bit random values.
   * So make a call to get two 32 bit random numbers, and just to
   * a little byteshifting.  Do make sure the first one is only
   * 32 bit, so we don't get skewed results
   */
  ran = (RANDOM () & 0xffffffff) | ((sint64) RANDOM () << 32);

  if (op->type != PLAYER)
    return ((ran % diff) + min);

  luck = op->stats.luck;
  if (RANDOM () % base < MIN (10, abs (luck)))
    {
      /* we have a winner */
      ((luck > 0) ? (luck = 1) : (luck = -1));
      diff -= luck;
      if (diff < 1)
        return (omin);          /*check again */
      ((goodbad) ? (min += luck) : (diff));

      return (MAX (omin, MIN (max, (ran % diff) + min)));
    }
  return ((ran % diff) + min);
}

/*
 * Roll a number of dice (2d3, 4d6).  Uses op to determine luck,
 * If goodbad is non-zero, luck increases the roll, if zero, it decreases.
 * Generally, op should be the player/caster/hitter requesting the roll,
 * not the recipient (ie, the poor slob getting hit).
 * The args are num D size (ie 4d6)  [garbled 20010916]
 */

int
die_roll (int num, int size, const object *op, int goodbad)
{
  int min, diff, luck, total, i, gotlucky, base, ran;

  diff = size;
  min = 1;
  luck = total = gotlucky = 0;
  ((diff > 2) ? (base = 20) : (base = 50));     /* d2 and d3 are corner cases */
  if (size < 2 || diff < 1)
    {
      LOG (llevError, "Calling die_roll with num=%d size=%d\n", num, size);
      return (num);             /* avoids a float exception */
    }

  if (op->type == PLAYER)
    luck = op->stats.luck;

  for (i = 0; i < num; i++)
    {
      if (RANDOM () % base < MIN (10, abs (luck)) && !gotlucky)
        {
          /* we have a winner */
          gotlucky++;
          ((luck > 0) ? (luck = 1) : (luck = -1));
          diff -= luck;
          if (diff < 1)
            return (num);       /*check again */
          ((goodbad) ? (min += luck) : (diff));
          ran = RANDOM ();
          total += MAX (1, MIN (size, (ran % diff) + min));
        }
      else
        {
          total += RANDOM () % size + 1;
        }
    }
  return (total);
}

/*
 * Another convenience function.  Returns a number between min and max.
 * It is suggested one use these functions rather than RANDOM()%, as it
 * would appear that a number of off-by-one-errors exist due to improper
 * use of %.  This should also prevent SIGFPE.
 */

int
rndm (int min, int max)
{
  int diff;

  diff = max - min + 1;
  if (max < 1 || diff < 1)
    return (min);

  return (RANDOM () % diff + min);
}

/* decay and destroy perishable items in a map */
void
maptile::decay_objects ()
{
  if (!spaces)
    return;

  for (mapspace *ms = spaces + size (); ms-- > spaces; )
    for (object *above, *op = ms->bot; op; op = above)
      {
        above = op->above;

        bool destroy = 0;

        // do not decay anything above unique floor tiles (yet :)
        if (QUERY_FLAG (op, FLAG_IS_FLOOR) && QUERY_FLAG (op, FLAG_UNIQUE))
          break;

        if (QUERY_FLAG (op, FLAG_IS_FLOOR)
            || QUERY_FLAG (op, FLAG_OBJ_ORIGINAL)
            || QUERY_FLAG (op, FLAG_OBJ_SAVE_ON_OVL)
            || QUERY_FLAG (op, FLAG_UNIQUE)
            || QUERY_FLAG (op, FLAG_OVERLAY_FLOOR)
            || QUERY_FLAG (op, FLAG_UNPAID)
            || op->is_alive ())
          ; // do not decay
        else if (op->is_weapon ())
          {
            op->stats.dam--;
            if (op->stats.dam < 0)
              destroy = 1;
          }
        else if (op->is_armor ())
          {
            op->stats.ac--;
            if (op->stats.ac < 0)
              destroy = 1;
          }
        else if (op->type == FOOD)
          {
            op->stats.food -= rndm (5, 20);
            if (op->stats.food < 0)
              destroy = 1;
          }
        else
          {
            int mat = op->material;

            if (mat & M_PAPER
                || mat & M_LEATHER
                || mat & M_WOOD
                || mat & M_ORGANIC
                || mat & M_CLOTH
                || mat & M_LIQUID
                || (mat & M_IRON  && rndm (1, 5) == 1)
                || (mat & M_GLASS && rndm (1, 2) == 1)
                || ((mat & M_STONE      || mat & M_ADAMANT) && rndm (1, 10) == 1)
                || ((mat & M_SOFT_METAL || mat & M_BONE)    && rndm (1, 3)  == 1)
                || (mat & M_ICE && temp > 32))
              destroy = 1;
          }

