X-Git-Url: https://git.argeo.org/?a=blobdiff_plain;f=basic%2Fruntime%2Forg.argeo.basic.nodeps%2Fsrc%2Fmain%2Fjava%2Forg%2Fargeo%2FStreamUtils.java;h=c94950d194cd97bb6a5f2bb865890cd4a2c63fa6;hb=6bb0606505be3e99021c5ff9771c719eb1e1f2e7;hp=d2ccdb737af9e2bad7e00907bd871f118e7a9449;hpb=4310414c41cc0b9e52866f81ec6c60bbf6686d16;p=lgpl%2Fargeo-commons.git

diff --git a/basic/runtime/org.argeo.basic.nodeps/src/main/java/org/argeo/StreamUtils.java b/basic/runtime/org.argeo.basic.nodeps/src/main/java/org/argeo/StreamUtils.java
index d2ccdb737..c94950d19 100644
--- a/basic/runtime/org.argeo.basic.nodeps/src/main/java/org/argeo/StreamUtils.java
+++ b/basic/runtime/org.argeo.basic.nodeps/src/main/java/org/argeo/StreamUtils.java
@@ -10,6 +10,10 @@ import java.io.Writer;
 public class StreamUtils {
 	private static final int DEFAULT_BUFFER_SIZE = 1024 * 4;
 
+	/*
+	 * APACHE COMMONS IO (inspired)
+	 */
+
 	/** @return the number of bytes */
 	public static Long copy(InputStream in, OutputStream out)
 			throws IOException {
@@ -75,8 +79,90 @@ public class StreamUtils {
 			}
 	}
 
-	private StreamUtils() {
+	/*
+	 * APACHE COMMONS CODEC (forked)
+	 */
+	/**
+	 * Used to build output as Hex
+	 */
+	private static final char[] DIGITS_LOWER = { '0', '1', '2', '3', '4', '5',
+			'6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f' };
+
+	/**
+	 * Used to build output as Hex
+	 */
+	private static final char[] DIGITS_UPPER = { '0', '1', '2', '3', '4', '5',
+			'6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' };
 
+	/**
+	 * Converts an array of bytes into a String representing the hexadecimal
+	 * values of each byte in order. The returned String will be double the
+	 * length of the passed array, as it takes two characters to represent any
+	 * given byte.
+	 * 
+	 * @param data
+	 *            a byte[] to convert to Hex characters
+	 * @return A String containing hexadecimal characters
+	 * @since 1.4
+	 */
+	public static String encodeHexString(byte[] data) {
+		return new String(encodeHex(data));
+	}
+
+	/**
+	 * Converts an array of bytes into an array of characters representing the
+	 * hexadecimal values of each byte in order. The returned array will be
+	 * double the length of the passed array, as it takes two characters to
+	 * represent any given byte.
+	 * 
+	 * @param data
+	 *            a byte[] to convert to Hex characters
+	 * @return A char[] containing hexadecimal characters
+	 */
+	public static char[] encodeHex(byte[] data) {
+		return encodeHex(data, true);
+	}
+
+	/**
+	 * Converts an array of bytes into an array of characters representing the
+	 * hexadecimal values of each byte in order. The returned array will be
+	 * double the length of the passed array, as it takes two characters to
+	 * represent any given byte.
+	 * 
+	 * @param data
+	 *            a byte[] to convert to Hex characters
+	 * @param toLowerCase
+	 *            <code>true</code> converts to lowercase, <code>false</code> to
+	 *            uppercase
+	 * @return A char[] containing hexadecimal characters
+	 * @since 1.4
+	 */
+	public static char[] encodeHex(byte[] data, boolean toLowerCase) {
+		return encodeHex(data, toLowerCase ? DIGITS_LOWER : DIGITS_UPPER);
+	}
+
+	/**
+	 * Converts an array of bytes into an array of characters representing the
+	 * hexadecimal values of each byte in order. The returned array will be
+	 * double the length of the passed array, as it takes two characters to
+	 * represent any given byte.
+	 * 
+	 * @param data
+	 *            a byte[] to convert to Hex characters
+	 * @param toDigits
+	 *            the output alphabet
+	 * @return A char[] containing hexadecimal characters
+	 * @since 1.4
+	 */
+	protected static char[] encodeHex(byte[] data, char[] toDigits) {
+		int l = data.length;
+		char[] out = new char[l << 1];
+		// two characters form the hex value.
+		for (int i = 0, j = 0; i < l; i++) {
+			out[j++] = toDigits[(0xF0 & data[i]) >>> 4];
+			out[j++] = toDigits[0x0F & data[i]];
+		}
+		return out;
 	}
 
 }