html/100trace_browser.cc.html


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<pre id='vimCodeElement'>
<span id="L1" class="LineNr">  1 </span><span class="Comment">//: A debugging helper that lets you zoom in/out on a trace.</span>
<span id="L2" class="LineNr">  2 </span><span class="Comment">//: Warning: this tool has zero automated tests.</span>
<span id="L3" class="LineNr">  3 </span><span class="Comment">//:</span>
<span id="L4" class="LineNr">  4 </span><span class="Comment">//: To try it out, first create an example trace:</span>
<span id="L5" class="LineNr">  5 </span><span class="Comment">//:   mu --trace nqueens.mu</span>
<span id="L6" class="LineNr">  6 </span><span class="Comment">//: Then to browse the trace, which was stored in a file called 'last_run':</span>
<span id="L7" class="LineNr">  7 </span><span class="Comment">//:   mu browse-trace last_run</span>
<span id="L8" class="LineNr">  8 </span><span class="Comment">//:</span>
<span id="L9" class="LineNr">  9 </span><span class="Comment">//: You should now find yourself in a UI showing a subsequence of lines from</span>
<span id="L10" class="LineNr"> 10 </span><span class="Comment">//: the trace, each line starting with a numeric depth, and ending with a</span>
<span id="L11" class="LineNr"> 11 </span><span class="Comment">//: parenthetical count of trace lines hidden after it with greater depths.</span>
<span id="L12" class="LineNr"> 12 </span><span class="Comment">//:</span>
<span id="L13" class="LineNr"> 13 </span><span class="Comment">//: For example, this line:</span>
<span id="L14" class="LineNr"> 14 </span><span class="Comment">//:   2 app: line1 (30)</span>
<span id="L15" class="LineNr"> 15 </span><span class="Comment">//: indicates that it was logged with depth 2, and that 30 following lines</span>
<span id="L16" class="LineNr"> 16 </span><span class="Comment">//: have been hidden at a depth greater than 2.</span>
<span id="L17" class="LineNr"> 17 </span><span class="Comment">//:</span>
<span id="L18" class="LineNr"> 18 </span><span class="Comment">//: As an experiment, hidden counts of 1000 or more are in red to highlight</span>
<span id="L19" class="LineNr"> 19 </span><span class="Comment">//: where you might be particularly interested in expanding.</span>
<span id="L20" class="LineNr"> 20 </span><span class="Comment">//:</span>
<span id="L21" class="LineNr"> 21 </span><span class="Comment">//: The UI provides the following hotkeys:</span>
<span id="L22" class="LineNr"> 22 </span><span class="Comment">//:</span>
<span id="L23" class="LineNr"> 23 </span><span class="Comment">//:   `q` or `ctrl-c`: Quit.</span>
<span id="L24" class="LineNr"> 24 </span><span class="Comment">//:</span>
<span id="L25" class="LineNr"> 25 </span><span class="Comment">//:   `Enter`: 'Zoom into' this line. Expand some or all of the hidden lines</span>
<span id="L26" class="LineNr"> 26 </span><span class="Comment">//:   at the next higher level, updating parenthetical counts of hidden lines.</span>
<span id="L27" class="LineNr"> 27 </span><span class="Comment">//:</span>
<span id="L28" class="LineNr"> 28 </span><span class="Comment">//:   `Backspace`: 'Zoom out' on a line after zooming in, collapsing expanded</span>
<span id="L29" class="LineNr"> 29 </span><span class="Comment">//:   lines below by some series of &lt;Enter&gt; commands.</span>
<span id="L30" class="LineNr"> 30 </span><span class="Comment">//:</span>
<span id="L31" class="LineNr"> 31 </span><span class="Comment">//:   `j` or `down-arrow`: Move/scroll cursor down one line.</span>
<span id="L32" class="LineNr"> 32 </span><span class="Comment">//:   `k` or `up-arrow`: Move/scroll cursor up one line.</span>
<span id="L33" class="LineNr"> 33 </span><span class="Comment">//:   `J` or `ctrl-f` or `page-down`: Scroll cursor down one page.</span>
<span id="L34" class="LineNr"> 34 </span><span class="Comment">//:   `K` or `ctrl-b` or `page-up`: Scroll cursor up one page.</span>
<span id="L35" class="LineNr"> 35 </span><span class="Comment">//:   `h` or `left-arrow`: Scroll cursor left one character.</span>
<span id="L36" class="LineNr"> 36 </span><span class="Comment">//:   `l` or `right-arrow`: Scroll cursor right one character.</span>
<span id="L37" class="LineNr"> 37 </span><span class="Comment">//:   `H`: Scroll cursor left one screen-width.</span>
<span id="L38" class="LineNr"> 38 </span><span class="Comment">//:   `L`: Scroll cursor right one screen-width.</span>
<span id="L39" class="LineNr"> 39 </span><span class="Comment">//:</span>
<span id="L40" class="LineNr"> 40 </span><span class="Comment">//:   `g` or `home`: Move cursor to start of trace.</span>
<span id="L41" class="LineNr"> 41 </span><span class="Comment">//:   `G` or `end`: Move cursor to end of trace.</span>
<span id="L42" class="LineNr"> 42 </span><span class="Comment">//:</span>
<span id="L43" class="LineNr"> 43 </span><span class="Comment">//:   `t`: Move cursor to top line on screen.</span>
<span id="L44" class="LineNr"> 44 </span><span class="Comment">//:   `c`: Move cursor to center line on screen.</span>
<span id="L45" class="LineNr"> 45 </span><span class="Comment">//:   `b`: Move cursor to bottom line on screen.</span>
<span id="L46" class="LineNr"> 46 </span><span class="Comment">//:   `T`: Scroll line at cursor to top of screen.</span>
<span id="L47" class="LineNr"> 47 </span><span class="Comment">//:</span>
<span id="L48" class="LineNr"> 48 </span><span class="Comment">//:   `/`: Search forward for a pattern.</span>
<span id="L49" class="LineNr"> 49 </span><span class="Comment">//:   '?': Search backward for a pattern.</span>
<span id="L50" class="LineNr"> 50 </span><span class="Comment">//:   `n`: Repeat the previous '/' or '?'.</span>
<span id="L51" class="LineNr"> 51 </span><span class="Comment">//:   `N`: Repeat the previous '/' or '?' in the opposite direction.</span>
<span id="L52" class="LineNr"> 52 </span><span class="Comment">//:</span>
<span id="L53" class="LineNr"> 53 </span><span class="Comment">//:   After hitting `/`, a small editor on the bottom-most line supports the</span>
<span id="L54" class="LineNr"> 54 </span><span class="Comment">//:   following hotkeys:</span>
<span id="L55" class="LineNr"> 55 </span><span class="Comment">//:     ascii characters: add the key to the pattern.</span>
<span id="L56" class="LineNr"> 56 </span><span class="Comment">//:     `Enter`: search for the pattern.</span>
<span id="L57" class="LineNr"> 57 </span><span class="Comment">//:     `Esc` or `ctrl-c`: cancel the current search, setting the screen back</span>
<span id="L58" class="LineNr"> 58 </span><span class="Comment">//:       to its state before the search.</span>
<span id="L59" class="LineNr"> 59 </span><span class="Comment">//:     `left-arrow`: move cursor left.</span>
<span id="L60" class="LineNr"> 60 </span><span class="Comment">//:     `right-arrow`: move cursor right.</span>
<span id="L61" class="LineNr"> 61 </span><span class="Comment">//:     `ctrl-a` or `home`: move cursor to start of search pattern.</span>
<span id="L62" class="LineNr"> 62 </span><span class="Comment">//:     `ctrl-e` or `end`: move cursor to end of search pattern.</span>
<span id="L63" class="LineNr"> 63 </span><span class="Comment">//:     `ctrl-u`: clear search pattern before cursor</span>
<span id="L64" class="LineNr"> 64 </span><span class="Comment">//:     `ctrl-k`: clear search pattern at and after cursor</span>
<span id="L65" class="LineNr"> 65 </span>
<span id="L66" class="LineNr"> 66 </span><span class="Delimiter">:(before &quot;End Primitive Recipe Declarations&quot;)</span>
<span id="L67" class="LineNr"> 67 </span>_BROWSE_TRACE<span class="Delimiter">,</span>
<span id="L68" class="LineNr"> 68 </span><span class="Delimiter">:(before &quot;End Primitive Recipe Numbers&quot;)</span>
<span id="L69" class="LineNr"> 69 </span><a href='001help.cc.html#L221'>put</a><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 id="L70" class="LineNr"> 70 </span><span class="Delimiter">:(before &quot;End Primitive Recipe Checks&quot;)</span>
<span id="L71" class="LineNr"> 71 </span><span class="Normal">case</span> _BROWSE_TRACE: <span class="Delimiter">{</span>
<span id="L72" class="LineNr"> 72 </span>  <span class="Identifier">break</span><span class="Delimiter">;</span>
<span id="L73" class="LineNr"> 73 </span><span class="Delimiter">}</span>
<span id="L74" class="LineNr"> 74 </span><span class="Delimiter">:(before &quot;End Primitive Recipe Implementations&quot;)</span>
<span id="L75" class="LineNr"> 75 </span><span class="Normal">case</span> _BROWSE_TRACE: <span class="Delimiter">{</span>
<span id="L76" class="LineNr"> 76 </span>  <a href='100trace_browser.cc.html#L101'>start_trace_browser</a><span class="Delimiter">();</span>
<span id="L77" class="LineNr"> 77 </span>  <span class="Identifier">break</span><span class="Delimiter">;</span>
<span id="L78" class="LineNr"> 78 </span><span class="Delimiter">}</span>
<span id="L79" class="LineNr"> 79 </span>
<span id="L80" class="LineNr"> 80 </span><span class="Comment">//: browse a trace loaded from a file</span>
<span id="L81" class="LineNr"> 81 </span><span class="Delimiter">:(after &quot;Commandline Parsing&quot;)</span>
<span id="L82" class="LineNr"> 82 </span><span class="Normal">if</span> <span class="Delimiter">(</span>argc == <span class="Constant">3</span> &amp;&amp; <a href='001help.cc.html#L73'>is_equal</a><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>
<span id="L83" class="LineNr"> 83 </span>  <a href='100trace_browser.cc.html#L494'>load_trace</a><span class="Delimiter">(</span>argv[<span class="Constant">2</span>]<span class="Delimiter">);</span>
<span id="L84" class="LineNr"> 84 </span>  <a href='100trace_browser.cc.html#L101'>start_trace_browser</a><span class="Delimiter">();</span>
<span id="L85" class="LineNr"> 85 </span>  <span class="Identifier">return</span> <span class="Constant">0</span><span class="Delimiter">;</span>
