5607 - start of notation for function calls

2 files changed, 495 insertions, 0 deletions

diff --git a/apps/calls.subx b/apps/calls.subx
new file mode 100644
index 00000000..67f4027b
--- /dev/null
+++ b/apps/calls.subx
@@ -0,0 +1,216 @@
+# Function calls in a single line.
+#
+# To run (on Linux):
+#   $ ./ntranslate 0*.subx apps/subx-common.subx apps/calls.subx
+#   $ mv a.elf apps/calls
+#   $ chmod +x apps/calls
+#
+# Example 1:
+#   $ echo '(foo %eax)'                         |  apps/calls
+#   # . (foo %eax)                                      # output has comments
+#   ff 6/subop/push %eax                                # push
+#   e8/call foo/disp32                                  # call
+#   81 0/subop/add %esp 4/imm32                         # undo push
+#
+# Example 2:
+#   $ echo '(foo Var1 *(eax + 4) "blah")'       |  apps/calls
+#   # . (foo Var1 *(eax + 4) "blah")
+#   68/push "blah"/imm32
+#   ff 6/subop/push *(eax + 4)                          # push args in..
+#   68/push Var1/imm32                                  # ..reverse order
+#   e8/call foo/disp32
+#   81 0/subop/add %esp 4/imm32                         # undo pushes
+#
+# Calls always begin with '(' as the first non-whitespace on a line.
+
+== code
+
+Entry:  # run tests if necessary, convert stdin if not
+    # . prolog
+    89/<- %ebp 4/r32/esp
+
+    # initialize heap
+    # . Heap = new-segment(Heap-size)
+    # . . push args
+    68/push Heap/imm32
+    ff 6/subop/push *Heap-size
+    # . . call
+    e8/call new-segment/disp32
+    # . . discard args
+    81 0/subop/add %esp 8/imm32
+
+    # - if argc > 1 and argv[1] == "test", then return run_tests()
+    # if (argc <= 1) goto run-main
+    81 7/subop/compare *ebp 1/imm32
+    7e/jump-if-lesser-or-equal $run-main/disp8
+    # if (!kernel-string-equal?(argv[1], "test")) goto run-main
+    # . eax = kernel-string-equal?(argv[1], "test")
+    # . . push args
+    68/push "test"/imm32
+    ff 6/subop/push *(ebp+8)
+    # . . call
+    e8/call kernel-string-equal?/disp32
+    # . . discard args
+    81 0/subop/add %esp 8/imm32
+    # . if (eax == 0) goto run-main
+    3d/compare-eax-and 0/imm32
+    74/jump-if-equal $run-main/disp8
+    # run-tests()
+    e8/call run-tests/disp32
+    # syscall(exit, *Num-test-failures)
+    8b/-> *Num-test-failures 3/r32/ebx
+    eb/jump $main:end/disp8
+$run-main:
+    # - otherwise convert stdin
+    # convert(Stdin, Stdout)
+    # . . push args
+    68/push Stdout/imm32
+    68/push Stdin/imm32
+    # . . call
+    e8/call convert/disp32
+    # . . discard args
+    81 0/subop/add %esp 8/imm32
+    # syscall(exit, 0)
+    bb/copy-to-ebx 0/imm32
+$main:end:
+    b8/copy-to-eax 1/imm32/exit
+    cd/syscall 0x80/imm8
+
+convert:  # in : (address buffered-file), out : (address buffered-file) -> <void>
+    # pseudocode:
+    #   var line = new-stream(512, 1)
+    #   var words : (address stream slice) = new-stream(16, 8)  # at most function name and 15 args
+    #   while true
+    #     clear-stream(line)
+    #     read-line-buffered(in, line)
+    #     if (line->write == 0) break                           # end of file
+    #     skip-chars-matching-whitespace(line)
+    #     if line->data[line->read] != '('
+    #       write-stream-data(out, line)
+    #       continue
+    #     # emit comment
+    #     write-buffered(out, "# ")
+    #     write-stream-data(out, line)
+    #     # emit code
+    #     ++line->read  # skip '('
+    #     clear-stream(words)
+    #     words = parse-line(line)
+    #     emit-call(out, words)
+    #   flush(out)
+    #
+    # . prolog
+    55/push-ebp
+    89/<- %ebp 4/r32/esp
+    # . save registers
