Slightly reduce religion.cc by yanking item-handling stuff to goditem.cc

1 files changed, 561 insertions, 0 deletions

diff --git a/crawl-ref/source/goditem.cc b/crawl-ref/source/goditem.cc
new file mode 100644
index 0000000000..be63717a01
--- /dev/null
+++ b/crawl-ref/source/goditem.cc
@@ -0,0 +1,561 @@
+/*
+ *  File:       goditem.cc
+ *  Summary:    Gods' attitude towards items.
+ */
+
+#include "AppHdr.h"
+
+#include "religion.h"
+#include "goditem.h"
+
+#include <algorithm>
+#include <sstream>
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+#include <cmath>
+
+#include "externs.h"
+
+
+bool is_holy_item(const item_def& item)
+{
+    bool retval = false;
+
+    if (is_unrandom_artefact(item))
+    {
+        unrandart_entry* entry = get_unrand_entry(item.special);
+
+        if (entry->flags & UNRAND_FLAG_HOLY)
+            return (true);
+    }
+
+    switch (item.base_type)
+    {
+    case OBJ_WEAPONS:
+        retval = (is_blessed_blade(item)
+                  || get_weapon_brand(item) == SPWPN_HOLY_WRATH);
+        break;
+    case OBJ_SCROLLS:
+        retval = (item.sub_type == SCR_HOLY_WORD);
+        break;
+    case OBJ_BOOKS:
+        retval = is_holy_spellbook(item);
+        break;
+    case OBJ_STAVES:
+        retval = is_holy_rod(item);
+        break;
+    default:
+        break;
+    }
+
+    return (retval);
+}
+
+bool is_evil_item(const item_def& item)
+{
+    bool retval = false;
+
+    if (is_unrandom_artefact(item))
+    {
+        unrandart_entry* entry = get_unrand_entry(item.special);
+
+        if (entry->flags & UNRAND_FLAG_EVIL)
+            return (true);
+    }
+
+    switch (item.base_type)
+    {
+    case OBJ_WEAPONS:
+        {
+        const int item_brand = get_weapon_brand(item);
+
+        retval = (is_demonic(item)
+                  || item_brand == SPWPN_DRAINING
+                  || item_brand == SPWPN_PAIN
+                  || item_brand == SPWPN_VAMPIRICISM
+                  || item_brand == SPWPN_SHADOW);
+        }
+        break;
+    case OBJ_MISSILES:
+    {
+        const int item_brand = get_ammo_brand(item);
+        retval = is_demonic(item) || item_brand == SPMSL_SHADOW;
+        break;
+    }
+    case OBJ_WANDS:
+        retval = (item.sub_type == WAND_DRAINING);
+        break;
+    case OBJ_SCROLLS:
+        retval = (item.sub_type == SCR_SUMMONING
+                  || item.sub_type == SCR_TORMENT);
+        break;
+    case OBJ_POTIONS:
+        retval = is_blood_potion(item);
+        break;
+    case OBJ_BOOKS:
+        retval = is_evil_spellbook(item);
+        break;
+    case OBJ_STAVES:
+        retval = (item.sub_type == STAFF_DEATH || is_evil_rod(item));
+        break;
+    case OBJ_MISCELLANY:
+        retval = (item.sub_type == MISC_BOTTLED_EFREET
+                  || item.sub_type == MISC_LANTERN_OF_SHADOWS);
+        break;
+    default:
+        break;
+    }
+
+    return (retval);
+}
+
+bool is_chaotic_item(const item_def& item)
+{
+    bool retval = false;
+
+    if (is_unrandom_artefact(item))
+    {
+        unrandart_entry* entry = get_unrand_entry(item.special);
+
+        if (entry->flags & UNRAND_FLAG_CHAOTIC)
+            return (true);
+    }
+
+    switch (item.base_type)
+    {
+    case OBJ_WEAPONS:
+        {
+        const int item_brand = get_weapon_brand(item);
+        retval = (item_brand == SPWPN_CHAOS);
+        }
+        break;
+    case OBJ_MISSILES:
+        {
+        const int item_brand = get_ammo_brand(item);
+        retval = (item_brand == SPMSL_CHAOS);
+        }
+        break;
+    case OBJ_WANDS:
+        retval = (item.sub_type == WAND_POLYMORPH_OTHER);
+        break;
