From 3534b428629be185e096be99e3bd5fdfe32d5544 Mon Sep 17 00:00:00 2001 From: Laurent Bercot Date: Thu, 18 Sep 2014 18:55:44 +0000 Subject: initial commit with rc for skalibs-2.0.0.0 --- src/libstddjb/bitarray_not.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) create mode 100644 src/libstddjb/bitarray_not.c (limited to 'src/libstddjb/bitarray_not.c') diff --git a/src/libstddjb/bitarray_not.c b/src/libstddjb/bitarray_not.c new file mode 100644 index 0000000..4bd95ad --- /dev/null +++ b/src/libstddjb/bitarray_not.c @@ -0,0 +1,18 @@ +/* ISC license. */ + +#include + +void bitarray_not (register unsigned char *s, register unsigned int a, register unsigned int b) +{ + if (!b) return ; + b += a ; + if ((a >> 3) == ((b-1) >> 3)) + s[a>>3] ^= ((1 << (a & 7)) - 1) ^ ((a << (b & 7)) - 1) ; + else + { + register unsigned int i = (a>>3) + 1 ; + s[a>>3] ^= ~((1 << (a & 7)) - 1) ; + for (; i < (b>>3) - 1 ; i++) s[i] = ~s[i] ; + s[b>>3] ^= (1 << (b & 7)) - 1 ; + } +} -- cgit v1.2.3