rtl: cleanup cipher.cxx equality conditions

Change-Id: I0b8084adea65f8c6a6e5e46b6628297fbd9eda9b

sal/rtl/cipher.cxx

@@ -135,9 +135,10 @@ rtlCipherError SAL_CALL rtl_cipher_init(
     const sal_uInt8 *pArgData, sal_Size nArgLen) SAL_THROW_EXTERN_C()
 {
     Cipher_Impl *pImpl = static_cast<Cipher_Impl*>(Cipher);
-    if (pImpl == nullptr)
+    if (!pImpl)
         return rtl_Cipher_E_Argument;
-    if (pImpl->m_init == nullptr)
+
+    if (!pImpl->m_init)
         return rtl_Cipher_E_Unknown;
 
     return (pImpl->m_init)(
@@ -150,9 +151,10 @@ rtlCipherError SAL_CALL rtl_cipher_encode(
     sal_uInt8  *pBuffer, sal_Size nBufLen) SAL_THROW_EXTERN_C()
 {
     Cipher_Impl *pImpl = static_cast<Cipher_Impl*>(Cipher);
-    if (pImpl == nullptr)
+    if (!pImpl)
         return rtl_Cipher_E_Argument;
-    if (pImpl->m_encode == nullptr)
+
+    if (!pImpl->m_encode)
         return rtl_Cipher_E_Unknown;
 
     return (pImpl->m_encode)(Cipher, pData, nDatLen, pBuffer, nBufLen);
@@ -164,9 +166,10 @@ rtlCipherError SAL_CALL rtl_cipher_decode(
     sal_uInt8  *pBuffer, sal_Size nBufLen) SAL_THROW_EXTERN_C()
 {
     Cipher_Impl *pImpl = static_cast<Cipher_Impl*>(Cipher);
-    if (pImpl == nullptr)
+    if (!pImpl)
         return rtl_Cipher_E_Argument;
-    if (pImpl->m_decode == nullptr)
+
+    if (!pImpl->m_decode)
         return rtl_Cipher_E_Unknown;
 
     return (pImpl->m_decode)(Cipher, pData, nDatLen, pBuffer, nBufLen);
@@ -681,10 +684,10 @@ static rtlCipherError BF_update(
     sal_uInt8          *pBuffer, sal_Size nBufLen)
 {
     /* Check arguments. */
-    if ((pData == nullptr) || (pBuffer == nullptr))
+    if (!pData || !pBuffer)
         return rtl_Cipher_E_Argument;
 
-    if (!((0 < nDatLen) && (nDatLen <= nBufLen)))
+    if (!((nDatLen > 0) && (nDatLen <= nBufLen)))
         return rtl_Cipher_E_BufferSize;
 
     /* Update. */
@@ -939,7 +942,7 @@ rtlCipher SAL_CALL rtl_cipher_createBF(rtlCipherMode Mode) SAL_THROW_EXTERN_C()
     CipherBF_Impl *pImpl = nullptr;
 
     if (Mode == rtl_Cipher_ModeInvalid)
-        return (nullptr);
+        return nullptr;
 
     pImpl = static_cast<CipherBF_Impl*>(rtl_allocateZeroMemory(sizeof (CipherBF_Impl)));
     if (pImpl)
@@ -964,13 +967,13 @@ rtlCipherError SAL_CALL rtl_cipher_initBF(
 {
     CipherBF_Impl *pImpl = static_cast<CipherBF_Impl*>(Cipher);
 
-    if ((pImpl == nullptr) || (pKeyData == nullptr))
+    if (!pImpl || !pKeyData)
         return rtl_Cipher_E_Argument;
 
-    if (!(pImpl->m_cipher.m_algorithm == rtl_Cipher_AlgorithmBF))
+    if (pImpl->m_cipher.m_algorithm != rtl_Cipher_AlgorithmBF)
         return rtl_Cipher_E_Algorithm;
 
-    if (!(Direction == rtl_Cipher_DirectionInvalid))
+    if (Direction != rtl_Cipher_DirectionInvalid)
         pImpl->m_cipher.m_direction = Direction;
     else
         return rtl_Cipher_E_Direction;
@@ -986,14 +989,15 @@ rtlCipherError SAL_CALL rtl_cipher_encodeBF(
     sal_uInt8  *pBuffer, sal_Size nBufLen) SAL_THROW_EXTERN_C()
 {
     CipherBF_Impl *pImpl = static_cast<CipherBF_Impl*>(Cipher);
-    if (pImpl == nullptr)
+    if (!pImpl)
         return rtl_Cipher_E_Argument;
 
-    if (!(pImpl->m_cipher.m_algorithm == rtl_Cipher_AlgorithmBF))
+    if (pImpl->m_cipher.m_algorithm != rtl_Cipher_AlgorithmBF)
         return rtl_Cipher_E_Algorithm;
 
     if (pImpl->m_cipher.m_direction == rtl_Cipher_DirectionInvalid)
         return rtl_Cipher_E_Direction;
+
     if (pImpl->m_cipher.m_direction == rtl_Cipher_DirectionDecode)
         return rtl_Cipher_E_Direction;
 
