server/server/c_range.C

/*
 * CrossFire, A Multiplayer game
 *
 * Copyright (C) 2005, 2006, 2007 Marc Lehmann & Crossfire+ Development Team
 * 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>
 */

/* This file deals with range related commands (casting, shooting,
 * throwing, etc.
 */

#include <global.h>
#include <sproto.h>
#include <spells.h>
#include <skills.h>
#include <commands.h>

int
command_invoke (object *op, char *params)
{
  return command_cast_spell (op, params, 'i');
}

int
command_cast (object *op, char *params)
{
  return command_cast_spell (op, params, 'c');
}

int
command_prepare (object *op, char *params)
{
  return command_cast_spell (op, params, 'p');
}

/* Shows all spells that op knows.  If params is supplied, the must match
 * that.  Given there is more than one skill, we can't supply break
 * them down to cleric/wizardry.
 */
static void
show_matching_spells (object *op, char *params)
{
  object *spell;
  char spell_sort[NROFREALSPELLS][MAX_BUF], tmp[MAX_BUF], *cp;
  int num_found = 0, i;

  /* We go and see what spells the player has.  We put them
   * into the spell_sort array so that we can sort them -
   * we prefix the skill in the name so that the sorting
   * works better.
   */
  for (spell = op->inv; spell != NULL; spell = spell->below)
    {
      /* If it is a spell, and no params are passed, or they
       * match the name, process this spell.
       */
      if (spell->type == SPELL && (!params || !strncmp (params, spell->name, strlen (params))))
        {
          if (spell->path_attuned & op->path_denied)
            {
              sprintf (spell_sort[num_found++], "%s:%-22s %3s %3s", spell->skill ? &spell->skill : "generic", &spell->name, "den", "den");
            }
          else
            {
              sprintf (spell_sort[num_found++],
                       "%s:%-22s %3d %3d", spell->skill ? &spell->skill : "generic",
                       &spell->name, spell->level, SP_level_spellpoint_cost (op, spell, SPELL_HIGHEST));
            }
        }
    }
  if (!num_found)
    {
      /* If a matching string was passed along, now try it without that
       * string.  It is odd to do something like 'cast trans',
       * and it say you have no spells, when really, you do, but just
       * nothing that matches.
       */
      if (params)
        show_matching_spells (op, NULL);
      else
        new_draw_info (NDI_UNIQUE, 0, op, "You know no spells");
    }
  else
    {
      /* Note in the code below that we make some
       * presumptions that there will be a colon in the
       * string.  given the code above, this is always
       * the case.
       */
      qsort (spell_sort, num_found, MAX_BUF, (int (*)(const void *, const void *)) std::strcmp);
      strcpy (tmp, "asdfg");    /* Dummy string so initial compare fails */
      for (i = 0; i < num_found; i++)
        {
          /* Different skill name, so print banner */
          if (strncmp (tmp, spell_sort[i], strlen (tmp)))
            {
              strcpy (tmp, spell_sort[i]);
              cp = strchr (tmp, ':');
              *cp = '\0';
              new_draw_info (NDI_UNIQUE, 0, op, "");
              new_draw_info_format (NDI_UNIQUE, 0, op, "%s spells %.*s [lvl] [sp]", tmp, 12 - strlen (tmp), "              ");
            }
          new_draw_info (NDI_UNIQUE, 0, op, strchr (spell_sort[i], ':') + 1);
        }
    }
}

/* sets up to cast a spell.  op is the caster, params is the spell name,
 * and command is the first letter of the spell type (c=cast, i=invoke, 
 * p=prepare).  Invoke casts a spell immediately, where as cast (and I believe
 * prepare) just set up the range type.
 */
int
command_cast_spell (object *op, char *params, char command)
{
  int castnow = 0;
  char *cp;
  object *spob;

  if (command == 'i')
    castnow = 1;

  /* Remove control of the golem */
  if (object *golem = op->contr->ranges[range_golem])
    golem->destroy ();

  if (params)
    {
      int spellnumber = 0;

      if ((spellnumber = atoi (params)))
        for (spob = op->inv; spob && spob->count != spellnumber; spob = spob->below)
          /* nop */;
      else
        spob = lookup_spell_by_name (op, params);

      if (spob && spob->type == SPELL)
        {
          /* Now grab any extra data, if there is any.  Forward pass
           * any 'of' delimiter
           */
          if (spellnumber)
            {
              /* if we passed a number, the options start at the second word */
              cp = strchr (params, ' ');
              if (cp)
                {
                  cp++;
                  if (!strncmp (cp, "of ", 3))
                    cp += 3;
                }
            }
          else if (strlen (params) > (size_t) strlen (spob->name))
            {
              cp = params + strlen (spob->name);
              *cp = 0;
              cp++;
              if (!strncmp (cp, "of ", 3))
                cp += 3;
            }
          else
            cp = NULL;

