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#!/usr/bin/zsh

export ALREADY_FOCUSED=0
tmux list-panes |grep "^1.*active" -q && export ALREADY_FOCUSED=1
if [[ $ALREADY_FOCUSED -eq 0 ]]
then
  tmux select-pane -t 1
fi

tmux send-keys 'F4'

if [[ $ALREADY_FOCUSED -eq 0 ]]
then
  tmux last-pane
fi
generated by cgit-pink 1.4.1-2-gfad0 (git 2.36.2.497.gbbea4dcf42) at 2024-12-04 14:31:36 +0000
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# Translate literal strings within double quotes.
# Replace them with references to new variables in the data segment.
#
# To run (from the subx/ directory):
#   $ ./subx translate *.subx apps/dquote.subx -o apps/dquote
#   $ cat x
#   == code
#   ab "cd ef"/imm32
#   $ cat x  |./subx run apps/dquote
#   == code
#   ab __string1/imm32
#   == data
#   __string1:
#     5/imm32
#     0x63/c 0x64/d 0x20/  0x65/e 0x66/f

== 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

Entry:
    # initialize heap
    # . Heap = new-segment(64KB)
    # . . push args
    68/push  Heap/imm32
    68/push  0x10000/imm32/64KB
    # . . call
    e8/call  new-segment/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP

    # for debugging: run a single test
#?     e8/call  test-convert-processes-string-literals/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 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   5/rm32/EBP    .           .             .           .           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   5/rm32/EBP    .           .             .           .           8/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-and  1/imm32
    75/jump-if-not-equal  $run-main/disp8
    # . run-tests()
    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
    89/copy                         3/mod/direct    0/rm32/EAX    .           .             .           4/r32/ESP   .               .                 # copy ESP to EAX
    # configure ed to really exit()
    # . ed->target = 0
    c7          0/subop/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  Stderr/imm32
    68/push  Stdout/imm32
    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

# conceptual hierarchy within a line:
#   line = words separated by ' ', maybe followed by comment starting with '#'
#   word = datum until '/', then 0 or more metadata separated by '/'

convert:  # in : (address buffered-file), out : (address buffered-file) -> <void>
    # pseudocode:
    #   var line = new-stream(512, 1)
    #   var new-data-segment = new-stream(Heap, Segment-size, 1)
    #   write-stream(new-data-segment, "== data\n")
    #   while true
    #     clear-stream(line)
    #     read-line-buffered(in, line)
    #     if (line->write == 0) break               # end of file
    #     while true
    #       var word-slice = next-word(line)
    #       if slice-empty?(word-slice)             # end of line
    #         break
    #       if slice-starts-with?(word-slice, "#")  # comment
    #         continue
    #       if slice-starts-with?(word-slice, '"')  # string literal <== what we're here for
    #         process-string-literal(word-slice, out, new-data-segment)
    #       else
    #         write-slice-buffered(out, word-slice)
    #       write(out, " ")
    #     write(out, "\n\n")
    #   write-stream-data(out, new-data-segment)
    #   flush(out)
    #
    # . prolog
    55/push-EBP
    89/copy                         3/mod/direct    5/rm32/EBP    .           .             .           4/r32/ESP   .               .                 # copy ESP to EBP
    # . save registers
    50/push-EAX
    51/push-ECX
    52/push-EDX
    53/push-EBX
    56/push-ESI
    57/push-EDI
    # var line/ECX : (address stream byte) = stream(512)
    81          5/subop/subtract    3/mod/direct    4/rm32/ESP    .           .             .           .           .               0x200/imm32       # subtract from ESP
    68/push  0x200/imm32/length
    68/push  0/imm32/read
    68/push  0/imm32/write
    89/copy                         3/mod/direct    1/rm32/ECX    .           .             .           4/r32/ESP   .               .                 # copy ESP to ECX
    # var word-slice/EDX = {0, 0}
    68/push  0/imm32/end
    68/push  0/imm32/curr
    89/copy                         3/mod/direct    2/rm32/EDX    .           .             .           4/r32/ESP   .               .                 # copy ESP to EDX
    # new-data-segment/EDI = new-stream(Heap, Segment-size, 1)
    # . EAX = new-stream(Heap, Segment-size, 1)
    # . . push args
    68/push  1/imm32
    ff          6/subop/push        0/mod/indirect  5/rm32/.disp32            .             .           .           Segment-size/disp32               # push *Segment-size
    68/push  Heap/imm32
    # . . call
    e8/call  new-stream/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               0xc/imm32         # add to ESP
    # . EDI = EAX
    89/copy                         3/mod/direct    7/rm32/EDI    .           .             .           0/r32/EAX   .               .                 # copy EAX to EDI
    # write(new-data-segment, "== data\n")
    # . . push args
    68/push  "== data\n"/imm32
    57/push-EDI
    # . . call
    e8/call  write/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
$convert:line-loop:
    # clear-stream(line)
    # . . 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
    # read-line-buffered(in, line)
    # . . push args
    51/push-ECX
    ff          6/subop/push        1/mod/*+disp8   5/rm32/EBP    .           .             .           .           8/disp8         .                 # push *(EBP+8)
    # . . call
    e8/call  read-line-buffered/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
$convert:check0:
    # if (line->write == 0) break
    81          7/subop/compare     0/mod/indirect  1/rm32/ECX    .           .             .           .           .               0/imm32           # compare *ECX
    0f 84/jump-if-equal  $convert:break/disp32
$convert:word-loop:
    # next-word(line, word-slice)
    # . . push args
    52/push-EDX
    51/push-ECX
    # . . call
    e8/call  next-word/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
$convert:check1:
    # if (slice-empty?(word-slice)) break
    # . EAX = slice-empty?(word-slice)
    # . . push args
    52/push-EDX
    # . . call
    e8/call  slice-empty?/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               4/imm32           # add to ESP
    # . if (EAX != 0) break
    3d/compare-EAX-and  0/imm32
    0f 85/jump-if-not-equal  $convert:next-line/disp32
$convert:check-for-comment:
    # if (slice-starts-with?(word-slice, "#")) continue
    # . start/ESI = word-slice->start
    8b/copy                         0/mod/indirect  2/rm32/EDX    .           .             .           6/r32/ESI   .               .                 # copy *EDX to ESI
    # . c/EAX = *start
    31/xor                          3/mod/direct    0/rm32/EAX    .           .             .           0/r32/EAX   .               .                 # clear EAX
    8a/copy-byte                    0/mod/indirect  6/rm32/ESI    .           .             .           0/r32/AL    .               .                 # copy byte at *ESI to AL
    # . if (EAX == '#') continue
    3d/compare-EAX-and  0x23/imm32/hash
    74/jump-if-equal  $convert:word-loop/disp8
$convert:check-for-string-literal:
    3d/compare-EAX-and  0x22/imm32/hash
    75/jump-if-not-equal  $convert:regular-word/disp8
$convert:string-literal:
    # process-string-literal(word-slice, out, new-data-segment)
    # . . push args
    57/push-EDI
    ff          6/subop/push        1/mod/*+disp8   5/rm32/EBP    .           .             .           .           0xc/disp8       .                 # push *(EBP+12)
    52/push-EDX
    # . . call
    e8/call  process-string-literal/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               0xc/imm32         # add to ESP
    # continue
    eb/jump  $convert:next-word/disp8
$convert:regular-word:
    # write-slice-buffered(out, word-slice)
    # . . push args
    52/push-EDX
    ff          6/subop/push        1/mod/*+disp8   5/rm32/EBP    .           .             .           .           0xc/disp8       .                 # push *(EBP+12)
    # . . call
    e8/call  write-slice-buffered/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
    # fall through
$convert:next-word:
    # write-buffered(out, " ")
    # . . push args
    68/push  " "/imm32
    ff          6/subop/push        1/mod/*+disp8   5/rm32/EBP    .           .             .           .           0xc/disp8       .                 # push *(EBP+12)
    # . . call
    e8/call  write-buffered/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
    # loop
    eb/jump  $convert:word-loop/disp8
$convert:next-line:
    # write-buffered(out, "\n")
    # . . push args
    68/push  Newline/imm32
    ff          6/subop/push        1/mod/*+disp8   5/rm32/EBP    .           .             .           .           0xc/disp8       .                 # push *(EBP+12)
    # . . call
    e8/call  write-buffered/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
    # loop
    e9/jump  $convert:line-loop/disp32
$convert:break:
    # write-stream-data(out, new-data-segment)
    # . . push args
    57/push-EDI
    ff          6/subop/push        1/mod/*+disp8   5/rm32/EBP    .           .             .           .           0xc/disp8       .                 # push *(EBP+12)
    # . . call
    e8/call  write-stream-data/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
    # flush(out)
    # . . push args
    ff          6/subop/push        1/mod/*+disp8   5/rm32/EBP    .           .             .           .           0xc/disp8       .                 # push *(EBP+12)
    # . . call
    e8/call  flush/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               4/imm32           # add to ESP
$convert:end:
    # . reclaim locals
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               0x214/imm32       # add to ESP
    # . restore registers
    5f/pop-to-EDI
    5e/pop-to-ESI
    5b/pop-to-EBX
    5a/pop-to-EDX
    59/pop-to-ECX
    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