        /* adjust overall chance below */
        if (destroy && rndm (0, 1))
          op->destroy ();
      }
}

/* convert materialname to materialtype_t */

materialtype_t *
name_to_material (const char *name)
{
  materialtype_t *mt, *nmt;

  mt = NULL;
  for (nmt = materialt; nmt != NULL && nmt->next != NULL; nmt = nmt->next)
    {
      if (strcmp (name, nmt->name) == 0)
        {
          mt = nmt;
          break;
        }
    }
  return mt;
}

/* when doing transmutation of objects, we have to recheck the resistances,
 * as some that did not apply previously, may apply now.
 */

void
transmute_materialname (object *op, const object *change)
{
  materialtype_t *mt;
  int j;

  if (op->materialname == NULL)
    return;

  if (change->materialname != NULL && strcmp (op->materialname, change->materialname))
    return;

  if (!op->is_armor ())
    return;

  mt = name_to_material (op->materialname);
  if (!mt)
    {
      LOG (llevError, "archetype '%s>%s' uses nonexistent material '%s'\n", &op->arch->name, &op->name, &op->materialname);
      return;
    }

  for (j = 0; j < NROFATTACKS; j++)
    if (op->resist[j] == 0 && change->resist[j] != 0)
      {
        op->resist[j] += mt->mod[j];
        if (op->resist[j] > 100)
          op->resist[j] = 100;
        if (op->resist[j] < -100)
          op->resist[j] = -100;
      }
}

/* set the materialname and type for an item */
void
set_materialname (object *op, int difficulty, materialtype_t *nmt)
{
  materialtype_t *mt, *lmt;

#ifdef NEW_MATERIAL_CODE
  int j;
#endif

  if (op->materialname != NULL)
    return;


  if (nmt == NULL)
    {
      lmt = NULL;
#ifndef NEW_MATERIAL_CODE
      for (mt = materialt; mt != NULL && mt->next != NULL; mt = mt->next)
        {
          if (op->material & mt->material)
            {
              lmt = mt;
              break;
            }
        }

#else
      for (mt = materialt; mt != NULL && mt->next != NULL; mt = mt->next)
        {
          if (op->material & mt->material && rndm (1, 100) <= mt->chance &&
              difficulty >= mt->difficulty && (op->magic >= mt->magic || mt->magic == 0))
            {
              lmt = mt;
              if (!(op->is_weapon () || op->is_armor ()))
                break;
            }
        }
#endif
    }
  else
    {
      lmt = nmt;
    }

  if (lmt != NULL)
    {
#ifndef NEW_MATERIAL_CODE
      op->materialname = lmt->name;
      return;
#else

      if (op->stats.dam && op->is_weapon ())
        {
          op->stats.dam += lmt->damage;
          if (op->stats.dam < 1)
            op->stats.dam = 1;
        }
      if (op->stats.sp && op->type == BOW)
        op->stats.sp += lmt->sp;
      if (op->stats.wc && op->is_weapon ())
        op->stats.wc += lmt->wc;
      if (op->is_armor ())
        {
          if (op->stats.ac)
            op->stats.ac += lmt->ac;
          for (j = 0; j < NROFATTACKS; j++)
            if (op->resist[j] != 0)
              {
                op->resist[j] += lmt->mod[j];
                if (op->resist[j] > 100)
                  op->resist[j] = 100;
                if (op->resist[j] < -100)
                  op->resist[j] = -100;
              }
        }
      op->materialname = add_string (lmt->name);
      /* dont make it unstackable if it doesn't need to be */
      if (op->is_weapon () || op->is_armor ())
        {
          op->weight = (op->weight * lmt->weight) / 100;
          op->value = (op->value * lmt->value) / 100;
        }
#endif
    }
}

