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minetest.serialize: Reversible number serialization (#9722)

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* minetest.serialize: Reversible number to string conversion

The %a format is not supported in Lua 5.1.
This commit also adds two tests for number serialization.
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HybridDog 2020-04-22 16:43:48 +02:00 • committed by GitHub
parent 4361bfcb4d
commit 5355cb1d87
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2 changed files with 14 additions and 9 deletions
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11
builtin/common/serialize.lua
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@ -120,15 +120,8 @@ function core.serialize(x)
elseif tp == "function" then
return string.format("loadstring(%q)", string.dump(x))
elseif tp == "number" then
-- Serialize integers with string.format to prevent
-- scientific notation, which doesn't preserve
-- precision and breaks things like node position
-- hashes. Serialize floats normally.
if math.floor(x) == x then
return string.format("%d", x)
else
return tostring(x)
end
-- Serialize numbers reversibly with string.format
return string.format("%.17g", x)
elseif tp == "table" then
local vals = {}
local idx_dumped = {}