mirror of https://github.com/BOINC/boinc.git
77 lines
2.3 KiB
PHP
77 lines
2.3 KiB
PHP
<?php
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require_once("docutil.php");
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page_head("Back-end utility functions");
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echo "
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The following functions can be used in your validator and assimilator code:
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<hr>
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".html_text("
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int get_output_file_path(RESULT const&, std::string&);
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"),"
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Returns the path of a result's output file
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(parses result.xml_doc_out and computes the file's position in the
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<a href=hier_dir.php>hierarchical directory structure</a>).
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<p>
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Note: this function doesn't handle multiple output files
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(if there are multiple files, it returns the path of the first one).
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If your application has multiple output files, see below.
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<hr>
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".html_text("
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int try_fopen(char* path, FILE*& f, char* mode);
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")."
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Open a file, distinguishing between recoverable and nonrecoverable errors.
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Returns zero on success.
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Returns ERR_FOPEN if the directory is present but not the file
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(this is considered a nonrecoverable error).
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Returns ERR_OPENDIR if the directory is not there
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(this is generally a recoverable error, like NFS mount failure).
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<hr>
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".html_text("
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double median_mean_credit(vector<RESULT> const& results);
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")."
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Given a vector of N correct results, computes a canonical credit as follows:
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<ul>
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<li> if N==1, return that result's claimed credit
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<li> if N==2, return min of claimed credits
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<li> if N>2, toss out high and low claimed credit,
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and return the average of the rest.
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</ul>
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<hr>
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<h3>Multiple output files</h3>
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If your application has multiple output files
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you'll need to generalize get_output_file_path().
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To do this you'll need to know the following:
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<p>
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The database field 'result.xml_doc_out'
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describes a result's output files.
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It has the form
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".html_text("
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<file_info>...</file_info>
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[ ... ]
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<result>
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<name>foobar</name>
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<wu_name>blah</wu_name>
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<exit_status>blah</exit_status>
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<file_ref>...</file_ref>
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[ ... ]
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</result>
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"),"
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The components are:
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<ul>
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<li> The <b><name></b> element is the result name.
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<li> The <b><wu_name></b> element is the workunit name.
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<li> Each <b><file_ref></b> element is an association to an output file,
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described by a corresponding <b><file_info></b> element.
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</ul>
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<p>
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The XML document describing the sizes and checksums of the output
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files is a list of <b><file_info></b> elements,
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with the <b>nbytes</b> and <b>md5_cksum</b> fields present.
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The project back end
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must parse this field to find the locations and checksums of output files.
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";
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page_tail();
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?>
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