+    case OBJ_POTIONS:
+        retval = (item.sub_type == POT_MUTATION);
+        break;
+    case OBJ_BOOKS:
+        retval = is_chaotic_spellbook(item);
+        break;
+    case OBJ_STAVES:
+        retval = is_chaotic_rod(item);
+        break;
+    default:
+        break;
+    }
+
+    if (is_artefact(item) && artefact_wpn_property(item, ARTP_MUTAGENIC))
+        retval = true;
+
+    return (retval);
+}
+
+bool is_hasty_item(const item_def& item)
+{
+    switch (item.base_type)
+    {
+    case OBJ_WEAPONS:
+        {
+        const int item_brand = get_weapon_brand(item);
+        if (item_brand == SPWPN_SPEED)
+            return (true);
+        }
+        break;
+    case OBJ_ARMOUR:
+        {
+        const int item_brand = get_armour_ego_type(item);
+        if (item_brand == SPARM_RUNNING)
+            return (true);
+        }
+        break;
+    case OBJ_WANDS:
+        if (item.sub_type == WAND_HASTING)
+            return (true);
+        break;
+    case OBJ_POTIONS:
+        if (item.sub_type == POT_SPEED || item.sub_type == POT_BERSERK_RAGE)
+            return (true);
+        break;
+    case OBJ_JEWELLERY:
+        // should this include AMU_RESIST_SLOWING?
+        if (item.sub_type == AMU_RAGE)
+            return (true);
+        break;
+    default:
+        break;
+    }
+    return (false);
+}
+
+bool is_holy_discipline(int discipline)
+{
+    return (discipline & SPTYP_HOLY);
+}
+
+bool is_evil_discipline(int discipline)
+{
+    return (discipline & SPTYP_NECROMANCY);
+}
+
+bool is_holy_spell(spell_type spell, god_type god)
+{
+    UNUSED(god);
+
+    unsigned int disciplines = get_spell_disciplines(spell);
+
+    return (is_holy_discipline(disciplines));
+}
+
+bool is_evil_spell(spell_type spell, god_type god)
+{
+    UNUSED(god);
+
+    unsigned int flags       = get_spell_flags(spell);
+    unsigned int disciplines = get_spell_disciplines(spell);
+
+    return ((flags & SPFLAG_UNHOLY) || (is_evil_discipline(disciplines)));
+}
+
+bool is_chaotic_spell(spell_type spell, god_type god)
+{
+    UNUSED(god);
+
+    return (spell == SPELL_POLYMORPH_OTHER
+            || spell == SPELL_ALTER_SELF
+            || spell == SPELL_SUMMON_UGLY_THING);
+}
+
+bool is_hasty_spell(spell_type spell, god_type god)
+{
+    UNUSED(god);
+
+    return (spell == SPELL_HASTE
+            || spell == SPELL_SWIFTNESS
+            || spell == SPELL_BERSERKER_RAGE);
+}
+
+// The default suitable() function for is_spellbook_type().
+bool is_any_spell(spell_type spell, god_type god)
+{
+    UNUSED(god);
+
+    return (true);
+}
+
+// If book_or_rod is false, only look at actual spellbooks.  Otherwise,
+// only look at rods.
+bool is_spellbook_type(const item_def& item, bool book_or_rod,
+                       bool (*suitable)(spell_type spell, god_type god),
+                       god_type god)
+{
+    const bool is_spellbook = (item.base_type == OBJ_BOOKS
+                                  && item.sub_type != BOOK_MANUAL
+                                  && item.sub_type != BOOK_DESTRUCTION);
+    const bool is_rod = item_is_rod(item);
+
+    if (!is_spellbook && !is_rod)
+        return (false);
+
+    if (!book_or_rod && is_rod)
+        return (false);
+
+    int total       = 0;
+    int total_liked = 0;
+
+    for (int i = 0; i < SPELLBOOK_SIZE; ++i)
+    {
+        spell_type spell = which_spell_in_book(item, i);
+        if (spell == SPELL_NO_SPELL)
+            continue;
+
+        total++;
+        if (suitable(spell, god))
+            total_liked++;
+    }
+
+    // If at least half of the available spells are suitable, the whole
+    // spellbook or rod is, too.
