#define istoken(c) (!isspace (c) && !iscntrl (c) && (c) != '(' \
&& (c) != ')' && (c) != '<' && (c) != '>' \
&& (c) != '@' && (c) != ',' && (c) != ';' \
#define istoken(c) (!isspace (c) && !iscntrl (c) && (c) != '(' \
&& (c) != ')' && (c) != '<' && (c) != '>' \
&& (c) != '@' && (c) != ',' && (c) != ';' \