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Re: [Json] JSON: remove gap between Ecma-404 and IETF draft

2013-11-13 15:40:12
On 11/13/13 2:27 PM, "Paul Hoffman" <paul(_dot_)hoffman(_at_)vpnc(_dot_)org> 
wrote:

<no hat>

On Nov 13, 2013, at 12:24 PM, Joe Hildebrand (jhildebr)
<jhildebr(_at_)cisco(_dot_)com> wrote:

We would also need to change section 8.1 according to the mechanism that
was previously proposed:

00 00 00 xx  UTF-32BE
   00 xx ?? xx  UTF-16BE
   xx 00 00 00  UTF-32LE
   xx 00 xx ?? UTF-16LE
   xx xx ?? ?? UTF-8

in order to account for strings at the top level whose first character
has
a codepoint greater than 127.

A string at the top level of a JSON text still needs to start with an
ASCII " character, so the logic is still fine, I believe.


Without top level strings, the first *two* characters of any JSON text are
always ASCII.  This:


"?"  (that's U+0022 U+0100 U+0022)

would encode the first two characters in UTF-16BE as:

00 22 01 00

8.1 currently says:

00 00 00 xx UTF-32BE
00 xx 00 xx UTF-16BE
xx 00 00 00 UTF-32LE
xx 00 xx 00 UTF-16LE
xx xx xx xx UTF-8

So the JSON text above would not match any of the table entries, causing
an error.


-- 
Joe Hildebrand




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