(*

 * Hedgewars, a worms-like game

 * Copyright (c) 2006, 2007 Andrey Korotaev <unC0Rr@gmail.com>

 *

 * 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; version 2 of the License

 *

 * 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA

 *)

unit uAmmos;

interface

uses uConsts;

{$INCLUDE options.inc}

type PHHAmmo = ^THHAmmo;

     THHAmmo = array[0..cMaxSlotIndex, 0..cMaxSlotAmmoIndex] of TAmmo;

procedure AddAmmoStore(s: shortstring);

procedure AssignStores;

procedure AddAmmo(Hedgehog: pointer; ammo: TAmmoType);

function  HHHasAmmo(Hedgehog: pointer; Ammo: TAmmoType): boolean;

procedure PackAmmo(Ammo: PHHAmmo; Slot: LongInt);

procedure OnUsedAmmo(Ammo: PHHAmmo);

implementation

uses uMisc, uTeams, uGears;

type TAmmoCounts = array[TAmmoType] of Longword;

var StoresList: array[0..Pred(cMaxHHs)] of PHHAmmo;

    StoreCnt: Longword = 0;

procedure FillAmmoStore(Ammo: PHHAmmo; var cnts: TAmmoCounts);

var mi: array[0..cMaxSlotIndex] of byte;

    a: TAmmoType;

begin

FillChar(mi, sizeof(mi), 0);

FillChar(Ammo^, sizeof(Ammo^), 0);

for a:= Low(TAmmoType) to High(TAmmoType) do

    if cnts[a] > 0 then

       begin

       TryDo(mi[Ammoz[a].Slot] <= cMaxSlotAmmoIndex, 'Ammo slot overflow', true);

       Ammo^[Ammoz[a].Slot, mi[Ammoz[a].Slot]]:= Ammoz[a].Ammo;

       Ammo^[Ammoz[a].Slot, mi[Ammoz[a].Slot]].Count:= cnts[a];

       inc(mi[Ammoz[a].Slot])

       end

end;

procedure AddAmmoStore(s: shortstring);

var cnt: Longword;

    a: TAmmoType;

    ammos: TAmmoCounts;

begin

TryDo(byte(s[0]) = byte(ord(High(TAmmoType)) + 1), 'Invalid ammo scheme (incompatible frontend)', true);

inc(StoreCnt);

TryDo(StoreCnt <= cMaxHHs, 'Ammo stores overflow', true);

new(StoresList[Pred(StoreCnt)]);

for a:= Low(TAmmoType) to High(TAmmoType) do

    begin

    cnt:= byte(s[ord(a) + 1]) - byte('0');

    if cnt = 9 then cnt:= AMMO_INFINITE;

    ammos[a]:= cnt

    end;

FillAmmoStore(StoresList[Pred(StoreCnt)], ammos)

end;

function GetAmmoByNum(num: Longword): PHHAmmo;

begin

TryDo(num < StoreCnt, 'Invalid store number', true);

exit(StoresList[num])

end;

procedure AssignStores;

var tteam: PTeam;

    i: Longword;

begin

tteam:= TeamsList;

while tteam <> nil do

      begin

      for i:= 0 to cMaxHHIndex do

          if tteam^.Hedgehogs[i].Gear <> nil then

             tteam^.Hedgehogs[i].Ammo:= GetAmmoByNum(tteam^.Hedgehogs[i].AmmoStore);

      tteam:= tteam^.Next

      end

end;

procedure AddAmmo(Hedgehog: pointer; ammo: TAmmoType);

var ammos: TAmmoCounts;

    slot, ami: LongInt;

    hhammo: PHHAmmo;

begin

FillChar(ammos, sizeof(ammos), 0);

hhammo:= PHedgehog(Hedgehog)^.Ammo;

for slot:= 0 to cMaxSlotIndex do

    for ami:= 0 to cMaxSlotAmmoIndex do

        if hhammo^[slot, ami].Count > 0 then

           ammos[hhammo^[slot, ami].AmmoType]:= hhammo^[slot, ami].Count;

FillAmmoStore(hhammo, ammos)

end;

procedure PackAmmo(Ammo: PHHAmmo; Slot: LongInt);

var ami: LongInt;

    b: boolean;

begin

    repeat

      b:= false;

      ami:= 0;

      while (not b) and (ami < cMaxSlotAmmoIndex) do

          if (Ammo^[Slot, ami].Count = 0)

             and (Ammo^[Slot, ami + 1].Count > 0) then b:= true

                                                 else inc(ami);

      if b then // there's a free item in ammo stack

         begin

         Ammo^[Slot, ami]:= Ammo^[Slot, ami + 1];

         Ammo^[Slot, ami + 1].Count:= 0

         end;

    until not b;

end;

procedure OnUsedAmmo(Ammo: PHHAmmo);

var s, a: Longword;

begin

with CurrentTeam^.Hedgehogs[CurrentTeam^.CurrHedgehog] do

     begin

     if CurAmmoGear = nil then begin s:= CurSlot; a:= CurAmmo end

                          else begin s:= AltSlot; a:= AltAmmo end;

     with Ammo^[s, a] do

          if Count <> AMMO_INFINITE then

             begin

             dec(Count);

             if Count = 0 then PackAmmo(Ammo, CurSlot)

             end

     end

end;

function  HHHasAmmo(Hedgehog: pointer; Ammo: TAmmoType): boolean;

var slot, ami: LongInt;

begin

Slot:= Ammoz[Ammo].Slot;

ami:= 0;

while (ami <= cMaxSlotAmmoIndex) do

      begin

      with PHedgehog(Hedgehog)^.Ammo^[Slot, ami] do

            if (AmmoType = Ammo) and (Count > 0) then exit(true);

      inc(ami)

      end;

HHHasAmmo:= false

end;

end.