2996

author: Kartik K. Agaram <vc@akkartik.com> 2016-05-21 17:44:53 -0700
committer: Kartik K. Agaram <vc@akkartik.com> 2016-05-21 17:44:53 -0700
commit: 2f02189ddcdeb7d25b0ca9bd5b955b764d41a1a7 (patch)
tree: 7c2e8b6e37ae3201dc01e90bcb390ee60b7f4a77 /html/038new_text.cc.html
parent: 61c025b11ed4ddd002f09f061fd77c75d8b6d0ba (diff)
download: mu-2f02189ddcdeb7d25b0ca9bd5b955b764d41a1a7.tar.gz
1 files changed, 161 insertions, 0 deletions
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+<title>Mu - 038new_text.cc</title>
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+<pre id='vimCodeElement'>
+<span class="Comment">//: Extend 'new' to handle a unicode string literal argument.</span>
+
+<span class="Delimiter">:(scenario new_string)</span>
+def main [
+  <span class="Constant">1</span>:address:array:character<span class="Special"> &lt;- </span><span class="Normal">new</span> [abc def]
+  <span class="Constant">2</span>:character<span class="Special"> &lt;- </span>index *<span class="Constant">1</span>:address:array:character<span class="Delimiter">,</span> <span class="Constant">5</span>
+]
+<span class="Comment"># number code for 'e'</span>
+<span class="traceContains">+mem: storing 101 in location 2</span>
+
+<span class="Delimiter">:(scenario new_string_handles_unicode)</span>
+def main [
+  <span class="Constant">1</span>:address:array:character<span class="Special"> &lt;- </span><span class="Normal">new</span> [a«c]
+  <span class="Constant">2</span>:number<span class="Special"> &lt;- </span>length *<span class="Constant">1</span>:address:array:character
+  <span class="Constant">3</span>:character<span class="Special"> &lt;- </span>index *<span class="Constant">1</span>:address:array:character<span class="Delimiter">,</span> <span class="Constant">1</span>
+]
+<span class="traceContains">+mem: storing 3 in location 2</span>
+<span class="Comment"># unicode for '«'</span>
+<span class="traceContains">+mem: storing 171 in location 3</span>
+
+<span class="Delimiter">:(before &quot;End NEW Check Special-cases&quot;)</span>
+<span class="Normal">if</span> <span class="Delimiter">(</span>is_literal_string<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">)))</span> <span class="Identifier">break</span><span class="Delimiter">;</span>
+<span class="Delimiter">:(before &quot;Convert 'new' To 'allocate'&quot;)</span>
+<span class="Normal">if</span> <span class="Delimiter">(</span>inst<span class="Delimiter">.</span>name == <span class="Constant">&quot;new&quot;</span> &amp;&amp; is_literal_string<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">)))</span> <span class="Identifier">continue</span><span class="Delimiter">;</span>
+<span class="Delimiter">:(after &quot;case NEW&quot; following &quot;Primitive Recipe Implementations&quot;)</span>
+  <span class="Normal">if</span> <span class="Delimiter">(</span>is_literal_string<span class="Delimiter">(</span>current_instruction<span class="Delimiter">().</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">)))</span> <span class="Delimiter">{</span>
+    products<span class="Delimiter">.</span>resize<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">);</span>
+    products<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>push_back<span class="Delimiter">(</span>new_mu_string<span class="Delimiter">(</span>current_instruction<span class="Delimiter">().</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>name<span class="Delimiter">));</span>
+    trace<span class="Delimiter">(</span><span class="Constant">9999</span><span class="Delimiter">,</span> <span class="Constant">&quot;mem&quot;</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;new string alloc: &quot;</span> &lt;&lt; products<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">)</span> &lt;&lt; end<span class="Delimiter">();</span>
+    <span class="Identifier">break</span><span class="Delimiter">;</span>
+  <span class="Delimiter">}</span>
+
+<span class="Delimiter">:(code)</span>
+<span class="Normal">int</span> new_mu_string<span class="Delimiter">(</span><span class="Normal">const</span> string&amp; contents<span class="Delimiter">)</span> <span class="Delimiter">{</span>
+  <span class="Comment">// allocate an array just large enough for it</span>
