<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>Mu - linux/apps/parse-int.mu</title> <meta name="Generator" content="Vim/8.2"> <meta name="plugin-version" content="vim8.1_v2"> <meta name="syntax" content="none"> <meta name="settings" content="number_lines,use_css,pre_wrap,no_foldcolumn,expand_tabs,line_ids,prevent_copy=,use_input_for_pc=fallback"> <meta name="colorscheme" content="minimal-light"> <style> <!-- pre { white-space: pre-wrap; font-family: monospace; color: #000000; background-color: #ffffd7; } body { font-size:12pt; font-family: monospace; color: #000000; background-color: #ffffd7; } a { color:inherit; } * { font-size:12pt; font-size: 1em; } .PreProc { color: #c000c0; } .muRegEcx { color: #870000; } .Special { color: #ff6060; } .LineNr { } .muRegEsi { color: #005faf; } .muRegEdi { color: #00af00; } .Constant { color: #008787; } .muFunction { color: #af5f00; text-decoration: underline; } .Delimiter { color: #c000c0; } .muComment { color: #005faf; } .muRegEdx { color: #af5f00; } .muRegEbx { color: #5f00ff; } --> </style> <script> <!-- /* 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();'> <a href='https://github.com/akkartik/mu/blob/main/linux/apps/parse-int.mu'>https://github.com/akkartik/mu/blob/main/linux/apps/parse-int.mu</a> <pre id='vimCodeElement'> <span id="L1" class="LineNr"> 1 </span><span class="muComment"># parse a decimal int at the commandline</span> <span id="L2" class="LineNr"> 2 </span><span class="muComment">#</span> <span id="L3" class="LineNr"> 3 </span><span class="muComment"># To run:</span> <span id="L4" class="LineNr"> 4 </span><span class="muComment"># $ ./translate apps/parse-int.mu</span> <span id="L5" class="LineNr"> 5 </span><span class="muComment"># $ ./a.elf 123</span> <span id="L6" class="LineNr"> 6 </span><span class="muComment"># $ echo $?</span> <span id="L7" class="LineNr"> 7 </span><span class="muComment"># 123</span> <span id="L8" class="LineNr"> 8 </span> <span id="L9" class="LineNr"> 9 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='parse-int.mu.html#L9'>main</a></span> _args: (addr array addr array byte)<span class="PreProc"> -> </span>_/<span class="muRegEbx">ebx</span>: int <span class="Delimiter">{</span> <span id="L10" class="LineNr">10 </span> <span class="muComment"># if no args, print a message and exit</span> <span id="L11" class="LineNr">11 </span> <span class="PreProc">var</span> args/<span class="muRegEsi">esi</span>: (addr array addr array byte) <span class="Special"><-</span> copy _args <span id="L12" class="LineNr">12 </span> <span class="PreProc">var</span> n/<span class="muRegEcx">ecx</span>: int <span class="Special"><-</span> length args <span id="L13" class="LineNr">13 </span> compare n, <span class="Constant">1</span> <span id="L14" class="LineNr">14 </span> <span class="Delimiter">{</span> <span id="L15" class="LineNr">15 </span> <span class="PreProc">break-if-></span> <span id="L16" class="LineNr">16 </span> <a href='../405screen.mu.html#L169'>print-string</a> <span class="Constant">0</span>/screen, <span class="Constant">"usage: <a href='parse-int.mu.html#L25'>parse-int</a> <integer>\n"</span> <span id="L17" class="LineNr">17 </span> <span class="PreProc">return</span> <span class="Constant">1</span> <span id="L18" class="LineNr">18 </span> <span class="Delimiter">}</span> <span id="L19" class="LineNr">19 </span> <span class="muComment"># otherwise parse the first arg as an integer</span> <span id="L20" class="LineNr">20 </span> <span class="PreProc">var</span> in/<span class="muRegEcx">ecx</span>: (addr addr array byte) <span class="Special"><-</span> index args, <span class="Constant">1</span> <span id="L21" class="LineNr">21 </span> <span class="PreProc">var</span> out/eax: int <span class="Special"><-</span> <a href='parse-int.mu.html#L25'>parse-int</a> *in <span id="L22" class="LineNr">22 </span> <span class="PreProc">return</span> out <span id="L23" class="LineNr">23 </span><span class="Delimiter">}</span> <span id="L24" class="LineNr">24 </span> <span id="L25" class="LineNr">25 </span><span class="PreProc">fn</span> <span class="muFunction"><a href='parse-int.mu.html#L25'>parse-int</a></span> _in: (addr array byte)<span class="PreProc"> -> </span>_/eax: int <span class="Delimiter">{</span> <span id="L26" class="LineNr">26 </span> <span class="PreProc">var</span> in/<span class="muRegEsi">esi</span>: (addr array byte) <span class="Special"><-</span> copy _in <span id="L27" class="LineNr">27 </span> <span class="PreProc">var</span> len/<span class="muRegEdx">edx</span>: int <span class="Special"><-</span> length in <span id="L28" class="LineNr">28 </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="L29" class="LineNr">29 </span> <span class="PreProc">var</span> result/<span class="muRegEdi">edi</span>: int <span class="Special"><-</span> copy <span class="Constant">0</span> <span id="L30" class="LineNr">30 </span> <span class="Delimiter">{</span> <span id="L31" class="LineNr">31 </span> compare i, len <span id="L32" class="LineNr">32 </span> <span class="PreProc">break-if->=</span> <span id="L33" class="LineNr">33 </span> <span class="muComment"># result *= 10</span> <span id="L34" class="LineNr">34 </span> <span class="PreProc">var</span> ten/eax: int <span class="Special"><-</span> copy <span class="Constant">0xa</span> <span id="L35" class="LineNr">35 </span> result <span class="Special"><-</span> multiply ten <span id="L36" class="LineNr">36 </span> <span class="muComment"># c = in[i]</span> <span id="L37" class="LineNr">37 </span> <span class="PreProc">var</span> tmp/<span class="muRegEbx">ebx</span>: (addr byte) <span class="Special"><-</span> index in, i <span id="L38" class="LineNr">38 </span> <span class="PreProc">var</span> c/eax: byte <span class="Special"><-</span> copy-byte *tmp <span id="L39" class="LineNr">39 </span> <span class="muComment">#</span> <span id="L40" class="LineNr">40 </span> <span class="PreProc">var</span> g/eax: grapheme <span class="Special"><-</span> copy c <span id="L41" class="LineNr">41 </span> <span class="PreProc">var</span> digit/eax: int <span class="Special"><-</span> <a href='../126write-int-decimal.subx.html#L405'>to-decimal-digit</a> g <span id="L42" class="LineNr">42 </span> result <span class="Special"><-</span> add digit <span id="L43" class="LineNr">43 </span> i <span class="Special"><-</span> increment <span id="L44" class="LineNr">44 </span> <span class="PreProc">loop</span> <span id="L45" class="LineNr">45 </span> <span class="Delimiter">}</span> <span id="L46" class="LineNr">46 </span> <span class="PreProc">return</span> result <span id="L47" class="LineNr">47 </span><span class="Delimiter">}</span> </pre> </body> </html> <!-- vim: set foldmethod=manual : -->