From 124f869faae3a0f75a3825e6a8e195c17f3c626a Mon Sep 17 00:00:00 2001
From: Andrew Dolgov <noreply@fakecake.org>
Date: Thu, 16 Oct 2014 23:34:20 +0400
Subject: initial for idea

---
 .../java/com/github/junrar/util/VolumeHelper.java  | 101 +++++++++++++++++++++
 1 file changed, 101 insertions(+)
 create mode 100644 org.fox.ttcomics/src/main/java/com/github/junrar/util/VolumeHelper.java

(limited to 'org.fox.ttcomics/src/main/java/com/github/junrar/util/VolumeHelper.java')

diff --git a/org.fox.ttcomics/src/main/java/com/github/junrar/util/VolumeHelper.java b/org.fox.ttcomics/src/main/java/com/github/junrar/util/VolumeHelper.java
new file mode 100644
index 0000000..4238051
--- /dev/null
+++ b/org.fox.ttcomics/src/main/java/com/github/junrar/util/VolumeHelper.java
@@ -0,0 +1,101 @@
+package com.github.junrar.util;
+
+/**
+ * 
+ * @author alban
+ */
+public class VolumeHelper {
+	private VolumeHelper() {
+	}
+
+	// public static boolean mergeArchive(Archive archive, ComprDataIO dataIO)
+	// throws IOException {
+	// FileHeader hd = dataIO.getSubHeader();
+	// if (hd.getUnpVersion() >= 20 && hd.getFileCRC() != 0xffffffff
+	// && dataIO.getPackedCRC() != ~hd.getFileCRC()) {
+	// System.err.println("Data Bad CRC");
+	// }
+	//
+	// boolean oldNumbering = !archive.getMainHeader().isNewNumbering()
+	// || archive.isOldFormat();
+	// String nextName = nextVolumeName(archive.getFile().getAbsolutePath(),
+	// oldNumbering);
+	// File nextVolume = new File(nextName);
+	// UnrarCallback callback = archive.getUnrarCallback();
+	// if ((callback != null) && !callback.isNextVolumeReady(nextVolume)) {
+	// return false;
+	// }
+	// if (!nextVolume.exists()) {
+	// return false;
+	// }
+	// archive.setFile(nextVolume);
+	// hd = archive.nextFileHeader();
+	// if (hd == null) {
+	// return false;
+	// }
+	// dataIO.init(hd);
+	// return true;
+	// }
+
+	public static String nextVolumeName(String arcName, boolean oldNumbering) {
+		if (!oldNumbering) {
+			// part1.rar, part2.rar, ...
+			int len = arcName.length();
+			int indexR = len - 1;
+			while ((indexR >= 0) && !isDigit(arcName.charAt(indexR))) {
+				indexR--;
+			}
+			int index = indexR + 1;
+			int indexL = indexR - 1;
+			while ((indexL >= 0) && isDigit(arcName.charAt(indexL))) {
+				indexL--;
+			}
+			if (indexL < 0) {
+				return null;
+			}
+			indexL++;
+			StringBuilder buffer = new StringBuilder(len);
+			buffer.append(arcName, 0, indexL);
+			char[] digits = new char[indexR - indexL + 1];
+			arcName.getChars(indexL, indexR + 1, digits, 0);
+			indexR = digits.length - 1;
+			while ((indexR >= 0) && (++digits[indexR]) == '9' + 1) {
+				digits[indexR] = '0';
+				indexR--;
+			}
+			if (indexR < 0) {
+				buffer.append('1');
+			}
+			buffer.append(digits);
+			buffer.append(arcName, index, len);
+			return buffer.toString();
+		} else {
+			// .rar, .r00, .r01, ...
+			int len = arcName.length();
+			if ((len <= 4) || (arcName.charAt(len - 4) != '.')) {
+				return null;
+			}
+			StringBuilder buffer = new StringBuilder();
+			int off = len - 3;
+			buffer.append(arcName, 0, off);
+			if (!isDigit(arcName.charAt(off + 1))
+					|| !isDigit(arcName.charAt(off + 2))) {
+				buffer.append("r00");
+			} else {
+				char[] ext = new char[3];
+				arcName.getChars(off, len, ext, 0);
+				int i = ext.length - 1;
+				while ((++ext[i]) == '9' + 1) {
+					ext[i] = '0';
+					i--;
+				}
+				buffer.append(ext);
+			}
+			return buffer.toString();
+		}
+	}
+
+	private static boolean isDigit(char c) {
+		return (c >= '0') && (c <= '9');
+	}
+}
-- 
cgit v1.2.3