Re: Static JSON parser for embedded

From	pozz <pozzugno@gmail.com>
Newsgroups	comp.lang.c, comp.arch.embedded
Subject	Re: Static JSON parser for embedded
Date	2019-06-06 09:54 +0200
Organization	A noiseless patient Spider
Message-ID	<qdagrt$fb$1@dont-email.me> (permalink)
References	<qblnbg$402$1@dont-email.me> <2hODE.56712$8B4.29775@fx02.iad> <qd8kff$j0t$1@dont-email.me> <4xYJE.48747$RP3.172@fx11.iad>

Cross-posted to 2 groups.

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Il 06/06/2019 01:48, Clifford Heath ha scritto:
> On 6/6/19 12:44 am, pozz wrote:
>>> So there is existing work, and no doubt community support for more.
>>> You could do a lot worse than start with ASN1CC.
>>
>> I eventually take a look at asn1scc and found a big limitation: it 
>> doesn't support extensibility feature of ASN.1.
> 
> One more comment. You mention (in other messages) that JSON is difficult 
> without using dynamic memory. ASN1CC is designed to avoid using dynamic 
> memory (for the same reason; embedded system constraints), which is why 
> it cannot implement arbitrary extensions. The best it could do is to 
> skip unknown extensions. 

Yes, many times this behaviour is good, instead of breaking at all the 
system.

> But in PER, items are not tagged or 
> length-delimited, and skipping an extension requires at least a 
> knowledge of how big it is.

Ok, PER can't be used to skip extended variables. However I can use BER. 
Why do asn1scc refuses to compile definitions file with extensions when 
BER is used?

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Static JSON parser for embedded pozz <pozzugno@gmail.com> - 2019-05-17 09:20 +0200
  Re: Static JSON parser for embedded Jorgen Grahn <grahn+nntp@snipabacken.se> - 2019-05-17 08:48 +0000
    Re: Static JSON parser for embedded pozz <pozzugno@gmail.com> - 2019-05-17 11:06 +0200
      Re: Static JSON parser for embedded Jorgen Grahn <grahn+nntp@snipabacken.se> - 2019-05-17 11:22 +0000
        Re: Static JSON parser for embedded Thiago Adams <thiago.adams@gmail.com> - 2019-05-17 04:40 -0700
          Re: Static JSON parser for embedded pozz <pozzugno@gmail.com> - 2019-05-17 14:10 +0200
            Re: Static JSON parser for embedded Thiago Adams <thiago.adams@gmail.com> - 2019-05-17 05:18 -0700
              Re: Static JSON parser for embedded Jorgen Grahn <grahn+nntp@snipabacken.se> - 2019-05-18 18:18 +0000
        Re: Static JSON parser for embedded pozz <pozzugno@gmail.com> - 2019-05-17 14:10 +0200
          Re: Static JSON parser for embedded Jorgen Grahn <grahn+nntp@snipabacken.se> - 2019-05-18 18:22 +0000
  Re: Static JSON parser for embedded Bart <bc@freeuk.com> - 2019-05-17 11:39 +0100
    Re: Static JSON parser for embedded pozz <pozzugno@gmail.com> - 2019-05-17 13:19 +0200
      Re: Static JSON parser for embedded Thiago Adams <thiago.adams@gmail.com> - 2019-05-17 05:09 -0700
        Re: Static JSON parser for embedded Thiago Adams <thiago.adams@gmail.com> - 2019-05-17 05:15 -0700
      Re: Static JSON parser for embedded Bart <bc@freeuk.com> - 2019-05-17 15:06 +0100
        Re: Static JSON parser for embedded pozz <pozzugno@gmail.com> - 2019-05-17 16:37 +0200
          Re: Static JSON parser for embedded Bart <bc@freeuk.com> - 2019-05-17 17:56 +0100
            Re: Static JSON parser for embedded "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2019-05-17 10:21 -0700
              Re: Static JSON parser for embedded Bart <bc@freeuk.com> - 2019-05-17 18:43 +0100
                Re: Static JSON parser for embedded Thiago Adams <thiago.adams@gmail.com> - 2019-05-17 10:58 -0700
                Re: Static JSON parser for embedded "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2019-05-17 11:16 -0700
                Re: Static JSON parser for embedded Bart <bc@freeuk.com> - 2019-05-17 19:43 +0100
                Re: Static JSON parser for embedded "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2019-05-17 11:57 -0700
                Re: Static JSON parser for embedded Bart <bc@freeuk.com> - 2019-05-17 20:11 +0100
                Re: Static JSON parser for embedded "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2019-05-17 12:22 -0700
                Re: Static JSON parser for embedded Ben Bacarisse <ben.usenet@bsb.me.uk> - 2019-05-17 21:33 +0100
                Re: Static JSON parser for embedded pozz <pozzugno@gmail.com> - 2019-05-18 00:11 +0200
            Re: Static JSON parser for embedded Bart <bc@freeuk.com> - 2019-05-17 22:33 +0100
              Re: Static JSON parser for embedded pozz <pozzugno@gmail.com> - 2019-05-18 00:17 +0200
                Re: Static JSON parser for embedded Bart <bc@freeuk.com> - 2019-05-18 01:25 +0100
            Re: Static JSON parser for embedded pozz <pozzugno@gmail.com> - 2019-05-17 23:43 +0200
  Re: Static JSON parser for embedded Thiago Adams <thiago.adams@gmail.com> - 2019-05-17 04:38 -0700
  Re: Static JSON parser for embedded "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2019-05-17 07:38 -0700
    Re: Static JSON parser for embedded Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2019-05-17 08:05 -0700
      Re: Static JSON parser for embedded "Rick C. Hodgin" <rick.c.hodgin@gmail.com> - 2019-05-17 08:15 -0700
      Re: Static JSON parser for embedded Lew Pitcher <lew.pitcher@digitalfreehold.ca> - 2019-05-17 11:53 -0400
  Re: Static JSON parser for embedded Ian Collins <ian-news@hotmail.com> - 2019-05-18 15:33 +1200
    Re: Static JSON parser for embedded Bart <bc@freeuk.com> - 2019-05-18 11:57 +0100
  Re: Static JSON parser for embedded Clifford Heath <no.spam@please.net> - 2019-05-18 17:14 +1000
    Re: Static JSON parser for embedded pozz <pozzugno@gmail.com> - 2019-05-18 16:03 +0200
      Re: Static JSON parser for embedded Clifford Heath <no.spam@please.net> - 2019-05-19 09:12 +1000
        Re: Static JSON parser for embedded Niklas Holsti <niklas.holsti@tidorum.invalid> - 2019-05-19 17:13 +0300
          Re: Static JSON parser for embedded Clifford Heath <no.spam@please.net> - 2019-05-20 09:25 +1000
        Re: Static JSON parser for embedded pozz <pozzugno@gmail.com> - 2019-06-06 11:12 +0200
          Re: Static JSON parser for embedded Clifford Heath <no.spam@please.net> - 2019-06-07 09:11 +1000
            Re: Static JSON parser for embedded pozz <pozzugno@gmail.com> - 2019-06-07 08:59 +0200
              Re: Static JSON parser for embedded Clifford Heath <no.spam@please.net> - 2019-06-12 09:41 +1000
    Re: Static JSON parser for embedded pozz <pozzugno@gmail.com> - 2019-06-05 16:44 +0200
      Re: Static JSON parser for embedded Clifford Heath <no.spam@please.net> - 2019-06-06 09:27 +1000
        Re: Static JSON parser for embedded pozz <pozzugno@gmail.com> - 2019-06-06 09:50 +0200
          Re: Static JSON parser for embedded Clifford Heath <no.spam@please.net> - 2019-06-07 09:08 +1000
      Re: Static JSON parser for embedded Clifford Heath <no.spam@please.net> - 2019-06-06 09:48 +1000
        Re: Static JSON parser for embedded pozz <pozzugno@gmail.com> - 2019-06-06 09:54 +0200

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