* Re: [Emacs-diffs] master 93be35e: Fix encoding of JSON surrogate pairs
[not found] ` <20170101122441.55FB1220152@vcs.savannah.gnu.org>
@ 2017-01-01 14:55 ` Stefan Monnier
2017-01-15 20:34 ` Philipp Stephani
0 siblings, 1 reply; 2+ messages in thread
From: Stefan Monnier @ 2017-01-01 14:55 UTC (permalink / raw)
To: emacs-devel; +Cc: Philipp Stephani
> + ;; Special-case UTF-16 surrogate pairs,
> + ;; cf. https://tools.ietf.org/html/rfc7159#section-7. Note that
> + ;; this clause overlaps with the next one and therefore has to
> + ;; come first.
> + ((looking-at
> + (rx (group (any "Dd") (any "89ABab") (= 2 (any "0-9A-Fa-f")))
> + "\\u" (group (any "Dd") (any "C-Fc-f") (= 2 (any "0-9A-Fa-f")))))
> + (json-advance 10)
> + (json--decode-utf-16-surrogates
> + (string-to-number (match-string 1) 16)
> + (string-to-number (match-string 2) 16)))
> ((looking-at "[0-9A-Fa-f][0-9A-Fa-f][0-9A-Fa-f][0-9A-Fa-f]")
Wouldn't it be better to move the surrogate-handling into the
hex-handling branch?
Stefan
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [Emacs-diffs] master 93be35e: Fix encoding of JSON surrogate pairs
2017-01-01 14:55 ` [Emacs-diffs] master 93be35e: Fix encoding of JSON surrogate pairs Stefan Monnier
@ 2017-01-15 20:34 ` Philipp Stephani
0 siblings, 0 replies; 2+ messages in thread
From: Philipp Stephani @ 2017-01-15 20:34 UTC (permalink / raw)
To: Stefan Monnier, emacs-devel; +Cc: Philipp Stephani
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Stefan Monnier <monnier@iro.umontreal.ca> schrieb am So., 1. Jan. 2017 um
15:56 Uhr:
> > + ;; Special-case UTF-16 surrogate pairs,
> > + ;; cf. https://tools.ietf.org/html/rfc7159#section-7. Note that
> > + ;; this clause overlaps with the next one and therefore has to
> > + ;; come first.
> > + ((looking-at
> > + (rx (group (any "Dd") (any "89ABab") (= 2 (any "0-9A-Fa-f")))
> > + "\\u" (group (any "Dd") (any "C-Fc-f") (= 2 (any
> "0-9A-Fa-f")))))
> > + (json-advance 10)
> > + (json--decode-utf-16-surrogates
> > + (string-to-number (match-string 1) 16)
> > + (string-to-number (match-string 2) 16)))
> > ((looking-at "[0-9A-Fa-f][0-9A-Fa-f][0-9A-Fa-f][0-9A-Fa-f]")
>
> Wouldn't it be better to move the surrogate-handling into the
> hex-handling branch?
>
Maybe, I don't have a strong preference. The current solution avoids an
additional nested conditional though.
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[not found] ` <20170101122441.55FB1220152@vcs.savannah.gnu.org>
2017-01-01 14:55 ` [Emacs-diffs] master 93be35e: Fix encoding of JSON surrogate pairs Stefan Monnier
2017-01-15 20:34 ` Philipp Stephani
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