Staging
v0.8.1
v0.8.1
Revision 420cca92e8b1b5b9bd2b9a58a93d4e8f0ff86d1d authored by Georg Brandl on 26 November 2010, 07:21:01 UTC, committed by Georg Brandl on 26 November 2010, 07:21:01 UTC
svn+ssh://pythondev@svn.python.org/python/branches/py3k ........ r85253 | georg.brandl | 2010-10-06 10:52:48 +0200 (Mi, 06 Okt 2010) | 1 line Copyedit of os.symlink() docs. ........ r85452 | georg.brandl | 2010-10-14 08:43:22 +0200 (Do, 14 Okt 2010) | 1 line #10046: small correction to atexit docs. ........ r85453 | georg.brandl | 2010-10-14 08:46:08 +0200 (Do, 14 Okt 2010) | 1 line #6825: small correction to split() docs. ........ r85454 | georg.brandl | 2010-10-14 08:48:47 +0200 (Do, 14 Okt 2010) | 1 line Mention 2to3. ........
1 parent c39da79
bitset.c
/* Bitset primitives used by the parser generator */
#include "pgenheaders.h"
#include "bitset.h"
bitset
newbitset(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;
}
void
delbitset(bitset ss)
{
PyObject_FREE(ss);
}
int
addbit(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 */
int
testbit(bitset ss, int ibit)
{
return (ss[BIT2BYTE(ibit)] & BIT2MASK(ibit)) != 0;
}
#endif
int
samebitset(bitset ss1, bitset ss2, int nbits)
{
int i;
for (i = NBYTES(nbits); --i >= 0; )
if (*ss1++ != *ss2++)
return 0;
return 1;
}
void
mergebitset(bitset ss1, bitset ss2, int nbits)
{
int i;
for (i = NBYTES(nbits); --i >= 0; )
*ss1++ |= *ss2++;
}
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