RosettaCodeData/Task/Bitmap-PPM-conversion-through-a-pipe/Phix/bitmap-ppm-conversion-through-a-pipe.phix

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 <span style="color: #000080;font-style:italic;">-- demo\rosetta\Bitmap_PPM_conversion_through_a_pipe.exw</span>
 <span style="color: #008080;">without</span> <span style="color: #008080;">js</span> <span style="color: #000080;font-style:italic;">-- file i/o, system_exec(), pipes[!!]</span>
 <span style="color: #008080;">include</span> <span style="color: #000000;">builtins</span><span style="color: #0000FF;">\</span><span style="color: #000000;">pipeio</span><span style="color: #0000FF;">.</span><span style="color: #000000;">e</span>
 <span style="color: #008080;">include</span> <span style="color: #000000;">builtins</span><span style="color: #0000FF;">\</span><span style="color: #7060A8;">serialize</span><span style="color: #0000FF;">.</span><span style="color: #000000;">e</span>
 <span style="color: #008080;">include</span> <span style="color: #000000;">ppm</span><span style="color: #0000FF;">.</span><span style="color: #000000;">e</span> <span style="color: #000080;font-style:italic;">-- read_ppm()</span>

 <span style="color: #004080;">sequence</span> <span style="color: #000000;">pipes</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">repeat</span><span style="color: #0000FF;">(</span><span style="color: #000000;">0</span><span style="color: #0000FF;">,</span><span style="color: #000000;">3</span><span style="color: #0000FF;">)</span>
 <span style="color: #000000;">pipes</span><span style="color: #0000FF;">[</span><span style="color: #000000;">PIPEIN</span><span style="color: #0000FF;">]</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">create_pipe</span><span style="color: #0000FF;">(</span><span style="color: #000000;">INHERIT_WRITE</span><span style="color: #0000FF;">)</span>

 <span style="color: #000080;font-style:italic;">-- Create the child process, with replacement stdin. </span>
 <span style="color: #004080;">string</span> <span style="color: #000000;">cmd</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">sprintf</span><span style="color: #0000FF;">(</span><span style="color: #008000;">"%s viewppm -save test.jpg"</span><span style="color: #0000FF;">,{</span><span style="color: #7060A8;">get_interpreter</span><span style="color: #0000FF;">(</span><span style="color: #004600;">true</span><span style="color: #0000FF;">)})</span>
 <span style="color: #004080;">atom</span> <span style="color: #000000;">hProc</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">system_exec</span><span style="color: #0000FF;">(</span><span style="color: #000000;">cmd</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">12</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">pipes</span><span style="color: #0000FF;">),</span>
      <span style="color: #000000;">hPipe</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">pipes</span><span style="color: #0000FF;">[</span><span style="color: #000000;">PIPEIN</span><span style="color: #0000FF;">][</span><span style="color: #000000;">WRITE_PIPE</span><span style="color: #0000FF;">]</span>

 <span style="color: #004080;">sequence</span> <span style="color: #000000;">img</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">serialize</span><span style="color: #0000FF;">(</span><span style="color: #000000;">read_ppm</span><span style="color: #0000FF;">(</span><span style="color: #008000;">"Lena.ppm"</span><span style="color: #0000FF;">,</span><span style="color: #000000;">bFlat</span><span style="color: #0000FF;">:=</span><span style="color: #004600;">true</span><span style="color: #0000FF;">))</span>
 <span style="color: #008080;">if</span> <span style="color: #008080;">not</span> <span style="color: #000000;">write_to_pipe</span><span style="color: #0000FF;">(</span><span style="color: #000000;">hPipe</span><span style="color: #0000FF;">,</span><span style="color: #000000;">img</span><span style="color: #0000FF;">)</span> <span style="color: #008080;">then</span> <span style="color: #7060A8;">crash</span><span style="color: #0000FF;">(</span><span style="color: #008000;">"error"</span><span style="color: #0000FF;">)</span> <span style="color: #008080;">end</span> <span style="color: #008080;">if</span>

 <span style="color: #000080;font-style:italic;">-- Close the pipe handle so the child process stops reading.
 --hPipe = close_handles(hPipe)</span>
 <span style="color: #000000;">pipes</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">close_handles</span><span style="color: #0000FF;">(</span><span style="color: #000000;">pipes</span><span style="color: #0000FF;">)</span> <span style="color: #000080;font-style:italic;">-- (may as well do the lot)</span>

 <span style="color: #0000FF;">?</span><span style="color: #008000;">"done"</span>
 <span style="color: #0000FF;">{}</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">wait_key</span><span style="color: #0000FF;">()</span>
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