first commit

hrmsEjb/jxl/biff/IntegerHelper.java

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+package jxl.biff;
+
+public final class IntegerHelper {
+  public static int getInt(byte b1, byte b2) {
+    int i1 = b1 & 0xFF;
+    int i2 = b2 & 0xFF;
+    int val = i2 << 8 | i1;
+    return val;
+  }
+  
+  public static short getShort(byte b1, byte b2) {
+    short i1 = (short)(b1 & 0xFF);
+    short i2 = (short)(b2 & 0xFF);
+    short val = (short)(i2 << 8 | i1);
+    return val;
+  }
+  
+  public static int getInt(byte b1, byte b2, byte b3, byte b4) {
+    int i1 = getInt(b1, b2);
+    int i2 = getInt(b3, b4);
+    int val = i2 << 16 | i1;
+    return val;
+  }
+  
+  public static byte[] getTwoBytes(int i) {
+    byte[] bytes = new byte[2];
+    bytes[0] = (byte)(i & 0xFF);
+    bytes[1] = (byte)((i & 0xFF00) >> 8);
+    return bytes;
+  }
+  
+  public static byte[] getFourBytes(int i) {
+    byte[] bytes = new byte[4];
+    int i1 = i & 0xFFFF;
+    int i2 = (i & 0xFFFF0000) >> 16;
+    getTwoBytes(i1, bytes, 0);
+    getTwoBytes(i2, bytes, 2);
+    return bytes;
+  }
+  
+  public static void getTwoBytes(int i, byte[] target, int pos) {
+    target[pos] = (byte)(i & 0xFF);
+    target[pos + 1] = (byte)((i & 0xFF00) >> 8);
+  }
+  
+  public static void getFourBytes(int i, byte[] target, int pos) {
+    byte[] bytes = getFourBytes(i);
+    target[pos] = bytes[0];
+    target[pos + 1] = bytes[1];
+    target[pos + 2] = bytes[2];
+    target[pos + 3] = bytes[3];
+  }
+}