Moved over Legendre transforms from Commander project

libsharp/sharp_legendre.h

@@ -0,0 +1,62 @@
+/*
+ *  This file is part of libsharp.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * met:
+ * 
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 
+ * 3. Neither the name of the copyright holder nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ * 
+ * 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
+ * HOLDER 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.
+ */
+
+/*! \file sharp_legendre.h
+ *  Interface for the Legendre transform parts of the spherical transform library.
+ *
+ *  Copyright (C) 2015 University of Oslo
+ *  \author Dag Sverre Seljebotn
+ */
+
+#ifndef SHARP_LEGENDRE_H
+#define SHARP_LEGENDRE_H
+
+#include <stddef.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifndef NO_LEGENDRE
+
+void sharp_legendre_transform(double *bl, double *recfac, ptrdiff_t lmax, double *x,
+                              double *out, ptrdiff_t nx);
+void sharp_legendre_transform_s(float *bl, float *recfac, ptrdiff_t lmax, float *x,
+                                float *out, ptrdiff_t nx);
+void sharp_legendre_transform_recfac(double *r, ptrdiff_t lmax);
+void sharp_legendre_transform_recfac_s(float *r, ptrdiff_t lmax);
+
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif