Display the source code in core/bitop.d from which this page was generated on github.

If you spot a problem with this page, click here to create a Bugzilla issue.

Quickly fork, edit online, and submit a pull request for this page. Requires a signed-in GitHub account. This works well for small changes. If you'd like to make larger changes you may want to consider using local clone.

Function `core.bitop.bts`

Tests and sets the bit.


						
				int bts
				(
				

				  ulong* p,
				

				  ulong bitnum
				

				) pure nothrow @nogc;

Parameters

Name	Description
p	a non-NULL pointer to an array of size_ts.
bitnum	a bit number, starting with bit 0 of p[0], and progressing. It addresses bits like the expression: --- p[index / (size_t.sizeof8)] & (1 << (index & ((size_t.sizeof8) - 1))) ---

Returns

A non-zero value if the bit was set, and a zero if it was clear.

Example

size_t[2] array;

array[0] = 2;
array[1] = 0x100;

writeln(btc(array.ptr, 35)); // 0
if (size_t.sizeof == 8)
{
    writeln(array[0]); // 0x8_0000_0002
    writeln(array[1]); // 0x100
}
else
{
    writeln(array[0]); // 2
    writeln(array[1]); // 0x108
}

assert(btc(array.ptr, 35));
writeln(array[0]); // 2
writeln(array[1]); // 0x100

writeln(bts(array.ptr, 35)); // 0
if (size_t.sizeof == 8)
{
    writeln(array[0]); // 0x8_0000_0002
    writeln(array[1]); // 0x100
}
else
{
    writeln(array[0]); // 2
    writeln(array[1]); // 0x108
}

assert(btr(array.ptr, 35));
writeln(array[0]); // 2
writeln(array[1]); // 0x100

Authors

Don Clugston, Sean Kelly, Walter Bright, Alex Rønne Petersen, Thomas Stuart Bockman

License

Boost License 1.0