| author |  Andrew Kelley <andrew@ziglang.org> 2023-05-10 20:43:54-07:00 |
| committer | Andrew Kelley <andrew@ziglang.org> 2023-06-10 20:42:30-07:00 |
| log | 1c7095cb7dfcba3537edf3624a61046c9b772b1f |
| tree | 36cb95ee1af69f6fe7aeb218ac69ed5c3f6ebe19 |
| parent | 3ba099bfba9d3c38fe188010aa82fc589b1cabf6 |
add std.hash.uint32
This is handy if you have a u32 and want a u32 and don't want to take a
detour through many layers of abstraction elsewhere in the std.hash
namespace.
Copied from https://nullprogram.com/blog/2018/07/31/1 files changed, 14 insertions(+), 0 deletions(-)
lib
std
lib/std/hash.zig+14
| ... | ... | @@ -36,6 +36,20 @@ const xxhash = @import("hash/xxhash.zig"); |
| 36 | 36 | pub const XxHash64 = xxhash.XxHash64; |
| 37 | 37 | pub const XxHash32 = xxhash.XxHash32; |
| 38 | 38 | |
| 39 | /// This is handy if you have a u32 and want a u32 and don't want to take a | |
| 40 | /// detour through many layers of abstraction elsewhere in the std.hash | |
| 41 | /// namespace. | |
| 42 | /// Copied from https://nullprogram.com/blog/2018/07/31/ | |
| 43 | pub fn uint32(input: u32) u32 { | |
| 44 | var x: u32 = input; | |
| 45 | x ^= x >> 16; | |
| 46 | x *%= 0x7feb352d; | |
| 47 | x ^= x >> 15; | |
| 48 | x *%= 0x846ca68b; | |
| 49 | x ^= x >> 16; | |
| 50 | return x; | |
| 51 | } | |
| 52 | ||
| 39 | 53 | test { |
| 40 | 54 | _ = adler; |
| 41 | 55 | _ = auto_hash; |