/* Bitset primitives used by the parser generator */ #include "pgenheaders.h"#include "bitset.h" bitsetnewbitset(int nbits){	int nbytes = NBYTES(nbits);	bitset ss = (char *)PyObject_MALLOC(sizeof(BYTE) *  nbytes);		if (ss == NULL)		Py_FatalError("no mem for bitset");		ss += nbytes;	while (--nbytes >= 0)		*--ss = 0;	return ss;} voiddelbitset(bitset ss){	PyObject_FREE(ss);} intaddbit(bitset ss, int ibit){	int ibyte = BIT2BYTE(ibit);	BYTE mask = BIT2MASK(ibit);		if (ss[ibyte] & mask)		return 0; /* Bit already set */	ss[ibyte] |= mask;	return 1;} #if 0 /* Now a macro */inttestbit(bitset ss, int ibit){	return (ss[BIT2BYTE(ibit)] & BIT2MASK(ibit)) != 0;}#endif intsamebitset(bitset ss1, bitset ss2, int nbits){	int i;		for (i = NBYTES(nbits); --i >= 0; )		if (*ss1++ != *ss2++)			return 0;	return 1;} voidmergebitset(bitset ss1, bitset ss2, int nbits){	int i;		for (i = NBYTES(nbits); --i >= 0; )		*ss1++ |= *ss2++;}