about summary refs log blame commit diff stats
path: root/algorithms/java/DFS.java
blob: e0da6810ef72e915267ccf2f11ea731a10efe37f (plain) (tree)
1
2
3
4
5
6
7
8
9
10
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>pre { line-height: 125%; }
td.linenos .normal { color: inherit; background-color: transparent; padding-left: 5px; padding-right: 5px; }
span.linenos { color: inherit; background-color: transparent; padding-left: 5px; padding-right: 5px; }
td.linenos .special { color: #000000; background-color: #ffffc0; padding-left: 5px; padding-right: 5px; }
span.linenos.special { color: #000000; background-color: #ffffc0; padding-left: 5px; padding-right: 5px; }
.highlight .hll { background-color: #ffffcc }
.highlight .c { color: #888888 } /* Comment */
.highlight .err { color: #a61717; background-color: #e3d2d2 } /* Error */
.highlight .k { color: #008800; font-weight: bold } /* Keyword */
.highlight .ch { color: #888888 } /* Comment.Hashbang */
.highlight .cm { color: #888888 } /* Comment.Multiline */
.highlight .cp { color: #cc0000; font-weight: bold } /* Comment.Preproc */
.highlight .cpf { color: #888888 } /* Comment.PreprocFile */
.highlight .c1 { color: #888888 } /* Comment.Single */
.highlight .cs { color: #cc0000; font-weight: bold; background-color: #fff0f0 } /* Comment.Special */
.highlight .gd { color: #000000; background-color: #ffdddd } /* Generic.Deleted */
.highlight .ge { font-style: italic } /* Generic.Emph */
.highlight .ges { font-weight: bold; font-style: italic } /* Generic.EmphStrong */
.highlight .gr { color: #aa0000 } /* Generic.Error */
.highlight .gh { color: #333333 } /* Generic.Heading */
.highlight .gi { color: #000000; background-color: #ddffdd } /* Generic.Inserted */
.highlight .go { color: #888888 } /* Generic.Output */
.highlight .gp { color: #555555 } /* Generic.Prompt */
.highlight .gs { font-weight: bold } /* Generic.Strong */
.highlight .gu { color: #666666 } /* Generic.Subheading */
.highlight .gt { color: #aa0000 } /* Generic.Traceback */
.highlight .kc { color: #008800; font-weight: bold } /* Keyword.Constant */
.highlight .kd { color: #008800; font-weight: bold } /* Keyword.Declaration */
.highlight .kn { color: #008800; font-weight: bold } /* Keyword.Namespace */
.highlight .kp { color: #008800 } /* Keyword.Pseudo */
.highlight .kr { color: #008800; font-weight: bold } /* Keyword.Reserved */
.highlight .kt { color: #888888; font-weight: bold } /* Keyword.Type */
.highlight .m { color: #0000DD; font-weight: bold } /* Literal.Number */
.highlight .s { color: #dd2200; background-color: #fff0f0 } /* Literal.String */
.highlight .na { color: #336699 } /* Name.Attribute */
.highlight .nb { color: #003388 } /* Name.Builtin */
.highlight .nc { color: #bb0066; font-weight: bold } /* Name.Class */
.highlight .no { color: #003366; font-weight: bold } /* Name.Constant */
.highlight .nd { color: #555555 } /* Name.Decorator */
.highlight .ne { color: #bb0066; font-weight: bold } /* Name.Exception */
.highlight .nf { color: #0066bb; font-weight: bold } /* Name.Function */
.highlight .nl { color: #336699; font-style: italic } /* Name.Label */
.highlight .nn { color: #bb0066; font-weight: bold } /* Name.Namespace */
.highlight .py { color: #336699; font-weight: bold } /* Name.Property */
.highlight .nt { color: #bb0066; font-weight: bold } /* Name.Tag */
.highlight .nv { color: #336699 } /* Name.Variable */
.highlight .ow { color: #008800 } /* Operator.Word */
.highlight .w { color: #bbbbbb } /* Text.Whitespace */
.highlight .mb { color: #0000DD; font-weight: bold } /* Literal.Number.Bin */
.highlight .mf { color: #0000DD; font-weight: bold } /* Literal.Number.Float */
.highlight .mh { color: #0000DD; font-weight: bold } /* Literal.Number.Hex */
.highlight .mi { color: #0000DD; font-weight: bold } /* Literal.Number.Integer */
.highlight .mo { color: #0000DD; font-weight: bold } /* Literal.Number.Oct */
.highlight .sa { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Affix */
.highlight .sb { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Backtick */
.highlight .sc { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Char */
.highlight .dl { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Delimiter */
.highlight .sd { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Doc */
.highlight .s2 { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Double */
.highlight .se { color: #0044dd; background-color: #fff0f0 } /* Literal.String.Escape */
.highlight .sh { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Heredoc */
.highlight .si { color: #3333bb; background-color: #fff0f0 } /* Literal.String.Interpol */
.highlight .sx { color: #22bb22; background-color: #f0fff0 } /* Literal.String.Other */
.highlight .sr { color: #008800; background-color: #fff0ff } /* Literal.String.Regex */
.highlight .s1 { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Single */
.highlight .ss { color: #aa6600; background-color: #fff0f0 } /* Literal.String.Symbol */
.highlight .bp { color: #003388 } /* Name.Builtin.Pseudo */
.highlight .fm { color: #0066bb; font-weight: bold } /* Name.Function.Magic */
.highlight .vc { color: #336699 } /* Name.Variable.Class */
.highlight .vg { color: #dd7700 } /* Name.Variable.Global */
.highlight .vi { color: #3333bb } /* Name.Variable.Instance */
.highlight .vm { color: #336699 } /* Name.Variable.Magic */
.highlight .il { color: #0000DD; font-weight: bold } /* Literal.Number.Integer.Long */
import java.util.Arrays;
import java.util.Collections;
import java.util.List;

public class DFS {
    static int[][] directions = new int[][]{
        {+0, +1}, // Right.
        {+1, +0}, // Down.
        {+0, -1}, // Left.
        {-1, +0}, // Up.
    };

    static void traverse(int x, int y, char[][] maze, boolean[][] visited) {
        // Move in random direction.
        List<Integer> l = Arrays.asList(new Integer[]{0, 1, 2, 3});
        Collections.shuffle(l);

        for (int i: l) {
            int curx = x + directions[i][0];
            int cury = y + directions[i][1];

