about summary refs log tree commit diff stats
path: root/html/100trace_browser.cc.html
diff options
context:
space:
mode:
Diffstat (limited to 'html/100trace_browser.cc.html')
-rw-r--r--html/100trace_browser.cc.html528
1 files changed, 276 insertions, 252 deletions
diff --git a/html/100trace_browser.cc.html b/html/100trace_browser.cc.html
index 53f1e426..c15dae60 100644
--- a/html/100trace_browser.cc.html
+++ b/html/100trace_browser.cc.html
@@ -6,7 +6,7 @@
 <meta name="Generator" content="Vim/7.4">
 <meta name="plugin-version" content="vim7.4_v2">
 <meta name="syntax" content="cpp">
-<meta name="settings" content="use_css,pre_wrap,no_foldcolumn,expand_tabs,prevent_copy=">
+<meta name="settings" content="number_lines,use_css,pre_wrap,no_foldcolumn,expand_tabs,line_ids,prevent_copy=">
 <meta name="colorscheme" content="minimal">
 <style type="text/css">
 <!--
@@ -14,9 +14,10 @@ pre { white-space: pre-wrap; font-family: monospace; color: #eeeeee; background-
 body { font-size: 12pt; font-family: monospace; color: #eeeeee; background-color: #080808; }
 * { font-size: 12pt; font-size: 1em; }
 .Constant { color: #00a0a0; }
+.cSpecial { color: #008000; }
 .Comment { color: #9090ff; }
 .Delimiter { color: #800080; }
-.cSpecial { color: #008000; }
+.LineNr { color: #444444; }
 .Identifier { color: #c0a020; }
 .Normal { color: #eeeeee; background-color: #080808; padding-bottom: 1px; }
 -->
@@ -25,260 +26,283 @@ body { font-size: 12pt; font-family: monospace; color: #eeeeee; background-color
 <script type='text/javascript'>
 <!--
 
+/* function to open any folds containing a jumped-to line before jumping to it */
+function JumpToLine()
+{
+  var lineNum;
+  lineNum = window.location.hash;
+  lineNum = lineNum.substr(1); /* strip off '#' */
+
+  if (lineNum.indexOf('L') == -1) {
+    lineNum = 'L'+lineNum;
+  }
+  lineElem = document.getElementById(lineNum);
+  /* Always jump to new location even if the line was hidden inside a fold, or
+   * we corrected the raw number to a line ID.
+   */
+  if (lineElem) {
+    lineElem.scrollIntoView(true);
+  }
+  return true;
+}
+if ('onhashchange' in window) {
+  window.onhashchange = JumpToLine;
+}
+
 -->
 </script>
 </head>
-<body>
+<body onload='JumpToLine();'>
 <pre id='vimCodeElement'>
-<span class="Comment">//: A debugging helper that lets you zoom in/out on a trace.</span>
-
-<span class="Comment">//: browse the trace we just created</span>
-<span class="Delimiter">:(before &quot;End Primitive Recipe Declarations&quot;)</span>
-_BROWSE_TRACE<span class="Delimiter">,</span>
-<span class="Delimiter">:(before &quot;End Primitive Recipe Numbers&quot;)</span>
-put<span class="Delimiter">(</span>Recipe_ordinal<span class="Delimiter">,</span> <span class="Constant">&quot;$browse-trace&quot;</span><span class="Delimiter">,</span> _BROWSE_TRACE<span class="Delimiter">);</span>
-<span class="Delimiter">:(before &quot;End Primitive Recipe Checks&quot;)</span>
-<span class="Normal">case</span> _BROWSE_TRACE: <span class="Delimiter">{</span>
-  <span class="Identifier">break</span><span class="Delimiter">;</span>
-<span class="Delimiter">}</span>
-<span class="Delimiter">:(before &quot;End Primitive Recipe Implementations&quot;)</span>
-<span class="Normal">case</span> _BROWSE_TRACE: <span class="Delimiter">{</span>
-  start_trace_browser<span class="Delimiter">();</span>
-  <span class="Identifier">break</span><span class="Delimiter">;</span>
-<span class="Delimiter">}</span>
-
-<span class="Comment">//: browse a trace loaded from a file</span>
-<span class="Delimiter">:(after &quot;Commandline Parsing&quot;)</span>
-<span class="Normal">if</span> <span class="Delimiter">(</span>argc == <span class="Constant">3</span> &amp;&amp; is_equal<span class="Delimiter">(</span>argv[<span class="Constant">1</span>]<span class="Delimiter">,</span> <span class="Constant">&quot;browse-trace&quot;</span><span class="Delimiter">))</span> <span class="Delimiter">{</span>
-  load_trace<span class="Delimiter">(</span>argv[<span class="Constant">2</span>]<span class="Delimiter">);</span>
-  start_trace_browser<span class="Delimiter">();</span>
-  <span class="Identifier">return</span> <span class="Constant">0</span><span class="Delimiter">;</span>
-<span class="Delimiter">}</span>
-
-<span class="Delimiter">:(before &quot;End Globals&quot;)</span>
-set&lt;<span class="Normal">int</span>&gt; Visible<span class="Delimiter">;</span>
-<span class="Normal">int</span> Top_of_screen = <span class="Constant">0</span><span class="Delimiter">;</span>
-<span class="Normal">int</span> Last_printed_row = <span class="Constant">0</span><span class="Delimiter">;</span>
-map&lt;<span class="Normal">int</span><span class="Delimiter">,</span> <span class="Normal">int</span>&gt; Trace_index<span class="Delimiter">;</span>  <span class="Comment">// screen row -&gt; trace index</span>
-
-<span class="Delimiter">:(code)</span>
-<span class="Normal">void</span> start_trace_browser<span class="Delimiter">()</span> <span class="Delimiter">{</span>
-  <span class="Normal">if</span> <span class="Delimiter">(</span>!Trace_stream<span class="Delimiter">)</span> <span class="Identifier">return</span><span class="Delimiter">;</span>
-  cerr &lt;&lt; <span class="Constant">&quot;computing min depth to display</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span><span class="Delimiter">;</span>
-  <span class="Normal">int</span> min_depth = <span class="Constant">9999</span><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; SIZE<span class="Delimiter">(</span>Trace_stream<span class="Delimiter">-&gt;</span>past_lines<span class="Delimiter">);</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
-    trace_line&amp; curr_line = Trace_stream<span class="Delimiter">-&gt;</span>past_lines<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">);</span>
-    <span class="Normal">if</span> <span class="Delimiter">(</span>curr_line<span class="Delimiter">.</span>depth &lt; min_depth<span class="Delimiter">)</span> min_depth = curr_line<span class="Delimiter">.</span>depth<span class="Delimiter">;</span>
-  <span class="Delimiter">}</span>
-  cerr &lt;&lt; <span class="Constant">&quot;min depth is &quot;</span> &lt;&lt; min_depth &lt;&lt; <span class="cSpecial">'\n'</span><span class="Delimiter">;</span>
-  cerr &lt;&lt; <span class="Constant">&quot;computing lines to display</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span><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; SIZE<span class="Delimiter">(</span>Trace_stream<span class="Delimiter">-&gt;</span>past_lines<span class="Delimiter">);</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
-    <span class="Normal">if</span> <span class="Delimiter">(</span>Trace_stream<span class="Delimiter">-&gt;</span>past_lines<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>depth == min_depth<span class="Delimiter">)</span>
-      Visible<span class="Delimiter">.</span>insert<span class="Delimiter">(</span>i<span class="Delimiter">);</span>
-  <span class="Delimiter">}</span>
-  tb_init<span class="Delimiter">();</span>
-  Display_row = Display_column = <span class="Constant">0</span><span class="Delimiter">;</span>
-  tb_event event<span class="Delimiter">;</span>
-  Top_of_screen = <span class="Constant">0</span><span class="Delimiter">;</span>
-  refresh_screen_rows<span class="Delimiter">();</span>
-  <span class="Normal">while</span> <span class="Delimiter">(</span><span class="Constant">true</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
-    render<span class="Delimiter">();</span>
-    <span class="Normal">do</span> <span class="Delimiter">{</span>
-      tb_poll_event<span class="Delimiter">(</span>&amp;event<span class="Delimiter">);</span>
-    <span class="Delimiter">}</span> <span class="Normal">while</span> <span class="Delimiter">(</span>event<span class="Delimiter">.</span>type != TB_EVENT_KEY<span class="Delimiter">);</span>
-    <span class="Normal">int</span> key = event<span class="Delimiter">.</span>key ? event<span class="Delimiter">.</span>key : event<span class="Delimiter">.</span>ch<span class="Delimiter">;</span>
-    <span class="Normal">if</span> <span class="Delimiter">(</span>key == <span class="Constant">'q'</span> || key == <span class="Constant">'Q'</span><span class="Delimiter">)</span> <span class="Identifier">break</span><span class="Delimiter">;</span>
-    <span class="Normal">if</span> <span class="Delimiter">(</span>key == <span class="Constant">'j'</span> || key == TB_KEY_ARROW_DOWN<span class="Delimiter">)</span> <span class="Delimiter">{</span>
-      <span class="Comment">// move cursor one line down</span>
-      <span class="Normal">if</span> <span class="Delimiter">(</span>Display_row &lt; Last_printed_row<span class="Delimiter">)</span> ++Display_row<span class="Delimiter">;</span>
-    <span class="Delimiter">}</span>
-    <span class="Normal">if</span> <span class="Delimiter">(</span>key == <span class="Constant">'k'</span> || key == TB_KEY_ARROW_UP<span class="Delimiter">)</span> <span class="Delimiter">{</span>
-      <span class="Comment">// move cursor one line up</span>
-      <span class="Normal">if</span> <span class="Delimiter">(</span>Display_row &gt; <span class="Constant">0</span><span class="Delimiter">)</span> --Display_row<span class="Delimiter">;</span>
-    <span class="Delimiter">}</span>
-    <span class="Normal">if</span> <span class="Delimiter">(</span>key == <span class="Constant">'H'</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
-      <span class="Comment">// move cursor to top of screen</span>
-      Display_row = <span class="Constant">0</span><span class="Delimiter">;</span>
-    <span class="Delimiter">}</span>
-    <span class="Normal">if</span> <span class="Delimiter">(</span>key == <span class="Constant">'M'</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
-      <span class="Comment">// move cursor to center of screen</span>
-      Display_row = tb_height<span class="Delimiter">()</span>/<span class="Constant">2</span><span class="Delimiter">;</span>
-    <span class="Delimiter">}</span>
-    <span class="Normal">if</span> <span class="Delimiter">(</span>key == <span class="Constant">'L'</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
