Add into mob_db weapot type attacks modifier.

New group in mob_db: WeaponAttacks

Example:
    WeaponAttacks: {
        Bows: 5000     // mean bow attack do 50% of normal attack
    }

Default value is 10000 mean 100%

1 files changed, 59 insertions, 0 deletions

diff --git a/src/emap/battle.c b/src/emap/battle.c
index 5b16244..161da3d 100644
--- a/src/emap/battle.c
+++ b/src/emap/battle.c
@@ -8,12 +8,42 @@
 #include <string.h>
 
 #include "common/HPMi.h"
+#include "common/nullpo.h"
+#include "common/utils.h"
 
 #include "map/itemdb.h"
+#include "map/mob.h"
 #include "map/pc.h"
 
 #include "emap/data/itemd.h"
+#include "emap/data/mobd.h"
 #include "emap/struct/itemdext.h"
+#include "emap/struct/mobdext.h"
+
+// copy from common/utils.c
+/**
+ * Applies a percentual rate modifier.
+ *
+ * @param value The base value.
+ * @param rate  The rate modifier to apply.
+ * @param stdrate The rate modifier's divider (rate == stdrate => 100%).
+ * @return The modified value.
+ */
+int64 apply_percentrate64(int64 value, int rate, int stdrate)
+{
+    Assert_ret(stdrate > 0);
+    Assert_ret(rate >= 0);
+    if (rate == stdrate)
+        return value;
+    if (rate == 0)
+        return 0;
+    if (INT64_MAX / rate < value)
+    {
+        // Give up some precision to prevent overflows
+        return value / stdrate * rate;
+    }
+    return value * rate / stdrate;
+}
 
 bool ebattle_check_arrows_post(bool retVal,
                                struct map_session_data *sd)
@@ -52,3 +82,32 @@ bool ebattle_check_arrows_post(bool retVal,
     }
     return false;
 }
+
+struct Damage ebattle_calc_weapon_attack_post(struct Damage retVal,
+                                              struct block_list *src,
+                                              struct block_list *target __attribute__ ((unused)),
+                                              uint16 skill_id __attribute__ ((unused)),
+                                              uint16 skill_lv __attribute__ ((unused)),
+                                              int wflag __attribute__ ((unused)))
+{
+    if (src == NULL)
+        return retVal;
+
+    struct map_session_data *sd = BL_CAST(BL_PC, src);
+    if (sd == NULL)
+        return retVal;
+
+    struct mob_data *md = BL_CAST(BL_MOB, target);
+    if (md == NULL)
+        return retVal;
+
+    struct MobdExt *data = mobd_get_by_mob(md);
+    if (data == NULL)
+        return retVal;
+
+    const int mod = data->weaponAttacks[sd->weapontype1];
+    retVal.damage = apply_percentrate64(retVal.damage, mod, 10000);
+    retVal.damage2 = apply_percentrate64(retVal.damage2, mod, 10000);
+
+    return retVal;
+}