1 files changed, 81 insertions, 0 deletions
diff --git a/gsl-1.9/wavelet/haar.c b/gsl-1.9/wavelet/haar.c
new file mode 100644
index 0000000..8591cfd
--- /dev/null
+++ b/gsl-1.9/wavelet/haar.c
@@ -0,0 +1,81 @@
+/* wavelet/haar.c
+ * 
+ * Copyright (C) 2004 Ivo Alxneit
+ * 
+ * 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 program 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.
+ * 
+ * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+#include <config.h>
+#include <gsl/gsl_errno.h>
+#include <gsl/gsl_math.h>
+#include <gsl/gsl_wavelet.h>
+
+static const double ch_2[2] = { M_SQRT1_2, M_SQRT1_2 };
+static const double cg_2[2] = { M_SQRT1_2, -(M_SQRT1_2) };
+
+static int
+haar_init (const double **h1, const double **g1, const double **h2,
+           const double **g2, size_t * nc, size_t * offset,
+           const size_t member)
+{
+  if (member != 2)
+    {
+      return GSL_FAILURE;
+    }
+
+  *h1 = ch_2;
+  *g1 = cg_2;
+  *h2 = ch_2;
+  *g2 = cg_2;
+
+  *nc = 2;
+  *offset = 0;
+
+  return GSL_SUCCESS;
+}
+
+static int
+haar_centered_init (const double **h1, const double **g1, const double **h2,
+                    const double **g2, size_t * nc, size_t * offset,
+                    const size_t member)
+{
+  if (member != 2)
+    {
+      return GSL_FAILURE;
+    }
+
+  *h1 = ch_2;
+  *g1 = cg_2;
+  *h2 = ch_2;
+  *g2 = cg_2;
+
+  *nc = 2;
+  *offset = 1;
+
+  return GSL_SUCCESS;
+}
+
+static const gsl_wavelet_type haar_type = {
+  "haar",
+  &haar_init
+};
+
+static const gsl_wavelet_type haar_centered_type = {
+  "haar-centered",
+  &haar_centered_init
+};
+
+const gsl_wavelet_type *gsl_wavelet_haar = &haar_type;
+const gsl_wavelet_type *gsl_wavelet_haar_centered = &haar_centered_type;