# Write out 'string-literal' in a new format to 'out-segment', assign it a new
# label, and write the new label out to 'out'.
process-string-literal:  # string-literal : (address slice), out : (address buffered-file), out-segment : (address stream)
    # pseudocode:
    #   print(out-segment, "_string#{Next-string-literal}:\n")
    #   emit-string-literal-data(out-segment, string-literal)
    #   print(out, "_string#{Next-string-literal}")
    #   emit-metadata(out, string-literal)
    #   ++ *Next-string-literal
    #
    # . prolog
    55/push-EBP
    89/copy                         3/mod/direct    5/rm32/EBP    .           .             .           4/r32/ESP   .               .                 # copy ESP to EBP
    # . save registers
    51/push-ECX
    # var int32-stream/ECX = stream(10)  # number of decimal digits a 32-bit number can have
    81          5/subop/subtract    3/mod/direct    4/rm32/ESP    .           .             .           .           .               0xa/imm32         # subtract from ESP
    68/push  0xa/imm32/decimal-digits-in-32bit-number
    68/push  0/imm32/read
    68/push  0/imm32/write
    89/copy                         3/mod/direct    1/rm32/ECX    .           .             .           4/r32/ESP   .               .                 # copy ESP to ECX
    # print(out-segment, "_string#{Next-string-literal}:\n")
    # . write(out-segment, "_string")
    # . . push args
    68/push  "_string"/imm32
    ff          6/subop/push        1/mod/*+disp8   5/rm32/EBP    .           .             .           .           0x10/disp8      .                 # push *(EBP+16)
    # . . call
    e8/call  write/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
    # . print-int32-decimal(out-segment, *Next-string-literal)
    # . . push args
    ff          6/subop/push        0/mod/indirect  5/rm32/.disp32            .             .           .           Next-string-literal/disp32        # push *Next-string-literal
    ff          6/subop/push        1/mod/*+disp8   5/rm32/EBP    .           .             .           .           0x10/disp8      .                 # push *(EBP+16)
    # . . call
    e8/call  print-int32-decimal/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
    # . write(out-segment, ":\n")
    # . . push args
    68/push  ":\n"/imm32
    ff          6/subop/push        1/mod/*+disp8   5/rm32/EBP    .           .             .           .           0x10/disp8      .                 # push *(EBP+16)
    # . . call
    e8/call  write/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
    # emit-string-literal-data(out-segment, string-literal)
    # . . push args
    ff          6/subop/push        1/mod/*+disp8   5/rm32/EBP    .           .             .           .           0x8/disp8       .                 # push *(EBP+8)
    ff          6/subop/push        1/mod/*+disp8   5/rm32/EBP    .           .             .           .           0x10/disp8      .                 # push *(EBP+16)
    # . . call
    e8/call  emit-string-literal-data/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
    # write(out-segment, "\n")
    # . . push args
    68/push  Newline/imm32
    ff          6/subop/push        1/mod/*+disp8   5/rm32/EBP    .           .             .           .           0x10/disp8      .                 # push *(EBP+16)
    # . . call
    e8/call  write/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
    # print(out, "_string#{Next-string-literal}")
    # . write-buffered(out, "_string")
    # . . push args
    68/push  "_string"/imm32
    ff          6/subop/push        1/mod/*+disp8   5/rm32/EBP    .           .             .           .           0xc/disp8       .                 # push *(EBP+12)
    # . . call
    e8/call  write-buffered/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
    # . print-int32-decimal(int32-stream, *Next-string-literal)
    # . . push args
    ff          6/subop/push        0/mod/indirect  5/rm32/.disp32            .             .           .           Next-string-literal/disp32        # push *Next-string-literal
    51/push-ECX
    # . . call
    e8/call  print-int32-decimal/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
    # . write-stream-data(out, int32-stream)
    # . . push args
    51/push-ECX
    ff          6/subop/push        1/mod/*+disp8   5/rm32/EBP    .           .             .           .           0xc/disp8       .                 # push *(EBP+12)
    # . . call
    e8/call  write-stream-data/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
    # emit-metadata(out, string-literal)
    # . . push args
    ff          6/subop/push        1/mod/*+disp8   5/rm32/EBP    .           .             .           .           8/disp8         .                 # push *(EBP+8)
    ff          6/subop/push        1/mod/*+disp8   5/rm32/EBP    .           .             .           .           0xc/disp8       .                 # push *(EBP+12)
    # . . call
    e8/call  emit-metadata/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
    # ++ *Next-string-literal
    ff          0/subop/increment   0/mod/indirect  5/rm32/.disp32            .             .           .           Next-string-literal/disp32        # increment *Num-test-failures
$process-string-literal:end:
    # . reclaim locals
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               0x16/imm32        # add to ESP
    # . 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-convert-is-idempotent-by-default:
    # . prolog
    55/push-EBP
    89/copy                         3/mod/direct    5/rm32/EBP    .           .             .           4/r32/ESP   .               .                 # copy ESP to EBP
    # setup
    # . clear-stream(_test-input-stream)
    # . . push args
    68/push  _test-input-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-input-buffered-file+4)
    # . . push args
    b8/copy-to-EAX  _test-input-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
    # . clear-stream(_test-output-stream)
    # . . push args
    68/push  _test-output-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-output-buffered-file+4)
    # . . push args
    b8/copy-to-EAX  _test-output-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 input (meta comments in parens)
    #   # comment 1
    #     # comment 2 indented
    #   == code  (new segment)
    #   # comment 3 inside a segment
    #   1
    #                         (empty line)
    #   2 3 # comment 4 inline with other contents
    #   == data  (new segment)
    #   4 5/imm32
    # . write(_test-input-stream, "# comment 1\n")
    # . . push args
    68/push  "# comment 1\n"/imm32
    68/push  _test-input-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-input-stream, "  # comment 2 indented\n")
    # . . push args
    68/push  "  # comment 2 indented\n"/imm32
    68/push  _test-input-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-input-stream, "== code\n")
    # . . push args
    68/push  "== code\n"/imm32
    68/push  _test-input-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-input-stream, "# comment 3 inside a segment\n")
    # . . push args
    68/push  "# comment 3 inside a segment\n"/imm32
    68/push  _test-input-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-input-stream, "1\n")
    # . . push args
    68/push  "1\n"/imm32
    68/push  _test-input-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-input-stream, "\n")  # empty line
    # . . push args
    68/push  "\n"/imm32
    68/push  _test-input-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-input-stream, "2 3 # comment 4 inline with other contents\n")
    # . . push args
    68/push  "2 3 # comment 4 inline with other contents\n"/imm32
    68/push  _test-input-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-input-stream, "== data\n")
    # . . push args
    68/push  "== data\n"/imm32
    68/push  _test-input-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-input-stream, "4 5/imm32\n")
    # . . push args
    68/push  "4 5/imm32\n"/imm32
    68/push  _test-input-stream/imm32
    # . . call
    e8/call  write/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
    # convert(_test-input-buffered-file, _test-output-buffered-file)
    # . . push args
    68/push  _test-output-buffered-file/imm32
    68/push  _test-input-buffered-file/imm32
    # . . call
    e8/call  convert/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
    # . flush(_test-output-buffered-file)
    # . . push args
    68/push  _test-output-buffered-file/imm32
    # . . call
    e8/call  flush/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               4/imm32           # add to ESP
    # check output
    #     (comment dropped for now)
    #     (comment dropped for now)
    #   == code
    #     (comment dropped for now)
    #   1
    #     (comment dropped for now)
    #   2 3
    #   == data
    #   4 5/imm32
    # We don't care right now what exactly happens to comments. Trailing spaces are also minor details.
#?     # dump output {{{
#?     # . write(2/stderr, "result: ^")
#?     # . . push args
#?     68/push  "result: ^"/imm32
#?     68/push  2/imm32/stderr
#?     # . . call
#?     e8/call  write/disp32
#?     # . . discard args
#?     81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
#?     # . write-stream(2/stderr, _test-output-stream)
#?     # . . push args
#?     68/push  _test-output-stream/imm32
#?     68/push  2/imm32/stderr
#?     # . . call
#?     e8/call  write-stream/disp32
#?     # . . discard args
#?     81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
#?     # . write(2/stderr, "$\n")
#?     # . . push args
#?     68/push  "$\n"/imm32
#?     68/push  2/imm32/stderr
#?     # . . call
#?     e8/call  write/disp32
#?     # . . discard args
#?     81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
#?     # }}}
    # . check-next-stream-line-equal(_test-output-stream, "", msg)
    # . . push args
    68/push  "F - test-convert-is-idempotent-by-default/0"/imm32
    68/push  ""/imm32
    68/push  _test-output-stream/imm32
    # . . call
    e8/call  check-next-stream-line-equal/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               0xc/imm32         # add to ESP
    # . check-next-stream-line-equal(_test-output-stream, "", msg)
    # . . push args
    68/push  "F - test-convert-is-idempotent-by-default/1"/imm32
    68/push  ""/imm32
    68/push  _test-output-stream/imm32
    # . . call
    e8/call  check-next-stream-line-equal/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               0xc/imm32         # add to ESP
    # . check-next-stream-line-equal(_test-output-stream, "== code ", msg)
    # . . push args
    68/push  "F - test-convert-is-idempotent-by-default/2"/imm32
    68/push  "== code "/imm32
    68/push  _test-output-stream/imm32
    # . . call
    e8/call  check-next-stream-line-equal/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               0xc/imm32         # add to ESP
    # . check-next-stream-line-equal(_test-output-stream, "", msg)
    # . . push args
    68/push  "F - test-convert-is-idempotent-by-default/3"/imm32
    68/push  ""/imm32
    68/push  _test-output-stream/imm32
    # . . call
    e8/call  check-next-stream-line-equal/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               0xc/imm32         # add to ESP
    # . check-next-stream-line-equal(_test-output-stream, "1 ", msg)
    # . . push args
    68/push  "F - test-convert-is-idempotent-by-default/4"/imm32
    68/push  "1 "/imm32
    68/push  _test-output-stream/imm32
    # . . call
    e8/call  check-next-stream-line-equal/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               0xc/imm32         # add to ESP
    # . check-next-stream-line-equal(_test-output-stream, "", msg)
    # . . push args
    68/push  "F - test-convert-is-idempotent-by-default/5"/imm32
    68/push  ""/imm32
    68/push  _test-output-stream/imm32
    # . . call
    e8/call  check-next-stream-line-equal/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               0xc/imm32         # add to ESP
    # . check-next-stream-line-equal(_test-output-stream, "2 3 ", msg)
    # . . push args
    68/push  "F - test-convert-is-idempotent-by-default/6"/imm32
    68/push  "2 3 "/imm32
    68/push  _test-output-stream/imm32
    # . . call
    e8/call  check-next-stream-line-equal/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               0xc/imm32         # add to ESP
    # . check-next-stream-line-equal(_test-output-stream, "== data ", msg)
    # . . push args
    68/push  "F - test-convert-is-idempotent-by-default/7"/imm32
    68/push  "== data "/imm32
    68/push  _test-output-stream/imm32
    # . . call
    e8/call  check-next-stream-line-equal/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               0xc/imm32         # add to ESP
    # . check-next-stream-line-equal(_test-output-stream, "4 5/imm32 ", msg)
    # . . push args
    68/push  "F - test-convert-is-idempotent-by-default/8"/imm32
    68/push  "4 5/imm32 "/imm32
    68/push  _test-output-stream/imm32
    # . . call
    e8/call  check-next-stream-line-equal/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               0xc/imm32         # add to ESP
    # . epilog
    89/copy                         3/mod/direct    4/rm32/ESP    .           .             .           5/r32/EBP   .               .                 # copy EBP to ESP
    5d/pop-to-EBP
    c3/return