/*
 * Strip out the media tags from a String.
 * Warning the input string will contain the result string
 */
void
strip_media_tag (char *message)
{
  int in_tag = 0;
  char *dest;
  char *src;

  src = dest = message;
  while (*src != '\0')
    {
      if (*src == '[')
        {
          in_tag = 1;
        }
      else if (in_tag && (*src == ']'))
        in_tag = 0;
      else if (!in_tag)
        {
          *dest = *src;
          dest++;
        }
      src++;
    }
  *dest = '\0';
}

const char *
strrstr (const char *haystack, const char *needle)
{
  const char *lastneedle;

  lastneedle = NULL;
  while ((haystack = strstr (haystack, needle)) != NULL)
    {
      lastneedle = haystack;
      haystack++;
    }
  return lastneedle;

}

#define EOL_SIZE (sizeof("\n")-1)
void
strip_endline (char *buf)
{
  if (strlen (buf) < sizeof ("\n"))
    {
      return;
    }
  if (!strcmp (buf + strlen (buf) - EOL_SIZE, "\n"))
    buf[strlen (buf) - EOL_SIZE] = '\0';
}

/**
 * Replace in string src all occurrences of key by replacement. The resulting
 * string is put into result; at most resultsize characters (including the
 * terminating null character) will be written to result.
 */
void
replace (const char *src, const char *key, const char *replacement, char *result, size_t resultsize)
{
  size_t resultlen;
  size_t keylen;

  /* special case to prevent infinite loop if key==replacement=="" */
  if (strcmp (key, replacement) == 0)
    {
      snprintf (result, resultsize, "%s", src);
      return;
    }

  keylen = strlen (key);

  resultlen = 0;
  while (*src != '\0' && resultlen + 1 < resultsize)
    {
      if (strncmp (src, key, keylen) == 0)
        {
          snprintf (result + resultlen, resultsize - resultlen, "%s", replacement);
          resultlen += strlen (result + resultlen);
          src += keylen;
        }
      else
        {
          result[resultlen++] = *src++;
        }
    }
  result[resultlen] = '\0';
}

/**
 * Taking a string as an argument, mutate it into a string that looks like a list.
 * a 'list' for the purposes here, is a string of items, seperated by commas, except
 * for the last entry, which has an 'and' before it, and a full stop (period) after it.
 * This function will also strip all trailing non alphanumeric characters.
 * It does not insert an oxford comma.
 */

void
make_list_like (char *input)
{
  char *p, tmp[MAX_BUF];
  int i;

  if (!input || strlen (input) > MAX_BUF - 5)
    return;
  /* bad stuff would happen if we continued here, the -5 is to make space for ' and ' */

  strncpy (tmp, input, MAX_BUF - 5);
  /*trim all trailing commas, spaces etc. */
  for (i = strlen (tmp); !isalnum (tmp[i]) && i >= 0; i--)
    tmp[i] = '\0';

  strcat (tmp, ".");

  p = strrchr (tmp, ',');
  if (p)
    {
      *p = '\0';
      strcpy (input, tmp);
      p++;
      strcat (input, " and");
      strcat (input, p);
    }
  else
    strcpy (input, tmp);

  return;
}

/////////////////////////////////////////////////////////////////////////////

void *salloc_ (int n) throw (std::bad_alloc)
{
  void *ptr = g_slice_alloc (n);

  if (!ptr)
    throw std::bad_alloc ();

  return ptr;
}

void *salloc_ (int n, void *src) throw (std::bad_alloc)
{
  void *ptr = salloc_ (n);

  if (src)
    memcpy (ptr, src, n);
  else
    memset (ptr, 0, n);

  return ptr;
}

void assign (char *dst, const char *src, int maxlen)
{
  if (!src)
    src = "";

  int len = strlen (src);

  if (len >= maxlen - 1)
    {
      if (maxlen <= 4)
        {
          memset (dst, '.', maxlen - 1);
          dst [maxlen - 1] = 0;
        }
      else
        {
          memcpy (dst, src, maxlen - 4);
          memcpy (dst + maxlen - 4, "...", 4);
        }
    }
  else
    memcpy (dst, src, len + 1);
}

tstamp now ()
{
  struct timeval tv;

  gettimeofday (&tv, 0);
  return tstamp (tv.tv_sec) + tstamp (tv.tv_usec) * tstamp (1e-6);
}

