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fix unicode character decoding in json strings #32

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fix unicode character decoding in json strings #32

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4 changes: 3 additions & 1 deletion lualibs-util-jsn.lua
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Original file line number Diff line number Diff line change
Expand Up @@ -38,6 +38,7 @@ local rparent = P("]")
local comma = P(",")
local colon = P(":")
local dquote = P('"')
local hexdigit = S("0123456789abcdefABCDEF")

local whitespace = lpeg.patterns.whitespace
local optionalws = whitespace^0
Expand All @@ -52,7 +53,8 @@ local escapes = {
["t"] = "\t",
}

local escape_un = C(P("\\u") / "0x" * S("09","AF","af")) / function(s) return utfchar(tonumber(s)) end
local escape_un = Cs(P"\\u" / "0x" * hexdigit * 3) / function(s) return utfchar(tonumber(s)) end

local escape_bs = P([[\]]) / "" * (P(1) / escapes) -- if not found then P(1) is returned i.e. the to be escaped char

local jstring = dquote * Cs((escape_un + escape_bs + (1-dquote))^0) * dquote
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