test-convert-processes-string-literals:
    # . prolog
    55/push-EBP
    89/copy                         3/mod/direct    5/rm32/EBP    .           .             .           4/r32/ESP   .               .                 # copy ESP to EBP
    # setup
    # . clear-stream(_test-input-stream)
    # . . push args
    68/push  _test-input-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-input-buffered-file+4)
    # . . push args
    b8/copy-to-EAX  _test-input-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
    # . clear-stream(_test-output-stream)
    # . . push args
    68/push  _test-output-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-output-buffered-file+4)
    # . . push args
    b8/copy-to-EAX  _test-output-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 input (meta comments in parens)
    #   == code  (new segment)
    #   1 "a"/x
    #   2 "bc"/y
    68/push  "== code\n"/imm32
    68/push  _test-input-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-input-stream, "1 \"a\"/x\n")
    # . . push args
    68/push  "1 \"a\"/x\n"/imm32
    68/push  _test-input-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-input-stream, "2 \"bc\"/y\n")
    # . . push args
    68/push  "2 \"bc\"/y\n"/imm32
    68/push  _test-input-stream/imm32
    # . . call
    e8/call  write/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
    # convert(_test-input-buffered-file, _test-output-buffered-file)
    # . . push args
    68/push  _test-output-buffered-file/imm32
    68/push  _test-input-buffered-file/imm32
    # . . call
    e8/call  convert/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
    # . flush(_test-output-buffered-file)
    # . . push args
    68/push  _test-output-buffered-file/imm32
    # . . call
    e8/call  flush/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               4/imm32           # add to ESP
    # check output
    #   == code
    #   1 _string1/x
    #   2 _string2/y
    #   == data
    #   _string1:
    #   1/imm32 61/a
    #   _string2:
    #   2/imm32 62/b 63/c
    # We don't care right now what exactly happens to comments. Trailing spaces are also minor details.
    #
    # Open question: how to make this check more robust.
    # We don't actually care what the auto-generated string variables are
    # called. We just want to make sure instructions using string literals
    # switch to a string variable with the right value.
    # (Modifying string literals completely off the radar for now.)
    # dump output {{{
    # . write(2/stderr, "result: ^")
    # . . push args
    68/push  "result: ^"/imm32
    68/push  2/imm32/stderr
    # . . call
    e8/call  write/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
    # . write-stream(2/stderr, _test-output-stream)
    # . . push args
    68/push  _test-output-stream/imm32
    68/push  2/imm32/stderr
    # . . call
    e8/call  write-stream/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
    # . write(2/stderr, "$\n")
    # . . push args
    68/push  "$\n"/imm32
    68/push  2/imm32/stderr
    # . . call
    e8/call  write/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
    # . rewind-stream(_test-output-stream)
    # . . push args
    68/push  _test-output-stream/imm32
    # . . call
    e8/call  rewind-stream/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               4/imm32           # add to ESP
    # }}}
    # . check-next-stream-line-equal(_test-output-stream, "== code ", msg)
    # . . push args
    68/push  "F - test-convert-processes-string-literals/0"/imm32
    68/push  "== code "/imm32
    68/push  _test-output-stream/imm32
    # . . call
    e8/call  check-next-stream-line-equal/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               0xc/imm32         # add to ESP
    # . check-next-stream-line-equal(_test-output-stream, "1 _string1/x ", msg)
    # . . push args
    68/push  "F - test-convert-processes-string-literals/1"/imm32
    68/push  "1 _string1/x "/imm32
    68/push  _test-output-stream/imm32
    # . . call
    e8/call  check-next-stream-line-equal/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               0xc/imm32         # add to ESP
    # . check-next-stream-line-equal(_test-output-stream, "2 _string2/y ", msg)
    # . . push args
    68/push  "F - test-convert-processes-string-literals/2"/imm32
    68/push  "2 _string2/y "/imm32
    68/push  _test-output-stream/imm32
    # . . call
    e8/call  check-next-stream-line-equal/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               0xc/imm32         # add to ESP
    # . check-next-stream-line-equal(_test-output-stream, "== data", msg)
    # . . push args
    68/push  "F - test-convert-processes-string-literals/3"/imm32
    68/push  "== data"/imm32
    68/push  _test-output-stream/imm32
    # . . call
    e8/call  check-next-stream-line-equal/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               0xc/imm32         # add to ESP
    # . check-next-stream-line-equal(_test-output-stream, "_string1: ", msg)
    # . . push args
    68/push  "F - test-convert-processes-string-literals/4"/imm32
    68/push  "_string1:"/imm32
    68/push  _test-output-stream/imm32
    # . . call
    e8/call  check-next-stream-line-equal/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               0xc/imm32         # add to ESP
    # . check-next-stream-line-equal(_test-output-stream, "1/imm32 61/a ", msg)
    # . . push args
    68/push  "F - test-convert-processes-string-literals/5"/imm32
    68/push  "0x00000001/imm32 61/a "/imm32
    68/push  _test-output-stream/imm32
    # . . call
    e8/call  check-next-stream-line-equal/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               0xc/imm32         # add to ESP
    # . check-next-stream-line-equal(_test-output-stream, "_string2: ", msg)
    # . . push args
    68/push  "F - test-convert-processes-string-literals/6"/imm32
    68/push  "_string2:"/imm32
    68/push  _test-output-stream/imm32
    # . . call
    e8/call  check-next-stream-line-equal/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               0xc/imm32         # add to ESP
    # . check-next-stream-line-equal(_test-output-stream, "2/imm32 62/b 63/c ", msg)
    # . . push args
    68/push  "F - test-convert-processes-string-literals/7"/imm32
    68/push  "0x00000002/imm32 62/b 63/c "/imm32
    68/push  _test-output-stream/imm32
    # . . call
    e8/call  check-next-stream-line-equal/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               0xc/imm32         # add to ESP
    # . epilog
    89/copy                         3/mod/direct    4/rm32/ESP    .           .             .           5/r32/EBP   .               .                 # copy EBP to ESP
    5d/pop-to-EBP
    c3/return

# generate the data segment contents byte by byte for a given slice
emit-string-literal-data:  # out : (address stream), word : (address slice)
    # pseudocode
    #   var len = word->end - word->start - 2  # ignore the double-quotes
    #   append-int32-hex(out, len)
    #   write(out, "/imm32")
    #   curr = word->start
    #   ++curr  # skip '"'
    #   while true
    #     if (curr >= word->end) break
    #     c = *curr
    #     if (c == '"') break
    #     append-byte-hex(out, c)
    #     if c is alphanumeric:
    #       write(out, "/")
    #       append-byte(out, c)
    #     write(out, " ")
    #     ++curr
    #
    # . prolog
    55/push-EBP
    89/copy                         3/mod/direct    5/rm32/EBP    .           .             .           4/r32/ESP   .               .                 # copy ESP to EBP
    # . save registers
    50/push-EAX
    51/push-ECX
    52/push-EDX
    56/push-ESI
    # ESI = word
    8b/copy                         1/mod/*+disp8   5/rm32/EBP    .           .             .           6/r32/ESI   0xc/disp8       .                 # copy *(EBP+12) to ESI
    # curr/EDX = word->start
    8b/copy                         0/mod/indirect  6/rm32/ESI    .           .             .           2/r32/EDX   .               .                 # copy *ESI to EDX
$emit-string-literal-data:emit-length:
    # TODO: handle metadata here
    # print(out, "#{len}/imm32 ")
    # . len/ECX = word->end - word->start - 2
    8b/copy                         1/mod/*+disp8   6/rm32/ESI    .           .             .           1/r32/ECX   4/disp8         .                 # copy *(ESI+4) to ECX
    29/subtract                     3/mod/direct    1/rm32/ECX    .           .             .           2/r32/EDX   .               .                 # subtract EDX from ECX
    81          5/subop/subtract    3/mod/direct    1/rm32/ECX    .           .             .           .           .               2/imm32           # subtract from ECX
    # . print-int32(out, len)
    # . . push args
    51/push-ECX
    ff          6/subop/push        1/mod/*+disp8   5/rm32/EBP    .           .             .           .           8/disp8         .                 # push *(EBP+8)
    # . . call
    e8/call  print-int32/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
    # . write(out, "/imm32 ")
    # . . push args
    68/push  "/imm32 "/imm32
    ff          6/subop/push        1/mod/*+disp8   5/rm32/EBP    .           .             .           .           8/disp8         .                 # push *(EBP+8)
    # . . call
    e8/call  write/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
$emit-string-literal-data:loop-init:
    # ++curr  # skip initial '"'
    42/increment-EDX
    # max/ESI = word->end
    8b/copy                         1/mod/*+disp8   6/rm32/ESI    .           .             .           6/r32/ESI   4/disp8         .                 # copy *(ESI+4) to ESI
    # ECX = 0
    31/xor                          3/mod/direct    1/rm32/ECX    .           .             .           1/r32/ECX   .               .                 # clear ECX
$emit-string-literal-data:loop:
    # if (curr >= max) break
    39/compare                      3/mod/direct    2/rm32/EDX    .           .             .           6/r32/ESI   .               .                 # compare EDX with ESI
    7d/jump-if-greater-or-equal  $emit-string-literal-data:end/disp8
    # CL = *curr
    8a/copy-byte                    0/mod/indirect  2/rm32/EDX    .           .             .           1/r32/CL    .               .                 # copy byte at *EDX to CL
    # if (ECX == '"') break
    81          7/subop/compare     3/mod/direct    1/rm32/ECX    .           .             .           .           .               0x22/imm32/dquote # compare ECX
    74/jump-if-equal  $emit-string-literal-data:end/disp8
    # append-byte-hex(out, CL)
    # . . push args
    51/push-ECX
    ff          6/subop/push        1/mod/*+disp8   5/rm32/EBP    .           .             .           .           8/disp8         .                 # push *(EBP+8)
    # . . call
    e8/call  append-byte-hex/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
    # if (is-alphanumeric?(*curr)) print(out, "/#{*curr}")
    # . EAX = is-alphanumeric?(CL)
    # . . push args
    51/push-ECX
    # . . call
    e8/call  is-alphanumeric?/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               4/imm32           # add to ESP
    # . if (EAX == 0) goto char-done
    3d/compare-EAX-and  0/imm32
    74/jump-if-equal  $emit-string-literal-data:char-done/disp8
    # . write(out, "/")
    # . . push args
    68/push  Slash/imm32
    ff          6/subop/push        1/mod/*+disp8   5/rm32/EBP    .           .             .           .           8/disp8         .                 # push *(EBP+8)
    # . . call
    e8/call  write/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
    # . append-byte(out, *curr)
    # . . push args
    51/push-ECX
    ff          6/subop/push        1/mod/*+disp8   5/rm32/EBP    .           .             .           .           8/disp8         .                 # push *(EBP+8)
    # . . call
    e8/call  append-byte/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
$emit-string-literal-data:char-done:
    # write(out, " ")
    # . . push args
    68/push  Space/imm32
    ff          6/subop/push        1/mod/*+disp8   5/rm32/EBP    .           .             .           .           8/disp8         .                 # push *(EBP+8)
    # . . call
    e8/call  write/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
    # ++curr
    42/increment-EDX
    eb/jump $emit-string-literal-data:loop/disp8
$emit-string-literal-data:end:
    # . restore registers
    5e/pop-to-ESI
    5a/pop-to-EDX
    59/pop-to-ECX
    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

