\x89\x50\x4E\x47\x0D\x0A\x1A\x0A
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\x89\x50\x4E\x47\x0D\x0A\x1A\x0A
# bits2str --- turn an integer into readable ones and zeros

function bits2str(bits,        data, mask)
{
    if (bits == 0)
        return "0"

    mask = 1
    for (; bits != 0; bits = rshift(bits, 1))
        data = (and(bits, mask) ? "1" : "0") data

    while ((length(data) % 8) != 0)
        data = "0" data

    return data
}