+  <span class="Normal">int</span> string_length = unicode_length<span class="Delimiter">(</span>contents<span class="Delimiter">);</span>
+<span class="CommentedCode">//?   Total_alloc += string_length+1;</span>
+<span class="CommentedCode">//?   Num_alloc++;</span>
+  ensure_space<span class="Delimiter">(</span>string_length+<span class="Constant">1</span><span class="Delimiter">);</span>  <span class="Comment">// don't forget the extra location for array size</span>
+  <span class="Comment">// initialize string</span>
+  <span class="Normal">int</span> result = Current_routine<span class="Delimiter">-&gt;</span>alloc<span class="Delimiter">;</span>
+  <span class="Comment">// initialize refcount</span>
+  put<span class="Delimiter">(</span>Memory<span class="Delimiter">,</span> Current_routine<span class="Delimiter">-&gt;</span>alloc++<span class="Delimiter">,</span> <span class="Constant">0</span><span class="Delimiter">);</span>
+  <span class="Comment">// store length</span>
+  put<span class="Delimiter">(</span>Memory<span class="Delimiter">,</span> Current_routine<span class="Delimiter">-&gt;</span>alloc++<span class="Delimiter">,</span> string_length<span class="Delimiter">);</span>
+  <span class="Normal">int</span> curr = <span class="Constant">0</span><span class="Delimiter">;</span>
+  <span class="Normal">const</span> <span class="Normal">char</span>* raw_contents = contents<span class="Delimiter">.</span>c_str<span class="Delimiter">();</span>
+  <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span> i &lt; string_length<span class="Delimiter">;</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
+    <span class="Normal">uint32_t</span> curr_character<span class="Delimiter">;</span>
+    assert<span class="Delimiter">(</span>curr &lt; SIZE<span class="Delimiter">(</span>contents<span class="Delimiter">));</span>
+    tb_utf8_char_to_unicode<span class="Delimiter">(</span>&amp;curr_character<span class="Delimiter">,</span> &amp;raw_contents[curr]<span class="Delimiter">);</span>
+    put<span class="Delimiter">(</span>Memory<span class="Delimiter">,</span> Current_routine<span class="Delimiter">-&gt;</span>alloc<span class="Delimiter">,</span> curr_character<span class="Delimiter">);</span>
+    curr += tb_utf8_char_length<span class="Delimiter">(</span>raw_contents[curr]<span class="Delimiter">);</span>
+    ++Current_routine<span class="Delimiter">-&gt;</span>alloc<span class="Delimiter">;</span>
+  <span class="Delimiter">}</span>
+  <span class="Comment">// mu strings are not null-terminated in memory</span>
+  <span class="Identifier">return</span> result<span class="Delimiter">;</span>
+<span class="Delimiter">}</span>
+
+<span class="Comment">//: stash recognizes strings</span>
+
+<span class="Delimiter">:(scenario stash_string)</span>
+def main [
+  <span class="Constant">1</span>:address:array:character<span class="Special"> &lt;- </span><span class="Normal">new</span> [abc]
+  stash [foo:]<span class="Delimiter">,</span> <span class="Constant">1</span>:address:array:character
+]
+<span class="traceContains">+app: foo: abc</span>
+
+<span class="Delimiter">:(before &quot;End print Special-cases(r, data)&quot;)</span>
+<span class="Normal">if</span> <span class="Delimiter">(</span>is_mu_string<span class="Delimiter">(</span>r<span class="Delimiter">))</span> <span class="Delimiter">{</span>
+  assert<span class="Delimiter">(</span>scalar<span class="Delimiter">(</span>data<span class="Delimiter">));</span>
+  <span class="Identifier">return</span> read_mu_string<span class="Delimiter">(</span>data<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">))</span>+<span class="Constant">' '</span><span class="Delimiter">;</span>
+<span class="Delimiter">}</span>
+
+<span class="Delimiter">:(scenario unicode_string)</span>
+def main [
+  <span class="Constant">1</span>:address:array:character<span class="Special"> &lt;- </span><span class="Normal">new</span> [♠]
+  stash [foo:]<span class="Delimiter">,</span> <span class="Constant">1</span>:address:array:character
+]
+<span class="traceContains">+app: foo: ♠</span>
+
+<span class="Delimiter">:(scenario stash_space_after_string)</span>
+def main [
+  <span class="Constant">1</span>:address:array:character<span class="Special"> &lt;- </span><span class="Normal">new</span> [abc]
