1 files changed, 86 insertions, 0 deletions
diff --git a/gsl-1.9/vector/subvector_source.c b/gsl-1.9/vector/subvector_source.c
new file mode 100644
index 0000000..c7137ac
--- /dev/null
+++ b/gsl-1.9/vector/subvector_source.c
@@ -0,0 +1,86 @@
+/* vector/subvector_source.c
+ * 
+ * Copyright (C) 1996, 1997, 1998, 1999, 2000 Gerard Jungman, Brian Gough
+ * 
+ * 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.
+ */
+
+QUALIFIED_VIEW(_gsl_vector, view)
+FUNCTION(gsl_vector, subvector) (QUALIFIED_TYPE(gsl_vector) * v, size_t offset, size_t n)
+{
+  QUALIFIED_VIEW(_gsl_vector,view) view = NULL_VECTOR_VIEW;
+
+  if (n == 0)
+    {
+      GSL_ERROR_VAL ("vector length n must be positive integer", 
+                     GSL_EINVAL, view);
+    }
+
+  if (offset + (n - 1) >= v->size)
+    {
+      GSL_ERROR_VAL ("view would extend past end of vector", 
+                     GSL_EINVAL, view);
+    }
+
+  {
+    TYPE(gsl_vector) s = NULL_VECTOR;
+
+    s.data = v->data +  MULTIPLICITY * v->stride * offset ;
+    s.size = n;
+    s.stride = v->stride;
+    s.block = v->block;
+    s.owner = 0;
+
+    view.vector = s;
+    return view;
+  }
+}
+
+QUALIFIED_VIEW(_gsl_vector, view)
+FUNCTION(gsl_vector, subvector_with_stride) (QUALIFIED_TYPE(gsl_vector) * v, size_t offset, size_t stride, size_t n)
+{
+  QUALIFIED_VIEW(_gsl_vector,view) view = NULL_VECTOR_VIEW;
+
+  if (n == 0)
+    {
+      GSL_ERROR_VAL ("vector length n must be positive integer", 
+                     GSL_EINVAL, view);
+    }
+
+  if (stride == 0)
+    {
+      GSL_ERROR_VAL ("stride must be positive integer", 
+                     GSL_EINVAL, view);
+    }
+
+  if (offset + (n - 1) * stride >= v->size)
+    {
+      GSL_ERROR_VAL ("view would extend past end of vector", 
+                     GSL_EINVAL, view);
+    }
+
+  {
+    TYPE(gsl_vector) s = NULL_VECTOR;
+
+    s.data = v->data + MULTIPLICITY * v->stride * offset ;
+    s.size = n;
+    s.stride = v->stride * stride;
+    s.block = v->block;
+    s.owner = 0;
+    
+    view.vector = s;
+    return view;
+  }
+}