local memory = {}

local constants = require("constants")

memory.Memory = {
    pages = 0,
    maxpages = -1,
}

function memory.Memory:new(pages)
    local m = {}
    setmetatable(m, {__index = self})
    m:grow(pages)
    return m
end

function memory.Memory:grow(pages)
    local initStart = self.pages * constants.WASM_PAGE_SIZE
    local initEnd = ((self.pages + pages) * constants.WASM_PAGE_SIZE) - 1
    for i = initStart, initEnd do
        self[i] = 0
    end
    self.pages = self.pages + pages
end

return memory