int
similar_direction (int a, int b)
{
  if (!a || !b)
    return 0;

  int diff = (b - a) & 7;
  return diff <= 1 || diff >= 7;
}

Revision:	1.35
Committed:	Mon Jan 1 13:31:46 2007 UTC (17 years, 4 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.34:	+60 -58 lines
Log Message:	this is close to working
#	User	Rev	Content
1	elmex	1.1	/*
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	root	1.15	The authors can be reached via e-mail at <crossfire@schmorp.de>
22	elmex	1.1	*/
23
24			/*
25			* General convenience functions for crossfire.
26			*/
27
28			#include <global.h>
29			#include <funcpoint.h>
30			#include <material.h>
31
32	root	1.23	#include <sys/time.h>
33			#include <time.h>
34	root	1.4	#include <glib.h>
35
36	elmex	1.1	/*
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
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)
43			*/
44
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	root	1.9	int
53			random_roll (int min, int max, const object *op, int goodbad)
54			{
55			int omin, diff, luck, base, ran;
56	elmex	1.1
57	root	1.9	omin = min;
58			diff = max - min + 1;
59			((diff > 2) ? (base = 20) : (base = 50)); /* d2 and d3 are corner cases */
60	elmex	1.1
61	root	1.9	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	elmex	1.1	}
66
67	root	1.9	ran = RANDOM ();
68	elmex	1.1
69	root	1.9	if (op->type != PLAYER)
70			return ((ran % diff) + min);
71	elmex	1.1
72	root	1.9	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	elmex	1.1
82	root	1.9	return (MAX (omin, MIN (max, (ran % diff) + min)));
83	elmex	1.1	}
84	root	1.9	return ((ran % diff) + min);
85	elmex	1.1	}
86
87			/*
88			* This is a 64 bit version of random_roll above. This is needed
89			* for exp loss calculations for players changing religions.
90			*/
91
92	root	1.9	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;
100			((diff > 2) ? (base = 20) : (base = 50)); /* d2 and d3 are corner cases */
101	elmex	1.1
102	root	1.9	if (max < 1 \|\| diff < 1)
103			{
104	root	1.20	LOG (llevError, "Calling random_roll with min=%" PRId64 " max=%" PRId64 "\n", min, max);
105	root	1.9	return (min); /* avoids a float exception */
106	elmex	1.1	}
107
108	root	1.9	/* 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
111			* 32 bit, so we don't get skewed results
112			*/
113			ran = (RANDOM () & 0xffffffff) \| ((sint64) RANDOM () << 32);
114
115			if (op->type != PLAYER)
116			return ((ran % diff) + min);
117
118			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	elmex	1.1
128	root	1.9	return (MAX (omin, MIN (max, (ran % diff) + min)));
129	elmex	1.1	}
130	root	1.9	return ((ran % diff) + min);
131	elmex	1.1	}
132
133			/*
134			* 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.
136			* 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	root	1.9	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	elmex	1.1
156	root	1.9	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	root	1.2	}
177	elmex	1.1	}
178	root	1.9	return (total);
179	elmex	1.1	}
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	root	1.9	int
189			rndm (int min, int max)
190	elmex	1.1	{
191			int diff;
192
193			diff = max - min + 1;
194			if (max < 1 \|\| diff < 1)
195	root	1.9	return (min);
196	elmex	1.1
197	root	1.9	return (RANDOM () % diff + min);
198	elmex	1.1	}
199
200	root	1.33	/* decay and destroy perishable items in a map */
201	root	1.9	void
202	root	1.32	maptile::decay_objects ()
203	elmex	1.1	{
204	root	1.35	if (!spaces)
205			return;
206
207			for (mapspace *ms = spaces + size (); ms-- > spaces; )
