2020-09-07 23:38:14 +00:00
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
< html >
< head >
< meta http-equiv = "content-type" content = "text/html; charset=UTF-8" >
< title > Mu - 403unicode.mu< / title >
< meta name = "Generator" content = "Vim/8.1" >
< meta name = "plugin-version" content = "vim8.1_v1" >
< meta name = "syntax" content = "none" >
< meta name = "settings" content = "number_lines,use_css,pre_wrap,no_foldcolumn,expand_tabs,line_ids,prevent_copy=" >
2021-06-25 04:44:18 +00:00
< meta name = "colorscheme" content = "minimal-light" >
2020-09-07 23:38:14 +00:00
< style type = "text/css" >
<!--
2021-06-25 04:44:18 +00:00
pre { white-space: pre-wrap; font-family: monospace; color: #000000; background-color: #eeeeee; }
body { font-size:12pt; font-family: monospace; color: #000000; background-color: #eeeeee; }
2020-09-07 23:38:14 +00:00
a { color:inherit; }
* { font-size:12pt; font-size: 1em; }
2021-03-24 00:31:08 +00:00
.PreProc { color: #c000c0; }
2021-06-16 04:50:13 +00:00
.muRegEdi { color: #87ffd7; }
2021-03-24 00:31:08 +00:00
.Special { color: #ff6060; }
2020-09-07 23:38:14 +00:00
.LineNr { }
.Constant { color: #008787; }
2021-06-16 04:50:13 +00:00
.muRegEdx { color: #878700; }
.muRegEcx { color: #af875f; }
.muRegEsi { color: #87d787; }
.muRegEax { color: #875f00; }
.Delimiter { color: #c000c0; }
2020-10-05 18:00:05 +00:00
.muFunction { color: #af5f00; text-decoration: underline; }
2021-03-24 00:31:08 +00:00
.muComment { color: #005faf; }
2020-09-07 23:38:14 +00:00
-->
< / style >
< script type = 'text/javascript' >
<!--
/* function to open any folds containing a jumped-to line before jumping to it */
function JumpToLine()
{
var lineNum;
lineNum = window.location.hash;
lineNum = lineNum.substr(1); /* strip off '#' */
if (lineNum.indexOf('L') == -1) {
lineNum = 'L'+lineNum;
}
var lineElem = document.getElementById(lineNum);
/* Always jump to new location even if the line was hidden inside a fold, or
* we corrected the raw number to a line ID.
*/
if (lineElem) {
lineElem.scrollIntoView(true);
}
return true;
}
if ('onhashchange' in window) {
window.onhashchange = JumpToLine;
}
-->
< / script >
< / head >
< body onload = 'JumpToLine();' >
2020-12-30 17:37:50 +00:00
< a href = 'https://github.com/akkartik/mu/blob/main/403unicode.mu' > https://github.com/akkartik/mu/blob/main/403unicode.mu< / a >
2020-09-07 23:38:14 +00:00
< pre id = 'vimCodeElement' >
2020-10-05 18:00:05 +00:00
< span id = "L1" class = "LineNr" > 1 < / span > < span class = "muComment" > # Helpers for Unicode.< / span >
< span id = "L2" class = "LineNr" > 2 < / span > < span class = "muComment" > #< / span >
< span id = "L3" class = "LineNr" > 3 < / span > < span class = "muComment" > # Mu has no characters, only code points and graphemes.< / span >
< span id = "L4" class = "LineNr" > 4 < / span > < span class = "muComment" > # Code points are the indivisible atoms of text streams.< / span >
< span id = "L5" class = "LineNr" > 5 < / span > < span class = "muComment" > # < a href = "https://en.wikipedia.org/wiki/Code_point" > https://en.wikipedia.org/wiki/Code_point< / a > < / span >
< span id = "L6" class = "LineNr" > 6 < / span > < span class = "muComment" > # Graphemes are the smallest self-contained unit of text.< / span >
< span id = "L7" class = "LineNr" > 7 < / span > < span class = "muComment" > # Graphemes may consist of multiple code points.< / span >
< span id = "L8" class = "LineNr" > 8 < / span > < span class = "muComment" > #< / span >
