Added bitLength, clamp(), toDouble(), toSigned(), toUnsigned().

pkg/fixnum/lib/src/int32.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 part of fixnum;
 
 /**
  * An immutable 32-bit signed integer, in the range [-2^31, 2^31 - 1].
  * Arithmetic operations may overflow in order to maintain this range.
  */
@@ skipping 314 matching lines @@
     }
     return _i >= _toInt(other);
   }
 
   bool get isEven => (_i & 0x1) == 0;
   bool get isMaxValue => _i == 2147483647;
   bool get isMinValue => _i == -2147483648;
   bool get isNegative => _i < 0;
   bool get isOdd => (_i & 0x1) == 1;
   bool get isZero => _i == 0;
+  int get bitLength => _i.bitLength;
 
   int get hashCode => _i;
 
   Int32 abs() => _i < 0 ? new Int32(-_i) : this;
 
+  Int32 clamp(lowerLimit, upperLimit) {
+    if (this < lowerLimit) {
+      if (lowerLimit is IntX) return lowerLimit.toInt32();
+      if (lowerLimit is int) return new Int32(lowerLimit);
+      throw new ArgumentError(lowerLimit);
+    } else if (this > upperLimit) {
+      if (upperLimit is IntX) return upperLimit.toInt32();
+      if (upperLimit is int) return new Int32(upperLimit);
+      throw new ArgumentError(upperLimit);
+    }
+    return this;
+  }
+
   int numberOfLeadingZeros() => _numberOfLeadingZeros(_i);
   int numberOfTrailingZeros() => _numberOfTrailingZeros(_i);
 
+  Int32 toSigned(int width) {
+    if (width < 1 || width > 32) throw new ArgumentError(width);
+    return new Int32(_i.toSigned(width));
+  }
+
+  Int32 toUnsigned(int width) {
+    if (width < 0 || width > 32) throw new ArgumentError(width);
+    return new Int32(_i.toUnsigned(width));
+  }
+
   List<int> toBytes() {
     List<int> result = new List<int>(4);
     result[0] = _i & 0xff;
     result[1] = (_i >> 8) & 0xff;
     result[2] = (_i >> 16) & 0xff;
     result[3] = (_i >> 24) & 0xff;
     return result;
   }
 
+  double toDouble() => _i.toDouble();
   int toInt() => _i;
   Int32 toInt32() => this;
   Int64 toInt64() => new Int64(_i);
 
   String toString() => _i.toString();
   String toHexString() => _i.toRadixString(16);
   String toRadixString(int radix) => _i.toRadixString(radix);
 }