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function lcs(a,b){
var l = new Array();
for(var i = -1; i < a.length; i++)
l[i] = new Array();
for(var i = -1; i < a.length; i++)
l[i][-1] = 0;
for(var j = -1; j < b.length; j++)
l[-1][j] = 0;
for(var i = 0; i < a.length; i++)
for(var j = 0; j < b.length; j++)
if (a[i] == b[j])
l[i][j] = l[i-1][j-1] + 1;
else
l[i][j] = Math.max(l[i-1][j], l[i][j-1]);
var r = [];
var i = a.length, j = b.length;
while (i > 0 && j > 0) {
i--;
j--;
if (a[i] == b[j])
r.unshift(a[i]);
else if (l[i][j-1] > l[i-1][j])
i++;
else
j++;
}
return r;
}
function parseFile(fileName, parser) {
var req = new XMLHttpRequest();
req.onreadystatechange = function() {
if(req.readyState == 4)
parser(req.responseText);
}
req.open("GET", fileName);
req.send(null);
}
function getFile(fileName) {
var req = new XMLHttpRequest();
req.open("GET", fileName, false);
req.send(null);
return req.responseText;
}
function parsePublic(target) {
var mainLines = getFile(target).split('/* DIFFTABLE */')[1].split('\n');
var fileNames = new Array();
var privateFilesRE = new RegExp('#include "simpleops/(.*\.h)"');
for(var i = 0; i < mainLines.length; i++)
if(privateFilesRE.test(mainLines[i]))
fileNames.push(privateFilesRE.exec(mainLines[i])[1]);
return fileNames;
}
function addRow(table, row) {
var tr = table.insertRow(-1);
for(var j = 0; j < row.length; j++) {
var cell = tr.insertCell(-1);
cell.setAttribute("class", row[j].getAttribute("class"));
cell.appendChild(row[j]);
}
}
function createPre(x, cls) {
var node = document.createElement('pre');
node.setAttribute("class", cls);
node.appendChild(document.createTextNode(x));
return node;
}
function diffNode(x) {
return createPre(x, "diff");
}
function emptyNode() {
return createPre("", "empty");
}
function equalNode(x) {
return createPre(x, "equal");
}
function multidiff(diffTable, target) {
var sourceNames = parsePublic(target);
var sourceLines = new Array();
var idx = new Array();
var ref;
for(var i = 0; i < sourceNames.length; i++) {
var data = getFile(sourceNames[i]);
var lines = data.split('\n');
sourceLines.push(lines);
idx.push(0);
if(i == 0)
ref = lines;
else
ref = lcs(ref, lines);
}
for(var refidx = 0; refidx < ref.length; refidx++) {
while (true) {
var matching = true;
var line = new Array();
for(var j = 0; j < sourceLines.length; j++)
if (ref[refidx] != sourceLines[j][idx[j]]) {
matching = false;
line.push(diffNode(sourceLines[j][idx[j]++]));
} else {
line.push(emptyNode());
}
if (matching)
break;
else
addRow(diffTable, line);
}
var line = new Array();
for(var j = 0; j < sourceLines.length; j++)
line.push(equalNode(sourceLines[j][idx[j]++]));
addRow(diffTable, line);
}
while (true) {
var complete = true;
var line = new Array();
for(var j = 0; j < sourceLines.length; j++)
if (idx[j] < sourceLines[j].length) {
complete = false;
line.push(diffNode(sourceLines[j][idx[j]++]));
} else {
line.push(emptyNode());
}
if (complete)
break;
else
addRow(diffTable, line);
}
var tr = diffTable.createTHead().insertRow(0);
for(var j = 0; j < sourceNames.length; j++) {
var td = tr.insertCell(j);
var text = document.createTextNode(sourceNames[j]);
td.appendChild(text);
}
}
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