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<h1><a href="../webs.html">Sources</a></h1>
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<h2>Compiler Webs</h2>
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<h2>Inbuild Modules</h2>
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<h2>Foundation</h2>
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<li><a href="../../../inweb/docs/foundation-module/index.html">foundation</a></li>
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<!--Weave of '1/tlm' generated by 7-->
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<ul class="crumbs"><li><a href="../webs.html">Source</a></li><li><a href="../compiler.html">Compiler</a></li><li><a href="index.html">problems</a></li><li><a href="index.html#1">Chapter 1: Starting Up</a></li><li><b>Telemetry</b></li></ul><p class="purpose">To log Inform's activity.</p>
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<ul class="toc"><li><a href="#SP1">§1. Telemetry</a></li></ul><hr class="tocbar">
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<p class="inwebparagraph"><a id="SP1"></a><b>§1. Telemetry. </b>The telemetry file is optional, and transcribes the outcome of each run. This
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is mainly for testing Inform, but may also be useful for teachers who want
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to monitor how a whole class is using the system.
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</p>
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<pre class="display">
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<span class="identifier">filename</span><span class="plain"> *</span><span class="identifier">spool_telemetry_to</span><span class="plain"> = </span><span class="identifier">NULL</span><span class="plain">;</span>
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<span class="reserved">void</span><span class="plain"> </span><span class="functiontext">Telemetry::locate_telemetry_file</span><span class="plain">(</span><span class="identifier">filename</span><span class="plain"> *</span><span class="identifier">F</span><span class="plain">) {</span>
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<span class="identifier">spool_telemetry_to</span><span class="plain"> = </span><span class="identifier">F</span><span class="plain">;</span>
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<span class="plain">}</span>
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<span class="reserved">int</span><span class="plain"> </span><span class="identifier">attempts_to_open_telemetry</span><span class="plain"> = 0;</span>
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<span class="identifier">text_stream</span><span class="plain"> </span><span class="identifier">telemetry_file_struct</span><span class="plain">; </span> <span class="comment">The actual telemetry file (if created)</span>
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<span class="identifier">text_stream</span><span class="plain"> *</span><span class="identifier">telemetry_file</span><span class="plain"> = &</span><span class="identifier">telemetry_file_struct</span><span class="plain">; </span> <span class="comment">Main telemetry stream</span>
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<span class="identifier">text_stream</span><span class="plain"> *</span><span class="identifier">telmy</span><span class="plain"> = </span><span class="identifier">NULL</span><span class="plain">; </span> <span class="comment">Current telemetry stream</span>
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<span class="reserved">void</span><span class="plain"> </span><span class="functiontext">Telemetry::ensure_telemetry_file</span><span class="plain">(</span><span class="reserved">void</span><span class="plain">) {</span>
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<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">spool_telemetry_to</span><span class="plain"> == </span><span class="identifier">NULL</span><span class="plain">) </span><span class="reserved">return</span><span class="plain">;</span>
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<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">telmy</span><span class="plain">) </span><span class="reserved">return</span><span class="plain">;</span>
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<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">attempts_to_open_telemetry</span><span class="plain">++ > 0) </span><span class="reserved">return</span><span class="plain">;</span>
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<span class="reserved">if</span><span class="plain"> (</span><span class="identifier">STREAM_OPEN_TO_FILE_APPEND</span><span class="plain">(</span><span class="identifier">telemetry_file</span><span class="plain">, </span><span class="identifier">spool_telemetry_to</span><span class="plain">, </span><span class="identifier">ISO_ENC</span><span class="plain">) == </span><span class="identifier">FALSE</span><span class="plain">)</span>
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<span class="functiontext">Problems::Fatal::filename_related</span><span class="plain">(</span><span class="string">"Can't open telemetry file"</span><span class="plain">, </span><span class="identifier">spool_telemetry_to</span><span class="plain">);</span>