          if (spob->skill && !find_skill_by_name (op, spob->skill))
            {
              new_draw_info_format (NDI_UNIQUE, 0, op, "You need the skill %s to cast %s!", &spob->skill, &spob->name);
              return 1;
            }

          if (castnow)
            cast_spell (op, op, op->facing, spob, cp);
          else
            {
              op->contr->ranges[range_magic] = spob;
              op->contr->shoottype = range_magic;
              assign (op->contr->spellparam, cp ? cp : "");
              new_draw_info_format (NDI_UNIQUE, 0, op, "You ready the spell %s", &spob->name);
            }

          return 0;
        }                       /* else fall through to below and print spells */
    }                           /* params supplied */

  /* We get here if cast was given without options or we could not find
   * the requested spell.  List all the spells the player knows.
   */
  new_draw_info (NDI_UNIQUE, 0, op, "Cast what spell?  Choose one of:");
  show_matching_spells (op, params);
  return 1;
}

/**************************************************************************/

/* Returns TRUE if the range specified (int r) is legal - that is,
 * the character has an item that is equipped for that range type.
 * return 0 if there is no item of that range type that is usable.
 * This function could probably be simplified, eg, everything
 * should index into the ranges[] array.
 */

int
legal_range (object *op, int r)
{
  switch (r)
    {
        case range_none:       /* "Nothing" is always legal */
          return 1;

        case range_bow:
        case range_misc:
        case range_magic:      /* cast spells */
          return !!op->contr->ranges[r];

        case range_golem:      /* Use scrolls */
          return !!op->contr->ranges[range_golem];

        case range_skill:
          return !!op->chosen_skill;
    }

  /* No match above, must not be valid */
  return 0;
}

void
change_spell (object *op, char k)
{
  do
    {
      op->contr->shoottype = (rangetype) (op->contr->shoottype + ((k == '+') ? 1 : -1));
      if (op->contr->shoottype >= range_size)
        op->contr->shoottype = range_none;
      else if (op->contr->shoottype <= range_bottom)
        op->contr->shoottype = (rangetype) (range_size - 1);
    }
  while (!legal_range (op, op->contr->shoottype));
  
  /* Legal range has already checked that we have an appropriate item
   * that uses the slot, so we don't need to be too careful about 
   * checking the status of the object.
   */
  switch (op->contr->shoottype)
    {
        case range_none:
          new_draw_info (NDI_UNIQUE, 0, op, "No ranged attack chosen.");
          break;

        case range_golem:
          new_draw_info (NDI_UNIQUE, 0, op, "You regain control of your golem.");
          break;

        case range_bow:
          new_draw_info_format (NDI_UNIQUE, 0, op, "Switched to %s and %s.", query_name (op->contr->ranges[range_bow]),
                                op->contr->ranges[range_bow]->race ? &op->contr->ranges[range_bow]->race : "nothing");
          break;

        case range_magic:
          new_draw_info_format (NDI_UNIQUE, 0, op, "Switched to spells (%s).", &op->contr->ranges[range_magic]->name);
          break;

        case range_misc:
          new_draw_info_format (NDI_UNIQUE, 0, op, "Switched to %s.", query_base_name (op->contr->ranges[range_misc], 0));
          break;

        case range_skill:
          new_draw_info_format (NDI_UNIQUE, 0, op, "Switched to skill: %s", op->chosen_skill ? &op->chosen_skill->name : "none");
          break;

