SET1               26 ext/ereg/regex/regexec.c #define	SET1(v, n)	((v) |= (unsigned)1 << (n))
SET1               52 ext/ereg/regex/regexec.c #undef	SET1
SET1               73 ext/ereg/regex/regexec.c #define	SET1(v, n)	((v)[n] = 1)