Zig 0.17.0-dev (Split by item)

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parseYear4

Certificate.parseYear4

pub fn parseYear4(text: *const [4]u8) !u16

File

lib/std/crypto/Certificate.zig:698

Code

pub fn parseYear4(text: *const [4]u8) !u16 {
    const V = @Vector(4, u32);
    const bytes: V = text.*;
    const zero: V = @splat('0');
    const mmmm: V = .{ 1000, 100, 10, 1 };
    const d = bytes -% zero;
    if (@reduce(.Or, d > @as(V, @splat(9)))) {
        @branchHint(.unlikely);
        return error.CertificateTimeInvalid;
    }
    const result = @reduce(.Add, d *% mmmm);
    return @intCast(result);
}