        default:
          break;
    }
}


int
command_rotateshoottype (object *op, char *params)
{
  if (!params)
    change_spell (op, '+');
  else
    change_spell (op, params[0]);
  return 0;
}
Revision:	1.18
Committed:	Tue Apr 24 12:32:16 2007 UTC (17 years, 1 month ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.17:	+8 -12 lines
Log Message:	server crashed this morning because a freed golem tried to follow his owner, triggering the assertion failure. the golem had no owner, but the owner still had him in his range slots. I refactored a bit of the code and rearranged it to hopefully increase chances of this not occuring again.
#	Content
1	/*
2	* CrossFire, A Multiplayer game
3	*
4	* Copyright (C) 2005, 2006, 2007 Marc Lehmann & Crossfire+ Development Team
5	* Copyright (C) 2002 Mark Wedel & Crossfire Development Team
6	* Copyright (C) 1992 Frank Tore Johansen
7	*
8	* This program is free software; you can redistribute it and/or modify
9	* it under the terms of the GNU General Public License as published by
10	* the Free Software Foundation; either version 2 of the License, or
11	* (at your option) any later version.
12	*
13	* This program is distributed in the hope that it will be useful,
14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16	* GNU General Public License for more details.
17	*
18	* You should have received a copy of the GNU General Public License
19	* along with this program; if not, write to the Free Software
20	* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21	*
22	* The authors can be reached via e-mail at <crossfire@schmorp.de>
23	*/
24
25	/* This file deals with range related commands (casting, shooting,
26	* throwing, etc.
27	*/
28
29	#include <global.h>
30	#include <sproto.h>
31	#include <spells.h>
32	#include <skills.h>
33	#include <commands.h>
34
35	int
36	command_invoke (object op, char params)
37	{
38	return command_cast_spell (op, params, 'i');
39	}
40
41	int
42	command_cast (object op, char params)
43	{
44	return command_cast_spell (op, params, 'c');
45	}
46
47	int
48	command_prepare (object op, char params)
49	{
50	return command_cast_spell (op, params, 'p');
51	}
52
53	/* Shows all spells that op knows. If params is supplied, the must match
54	* that. Given there is more than one skill, we can't supply break
55	* them down to cleric/wizardry.
56	*/
57	static void
58	show_matching_spells (object op, char params)
59	{
60	object *spell;
61	char spell_sort[NROFREALSPELLS][MAX_BUF], tmp[MAX_BUF], *cp;
62	int num_found = 0, i;
63
64	/* We go and see what spells the player has. We put them
65	* into the spell_sort array so that we can sort them -
66	* we prefix the skill in the name so that the sorting
67	* works better.
68	*/
69	for (spell = op->inv; spell != NULL; spell = spell->below)
70	{
71	/* If it is a spell, and no params are passed, or they
72	* match the name, process this spell.
73	*/
74	if (spell->type == SPELL && (!params \|\| !strncmp (params, spell->name, strlen (params))))
75	{
76	if (spell->path_attuned & op->path_denied)
77	{
78	sprintf (spell_sort[num_found++], "%s:%-22s %3s %3s", spell->skill ? &spell->skill : "generic", &spell->name, "den", "den");
79	}
80	else
81	{
82	sprintf (spell_sort[num_found++],
83	"%s:%-22s %3d %3d", spell->skill ? &spell->skill : "generic",
84	&spell->name, spell->level, SP_level_spellpoint_cost (op, spell, SPELL_HIGHEST));
85	}
86	}
87	}
88	if (!num_found)
89	{
90	/* If a matching string was passed along, now try it without that
91	* string. It is odd to do something like 'cast trans',
92	* and it say you have no spells, when really, you do, but just
93	* nothing that matches.
94	*/
95	if (params)
96	show_matching_spells (op, NULL);
97	else
98	new_draw_info (NDI_UNIQUE, 0, op, "You know no spells");
99	}
100	else
101	{
102	/* Note in the code below that we make some
103	* presumptions that there will be a colon in the
104	* string. given the code above, this is always
105	* the case.
106	*/
107	qsort (spell_sort, num_found, MAX_BUF, (int ()(const void , const void *)) std::strcmp);
108	strcpy (tmp, "asdfg"); /* Dummy string so initial compare fails */
109	for (i = 0; i < num_found; i++)
110	{
111	/* Different skill name, so print banner */
112	if (strncmp (tmp, spell_sort[i], strlen (tmp)))
113	{
114	strcpy (tmp, spell_sort[i]);
115	cp = strchr (tmp, ':');
116	*cp = '\0';
117	new_draw_info (NDI_UNIQUE, 0, op, "");
118	new_draw_info_format (NDI_UNIQUE, 0, op, "%s spells %.*s [lvl] [sp]", tmp, 12 - strlen (tmp), " ");
119	}
120	new_draw_info (NDI_UNIQUE, 0, op, strchr (spell_sort[i], ':') + 1);
121	}
122	}
123	}
124
125	/* sets up to cast a spell. op is the caster, params is the spell name,
126	* and command is the first letter of the spell type (c=cast, i=invoke,