-      <span class="Comment">// move cursor to bottom of screen</span>
-      Display_row = tb_height<span class="Delimiter">()</span>-<span class="Constant">1</span><span class="Delimiter">;</span>
-    <span class="Delimiter">}</span>
-    <span class="Normal">if</span> <span class="Delimiter">(</span>key == <span class="Constant">'J'</span> || key == TB_KEY_PGDN<span class="Delimiter">)</span> <span class="Delimiter">{</span>
-      <span class="Comment">// page-down</span>
-      <span class="Normal">if</span> <span class="Delimiter">(</span>Trace_index<span class="Delimiter">.</span>find<span class="Delimiter">(</span>tb_height<span class="Delimiter">()</span>-<span class="Constant">1</span><span class="Delimiter">)</span> != Trace_index<span class="Delimiter">.</span>end<span class="Delimiter">())</span> <span class="Delimiter">{</span>
-        Top_of_screen = get<span class="Delimiter">(</span>Trace_index<span class="Delimiter">,</span> tb_height<span class="Delimiter">()</span>-<span class="Constant">1</span><span class="Delimiter">)</span> + <span class="Constant">1</span><span class="Delimiter">;</span>
-        refresh_screen_rows<span class="Delimiter">();</span>
-      <span class="Delimiter">}</span>
-    <span class="Delimiter">}</span>
-    <span class="Normal">if</span> <span class="Delimiter">(</span>key == <span class="Constant">'K'</span> || key == TB_KEY_PGUP<span class="Delimiter">)</span> <span class="Delimiter">{</span>
-      <span class="Comment">// page-up is more convoluted</span>
-      <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> screen_row = tb_height<span class="Delimiter">();</span> screen_row &gt; <span class="Constant">0</span> &amp;&amp; Top_of_screen &gt; <span class="Constant">0</span><span class="Delimiter">;</span> --screen_row<span class="Delimiter">)</span> <span class="Delimiter">{</span>
-        --Top_of_screen<span class="Delimiter">;</span>
-        <span class="Normal">if</span> <span class="Delimiter">(</span>Top_of_screen &lt;= <span class="Constant">0</span><span class="Delimiter">)</span> <span class="Identifier">break</span><span class="Delimiter">;</span>
-        <span class="Normal">while</span> <span class="Delimiter">(</span>Top_of_screen &gt; <span class="Constant">0</span> &amp;&amp; !contains_key<span class="Delimiter">(</span>Visible<span class="Delimiter">,</span> Top_of_screen<span class="Delimiter">))</span>
-          --Top_of_screen<span class="Delimiter">;</span>
-      <span class="Delimiter">}</span>
-      <span class="Normal">if</span> <span class="Delimiter">(</span>Top_of_screen &gt;= <span class="Constant">0</span><span class="Delimiter">)</span>
-        refresh_screen_rows<span class="Delimiter">();</span>
-    <span class="Delimiter">}</span>
-    <span class="Normal">if</span> <span class="Delimiter">(</span>key == <span class="Constant">'G'</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
-      <span class="Comment">// go to bottom of screen; largely like page-up, interestingly</span>
-      Top_of_screen = SIZE<span class="Delimiter">(</span>Trace_stream<span class="Delimiter">-&gt;</span>past_lines<span class="Delimiter">)</span>-<span class="Constant">1</span><span class="Delimiter">;</span>
-      <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> screen_row = tb_height<span class="Delimiter">();</span> screen_row &gt; <span class="Constant">0</span> &amp;&amp; Top_of_screen &gt; <span class="Constant">0</span><span class="Delimiter">;</span> --screen_row<span class="Delimiter">)</span> <span class="Delimiter">{</span>
-        --Top_of_screen<span class="Delimiter">;</span>
-        <span class="Normal">if</span> <span class="Delimiter">(</span>Top_of_screen &lt;= <span class="Constant">0</span><span class="Delimiter">)</span> <span class="Identifier">break</span><span class="Delimiter">;</span>
-        <span class="Normal">while</span> <span class="Delimiter">(</span>Top_of_screen &gt; <span class="Constant">0</span> &amp;&amp; !contains_key<span class="Delimiter">(</span>Visible<span class="Delimiter">,</span> Top_of_screen<span class="Delimiter">))</span>
-          --Top_of_screen<span class="Delimiter">;</span>
-      <span class="Delimiter">}</span>
-      refresh_screen_rows<span class="Delimiter">();</span>
-      <span class="Comment">// move cursor to bottom</span>
-      Display_row = Last_printed_row<span class="Delimiter">;</span>
-      refresh_screen_rows<span class="Delimiter">();</span>
-    <span class="Delimiter">}</span>
-    <span class="Normal">if</span> <span class="Delimiter">(</span>key == TB_KEY_CARRIAGE_RETURN<span class="Delimiter">)</span> <span class="Delimiter">{</span>
-      <span class="Comment">// expand lines under current by one level</span>
-      assert<span class="Delimiter">(</span>contains_key<span class="Delimiter">(</span>Trace_index<span class="Delimiter">,</span> Display_row<span class="Delimiter">));</span>
-      <span class="Normal">int</span> start_index = get<span class="Delimiter">(</span>Trace_index<span class="Delimiter">,</span> Display_row<span class="Delimiter">);</span>
-      <span class="Normal">int</span> index = <span class="Constant">0</span><span class="Delimiter">;</span>
-      <span class="Comment">// simultaneously compute end_index and min_depth</span>
-      <span class="Normal">int</span> min_depth = <span class="Constant">9999</span><span class="Delimiter">;</span>
-      <span class="Normal">for</span> <span class="Delimiter">(</span>index = start_index+<span class="Constant">1</span><span class="Delimiter">;</span> index &lt; SIZE<span class="Delimiter">(</span>Trace_stream<span class="Delimiter">-&gt;</span>past_lines<span class="Delimiter">);</span> ++index<span class="Delimiter">)</span> <span class="Delimiter">{</span>
-        <span class="Normal">if</span> <span class="Delimiter">(</span>contains_key<span class="Delimiter">(</span>Visible<span class="Delimiter">,</span> index<span class="Delimiter">))</span> <span class="Identifier">break</span><span class="Delimiter">;</span>
-        trace_line&amp; curr_line = Trace_stream<span class="Delimiter">-&gt;</span>past_lines<span class="Delimiter">.</span>at<span class="Delimiter">(</span>index<span class="Delimiter">);</span>
-        assert<span class="Delimiter">(</span>curr_line<span class="Delimiter">.</span>depth &gt; Trace_stream<span class="Delimiter">-&gt;</span>past_lines<span class="Delimiter">.</span>at<span class="Delimiter">(</span>start_index<span class="Delimiter">).</span>depth<span class="Delimiter">);</span>
-        <span class="Normal">if</span> <span class="Delimiter">(</span>curr_line<span class="Delimiter">.</span>depth &lt; min_depth<span class="Delimiter">)</span> min_depth = curr_line<span class="Delimiter">.</span>depth<span class="Delimiter">;</span>
-      <span class="Delimiter">}</span>
-      <span class="Normal">int</span> end_index = index<span class="Delimiter">;</span>
-      <span class="Comment">// mark as visible all intervening indices at min_depth</span>
-      <span class="Normal">for</span> <span class="Delimiter">(</span>index = start_index<span class="Delimiter">;</span> index &lt; end_index<span class="Delimiter">;</span> ++index<span class="Delimiter">)</span> <span class="Delimiter">{</span>
-        trace_line&amp; curr_line = Trace_stream<span class="Delimiter">-&gt;</span>past_lines<span class="Delimiter">.</span>at<span class="Delimiter">(</span>index<span class="Delimiter">);</span>
-        <span class="Normal">if</span> <span class="Delimiter">(</span>curr_line<span class="Delimiter">.</span>depth == min_depth<span class="Delimiter">)</span> <span class="Delimiter">{</span>
-          Visible<span class="Delimiter">.</span>insert<span class="Delimiter">(</span>index<span class="Delimiter">);</span>
-        <span class="Delimiter">}</span>
-      <span class="Delimiter">}</span>
-      refresh_screen_rows<span class="Delimiter">();</span>
-    <span class="Delimiter">}</span>
-    <span class="Normal">if</span> <span class="Delimiter">(</span>key == TB_KEY_BACKSPACE || key == TB_KEY_BACKSPACE2<span class="Delimiter">)</span> <span class="Delimiter">{</span>
-      <span class="Comment">// collapse all lines under current</span>
-      assert<span class="Delimiter">(</span>contains_key<span class="Delimiter">(</span>Trace_index<span class="Delimiter">,</span> Display_row<span class="Delimiter">));</span>
-      <span class="Normal">int</span> start_index = get<span class="Delimiter">(</span>Trace_index<span class="Delimiter">,</span> Display_row<span class="Delimiter">);</span>
-      <span class="Normal">int</span> index = <span class="Constant">0</span><span class="Delimiter">;</span>
-      <span class="Comment">// end_index is the next line at a depth same as or lower than start_index</span>
-      <span class="Normal">int</span> initial_depth = Trace_stream<span class="Delimiter">-&gt;</span>past_lines<span class="Delimiter">.</span>at<span class="Delimiter">(</span>start_index<span class="Delimiter">).</span>depth<span class="Delimiter">;</span>
-      <span class="Normal">for</span> <span class="Delimiter">(</span>index = start_index+<span class="Constant">1</span><span class="Delimiter">;</span> index &lt; SIZE<span class="Delimiter">(</span>Trace_stream<span class="Delimiter">-&gt;</span>past_lines<span class="Delimiter">);</span> ++index<span class="Delimiter">)</span> <span class="Delimiter">{</span>
-        <span class="Normal">if</span> <span class="Delimiter">(</span>!contains_key<span class="Delimiter">(</span>Visible<span class="Delimiter">,</span> index<span class="Delimiter">))</span> <span class="Identifier">continue</span><span class="Delimiter">;</span>
-        trace_line&amp; curr_line = Trace_stream<span class="Delimiter">-&gt;</span>past_lines<span class="Delimiter">.</span>at<span class="Delimiter">(</span>index<span class="Delimiter">);</span>
-        <span class="Normal">if</span> <span class="Delimiter">(</span>curr_line<span class="Delimiter">.</span>depth &lt;= initial_depth<span class="Delimiter">)</span> <span class="Identifier">break</span><span class="Delimiter">;</span>
-      <span class="Delimiter">}</span>
-      <span class="Normal">int</span> end_index = index<span class="Delimiter">;</span>
