Merging upstream version 1.44.3.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 38 insertions, 0 deletions

diff --git a/ml/dlib/dlib/array/array_tools.h b/ml/dlib/dlib/array/array_tools.h
new file mode 100644
index 000000000..fce634396
--- /dev/null
+++ b/ml/dlib/dlib/array/array_tools.h
@@ -0,0 +1,38 @@
+// Copyright (C) 2013  Davis E. King (davis@dlib.net)
+// License: Boost Software License   See LICENSE.txt for the full license.
+#ifndef DLIB_ARRAY_tOOLS_H_
+#define DLIB_ARRAY_tOOLS_H_
+
+#include "../assert.h"
+#include "array_tools_abstract.h"
+
+namespace dlib
+{
+    template <typename T>
+    void split_array (
+        T& a,
+        T& b,
+        double frac
+    )
+    {
+        // make sure requires clause is not broken
+        DLIB_ASSERT(0 <= frac && frac <= 1,
+            "\t void split_array()"
+            << "\n\t frac must be between 0 and 1."
+            << "\n\t frac: " << frac
+            );
+
+        const unsigned long asize = static_cast<unsigned long>(a.size()*frac);
+        const unsigned long bsize = a.size()-asize;
+
+        b.resize(bsize);
+        for (unsigned long i = 0; i < b.size(); ++i)
+        {
+            swap(b[i], a[i+asize]);
+        }
+        a.resize(asize);
+    }
+}
+
+#endif // DLIB_ARRAY_tOOLS_H_
+