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+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
+<html>
+<head>
+<meta http-equiv="content-type" content="text/html; charset=UTF-8">
+<title>Mu - subx/apps/hex.subx</title>
+<meta name="Generator" content="Vim/8.0">
+<meta name="plugin-version" content="vim7.4_v2">
+<meta name="syntax" content="none">
+<meta name="settings" content="number_lines,use_css,no_foldcolumn,expand_tabs,line_ids,prevent_copy=">
+<meta name="colorscheme" content="minimal">
+<style type="text/css">
+<!--
+pre { font-family: monospace; color: #aaaaaa; background-color: #080808; }
+body { font-size:12pt; font-family: monospace; color: #aaaaaa; background-color: #080808; }
+.subxS2Comment a { color:inherit; }
+.subxS1Comment a { color:inherit; }
+.subxComment a { color:inherit; }
+.subxH2Comment a { color:inherit; }
+.subxH1Comment a { color:inherit; }
+* { font-size:12pt; font-size: 1em; }
+.subxComment { color:#16bfff; }
+.subxS2Comment { color:#4466ff; }
+.LineNr { color:#444444; }
+.subxS1Comment { color:#2d8cff; }
+.CommentedCode { color: #6c6c6c; }
+.Constant { color:#00a0a0; }
+.subxFunction { color: #ff8700; }
+.subxTest { color: #00af00; }
+.SpecialChar { color: #ff0000; }
+.subxH1Comment { color:#00ffff; }
+-->
+</style>
+
+<script type='text/javascript'>
+<!--
+
+/* function to open any folds containing a jumped-to line before jumping to it */
+function JumpToLine()
+{
+  var lineNum;
+  lineNum = window.location.hash;
+  lineNum = lineNum.substr(1); /* strip off '#' */
+
+  if (lineNum.indexOf('L') == -1) {
+    lineNum = 'L'+lineNum;
+  }
+  lineElem = document.getElementById(lineNum);
+  /* Always jump to new location even if the line was hidden inside a fold, or
+   * we corrected the raw number to a line ID.
+   */
+  if (lineElem) {
+    lineElem.scrollIntoView(true);
+  }
+  return true;
+}
+if ('onhashchange' in window) {
+  window.onhashchange = JumpToLine;
+}
+
+-->
+</script>
+</head>
+<body onload='JumpToLine();'>
+<a href='https://github.com/akkartik/mu/blob/master/subx/apps/hex.subx'>https://github.com/akkartik/mu/blob/master/subx/apps/hex.subx</a>
+<pre id='vimCodeElement'>
+<span id="L1" class="LineNr">  1 </span><span class="subxComment"># Read a text file containing whitespace-separated ascii hex bytes from stdin,</span>
+<span id="L2" class="LineNr">  2 </span><span class="subxComment"># and convert them into a binary file.</span>
+<span id="L3" class="LineNr">  3 </span><span class="subxComment">#</span>
+<span id="L4" class="LineNr">  4 </span><span class="subxComment"># To run (from the subx/ directory):</span>
+<span id="L5" class="LineNr">  5 </span><span class="subxComment">#   $ ./subx translate *.subx apps/hex.subx -o apps/hex</span>
+<span id="L6" class="LineNr">  6 </span><span class="subxComment">#   $ echo '80 81 82  # comment'  |./subx run apps/hex  |xxd -</span>
+<span id="L7" class="LineNr">  7 </span><span class="subxComment"># Expected output:</span>
+<span id="L8" class="LineNr">  8 </span><span class="subxComment">#   09000000: 8081 82</span>
+<span id="L9" class="LineNr">  9 </span><span class="subxComment">#</span>
+<span id="L10" class="LineNr"> 10 </span><span class="subxComment"># Only hex bytes and comments are permitted. Outside of comments all words</span>
+<span id="L11" class="LineNr"> 11 </span><span class="subxComment"># must be exactly 2 characters long and contain only characters [0-9a-f]. No</span>
+<span id="L12" class="LineNr"> 12 </span><span class="subxComment"># uppercase hex.</span>
+<span id="L13" class="LineNr"> 13 </span>
+<span id="L14" class="LineNr"> 14 </span>== code
+<span id="L15" class="LineNr"> 15 </span><span class="subxComment">#   instruction                     effective address                                                   register    displacement    immediate</span>
+<span id="L16" class="LineNr"> 16 </span><span class="subxS1Comment"># . op          subop               mod             rm32          base        index         scale       r32</span>
+<span id="L17" class="LineNr"> 17 </span><span class="subxS1Comment"># . 1-3 bytes   3 bits              2 bits          3 bits        3 bits      3 bits        2 bits      2 bits      0/1/2/4 bytes   0/1/2/4 bytes</span>
+<span id="L18" class="LineNr"> 18 </span>
+<span id="L19" class="LineNr"> 19 </span>    <span class="subxComment"># for debugging: run a single test</span>
+<span id="L20" class="LineNr"> 20 </span><span class="CommentedCode">#?     e8/call test-skip-until-newline/disp32</span>
+<span id="L21" class="LineNr"> 21 </span><span class="CommentedCode">#?     8b/copy                         0/mod/indirect  5/rm32/.disp32            .             .           3/r32/EBX   Num-test-failures/disp32          # copy *Num-test-failures to EBX</span>
+<span id="L22" class="LineNr"> 22 </span><span class="CommentedCode">#?     eb/jump  $main:end/disp8</span>
+<span id="L23" class="LineNr"> 23 </span>
+<span id="L24" class="LineNr"> 24 </span><span class="subxComment"># main: run tests if necessary, convert stdin if not</span>
+<span id="L25" class="LineNr"> 25 </span>    <span class="subxS1Comment"># . prolog</span>
+<span id="L26" class="LineNr"> 26 </span>    89/copy                         3/mod/direct    5/rm32/EBP   <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>           <span class="CommentedCode"> . </span>          4/r32/ESP  <span class="CommentedCode"> . </span>             <span class="CommentedCode"> . </span>                <span class="subxComment"># copy ESP to EBP</span>
+<span id="L27" class="LineNr"> 27 </span>    <span class="subxH1Comment"># - if argc &gt; 1 and argv[1] == &quot;test&quot; then return run_tests()</span>
+<span id="L28" class="LineNr"> 28 </span>    <span class="subxS1Comment"># . argc &gt; 1</span>
+<span id="L29" class="LineNr"> 29 </span>    81          7/subop/compare     1/mod/*+disp8   4/rm32/sib    5/base/EBP  4/index/none <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>          0/disp8         1/imm32           <span class="subxComment"># compare *EBP</span>
+<span id="L30" class="LineNr"> 30 </span>    7e/jump-if-lesser-or-equal  $run-main/disp8
+<span id="L31" class="LineNr"> 31 </span>    <span class="subxS1Comment"># . argv[1] == &quot;test&quot;</span>
+<span id="L32" class="LineNr"> 32 </span>    <span class="subxS2Comment"># . . push args</span>
+<span id="L33" class="LineNr"> 33 </span>    68/push  <span class="Constant">&quot;test&quot;</span>/imm32
+<span id="L34" class="LineNr"> 34 </span>    ff          6/subop/push        1/mod/*+disp8   4/rm32/sib    5/base/EBP  4/index/none <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>          0x8/disp8      <span class="CommentedCode"> . </span>                <span class="subxComment"># push *(EBP+8)</span>
+<span id="L35" class="LineNr"> 35 </span>    <span class="subxS2Comment"># . . call</span>
+<span id="L36" class="LineNr"> 36 </span>    e8/call  kernel-string-equal/disp32
+<span id="L37" class="LineNr"> 37 </span>    <span class="subxS2Comment"># . . discard args</span>
+<span id="L38" class="LineNr"> 38 </span>    81          0/subop/add         3/mod/direct    4/rm32/ESP   <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>           <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>              8/imm32           <span class="subxComment"># add to ESP</span>
+<span id="L39" class="LineNr"> 39 </span>    <span class="subxS1Comment"># . check result</span>
+<span id="L40" class="LineNr"> 40 </span>    3d/compare-EAX  1/imm32
+<span id="L41" class="LineNr"> 41 </span>    75/jump-if-not-equal  $run-main/disp8
+<span id="L42" class="LineNr"> 42 </span>    <span class="subxS1Comment"># . run-tests()</span>
+<span id="L43" class="LineNr"> 43 </span><span class="CommentedCode">#?     e8/call test-hex-below-0/disp32</span>
+<span id="L44" class="LineNr"> 44 </span><span class="CommentedCode">#?     e8/call test-scan-next-byte/disp32</span>
+<span id="L45" class="LineNr"> 45 </span><span class="CommentedCode">#?     e8/call test-scan-next-byte-skips-comment/disp32</span>
+<span id="L46" class="LineNr"> 46 </span>    e8/call  run-tests/disp32
+<span id="L47" class="LineNr"> 47 </span>    8b/copy                         0/mod/indirect  5/rm32/.disp32           <span class="CommentedCode"> . </span>           <span class="CommentedCode"> . </span>          3/r32/EBX   <span class="SpecialChar">Num-test-failures</span>/disp32          <span class="subxComment"># copy *Num-test-failures to EBX</span>
+<span id="L48" class="LineNr"> 48 </span>    eb/jump  $main:end/disp8
+<span id="L49" class="LineNr"> 49 </span><span class="Constant">$run-main</span>:
+<span id="L50" class="LineNr"> 50 </span>    <span class="subxH1Comment"># - otherwise convert stdin</span>
+<span id="L51" class="LineNr"> 51 </span>    <span class="subxComment"># var ed/EAX : exit-descriptor</span>
+<span id="L52" class="LineNr"> 52 </span>    81          5/subop/subtract    3/mod/direct    4/rm32/ESP   <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>           <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>              8/imm32           <span class="subxComment"># subtract from ESP</span>
+<span id="L53" class="LineNr"> 53 </span>    8d/copy-address                 0/mod/indirect  4/rm32/sib    4/base/ESP  4/index/none <span class="CommentedCode"> . </span>          0/r32/EAX  <span class="CommentedCode"> . </span>             <span class="CommentedCode"> . </span>                <span class="subxComment"># copy ESP to EAX</span>
+<span id="L54" class="LineNr"> 54 </span>    <span class="subxComment"># configure ed to really exit()</span>
+<span id="L55" class="LineNr"> 55 </span>    <span class="subxS1Comment"># . ed-&gt;target = 0</span>
+<span id="L56" class="LineNr"> 56 </span>    c7/copy                         0/mod/direct    0/rm32/EAX   <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>           <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>              0/imm32           <span class="subxComment"># copy to *EAX</span>
+<span id="L57" class="LineNr"> 57 </span>    <span class="subxComment"># return convert(Stdin, 1/stdout, 2/stderr, ed)</span>
+<span id="L58" class="LineNr"> 58 </span>    <span class="subxS2Comment"># . . push args</span>
+<span id="L59" class="LineNr"> 59 </span>    50/push-EAX/ed
+<span id="L60" class="LineNr"> 60 </span>    68/push  2/imm32/stderr
+<span id="L61" class="LineNr"> 61 </span>    68/push  1/imm32/stdout
+<span id="L62" class="LineNr"> 62 </span>    68/push  <span class="SpecialChar">Stdin</span>/imm32
+<span id="L63" class="LineNr"> 63 </span>    <span class="subxS2Comment"># . . call</span>
+<span id="L64" class="LineNr"> 64 </span>    e8/call  convert/disp32
+<span id="L65" class="LineNr"> 65 </span>    <span class="subxS2Comment"># . . discard args</span>
+<span id="L66" class="LineNr"> 66 </span>    81          0/subop/add         3/mod/direct    4/rm32/ESP   <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>           <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>              0x10/imm32        <span class="subxComment"># add to ESP</span>
+<span id="L67" class="LineNr"> 67 </span>    <span class="subxS1Comment"># . syscall(exit, 0)</span>
+<span id="L68" class="LineNr"> 68 </span>    bb/copy-to-EBX  0/imm32
+<span id="L69" class="LineNr"> 69 </span><span class="Constant">$main:end</span>:
+<span id="L70" class="LineNr"> 70 </span>    b8/copy-to-EAX  1/imm32/exit
+<span id="L71" class="LineNr"> 71 </span>    cd/syscall  0x80/imm8
+<span id="L72" class="LineNr"> 72 </span>
+<span id="L73" class="LineNr"> 73 </span><span class="subxComment"># the main entry point</span>
+<span id="L74" class="LineNr"> 74 </span><span class="subxFunction">convert</span>:  <span class="subxComment"># in : (address buffered-file), out : (address buffered-file), err : (address buffered-file), ed : (address exit-descriptor) -&gt; &lt;void&gt;</span>
+<span id="L75" class="LineNr"> 75 </span>    <span class="subxComment"># pseudocode:</span>
+<span id="L76" class="LineNr"> 76 </span>    <span class="subxComment">#   repeatedly</span>
+<span id="L77" class="LineNr"> 77 </span>    <span class="subxComment">#     EAX = convert-next-hex-byte(in, err, ed)</span>
+<span id="L78" class="LineNr"> 78 </span>    <span class="subxComment">#     if EAX == 0xffffffff break  # eof</span>
+<span id="L79" class="LineNr"> 79 </span>    <span class="subxComment">#     write-byte(out, EAX)</span>
+<span id="L80" class="LineNr"> 80 </span>    <span class="subxComment">#   flush(out)</span>
+<span id="L81" class="LineNr"> 81 </span>    <span class="subxComment">#</span>
+<span id="L82" class="LineNr"> 82 </span>    <span class="subxS1Comment"># . prolog</span>
+<span id="L83" class="LineNr"> 83 </span>    55/push-EBP