< span id = "L9" class = "LineNr" > 9 < / span > < span class = "muComment" > # Mu graphemes are always represented in utf-8, and they are required to fit< / span >
< span id = "L10" class = "LineNr" > 10 < / span > < span class = "muComment" > # in 4 bytes.< / span >
< span id = "L11" class = "LineNr" > 11 < / span > < span class = "muComment" > #< / span >
< span id = "L12" class = "LineNr" > 12 < / span > < span class = "muComment" > # Mu doesn't currently support combining code points, or graphemes made of< / span >
< span id = "L13" class = "LineNr" > 13 < / span > < span class = "muComment" > # multiple code points. One day we will.< / span >
< span id = "L14" class = "LineNr" > 14 < / span > < span class = "muComment" > # We also don't currently support code points that translate into multiple< / span >
< span id = "L15" class = "LineNr" > 15 < / span > < span class = "muComment" > # or wide graphemes. (In particular, Tab will never be supported.)< / span >
2020-09-07 23:38:14 +00:00
< span id = "L16" class = "LineNr" > 16 < / span >
2020-10-05 18:00:05 +00:00
< span id = "L17" class = "LineNr" > 17 < / span > < span class = "muComment" > # transliterated from tb_utf8_unicode_to_char in < a href = "https://github.com/nsf/termbox" > https://github.com/nsf/termbox< / a > < / span >
< span id = "L18" class = "LineNr" > 18 < / span > < span class = "muComment" > # < a href = "https://wiki.tcl-lang.org/page/UTF%2D8+bit+by+bit" > https://wiki.tcl-lang.org/page/UTF%2D8+bit+by+bit< / a > explains the algorithm< / span >
< span id = "L19" class = "LineNr" > 19 < / span > < span class = "muComment" > #< / span >
< span id = "L20" class = "LineNr" > 20 < / span > < span class = "muComment" > # The day we want to support combining characters, this function will need to< / span >
< span id = "L21" class = "LineNr" > 21 < / span > < span class = "muComment" > # take multiple code points. Or something.< / span >
2021-06-16 04:50:13 +00:00
< span id = "L22" class = "LineNr" > 22 < / span > < span class = "PreProc" > fn< / span > < span class = "muFunction" > < a href = '403unicode.mu.html#L22' > to-grapheme< / a > < / span > in: code-point< span class = "PreProc" > -> < / span > _/< span class = "muRegEax" > eax< / span > : grapheme < span class = "Delimiter" > {< / span >
< span id = "L23" class = "LineNr" > 23 < / span > < span class = "PreProc" > var< / span > c/< span class = "muRegEax" > eax< / span > : int < span class = "Special" > < -< / span > copy in
< span id = "L24" class = "LineNr" > 24 < / span > < span class = "PreProc" > var< / span > num-trailers/< span class = "muRegEcx" > ecx< / span > : int < span class = "Special" > < -< / span > copy < span class = "Constant" > 0< / span >
< span id = "L25" class = "LineNr" > 25 < / span > < span class = "PreProc" > var< / span > first/< span class = "muRegEdx" > edx< / span > : int < span class = "Special" > < -< / span > copy < span class = "Constant" > 0< / span >
2020-11-03 05:24:53 +00:00
< span id = "L26" class = "LineNr" > 26 < / span > $to-grapheme:compute-length: < span class = "Delimiter" > {< / span >
< span id = "L27" class = "LineNr" > 27 < / span > < span class = "muComment" > # single byte: just return it< / span >
< span id = "L28" class = "LineNr" > 28 < / span > compare c, < span class = "Constant" > 0x7f< / span >
< span id = "L29" class = "LineNr" > 29 < / span > < span class = "Delimiter" > {< / span >
< span id = "L30" class = "LineNr" > 30 < / span > < span class = "PreProc" > break-if-> < / span >
2021-06-16 04:50:13 +00:00