+    # var line/ecx : (address stream byte) = stream(512)
+    81 5/subop/subtract %esp 0x200/imm32
+    68/push 0x200/imm32/length
+    68/push 0/imm32/read
+    68/push 0/imm32/write
+    89/<- %ecx 4/r32/esp
+    # var words/edx : (address stream slice) = stream(16, 8)
+    81 5/subop/subtract %esp 0x80/imm32
+    68/push 0x80/imm32/length
+    68/push 0/imm32/read
+    68/push 0/imm32/write
+    89/<- %edx 4/r32/esp
+$convert:loop:
+    # clear-stream(line)
+    # . . push args
+    51/push-ecx
+    # . . call
+    e8/call clear-stream/disp32
+    # . . discard args
+    81 0/subop/add %esp 4/imm32
+    # read-line-buffered(in, line)
+    # . . push args
+    51/push-ecx
+    ff 6/subop/push *(ebp+8)
+    # . . call
+    e8/call read-line-buffered/disp32
+    # . . discard args
+    81 0/subop/add %esp 8/imm32
+$convert:check0:
+    # if (line->write == 0) break
+    81 7/subop/compare *ecx 0/imm32
+    0f 84/jump-if-equal $convert:break/disp32
+    # TODO
+    e9/jump $convert:loop/disp32
+$convert:break:
+    # flush(out)
+    # . . push args
+    ff 6/subop/push *(ebp+0xc)
+    # . . call
+    e8/call  flush/disp32
+    # . . discard args
+    81 0/subop/add %esp 4/imm32
+$convert:end:
+    # . reclaim locals
+    81 0/subop/add %esp 0x298/imm32  # 0x20c + 0x8c
+    # . restore registers
+    # . epilog
+    89/<- %esp 5/r32/ebp
+    5d/pop-to-ebp
+    c3/return
+
+parse-line:  # line : (address stream byte), words : (address stream slice)
+    # pseudocode:
+    #   var word-slice : (address slice)
+    #   while true
+    #     word-slice = next-word-string-or-expression-without-metadata(line)
+    #     if slice-empty?(word-slice)
+    #       break                                 # end of line
+    #     write-int(words, word-slice->start)
+    #     write-int(words, word-slice->end)
+    #
+    # . prolog
+    55/push-ebp
+    89/<- %ebp 4/r32/esp
+    # . save registers
+$parse-line:end:
+    # . reclaim locals
+    # . restore registers
+    # . epilog
+    89/<- %esp 5/r32/ebp
+    5d/pop-to-ebp
+    c3/return
+
+emit-call:  # out : (address buffered-file), words : (address stream slice)
+    # pseudocode:
+    #   if (words->write < 8) abort
+    #   curr = &words->data[words->write-8]
+    #   min = words->data
+    #   # emit pushes
+    #   while true
+    #     if (curr <= min) break
+    #     if (*curr == '%' || *curr == '*')
+    #       write-buffered(out, "ff 6/subop/push ")
+    #       write-slice-buffered(out, curr)
+    #       write-buffered(out, "/imm32\n")
+    #     else
+    #       write-buffered(out, "68/push ")
+    #       write-slice-buffered(out, curr)
+    #       write-buffered(out, "/imm32\n")
+    #     curr -= 8
+    #   # emit call
+    #   write-buffered(out, "e8/call ")
+    #   write-slice-buffered(out, curr)
+    #   write-buffered(out, "/disp32\n")
+    #   # emit pops
+    #   write-buffered(out, "81 0/subop/add %esp ")
+    #   print-int32-buffered(out, words->write >> 1 - 4)
+    #   write-buffered(out, "/imm32\n")
+    #
+    # . prolog
+    55/push-ebp
+    89/<- %ebp 4/r32/esp
+    # . save registers
+$emit-call:end:
+    # . reclaim locals
+    # . restore registers
+    # . epilog
+    89/<- %esp  5/r32/ebp
+    5d/pop-to-ebp
+    c3/return
+
+# . . vim:nowrap:textwidth=0
diff --git a/html/apps/calls.subx.html b/html/apps/calls.subx.html
new file mode 100644
index 00000000..e038ab0b
--- /dev/null
+++ b/html/apps/calls.subx.html
@@ -0,0 +1,279 @@
+<!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 - apps/calls.subx</title>
+<meta name="Generator" content="Vim/8.1">
+<meta name="plugin-version" content="vim8.1_v1">
