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| -rw-r--r-- | html/subx/apps/hex.subx.html | 892 | ||||
| -rw-r--r-- | subx/apps/hex | bin | 0 -> 8510 bytes | |||
| -rw-r--r-- | subx/apps/hex.subx | 823 |
3 files changed, 1715 insertions, 0 deletions
diff --git a/html/subx/apps/hex.subx.html b/html/subx/apps/hex.subx.html new file mode 100644 index 00000000..ddfefd90 --- /dev/null +++ b/html/subx/apps/hex.subx.html @@ -0,0 +1,892 @@ +<!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 > 1 and argv[1] == "test" then return run_tests()</span> +<span id="L28" class="LineNr"> 28 </span> <span class="subxS1Comment"># . argc > 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] == "test"</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">"test"</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->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) -> <void></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) -> 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("partial byte found")</span> +<span id="L120" class="LineNr">120 </span> <span class="subxComment"># ECX = (ECX << 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) -> 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, "unexpected byte: " 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">"scan-next-byte: invalid byte"</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 "abc"</span> +<span id="L252" class="LineNr">252 </span> <span class="subxS1Comment"># . write(_test-stream, "abc")</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">"abc"</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">"F - test-scan-next-byte"</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">" abc"</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">"F - test-scan-next-byte-skips-whitespace"</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">"#x"</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">"ab"</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">"F - test-scan-next-byte-skips-comment"</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">"#x"</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">" ab"</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">"F - test-scan-next-byte-skips-comment"</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">" #x"</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">"ab"</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">"F - test-scan-next-byte-skips-comment"</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">"a"</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">"F - test-scan-next-byte-skips-comment"</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 -> 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 < '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 > '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 <= '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 >= '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">"F - test-hex-below-0"</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">"F - test-hex-at-0"</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">"F - test-hex-at-9"</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">"F - test-hex-above-9-to-a"</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">"F - test-hex-at-a"</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">"F - test-hex-at-f"</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">"F - test-hex-above-f"</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) -> <void></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 "abc\nde"</span> +<span id="L777" class="LineNr">777 </span> <span class="subxS1Comment"># . write(_test-stream, "abc")</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">"abc"</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, "de")</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">"de"</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->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">"F - test-skip-until-newline"</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:nowrap:textwidth=0</span> +</pre> +</body> +</html> +<!