Merge pull request #80 from jacobwilliams/79-dfc

initial implementation of refactored dfc

Author: jacobwilliams

LICENSE

@@ -1,6 +1,6 @@
 BSPLINE-FORTRAN: Multidimensional B-Spline Interpolation of Data on a Regular Grid
 
-Copyright (c) 2015-2022, Jacob Williams
+Copyright (c) 2015-2023, Jacob Williams
 All rights reserved.
 
 Redistribution and use in source and binary forms, with or without modification,
@@ -61,3 +61,65 @@ loss of data, programs or equipment, and the unavailability or interruption of o
 This software is not intended to be used in any situation where a failure could cause risk
 of injury or damage to property.  The software was developed by NIST employees. NIST
 employee contributions are not subject to copyright protection within the United States.
+
+!-----------------------------------------------------------------------------------------
+! LAPACK License
+!-----------------------------------------------------------------------------------------
+
+Copyright (c) 1992-2022 The University of Tennessee and The University
+                        of Tennessee Research Foundation.  All rights
+                        reserved.
+Copyright (c) 2000-2022 The University of California Berkeley. All
+                        rights reserved.
+Copyright (c) 2006-2022 The University of Colorado Denver.  All rights
+                        reserved.
+
+$COPYRIGHT$
+
+Additional copyrights may follow
+
+$HEADER$
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+- Redistributions of source code must retain the above copyright
+  notice, this list of conditions and the following disclaimer.
+
+- Redistributions in binary form must reproduce the above copyright
+  notice, this list of conditions and the following disclaimer listed
+  in this license in the documentation and/or other materials
+  provided with the distribution.
+
+- Neither the name of the copyright holders nor the names of its
+  contributors may be used to endorse or promote products derived from
+  this software without specific prior written permission.
+
+The copyright holders provide no reassurances that the source code
+provided does not infringe any patent, copyright, or any other
+intellectual property rights of third parties.  The copyright holders
+disclaim any liability to any recipient for claims brought against
+recipient by any third party for infringement of that parties
+intellectual property rights.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+!-----------------------------------------------------------------------------------------
+!
+!  BSPLINE-FORTRAN includes code from the SLATEC Common Mathematical Library,
+!  A public domain work of the U.S. government.
+!
+!  https://netlib.org/slatec/
+!
+!-----------------------------------------------------------------------------------------

README.md

@@ -19,8 +19,7 @@ The library provides subroutines for 1D-6D interpolation and extrapolation using
 
 The core routines for the subroutine interface are:
 
-```Fortran
-
+```fortran
 !f(x)
 subroutine db1ink(x,nx,fcn,kx,iknot,tx,bcoef,iflag)
 subroutine db1val(xval,idx,tx,nx,kx,bcoef,f,iflag,inbvx,w0,extrap)
@@ -86,7 +85,7 @@ Note that extrapolation is not currently supported for these.
 
 ## Least squares fitting
 
-The BSpline-Fortran library also exports the `defc` subroutine, which can be used to fit B-spline polynomials to 1D data using a weighted least squares method.
+The BSpline-Fortran library also exports the `defc` subroutine, which can be used to fit B-spline polynomials to 1D data using a weighted least squares method. The `dfc` subroutine also allows for equality and inequality constraints to be imposed on the fitted curve. These procedures are not yet available in the object oriented interface.
 
 ## Examples