--- old/src/share/classes/java/util/Base64.java 2013-11-08 14:17:23.000000000 -0800
+++ new/src/share/classes/java/util/Base64.java 2013-11-08 14:17:23.000000000 -0800
@@ -50,7 +50,7 @@
*
* URL and Filename safe
* Uses the "URL and Filename safe Base64 Alphabet" as specified
- * in Table 2 of RFC 4648 for encoding and decoding. The
+* in Table 2 of RFC 4648 for encoding and decoding. The
* encoder does not add any line feed (line separator) character.
* The decoder rejects data that contains characters outside the
* base64 alphabet.
@@ -138,7 +138,7 @@
if (lineLength <= 0) {
return Encoder.RFC4648;
}
- return new Encoder(false, lineSeparator, lineLength >> 2 << 2);
+ return new Encoder(false, lineSeparator, lineLength >> 2 << 2, true);
}
/**
@@ -192,11 +192,13 @@
private final byte[] newline;
private final int linemax;
private final boolean isURL;
+ private final boolean doPadding;
- private Encoder(boolean isURL, byte[] newline, int linemax) {
+ private Encoder(boolean isURL, byte[] newline, int linemax, boolean doPadding) {
this.isURL = isURL;
this.newline = newline;
this.linemax = linemax;
+ this.doPadding = doPadding;
}
/**
@@ -228,9 +230,22 @@
private static final int MIMELINEMAX = 76;
private static final byte[] CRLF = new byte[] {'\r', '\n'};
- static final Encoder RFC4648 = new Encoder(false, null, -1);
- static final Encoder RFC4648_URLSAFE = new Encoder(true, null, -1);
- static final Encoder RFC2045 = new Encoder(false, CRLF, MIMELINEMAX);
+ static final Encoder RFC4648 = new Encoder(false, null, -1, true);
+ static final Encoder RFC4648_URLSAFE = new Encoder(true, null, -1, true);
+ static final Encoder RFC2045 = new Encoder(false, CRLF, MIMELINEMAX, true);
+
+ private final int outLength(int srclen) {
+ int len = 0;
+ if (doPadding) {
+ len = 4 * ((srclen + 2) / 3);
+ } else {
+ int n = srclen % 3;
+ len = 4 * (srclen / 3) + (n == 0 ? 0 : n + 1);
+ }
+ if (linemax > 0) // line separators
+ len += (len - 1) / linemax * newline.length;
+ return len;
+ }
/**
* Encodes all bytes from the specified byte array into a newly-allocated
@@ -243,9 +258,7 @@
* encoded bytes.
*/
public byte[] encode(byte[] src) {
- int len = 4 * ((src.length + 2) / 3); // dst array size
- if (linemax > 0) // line separators
- len += (len - 1) / linemax * newline.length;
+ int len = outLength(src.length); // dst array size
byte[] dst = new byte[len];
int ret = encode0(src, 0, src.length, dst);
if (ret != dst.length)
@@ -273,10 +286,7 @@
* space for encoding all input bytes.
*/
public int encode(byte[] src, byte[] dst) {
- int len = 4 * ((src.length + 2) / 3); // dst array size
- if (linemax > 0) {
- len += (len - 1) / linemax * newline.length;
- }
+ int len = outLength(src.length); // dst array size
if (dst.length < len)
throw new IllegalArgumentException(
"Output byte array is too small for encoding all input bytes");
@@ -321,9 +331,7 @@
* @return A newly-allocated byte buffer containing the encoded bytes.
*/
public ByteBuffer encode(ByteBuffer buffer) {
- int len = 4 * ((buffer.remaining() + 2) / 3);
- if (linemax > 0)
- len += (len - 1) / linemax * newline.length;
+ int len = outLength(buffer.remaining());
byte[] dst = new byte[len];
int ret = 0;
if (buffer.hasArray()) {
@@ -415,7 +423,25 @@
public OutputStream wrap(OutputStream os) {
Objects.requireNonNull(os);
return new EncOutputStream(os, isURL ? toBase64URL : toBase64,
- newline, linemax);
+ newline, linemax, doPadding);
+ }
+
+ /**
+ * Returns an encoder instance that encodes equivalently to this one,
+ * but without adding any padding character at the end of the encoded
+ * byte data.
