local util = {}

function util.strsplit(delimiter, text)
    local list = {}
    local pos = 1
    while true do
        local first, last = text:find(delimiter, pos)
        if first then -- found?
            table.insert(list, text:sub(pos, first-1))
            pos = last+1
        else
            table.insert(list, text:sub(pos))
            break
        end
    end
    return list
end

function util.commavalue(n)
    local left,num,right = string.match(n,'^([^%d]*%d)(%d*)(.-)$')
    return left..(num:reverse():gsub('(%d%d%d)','%1,'):reverse())..right
end

function util.round (number, precision)
    precision = precision or 0

    local decimal = string.find(tostring(number), ".", nil, true);

    if ( decimal ) then
        local power = 10 ^ precision;

        if ( number >= 0 ) then
            number = math.floor(number * power + 0.5) / power;
        else
            number = math.ceil(number * power - 0.5) / power;
        end

        -- convert number to string for formatting
        number = tostring(number);

        -- set cutoff
        local cutoff = number:sub(decimal + 1 + precision);

        -- delete everything after the cutoff
        number = number:gsub(cutoff, "");
    else
        -- number is an integer
        if ( precision > 0 ) then
            number = tostring(number);

            number = number .. ".";

            for i = 1,precision
            do
                number = number .. "0";
            end
        end
    end
    return number;
end

function util.inBounds(volume, x, y, z)
    return (x <= volume.xEnd and x >= volume.xStart and y <= volume.yEnd and y >= volume.yStart and z <= volume.zEnd and z >= volume.zStart)
end

return util