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extern/ustl/1.5/memlink.cc

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+// This file is part of the uSTL library, an STL implementation.
+//
+// Copyright (c) 2005 by Mike Sharov <msharov@users.sourceforge.net>
+// This file is free software, distributed under the MIT License.
+
+#include "mistream.h"
+#include "ustdxept.h"
+
+namespace ustl {
+
+/// Reads the object from stream \p s
+void memlink::read (istream& is)
+{
+    written_size_type n = 0;
+    is >> n;
+    if (!is.verify_remaining ("read", "ustl::memlink", n))
+	return;
+    if (n > size())
+	throw length_error ("memlink can not increase the size of the linked storage for reading");
+    resize (n);
+    is.read (data(), n);
+    is.align (alignof (n));
+}
+
+/// Fills the linked block with the given pattern.
+/// \arg start   Offset at which to start filling the linked block
+/// \arg p       Pointer to the pattern.
+/// \arg elSize  Size of the pattern.
+/// \arg elCount Number of times to write the pattern.
+/// Total number of bytes written is \p elSize * \p elCount.
+///
+void memlink::fill (iterator start, const void* p, size_type elSize, size_type elCount)
+{
+    assert (data() || !elCount || !elSize);
+    assert (start >= begin() && start + elSize * elCount <= end());
+    if (elSize == 1)
+	fill_n (start, elCount, *reinterpret_cast<const uint8_t*>(p));
+    else while (elCount--)
+	start = copy_n (const_iterator(p), elSize, start);
+}
+
+} // namespace ustl