is-alphanumeric?:  # c : int -> EAX : boolean
    # . prolog
    55/push-EBP
    89/copy                         3/mod/direct    5/rm32/EBP    .           .             .           4/r32/ESP   .               .                 # copy ESP to EBP
    # EAX = c
    8b/copy                         1/mod/*+disp8   5/rm32/EBP    .           .             .           0/r32/EAX   8/disp8         .                 # copy *(EBP+8) to EAX
    # if (EAX < '0') return false
    3d/compare-EAX-with  0x30/imm32/0
    7c/jump-if-lesser  $is-alphanumeric?:false/disp8
    # if (EAX <= '9') return true
    3d/compare-EAX-with  0x39/imm32/9
    7e/jump-if-lesser-or-equal  $is-alphanumeric?:true/disp8
    # if (EAX < 'A') return false
    3d/compare-EAX-with  0x41/imm32/A
    7c/jump-if-lesser  $is-alphanumeric?:false/disp8
    # if (EAX <= 'Z') return true
    3d/compare-EAX-with  0x5a/imm32/Z
    7e/jump-if-lesser-or-equal  $is-alphanumeric?:true/disp8
    # if (EAX < 'a') return false
    3d/compare-EAX-with  0x61/imm32/a
    7c/jump-if-lesser  $is-alphanumeric?:false/disp8
    # if (EAX <= 'z') return true
    3d/compare-EAX-with  0x7a/imm32/z
    7e/jump-if-lesser-or-equal  $is-alphanumeric?:true/disp8
    # return false
$is-alphanumeric?:false:
    b8/copy-to-EAX  0/imm32/false
    eb/jump  $is-alphanumeric?:end/disp8
$is-alphanumeric?:true:
    b8/copy-to-EAX  1/imm32/true
$is-alphanumeric?:end:
    # . epilog
    89/copy                         3/mod/direct    4/rm32/ESP    .           .             .           5/r32/EBP   .               .                 # copy EBP to ESP
    5d/pop-to-EBP
    c3/return

test-emit-string-literal-data:
    # . prolog
    55/push-EBP
    89/copy                         3/mod/direct    5/rm32/EBP    .           .             .           4/r32/ESP   .               .                 # copy ESP to EBP
    # setup
    # . clear-stream(_test-output-stream)
    # . . push args
    68/push  _test-output-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
    # var slice/ECX = '"abc"'
    68/push  _test-slice-abc-end/imm32
    68/push  _test-slice-abc/imm32
    89/copy                         3/mod/direct    1/rm32/ECX    .           .             .           4/r32/ESP   .               .                 # copy ESP to ECX
    # emit-string-literal-data(_test-output-stream, slice)
    # . . push args
    51/push-ECX
    68/push  _test-output-stream/imm32
    # . . call
    e8/call  emit-string-literal-data/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
#?     # dump output {{{
#?     # . write(2/stderr, "result: ^")
#?     # . . push args
#?     68/push  "result: ^"/imm32
#?     68/push  2/imm32/stderr
#?     # . . call
#?     e8/call  write/disp32
#?     # . . discard args
#?     81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
#?     # . write-stream(2/stderr, _test-output-stream)
#?     # . . push args
#?     68/push  _test-output-stream/imm32
#?     68/push  2/imm32/stderr
#?     # . . call
#?     e8/call  write-stream/disp32
#?     # . . discard args
#?     81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
#?     # . write(2/stderr, "$\n")
#?     # . . push args
#?     68/push  "$\n"/imm32
#?     68/push  2/imm32/stderr
#?     # . . call
#?     e8/call  write/disp32
#?     # . . discard args
#?     81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
#?     # }}}
    # . check-stream-equal(_test-output-stream, "3/imm32 61/a 62/b 63/c ", msg)
    # . . push args
    68/push  "F - test-emit-string-literal-data"/imm32
    68/push  "0x00000003/imm32 61/a 62/b 63/c "/imm32
    68/push  _test-output-stream/imm32
    # . . call
    e8/call  check-stream-equal/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               0xc/imm32         # add to ESP
    # . epilog
    89/copy                         3/mod/direct    4/rm32/ESP    .           .             .           5/r32/EBP   .               .                 # copy EBP to ESP
    5d/pop-to-EBP
    c3/return

test-emit-string-literal-data-empty:
    # . prolog
    55/push-EBP
    89/copy                         3/mod/direct    5/rm32/EBP    .           .             .           4/r32/ESP   .               .                 # copy ESP to EBP
    # setup
    # . clear-stream(_test-output-stream)
    # . . push args
    68/push  _test-output-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
    # var slice/ECX = '""'
    68/push  _test-slice-empty-string-literal-end/imm32
    68/push  _test-slice-empty-string-literal/imm32
    89/copy                         3/mod/direct    1/rm32/ECX    .           .             .           4/r32/ESP   .               .                 # copy ESP to ECX
    # emit-string-literal-data(_test-output-stream, slice)
    # . . push args
    51/push-ECX
    68/push  _test-output-stream/imm32
    # . . call
    e8/call  emit-string-literal-data/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
#?     # dump output {{{
#?     # . write(2/stderr, "result: ^")
#?     # . . push args
#?     68/push  "result: ^"/imm32
#?     68/push  2/imm32/stderr
#?     # . . call
#?     e8/call  write/disp32
#?     # . . discard args
#?     81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
#?     # . write-stream(2/stderr, _test-output-stream)
#?     # . . push args
#?     68/push  _test-output-stream/imm32
#?     68/push  2/imm32/stderr
#?     # . . call
#?     e8/call  write-stream/disp32
#?     # . . discard args
#?     81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
#?     # . write(2/stderr, "$\n")
#?     # . . push args
#?     68/push  "$\n"/imm32
#?     68/push  2/imm32/stderr
#?     # . . call
#?     e8/call  write/disp32
#?     # . . discard args
#?     81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
#?     # }}}
    # . check-stream-equal(_test-output-stream, "0/imm32 ", msg)
    # . . push args
    68/push  "F - test-emit-string-literal-data-empty"/imm32
    68/push  "0x00000000/imm32 "/imm32
    68/push  _test-output-stream/imm32
    # . . call
    e8/call  check-stream-equal/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               0xc/imm32         # add to ESP
    # . epilog
    89/copy                         3/mod/direct    4/rm32/ESP    .           .             .           5/r32/EBP   .               .                 # copy EBP to ESP
    5d/pop-to-EBP
    c3/return

# just to keep things simple
test-emit-string-literal-data-no-metadata-for-non-alphanumerics:
    # . prolog
    55/push-EBP
    89/copy                         3/mod/direct    5/rm32/EBP    .           .             .           4/r32/ESP   .               .                 # copy ESP to EBP
    # setup
    # . clear-stream(_test-output-stream)
    # . . push args
    68/push  _test-output-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
    # var slice/ECX = '"a b"'
    68/push  _test-slice-a-space-b-end/imm32
    68/push  _test-slice-a-space-b/imm32
    89/copy                         3/mod/direct    1/rm32/ECX    .           .             .           4/r32/ESP   .               .                 # copy ESP to ECX
    # emit-string-literal-data(_test-output-stream, slice)
    # . . push args
    51/push-ECX
    68/push  _test-output-stream/imm32
    # . . call
    e8/call  emit-string-literal-data/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
#?     # dump output {{{
#?     # . write(2/stderr, "result: ^")
#?     # . . push args
#?     68/push  "result: ^"/imm32
#?     68/push  2/imm32/stderr
#?     # . . call
#?     e8/call  write/disp32
#?     # . . discard args
#?     81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
#?     # . write-stream(2/stderr, _test-output-stream)
#?     # . . push args
#?     68/push  _test-output-stream/imm32
#?     68/push  2/imm32/stderr
#?     # . . call
#?     e8/call  write-stream/disp32
#?     # . . discard args
#?     81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
#?     # . write(2/stderr, "$\n")
#?     # . . push args
#?     68/push  "$\n"/imm32
#?     68/push  2/imm32/stderr
#?     # . . call
#?     e8/call  write/disp32
#?     # . . discard args
#?     81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
#?     # }}}
    # . check-stream-equal(_test-output-stream, "3/imm32 61/a 20 62/b ", msg)  # ideally we'd like to say '20/space' but that requires managing names for codepoints
    # . . push args
    68/push  "F - test-emit-string-literal-data-no-metadata-for-non-alphanumerics"/imm32
    68/push  "0x00000003/imm32 61/a 20 62/b "/imm32
    68/push  _test-output-stream/imm32
    # . . call
    e8/call  check-stream-equal/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               0xc/imm32         # add to ESP
    # . epilog
    89/copy                         3/mod/direct    4/rm32/ESP    .           .             .           5/r32/EBP   .               .                 # copy EBP to ESP
    5d/pop-to-EBP
    c3/return

test-emit-string-literal-data-handles-escape-sequences:
    # . prolog
    55/push-EBP
    89/copy                         3/mod/direct    5/rm32/EBP    .           .             .           4/r32/ESP   .               .                 # copy ESP to EBP
    # setup
    # . clear-stream(_test-output-stream)
    # . . push args
    68/push  _test-output-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
    # var slice/ECX = '"a\"b"'
    68/push  _test-slice-a-dquote-b-end/imm32
    68/push  _test-slice-a-dquote-b/imm32
    89/copy                         3/mod/direct    1/rm32/ECX    .           .             .           4/r32/ESP   .               .                 # copy ESP to ECX
    # emit-string-literal-data(_test-output-stream, slice)
    # . . push args
    51/push-ECX
    68/push  _test-output-stream/imm32
    # . . call
    e8/call  emit-string-literal-data/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
#?     # dump output {{{
#?     # . write(2/stderr, "result: ^")
#?     # . . push args
#?     68/push  "result: ^"/imm32
#?     68/push  2/imm32/stderr
#?     # . . call
#?     e8/call  write/disp32
#?     # . . discard args
#?     81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
#?     # . write-stream(2/stderr, _test-output-stream)
#?     # . . push args
#?     68/push  _test-output-stream/imm32
#?     68/push  2/imm32/stderr
#?     # . . call
#?     e8/call  write-stream/disp32
#?     # . . discard args
#?     81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
#?     # . write(2/stderr, "$\n")
#?     # . . push args
#?     68/push  "$\n"/imm32
#?     68/push  2/imm32/stderr
#?     # . . call
#?     e8/call  write/disp32
#?     # . . discard args
#?     81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
#?     # }}}
    # . check-stream-equal(_test-output-stream, "3/imm32 61/a 22 62/b ", msg)
    # . . push args
    68/push  "F - test-emit-string-literal-data-handles-escape-sequences"/imm32
    68/push  "3/imm32 61/a 22 62/b "/imm32
    68/push  _test-output-stream/imm32
    # . . call
    e8/call  check-stream-equal/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               0xc/imm32         # add to ESP
    # . epilog
    89/copy                         3/mod/direct    4/rm32/ESP    .           .             .           5/r32/EBP   .               .                 # copy EBP to ESP
    5d/pop-to-EBP
    c3/return

# emit everything from a word except the initial datum
emit-metadata:  # out : (address buffered-file), word : (address slice)
    # . prolog
    55/push-EBP
    89/copy                         3/mod/direct    5/rm32/EBP    .           .             .           4/r32/ESP   .               .                 # copy ESP to EBP
    # . save registers
    50/push-EAX
    51/push-ECX
    52/push-EDX

    # PSEUDOCODE
    # ECX = (char *) word->start
    # while true:
    #   if ECX == word->end: return
    #   if *(ECX++) == '/': break
    # write-slice-buffered(out, {ECX, word->end})

