From: Philipp Gesang <Philipp.Gesang@alumni.uni-heidelberg.de>
To: mailing list for ConTeXt users <ntg-context@ntg.nl>
Subject: Re: [util-jsn] incorrect handling of escapes
Date: Tue, 9 Jul 2013 11:37:43 +0200 [thread overview]
Message-ID: <20130709093743.GA15037@phlegethon> (raw)
In-Reply-To: <51DAE657.20704@wxs.nl>
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···<date: 2013-07-08, Monday>···<from: Hans Hagen>···
> On 7/8/2013 12:56 AM, Philipp Gesang wrote:
> >Hi,
> >
> >the JSON parser handles backslash escapes improperly. Example:
> >
> > local data = [[ { "escapes" : "(\")(\\)(\b)(\f)(\n)(\r)(\t)",
> > "invalid" : "\'\v" } ]]
> > local stuff = utilities.json.tolua (data)
> > inspect(stuff)
> >
> >Currently it chokes on double quotes and treats the other escapes
> >like Lua. Fix suggestion attached.
>
> local escapes = {
> -- ["\\"] = "\\", -- lua will escape these
> -- ["/"] = "/", -- no need to escape this one
> ["b"] = "\010",
> ["f"] = "\014",
> ["n"] = "\n",
> ["r"] = "\r",
> ["t"] = "\t",
> }
>
> local escape_un = C(P("\\u") / "0x" * S("09","AF","af")) /
> 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
Fine with me!
Best,
Philipp
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prev parent reply other threads:[~2013-07-09 9:37 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-07-07 22:56 Philipp Gesang
2013-07-08 16:18 ` Hans Hagen
2013-07-09 9:37 ` Philipp Gesang [this message]
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