208			for (object above, op = ms->bot; op; op = above)
209			{
210			above = op->above;
211
212			bool destroy = 0;
213	root	1.32
214	root	1.35	// do not decay anything above unique floor tiles (yet :)
215			if (QUERY_FLAG (op, FLAG_IS_FLOOR) && QUERY_FLAG (op, FLAG_UNIQUE))
216			break;
217	root	1.32
218	root	1.35	if (QUERY_FLAG (op, FLAG_IS_FLOOR)
219			\|\| QUERY_FLAG (op, FLAG_OBJ_ORIGINAL)
220			\|\| QUERY_FLAG (op, FLAG_OBJ_SAVE_ON_OVL)
221			\|\| QUERY_FLAG (op, FLAG_UNIQUE)
222			\|\| QUERY_FLAG (op, FLAG_OVERLAY_FLOOR)
223			\|\| QUERY_FLAG (op, FLAG_UNPAID)
224			\|\| op->is_alive ())
225			; // do not decay
226			else if (op->is_weapon ())
227			{
228			op->stats.dam--;
229			if (op->stats.dam < 0)
230			destroy = 1;
231			}
232			else if (op->is_armor ())
233			{
234			op->stats.ac--;
235			if (op->stats.ac < 0)
236			destroy = 1;
237			}
238			else if (op->type == FOOD)
239			{
240			op->stats.food -= rndm (5, 20);
241			if (op->stats.food < 0)
242			destroy = 1;
243			}
244			else
245			{
246			int mat = op->material;
247
248			if (mat & M_PAPER
249			\|\| mat & M_LEATHER
250			\|\| mat & M_WOOD
251			\|\| mat & M_ORGANIC
252			\|\| mat & M_CLOTH
253			\|\| mat & M_LIQUID
254			\|\| (mat & M_IRON && rndm (1, 5) == 1)
255			\|\| (mat & M_GLASS && rndm (1, 2) == 1)
256			\|\| ((mat & M_STONE \|\| mat & M_ADAMANT) && rndm (1, 10) == 1)
257			\|\| ((mat & M_SOFT_METAL \|\| mat & M_BONE) && rndm (1, 3) == 1)
258			\|\| (mat & M_ICE && temp > 32))
259			destroy = 1;
260			}
261
262			/* adjust overall chance below */
263			if (destroy && rndm (0, 1))
264			op->destroy ();
265			}
266	elmex	1.1	}
267
268			/* convert materialname to materialtype_t */
269
270	root	1.9	materialtype_t *
271			name_to_material (const char *name)
272	elmex	1.1	{
273	root	1.9	materialtype_t mt, nmt;
274	elmex	1.1
275	root	1.9	mt = NULL;
276			for (nmt = materialt; nmt != NULL && nmt->next != NULL; nmt = nmt->next)
277			{
278			if (strcmp (name, nmt->name) == 0)
279			{
280			mt = nmt;
281			break;
282	root	1.2	}
283	elmex	1.1	}
284	root	1.9	return mt;
285	elmex	1.1	}
286
287			/* when doing transmutation of objects, we have to recheck the resistances,
288			* as some that did not apply previously, may apply now.
289			*/
290
291	root	1.9	void
292			transmute_materialname (object op, const object change)
293	elmex	1.1	{
294	root	1.9	materialtype_t *mt;
295			int j;
296	elmex	1.1
297	root	1.9	if (op->materialname == NULL)
298			return;
299	elmex	1.1
300	root	1.9	if (change->materialname != NULL && strcmp (op->materialname, change->materialname))
301			return;
302
303	root	1.26	if (!op->is_armor ())
304	root	1.9	return;
305
306			mt = name_to_material (op->materialname);
307			if (!mt)
308			{
309			LOG (llevError, "archetype '%s>%s' uses nonexistent material '%s'\n", &op->arch->name, &op->name, &op->materialname);
310			return;
311			}
312
313			for (j = 0; j < NROFATTACKS; j++)
314			if (op->resist[j] == 0 && change->resist[j] != 0)
315			{
316			op->resist[j] += mt->mod[j];
317			if (op->resist[j] > 100)
318			op->resist[j] = 100;
319			if (op->resist[j] < -100)
320			op->resist[j] = -100;
321			}
322	elmex	1.1	}
323
324			/* set the materialname and type for an item */
325	root	1.9	void
326			set_materialname (object op, int difficulty, materialtype_t nmt)
327	elmex	1.1	{
328	root	1.9	materialtype_t mt, lmt;
329
330	pippijn	1.5	#ifdef NEW_MATERIAL_CODE
331	root	1.9	int j;
332	pippijn	1.5	#endif
333	elmex	1.1
334	root	1.9	if (op->materialname != NULL)
