Update libqt schmidt_add.cc to its final version

Removed by psi4/psi4#2927

libqt/schmidt_add.cc

@@ -3,23 +3,24 @@
  *
  * Psi4: an open-source quantum chemistry software package
  *
- * Copyright (c) 2007-2016 The Psi4 Developers.
+ * Copyright (c) 2007-2023 The Psi4 Developers.
  *
  * The copyrights for code used from other parties are included in
  * the corresponding files.
  *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
+ * This file is part of Psi4.
  *
- * This program is distributed in the hope that it will be useful,
+ * Psi4 is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, version 3.
+ *
+ * Psi4 is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
+ * GNU Lesser General Public License for more details.
  *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
+ * You should have received a copy of the GNU Lesser General Public License along
+ * with Psi4; if not, write to the Free Software Foundation, Inc.,
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * @END LICENSE
@@ -33,7 +34,10 @@
 
 #include <cstdio>
 #include <cmath>
+
+#include "psi4/pragma.h"
 #include "psi4/libciomr/libciomr.h"
+#include "psi4/libqt/qt.h"
 
 namespace psi {
 
@@ -57,26 +61,26 @@ namespace psi {
 ** Returns: 1 if a vector is added to A, 0 otherwise
 ** \ingroup QT
 */
-int schmidt_add(double **A, int rows, int cols, double *v)
-{
-   double dotval, normval ;
-   int i, I ;
+PSI_API int schmidt_add(double **A, int rows, int cols, double *v) {
+    double dotval, normval;
+    int i, I;
 
-   for (i=0; i<rows; i++) {
-      dot_arr(A[i], v, cols, &dotval) ;
-      for (I=0; I<cols; I++) v[I] -= dotval * A[i][I] ;
-      }
+    for (i = 0; i < rows; i++) {
+        // dot_arr(A[i], v, cols, &dotval) ;
+        dotval = C_DDOT(cols, A[i], 1, v, 1);
+        for (I = 0; I < cols; I++) v[I] -= dotval * A[i][I];
+    }
 
-   dot_arr(v, v, cols, &normval) ;
-   normval = sqrt(normval) ;
+    // dot_arr(v, v, cols, &normval) ;
+    normval = C_DDOT(cols, v, 1, v, 1);
+    normval = sqrt(normval);
 
-   if (normval < NORM_TOL)
-      return(0) ;
-   else {
-      if (A[rows] == NULL) A[rows] = init_array(cols) ;
-      for (I=0; I<cols; I++) A[rows][I] = v[I] / normval ;
-      return(1) ;
-      }
+    if (normval < NORM_TOL)
+        return (0);
+    else {
+        if (A[rows] == nullptr) A[rows] = init_array(cols);
+        for (I = 0; I < cols; I++) A[rows][I] = v[I] / normval;
+        return (1);
+    }
 }
-
 }