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#ifndef MAGIC_EXPR_HPP
#define MAGIC_EXPR_HPP
#include "magic-interpreter.hpp"
#include "../strings/fwd.hpp"
#include "../strings/zstring.hpp"
/*
* 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
{
ZString name;
ZString signature;
char ret_ty;
int (*fun)(dumb_ptr<env_t> env, val_t *result, const_array<val_t> arga);
};
struct op_t
{
ZString name;
ZString signature;
int (*op)(dumb_ptr<env_t> env, const_array<val_t> arga);
};
/**
* Retrieves a function by name
* @param name The name to look up
* @return A function of that name, or NULL.
*/
fun_t *magic_get_fun(ZString name);
/**
* Retrieves an operation by name
* @param name The name to look up
* @return An operation of that name, or NULL, and a function index
*/
op_t *magic_get_op(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
*/
FString 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(const_array<val_t> args, int index, struct 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);
#endif // MAGIC_EXPR_HPP
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