            // Out of bounds check.
            if (curx < 0 || cury < 0
                || curx > maze.length - 1 || cury > maze[0].length - 1)
                continue;

            if (visited[curx][cury])
                continue;

            // Marker cells.
            if (maze[curx][cury] == '$')
                System.out.print("|");
            else if (maze[curx][cury] == '#')
                System.out.print("!");

            // Print the maze on every iteration.
            for(int j = 0; j < maze.length; j++)
                for(int k = 0; k < maze[j].length; k++)
                    if (j == curx && k == cury)
                        System.out.print("@");
                    else
                        System.out.print(visited[j][k] ? "-" : maze[j][k]);
            System.out.println();

            // Found a solution, exiting.
            if (maze[curx][cury] == '$')
                System.exit(0);

            if (maze[curx][cury] == '.') {
                visited[curx][cury] = true;
                traverse(curx, cury, maze, visited);
                visited[curx][cury] = false;
            }
        }
    }

    public static void main(String[] args) {
        char[][] maze = {
            {'.', '#', '.', '#', '.', '.', '#', '.'},
            {'.', '.', '.', '.', '.', '.', '.', '.'},
            {'.', '#', '.', '.', '#', '.', '.', '$'},
            {'.', '.', '.', '#', '.', '#', '.', '.'},
            {'.', '.', '.', '.', '.', '.', '.', '#'},
            {'.', '#', '#', '.', '.', '.', '#', '.'},
            {'.', '.', '.', '.', '.', '.', '.', '.'},
        };

        boolean[][] visited = new boolean[maze.length][maze[0].length];

        for (int i = 0; i < maze.length; i++)
            for (int j = 0; j < maze[i].length; j++)
                visited[i][j] = false;

        System.out.println(String.format("rows:%d cols:%d", maze.length, maze[0].length));

        // Print the maze.
        for(int j = 0; j < maze.length; j++)
            for(int k = 0; k < maze[j].length; k++)
                    System.out.print(maze[j][k]);
        System.out.println();