+<span id="L84" class="LineNr"> 84 </span>    89/copy                         3/mod/direct    5/rm32/EBP   <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>           <span class="CommentedCode"> . </span>          4/r32/ESP  <span class="CommentedCode"> . </span>             <span class="CommentedCode"> . </span>                <span class="subxComment"># copy ESP to EBP</span>
+<span id="L85" class="LineNr"> 85 </span>    <span class="subxS1Comment"># . save registers</span>
+<span id="L86" class="LineNr"> 86 </span>    <span class="subxComment"># var buf/ECX : (address stream) on the stack</span>
+<span id="L87" class="LineNr"> 87 </span>    <span class="subxComment"># It occupies 1KB.</span>
+<span id="L88" class="LineNr"> 88 </span>    81          5/subop/subtract    3/mod/direct    4/rm32/ESP   <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>           <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>              0x400/imm32       <span class="subxComment"># subtract from ESP</span>
+<span id="L89" class="LineNr"> 89 </span>    8d/copy-address                 0/mod/indirect  4/rm32/sib    4/base/ESP  4/index/none <span class="CommentedCode"> . </span>          1/r32/ECX  <span class="CommentedCode"> . </span>             <span class="CommentedCode"> . </span>                <span class="subxComment"># copy ESP to ECX</span>
+<span id="L90" class="LineNr"> 90 </span>    <span class="subxComment"># initialize the stream</span>
+<span id="L91" class="LineNr"> 91 </span>    <span class="subxS1Comment"># . length = 1KB - 12 bytes for 'read', 'write' and 'length' fields.</span>
+<span id="L92" class="LineNr"> 92 </span>    c7/copy                         1/mod/*+disp8   1/rm32/ECX   <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>           <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>          8/disp8         0x3f4/imm32       <span class="subxComment"># copy to *(ECX+8)</span>
+<span id="L93" class="LineNr"> 93 </span>    <span class="subxS1Comment"># . clear-stream(buf)</span>
+<span id="L94" class="LineNr"> 94 </span>    <span class="subxS2Comment"># . . push args</span>
+<span id="L95" class="LineNr"> 95 </span>    51/push-ECX
+<span id="L96" class="LineNr"> 96 </span>    <span class="subxS2Comment"># . . call</span>
+<span id="L97" class="LineNr"> 97 </span>    e8/call  clear-stream/disp32
+<span id="L98" class="LineNr"> 98 </span>    <span class="subxS2Comment"># . . discard args</span>
+<span id="L99" class="LineNr"> 99 </span>    81          0/subop/add         3/mod/direct    4/rm32/ESP   <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>           <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>              4/imm32           <span class="subxComment"># add to ESP</span>
+<span id="L100" class="LineNr">100 </span><span class="Constant">$convert:loop</span>:
+<span id="L101" class="LineNr">101 </span>    <span class="subxS1Comment"># . restore registers</span>
+<span id="L102" class="LineNr">102 </span>    <span class="subxS1Comment"># . epilog</span>
+<span id="L103" class="LineNr">103 </span>    89/copy                         3/mod/direct    4/rm32/ESP   <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>           <span class="CommentedCode"> . </span>          5/r32/EBP  <span class="CommentedCode"> . </span>             <span class="CommentedCode"> . </span>                <span class="subxComment"># copy EBP to ESP</span>
+<span id="L104" class="LineNr">104 </span>    5d/pop-to-EBP
+<span id="L105" class="LineNr">105 </span>    c3/return
+<span id="L106" class="LineNr">106 </span>
+<span id="L107" class="LineNr">107 </span><span class="subxComment"># read bytes from 'in' until a sequence of two lowercase hex characters (0-9, a-f)</span>
+<span id="L108" class="LineNr">108 </span><span class="subxComment"># skip spaces and newlines</span>
+<span id="L109" class="LineNr">109 </span><span class="subxComment"># on '#' skip bytes until newline</span>
+<span id="L110" class="LineNr">110 </span><span class="subxComment"># raise an error and abort on all other unexpected bytes</span>
+<span id="L111" class="LineNr">111 </span><span class="subxComment"># return the binary value of the two hex characters in EAX</span>
+<span id="L112" class="LineNr">112 </span><span class="subxComment"># return 0xffffffff on end of file</span>
+<span id="L113" class="LineNr">113 </span><span class="subxFunction">convert-next-hex-byte</span>:  <span class="subxComment"># in : (address buffered-file), err : (address buffered-file), ed : (address exit-descriptor) -&gt; byte-or-eof/EAX</span>
+<span id="L114" class="LineNr">114 </span>    <span class="subxComment"># pseudocode:</span>
+<span id="L115" class="LineNr">115 </span>    <span class="subxComment">#   EAX = scan-next-byte(in, err, ed)</span>
+<span id="L116" class="LineNr">116 </span>    <span class="subxComment">#   if (EAX == 0xffffffff) return</span>
+<span id="L117" class="LineNr">117 </span>    <span class="subxComment">#   ECX = EAX</span>
+<span id="L118" class="LineNr">118 </span>    <span class="subxComment">#   EAX = scan-next-byte(in, err, ed)</span>
+<span id="L119" class="LineNr">119 </span>    <span class="subxComment">#   if (EAX == 0xffffffff) error(&quot;partial byte found&quot;)</span>
+<span id="L120" class="LineNr">120 </span>    <span class="subxComment">#   ECX = (ECX &lt;&lt; 8) | EAX</span>
+<span id="L121" class="LineNr">121 </span>    <span class="subxComment">#   return</span>
+<span id="L122" class="LineNr">122 </span>    <span class="subxComment">#</span>
+<span id="L123" class="LineNr">123 </span>    <span class="subxS1Comment"># . prolog</span>
+<span id="L124" class="LineNr">124 </span>    55/push-EBP
+<span id="L125" class="LineNr">125 </span>    89/copy                         3/mod/direct    5/rm32/EBP   <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>           <span class="CommentedCode"> . </span>          4/r32/ESP  <span class="CommentedCode"> . </span>             <span class="CommentedCode"> . </span>                <span class="subxComment"># copy ESP to EBP</span>
+<span id="L126" class="LineNr">126 </span>    <span class="subxS1Comment"># . save registers</span>
+<span id="L127" class="LineNr">127 </span>    <span class="subxComment"># var buf/ECX : (address stream) on the stack</span>
+<span id="L128" class="LineNr">128 </span>    <span class="subxComment"># It occupies 1KB.</span>
+<span id="L129" class="LineNr">129 </span>    81          5/subop/subtract    3/mod/direct    4/rm32/ESP   <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>           <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>              0x400/imm32       <span class="subxComment"># subtract from ESP</span>
+<span id="L130" class="LineNr">130 </span>    8d/copy-address                 0/mod/indirect  4/rm32/sib    4/base/ESP  4/index/none <span class="CommentedCode"> . </span>          1/r32/ECX  <span class="CommentedCode"> . </span>             <span class="CommentedCode"> . </span>                <span class="subxComment"># copy ESP to ECX</span>
+<span id="L131" class="LineNr">131 </span>    <span class="subxComment"># initialize the stream</span>
+<span id="L132" class="LineNr">132 </span>    <span class="subxS1Comment"># . length = 1KB - 12 bytes for 'read', 'write' and 'length' fields.</span>
+<span id="L133" class="LineNr">133 </span>    c7/copy                         1/mod/*+disp8   1/rm32/ECX   <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>           <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>          8/disp8         0x3f4/imm32       <span class="subxComment"># copy to *(ECX+8)</span>
+<span id="L134" class="LineNr">134 </span>    <span class="subxS1Comment"># . clear-stream(buf)</span>
+<span id="L135" class="LineNr">135 </span>    <span class="subxS2Comment"># . . push args</span>
+<span id="L136" class="LineNr">136 </span>    51/push-ECX
+<span id="L137" class="LineNr">137 </span>    <span class="subxS2Comment"># . . call</span>
+<span id="L138" class="LineNr">138 </span>    e8/call  clear-stream/disp32
+<span id="L139" class="LineNr">139 </span>    <span class="subxS2Comment"># . . discard args</span>
+<span id="L140" class="LineNr">140 </span>    81          0/subop/add         3/mod/direct    4/rm32/ESP   <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>           <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>              4/imm32           <span class="subxComment"># add to ESP</span>
+<span id="L141" class="LineNr">141 </span><span class="Constant">$convert:loop</span>:
+<span id="L142" class="LineNr">142 </span>    <span class="subxS1Comment"># . restore registers</span>
+<span id="L143" class="LineNr">143 </span>    <span class="subxS1Comment"># . epilog</span>
+<span id="L144" class="LineNr">144 </span>    89/copy                         3/mod/direct    4/rm32/ESP   <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>           <span class="CommentedCode"> . </span>          5/r32/EBP  <span class="CommentedCode"> . </span>             <span class="CommentedCode"> . </span>                <span class="subxComment"># copy EBP to ESP</span>
+<span id="L145" class="LineNr">145 </span>    5d/pop-to-EBP
+<span id="L146" class="LineNr">146 </span>    c3/return
+<span id="L147" class="LineNr">147 </span>
+<span id="L148" class="LineNr">148 </span><span class="subxComment"># read whitespace until a hex byte, and return it</span>
+<span id="L149" class="LineNr">149 </span><span class="subxComment"># return 0xffffffff if file ends without finding a hex byte</span>
+<span id="L150" class="LineNr">150 </span><span class="subxComment"># on '#' skip all bytes until newline</span>
+<span id="L151" class="LineNr">151 </span><span class="subxComment"># abort on any other byte</span>
+<span id="L152" class="LineNr">152 </span><span class="subxFunction">scan-next-byte</span>:  <span class="subxComment"># in : (address buffered-file), err : (address buffered-file), ed : (address exit-descriptor) -&gt; byte-or-eof/EAX</span>
+<span id="L153" class="LineNr">153 </span>    <span class="subxComment"># pseudocode:</span>
+<span id="L154" class="LineNr">154 </span>    <span class="subxComment">#   repeatedly</span>
+<span id="L155" class="LineNr">155 </span>    <span class="subxComment">#     EAX = read-byte(in)</span>
+<span id="L156" class="LineNr">156 </span>    <span class="subxComment">#     if is-hex-lowercase-byte?(EAX) return EAX</span>
+<span id="L157" class="LineNr">157 </span>    <span class="subxComment">#     if EAX == 0x20 continue</span>
+<span id="L158" class="LineNr">158 </span>    <span class="subxComment">#     if EAX == '#' skip-until-newline(in)</span>
+<span id="L159" class="LineNr">159 </span>    <span class="subxComment">#     else error-byte(ed, err, &quot;unexpected byte: &quot; EAX)</span>
+<span id="L160" class="LineNr">160 </span>    <span class="subxComment">#   return 0xffffffff</span>
+<span id="L161" class="LineNr">161 </span>    <span class="subxComment">#</span>
+<span id="L162" class="LineNr">162 </span>    <span class="subxS1Comment"># . prolog</span>
+<span id="L163" class="LineNr">163 </span>    55/push-EBP
+<span id="L164" class="LineNr">164 </span>    89/copy                         3/mod/direct    5/rm32/EBP   <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>           <span class="CommentedCode"> . </span>          4/r32/ESP  <span class="CommentedCode"> . </span>             <span class="CommentedCode"> . </span>                <span class="subxComment"># copy ESP to EBP</span>
+<span id="L165" class="LineNr">165 </span>    <span class="subxS1Comment"># . save registers</span>
+<span id="L166" class="LineNr">166 </span><span class="Constant">$scan-next-byte:loop</span>:
+<span id="L167" class="LineNr">167 </span>    <span class="subxComment"># EAX = read-byte(in)</span>
+<span id="L168" class="LineNr">168 </span>    <span class="subxS2Comment"># . . push args</span>
+<span id="L169" class="LineNr">169 </span>    ff          6/subop/push        1/mod/*+disp8   4/rm32/sib    5/base/EBP  4/index/none <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>          0x8/disp8      <span class="CommentedCode"> . </span>                <span class="subxComment"># push *(EBP+8)</span>
+<span id="L170" class="LineNr">170 </span>    <span class="subxS2Comment"># . . call</span>
+<span id="L171" class="LineNr">171 </span>    e8/call  read-byte/disp32
+<span id="L172" class="LineNr">172 </span>    <span class="subxS2Comment"># . . discard args</span>
+<span id="L173" class="LineNr">173 </span>    81          0/subop/add         3/mod/direct    4/rm32/ESP   <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>           <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>              4/imm32           <span class="subxComment"># add to ESP</span>
+<span id="L174" class="LineNr">174 </span>    <span class="subxComment"># if is-hex-lowercase-byte?(EAX) return EAX</span>
+<span id="L175" class="LineNr">175 </span>    <span class="subxS1Comment"># . save EAX for now</span>
