44 lines
563 B
C
44 lines
563 B
C
typedef enum
|
|
{
|
|
END = -1,
|
|
EMPTY = (1 << 8 ) ,
|
|
BACKREF,
|
|
BEGLINE,
|
|
ENDLINE,
|
|
BEGWORD,
|
|
ENDWORD,
|
|
LIMWORD,
|
|
NOTLIMWORD,
|
|
QMARK,
|
|
STAR,
|
|
PLUS,
|
|
REPMN,
|
|
CAT,
|
|
OR,
|
|
ORTOP,
|
|
LPAREN,
|
|
RPAREN,
|
|
CSET
|
|
} token;
|
|
|
|
static token tok;
|
|
|
|
static int
|
|
atom ()
|
|
{
|
|
if ((tok >= 0 && tok < (1 << 8 ) ) || tok >= CSET || tok == BACKREF
|
|
|| tok == BEGLINE || tok == ENDLINE || tok == BEGWORD
|
|
|| tok == ENDWORD || tok == LIMWORD || tok == NOTLIMWORD)
|
|
return 1;
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
main ()
|
|
{
|
|
tok = 0;
|
|
if (atom () != 1)
|
|
abort ();
|
|
exit (0);
|
|
}
|