< span id = "L31" class = "LineNr" > 31 < / span > < span class = "PreProc" > var< / span > g/< span class = "muRegEax" > eax< / span > : grapheme < span class = "Special" > < -< / span > copy c
2020-11-03 05:24:53 +00:00
< span id = "L32" class = "LineNr" > 32 < / span > < span class = "PreProc" > return< / span > g
< span id = "L33" class = "LineNr" > 33 < / span > < span class = "Delimiter" > }< / span >
< span id = "L34" class = "LineNr" > 34 < / span > < span class = "muComment" > # 2 bytes< / span >
< span id = "L35" class = "LineNr" > 35 < / span > compare c, < span class = "Constant" > 0x7ff< / span >
< span id = "L36" class = "LineNr" > 36 < / span > < span class = "Delimiter" > {< / span >
< span id = "L37" class = "LineNr" > 37 < / span > < span class = "PreProc" > break-if-> < / span >
2021-03-24 00:31:08 +00:00
< span id = "L38" class = "LineNr" > 38 < / span > num-trailers < span class = "Special" > < -< / span > copy < span class = "Constant" > 1< / span >
< span id = "L39" class = "LineNr" > 39 < / span > first < span class = "Special" > < -< / span > copy < span class = "Constant" > 0xc0< / span >
2020-11-03 05:24:53 +00:00
< span id = "L40" class = "LineNr" > 40 < / span > < span class = "PreProc" > break< / span > $to-grapheme:compute-length
< span id = "L41" class = "LineNr" > 41 < / span > < span class = "Delimiter" > }< / span >
< span id = "L42" class = "LineNr" > 42 < / span > < span class = "muComment" > # 3 bytes< / span >
< span id = "L43" class = "LineNr" > 43 < / span > compare c, < span class = "Constant" > 0xffff< / span >
< span id = "L44" class = "LineNr" > 44 < / span > < span class = "Delimiter" > {< / span >
< span id = "L45" class = "LineNr" > 45 < / span > < span class = "PreProc" > break-if-> < / span >
2021-03-24 00:31:08 +00:00
< span id = "L46" class = "LineNr" > 46 < / span > num-trailers < span class = "Special" > < -< / span > copy < span class = "Constant" > 2< / span >
< span id = "L47" class = "LineNr" > 47 < / span > first < span class = "Special" > < -< / span > copy < span class = "Constant" > 0xe0< / span >
2020-11-03 05:24:53 +00:00
< span id = "L48" class = "LineNr" > 48 < / span > < span class = "PreProc" > break< / span > $to-grapheme:compute-length
< span id = "L49" class = "LineNr" > 49 < / span > < span class = "Delimiter" > }< / span >
< span id = "L50" class = "LineNr" > 50 < / span > < span class = "muComment" > # 4 bytes< / span >
< span id = "L51" class = "LineNr" > 51 < / span > compare c, < span class = "Constant" > 0x1fffff< / span >
< span id = "L52" class = "LineNr" > 52 < / span > < span class = "Delimiter" > {< / span >
< span id = "L53" class = "LineNr" > 53 < / span > < span class = "PreProc" > break-if-> < / span >
2021-03-24 00:31:08 +00:00
< span id = "L54" class = "LineNr" > 54 < / span > num-trailers < span class = "Special" > < -< / span > copy < span class = "Constant" > 3< / span >
< span id = "L55" class = "LineNr" > 55 < / span > first < span class = "Special" > < -< / span > copy < span class = "Constant" > 0xf0< / span >
2020-11-03 05:24:53 +00:00
< span id = "L56" class = "LineNr" > 56 < / span > < span class = "PreProc" > break< / span > $to-grapheme:compute-length
< span id = "L57" class = "LineNr" > 57 < / span > < span class = "Delimiter" > }< / span >
< span id = "L58" class = "LineNr" > 58 < / span > < span class = "muComment" > # more than 4 bytes: unsupported< / span >
2021-03-24 00:31:08 +00:00
< span id = "L59" class = "LineNr" > 59 < / span > < span class = "muComment" > # TODO: print error message to stderr< / span >
2020-11-03 05:24:53 +00:00
