Initial commit

js/dllpatcher.js

@@ -0,0 +1,156 @@
+dllFile = null;
+mods = null;
+filename = null;
+errorLog = "";
+
+DllPatcher = function(fname, args) {
+    mods = args;
+    filename = fname;
+    loadPatchUI();
+};
+
+loadFile = function(file) {
+    var reader = new FileReader();
+
+    reader.onload = function(e) {
+        dllFile = new Uint8Array(e.target.result);
+        if(validatePatches()) {
+            $("#success").removeClass("hidden");
+            $("#success").html("DLL loaded successfully!");
+        } else {
+            $("#success").addClass("hidden");
+        }
+        $('#error').html(errorLog);
+        updatePatchUI();
+    };
+
+    reader.readAsArrayBuffer(file);
+};
+
+saveDll = function() {
+    if(!dllFile || !mods || !filename)
+        return;
+    var fname = filename;
+    
+    for(var i = 0; i < mods.length; i++) {
+        id = mods[i].shortname;
+        var enabled = document.getElementById(id).checked;
+        replaceAll(dllFile, mods[i].patches, enabled);
+        if(enabled) {
+            fname += '-' + id;
+        }
+    }
+    fname += '.dll';
+    
+    var blob = new Blob([dllFile], {type: "application/octet-stream"});
+    saveAs(blob, fname);
+}
+
+loadPatchUI = function() {
+    var patchDiv = $('#patches');
+    for(var i = 0; i < mods.length; i++) {
+        var id = mods[i].shortname;
+        var name = mods[i].name;
+        patchDiv.append('<div class="patch"><input type="checkbox" id="' + id + '"><label for="' + id + '">' + name + '</label></div>');
+    }
+}
+
+updatePatchUI = function() {
+    for(var i = 0; i < mods.length; i++) {
+        var id = mods[i].shortname;
+        var elem = document.getElementById(id);
+        elem.checked = checkPatchBytes(mods[i].patches) == "on";
+    }
+}
+
+buildError = function(patchName, message) {
+    var msg = '"' + patchName + '" ' + message;
+    console.log(msg);
+    errorLog += msg + '<br/>';
+}
+
+validatePatches = function() {
+    errorLog = "";
+    success = true;
+    for(var i = 0; i < mods.length; i++) {
+        var patch = mods[i];
+        var status = checkPatchBytes(patch.patches);
+        if(status == "on") {
+            console.log('"' + patch.name + '"', "is enabled!");
+        } else if(status == "off") {
+            console.log('"' + patch.name + '"', "is disabled!");
+        } else {
+            success = false;
+            buildError(patch.name, "is neither on nor off! Have you got the right dll?");
+        }
+    }
+    return success;
+}
+
+checkPatchBytes = function(patches) {
+    var patchStatus = "";
+    for(var i = 0; i < patches.length; i++) {
+        patch = patches[i];
+        if(bytesMatch(dllFile, patch.offset, patch.off)) {
+            if(patchStatus == "") {
+                patchStatus = "off";
+            } else if(patchStatus != "off"){
+                return "on/off mismatch within patch";
+            }
+        } else if(bytesMatch(dllFile, patch.offset, patch.on)) {
+            if(patchStatus == "") {
+                patchStatus = "on";
+            } else if(patchStatus != "on"){
+                return "on/off mismatch within patch";
+            }
+        } else {
+            return "patch neither on nor off";
+        }
+    }
+    return patchStatus;
+}
+
+bytesMatch = function(buffer, offset, bytes) {
+    for(var i = 0; i < bytes.length; i++) {
+        if(buffer[offset+i] != bytes[i])
+            return false;
+    }
+    return true;
+};
+
+replaceAll = function(buffer, patches, featureOn) {
+    for(var i = 0; i < patches.length; i++) {
+        replace(buffer, patches[i].offset, featureOn? patches[i].on : patches[i].off);
+    }
+}
+
+replace = function(buffer, offset, bytes) {
+    for(var i = 0; i < bytes.length; i++) {
+        buffer[offset+i] = bytes[i];
+    }
+}
+
+whichBytesMatch = function(buffer, offset, bytesArray) {
+    for(var i = 0; i < bytesArray.length; i++) {
+        if(bytesMatch(buffer, offset, bytesArray[i]))
+            return i;
+    }
+    return -1;
+}
+
+$( document ).ready(function() {
+    $('html').on('drag dragstart dragend dragover dragenter dragleave drop', function(e) {
+        e.preventDefault();
+        e.stopPropagation();
+    })
+    .on('drop', function(e) {
+        var files = e.originalEvent.dataTransfer.files;
+        if(files && files.length > 0)
+            loadFile(files[0]);
+    });
+    
+    $('#file').on('change', function(e) {
+        if(this.files && this.files.length > 0)
+            loadFile(this.files[0]);
+    });
+});