Re #5851. Moved some code in GSLMatrix from .h to .cpp

Code/Mantid/Framework/CurveFitting/CMakeLists.txt

@@ -28,6 +28,7 @@ set ( SRC_FILES
 	src/FitMW.cpp
 	src/FlatBackground.cpp
 	src/GSLFunctions.cpp
+	src/GSLMatrix.cpp
 	src/GausDecay.cpp
 	src/GausOsc.cpp
 	src/Gaussian.cpp

Code/Mantid/Framework/CurveFitting/inc/MantidCurveFitting/GSLMatrix.h

@@ -95,7 +95,7 @@ namespace Mantid
     File change history is stored at: <https://svn.mantidproject.org/mantid/trunk/Code/Mantid>
     Code Documentation is available at: <http://doxygen.mantidproject.org>
     */
-  class GSLMatrix
+  class MANTID_CURVEFITTING_DLL GSLMatrix
   {
     /// The pointer to the GSL matrix
     gsl_matrix * m_matrix;
@@ -229,93 +229,23 @@ namespace Mantid
 
     /// Assign this matrix to a product of two other matrices
     /// @param mult2 :: Matrix multiplication helper object.
-    GSLMatrix& operator=(const GSLMatrixMult2& mult2)
-    {
-      // sizes of the result matrix
-      size_t n1 = mult2.tr1 ? mult2.m_1.size2() : mult2.m_1.size1();
-      size_t n2 = mult2.tr2 ? mult2.m_2.size1() : mult2.m_2.size2();
-
-      this->resize(n1,n2);
-
-      CBLAS_TRANSPOSE tr1 = mult2.tr1? CblasTrans : CblasNoTrans;
-      CBLAS_TRANSPOSE tr2 = mult2.tr2? CblasTrans : CblasNoTrans;
-
-      // this = m_1 * m_2
-      gsl_blas_dgemm (tr1, tr2,
-                      1.0, mult2.m_1.gsl(), mult2.m_2.gsl(),
-                      0.0, gsl());
-
-      return *this;
-    }
+    GSLMatrix& operator=(const GSLMatrixMult2& mult2);
 
     /// Assign this matrix to a product of three other matrices
     /// @param mult3 :: Matrix multiplication helper object.
-    GSLMatrix& operator=(const GSLMatrixMult3& mult3)
-    {
-      // sizes of the result matrix
-      size_t n1 = mult3.tr1 ? mult3.m_1.size2() : mult3.m_1.size1();
-      size_t n2 = mult3.tr3 ? mult3.m_3.size1() : mult3.m_3.size2();
-
-      this->resize(n1,n2);
-
-      // intermediate matrix 
-      GSLMatrix AB( n1, mult3.m_2.size2() );
-
-      CBLAS_TRANSPOSE tr1 = mult3.tr1? CblasTrans : CblasNoTrans;
-      CBLAS_TRANSPOSE tr2 = mult3.tr2? CblasTrans : CblasNoTrans;
-      CBLAS_TRANSPOSE tr3 = mult3.tr3? CblasTrans : CblasNoTrans;
-
-      // AB = m_1 * m_2
-      gsl_blas_dgemm (tr1, tr2,
-                      1.0, mult3.m_1.gsl(), mult3.m_2.gsl(),
-                      0.0, AB.gsl());
-
-      // this = AB * m_3
-      gsl_blas_dgemm (CblasNoTrans, tr3,
-                      1.0, AB.gsl(), mult3.m_3.gsl(),
-                      0.0, gsl());
-
-      return *this;
-    }
+    GSLMatrix& operator=(const GSLMatrixMult3& mult3);
 
     /// Solve system of linear equations M*x == rhs, M is this matrix
     /// This matrix is destroyed.
     /// @param rhs :: The right-hand-side vector
     /// @param x :: The solution vector
-    void solve(const GSLVector& rhs, GSLVector& x)
-    {
-      if (size1() != size2())
-      {
-        throw std::runtime_error("System of linear equations: the matrix must be square.");
-      }
-      size_t n = size1();
-      if (rhs.size() != n)
-      {
-        throw std::runtime_error("System of linear equations: right-hand side vector has wrong size.");
-      }
-      x.resize(n);
-      int s;
-      gsl_permutation * p = gsl_permutation_alloc( n );
-      gsl_linalg_LU_decomp( gsl(), p, &s ); // matrix is modified at this moment
-      gsl_linalg_LU_solve( gsl(), p, rhs.gsl(), x.gsl() );
-      gsl_permutation_free( p );
-    }
+    void solve(const GSLVector& rhs, GSLVector& x);
 
     /// Invert this matrix
-    void invert()
-    {
-      if (size1() != size2())
-      {
-        throw std::runtime_error("Matrix inverse: the matrix must be square.");
-      }
-      size_t n = size1();
-      int s;
-      GSLMatrix LU(*this);
-      gsl_permutation * p = gsl_permutation_alloc( n );
-      gsl_linalg_LU_decomp( LU.gsl(), p, &s );
-      gsl_linalg_LU_invert( LU.gsl(), p, this->gsl() );
-      gsl_permutation_free( p );
-    }
+    void invert();
+
+    /// Calculate the determinant
+    double det();
   };
 
   /// Overloaded operator for matrix multiplication