-- vim: set foldmethod=manual : --> diff --git a/subx/apps/hex b/subx/apps/hex new file mode 100644 index 00000000..f56f59eb --- /dev/null +++ b/subx/apps/hex Binary files differdiff --git a/subx/apps/hex.subx b/subx/apps/hex.subx new file mode 100644 index 00000000..641912f1 --- /dev/null +++ b/subx/apps/hex.subx @@ -0,0 +1,823 @@ +# Read a text file containing whitespace-separated ascii hex bytes from stdin, +# and convert them into a binary file. +# +# To run (from the subx/ directory): +# $ ./subx translate *.subx apps/hex.subx -o apps/hex +# $ echo '80 81 82 # comment' |./subx run apps/hex |xxd - +# Expected output: +# 09000000: 8081 82 +# +# Only hex bytes and comments are permitted. Outside of comments all words +# must be exactly 2 characters long and contain only characters [0-9a-f]. No +# uppercase hex. + +== code +# instruction effective address register displacement immediate +# . op subop mod rm32 base index scale r32 +# . 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 + + # for debugging: run a single test +#? e8/call test-skip-until-newline/disp32 +#? 8b/copy 0/mod/indirect 5/rm32/.disp32 . . 3/r32/EBX Num-test-failures/disp32 # copy *Num-test-failures to EBX +#? eb/jump $main:end/disp8 + +# main: run tests if necessary, convert stdin if not + # . prolog + 89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP + # - if argc > 1 and argv[1] == "test" then return run_tests() + # . argc > 1 + 81 7/subop/compare 1/mod/*+disp8 4/rm32/sib 5/base/EBP 4/index/none . . 0/disp8 1/imm32 # compare *EBP + 7e/jump-if-lesser-or-equal $run-main/disp8 + # . argv[1] == "test" + # . . push args + 68/push "test"/imm32 + ff 6/subop/push 1/mod/*+disp8 4/rm32/sib 5/base/EBP 4/index/none . . 0x8/disp8 . # push *(EBP+8) + # . . call + e8/call kernel-string-equal/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP + # . check result + 3d/compare-EAX 1/imm32 + 75/jump-if-not-equal $run-main/disp8 + # . run-tests() +#? e8/call test-hex-below-0/disp32 +#? e8/call test-scan-next-byte/disp32 +#? e8/call test-scan-next-byte-skips-comment/disp32 + e8/call run-tests/disp32 + 8b/copy 0/mod/indirect 5/rm32/.disp32 . . 3/r32/EBX Num-test-failures/disp32 # copy *Num-test-failures to EBX + eb/jump $main:end/disp8 +$run-main: + # - otherwise convert stdin + # var ed/EAX : exit-descriptor + 81 5/subop/subtract 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # subtract from ESP + 8d/copy-address 0/mod/indirect 4/rm32/sib 4/base/ESP 4/index/none . 0/r32/EAX . . # copy ESP to EAX + # configure ed to really exit() + # . ed->target = 0 + c7/copy 0/mod/direct 0/rm32/EAX . . . . . 0/imm32 # copy to *EAX + # return convert(Stdin, 1/stdout, 2/stderr, ed) + # . . push args + 50/push-EAX/ed + 68/push 2/imm32/stderr + 68/push 1/imm32/stdout + 68/push Stdin/imm32 + # . . call + e8/call convert/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0x10/imm32 # add to ESP + # . syscall(exit, 0) + bb/copy-to-EBX 0/imm32 +$main:end: + b8/copy-to-EAX 1/imm32/exit + cd/syscall 0x80/imm8 + +# the main entry point +convert: # in : (address buffered-file), out : (address buffered-file), err : (address buffered-file), ed : (address exit-descriptor) -> <void> + # pseudocode: + # repeatedly + # EAX = convert-next-hex-byte(in, err, ed) + # if EAX == 0xffffffff break # eof + # write-byte(out, EAX) + # flush(out) + # + # . prolog + 55/push-EBP + 89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP + # . save registers + # var buf/ECX : (address stream) on the stack + # It occupies 1KB. + 81 5/subop/subtract 3/mod/direct 4/rm32/ESP . . . . . 0x400/imm32 # subtract from ESP + 8d/copy-address 0/mod/indirect 4/rm32/sib 4/base/ESP 4/index/none . 1/r32/ECX . . # copy ESP to ECX + # initialize the stream + # . length = 1KB - 12 bytes for 'read', 'write' and 'length' fields. + c7/copy 1/mod/*+disp8 1/rm32/ECX . . . . 8/disp8 0x3f4/imm32 # copy to *(ECX+8) + # . clear-stream(buf) + # . . push args + 51/push-ECX + # . . call + e8/call clear-stream/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP +$convert:loop: + # . restore registers + # . epilog + 89/copy 3/mod/direct 4/rm32/ESP . . . 