Re: Which newsgroup for json parsing?

On 16/05/2024 19:53, Scott Lurndal wrote:

=?UTF-8?Q?Josef_M=C3=B6llers?= <josef@invalid.invalid> writes:

On 16.05.24 18:27, Mikko wrote:

On 2024-05-08 13:04:56 +0000, Josef Möllers said:
>

Hi all,
>
I am trying to parse a json string received through MQTT from a
"Shelly Plug S", e.g.
{"id":0, "source":"button", "output":true, "apower":0.0,
"voltage":237.9, "current":0.000,
"aenergy":{"total":0.000,"by_minute":[0.000,0.000,0.000],"minute_ts":1715172119},"temperature":{"tC":41.1, "tF":106.0}}
>
I am trying to use libjson-glib but I can't figure out what to use as
the first argument to json_gobject_from_data()!
I am also looking at libjson-c but cannot find any examples that could
guide me.
>
Thanks in advance,

>
Sometimes it is easier to make a parser than to use an existing one.
In this case I might try LEX.
>

>
Sorry to be nitpicking, but lex is a "lexical analyzer" aka a "scanner",
it can only recognize tokens, eg the brackets, quotes, identifiers etc,
but not structures.
"yacc" (or its "bison" equivalent" would be a parser but definitely too
heavy.
>
What one could do would be to use LEX to recognize the tokens and the
write a recursive descent parser in plain C.

 I've done full expression parsing and subsequent evaluation with
lex (or flex).  No parser needed.
 

You've done 'full expression PARSING', then you say 'No PARSER needed'.
A bit contradictory?
Clearly parsing IS needed, so either you've used LEX from code that acts as a parser, or it does more than just recognise tokens.