REPORT-103466 导出负载高

fine-itext-old/src/main/java/com/fr/third/com/lowagie/text/pdf/ByteBuffer.java

@@ -82,7 +82,8 @@ public class ByteBuffer extends OutputStream {
      */    
     public static boolean HIGH_PRECISION = false;
     private static final DecimalFormatSymbols dfs = new DecimalFormatSymbols(Locale.US);
-    
+    private static final int HALF_INTEGER = Integer.MAX_VALUE >> 1;
+
     /** Creates new ByteBuffer with capacity 128 */
     public ByteBuffer() {
         this(128);
@@ -188,8 +189,11 @@ public class ByteBuffer extends OutputStream {
      */
     public ByteBuffer append_i(int b) {
         int newcount = count + 1;
+        if (newcount < 0) {
+            throw new OutOfMemoryError();
+        }
         if (newcount > buf.length) {
-            byte newbuf[] = new byte[Math.max(buf.length << 1, newcount)];
+            byte newbuf[] = new byte[Math.max(Math.min(buf.length, HALF_INTEGER) << 1, newcount)];
             System.arraycopy(buf, 0, newbuf, 0, count);
             buf = newbuf;
         }
@@ -211,8 +215,11 @@ public class ByteBuffer extends OutputStream {
         ((off + len) > b.length) || ((off + len) < 0) || len == 0)
             return this;
         int newcount = count + len;
+        if (newcount < 0) {
+            throw new OutOfMemoryError();
+        }
         if (newcount > buf.length) {
-            byte newbuf[] = new byte[Math.max(buf.length << 1, newcount)];
+            byte newbuf[] = new byte[Math.max(Math.min(buf.length, HALF_INTEGER) << 1, newcount)];
             System.arraycopy(buf, 0, newbuf, 0, count);
             buf = newbuf;
         }