-      <span class="Comment">// mark as visible all intervening indices at min_depth</span>
-      <span class="Normal">for</span> <span class="Delimiter">(</span>index = start_index+<span class="Constant">1</span><span class="Delimiter">;</span> index &lt; end_index<span class="Delimiter">;</span> ++index<span class="Delimiter">)</span> <span class="Delimiter">{</span>
-        Visible<span class="Delimiter">.</span>erase<span class="Delimiter">(</span>index<span class="Delimiter">);</span>
-      <span class="Delimiter">}</span>
-      refresh_screen_rows<span class="Delimiter">();</span>
-    <span class="Delimiter">}</span>
-  <span class="Delimiter">}</span>
-  tb_shutdown<span class="Delimiter">();</span>
-<span class="Delimiter">}</span>
-
-<span class="Comment">// update Trace_indices for each screen_row on the basis of Top_of_screen and Visible</span>
-<span class="Normal">void</span> refresh_screen_rows<span class="Delimiter">()</span> <span class="Delimiter">{</span>
-  <span class="Normal">int</span> screen_row = <span class="Constant">0</span><span class="Delimiter">,</span> index = <span class="Constant">0</span><span class="Delimiter">;</span>
-  Trace_index<span class="Delimiter">.</span>clear<span class="Delimiter">();</span>
-  <span class="Normal">for</span> <span class="Delimiter">(</span>screen_row = <span class="Constant">0</span><span class="Delimiter">,</span> index = Top_of_screen<span class="Delimiter">;</span> screen_row &lt; tb_height<span class="Delimiter">()</span> &amp;&amp; index &lt; SIZE<span class="Delimiter">(</span>Trace_stream<span class="Delimiter">-&gt;</span>past_lines<span class="Delimiter">);</span> ++screen_row<span class="Delimiter">,</span> ++index<span class="Delimiter">)</span> <span class="Delimiter">{</span>
-    <span class="Comment">// skip lines without depth for now</span>
-    <span class="Normal">while</span> <span class="Delimiter">(</span>!contains_key<span class="Delimiter">(</span>Visible<span class="Delimiter">,</span> index<span class="Delimiter">))</span> <span class="Delimiter">{</span>
-      ++index<span class="Delimiter">;</span>
-      <span class="Normal">if</span> <span class="Delimiter">(</span>index &gt;= SIZE<span class="Delimiter">(</span>Trace_stream<span class="Delimiter">-&gt;</span>past_lines<span class="Delimiter">))</span> <span class="Identifier">goto</span> done<span class="Delimiter">;</span>
-    <span class="Delimiter">}</span>
-    assert<span class="Delimiter">(</span>index &lt; SIZE<span class="Delimiter">(</span>Trace_stream<span class="Delimiter">-&gt;</span>past_lines<span class="Delimiter">));</span>
-    put<span class="Delimiter">(</span>Trace_index<span class="Delimiter">,</span> screen_row<span class="Delimiter">,</span> index<span class="Delimiter">);</span>
-  <span class="Delimiter">}</span>
-<span class="Normal">done</span>:<span class="Delimiter">;</span>
-<span class="Delimiter">}</span>
-
-<span class="Normal">void</span> render<span class="Delimiter">()</span> <span class="Delimiter">{</span>
-  <span class="Normal">int</span> screen_row = <span class="Constant">0</span><span class="Delimiter">;</span>
-  <span class="Normal">for</span> <span class="Delimiter">(</span>screen_row = <span class="Constant">0</span><span class="Delimiter">;</span> screen_row &lt; tb_height<span class="Delimiter">();</span> ++screen_row<span class="Delimiter">)</span> <span class="Delimiter">{</span>
-    <span class="Normal">if</span> <span class="Delimiter">(</span>!contains_key<span class="Delimiter">(</span>Trace_index<span class="Delimiter">,</span> screen_row<span class="Delimiter">))</span> <span class="Identifier">break</span><span class="Delimiter">;</span>
-    trace_line&amp; curr_line = Trace_stream<span class="Delimiter">-&gt;</span>past_lines<span class="Delimiter">.</span>at<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Trace_index<span class="Delimiter">,</span> screen_row<span class="Delimiter">));</span>
-    ostringstream out<span class="Delimiter">;</span>
-    out &lt;&lt; std::setw<span class="Delimiter">(</span><span class="Constant">4</span><span class="Delimiter">)</span> &lt;&lt; curr_line<span class="Delimiter">.</span>depth &lt;&lt; <span class="Constant">' '</span> &lt;&lt; curr_line<span class="Delimiter">.</span>label &lt;&lt; <span class="Constant">&quot;: &quot;</span> &lt;&lt; curr_line<span class="Delimiter">.</span>contents<span class="Delimiter">;</span>
-    <span class="Normal">if</span> <span class="Delimiter">(</span>screen_row &lt; tb_height<span class="Delimiter">()</span>-<span class="Constant">1</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
-      <span class="Normal">int</span> delta = lines_hidden<span class="Delimiter">(</span>screen_row<span class="Delimiter">);</span>
-      <span class="Comment">// home-brew escape sequence for red</span>
-      <span class="Normal">if</span> <span class="Delimiter">(</span>delta &gt; <span class="Constant">999</span><span class="Delimiter">)</span> out &lt;&lt; <span class="Normal">static_cast</span>&lt;<span class="Normal">char</span>&gt;<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">);</span>
-      out &lt;&lt; <span class="Constant">&quot; (&quot;</span> &lt;&lt; delta &lt;&lt; <span class="Constant">&quot;)&quot;</span><span class="Delimiter">;</span>
-      <span class="Normal">if</span> <span class="Delimiter">(</span>delta &gt; <span class="Constant">999</span><span class="Delimiter">)</span> out &lt;&lt; <span class="Normal">static_cast</span>&lt;<span class="Normal">char</span>&gt;<span class="Delimiter">(</span><span class="Constant">2</span><span class="Delimiter">);</span>
-    <span class="Delimiter">}</span>
-    render_line<span class="Delimiter">(</span>screen_row<span class="Delimiter">,</span> out<span class="Delimiter">.</span>str<span class="Delimiter">());</span>
-  <span class="Delimiter">}</span>
-  <span class="Comment">// clear rest of screen</span>
-  Last_printed_row = screen_row-<span class="Constant">1</span><span class="Delimiter">;</span>
-  <span class="Normal">for</span> <span class="Delimiter">(;</span> screen_row &lt; tb_height<span class="Delimiter">();</span> ++screen_row<span class="Delimiter">)</span> <span class="Delimiter">{</span>
-    render_line<span class="Delimiter">(</span>screen_row<span class="Delimiter">,</span> <span class="Constant">&quot;~&quot;</span><span class="Delimiter">);</span>
-  <span class="Delimiter">}</span>
-  <span class="Comment">// move cursor back to display row at the end</span>
-  tb_set_cursor<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">,</span> Display_row<span class="Delimiter">);</span>
-  tb_present<span class="Delimiter">();</span>
-<span class="Delimiter">}</span>
-
-<span class="Normal">int</span> lines_hidden<span class="Delimiter">(</span><span class="Normal">int</span> screen_row<span class="Delimiter">)</span> <span class="Delimiter">{</span>
-  assert<span class="Delimiter">(</span>contains_key<span class="Delimiter">(</span>Trace_index<span class="Delimiter">,</span> screen_row<span class="Delimiter">));</span>
-  <span class="Normal">if</span> <span class="Delimiter">(</span>!contains_key<span class="Delimiter">(</span>Trace_index<span class="Delimiter">,</span> screen_row+<span class="Constant">1</span><span class="Delimiter">))</span>
-    <span class="Identifier">return</span> SIZE<span class="Delimiter">(</span>Trace_stream<span class="Delimiter">-&gt;</span>past_lines<span class="Delimiter">)</span> - get<span class="Delimiter">(</span>Trace_index<span class="Delimiter">,</span> screen_row<span class="Delimiter">);</span>
-  <span class="Normal">else</span>
-    <span class="Identifier">return</span> get<span class="Delimiter">(</span>Trace_index<span class="Delimiter">,</span> screen_row+<span class="Constant">1</span><span class="Delimiter">)</span> - get<span class="Delimiter">(</span>Trace_index<span class="Delimiter">,</span> screen_row<span class="Delimiter">);</span>
-<span class="Delimiter">}</span>
-
-<span class="Normal">void</span> render_line<span class="Delimiter">(</span><span class="Normal">int</span> screen_row<span class="Delimiter">,</span> <span class="Normal">const</span> string&amp; s<span class="Delimiter">)</span> <span class="Delimiter">{</span>
-  <span class="Normal">int</span> col = <span class="Constant">0</span><span class="Delimiter">;</span>
-  <span class="Normal">int</span> color = TB_WHITE<span class="Delimiter">;</span>
-  <span class="Normal">for</span> <span class="Delimiter">(</span>col = <span class="Constant">0</span><span class="Delimiter">;</span> col &lt; tb_width<span class="Delimiter">()</span> &amp;&amp; col &lt; SIZE<span class="Delimiter">(</span>s<span class="Delimiter">);</span> ++col<span class="Delimiter">)</span> <span class="Delimiter">{</span>
-    <span class="Normal">char</span> c = s<span class="Delimiter">.</span>at<span class="Delimiter">(</span>col<span class="Delimiter">);</span>  <span class="Comment">// todo: unicode</span>
-    <span class="Normal">if</span> <span class="Delimiter">(</span>c == <span class="cSpecial">'\n'</span><span class="Delimiter">)</span> c = <span class="Constant">';'</span><span class="Delimiter">;</span>  <span class="Comment">// replace newlines with semi-colons</span>
-    <span class="Comment">// escapes. hack: can't start a line with them.</span>
-    <span class="Normal">if</span> <span class="Delimiter">(</span>c == <span class="cSpecial">'\1'</span><span class="Delimiter">)</span> <span class="Delimiter">{</span> color = <span class="Comment">/*</span><span class="Comment">red</span><span class="Comment">*/</span><span class="Constant">1</span><span class="Delimiter">;</span> c = <span class="Constant">' '</span><span class="Delimiter">;</span> <span class="Delimiter">}</span>
-    <span class="Normal">if</span> <span class="Delimiter">(</span>c == <span class="cSpecial">'\2'</span><span class="Delimiter">)</span> <span class="Delimiter">{</span> color = TB_WHITE<span class="Delimiter">;</span> c = <span class="Constant">' '</span><span class="Delimiter">;</span> <span class="Delimiter">}</span>