+<span id="L176" class="LineNr">176 </span>    50/push-EAX
+<span id="L177" class="LineNr">177 </span>    <span class="subxS1Comment"># . is-hex-lowercase-byte?(EAX)</span>
+<span id="L178" class="LineNr">178 </span>    <span class="subxS2Comment"># . . push args</span>
+<span id="L179" class="LineNr">179 </span>    50/push-EAX
+<span id="L180" class="LineNr">180 </span>    <span class="subxS2Comment"># . . call</span>
+<span id="L181" class="LineNr">181 </span>    e8/call  is-hex-lowercase-byte?/disp32
+<span id="L182" class="LineNr">182 </span>    <span class="subxS2Comment"># . . discard args</span>
+<span id="L183" class="LineNr">183 </span>    81          0/subop/add         3/mod/direct    4/rm32/ESP   <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>           <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>              4/imm32           <span class="subxComment"># add to ESP</span>
+<span id="L184" class="LineNr">184 </span>    <span class="subxS1Comment"># . compare with 'false'</span>
+<span id="L185" class="LineNr">185 </span>    81          7/subop/compare     3/mod/direct    0/rm32/EAX   <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>           <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>              0/imm32           <span class="subxComment"># compare EAX</span>
+<span id="L186" class="LineNr">186 </span>    <span class="subxS1Comment"># . restore EAX (does not affect flags)</span>
+<span id="L187" class="LineNr">187 </span>    58/pop-to-EAX
+<span id="L188" class="LineNr">188 </span>    <span class="subxS1Comment"># . check whether to return</span>
+<span id="L189" class="LineNr">189 </span>    75/jump-if-not-equal  $scan-next-byte:end/disp8
+<span id="L190" class="LineNr">190 </span><span class="Constant">$scan-next-byte:check1</span>:
+<span id="L191" class="LineNr">191 </span>    <span class="subxComment"># if EAX == ' ' continue</span>
+<span id="L192" class="LineNr">192 </span>    81          7/subop/compare     3/mod/direct    0/rm32/EAX   <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>           <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>              0x20/imm32        <span class="subxComment"># compare EAX</span>
+<span id="L193" class="LineNr">193 </span>    74/jump-if-equal  $scan-next-byte:loop/disp8
+<span id="L194" class="LineNr">194 </span><span class="Constant">$aa</span>:
+<span id="L195" class="LineNr">195 </span>    <span class="subxComment"># if EAX == '\t' continue</span>
+<span id="L196" class="LineNr">196 </span>    81          7/subop/compare     3/mod/direct    0/rm32/EAX   <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>           <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>              0x9/imm32         <span class="subxComment"># compare EAX</span>
+<span id="L197" class="LineNr">197 </span>    74/jump-if-equal  $scan-next-byte:loop/disp8
+<span id="L198" class="LineNr">198 </span><span class="Constant">$bb</span>:
+<span id="L199" class="LineNr">199 </span>    <span class="subxComment"># if EAX == '\n' continue</span>
+<span id="L200" class="LineNr">200 </span>    81          7/subop/compare     3/mod/direct    0/rm32/EAX   <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>           <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>              0xa/imm32         <span class="subxComment"># compare EAX</span>
+<span id="L201" class="LineNr">201 </span>    74/jump-if-equal  $scan-next-byte:loop/disp8
+<span id="L202" class="LineNr">202 </span><span class="Constant">$scan-next-byte:check2</span>:
+<span id="L203" class="LineNr">203 </span>    <span class="subxComment"># if EAX == '#' skip-until-newline(in)</span>
+<span id="L204" class="LineNr">204 </span>    3d/compare-with-EAX  0x23/imm32
+<span id="L205" class="LineNr">205 </span>    75/jump-if-not-equal  $scan-next-byte:check3/disp8
+<span id="L206" class="LineNr">206 </span><span class="Constant">$cc</span>:
+<span id="L207" class="LineNr">207 </span>    <span class="subxS1Comment"># . skip-until-newline(in)</span>
+<span id="L208" class="LineNr">208 </span>    <span class="subxS2Comment"># . . push args</span>
+<span id="L209" class="LineNr">209 </span>    ff          6/subop/push        1/mod/*+disp8   4/rm32/sib    5/base/EBP  4/index/none <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>          0x8/disp8      <span class="CommentedCode"> . </span>                <span class="subxComment"># push *(EBP+8)</span>
+<span id="L210" class="LineNr">210 </span>    <span class="subxS2Comment"># . . call</span>
+<span id="L211" class="LineNr">211 </span>    e8/call  skip-until-newline/disp32
+<span id="L212" class="LineNr">212 </span>    <span class="subxS2Comment"># . . discard args</span>
+<span id="L213" class="LineNr">213 </span>    81          0/subop/add         3/mod/direct    4/rm32/ESP   <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>           <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>              4/imm32           <span class="subxComment"># add to ESP</span>
+<span id="L214" class="LineNr">214 </span>    eb/jump  $scan-next-byte:loop/disp8
+<span id="L215" class="LineNr">215 </span><span class="Constant">$scan-next-byte:check3</span>:
+<span id="L216" class="LineNr">216 </span><span class="subxComment"># TODO: error-byte takes a buffered-file, not a (fd or (address stream))</span>
+<span id="L217" class="LineNr">217 </span>    <span class="subxComment"># otherwise error-byte(ed, err, msg, EAX)</span>
+<span id="L218" class="LineNr">218 </span>    <span class="subxS2Comment"># . . push args</span>
+<span id="L219" class="LineNr">219 </span>    50/push-EAX
+<span id="L220" class="LineNr">220 </span>    68/push  <span class="Constant">&quot;scan-next-byte: invalid byte&quot;</span>/imm32
+<span id="L221" class="LineNr">221 </span>    ff          6/subop/push        1/mod/*+disp8   4/rm32/sib    5/base/EBP  4/index/none <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>          0xc/disp8      <span class="CommentedCode"> . </span>                <span class="subxComment"># push *(EBP+12)</span>
+<span id="L222" class="LineNr">222 </span>    ff          6/subop/push        1/mod/*+disp8   4/rm32/sib    5/base/EBP  4/index/none <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>          0x10/disp8     <span class="CommentedCode"> . </span>                <span class="subxComment"># push *(EBP+16)</span>
+<span id="L223" class="LineNr">223 </span>    <span class="subxS2Comment"># . . call</span>
+<span id="L224" class="LineNr">224 </span>    e8/call  error-byte/disp32  <span class="subxComment"># never returns</span>
+<span id="L225" class="LineNr">225 </span><span class="Constant">$scan-next-byte:end</span>:
+<span id="L226" class="LineNr">226 </span>    <span class="subxS1Comment"># . restore registers</span>
+<span id="L227" class="LineNr">227 </span>    <span class="subxS1Comment"># . epilog</span>
+<span id="L228" class="LineNr">228 </span>    89/copy                         3/mod/direct    4/rm32/ESP   <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>           <span class="CommentedCode"> . </span>          5/r32/EBP  <span class="CommentedCode"> . </span>             <span class="CommentedCode"> . </span>                <span class="subxComment"># copy EBP to ESP</span>
+<span id="L229" class="LineNr">229 </span>    5d/pop-to-EBP
+<span id="L230" class="LineNr">230 </span>    c3/return
+<span id="L231" class="LineNr">231 </span>
+<span id="L232" class="LineNr">232 </span><span class="subxTest">test-scan-next-byte</span>:
+<span id="L233" class="LineNr">233 </span>    <span class="subxH1Comment"># - check that the first two bytes of the input are assembled into the resulting number</span>
+<span id="L234" class="LineNr">234 </span>    <span class="subxComment"># setup</span>
+<span id="L235" class="LineNr">235 </span>    <span class="subxS1Comment"># . clear-stream(_test-stream)</span>
+<span id="L236" class="LineNr">236 </span>    <span class="subxS2Comment"># . . push args</span>
+<span id="L237" class="LineNr">237 </span>    68/push  _test-stream/imm32
+<span id="L238" class="LineNr">238 </span>    <span class="subxS2Comment"># . . call</span>
+<span id="L239" class="LineNr">239 </span>    e8/call  clear-stream/disp32
+<span id="L240" class="LineNr">240 </span>    <span class="subxS2Comment"># . . discard args</span>
+<span id="L241" class="LineNr">241 </span>    81          0/subop/add         3/mod/direct    4/rm32/ESP   <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>           <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>              4/imm32           <span class="subxComment"># add to ESP</span>
+<span id="L242" class="LineNr">242 </span>    <span class="subxS1Comment"># . clear-stream(_test-buffered-file+4)</span>
+<span id="L243" class="LineNr">243 </span>    <span class="subxS2Comment"># . . push args</span>
+<span id="L244" class="LineNr">244 </span>    b8/copy-to-EAX  _test-buffered-file/imm32
+<span id="L245" class="LineNr">245 </span>    05/add-to-EAX  4/imm32
+<span id="L246" class="LineNr">246 </span>    50/push-EAX
+<span id="L247" class="LineNr">247 </span>    <span class="subxS2Comment"># . . call</span>
+<span id="L248" class="LineNr">248 </span>    e8/call  clear-stream/disp32
+<span id="L249" class="LineNr">249 </span>    <span class="subxS2Comment"># . . discard args</span>
+<span id="L250" class="LineNr">250 </span>    81          0/subop/add         3/mod/direct    4/rm32/ESP   <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>           <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>              4/imm32           <span class="subxComment"># add to ESP</span>
+<span id="L251" class="LineNr">251 </span>    <span class="subxComment"># initialize '_test-stream' to &quot;abc&quot;</span>
+<span id="L252" class="LineNr">252 </span>    <span class="subxS1Comment"># . write(_test-stream, &quot;abc&quot;)</span>
+<span id="L253" class="LineNr">253 </span>    <span class="subxS2Comment"># . . push args</span>
+<span id="L254" class="LineNr">254 </span>    68/push  <span class="Constant">&quot;abc&quot;</span>/imm32
+<span id="L255" class="LineNr">255 </span>    68/push  _test-stream/imm32
+<span id="L256" class="LineNr">256 </span>    <span class="subxS2Comment"># . . call</span>
+<span id="L257" class="LineNr">257 </span>    e8/call  write/disp32
+<span id="L258" class="LineNr">258 </span>    <span class="subxS2Comment"># . . discard args</span>
+<span id="L259" class="LineNr">259 </span>    81          0/subop/add         3/mod/direct    4/rm32/ESP   <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>           <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>              8/imm32           <span class="subxComment"># add to ESP</span>
+<span id="L260" class="LineNr">260 </span>    <span class="subxComment"># scan-next-byte(_test-buffered-file)</span>
+<span id="L261" class="LineNr">261 </span>    <span class="subxS2Comment"># . . push args</span>
+<span id="L262" class="LineNr">262 </span>    68/push  _test-buffered-file/imm32
+<span id="L263" class="LineNr">263 </span>    <span class="subxS2Comment"># . . call</span>
+<span id="L264" class="LineNr">264 </span>    e8/call  scan-next-byte/disp32
+<span id="L265" class="LineNr">265 </span>    <span class="subxS2Comment"># . . discard args</span>
+<span id="L266" class="LineNr">266 </span>    81          0/subop/add         3/mod/direct    4/rm32/ESP   <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>           <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>              4/imm32           <span class="subxComment"># add to ESP</span>
+<span id="L267" class="LineNr">267 </span>    <span class="subxComment"># check-ints-equal(EAX, 0x61/a, msg)</span>
+<span id="L268" class="LineNr">268 </span>    <span class="subxS2Comment"># . . push args</span>
+<span id="L269" class="LineNr">269 </span>    68/push  <span class="Constant">&quot;F - test-scan-next-byte&quot;</span>/imm32
+<span id="L270" class="LineNr">270 </span>    68/push  0x61/imm32/a
+<span id="L271" class="LineNr">271 </span>    50/push-EAX
+<span id="L272" class="LineNr">272 </span>    <span class="subxS2Comment"># . . call</span>
+<span id="L273" class="LineNr">273 </span>    e8/call  check-ints-equal/disp32
+<span id="L274" class="LineNr">274 </span>    <span class="subxS2Comment"># . . discard args</span>
+<span id="L275" class="LineNr">275 </span>    81          0/subop/add         3/mod/direct    4/rm32/ESP   <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>           <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>              0xc/imm32         <span class="subxComment"># add to ESP</span>
+<span id="L276" class="LineNr">276 </span>    <span class="subxS1Comment"># . end</span>
+<span id="L277" class="LineNr">277 </span>    c3/return
+<span id="L278" class="LineNr">278 </span>
+<span id="L279" class="LineNr">279 </span><span class="subxTest">test-scan-next-byte-skips-whitespace</span>:
+<span id="L280" class="LineNr">280 </span>    <span class="subxH1Comment"># - check that the first two bytes of the input are assembled into the resulting number</span>
+<span id="L281" class="LineNr">281 </span>    <span class="subxComment"># setup</span>
+<span id="L282" class="LineNr">282 </span>    <span class="subxS1Comment"># . clear-stream(_test-stream)</span>
+<span id="L283" class="LineNr">283 </span>    <span class="subxS2Comment"># . . push args</span>
+<span id="L284" class="LineNr">284 </span>    68/push  _test-stream/imm32
+<span id="L285" class="LineNr">285 </span>    <span class="subxS2Comment"># . . call</span>
+<span id="L286" class="LineNr">286 </span>    e8/call  clear-stream/disp32
+<span id="L287" class="LineNr">287 </span>    <span class="subxS2Comment"># . . discard args</span>
+<span id="L288" class="LineNr">288 </span>    81          0/subop/add         3/mod/direct    4/rm32/ESP   <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>           <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>              4/imm32           <span class="subxComment"># add to ESP</span>
+<span id="L289" class="LineNr">289 </span>    <span class="subxS1Comment"># . clear-stream(_test-buffered-file+4)</span>
+<span id="L290" class="LineNr">290 </span>    <span class="subxS2Comment"># . . push args</span>
+<span id="L291" class="LineNr">291 </span>    b8/copy-to-EAX  _test-buffered-file/imm32
+<span id="L292" class="LineNr">292 </span>    05/add-to-EAX  4/imm32
+<span id="L293" class="LineNr">293 </span>    50/push-EAX
+<span id="L294" class="LineNr">294 </span>    <span class="subxS2Comment"># . . call</span>
+<span id="L295" class="LineNr">295 </span>    e8/call  clear-stream/disp32
+<span id="L296" class="LineNr">296 </span>    <span class="subxS2Comment"># . . discard args</span>
+<span id="L297" class="LineNr">297 </span>    81          0/subop/add         3/mod/direct    4/rm32/ESP   <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>           <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>              4/imm32           <span class="subxComment"># add to ESP</span>
+<span id="L298" class="LineNr">298 </span>    <span class="subxComment"># initialize '_test-stream' to input with leading whitespace</span>
+<span id="L299" class="LineNr">299 </span>    <span class="subxS1Comment"># . write(_test-stream, text)</span>
+<span id="L300" class="LineNr">300 </span>    <span class="subxS2Comment"># . . push args</span>
+<span id="L301" class="LineNr">301 </span>    68/push  <span class="Constant">&quot;  abc&quot;</span>/imm32
+<span id="L302" class="LineNr">302 </span>    68/push  _test-stream/imm32
+<span id="L303" class="LineNr">303 </span>    <span class="subxS2Comment"># . . call</span>
+<span id="L304" class="LineNr">304 </span>    e8/call  write/disp32
+<span id="L305" class="LineNr">305 </span>    <span class="subxS2Comment"># . . discard args</span>
+<span id="L306" class="LineNr">306 </span>    81          0/subop/add         3/mod/direct    4/rm32/ESP   <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>           <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>              8/imm32           <span class="subxComment"># add to ESP</span>
+<span id="L307" class="LineNr">307 </span>    <span class="subxComment"># scan-next-byte(_test-buffered-file)</span>
+<span id="L308" class="LineNr">308 </span>    <span class="subxS2Comment"># . . push args</span>
+<span id="L309" class="LineNr">309 </span>    68/push  _test-buffered-file/imm32
+<span id="L310" class="LineNr">310 </span>    <span class="subxS2Comment"># . . call</span>
+<span id="L311" class="LineNr">311 </span>    e8/call  scan-next-byte/disp32
+<span id="L312" class="LineNr">312 </span>    <span class="subxS2Comment"># . . discard args</span>
+<span id="L313" class="LineNr">313 </span>    81          0/subop/add         3/mod/direct    4/rm32/ESP   <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>           <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>              4/imm32           <span class="subxComment"># add to ESP</span>
+<span id="L314" class="LineNr">314 </span>    <span class="subxComment"># check-ints-equal(EAX, 0x61/a, msg)</span>
+<span id="L315" class="LineNr">315 </span>    <span class="subxS2Comment"># . . push args</span>
+<span id="L316" class="LineNr">316 </span>    68/push  <span class="Constant">&quot;F - test-scan-next-byte-skips-whitespace&quot;</span>/imm32
+<span id="L317" class="LineNr">317 </span>    68/push  0x61/imm32/a
+<span id="L318" class="LineNr">318 </span>    50/push-EAX
+<span id="L319" class="LineNr">319 </span>    <span class="subxS2Comment"># . . call</span>
+<span id="L320" class="LineNr">320 </span>    e8/call  check-ints-equal/disp32
+<span id="L321" class="LineNr">321 </span>    <span class="subxS2Comment"># . . discard args</span>
+<span id="L322" class="LineNr">322 </span>    81          0/subop/add         3/mod/direct    4/rm32/ESP   <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>           <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>              0xc/imm32         <span class="subxComment"># add to ESP</span>
+<span id="L323" class="LineNr">323 </span>    <span class="subxS1Comment"># . end</span>
+<span id="L324" class="LineNr">324 </span>    c3/return
+<span id="L325" class="LineNr">325 </span>
+<span id="L326" class="LineNr">326 </span><span class="subxTest">test-scan-next-byte-skips-comment</span>:
+<span id="L327" class="LineNr">327 </span>    <span class="subxH1Comment"># - check that the first two bytes of the input are assembled into the resulting number</span>
+<span id="L328" class="LineNr">328 </span>    <span class="subxComment"># setup</span>
+<span id="L329" class="LineNr">329 </span>    <span class="subxS1Comment"># . clear-stream(_test-stream)</span>
+<span id="L330" class="LineNr">330 </span>    <span class="subxS2Comment"># . . push args</span>
+<span id="L331" class="LineNr">331 </span>    68/push  _test-stream/imm32
+<span id="L332" class="LineNr">332 </span>    <span class="subxS2Comment"># . . call</span>
+<span id="L333" class="LineNr">333 </span>    e8/call  clear-stream/disp32
+<span id="L334" class="LineNr">334 </span>    <span class="subxS2Comment"># . . discard args</span>
+<span id="L335" class="LineNr">335 </span>    81          0/subop/add         3/mod/direct    4/rm32/ESP   <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>           <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>              4/imm32           <span class="subxComment"># add to ESP</span>
+<span id="L336" class="LineNr">336 </span>    <span class="subxS1Comment"># . clear-stream(_test-buffered-file+4)</span>
+<span id="L337" class="LineNr">337 </span>    <span class="subxS2Comment"># . . push args</span>
+<span id="L338" class="LineNr">338 </span>    b8/copy-to-EAX  _test-buffered-file/imm32
+<span id="L339" class="LineNr">339 </span>    05/add-to-EAX  4/imm32
+<span id="L340" class="LineNr">340 </span>    50/push-EAX
+<span id="L341" class="LineNr">341 </span>    <span class="subxS2Comment"># . . call</span>
+<span id="L342" class="LineNr">342 </span>    e8/call  clear-stream/disp32
+<span id="L343" class="LineNr">343 </span>    <span class="subxS2Comment"># . . discard args</span>
+<span id="L344" class="LineNr">344 </span>    81          0/subop/add         3/mod/direct    4/rm32/ESP   <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>           <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>              4/imm32           <span class="subxComment"># add to ESP</span>
+<span id="L345" class="LineNr">345 </span>    <span class="subxComment"># initialize '_test-stream' to input with leading comment</span>
+<span id="L346" class="LineNr">346 </span>    <span class="subxS1Comment"># . write(_test-stream, comment)</span>
+<span id="L347" class="LineNr">347 </span>    <span class="subxS2Comment"># . . push args</span>
+<span id="L348" class="LineNr">348 </span>    68/push  <span class="Constant">&quot;#x&quot;</span>/imm32
+<span id="L349" class="LineNr">349 </span>    68/push  _test-stream/imm32
+<span id="L350" class="LineNr">350 </span>    <span class="subxS2Comment"># . . call</span>
+<span id="L351" class="LineNr">351 </span>    e8/call  write/disp32
+<span id="L352" class="LineNr">352 </span>    <span class="subxS2Comment"># . . discard args</span>
+<span id="L353" class="LineNr">353 </span>    81          0/subop/add         3/mod/direct    4/rm32/ESP   <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>           <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>              8/imm32           <span class="subxComment"># add to ESP</span>
+<span id="L354" class="LineNr">354 </span>    <span class="subxS1Comment"># . write(_test-stream, Newline)</span>
+<span id="L355" class="LineNr">355 </span>    <span class="subxS2Comment"># . . push args</span>
+<span id="L356" class="LineNr">356 </span>    68/push  <span class="SpecialChar">Newline</span>/imm32
+<span id="L357" class="LineNr">357 </span>    68/push  _test-stream/imm32
+<span id="L358" class="LineNr">358 </span>    <span class="subxS2Comment"># . . call</span>
+<span id="L359" class="LineNr">359 </span>    e8/call  write/disp32
+<span id="L360" class="LineNr">360 </span>    <span class="subxS2Comment"># . . discard args</span>
+<span id="L361" class="LineNr">361 </span>    81          0/subop/add         3/mod/direct    4/rm32/ESP   <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>           <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>              8/imm32           <span class="subxComment"># add to ESP</span>
+<span id="L362" class="LineNr">362 </span>    <span class="subxS1Comment"># . write(_test-stream, real text)</span>
+<span id="L363" class="LineNr">363 </span>    <span class="subxS2Comment"># . . push args</span>
+<span id="L364" class="LineNr">364 </span>    68/push  <span class="Constant">&quot;ab&quot;</span>/imm32
+<span id="L365" class="LineNr">365 </span>    68/push  _test-stream/imm32
+<span id="L366" class="LineNr">366 </span>    <span class="subxS2Comment"># . . call</span>
+<span id="L367" class="LineNr">367 </span>    e8/call  write/disp32
+<span id="L368" class="LineNr">368 </span>    <span class="subxS2Comment"># . . discard args</span>
+<span id="L369" class="LineNr">369 </span>    81          0/subop/add         3/mod/direct    4/rm32/ESP   <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>           <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>              8/imm32           <span class="subxComment"># add to ESP</span>
+<span id="L370" class="LineNr">370 </span>    <span class="subxComment"># scan-next-byte(_test-buffered-file)</span>
+<span id="L371" class="LineNr">371 </span>    <span class="subxS2Comment"># . . push args</span>
+<span id="L372" class="LineNr">372 </span>    68/push  _test-buffered-file/imm32
+<span id="L373" class="LineNr">373 </span>    <span class="subxS2Comment"># . . call</span>
+<span id="L374" class="LineNr">374 </span>    e8/call  scan-next-byte/disp32
+<span id="L375" class="LineNr">375 </span>    <span class="subxS2Comment"># . . discard args</span>
+<span id="L376" class="LineNr">376 </span>    81          0/subop/add         3/mod/direct    4/rm32/ESP   <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>           <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>              4/imm32           <span class="subxComment"># add to ESP</span>
+<span id="L377" class="LineNr">377 </span>    <span class="subxComment"># check-ints-equal(EAX, 0x61/a, msg)</span>
+<span id="L378" class="LineNr">378 </span>    <span class="subxS2Comment"># . . push args</span>
+<span id="L379" class="LineNr">379 </span>    68/push  <span class="Constant">&quot;F - test-scan-next-byte-skips-comment&quot;</span>/imm32
+<span id="L380" class="LineNr">380 </span>    68/push  0x61/imm32/a
+<span id="L381" class="LineNr">381 </span>    50/push-EAX
+<span id="L382" class="LineNr">382 </span>    <span class="subxS2Comment"># . . call</span>
+<span id="L383" class="LineNr">383 </span>    e8/call  check-ints-equal/disp32
+<span id="L384" class="LineNr">384 </span>    <span class="subxS2Comment"># . . discard args</span>
+<span id="L385" class="LineNr">385 </span>    81          0/subop/add         3/mod/direct    4/rm32/ESP   <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>           <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>              0xc/imm32         <span class="subxComment"># add to ESP</span>
+<span id="L386" class="LineNr">386 </span>    <span class="subxS1Comment"># . end</span>
+<span id="L387" class="LineNr">387 </span>    c3/return
+<span id="L388" class="LineNr">388 </span>
+<span id="L389" class="LineNr">389 </span><span class="subxTest">test-scan-next-byte-skips-comment-and-whitespace</span>:
+<span id="L390" class="LineNr">390 </span>    <span class="subxH1Comment"># - check that the first two bytes of the input are assembled into the resulting number</span>
+<span id="L391" class="LineNr">391 </span>    <span class="subxComment"># setup</span>
+<span id="L392" class="LineNr">392 </span>    <span class="subxS1Comment"># . clear-stream(_test-stream)</span>
+<span id="L393" class="LineNr">393 </span>    <span class="subxS2Comment"># . . push args</span>
+<span id="L394" class="LineNr">394 </span>    68/push  _test-stream/imm32
+<span id="L395" class="LineNr">395 </span>    <span class="subxS2Comment"># . . call</span>
+<span id="L396" class="LineNr">396 </span>    e8/call  clear-stream/disp32
+<span id="L397" class="LineNr">397 </span>    <span class="subxS2Comment"># . . discard args</span>
+<span id="L398" class="LineNr">398 </span>    81          0/subop/add         3/mod/direct    4/rm32/ESP   <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>           <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>              4/imm32           <span class="subxComment"># add to ESP</span>
+<span id="L399" class="LineNr">399 </span>    <span class="subxS1Comment"># . clear-stream(_test-buffered-file+4)</span>
+<span id="L400" class="LineNr">400 </span>    <span class="subxS2Comment"># . . push args</span>
+<span id="L401" class="LineNr">401 </span>    b8/copy-to-EAX  _test-buffered-file/imm32
+<span id="L402" class="LineNr">402 </span>    05/add-to-EAX  4/imm32
+<span id="L403" class="LineNr">403 </span>    50/push-EAX
+<span id="L404" class="LineNr">404 </span>    <span class="subxS2Comment"># . . call</span>
+<span id="L405" class="LineNr">405 </span>    e8/call  clear-stream/disp32
+<span id="L406" class="LineNr">406 </span>    <span class="subxS2Comment"># . . discard args</span>
+<span id="L407" class="LineNr">407 </span>    81          0/subop/add         3/mod/direct    4/rm32/ESP   <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>           <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>              4/imm32           <span class="subxComment"># add to ESP</span>
+<span id="L408" class="LineNr">408 </span>    <span class="subxComment"># initialize '_test-stream' to input with leading comment and more whitespace after newline</span>
+<span id="L409" class="LineNr">409 </span>    <span class="subxS1Comment"># . write(_test-stream, comment)</span>
+<span id="L410" class="LineNr">410 </span>    <span class="subxS2Comment"># . . push args</span>
+<span id="L411" class="LineNr">411 </span>    68/push  <span class="Constant">&quot;#x&quot;</span>/imm32
+<span id="L412" class="LineNr">412 </span>    68/push  _test-stream/imm32
+<span id="L413" class="LineNr">413 </span>    <span class="subxS2Comment"># . . call</span>
+<span id="L414" class="LineNr">414 </span>    e8/call  write/disp32
+<span id="L415" class="LineNr">415 </span>    <span class="subxS2Comment"># . . discard args</span>
+<span id="L416" class="LineNr">416 </span>    81          0/subop/add         3/mod/direct    4/rm32/ESP   <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>           <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>              8/imm32           <span class="subxComment"># add to ESP</span>
+<span id="L417" class="LineNr">417 </span>    <span class="subxS1Comment"># . write(_test-stream, Newline)</span>
+<span id="L418" class="LineNr">418 </span>    <span class="subxS2Comment"># . . push args</span>
+<span id="L419" class="LineNr">419 </span>    68/push  <span class="SpecialChar">Newline</span>/imm32
+<span id="L420" class="LineNr">420 </span>    68/push  _test-stream/imm32
+<span id="L421" class="LineNr">421 </span>    <span class="subxS2Comment"># . . call</span>
+<span id="L422" class="LineNr">422 </span>    e8/call  write/disp32
+<span id="L423" class="LineNr">423 </span>    <span class="subxS2Comment"># . . discard args</span>
+<span id="L424" class="LineNr">424 </span>    81          0/subop/add         3/mod/direct    4/rm32/ESP   <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>           <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>              8/imm32           <span class="subxComment"># add to ESP</span>
+<span id="L425" class="LineNr">425 </span>    <span class="subxS1Comment"># . write(_test-stream, real text)</span>
+<span id="L426" class="LineNr">426 </span>    <span class="subxS2Comment"># . . push args</span>
+<span id="L427" class="LineNr">427 </span>    68/push  <span class="Constant">&quot; ab&quot;</span>/imm32
+<span id="L428" class="LineNr">428 </span>    68/push  _test-stream/imm32
+<span id="L429" class="LineNr">429 </span>    <span class="subxS2Comment"># . . call</span>
+<span id="L430" class="LineNr">430 </span>    e8/call  write/disp32
+<span id="L431" class="LineNr">431 </span>    <span class="subxS2Comment"># . . discard args</span>
+<span id="L432" class="LineNr">432 </span>    81          0/subop/add         3/mod/direct    4/rm32/ESP   <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>           <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>              8/imm32           <span class="subxComment"># add to ESP</span>
+<span id="L433" class="LineNr">433 </span>    <span class="subxComment"># scan-next-byte(_test-buffered-file)</span>
+<span id="L434" class="LineNr">434 </span>    <span class="subxS2Comment"># . . push args</span>
+<span id="L435" class="LineNr">435 </span>    68/push  _test-buffered-file/imm32
+<span id="L436" class="LineNr">436 </span>    <span class="subxS2Comment"># . . call</span>
+<span id="L437" class="LineNr">437 </span>    e8/call  scan-next-byte/disp32
+<span id="L438" class="LineNr">438 </span>    <span class="subxS2Comment"># . . discard args</span>
+<span id="L439" class="LineNr">439 </span>    81          0/subop/add         3/mod/direct    4/rm32/ESP   <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>           <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>              4/imm32           <span class="subxComment"># add to ESP</span>
+<span id="L440" class="LineNr">440 </span>    <span class="subxComment"># check-ints-equal(EAX, 0x61/a, msg)</span>
+<span id="L441" class="LineNr">441 </span>    <span class="subxS2Comment"># . . push args</span>
+<span id="L442" class="LineNr">442 </span>    68/push  <span class="Constant">&quot;F - test-scan-next-byte-skips-comment&quot;</span>/imm32
+<span id="L443" class="LineNr">443 </span>    68/push  0x61/imm32/a
+<span id="L444" class="LineNr">444 </span>    50/push-EAX
+<span id="L445" class="LineNr">445 </span>    <span class="subxS2Comment"># . . call</span>
+<span id="L446" class="LineNr">446 </span>    e8/call  check-ints-equal/disp32
+<span id="L447" class="LineNr">447 </span>    <span class="subxS2Comment"># . . discard args</span>
+<span id="L448" class="LineNr">448 </span>    81          0/subop/add         3/mod/direct    4/rm32/ESP   <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>           <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>              0xc/imm32         <span class="subxComment"># add to ESP</span>
+<span id="L449" class="LineNr">449 </span>    <span class="subxS1Comment"># . end</span>
+<span id="L450" class="LineNr">450 </span>    c3/return
+<span id="L451" class="LineNr">451 </span>
+<span id="L452" class="LineNr">452 </span><span class="subxTest">test-scan-next-byte-skips-whitespace-and-comment</span>:
+<span id="L453" class="LineNr">453 </span>    <span class="subxH1Comment"># - check that the first two bytes of the input are assembled into the resulting number</span>
+<span id="L454" class="LineNr">454 </span>    <span class="subxComment"># setup</span>
+<span id="L455" class="LineNr">455 </span>    <span class="subxS1Comment"># . clear-stream(_test-stream)</span>
+<span id="L456" class="LineNr">456 </span>    <span class="subxS2Comment"># . . push args</span>
+<span id="L457" class="LineNr">457 </span>    68/push  _test-stream/imm32
+<span id="L458" class="LineNr">458 </span>    <span class="subxS2Comment"># . . call</span>
+<span id="L459" class="LineNr">459 </span>    e8/call  clear-stream/disp32
+<span id="L460" class="LineNr">460 </span>    <span class="subxS2Comment"># . . discard args</span>
+<span id="L461" class="LineNr">461 </span>    81          0/subop/add         3/mod/direct    4/rm32/ESP   <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>           <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>              4/imm32           <span class="subxComment"># add to ESP</span>
+<span id="L462" class="LineNr">462 </span>    <span class="subxS1Comment"># . clear-stream(_test-buffered-file+4)</span>
+<span id="L463" class="LineNr">463 </span>    <span class="subxS2Comment"># . . push args</span>
+<span id="L464" class="LineNr">464 </span>    b8/copy-to-EAX  _test-buffered-file/imm32
+<span id="L465" class="LineNr">465 </span>    05/add-to-EAX  4/imm32
+<span id="L466" class="LineNr">466 </span>    50/push-EAX
+<span id="L467" class="LineNr">467 </span>    <span class="subxS2Comment"># . . call</span>
+<span id="L468" class="LineNr">468 </span>    e8/call  clear-stream/disp32
+<span id="L469" class="LineNr">469 </span>    <span class="subxS2Comment"># . . discard args</span>
+<span id="L470" class="LineNr">470 </span>    81          0/subop/add         3/mod/direct    4/rm32/ESP   <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>           <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>              4/imm32           <span class="subxComment"># add to ESP</span>
+<span id="L471" class="LineNr">471 </span>    <span class="subxComment"># initialize '_test-stream' to input with leading whitespace and comment</span>
+<span id="L472" class="LineNr">472 </span>    <span class="subxS1Comment"># . write(_test-stream, comment)</span>
+<span id="L473" class="LineNr">473 </span>    <span class="subxS2Comment"># . . push args</span>
+<span id="L474" class="LineNr">474 </span>    68/push  <span class="Constant">&quot; #x&quot;</span>/imm32
+<span id="L475" class="LineNr">475 </span>    68/push  _test-stream/imm32
+<span id="L476" class="LineNr">476 </span>    <span class="subxS2Comment"># . . call</span>
+<span id="L477" class="LineNr">477 </span>    e8/call  write/disp32
+<span id="L478" class="LineNr">478 </span>    <span class="subxS2Comment"># . . discard args</span>
+<span id="L479" class="LineNr">479 </span>    81          0/subop/add         3/mod/direct    4/rm32/ESP   <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>           <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>              8/imm32           <span class="subxComment"># add to ESP</span>
+<span id="L480" class="LineNr">480 </span>    <span class="subxS1Comment"># . write(_test-stream, Newline)</span>
+<span id="L481" class="LineNr">481 </span>    <span class="subxS2Comment"># . . push args</span>
+<span id="L482" class="LineNr">482 </span>    68/push  <span class="SpecialChar">Newline</span>/imm32
+<span id="L483" class="LineNr">483 </span>    68/push  _test-stream/imm32
+<span id="L484" class="LineNr">484 </span>    <span class="subxS2Comment"># . . call</span>
+<span id="L485" class="LineNr">485 </span>    e8/call  write/disp32
+<span id="L486" class="LineNr">486 </span>    <span class="subxS2Comment"># . . discard args</span>
+<span id="L487" class="LineNr">487 </span>    81          0/subop/add         3/mod/direct    4/rm32/ESP   <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>           <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>              8/imm32           <span class="subxComment"># add to ESP</span>
+<span id="L488" class="LineNr">488 </span>    <span class="subxS1Comment"># . write(_test-stream, real text)</span>
+<span id="L489" class="LineNr">489 </span>    <span class="subxS2Comment"># . . push args</span>
+<span id="L490" class="LineNr">490 </span>    68/push  <span class="Constant">&quot;ab&quot;</span>/imm32
+<span id="L491" class="LineNr">491 </span>    68/push  _test-stream/imm32
+<span id="L492" class="LineNr">492 </span>    <span class="subxS2Comment"># . . call</span>
+<span id="L493" class="LineNr">493 </span>    e8/call  write/disp32
+<span id="L494" class="LineNr">494 </span>    <span class="subxS2Comment"># . . discard args</span>
+<span id="L495" class="LineNr">495 </span>    81          0/subop/add         3/mod/direct    4/rm32/ESP   <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>           <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>              8/imm32           <span class="subxComment"># add to ESP</span>
+<span id="L496" class="LineNr">496 </span>    <span class="subxComment"># scan-next-byte(_test-buffered-file)</span>
+<span id="L497" class="LineNr">497 </span>    <span class="subxS2Comment"># . . push args</span>
+<span id="L498" class="LineNr">498 </span>    68/push  _test-buffered-file/imm32
+<span id="L499" class="LineNr">499 </span>    <span class="subxS2Comment"># . . call</span>