<span id="L86" class="LineNr"> 86 </span><span class="Delimiter">}</span>
<span id="L87" class="LineNr"> 87 </span>
<span id="L88" class="LineNr"> 88 </span><span class="Delimiter">:(before &quot;End Globals&quot;)</span>
<span id="L89" class="LineNr"> 89 </span>set&lt;<span class="Normal">int</span>&gt; Visible<span class="Delimiter">;</span>
<span id="L90" class="LineNr"> 90 </span><span class="Normal">int</span> Top_of_screen = <span class="Constant">0</span><span class="Delimiter">;</span>
<span id="L91" class="LineNr"> 91 </span><span class="Normal">int</span> Left_of_screen = <span class="Constant">0</span><span class="Delimiter">;</span>
<span id="L92" class="LineNr"> 92 </span><span class="Normal">int</span> Last_printed_row = <span class="Constant">0</span><span class="Delimiter">;</span>
<span id="L93" class="LineNr"> 93 </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 id="L94" class="LineNr"> 94 </span>string Current_search_pattern = <span class="Constant">&quot;&quot;</span><span class="Delimiter">;</span>
<span id="L95" class="LineNr"> 95 </span><span class="Delimiter">:(before &quot;End Types&quot;)</span>
<span id="L96" class="LineNr"> 96 </span><span class="Normal">enum</span> <a href='100trace_browser.cc.html#L96'>search_direction</a> <span class="Delimiter">{</span> <a href='100trace_browser.cc.html#L96'>FORWARD</a><span class="Delimiter">,</span> <a href='100trace_browser.cc.html#L96'>BACKWARD</a> <span class="Delimiter">};</span>
<span id="L97" class="LineNr"> 97 </span><span class="Delimiter">:(before &quot;End Globals&quot;)</span>
<span id="L98" class="LineNr"> 98 </span><a href='100trace_browser.cc.html#L96'>search_direction</a> Current_search_direction = <a href='100trace_browser.cc.html#L96'>FORWARD</a><span class="Delimiter">;</span>
<span id="L99" class="LineNr"> 99 </span>
<span id="L100" class="LineNr">100 </span><span class="Delimiter">:(code)</span>
<span id="L101" class="LineNr">101 </span><span class="Normal">void</span> <a href='100trace_browser.cc.html#L101'>start_trace_browser</a><span class="Delimiter">()</span> <span class="Delimiter">{</span>
<span id="L102" class="LineNr">102 </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>
<span id="L103" class="LineNr">103 </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 id="L104" class="LineNr">104 </span>  <span class="Normal">int</span> min_depth = <span class="Constant">9999</span><span class="Delimiter">;</span>
<span id="L105" class="LineNr">105 </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; <a href='001help.cc.html#L141'>SIZE</a><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 id="L106" class="LineNr">106 </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 id="L107" class="LineNr">107 </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 id="L108" class="LineNr">108 </span>  <span class="Delimiter">}</span>
<span id="L109" class="LineNr">109 </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>
<span id="L110" class="LineNr">110 </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 id="L111" class="LineNr">111 </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; <a href='001help.cc.html#L141'>SIZE</a><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 id="L112" class="LineNr">112 </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>
<span id="L113" class="LineNr">113 </span>      Visible<span class="Delimiter">.</span>insert<span class="Delimiter">(</span>i<span class="Delimiter">);</span>
<span id="L114" class="LineNr">114 </span>  <span class="Delimiter">}</span>
<span id="L115" class="LineNr">115 </span>  tb_init<span class="Delimiter">();</span>
<span id="L116" class="LineNr">116 </span>  tb_clear<span class="Delimiter">();</span>
<span id="L117" class="LineNr">117 </span>  Display_row = Display_column = <span class="Constant">0</span><span class="Delimiter">;</span>
<span id="L118" class="LineNr">118 </span>  Top_of_screen = <span class="Constant">0</span><span class="Delimiter">;</span>
<span id="L119" class="LineNr">119 </span>  <a href='100trace_browser.cc.html#L402'>refresh_screen_rows</a><span class="Delimiter">();</span>
<span id="L120" class="LineNr">120 </span>  <span class="Normal">while</span> <span class="Delimiter">(</span><span class="Constant">true</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L121" class="LineNr">121 </span>    <a href='100trace_browser.cc.html#L417'>render</a><span class="Delimiter">();</span>
<span id="L122" class="LineNr">122 </span>    <span class="Normal">int</span> key = <a href='100trace_browser.cc.html#L522'>read_key</a><span class="Delimiter">();</span>
<span id="L123" class="LineNr">123 </span>    <span class="Normal">if</span> <span class="Delimiter">(</span>key == <span class="Constant">'q'</span> || key == <span class="Constant">'Q'</span> || key == TB_KEY_CTRL_C<span class="Delimiter">)</span> <span class="Identifier">break</span><span class="Delimiter">;</span>
<span id="L124" class="LineNr">124 </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 id="L125" class="LineNr">125 </span>      <span class="Comment">// move cursor one line down</span>
<span id="L126" class="LineNr">126 </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 id="L127" class="LineNr">127 </span>    <span class="Delimiter">}</span>
<span id="L128" class="LineNr">128 </span>    <span class="Normal">else</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 id="L129" class="LineNr">129 </span>      <span class="Comment">// move cursor one line up</span>
<span id="L130" class="LineNr">130 </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 id="L131" class="LineNr">131 </span>    <span class="Delimiter">}</span>
<span id="L132" class="LineNr">132 </span>    <span class="Normal">else</span> <span class="Normal">if</span> <span class="Delimiter">(</span>key == <span class="Constant">'t'</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L133" class="LineNr">133 </span>      <span class="Comment">// move cursor to top of screen</span>
<span id="L134" class="LineNr">134 </span>      Display_row = <span class="Constant">0</span><span class="Delimiter">;</span>
<span id="L135" class="LineNr">135 </span>    <span class="Delimiter">}</span>
<span id="L136" class="LineNr">136 </span>    <span class="Normal">else</span> <span class="Normal">if</span> <span class="Delimiter">(</span>key == <span class="Constant">'c'</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L137" class="LineNr">137 </span>      <span class="Comment">// move cursor to center of screen</span>
<span id="L138" class="LineNr">138 </span>      Display_row = tb_height<span class="Delimiter">()</span>/<span class="Constant">2</span><span class="Delimiter">;</span>
<span id="L139" class="LineNr">139 </span>      <span class="Normal">while</span> <span class="Delimiter">(</span>!contains_key<span class="Delimiter">(</span>Trace_index<span class="Delimiter">,</span> Display_row<span class="Delimiter">))</span>
<span id="L140" class="LineNr">140 </span>        --Display_row<span class="Delimiter">;</span>
<span id="L141" class="LineNr">141 </span>    <span class="Delimiter">}</span>
<span id="L142" class="LineNr">142 </span>    <span class="Normal">else</span> <span class="Normal">if</span> <span class="Delimiter">(</span>key == <span class="Constant">'b'</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L143" class="LineNr">143 </span>      <span class="Comment">// move cursor to bottom of screen</span>
<span id="L144" class="LineNr">144 </span>      Display_row = tb_height<span class="Delimiter">()</span>-<span class="Constant">1</span><span class="Delimiter">;</span>
<span id="L145" class="LineNr">145 </span>      <span class="Normal">while</span> <span class="Delimiter">(</span>!contains_key<span class="Delimiter">(</span>Trace_index<span class="Delimiter">,</span> Display_row<span class="Delimiter">))</span>
<span id="L146" class="LineNr">146 </span>        --Display_row<span class="Delimiter">;</span>
<span id="L147" class="LineNr">147 </span>    <span class="Delimiter">}</span>
<span id="L148" class="LineNr">148 </span>    <span class="Normal">else</span> <span class="Normal">if</span> <span class="Delimiter">(</span>key == <span class="Constant">'T'</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L149" class="LineNr">149 </span>      <span class="Comment">// scroll line at cursor to top of screen</span>
<span id="L150" class="LineNr">150 </span>      Top_of_screen = get<span class="Delimiter">(</span>Trace_index<span class="Delimiter">,</span> Display_row<span class="Delimiter">);</span>
<span id="L151" class="LineNr">151 </span>      Display_row = <span class="Constant">0</span><span class="Delimiter">;</span>
<span id="L152" class="LineNr">152 </span>      <a href='100trace_browser.cc.html#L402'>refresh_screen_rows</a><span class="Delimiter">();</span>
<span id="L153" class="LineNr">153 </span>    <span class="Delimiter">}</span>
<span id="L154" class="LineNr">154 </span>    <span class="Normal">else</span> <span class="Normal">if</span> <span class="Delimiter">(</span>key == <span class="Constant">'h'</span> || key == TB_KEY_ARROW_LEFT<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L155" class="LineNr">155 </span>      <span class="Comment">// pan screen one character left</span>
<span id="L156" class="LineNr">156 </span>      <span class="Normal">if</span> <span class="Delimiter">(</span>Left_of_screen &gt; <span class="Constant">0</span><span class="Delimiter">)</span> --Left_of_screen<span class="Delimiter">;</span>
<span id="L157" class="LineNr">157 </span>    <span class="Delimiter">}</span>
<span id="L158" class="LineNr">158 </span>    <span class="Normal">else</span> <span class="Normal">if</span> <span class="Delimiter">(</span>key == <span class="Constant">'l'</span> || key == TB_KEY_ARROW_RIGHT<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L159" class="LineNr">159 </span>      <span class="Comment">// pan screen one character right</span>