< span id = "L60" class = "LineNr" > 60 < / span > compare c, < span class = "Constant" > 0x1fffff< / span >
< span id = "L61" class = "LineNr" > 61 < / span > < span class = "Delimiter" > {< / span >
< span id = "L62" class = "LineNr" > 62 < / span > < span class = "PreProc" > break-if-> < / span >
2021-03-24 00:31:08 +00:00
< span id = "L63" class = "LineNr" > 63 < / span > < span class = "PreProc" > return< / span > < span class = "Constant" > 0< / span >
< span id = "L64" class = "LineNr" > 64 < / span > < span class = "Delimiter" > }< / span >
< span id = "L65" class = "LineNr" > 65 < / span > < span class = "Delimiter" > }< / span >
< span id = "L66" class = "LineNr" > 66 < / span > < span class = "muComment" > # emit trailer bytes, 6 bits from 'in', first two bits '10'< / span >
2021-06-16 04:50:13 +00:00
< span id = "L67" class = "LineNr" > 67 < / span > < span class = "PreProc" > var< / span > result/< span class = "muRegEdi" > edi< / span > : grapheme < span class = "Special" > < -< / span > copy < span class = "Constant" > 0< / span >
2021-03-24 00:31:08 +00:00
< span id = "L68" class = "LineNr" > 68 < / span > < span class = "Delimiter" > {< / span >
< span id = "L69" class = "LineNr" > 69 < / span > compare num-trailers, < span class = "Constant" > 0< / span >
< span id = "L70" class = "LineNr" > 70 < / span > < span class = "PreProc" > break-if-< =< / span >
2021-06-16 04:50:13 +00:00
< span id = "L71" class = "LineNr" > 71 < / span > < span class = "PreProc" > var< / span > tmp/< span class = "muRegEsi" > esi< / span > : int < span class = "Special" > < -< / span > copy c
2021-03-24 00:31:08 +00:00
< span id = "L72" class = "LineNr" > 72 < / span > tmp < span class = "Special" > < -< / span > and < span class = "Constant" > 0x3f< / span >
< span id = "L73" class = "LineNr" > 73 < / span > tmp < span class = "Special" > < -< / span > or < span class = "Constant" > 0x80< / span >
< span id = "L74" class = "LineNr" > 74 < / span > result < span class = "Special" > < -< / span > shift-left < span class = "Constant" > 8< / span >
< span id = "L75" class = "LineNr" > 75 < / span > result < span class = "Special" > < -< / span > or tmp
< span id = "L76" class = "LineNr" > 76 < / span > < span class = "muComment" > # update loop state< / span >
< span id = "L77" class = "LineNr" > 77 < / span > c < span class = "Special" > < -< / span > shift-right < span class = "Constant" > 6< / span >
< span id = "L78" class = "LineNr" > 78 < / span > num-trailers < span class = "Special" > < -< / span > decrement
< span id = "L79" class = "LineNr" > 79 < / span > < span class = "PreProc" > loop< / span >
< span id = "L80" class = "LineNr" > 80 < / span > < span class = "Delimiter" > }< / span >
< span id = "L81" class = "LineNr" > 81 < / span > < span class = "muComment" > # emit engine< / span >
< span id = "L82" class = "LineNr" > 82 < / span > result < span class = "Special" > < -< / span > shift-left < span class = "Constant" > 8< / span >
< span id = "L83" class = "LineNr" > 83 < / span > result < span class = "Special" > < -< / span > or c
< span id = "L84" class = "LineNr" > 84 < / span > result < span class = "Special" > < -< / span > or first
< span id = "L85" class = "LineNr" > 85 < / span > < span class = "muComment" > #< / span >
< span id = "L86" class = "LineNr" > 86 < / span > < span class = "PreProc" > return< / span > result
< span id = "L87" class = "LineNr" > 87 < / span > < span class = "Delimiter" > }< / span >
< span id = "L88" class = "LineNr" > 88 < / span >