5/r32/EBP . . # copy EBP to ESP + 5d/pop-to-EBP + c3/return + +# read bytes from 'in' until a sequence of two lowercase hex characters (0-9, a-f) +# skip spaces and newlines +# on '#' skip bytes until newline +# raise an error and abort on all other unexpected bytes +# return the binary value of the two hex characters in EAX +# return 0xffffffff on end of file +convert-next-hex-byte: # in : (address buffered-file), err : (address buffered-file), ed : (address exit-descriptor) -> byte-or-eof/EAX + # pseudocode: + # EAX = scan-next-byte(in, err, ed) + # if (EAX == 0xffffffff) return + # ECX = EAX + # EAX = scan-next-byte(in, err, ed) + # if (EAX == 0xffffffff) error("partial byte found") + # ECX = (ECX << 8) | EAX + # return + # + # . prolog + 55/push-EBP + 89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP + # . save registers + # var buf/ECX : (address stream) on the stack + # It occupies 1KB. + 81 5/subop/subtract 3/mod/direct 4/rm32/ESP . . . . . 0x400/imm32 # subtract from ESP + 8d/copy-address 0/mod/indirect 4/rm32/sib 4/base/ESP 4/index/none . 1/r32/ECX . . # copy ESP to ECX + # initialize the stream + # . length = 1KB - 12 bytes for 'read', 'write' and 'length' fields. + c7/copy 1/mod/*+disp8 1/rm32/ECX . . . . 8/disp8 0x3f4/imm32 # copy to *(ECX+8) + # . clear-stream(buf) + # . . push args + 51/push-ECX + # . . call + e8/call clear-stream/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP +$convert:loop: + # . restore registers + # . epilog + 89/copy 3/mod/direct 4/rm32/ESP . . . 5/r32/EBP . . # copy EBP to ESP + 5d/pop-to-EBP + c3/return + +# read whitespace until a hex byte, and return it +# return 0xffffffff if file ends without finding a hex byte +# on '#' skip all bytes until newline +# abort on any other byte +scan-next-byte: # in : (address buffered-file), err : (address buffered-file), ed : (address exit-descriptor) -> byte-or-eof/EAX + # pseudocode: + # repeatedly + # EAX = read-byte(in) + # if is-hex-lowercase-byte?(EAX) return EAX + # if EAX == 0x20 continue + # if EAX == '#' skip-until-newline(in) + # else error-byte(ed, err, "unexpected byte: " EAX) + # return 0xffffffff + # + # . prolog + 55/push-EBP + 89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP + # . save registers +$scan-next-byte:loop: + # EAX = read-byte(in) + # . . push args + ff 6/subop/push 1/mod/*+disp8 4/rm32/sib 5/base/EBP 4/index/none . . 0x8/disp8 . # push *(EBP+8) + # . . call + e8/call read-byte/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP + # if is-hex-lowercase-byte?(EAX) return EAX + # . save EAX for now + 50/push-EAX + # . is-hex-lowercase-byte?(EAX) + # . . push args + 50/push-EAX + # . . call + e8/call is-hex-lowercase-byte?/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP + # . compare with 'false' + 81 7/subop/compare 3/mod/direct 0/rm32/EAX . . . . . 0/imm32 # compare EAX + # . restore EAX (does not affect flags) + 58/pop-to-EAX + # . check whether to return + 75/jump-if-not-equal $scan-next-byte:end/disp8 +$scan-next-byte:check1: + # if EAX == ' ' continue + 81 7/subop/compare 3/mod/direct 0/rm32/EAX . . . . . 0x20/imm32 # compare EAX + 74/jump-if-equal $scan-next-byte:loop/disp8 +$aa: + # if EAX == '\t' continue + 81 7/subop/compare 3/mod/direct 0/rm32/EAX . . . . . 0x9/imm32 # compare EAX + 74/jump-if-equal $scan-next-byte:loop/disp8 +$bb: + # if EAX == '\n' continue + 81 7/subop/compare 3/mod/direct 0/rm32/EAX . . . . . 0xa/imm32 # compare EAX + 74/jump-if-equal $scan-next-byte:loop/disp8 +$scan-next-byte:check2: + # if EAX == '#' skip-until-newline(in) + 3d/compare-with-EAX 0x23/imm32 + 75/jump-if-not-equal $scan-next-byte:check3/disp8 +$cc: + # . skip-until-newline(in) + # . . push args + ff 6/subop/push 1/mod/*+disp8 4/rm32/sib 5/base/EBP 4/index/none . . 