<span id="L160" class="LineNr">160 </span>      ++Left_of_screen<span class="Delimiter">;</span>
<span id="L161" class="LineNr">161 </span>    <span class="Delimiter">}</span>
<span id="L162" class="LineNr">162 </span>    <span class="Normal">else</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 id="L163" class="LineNr">163 </span>      <span class="Comment">// pan screen one screen-width left</span>
<span id="L164" class="LineNr">164 </span>      Left_of_screen -= <span class="Delimiter">(</span>tb_width<span class="Delimiter">()</span> - <span class="Constant">5</span><span class="Delimiter">);</span>
<span id="L165" class="LineNr">165 </span>      <span class="Normal">if</span> <span class="Delimiter">(</span>Left_of_screen &lt; <span class="Constant">0</span><span class="Delimiter">)</span> Left_of_screen = <span class="Constant">0</span><span class="Delimiter">;</span>
<span id="L166" class="LineNr">166 </span>    <span class="Delimiter">}</span>
<span id="L167" class="LineNr">167 </span>    <span class="Normal">else</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 id="L168" class="LineNr">168 </span>      <span class="Comment">// pan screen one screen-width right</span>
<span id="L169" class="LineNr">169 </span>      Left_of_screen += <span class="Delimiter">(</span>tb_width<span class="Delimiter">()</span> - <span class="Constant">5</span><span class="Delimiter">);</span>
<span id="L170" class="LineNr">170 </span>    <span class="Delimiter">}</span>
<span id="L171" class="LineNr">171 </span>    <span class="Normal">else</span> <span class="Normal">if</span> <span class="Delimiter">(</span>key == <span class="Constant">'J'</span> || key == TB_KEY_PGDN || key == TB_KEY_CTRL_F<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L172" class="LineNr">172 </span>      <span class="Comment">// page-down</span>
<span id="L173" class="LineNr">173 </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><a href='003trace.cc.html#L203'>end</a><span class="Delimiter">())</span> <span class="Delimiter">{</span>
<span id="L174" class="LineNr">174 </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>
<span id="L175" class="LineNr">175 </span>        <a href='100trace_browser.cc.html#L402'>refresh_screen_rows</a><span class="Delimiter">();</span>
<span id="L176" class="LineNr">176 </span>      <span class="Delimiter">}</span>
<span id="L177" class="LineNr">177 </span>    <span class="Delimiter">}</span>
<span id="L178" class="LineNr">178 </span>    <span class="Normal">else</span> <span class="Normal">if</span> <span class="Delimiter">(</span>key == <span class="Constant">'K'</span> || key == TB_KEY_PGUP || key == TB_KEY_CTRL_B<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L179" class="LineNr">179 </span>      <span class="Comment">// page-up is more convoluted</span>
<span id="L180" class="LineNr">180 </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>
<span id="L181" class="LineNr">181 </span>        --Top_of_screen<span class="Delimiter">;</span>
<span id="L182" class="LineNr">182 </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 id="L183" class="LineNr">183 </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>
<span id="L184" class="LineNr">184 </span>          --Top_of_screen<span class="Delimiter">;</span>
<span id="L185" class="LineNr">185 </span>      <span class="Delimiter">}</span>
<span id="L186" class="LineNr">186 </span>      <span class="Normal">if</span> <span class="Delimiter">(</span>Top_of_screen &gt;= <span class="Constant">0</span><span class="Delimiter">)</span>
<span id="L187" class="LineNr">187 </span>        <a href='100trace_browser.cc.html#L402'>refresh_screen_rows</a><span class="Delimiter">();</span>
<span id="L188" class="LineNr">188 </span>    <span class="Delimiter">}</span>
<span id="L189" class="LineNr">189 </span>    <span class="Normal">else</span> <span class="Normal">if</span> <span class="Delimiter">(</span>key == <span class="Constant">'g'</span> || key == TB_KEY_HOME<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L190" class="LineNr">190 </span>        Top_of_screen = <span class="Constant">0</span><span class="Delimiter">;</span>
<span id="L191" class="LineNr">191 </span>        Last_printed_row = <span class="Constant">0</span><span class="Delimiter">;</span>
<span id="L192" class="LineNr">192 </span>        Display_row = <span class="Constant">0</span><span class="Delimiter">;</span>
<span id="L193" class="LineNr">193 </span>        <a href='100trace_browser.cc.html#L402'>refresh_screen_rows</a><span class="Delimiter">();</span>
<span id="L194" class="LineNr">194 </span>    <span class="Delimiter">}</span>
<span id="L195" class="LineNr">195 </span>    <span class="Normal">else</span> <span class="Normal">if</span> <span class="Delimiter">(</span>key == <span class="Constant">'G'</span> || key == TB_KEY_END<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L196" class="LineNr">196 </span>      <span class="Comment">// go to bottom of screen; largely like page-up, interestingly</span>
<span id="L197" class="LineNr">197 </span>      Top_of_screen = <a href='001help.cc.html#L141'>SIZE</a><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 id="L198" class="LineNr">198 </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>
<span id="L199" class="LineNr">199 </span>        --Top_of_screen<span class="Delimiter">;</span>
<span id="L200" class="LineNr">200 </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 id="L201" class="LineNr">201 </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>
<span id="L202" class="LineNr">202 </span>          --Top_of_screen<span class="Delimiter">;</span>
<span id="L203" class="LineNr">203 </span>      <span class="Delimiter">}</span>
<span id="L204" class="LineNr">204 </span>      <a href='100trace_browser.cc.html#L402'>refresh_screen_rows</a><span class="Delimiter">();</span>
<span id="L205" class="LineNr">205 </span>      <span class="Comment">// move cursor to bottom</span>
<span id="L206" class="LineNr">206 </span>      Display_row = Last_printed_row<span class="Delimiter">;</span>
<span id="L207" class="LineNr">207 </span>      <a href='100trace_browser.cc.html#L402'>refresh_screen_rows</a><span class="Delimiter">();</span>
<span id="L208" class="LineNr">208 </span>    <span class="Delimiter">}</span>
<span id="L209" class="LineNr">209 </span>    <span class="Normal">else</span> <span class="Normal">if</span> <span class="Delimiter">(</span>key == TB_KEY_CARRIAGE_RETURN<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L210" class="LineNr">210 </span>      <span class="Comment">// expand lines under current by one level</span>
<span id="L211" class="LineNr">211 </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 id="L212" class="LineNr">212 </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 id="L213" class="LineNr">213 </span>      <span class="Normal">int</span> index = <span class="Constant">0</span><span class="Delimiter">;</span>
<span id="L214" class="LineNr">214 </span>      <span class="Comment">// simultaneously compute end_index and min_depth</span>
<span id="L215" class="LineNr">215 </span>      <span class="Normal">int</span> min_depth = <span class="Constant">9999</span><span class="Delimiter">;</span>
<span id="L216" class="LineNr">216 </span>      <span class="Normal">for</span> <span class="Delimiter">(</span>index = start_index+<span class="Constant">1</span><span class="Delimiter">;</span>  index &lt; <a href='001help.cc.html#L141'>SIZE</a><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 id="L217" class="LineNr">217 </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>
<span id="L218" class="LineNr">218 </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 id="L219" class="LineNr">219 </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 id="L220" class="LineNr">220 </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 id="L221" class="LineNr">221 </span>      <span class="Delimiter">}</span>
<span id="L222" class="LineNr">222 </span>      <span class="Normal">int</span> end_index = index<span class="Delimiter">;</span>
<span id="L223" class="LineNr">223 </span>      <span class="Comment">// mark as visible all intervening indices at min_depth</span>
<span id="L224" class="LineNr">224 </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>
<span id="L225" class="LineNr">225 </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 id="L226" class="LineNr">226 </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>
<span id="L227" class="LineNr">227 </span>          Visible<span class="Delimiter">.</span>insert<span class="Delimiter">(</span>index<span class="Delimiter">);</span>
<span id="L228" class="LineNr">228 </span>        <span class="Delimiter">}</span>
<span id="L229" class="LineNr">229 </span>      <span class="Delimiter">}</span>
<span id="L230" class="LineNr">230 </span>      <a href='100trace_browser.cc.html#L402'>refresh_screen_rows</a><span class="Delimiter">();</span>
<span id="L231" class="LineNr">231 </span>    <span class="Delimiter">}</span>
<span id="L232" class="LineNr">232 </span>    <span class="Normal">else</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 id="L233" class="LineNr">233 </span>      <span class="Comment">// collapse all lines under current</span>
<span id="L234" class="LineNr">234 </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 id="L235" class="LineNr">235 </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 id="L236" class="LineNr">236 </span>      <span class="Normal">int</span> index = <span class="Constant">0</span><span class="Delimiter">;</span>
<span id="L237" class="LineNr">237 </span>      <span class="Comment">// end_index is the next line at a depth same as or lower than start_index</span>