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<span class="identifier">telmy</span><span class="plain"> = </span><span class="identifier">telemetry_file</span><span class="plain">;</span>
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<span class="identifier">WRITE_TO</span><span class="plain">(</span><span class="identifier">telmy</span><span class="plain">, </span><span class="string">"\</span><span class="plain">n</span><span class="string">-- -- -- -- -- -- -- --\</span><span class="plain">n</span><span class="string">%B (build %B): telemetry.\</span><span class="plain">n</span><span class="string">"</span><span class="plain">,</span>
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<span class="identifier">FALSE</span><span class="plain">, </span><span class="identifier">TRUE</span><span class="plain">);</span>
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<span class="reserved">int</span><span class="plain"> </span><span class="identifier">this_month</span><span class="plain"> = </span><span class="identifier">the_present</span><span class="plain">-></span><span class="identifier">tm_mon</span><span class="plain"> + 1;</span>
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<span class="reserved">int</span><span class="plain"> </span><span class="identifier">this_day</span><span class="plain"> = </span><span class="identifier">the_present</span><span class="plain">-></span><span class="identifier">tm_mday</span><span class="plain">;</span>
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<span class="reserved">int</span><span class="plain"> </span><span class="identifier">this_year</span><span class="plain"> = </span><span class="identifier">the_present</span><span class="plain">-></span><span class="identifier">tm_year</span><span class="plain"> + 1900;</span>
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<span class="identifier">WRITE_TO</span><span class="plain">(</span><span class="identifier">telmy</span><span class="plain">, </span><span class="string">"Running on %4d-%02d-%02d at %02d:%02d.\</span><span class="plain">n</span><span class="string">\</span><span class="plain">n</span><span class="string">"</span><span class="plain">,</span>
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<span class="identifier">this_year</span><span class="plain">, </span><span class="identifier">this_month</span><span class="plain">, </span><span class="identifier">this_day</span><span class="plain">, </span><span class="identifier">the_present</span><span class="plain">-></span><span class="identifier">tm_hour</span><span class="plain">, </span><span class="identifier">the_present</span><span class="plain">-></span><span class="identifier">tm_min</span><span class="plain">);</span>
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<span class="identifier">LOG</span><span class="plain">(</span><span class="string">"Opening telemetry file.\</span><span class="plain">n</span><span class="string">"</span><span class="plain">);</span>
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<span class="plain">}</span>
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<span class="reserved">void</span><span class="plain"> </span><span class="functiontext">Telemetry::write_to_telemetry_file</span><span class="plain">(</span><span class="identifier">wchar_t</span><span class="plain"> *</span><span class="identifier">m</span><span class="plain">) {</span>
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<span class="functiontext">Telemetry::ensure_telemetry_file</span><span class="plain">();</span>
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<span class="identifier">WRITE_TO</span><span class="plain">(</span><span class="identifier">telmy</span><span class="plain">, </span><span class="string">"The user says:\</span><span class="plain">n</span><span class="string">\</span><span class="plain">n</span><span class="string">%w\</span><span class="plain">n</span><span class="string">\</span><span class="plain">n</span><span class="string">"</span><span class="plain">, </span><span class="identifier">m</span><span class="plain">);</span>
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<span class="plain">}</span>
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</pre>
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<p class="inwebparagraph"></p>
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<p class="endnote">The function Telemetry::locate_telemetry_file appears nowhere else.</p>
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<p class="endnote">The function Telemetry::ensure_telemetry_file is used in 2/pl3 (<a href="2-pl3.html#SP9">§9</a>).</p>
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<p class="endnote">The function Telemetry::write_to_telemetry_file appears nowhere else.</p>
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<hr class="tocbar">
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<ul class="toc"><li><a href="1-pm.html">Back to 'Problems Module'</a></li><li><i>(This section ends Chapter 1: Starting Up.)</i></li></ul><hr class="tocbar">
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