JAL-3541 selectively merged build.gradle and gradle.properties

[jalview.git] / unused / javajs / util / Base64.java

diff --git a/unused/javajs/util/Base64.java b/unused/javajs/util/Base64.java
new file mode 100644 (file)
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+++ b/unused/javajs/util/Base64.java
@@ -0,0 +1,120 @@
+// Version 1.0a
+// Copyright (C) 1998, James R. Weeks and BioElectroMech.
+// Visit BioElectroMech at www.obrador.com.  Email James@obrador.com.
+
+// See license.txt for details about the allowed used of this software.
+// This software is based in part on the work of the Independent JPEG Group.
+// See IJGreadme.txt for details about the Independent JPEG Group's license.
+
+// This encoder is inspired by the Java Jpeg encoder by Florian Raemy,
+// studwww.eurecom.fr/~raemy.
+// It borrows a great deal of code and structure from the Independent
+// Jpeg Group's Jpeg 6a library, Copyright Thomas G. Lane.
+// See license.txt for details.
+
+package javajs.util;
+
+
+public class Base64 {
+
+  //                              0         1         2         3         4         5         6
+  //                              0123456789012345678901234567890123456789012345678901234567890123
+  private static String base64 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
+  //                              41----------------------5A
+  //                                                        61----------------------7A
+  //                                                                                  30------39    
+  //                                                                                            2B  
+  //                                                                                             2F
+  //                                                 alternative "URL-SAFE"     2D and 5F       -_
+  
+  private static int[] decode64 = new int[] {
+    0,0,0,0,     0,0,0,0,     0,0,0,0,     0,0,0,0,      //0x00-0x0F
+    0,0,0,0,     0,0,0,0,     0,0,0,0,     0,0,0,0,      //0x10-0x1F
+    0,0,0,0,     0,0,0,0,     0,0,0,62,    0,62,0,63,    //0x20-0x2F
+    52,53,54,55, 56,57,58,59, 60,61,0,0,   0,0,0,0,      //0x30-0x3F
+    0,0,1,2,     3,4,5,6,     7,8,9,10,    11,12,13,14,  //0x40-0x4F
+    15,16,17,18, 19,20,21,22, 23,24,25,0,  0,0,0,63,     //0x50-0x5F
+    0,26,27,28,  29,30,31,32, 33,34,35,36, 37,38,39,40,  //0x60-0x6F
+    41,42,43,44, 45,46,47,48, 49,50,51,0,  0,0,0,0,      //0x70-0x7F
+  };
+    
+//  public static void write(byte[] bytes, OutputChannel out) {
+//    SB sb = getBase64(bytes);
+//    int len = sb.length();
+//    byte[] b = new byte[1];
+//    for (int i = 0; i < len; i++) {
+//      b[0] = (byte) sb.charAt(i);
+//      out.write(b, 0, 1);
+//    }
+//  }
+
+  public static byte[] getBytes64(byte[] bytes) {
+    return getBase64(bytes).toBytes(0, -1);
+  }
+
+  /**
+   * 
+   * @param bytes
+   * @return BASE64-encoded string, without ";base64,"
+   */
+  public static SB getBase64(byte[] bytes) {
+    long nBytes = bytes.length;
+    SB sout = new SB();
+    if (nBytes == 0)
+      return sout;
+    for (int i = 0, nPad = 0; i < nBytes && nPad == 0;) {
+      if (i % 75 == 0 && i != 0)
+        sout.append("\r\n");
+      nPad = (i + 2 == nBytes ? 1 : i + 1 == nBytes ? 2 : 0);
+      int outbytes = ((bytes[i++] << 16) & 0xFF0000)
+          | ((nPad == 2 ? 0 : bytes[i++] << 8) & 0x00FF00)
+          | ((nPad >= 1 ? 0 : (int) bytes[i++]) & 0x0000FF);
+      //System.out.println(Integer.toHexString(outbytes));
+      sout.appendC(base64.charAt((outbytes >> 18) & 0x3F));
+      sout.appendC(base64.charAt((outbytes >> 12) & 0x3F));
+      sout.appendC(nPad == 2 ? '=' : base64.charAt((outbytes >> 6) & 0x3F));
+      sout.appendC(nPad >= 1 ? '=' : base64.charAt(outbytes & 0x3F));
+    }
+    return sout;
+  }
+
+  //Note: Just a simple decoder here. Nothing fancy at all
+  //      Because of the 0s in decode64, this is not a VERIFIER
+  //      Rather, it may decode even bad Base64-encoded data
+  //
+  // Bob Hanson 4/2007
+  
+  public static byte[] decodeBase64(String strBase64) {
+    int nBytes = 0;
+    int ch;
+    int pt0 = strBase64.indexOf(";base64,") + 1;
+    if (pt0 > 0)
+      pt0 += 7;
+    char[] chars64 = strBase64.toCharArray();
+    int len64 = chars64.length;
+    if (len64 == 0)
+      return new byte[0];
+    for (int i = len64; --i >= pt0;)
+      nBytes += ((ch = chars64[i] & 0x7F) == 'A' || decode64[ch] > 0 ? 3 : 0);
+    nBytes = nBytes >> 2;
+    byte[] bytes = new byte[nBytes];
+    int offset = 18;
+    for (int i = pt0, pt = 0, b = 0; i < len64; i++) {
+      if (decode64[ch = chars64[i] & 0x7F] > 0 || ch == 'A' || ch == '=') {
+        b |= decode64[ch] << offset;
+        //System.out.println(chars64[i] + " " + decode64[ch] + " " + offset + " " + Integer.toHexString(b));
+        offset -= 6;
+        if (offset < 0) {
+          bytes[pt++] = (byte) ((b & 0xFF0000) >> 16);
+          if (pt < nBytes)
+            bytes[pt++] = (byte) ((b & 0xFF00) >> 8);
+          if (pt < nBytes)
+            bytes[pt++] = (byte) (b & 0xFF);
+          offset = 18;
+          b =  0;
+        }
+      }
+    }
+    return bytes;
+  }    
+}
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