        // Start at 0,0.
        visited[0][0] = true;
        traverse(0, 0, maze, visited);
    }
}
ass="p"></span> <span class="subxComment"># copy *(ebp+12) to eax</span> <span id="L29" class="LineNr"> 29 </span> c1/shift 5/subop/logic-right 3/mod/direct 0/rm32/eax <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/imm8 <span class="subxComment"># shift eax right by 4 bits, while padding zeroes</span> <span id="L30" class="LineNr"> 30 </span> 25/and-eax 0xf/imm32 <span id="L31" class="LineNr"> 31 </span> <span class="subxS1Comment"># . AL = to-hex-char(AL)</span> <span id="L32" class="LineNr"> 32 </span> e8/call <a href='117write-int-hex.subx.html#L9'>to-hex-char</a>/disp32 <span id="L33" class="LineNr"> 33 </span> <span class="subxComment"># append-byte(f, AL)</span> <span id="L34" class="LineNr"> 34 </span> <span class="subxS2Comment"># . . push args</span> <span id="L35" class="LineNr"> 35 </span> 50/push-eax <span id="L36" class="LineNr"> 36 </span> ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 8/disp8 <span class="Normal"> . </span> <span class="subxComment"># push *(ebp+8)</span> <span id="L37" class="LineNr"> 37 </span> <span class="subxS2Comment"># . . call</span> <span id="L38" class="LineNr"> 38 </span> e8/call <a href='115write-byte.subx.html#L208'>append-byte</a>/disp32 <span id="L39" class="LineNr"> 39 </span> <span class="subxS2Comment"># . . discard args</span> <span id="L40" class="LineNr"> 40 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 8/imm32 <span class="subxComment"># add to esp</span> <span id="L41" class="LineNr"> 41 </span> <span class="subxComment"># AL = convert lower nibble to hex</span> <span id="L42" class="LineNr"> 42 </span> 8b/copy 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0/r32/eax 0xc/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy *(ebp+12) to eax</span> <span id="L43" class="LineNr"> 43 </span> 25/and-eax 0xf/imm32 <span id="L44" class="LineNr"> 44 </span> <span class="subxS1Comment"># . AL = to-hex-char(AL)</span> <span id="L45" class="LineNr"> 45 </span> e8/call <a href='117write-int-hex.subx.html#L9'>to-hex-char</a>/disp32 <span id="L46" class="LineNr"> 46 </span> <span class="subxComment"># append-byte(f, AL)</span> <span id="L47" class="LineNr"> 47 </span> <span class="subxS2Comment"># . . push args</span> <span id="L48" class="LineNr"> 48 </span> 50/push-eax <span id="L49" class="LineNr"> 49 </span> ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 8/disp8 <span class="Normal"> . </span> <span class="subxComment"># push *(ebp+8)</span> <span id="L50" class="LineNr"> 50 </span> <span class="subxS2Comment"># . . call</span> <span id="L51" class="LineNr"> 51 </span> e8/call <a href='115write-byte.subx.html#L208'>append-byte</a>/disp32 <span id="L52" class="LineNr"> 52 </span> <span class="subxS2Comment"># . . discard args</span> <span id="L53" class="LineNr"> 53 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 8/imm32 <span class="subxComment"># add to esp</span> <span id="L54" class="LineNr"> 54 </span><span class="Constant">$append-byte-hex:end</span>: <span id="L55" class="LineNr"> 55 </span> <span class="subxS1Comment"># . restore registers</span> <span id="L56" class="LineNr"> 56 </span> 58/pop-to-eax <span id="L57" class="LineNr"> 57 </span> <span class="subxS1Comment"># . epilogue</span> <span id="L58" class="LineNr"> 58 </span> 89/copy 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 5/r32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy ebp to esp</span> <span id="L59" class="LineNr"> 59 </span> 5d/pop-to-ebp <span id="L60" class="LineNr"> 60 </span> c3/return <span id="L61" class="LineNr"> 61 </span> <span id="L62" class="LineNr"> 62 </span><span class="subxTest">test-append-byte-hex</span>: <span id="L63" class="LineNr"> 63 </span> <span class="subxH1Comment"># - check that append-byte-hex adds the hex textual representation</span> <span id="L64" class="LineNr"> 64 </span> <span class="subxComment"># setup</span> <span id="L65" class="LineNr"> 65 </span> <span class="subxS1Comment"># . clear-stream(_test-stream)</span> <span id="L66" class="LineNr"> 66 </span> <span class="subxS2Comment"># . . push args</span> <span id="L67" class="LineNr"> 67 </span> 68/push <a href='108write.subx.html#L151'>_test-stream</a>/imm32 <span id="L68" class="LineNr"> 68 </span> <span class="subxS2Comment"># . . call</span> <span id="L69" class="LineNr"> 69 </span> e8/call <a href='106stream.subx.html#L17'>clear-stream</a>/disp32 <span id="L70" class="LineNr"> 70 </span> <span class="subxS2Comment"># . . discard args</span> <span id="L71" class="LineNr"> 71 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/imm32 <span class="subxComment"># add to esp</span> <span id="L72" class="LineNr"> 72 </span> <span class="subxComment"># append-byte-hex(_test-stream, 0xa) # exercises digit, non-digit as well as leading zero</span> <span id="L73" class="LineNr"> 73 </span> <span class="subxS2Comment"># . . push args</span> <span id="L74" class="LineNr"> 74 </span> 68/push 0xa/imm32 <span id="L75" class="LineNr"> 75 </span> 68/push <a href='108write.subx.html#L151'>_test-stream</a>/imm32 <span id="L76" class="LineNr"> 76 </span> <span class="subxS2Comment"># . . call</span> <span id="L77" class="LineNr"> 77 </span> e8/call <a href='117write-int-hex.subx.html#L21'>append-byte-hex</a>/disp32 <span id="L78" class="LineNr"> 78 </span> <span class="subxS2Comment"># . . discard args</span> <span id="L79" class="LineNr"> 79 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 8/imm32 <span class="subxComment"># add to esp</span> <span id="L80" class="LineNr"> 80 </span> <span class="subxComment"># check-stream-equal(_test-stream, &quot;0a&quot;, msg)</span> <span id="L81" class="LineNr"> 81 </span> <span class="subxS2Comment"># . . push args</span> <span id="L82" class="LineNr"> 82 </span> 68/push <span class="Constant">&quot;F - test-append-byte-hex&quot;</span>/imm32 <span id="L83" class="LineNr"> 83 </span> 68/push <span class="Constant">&quot;0a&quot;</span>/imm32 <span id="L84" class="LineNr"> 84 </span> 68/push <a href='108write.subx.html#L151'>_test-stream</a>/imm32 <span id="L85" class="LineNr"> 85 </span> <span class="subxS2Comment"># . . call</span> <span id="L86" class="LineNr"> 86 </span> e8/call <a href='109stream-equal.subx.html#L194'>check-stream-equal</a>/disp32 <span id="L87" class="LineNr"> 87 </span> <span class="subxS2Comment"># . . discard args</span> <span id="L88" class="LineNr"> 88 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0xc/imm32 <span class="subxComment"># add to esp</span> <span id="L89" class="LineNr"> 89 </span> <span class="subxS1Comment"># . end</span> <span id="L90" class="LineNr"> 90 </span> c3/return <span id="L91" class="LineNr"> 91 </span> <span id="L92" class="LineNr"> 92 </span><span class="subxComment"># print the hex representation for the lowest byte of a number</span> <span id="L93" class="LineNr"> 93 </span><span class="subxFunction">write-byte-hex-buffered</span>: <span