Hi Eric,
Thank you for the perfect answer! Could you please guide me with some
classes/methods names in libraries you told?
For memory-map the file with Boost.Interprocess, what is the class you have
in mind? I found basic_managed_mapped_file but how can i use it with
Boost.Xpressive regex_replace() function?
http://www.boost.org/doc/libs/1_46_1/doc/html/interprocess/managed_memory_se...
I've looked Boost.Filesystem other day and someone told me about
unique_path() function, could i use it even with concurrent tasks
(Boost.MPI)? Change the model of unique_path() with the rank of the process
will avoid overwrite the generated files?
http://www.boost.org/doc/libs/1_44_0/libs/filesystem/v3/doc/reference.html#u...
Best regards,
Júlio.
2011/4/2 Eric Niebler
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On 4/2/2011 8:23 AM, Júlio Hoffimann wrote: <snip>
As far as i know, Boost.Xpressive treats only std::string and C-like strings.
Not so. Both Boost.Xpressive and Boost.Regex work on bidirectional iterator.
What i need to do for work with text files? Put them inside a std::string?
That's one way. A more efficient way would be to memory-map the file, which I think you can do portably using Boost.Interprocess. That should give you a random-access iterator to the source file.
About the performance, the files has approximately 10^3 lines, the search and replace will be an issue?
You should use the version of regex_replace that takes an output iterator, and either write into a string or vector. They both grow their capacity exponentially (or should if your STL implementation is worth anything), so this is quite efficient. Or, with an ofstream iterator, you can write directly to a temporary output file. I think the latest version of Boost.Filesystem has a portable way to create temporary files. Then you can do whatever you want with the temp file.
HTH,
- -- Eric Niebler BoostPro Computing http://www.boostpro.com -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/
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