127	* p=prepare). Invoke casts a spell immediately, where as cast (and I believe
128	* prepare) just set up the range type.
129	*/
130	int
131	command_cast_spell (object op, char params, char command)
132	{
133	int castnow = 0;
134	char *cp;
135	object *spob;
136
137	if (command == 'i')
138	castnow = 1;
139
140	/* Remove control of the golem */
141	if (object *golem = op->contr->ranges[range_golem])
142	golem->destroy ();
143
144	if (params)
145	{
146	int spellnumber = 0;
147
148	if ((spellnumber = atoi (params)))
149	for (spob = op->inv; spob && spob->count != spellnumber; spob = spob->below)
150	/* nop */;
151	else
152	spob = lookup_spell_by_name (op, params);
153
154	if (spob && spob->type == SPELL)
155	{
156	/* Now grab any extra data, if there is any. Forward pass
157	* any 'of' delimiter
158	*/
159	if (spellnumber)
160	{
161	/* if we passed a number, the options start at the second word */
162	cp = strchr (params, ' ');
163	if (cp)
164	{
165	cp++;
166	if (!strncmp (cp, "of ", 3))
167	cp += 3;
168	}
169	}
170	else if (strlen (params) > (size_t) strlen (spob->name))
171	{
172	cp = params + strlen (spob->name);
173	*cp = 0;
174	cp++;
175	if (!strncmp (cp, "of ", 3))
176	cp += 3;
177	}
178	else
179	cp = NULL;
180
181	if (spob->skill && !find_skill_by_name (op, spob->skill))
182	{
183	new_draw_info_format (NDI_UNIQUE, 0, op, "You need the skill %s to cast %s!", &spob->skill, &spob->name);
184	return 1;
185	}
186
187	if (castnow)
188	cast_spell (op, op, op->facing, spob, cp);
189	else
190	{
191	op->contr->ranges[range_magic] = spob;
192	op->contr->shoottype = range_magic;
193	assign (op->contr->spellparam, cp ? cp : "");
194	new_draw_info_format (NDI_UNIQUE, 0, op, "You ready the spell %s", &spob->name);
195	}
196
197	return 0;
198	} /* else fall through to below and print spells */
199	} /* params supplied */
200
201	/* We get here if cast was given without options or we could not find
202	* the requested spell. List all the spells the player knows.
203	*/
204	new_draw_info (NDI_UNIQUE, 0, op, "Cast what spell? Choose one of:");
205	show_matching_spells (op, params);
206	return 1;
207	}
208
209	/**************************************************************************/
210
211	/* Returns TRUE if the range specified (int r) is legal - that is,
212	* the character has an item that is equipped for that range type.
213	* return 0 if there is no item of that range type that is usable.
214	* This function could probably be simplified, eg, everything
215	* should index into the ranges[] array.
216	*/
217
218	int
219	legal_range (object *op, int r)
220	{
221	switch (r)
222	{
223	case range_none: /* "Nothing" is always legal */
224	return 1;
225
226	case range_bow:
227	case range_misc:
228	case range_magic: /* cast spells */
229	return !!op->contr->ranges[r];
230
231	case range_golem: /* Use scrolls */
232	return !!op->contr->ranges[range_golem];
233
234	case range_skill:
235	return !!op->chosen_skill;
236	}
237
238	/* No match above, must not be valid */
239	return 0;
240	}
241
242	void
243	change_spell (object *op, char k)
244	{
245	do
246	{
247	op->contr->shoottype = (rangetype) (op->contr->shoottype + ((k == '+') ? 1 : -1));
248	if (op->contr->shoottype >= range_size)
249	op->contr->shoottype = range_none;
250	else if (op->contr->shoottype <= range_bottom)
251	op->contr->shoottype = (rangetype) (range_size - 1);
252	}
253	while (!legal_range (op, op->contr->shoottype));
254
255	/* Legal range has already checked that we have an appropriate item
256	* that uses the slot, so we don't need to be too careful about
257	* checking the status of the object.
258	*/
259	switch (op->contr->shoottype)
260	{
261	case range_none:
262	new_draw_info (NDI_UNIQUE, 0, op, "No ranged attack chosen.");
263	break;
264
265	case range_golem:
266	new_draw_info (NDI_UNIQUE, 0, op, "You regain control of your golem.");
267	break;
268
269	case range_bow:
270	new_draw_info_format (NDI_UNIQUE, 0, op, "Switched to %s and %s.", query_name (op->contr->ranges[range_bow]),
271	op->contr->ranges[range_bow]->race ? &op->contr->ranges[range_bow]->race : "nothing");
272	break;
273
274	case range_magic:
275	new_draw_info_format (NDI_UNIQUE, 0, op, "Switched to spells (%s).", &op->contr->ranges[range_magic]->name);
276	break;
277
278	case range_misc:
279	new_draw_info_format (NDI_UNIQUE, 0, op, "Switched to %s.", query_base_name (op->contr->ranges[range_misc], 0));
280	break;
281
282	case range_skill:
283	new_draw_info_format (NDI_UNIQUE, 0, op, "Switched to skill: %s", op->chosen_skill ? &op->chosen_skill->name : "none");
284	break;
285
286	default:
287	break;
288	}
289	}
290
291
292	int
293	command_rotateshoottype (object op, char params)
294	{
295	if (!params)
296	change_spell (op, '+');
297	else
298	change_spell (op, params[0]);
299	return 0;
300	}