-    tb_change_cell<span class="Delimiter">(</span>col<span class="Delimiter">,</span> screen_row<span class="Delimiter">,</span> c<span class="Delimiter">,</span> color<span class="Delimiter">,</span> TB_BLACK<span class="Delimiter">);</span>
-  <span class="Delimiter">}</span>
-  <span class="Normal">for</span> <span class="Delimiter">(;</span> col &lt; tb_width<span class="Delimiter">();</span> ++col<span class="Delimiter">)</span> <span class="Delimiter">{</span>
-    tb_change_cell<span class="Delimiter">(</span>col<span class="Delimiter">,</span> screen_row<span class="Delimiter">,</span> <span class="Constant">' '</span><span class="Delimiter">,</span> TB_WHITE<span class="Delimiter">,</span> TB_BLACK<span class="Delimiter">);</span>
-  <span class="Delimiter">}</span>
-<span class="Delimiter">}</span>
-
-<span class="Normal">void</span> load_trace<span class="Delimiter">(</span><span class="Normal">const</span> <span class="Normal">char</span>* filename<span class="Delimiter">)</span> <span class="Delimiter">{</span>
-  ifstream tin<span class="Delimiter">(</span>filename<span class="Delimiter">);</span>
-  <span class="Normal">if</span> <span class="Delimiter">(</span>!tin<span class="Delimiter">)</span> <span class="Delimiter">{</span>
-    cerr &lt;&lt; <span class="Constant">&quot;no such file: &quot;</span> &lt;&lt; filename &lt;&lt; <span class="cSpecial">'\n'</span><span class="Delimiter">;</span>
-    exit<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">);</span>
-  <span class="Delimiter">}</span>
-  Trace_stream = <span class="Normal">new</span> trace_stream<span class="Delimiter">;</span>
-  <span class="Normal">while</span> <span class="Delimiter">(</span>has_data<span class="Delimiter">(</span>tin<span class="Delimiter">))</span> <span class="Delimiter">{</span>
-    tin &gt;&gt; std::noskipws<span class="Delimiter">;</span>
-      skip_whitespace_but_not_newline<span class="Delimiter">(</span>tin<span class="Delimiter">);</span>
-      <span class="Normal">if</span> <span class="Delimiter">(</span>!isdigit<span class="Delimiter">(</span>tin<span class="Delimiter">.</span>peek<span class="Delimiter">()))</span> <span class="Delimiter">{</span>
-        string dummy<span class="Delimiter">;</span>
-        getline<span class="Delimiter">(</span>tin<span class="Delimiter">,</span> dummy<span class="Delimiter">);</span>
-        <span class="Identifier">continue</span><span class="Delimiter">;</span>
-      <span class="Delimiter">}</span>
-    tin &gt;&gt; std::skipws<span class="Delimiter">;</span>
-    <span class="Normal">int</span> depth<span class="Delimiter">;</span>
-    tin &gt;&gt; depth<span class="Delimiter">;</span>
-    string label<span class="Delimiter">;</span>
-    tin &gt;&gt; label<span class="Delimiter">;</span>
-    <span class="Normal">if</span> <span class="Delimiter">(</span>*--label<span class="Delimiter">.</span>end<span class="Delimiter">()</span> == <span class="Constant">':'</span><span class="Delimiter">)</span> label<span class="Delimiter">.</span>erase<span class="Delimiter">(</span>--label<span class="Delimiter">.</span>end<span class="Delimiter">());</span>
-    string line<span class="Delimiter">;</span>
-    getline<span class="Delimiter">(</span>tin<span class="Delimiter">,</span> line<span class="Delimiter">);</span>
-    Trace_stream<span class="Delimiter">-&gt;</span>past_lines<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>trace_line<span class="Delimiter">(</span>depth<span class="Delimiter">,</span> label<span class="Delimiter">,</span> line<span class="Delimiter">));</span>
-  <span class="Delimiter">}</span>
-  cerr &lt;&lt; <span class="Constant">&quot;lines read: &quot;</span> &lt;&lt; Trace_stream<span class="Delimiter">-&gt;</span>past_lines<span class="Delimiter">.</span>size<span class="Delimiter">()</span> &lt;&lt; <span class="cSpecial">'\n'</span><span class="Delimiter">;</span>
-<span class="Delimiter">}</span>
+<a name="L1"></a><span id="L1" class="LineNr">  1 </span><span class="Comment">//: A debugging helper that lets you zoom in/out on a trace.</span>
+<a name="L2"></a><span id="L2" class="LineNr">  2 </span>
+<a name="L3"></a><span id="L3" class="LineNr">  3 </span><span class="Comment">//: browse the trace we just created</span>
+<a name="L4"></a><span id="L4" class="LineNr">  4 </span><span class="Delimiter">:(before &quot;End Primitive Recipe Declarations&quot;)</span>
+<a name="L5"></a><span id="L5" class="LineNr">  5 </span>_BROWSE_TRACE<span class="Delimiter">,</span>
+<a name="L6"></a><span id="L6" class="LineNr">  6 </span><span class="Delimiter">:(before &quot;End Primitive Recipe Numbers&quot;)</span>
+<a name="L7"></a><span id="L7" class="LineNr">  7 </span>put<span class="Delimiter">(</span>Recipe_ordinal<span class="Delimiter">,</span> <span class="Constant">&quot;$browse-trace&quot;</span><span class="Delimiter">,</span> _BROWSE_TRACE<span class="Delimiter">);</span>
+<a name="L8"></a><span id="L8" class="LineNr">  8 </span><span class="Delimiter">:(before &quot;End Primitive Recipe Checks&quot;)</span>
+<a name="L9"></a><span id="L9" class="LineNr">  9 </span><span class="Normal">case</span> _BROWSE_TRACE: <span class="Delimiter">{</span>
+<a name="L10"></a><span id="L10" class="LineNr"> 10 </span>  <span class="Identifier">break</span><span class="Delimiter">;</span>
+<a name="L11"></a><span id="L11" class="LineNr"> 11 </span><span class="Delimiter">}</span>
+<a name="L12"></a><span id="L12" class="LineNr"> 12 </span><span class="Delimiter">:(before &quot;End Primitive Recipe Implementations&quot;)</span>
+<a name="L13"></a><span id="L13" class="LineNr"> 13 </span><span class="Normal">case</span> _BROWSE_TRACE: <span class="Delimiter">{</span>
+<a name="L14"></a><span id="L14" class="LineNr"> 14 </span>  start_trace_browser<span class="Delimiter">();</span>
+<a name="L15"></a><span id="L15" class="LineNr"> 15 </span>  <span class="Identifier">break</span><span class="Delimiter">;</span>
+<a name="L16"></a><span id="L16" class="LineNr"> 16 </span><span class="Delimiter">}</span>
+<a name="L17"></a><span id="L17" class="LineNr"> 17 </span>
+<a name="L18"></a><span id="L18" class="LineNr"> 18 </span><span class="Comment">//: browse a trace loaded from a file</span>
+<a name="L19"></a><span id="L19" class="LineNr"> 19 </span><span class="Delimiter">:(after &quot;Commandline Parsing&quot;)</span>
+<a name="L20"></a><span id="L20" class="LineNr"> 20 </span><span class="Normal">if</span> <span class="Delimiter">(</span>argc == <span class="Constant">3</span> &amp;&amp; is_equal<span class="Delimiter">(</span>argv[<span class="Constant">1</span>]<span class="Delimiter">,</span> <span class="Constant">&quot;browse-trace&quot;</span><span class="Delimiter">))</span> <span class="Delimiter">{</span>
+<a name="L21"></a><span id="L21" class="LineNr"> 21 </span>  load_trace<span class="Delimiter">(</span>argv[<span class="Constant">2</span>]<span class="Delimiter">);</span>
+<a name="L22"></a><span id="L22" class="LineNr"> 22 </span>  start_trace_browser<span class="Delimiter">();</span>
+<a name="L23"></a><span id="L23" class="LineNr"> 23 </span>  <span class="Identifier">return</span> <span class="Constant">0</span><span class="Delimiter">;</span>
+<a name="L24"></a><span id="L24" class="LineNr"> 24 </span><span class="Delimiter">}</span>
+<a name="L25"></a><span id="L25" class="LineNr"> 25 </span>
+<a name="L26"></a><span id="L26" class="LineNr"> 26 </span><span class="Delimiter">:(before &quot;End Globals&quot;)</span>
+<a name="L27"></a><span id="L27" class="LineNr"> 27 </span>set&lt;<span class="Normal">int</span>&gt; Visible<span class="Delimiter">;</span>
+<a name="L28"></a><span id="L28" class="LineNr"> 28 </span><span class="Normal">int</span> Top_of_screen = <span class="Constant">0</span><span class="Delimiter">;</span>
+<a name="L29"></a><span id="L29" class="LineNr"> 29 </span><span class="Normal">int</span> Last_printed_row = <span class="Constant">0</span><span class="Delimiter">;</span>
+<a name="L30"></a><span id="L30" class="LineNr"> 30 </span>map&lt;<span class="Normal">int</span><span class="Delimiter">,</span> <span class="Normal">int</span>&gt; Trace_index<span class="Delimiter">;</span>  <span class="Comment">// screen row -&gt; trace index</span>
+<a name="L31"></a><span id="L31" class="LineNr"> 31 </span>
+<a name="L32"></a><span id="L32" class="LineNr"> 32 </span><span class="Delimiter">:(code)</span>
+<a name="L33"></a><span id="L33" class="LineNr"> 33 </span><span class="Normal">void</span> start_trace_browser<span class="Delimiter">()</span> <span class="Delimiter">{</span>
+<a name="L34"></a><span id="L34" class="LineNr"> 34 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>!Trace_stream<span class="Delimiter">)</span> <span class="Identifier">return</span><span class="Delimiter">;</span>
+<a name="L35"></a><span id="L35" class="LineNr"> 35 </span>  cerr &lt;&lt; <span class="Constant">&quot;computing min depth to display</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span><span class="Delimiter">;</span>
+<a name="L36"></a><span id="L36" class="LineNr"> 36 </span>  <span class="Normal">int</span> min_depth = <span class="Constant">9999</span><span class="Delimiter">;</span>
+<a name="L37"></a><span id="L37" class="LineNr"> 37 </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; SIZE<span class="Delimiter">(</span>Trace_stream<span class="Delimiter">-&gt;</span>past_lines<span class="Delimiter">);</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
+<a name="L38"></a><span id="L38" class="LineNr"> 38 </span>    trace_line&amp; curr_line = Trace_stream<span class="Delimiter">-&gt;</span>past_lines<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">);</span>
+<a name="L39"></a><span id="L39" class="LineNr"> 39 </span>    <span class="Normal">if</span> <span class="Delimiter">(</span>curr_line<span class="Delimiter">.</span>depth &lt; min_depth<span class="Delimiter">)</span> min_depth = curr_line<span class="Delimiter">.</span>depth<span class="Delimiter">;</span>
+<a name="L40"></a><span id="L40" class="LineNr"> 40 </span>  <span class="Delimiter">}</span>
+<a name="L41"></a><span id="L41" class="LineNr"> 41 </span>  cerr &lt;&lt; <span class="Constant">&quot;min depth is &quot;</span> &lt;&lt; min_depth &lt;&lt; <span class="cSpecial">'\n'</span><span class="Delimiter">;</span>
