server/common/friend.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>
*/

#include <global.h>

/*
 * Add a new friendly object to the linked list of friendly objects.
 * No checking to see if the object is already in the linked list is done.
 */

void
add_friendly_object (object *op)
{
  objectlink *ol;

  /* Add some error checking.  This shouldn't happen, but the friendly
   * object list usually isn't very long, and remove_friendly_object
   * won't remove it either.  Plus, it is easier to put a breakpoint in
   * the debugger here and see where the problem is happening. 
   */
  for (ol = first_friendly_object; ol != NULL; ol = ol->next)
    {
      if (ol->ob == op)
        {
          LOG (llevError, "add_friendly_object: Trying to add object already on list (%s)\n", &op->name);
          return;
        }
    }

  ol = first_friendly_object;
  first_friendly_object = get_objectlink ();
  first_friendly_object->ob = op;
  first_friendly_object->next = ol;
}

/*
 * Removes the specified object from the linked list of friendly objects.
 */

void
remove_friendly_object (object *op)
{
  objectlink *obj;

  CLEAR_FLAG (op, FLAG_FRIENDLY);

  if (!first_friendly_object)
    {
      LOG (llevError, "remove_friendly_object called with empty friendly list, remove ob=%s\n", &op->name);
      return;
    }
  /* if the first object happens to be the one, processing is pretty
   * easy.
   */
  if (first_friendly_object->ob == op)
    {
      obj = first_friendly_object;
      first_friendly_object = obj->next;
      delete obj;
    }
  else
    {
      objectlink *prev = first_friendly_object;

      for (obj = first_friendly_object->next; obj != NULL; obj = obj->next)
        {
          if (obj->ob == op)
            break;
          prev = obj;
        }

      if (obj)
        {
          prev->next = obj->next;
          delete obj;
        }
    }
}

/*
 * Dumps all friendly objects.  Invoked in DM-mode with the G key.
 */

void
dump_friendly_objects (void)
{
  objectlink *ol;

  for (ol = first_friendly_object; ol != NULL; ol = ol->next)
    LOG (llevError, "%s (%d)\n", &ol->ob->name, ol->ob->count);
}

/* New function, MSW 2000-1-14
 * It traverses the friendly list removing objects that should not be here
 * (ie, do not have friendly flag set, freed, etc)
 */
void
clean_friendly_list (void)
{
  objectlink *obj, *prev = NULL, *next;
  int count = 0;

  for (obj = first_friendly_object; obj; obj = next)
    {
      next = obj->next;
      if (QUERY_FLAG (obj->ob, FLAG_FREED) || !QUERY_FLAG (obj->ob, FLAG_FRIENDLY))
        {
          if (prev)
            prev->next = obj->next;
          else
            first_friendly_object = obj->next;

          count++;
          delete obj;
        }
      else
        /* If we removed the object, then prev is still valid.  */
        prev = obj;
    }

  if (count)
    LOG (llevDebug, "clean_friendly_list: Removed %d bogus links\n", count);
}

/* Checks if the given object is already in the friendly list or not
 * Lauwenmark - 31/07/05
 */
int
is_friendly (const object *op)
{
  objectlink *ol;

  for (ol = first_friendly_object; ol != NULL; ol = ol->next)
    if (ol->ob == op)
      return 1;

