X-Git-Url: https://code.wpia.club/?p=gigi.git;a=blobdiff_plain;f=lib%2Fjtar%2Forg%2Fkamranzafar%2Fjtar%2FTarUtils.java;fp=lib%2Fjtar%2Forg%2Fkamranzafar%2Fjtar%2FTarUtils.java;h=8dccc37967307c1a8da1b1e8a8d171d502b33859;hp=0000000000000000000000000000000000000000;hb=69e01f194e6183eccb8c7ca6f75fbe1132e0f194;hpb=49b403316469afb4f62c5b60401667640746af37

diff --git a/lib/jtar/org/kamranzafar/jtar/TarUtils.java b/lib/jtar/org/kamranzafar/jtar/TarUtils.java
new file mode 100644
index 00000000..8dccc379
--- /dev/null
+++ b/lib/jtar/org/kamranzafar/jtar/TarUtils.java
@@ -0,0 +1,96 @@
+/**
+ * Copyright 2012 Kamran Zafar 
+ * 
+ * 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.kamranzafar.jtar;
+
+import java.io.File;
+
+/**
+ * @author Kamran
+ * 
+ */
+public class TarUtils {
+	/**
+	 * Determines the tar file size of the given folder/file path
+	 * 
+	 * @param path
+	 * @return
+	 */
+	public static long calculateTarSize(File path) {
+		return tarSize(path) + TarConstants.EOF_BLOCK;
+	}
+
+	private static long tarSize(File dir) {
+		long size = 0;
+
+		if (dir.isFile()) {
+			return entrySize(dir.length());
+		} else {
+			File[] subFiles = dir.listFiles();
+
+			if (subFiles != null && subFiles.length > 0) {
+				for (File file : subFiles) {
+					if (file.isFile()) {
+						size += entrySize(file.length());
+					} else {
+						size += tarSize(file);
+					}
+				}
+			} else {
+				// Empty folder header
+				return TarConstants.HEADER_BLOCK;
+			}
+		}
+
+		return size;
+	}
+
+	private static long entrySize(long fileSize) {
+		long size = 0;
+		size += TarConstants.HEADER_BLOCK; // Header
+		size += fileSize; // File size
+
+		long extra = size % TarConstants.DATA_BLOCK;
+
+		if (extra > 0) {
+			size += (TarConstants.DATA_BLOCK - extra); // pad
+		}
+
+		return size;
+	}
+
+	public static String trim(String s, char c) {
+		StringBuffer tmp = new StringBuffer(s);
+		for (int i = 0; i < tmp.length(); i++) {
+			if (tmp.charAt(i) != c) {
+				break;
+			} else {
+				tmp.deleteCharAt(i);
+			}
+		}
+
+		for (int i = tmp.length() - 1; i >= 0; i--) {
+			if (tmp.charAt(i) != c) {
+				break;
+			} else {
+				tmp.deleteCharAt(i);
+			}
+		}
+
+		return tmp.toString();
+	}
+}