< span id = "L89" class = "LineNr" > 89 < / span > < span class = "muComment" > # TODO: bring in tests once we have check-ints-equal< / span >
< span id = "L90" class = "LineNr" > 90 < / span >
< span id = "L91" class = "LineNr" > 91 < / span > < span class = "muComment" > # read the next grapheme from a stream of bytes< / span >
2021-06-16 04:50:13 +00:00
< span id = "L92" class = "LineNr" > 92 < / span > < span class = "PreProc" > fn< / span > < span class = "muFunction" > < a href = '403unicode.mu.html#L92' > read-grapheme< / a > < / span > in: (addr stream byte)< span class = "PreProc" > -> < / span > _/< span class = "muRegEax" > eax< / span > : grapheme < span class = "Delimiter" > {< / span >
2021-03-24 00:31:08 +00:00
< span id = "L93" class = "LineNr" > 93 < / span > < span class = "muComment" > # if at eof, return EOF< / span >
< span id = "L94" class = "LineNr" > 94 < / span > < span class = "Delimiter" > {< / span >
2021-06-16 04:50:13 +00:00
< span id = "L95" class = "LineNr" > 95 < / span > < span class = "PreProc" > var< / span > eof?/< span class = "muRegEax" > eax< / span > : boolean < span class = "Special" > < -< / span > < a href = '309stream.subx.html#L6' > stream-empty?< / a > in
2021-03-24 00:31:08 +00:00
< span id = "L96" class = "LineNr" > 96 < / span > compare eof?, < span class = "Constant" > 0< / span > /false
< span id = "L97" class = "LineNr" > 97 < / span > < span class = "PreProc" > break-if-=< / span >
< span id = "L98" class = "LineNr" > 98 < / span > < span class = "PreProc" > return< / span > < span class = "Constant" > 0xffffffff< / span >
< span id = "L99" class = "LineNr" > 99 < / span > < span class = "Delimiter" > }< / span >
2021-06-16 04:50:13 +00:00
< span id = "L100" class = "LineNr" > 100 < / span > < span class = "PreProc" > var< / span > c/< span class = "muRegEax" > eax< / span > : byte < span class = "Special" > < -< / span > < a href = '112read-byte.subx.html#L13' > read-byte< / a > in
< span id = "L101" class = "LineNr" > 101 < / span > < span class = "PreProc" > var< / span > num-trailers/< span class = "muRegEcx" > ecx< / span > : int < span class = "Special" > < -< / span > copy < span class = "Constant" > 0< / span >
2021-03-24 00:31:08 +00:00
< span id = "L102" class = "LineNr" > 102 < / span > $read-grapheme:compute-length: < span class = "Delimiter" > {< / span >
< span id = "L103" class = "LineNr" > 103 < / span > < span class = "muComment" > # single byte: just return it< / span >
< span id = "L104" class = "LineNr" > 104 < / span > compare c, < span class = "Constant" > 0xc0< / span >
< span id = "L105" class = "LineNr" > 105 < / span > < span class = "Delimiter" > {< / span >
< span id = "L106" class = "LineNr" > 106 < / span > < span class = "PreProc" > break-if-> =< / span >
2021-06-16 04:50:13 +00:00
< span id = "L107" class = "LineNr" > 107 < / span > < span class = "PreProc" > var< / span > g/< span class = "muRegEax" > eax< / span > : grapheme < span class = "Special" > < -< / span > copy c
2021-03-24 00:31:08 +00:00
< span id = "L108" class = "LineNr" > 108 < / span > < span class = "PreProc" > return< / span > g
< span id = "L109" class = "LineNr" > 109 < / span > < span class = "Delimiter" > }< / span >
< span id = "L110" class = "LineNr" > 110 < / span > compare c, < span class = "Constant" > 0xfe< / span >
< span id = "L111" class = "LineNr" > 111 < / span > < span class = "Delimiter" > {< / span >
< span id = "L112" class = "LineNr" > 112 < / span > < span class = "PreProc" > break-if-< < / span >
2021-06-16 04:50:13 +00:00
