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<pre id='vimCodeElement'>
<span class="Comment"># Wrappers around file-system primitives that take a 'filesystem' object and</span>
<span class="Comment"># are thus easier to test.</span>
<span class="muData">container</span> filesystem [
data:address:array:file-mapping
]
<span class="muData">container</span> file-mapping [
name:address:array:character
contents:address:array:character
]
<span class="muRecipe">def</span> start-reading fs:address:filesystem, filename:address:array:character<span class="muRecipe"> -> </span>contents:address:source:character [
<span class="Constant">local-scope</span>
<span class="Constant">load-ingredients</span>
<span class="Delimiter">{</span>
<span class="muControl">break-if</span> fs
<span class="Comment"># real file-system</span>
file:number<span class="Special"> <- </span>$open-file-for-reading filename
assert file, <span class="Constant">[file not found]</span>
contents:address:source:character, sink:address:sink:character<span class="Special"> <- </span>new-channel <span class="Constant">30</span>
start-running transmit-from-file file, sink
<span class="muControl">return</span>
<span class="Delimiter">}</span>
<span class="Comment"># fake file system</span>
i:number<span class="Special"> <- </span>copy <span class="Constant">0</span>
data:address:array:file-mapping<span class="Special"> <- </span>get *fs, <span class="Constant">data:offset</span>
len:number<span class="Special"> <- </span>length *data
<span class="Delimiter">{</span>
done?:boolean<span class="Special"> <- </span>greater-or-equal i, len
<span class="muControl">break-if</span> done?
tmp:file-mapping<span class="Special"> <- </span>index *data, i
curr-filename:address:array:character<span class="Special"> <- </span>get tmp, <span class="Constant">name:offset</span>
found?:boolean<span class="Special"> <- </span>equal filename, curr-filename
<span class="muControl">loop-unless</span> found?
contents:address:source:character, sink:address:sink:character<span class="Special"> <- </span>new-channel <span class="Constant">30</span>
curr-contents:address:array:character<span class="Special"> <- </span>get tmp, <span class="Constant">contents:offset</span>
start-running transmit-from-text curr-contents, sink
<span class="muControl">return</span>
<span class="Delimiter">}</span>
<span class="muControl">return</span> <span class="Constant">0/not-found</span>
]
<span class="muRecipe">def</span> transmit-from-file file:number, sink:address:sink:character<span class="muRecipe"> -> </span>sink:address:sink:character [
<span class="Constant">local-scope</span>
<span class="Constant">load-ingredients</span>
<span class="Delimiter">{</span>
c:character<span class="Special"> <- </span>$read-from-file file
<span class="muControl">break-unless</span> c
sink<span class="Special"> <- </span>write sink, c
<span class="muControl">loop</span>
<span class="Delimiter">}</span>
sink<span class="Special"> <- </span>close sink
$close-file file
]
<span class="muRecipe">def</span> transmit-from-text contents:address:array:character, sink:address:sink:character<span class="muRecipe"> -> </span>sink:address:sink:character [
<span class="Constant">local-scope</span>
<span class="Constant">load-ingredients</span>
i:number<span class="Special"> <- </span>copy <span class="Constant">0</span>
len:number<span class="Special"> <- </span>length *contents
<span class="Delimiter">{</span>
done?:boolean<span class="Special"> <- </span>greater-or-equal i, len
<span class="muControl">break-if</span> done?
c:character<span class="Special"> <- </span>index *contents, i
sink<span class="Special"> <- </span>write sink, c
i<span class="Special"> <- </span>add i, <span class="Constant">1</span>
<span class="muControl">loop</span>
<span class="Delimiter">}</span>
sink<span class="Special"> <- </span>close sink
]
<span class="muRecipe">def</span> start-writing fs:address:filesystem, filename:address:array:character<span class="muRecipe"> -> </span>sink:address:sink:character, routine-id:number [
<span class="Constant">local-scope</span>
<span class="Constant">load-ingredients</span>
file:number<span class="Special"> <- </span>$open-file-for-writing filename
source:address:source:character, sink:address:sink:character<span class="Special"> <- </span>new-channel <span class="Constant">30</span>
routine-id<span class="Special"> <- </span>start-running transmit-to-file file, source
]
<span class="muRecipe">def</span> transmit-to-file file:number, source:address:source:character<span class="muRecipe"> -> </span>file:number, source:address:source:character [
<span class="Constant">local-scope</span>
<span class="Constant">load-ingredients</span>
<span class="Delimiter">{</span>
c:character, done?:boolean, source<span class="Special"> <- </span>read source
<span class="muControl">break-if</span> done?
$write-to-file file, c
<span class="muControl">loop</span>
<span class="Delimiter">}</span>
$close-file file
]
</pre>
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