<span id="L238" class="LineNr">238 </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 id="L239" class="LineNr">239 </span>      <span class="Normal">for</span> <span class="Delimiter">(</span>index = start_index+<span class="Constant">1</span><span class="Delimiter">;</span>  index &lt; <a href='001help.cc.html#L141'>SIZE</a><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 id="L240" class="LineNr">240 </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>
<span id="L241" class="LineNr">241 </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 id="L242" class="LineNr">242 </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 id="L243" class="LineNr">243 </span>      <span class="Delimiter">}</span>
<span id="L244" class="LineNr">244 </span>      <span class="Normal">int</span> end_index = index<span class="Delimiter">;</span>
<span id="L245" class="LineNr">245 </span>      <span class="Comment">// mark as visible all intervening indices at min_depth</span>
<span id="L246" class="LineNr">246 </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>
<span id="L247" class="LineNr">247 </span>        Visible<span class="Delimiter">.</span>erase<span class="Delimiter">(</span>index<span class="Delimiter">);</span>
<span id="L248" class="LineNr">248 </span>      <span class="Delimiter">}</span>
<span id="L249" class="LineNr">249 </span>      <a href='100trace_browser.cc.html#L402'>refresh_screen_rows</a><span class="Delimiter">();</span>
<span id="L250" class="LineNr">250 </span>    <span class="Delimiter">}</span>
<span id="L251" class="LineNr">251 </span>    <span class="Normal">else</span> <span class="Normal">if</span> <span class="Delimiter">(</span>key == <span class="Constant">'/'</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L252" class="LineNr">252 </span>      <span class="Normal">if</span> <span class="Delimiter">(</span><a href='100trace_browser.cc.html#L271'>start_search_editor</a><span class="Delimiter">(</span><a href='100trace_browser.cc.html#L96'>FORWARD</a><span class="Delimiter">))</span>
<span id="L253" class="LineNr">253 </span>        <a href='100trace_browser.cc.html#L360'>search</a><span class="Delimiter">(</span>Current_search_pattern<span class="Delimiter">,</span> Current_search_direction<span class="Delimiter">);</span>
<span id="L254" class="LineNr">254 </span>    <span class="Delimiter">}</span>
<span id="L255" class="LineNr">255 </span>    <span class="Normal">else</span> <span class="Normal">if</span> <span class="Delimiter">(</span>key == <span class="Constant">'?'</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L256" class="LineNr">256 </span>      <span class="Normal">if</span> <span class="Delimiter">(</span><a href='100trace_browser.cc.html#L271'>start_search_editor</a><span class="Delimiter">(</span><a href='100trace_browser.cc.html#L96'>BACKWARD</a><span class="Delimiter">))</span>
<span id="L257" class="LineNr">257 </span>        <a href='100trace_browser.cc.html#L360'>search</a><span class="Delimiter">(</span>Current_search_pattern<span class="Delimiter">,</span> Current_search_direction<span class="Delimiter">);</span>
<span id="L258" class="LineNr">258 </span>    <span class="Delimiter">}</span>
<span id="L259" class="LineNr">259 </span>    <span class="Normal">else</span> <span class="Normal">if</span> <span class="Delimiter">(</span>key == <span class="Constant">'n'</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L260" class="LineNr">260 </span>      <span class="Normal">if</span> <span class="Delimiter">(</span>!Current_search_pattern<span class="Delimiter">.</span>empty<span class="Delimiter">())</span>
<span id="L261" class="LineNr">261 </span>        <a href='100trace_browser.cc.html#L360'>search</a><span class="Delimiter">(</span>Current_search_pattern<span class="Delimiter">,</span> Current_search_direction<span class="Delimiter">);</span>
<span id="L262" class="LineNr">262 </span>    <span class="Delimiter">}</span>
<span id="L263" class="LineNr">263 </span>    <span class="Normal">else</span> <span class="Normal">if</span> <span class="Delimiter">(</span>key == <span class="Constant">'N'</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L264" class="LineNr">264 </span>      <span class="Normal">if</span> <span class="Delimiter">(</span>!Current_search_pattern<span class="Delimiter">.</span>empty<span class="Delimiter">())</span>
<span id="L265" class="LineNr">265 </span>        <a href='100trace_browser.cc.html#L360'>search</a><span class="Delimiter">(</span>Current_search_pattern<span class="Delimiter">,</span> <a href='100trace_browser.cc.html#L365'>opposite</a><span class="Delimiter">(</span>Current_search_direction<span class="Delimiter">));</span>
<span id="L266" class="LineNr">266 </span>    <span class="Delimiter">}</span>
<span id="L267" class="LineNr">267 </span>  <span class="Delimiter">}</span>
<span id="L268" class="LineNr">268 </span>  tb_shutdown<span class="Delimiter">();</span>
<span id="L269" class="LineNr">269 </span><span class="Delimiter">}</span>
<span id="L270" class="LineNr">270 </span>
<span id="L271" class="LineNr">271 </span><span class="Normal">bool</span> <a href='100trace_browser.cc.html#L271'>start_search_editor</a><span class="Delimiter">(</span><a href='100trace_browser.cc.html#L96'>search_direction</a> dir<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L272" class="LineNr">272 </span>  <span class="Normal">const</span> <span class="Normal">int</span> bottom_screen_line = tb_height<span class="Delimiter">()</span>-<span class="Constant">1</span><span class="Delimiter">;</span>
<span id="L273" class="LineNr">273 </span>  <span class="Comment">// run a little editor just in the last line of the screen</span>
<span id="L274" class="LineNr">274 </span>  <a href='100trace_browser.cc.html#L394'>clear_line</a><span class="Delimiter">(</span>bottom_screen_line<span class="Delimiter">);</span>
<span id="L275" class="LineNr">275 </span>  <span class="Normal">int</span> col = <span class="Constant">0</span><span class="Delimiter">;</span>  <span class="Comment">// screen column of cursor on bottom line. also used to update pattern.</span>
<span id="L276" class="LineNr">276 </span>  tb_set_cursor<span class="Delimiter">(</span>col<span class="Delimiter">,</span> bottom_screen_line<span class="Delimiter">);</span>
<span id="L277" class="LineNr">277 </span>  tb_print<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 id="L278" class="LineNr">278 </span>  ++col<span class="Delimiter">;</span>
<span id="L279" class="LineNr">279 </span>  string pattern<span class="Delimiter">;</span>
<span id="L280" class="LineNr">280 </span>  <span class="Normal">while</span> <span class="Delimiter">(</span><span class="Constant">true</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L281" class="LineNr">281 </span>    <span class="Normal">int</span> key = <a href='100trace_browser.cc.html#L522'>read_key</a><span class="Delimiter">();</span>
<span id="L282" class="LineNr">282 </span>    <span class="Normal">if</span> <span class="Delimiter">(</span>key == TB_KEY_ENTER<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L283" class="LineNr">283 </span>      <span class="Normal">if</span> <span class="Delimiter">(</span>!pattern<span class="Delimiter">.</span>empty<span class="Delimiter">())</span> <span class="Delimiter">{</span>
<span id="L284" class="LineNr">284 </span>        Current_search_pattern = pattern<span class="Delimiter">;</span>
<span id="L285" class="LineNr">285 </span>        Current_search_direction = dir<span class="Delimiter">;</span>
<span id="L286" class="LineNr">286 </span>      <span class="Delimiter">}</span>
<span id="L287" class="LineNr">287 </span>      <span class="Identifier">return</span> <span class="Constant">true</span><span class="Delimiter">;</span>
<span id="L288" class="LineNr">288 </span>    <span class="Delimiter">}</span>
<span id="L289" class="LineNr">289 </span>    <span class="Normal">else</span> <span class="Normal">if</span> <span class="Delimiter">(</span>key == TB_KEY_ESC || key == TB_KEY_CTRL_C<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L290" class="LineNr">290 </span>      <span class="Identifier">return</span> <span class="Constant">false</span><span class="Delimiter">;</span>
<span id="L291" class="LineNr">291 </span>    <span class="Delimiter">}</span>
<span id="L292" class="LineNr">292 </span>    <span class="Normal">else</span> <span class="Normal">if</span> <span class="Delimiter">(</span>key == TB_KEY_ARROW_LEFT<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L293" class="LineNr">293 </span>      <span class="Normal">if</span> <span class="Delimiter">(</span>col &gt; <span class="Comment">/*</span><span class="Comment">slash</span><span class="Comment">*/</span><span class="Constant">1</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L294" class="LineNr">294 </span>        --col<span class="Delimiter">;</span>
<span id="L295" class="LineNr">295 </span>        tb_set_cursor<span class="Delimiter">(</span>col<span class="Delimiter">,</span> bottom_screen_line<span class="Delimiter">);</span>
<span id="L296" class="LineNr">296 </span>      <span class="Delimiter">}</span>
<span id="L297" class="LineNr">297 </span>    <span class="Delimiter">}</span>
<span id="L298" class="LineNr">298 </span>    <span class="Normal">else</span> <span class="Normal">if</span> <span class="Delimiter">(</span>key == TB_KEY_ARROW_RIGHT<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L299" class="LineNr">299 </span>      <span class="Normal">if</span> <span class="Delimiter">(</span>col-<span class="Comment">/*</span><span class="Comment">slash</span><span class="Comment">*/</span><span class="Constant">1</span> &lt; <a href='001help.cc.html#L141'>SIZE</a><span class="Delimiter">(</span>pattern<span class="Delimiter">))</span> <span class="Delimiter">{</span>
<span id="L300" class="LineNr">300 </span>        ++col<span class="Delimiter">;</span>
<span id="L301" class="LineNr">301 </span>        tb_set_cursor<span class="Delimiter">(</span>col<span class="Delimiter">,</span> bottom_screen_line<span class="Delimiter">);</span>
