1 files changed, 24 insertions, 21 deletions

diff --git a/src/idea.cpp b/src/idea.cpp
index ed142ca9b..c12f7b5b9 100644
--- a/src/idea.cpp
+++ b/src/idea.cpp
@@ -17,13 +17,13 @@ inline void mul(u16bit& a, u16bit b)
    {
    if(a && b)
       {
-      u32bit temp = (u32bit)a * b;
-      a = (u16bit)(temp >> 16);
-      b = (u16bit)(temp & 0xFFFF);
-      a = (u16bit)(b - a + ((b < a) ? 1 : 0));
+      u32bit temp = static_cast<u32bit>(a) * b;
+      a = static_cast<u16bit>(temp >> 16);
+      b = static_cast<u16bit>(temp & 0xFFFF);
+      a = static_cast<u16bit>(b - a + ((b < a) ? 1 : 0));
       }
    else
-      a = (u16bit)(1 - a - b);
+      a = static_cast<u16bit>(1 - a - b);
    }
 
 }
@@ -48,7 +48,7 @@ void IDEA::enc(const byte in[], byte out[]) const
       X3 ^= X1;
       mul(X3, EK[6*j+4]);
       u16bit T1 = X2;
-      X2 = (u16bit)((X2 ^ X4) + X3);
+      X2 = static_cast<u16bit>((X2 ^ X4) + X3);
       mul(X2, EK[6*j+5]);
       X3 += X2;
       X1 ^= X2;
@@ -82,7 +82,7 @@ void IDEA::dec(const byte in[], byte out[]) const
       X3 ^= X1;
       mul(X3, DK[6*j+4]);
       u16bit T1 = X2;
-      X2 = (u16bit)((X2 ^ X4) + X3);
+      X2 = static_cast<u16bit>((X2 ^ X4) + X3);
       mul(X2, DK[6*j+5]);
       X3 += X2;
       X1 ^= X2;
@@ -103,19 +103,22 @@ u16bit IDEA::mul_inv(u16bit x)
    {
    if(x <= 1)
       return x;
-   u16bit t0 = (u16bit)(65537 / x), t1 = 1, y = (u16bit)(65537 % x);
+
+   u16bit t0 = static_cast<u16bit>(65537 / x), t1 = 1;
+   u16bit y = static_cast<u16bit>(65537 % x);
+
    while(y != 1)
       {
-      u16bit q = (u16bit)(x / y);
+      u16bit q = static_cast<u16bit>(x / y);
       x %= y;
-      t1 += (u16bit)(q * t0);
+      t1 += static_cast<u16bit>(q * t0);
       if(x == 1)
          return t1;
-      q = (u16bit)(y / x);
+      q = static_cast<u16bit>(y / x);
       y %= x;
-      t0 += (u16bit)(q * t1);
+      t0 += static_cast<u16bit>(q * t1);
       }
-   return (u16bit)(1 - t0);
+   return static_cast<u16bit>(1 - t0);
    }
 
 /*************************************************
@@ -128,14 +131,14 @@ void IDEA::key(const byte key[], u32bit)
 
    for(u32bit j = 1, k = 8, offset = 0; k != 52; j %= 8, ++j, ++k)
       {
-      EK[j+7+offset] = (u16bit)((EK[(j     % 8) + offset] << 9) |
-                                (EK[((j+1) % 8) + offset] >> 7));
+      EK[j+7+offset] = static_cast<u16bit>((EK[(j     % 8) + offset] << 9) |
+                                           (EK[((j+1) % 8) + offset] >> 7));
       offset += (j == 8) ? 8 : 0;
       }
 
    DK[51] = mul_inv(EK[3]);
-   DK[50] = (u16bit)-EK[2];
-   DK[49] = (u16bit)-EK[1];
+   DK[50] = -EK[2];
+   DK[49] = -EK[1];
    DK[48] = mul_inv(EK[0]);
 
    for(u32bit j = 1, k = 4, counter = 47; j != 8; ++j, k += 6)
@@ -143,16 +146,16 @@ void IDEA::key(const byte key[], u32bit)
       DK[counter--] = EK[k+1];
       DK[counter--] = EK[k];
       DK[counter--] = mul_inv(EK[k+5]);
-      DK[counter--] = (u16bit)-EK[k+3];
-      DK[counter--] = (u16bit)-EK[k+4];
+      DK[counter--] = -EK[k+3];
+      DK[counter--] = -EK[k+4];
       DK[counter--] = mul_inv(EK[k+2]);
       }
 
    DK[5] = EK[47];
    DK[4] = EK[46];
    DK[3] = mul_inv(EK[51]);
-   DK[2] = (u16bit)-EK[50];
-   DK[1] = (u16bit)-EK[49];
+   DK[2] = -EK[50];
+   DK[1] = -EK[49];
    DK[0] = mul_inv(EK[48]);
    }