+<a name="L42"></a><span id="L42" class="LineNr"> 42 </span>  cerr &lt;&lt; <span class="Constant">&quot;computing lines to display</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span><span class="Delimiter">;</span>
+<a name="L43"></a><span id="L43" class="LineNr"> 43 </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; SIZE<span class="Delimiter">(</span>Trace_stream<span class="Delimiter">-&gt;</span>past_lines<span class="Delimiter">);</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
+<a name="L44"></a><span id="L44" class="LineNr"> 44 </span>    <span class="Normal">if</span> <span class="Delimiter">(</span>Trace_stream<span class="Delimiter">-&gt;</span>past_lines<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>depth == min_depth<span class="Delimiter">)</span>
+<a name="L45"></a><span id="L45" class="LineNr"> 45 </span>      Visible<span class="Delimiter">.</span>insert<span class="Delimiter">(</span>i<span class="Delimiter">);</span>
+<a name="L46"></a><span id="L46" class="LineNr"> 46 </span>  <span class="Delimiter">}</span>
+<a name="L47"></a><span id="L47" class="LineNr"> 47 </span>  tb_init<span class="Delimiter">();</span>
+<a name="L48"></a><span id="L48" class="LineNr"> 48 </span>  Display_row = Display_column = <span class="Constant">0</span><span class="Delimiter">;</span>
+<a name="L49"></a><span id="L49" class="LineNr"> 49 </span>  tb_event event<span class="Delimiter">;</span>
+<a name="L50"></a><span id="L50" class="LineNr"> 50 </span>  Top_of_screen = <span class="Constant">0</span><span class="Delimiter">;</span>
+<a name="L51"></a><span id="L51" class="LineNr"> 51 </span>  refresh_screen_rows<span class="Delimiter">();</span>
+<a name="L52"></a><span id="L52" class="LineNr"> 52 </span>  <span class="Normal">while</span> <span class="Delimiter">(</span><span class="Constant">true</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
+<a name="L53"></a><span id="L53" class="LineNr"> 53 </span>    render<span class="Delimiter">();</span>
+<a name="L54"></a><span id="L54" class="LineNr"> 54 </span>    <span class="Normal">do</span> <span class="Delimiter">{</span>
+<a name="L55"></a><span id="L55" class="LineNr"> 55 </span>      tb_poll_event<span class="Delimiter">(</span>&amp;event<span class="Delimiter">);</span>
+<a name="L56"></a><span id="L56" class="LineNr"> 56 </span>    <span class="Delimiter">}</span> <span class="Normal">while</span> <span class="Delimiter">(</span>event<span class="Delimiter">.</span>type != TB_EVENT_KEY<span class="Delimiter">);</span>
+<a name="L57"></a><span id="L57" class="LineNr"> 57 </span>    <span class="Normal">int</span> key = event<span class="Delimiter">.</span>key ? event<span class="Delimiter">.</span>key : event<span class="Delimiter">.</span>ch<span class="Delimiter">;</span>
+<a name="L58"></a><span id="L58" class="LineNr"> 58 </span>    <span class="Normal">if</span> <span class="Delimiter">(</span>key == <span class="Constant">'q'</span> || key == <span class="Constant">'Q'</span><span class="Delimiter">)</span> <span class="Identifier">break</span><span class="Delimiter">;</span>
+<a name="L59"></a><span id="L59" class="LineNr"> 59 </span>    <span class="Normal">if</span> <span class="Delimiter">(</span>key == <span class="Constant">'j'</span> || key == TB_KEY_ARROW_DOWN<span class="Delimiter">)</span> <span class="Delimiter">{</span>
+<a name="L60"></a><span id="L60" class="LineNr"> 60 </span>      <span class="Comment">// move cursor one line down</span>
+<a name="L61"></a><span id="L61" class="LineNr"> 61 </span>      <span class="Normal">if</span> <span class="Delimiter">(</span>Display_row &lt; Last_printed_row<span class="Delimiter">)</span> ++Display_row<span class="Delimiter">;</span>
+<a name="L62"></a><span id="L62" class="LineNr"> 62 </span>    <span class="Delimiter">}</span>
+<a name="L63"></a><span id="L63" class="LineNr"> 63 </span>    <span class="Normal">if</span> <span class="Delimiter">(</span>key == <span class="Constant">'k'</span> || key == TB_KEY_ARROW_UP<span class="Delimiter">)</span> <span class="Delimiter">{</span>
+<a name="L64"></a><span id="L64" class="LineNr"> 64 </span>      <span class="Comment">// move cursor one line up</span>
+<a name="L65"></a><span id="L65" class="LineNr"> 65 </span>      <span class="Normal">if</span> <span class="Delimiter">(</span>Display_row &gt; <span class="Constant">0</span><span class="Delimiter">)</span> --Display_row<span class="Delimiter">;</span>
+<a name="L66"></a><span id="L66" class="LineNr"> 66 </span>    <span class="Delimiter">}</span>
+<a name="L67"></a><span id="L67" class="LineNr"> 67 </span>    <span class="Normal">if</span> <span class="Delimiter">(</span>key == <span class="Constant">'H'</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
+<a name="L68"></a><span id="L68" class="LineNr"> 68 </span>      <span class="Comment">// move cursor to top of screen</span>
+<a name="L69"></a><span id="L69" class="LineNr"> 69 </span>      Display_row = <span class="Constant">0</span><span class="Delimiter">;</span>
+<a name="L70"></a><span id="L70" class="LineNr"> 70 </span>    <span class="Delimiter">}</span>
+<a name="L71"></a><span id="L71" class="LineNr"> 71 </span>    <span class="Normal">if</span> <span class="Delimiter">(</span>key == <span class="Constant">'M'</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
+<a name="L72"></a><span id="L72" class="LineNr"> 72 </span>      <span class="Comment">// move cursor to center of screen</span>
+<a name="L73"></a><span id="L73" class="LineNr"> 73 </span>      Display_row = tb_height<span class="Delimiter">()</span>/<span class="Constant">2</span><span class="Delimiter">;</span>
+<a name="L74"></a><span id="L74" class="LineNr"> 74 </span>    <span class="Delimiter">}</span>
+<a name="L75"></a><span id="L75" class="LineNr"> 75 </span>    <span class="Normal">if</span> <span class="Delimiter">(</span>key == <span class="Constant">'L'</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
+<a name="L76"></a><span id="L76" class="LineNr"> 76 </span>      <span class="Comment">// move cursor to bottom of screen</span>
+<a name="L77"></a><span id="L77" class="LineNr"> 77 </span>      Display_row = tb_height<span class="Delimiter">()</span>-<span class="Constant">1</span><span class="Delimiter">;</span>
+<a name="L78"></a><span id="L78" class="LineNr"> 78 </span>    <span class="Delimiter">}</span>
+<a name="L79"></a><span id="L79" class="LineNr"> 79 </span>    <span class="Normal">if</span> <span class="Delimiter">(</span>key == <span class="Constant">'J'</span> || key == TB_KEY_PGDN<span class="Delimiter">)</span> <span class="Delimiter">{</span>
+<a name="L80"></a><span id="L80" class="LineNr"> 80 </span>      <span class="Comment">// page-down</span>
+<a name="L81"></a><span id="L81" class="LineNr"> 81 </span>      <span class="Normal">if</span> <span class="Delimiter">(</span>Trace_index<span class="Delimiter">.</span>find<span class="Delimiter">(</span>tb_height<span class="Delimiter">()</span>-<span class="Constant">1</span><span class="Delimiter">)</span> != Trace_index<span class="Delimiter">.</span>end<span class="Delimiter">())</span> <span class="Delimiter">{</span>
+<a name="L82"></a><span id="L82" class="LineNr"> 82 </span>        Top_of_screen = get<span class="Delimiter">(</span>Trace_index<span class="Delimiter">,</span> tb_height<span class="Delimiter">()</span>-<span class="Constant">1</span><span class="Delimiter">)</span> + <span class="Constant">1</span><span class="Delimiter">;</span>
+<a name="L83"></a><span id="L83" class="LineNr"> 83 </span>        refresh_screen_rows<span class="Delimiter">();</span>
+<a name="L84"></a><span id="L84" class="LineNr"> 84 </span>      <span class="Delimiter">}</span>
+<a name="L85"></a><span id="L85" class="LineNr"> 85 </span>    <span class="Delimiter">}</span>
+<a name="L86"></a><span id="L86" class="LineNr"> 86 </span>    <span class="Normal">if</span> <span class="Delimiter">(</span>key == <span class="Constant">'K'</span> || key == TB_KEY_PGUP<span class="Delimiter">)</span> <span class="Delimiter">{</span>
+<a name="L87"></a><span id="L87" class="LineNr"> 87 </span>      <span class="Comment">// page-up is more convoluted</span>
+<a name="L88"></a><span id="L88" class="LineNr"> 88 </span>      <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> screen_row = tb_height<span class="Delimiter">();</span> screen_row &gt; <span class="Constant">0</span> &amp;&amp; Top_of_screen &gt; <span class="Constant">0</span><span class="Delimiter">;</span> --screen_row<span class="Delimiter">)</span> <span class="Delimiter">{</span>
+<a name="L89"></a><span id="L89" class="LineNr"> 89 </span>        --Top_of_screen<span class="Delimiter">;</span>
+<a name="L90"></a><span id="L90" class="LineNr"> 90 </span>        <span class="Normal">if</span> <span class="Delimiter">(</span>Top_of_screen &lt;= <span class="Constant">0</span><span class="Delimiter">)</span> <span class="Identifier">break</span><span class="Delimiter">;</span>
+<a name="L91"></a><span id="L91" class="LineNr"> 91 </span>        <span class="Normal">while</span> <span class="Delimiter">(</span>Top_of_screen &gt; <span class="Constant">0</span> &amp;&amp; !contains_key<span class="Delimiter">(</span>Visible<span class="Delimiter">,</span> Top_of_screen<span class="Delimiter">))</span>
+<a name="L92"></a><span id="L92" class="LineNr"> 92 </span>          --Top_of_screen<span class="Delimiter">;</span>
+<a name="L93"></a><span id="L93" class="LineNr"> 93 </span>      <span class="Delimiter">}</span>
+<a name="L94"></a><span id="L94" class="LineNr"> 94 </span>      <span class="Normal">if</span> <span class="Delimiter">(</span>Top_of_screen &gt;= <span class="Constant">0</span><span class="Delimiter">)</span>
+<a name="L95"></a><span id="L95" class="LineNr"> 95 </span>        refresh_screen_rows<span class="Delimiter">();</span>
+<a name="L96"></a><span id="L96" class="LineNr"> 96 </span>    <span class="Delimiter">}</span>
+<a name="L97"></a><span id="L97" class="LineNr"> 97 </span>    <span class="Normal">if</span> <span class="Delimiter">(</span>key == <span class="Constant">'G'</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