<span id="L302" class="LineNr">302 </span>      <span class="Delimiter">}</span>
<span id="L303" class="LineNr">303 </span>    <span class="Delimiter">}</span>
<span id="L304" class="LineNr">304 </span>    <span class="Normal">else</span> <span class="Normal">if</span> <span class="Delimiter">(</span>key == TB_KEY_HOME || key == TB_KEY_CTRL_A<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L305" class="LineNr">305 </span>      col = <span class="Comment">/*</span><span class="Comment">skip slash</span><span class="Comment">*/</span><span class="Constant">1</span><span class="Delimiter">;</span>
<span id="L306" class="LineNr">306 </span>      tb_set_cursor<span class="Delimiter">(</span>col<span class="Delimiter">,</span> bottom_screen_line<span class="Delimiter">);</span>
<span id="L307" class="LineNr">307 </span>    <span class="Delimiter">}</span>
<span id="L308" class="LineNr">308 </span>    <span class="Normal">else</span> <span class="Normal">if</span> <span class="Delimiter">(</span>key == TB_KEY_END || key == TB_KEY_CTRL_E<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L309" class="LineNr">309 </span>      col = <a href='001help.cc.html#L141'>SIZE</a><span class="Delimiter">(</span>pattern<span class="Delimiter">)</span>+<span class="Comment">/*</span><span class="Comment">skip slash</span><span class="Comment">*/</span><span class="Constant">1</span><span class="Delimiter">;</span>
<span id="L310" class="LineNr">310 </span>      tb_set_cursor<span class="Delimiter">(</span>col<span class="Delimiter">,</span> bottom_screen_line<span class="Delimiter">);</span>
<span id="L311" class="LineNr">311 </span>    <span class="Delimiter">}</span>
<span id="L312" class="LineNr">312 </span>    <span class="Normal">else</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 id="L313" class="LineNr">313 </span>      <span class="Normal">if</span> <span class="Delimiter">(</span>col &gt; <span class="Comment">/*</span><span class="Comment">slash</span><span class="Comment">*/</span><span class="Constant">1</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L314" class="LineNr">314 </span>        assert<span class="Delimiter">(</span>col &lt;= <a href='001help.cc.html#L141'>SIZE</a><span class="Delimiter">(</span>pattern<span class="Delimiter">)</span>+<span class="Constant">1</span><span class="Delimiter">);</span>
<span id="L315" class="LineNr">315 </span>        --col<span class="Delimiter">;</span>
<span id="L316" class="LineNr">316 </span>        <span class="Comment">// update pattern</span>
<span id="L317" class="LineNr">317 </span>        pattern<span class="Delimiter">.</span>erase<span class="Delimiter">(</span>col-<span class="Comment">/*</span><span class="Comment">slash</span><span class="Comment">*/</span><span class="Constant">1</span><span class="Delimiter">,</span> <span class="Comment">/*</span><span class="Comment">len</span><span class="Comment">*/</span><span class="Constant">1</span><span class="Delimiter">);</span>
<span id="L318" class="LineNr">318 </span>        <span class="Comment">// update screen</span>
<span id="L319" class="LineNr">319 </span>        tb_set_cursor<span class="Delimiter">(</span>col<span class="Delimiter">,</span> bottom_screen_line<span class="Delimiter">);</span>
<span id="L320" class="LineNr">320 </span>        <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> x = col<span class="Delimiter">;</span>  x &lt; <a href='001help.cc.html#L141'>SIZE</a><span class="Delimiter">(</span>pattern<span class="Delimiter">)</span>+<span class="Comment">/*</span><span class="Comment">skip slash</span><span class="Comment">*/</span><span class="Constant">1</span><span class="Delimiter">;</span>  ++x<span class="Delimiter">)</span>
<span id="L321" class="LineNr">321 </span>          tb_print<span class="Delimiter">(</span>pattern<span class="Delimiter">.</span>at<span class="Delimiter">(</span>x-<span class="Comment">/*</span><span class="Comment">slash</span><span class="Comment">*/</span><span class="Constant">1</span><span class="Delimiter">),</span> TB_WHITE<span class="Delimiter">,</span> TB_BLACK<span class="Delimiter">);</span>
<span id="L322" class="LineNr">322 </span>        tb_print<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 id="L323" class="LineNr">323 </span>        tb_set_cursor<span class="Delimiter">(</span>col<span class="Delimiter">,</span> bottom_screen_line<span class="Delimiter">);</span>
<span id="L324" class="LineNr">324 </span>      <span class="Delimiter">}</span>
<span id="L325" class="LineNr">325 </span>    <span class="Delimiter">}</span>
<span id="L326" class="LineNr">326 </span>    <span class="Normal">else</span> <span class="Normal">if</span> <span class="Delimiter">(</span>key == TB_KEY_CTRL_K<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L327" class="LineNr">327 </span>      <span class="Normal">int</span> old_pattern_size = <a href='001help.cc.html#L141'>SIZE</a><span class="Delimiter">(</span>pattern<span class="Delimiter">);</span>
<span id="L328" class="LineNr">328 </span>      pattern<span class="Delimiter">.</span>erase<span class="Delimiter">(</span>col-<span class="Comment">/*</span><span class="Comment">slash</span><span class="Comment">*/</span><span class="Constant">1</span><span class="Delimiter">,</span> <a href='001help.cc.html#L141'>SIZE</a><span class="Delimiter">(</span>pattern<span class="Delimiter">)</span> - <span class="Delimiter">(</span>col-<span class="Comment">/*</span><span class="Comment">slash</span><span class="Comment">*/</span><span class="Constant">1</span><span class="Delimiter">));</span>
<span id="L329" class="LineNr">329 </span>      tb_set_cursor<span class="Delimiter">(</span>col<span class="Delimiter">,</span> bottom_screen_line<span class="Delimiter">);</span>
<span id="L330" class="LineNr">330 </span>      <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> x = col<span class="Delimiter">;</span>  x &lt; old_pattern_size+<span class="Comment">/*</span><span class="Comment">slash</span><span class="Comment">*/</span><span class="Constant">1</span><span class="Delimiter">;</span>  ++x<span class="Delimiter">)</span>
<span id="L331" class="LineNr">331 </span>        tb_print<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 id="L332" class="LineNr">332 </span>      tb_set_cursor<span class="Delimiter">(</span>col<span class="Delimiter">,</span> bottom_screen_line<span class="Delimiter">);</span>
<span id="L333" class="LineNr">333 </span>    <span class="Delimiter">}</span>
<span id="L334" class="LineNr">334 </span>    <span class="Normal">else</span> <span class="Normal">if</span> <span class="Delimiter">(</span>key == TB_KEY_CTRL_U<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L335" class="LineNr">335 </span>      <span class="Normal">int</span> old_pattern_size = <a href='001help.cc.html#L141'>SIZE</a><span class="Delimiter">(</span>pattern<span class="Delimiter">);</span>
<span id="L336" class="LineNr">336 </span>      pattern<span class="Delimiter">.</span>erase<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">,</span> col-<span class="Comment">/*</span><span class="Comment">slash</span><span class="Comment">*/</span><span class="Constant">1</span><span class="Delimiter">);</span>
<span id="L337" class="LineNr">337 </span>      col = <span class="Comment">/*</span><span class="Comment">skip slash</span><span class="Comment">*/</span><span class="Constant">1</span><span class="Delimiter">;</span>
<span id="L338" class="LineNr">338 </span>      tb_set_cursor<span class="Delimiter">(</span>col<span class="Delimiter">,</span> bottom_screen_line<span class="Delimiter">);</span>
<span id="L339" class="LineNr">339 </span>      <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> x = <span class="Comment">/*</span><span class="Comment">slash</span><span class="Comment">*/</span><span class="Constant">1</span><span class="Delimiter">;</span>  x &lt; <a href='001help.cc.html#L141'>SIZE</a><span class="Delimiter">(</span>pattern<span class="Delimiter">)</span>+<span class="Comment">/*</span><span class="Comment">skip slash</span><span class="Comment">*/</span><span class="Constant">1</span><span class="Delimiter">;</span>  ++x<span class="Delimiter">)</span>
<span id="L340" class="LineNr">340 </span>        tb_print<span class="Delimiter">(</span>pattern<span class="Delimiter">.</span>at<span class="Delimiter">(</span>x-<span class="Comment">/*</span><span class="Comment">slash</span><span class="Comment">*/</span><span class="Constant">1</span><span class="Delimiter">),</span> TB_WHITE<span class="Delimiter">,</span> TB_BLACK<span class="Delimiter">);</span>
<span id="L341" class="LineNr">341 </span>      <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> x = <a href='001help.cc.html#L141'>SIZE</a><span class="Delimiter">(</span>pattern<span class="Delimiter">)</span>+<span class="Comment">/*</span><span class="Comment">slash</span><span class="Comment">*/</span><span class="Constant">1</span><span class="Delimiter">;</span>  x &lt; old_pattern_size+<span class="Comment">/*</span><span class="Comment">skip slash</span><span class="Comment">*/</span><span class="Constant">1</span><span class="Delimiter">;</span>  ++x<span class="Delimiter">)</span>
<span id="L342" class="LineNr">342 </span>        tb_print<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 id="L343" class="LineNr">343 </span>      tb_set_cursor<span class="Delimiter">(</span>col<span class="Delimiter">,</span> bottom_screen_line<span class="Delimiter">);</span>
<span id="L344" class="LineNr">344 </span>    <span class="Delimiter">}</span>
<span id="L345" class="LineNr">345 </span>    <span class="Normal">else</span> <span class="Normal">if</span> <span class="Delimiter">(</span>key &lt; <span class="Constant">128</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>  <span class="Comment">// ascii only</span>
