mirror of
https://github.com/python/cpython.git
synced 2024-11-26 11:24:40 +08:00
7f14f0d8a0
svn+ssh://pythondev@svn.python.org/python/branches/py3k
................
r81032 | antoine.pitrou | 2010-05-09 17:52:27 +0200 (dim., 09 mai 2010) | 9 lines
Recorded merge of revisions 81029 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/trunk
........
r81029 | antoine.pitrou | 2010-05-09 16:46:46 +0200 (dim., 09 mai 2010) | 3 lines
Untabify C files. Will watch buildbots.
........
................
67 lines
1.0 KiB
C
67 lines
1.0 KiB
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++;
|
|
}
|