+<a name="L98"></a><span id="L98" class="LineNr"> 98 </span>      <span class="Comment">// go to bottom of screen; largely like page-up, interestingly</span>
+<a name="L99"></a><span id="L99" class="LineNr"> 99 </span>      Top_of_screen = SIZE<span class="Delimiter">(</span>Trace_stream<span class="Delimiter">-&gt;</span>past_lines<span class="Delimiter">)</span>-<span class="Constant">1</span><span class="Delimiter">;</span>
+<a name="L100"></a><span id="L100" class="LineNr">100 </span>      <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> screen_row = tb_height<span class="Delimiter">();</span> screen_row &gt; <span class="Constant">0</span> &amp;&amp; Top_of_screen &gt; <span class="Constant">0</span><span class="Delimiter">;</span> --screen_row<span class="Delimiter">)</span> <span class="Delimiter">{</span>
+<a name="L101"></a><span id="L101" class="LineNr">101 </span>        --Top_of_screen<span class="Delimiter">;</span>
+<a name="L102"></a><span id="L102" class="LineNr">102 </span>        <span class="Normal">if</span> <span class="Delimiter">(</span>Top_of_screen &lt;= <span class="Constant">0</span><span class="Delimiter">)</span> <span class="Identifier">break</span><span class="Delimiter">;</span>
+<a name="L103"></a><span id="L103" class="LineNr">103 </span>        <span class="Normal">while</span> <span class="Delimiter">(</span>Top_of_screen &gt; <span class="Constant">0</span> &amp;&amp; !contains_key<span class="Delimiter">(</span>Visible<span class="Delimiter">,</span> Top_of_screen<span class="Delimiter">))</span>
+<a name="L104"></a><span id="L104" class="LineNr">104 </span>          --Top_of_screen<span class="Delimiter">;</span>
+<a name="L105"></a><span id="L105" class="LineNr">105 </span>      <span class="Delimiter">}</span>
+<a name="L106"></a><span id="L106" class="LineNr">106 </span>      refresh_screen_rows<span class="Delimiter">();</span>
+<a name="L107"></a><span id="L107" class="LineNr">107 </span>      <span class="Comment">// move cursor to bottom</span>
+<a name="L108"></a><span id="L108" class="LineNr">108 </span>      Display_row = Last_printed_row<span class="Delimiter">;</span>
+<a name="L109"></a><span id="L109" class="LineNr">109 </span>      refresh_screen_rows<span class="Delimiter">();</span>
+<a name="L110"></a><span id="L110" class="LineNr">110 </span>    <span class="Delimiter">}</span>
+<a name="L111"></a><span id="L111" class="LineNr">111 </span>    <span class="Normal">if</span> <span class="Delimiter">(</span>key == TB_KEY_CARRIAGE_RETURN<span class="Delimiter">)</span> <span class="Delimiter">{</span>
+<a name="L112"></a><span id="L112" class="LineNr">112 </span>      <span class="Comment">// expand lines under current by one level</span>
+<a name="L113"></a><span id="L113" class="LineNr">113 </span>      assert<span class="Delimiter">(</span>contains_key<span class="Delimiter">(</span>Trace_index<span class="Delimiter">,</span> Display_row<span class="Delimiter">));</span>
+<a name="L114"></a><span id="L114" class="LineNr">114 </span>      <span class="Normal">int</span> start_index = get<span class="Delimiter">(</span>Trace_index<span class="Delimiter">,</span> Display_row<span class="Delimiter">);</span>
+<a name="L115"></a><span id="L115" class="LineNr">115 </span>      <span class="Normal">int</span> index = <span class="Constant">0</span><span class="Delimiter">;</span>
+<a name="L116"></a><span id="L116" class="LineNr">116 </span>      <span class="Comment">// simultaneously compute end_index and min_depth</span>
+<a name="L117"></a><span id="L117" class="LineNr">117 </span>      <span class="Normal">int</span> min_depth = <span class="Constant">9999</span><span class="Delimiter">;</span>
+<a name="L118"></a><span id="L118" class="LineNr">118 </span>      <span class="Normal">for</span> <span class="Delimiter">(</span>index = start_index+<span class="Constant">1</span><span class="Delimiter">;</span> index &lt; SIZE<span class="Delimiter">(</span>Trace_stream<span class="Delimiter">-&gt;</span>past_lines<span class="Delimiter">);</span> ++index<span class="Delimiter">)</span> <span class="Delimiter">{</span>
+<a name="L119"></a><span id="L119" class="LineNr">119 </span>        <span class="Normal">if</span> <span class="Delimiter">(</span>contains_key<span class="Delimiter">(</span>Visible<span class="Delimiter">,</span> index<span class="Delimiter">))</span> <span class="Identifier">break</span><span class="Delimiter">;</span>
+<a name="L120"></a><span id="L120" class="LineNr">120 </span>        trace_line&amp; curr_line = Trace_stream<span class="Delimiter">-&gt;</span>past_lines<span class="Delimiter">.</span>at<span class="Delimiter">(</span>index<span class="Delimiter">);</span>
+<a name="L121"></a><span id="L121" class="LineNr">121 </span>        assert<span class="Delimiter">(</span>curr_line<span class="Delimiter">.</span>depth &gt; Trace_stream<span class="Delimiter">-&gt;</span>past_lines<span class="Delimiter">.</span>at<span class="Delimiter">(</span>start_index<span class="Delimiter">).</span>depth<span class="Delimiter">);</span>
+<a name="L122"></a><span id="L122" class="LineNr">122 </span>        <span class="Normal">if</span> <span class="Delimiter">(</span>curr_line<span class="Delimiter">.</span>depth &lt; min_depth<span class="Delimiter">)</span> min_depth = curr_line<span class="Delimiter">.</span>depth<span class="Delimiter">;</span>
+<a name="L123"></a><span id="L123" class="LineNr">123 </span>      <span class="Delimiter">}</span>
+<a name="L124"></a><span id="L124" class="LineNr">124 </span>      <span class="Normal">int</span> end_index = index<span class="Delimiter">;</span>
+<a name="L125"></a><span id="L125" class="LineNr">125 </span>      <span class="Comment">// mark as visible all intervening indices at min_depth</span>
+<a name="L126"></a><span id="L126" class="LineNr">126 </span>      <span class="Normal">for</span> <span class="Delimiter">(</span>index = start_index<span class="Delimiter">;</span> index &lt; end_index<span class="Delimiter">;</span> ++index<span class="Delimiter">)</span> <span class="Delimiter">{</span>
+<a name="L127"></a><span id="L127" class="LineNr">127 </span>        trace_line&amp; curr_line = Trace_stream<span class="Delimiter">-&gt;</span>past_lines<span class="Delimiter">.</span>at<span class="Delimiter">(</span>index<span class="Delimiter">);</span>
+<a name="L128"></a><span id="L128" class="LineNr">128 </span>        <span class="Normal">if</span> <span class="Delimiter">(</span>curr_line<span class="Delimiter">.</span>depth == min_depth<span class="Delimiter">)</span> <span class="Delimiter">{</span>
+<a name="L129"></a><span id="L129" class="LineNr">129 </span>          Visible<span class="Delimiter">.</span>insert<span class="Delimiter">(</span>index<span class="Delimiter">);</span>
+<a name="L130"></a><span id="L130" class="LineNr">130 </span>        <span class="Delimiter">}</span>
+<a name="L131"></a><span id="L131" class="LineNr">131 </span>      <span class="Delimiter">}</span>
+<a name="L132"></a><span id="L132" class="LineNr">132 </span>      refresh_screen_rows<span class="Delimiter">();</span>
+<a name="L133"></a><span id="L133" class="LineNr">133 </span>    <span class="Delimiter">}</span>
+<a name="L134"></a><span id="L134" class="LineNr">134 </span>    <span class="Normal">if</span> <span class="Delimiter">(</span>key == TB_KEY_BACKSPACE || key == TB_KEY_BACKSPACE2<span class="Delimiter">)</span> <span class="Delimiter">{</span>
+<a name="L135"></a><span id="L135" class="LineNr">135 </span>      <span class="Comment">// collapse all lines under current</span>
+<a name="L136"></a><span id="L136" class="LineNr">136 </span>      assert<span class="Delimiter">(</span>contains_key<span class="Delimiter">(</span>Trace_index<span class="Delimiter">,</span> Display_row<span class="Delimiter">));</span>
+<a name="L137"></a><span id="L137" class="LineNr">137 </span>      <span class="Normal">int</span> start_index = get<span class="Delimiter">(</span>Trace_index<span class="Delimiter">,</span> Display_row<span class="Delimiter">);</span>
+<a name="L138"></a><span id="L138" class="LineNr">138 </span>      <span class="Normal">int</span> index = <span class="Constant">0</span><span class="Delimiter">;</span>
+<a name="L139"></a><span id="L139" class="LineNr">139 </span>      <span class="Comment">// end_index is the next line at a depth same as or lower than start_index</span>
+<a name="L140"></a><span id="L140" class="LineNr">140 </span>      <span class="Normal">int</span> initial_depth = Trace_stream<span class="Delimiter">-&gt;</span>past_lines<span class="Delimiter">.</span>at<span class="Delimiter">(</span>start_index<span class="Delimiter">).</span>depth<span class="Delimiter">;</span>
+<a name="L141"></a><span id="L141" class="LineNr">141 </span>      <span class="Normal">for</span> <span class="Delimiter">(</span>index = start_index+<span class="Constant">1</span><span class="Delimiter">;</span> index &lt; SIZE<span class="Delimiter">(</span>Trace_stream<span class="Delimiter">-&gt;</span>past_lines<span class="Delimiter">);</span> ++index<span class="Delimiter">)</span> <span class="Delimiter">{</span>
+<a name="L142"></a><span id="L142" class="LineNr">142 </span>        <span class="Normal">if</span> <span class="Delimiter">(</span>!contains_key<span class="Delimiter">(</span>Visible<span class="Delimiter">,</span> index<span class="Delimiter">))</span> <span class="Identifier">continue</span><span class="Delimiter">;</span>
+<a name="L143"></a><span id="L143" class="LineNr">143 </span>        trace_line&amp; curr_line = Trace_stream<span class="Delimiter">-&gt;</span>past_lines<span class="Delimiter">.</span>at<span class="Delimiter">(</span>index<span class="Delimiter">);</span>
+<a name="L144"></a><span id="L144" class="LineNr">144 </span>        <span class="Normal">if</span> <span class="Delimiter">(</span>curr_line<span class="Delimiter">.</span>depth &lt;= initial_depth<span class="Delimiter">)</span> <span class="Identifier">break</span><span class="Delimiter">;</span>
+<a name="L145"></a><span id="L145" class="LineNr">145 </span>      <span class="Delimiter">}</span>