@@ -1009,14 +1013,15 @@ rtlCipherError SAL_CALL rtl_cipher_decodeBF(
     sal_uInt8  *pBuffer, sal_Size nBufLen) SAL_THROW_EXTERN_C()
 {
     CipherBF_Impl *pImpl = static_cast<CipherBF_Impl*>(Cipher);
-    if (pImpl == nullptr)
+    if (!pImpl)
         return rtl_Cipher_E_Argument;
 
-    if (!(pImpl->m_cipher.m_algorithm == rtl_Cipher_AlgorithmBF))
+    if (pImpl->m_cipher.m_algorithm != rtl_Cipher_AlgorithmBF)
         return rtl_Cipher_E_Algorithm;
 
     if (pImpl->m_cipher.m_direction == rtl_Cipher_DirectionInvalid)
         return rtl_Cipher_E_Direction;
+
     if (pImpl->m_cipher.m_direction == rtl_Cipher_DirectionEncode)
         return rtl_Cipher_E_Direction;
 
@@ -1115,7 +1120,7 @@ static rtlCipherError rtl_cipherARCFOUR_update_Impl(
     sal_Size k;
 
     /* Check arguments. */
-    if ((pData == nullptr) || (pBuffer == nullptr))
+    if (!pData || !pBuffer)
         return rtl_Cipher_E_Argument;
 
     if (!((0 < nDatLen) && (nDatLen <= nBufLen)))
@@ -1156,8 +1161,8 @@ rtlCipher SAL_CALL rtl_cipher_createARCFOUR(rtlCipherMode Mode)
 {
     CipherARCFOUR_Impl *pImpl = nullptr;
 
-    if (!(Mode == rtl_Cipher_ModeStream))
-        return (nullptr);
+    if (Mode != rtl_Cipher_ModeStream)
+        return nullptr;
 
     pImpl = static_cast<CipherARCFOUR_Impl*>(rtl_allocateZeroMemory(sizeof(CipherARCFOUR_Impl)));
     if (pImpl)
@@ -1184,18 +1189,18 @@ rtlCipherError SAL_CALL rtl_cipher_initARCFOUR(
 {
     CipherARCFOUR_Impl *pImpl = static_cast<CipherARCFOUR_Impl*>(Cipher);
 
-    if ((pImpl == nullptr) || (pKeyData == nullptr))
+    if (!pImpl || !pKeyData)
         return rtl_Cipher_E_Argument;
 
-    if (!(pImpl->m_cipher.m_algorithm == rtl_Cipher_AlgorithmARCFOUR))
+    if (pImpl->m_cipher.m_algorithm != rtl_Cipher_AlgorithmARCFOUR)
         return rtl_Cipher_E_Algorithm;
 
-    if (!(Direction == rtl_Cipher_DirectionInvalid))
+    if (Direction != rtl_Cipher_DirectionInvalid)
         pImpl->m_cipher.m_direction = Direction;
     else
         return rtl_Cipher_E_Direction;
 
-    return rtl_cipherARCFOUR_init_Impl (&(pImpl->m_context), pKeyData, nKeyLen);
+    return rtl_cipherARCFOUR_init_Impl(&(pImpl->m_context), pKeyData, nKeyLen);
 }
 
 rtlCipherError SAL_CALL rtl_cipher_encodeARCFOUR(
@@ -1204,10 +1209,10 @@ rtlCipherError SAL_CALL rtl_cipher_encodeARCFOUR(
     sal_uInt8  *pBuffer, sal_Size nBufLen) SAL_THROW_EXTERN_C()
 {
     CipherARCFOUR_Impl *pImpl = static_cast<CipherARCFOUR_Impl*>(Cipher);
-    if (pImpl == nullptr)
+    if (!pImpl)
         return rtl_Cipher_E_Argument;
 
-    if (!(pImpl->m_cipher.m_algorithm == rtl_Cipher_AlgorithmARCFOUR))
+    if (pImpl->m_cipher.m_algorithm != rtl_Cipher_AlgorithmARCFOUR)
         return rtl_Cipher_E_Algorithm;
 
     if (pImpl->m_cipher.m_direction == rtl_Cipher_DirectionInvalid)
@@ -1224,10 +1229,10 @@ rtlCipherError SAL_CALL rtl_cipher_decodeARCFOUR(
     sal_uInt8  *pBuffer, sal_Size nBufLen) SAL_THROW_EXTERN_C()
 {
     CipherARCFOUR_Impl *pImpl = static_cast<CipherARCFOUR_Impl*>(Cipher);
-    if (pImpl == nullptr)
+    if (!pImpl)
         return rtl_Cipher_E_Argument;
 
-    if (!(pImpl->m_cipher.m_algorithm == rtl_Cipher_AlgorithmARCFOUR))
+    if (pImpl->m_cipher.m_algorithm != rtl_Cipher_AlgorithmARCFOUR)
         return rtl_Cipher_E_Algorithm;
 
     if (pImpl->m_cipher.m_direction == rtl_Cipher_DirectionInvalid)