+    return (total_liked >= (total / 2) + 1);
+}
+
+bool is_holy_spellbook(const item_def& item)
+{
+    return (is_spellbook_type(item, false, is_holy_spell));
+}
+
+bool is_evil_spellbook(const item_def& item)
+{
+    return (is_spellbook_type(item, false, is_evil_spell));
+}
+
+bool is_chaotic_spellbook(const item_def& item)
+{
+    return (is_spellbook_type(item, false, is_chaotic_spell));
+}
+
+bool god_hates_spellbook(const item_def& item)
+{
+    return (is_spellbook_type(item, false, god_hates_spell_type));
+}
+
+bool is_holy_rod(const item_def& item)
+{
+    return (is_spellbook_type(item, true, is_holy_spell));
+}
+
+bool is_evil_rod(const item_def& item)
+{
+    return (is_spellbook_type(item, true, is_evil_spell));
+}
+
+bool is_chaotic_rod(const item_def& item)
+{
+    return (is_spellbook_type(item, true, is_chaotic_spell));
+}
+
+bool god_hates_rod(const item_def& item)
+{
+    return (is_spellbook_type(item, true, god_hates_spell_type));
+}
+
+conduct_type good_god_hates_item_handling(const item_def &item)
+{
+    if (!is_good_god(you.religion) || !is_evil_item(item))
+        return (DID_NOTHING);
+
+    if (is_demonic(item))
+        return (DID_UNHOLY);
+
+    if (item_type_known(item)
+        || item.base_type == OBJ_WEAPONS
+            && get_weapon_brand(item) == SPWPN_CHAOS)
+    {
+        return (DID_NECROMANCY);
+    }
+
+    return (DID_NOTHING);
+}
+
+conduct_type god_hates_item_handling(const item_def &item)
+{
+    switch (you.religion)
+    {
+    case GOD_ZIN:
+        if (item_type_known(item) && is_chaotic_item(item))
+            return (DID_CHAOS);
+        break;
+
+    case GOD_FEAWN:
+        if (!item_type_known(item))
+            return (DID_NOTHING);
+
+        if (is_evil_item(item)
+            || item.base_type == OBJ_WEAPONS
+                && get_weapon_brand(item) == SPWPN_CHAOS)
+        {
+            return (DID_NECROMANCY);
+        }
+        break;
+
+    case GOD_SHINING_ONE:
+    {
+        if (!item_type_known(item))
+            return (DID_NOTHING);
+
+        switch (item.base_type)
+        {
+        case OBJ_WEAPONS:
+        {
+            const int item_brand = get_weapon_brand(item);
+            if (item_brand == SPWPN_VENOM)
+                return (DID_POISON);
+            break;
+        }
+
+        case OBJ_MISSILES:
+        {
+            const int item_brand = get_ammo_brand(item);
+            if (item_brand == SPMSL_POISONED || item_brand == SPMSL_CURARE)
+                return (DID_POISON);
+            break;
+        }
+
+        case OBJ_STAVES:
+            if (item.sub_type == STAFF_POISON)
+                return (DID_POISON);
+            break;
+
+        default:
+            break;
+        }
+        break;
+    }
+
+    case GOD_YREDELEMNUL:
+        if (item_type_known(item) && is_holy_item(item))
+            return (DID_HOLY);
+        break;
+
+    case GOD_TROG:
+        if (item.base_type == OBJ_BOOKS
+            && item.sub_type != BOOK_MANUAL
+            && item.sub_type != BOOK_DESTRUCTION)
+        {
+            return (DID_SPELL_MEMORISE);
+        }
+        break;
+
+    case GOD_CHRONOS:
+        if (item_type_known(item) && is_hasty_item(item))
+            return (DID_HASTY);
+        break;
+
+    default:
+        break;
+    }
+
+    if (item_type_known(item)
+        && (god_hates_spellbook(item) || god_hates_rod(item)))
+    {
+        return (NUM_CONDUCTS); // FIXME: get the specific reason, if it
+    }                          // will ever be needed for spellbooks.