class="subxComment"># f: (addr buffered-file), n: int</span> <span id="L94" class="LineNr"> 94 </span> <span class="subxS1Comment"># . prologue</span> <span id="L95" class="LineNr"> 95 </span> 55/push-ebp <span id="L96" class="LineNr"> 96 </span> 89/copy 3/mod/direct 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/r32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy esp to ebp</span> <span id="L97" class="LineNr"> 97 </span> <span class="subxS1Comment"># . save registers</span> <span id="L98" class="LineNr"> 98 </span> 50/push-eax <span id="L99" class="LineNr"> 99 </span> <span class="subxComment"># AL = convert upper nibble to hex</span> <span id="L100" class="LineNr">100 </span> 8b/copy 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0/r32/eax 0xc/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy *(ebp+12) to eax</span> <span id="L101" class="LineNr">101 </span> c1/shift 5/subop/logic-right 3/mod/direct 0/rm32/eax <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/imm8 <span class="subxComment"># shift eax right by 4 bits, while padding zeroes</span> <span id="L102" class="LineNr">102 </span> 25/and-eax 0xf/imm32 <span id="L103" class="LineNr">103 </span> <span class="subxS1Comment"># . AL = to-hex-char(AL)</span> <span id="L104" class="LineNr">104 </span> e8/call <a href='117write-int-hex.subx.html#L9'>to-hex-char</a>/disp32 <span id="L105" class="LineNr">105 </span> <span class="subxComment"># write-byte-buffered(f, AL)</span> <span id="L106" class="LineNr">106 </span> <span class="subxS2Comment"># . . push args</span> <span id="L107" class="LineNr">107 </span> 50/push-eax <span id="L108" class="LineNr">108 </span> ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 8/disp8 <span class="Normal"> . </span> <span class="subxComment"># push *(ebp+8)</span> <span id="L109" class="LineNr">109 </span> <span class="subxS2Comment"># . . call</span> <span id="L110" class="LineNr">110 </span> e8/call <a href='115write-byte.subx.html#L33'>write-byte-buffered</a>/disp32 <span id="L111" class="LineNr">111 </span> <span class="subxS2Comment"># . . discard args</span> <span id="L112" class="LineNr">112 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 8/imm32 <span class="subxComment"># add to esp</span> <span id="L113" class="LineNr">113 </span> <span class="subxComment"># AL = convert lower nibble to hex</span> <span id="L114" class="LineNr">114 </span> 8b/copy 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0/r32/eax 0xc/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy *(ebp+12) to eax</span> <span id="L115" class="LineNr">115 </span> 25/and-eax 0xf/imm32 <span id="L116" class="LineNr">116 </span> <span class="subxS1Comment"># . AL = to-hex-char(AL)</span> <span id="L117" class="LineNr">117 </span> e8/call <a href='117write-int-hex.subx.html#L9'>to-hex-char</a>/disp32 <span id="L118" class="LineNr">118 </span> <span class="subxComment"># write-byte-buffered(f, AL)</span> <span id="L119" class="LineNr">119 </span> <span class="subxS2Comment"># . . push args</span> <span id="L120" class="LineNr">120 </span> 50/push-eax <span id="L121" class="LineNr">121 </span> ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 8/disp8 <span class="Normal"> . </span> <span class="subxComment"># push *(ebp+8)</span> <span id="L122" class="LineNr">122 </span> <span class="subxS2Comment"># . . call</span> <span id="L123" class="LineNr">123 </span> e8/call <a href='115write-byte.subx.html#L33'>write-byte-buffered</a>/disp32 <span id="L124" class="LineNr">124 </span> <span class="subxS2Comment"># . . discard args</span> <span id="L125" class="LineNr">125 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 8/imm32 <span class="subxComment"># add to esp</span> <span id="L126" class="LineNr">126 </span><span class="Constant">$write-byte-hex-buffered:end</span>: <span id="L127" class="LineNr">127 </span> <span class="subxS1Comment"># . restore registers</span> <span id="L128" class="LineNr">128 </span> 58/pop-to-eax <span id="L129" class="LineNr">129 </span> <span class="subxS1Comment"># . epilogue</span> <span id="L130" class="LineNr">130 </span> 89/copy 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 5/r32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy ebp to esp</span> <span id="L131" class="LineNr">131 </span> 5d/pop-to-ebp <span id="L132" class="LineNr">132 </span> c3/return <span id="L133" class="LineNr">133 </span> <span id="L134" class="LineNr">134 </span><span class="subxTest">test-write-byte-hex-buffered</span>: <span id="L135" class="LineNr">135 </span> <span class="subxH1Comment"># - check that write-byte-hex-buffered prints the hex textual representation</span> <span id="L136" class="LineNr">136 </span> <span class="subxComment"># setup</span> <span id="L137" class="LineNr">137 </span> <span class="subxS1Comment"># . clear-stream(_test-stream)</span> <span id="L138" class="LineNr">138 </span> <span class="subxS2Comment"># . . push args</span> <span id="L139" class="LineNr">139 </span> 68/push <a href='108write.subx.html#L151'>_test-stream</a>/imm32 <span id="L140" class="LineNr">140 </span> <span class="subxS2Comment"># . . call</span> <span id="L141" class="LineNr">141 </span> e8/call <a href='106stream.subx.html#L17'>clear-stream</a>/disp32 <span id="L142" class="LineNr">142 </span> <span class="subxS2Comment"># . . discard args</span> <span id="L143" class="LineNr">143 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/imm32 <span class="subxComment"># add to esp</span> <span id="L144" class="LineNr">144 </span> <span class="subxS1Comment"># . clear-stream($_test-buffered-file-&gt;buffer)</span> <span id="L145" class="LineNr">145 </span> <span class="subxS2Comment"># . . push args</span> <span id="L146" class="LineNr">146 </span> 68/push $_test-buffered-file-&gt;buffer/imm32 <span id="L147" class="LineNr">147 </span> <span class="subxS2Comment"># . . call</span> <span id="L148" class="LineNr">148 </span> e8/call <a href='106stream.subx.html#L17'>clear-stream</a>/disp32 <span id="L149" class="LineNr">149 </span> <span class="subxS2Comment"># . . discard args</span> <span id="L150" class="LineNr">150 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/imm32 <span class="subxComment"># add to esp</span> <span id="L151" class="LineNr">151 </span> <span class="subxComment"># write-byte-hex-buffered(_test-buffered-file, 0xa) # exercises digit, non-digit as well as leading zero</span> <span id="L152" class="LineNr">152 </span> <span class="subxS2Comment"># . . push args</span> <span id="L153" class="LineNr">153 </span> 68/push 0xa/imm32 <span id="L154" class="LineNr">154 </span> 68/push <a href='112read-byte.subx.html#L318'>_test-buffered-file</a>/imm32 <span id="L155" class="LineNr">155 </span> <span class="subxS2Comment"># . . call</span> <span id="L156" class="LineNr">156 </span> e8/call <a href='117write-int-hex.subx.html#L93'>write-byte-hex-buffered</a>/disp32 <span id="L157" class="LineNr">157 </span> <span class="subxS2Comment"># . . discard