0x8/disp8 . # push *(EBP+8) + # . . call + e8/call skip-until-newline/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP + eb/jump $scan-next-byte:loop/disp8 +$scan-next-byte:check3: +# TODO: error-byte takes a buffered-file, not a (fd or (address stream)) + # otherwise error-byte(ed, err, msg, EAX) + # . . push args + 50/push-EAX + 68/push "scan-next-byte: invalid byte"/imm32 + ff 6/subop/push 1/mod/*+disp8 4/rm32/sib 5/base/EBP 4/index/none . . 0xc/disp8 . # push *(EBP+12) + ff 6/subop/push 1/mod/*+disp8 4/rm32/sib 5/base/EBP 4/index/none . . 0x10/disp8 . # push *(EBP+16) + # . . call + e8/call error-byte/disp32 # never returns +$scan-next-byte:end: + # . restore registers + # . epilog + 89/copy 3/mod/direct 4/rm32/ESP . . . 5/r32/EBP . . # copy EBP to ESP + 5d/pop-to-EBP + c3/return + +test-scan-next-byte: + # - check that the first two bytes of the input are assembled into the resulting number + # setup + # . clear-stream(_test-stream) + # . . push args + 68/push _test-stream/imm32 + # . . call + e8/call clear-stream/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP + # . clear-stream(_test-buffered-file+4) + # . . push args + b8/copy-to-EAX _test-buffered-file/imm32 + 05/add-to-EAX 4/imm32 + 50/push-EAX + # . . call + e8/call clear-stream/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP + # initialize '_test-stream' to "abc" + # . write(_test-stream, "abc") + # . . push args + 68/push "abc"/imm32 + 68/push _test-stream/imm32 + # . . call + e8/call write/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP + # scan-next-byte(_test-buffered-file) + # . . push args + 68/push _test-buffered-file/imm32 + # . . call + e8/call scan-next-byte/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP + # check-ints-equal(EAX, 0x61/a, msg) + # . . push args + 68/push "F - test-scan-next-byte"/imm32 + 68/push 0x61/imm32/a + 50/push-EAX + # . . call + e8/call check-ints-equal/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP + # . end + c3/return + +test-scan-next-byte-skips-whitespace: + # - check that the first two bytes of the input are assembled into the resulting number + # setup + # . clear-stream(_test-stream) + # . . push args + 68/push _test-stream/imm32 + # . . call + e8/call clear-stream/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP + # . clear-stream(_test-buffered-file+4) + # . . push args + b8/copy-to-EAX _test-buffered-file/imm32 + 05/add-to-EAX 4/imm32 + 50/push-EAX + # . . call + e8/call clear-stream/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP + # initialize '_test-stream' to input with leading whitespace + # . write(_test-stream, text) + # . . push args + 68/push " abc"/imm32 + 68/push _test-stream/imm32 + # . . call + e8/call write/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP + # scan-next-byte(_test-buffered-file) + # . . push args + 68/push _test-buffered-file/imm32 + # . . call + e8/call scan-next-byte/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP + # check-ints-equal(EAX, 0x61/a, msg) + # . . push args + 68/push "F - test-scan-next-byte-skips-whitespace"/imm32 + 68/push 0x61/imm32/a + 50/push-EAX + # . . call + e8/call check-ints-equal/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP + # . end + c3/return + +test-scan-next-byte-skips-comment: + # - check that the first two bytes of the input are assembled into the resulting number + # setup + # . clear-stream(_test-stream) + # . . push args + 68/push _test-stream/imm32 + # . . call + e8/call clear-stream/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP + # . clear-stream(_test-buffered-file+4) + # . . push args + b8/copy-to-EAX _test-buffered-file/imm32 + 05/add-to-EAX 4/imm32 + 50/push-EAX + # . . call + e8/call clear-stream/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP + # initialize '_test-stream' to input with leading comment + # . write(_test-stream, comment) + # . . push args + 68/push "#x"/imm32 + 68/push _test-stream/imm32 + # . . call + e8/call write/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP + # . write(_test-stream, Newline) + # . . push args + 68/push Newline/imm32 + 68/push _test-stream/imm32 + # . . call + e8/call write/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP + # . write(_test-stream, real text) + # . . push args + 68/push "ab"/imm32 + 68/push _test-stream/imm32 + # . . call + e8/call write/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP + # scan-next-byte(_test-buffered-file) + # . . push args + 68/push _test-buffered-file/imm32 + # . . call + e8/call scan-next-byte/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP + # check-ints-equal(EAX, 0x61/a, msg) + # . . push args + 68/push "F - test-scan-next-byte-skips-comment"/imm32 + 68/push 0x61/imm32/a + 50/push-EAX + # . . call + e8/call check-ints-equal/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP + # . end + c3/return + +test-scan-next-byte-skips-comment-and-whitespace: + # - check that the first two bytes of the input are assembled into the resulting number + # setup + # . clear-stream(_test-stream) + # . . push args + 68/push _test-stream/imm32 + # . . call + e8/call clear-stream/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP + # . clear-stream(_test-buffered-file+4) + # . . push args + b8/copy-to-EAX _test-buffered-file/imm32 + 05/add-to-EAX 4/imm32 + 50/push-EAX + # . . call + e8/call clear-stream/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP + # initialize '_test-stream' to input with leading comment and more whitespace after newline + # . write(_test-stream, comment) + # . . push args + 68/push "#x"/imm32 + 68/push _test-stream/imm32 + # . . call + e8/call write/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP + # . write(_test-stream, Newline) + # . . push args + 68/push Newline/imm32 + 68/push _test-stream/imm32 + # . . call + e8/call write/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP + # . write(_test-stream, real text) + # . . push args + 68/push " ab"/imm32 + 68/push _test-stream/imm32 + # . . call + e8/call write/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP + # scan-next-byte(_test-buffered-file) + # . . push args + 68/push _test-buffered-file/imm32 + # . . call + e8/call scan-next-byte/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP + # check-ints-equal(EAX, 0x61/a, msg) + # . . push args + 68/push "F - test-scan-next-byte-skips-comment"/imm32 + 68/push 0x61/imm32/a + 50/push-EAX + # . . call + e8/call check-ints-equal/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP + # . end + c3/return + +test-scan-next-byte-skips-whitespace-and-comment: + # - check that the first two bytes of the input are assembled into the resulting number + # setup + # . clear-stream(_test-stream) + # . . push args + 68/push _test-stream/imm32 + # . . call + e8/call clear-stream/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP + # . clear-stream(_test-buffered-file+4) + # . . push args + b8/copy-to-EAX _test-buffered-file/imm32 + 05/add-to-EAX 4/imm32 + 50/push-EAX + # . . call + e8/call clear-stream/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP + # initialize '_test-stream' to input with leading whitespace and comment + # . write(_test-stream, comment) + # . . push args + 68/push " #x"/imm32 + 68/push _test-stream/imm32 + # . . call + e8/call write/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP + # . write(_test-stream, Newline) + # . . push args + 68/push Newline/imm32 + 68/push _test-stream/imm32 + # . . call + e8/call write/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP + # . write(_test-stream, real text) + # . . push args + 68/push "ab"/imm32 + 68/push _test-stream/imm32 + # . . call + e8/call write/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP + # scan-next-byte(_test-buffered-file) + # . . push args + 68/push _test-buffered-file/imm32 + # . . call + e8/call scan-next-byte/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP + # check-ints-equal(EAX, 0x61/a, msg) + # . . push args + 68/push "F - test-scan-next-byte-skips-comment"/imm32 + 68/push 0x61/imm32/a + 50/push-EAX + # . . call + e8/call check-ints-equal/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP + # . end + c3/return + +test-scan-next-byte-reads-final-byte: + # - check that the first two bytes of the input are assembled into the resulting number + # setup + # . clear-stream(_test-stream) + # . . push