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+  lineNum = lineNum.substr(1); /* strip off '#' */
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+<a href='https://github.com/akkartik/mu/blob/master/apps/calls.subx'>https://github.com/akkartik/mu/blob/master/apps/calls.subx</a>
+<pre id='vimCodeElement'>
+<span id="L1" class="LineNr">  1 </span><span class="subxComment"># Function calls in a single line.</span>
+<span id="L2" class="LineNr">  2 </span><span class="subxComment">#</span>
+<span id="L3" class="LineNr">  3 </span><span class="subxComment"># To run (on Linux):</span>
+<span id="L4" class="LineNr">  4 </span><span class="subxComment">#   $ ./ntranslate 0*.subx apps/subx-common.subx apps/calls.subx</span>
+<span id="L5" class="LineNr">  5 </span><span class="subxComment">#   $ mv a.elf apps/calls</span>
+<span id="L6" class="LineNr">  6 </span><span class="subxComment">#   $ chmod +x apps/calls</span>
+<span id="L7" class="LineNr">  7 </span><span class="subxComment">#</span>
+<span id="L8" class="LineNr">  8 </span><span class="subxComment"># Example 1:</span>
+<span id="L9" class="LineNr">  9 </span><span class="subxComment">#   $ echo '(foo %eax)'                         |  apps/calls</span>
+<span id="L10" class="LineNr"> 10 </span><span class="subxComment">#   # . (foo %eax)                                      # output has comments</span>
+<span id="L11" class="LineNr"> 11 </span><span class="subxComment">#   ff 6/subop/push %eax                                # push</span>
+<span id="L12" class="LineNr"> 12 </span><span class="subxComment">#   e8/call foo/disp32                                  # call</span>
+<span id="L13" class="LineNr"> 13 </span><span class="subxComment">#   81 0/subop/add %esp 4/imm32                         # undo push</span>
+<span id="L14" class="LineNr"> 14 </span><span class="subxComment">#</span>
+<span id="L15" class="LineNr"> 15 </span><span class="subxComment"># Example 2:</span>
+<span id="L16" class="LineNr"> 16 </span><span class="subxComment">#   $ echo '(foo Var1 *(eax + 4) &quot;blah&quot;)'       |  apps/calls</span>
+<span id="L17" class="LineNr"> 17 </span><span class="subxComment">#   # . (foo Var1 *(eax + 4) &quot;blah&quot;)</span>
+<span id="L18" class="LineNr"> 18 </span><span class="subxComment">#   68/push &quot;blah&quot;/imm32</span>
+<span id="L19" class="LineNr"> 19 </span><span class="subxComment">#   ff 6/subop/push *(eax + 4)                          # push args in..</span>
+<span id="L20" class="LineNr"> 20 </span><span class="subxComment">#   68/push Var1/imm32                                  # ..reverse order</span>
+<span id="L21" class="LineNr"> 21 </span><span class="subxComment">#   e8/call foo/disp32</span>
+<span id="L22" class="LineNr"> 22 </span><span class="subxComment">#   81 0/subop/add %esp 4/imm32                         # undo pushes</span>
+<span id="L23" class="LineNr"> 23 </span><span class="subxComment">#</span>
+<span id="L24" class="LineNr"> 24 </span><span class="subxComment"># Calls always begin with '(' as the first non-whitespace on a line.</span>
+<span id="L25" class="LineNr"> 25 </span>
+<span id="L26" class="LineNr"> 26 </span>== code
+<span id="L27" class="LineNr"> 27 </span>
+<span id="L28" class="LineNr"> 28 </span><span class="SpecialChar">Entry</span>:  <span class="subxComment"># run tests if necessary, convert stdin if not</span>
+<span id="L29" class="LineNr"> 29 </span>    <span class="subxS1Comment"># . prolog</span>
+<span id="L30" class="LineNr"> 30 </span>    89/&lt;- %ebp 4/r32/esp
+<span id="L31" class="LineNr"> 31 </span>
+<span id="L32" class="LineNr"> 32 </span>    <span class="subxComment"># initialize heap</span>