args</span> <span id="L158" class="LineNr">158 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 8/imm32 <span class="subxComment"># add to esp</span> <span id="L159" class="LineNr">159 </span> <span class="subxComment"># flush(_test-buffered-file)</span> <span id="L160" class="LineNr">160 </span> <span class="subxS2Comment"># . . push args</span> <span id="L161" class="LineNr">161 </span> 68/push <a href='112read-byte.subx.html#L318'>_test-buffered-file</a>/imm32 <span id="L162" class="LineNr">162 </span> <span class="subxS2Comment"># . . call</span> <span id="L163" class="LineNr">163 </span> e8/call <a href='115write-byte.subx.html#L81'>flush</a>/disp32 <span id="L164" class="LineNr">164 </span> <span class="subxS2Comment"># . . discard args</span> <span id="L165" class="LineNr">165 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/imm32 <span class="subxComment"># add to esp</span> <span id="L166" class="LineNr">166 </span> <span class="subxComment"># check-stream-equal(_test-stream, &quot;0a&quot;, msg)</span> <span id="L167" class="LineNr">167 </span> <span class="subxS2Comment"># . . push args</span> <span id="L168" class="LineNr">168 </span> 68/push <span class="Constant">&quot;F - test-write-byte-hex-buffered&quot;</span>/imm32 <span id="L169" class="LineNr">169 </span> 68/push <span class="Constant">&quot;0a&quot;</span>/imm32 <span id="L170" class="LineNr">170 </span> 68/push <a href='108write.subx.html#L151'>_test-stream</a>/imm32 <span id="L171" class="LineNr">171 </span> <span class="subxS2Comment"># . . call</span> <span id="L172" class="LineNr">172 </span> e8/call <a href='109stream-equal.subx.html#L194'>check-stream-equal</a>/disp32 <span id="L173" class="LineNr">173 </span> <span class="subxS2Comment"># . . discard args</span> <span id="L174" class="LineNr">174 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0xc/imm32 <span class="subxComment"># add to esp</span> <span id="L175" class="LineNr">175 </span> <span class="subxS1Comment"># . end</span> <span id="L176" class="LineNr">176 </span> c3/return <span id="L177" class="LineNr">177 </span> <span id="L178" class="LineNr">178 </span><span class="subxFunction">write-int32-hex</span>: <span class="subxComment"># f: (addr stream byte), n: int</span> <span id="L179" class="LineNr">179 </span> <span class="subxS1Comment"># . prologue</span> <span id="L180" class="LineNr">180 </span> 55/push-ebp <span id="L181" class="LineNr">181 </span> 89/copy 3/mod/direct 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/r32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy esp to ebp</span> <span id="L182" class="LineNr">182 </span><span class="Constant">$write-int32-hex:hex-prefix</span>: <span id="L183" class="LineNr">183 </span> <span class="subxComment"># write(f, &quot;0x&quot;)</span> <span id="L184" class="LineNr">184 </span> <span class="subxS2Comment"># . . push args</span> <span id="L185" class="LineNr">185 </span> 68/push <span class="Constant">&quot;0x&quot;</span>/imm32 <span id="L186" class="LineNr">186 </span> ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 8/disp8 <span class="Normal"> . </span> <span class="subxComment"># push *(ebp+8)</span> <span id="L187" class="LineNr">187 </span> <span class="subxS2Comment"># . . call</span> <span id="L188" class="LineNr">188 </span> e8/call <a href='108write.subx.html#L24'>write</a>/disp32 <span id="L189" class="LineNr">189 </span> <span class="subxS2Comment"># . . discard args</span> <span id="L190" class="LineNr">190 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 8/imm32 <span class="subxComment"># add to esp</span> <span id="L191" class="LineNr">191 </span><span class="Constant">$write-int32-hex:rest</span>: <span id="L192" class="LineNr">192 </span> <span class="subxComment"># write-int32-hex-bits(f, n, 32)</span> <span id="L193" class="LineNr">193 </span> <span class="subxS2Comment"># . . push args</span> <span id="L194" class="LineNr">194 </span> 68/push 0x20/imm32 <span id="L195" class="LineNr">195 </span> ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0xc/disp8 <span class="Normal"> . </span> <span class="subxComment"># push *(ebp+12)</span> <span id="L196" class="LineNr">196 </span> ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 8/disp8 <span class="Normal"> . </span> <span class="subxComment"># push *(ebp+8)</span> <span id="L197" class="LineNr">197 </span> <span class="subxS2Comment"># . . call</span> <span id="L198" class="LineNr">198 </span> e8/call <a href='117write-int-hex.subx.html#L209'>write-int32-hex-bits</a>/disp32 <span id="L199" class="LineNr">199 </span> <span class="subxS2Comment"># . . discard args</span> <span id="L200" class="LineNr">200 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0xc/imm32 <span class="subxComment"># add to esp</span> <span id="L201" class="LineNr">201 </span><span class="Constant">$write-int32-hex:end</span>: <span id="L202" class="LineNr">202 </span> <span class="subxS1Comment"># . epilogue</span> <span id="L203" class="LineNr">203 </span> 89/copy 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 5/r32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy ebp to esp</span> <span id="L204" class="LineNr">204 </span> 5d/pop-to-ebp <span id="L205" class="LineNr">205 </span> c3/return <span id="L206" class="LineNr">206 </span> <span id="L207" class="LineNr">207 </span><span class="subxComment"># print rightmost 'bits' of 'n'</span> <span id="L208" class="LineNr">208 </span><span class="subxComment"># bits must be multiple of 4</span> <span id="L209" class="LineNr">209 </span><span class="subxFunction">write-int32-hex-bits</span>: <span class="subxComment"># f: (addr stream byte), n: int, bits: int</span> <span id="L210" class="LineNr">210 </span> <span class="subxComment"># pseudocode:</span> <span id="L211" class="LineNr">211 </span> <span class="subxComment"># bits -= 4</span> <span id="L212" class="LineNr">212 </span> <span class="subxComment"># while true</span> <span id="L213" class="LineNr">213 </span> <span class="subxComment"># if (bits &lt; 0) break</span> <span id="L214" class="LineNr">214 </span> <span class="subxComment"># eax = n &gt;&gt; bits</span> <span id="L215" class="LineNr">215 </span> <span class="subxComment"># eax = eax &amp; 0xf</span> <span id="L216" class="LineNr">216 </span> <span class="subxComment"># append-byte(f, AL)</span> <span id="L217" class="LineNr">217 </span> <span class="subxComment"># bits -= 4</span> <span id="L218" class="LineNr">218 </span> <span class="subxComment">#</span> <span id="L219" class="LineNr">219 </span> <span class="subxS1Comment"># . prologue</span> <span id="L220" class="LineNr">220 </span> 55/push-ebp <span id="L221" class="LineNr">221 </span> 89/copy 3/mod/direct 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/r32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy esp to ebp</span> <span id="L222" class="LineNr">222 </span> <span class="subxS1Comment"># . save registers</span> <span id="L223" class="LineNr">223 </span> 50/push-eax <span id="L224" class="LineNr">224 </span> 51/push-ecx <span id="L225" class="LineNr">225 </span> <span class="subxComment"># ecx = bits-4</span> <span id="L226" class="LineNr">226 </span> 8b/copy 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 1/r32/ecx 0x10/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy *(ebp+16) to ecx</span> <span id="L227" class="LineNr">227 </span> 81 5/subop/subtract 3/mod/direct 1/rm32/ecx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/imm32 <span class="subxComment"># subtract from ecx</span> <span id="L228" class="LineNr">228 </span><span class="Constant">$write-int32-hex-bits:loop</span>: <span id="L229" class="LineNr">229 </span> <span class="subxComment"># if (bits &lt; 0) break</span> <span id="L230" class="LineNr">230 </span> 81 7/subop/compare 3/mod/direct 1/rm32/ecx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0/imm32 <span class="subxComment"># compare ecx</span> <span id="L231" class="LineNr">231 </span> 7c/jump-if-&lt; $write-int32-hex-bits:end/disp8 <span id="L232" class="LineNr">232 </span> <span class="subxComment"># eax = n &gt;&gt; bits</span> <span id="L233" class="LineNr">233 </span> 8b/copy 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0/r32/eax 0xc/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy *(ebp+12) to eax</span> <span id="L234" class="LineNr">234 </span> d3/&gt;&gt;ecx 5/subop/pad-zeroes 3/mod/direct 0/rm32/eax <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># shift eax right by ecx bits, padding zeroes</span> <span id="L235" class="LineNr">235 </span> <span class="subxComment"># eax = to-hex-char(AL)</span> <span id="L236" class="LineNr">236 </span> 25/and-eax 0xf/imm32 <span id="L237" class="LineNr">237 </span> e8/call <a href='117write-int-hex.subx.html#L9'>to-hex-char</a>/disp32 <span id="L238" class="LineNr">238 </span> <span class="subxComment"># append-byte(f, AL)</span> <span id="L239" class="LineNr">239 </span> <span class="subxS2Comment"># . . push args</span> <span id="L240" class="LineNr">240 </span> 50/push-eax <span id="L241" class="LineNr">241 </span> ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 8/disp8 <span class="Normal"> . </span> <span class="subxComment"># push *(ebp+8)</span> <span id="L242" class="LineNr">242 </span> <span class="subxS2Comment"># . . call</span> <span id="L243" class="LineNr">243 </span> e8/call <a href='115write-byte.subx.html#L208'>append-byte</a>/disp32 <span id="L244" class="LineNr">244 </span> <span class="subxS2Comment"># . . discard args</span> <span id="L245" class="LineNr">245 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 8/imm32 <span class="subxComment"># add to esp</span> <span id="L246" class="LineNr">246 </span> <span class="subxComment"># bits -= 4</span> <span id="L247" class="LineNr">247 </span> 81 5/subop/subtract 3/mod/direct 1/rm32/ecx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/imm32 <span class="subxComment"># subtract from ecx</span> <span id="L248" class="LineNr">248 </span> eb/jump $write-int32-hex-bits:<span class="Constant">loop</span>/disp8 <span id="L249" class="LineNr">249 </span><span class="Constant">$write-int32-hex-bits:end</span>: <span id="L250" class="LineNr">250 </span> <span class="subxS1Comment"># . restore registers</span> <span id="L251" class="LineNr">251 </span> 59/pop-to-ecx <span id="L252" class="LineNr">252 </span> 58/pop-to-eax <span id="L253" class="LineNr">253 </span> <span class="subxS1Comment"># . epilogue</span> <span id="L254" class="LineNr">254 </span> 89/copy 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 5/r32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy ebp to esp</span> <span id="L255" class="LineNr">255 </span> 5d/pop-to-ebp <span id="L256" class="LineNr">256 </span> c3/return <span id="L257" class="LineNr">257 </span> <span id="L258" class="LineNr">258 </span><span class="subxTest">test-write-int32-hex</span>: <span id="L259" class="LineNr">259 </span> <span class="subxH1Comment"># - check that write-int32-hex prints the hex textual representation</span> <span id="L260" class="LineNr">260 </span> <span class="subxComment"># setup</span> <span id="L261" class="LineNr">261 </span> <span class="subxS1Comment"># . clear-stream(_test-stream)</span> <span id="L262" class="LineNr">262 </span> <span class="subxS2Comment"># . . push args</span> <span id="L263" class="LineNr">263 </span> 68/push <a href='108write.subx.html#L151'>_test-stream</a>/imm32 <span id="L264" class="LineNr">264 </span> <span class="subxS2Comment"># . . call</span> <span id="L265" class="LineNr">265 </span> e8/call <a href='106stream.subx.html#L17'>clear-stream</a>/disp32 <span id="L266" class="LineNr">266 </span> <span class="subxS2Comment"># . . discard args</span> <span id="L267" class="LineNr">267 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/imm32 <span class="subxComment"># add to esp</span> <span id="L268" class="LineNr">268 </span> <span class="subxComment"># write-int32-hex(_test-stream, 0x8899aa)</span> <span id="L269" class="LineNr">269 </span> <span class="subxS2Comment"># . . push args</span> <span id="L270" class="LineNr">270 </span> 68/push 0x8899aa/imm32 <span id="L271" class="LineNr">271 </span> 68/push <a href='108write.subx.html#L151'>_test-stream</a>/imm32 <span id="L272" class="LineNr">272 </span> <span class="subxS2Comment"># . . call</span> <span id="L273" class="LineNr">273 </span> e8/call <a href='117write-int-hex.subx.html#L178'>write-int32-hex</a>/disp32 <span id="L274" class="LineNr">274 </span> <span class="subxS2Comment"># . . discard args</span> <span id="L275" class="LineNr">275 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 8/imm32 <span class="subxComment"># add to esp</span> <span id="L276" class="LineNr">276 </span> <span class="subxComment"># check-stream-equal(_test-stream, &quot;0x008899aa&quot;, msg)</span> <span id="L277" class="LineNr">277 </span> <span class="subxS2Comment"># . . push args</span> <span id="L278" class="LineNr">278 </span> 68/push <span class="Constant">&quot;F - test-write-int32-hex&quot;</span>/imm32 <span id="L279" class="LineNr">279 </span> 68/push <span class="Constant">&quot;0x008899aa&quot;</span>/imm32 <span id="L280" class="LineNr">280 </span> 68/push <a href='108write.subx.html#L151'>_test-stream</a>/imm32 <span id="L281" class="LineNr">281 </span> <span class="subxS2Comment"># . . call</span> <span id="L282" class="LineNr">282 </span> e8/call <a href='109stream-equal.subx.html#L194'>check-stream-equal</a>/disp32 <span id="L283" class="LineNr">283 </span> <span class="subxS2Comment"># . . discard args</span> <span id="L284" class="LineNr">284 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0xc/imm32 <span class="subxComment"># add to esp</span> <span id="L285" class="LineNr">285 </span> <span class="subxS1Comment"># . end</span> <span id="L286" class="LineNr">286 </span> c3/return <span id="L287" class="LineNr">287 </span> <span id="L288" class="LineNr">288 </span><span class="subxFunction">write-int32-hex-buffered</span>: <span class="subxComment"># f: (addr buffered-file), n: int</span> <span id="L289" class="LineNr">289 </span> <span class="subxS1Comment"># . prologue</span> <span id="L290" class="LineNr">290 </span> 55/push-ebp <span id="L291" class="LineNr">291 </span> 89/copy 3/mod/direct 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/r32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy esp to ebp</span> <span id="L292" class="LineNr">292 </span><span class="Constant">$write-int32-hex-buffered:hex-prefix</span>: <span id="L293" class="LineNr">293 </span> <span class="subxComment"># write-buffered(f, &quot;0x&quot;)</span> <span id="L294" class="LineNr">294 </span> <span class="subxS2Comment"># . . push args</span> <span id="L295" class="LineNr">295 </span> 68/push <span class="Constant">&quot;0x&quot;</span>/imm32 <span id="L296" class="LineNr">296 </span> ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 8/disp8 <span class="Normal"> . </span> <span class="subxComment"># push *(ebp+8)</span> <span id="L297" class="LineNr">297 </span> <span class="subxS2Comment"># . . call</span> <span id="L298" class="LineNr">298 </span> e8/call <a href='116write-buffered.subx.html#L8'>write-buffered</a>/disp32 <span id="L299" class="LineNr">299 </span> <span class="subxS2Comment"># . . discard args</span> <span id="L300" class="LineNr">300 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 8/imm32 <span class="subxComment"># add to esp</span> <span id="L301" class="LineNr">301 </span><span class="Constant">$write-int32-hex-buffered:rest</span>: <span id="L302" class="LineNr">302 </span> <span class="subxComment"># write-int32-hex-bits-buffered(f, n, 32)</span> <span id="L303" class="LineNr">303 </span> <span class="subxS2Comment"># . . push args</span> <span id="L304" class="LineNr">304 </span> 68/push 0x20/imm32 <span id="L305" class="LineNr">305 </span> ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0xc/disp8 <span class="Normal"> . </span> <span class="subxComment"># push *(ebp+12)</span> <span id="L306" class="LineNr">306 </span> ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 8/disp8 <span class="Normal"> . </span> <span class="subxComment"># push *(ebp+8)</span> <span id="L307" class="LineNr">307 </span> <span class="subxS2Comment"># . . call</span> <span id="L308" class="LineNr">308 </span> e8/call <a href='117write-int-hex.subx.html#L319'>write-int32-hex-bits-buffered</a>/disp32 <span id="L309" class="LineNr">309 </span> <span class="subxS2Comment"># . . discard args</span> <span id="L310" class="LineNr">310 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0xc/imm32 <span class="subxComment"># add to esp</span> <span id="L311" class="LineNr">311 </span><span class="Constant">$write-int32-hex-buffered:end</span>: <span id="L312" class="LineNr">312 </span> <span class="subxS1Comment"># . epilogue</span> <span id="L313" class="LineNr">313 </span> 89/copy 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 5/r32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy ebp to esp</span> <span id="L314" class="LineNr">314 </span> 5d/pop-to-ebp <span id="L315" class="LineNr">315 </span> c3/return <span id="L316" class="LineNr">316 </span> <span id="L317" class="LineNr">317 </span><span class="subxComment"># print rightmost 'bits' of 'n'</span> <span id="L318" class="LineNr">318 </span><span class="subxComment"># bits must be multiple of 4</span> <span id="L319" class="LineNr">319 </span><span class="subxFunction">write-int32-hex-bits-buffered</span>: <span class="subxComment"># f: (addr buffered-file), n: int, bits: int</span> <span id="L320" class="LineNr">320 </span> <span class="subxComment"># pseudocode:</span> <span id="L321" class="LineNr">321 </span> <span class="subxComment"># bits -= 4</span> <span id="L322" class="LineNr">322 </span> <span class="subxComment"># while true</span> <span id="L323" class="LineNr">323 </span> <span class="subxComment"># if (bits &lt; 0) break</span> <span id="L324" class="LineNr">324 </span> <span class="subxComment"># eax = n &gt;&gt; bits</span> <span id="L325" class="LineNr">325 </span> <span class="subxComment"># eax = eax &amp; 0xf</span> <span id="L326" class="LineNr">326 </span> <span class="subxComment"># write-byte-buffered(f, AL)</span> <span id="L327" class="LineNr">327 </span> <span class="subxComment"># bits -= 4</span> <span id="L328" class="LineNr">328 </span> <span class="subxComment">#</span> <span id="L329" class="LineNr">329 </span> <span class="subxS1Comment"># . prologue</span> <span id="L330" class="LineNr">330 </span> 55/push-ebp <span id="L331" class="LineNr">331 </span> 89/copy 3/mod/direct 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/r32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy esp to ebp</span> <span id="L332" class="LineNr">332 </span> <span class="subxS1Comment"># . save registers</span> <span id="L333" class="LineNr">333 </span> 50/push-eax <span id="L334" class="LineNr">334 </span> 51/push-ecx <span id="L335" class="LineNr">335 </span> <span class="subxComment"># ecx = bits-4</span> <span id="L336" class="LineNr">336 </span> 8b/copy 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 1/r32/ecx 0x10/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy *(ebp+16) to ecx</span> <span id="L337" class="LineNr">337 </span> 81 5/subop/subtract 3/mod/direct 1/rm32/ecx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/imm32 <span class="subxComment"># subtract from ecx</span> <span id="L338" class="LineNr">338 </span><span class="Constant">$write-int32-hex-bits-buffered:loop</span>: <span id="L339" class="LineNr">339 </span> <span class="subxComment"># if (bits &lt; 0) break</span> <span id="L340" class="LineNr">340 </span> 81 7/subop/compare 3/mod/direct 1/rm32/ecx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0/imm32 <span class="subxComment"># compare ecx</span> <span id="L341" class="LineNr">341 </span> 7c/jump-if-&lt; $write-int32-hex-bits-buffered:end/disp8 <span id="L342" class="LineNr">342 </span> <span class="subxComment"># eax = n &gt;&gt; bits</span> <span id="L343" class="LineNr">343 </span> 8b/copy 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0/r32/eax 0xc/disp8 <span class="Normal"> . </span> <span class="subxComment"># copy *(ebp+12) to eax</span> <span id="L344" class="LineNr">344 </span> d3/&gt;&gt;ecx 5/subop/pad-zeroes 3/mod/direct 0/rm32/eax <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># shift eax right by ecx bits, padding zeroes</span> <span id="L345" class="LineNr">345 </span> <span class="subxComment"># eax = to-hex-char(AL)</span> <span id="L346" class="LineNr">346 </span> 25/and-eax 0xf/imm32 <span id="L347" class="LineNr">347 </span> e8/call <a href='117write-int-hex.subx.html#L9'>to-hex-char</a>/disp32 <span id="L348" class="LineNr">348 </span> <span class="subxComment"># write-byte-buffered(f, AL)</span> <span id="L349" class="LineNr">349 </span> <span class="subxS2Comment"># . . push args</span> <span id="L350" class="LineNr">350 </span> 50/push-eax <span id="L351" class="LineNr">351 </span> ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 8/disp8 <span class="Normal"> . </span> <span class="subxComment"># push *(ebp+8)</span> <span id="L352" class="LineNr">352 </span> <span class="subxS2Comment"># . . call</span> <span id="L353" class="LineNr">353 </span> e8/call <a href='115write-byte.subx.html#L33'>write-byte-buffered</a>/disp32 <span id="L354" class="LineNr">354 </span> <span class="subxS2Comment"># . . discard args</span> <span id="L355" class="LineNr">355 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 8/imm32 <span class="subxComment"># add to esp</span> <span id="L356" class="LineNr">356 </span> <span class="subxComment"># bits -= 4</span> <span id="L357" class="LineNr">357 </span> 81 5/subop/subtract 3/mod/direct 1/rm32/ecx <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/imm32 <span class="subxComment"># subtract from ecx</span> <span id="L358" class="LineNr">358 </span> eb/jump $write-int32-hex-bits-buffered:<span class="Constant">loop</span>/disp8 <span id="L359" class="LineNr">359 </span><span class="Constant">$write-int32-hex-bits-buffered:end</span>: <span id="L360" class="LineNr">360 </span> <span class="subxS1Comment"># . restore registers</span> <span id="L361" class="LineNr">361 </span> 59/pop-to-ecx <span id="L362" class="LineNr">362 </span> 58/pop-to-eax <span id="L363" class="LineNr">363 </span> <span class="subxS1Comment"># . epilogue</span> <span id="L364" class="LineNr">364 </span> 89/copy 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 5/r32/ebp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="subxComment"># copy ebp to esp</span> <span id="L365" class="LineNr">365 </span> 5d/pop-to-ebp <span id="L366" class="LineNr">366 </span> c3/return <span id="L367" class="LineNr">367 </span> <span id="L368" class="LineNr">368 </span><span class="subxTest">test-write-int32-hex-buffered</span>: <span id="L369" class="LineNr">369 </span> <span class="subxH1Comment"># - check that write-int32-hex-buffered prints the hex textual representation</span> <span id="L370" class="LineNr">370 </span> <span class="subxComment"># setup</span> <span id="L371" class="LineNr">371 </span> <span class="subxS1Comment"># . clear-stream(_test-stream)</span> <span id="L372" class="LineNr">372 </span> <span class="subxS2Comment"># . . push args</span> <span id="L373" class="LineNr">373 </span> 68/push <a href='108write.subx.html#L151'>_test-stream</a>/imm32 <span id="L374" class="LineNr">374 </span> <span class="subxS2Comment"># . . call</span> <span id="L375" class="LineNr">375 </span> e8/call <a href='106stream.subx.html#L17'>clear-stream</a>/disp32 <span id="L376" class="LineNr">376 </span> <span class="subxS2Comment"># . . discard args</span> <span id="L377" class="LineNr">377 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/imm32 <span class="subxComment"># add to esp</span> <span id="L378" class="LineNr">378 </span> <span class="subxS1Comment"># . clear-stream($_test-buffered-file-&gt;buffer)</span> <span id="L379" class="LineNr">379 </span> <span class="subxS2Comment"># . . push args</span> <span id="L380" class="LineNr">380 </span> 68/push $_test-buffered-file-&gt;buffer/imm32 <span id="L381" class="LineNr">381 </span> <span class="subxS2Comment"># . . call</span> <span id="L382" class="LineNr">382 </span> e8/call <a href='106stream.subx.html#L17'>clear-stream</a>/disp32 <span id="L383" class="LineNr">383 </span> <span class="subxS2Comment"># . . discard args</span> <span id="L384" class="LineNr">384 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/imm32 <span class="subxComment"># add to esp</span> <span id="L385" class="LineNr">385 </span> <span class="subxComment"># write-int32-hex-buffered(_test-buffered-file, 0x8899aa)</span> <span id="L386" class="LineNr">386 </span> <span class="subxS2Comment"># . . push args</span> <span id="L387" class="LineNr">387 </span> 68/push 0x8899aa/imm32 <span id="L388" class="LineNr">388 </span> 68/push <a href='112read-byte.subx.html#L318'>_test-buffered-file</a>/imm32 <span id="L389" class="LineNr">389 </span> <span class="subxS2Comment"># . . call</span> <span id="L390" class="LineNr">390 </span> e8/call <a href='117write-int-hex.subx.html#L288'>write-int32-hex-buffered</a>/disp32 <span id="L391" class="LineNr">391 </span> <span class="subxS2Comment"># . . discard args</span> <span id="L392" class="LineNr">392 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 8/imm32 <span class="subxComment"># add to esp</span> <span id="L393" class="LineNr">393 </span> <span class="subxComment"># flush(_test-buffered-file)</span> <span id="L394" class="LineNr">394 </span> <span class="subxS2Comment"># . . push args</span> <span id="L395" class="LineNr">395 </span> 68/push <a href='112read-byte.subx.html#L318'>_test-buffered-file</a>/imm32 <span id="L396" class="LineNr">396 </span> <span class="subxS2Comment"># . . call</span> <span id="L397" class="LineNr">397 </span> e8/call <a href='115write-byte.subx.html#L81'>flush</a>/disp32 <span id="L398" class="LineNr">398 </span> <span class="subxS2Comment"># . . discard args</span> <span id="L399" class="LineNr">399 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 4/imm32 <span class="subxComment"># add to esp</span> <span id="L400" class="Folded">400 </span><span class="Folded">+-- 18 lines: #? # dump line --------------------------------------------------------------------------------------------------------------------------------------------------------</span> <span id="L418" class="LineNr">418 </span> <span class="subxComment"># check-stream-equal(_test-stream, &quot;0x008899aa&quot;, msg)</span> <span id="L419" class="LineNr">419 </span> <span class="subxS2Comment"># . . push args</span> <span id="L420" class="LineNr">420 </span> 68/push <span class="Constant">&quot;F - test-write-int32-hex-buffered&quot;</span>/imm32 <span id="L421" class="LineNr">421 </span> 68/push <span class="Constant">&quot;0x008899aa&quot;</span>/imm32 <span id="L422" class="LineNr">422 </span> 68/push <a href='108write.subx.html#L151'>_test-stream</a>/imm32 <span id="L423" class="LineNr">423 </span> <span class="subxS2Comment"># . . call</span> <span id="L424" class="LineNr">424 </span> e8/call <a href='109stream-equal.subx.html#L194'>check-stream-equal</a>/disp32 <span id="L425" class="LineNr">425 </span> <span class="subxS2Comment"># . . discard args</span> <span id="L426" class="LineNr">426 </span> 81 0/subop/add 3/mod/direct 4/rm32/esp <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> <span class="Normal"> . </span> 0xc/imm32 <span class="subxComment"># add to esp</span> <span id="L427" class="LineNr">427 </span> <span class="subxS1Comment"># . end</span> <span id="L428" class="LineNr">428 </span> c3/return <span id="L429" class="LineNr">429 </span> <span id="L430" class="LineNr">430 </span><span class="subxS2Comment"># . . vim&#0058;nowrap:textwidth=0</span> </pre> </body> </html> <!-- vim: set foldmethod=manual : -->