Function hashWithSeed [src]

Prototype

pub fn hashWithSeed(str: []const u8, seed: u32) u32

Parameters

str: []const u8seed: u32

Source

pub fn hashWithSeed(str: []const u8, seed: u32) u32 { const m: u32 = 0x5bd1e995; const len: u32 = @truncate(str.len); var h1: u32 = seed ^ len; for (@as([*]align(1) const u32, @ptrCast(str.ptr))[0..(len >> 2)]) |v| { var k1: u32 = v; if (native_endian == .big) k1 = @byteSwap(k1); k1 *%= m; k1 ^= k1 >> 24; k1 *%= m; h1 *%= m; h1 ^= k1; } const offset = len & 0xfffffffc; const rest = len & 3; if (rest >= 3) { h1 ^= @as(u32, @intCast(str[offset + 2])) << 16; } if (rest >= 2) { h1 ^= @as(u32, @intCast(str[offset + 1])) << 8; } if (rest >= 1) { h1 ^= @as(u32, @intCast(str[offset + 0])); h1 *%= m; } h1 ^= h1 >> 13; h1 *%= m; h1 ^= h1 >> 15; return h1; }