+
+    return (DID_NOTHING);
+}
+
+bool god_hates_spell_type(spell_type spell, god_type god)
+{
+    if (is_good_god(god) && is_evil_spell(spell))
+        return (true);
+
+    unsigned int disciplines = get_spell_disciplines(spell);
+
+    switch (god)
+    {
+    case GOD_ZIN:
+        if (is_chaotic_spell(spell))
+            return (true);
+        break;
+
+    case GOD_SHINING_ONE:
+        // TSO hates using poison, but is fine with curing it, resisting
+        // it, or destroying it.
+        if ((disciplines & SPTYP_POISON) && spell != SPELL_CURE_POISON
+            && spell != SPELL_RESIST_POISON && spell != SPELL_IGNITE_POISON)
+        {
+            return (true);
+        }
+
+    case GOD_YREDELEMNUL:
+        if (is_holy_spell(spell))
+            return (true);
+        break;
+
+    case GOD_CHRONOS:
+        if (is_hasty_spell(spell))
+            return (true);
+        break;
+
+    default:
+        break;
+    }
+
+    return (false);
+}
+
+bool god_dislikes_spell_type(spell_type spell, god_type god)
+{
+    if (god_hates_spell_type(spell, god))
+        return (true);
+
+    unsigned int flags       = get_spell_flags(spell);
+    unsigned int disciplines = get_spell_disciplines(spell);
+
+    switch (god)
+    {
+    case GOD_SHINING_ONE:
+        // TSO probably wouldn't like spells which would put enemies
+        // into a state where attacking them would be unchivalrous.
+        if (spell == SPELL_CAUSE_FEAR || spell == SPELL_PARALYSE
+            || spell == SPELL_CONFUSE || spell == SPELL_MASS_CONFUSION
+            || spell == SPELL_SLEEP   || spell == SPELL_MASS_SLEEP)
+        {
+            return (true);
+        }
+        break;
+
+    case GOD_XOM:
+        // Ideally, Xom would only like spells which have a random effect,
+        // are risky to use, or would otherwise amuse him, but that would
+        // be a really small number of spells.
+
+        // Xom would probably find these extra boring.
+        if (flags & (SPFLAG_HELPFUL | SPFLAG_NEUTRAL | SPFLAG_ESCAPE
+                     | SPFLAG_RECOVERY | SPFLAG_MAPPING))
+        {
+            return (true);
+        }
+
+        // Things are more fun for Xom the less the player knows in
+        // advance.
+        if (disciplines & SPTYP_DIVINATION)
+            return (true);
+
+        // Holy spells are probably too useful for Xom to find them
+        // interesting.
+        if (disciplines & SPTYP_HOLY)
+            return (true);
+        break;
+
+    case GOD_ELYVILON:
+        // A peaceful god of healing wouldn't like combat spells.
+        if (disciplines & SPTYP_CONJURATION)
+            return (true);
+
+        // Also doesn't like battle spells of the non-conjuration type.
+        if (flags & SPFLAG_BATTLE)
+            return (true);
+        break;
+
+    default:
+        break;
+    }
+
+    return (false);
+}
+
+bool god_dislikes_spell_discipline(int discipline, god_type god)
+{
+    ASSERT(discipline < (1 << (SPTYP_LAST_EXPONENT + 1)));
+
+    if (is_good_god(god) && is_evil_discipline(discipline))
+        return (true);
+
+    switch (god)
+    {
+    case GOD_SHINING_ONE:
+        return (discipline & SPTYP_POISON);
+
+    case GOD_YREDELEMNUL:
+        return (discipline & SPTYP_HOLY);
+
+    case GOD_XOM:
+        return (discipline & (SPTYP_DIVINATION | SPTYP_HOLY));
+
+    case GOD_ELYVILON:
+        return (discipline & (SPTYP_CONJURATION | SPTYP_SUMMONING));
+
+    default:
+        break;
+    }
+
+    return (false);
+}