Add convexity-constrained fitting and knot insertion

- New fitpack_convex_curve type wrapping concon (automatic knots) and
  cocosp (least-squares with given knots) for local convexity/concavity
  constraints on cubic splines
- Add insert_knot method to fitpack_curve (single and multiple, with
  automatic storage growth and periodic curve support)
- Add FP_BOOL comm helpers (size/pack/expand) for logical array
  round-trip communication
- Add CONCON_MAXBIN, CONCON_MAXTR, CONCON_QP_FAIL error constants
- 4 new tests: convex fit, convex least-squares, knot insertion,
  periodic knot insertion

Author: perazz

project/fitpack.cbp

@@ -90,7 +90,12 @@
 		<Unit filename="../src/fitpack_constrained_c.f90">
 			<Option weight="0" />
 		</Unit>
-		<Unit filename="../src/fitpack_core.F90" />
+		<Unit filename="../src/fitpack_convex_curves.f90">
+			<Option weight="0" />
+		</Unit>
+		<Unit filename="../src/fitpack_core.F90">
+			<Option weight="0" />
+		</Unit>
 		<Unit filename="../src/fitpack_core.f90">
 			<Option weight="0" />
 		</Unit>
@@ -103,7 +108,9 @@
 		<Unit filename="../src/fitpack_curves_c.f90">
 			<Option weight="0" />
 		</Unit>
-		<Unit filename="../src/fitpack_fitters.f90" />
+		<Unit filename="../src/fitpack_fitters.f90">
+			<Option weight="0" />
+		</Unit>
 		<Unit filename="../src/fitpack_grid_surfaces.f90">
 			<Option weight="0" />
 		</Unit>

project/fitpack.fdepend

@@ -1,45 +1,51 @@
 # fdepslib dependency file v1.1
-1771258224source:/Users/federico/code/fitpack/src/fitpack.f90
+1771352414source:/Users/federico/code/fitpack/src/fitpack.f90
 
 1704620662source:/Users/federico/code/fitpack/src/fitpack_closed_c.f90
 
 1704623491source:/Users/federico/code/fitpack/src/fitpack_constrained_c.f90
 
-1771258028source:/Users/federico/code/fitpack/src/fitpack_core.f90
+1771352396source:/Users/federico/code/fitpack/src/fitpack_convex_curves.f90
+
+1771352267source:/Users/federico/code/fitpack/src/fitpack_core.F90
+
+1771352267source:/Users/federico/code/fitpack/src/fitpack_core.f90
 
 1766849605source:/Users/federico/code/fitpack/src/fitpack_core_c.f90
 
-1771259882source:/Users/federico/code/fitpack/src/fitpack_curves.f90
+1771352308source:/Users/federico/code/fitpack/src/fitpack_curves.f90
 
 1764238257source:/Users/federico/code/fitpack/src/fitpack_curves_c.f90
 
-1771259888source:/Users/federico/code/fitpack/src/fitpack_grid_surfaces.f90
+1771259735source:/Users/federico/code/fitpack/src/fitpack_fitters.f90
+
+1771269940source:/Users/federico/code/fitpack/src/fitpack_grid_surfaces.f90
 
-1771259891source:/Users/federico/code/fitpack/src/fitpack_gridded_polar.f90
+1771269944source:/Users/federico/code/fitpack/src/fitpack_gridded_polar.f90
 
-1771259893source:/Users/federico/code/fitpack/src/fitpack_gridded_sphere.f90
+1771269947source:/Users/federico/code/fitpack/src/fitpack_gridded_sphere.f90
 
-1771259882source:/Users/federico/code/fitpack/src/fitpack_parametric.f90
+1771269934source:/Users/federico/code/fitpack/src/fitpack_parametric.f90
 
 1741628651source:/Users/federico/code/fitpack/src/fitpack_parametric_c.f90
 
-1771259895source:/Users/federico/code/fitpack/src/fitpack_parametric_surfaces.f90
+1771269941source:/Users/federico/code/fitpack/src/fitpack_parametric_surfaces.f90
 
 1703948614source:/Users/federico/code/fitpack/src/fitpack_periodic_curves_c.f90
 
-1771259887source:/Users/federico/code/fitpack/src/fitpack_polar.f90
+1771269943source:/Users/federico/code/fitpack/src/fitpack_polar.f90
 
-1771259889source:/Users/federico/code/fitpack/src/fitpack_spheres.f90
+1771269945source:/Users/federico/code/fitpack/src/fitpack_spheres.f90
 
-1771259882source:/Users/federico/code/fitpack/src/fitpack_surfaces.f90
+1771269938source:/Users/federico/code/fitpack/src/fitpack_surfaces.f90
 
 1704617612source:/Users/federico/code/fitpack/test/fitpack_cpp_tests.f90
 
-1771258900source:/Users/federico/code/fitpack/test/fitpack_curve_tests.f90
+1771352536source:/Users/federico/code/fitpack/test/fitpack_curve_tests.f90
 
 1740771300source:/Users/federico/code/fitpack/test/fitpack_test_data.f90
 
 1765036074source:/Users/federico/code/fitpack/test/fitpack_tests.f90
 
-1771258788source:/Users/federico/code/fitpack/test/test.f90
+1771352474source:/Users/federico/code/fitpack/test/test.f90
 

src/fitpack.f90

@@ -27,6 +27,7 @@ module fitpack
    use fitpack_gridded_sphere
    use fitpack_polar_domains
    use fitpack_sphere_domains
+   use fitpack_convex_curves
    use fitpack_parametric_curves
    use fitpack_parametric_surfaces
 
@@ -48,6 +49,7 @@ module fitpack
    public :: fitpack_periodic_curve
    public :: fitpack_parametric_curve
    public :: fitpack_constrained_curve
+   public :: fitpack_convex_curve
 
    public :: fitpack_polar
    public :: fitpack_grid_polar
@@ -71,6 +73,7 @@ module fitpack
    public :: FITPACK_TOO_MANY_KNOTS, FITPACK_OVERLAPPING_KNOTS, FITPACK_INVALID_RANGE
    public :: FITPACK_INPUT_ERROR, FITPACK_TEST_ERROR
    public :: FITPACK_INVALID_CONSTRAINT, FITPACK_INSUFFICIENT_KNOTS
+   public :: CONCON_MAXBIN, CONCON_MAXTR, CONCON_QP_FAIL
 
    ! Public interface: error utility functions
    public :: FITPACK_SUCCESS, FITPACK_MESSAGE, IOPT_MESSAGE