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.
#	User	Rev	Content
1	elmex	1.1	/*
2	root	1.18	* CrossFire, A Multiplayer game
3			*
4	pippijn	1.15	* 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	root	1.18	*
8	pippijn	1.15	* 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	root	1.18	*
13	pippijn	1.15	* 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	root	1.18	*
18	pippijn	1.15	* 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	elmex	1.1
25			/* This file deals with range related commands (casting, shooting,
26			* throwing, etc.
27			*/
28
29			#include <global.h>
30	root	1.13	#include <sproto.h>
31	elmex	1.1	#include <spells.h>
32			#include <skills.h>
33			#include <commands.h>
34
35	root	1.5	int
36			command_invoke (object op, char params)
37	elmex	1.1	{
38	root	1.5	return command_cast_spell (op, params, 'i');
39	elmex	1.1	}
40
41	root	1.5	int
42			command_cast (object op, char params)
43	elmex	1.1	{
44	root	1.5	return command_cast_spell (op, params, 'c');
45	elmex	1.1	}
46
47	root	1.5	int
48			command_prepare (object op, char params)
49	elmex	1.1	{
50	root	1.5	return command_cast_spell (op, params, 'p');
51	elmex	1.1	}
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	root	1.5	static void
58			show_matching_spells (object op, char params)
59	elmex	1.1	{
60	root	1.5	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	root	1.2	}
86			}
87	elmex	1.1	}
88	root	1.5	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	root	1.16	qsort (spell_sort, num_found, MAX_BUF, (int ()(const void , const void *)) std::strcmp);
108	root	1.5	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	root	1.2	}
120	root	1.5	new_draw_info (NDI_UNIQUE, 0, op, strchr (spell_sort[i], ':') + 1);
121	root	1.2	}
122	elmex	1.1	}
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	root	1.5	int
131			command_cast_spell (object op, char params, char command)
132	elmex	1.1	{
133	root	1.5	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	root	1.18	if (object *golem = op->contr->ranges[range_golem])
142			golem->destroy ();
143	elmex	1.1
144	root	1.18	if (params)
145	root	1.5	{
146			int spellnumber = 0;
147
148			if ((spellnumber = atoi (params)))
149	root	1.9	for (spob = op->inv; spob && spob->count != spellnumber; spob = spob->below)
150	root	1.6	/* nop */;
151	root	1.5	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	root	1.2	}
169			}
170	root	1.5	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	root	1.2	}
178	root	1.5	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	root	1.6	cast_spell (op, op, op->facing, spob, cp);
189	root	1.5	else
190			{
191			op->contr->ranges[range_magic] = spob;
192			op->contr->shoottype = range_magic;
193	root	1.7	assign (op->contr->spellparam, cp ? cp : "");
194	root	1.5	new_draw_info_format (NDI_UNIQUE, 0, op, "You ready the spell %s", &spob->name);
195	root	1.2	}
196	root	1.6
197	root	1.5	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	elmex	1.1	}
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	root	1.5	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	root	1.10
226	root	1.2	case range_bow:
227			case range_misc:
228	root	1.5	case range_magic: /* cast spells */
229	root	1.10	return !!op->contr->ranges[r];
230	root	1.5
231			case range_golem: /* Use scrolls */
232	root	1.10	return !!op->contr->ranges[range_golem];
233	root	1.2
234			case range_skill:
235	root	1.10	return !!op->chosen_skill;
236	elmex	1.1	}
237	root	1.10
238	root	1.5	/* No match above, must not be valid */
239			return 0;
240	elmex	1.1	}
241
242	root	1.5	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	pippijn	1.17
255	root	1.5	/* 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	root	1.2	case range_none:
262	root	1.5	new_draw_info (NDI_UNIQUE, 0, op, "No ranged attack chosen.");
263			break;
264	root	1.2
265			case range_golem:
266	root	1.5	new_draw_info (NDI_UNIQUE, 0, op, "You regain control of your golem.");
267			break;
268	root	1.2
269			case range_bow:
270	root	1.5	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	root	1.2
274			case range_magic:
275	root	1.5	new_draw_info_format (NDI_UNIQUE, 0, op, "Switched to spells (%s).", &op->contr->ranges[range_magic]->name);
276			break;
277	root	1.2
278			case range_misc:
279	root	1.5	new_draw_info_format (NDI_UNIQUE, 0, op, "Switched to %s.", query_base_name (op->contr->ranges[range_misc], 0));
280			break;
281	root	1.2
282	root	1.5	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	elmex	1.1
286	root	1.2	default:
287	root	1.5	break;
288	elmex	1.1	}
289			}
290
291
292	root	1.5	int
293			command_rotateshoottype (object op, char params)
294	elmex	1.1	{
295			if (!params)
296	root	1.5	change_spell (op, '+');
297	elmex	1.1	else
298	root	1.5	change_spell (op, params[0]);
299	elmex	1.1	return 0;
300			}