Function asBytes [src]

Given a pointer to a single item, returns a slice of the underlying bytes, preserving pointer attributes.

Prototype

pub fn asBytes(ptr: anytype) AsBytesReturnType(@TypeOf(ptr))

Example

 test asBytes {
    const deadbeef = @as(u32, 0xDEADBEEF);
    const deadbeef_bytes = switch (native_endian) {
        .big => "\xDE\xAD\xBE\xEF",
        .little => "\xEF\xBE\xAD\xDE",
    };

    try testing.expect(eql(u8, asBytes(&deadbeef), deadbeef_bytes));

    var codeface = @as(u32, 0xC0DEFACE);
    for (asBytes(&codeface)) |*b|
        b.* = 0;
    try testing.expect(codeface == 0);

    const S = packed struct {
        a: u8,
        b: u8,
        c: u8,
        d: u8,
    };

    const inst = S{
        .a = 0xBE,
        .b = 0xEF,
        .c = 0xDE,
        .d = 0xA1,
    };
    switch (native_endian) {
        .little => {
            try testing.expect(eql(u8, asBytes(&inst), "\xBE\xEF\xDE\xA1"));
        },
        .big => {
            try testing.expect(eql(u8, asBytes(&inst), "\xA1\xDE\xEF\xBE"));
        },
    }

    const ZST = struct {};
    const zero = ZST{};
    try testing.expect(eql(u8, asBytes(&zero), ""));
}

Source

  pub fn asBytes(ptr: anytype) AsBytesReturnType(@TypeOf(ptr)) {
    return @ptrCast(@alignCast(ptr));
}  