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<title>Mu - 076stream.mu</title>
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<pre id='vimCodeElement'>
<span class="Comment"># new type to help incrementally read texts (arrays of characters)</span>
<span class="muData">container</span> stream [
  index:number
  data:address:shared:array:character
]

<span class="muRecipe">recipe</span> new-stream s:address:shared:array:character<span class="muRecipe"> -&gt; </span>result:address:shared:stream [
  <span class="Constant">local-scope</span>
  <span class="Constant">load-ingredients</span>
  result<span class="Special"> &lt;- </span>new <span class="Constant">stream:type</span>
  i:address:number<span class="Special"> &lt;- </span>get-address *result, <span class="Constant">index:offset</span>
  *i<span class="Special"> &lt;- </span>copy <span class="Constant">0</span>
  d:address:address:shared:array:character<span class="Special"> &lt;- </span>get-address *result, <span class="Constant">data:offset</span>
  *d<span class="Special"> &lt;- </span>copy s
]

<span class="muRecipe">recipe</span> rewind-stream in:address:shared:stream<span class="muRecipe"> -&gt; </span>in:address:shared:stream [
  <span class="Constant">local-scope</span>
  <span class="Constant">load-ingredients</span>
  x:address:number<span class="Special"> &lt;- </span>get-address *in, <span class="Constant">index:offset</span>
  *x<span class="Special"> &lt;- </span>copy <span class="Constant">0</span>
]

<span class="muRecipe">recipe</span> read-line in:address:shared:stream<span class="muRecipe"> -&gt; </span>result:address:shared:array:character, in:address:shared:stream [
  <span class="Constant">local-scope</span>
  <span class="Constant">load-ingredients</span>
  idx:address:number<span class="Special"> &lt;- </span>get-address *in, <span class="Constant">index:offset</span>
  s:address:shared:array:character<span class="Special"> &lt;- </span>get *in, <span class="Constant">data:offset</span>
  next-idx:number<span class="Special"> &lt;- </span>find-next s, <span class="Constant">10/newline</span>, *idx
  result<span class="Special"> &lt;- </span>copy-range s, *idx, next-idx
  *idx<span class="Special"> &lt;- </span>add next-idx, <span class="Constant">1</span>  <span class="Comment"># skip newline</span>
]

<span class="muRecipe">recipe</span> end-of-stream? in:address:shared:stream<span class="muRecipe"> -&gt; </span>result:boolean [
  <span class="Constant">local-scope</span>
  <span class="Constant">load-ingredients</span>
  idx:number<span class="Special"> &lt;- </span>get *in, <span class="Constant">index:offset</span>
  s:address:shared:array:character<span class="Special"> &lt;- </span>get *in, <span class="Constant">data:offset</span>
  len:number<span class="Special"> &lt;- </span>length *s
  result<span class="Special"> &lt;- </span>greater-or-equal idx, len
]
</pre>
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