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src/main/java/org/wildfly/security/password/Arrays2.java

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+/*
+ * JBoss, Home of Professional Open Source.
+ * Copyright 2014 Red Hat, Inc., and individual contributors
+ * as indicated by the @author tags.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.wildfly.security.password;
+
+/**
+ * @author <a href="mailto:david.lloyd@redhat.com">David M. Lloyd</a>
+ */
+final class Arrays2 {
+
+    private Arrays2() {
+    }
+
+    public static boolean equals(byte[] a1, int offs1, byte[] a2, int offs2, int len) {
+        if (offs1 + len > a1.length) return false;
+        if (offs2 + len > a2.length) return false;
+        for (int i = 0; i < len; i ++) {
+            if (a1[i + offs1] != a2[i + offs2]) {
+                return false;
+            }
+        }
+        return true;
+    }
+
+    public static boolean equals(byte[] a1, int offs, byte[] a2) {
+        return equals(a1, offs, a2, 0, a2.length);
+    }
+
+    public static boolean equals(char[] a1, int offs1, char[] a2, int offs2, int len) {
+        if (offs1 + len > a1.length) return false;
+        if (offs2 + len > a2.length) return false;
+        for (int i = 0; i < len; i ++) {
+            if (a1[i + offs1] != a2[i + offs2]) {
+                return false;
+            }
+        }
+        return true;
+    }
+
+    public static boolean equals(char[] a1, int offs, char[] a2) {
+        return equals(a1, offs, a2, 0, a2.length);
+    }
+
+    public static boolean equals(char[] a1, int offs1, String a2, int offs2, int len) {
+        if (offs1 + len > a1.length) return false;
+        if (offs2 + len > a2.length()) return false;
+        for (int i = 0; i < len; i ++) {
+            if (a1[i + offs1] != a2.charAt(i + offs2)) {
+                return false;
+            }
+        }
+        return true;
+    }
+
+    public static boolean equals(char[] a1, int offs, String a2) {
+        return equals(a1, offs, a2, 0, a2.length());
+    }
+
+    public static boolean equals(String a1, int offs, char[] a2) {
+        return equals(a2, 0, a1, offs, a2.length);
+    }
+
+    public static boolean equals(String a1, char[] a2) {
+        return equals(a1, 0, a2);
+    }
+}