[erlang-questions] reading traces from a file in c/c++
Thu Oct 21 21:50:55 CEST 2010
I don't have an immediate solution to your question, but this has been
on my to-do list for a while as I am in the process of rewriting the EPI
to make certain Erlang-like features available in C++.
What I got working so far is:
1. Support for all types of terms: long/double/string/atom/pid/port/ref
via reference counting or copying depending on object's footprint. All
terms are pretty intelligent and lightweight in a way that you never
need to call new/delete in your code.
2. Support for an atom table.
3. All the marshaling/demarshaling functionality.
4. Distributed client-side connectivity to Erlang nodes and appropriate
epmd connectivity for port discovery.
5. Support for mailboxes with fully asynchronous API allowing making
non-blocking mailbox::recv() calls with completion notifications.
6. The entire application can run in a single thread (everything is
non-blocking) or many threads if needed (currently using boost::asio for
event looping, dispatching and networking).
The next item on my to do list is to add server-side support for
creating a C++ Erlang node with epmd registration.
Reading Erlang terms from a file can be accomplished by writing a
boost::spirit based parser, and a similar example is available here:
I am planning to release the project to public once it's in somewhat
more complete and working stage. However, if you wish to contribute,
and write a parser to read and transform a text file in Erlang terms
from my C++ library, there's room for some joint work.
On 10/21/2010 9:08 AM, Joel Reymont wrote:
> What is the easiest way to incrementally read through a file of Erlang traces outside of Erlang?
> I could not see any functions for reading terms from file in the ei library.
> Is it a matter of always reading in a chunk big enough for any term, trying ei decoding functions and reading more of the same chunk if decoding fails?
> Thanks, Joel
> erlang-questions (at) erlang.org mailing list.
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