< span id = "L113" class = "LineNr" > 113 < / span > < span class = "PreProc" > var< / span > g/< span class = "muRegEax" > eax< / span > : grapheme < span class = "Special" > < -< / span > copy c
2021-03-24 00:31:08 +00:00
< span id = "L114" class = "LineNr" > 114 < / span > < span class = "PreProc" > return< / span > g
< span id = "L115" class = "LineNr" > 115 < / span > < span class = "Delimiter" > }< / span >
< span id = "L116" class = "LineNr" > 116 < / span > < span class = "muComment" > # 2 bytes< / span >
< span id = "L117" class = "LineNr" > 117 < / span > compare c, < span class = "Constant" > 0xe0< / span >
< span id = "L118" class = "LineNr" > 118 < / span > < span class = "Delimiter" > {< / span >
< span id = "L119" class = "LineNr" > 119 < / span > < span class = "PreProc" > break-if-> =< / span >
< span id = "L120" class = "LineNr" > 120 < / span > num-trailers < span class = "Special" > < -< / span > copy < span class = "Constant" > 1< / span >
< span id = "L121" class = "LineNr" > 121 < / span > < span class = "PreProc" > break< / span > $read-grapheme:compute-length
< span id = "L122" class = "LineNr" > 122 < / span > < span class = "Delimiter" > }< / span >
< span id = "L123" class = "LineNr" > 123 < / span > < span class = "muComment" > # 3 bytes< / span >
< span id = "L124" class = "LineNr" > 124 < / span > compare c, < span class = "Constant" > 0xf0< / span >
< span id = "L125" class = "LineNr" > 125 < / span > < span class = "Delimiter" > {< / span >
< span id = "L126" class = "LineNr" > 126 < / span > < span class = "PreProc" > break-if-> =< / span >
< span id = "L127" class = "LineNr" > 127 < / span > num-trailers < span class = "Special" > < -< / span > copy < span class = "Constant" > 2< / span >
< span id = "L128" class = "LineNr" > 128 < / span > < span class = "PreProc" > break< / span > $read-grapheme:compute-length
< span id = "L129" class = "LineNr" > 129 < / span > < span class = "Delimiter" > }< / span >
< span id = "L130" class = "LineNr" > 130 < / span > < span class = "muComment" > # 4 bytes< / span >
< span id = "L131" class = "LineNr" > 131 < / span > compare c, < span class = "Constant" > 0xf8< / span >
< span id = "L132" class = "LineNr" > 132 < / span > < span class = "Delimiter" > {< / span >
< span id = "L133" class = "LineNr" > 133 < / span > < span class = "PreProc" > break-if-> =< / span >
< span id = "L134" class = "LineNr" > 134 < / span > num-trailers < span class = "Special" > < -< / span > copy < span class = "Constant" > 3< / span >
< span id = "L135" class = "LineNr" > 135 < / span > < span class = "PreProc" > break< / span > $read-grapheme:compute-length
< span id = "L136" class = "LineNr" > 136 < / span > < span class = "Delimiter" > }< / span >
< span id = "L137" class = "LineNr" > 137 < / span > < span class = "muComment" > # TODO: print error message< / span >
< span id = "L138" class = "LineNr" > 138 < / span > < span class = "PreProc" > return< / span > < span class = "Constant" > 0< / span >
< span id = "L139" class = "LineNr" > 139 < / span > < span class = "Delimiter" > }< / span >
< span id = "L140" class = "LineNr" > 140 < / span > < span class = "muComment" > # prepend trailer bytes< / span >
2021-06-16 04:50:13 +00:00
< span id = "L141" class = "LineNr" > 141 < / span > < span class = "PreProc" > var< / span > result/< span class = "muRegEdi" > edi< / span > : grapheme < span class = "Special" > < -< / span > copy c
< span id = "L142" class = "LineNr" > 142 < / span > < span class = "PreProc" > var< / span > num-byte-shifts/< span class = "muRegEdx" > edx< / span > : int < span class = "Special" > < -< / span > copy < span class = "Constant" > 1< / span >