    # ECX = word
    8b/copy/word                    1/mod/*+disp8   5/rm32/EBP    .           .             .           1/r32/ECX   0xc/disp8       .                 # copy *(EBP+12) to ECX
    # EDX = word->end
    8b/copy/word->end               1/mod/*+disp8   1/rm32/ECX    .           .             .           2/r32/EDX   4/disp8         .                 # copy *(ECX+4) to EDX
    # ECX = word->start
    8b/copy/word->start             0/mod/indirect  1/rm32/ECX    .           .             .           1/r32/ECX   .               .                 # copy *ECX to ECX

    # clear out EAX
    b8/copy-to-EAX 0/imm32
    # while *start != '/':
$skip-datum-loop:
    # . start == end?
    39/compare-ECX-and              3/mod/direct    2/rm32/EDX    .           .             .           1/r32/ECX   .               .                 # EDX == ECX
    # . if so, return from function (it's only datum, or empty)
    74/jump-if-equal  $emit-metadata:end/disp8

    # . start++
    41/increment-ECX                                                                                                                                  # ECX++

    # . EAX = *start
    8a/copy-byte                    0/mod/indirect  1/rm32/ECX    .           .             .           0/r32/EAX   .               .                 # copy *ECX to EAX

    # . EAX != '/'?
    3d/compare-EAX-and  0x2f/imm32
    # . if so, continue looping
    75/jump-if-not-equal  $skip-datum-loop/disp8
    # end

    # write-slice-buffered(out, &{start, end})
    # . push end
    52/push-EDX
    # . push start
    51/push-ECX
    # . push &{start, end}
    54/push-ESP

    # . push out
    ff          6/subop/push        1/mod/*+disp8   5/rm32/EBP    .           .             .           .           8/disp8         .                 # push *(EBP+8)

    e8/call  write-slice-buffered/disp32
    # . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           0x10/imm32      .                 # add 16 to ESP

$emit-metadata:end:
    # . restore registers
    5a/pop-to-EDX
    59/pop-to-ECX
    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-emit-metadata:
    # . prolog
    55/push-EBP
    89/copy                         3/mod/direct    5/rm32/EBP    .           .             .           4/r32/ESP   .               .                 # copy ESP to EBP
    # setup
    # . clear-stream(_test-output-stream)
    # . . push args
    68/push  _test-output-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-output-buffered-file+4)
    # . . push args
    b8/copy-to-EAX  _test-output-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
    # var slice/ECX = "abc/def"
    68/push  _test-slice-word-end/imm32
    68/push  _test-slice-word/imm32/start
    89/copy                         3/mod/direct    1/rm32/ECX    .           .             .           4/r32/ESP   .               .                 # copy ESP to ECX
    # emit-metadata(_test-output-buffered-file, slice)
    # . . push args
    51/push-ECX
    68/push  _test-output-buffered-file/imm32
    # . . call
    e8/call  emit-metadata/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
    # flush(_test-output-buffered-file)
    # . . push args
    68/push  _test-output-buffered-file/imm32
    # . . call
    e8/call  flush/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               4/imm32           # add to ESP
    # check-stream-equal(_test-output-stream, "/def", msg)  # important that there's no leading space
    # . . push args
    68/push  "F - test-emit-metadata"/imm32
    68/push  "/def"/imm32
    68/push  _test-output-stream/imm32
    # . . call
    e8/call  check-stream-equal/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               0xc/imm32         # add to ESP
    # . epilog
    89/copy                         3/mod/direct    4/rm32/ESP    .           .             .           5/r32/EBP   .               .                 # copy EBP to ESP
    5d/pop-to-EBP
    c3/return

test-emit-metadata-none:
    # . prolog
    55/push-EBP
    89/copy                         3/mod/direct    5/rm32/EBP    .           .             .           4/r32/ESP   .               .                 # copy ESP to EBP
    # setup
    # . clear-stream(_test-output-stream)
    # . . push args
    68/push  _test-output-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-output-buffered-file+4)
    # . . push args
    b8/copy-to-EAX  _test-output-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
    # var slice/ECX = "abc"
    68/push  _test-slice-word-datum-end/imm32
    68/push  _test-slice-word/imm32/start
    89/copy                         3/mod/direct    1/rm32/ECX    .           .             .           4/r32/ESP   .               .                 # copy ESP to ECX
    # emit-metadata(_test-output-buffered-file, slice)
    # . . push args
    51/push-ECX
    68/push  _test-output-buffered-file/imm32
    # . . call
    e8/call  emit-metadata/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
    # flush(_test-output-buffered-file)
    # . . push args
    68/push  _test-output-buffered-file/imm32
    # . . call
    e8/call  flush/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               4/imm32           # add to ESP
    # check-stream-equal(_test-output-stream, "", msg)
    # . . push args
    68/push  "F - test-emit-metadata-none"/imm32
    68/push  ""/imm32
    68/push  _test-output-stream/imm32
    # . . call
    e8/call  check-stream-equal/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               0xc/imm32         # add to ESP
    # . epilog
    89/copy                         3/mod/direct    4/rm32/ESP    .           .             .           5/r32/EBP   .               .                 # copy EBP to ESP
    5d/pop-to-EBP
    c3/return

test-emit-metadata-multiple:
    # . prolog
    55/push-EBP
    89/copy                         3/mod/direct    5/rm32/EBP    .           .             .           4/r32/ESP   .               .                 # copy ESP to EBP
    # setup
    # . clear-stream(_test-output-stream)
    # . . push args
    68/push  _test-output-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-output-buffered-file+4)
    # . . push args
    b8/copy-to-EAX  _test-output-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
    # var slice/ECX = "abc/def/ghi"
    68/push  _test-slice-word-end2/imm32
    68/push  _test-slice-word/imm32/start
    89/copy                         3/mod/direct    1/rm32/ECX    .           .             .           4/r32/ESP   .               .                 # copy ESP to ECX
    # emit-metadata(_test-output-buffered-file, slice)
    # . . push args
    51/push-ECX
    68/push  _test-output-buffered-file/imm32
    # . . call
    e8/call  emit-metadata/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
    # flush(_test-output-buffered-file)
    # . . push args
    68/push  _test-output-buffered-file/imm32
    # . . call
    e8/call  flush/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               4/imm32           # add to ESP
    # check-stream-equal(_test-output-stream, "/def/ghi", msg)  # important that there's no leading space
    # . . push args
    68/push  "F - test-emit-metadata-multiple"/imm32
    68/push  "/def/ghi"/imm32
    68/push  _test-output-stream/imm32
    # . . call
    e8/call  check-stream-equal/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               0xc/imm32         # add to ESP
    # . epilog
    89/copy                         3/mod/direct    4/rm32/ESP    .           .             .           5/r32/EBP   .               .                 # copy EBP to ESP
    5d/pop-to-EBP
    c3/return

test-emit-metadata-in-string-literal:
    # . prolog
    55/push-EBP
    89/copy                         3/mod/direct    5/rm32/EBP    .           .             .           4/r32/ESP   .               .                 # copy ESP to EBP
    # setup
    # . clear-stream(_test-output-stream)
    # . . push args
    68/push  _test-output-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-output-buffered-file+4)
    # . . push args
    b8/copy-to-EAX  _test-output-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
    # var slice/ECX = "\"abc/def\"/ghi"
    68/push  _test-slice-literal-string-with-metadata-end/imm32
    68/push  _test-slice-literal-string/imm32/start
    89/copy                         3/mod/direct    1/rm32/ECX    .           .             .           4/r32/ESP   .               .                 # copy ESP to ECX
    # emit-metadata(_test-output-buffered-file, slice)
    # . . push args
    51/push-ECX
    68/push  _test-output-buffered-file/imm32
    # . . call
    e8/call  emit-metadata/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
    # flush(_test-output-buffered-file)
    # . . push args
    68/push  _test-output-buffered-file/imm32
    # . . call
    e8/call  flush/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               4/imm32           # add to ESP
#?     # dump output {{{
#?     # . write(2/stderr, "result: ^")
#?     # . . push args
#?     68/push  "result: ^"/imm32
#?     68/push  2/imm32/stderr
#?     # . . call
#?     e8/call  write/disp32
#?     # . . discard args
#?     81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
#?     # . write-stream(2/stderr, _test-output-stream)
#?     # . . push args
#?     68/push  _test-output-stream/imm32
#?     68/push  2/imm32/stderr
#?     # . . call
#?     e8/call  write-stream/disp32
#?     # . . discard args
#?     81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
#?     # . write(2/stderr, "$\n")
#?     # . . push args
#?     68/push  "$\n"/imm32
#?     68/push  2/imm32/stderr
#?     # . . call
#?     e8/call  write/disp32
#?     # . . discard args
#?     81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
#?     # }}}
    # check-stream-equal(_test-output-stream, "/ghi", msg)  # important that there's no leading space
    # . . push args
    68/push  "F - test-emit-metadata-in-string-literal"/imm32
    68/push  "/ghi"/imm32
    68/push  _test-output-stream/imm32
    # . . call
    e8/call  check-stream-equal/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               0xc/imm32         # add to ESP
    # . epilog
    89/copy                         3/mod/direct    4/rm32/ESP    .           .             .           5/r32/EBP   .               .                 # copy EBP to ESP
    5d/pop-to-EBP
    c3/return