+<span id="L500" class="LineNr">500 </span>    e8/call  scan-next-byte/disp32
+<span id="L501" class="LineNr">501 </span>    <span class="subxS2Comment"># . . discard args</span>
+<span id="L502" class="LineNr">502 </span>    81          0/subop/add         3/mod/direct    4/rm32/ESP   <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>           <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>              4/imm32           <span class="subxComment"># add to ESP</span>
+<span id="L503" class="LineNr">503 </span>    <span class="subxComment"># check-ints-equal(EAX, 0x61/a, msg)</span>
+<span id="L504" class="LineNr">504 </span>    <span class="subxS2Comment"># . . push args</span>
+<span id="L505" class="LineNr">505 </span>    68/push  <span class="Constant">&quot;F - test-scan-next-byte-skips-comment&quot;</span>/imm32
+<span id="L506" class="LineNr">506 </span>    68/push  0x61/imm32/a
+<span id="L507" class="LineNr">507 </span>    50/push-EAX
+<span id="L508" class="LineNr">508 </span>    <span class="subxS2Comment"># . . call</span>
+<span id="L509" class="LineNr">509 </span>    e8/call  check-ints-equal/disp32
+<span id="L510" class="LineNr">510 </span>    <span class="subxS2Comment"># . . discard args</span>
+<span id="L511" class="LineNr">511 </span>    81          0/subop/add         3/mod/direct    4/rm32/ESP   <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>           <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>              0xc/imm32         <span class="subxComment"># add to ESP</span>
+<span id="L512" class="LineNr">512 </span>    <span class="subxS1Comment"># . end</span>
+<span id="L513" class="LineNr">513 </span>    c3/return
+<span id="L514" class="LineNr">514 </span>
+<span id="L515" class="LineNr">515 </span><span class="subxTest">test-scan-next-byte-reads-final-byte</span>:
+<span id="L516" class="LineNr">516 </span>    <span class="subxH1Comment"># - check that the first two bytes of the input are assembled into the resulting number</span>
+<span id="L517" class="LineNr">517 </span>    <span class="subxComment"># setup</span>
+<span id="L518" class="LineNr">518 </span>    <span class="subxS1Comment"># . clear-stream(_test-stream)</span>
+<span id="L519" class="LineNr">519 </span>    <span class="subxS2Comment"># . . push args</span>
+<span id="L520" class="LineNr">520 </span>    68/push  _test-stream/imm32
+<span id="L521" class="LineNr">521 </span>    <span class="subxS2Comment"># . . call</span>
+<span id="L522" class="LineNr">522 </span>    e8/call  clear-stream/disp32
+<span id="L523" class="LineNr">523 </span>    <span class="subxS2Comment"># . . discard args</span>
+<span id="L524" class="LineNr">524 </span>    81          0/subop/add         3/mod/direct    4/rm32/ESP   <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>           <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>              4/imm32           <span class="subxComment"># add to ESP</span>
+<span id="L525" class="LineNr">525 </span>    <span class="subxS1Comment"># . clear-stream(_test-buffered-file+4)</span>
+<span id="L526" class="LineNr">526 </span>    <span class="subxS2Comment"># . . push args</span>
+<span id="L527" class="LineNr">527 </span>    b8/copy-to-EAX  _test-buffered-file/imm32
+<span id="L528" class="LineNr">528 </span>    05/add-to-EAX  4/imm32
+<span id="L529" class="LineNr">529 </span>    50/push-EAX
+<span id="L530" class="LineNr">530 </span>    <span class="subxS2Comment"># . . call</span>
+<span id="L531" class="LineNr">531 </span>    e8/call  clear-stream/disp32
+<span id="L532" class="LineNr">532 </span>    <span class="subxS2Comment"># . . discard args</span>
+<span id="L533" class="LineNr">533 </span>    81          0/subop/add         3/mod/direct    4/rm32/ESP   <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>           <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>              4/imm32           <span class="subxComment"># add to ESP</span>
+<span id="L534" class="LineNr">534 </span>    <span class="subxComment"># initialize '_test-stream' to input with single character</span>
+<span id="L535" class="LineNr">535 </span>    <span class="subxS1Comment"># . write(_test-stream, character)</span>
+<span id="L536" class="LineNr">536 </span>    <span class="subxS2Comment"># . . push args</span>
+<span id="L537" class="LineNr">537 </span>    68/push  <span class="Constant">&quot;a&quot;</span>/imm32
+<span id="L538" class="LineNr">538 </span>    68/push  _test-stream/imm32
+<span id="L539" class="LineNr">539 </span>    <span class="subxS2Comment"># . . call</span>
+<span id="L540" class="LineNr">540 </span>    e8/call  write/disp32
+<span id="L541" class="LineNr">541 </span>    <span class="subxS2Comment"># . . discard args</span>
+<span id="L542" class="LineNr">542 </span>    81          0/subop/add         3/mod/direct    4/rm32/ESP   <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>           <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>              8/imm32           <span class="subxComment"># add to ESP</span>
+<span id="L543" class="LineNr">543 </span>    <span class="subxComment"># scan-next-byte(_test-buffered-file)</span>
+<span id="L544" class="LineNr">544 </span>    <span class="subxS2Comment"># . . push args</span>
+<span id="L545" class="LineNr">545 </span>    68/push  _test-buffered-file/imm32
+<span id="L546" class="LineNr">546 </span>    <span class="subxS2Comment"># . . call</span>
+<span id="L547" class="LineNr">547 </span>    e8/call  scan-next-byte/disp32
+<span id="L548" class="LineNr">548 </span>    <span class="subxS2Comment"># . . discard args</span>
+<span id="L549" class="LineNr">549 </span>    81          0/subop/add         3/mod/direct    4/rm32/ESP   <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>           <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>              4/imm32           <span class="subxComment"># add to ESP</span>
+<span id="L550" class="LineNr">550 </span>    <span class="subxComment"># check-ints-equal(EAX, 0x61/a, msg)</span>
+<span id="L551" class="LineNr">551 </span>    <span class="subxS2Comment"># . . push args</span>
+<span id="L552" class="LineNr">552 </span>    68/push  <span class="Constant">&quot;F - test-scan-next-byte-skips-comment&quot;</span>/imm32
+<span id="L553" class="LineNr">553 </span>    68/push  0x61/imm32/a
+<span id="L554" class="LineNr">554 </span>    50/push-EAX
+<span id="L555" class="LineNr">555 </span>    <span class="subxS2Comment"># . . call</span>
+<span id="L556" class="LineNr">556 </span>    e8/call  check-ints-equal/disp32
+<span id="L557" class="LineNr">557 </span>    <span class="subxS2Comment"># . . discard args</span>
+<span id="L558" class="LineNr">558 </span>    81          0/subop/add         3/mod/direct    4/rm32/ESP   <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>           <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>              0xc/imm32         <span class="subxComment"># add to ESP</span>
+<span id="L559" class="LineNr">559 </span>    <span class="subxS1Comment"># . end</span>
+<span id="L560" class="LineNr">560 </span>    c3/return
+<span id="L561" class="LineNr">561 </span>
+<span id="L562" class="LineNr">562 </span><span class="subxFunction">is-hex-lowercase-byte?</span>:  <span class="subxComment"># c : byte -&gt; bool/EAX</span>
+<span id="L563" class="LineNr">563 </span>    <span class="subxS1Comment"># . prolog</span>
+<span id="L564" class="LineNr">564 </span>    55/push-EBP
+<span id="L565" class="LineNr">565 </span>    89/copy                         3/mod/direct    5/rm32/EBP   <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>           <span class="CommentedCode"> . </span>          4/r32/ESP  <span class="CommentedCode"> . </span>             <span class="CommentedCode"> . </span>                <span class="subxComment"># copy ESP to EBP</span>
+<span id="L566" class="LineNr">566 </span>    <span class="subxS1Comment"># . save registers</span>
+<span id="L567" class="LineNr">567 </span>    51/push-ECX
+<span id="L568" class="LineNr">568 </span>    <span class="subxComment"># ECX = c</span>
+<span id="L569" class="LineNr">569 </span>    8b/copy                         1/mod/*+disp8   4/rm32/sib    5/base/EBP  4/index/none <span class="CommentedCode"> . </span>          1/r32/ECX   0x8/disp8      <span class="CommentedCode"> . </span>                <span class="subxComment"># copy *(EBP+8) to ECX</span>
+<span id="L570" class="LineNr">570 </span>    <span class="subxComment"># return false if c &lt; '0'</span>
+<span id="L571" class="LineNr">571 </span>    b8/copy-to-EAX  0/imm32/false
+<span id="L572" class="LineNr">572 </span>    81          7/subop/compare     3/mod/direct    1/rm32/ECX   <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>           <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>              0x30/imm32        <span class="subxComment"># compare ECX</span>
+<span id="L573" class="LineNr">573 </span>    7c/jump-if-lesser  $is-hex-lowercase-byte?:end/disp8
+<span id="L574" class="LineNr">574 </span>    <span class="subxComment"># return false if c &gt; 'f'</span>
+<span id="L575" class="LineNr">575 </span>    81          7/subop/compare     3/mod/direct    1/rm32/ECX   <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>           <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>              0x66/imm32        <span class="subxComment"># compare ECX</span>
+<span id="L576" class="LineNr">576 </span>    7f/jump-if-greater  $is-hex-lowercase-byte?:end/disp8
+<span id="L577" class="LineNr">577 </span>    <span class="subxComment"># return true if c &lt;= '9'</span>
+<span id="L578" class="LineNr">578 </span>    b8/copy-to-EAX  1/imm32/true
+<span id="L579" class="LineNr">579 </span>    81          7/subop/compare     3/mod/direct    1/rm32/ECX   <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>           <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>              0x39/imm32        <span class="subxComment"># compare ECX</span>
+<span id="L580" class="LineNr">580 </span>    7e/jump-if-lesser-or-equal  $is-hex-lowercase-byte?:end/disp8
+<span id="L581" class="LineNr">581 </span>    <span class="subxComment"># return true if c &gt;= 'a'</span>
+<span id="L582" class="LineNr">582 </span>    81          7/subop/compare     3/mod/direct    1/rm32/ECX   <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>           <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>              0x61/imm32        <span class="subxComment"># compare ECX</span>
+<span id="L583" class="LineNr">583 </span>    7d/jump-if-greater-or-equal  $is-hex-lowercase-byte?:end/disp8
+<span id="L584" class="LineNr">584 </span>    <span class="subxComment"># otherwise return false</span>
+<span id="L585" class="LineNr">585 </span>    b8/copy-to-EAX  0/imm32/false
+<span id="L586" class="LineNr">586 </span><span class="Constant">$is-hex-lowercase-byte?:end</span>:
+<span id="L587" class="LineNr">587 </span>    <span class="subxS1Comment"># . restore registers</span>
+<span id="L588" class="LineNr">588 </span>    59/pop-to-ECX
+<span id="L589" class="LineNr">589 </span>    <span class="subxS1Comment"># . epilog</span>
+<span id="L590" class="LineNr">590 </span>    89/copy                         3/mod/direct    4/rm32/ESP   <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>           <span class="CommentedCode"> . </span>          5/r32/EBP  <span class="CommentedCode"> . </span>             <span class="CommentedCode"> . </span>                <span class="subxComment"># copy EBP to ESP</span>
+<span id="L591" class="LineNr">591 </span>    5d/pop-to-EBP
+<span id="L592" class="LineNr">592 </span>    c3/return
+<span id="L593" class="LineNr">593 </span>
+<span id="L594" class="LineNr">594 </span><span class="subxTest">test-hex-below-0</span>:
+<span id="L595" class="LineNr">595 </span>    <span class="subxComment"># is-hex-lowercase-byte?(0x2f)</span>
+<span id="L596" class="LineNr">596 </span>    <span class="subxS2Comment"># . . push args</span>
+<span id="L597" class="LineNr">597 </span>    68/push  0x2f/imm32
+<span id="L598" class="LineNr">598 </span>    <span class="subxS2Comment"># . . call</span>
+<span id="L599" class="LineNr">599 </span>    e8/call  is-hex-lowercase-byte?/disp32
+<span id="L600" class="LineNr">600 </span>    <span class="subxS2Comment"># . . discard args</span>
+<span id="L601" class="LineNr">601 </span>    81          0/subop/add         3/mod/direct    4/rm32/ESP   <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>           <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>              4/imm32           <span class="subxComment"># add to ESP</span>
+<span id="L602" class="LineNr">602 </span>    <span class="subxComment"># check-ints-equal(EAX, 0, msg)</span>
+<span id="L603" class="LineNr">603 </span>    <span class="subxS2Comment"># . . push args</span>