335			return;
336	elmex	1.1
337
338
339	root	1.9	if (nmt == NULL)
340			{
341			lmt = NULL;
342	elmex	1.1	#ifndef NEW_MATERIAL_CODE
343	root	1.9	for (mt = materialt; mt != NULL && mt->next != NULL; mt = mt->next)
344			{
345			if (op->material & mt->material)
346			{
347			lmt = mt;
348			break;
349	root	1.2	}
350			}
351	elmex	1.1
352			#else
353	root	1.9	for (mt = materialt; mt != NULL && mt->next != NULL; mt = mt->next)
354			{
355			if (op->material & mt->material && rndm (1, 100) <= mt->chance &&
356			difficulty >= mt->difficulty && (op->magic >= mt->magic \|\| mt->magic == 0))
357			{
358			lmt = mt;
359	root	1.26	if (!(op->is_weapon () \|\| op->is_armor ()))
360	root	1.9	break;
361	root	1.2	}
362			}
363	elmex	1.1	#endif
364	root	1.9	}
365			else
366			{
367			lmt = nmt;
368	elmex	1.1	}
369
370	root	1.9	if (lmt != NULL)
371			{
372	elmex	1.1	#ifndef NEW_MATERIAL_CODE
373	root	1.9	op->materialname = lmt->name;
374			return;
375	elmex	1.1	#else
376
377	root	1.26	if (op->stats.dam && op->is_weapon ())
378	root	1.9	{
379			op->stats.dam += lmt->damage;
380			if (op->stats.dam < 1)
381			op->stats.dam = 1;
382			}
383			if (op->stats.sp && op->type == BOW)
384			op->stats.sp += lmt->sp;
385	root	1.26	if (op->stats.wc && op->is_weapon ())
386	root	1.9	op->stats.wc += lmt->wc;
387	root	1.26	if (op->is_armor ())
388	root	1.9	{
389			if (op->stats.ac)
390			op->stats.ac += lmt->ac;
391			for (j = 0; j < NROFATTACKS; j++)
392			if (op->resist[j] != 0)
393			{
394			op->resist[j] += lmt->mod[j];
395			if (op->resist[j] > 100)
396			op->resist[j] = 100;
397			if (op->resist[j] < -100)
398			op->resist[j] = -100;
399			}
400			}
401			op->materialname = add_string (lmt->name);
402			/* dont make it unstackable if it doesn't need to be */
403	root	1.26	if (op->is_weapon () \|\| op->is_armor ())
404	root	1.9	{
405			op->weight = (op->weight * lmt->weight) / 100;
406			op->value = (op->value * lmt->value) / 100;
407	root	1.2	}
408	elmex	1.1	#endif
409			}
410			}
411
412			/*
413			* Strip out the media tags from a String.
414			* Warning the input string will contain the result string
415			*/
416	root	1.9	void
417			strip_media_tag (char *message)
418			{
419			int in_tag = 0;
420			char *dest;
421			char *src;
422
423			src = dest = message;
424			while (*src != '\0')
425			{
426			if (*src == '[')
427			{
428			in_tag = 1;
429			}
430			else if (in_tag && (*src == ']'))
431			in_tag = 0;
432			else if (!in_tag)
433			{
434			dest = src;
435			dest++;
436			}
437			src++;
438			}
439			*dest = '\0';
440			}
441
442			const char *
443			strrstr (const char haystack, const char needle)
444			{
445			const char *lastneedle;
446
447			lastneedle = NULL;
448			while ((haystack = strstr (haystack, needle)) != NULL)
449			{
450			lastneedle = haystack;
451			haystack++;
452	elmex	1.1	}
453	root	1.9	return lastneedle;
454
455	elmex	1.1	}
456	root	1.9
457	elmex	1.1	#define EOL_SIZE (sizeof("\n")-1)
458	root	1.9	void
459			strip_endline (char *buf)
460			{
461			if (strlen (buf) < sizeof ("\n"))
462			{
463			return;
464	elmex	1.1	}
465	root	1.9	if (!strcmp (buf + strlen (buf) - EOL_SIZE, "\n"))
466			buf[strlen (buf) - EOL_SIZE] = '\0';
467	elmex	1.1	}
468
469			/**
470			* Replace in string src all occurrences of key by replacement. The resulting
471			* string is put into result; at most resultsize characters (including the
472			* terminating null character) will be written to result.
473			*/
474	root	1.9	void