+<span id="L33" class="LineNr"> 33 </span>    <span class="subxS1Comment"># . Heap = new-segment(Heap-size)</span>
+<span id="L34" class="LineNr"> 34 </span>    <span class="subxS2Comment"># . . push args</span>
+<span id="L35" class="LineNr"> 35 </span>    68/push <span class="SpecialChar"><a href='../075array-equal.subx.html#L623'>Heap</a></span>/imm32
+<span id="L36" class="LineNr"> 36 </span>    ff 6/subop/push *<span class="SpecialChar">Heap-size</span>
+<span id="L37" class="LineNr"> 37 </span>    <span class="subxS2Comment"># . . call</span>
+<span id="L38" class="LineNr"> 38 </span>    e8/call <a href='../053new-segment.subx.html#L41'>new-segment</a>/disp32
+<span id="L39" class="LineNr"> 39 </span>    <span class="subxS2Comment"># . . discard args</span>
+<span id="L40" class="LineNr"> 40 </span>    81 0/subop/add %esp 8/imm32
+<span id="L41" class="LineNr"> 41 </span>
+<span id="L42" class="LineNr"> 42 </span>    <span class="subxH1Comment"># - if argc &gt; 1 and argv[1] == &quot;test&quot;, then return run_tests()</span>
+<span id="L43" class="LineNr"> 43 </span>    <span class="subxComment"># if (argc &lt;= 1) goto run-main</span>
+<span id="L44" class="LineNr"> 44 </span>    81 7/subop/compare *ebp 1/imm32
+<span id="L45" class="LineNr"> 45 </span>    7e/jump-if-lesser-or-equal $run-main/disp8
+<span id="L46" class="LineNr"> 46 </span>    <span class="subxComment"># if (!kernel-string-equal?(argv[1], &quot;test&quot;)) goto run-main</span>
+<span id="L47" class="LineNr"> 47 </span>    <span class="subxS1Comment"># . eax = kernel-string-equal?(argv[1], &quot;test&quot;)</span>
+<span id="L48" class="LineNr"> 48 </span>    <span class="subxS2Comment"># . . push args</span>
+<span id="L49" class="LineNr"> 49 </span>    68/push <span class="Constant">&quot;test&quot;</span>/imm32
+<span id="L50" class="LineNr"> 50 </span>    ff 6/subop/push *(ebp+8)
+<span id="L51" class="LineNr"> 51 </span>    <span class="subxS2Comment"># . . call</span>
+<span id="L52" class="LineNr"> 52 </span>    e8/call <a href='../052kernel-string-equal.subx.html#L31'>kernel-string-equal?</a>/disp32
+<span id="L53" class="LineNr"> 53 </span>    <span class="subxS2Comment"># . . discard args</span>
+<span id="L54" class="LineNr"> 54 </span>    81 0/subop/add %esp 8/imm32
+<span id="L55" class="LineNr"> 55 </span>    <span class="subxS1Comment"># . if (eax == 0) goto run-main</span>
+<span id="L56" class="LineNr"> 56 </span>    3d/compare-eax-and 0/imm32
+<span id="L57" class="LineNr"> 57 </span>    74/jump-if-equal $run-main/disp8
+<span id="L58" class="LineNr"> 58 </span>    <span class="subxComment"># run-tests()</span>
+<span id="L59" class="LineNr"> 59 </span>    e8/call run-tests/disp32
+<span id="L60" class="LineNr"> 60 </span>    <span class="subxComment"># syscall(exit, *Num-test-failures)</span>
+<span id="L61" class="LineNr"> 61 </span>    8b/-&gt; *<span class="SpecialChar"><a href='../051test.subx.html#L90'>Num-test-failures</a></span> 3/r32/ebx
+<span id="L62" class="LineNr"> 62 </span>    eb/jump $main:end/disp8
+<span id="L63" class="LineNr"> 63 </span><span class="Constant">$run-main</span>:
+<span id="L64" class="LineNr"> 64 </span>    <span class="subxH1Comment"># - otherwise convert stdin</span>
+<span id="L65" class="LineNr"> 65 </span>    <span class="subxComment"># convert(Stdin, Stdout)</span>
+<span id="L66" class="LineNr"> 66 </span>    <span class="subxS2Comment"># . . push args</span>
+<span id="L67" class="LineNr"> 67 </span>    68/push <span class="SpecialChar"><a href='../064write-byte.subx.html#L10'>Stdout</a></span>/imm32
+<span id="L68" class="LineNr"> 68 </span>    68/push <span class="SpecialChar"><a href='../061read-byte.subx.html#L14'>Stdin</a></span>/imm32
+<span id="L69" class="LineNr"> 69 </span>    <span class="subxS2Comment"># . . call</span>
+<span id="L70" class="LineNr"> 70 </span>    e8/call <a href='calls.subx.html#L79'>convert</a>/disp32
+<span id="L71" class="LineNr"> 71 </span>    <span class="subxS2Comment"># . . discard args</span>
+<span id="L72" class="LineNr"> 72 </span>    81 0/subop/add %esp 8/imm32
+<span id="L73" class="LineNr"> 73 </span>    <span class="subxComment"># syscall(exit, 0)</span>
+<span id="L74" class="LineNr"> 74 </span>    bb/copy-to-ebx 0/imm32
+<span id="L75" class="LineNr"> 75 </span><span class="Constant">$main:end</span>:
+<span id="L76" class="LineNr"> 76 </span>    b8/copy-to-eax 1/imm32/exit
+<span id="L77" class="LineNr"> 77 </span>    cd/syscall 0x80/imm8
+<span id="L78" class="LineNr"> 78 </span>
+<span id="L79" class="LineNr"> 79 </span><span class="subxFunction">convert</span>:  <span class="subxComment"># in : (address buffered-file), out : (address buffered-file) -&gt; &lt;void&gt;</span>
+<span id="L80" class="LineNr"> 80 </span>    <span class="subxComment"># pseudocode:</span>
+<span id="L81" class="LineNr"> 81 </span>    <span class="subxComment">#   var line = new-stream(512, 1)</span>
+<span id="L82" class="LineNr"> 82 </span>    <span class="subxComment">#   var words : (address stream slice) = new-stream(16, 8)  # at most function name and 15 args</span>
+<span id="L83" class="LineNr"> 83 </span>    <span class="subxComment">#   while true</span>
+<span id="L84" class="LineNr"> 84 </span>    <span class="subxComment">#     clear-stream(line)</span>
+<span id="L85" class="LineNr"> 85 </span>    <span class="subxComment">#     read-line-buffered(in, line)</span>
+<span id="L86" class="LineNr"> 86 </span>    <span class="subxComment">#     if (line-&gt;write == 0) break                           # end of file</span>
+<span id="L87" class="LineNr"> 87 </span>    <span class="subxComment">#     skip-chars-matching-whitespace(line)</span>
+<span id="L88" class="LineNr"> 88 </span>    <span class="subxComment">#     if line-&gt;data[line-&gt;read] != '('</span>
+<span id="L89" class="LineNr"> 89 </span>    <span class="subxComment">#       write-stream-data(out, line)</span>
+<span id="L90" class="LineNr"> 90 </span>    <span class="subxComment">#       continue</span>
+<span id="L91" class="LineNr"> 91 </span>    <span class="subxComment">#     # emit comment</span>
+<span id="L92" class="LineNr"> 92 </span>    <span class="subxComment">#     write-buffered(out, &quot;# &quot;)</span>
+<span id="L93" class="LineNr"> 93 </span>    <span class="subxComment">#     write-stream-data(out, line)</span>
+<span id="L94" class="LineNr"> 94 </span>    <span class="subxComment">#     # emit code</span>
+<span id="L95" class="LineNr"> 95 </span>    <span class="subxComment">#     ++line-&gt;read  # skip '('</span>
+<span id="L96" class="LineNr"> 96 </span>    <span class="subxComment">#     clear-stream(words)</span>
+<span id="L97" class="LineNr"> 97 </span>    <span class="subxComment">#     words = parse-line(line)</span>
+<span id="L98" class="LineNr"> 98 </span>    <span class="subxComment">#     emit-call(out, words)</span>
+<span id="L99" class="LineNr"> 99 </span>    <span class="subxComment">#   flush(out)</span>
+<span id="L100" class="LineNr">100 </span>    <span class="subxComment">#</span>
+<span id="L101" class="LineNr">101 </span>    <span class="subxS1Comment"># . prolog</span>
+<span id="L102" class="LineNr">102 </span>    55/push-ebp
