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tablebase file checks (#1911) #1927

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vondele
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@vondele vondele commented Jan 3, 2019

this addresses partially issue #1911 in that it documents the command for verifying the md5sum of downloaded tablebase files.

Additionally, a quick check of the file size (the size of each tb file modulo 64 is 16 as pointed out by @syzygy1) has been implemented.

No functional change.

this addresses partially issue official-stockfish#1911 in that it documents the command for verifying the md5sum of downloaded tablebase files.

Additionally, a quick check of the file size (the size of each tb file modulo 64 is 16 as pointed out by @syzygy1) has been implemented.

No functional change.
@mcostalba
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Patch is good for me.

Just a little nitpicking, please keep *mapping together with *baseAddress

        if (statbuf.st_size % 64 != 16)
        {
            std::cerr << "Corrupt tablebase file " << fname << std::endl;
            exit(1);
        }
        *mapping = statbuf.st_size;
        *baseAddress = mmap(nullptr, statbuf.st_size, PROT_READ, MAP_SHARED, fd, 0);

@snicolet snicolet closed this in bb843a0 Jan 4, 2019
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snicolet commented Jan 4, 2019

Merged via bb843a0, thanks!

I have also used exit(EXIT_FAILURE) instead of exit(1) everywhere in tbprobe.cpp to follow the style of benchmark.cpp and tt.cpp

joergoster pushed a commit to joergoster/Stockfish-old that referenced this pull request Feb 21, 2019
This addresses partially issue #1911 in that it documents in our
Readme the command that users can use to verifying the md5sum of
their downloaded tablebase files.

Additionally, a quick check of the file size (the size of each
tablebase file modulo 64 is 16 as pointed out by @syzygy1) has been
implemented at launch time in Stockfish.

Closes official-stockfish/Stockfish#1927
and official-stockfish/Stockfish#1911

No functional change.
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3 participants