# (re)compute the bounds of the next word in the line
# return empty string on reaching end of file
next-word:  # line : (address stream byte), out : (address slice)
    # . prolog
    55/push-EBP
    89/copy                         3/mod/direct    5/rm32/EBP    .           .             .           4/r32/ESP   .               .                 # copy ESP to EBP
    # . save registers
    50/push-EAX
    51/push-ECX
    56/push-ESI
    57/push-EDI
    # ESI = line
    8b/copy                         1/mod/*+disp8   5/rm32/EBP    .           .             .           6/r32/ESI   8/disp8         .                 # copy *(EBP+8) to ESI
    # EDI = out
    8b/copy                         1/mod/*+disp8   5/rm32/EBP    .           .             .           7/r32/EDI   0xc/disp8       .                 # copy *(EBP+12) to EDI
    # skip-chars-matching(line, ' ')
    # . . push args
    68/push  0x20/imm32/space
    ff          6/subop/push        1/mod/*+disp8   5/rm32/EBP    .           .             .           .           8/disp8         .                 # push *(EBP+8)
    # . . call
    e8/call  skip-chars-matching/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
$next-word:check0:
    # if (line->read >= line->write) clear out and return
    # . EAX = line->read
    8b/copy                         1/mod/*+disp8   6/rm32/ESI    .           .             .           0/r32/EAX   4/disp8         .                 # copy *(ESI+4) to EAX
    # . if (EAX < line->write) goto next check
    3b/compare                      0/mod/indirect  6/rm32/ESI    .           .             .           0/r32/EAX   .               .                 # compare EAX with *ESI
    7c/jump-if-lesser  $next-word:check-for-comment/disp8
    # . return out = {0, 0}
    c7          0/subop/copy        0/mod/direct    7/rm32/EDI    .           .             .           .           .               0/imm32           # copy to *EDI
    c7          0/subop/copy        1/mod/*+disp8   7/rm32/EDI    .           .             .           .           4/disp8         0/imm32           # copy to *(EDI+4)
    eb/jump  $next-word:end/disp8
$next-word:check-for-comment:
    # out->start = &line->data[line->read]
    8b/copy                         1/mod/*+disp8   6/rm32/ESI    .           .             .           1/r32/ECX   4/disp8         .                 # copy *(ESI+4) to ECX
    8d/copy-address                 1/mod/*+disp8   4/rm32/sib    6/base/ESI  1/index/ECX   .           0/r32/EAX   0xc/disp8       .                 # copy ESI+ECX+12 to EAX
    89/copy                         0/mod/indirect  7/rm32/EDI    .           .             .           0/r32/EAX   .               .                 # copy EAX to *EDI
    # if line->data[line->read] == '#'
    # . EAX = line->data[line->read]
    31/xor                          3/mod/direct    0/rm32/EAX    .           .             .           0/r32/EAX   .               .                 # clear EAX
    8a/copy-byte                    1/mod/*+disp8   4/rm32/sib    6/base/ESI  1/index/ECX   .           0/r32/AL    0xc/disp8       .                 # copy byte at *(ESI+ECX+12) to AL
    # . compare
    3d/compare-EAX-and  0x23/imm32/pound
    75/jump-if-not-equal  $next-word:check-for-string-literal/disp8
$next-word:comment:
    # out->end = &line->data[line->write]
    8b/copy                         0/mod/indirect  6/rm32/ESI    .           .             .           0/r32/EAX   .               .                 # copy *ESI to EAX
    8d/copy-address                 1/mod/*+disp8   4/rm32/sib    6/base/ESI  0/index/EAX   .           0/r32/EAX   0xc/disp8       .                 # copy ESI+EAX+12 to EAX
    89/copy                         1/mod/*+disp8   7/rm32/EDI    .           .             .           0/r32/EAX   4/disp8         .                 # copy EAX to *(EDI+4)
    # line->read = line->write  # skip rest of line
    8b/copy                         0/mod/indirect  6/rm32/ESI    .           .             .           0/r32/EAX   .               .                 # copy *ESI to EAX
    89/copy                         1/mod/*+disp8   6/rm32/ESI    .           .             .           0/r32/EAX   4/disp8         .                 # copy EAX to *(ESI+4)
    # return
    eb/jump  $next-word:end/disp8
$next-word:check-for-string-literal:
    # if line->data[line->read] == '"'
    # . EAX = line->data[line->read]
    31/xor                          3/mod/direct    0/rm32/EAX    .           .             .           0/r32/EAX   .               .                 # clear EAX
    8a/copy-byte                    1/mod/*+disp8   4/rm32/sib    6/base/ESI  1/index/ECX   .           0/r32/AL    0xc/disp8       .                 # copy byte at *(ESI+ECX+12) to AL
    # . compare
    3d/compare-EAX-and  0x22/imm32/dquote
    75/jump-if-not-equal  $next-word:regular-word/disp8
$next-word:string-literal:
    # ++line->read  # skip '"'
    # . persist line->read
    89/copy                         1/mod/*+disp8   6/rm32/ESI    .           .             .           1/r32/ECX   4/disp8         .                 # copy ECX to *(ESI+4)
    # . ++line->read
    ff          0/subop/increment   1/mod/*+disp8   6/rm32/ESI    .           .             .           .           4/disp8         .                 # increment *(ESI+4)
    # parse-string(line, out)
    # . . push args
    57/push-EDI
    56/push-ESI
    # . . call
    e8/call  parse-string/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
    # fall through
$next-word:regular-word:
    # otherwise skip-chars-not-matching-whitespace(line)  # including trailing newline
    # . . push args
    ff          6/subop/push        1/mod/*+disp8   5/rm32/EBP    .           .             .           .           8/disp8         .                 # push *(EBP+8)
    # . . call
    e8/call  skip-chars-not-matching-whitespace/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               4/imm32           # add to ESP
    # out->end = &line->data[line->read]
    8b/copy                         1/mod/*+disp8   6/rm32/ESI    .           .             .           1/r32/ECX   4/disp8         .                 # copy *(ESI+4) to ECX
    8d/copy-address                 1/mod/*+disp8   4/rm32/sib    6/base/ESI  1/index/ECX   .           0/r32/EAX   0xc/disp8       .                 # copy ESI+ECX+12 to EAX
    89/copy                         1/mod/*+disp8   7/rm32/EDI    .           .             .           0/r32/EAX   4/disp8         .                 # copy EAX to *(EDI+4)
$next-word:end:
    # . restore registers
    5f/pop-to-EDI
    5e/pop-to-ESI
    59/pop-to-ECX
    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

parse-string:  # line : (address stream byte), out : (address slice)
    # pseudocode:
    #   ESI = line
    #   curr/ECX = line->data[line->read]
    #   max/EDX = line->data[line->write]
    #   while curr >= max
    #     if (*curr == '"') ++curr, break
    #     if (*curr == '\\') curr+=2, continue
    #     ++curr
    #   line->read = curr - line->data
    #   out->end = curr
    #
    # . prolog
    55/push-EBP
    89/copy                         3/mod/direct    5/rm32/EBP    .           .             .           4/r32/ESP   .               .                 # copy ESP to EBP
    # . save registers
    50/push-EAX
    51/push-ECX
    52/push-EDX
    56/push-ESI
    # ESI = line
    8b/copy                         1/mod/*+disp8   5/rm32/EBP    .           .             .           6/r32/ESI   8/disp8         .                 # copy *(EBP+8) to ESI
    # curr/ECX = &table->data[table->read]
    # . ECX = table->read
    8b/copy                         1/mod/*+disp8   6/rm32/ESI    .           .             .           1/r32/ECX   4/disp8         .                 # copy *(ESI+4) to ECX
    # . ECX = table->data + ECX
    8d/copy-address                 1/mod/*+disp8   4/rm32/sib    6/base/ESI  1/index/ECX   .           1/r32/ECX   0xc/disp8       .                 # copy ESI+ECX+12 to ECX
    # max/EDX = &table->data[table->write]
    # . EDX = table->write
    8b/copy                         0/mod/indirect  6/rm32/ESI    .           .             .           2/r32/EDX   .               .                 # copy *ESI to EDX
    # . EDX = table->data + EDX
    8d/copy-address                 1/mod/*+disp8   4/rm32/sib    6/base/ESI  2/index/EDX   .           2/r32/EDX   0xc/disp8       .                 # copy ESI+EDX+12 to EDX
    # clear EAX
    31/xor                          3/mod/direct    0/rm32/EAX    .           .             .           0/r32/EAX   .               .                 # clear EAX
$parse-string:loop:
    # if (curr >= max) break
    39/compare                      3/mod/direct    1/rm32/ECX    .           .             .           2/r32/EDX   .               .                 # compare ECX with EDX
    7d/jump-if-greater-or-equal  $parse-string:break/disp8
    # c/EAX = *curr
    8a/copy-byte                    0/mod/indirect  1/rm32/ECX    .           .             .           0/r32/AL    .               .                 # copy byte at *ECX to AL
$parse-string:check1:
    # if (c == '"') break  # rely on caller to skip trailing non-whitespace
    3d/compare-EAX-and  0x22/imm32/dquote
    74/jump-if-equal  $parse-string:break/disp8
$parse-string:check2:
    # if (c == '\\') ++curr
    3d/compare-EAX-and  0x5c/imm32/backslash
    75/jump-if-not-equal  $parse-string:continue/disp8
    # . ++curr
    41/increment-ECX
$parse-string:continue:
    # ++curr
    41/increment-ECX
    # loop
    eb/jump  $parse-string:loop/disp8
$parse-string:break:
    # out->end = curr
    8b/copy                         1/mod/*+disp8   5/rm32/EBP    .           .             .           0/r32/EAX   0xc/disp8       .                 # copy *(EBP+12) to EDI
    89/copy                         1/mod/*+disp8   0/rm32/EAX    .           .             .           1/r32/ECX   4/disp8         .                 # copy ECX to *(EAX+4)
    # line->read = curr - line - 12
    29/subtract                     3/mod/direct    1/rm32/ECX    .           .             .           6/r32/ESI   .               .                 # subtract ESI from ECX
    81          5/subop/subtract    3/mod/direct    1/rm32/ECX    .           .             .           .           .               0xc/imm32         # subtract from ECX
    89/copy                         1/mod/*+disp8   6/rm32/ESI    .           .             .           1/r32/ECX   4/disp8         .                 # copy ECX to *(ESI+4)
$parse-string:end:
    # . restore registers
    5e/pop-to-ESI
    5a/pop-to-EDX
    59/pop-to-ECX
    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-next-word:
    # . prolog
    55/push-EBP
    89/copy                         3/mod/direct    5/rm32/EBP    .           .             .           4/r32/ESP   .               .                 # copy ESP to EBP
    # setup
    # . clear-stream(_test-input-stream)
    # . . push args
    68/push  _test-input-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
    # var slice/ECX = {0, 0}
    68/push  0/imm32/end
    68/push  0/imm32/start
    89/copy                         3/mod/direct    1/rm32/ECX    .           .             .           4/r32/ESP   .               .                 # copy ESP to ECX
    # write(_test-input-stream, "  ab")
    # . . push args
    68/push  "  ab"/imm32
    68/push  _test-input-stream/imm32
    # . . call
    e8/call  write/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
    # next-word(_test-input-stream, slice)
    # . . push args
    51/push-ECX
    68/push  _test-input-stream/imm32
    # . . call
    e8/call  next-word/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
    # check-ints-equal(slice->start - _test-input-stream->data, 2, msg)
    # . check-ints-equal(slice->start - _test-input-stream, 14, msg)
    # . . push args
    68/push  "F - test-next-word: start"/imm32
    68/push  0xe/imm32
    # . . push slice->start - _test-input-stream
    8b/copy                         0/mod/indirect  1/rm32/ECX    .           .             .           0/r32/EAX   .               .                 # copy *ECX to EAX
    81          5/subop/subtract    3/mod/direct    0/rm32/EAX    .           .             .           .           .               _test-input-stream/imm32 # subtract from EAX
    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
    # check-ints-equal(slice->end - _test-input-stream->data, 4, msg)
    # . check-ints-equal(slice->end - _test-input-stream, 16, msg)
    # . . push args
    68/push  "F - test-next-word: end"/imm32
    68/push  0x10/imm32
    # . . push slice->end - _test-input-stream
    8b/copy                         1/mod/*+disp8   1/rm32/ECX    .           .             .           0/r32/EAX   4/disp8         .                 # copy *(ECX+4) to EAX
    81          5/subop/subtract    3/mod/direct    0/rm32/EAX    .           .             .           .           .               _test-input-stream/imm32 # subtract from EAX
    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
    # . epilog
    89/copy                         3/mod/direct    4/rm32/ESP    .           .             .           5/r32/EBP   .               .                 # copy EBP to ESP
    5d/pop-to-EBP
    c3/return