  return 0;
}
Revision:	1.7
Committed:	Sun Oct 15 02:16:34 2006 UTC (17 years, 8 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.6:	+11 -21 lines
Log Message:	more now invalid tag_t uses replaced by refcounting. reduced codesize quite a bit.
#	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	1.6	The authors can be reached via e-mail at <crossfire@schmorp.de>
22	elmex	1.1	*/
23
24			#include <global.h>
25
26			/*
27			* Add a new friendly object to the linked list of friendly objects.
28			* No checking to see if the object is already in the linked list is done.
29			*/
30
31	root	1.5	void
32			add_friendly_object (object *op)
33			{
34			objectlink *ol;
35	elmex	1.1
36	root	1.5	/* Add some error checking. This shouldn't happen, but the friendly
37			* object list usually isn't very long, and remove_friendly_object
38			* won't remove it either. Plus, it is easier to put a breakpoint in
39			* the debugger here and see where the problem is happening.
40			*/
41			for (ol = first_friendly_object; ol != NULL; ol = ol->next)
42			{
43			if (ol->ob == op)
44			{
45			LOG (llevError, "add_friendly_object: Trying to add object already on list (%s)\n", &op->name);
46			return;
47	root	1.2	}
48	elmex	1.1	}
49
50	root	1.5	ol = first_friendly_object;
51			first_friendly_object = get_objectlink ();
52			first_friendly_object->ob = op;
53			first_friendly_object->next = ol;
54	elmex	1.1	}
55
56			/*
57			* Removes the specified object from the linked list of friendly objects.
58			*/
59
60	root	1.5	void
61			remove_friendly_object (object *op)
62			{
63			objectlink *obj;
64	elmex	1.1
65	root	1.5	CLEAR_FLAG (op, FLAG_FRIENDLY);
66	elmex	1.1
67	root	1.5	if (!first_friendly_object)
68			{
69			LOG (llevError, "remove_friendly_object called with empty friendly list, remove ob=%s\n", &op->name);
70			return;
71			}
72			/* if the first object happens to be the one, processing is pretty
73			* easy.
74			*/
75			if (first_friendly_object->ob == op)
76			{
77			obj = first_friendly_object;
78			first_friendly_object = obj->next;
79	root	1.7	delete obj;
80	elmex	1.1	}
81	root	1.5	else
82			{
83			objectlink *prev = first_friendly_object;
84
85			for (obj = first_friendly_object->next; obj != NULL; obj = obj->next)
86			{
87			if (obj->ob == op)
88			break;
89			prev = obj;
90	root	1.2	}
91	root	1.7
92	root	1.5	if (obj)
93			{
94			prev->next = obj->next;
95	root	1.7	delete obj;
96	root	1.2	}
97	elmex	1.1	}
98			}
99
100			/*
101			* Dumps all friendly objects. Invoked in DM-mode with the G key.
102			*/
103
104	root	1.5	void
105			dump_friendly_objects (void)
106			{
107			objectlink *ol;
108	elmex	1.1
109	root	1.5	for (ol = first_friendly_object; ol != NULL; ol = ol->next)
110			LOG (llevError, "%s (%d)\n", &ol->ob->name, ol->ob->count);
111	elmex	1.1	}
112
113			/* New function, MSW 2000-1-14
114			* It traverses the friendly list removing objects that should not be here
115			* (ie, do not have friendly flag set, freed, etc)
116			*/
117	root	1.5	void
118			clean_friendly_list (void)
119			{
120			objectlink obj, prev = NULL, *next;
121			int count = 0;
122
123	root	1.7	for (obj = first_friendly_object; obj; obj = next)
124	root	1.5	{
125			next = obj->next;
126	root	1.7	if (QUERY_FLAG (obj->ob, FLAG_FREED) \|\| !QUERY_FLAG (obj->ob, FLAG_FRIENDLY))
127	root	1.5	{
128			if (prev)
129	root	1.7	prev->next = obj->next;
130	root	1.5	else
131	root	1.7	first_friendly_object = obj->next;
132
133	root	1.5	count++;
134	root	1.7	delete obj;
135	root	1.2	}
136	root	1.5	else
137	root	1.7	/* If we removed the object, then prev is still valid. */
138	root	1.5	prev = obj;
139	elmex	1.1	}
140	root	1.7
141	root	1.5	if (count)
142			LOG (llevDebug, "clean_friendly_list: Removed %d bogus links\n", count);
143	elmex	1.1	}
144
145			/* Checks if the given object is already in the friendly list or not
146			* Lauwenmark - 31/07/05
147			*/
148	root	1.5	int
149			is_friendly (const object *op)
150	elmex	1.1	{
151	root	1.5	objectlink *ol;
152	elmex	1.1
153	root	1.5	for (ol = first_friendly_object; ol != NULL; ol = ol->next)
154			if (ol->ob == op)
155			return 1;
156	elmex	1.1
157	root	1.5	return 0;
158	elmex	1.1	}