<span id="L346" class="LineNr">346 </span>      <span class="Comment">// update pattern</span>
<span id="L347" class="LineNr">347 </span>      <span class="Normal">char</span> c = <span class="Normal">static_cast</span>&lt;<span class="Normal">char</span>&gt;<span class="Delimiter">(</span>key<span class="Delimiter">);</span>
<span id="L348" class="LineNr">348 </span>      assert<span class="Delimiter">(</span>col-<span class="Constant">1</span> &gt;= <span class="Constant">0</span><span class="Delimiter">);</span>
<span id="L349" class="LineNr">349 </span>      assert<span class="Delimiter">(</span>col-<span class="Constant">1</span> &lt;= <a href='001help.cc.html#L141'>SIZE</a><span class="Delimiter">(</span>pattern<span class="Delimiter">));</span>
<span id="L350" class="LineNr">350 </span>      pattern<span class="Delimiter">.</span>insert<span class="Delimiter">(</span>col-<span class="Comment">/*</span><span class="Comment">slash</span><span class="Comment">*/</span><span class="Constant">1</span><span class="Delimiter">,</span> <span class="Comment">/*</span><span class="Comment">num</span><span class="Comment">*/</span><span class="Constant">1</span><span class="Delimiter">,</span> c<span class="Delimiter">);</span>
<span id="L351" class="LineNr">351 </span>      <span class="Comment">// update screen</span>
<span id="L352" class="LineNr">352 </span>      <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> x = col<span class="Delimiter">;</span>  x &lt; <a href='001help.cc.html#L141'>SIZE</a><span class="Delimiter">(</span>pattern<span class="Delimiter">)</span>+<span class="Comment">/*</span><span class="Comment">skip slash</span><span class="Comment">*/</span><span class="Constant">1</span><span class="Delimiter">;</span>  ++x<span class="Delimiter">)</span>
<span id="L353" class="LineNr">353 </span>        tb_print<span class="Delimiter">(</span>pattern<span class="Delimiter">.</span>at<span class="Delimiter">(</span>x-<span class="Comment">/*</span><span class="Comment">slash</span><span class="Comment">*/</span><span class="Constant">1</span><span class="Delimiter">),</span> TB_WHITE<span class="Delimiter">,</span> TB_BLACK<span class="Delimiter">);</span>
<span id="L354" class="LineNr">354 </span>      ++col<span class="Delimiter">;</span>
<span id="L355" class="LineNr">355 </span>      tb_set_cursor<span class="Delimiter">(</span>col<span class="Delimiter">,</span> bottom_screen_line<span class="Delimiter">);</span>
<span id="L356" class="LineNr">356 </span>    <span class="Delimiter">}</span>
<span id="L357" class="LineNr">357 </span>  <span class="Delimiter">}</span>
<span id="L358" class="LineNr">358 </span><span class="Delimiter">}</span>
<span id="L359" class="LineNr">359 </span>
<span id="L360" class="LineNr">360 </span><span class="Normal">void</span> <a href='100trace_browser.cc.html#L360'>search</a><span class="Delimiter">(</span><span class="Normal">const</span> string&amp; pat<span class="Delimiter">,</span> <a href='100trace_browser.cc.html#L96'>search_direction</a> dir<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L361" class="LineNr">361 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>dir == <a href='100trace_browser.cc.html#L96'>FORWARD</a><span class="Delimiter">)</span> <a href='100trace_browser.cc.html#L370'>search_next</a><span class="Delimiter">(</span>pat<span class="Delimiter">);</span>
<span id="L362" class="LineNr">362 </span>  <span class="Normal">else</span> <a href='100trace_browser.cc.html#L382'>search_previous</a><span class="Delimiter">(</span>pat<span class="Delimiter">);</span>
<span id="L363" class="LineNr">363 </span><span class="Delimiter">}</span>
<span id="L364" class="LineNr">364 </span>
<span id="L365" class="LineNr">365 </span><a href='100trace_browser.cc.html#L96'>search_direction</a> <a href='100trace_browser.cc.html#L365'>opposite</a><span class="Delimiter">(</span><a href='100trace_browser.cc.html#L96'>search_direction</a> dir<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L366" class="LineNr">366 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>dir == <a href='100trace_browser.cc.html#L96'>FORWARD</a><span class="Delimiter">)</span> <span class="Identifier">return</span> <a href='100trace_browser.cc.html#L96'>BACKWARD</a><span class="Delimiter">;</span>
<span id="L367" class="LineNr">367 </span>  <span class="Normal">else</span> <span class="Identifier">return</span> <a href='100trace_browser.cc.html#L96'>FORWARD</a><span class="Delimiter">;</span>
<span id="L368" class="LineNr">368 </span><span class="Delimiter">}</span>
<span id="L369" class="LineNr">369 </span>
<span id="L370" class="LineNr">370 </span><span class="Normal">void</span> <a href='100trace_browser.cc.html#L370'>search_next</a><span class="Delimiter">(</span><span class="Normal">const</span> string&amp; pat<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L371" class="LineNr">371 </span>  <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> trace_index = get<span class="Delimiter">(</span>Trace_index<span class="Delimiter">,</span> Display_row<span class="Delimiter">)</span>+<span class="Constant">1</span><span class="Delimiter">;</span>  trace_index &lt; <a href='001help.cc.html#L141'>SIZE</a><span class="Delimiter">(</span>Trace_stream<span class="Delimiter">-&gt;</span>past_lines<span class="Delimiter">);</span>  ++trace_index<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L372" class="LineNr">372 </span>    <span class="Normal">if</span> <span class="Delimiter">(</span>!contains_key<span class="Delimiter">(</span>Visible<span class="Delimiter">,</span> trace_index<span class="Delimiter">))</span> <span class="Identifier">continue</span><span class="Delimiter">;</span>
<span id="L373" class="LineNr">373 </span>    <span class="Normal">const</span> trace_line&amp; line = Trace_stream<span class="Delimiter">-&gt;</span>past_lines<span class="Delimiter">.</span>at<span class="Delimiter">(</span>trace_index<span class="Delimiter">);</span>
<span id="L374" class="LineNr">374 </span>    <span class="Normal">if</span> <span class="Delimiter">(</span>line<span class="Delimiter">.</span>label<span class="Delimiter">.</span>find<span class="Delimiter">(</span>pat<span class="Delimiter">)</span> == string::npos &amp;&amp; line<span class="Delimiter">.</span>contents<span class="Delimiter">.</span>find<span class="Delimiter">(</span>pat<span class="Delimiter">)</span> == string::npos<span class="Delimiter">)</span> <span class="Identifier">continue</span><span class="Delimiter">;</span>
<span id="L375" class="LineNr">375 </span>    Top_of_screen = trace_index<span class="Delimiter">;</span>
<span id="L376" class="LineNr">376 </span>    Display_row = <span class="Constant">0</span><span class="Delimiter">;</span>
<span id="L377" class="LineNr">377 </span>    <a href='100trace_browser.cc.html#L402'>refresh_screen_rows</a><span class="Delimiter">();</span>
<span id="L378" class="LineNr">378 </span>    <span class="Identifier">return</span><span class="Delimiter">;</span>
<span id="L379" class="LineNr">379 </span>  <span class="Delimiter">}</span>
<span id="L380" class="LineNr">380 </span><span class="Delimiter">}</span>
<span id="L381" class="LineNr">381 </span>
<span id="L382" class="LineNr">382 </span><span class="Normal">void</span> <a href='100trace_browser.cc.html#L382'>search_previous</a><span class="Delimiter">(</span><span class="Normal">const</span> string&amp; pat<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L383" class="LineNr">383 </span>  <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> trace_index = get<span class="Delimiter">(</span>Trace_index<span class="Delimiter">,</span> Display_row<span class="Delimiter">)</span>-<span class="Constant">1</span><span class="Delimiter">;</span>  trace_index &gt;= <span class="Constant">0</span><span class="Delimiter">;</span>  --trace_index<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L384" class="LineNr">384 </span>    <span class="Normal">if</span> <span class="Delimiter">(</span>!contains_key<span class="Delimiter">(</span>Visible<span class="Delimiter">,</span> trace_index<span class="Delimiter">))</span> <span class="Identifier">continue</span><span class="Delimiter">;</span>
<span id="L385" class="LineNr">385 </span>    <span class="Normal">const</span> trace_line&amp; line = Trace_stream<span class="Delimiter">-&gt;</span>past_lines<span class="Delimiter">.</span>at<span class="Delimiter">(</span>trace_index<span class="Delimiter">);</span>
<span id="L386" class="LineNr">386 </span>    <span class="Normal">if</span> <span class="Delimiter">(</span>line<span class="Delimiter">.</span>label<span class="Delimiter">.</span>find<span class="Delimiter">(</span>pat<span class="Delimiter">)</span> == string::npos &amp;&amp; line<span class="Delimiter">.</span>contents<span class="Delimiter">.</span>find<span class="Delimiter">(</span>pat<span class="Delimiter">)</span> == string::npos<span class="Delimiter">)</span> <span class="Identifier">continue</span><span class="Delimiter">;</span>
<span id="L387" class="LineNr">387 </span>    Top_of_screen = trace_index<span class="Delimiter">;</span>
<span id="L388" class="LineNr">388 </span>    Display_row = <span class="Constant">0</span><span class="Delimiter">;</span>
<span id="L389" class="LineNr">389 </span>    <a href='100trace_browser.cc.html#L402'>refresh_screen_rows</a><span class="Delimiter">();</span>
<span id="L390" class="LineNr">390 </span>    <span class="Identifier">return</span><span class="Delimiter">;</span>
<span id="L391" class="LineNr">391 </span>  <span class="Delimiter">}</span>
<span id="L392" class="LineNr">392 </span><span class="Delimiter">}</span>
<span id="L393" class="LineNr">393 </span>
