/* Gain a random spell from the given book (for priests) */
void do_cmd_study_book(cmd_code code, cmd_arg args[])
{
int book = args[0].item;
object_type *o_ptr = object_from_item_idx(book);
int spell = -1;
int i, k = 0;
cptr p = ((cp_ptr->spell_book == TV_MAGIC_BOOK) ? "spell" : "prayer");
/* Check the player can study at all atm */
if (!player_can_study())
return;
/* Check that the player has access to the nominated spell book. */
if (!item_is_available(book, obj_can_browse, (USE_INVEN | USE_FLOOR)))
{
msg_format("That item is not within your reach.");
return;
}
/* Extract spells */
for (i = 0; i < SPELLS_PER_BOOK; i++)
{
int s = get_spell_index(o_ptr, i);
/* Skip non-OK spells */
if (s == -1) continue;
if (!spell_okay_to_study(s)) continue;
/* Apply the randomizer */
if ((++k > 1) && (randint0(k) != 0)) continue;
/* Track it */
spell = s;
}
if (spell < 0)
{
msg_format("You cannot learn any %ss in that book.", p);
}
else
{
spell_learn(spell);
p_ptr->energy_use = 100;
}
}
/* Gain a random spell from the given book (for priests) */
void do_cmd_study_book(cmd_code code, cmd_arg args[])
{
int book = args[0].item;
object_type *o_ptr = object_from_item_idx(book);
int spell = -1;
struct spell *sp;
int k = 0;
const char *p = ((cp_ptr->spell_book == TV_MAGIC_BOOK) ? "spell" : "prayer");
/* Check the player can study at all atm */
if (!player_can_study())
return;
/* Check that the player has access to the nominated spell book. */
if (!item_is_available(book, obj_can_browse, (USE_INVEN | USE_FLOOR)))
{
msg("That item is not within your reach.");
return;
}
/* Extract spells */
for (sp = o_ptr->kind->spells; sp; sp = sp->next) {
if (!spell_okay_to_study(sp->spell_index))
continue;
if ((++k > 1) && (randint0(k) != 0))
continue;
spell = sp->spell_index;
}
if (spell < 0)
{
msg("You cannot learn any %ss in that book.", p);
}
else
{
spell_learn(spell);
p_ptr->energy_use = 100;
}
}
/* Gain a specific spell, specified by spell number (for mages). */
void do_cmd_study_spell(cmd_code code, cmd_arg args[])
{
int spell = args[0].choice;
int item_list[INVEN_TOTAL + MAX_FLOOR_STACK];
int item_num;
int i;
/* Check the player can study at all atm */
if (!player_can_study())
return;
/* Check that the player can actually learn the nominated spell. */
item_tester_hook = obj_can_browse;
item_num = scan_items(item_list, N_ELEMENTS(item_list), (USE_INVEN | USE_FLOOR));
/* Check through all available books */
for (i = 0; i < item_num; i++)
{
if (spell_in_book(spell, item_list[i]))
{
if (spell_okay_to_study(spell))
{
/* Spell is in an available book, and player is capable. */
spell_learn(spell);
p_ptr->energy_use = 100;
}
else
{
/* Spell is present, but player incapable. */
msg("You cannot learn that spell.");
}
return;
}
}
}