+<span id="L103" class="LineNr">103 </span>    89/&lt;- %ebp 4/r32/esp
+<span id="L104" class="LineNr">104 </span>    <span class="subxS1Comment"># . save registers</span>
+<span id="L105" class="LineNr">105 </span>    <span class="subxComment"># var line/ecx : (address stream byte) = stream(512)</span>
+<span id="L106" class="LineNr">106 </span>    81 5/subop/subtract %esp 0x200/imm32
+<span id="L107" class="LineNr">107 </span>    68/push 0x200/imm32/length
+<span id="L108" class="LineNr">108 </span>    68/push 0/imm32/read
+<span id="L109" class="LineNr">109 </span>    68/push 0/imm32/write
+<span id="L110" class="LineNr">110 </span>    89/&lt;- %ecx 4/r32/esp
+<span id="L111" class="LineNr">111 </span>    <span class="subxComment"># var words/edx : (address stream slice) = stream(16, 8)</span>
+<span id="L112" class="LineNr">112 </span>    81 5/subop/subtract %esp 0x80/imm32
+<span id="L113" class="LineNr">113 </span>    68/push 0x80/imm32/length
+<span id="L114" class="LineNr">114 </span>    68/push 0/imm32/read
+<span id="L115" class="LineNr">115 </span>    68/push 0/imm32/write
+<span id="L116" class="LineNr">116 </span>    89/&lt;- %edx 4/r32/esp
+<span id="L117" class="LineNr">117 </span><span class="Constant">$convert:loop</span>:
+<span id="L118" class="LineNr">118 </span>    <span class="subxComment"># clear-stream(line)</span>
+<span id="L119" class="LineNr">119 </span>    <span class="subxS2Comment"># . . push args</span>
+<span id="L120" class="LineNr">120 </span>    51/push-ecx
+<span id="L121" class="LineNr">121 </span>    <span class="subxS2Comment"># . . call</span>
+<span id="L122" class="LineNr">122 </span>    e8/call <a href='../055stream.subx.html#L17'>clear-stream</a>/disp32
+<span id="L123" class="LineNr">123 </span>    <span class="subxS2Comment"># . . discard args</span>
+<span id="L124" class="LineNr">124 </span>    81 0/subop/add %esp 4/imm32
+<span id="L125" class="LineNr">125 </span>    <span class="subxComment"># read-line-buffered(in, line)</span>
+<span id="L126" class="LineNr">126 </span>    <span class="subxS2Comment"># . . push args</span>
+<span id="L127" class="LineNr">127 </span>    51/push-ecx
+<span id="L128" class="LineNr">128 </span>    ff 6/subop/push *(ebp+8)
+<span id="L129" class="LineNr">129 </span>    <span class="subxS2Comment"># . . call</span>
+<span id="L130" class="LineNr">130 </span>    e8/call <a href='../071read-line.subx.html#L9'>read-line-buffered</a>/disp32
+<span id="L131" class="LineNr">131 </span>    <span class="subxS2Comment"># . . discard args</span>
+<span id="L132" class="LineNr">132 </span>    81 0/subop/add %esp 8/imm32
+<span id="L133" class="LineNr">133 </span><span class="Constant">$convert:check0</span>:
+<span id="L134" class="LineNr">134 </span>    <span class="subxComment"># if (line-&gt;write == 0) break</span>
+<span id="L135" class="LineNr">135 </span>    81 7/subop/compare *ecx 0/imm32
+<span id="L136" class="LineNr">136 </span>    0f 84/jump-if-equal $convert:break/disp32
+<span id="L137" class="LineNr">137 </span>    <span class="subxComment"># TODO</span>
+<span id="L138" class="LineNr">138 </span>    e9/jump $convert:loop/disp32
+<span id="L139" class="LineNr">139 </span><span class="Constant">$convert:break</span>:
+<span id="L140" class="LineNr">140 </span>    <span class="subxComment"># flush(out)</span>
+<span id="L141" class="LineNr">141 </span>    <span class="subxS2Comment"># . . push args</span>
+<span id="L142" class="LineNr">142 </span>    ff 6/subop/push *(ebp+0xc)
+<span id="L143" class="LineNr">143 </span>    <span class="subxS2Comment"># . . call</span>
+<span id="L144" class="LineNr">144 </span>    e8/call  <a href='../064write-byte.subx.html#L79'>flush</a>/disp32
