From 73d343f630f7aa5b940cf488abb623d27c4d78c7 Mon Sep 17 00:00:00 2001
From: drieseng <gert.driesen@telenet.be>
Date: Sat, 21 May 2016 18:55:32 +0200
Subject: [PATCH] Use Array.Resize instead of creating new array and using
 Array.Copy to copy data over.

---
 src/Renci.SshNet/Common/BigInteger.cs | 46 ++++++++++-----------------
 1 file changed, 16 insertions(+), 30 deletions(-)

diff --git a/src/Renci.SshNet/Common/BigInteger.cs b/src/Renci.SshNet/Common/BigInteger.cs
index 6166f428..d69ece9a 100644
--- a/src/Renci.SshNet/Common/BigInteger.cs
+++ b/src/Renci.SshNet/Common/BigInteger.cs
@@ -487,7 +487,7 @@ namespace Renci.SshNet.Common
                     borrow = (uint)(sub >> 32) & 0x1u;
 
                     if ((~word & storeMask) == 0)
-                        _data = Resize(_data, _data.Length - 1);
+                        Array.Resize(ref _data, _data.Length - 1);
                     else
                         _data[_data.Length - 1] = ~word & storeMask;
                 }
@@ -1210,7 +1210,7 @@ namespace Renci.SshNet.Common
             int m;
             for (m = res.Length - 1; m >= 0 && res[m] == 0; --m) ;
             if (m < res.Length - 1)
-                res = Resize(res, m + 1);
+                Array.Resize(ref res, m + 1);
 
             return new BigInteger((short) (left._sign*right._sign), res);
         }
@@ -1242,7 +1242,7 @@ namespace Renci.SshNet.Common
             if (i == -1)
                 return Zero;
             if (i < quotient.Length - 1)
-                quotient = Resize(quotient, i + 1);
+                Array.Resize(ref quotient, i + 1);
 
             return new BigInteger((short)(dividend._sign * divisor._sign), quotient);
         }
@@ -1274,7 +1274,7 @@ namespace Renci.SshNet.Common
                 return Zero;
 
             if (i < remainderValue.Length - 1)
-                remainderValue = Resize(remainderValue, i + 1);
+                Array.Resize(ref remainderValue, i + 1);
             return new BigInteger(dividend._sign, remainderValue);
         }
 
@@ -1428,7 +1428,7 @@ namespace Renci.SshNet.Common
                 return Zero;
 
             if (i < result.Length - 1)
-                result = Resize(result, i + 1);
+                Array.Resize(ref result, i + 1);
 
             return new BigInteger(negRes ? (short)-1 : (short)1, result);
         }
@@ -1500,7 +1500,7 @@ namespace Renci.SshNet.Common
                 return Zero;
 
             if (i < result.Length - 1)
-                result = Resize(result, i + 1);
+                Array.Resize(ref result, i + 1);
 
             return new BigInteger(negRes ? (short)-1 : (short)1, result);
         }
@@ -1572,7 +1572,7 @@ namespace Renci.SshNet.Common
                 return Zero;
 
             if (i < result.Length - 1)
-                result = Resize(result, i + 1);
+                Array.Resize(ref result, i + 1);
 
             return new BigInteger(negRes ? (short)-1 : (short)1, result);
         }
@@ -1626,7 +1626,7 @@ namespace Renci.SshNet.Common
                 return Zero;
 
             if (i < result.Length - 1)
-                result = Resize(result, i + 1);
+                Array.Resize(ref result, i + 1);
 
             return new BigInteger(negRes ? (short)-1 : (short)1, result);
         }
@@ -3210,7 +3210,7 @@ namespace Renci.SshNet.Common
             else
             {
                 if (i < remainderValue.Length - 1)
-                    remainderValue = Resize(remainderValue, i + 1);
+                    Array.Resize(ref remainderValue, i + 1);
                 remainder = new BigInteger(dividend._sign, remainderValue);
             }
 
@@ -3218,7 +3218,7 @@ namespace Renci.SshNet.Common
             if (i == -1)
                 return Zero;
             if (i < quotient.Length - 1)
-                quotient = Resize(quotient, i + 1);
+                Array.Resize(ref quotient, i + 1);
 
             return new BigInteger((short)(dividend._sign * divisor._sign), quotient);
         }
@@ -3879,7 +3879,7 @@ namespace Renci.SshNet.Common
                     var to = ex + (needExtra ? 1 : 0);
 
                     if (to != extra)
-                        res = Resize(res, bytes + to);
+                        Array.Resize(ref res, bytes + to);
 
                     while (ex-- > 0)
                     {
@@ -3891,7 +3891,7 @@ namespace Renci.SshNet.Common
                 }
                 else
                 {
-                    res = Resize(res, bytes + 5);
+                    Array.Resize(ref res, bytes + 5);
                     res[j++] = (byte)word;
                     res[j++] = (byte)(word >> 8);
                     res[j++] = (byte)(word >> 16);
@@ -3903,20 +3903,6 @@ namespace Renci.SshNet.Common
             return res;
         }
 
-        private static byte[] Resize(byte[] v, int len)
-        {
-            var res = new byte[len];
-            Array.Copy(v, res, Math.Min(v.Length, len));
-            return res;
-        }
-
-        private static uint[] Resize(uint[] v, int len)
-        {
-            var res = new uint[len];
-            Array.Copy(v, res, Math.Min(v.Length, len));
-            return res;
-        }
-
         private static uint[] CoreAdd(uint[] a, uint[] b)
         {
             if (a.Length < b.Length)
@@ -3950,7 +3936,7 @@ namespace Renci.SshNet.Common
 
             if (sum != 0)
             {
-                res = Resize(res, bl + 1);
+                Array.Resize(ref res, bl + 1);
                 res[i] = (uint)sum;
             }
 
@@ -3985,7 +3971,7 @@ namespace Renci.SshNet.Common
             //remove extra zeroes
             for (i = bl - 1; i >= 0 && res[i] == 0; --i) ;
             if (i < bl - 1)
-                res = Resize(res, i + 1);
+                Array.Resize(ref res, i + 1);
 
             return res;
         }
@@ -4006,7 +3992,7 @@ namespace Renci.SshNet.Common
 
             if (sum != 0)
             {
-                res = Resize(res, len + 1);
+                Array.Resize(ref res, len + 1);
                 res[i] = (uint)sum;
             }
 
@@ -4030,7 +4016,7 @@ namespace Renci.SshNet.Common
             //remove extra zeroes
             for (i = len - 1; i >= 0 && res[i] == 0; --i) ;
             if (i < len - 1)
-                res = Resize(res, i + 1);
+                Array.Resize(ref res, i + 1);
 
             return res;
         }