<span id="L394" class="LineNr">394 </span><span class="Normal">void</span> <a href='100trace_browser.cc.html#L394'>clear_line</a><span class="Delimiter">(</span><span class="Normal">int</span> screen_row<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L395" class="LineNr">395 </span>  tb_set_cursor<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">,</span> screen_row<span class="Delimiter">);</span>
<span id="L396" class="LineNr">396 </span>  <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> col = <span class="Constant">0</span><span class="Delimiter">;</span>  col &lt; tb_width<span class="Delimiter">();</span>  ++col<span class="Delimiter">)</span>
<span id="L397" class="LineNr">397 </span>    tb_print<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 id="L398" class="LineNr">398 </span>  tb_set_cursor<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">,</span> screen_row<span class="Delimiter">);</span>
<span id="L399" class="LineNr">399 </span><span class="Delimiter">}</span>
<span id="L400" class="LineNr">400 </span>
<span id="L401" class="LineNr">401 </span><span class="Comment">// update Trace_indices for each screen_row on the basis of Top_of_screen and Visible</span>
<span id="L402" class="LineNr">402 </span><span class="Normal">void</span> <a href='100trace_browser.cc.html#L402'>refresh_screen_rows</a><span class="Delimiter">()</span> <span class="Delimiter">{</span>
<span id="L403" class="LineNr">403 </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>
<span id="L404" class="LineNr">404 </span>  Trace_index<span class="Delimiter">.</span><a href='050scenario.cc.html#L60'>clear</a><span class="Delimiter">();</span>
<span id="L405" class="LineNr">405 </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; <a href='001help.cc.html#L141'>SIZE</a><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 id="L406" class="LineNr">406 </span>    <span class="Comment">// skip lines without depth for now</span>
<span id="L407" class="LineNr">407 </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>
<span id="L408" class="LineNr">408 </span>      ++index<span class="Delimiter">;</span>
<span id="L409" class="LineNr">409 </span>      <span class="Normal">if</span> <span class="Delimiter">(</span>index &gt;= <a href='001help.cc.html#L141'>SIZE</a><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 id="L410" class="LineNr">410 </span>    <span class="Delimiter">}</span>
<span id="L411" class="LineNr">411 </span>    assert<span class="Delimiter">(</span>index &lt; <a href='001help.cc.html#L141'>SIZE</a><span class="Delimiter">(</span>Trace_stream<span class="Delimiter">-&gt;</span>past_lines<span class="Delimiter">));</span>
<span id="L412" class="LineNr">412 </span>    <a href='001help.cc.html#L221'>put</a><span class="Delimiter">(</span>Trace_index<span class="Delimiter">,</span> screen_row<span class="Delimiter">,</span> index<span class="Delimiter">);</span>
<span id="L413" class="LineNr">413 </span>  <span class="Delimiter">}</span>
<span id="L414" class="LineNr">414 </span><span class="Normal">done</span>:<span class="Delimiter">;</span>
<span id="L415" class="LineNr">415 </span><span class="Delimiter">}</span>
<span id="L416" class="LineNr">416 </span>
<span id="L417" class="LineNr">417 </span><span class="Normal">void</span> <a href='100trace_browser.cc.html#L417'>render</a><span class="Delimiter">()</span> <span class="Delimiter">{</span>
<span id="L418" class="LineNr">418 </span>  <span class="Normal">int</span> screen_row = <span class="Constant">0</span><span class="Delimiter">;</span>
<span id="L419" class="LineNr">419 </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 id="L420" class="LineNr">420 </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>
<span id="L421" class="LineNr">421 </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>
<span id="L422" class="LineNr">422 </span>    ostringstream out<span class="Delimiter">;</span>
<span id="L423" class="LineNr">423 </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 id="L424" class="LineNr">424 </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 id="L425" class="LineNr">425 </span>      <span class="Normal">int</span> delta = <a href='100trace_browser.cc.html#L443'>lines_hidden</a><span class="Delimiter">(</span>screen_row<span class="Delimiter">);</span>
<span id="L426" class="LineNr">426 </span>      <span class="Comment">// home-brew escape sequence for red</span>
<span id="L427" class="LineNr">427 </span>      <span class="Normal">if</span> <span class="Delimiter">(</span>delta &gt; <span class="Constant">1</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L428" class="LineNr">428 </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>
<span id="L429" class="LineNr">429 </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 id="L430" class="LineNr">430 </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 id="L431" class="LineNr">431 </span>      <span class="Delimiter">}</span>
<span id="L432" class="LineNr">432 </span>    <span class="Delimiter">}</span>
<span id="L433" class="LineNr">433 </span>    <a href='100trace_browser.cc.html#L451'>render_line</a><span class="Delimiter">(</span>screen_row<span class="Delimiter">,</span> out<span class="Delimiter">.</span>str<span class="Delimiter">(),</span> screen_row == Display_row<span class="Delimiter">);</span>
<span id="L434" class="LineNr">434 </span>  <span class="Delimiter">}</span>
<span id="L435" class="LineNr">435 </span>  <span class="Comment">// clear rest of screen</span>
<span id="L436" class="LineNr">436 </span>  Last_printed_row = screen_row-<span class="Constant">1</span><span class="Delimiter">;</span>
<span id="L437" class="LineNr">437 </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 id="L438" class="LineNr">438 </span>    <a href='100trace_browser.cc.html#L451'>render_line</a><span class="Delimiter">(</span>screen_row<span class="Delimiter">,</span> <span class="Constant">&quot;~&quot;</span><span class="Delimiter">,</span> <span class="Comment">/*</span><span class="Comment">cursor_line?</span><span class="Comment">*/</span><span class="Constant">false</span><span class="Delimiter">);</span>
<span id="L439" class="LineNr">439 </span>  <span class="Comment">// move cursor back to display row at the end</span>
<span id="L440" class="LineNr">440 </span>  tb_set_cursor<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">,</span> Display_row<span class="Delimiter">);</span>
<span id="L441" class="LineNr">441 </span><span class="Delimiter">}</span>
<span id="L442" class="LineNr">442 </span>
<span id="L443" class="LineNr">443 </span><span class="Normal">int</span> <a href='100trace_browser.cc.html#L443'>lines_hidden</a><span class="Delimiter">(</span><span class="Normal">int</span> screen_row<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L444" class="LineNr">444 </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 id="L445" class="LineNr">445 </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 id="L446" class="LineNr">446 </span>    <span class="Identifier">return</span> <a href='001help.cc.html#L141'>SIZE</a><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 id="L447" class="LineNr">447 </span>  <span class="Normal">else</span>
<span id="L448" class="LineNr">448 </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 id="L449" class="LineNr">449 </span><span class="Delimiter">}</span>
<span id="L450" class="LineNr">450 </span>
<span id="L451" class="LineNr">451 </span><span class="Normal">void</span> <a href='100trace_browser.cc.html#L451'>render_line</a><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="Normal">bool</span> cursor_line<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L452" class="LineNr">452 </span>  <span class="Normal">int</span> col = <span class="Constant">0</span><span class="Delimiter">;</span>
<span id="L453" class="LineNr">453 </span>  <span class="Normal">int</span> color = TB_WHITE<span class="Delimiter">;</span>
<span id="L454" class="LineNr">454 </span>  <span class="Normal">int</span> background_color = cursor_line ? <span class="Comment">/*</span><span class="Comment">subtle grey</span><span class="Comment">*/</span><span class="Constant">240</span> : TB_BLACK<span class="Delimiter">;</span>
<span id="L455" class="LineNr">455 </span>  vector&lt;pair&lt;<span class="Normal">size_t</span><span class="Delimiter">,</span> <span class="Normal">size_t</span>&gt; &gt; highlight_ranges = <a href='100trace_browser.cc.html#L472'>find_all_occurrences</a><span class="Delimiter">(</span>s<span class="Delimiter">,</span> Current_search_pattern<span class="Delimiter">);</span>
<span id="L456" class="LineNr">456 </span>  tb_set_cursor<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">,</span> screen_row<span class="Delimiter">);</span>
<span id="L457" class="LineNr">457 </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+Left_of_screen &lt; <a href='001help.cc.html#L141'>SIZE</a><span class="Delimiter">(</span>s<span class="Delimiter">);</span>  ++col<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L458" class="LineNr">458 </span>    <span class="Normal">char</span> c = s<span class="Delimiter">.</span>at<span class="Delimiter">(</span>col+Left_of_screen<span class="Delimiter">);</span>  <span class="Comment">// todo: unicode</span>
<span id="L459" class="LineNr">459 </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 id="L460" class="LineNr">460 </span>    <span class="Comment">// escapes. hack: can't start a line with them.</span>
<span id="L461" class="LineNr">461 </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 id="L462" class="LineNr">462 </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>
<span id="L463" class="LineNr">463 </span>    <span class="Normal">if</span> <span class="Delimiter">(</span><a href='100trace_browser.cc.html#L485'>in_range</a><span class="Delimiter">(</span>highlight_ranges<span class="Delimiter">,</span> col+Left_of_screen<span class="Delimiter">))</span>
