Hello,

as GHW is a binary format, there is not grammar for it.  You have to
look at the sources to understand the format.  I am not sure that
a grammar is the best way to describe this format (for the same
reason, I suppose no one has written a grammar for mp3).

GHW supports all the vhdl types, including floating point types.

Tristan.


----- Mail original -----
> Dear Tristan,
> 
> I am looking for information regarding the GHDL Waveform (GHW) format
> that you have devised for use in GHDL.
> 
> As can be seen in the GTKwave manual, an implementation and interface
> for manipulating GHW data is part of the source code. According to
> the
> manual, you are the author of the GHW-relevant code in GTKwave
> (please
> correct if I'm wrong). Specifically, files ghwlib.c and ghwlib.h in
> the GTKwave source code, provide the necessary functionality for
> working with GHW. However, I wasn't able to locate a reference
> grammar
> for GHW, e.g. one that would be BNF/EBNF or yacc-like grammar.
> 
> Does such grammar exist? Is there any additional information on GHW
> that would help derive such grammar?
> 
> Thank you in advance.
> 
> Best regards
> Nikolaos Kavvadias
> 
> 

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