Function readPackedInt [src]

Loads an integer from packed memory. Asserts that buffer contains at least bit_offset + @bitSizeOf(T) bits.

Prototype

pub fn readPackedInt(comptime T: type, bytes: []const u8, bit_offset: usize, endian: Endian) T

Parameters

T: typebytes: []const u8bit_offset: usizeendian: Endian

Example

 test readPackedInt {
    const T = packed struct(u16) { a: u3, b: u7, c: u6 };
    var st = T{ .a = 1, .b = 2, .c = 4 };
    const b_field = readPackedInt(u7, std.mem.asBytes(&st), @bitOffsetOf(T, "b"), builtin.cpu.arch.endian());
    try std.testing.expectEqual(st.b, b_field);
}

Source

  pub fn readPackedInt(comptime T: type, bytes: []const u8, bit_offset: usize, endian: Endian) T {
    switch (endian) {
        .little => return readPackedIntLittle(T, bytes, bit_offset),
        .big => return readPackedIntBig(T, bytes, bit_offset),
    }
}  