/* Declarations for built-in function stuff. */

#ifndef FUNCS_H
#define FUNCS_H

/*************************************************************************/

/* Return the ID number for a given function name, or -1 if no such
 * function exists. */
extern int func_id(const char *name);

/* Return the type of a given function. */
extern int func_type(int id);

/* Return the minimum number of arguments needed by a given function. */
extern int func_minargs(int id);

/* Return the maximum number of arguments needed by a given function. */
extern int func_maxargs(int id);

/* Return the required type of the `arg'th argument, or -1 if there is
 * either no such argument or no required type for that argument. */
extern int func_argtype(int id, int arg);

/* Return the value of a function.  The number and types of arguments are
 * assumed to be correct. */
extern ETree *func_eval(int id, ETree **args);

/*************************************************************************/

#endif	/* FUNCS_H */