test-next-word-returns-whole-comment:
    # . prolog
    55/push-EBP
    89/copy                         3/mod/direct    5/rm32/EBP    .           .             .           4/r32/ESP   .               .                 # copy ESP to EBP
    # setup
    # . clear-stream(_test-input-stream)
    # . . push args
    68/push  _test-input-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
    # var slice/ECX = {0, 0}
    68/push  0/imm32/end
    68/push  0/imm32/start
    89/copy                         3/mod/direct    1/rm32/ECX    .           .             .           4/r32/ESP   .               .                 # copy ESP to ECX
    # write(_test-input-stream, "  # a")
    # . . push args
    68/push  "  # a"/imm32
    68/push  _test-input-stream/imm32
    # . . call
    e8/call  write/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
    # next-word(_test-input-stream, slice)
    # . . push args
    51/push-ECX
    68/push  _test-input-stream/imm32
    # . . call
    e8/call  next-word/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
    # check-ints-equal(slice->start - _test-input-stream->data, 2, msg)
    # . check-ints-equal(slice->start - _test-input-stream, 14, msg)
    # . . push args
    68/push  "F - test-next-word-returns-whole-comment: start"/imm32
    68/push  0xe/imm32
    # . . push slice->start - _test-input-stream
    8b/copy                         0/mod/indirect  1/rm32/ECX    .           .             .           0/r32/EAX   .               .                 # copy *ECX to EAX
    81          5/subop/subtract    3/mod/direct    0/rm32/EAX    .           .             .           .           .               _test-input-stream/imm32 # subtract from EAX
    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
    # check-ints-equal(slice->end - _test-input-stream->data, 5, msg)
    # . check-ints-equal(slice->end - _test-input-stream, 17, msg)
    # . . push args
    68/push  "F - test-next-word-returns-whole-comment: end"/imm32
    68/push  0x11/imm32
    # . . push slice->end - _test-input-stream
    8b/copy                         1/mod/*+disp8   1/rm32/ECX    .           .             .           0/r32/EAX   4/disp8         .                 # copy *(ECX+4) to EAX
    81          5/subop/subtract    3/mod/direct    0/rm32/EAX    .           .             .           .           .               _test-input-stream/imm32 # subtract from EAX
    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
    # . epilog
    89/copy                         3/mod/direct    4/rm32/ESP    .           .             .           5/r32/EBP   .               .                 # copy EBP to ESP
    5d/pop-to-EBP
    c3/return

test-next-word-returns-empty-string-on-eof:
    # . prolog
    55/push-EBP
    89/copy                         3/mod/direct    5/rm32/EBP    .           .             .           4/r32/ESP   .               .                 # copy ESP to EBP
    # setup
    # . clear-stream(_test-input-stream)
    # . . push args
    68/push  _test-input-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
    # var slice/ECX = {0, 0}
    68/push  0/imm32/end
    68/push  0/imm32/start
    89/copy                         3/mod/direct    1/rm32/ECX    .           .             .           4/r32/ESP   .               .                 # copy ESP to ECX
    # write nothing to _test-input-stream
    # next-word(_test-input-stream, slice)
    # . . push args
    51/push-ECX
    68/push  _test-input-stream/imm32
    # . . call
    e8/call  next-word/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
    # check-ints-equal(slice->end - slice->start, 0, msg)
    # . . push args
    68/push  "F - test-next-word-returns-empty-string-on-eof"/imm32
    68/push  0/imm32
    # . . push slice->end - slice->start
    8b/copy                         1/mod/*+disp8   1/rm32/ECX    .           .             .           0/r32/EAX   4/disp8         .                 # copy *(ECX+4) to EAX
    2b/subtract                     0/mod/indirect  1/rm32/ECX    .           .             .           0/r32/EAX   .               .                 # subtract *ECX from EAX
    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
    # . epilog
    89/copy                         3/mod/direct    4/rm32/ESP    .           .             .           5/r32/EBP   .               .                 # copy EBP to ESP
    5d/pop-to-EBP
    c3/return

test-next-word-returns-whole-string:
    # . prolog
    55/push-EBP
    89/copy                         3/mod/direct    5/rm32/EBP    .           .             .           4/r32/ESP   .               .                 # copy ESP to EBP
    # setup
    # . clear-stream(_test-input-stream)
    # . . push args
    68/push  _test-input-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
    # var slice/ECX = {0, 0}
    68/push  0/imm32/end
    68/push  0/imm32/start
    89/copy                         3/mod/direct    1/rm32/ECX    .           .             .           4/r32/ESP   .               .                 # copy ESP to ECX
    # write(_test-input-stream, " \"a b\"/imm32 ")
    # . . push args
    68/push  " \"a b\"/imm32 "/imm32
    68/push  _test-input-stream/imm32
    # . . call
    e8/call  write/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
    # next-word(_test-input-stream, slice)
    # . . push args
    51/push-ECX
    68/push  _test-input-stream/imm32
    # . . call
    e8/call  next-word/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
    # check-ints-equal(slice->start - _test-input-stream->data, 1, msg)
    # . check-ints-equal(slice->start - _test-input-stream, 13, msg)
    # . . push args
    68/push  "F - test-next-word-returns-whole-string: start"/imm32
    68/push  0xd/imm32
    # . . push slice->start - _test-input-stream
    8b/copy                         0/mod/indirect  1/rm32/ECX    .           .             .           0/r32/EAX   .               .                 # copy *ECX to EAX
    81          5/subop/subtract    3/mod/direct    0/rm32/EAX    .           .             .           .           .               _test-input-stream/imm32 # subtract from EAX
    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
    # check-ints-equal(slice->end - _test-input-stream->data, 12, msg)
    # . check-ints-equal(slice->end - _test-input-stream, 24, msg)
    # . . push args
    68/push  "F - test-next-word-returns-whole-string: end"/imm32
    68/push  0x18/imm32
    # . . push slice->end - _test-input-stream
    8b/copy                         1/mod/*+disp8   1/rm32/ECX    .           .             .           0/r32/EAX   4/disp8         .                 # copy *(ECX+4) to EAX
    81          5/subop/subtract    3/mod/direct    0/rm32/EAX    .           .             .           .           .               _test-input-stream/imm32 # subtract from EAX
    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
    # . epilog
    89/copy                         3/mod/direct    4/rm32/ESP    .           .             .           5/r32/EBP   .               .                 # copy EBP to ESP
    5d/pop-to-EBP
    c3/return

test-next-word-returns-string-with-escapes:
    # . prolog
    55/push-EBP
    89/copy                         3/mod/direct    5/rm32/EBP    .           .             .           4/r32/ESP   .               .                 # copy ESP to EBP
    # setup
    # . clear-stream(_test-input-stream)
    # . . push args
    68/push  _test-input-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
    # var slice/ECX = {0, 0}
    68/push  0/imm32/end
    68/push  0/imm32/start
    89/copy                         3/mod/direct    1/rm32/ECX    .           .             .           4/r32/ESP   .               .                 # copy ESP to ECX
    # write(_test-input-stream, " \"a\\\"b\"/x")
    # . . push args
    68/push  " \"a\\\"b\"/x"/imm32
    68/push  _test-input-stream/imm32
    # . . call
    e8/call  write/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
    # next-word(_test-input-stream, slice)
    # . . push args
    51/push-ECX
    68/push  _test-input-stream/imm32
    # . . call
    e8/call  next-word/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
    # check-ints-equal(slice->start - _test-input-stream->data, 1, msg)
    # . check-ints-equal(slice->start - _test-input-stream, 13, msg)
    # . . push args
    68/push  "F - test-next-word-returns-string-with-escapes: start"/imm32
    68/push  0xd/imm32
    # . . push slice->start - _test-input-stream
    8b/copy                         0/mod/indirect  1/rm32/ECX    .           .             .           0/r32/EAX   .               .                 # copy *ECX to EAX
    81          5/subop/subtract    3/mod/direct    0/rm32/EAX    .           .             .           .           .               _test-input-stream/imm32 # subtract from EAX
    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
    # check-ints-equal(slice->end - _test-input-stream->data, 9, msg)
    # . check-ints-equal(slice->end - _test-input-stream, 21, msg)
    # . . push args
    68/push  "F - test-next-word-returns-string-with-escapes: end"/imm32
    68/push  0x15/imm32
    # . . push slice->end - _test-input-stream
    8b/copy                         1/mod/*+disp8   1/rm32/ECX    .           .             .           0/r32/EAX   4/disp8         .                 # copy *(ECX+4) to EAX
    81          5/subop/subtract    3/mod/direct    0/rm32/EAX    .           .             .           .           .               _test-input-stream/imm32 # subtract from EAX
    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
    # . epilog
    89/copy                         3/mod/direct    4/rm32/ESP    .           .             .           5/r32/EBP   .               .                 # copy EBP to ESP
    5d/pop-to-EBP
    c3/return

# update line->read to end of string literal surrounded by double quotes
# line-read must start out at a double-quote
skip-string:  # line : (address stream)
    # . prolog
    55/push-EBP
    89/copy                         3/mod/direct    5/rm32/EBP    .           .             .           4/r32/ESP   .               .                 # copy ESP to EBP
    # . save registers
$skip-string: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-skip-string:
    # . prolog
    55/push-EBP
    89/copy                         3/mod/direct    5/rm32/EBP    .           .             .           4/r32/ESP   .               .                 # copy ESP to EBP
    # setup
    # . clear-stream(_test-input-stream)
    # . . push args
    68/push  _test-input-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
    # . write(_test-input-stream, "\"abc\" def")
    # .                   indices:  0123 45
    # . . push args
    68/push  "\"abc\" def"/imm32
    68/push  _test-input-stream/imm32
    # . . call
    e8/call  write/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
    # precondition: line->read == 0
    # . . push args
    68/push  "F - test-skip-string/precondition"/imm32
    68/push  0/imm32
    b8/copy-to-EAX  _test-input-stream/imm32
    ff          6/subop/push        1/mod/*+disp8   0/rm32/EAX    .           .             .           .           4/disp8         .                 # push *(EAX+4)
    # . . call
    e8/call  check-ints-equal/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               0xc/imm32         # add to ESP
    # skip-string(_test-input-stream)
    # . . push args
    68/push  _test-input-stream/imm32
    # . . call
    e8/call  skip-string/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               4/imm32           # add to ESP
    # check-ints-equal(line->read, 5, msg)
    # . . push args
    68/push  "F - test-skip-string"/imm32
    68/push  5/imm32
    b8/copy-to-EAX  _test-input-stream/imm32
    ff          6/subop/push        1/mod/*+disp8   0/rm32/EAX    .           .             .           .           4/disp8         .                 # push *(EAX+4)
    # . . call
    e8/call  check-ints-equal/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               0xc/imm32         # add to ESP
    # . epilog
    89/copy                         3/mod/direct    4/rm32/ESP    .           .             .           5/r32/EBP   .               .                 # copy EBP to ESP
    5d/pop-to-EBP
    c3/return

