add hg and python

1 files changed, 32 insertions, 0 deletions

diff --git a/sys/src/cmd/python/Include/bitset.h b/sys/src/cmd/python/Include/bitset.h
new file mode 100644
index 000000000..faeb41913
--- /dev/null
+++ b/sys/src/cmd/python/Include/bitset.h
@@ -0,0 +1,32 @@
+
+#ifndef Py_BITSET_H
+#define Py_BITSET_H
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Bitset interface */
+
+#define BYTE		char
+
+typedef BYTE *bitset;
+
+bitset newbitset(int nbits);
+void delbitset(bitset bs);
+#define testbit(ss, ibit) (((ss)[BIT2BYTE(ibit)] & BIT2MASK(ibit)) != 0)
+int addbit(bitset bs, int ibit); /* Returns 0 if already set */
+int samebitset(bitset bs1, bitset bs2, int nbits);
+void mergebitset(bitset bs1, bitset bs2, int nbits);
+
+#define BITSPERBYTE	(8*sizeof(BYTE))
+#define NBYTES(nbits)	(((nbits) + BITSPERBYTE - 1) / BITSPERBYTE)
+
+#define BIT2BYTE(ibit)	((ibit) / BITSPERBYTE)
+#define BIT2SHIFT(ibit)	((ibit) % BITSPERBYTE)
+#define BIT2MASK(ibit)	(1 << BIT2SHIFT(ibit))
+#define BYTE2BIT(ibyte)	((ibyte) * BITSPERBYTE)
+
+#ifdef __cplusplus
+}
+#endif
+#endif /* !Py_BITSET_H */