+<span id="L604" class="LineNr">604 </span>    68/push  <span class="Constant">&quot;F - test-hex-below-0&quot;</span>/imm32
+<span id="L605" class="LineNr">605 </span>    68/push  0/imm32/false
+<span id="L606" class="LineNr">606 </span>    50/push-EAX
+<span id="L607" class="LineNr">607 </span>    <span class="subxS2Comment"># . . call</span>
+<span id="L608" class="LineNr">608 </span>    e8/call  check-ints-equal/disp32
+<span id="L609" class="LineNr">609 </span>    <span class="subxS2Comment"># . . discard args</span>
+<span id="L610" class="LineNr">610 </span>    81          0/subop/add         3/mod/direct    4/rm32/ESP   <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>           <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>              0xc/imm32         <span class="subxComment"># add to ESP</span>
+<span id="L611" class="LineNr">611 </span>    c3/return
+<span id="L612" class="LineNr">612 </span>
+<span id="L613" class="LineNr">613 </span><span class="subxTest">test-hex-0-to-9</span>:
+<span id="L614" class="LineNr">614 </span>    <span class="subxComment"># is-hex-lowercase-byte?(0x30)</span>
+<span id="L615" class="LineNr">615 </span>    <span class="subxS2Comment"># . . push args</span>
+<span id="L616" class="LineNr">616 </span>    68/push  0x30/imm32
+<span id="L617" class="LineNr">617 </span>    <span class="subxS2Comment"># . . call</span>
+<span id="L618" class="LineNr">618 </span>    e8/call  is-hex-lowercase-byte?/disp32
+<span id="L619" class="LineNr">619 </span>    <span class="subxS2Comment"># . . discard args</span>
+<span id="L620" class="LineNr">620 </span>    81          0/subop/add         3/mod/direct    4/rm32/ESP   <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>           <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>              4/imm32           <span class="subxComment"># add to ESP</span>
+<span id="L621" class="LineNr">621 </span>    <span class="subxComment"># check-ints-equal(EAX, 1, msg)</span>
+<span id="L622" class="LineNr">622 </span>    <span class="subxS2Comment"># . . push args</span>
+<span id="L623" class="LineNr">623 </span>    68/push  <span class="Constant">&quot;F - test-hex-at-0&quot;</span>/imm32
+<span id="L624" class="LineNr">624 </span>    68/push  1/imm32/true
+<span id="L625" class="LineNr">625 </span>    50/push-EAX
+<span id="L626" class="LineNr">626 </span>    <span class="subxS2Comment"># . . call</span>
+<span id="L627" class="LineNr">627 </span>    e8/call  check-ints-equal/disp32
+<span id="L628" class="LineNr">628 </span>    <span class="subxS2Comment"># . . discard args</span>
+<span id="L629" class="LineNr">629 </span>    81          0/subop/add         3/mod/direct    4/rm32/ESP   <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>           <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>              0xc/imm32         <span class="subxComment"># add to ESP</span>
+<span id="L630" class="LineNr">630 </span>    <span class="subxComment"># is-hex-lowercase-byte?(0x39)</span>
+<span id="L631" class="LineNr">631 </span>    <span class="subxS2Comment"># . . push args</span>
+<span id="L632" class="LineNr">632 </span>    68/push  0x39/imm32
+<span id="L633" class="LineNr">633 </span>    <span class="subxS2Comment"># . . call</span>
+<span id="L634" class="LineNr">634 </span>    e8/call  is-hex-lowercase-byte?/disp32
+<span id="L635" class="LineNr">635 </span>    <span class="subxS2Comment"># . . discard args</span>
+<span id="L636" class="LineNr">636 </span>    81          0/subop/add         3/mod/direct    4/rm32/ESP   <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>           <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>              4/imm32           <span class="subxComment"># add to ESP</span>
+<span id="L637" class="LineNr">637 </span>    <span class="subxComment"># check-ints-equal(EAX, 1, msg)</span>
+<span id="L638" class="LineNr">638 </span>    <span class="subxS2Comment"># . . push args</span>
+<span id="L639" class="LineNr">639 </span>    68/push  <span class="Constant">&quot;F - test-hex-at-9&quot;</span>/imm32
+<span id="L640" class="LineNr">640 </span>    68/push  1/imm32/true
+<span id="L641" class="LineNr">641 </span>    50/push-EAX
+<span id="L642" class="LineNr">642 </span>    <span class="subxS2Comment"># . . call</span>
+<span id="L643" class="LineNr">643 </span>    e8/call  check-ints-equal/disp32
+<span id="L644" class="LineNr">644 </span>    <span class="subxS2Comment"># . . discard args</span>
+<span id="L645" class="LineNr">645 </span>    81          0/subop/add         3/mod/direct    4/rm32/ESP   <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>           <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>              0xc/imm32         <span class="subxComment"># add to ESP</span>
+<span id="L646" class="LineNr">646 </span>    c3/return
+<span id="L647" class="LineNr">647 </span>
+<span id="L648" class="LineNr">648 </span><span class="subxTest">test-hex-above-9-to-a</span>:
+<span id="L649" class="LineNr">649 </span>    <span class="subxComment"># is-hex-lowercase-byte?(0x3a)</span>
+<span id="L650" class="LineNr">650 </span>    <span class="subxS2Comment"># . . push args</span>
+<span id="L651" class="LineNr">651 </span>    68/push  0x3a/imm32
+<span id="L652" class="LineNr">652 </span>    <span class="subxS2Comment"># . . call</span>
+<span id="L653" class="LineNr">653 </span>    e8/call  is-hex-lowercase-byte?/disp32
+<span id="L654" class="LineNr">654 </span>    <span class="subxS2Comment"># . . discard args</span>
+<span id="L655" class="LineNr">655 </span>    81          0/subop/add         3/mod/direct    4/rm32/ESP   <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>           <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>              4/imm32           <span class="subxComment"># add to ESP</span>
+<span id="L656" class="LineNr">656 </span>    <span class="subxComment"># check-ints-equal(EAX, 0, msg)</span>
+<span id="L657" class="LineNr">657 </span>    <span class="subxS2Comment"># . . push args</span>
+<span id="L658" class="LineNr">658 </span>    68/push  <span class="Constant">&quot;F - test-hex-above-9-to-a&quot;</span>/imm32
+<span id="L659" class="LineNr">659 </span>    68/push  0/imm32/false
+<span id="L660" class="LineNr">660 </span>    50/push-EAX
+<span id="L661" class="LineNr">661 </span>    <span class="subxS2Comment"># . . call</span>
+<span id="L662" class="LineNr">662 </span>    e8/call  check-ints-equal/disp32
+<span id="L663" class="LineNr">663 </span>    <span class="subxS2Comment"># . . discard args</span>
+<span id="L664" class="LineNr">664 </span>    81          0/subop/add         3/mod/direct    4/rm32/ESP   <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>           <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>              0xc/imm32         <span class="subxComment"># add to ESP</span>
+<span id="L665" class="LineNr">665 </span>    c3/return
+<span id="L666" class="LineNr">666 </span>
+<span id="L667" class="LineNr">667 </span><span class="subxTest">test-hex-a-to-f</span>:
+<span id="L668" class="LineNr">668 </span>    <span class="subxComment"># is-hex-lowercase-byte?(0x61)</span>
+<span id="L669" class="LineNr">669 </span>    <span class="subxS2Comment"># . . push args</span>
+<span id="L670" class="LineNr">670 </span>    68/push  0x61/imm32
+<span id="L671" class="LineNr">671 </span>    <span class="subxS2Comment"># . . call</span>
+<span id="L672" class="LineNr">672 </span>    e8/call  is-hex-lowercase-byte?/disp32
+<span id="L673" class="LineNr">673 </span>    <span class="subxS2Comment"># . . discard args</span>
+<span id="L674" class="LineNr">674 </span>    81          0/subop/add         3/mod/direct    4/rm32/ESP   <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>           <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>              4/imm32           <span class="subxComment"># add to ESP</span>
+<span id="L675" class="LineNr">675 </span>    <span class="subxComment"># check-ints-equal(EAX, 1, msg)</span>
+<span id="L676" class="LineNr">676 </span>    <span class="subxS2Comment"># . . push args</span>
+<span id="L677" class="LineNr">677 </span>    68/push  <span class="Constant">&quot;F - test-hex-at-a&quot;</span>/imm32
+<span id="L678" class="LineNr">678 </span>    68/push  1/imm32/true
+<span id="L679" class="LineNr">679 </span>    50/push-EAX
+<span id="L680" class="LineNr">680 </span>    <span class="subxS2Comment"># . . call</span>
+<span id="L681" class="LineNr">681 </span>    e8/call  check-ints-equal/disp32
+<span id="L682" class="LineNr">682 </span>    <span class="subxS2Comment"># . . discard args</span>
+<span id="L683" class="LineNr">683 </span>    81          0/subop/add         3/mod/direct    4/rm32/ESP   <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>           <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>              0xc/imm32         <span class="subxComment"># add to ESP</span>
+<span id="L684" class="LineNr">684 </span>    <span class="subxComment"># is-hex-lowercase-byte?(0x66)</span>
+<span id="L685" class="LineNr">685 </span>    <span class="subxS2Comment"># . . push args</span>
+<span id="L686" class="LineNr">686 </span>    68/push  0x66/imm32
+<span id="L687" class="LineNr">687 </span>    <span class="subxS2Comment"># . . call</span>
+<span id="L688" class="LineNr">688 </span>    e8/call  is-hex-lowercase-byte?/disp32
+<span id="L689" class="LineNr">689 </span>    <span class="subxS2Comment"># . . discard args</span>
+<span id="L690" class="LineNr">690 </span>    81          0/subop/add         3/mod/direct    4/rm32/ESP   <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>           <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>              4/imm32           <span class="subxComment"># add to ESP</span>
+<span id="L691" class="LineNr">691 </span>    <span class="subxComment"># check-ints-equal(EAX, 1, msg)</span>
+<span id="L692" class="LineNr">692 </span>    <span class="subxS2Comment"># . . push args</span>
+<span id="L693" class="LineNr">693 </span>    68/push  <span class="Constant">&quot;F - test-hex-at-f&quot;</span>/imm32
+<span id="L694" class="LineNr">694 </span>    68/push  1/imm32/true
+<span id="L695" class="LineNr">695 </span>    50/push-EAX
+<span id="L696" class="LineNr">696 </span>    <span class="subxS2Comment"># . . call</span>
+<span id="L697" class="LineNr">697 </span>    e8/call  check-ints-equal/disp32
+<span id="L698" class="LineNr">698 </span>    <span class="subxS2Comment"># . . discard args</span>
+<span id="L699" class="LineNr">699 </span>    81          0/subop/add         3/mod/direct    4/rm32/ESP   <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>           <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>              0xc/imm32         <span class="subxComment"># add to ESP</span>
+<span id="L700" class="LineNr">700 </span>    c3/return
+<span id="L701" class="LineNr">701 </span>
+<span id="L702" class="LineNr">702 </span><span class="subxTest">test-hex-above-f</span>:
+<span id="L703" class="LineNr">703 </span>    <span class="subxComment"># is-hex-lowercase-byte?(0x67)</span>
+<span id="L704" class="LineNr">704 </span>    <span class="subxS2Comment"># . . push args</span>
+<span id="L705" class="LineNr">705 </span>    68/push  0x67/imm32
+<span id="L706" class="LineNr">706 </span>    <span class="subxS2Comment"># . . call</span>
+<span id="L707" class="LineNr">707 </span>    e8/call  is-hex-lowercase-byte?/disp32
+<span id="L708" class="LineNr">708 </span>    <span class="subxS2Comment"># . . discard args</span>
+<span id="L709" class="LineNr">709 </span>    81          0/subop/add         3/mod/direct    4/rm32/ESP   <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>           <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>              4/imm32           <span class="subxComment"># add to ESP</span>
+<span id="L710" class="LineNr">710 </span>    <span class="subxComment"># check-ints-equal(EAX, 0, msg)</span>
+<span id="L711" class="LineNr">711 </span>    <span class="subxS2Comment"># . . push args</span>
+<span id="L712" class="LineNr">712 </span>    68/push  <span class="Constant">&quot;F - test-hex-above-f&quot;</span>/imm32
+<span id="L713" class="LineNr">713 </span>    68/push  0/imm32/false
+<span id="L714" class="LineNr">714 </span>    50/push-EAX
+<span id="L715" class="LineNr">715 </span>    <span class="subxS2Comment"># . . call</span>
+<span id="L716" class="LineNr">716 </span>    e8/call  check-ints-equal/disp32
+<span id="L717" class="LineNr">717 </span>    <span class="subxS2Comment"># . . discard args</span>
+<span id="L718" class="LineNr">718 </span>    81          0/subop/add         3/mod/direct    4/rm32/ESP   <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>           <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>              0xc/imm32         <span class="subxComment"># add to ESP</span>