+<span id="L145" class="LineNr">145 </span>    <span class="subxS2Comment"># . . discard args</span>
+<span id="L146" class="LineNr">146 </span>    81 0/subop/add %esp 4/imm32
+<span id="L147" class="LineNr">147 </span><span class="Constant">$convert:end</span>:
+<span id="L148" class="LineNr">148 </span>    <span class="subxS1Comment"># . reclaim locals</span>
+<span id="L149" class="LineNr">149 </span>    81 0/subop/add %esp 0x298/imm32  <span class="subxComment"># 0x20c + 0x8c</span>
+<span id="L150" class="LineNr">150 </span>    <span class="subxS1Comment"># . restore registers</span>
+<span id="L151" class="LineNr">151 </span>    <span class="subxS1Comment"># . epilog</span>
+<span id="L152" class="LineNr">152 </span>    89/&lt;- %esp 5/r32/ebp
+<span id="L153" class="LineNr">153 </span>    5d/pop-to-ebp
+<span id="L154" class="LineNr">154 </span>    c3/return
+<span id="L155" class="LineNr">155 </span>
+<span id="L156" class="LineNr">156 </span><span class="subxFunction">parse-line</span>:  <span class="subxComment"># line : (address stream byte), words : (address stream slice)</span>
+<span id="L157" class="LineNr">157 </span>    <span class="subxComment"># pseudocode:</span>
+<span id="L158" class="LineNr">158 </span>    <span class="subxComment">#   var word-slice : (address slice)</span>
+<span id="L159" class="LineNr">159 </span>    <span class="subxComment">#   while true</span>
+<span id="L160" class="LineNr">160 </span>    <span class="subxComment">#     word-slice = next-word-string-or-expression-without-metadata(line)</span>
+<span id="L161" class="LineNr">161 </span>    <span class="subxComment">#     if slice-empty?(word-slice)</span>
+<span id="L162" class="LineNr">162 </span>    <span class="subxComment">#       break                                 # end of line</span>
+<span id="L163" class="LineNr">163 </span>    <span class="subxComment">#     write-int(words, word-slice-&gt;start)</span>
+<span id="L164" class="LineNr">164 </span>    <span class="subxComment">#     write-int(words, word-slice-&gt;end)</span>
+<span id="L165" class="LineNr">165 </span>    <span class="subxComment">#</span>
+<span id="L166" class="LineNr">166 </span>    <span class="subxS1Comment"># . prolog</span>
+<span id="L167" class="LineNr">167 </span>    55/push-ebp
+<span id="L168" class="LineNr">168 </span>    89/&lt;- %ebp 4/r32/esp
+<span id="L169" class="LineNr">169 </span>    <span class="subxS1Comment"># . save registers</span>
+<span id="L170" class="LineNr">170 </span><span class="Constant">$parse-line:end</span>:
+<span id="L171" class="LineNr">171 </span>    <span class="subxS1Comment"># . reclaim locals</span>
+<span id="L172" class="LineNr">172 </span>    <span class="subxS1Comment"># . restore registers</span>
+<span id="L173" class="LineNr">173 </span>    <span class="subxS1Comment"># . epilog</span>
+<span id="L174" class="LineNr">174 </span>    89/&lt;- %esp 5/r32/ebp
+<span id="L175" class="LineNr">175 </span>    5d/pop-to-ebp
+<span id="L176" class="LineNr">176 </span>    c3/return
+<span id="L177" class="LineNr">177 </span>
+<span id="L178" class="LineNr">178 </span><span class="subxFunction">emit-call</span>:  <span class="subxComment"># out : (address buffered-file), words : (address stream slice)</span>
+<span id="L179" class="LineNr">179 </span>    <span class="subxComment"># pseudocode:</span>
+<span id="L180" class="LineNr">180 </span>    <span class="subxComment">#   if (words-&gt;write &lt; 8) abort</span>
+<span id="L181" class="LineNr">181 </span>    <span class="subxComment">#   curr = &amp;words-&gt;data[words-&gt;write-8]</span>
