updated docs and website

Author: thchang

README.md

@@ -54,6 +54,7 @@ The physical organization is as follows.
    A test file `test_install.c` can be used for usage examples. This
    directory's internal README also contains best practices when calling
    Fortran from C/C++.
+ * `docs` contains the html source for generating the DelaunaySparse website.
  * `USAGE` provides additional detailed user information.
  * DelaunaySparse is shared under the MIT Software License, in the `LICENSE`
    file.

USAGE.md

@@ -1,4 +1,4 @@
-# Usage Information for using DELAUNAYSPARSE.
+# Usage Information for DELAUNAYSPARSE.
 
 DELAUNAYSPARSE solves the multivariate interpolation problem:
 

c_binding/LICENSE

@@ -0,0 +1,22 @@
+MIT License
+
+Copyright (c) 2020 Tyler H. Chang, Layne T. Watson, Thomas C. H. Lux,
+Ali R. Butt, Kirk W. Cameron, and Yili Hong.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

c_binding/Makefile

@@ -0,0 +1,25 @@
+FORT = gfortran
+CC = gcc
+CFLAGS = -c
+OPTS = -fopenmp 
+LIBS = blas.f lapack.f
+LEGACY = -std=legacy
+
+all: test_install.o delsparse_bind_c.o delsparse.o slatec.o delsparse.h
+	$(FORT) $(OPTS) test_install.o delsparse_bind_c.o delsparse.o slatec.o $(LIBS) -o test_install
+	./test_install
+
+test_install.o: test_install.c
+	$(CC) $(CFLAGS) test_install.c -o test_install.o
+
+delsparse_bind_c.o: delsparse_bind_c.f90 delsparse.o
+	$(FORT) $(CFLAGS) $(OPTS) delsparse_bind_c.f90 -o delsparse_bind_c.o
+
+delsparse.o: delsparse.f90 
+	$(FORT) $(CFLAGS) $(OPTS) delsparse.f90 -o delsparse.o
+
+slatec.o : slatec.f
+	$(FORT) $(CFLAGS) $(OPTS) $(LEGACY) slatec.f -o slatec.o
+
+clean:
+	rm -f *.o *.mod test_install

c_binding/README

@@ -0,0 +1,42 @@
+C bindings for the DELAUNAYSPARSE Fortran package.
+
+
+REQUIREMENTS:
+
+  A Fortran compiler that supports BIND(C).
+
+USAGE:
+
+  Use the C bindings in delsparse_bind_c.f90 to call DELAUNAYSPARSE from
+  inside a C/C++ program.
+
+  Because C does not support optional arguments, there are 4 variations of
+  DELAUNAYSPARSE{S|P}:
+   * c_delaunaysparse{s|p} accepts none of the optional arguments;
+   * c_delaunaysparse{s|p}_interp accepts an integer ir for specifying the
+     dimension of the response variables, plus the two variables needed
+     for computing the value of the interpolant, interp_in and interp_out;
+   * c_delaunaysparse{s|p}_opts accepts all of the optional arguments
+     EXCEPT interp_in and interp_out;
+   * c_delaunaysparse{s|p}_interp_opts accepts all of the optional arguments,
+     plus the response dimension ir, which cannot be inferred as it is by
+     the Fortran subroutines.
+
+  When using the 4 subroutines above, keep in mind the following:
+   * C passes by copy and Fortran passes by reference. Therefore, any non-array
+     type variable must be manually passed by address (i.e., by using the `&`
+     character);
+   * C matrices are stored in row major ordering, while Fortran stores in
+     column major ordering. Therefore, your data may need to be transposed
+     before calling any of the above subroutines;
+   * In C, a double-indexed array is treated as an array of pointers, whereas
+     Fortran expects a contiguous chunk of memory. Often, it is better to
+     allocate a one-dimensional array and manually index it, then pass this
+     "flat" array to the Fortran subroutine.
+
+  Usage examples are provided in the sample file, test_install.c.
+
+CONTRIBUTORS:
+
+  Tyler Chang, [email protected]
+