2021-03-24 00:31:08 +00:00
< span id = "L143" class = "LineNr" > 143 < / span > < span class = "Delimiter" > {< / span >
< span id = "L144" class = "LineNr" > 144 < / span > compare num-trailers, < span class = "Constant" > 0< / span >
< span id = "L145" class = "LineNr" > 145 < / span > < span class = "PreProc" > break-if-< =< / span >
2021-06-16 04:50:13 +00:00
< span id = "L146" class = "LineNr" > 146 < / span > < span class = "PreProc" > var< / span > tmp/< span class = "muRegEax" > eax< / span > : byte < span class = "Special" > < -< / span > < a href = '112read-byte.subx.html#L13' > read-byte< / a > in
< span id = "L147" class = "LineNr" > 147 < / span > < span class = "PreProc" > var< / span > tmp2/< span class = "muRegEax" > eax< / span > : int < span class = "Special" > < -< / span > copy tmp
2021-03-24 00:31:08 +00:00
< span id = "L148" class = "LineNr" > 148 < / span > tmp2 < span class = "Special" > < -< / span > < a href = '403unicode.mu.html#L159' > shift-left-bytes< / a > tmp2, num-byte-shifts
< span id = "L149" class = "LineNr" > 149 < / span > result < span class = "Special" > < -< / span > or tmp2
< span id = "L150" class = "LineNr" > 150 < / span > < span class = "muComment" > # update loop state< / span >
< span id = "L151" class = "LineNr" > 151 < / span > num-byte-shifts < span class = "Special" > < -< / span > increment
< span id = "L152" class = "LineNr" > 152 < / span > num-trailers < span class = "Special" > < -< / span > decrement
< span id = "L153" class = "LineNr" > 153 < / span > < span class = "PreProc" > loop< / span >
< span id = "L154" class = "LineNr" > 154 < / span > < span class = "Delimiter" > }< / span >
< span id = "L155" class = "LineNr" > 155 < / span > < span class = "PreProc" > return< / span > result
< span id = "L156" class = "LineNr" > 156 < / span > < span class = "Delimiter" > }< / span >
< span id = "L157" class = "LineNr" > 157 < / span >
< span id = "L158" class = "LineNr" > 158 < / span > < span class = "muComment" > # needed because available primitives only shift by a literal/constant number of bits< / span >
2021-06-16 04:50:13 +00:00
< span id = "L159" class = "LineNr" > 159 < / span > < span class = "PreProc" > fn< / span > < span class = "muFunction" > < a href = '403unicode.mu.html#L159' > shift-left-bytes< / a > < / span > n: int, k: int< span class = "PreProc" > -> < / span > _/< span class = "muRegEax" > eax< / span > : int < span class = "Delimiter" > {< / span >
< span id = "L160" class = "LineNr" > 160 < / span > < span class = "PreProc" > var< / span > i/< span class = "muRegEcx" > ecx< / span > : int < span class = "Special" > < -< / span > copy < span class = "Constant" > 0< / span >
< span id = "L161" class = "LineNr" > 161 < / span > < span class = "PreProc" > var< / span > result/< span class = "muRegEax" > eax< / span > : int < span class = "Special" > < -< / span > copy n
2021-03-24 00:31:08 +00:00
< span id = "L162" class = "LineNr" > 162 < / span > < span class = "Delimiter" > {< / span >
< span id = "L163" class = "LineNr" > 163 < / span > compare i, k
< span id = "L164" class = "LineNr" > 164 < / span > < span class = "PreProc" > break-if-> =< / span >
< span id = "L165" class = "LineNr" > 165 < / span > compare i, < span class = "Constant" > 4< / span > < span class = "muComment" > # only 4 bytes in 32 bits< / span >
< span id = "L166" class = "LineNr" > 166 < / span > < span class = "PreProc" > break-if-> =< / span >
