https://github.com/python/cpython
- HEAD
- refs/heads/3.10
- refs/heads/3.6
- refs/heads/3.7
- refs/heads/3.8
- refs/heads/3.9
- refs/heads/buildbot-custom
- refs/heads/main
- refs/tags/v0.9.8
- refs/tags/v0.9.9
- refs/tags/v1.0.1
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- refs/tags/v1.1
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- refs/tags/v1.5
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- refs/tags/v3.9.0a1
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- v3.9.9
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- v3.9.4
- v3.9.3
- v3.9.2rc1
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- v3.9.0
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- v3.8.8rc1
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- v3.7.1rc2
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- v3.7.0rc1
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- v3.6.13
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- v3.6.11rc1
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- v3.6.1
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- v3.5.8rc2
- v3.5.8rc1
- v3.5.8
- v3.5.7rc1
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- v3.5.6rc1
- v3.5.6
- v3.5.5rc1
- v3.5.5
- v3.5.4rc1
- v3.5.4
- v3.5.10rc1
- v3.5.10
- v3.4.9rc1
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- v3.4.7rc1
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- v3.3.7rc1
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Tip revision: 50d55ff8c73f484708225d492a2167b82c8c8bb8 authored by Martin v. Löwis on 11 March 2008, 17:59:53 UTC
Prepare for 2.4.5
Prepare for 2.4.5
Tip revision: 50d55ff
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 = PyMem_NEW(BYTE, nbytes);
if (ss == NULL)
Py_FatalError("no mem for bitset");
ss += nbytes;
while (--nbytes >= 0)
*--ss = 0;
return ss;
}
void
delbitset(bitset ss)
{
PyMem_DEL(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++;
}