extern char *statement, *scanpos, *tokenstr;
extern t_token scantoken, prevtoken;
extern int tokenlen;
extern long constval;
extern char inputline[];
void parse_error(const char *errormsg);
void parse_warn(const char *warnmsg);
int next_line(void);
void scan_rewind(char *backptr);
int scan_lookahead(void);
t_token scan(void);