+<a name="L146"></a><span id="L146" class="LineNr">146 </span>      <span class="Normal">int</span> end_index = index<span class="Delimiter">;</span>
+<a name="L147"></a><span id="L147" class="LineNr">147 </span>      <span class="Comment">// mark as visible all intervening indices at min_depth</span>
+<a name="L148"></a><span id="L148" class="LineNr">148 </span>      <span class="Normal">for</span> <span class="Delimiter">(</span>index = start_index+<span class="Constant">1</span><span class="Delimiter">;</span> index &lt; end_index<span class="Delimiter">;</span> ++index<span class="Delimiter">)</span> <span class="Delimiter">{</span>
+<a name="L149"></a><span id="L149" class="LineNr">149 </span>        Visible<span class="Delimiter">.</span>erase<span class="Delimiter">(</span>index<span class="Delimiter">);</span>
+<a name="L150"></a><span id="L150" class="LineNr">150 </span>      <span class="Delimiter">}</span>
+<a name="L151"></a><span id="L151" class="LineNr">151 </span>      refresh_screen_rows<span class="Delimiter">();</span>
+<a name="L152"></a><span id="L152" class="LineNr">152 </span>    <span class="Delimiter">}</span>
+<a name="L153"></a><span id="L153" class="LineNr">153 </span>  <span class="Delimiter">}</span>
+<a name="L154"></a><span id="L154" class="LineNr">154 </span>  tb_shutdown<span class="Delimiter">();</span>
+<a name="L155"></a><span id="L155" class="LineNr">155 </span><span class="Delimiter">}</span>
+<a name="L156"></a><span id="L156" class="LineNr">156 </span>
+<a name="L157"></a><span id="L157" class="LineNr">157 </span><span class="Comment">// update Trace_indices for each screen_row on the basis of Top_of_screen and Visible</span>
+<a name="L158"></a><span id="L158" class="LineNr">158 </span><span class="Normal">void</span> refresh_screen_rows<span class="Delimiter">()</span> <span class="Delimiter">{</span>
+<a name="L159"></a><span id="L159" class="LineNr">159 </span>  <span class="Normal">int</span> screen_row = <span class="Constant">0</span><span class="Delimiter">,</span> index = <span class="Constant">0</span><span class="Delimiter">;</span>
+<a name="L160"></a><span id="L160" class="LineNr">160 </span>  Trace_index<span class="Delimiter">.</span>clear<span class="Delimiter">();</span>
+<a name="L161"></a><span id="L161" class="LineNr">161 </span>  <span class="Normal">for</span> <span class="Delimiter">(</span>screen_row = <span class="Constant">0</span><span class="Delimiter">,</span> index = Top_of_screen<span class="Delimiter">;</span> screen_row &lt; tb_height<span class="Delimiter">()</span> &amp;&amp; index &lt; SIZE<span class="Delimiter">(</span>Trace_stream<span class="Delimiter">-&gt;</span>past_lines<span class="Delimiter">);</span> ++screen_row<span class="Delimiter">,</span> ++index<span class="Delimiter">)</span> <span class="Delimiter">{</span>
+<a name="L162"></a><span id="L162" class="LineNr">162 </span>    <span class="Comment">// skip lines without depth for now</span>
+<a name="L163"></a><span id="L163" class="LineNr">163 </span>    <span class="Normal">while</span> <span class="Delimiter">(</span>!contains_key<span class="Delimiter">(</span>Visible<span class="Delimiter">,</span> index<span class="Delimiter">))</span> <span class="Delimiter">{</span>
+<a name="L164"></a><span id="L164" class="LineNr">164 </span>      ++index<span class="Delimiter">;</span>
+<a name="L165"></a><span id="L165" class="LineNr">165 </span>      <span class="Normal">if</span> <span class="Delimiter">(</span>index &gt;= SIZE<span class="Delimiter">(</span>Trace_stream<span class="Delimiter">-&gt;</span>past_lines<span class="Delimiter">))</span> <span class="Identifier">goto</span> done<span class="Delimiter">;</span>
+<a name="L166"></a><span id="L166" class="LineNr">166 </span>    <span class="Delimiter">}</span>
+<a name="L167"></a><span id="L167" class="LineNr">167 </span>    assert<span class="Delimiter">(</span>index &lt; SIZE<span class="Delimiter">(</span>Trace_stream<span class="Delimiter">-&gt;</span>past_lines<span class="Delimiter">));</span>
+<a name="L168"></a><span id="L168" class="LineNr">168 </span>    put<span class="Delimiter">(</span>Trace_index<span class="Delimiter">,</span> screen_row<span class="Delimiter">,</span> index<span class="Delimiter">);</span>
+<a name="L169"></a><span id="L169" class="LineNr">169 </span>  <span class="Delimiter">}</span>
+<a name="L170"></a><span id="L170" class="LineNr">170 </span><span class="Normal">done</span>:<span class="Delimiter">;</span>
+<a name="L171"></a><span id="L171" class="LineNr">171 </span><span class="Delimiter">}</span>
+<a name="L172"></a><span id="L172" class="LineNr">172 </span>
+<a name="L173"></a><span id="L173" class="LineNr">173 </span><span class="Normal">void</span> render<span class="Delimiter">()</span> <span class="Delimiter">{</span>
+<a name="L174"></a><span id="L174" class="LineNr">174 </span>  <span class="Normal">int</span> screen_row = <span class="Constant">0</span><span class="Delimiter">;</span>
+<a name="L175"></a><span id="L175" class="LineNr">175 </span>  <span class="Normal">for</span> <span class="Delimiter">(</span>screen_row = <span class="Constant">0</span><span class="Delimiter">;</span> screen_row &lt; tb_height<span class="Delimiter">();</span> ++screen_row<span class="Delimiter">)</span> <span class="Delimiter">{</span>
+<a name="L176"></a><span id="L176" class="LineNr">176 </span>    <span class="Normal">if</span> <span class="Delimiter">(</span>!contains_key<span class="Delimiter">(</span>Trace_index<span class="Delimiter">,</span> screen_row<span class="Delimiter">))</span> <span class="Identifier">break</span><span class="Delimiter">;</span>
+<a name="L177"></a><span id="L177" class="LineNr">177 </span>    trace_line&amp; curr_line = Trace_stream<span class="Delimiter">-&gt;</span>past_lines<span class="Delimiter">.</span>at<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Trace_index<span class="Delimiter">,</span> screen_row<span class="Delimiter">));</span>
+<a name="L178"></a><span id="L178" class="LineNr">178 </span>    ostringstream out<span class="Delimiter">;</span>
+<a name="L179"></a><span id="L179" class="LineNr">179 </span>    out &lt;&lt; std::setw<span class="Delimiter">(</span><span class="Constant">4</span><span class="Delimiter">)</span> &lt;&lt; curr_line<span class="Delimiter">.</span>depth &lt;&lt; <span class="Constant">' '</span> &lt;&lt; curr_line<span class="Delimiter">.</span>label &lt;&lt; <span class="Constant">&quot;: &quot;</span> &lt;&lt; curr_line<span class="Delimiter">.</span>contents<span class="Delimiter">;</span>
+<a name="L180"></a><span id="L180" class="LineNr">180 </span>    <span class="Normal">if</span> <span class="Delimiter">(</span>screen_row &lt; tb_height<span class="Delimiter">()</span>-<span class="Constant">1</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
+<a name="L181"></a><span id="L181" class="LineNr">181 </span>      <span class="Normal">int</span> delta = lines_hidden<span class="Delimiter">(</span>screen_row<span class="Delimiter">);</span>
+<a name="L182"></a><span id="L182" class="LineNr">182 </span>      <span class="Comment">// home-brew escape sequence for red</span>
+<a name="L183"></a><span id="L183" class="LineNr">183 </span>      <span class="Normal">if</span> <span class="Delimiter">(</span>delta &gt; <span class="Constant">999</span><span class="Delimiter">)</span> out &lt;&lt; <span class="Normal">static_cast</span>&lt;<span class="Normal">char</span>&gt;<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">);</span>
+<a name="L184"></a><span id="L184" class="LineNr">184 </span>      out &lt;&lt; <span class="Constant">&quot; (&quot;</span> &lt;&lt; delta &lt;&lt; <span class="Constant">&quot;)&quot;</span><span class="Delimiter">;</span>
+<a name="L185"></a><span id="L185" class="LineNr">185 </span>      <span class="Normal">if</span> <span class="Delimiter">(</span>delta &gt; <span class="Constant">999</span><span class="Delimiter">)</span> out &lt;&lt; <span class="Normal">static_cast</span>&lt;<span class="Normal">char</span>&gt;<span class="Delimiter">(</span><span class="Constant">2</span><span class="Delimiter">);</span>
+<a name="L186"></a><span id="L186" class="LineNr">186 </span>    <span class="Delimiter">}</span>
+<a name="L187"></a><span id="L187" class="LineNr">187 </span>    render_line<span class="Delimiter">(</span>screen_row<span class="Delimiter">,</span> out<span class="Delimiter">.</span>str<span class="Delimiter">());</span>
+<a name="L188"></a><span id="L188" class="LineNr">188 </span>  <span class="Delimiter">}</span>
+<a name="L189"></a><span id="L189" class="LineNr">189 </span>  <span class="Comment">// clear rest of screen</span>
+<a name="L190"></a><span id="L190" class="LineNr">190 </span>  Last_printed_row = screen_row-<span class="Constant">1</span><span class="Delimiter">;</span>
+<a name="L191"></a><span id="L191" class="LineNr">191 </span>  <span class="Normal">for</span> <span class="Delimiter">(;</span> screen_row &lt; tb_height<span class="Delimiter">();</span> ++screen_row<span class="Delimiter">)</span> <span class="Delimiter">{</span>
+<a name="L192"></a><span id="L192" class="LineNr">192 </span>    render_line<span class="Delimiter">(</span>screen_row<span class="Delimiter">,</span> <span class="Constant">&quot;~&quot;</span><span class="Delimiter">);</span>
+<a name="L193"></a><span id="L193" class="LineNr">193 </span>  <span class="Delimiter">}</span>
+<a name="L194"></a><span id="L194" class="LineNr">194 </span>  <span class="Comment">// move cursor back to display row at the end</span>
+<a name="L195"></a><span id="L195" class="LineNr">195 </span>  tb_set_cursor<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">,</span> Display_row<span class="Delimiter">);</span>
+<a name="L196"></a><span id="L196" class="LineNr">196 </span>  tb_present<span class="Delimiter">();</span>
+<a name="L197"></a><span id="L197" class="LineNr">197 </span><span class="Delimiter">}</span>
+<a name="L198"></a><span id="L198" class="LineNr">198 </span>
+<a name="L199"></a><span id="L199" class="LineNr">199 </span><span class="Normal">int</span> lines_hidden<span class="Delimiter">(</span><span class="Normal">int</span> screen_row<span class="Delimiter">)</span> <span class="Delimiter">{</span>