<span id="L464" class="LineNr">464 </span>      tb_print<span class="Delimiter">(</span>c<span class="Delimiter">,</span> TB_BLACK<span class="Delimiter">,</span> <span class="Comment">/*</span><span class="Comment">yellow</span><span class="Comment">*/</span><span class="Constant">11</span><span class="Delimiter">);</span>
<span id="L465" class="LineNr">465 </span>    <span class="Normal">else</span>
<span id="L466" class="LineNr">466 </span>      tb_print<span class="Delimiter">(</span>c<span class="Delimiter">,</span> color<span class="Delimiter">,</span> background_color<span class="Delimiter">);</span>
<span id="L467" class="LineNr">467 </span>  <span class="Delimiter">}</span>
<span id="L468" class="LineNr">468 </span>  <span class="Normal">for</span> <span class="Delimiter">(;</span>  col &lt; tb_width<span class="Delimiter">();</span>  ++col<span class="Delimiter">)</span>
<span id="L469" class="LineNr">469 </span>    tb_print<span class="Delimiter">(</span><span class="Constant">' '</span><span class="Delimiter">,</span> TB_WHITE<span class="Delimiter">,</span> background_color<span class="Delimiter">);</span>
<span id="L470" class="LineNr">470 </span><span class="Delimiter">}</span>
<span id="L471" class="LineNr">471 </span>
<span id="L472" class="LineNr">472 </span>vector&lt;pair&lt;<span class="Normal">size_t</span><span class="Delimiter">,</span> <span class="Normal">size_t</span>&gt; &gt; <a href='100trace_browser.cc.html#L472'>find_all_occurrences</a><span class="Delimiter">(</span><span class="Normal">const</span> string&amp; s<span class="Delimiter">,</span> <span class="Normal">const</span> string&amp; pat<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L473" class="LineNr">473 </span>  vector&lt;pair&lt;<span class="Normal">size_t</span><span class="Delimiter">,</span> <span class="Normal">size_t</span>&gt; &gt; result<span class="Delimiter">;</span>
<span id="L474" class="LineNr">474 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>pat<span class="Delimiter">.</span>empty<span class="Delimiter">())</span> <span class="Identifier">return</span> result<span class="Delimiter">;</span>
<span id="L475" class="LineNr">475 </span>  <span class="Normal">size_t</span> idx = <span class="Constant">0</span><span class="Delimiter">;</span>
<span id="L476" class="LineNr">476 </span>  <span class="Normal">while</span> <span class="Delimiter">(</span><span class="Constant">true</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L477" class="LineNr">477 </span>    <span class="Normal">size_t</span> next_idx = s<span class="Delimiter">.</span>find<span class="Delimiter">(</span>pat<span class="Delimiter">,</span> idx<span class="Delimiter">);</span>
<span id="L478" class="LineNr">478 </span>    <span class="Normal">if</span> <span class="Delimiter">(</span>next_idx == string::npos<span class="Delimiter">)</span> <span class="Identifier">break</span><span class="Delimiter">;</span>
<span id="L479" class="LineNr">479 </span>    result<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>pair&lt;<span class="Normal">size_t</span><span class="Delimiter">,</span> <span class="Normal">size_t</span>&gt;<span class="Delimiter">(</span>next_idx<span class="Delimiter">,</span> next_idx+SIZE<span class="Delimiter">(</span>pat<span class="Delimiter">)));</span>
<span id="L480" class="LineNr">480 </span>    idx = next_idx+SIZE<span class="Delimiter">(</span>pat<span class="Delimiter">);</span>
<span id="L481" class="LineNr">481 </span>  <span class="Delimiter">}</span>
<span id="L482" class="LineNr">482 </span>  <span class="Identifier">return</span> result<span class="Delimiter">;</span>
<span id="L483" class="LineNr">483 </span><span class="Delimiter">}</span>
<span id="L484" class="LineNr">484 </span>
<span id="L485" class="LineNr">485 </span><span class="Normal">bool</span> <a href='100trace_browser.cc.html#L485'>in_range</a><span class="Delimiter">(</span><span class="Normal">const</span> vector&lt;pair&lt;<span class="Normal">size_t</span><span class="Delimiter">,</span> <span class="Normal">size_t</span>&gt; &gt;&amp; highlight_ranges<span class="Delimiter">,</span> <span class="Normal">size_t</span> idx<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L486" class="LineNr">486 </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; <a href='001help.cc.html#L141'>SIZE</a><span class="Delimiter">(</span>highlight_ranges<span class="Delimiter">);</span>  ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L487" class="LineNr">487 </span>    <span class="Normal">if</span> <span class="Delimiter">(</span>idx &gt;= highlight_ranges<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>first &amp;&amp; idx &lt; highlight_ranges<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>second<span class="Delimiter">)</span>
<span id="L488" class="LineNr">488 </span>      <span class="Identifier">return</span> <span class="Constant">true</span><span class="Delimiter">;</span>
<span id="L489" class="LineNr">489 </span>    <span class="Normal">if</span> <span class="Delimiter">(</span>idx &lt; highlight_ranges<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>second<span class="Delimiter">)</span> <span class="Identifier">break</span><span class="Delimiter">;</span>
<span id="L490" class="LineNr">490 </span>  <span class="Delimiter">}</span>
<span id="L491" class="LineNr">491 </span>  <span class="Identifier">return</span> <span class="Constant">false</span><span class="Delimiter">;</span>
<span id="L492" class="LineNr">492 </span><span class="Delimiter">}</span>
<span id="L493" class="LineNr">493 </span>
<span id="L494" class="LineNr">494 </span><span class="Normal">void</span> <a href='100trace_browser.cc.html#L494'>load_trace</a><span class="Delimiter">(</span><span class="Normal">const</span> <span class="Normal">char</span>* filename<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L495" class="LineNr">495 </span>  ifstream tin<span class="Delimiter">(</span>filename<span class="Delimiter">);</span>
<span id="L496" class="LineNr">496 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>!tin<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L497" class="LineNr">497 </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>
<span id="L498" class="LineNr">498 </span>    exit<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">);</span>
<span id="L499" class="LineNr">499 </span>  <span class="Delimiter">}</span>
<span id="L500" class="LineNr">500 </span>  Trace_stream = <span class="Normal">new</span> trace_stream<span class="Delimiter">;</span>
<span id="L501" class="LineNr">501 </span>  <span class="Normal">while</span> <span class="Delimiter">(</span><a href='001help.cc.html#L239'>has_data</a><span class="Delimiter">(</span>tin<span class="Delimiter">))</span> <span class="Delimiter">{</span>
<span id="L502" class="LineNr">502 </span>    tin &gt;&gt; std::noskipws<span class="Delimiter">;</span>
<span id="L503" class="LineNr">503 </span>      skip_whitespace_but_not_newline<span class="Delimiter">(</span>tin<span class="Delimiter">);</span>
<span id="L504" class="LineNr">504 </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>
<span id="L505" class="LineNr">505 </span>        string dummy<span class="Delimiter">;</span>
<span id="L506" class="LineNr">506 </span>        getline<span class="Delimiter">(</span>tin<span class="Delimiter">,</span> dummy<span class="Delimiter">);</span>
<span id="L507" class="LineNr">507 </span>        <span class="Identifier">continue</span><span class="Delimiter">;</span>
<span id="L508" class="LineNr">508 </span>      <span class="Delimiter">}</span>
<span id="L509" class="LineNr">509 </span>    tin &gt;&gt; std::skipws<span class="Delimiter">;</span>
<span id="L510" class="LineNr">510 </span>    <span class="Normal">int</span> depth<span class="Delimiter">;</span>
<span id="L511" class="LineNr">511 </span>    tin &gt;&gt; depth<span class="Delimiter">;</span>
<span id="L512" class="LineNr">512 </span>    string label<span class="Delimiter">;</span>
<span id="L513" class="LineNr">513 </span>    tin &gt;&gt; label<span class="Delimiter">;</span>
<span id="L514" class="LineNr">514 </span>    <span class="Normal">if</span> <span class="Delimiter">(</span>*--label<span class="Delimiter">.</span><a href='003trace.cc.html#L203'>end</a><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><a href='003trace.cc.html#L203'>end</a><span class="Delimiter">());</span>
<span id="L515" class="LineNr">515 </span>    string line<span class="Delimiter">;</span>
<span id="L516" class="LineNr">516 </span>    getline<span class="Delimiter">(</span>tin<span class="Delimiter">,</span> line<span class="Delimiter">);</span>
<span id="L517" class="LineNr">517 </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 id="L518" class="LineNr">518 </span>  <span class="Delimiter">}</span>
<span id="L519" class="LineNr">519 </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 id="L520" class="LineNr">520 </span><span class="Delimiter">}</span>
<span id="L521" class="LineNr">521 </span>
<span id="L522" class="LineNr">522 </span><span class="Normal">int</span> <a href='100trace_browser.cc.html#L522'>read_key</a><span class="Delimiter">()</span> <span class="Delimiter">{</span>
<span id="L523" class="LineNr">523 </span>  tb_event event<span class="Delimiter">;</span>
<span id="L524" class="LineNr">524 </span>  <span class="Normal">do</span> <span class="Delimiter">{</span>
<span id="L525" class="LineNr">525 </span>    tb_poll_event<span class="Delimiter">(</span>&amp;event<span class="Delimiter">);</span>
<span id="L526" class="LineNr">526 </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 id="L527" class="LineNr">527 </span>  <span class="Identifier">return</span> event<span class="Delimiter">.</span>key ? event<span class="Delimiter">.</span>key : event<span class="Delimiter">.</span>ch<span class="Delimiter">;</span>
<span id="L528" class="LineNr">528 </span><span class="Delimiter">}</span>
</pre>
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