+  stash <span class="Constant">1</span>:address:array:character<span class="Delimiter">,</span> [foo]
+]
+<span class="traceContains">+app: abc foo</span>
+
+<span class="Comment">//: Allocate more to routine when initializing a literal string</span>
+<span class="Delimiter">:(scenario new_string_overflow)</span>
+<span class="Special">% Initial_memory_per_routine = 2;</span>
+def main [
+  <span class="Constant">1</span>:address:number/<span class="Special">raw &lt;- </span><span class="Normal">new</span> number:type
+  <span class="Constant">2</span>:address:array:character/<span class="Special">raw &lt;- </span><span class="Normal">new</span> [a]  <span class="Comment"># not enough room in initial page, if you take the array size into account</span>
+]
+<span class="traceContains">+new: routine allocated memory from 1000 to 1002</span>
+<span class="traceContains">+new: routine allocated memory from 1002 to 1004</span>
+
+<span class="Comment">//: helpers</span>
+<span class="Delimiter">:(code)</span>
+<span class="Normal">int</span> unicode_length<span class="Delimiter">(</span><span class="Normal">const</span> string&amp; s<span class="Delimiter">)</span> <span class="Delimiter">{</span>
+  <span class="Normal">const</span> <span class="Normal">char</span>* in = s<span class="Delimiter">.</span>c_str<span class="Delimiter">();</span>
+  <span class="Normal">int</span> result = <span class="Constant">0</span><span class="Delimiter">;</span>
+  <span class="Normal">int</span> curr = <span class="Constant">0</span><span class="Delimiter">;</span>
+  <span class="Normal">while</span> <span class="Delimiter">(</span>curr &lt; SIZE<span class="Delimiter">(</span>s<span class="Delimiter">))</span> <span class="Delimiter">{</span>  <span class="Comment">// carefully bounds-check on the string</span>
+    <span class="Comment">// before accessing its raw pointer</span>
+    ++result<span class="Delimiter">;</span>
+    curr += tb_utf8_char_length<span class="Delimiter">(</span>in[curr]<span class="Delimiter">);</span>
+  <span class="Delimiter">}</span>
+  <span class="Identifier">return</span> result<span class="Delimiter">;</span>
+<span class="Delimiter">}</span>
+
+string read_mu_string<span class="Delimiter">(</span><span class="Normal">int</span> address<span class="Delimiter">)</span> <span class="Delimiter">{</span>
+  <span class="Normal">if</span> <span class="Delimiter">(</span>address == <span class="Constant">0</span><span class="Delimiter">)</span> <span class="Identifier">return</span> <span class="Constant">&quot;&quot;</span><span class="Delimiter">;</span>
+  address++<span class="Delimiter">;</span>  <span class="Comment">// skip refcount</span>
+  <span class="Normal">int</span> size = get_or_insert<span class="Delimiter">(</span>Memory<span class="Delimiter">,</span> address<span class="Delimiter">);</span>
+  <span class="Normal">if</span> <span class="Delimiter">(</span>size == <span class="Constant">0</span><span class="Delimiter">)</span> <span class="Identifier">return</span> <span class="Constant">&quot;&quot;</span><span class="Delimiter">;</span>
+  ostringstream tmp<span class="Delimiter">;</span>
+  <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> curr = address+<span class="Constant">1</span><span class="Delimiter">;</span> curr &lt;= address+size<span class="Delimiter">;</span> ++curr<span class="Delimiter">)</span> <span class="Delimiter">{</span>
+    tmp &lt;&lt; to_unicode<span class="Delimiter">(</span><span class="Normal">static_cast</span>&lt;<span class="Normal">uint32_t</span>&gt;<span class="Delimiter">(</span>get_or_insert<span class="Delimiter">(</span>Memory<span class="Delimiter">,</span> curr<span class="Delimiter">)));</span>
+  <span class="Delimiter">}</span>
+  <span class="Identifier">return</span> tmp<span class="Delimiter">.</span>str<span class="Delimiter">();</span>
+<span class="Delimiter">}</span>
+</pre>
+</body>
+</html>
+<!-- vim: set foldmethod=manual : -->
author	Kartik K. Agaram <vc@akkartik.com>	2016-05-21 17:44:53 -0700
committer	Kartik K. Agaram <vc@akkartik.com>	2016-05-21 17:44:53 -0700
commit	2f02189ddcdeb7d25b0ca9bd5b955b764d41a1a7 (patch)
tree	7c2e8b6e37ae3201dc01e90bcb390ee60b7f4a77 /html/038new_text.cc.html
parent	61c025b11ed4ddd002f09f061fd77c75d8b6d0ba (diff)
download	mu-2f02189ddcdeb7d25b0ca9bd5b955b764d41a1a7.tar.gz