test-skip-string-ignores-spaces:
    # . prolog
    55/push-EBP
    89/copy                         3/mod/direct    5/rm32/EBP    .           .             .           4/r32/ESP   .               .                 # copy ESP to EBP
    # setup
    # . clear-stream(_test-input-stream)
    # . . push args
    68/push  _test-input-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
    # . write(_test-input-stream, "\"a b\"/yz")
    # .                   indices:  0123 45
    # . . push args
    68/push  "\"a b\"/yz"/imm32
    68/push  _test-input-stream/imm32
    # . . call
    e8/call  write/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
    # precondition: line->read == 0
    # . . push args
    68/push  "F - test-skip-string-ignores-spaces/precondition"/imm32
    68/push  0/imm32
    b8/copy-to-EAX  _test-input-stream/imm32
    ff          6/subop/push        1/mod/*+disp8   0/rm32/EAX    .           .             .           .           4/disp8         .                 # push *(EAX+4)
    # . . call
    e8/call  check-ints-equal/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               0xc/imm32         # add to ESP
    # skip-string(_test-input-stream)
    # . . push args
    68/push  _test-input-stream/imm32
    # . . call
    e8/call  skip-string/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               4/imm32           # add to ESP
    # check-ints-equal(line->read, 5, msg)
    # . . push args
    68/push  "F - test-skip-string-ignores-spaces"/imm32
    68/push  5/imm32
    b8/copy-to-EAX  _test-input-stream/imm32
    ff          6/subop/push        1/mod/*+disp8   0/rm32/EAX    .           .             .           .           4/disp8         .                 # push *(EAX+4)
    # . . call
    e8/call  check-ints-equal/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               0xc/imm32         # add to ESP
    # . epilog
    89/copy                         3/mod/direct    4/rm32/ESP    .           .             .           5/r32/EBP   .               .                 # copy EBP to ESP
    5d/pop-to-EBP
    c3/return

test-skip-string-ignores-escapes:
    # . prolog
    55/push-EBP
    89/copy                         3/mod/direct    5/rm32/EBP    .           .             .           4/r32/ESP   .               .                 # copy ESP to EBP
    # setup
    # . clear-stream(_test-input-stream)
    # . . push args
    68/push  _test-input-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
    # . write(_test-input-stream, "\"a\\\"b\"/yz")
    # .                   indices:  01 2 34 56
    # . . push args
    68/push  "\"a\\\"b\"/yz"/imm32
    68/push  _test-input-stream/imm32
    # . . call
    e8/call  write/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
    # precondition: line->read == 0
    # . . push args
    68/push  "F - test-skip-string-ignores-escapes/precondition"/imm32
    68/push  0/imm32
    b8/copy-to-EAX  _test-input-stream/imm32
    ff          6/subop/push        1/mod/*+disp8   0/rm32/EAX    .           .             .           .           4/disp8         .                 # push *(EAX+4)
    # . . call
    e8/call  check-ints-equal/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               0xc/imm32         # add to ESP
    # skip-string(_test-input-stream)
    # . . push args
    68/push  _test-input-stream/imm32
    # . . call
    e8/call  skip-string/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               4/imm32           # add to ESP
    # check-ints-equal(line->read, 6, msg)
    # . . push args
    68/push  "F - test-skip-string-ignores-escapes"/imm32
    68/push  6/imm32
    b8/copy-to-EAX  _test-input-stream/imm32
    ff          6/subop/push        1/mod/*+disp8   0/rm32/EAX    .           .             .           .           4/disp8         .                 # push *(EAX+4)
    # . . call
    e8/call  check-ints-equal/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               0xc/imm32         # add to ESP
    # . epilog
    89/copy                         3/mod/direct    4/rm32/ESP    .           .             .           5/r32/EBP   .               .                 # copy EBP to ESP
    5d/pop-to-EBP
    c3/return

skip-string-in-slice:  # curr : (address byte), end : (address byte) -> new_curr/EAX
    # . prolog
    55/push-EBP
    89/copy                         3/mod/direct    5/rm32/EBP    .           .             .           4/r32/ESP   .               .                 # copy ESP to EBP
    # . save registers
$skip-string-in-slice: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-skip-string-in-slice:
    # . prolog
    55/push-EBP
    89/copy                         3/mod/direct    5/rm32/EBP    .           .             .           4/r32/ESP   .               .                 # copy ESP to EBP
    # setup: (EAX..ECX) = "\"abc\" def"
    b8/copy-to-EAX  "\"abc\" def"/imm32
    8b/copy                         0/mod/indirect  0/rm32/EAX    .           .             .           1/r32/ECX   .               .                 # copy *EAX to ECX
    8d/copy-address                 1/mod/*+disp8   4/rm32/sib    0/base/EAX  1/index/ECX   .           1/r32/ECX   4/disp8         .                 # copy EAX+ECX+4 to ECX
    05/add-to-EAX  4/imm32
    # EAX = skip-string-in-slice(EAX, ECX)
    # . . push args
    51/push-ECX
    50/push-EAX
    # . . call
    e8/call  skip-string-in-slice/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
    # check-ints-equal(ECX-EAX, 4, msg)  # number of chars remaining after the string literal
    # . . push args
    68/push  "F - test-skip-string-in-slice"/imm32
    68/push  4/imm32
    # . . push ECX-EAX
    29/subtract                     3/mod/direct    1/rm32/ECX    .           .             .           0/r32/EAX   .               .                 # subtract EAX from ECX
    51/push-ECX
    # . . call
    e8/call  check-ints-equal/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               0xc/imm32         # add to ESP
    # . epilog
    89/copy                         3/mod/direct    4/rm32/ESP    .           .             .           5/r32/EBP   .               .                 # copy EBP to ESP
    5d/pop-to-EBP
    c3/return

test-skip-string-in-slice-ignores-spaces:
    # . prolog
    55/push-EBP
    89/copy                         3/mod/direct    5/rm32/EBP    .           .             .           4/r32/ESP   .               .                 # copy ESP to EBP
    # setup: (EAX..ECX) = "\"a b\"/yz"
    b8/copy-to-EAX  "\"abc\" def"/imm32
    8b/copy                         0/mod/indirect  0/rm32/EAX    .           .             .           1/r32/ECX   .               .                 # copy *EAX to ECX
    8d/copy-address                 1/mod/*+disp8   4/rm32/sib    0/base/EAX  1/index/ECX   .           1/r32/ECX   4/disp8         .                 # copy EAX+ECX+4 to ECX
    05/add-to-EAX  4/imm32
    # EAX = skip-string-in-slice(EAX, ECX)
    # . . push args
    51/push-ECX
    50/push-EAX
    # . . call
    e8/call  skip-string-in-slice/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
    # check-ints-equal(ECX-EAX, 3, msg)  # number of chars remaining after the string literal
    # . . push args
    68/push  "F - test-skip-string-in-slice-ignores-spaces"/imm32
    68/push  3/imm32
    # . . push ECX-EAX
    29/subtract                     3/mod/direct    1/rm32/ECX    .           .             .           0/r32/EAX   .               .                 # subtract EAX from ECX
    51/push-ECX
    # . . call
    e8/call  check-ints-equal/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               0xc/imm32         # add to ESP
    # . epilog
    89/copy                         3/mod/direct    4/rm32/ESP    .           .             .           5/r32/EBP   .               .                 # copy EBP to ESP
    5d/pop-to-EBP
    c3/return

test-skip-string-in-slice-ignores-escapes:
    # . prolog
    55/push-EBP
    89/copy                         3/mod/direct    5/rm32/EBP    .           .             .           4/r32/ESP   .               .                 # copy ESP to EBP
    # setup: (EAX..ECX) = "\"a\\\"b\"/yz"
    b8/copy-to-EAX  "\"a\\\"b\"/yz"/imm32
    8b/copy                         0/mod/indirect  0/rm32/EAX    .           .             .           1/r32/ECX   .               .                 # copy *EAX to ECX
    8d/copy-address                 1/mod/*+disp8   4/rm32/sib    0/base/EAX  1/index/ECX   .           1/r32/ECX   4/disp8         .                 # copy EAX+ECX+4 to ECX
    05/add-to-EAX  4/imm32
    # EAX = skip-string-in-slice(EAX, ECX)
    # . . push args
    51/push-ECX
    50/push-EAX
    # . . call
    e8/call  skip-string-in-slice/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
    # check-ints-equal(ECX-EAX, 3, msg)  # number of chars remaining after the string literal
    # . . push args
    68/push  "F - test-skip-string-in-slice-ignores-escapes"/imm32
    68/push  3/imm32
    # . . push ECX-EAX
    29/subtract                     3/mod/direct    1/rm32/ECX    .           .             .           0/r32/EAX   .               .                 # subtract EAX from ECX
    51/push-ECX
    # . . call
    e8/call  check-ints-equal/disp32
    # . . discard args
    81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               0xc/imm32         # add to ESP
    # . epilog
    89/copy                         3/mod/direct    4/rm32/ESP    .           .             .           5/r32/EBP   .               .                 # copy EBP to ESP
    5d/pop-to-EBP
    c3/return

== data

Segment-size:
  0x1000/imm32/4KB

Next-string-literal:  # tracks the next auto-generated variable name
  1/imm32

Heap:
  # curr
  0/imm32
  # limit
  0/imm32

# length-prefixed string containing just a single space
Space:
    # size
    1/imm32
    # data
    20/space

# length-prefixed string containing just a single slash
Slash:
    # size
    1/imm32
    # data
    2f/slash

_test-slice-abc:
  22/dquote 61/a 62/b 63/c 22/dquote  # "abc"
_test-slice-abc-end:

_test-slice-empty-string-literal:
  22/dquote 22/dquote  # ""
_test-slice-empty-string-literal-end:

_test-slice-a-space-b:
  22/dquote 61/a 20/space 62/b 22/dquote  # "a b"
_test-slice-a-space-b-end:

_test-slice-a-dquote-b:
  22/dquote 61/a 5c/backslash 22/dquote 62/b 22/dquote  # "a\"b"
_test-slice-a-dquote-b-end:

# abc/def/ghi
_test-slice-word:
  61/a 62/b 63/c  # abc
_test-slice-word-datum-end:
  2f/slash 64/d 65/e 66/f  # /def
_test-slice-word-end:
  2f/slash 67/g 68/h 69/i  # /ghi
_test-slice-word-end2:

# "abc/def"/ghi
_test-slice-literal-string:
  22/dquote
  61/a 62/b 63/c  # abc
  2f/slash 64/d 65/e 66/f  # /def
  22/dquote
_test-slice-literal-string-end:
  2f/slash 67/g 68/h 69/i  # /ghi
_test-slice-literal-string-with-metadata-end:

# . . vim:nowrap:textwidth=0
generated by cgit-pink 1.4.1-2-gfad0 (git 2.36.2.497.gbbea4dcf42) at 2024-12-04 14:31:29 +0000