475			replace (const char src, const char key, const char replacement, char result, size_t resultsize)
476	elmex	1.1	{
477	root	1.9	size_t resultlen;
478			size_t keylen;
479	elmex	1.1
480	root	1.9	/* special case to prevent infinite loop if key==replacement=="" */
481			if (strcmp (key, replacement) == 0)
482			{
483			snprintf (result, resultsize, "%s", src);
484			return;
485			}
486
487			keylen = strlen (key);
488
489			resultlen = 0;
490			while (*src != '\0' && resultlen + 1 < resultsize)
491			{
492			if (strncmp (src, key, keylen) == 0)
493	root	1.2	{
494	root	1.9	snprintf (result + resultlen, resultsize - resultlen, "%s", replacement);
495			resultlen += strlen (result + resultlen);
496			src += keylen;
497	root	1.2	}
498	root	1.9	else
499	root	1.2	{
500	root	1.9	result[resultlen++] = *src++;
501	root	1.2	}
502	root	1.9	}
503			result[resultlen] = '\0';
504	elmex	1.1	}
505
506			/**
507			* Taking a string as an argument, mutate it into a string that looks like a list.
508			* a 'list' for the purposes here, is a string of items, seperated by commas, except
509			* for the last entry, which has an 'and' before it, and a full stop (period) after it.
510			* This function will also strip all trailing non alphanumeric characters.
511			* It does not insert an oxford comma.
512			*/
513
514	root	1.9	void
515			make_list_like (char *input)
516			{
517			char *p, tmp[MAX_BUF];
518			int i;
519
520			if (!input \|\| strlen (input) > MAX_BUF - 5)
521	elmex	1.1	return;
522	root	1.9	/* bad stuff would happen if we continued here, the -5 is to make space for ' and ' */
523
524			strncpy (tmp, input, MAX_BUF - 5);
525			/trim all trailing commas, spaces etc. /
526			for (i = strlen (tmp); !isalnum (tmp[i]) && i >= 0; i--)
527			tmp[i] = '\0';
528	root	1.11
529	root	1.9	strcat (tmp, ".");
530
531			p = strrchr (tmp, ',');
532			if (p)
533			{
534			*p = '\0';
535			strcpy (input, tmp);
536			p++;
537			strcat (input, " and");
538			strcat (input, p);
539			}
540			else
541			strcpy (input, tmp);
542	root	1.11
543	root	1.9	return;
544	elmex	1.1	}
545	root	1.3
546	root	1.14	/////////////////////////////////////////////////////////////////////////////
547
548	root	1.25	void *salloc_ (int n) throw (std::bad_alloc)
549	root	1.10	{
550	root	1.25	void *ptr = g_slice_alloc (n);
551	root	1.13
552	root	1.23	if (!ptr)
553	root	1.13	throw std::bad_alloc ();
554	root	1.4
555	root	1.23	return ptr;
556			}
557
558	root	1.25	void salloc_ (int n, void src) throw (std::bad_alloc)
559	root	1.23	{
560	root	1.25	void *ptr = salloc_ (n);
561	root	1.23
562	root	1.24	if (src)
563	root	1.25	memcpy (ptr, src, n);
564	root	1.24	else
565	root	1.25	memset (ptr, 0, n);
566	root	1.23
567			return ptr;
568	root	1.3	}
569	root	1.11
570			void assign (char dst, const char src, int maxlen)
571			{
572			if (!src)
573			src = "";
574
575			int len = strlen (src);
576
577			if (len >= maxlen - 1)
578			{
579			if (maxlen <= 4)
580			{
581			memset (dst, '.', maxlen - 1);
582			dst [maxlen - 1] = 0;
583			}
584			else
585			{
586			memcpy (dst, src, maxlen - 4);
587			memcpy (dst + maxlen - 4, "...", 4);
588			}
589			}
590			else
591			memcpy (dst, src, len + 1);
592			}
593
594	root	1.23	tstamp now ()
595			{
596			struct timeval tv;
597
598			gettimeofday (&tv, 0);
599			return tstamp (tv.tv_sec) + tstamp (tv.tv_usec) * tstamp (1e-6);
600			}
601	root	1.17
602	root	1.32	int
603			similar_direction (int a, int b)
604			{
605			if (!a \|\| !b)
606			return 0;
607
608			int diff = (b - a) & 7;
609			return diff <= 1 \|\| diff >= 7;
610			}
611