bn: make .strip() an internal method (see #105)

lib/bn.js

@@ -103,7 +103,7 @@
       this.negative = 1;
     }
 
-    this.strip();
+    this._strip();
 
     if (endian !== 'le') return;
 
@@ -180,7 +180,7 @@
         }
       }
     }
-    return this.strip();
+    return this._strip();
   };
 
   function parseHex (str, start, end) {
@@ -234,7 +234,7 @@
       this.words[j] |= (w << off) & 0x3ffffff;
       this.words[j + 1] |= w >>> (26 - off) & 0x3fffff;
     }
-    this.strip();
+    this._strip();
   };
 
   function parseBase (str, start, end, mul) {
@@ -333,7 +333,7 @@
   };
 
   // Remove leading `0` from `this`
-  BN.prototype.strip = function strip () {
+  BN.prototype._strip = function strip () {
     while (this.length > 1 && this.words[this.length - 1] === 0) {
       this.length--;
     }
@@ -530,7 +530,7 @@
     assert(byteLength <= reqLength, 'byte array longer than desired length');
     assert(reqLength > 0, 'Requested array length <= 0');
 
-    this.strip();
+    this._strip();
     var littleEndian = endian === 'le';
     var res = allocate(ArrayType, reqLength);
 
@@ -705,7 +705,7 @@
       this.words[i] = this.words[i] | num.words[i];
     }
 
-    return this.strip();
+    return this._strip();
   };
 
   BN.prototype.ior = function ior (num) {
@@ -740,7 +740,7 @@
 
     this.length = b.length;
 
-    return this.strip();
+    return this._strip();
   };
 
   BN.prototype.iand = function iand (num) {
@@ -784,7 +784,7 @@
 
     this.length = a.length;
 
-    return this.strip();
+    return this._strip();
   };
 
   BN.prototype.ixor = function ixor (num) {
@@ -828,7 +828,7 @@
     }
 
     // And remove leading zeroes
-    return this.strip();
+    return this._strip();
   };
 
   BN.prototype.notn = function notn (width) {
@@ -850,7 +850,7 @@
       this.words[off] = this.words[off] & ~(1 << wbit);
     }
 
-    return this.strip();
+    return this._strip();
   };
 
   // Add `num` to `this` in-place
@@ -991,7 +991,7 @@
       this.negative = 1;
     }
 
-    return this.strip();
+    return this._strip();
   };
 
   // Subtract `num` from `this`
@@ -1037,7 +1037,7 @@
       out.length--;
     }
 
-    return out.strip();
+    return out._strip();
   }
 
   // TODO(indutny): it may be reasonable to omit it for users who don't need
@@ -1659,7 +1659,7 @@
       out.length--;
     }
 
-    return out.strip();
+    return out._strip();
   }
 
   function jumboMulTo (self, num, out) {
@@ -1876,7 +1876,7 @@
 
     out.negative = x.negative ^ y.negative;
     out.length = x.length + y.length;
-    return out.strip();
+    return out._strip();
   };
 
   // Multiply `this` by `num`
@@ -1994,7 +1994,7 @@
       this.length += s;
     }
 
-    return this.strip();
+    return this._strip();
   };
 
   BN.prototype.ishln = function ishln (bits) {
@@ -2060,7 +2060,7 @@
       this.length = 1;
     }
 
-    return this.strip();
+    return this._strip();
   };
 
   BN.prototype.ishrn = function ishrn (bits, hint, extended) {
@@ -2125,7 +2125,7 @@
       this.words[this.length - 1] &= mask;
     }
 
-    return this.strip();
+    return this._strip();
   };
 
   // Return only lowers bits of number
@@ -2200,7 +2200,7 @@
       }
     }
 
-    return this.strip();
+    return this._strip();
   };
 
   BN.prototype.addn = function addn (num) {
@@ -2242,7 +2242,7 @@
       this.words[i + shift] = w & 0x3ffffff;
     }
 
-    if (carry === 0) return this.strip();
+    if (carry === 0) return this._strip();
 
     // Subtraction overflow
     assert(carry === -1);
@@ -2254,7 +2254,7 @@
     }
     this.negative = 1;
 
-    return this.strip();
+    return this._strip();
   };
 
   BN.prototype._wordDiv = function _wordDiv (num, mode) {
@@ -2316,9 +2316,9 @@
       }
     }
     if (q) {
-      q.strip();
+      q._strip();
     }
-    a.strip();
+    a._strip();
 
     // Denormalize
     if (mode !== 'div' && shift !== 0) {
@@ -2492,7 +2492,7 @@
       carry = w % num;
     }
 
-    return this.strip();
+    return this._strip();
   };
 
   BN.prototype.divn = function divn (num) {
@@ -2744,7 +2744,7 @@
     if (this.negative !== 0 && !negative) return -1;
     if (this.negative === 0 && negative) return 1;
 
-    this.strip();
+    this._strip();
 
     var res;
     if (this.length > 1) {
@@ -2987,7 +2987,7 @@
     } else if (cmp > 0) {
       r.isub(this.p);
     } else {
-      r.strip();
+      r._strip();
     }
 
     return r;