changeset 1934:0e591d443ff0

[project @ 1996-02-12 03:25:10 by jwe]
author jwe
date Mon, 12 Feb 1996 03:25:10 +0000
parents 333923894848
children 23c350d0cf9d
files liboctave/EIG.cc liboctave/EIG.h
diffstat 2 files changed, 64 insertions(+), 51 deletions(-) [+]
line wrap: on
line diff
--- a/liboctave/EIG.cc
+++ b/liboctave/EIG.cc
@@ -52,106 +52,117 @@
 int
 EIG::init (const Matrix& a)
 {
-  int a_nr = a.rows ();
-  if (a_nr != a.cols ())
+  int n = a.rows ();
+
+  if (n != a.cols ())
     {
       (*current_liboctave_error_handler) ("EIG requires square matrix");
       return -1;
     }
 
-  int n = a_nr;
-
   int info;
 
-  double *tmp_data = dup (a.data (), a.length ());
-  double *wr = new double[n];
-  double *wi = new double[n];
+  Matrix atmp = a;
+  double *tmp_data = atmp.fortran_vec ();
+
+  Array<double> wr (n);
+  double *pwr = wr.fortran_vec ();
+
+  Array<double> wi (n);
+  double *pwi = wi.fortran_vec ();
+
   Matrix vr (n, n);
   double *pvr = vr.fortran_vec ();
+
   int lwork = 8*n;
-  double *work = new double[lwork];
+
+  Array<double> work (lwork);
+  double *pwork = work.fortran_vec ();
 
   double *dummy = 0;
   int idummy = 1;
 
-  F77_FCN (dgeev, DGEEV) ("N", "V", n, tmp_data, n, wr, wi, dummy,
-			  idummy, pvr, n, work, lwork, info, 1L, 1L);
+  F77_XFCN (dgeev, DGEEV, ("N", "V", n, tmp_data, n, pwr, pwi, dummy,
+			   idummy, pvr, n, pwork, lwork, info, 1L, 1L));
 
-  lambda.resize (n);
-  v.resize (n, n);
-
-  for (int j = 0; j < n; j++)
+  if (f77_exception_encountered)
+    (*current_liboctave_error_handler) ("unrecoverable error in dgeev");
+  else
     {
-      if (wi[j] == 0.0)
-	{
-	  lambda.elem (j) = Complex (wr[j]);
-	  for (int i = 0; i < n; i++)
-	    v.elem (i, j) = vr.elem (i, j);
-	}
-      else
+      lambda.resize (n);
+      v.resize (n, n);
+
+      for (int j = 0; j < n; j++)
 	{
-	  if (j+1 >= n)
+	  if (wi.elem (j) == 0.0)
 	    {
-	      (*current_liboctave_error_handler) ("EIG: internal error");
-	      return -1;
+	      lambda.elem (j) = Complex (wr.elem (j));
+	      for (int i = 0; i < n; i++)
+		v.elem (i, j) = vr.elem (i, j);
 	    }
-
-	  for (int i = 0; i < n; i++)
+	  else
 	    {
-	      lambda.elem (j) = Complex (wr[j], wi[j]);
-	      lambda.elem (j+1) = Complex (wr[j+1], wi[j+1]);
-	      double real_part = vr.elem (i, j);
-	      double imag_part = vr.elem (i, j+1);
-	      v.elem (i, j) = Complex (real_part, imag_part);
-	      v.elem (i, j+1) = Complex (real_part, -imag_part);
+	      if (j+1 >= n)
+		{
+		  (*current_liboctave_error_handler) ("EIG: internal error");
+		  return -1;
+		}
+
+	      for (int i = 0; i < n; i++)
+		{
+		  lambda.elem (j) = Complex (wr.elem (j), wi.elem (j));
+		  lambda.elem (j+1) = Complex (wr.elem (j+1), wi.elem (j+1));
+		  double real_part = vr.elem (i, j);
+		  double imag_part = vr.elem (i, j+1);
+		  v.elem (i, j) = Complex (real_part, imag_part);
+		  v.elem (i, j+1) = Complex (real_part, -imag_part);
+		}
+	      j++;
 	    }
-	  j++;
 	}
     }
 
-  delete [] tmp_data;
-  delete [] wr;
-  delete [] wi;
-  delete [] work;
-
   return info;
 }
 
 int
 EIG::init (const ComplexMatrix& a)
 {
-  int a_nr = a.rows ();
-  if (a_nr != a.cols ())
+  int n = a.rows ();
+
+  if (n != a.cols ())
     {
       (*current_liboctave_error_handler) ("EIG requires square matrix");
       return -1;
     }
 
-  int n = a_nr;
-
   int info;
 
   lambda.resize (n);
   v.resize (n, n);
-
+  
   Complex *pw = lambda.fortran_vec ();
   Complex *pvr = v.fortran_vec ();
 
-  Complex *tmp_data = dup (a.data (), a.length ());
+  ComplexMatrix atmp = a;
+  Complex *tmp_data = atmp.fortran_vec ();
 
   int lwork = 8*n;
-  Complex *work = new Complex[lwork];
-  double *rwork = new double[4*n];
+
+  Array<Complex> work (lwork);
+  Complex *pwork = work.fortran_vec ();
+
+  Array<double> rwork (4*n);
+  double *prwork = rwork.fortran_vec ();
 
   Complex *dummy = 0;
   int idummy = 1;
 
-  F77_FCN (zgeev, ZGEEV) ("N", "V", n, tmp_data, n, pw, dummy, idummy,
-			  pvr, n, work, lwork, rwork, info, 1L, 1L);
+  F77_XFCN (zgeev, ZGEEV, ("N", "V", n, tmp_data, n, pw, dummy, idummy,
+			   pvr, n, pwork, lwork, prwork, info, 1L, 1L));
 
-  delete [] tmp_data;
-  delete [] work;
-  delete [] rwork;
+  if (f77_exception_encountered)
+    (*current_liboctave_error_handler) ("unrecoverable error in zgeev");
 
   return info;
 }
--- a/liboctave/EIG.h
+++ b/liboctave/EIG.h
@@ -66,6 +66,8 @@
       return *this;
     }
 
+  ~EIG (void) { }
+
   ComplexColumnVector eigenvalues (void) const { return lambda; }
 
   ComplexMatrix eigenvectors (void) const { return v; }