< span id = "L167" class = "LineNr" > 167 < / span > result < span class = "Special" > < -< / span > shift-left < span class = "Constant" > 8< / span >
< span id = "L168" class = "LineNr" > 168 < / span > i < span class = "Special" > < -< / span > increment
< span id = "L169" class = "LineNr" > 169 < / span > < span class = "PreProc" > loop< / span >
< span id = "L170" class = "LineNr" > 170 < / span > < span class = "Delimiter" > }< / span >
< span id = "L171" class = "LineNr" > 171 < / span > < span class = "PreProc" > return< / span > result
< span id = "L172" class = "LineNr" > 172 < / span > < span class = "Delimiter" > }< / span >
< span id = "L173" class = "LineNr" > 173 < / span >
< span id = "L174" class = "LineNr" > 174 < / span > < span class = "muComment" > # write a grapheme to a stream of bytes< / span >
< span id = "L175" class = "LineNr" > 175 < / span > < span class = "muComment" > # this is like write-to-stream, except we skip leading 0 bytes< / span >
< span id = "L176" class = "LineNr" > 176 < / span > < span class = "PreProc" > fn< / span > < span class = "muFunction" > < a href = '403unicode.mu.html#L176' > write-grapheme< / a > < / span > out: (addr stream byte), g: grapheme < span class = "Delimiter" > {< / span >
< span id = "L177" class = "LineNr" > 177 < / span > $write-grapheme:body: < span class = "Delimiter" > {< / span >
2021-06-16 04:50:13 +00:00
< span id = "L178" class = "LineNr" > 178 < / span > < span class = "PreProc" > var< / span > c/< span class = "muRegEax" > eax< / span > : int < span class = "Special" > < -< / span > copy g
2021-03-24 00:31:08 +00:00
< span id = "L179" class = "LineNr" > 179 < / span > < a href = '115write-byte.subx.html#L12' > append-byte< / a > out, c < span class = "muComment" > # first byte is always written< / span >
< span id = "L180" class = "LineNr" > 180 < / span > c < span class = "Special" > < -< / span > shift-right < span class = "Constant" > 8< / span >
< span id = "L181" class = "LineNr" > 181 < / span > compare c, < span class = "Constant" > 0< / span >
< span id = "L182" class = "LineNr" > 182 < / span > < span class = "PreProc" > break-if-=< / span > $write-grapheme:body
< span id = "L183" class = "LineNr" > 183 < / span > < a href = '115write-byte.subx.html#L12' > append-byte< / a > out, c
< span id = "L184" class = "LineNr" > 184 < / span > c < span class = "Special" > < -< / span > shift-right < span class = "Constant" > 8< / span >
< span id = "L185" class = "LineNr" > 185 < / span > compare c, < span class = "Constant" > 0< / span >
< span id = "L186" class = "LineNr" > 186 < / span > < span class = "PreProc" > break-if-=< / span > $write-grapheme:body
< span id = "L187" class = "LineNr" > 187 < / span > < a href = '115write-byte.subx.html#L12' > append-byte< / a > out, c
< span id = "L188" class = "LineNr" > 188 < / span > c < span class = "Special" > < -< / span > shift-right < span class = "Constant" > 8< / span >
< span id = "L189" class = "LineNr" > 189 < / span > compare c, < span class = "Constant" > 0< / span >
< span id = "L190" class = "LineNr" > 190 < / span > < span class = "PreProc" > break-if-=< / span > $write-grapheme:body
< span id = "L191" class = "LineNr" > 191 < / span > < a href = '115write-byte.subx.html#L12' > append-byte< / a > out, c
< span id = "L192" class = "LineNr" > 192 < / span > < span class = "Delimiter" > }< / span >
< span id = "L193" class = "LineNr" > 193 < / span > < span class = "Delimiter" > }< / span >
2020-09-07 23:38:14 +00:00
< / pre >
< / body >
< / html >
<!-- vim: set foldmethod=manual : -->