bit_ops

针对原始整数类型进行常见的位操作，重点关注与 no_std 和 const 兼容性。与其他提供创建复杂高级类型工具的 crate 不同，bit_ops 的重点是原始整数类型。

文档

查看 https://docs.rs/bit_ops。

示例

fn main() {
    // PREREQUISITES: Some Definitions

    /// See specification of the x86 IOAPIC redirection entry for more details.
    mod x86_ioapic {
        pub const VECTOR_BITS: u64 = 8;
        pub const VECTOR_SHIFT: u64 = 0;
        pub const DELIVERY_MODE_BITS: u64 = 3;
        pub const DELIVERY_MODE_SHIFT: u64 = 8;
        pub const DESTINATION_MODE_BITS: u64 = 1;
        pub const DESTINATION_MODE_SHIFT: u64 = 11;
        pub const PIN_POLARITY_BITS: u64 = 1;
        pub const PIN_POLARITY_SHIFT: u64 = 13;
        pub const TRIGGER_MODE_BITS: u64 = 1;
        pub const TRIGGER_MODE_SHIFT: u64 = 15;
        pub const MASKED_BITS: u64 = 1;
        pub const MASKED_SHIFT: u64 = 16;
        pub const DESTINATION_BITS: u64 = 8;
        pub const DESTINATION_SHIFT: u64 = 56;
    }

    use x86_ioapic::*;

    // ACTUAL LIBRARY USAGE BEGINS HERE

    let redirection_entry = bit_ops::bitops_u64::set_bits_exact_n(
        0,
        &[
            (7, VECTOR_BITS, VECTOR_SHIFT),
            (0b111 /* ExtInt */, DELIVERY_MODE_BITS, DELIVERY_MODE_SHIFT),
            (0 /* physical */, DESTINATION_MODE_BITS, DESTINATION_MODE_SHIFT),
            (1 /* low-active */, PIN_POLARITY_BITS, PIN_POLARITY_SHIFT),
            (1 /* level-triggered */, TRIGGER_MODE_BITS, TRIGGER_MODE_SHIFT),
            (1 /* masked */, MASKED_BITS, MASKED_SHIFT),
            (13 /* APIC ID */, DESTINATION_BITS, DESTINATION_SHIFT),
        ],
    );
    assert_eq!(redirection_entry, 0xd0000000001a707);
}

最低支持版本

1.57.0 稳定版

许可证

MIT 许可证。请参阅 LICENSE 文件。