args + 68/push _test-stream/imm32 + # . . call + e8/call clear-stream/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP + # . clear-stream(_test-buffered-file+4) + # . . push args + b8/copy-to-EAX _test-buffered-file/imm32 + 05/add-to-EAX 4/imm32 + 50/push-EAX + # . . call + e8/call clear-stream/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP + # initialize '_test-stream' to input with single character + # . write(_test-stream, character) + # . . push args + 68/push "a"/imm32 + 68/push _test-stream/imm32 + # . . call + e8/call write/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP + # scan-next-byte(_test-buffered-file) + # . . push args + 68/push _test-buffered-file/imm32 + # . . call + e8/call scan-next-byte/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP + # check-ints-equal(EAX, 0x61/a, msg) + # . . push args + 68/push "F - test-scan-next-byte-skips-comment"/imm32 + 68/push 0x61/imm32/a + 50/push-EAX + # . . call + e8/call check-ints-equal/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP + # . end + c3/return + +is-hex-lowercase-byte?: # c : byte -> bool/EAX + # . prolog + 55/push-EBP + 89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP + # . save registers + 51/push-ECX + # ECX = c + 8b/copy 1/mod/*+disp8 4/rm32/sib 5/base/EBP 4/index/none . 1/r32/ECX 0x8/disp8 . # copy *(EBP+8) to ECX + # return false if c < '0' + b8/copy-to-EAX 0/imm32/false + 81 7/subop/compare 3/mod/direct 1/rm32/ECX . . . . . 0x30/imm32 # compare ECX + 7c/jump-if-lesser $is-hex-lowercase-byte?:end/disp8 + # return false if c > 'f' + 81 7/subop/compare 3/mod/direct 1/rm32/ECX . . . . . 0x66/imm32 # compare ECX + 7f/jump-if-greater $is-hex-lowercase-byte?:end/disp8 + # return true if c <= '9' + b8/copy-to-EAX 1/imm32/true + 81 7/subop/compare 3/mod/direct 1/rm32/ECX . . . . . 0x39/imm32 # compare ECX + 7e/jump-if-lesser-or-equal $is-hex-lowercase-byte?:end/disp8 + # return true if c >= 'a' + 81 7/subop/compare 3/mod/direct 1/rm32/ECX . . . . . 0x61/imm32 # compare ECX + 7d/jump-if-greater-or-equal $is-hex-lowercase-byte?:end/disp8 + # otherwise return false + b8/copy-to-EAX 0/imm32/false +$is-hex-lowercase-byte?:end: + # . restore registers + 59/pop-to-ECX + # . epilog + 89/copy 3/mod/direct 4/rm32/ESP . . . 5/r32/EBP . . # copy EBP to ESP + 5d/pop-to-EBP + c3/return + +test-hex-below-0: + # is-hex-lowercase-byte?(0x2f) + # . . push args + 68/push 0x2f/imm32 + # . . call + e8/call is-hex-lowercase-byte?/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP + # check-ints-equal(EAX, 0, msg) + # . . push args + 68/push "F - test-hex-below-0"/imm32 + 68/push 0/imm32/false + 50/push-EAX + # . . call + e8/call check-ints-equal/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP + c3/return + +test-hex-0-to-9: + # is-hex-lowercase-byte?(0x30) + # . . push args + 68/push 0x30/imm32 + # . . call + e8/call is-hex-lowercase-byte?/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP + # check-ints-equal(EAX, 1, msg) + # . . push args + 68/push "F - test-hex-at-0"/imm32 + 68/push 1/imm32/true + 50/push-EAX + # . . call + e8/call check-ints-equal/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP + # is-hex-lowercase-byte?(0x39) + # . . push args + 68/push 0x39/imm32 + # . . call + e8/call is-hex-lowercase-byte?/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP + # check-ints-equal(EAX, 1, msg) + # . . push args + 68/push "F - test-hex-at-9"/imm32 + 68/push 1/imm32/true + 50/push-EAX + # . . call + e8/call check-ints-equal/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP + c3/return + +test-hex-above-9-to-a: + # is-hex-lowercase-byte?(0x3a) + # . . push args + 68/push 0x3a/imm32 + # . . call + e8/call is-hex-lowercase-byte?/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP + # check-ints-equal(EAX, 0, msg) + # . . push args + 68/push "F - test-hex-above-9-to-a"/imm32 + 68/push 0/imm32/false + 50/push-EAX + # . . call + e8/call check-ints-equal/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP + c3/return + +test-hex-a-to-f: + # is-hex-lowercase-byte?