+ *
+ * The encoding scheme of this encoder instance is unaffected by
+ * this invocation. The returned encoder instance should be used for
+ * non-padding encoding operation.
+ *
+ * @return an equivalent encoder that encodes without adding any
+ * padding character at the end
+ */
+ public Encoder withoutPadding() {
+ if (!doPadding)
+ return this;
+ return new Encoder(isURL, newline, linemax, false);
}
private int encodeArray(ByteBuffer src, ByteBuffer dst, int bytesOut) {
@@ -476,13 +502,17 @@
da[dp++] = (byte)base64[b0 >> 2];
if (sp == sl) {
da[dp++] = (byte)base64[(b0 << 4) & 0x3f];
- da[dp++] = '=';
- da[dp++] = '=';
+ if (doPadding) {
+ da[dp++] = '=';
+ da[dp++] = '=';
+ }
} else {
int b1 = sa[sp++] & 0xff;
da[dp++] = (byte)base64[(b0 << 4) & 0x3f | (b1 >> 4)];
da[dp++] = (byte)base64[(b1 << 2) & 0x3f];
- da[dp++] = '=';
+ if (doPadding) {
+ da[dp++] = '=';
+ }
}
}
return dp - dp00 + bytesOut;
@@ -548,13 +578,17 @@
dst.put(dp++, (byte)base64[b0 >> 2]);
if (sp == src.limit()) {
dst.put(dp++, (byte)base64[(b0 << 4) & 0x3f]);
- dst.put(dp++, (byte)'=');
- dst.put(dp++, (byte)'=');
+ if (doPadding) {
+ dst.put(dp++, (byte)'=');
+ dst.put(dp++, (byte)'=');
+ }
} else {
int b1 = src.get(sp++) & 0xff;
dst.put(dp++, (byte)base64[(b0 << 4) & 0x3f | (b1 >> 4)]);
dst.put(dp++, (byte)base64[(b1 << 2) & 0x3f]);
- dst.put(dp++, (byte)'=');
+ if (doPadding) {
+ dst.put(dp++, (byte)'=');
+ }
}
}
return dp - dp00 + bytesOut;
@@ -597,13 +631,17 @@
dst[dp++] = (byte)base64[b0 >> 2];
if (sp == end) {
dst[dp++] = (byte)base64[(b0 << 4) & 0x3f];
- dst[dp++] = '=';
- dst[dp++] = '=';
+ if (doPadding) {
+ dst[dp++] = '=';
+ dst[dp++] = '=';
+ }
} else {
int b1 = src[sp++] & 0xff;
dst[dp++] = (byte)base64[(b0 << 4) & 0x3f | (b1 >> 4)];
dst[dp++] = (byte)base64[(b1 << 2) & 0x3f];
- dst[dp++] = '=';
+ if (doPadding) {
+ dst[dp++] = '=';
+ }
}
}
return dp;
@@ -1149,14 +1187,16 @@
private final char[] base64; // byte->base64 mapping
private final byte[] newline; // line separator, if needed
private final int linemax;
+ private final boolean doPadding;// whether or not to pad
private int linepos = 0;
- EncOutputStream(OutputStream os,
- char[] base64, byte[] newline, int linemax) {
+ EncOutputStream(OutputStream os, char[] base64,
+ byte[] newline, int linemax, boolean doPadding) {
super(os);
this.base64 = base64;
this.newline = newline;
this.linemax = linemax;
+ this.doPadding = doPadding;
}
@Override
@@ -1228,14 +1268,18 @@
checkNewline();
out.write(base64[b0 >> 2]);
out.write(base64[(b0 << 4) & 0x3f]);
- out.write('=');
- out.write('=');
+ if (doPadding) {
+ out.write('=');
+ out.write('=');
+ }
} else if (leftover == 2) {
checkNewline();
out.write(base64[b0 >> 2]);
out.write(base64[(b0 << 4) & 0x3f | (b1 >> 4)]);
out.write(base64[(b1 << 2) & 0x3f]);
- out.write('=');
+ if (doPadding) {
+ out.write('=');
+ }
}
leftover = 0;
out.close();