+<span id="L719" class="LineNr">719 </span>    c3/return
+<span id="L720" class="LineNr">720 </span>
+<span id="L721" class="LineNr">721 </span><span class="subxFunction">skip-until-newline</span>:  <span class="subxComment"># in : (address buffered-file) -&gt; &lt;void&gt;</span>
+<span id="L722" class="LineNr">722 </span>    <span class="subxComment"># pseudocode:</span>
+<span id="L723" class="LineNr">723 </span>    <span class="subxComment">#   push EAX</span>
+<span id="L724" class="LineNr">724 </span>    <span class="subxComment">#   repeatedly:</span>
+<span id="L725" class="LineNr">725 </span>    <span class="subxComment">#     EAX = read-byte(in)</span>
+<span id="L726" class="LineNr">726 </span>    <span class="subxComment">#     if EAX == 0xffffffff break</span>
+<span id="L727" class="LineNr">727 </span>    <span class="subxComment">#     if EAX == 0x0a break</span>
+<span id="L728" class="LineNr">728 </span>    <span class="subxComment">#   pop EAX</span>
+<span id="L729" class="LineNr">729 </span>    <span class="subxS1Comment"># . prolog</span>
+<span id="L730" class="LineNr">730 </span>    55/push-EBP
+<span id="L731" class="LineNr">731 </span>    89/copy                         3/mod/direct    5/rm32/EBP   <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>           <span class="CommentedCode"> . </span>          4/r32/ESP  <span class="CommentedCode"> . </span>             <span class="CommentedCode"> . </span>                <span class="subxComment"># copy ESP to EBP</span>
+<span id="L732" class="LineNr">732 </span>    <span class="subxS1Comment"># . save registers</span>
+<span id="L733" class="LineNr">733 </span>    50/push-EAX
+<span id="L734" class="LineNr">734 </span><span class="Constant">$skip-until-newline:loop</span>:
+<span id="L735" class="LineNr">735 </span>    <span class="subxS1Comment"># . EAX = read-byte(in)</span>
+<span id="L736" class="LineNr">736 </span>    <span class="subxS2Comment"># . . push args</span>
+<span id="L737" class="LineNr">737 </span>    ff          6/subop/push        1/mod/*+disp8   4/rm32/sib    5/base/EBP  4/index/none <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>          0x8/disp8      <span class="CommentedCode"> . </span>                <span class="subxComment"># push *(EBP+8)</span>
+<span id="L738" class="LineNr">738 </span>    <span class="subxS2Comment"># . . call</span>
+<span id="L739" class="LineNr">739 </span>    e8/call  read-byte/disp32
+<span id="L740" class="LineNr">740 </span>    <span class="subxS2Comment"># . . discard args</span>
+<span id="L741" class="LineNr">741 </span>    81          0/subop/add         3/mod/direct    4/rm32/ESP   <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>           <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>              4/imm32           <span class="subxComment"># add to ESP</span>
+<span id="L742" class="LineNr">742 </span>    <span class="subxS1Comment"># . if EAX == 0xffffffff break</span>
+<span id="L743" class="LineNr">743 </span>    81          7/subop/compare     3/mod/direct    0/rm32/EAX   <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>           <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>              0xffffffff/imm32  <span class="subxComment"># compare EAX</span>
+<span id="L744" class="LineNr">744 </span>    74/jump-if-equal  $skip-until-newline:end/disp8
+<span id="L745" class="LineNr">745 </span><span class="Constant">$aa</span>:
+<span id="L746" class="LineNr">746 </span>    <span class="subxS1Comment"># . if EAX != 0xa/newline loop</span>
+<span id="L747" class="LineNr">747 </span>    81          7/subop/compare     3/mod/direct    0/rm32/EAX   <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>           <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>              0xa/imm32         <span class="subxComment"># compare EAX</span>
+<span id="L748" class="LineNr">748 </span>    75/jump-if-not-equal  $skip-until-newline:loop/disp8
+<span id="L749" class="LineNr">749 </span><span class="Constant">$skip-until-newline:end</span>:
+<span id="L750" class="LineNr">750 </span>    <span class="subxS1Comment"># . restore registers</span>
+<span id="L751" class="LineNr">751 </span>    58/pop-to-EAX
+<span id="L752" class="LineNr">752 </span>    <span class="subxS1Comment"># . epilog</span>
+<span id="L753" class="LineNr">753 </span>    89/copy                         3/mod/direct    4/rm32/ESP   <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>           <span class="CommentedCode"> . </span>          5/r32/EBP  <span class="CommentedCode"> . </span>             <span class="CommentedCode"> . </span>                <span class="subxComment"># copy EBP to ESP</span>
+<span id="L754" class="LineNr">754 </span>    5d/pop-to-EBP
+<span id="L755" class="LineNr">755 </span>    c3/return
+<span id="L756" class="LineNr">756 </span>
+<span id="L757" class="LineNr">757 </span><span class="subxTest">test-skip-until-newline</span>:
+<span id="L758" class="LineNr">758 </span>    <span class="subxH1Comment"># - check that the read pointer points after the newline</span>
+<span id="L759" class="LineNr">759 </span>    <span class="subxComment"># setup</span>
+<span id="L760" class="LineNr">760 </span>    <span class="subxS1Comment"># . clear-stream(_test-stream)</span>
+<span id="L761" class="LineNr">761 </span>    <span class="subxS2Comment"># . . push args</span>
+<span id="L762" class="LineNr">762 </span>    68/push  _test-stream/imm32
+<span id="L763" class="LineNr">763 </span>    <span class="subxS2Comment"># . . call</span>
+<span id="L764" class="LineNr">764 </span>    e8/call  clear-stream/disp32
+<span id="L765" class="LineNr">765 </span>    <span class="subxS2Comment"># . . discard args</span>
+<span id="L766" class="LineNr">766 </span>    81          0/subop/add         3/mod/direct    4/rm32/ESP   <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>           <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>              4/imm32           <span class="subxComment"># add to ESP</span>
+<span id="L767" class="LineNr">767 </span>    <span class="subxS1Comment"># . clear-stream(_test-buffered-file+4)</span>
+<span id="L768" class="LineNr">768 </span>    <span class="subxS2Comment"># . . push args</span>
+<span id="L769" class="LineNr">769 </span>    b8/copy-to-EAX  _test-buffered-file/imm32
+<span id="L770" class="LineNr">770 </span>    05/add-to-EAX  4/imm32
+<span id="L771" class="LineNr">771 </span>    50/push-EAX
+<span id="L772" class="LineNr">772 </span>    <span class="subxS2Comment"># . . call</span>
+<span id="L773" class="LineNr">773 </span>    e8/call  clear-stream/disp32
+<span id="L774" class="LineNr">774 </span>    <span class="subxS2Comment"># . . discard args</span>
+<span id="L775" class="LineNr">775 </span>    81          0/subop/add         3/mod/direct    4/rm32/ESP   <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>           <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>              4/imm32           <span class="subxComment"># add to ESP</span>
+<span id="L776" class="LineNr">776 </span>    <span class="subxComment"># initialize '_test-stream' to &quot;abc\nde&quot;</span>
+<span id="L777" class="LineNr">777 </span>    <span class="subxS1Comment"># . write(_test-stream, &quot;abc&quot;)</span>
+<span id="L778" class="LineNr">778 </span>    <span class="subxS2Comment"># . . push args</span>
+<span id="L779" class="LineNr">779 </span>    68/push  <span class="Constant">&quot;abc&quot;</span>/imm32
+<span id="L780" class="LineNr">780 </span>    68/push  _test-stream/imm32
+<span id="L781" class="LineNr">781 </span>    <span class="subxS2Comment"># . . call</span>
+<span id="L782" class="LineNr">782 </span>    e8/call  write/disp32
+<span id="L783" class="LineNr">783 </span>    <span class="subxS2Comment"># . . discard args</span>
+<span id="L784" class="LineNr">784 </span>    81          0/subop/add         3/mod/direct    4/rm32/ESP   <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>           <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>              8/imm32           <span class="subxComment"># add to ESP</span>
+<span id="L785" class="LineNr">785 </span>    <span class="subxS1Comment"># . write(_test-stream, Newline)</span>
+<span id="L786" class="LineNr">786 </span>    <span class="subxS2Comment"># . . push args</span>
+<span id="L787" class="LineNr">787 </span>    68/push  <span class="SpecialChar">Newline</span>/imm32
+<span id="L788" class="LineNr">788 </span>    68/push  _test-stream/imm32
+<span id="L789" class="LineNr">789 </span>    <span class="subxS2Comment"># . . call</span>
+<span id="L790" class="LineNr">790 </span>    e8/call  write/disp32
+<span id="L791" class="LineNr">791 </span>    <span class="subxS2Comment"># . . discard args</span>
+<span id="L792" class="LineNr">792 </span>    81          0/subop/add         3/mod/direct    4/rm32/ESP   <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>           <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>              8/imm32           <span class="subxComment"># add to ESP</span>
+<span id="L793" class="LineNr">793 </span>    <span class="subxS1Comment"># . write(_test-stream, &quot;de&quot;)</span>
+<span id="L794" class="LineNr">794 </span>    <span class="subxS2Comment"># . . push args</span>
+<span id="L795" class="LineNr">795 </span>    68/push  <span class="Constant">&quot;de&quot;</span>/imm32
+<span id="L796" class="LineNr">796 </span>    68/push  _test-stream/imm32
+<span id="L797" class="LineNr">797 </span>    <span class="subxS2Comment"># . . call</span>
+<span id="L798" class="LineNr">798 </span>    e8/call  write/disp32
+<span id="L799" class="LineNr">799 </span>    <span class="subxS2Comment"># . . discard args</span>
+<span id="L800" class="LineNr">800 </span>    81          0/subop/add         3/mod/direct    4/rm32/ESP   <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>           <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>              8/imm32           <span class="subxComment"># add to ESP</span>
+<span id="L801" class="LineNr">801 </span>    <span class="subxComment"># skip-until-newline(_test-buffered-file)</span>
+<span id="L802" class="LineNr">802 </span>    <span class="subxS2Comment"># . . push args</span>
+<span id="L803" class="LineNr">803 </span>    68/push  _test-buffered-file/imm32
+<span id="L804" class="LineNr">804 </span>    <span class="subxS2Comment"># . . call</span>
+<span id="L805" class="LineNr">805 </span>    e8/call  skip-until-newline/disp32
+<span id="L806" class="LineNr">806 </span>    <span class="subxS2Comment"># . . discard args</span>
+<span id="L807" class="LineNr">807 </span>    81          0/subop/add         3/mod/direct    4/rm32/ESP   <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>           <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>              4/imm32           <span class="subxComment"># add to ESP</span>
+<span id="L808" class="LineNr">808 </span>    <span class="subxComment"># check-ints-equal(_test-buffered-file-&gt;read, 4, msg)</span>
+<span id="L809" class="LineNr">809 </span>    <span class="subxS2Comment"># . . push args</span>
+<span id="L810" class="LineNr">810 </span>    68/push  <span class="Constant">&quot;F - test-skip-until-newline&quot;</span>/imm32
+<span id="L811" class="LineNr">811 </span>    68/push  4/imm32
+<span id="L812" class="LineNr">812 </span>    b8/copy-to-EAX  _test-buffered-file/imm32
+<span id="L813" class="LineNr">813 </span>    ff          6/subop/push        1/mod/*+disp8   0/rm32/EAX   <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>           <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>          8/disp8        <span class="CommentedCode"> . </span>                <span class="subxComment"># push *(EAX+8)</span>
+<span id="L814" class="LineNr">814 </span>    <span class="subxS2Comment"># . . call</span>
+<span id="L815" class="LineNr">815 </span>    e8/call  check-ints-equal/disp32
+<span id="L816" class="LineNr">816 </span>    <span class="subxS2Comment"># . . discard args</span>
+<span id="L817" class="LineNr">817 </span>    81          0/subop/add         3/mod/direct    4/rm32/ESP   <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>           <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>         <span class="CommentedCode"> . </span>              0xc/imm32         <span class="subxComment"># add to ESP</span>
+<span id="L818" class="LineNr">818 </span>    <span class="subxS1Comment"># . end</span>
+<span id="L819" class="LineNr">819 </span>    c3/return
+<span id="L820" class="LineNr">820 </span>
+<span id="L821" class="LineNr">821 </span>== data
+<span id="L822" class="LineNr">822 </span>
+<span id="L823" class="LineNr">823 </span><span class="subxS2Comment"># . . vim&#0058;nowrap:textwidth=0</span>
+</pre>
+</body>
+</html>
+<!-- vim: set foldmethod=manual : -->