(0x61) + # . . push args + 68/push 0x61/imm32 + # . . call + e8/call is-hex-lowercase-byte?/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP + # check-ints-equal(EAX, 1, msg) + # . . push args + 68/push "F - test-hex-at-a"/imm32 + 68/push 1/imm32/true + 50/push-EAX + # . . call + e8/call check-ints-equal/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP + # is-hex-lowercase-byte?(0x66) + # . . push args + 68/push 0x66/imm32 + # . . call + e8/call is-hex-lowercase-byte?/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP + # check-ints-equal(EAX, 1, msg) + # . . push args + 68/push "F - test-hex-at-f"/imm32 + 68/push 1/imm32/true + 50/push-EAX + # . . call + e8/call check-ints-equal/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP + c3/return + +test-hex-above-f: + # is-hex-lowercase-byte?(0x67) + # . . push args + 68/push 0x67/imm32 + # . . call + e8/call is-hex-lowercase-byte?/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP + # check-ints-equal(EAX, 0, msg) + # . . push args + 68/push "F - test-hex-above-f"/imm32 + 68/push 0/imm32/false + 50/push-EAX + # . . call + e8/call check-ints-equal/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP + c3/return + +skip-until-newline: # in : (address buffered-file) -> <void> + # pseudocode: + # push EAX + # repeatedly: + # EAX = read-byte(in) + # if EAX == 0xffffffff break + # if EAX == 0x0a break + # pop EAX + # . prolog + 55/push-EBP + 89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP + # . save registers + 50/push-EAX +$skip-until-newline:loop: + # . EAX = read-byte(in) + # . . push args + ff 6/subop/push 1/mod/*+disp8 4/rm32/sib 5/base/EBP 4/index/none . . 0x8/disp8 . # push *(EBP+8) + # . . call + e8/call read-byte/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP + # . if EAX == 0xffffffff break + 81 7/subop/compare 3/mod/direct 0/rm32/EAX . . . . . 0xffffffff/imm32 # compare EAX + 74/jump-if-equal $skip-until-newline:end/disp8 +$aa: + # . if EAX != 0xa/newline loop + 81 7/subop/compare 3/mod/direct 0/rm32/EAX . . . . . 0xa/imm32 # compare EAX + 75/jump-if-not-equal $skip-until-newline:loop/disp8 +$skip-until-newline:end: + # . restore registers + 58/pop-to-EAX + # . epilog + 89/copy 3/mod/direct 4/rm32/ESP . . . 5/r32/EBP . . # copy EBP to ESP + 5d/pop-to-EBP + c3/return + +test-skip-until-newline: + # - check that the read pointer points after the newline + # setup + # . clear-stream(_test-stream) + # . . push args + 68/push _test-stream/imm32 + # . . call + e8/call clear-stream/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP + # . clear-stream(_test-buffered-file+4) + # . . push args + b8/copy-to-EAX _test-buffered-file/imm32 + 05/add-to-EAX 4/imm32 + 50/push-EAX + # . . call + e8/call clear-stream/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP + # initialize '_test-stream' to "abc\nde" + # . write(_test-stream, "abc") + # . . push args + 68/push "abc"/imm32 + 68/push _test-stream/imm32 + # . . call + e8/call write/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP + # . write(_test-stream, Newline) + # . . push args + 68/push Newline/imm32 + 68/push _test-stream/imm32 + # . . call + e8/call write/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP + # . write(_test-stream, "de") + # . . push args + 68/push "de"/imm32 + 68/push _test-stream/imm32 + # . . call + e8/call write/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 8/imm32 # add to ESP + # skip-until-newline(_test-buffered-file) + # . . push args + 68/push _test-buffered-file/imm32 + # . . call + e8/call skip-until-newline/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 4/imm32 # add to ESP + # check-ints-equal(_test-buffered-file->read, 4, msg) + # . . push args + 68/push "F - test-skip-until-newline"/imm32 + 68/push 4/imm32 + b8/copy-to-EAX _test-buffered-file/imm32 + ff 6/subop/push 1/mod/*+disp8 0/rm32/EAX . . . . 8/disp8 . # push *(EAX+8) + # . . call + e8/call check-ints-equal/disp32 + # . . discard args + 81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP + # . end + c3/return + +== data + +# . . vim:nowrap:textwidth=0 |