+<span id="L182" class="LineNr">182 </span>    <span class="subxComment">#   min = words-&gt;data</span>
+<span id="L183" class="LineNr">183 </span>    <span class="subxComment">#   # emit pushes</span>
+<span id="L184" class="LineNr">184 </span>    <span class="subxComment">#   while true</span>
+<span id="L185" class="LineNr">185 </span>    <span class="subxComment">#     if (curr &lt;= min) break</span>
+<span id="L186" class="LineNr">186 </span>    <span class="subxComment">#     if (*curr == '%' || *curr == '*')</span>
+<span id="L187" class="LineNr">187 </span>    <span class="subxComment">#       write-buffered(out, &quot;ff 6/subop/push &quot;)</span>
+<span id="L188" class="LineNr">188 </span>    <span class="subxComment">#       write-slice-buffered(out, curr)</span>
+<span id="L189" class="LineNr">189 </span>    <span class="subxComment">#       write-buffered(out, &quot;/imm32\n&quot;)</span>
+<span id="L190" class="LineNr">190 </span>    <span class="subxComment">#     else</span>
+<span id="L191" class="LineNr">191 </span>    <span class="subxComment">#       write-buffered(out, &quot;68/push &quot;)</span>
+<span id="L192" class="LineNr">192 </span>    <span class="subxComment">#       write-slice-buffered(out, curr)</span>
+<span id="L193" class="LineNr">193 </span>    <span class="subxComment">#       write-buffered(out, &quot;/imm32\n&quot;)</span>
+<span id="L194" class="LineNr">194 </span>    <span class="subxComment">#     curr -= 8</span>
+<span id="L195" class="LineNr">195 </span>    <span class="subxComment">#   # emit call</span>
+<span id="L196" class="LineNr">196 </span>    <span class="subxComment">#   write-buffered(out, &quot;e8/call &quot;)</span>
+<span id="L197" class="LineNr">197 </span>    <span class="subxComment">#   write-slice-buffered(out, curr)</span>
+<span id="L198" class="LineNr">198 </span>    <span class="subxComment">#   write-buffered(out, &quot;/disp32\n&quot;)</span>
+<span id="L199" class="LineNr">199 </span>    <span class="subxComment">#   # emit pops</span>
+<span id="L200" class="LineNr">200 </span>    <span class="subxComment">#   write-buffered(out, &quot;81 0/subop/add %esp &quot;)</span>
+<span id="L201" class="LineNr">201 </span>    <span class="subxComment">#   print-int32-buffered(out, words-&gt;write &gt;&gt; 1 - 4)</span>
+<span id="L202" class="LineNr">202 </span>    <span class="subxComment">#   write-buffered(out, &quot;/imm32\n&quot;)</span>
+<span id="L203" class="LineNr">203 </span>    <span class="subxComment">#</span>
+<span id="L204" class="LineNr">204 </span>    <span class="subxS1Comment"># . prolog</span>
+<span id="L205" class="LineNr">205 </span>    55/push-ebp
+<span id="L206" class="LineNr">206 </span>    89/&lt;- %ebp 4/r32/esp
+<span id="L207" class="LineNr">207 </span>    <span class="subxS1Comment"># . save registers</span>
+<span id="L208" class="LineNr">208 </span><span class="Constant">$emit-call:end</span>:
+<span id="L209" class="LineNr">209 </span>    <span class="subxS1Comment"># . reclaim locals</span>
+<span id="L210" class="LineNr">210 </span>    <span class="subxS1Comment"># . restore registers</span>
+<span id="L211" class="LineNr">211 </span>    <span class="subxS1Comment"># . epilog</span>
+<span id="L212" class="LineNr">212 </span>    89/&lt;- %esp  5/r32/ebp
+<span id="L213" class="LineNr">213 </span>    5d/pop-to-ebp
+<span id="L214" class="LineNr">214 </span>    c3/return
+<span id="L215" class="LineNr">215 </span>
+<span id="L216" class="LineNr">216 </span><span class="subxS2Comment"># . . vim&#0058;nowrap:textwidth=0</span>
+</pre>
+</body>
+</html>
+<!-- vim: set foldmethod=manual : -->