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#pragma once
// magic-expr.hpp - Pure functions for the old magic backend.
//
// Copyright © 2004-2011 The Mana World Development Team
// Copyright © 2011-2014 Ben Longbons <b.r.longbons@gmail.com>
//
// This file is part of The Mana World (Athena server)
//
// 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 3 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, see <http://www.gnu.org/licenses/>.
#include "fwd.hpp"
#include "../generic/fwd.hpp"
#include "../range/fwd.hpp"
#include "../strings/zstring.hpp"
#include "../strings/literal.hpp"
#include "../mmo/fwd.hpp"
#include "magic-interpreter.t.hpp"
namespace tmwa
{
/*
* Argument types:
* i : int
* d : dir
* s : string
* e : entity
* l : location
* a : area
* S : spell
* I : invocation
* . : any, except for fail/undef
* _ : any, including fail, but not undef
*/
struct fun_t
{
LString name;
LString signature;
char ret_ty;
int (*fun)(dumb_ptr<env_t> env, val_t *result, Slice<val_t> arga);
};
/**
* Retrieves a function by name
* @param name The name to look up
* @return A function of that name, or nullptr.
*/
fun_t *magic_get_fun(ZString name);
/**
* Evaluates an expression and stores the result in `dest'
*/
void magic_eval(dumb_ptr<env_t> env, val_t *dest, dumb_ptr<expr_t> expr);
/**
* Evaluates an expression and coerces the result into an integer
*/
int magic_eval_int(dumb_ptr<env_t> env, dumb_ptr<expr_t> expr);
/**
* Evaluates an expression and coerces the result into a string
*/
AString magic_eval_str(dumb_ptr<env_t> env, dumb_ptr<expr_t> expr);
dumb_ptr<expr_t> magic_new_expr(EXPR ty);
void magic_clear_var(val_t *v);
void magic_copy_var(val_t *dest, val_t *src);
void magic_random_location(location_t *dest, dumb_ptr<area_t> area);
// ret -1: not a string, ret 1: no such item, ret 0: OK
int magic_find_item(Slice<val_t> args, int index, Item *item, int *stackable);
#define GET_ARG_ITEM(index, dest, stackable) \
switch (magic_find_item(args, index, &dest, &stackable)) \
{ \
case -1: return 1; \
case 1: return 0; \
default: break; \
}
int magic_location_in_area(map_local *m, int x, int y, dumb_ptr<area_t> area);
/* Helper definitions for dealing with functions and operations */
int magic_signature_check(ZString opname, ZString funname, ZString signature,
Slice<val_t> args, int line, int column);
void magic_area_rect(map_local **m, int *x, int *y, int *width, int *height,
area_t& area);
} // namespace tmwa
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