+<a name="L200"></a><span id="L200" class="LineNr">200 </span>  assert<span class="Delimiter">(</span>contains_key<span class="Delimiter">(</span>Trace_index<span class="Delimiter">,</span> screen_row<span class="Delimiter">));</span>
+<a name="L201"></a><span id="L201" class="LineNr">201 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>!contains_key<span class="Delimiter">(</span>Trace_index<span class="Delimiter">,</span> screen_row+<span class="Constant">1</span><span class="Delimiter">))</span>
+<a name="L202"></a><span id="L202" class="LineNr">202 </span>    <span class="Identifier">return</span> SIZE<span class="Delimiter">(</span>Trace_stream<span class="Delimiter">-&gt;</span>past_lines<span class="Delimiter">)</span> - get<span class="Delimiter">(</span>Trace_index<span class="Delimiter">,</span> screen_row<span class="Delimiter">);</span>
+<a name="L203"></a><span id="L203" class="LineNr">203 </span>  <span class="Normal">else</span>
+<a name="L204"></a><span id="L204" class="LineNr">204 </span>    <span class="Identifier">return</span> get<span class="Delimiter">(</span>Trace_index<span class="Delimiter">,</span> screen_row+<span class="Constant">1</span><span class="Delimiter">)</span> - get<span class="Delimiter">(</span>Trace_index<span class="Delimiter">,</span> screen_row<span class="Delimiter">);</span>
+<a name="L205"></a><span id="L205" class="LineNr">205 </span><span class="Delimiter">}</span>
+<a name="L206"></a><span id="L206" class="LineNr">206 </span>
+<a name="L207"></a><span id="L207" class="LineNr">207 </span><span class="Normal">void</span> render_line<span class="Delimiter">(</span><span class="Normal">int</span> screen_row<span class="Delimiter">,</span> <span class="Normal">const</span> string&amp; s<span class="Delimiter">)</span> <span class="Delimiter">{</span>
+<a name="L208"></a><span id="L208" class="LineNr">208 </span>  <span class="Normal">int</span> col = <span class="Constant">0</span><span class="Delimiter">;</span>
+<a name="L209"></a><span id="L209" class="LineNr">209 </span>  <span class="Normal">int</span> color = TB_WHITE<span class="Delimiter">;</span>
+<a name="L210"></a><span id="L210" class="LineNr">210 </span>  <span class="Normal">for</span> <span class="Delimiter">(</span>col = <span class="Constant">0</span><span class="Delimiter">;</span> col &lt; tb_width<span class="Delimiter">()</span> &amp;&amp; col &lt; SIZE<span class="Delimiter">(</span>s<span class="Delimiter">);</span> ++col<span class="Delimiter">)</span> <span class="Delimiter">{</span>
+<a name="L211"></a><span id="L211" class="LineNr">211 </span>    <span class="Normal">char</span> c = s<span class="Delimiter">.</span>at<span class="Delimiter">(</span>col<span class="Delimiter">);</span>  <span class="Comment">// todo: unicode</span>
+<a name="L212"></a><span id="L212" class="LineNr">212 </span>    <span class="Normal">if</span> <span class="Delimiter">(</span>c == <span class="cSpecial">'\n'</span><span class="Delimiter">)</span> c = <span class="Constant">';'</span><span class="Delimiter">;</span>  <span class="Comment">// replace newlines with semi-colons</span>
+<a name="L213"></a><span id="L213" class="LineNr">213 </span>    <span class="Comment">// escapes. hack: can't start a line with them.</span>
+<a name="L214"></a><span id="L214" class="LineNr">214 </span>    <span class="Normal">if</span> <span class="Delimiter">(</span>c == <span class="cSpecial">'\1'</span><span class="Delimiter">)</span> <span class="Delimiter">{</span> color = <span class="Comment">/*</span><span class="Comment">red</span><span class="Comment">*/</span><span class="Constant">1</span><span class="Delimiter">;</span> c = <span class="Constant">' '</span><span class="Delimiter">;</span> <span class="Delimiter">}</span>
+<a name="L215"></a><span id="L215" class="LineNr">215 </span>    <span class="Normal">if</span> <span class="Delimiter">(</span>c == <span class="cSpecial">'\2'</span><span class="Delimiter">)</span> <span class="Delimiter">{</span> color = TB_WHITE<span class="Delimiter">;</span> c = <span class="Constant">' '</span><span class="Delimiter">;</span> <span class="Delimiter">}</span>
+<a name="L216"></a><span id="L216" class="LineNr">216 </span>    tb_change_cell<span class="Delimiter">(</span>col<span class="Delimiter">,</span> screen_row<span class="Delimiter">,</span> c<span class="Delimiter">,</span> color<span class="Delimiter">,</span> TB_BLACK<span class="Delimiter">);</span>
+<a name="L217"></a><span id="L217" class="LineNr">217 </span>  <span class="Delimiter">}</span>
+<a name="L218"></a><span id="L218" class="LineNr">218 </span>  <span class="Normal">for</span> <span class="Delimiter">(;</span> col &lt; tb_width<span class="Delimiter">();</span> ++col<span class="Delimiter">)</span> <span class="Delimiter">{</span>
+<a name="L219"></a><span id="L219" class="LineNr">219 </span>    tb_change_cell<span class="Delimiter">(</span>col<span class="Delimiter">,</span> screen_row<span class="Delimiter">,</span> <span class="Constant">' '</span><span class="Delimiter">,</span> TB_WHITE<span class="Delimiter">,</span> TB_BLACK<span class="Delimiter">);</span>
+<a name="L220"></a><span id="L220" class="LineNr">220 </span>  <span class="Delimiter">}</span>
+<a name="L221"></a><span id="L221" class="LineNr">221 </span><span class="Delimiter">}</span>
+<a name="L222"></a><span id="L222" class="LineNr">222 </span>
+<a name="L223"></a><span id="L223" class="LineNr">223 </span><span class="Normal">void</span> load_trace<span class="Delimiter">(</span><span class="Normal">const</span> <span class="Normal">char</span>* filename<span class="Delimiter">)</span> <span class="Delimiter">{</span>
+<a name="L224"></a><span id="L224" class="LineNr">224 </span>  ifstream tin<span class="Delimiter">(</span>filename<span class="Delimiter">);</span>
+<a name="L225"></a><span id="L225" class="LineNr">225 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>!tin<span class="Delimiter">)</span> <span class="Delimiter">{</span>
+<a name="L226"></a><span id="L226" class="LineNr">226 </span>    cerr &lt;&lt; <span class="Constant">&quot;no such file: &quot;</span> &lt;&lt; filename &lt;&lt; <span class="cSpecial">'\n'</span><span class="Delimiter">;</span>
+<a name="L227"></a><span id="L227" class="LineNr">227 </span>    exit<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">);</span>
+<a name="L228"></a><span id="L228" class="LineNr">228 </span>  <span class="Delimiter">}</span>
+<a name="L229"></a><span id="L229" class="LineNr">229 </span>  Trace_stream = <span class="Normal">new</span> trace_stream<span class="Delimiter">;</span>
+<a name="L230"></a><span id="L230" class="LineNr">230 </span>  <span class="Normal">while</span> <span class="Delimiter">(</span>has_data<span class="Delimiter">(</span>tin<span class="Delimiter">))</span> <span class="Delimiter">{</span>
+<a name="L231"></a><span id="L231" class="LineNr">231 </span>    tin &gt;&gt; std::noskipws<span class="Delimiter">;</span>
+<a name="L232"></a><span id="L232" class="LineNr">232 </span>      skip_whitespace_but_not_newline<span class="Delimiter">(</span>tin<span class="Delimiter">);</span>
+<a name="L233"></a><span id="L233" class="LineNr">233 </span>      <span class="Normal">if</span> <span class="Delimiter">(</span>!isdigit<span class="Delimiter">(</span>tin<span class="Delimiter">.</span>peek<span class="Delimiter">()))</span> <span class="Delimiter">{</span>
+<a name="L234"></a><span id="L234" class="LineNr">234 </span>        string dummy<span class="Delimiter">;</span>
+<a name="L235"></a><span id="L235" class="LineNr">235 </span>        getline<span class="Delimiter">(</span>tin<span class="Delimiter">,</span> dummy<span class="Delimiter">);</span>
+<a name="L236"></a><span id="L236" class="LineNr">236 </span>        <span class="Identifier">continue</span><span class="Delimiter">;</span>
+<a name="L237"></a><span id="L237" class="LineNr">237 </span>      <span class="Delimiter">}</span>
+<a name="L238"></a><span id="L238" class="LineNr">238 </span>    tin &gt;&gt; std::skipws<span class="Delimiter">;</span>
+<a name="L239"></a><span id="L239" class="LineNr">239 </span>    <span class="Normal">int</span> depth<span class="Delimiter">;</span>
+<a name="L240"></a><span id="L240" class="LineNr">240 </span>    tin &gt;&gt; depth<span class="Delimiter">;</span>
+<a name="L241"></a><span id="L241" class="LineNr">241 </span>    string label<span class="Delimiter">;</span>
+<a name="L242"></a><span id="L242" class="LineNr">242 </span>    tin &gt;&gt; label<span class="Delimiter">;</span>
+<a name="L243"></a><span id="L243" class="LineNr">243 </span>    <span class="Normal">if</span> <span class="Delimiter">(</span>*--label<span class="Delimiter">.</span>end<span class="Delimiter">()</span> == <span class="Constant">':'</span><span class="Delimiter">)</span> label<span class="Delimiter">.</span>erase<span class="Delimiter">(</span>--label<span class="Delimiter">.</span>end<span class="Delimiter">());</span>
+<a name="L244"></a><span id="L244" class="LineNr">244 </span>    string line<span class="Delimiter">;</span>
+<a name="L245"></a><span id="L245" class="LineNr">245 </span>    getline<span class="Delimiter">(</span>tin<span class="Delimiter">,</span> line<span class="Delimiter">);</span>
+<a name="L246"></a><span id="L246" class="LineNr">246 </span>    Trace_stream<span class="Delimiter">-&gt;</span>past_lines<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>trace_line<span class="Delimiter">(</span>depth<span class="Delimiter">,</span> label<span class="Delimiter">,</span> line<span class="Delimiter">));</span>
+<a name="L247"></a><span id="L247" class="LineNr">247 </span>  <span class="Delimiter">}</span>
+<a name="L248"></a><span id="L248" class="LineNr">248 </span>  cerr &lt;&lt; <span class="Constant">&quot;lines read: &quot;</span> &lt;&lt; Trace_stream<span class="Delimiter">-&gt;</span>past_lines<span class="Delimiter">.</span>size<span class="Delimiter">()</span> &lt;&lt; <span class="cSpecial">'\n'</span><span class="Delimiter">;</span>
+<a name="L249"></a><span id="L249" class="LineNr">249 </span><span class="Delimiter">}</span>
 </pre>
 </body>
 </html>