tiny.sql.History.ByteRange

1pub const ByteRange = struct {2        pub const Count = u64;3        pub const unit_precision_bytes: Count = 1;4        pub const maximum_units_per_second: Count = 512 * 1024 * 1024;5        pub const maximum_seconds_per_year: Count = 366 * 24 * 60 * 60;6        pub const service_lifetime_years: Count = 1_000;7        pub const service_lifetime_seconds: Count =8            maximum_seconds_per_year * service_lifetime_years;9        pub const maximum_append_bytes: Count =10            @as(Count, record_mod.record_header_size) + std.math.maxInt(u32);11        pub const budget_bytes: Count = total(12            maximum_units_per_second,13            service_lifetime_seconds,14        ).?;1516        pub fn total(17            units_per_second: Count,18            lifetime_seconds: Count,19        ) ?Count {20            const bytes_per_second = std.math.mul(21                Count,22                unit_precision_bytes,23                units_per_second,24            ) catch return null;25            return std.math.mul(Count, bytes_per_second, lifetime_seconds) catch null;26        }27    };