Use containers of labeled search paths instead of individual members

Manage classes of search paths in labeled containers.  This removes the
need to have a seperate member variable for each type of search path, but
also allows path types to be grouped togethor in various different ways
and manipulated as subsets of the full set of search paths.

1 files changed, 41 insertions, 0 deletions

diff --git a/Source/cmPathLabel.cxx b/Source/cmPathLabel.cxx
new file mode 100644
index 0000000000..67d56e180c
--- /dev/null
+++ b/Source/cmPathLabel.cxx
@@ -0,0 +1,41 @@
+/*============================================================================
+  CMake - Cross Platform Makefile Generator
+  Copyright 2000-2009 Kitware, Inc., Insight Software Consortium
+
+  Distributed under the OSI-approved BSD License (the "License");
+  see accompanying file Copyright.txt for details.
+
+  This software is distributed WITHOUT ANY WARRANTY; without even the
+  implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+  See the License for more information.
+============================================================================*/
+
+#include "cmPathLabel.h"
+
+//----------------------------------------------------------------------------
+cmPathLabel::cmPathLabel(const std::string& label)
+: Label(label), Hash(0)
+{
+  // Use a Jenkins one-at-a-time hash with under/over-flow protection
+  for(size_t i = 0; i < this->Label.size(); ++i)
+    {
+    this->Hash += this->Label[i];
+    this->Hash += ((this->Hash & 0x003FFFFF) << 10);
+    this->Hash ^= ((this->Hash & 0xFFFFFFC0) >> 6);
+    }
+  this->Hash += ((this->Hash & 0x1FFFFFFF) << 3);
+  this->Hash ^= ((this->Hash & 0xFFFFF800) >> 11);
+  this->Hash += ((this->Hash & 0x0001FFFF) << 15);
+}
+
+//----------------------------------------------------------------------------
+bool cmPathLabel::operator < (const cmPathLabel& l) const
+{
+  return this->Hash < l.Hash;
+}
+
+//----------------------------------------------------------------------------
+bool cmPathLabel::operator == (const cmPathLabel& l) const
+{
+  return this->Hash == l.Hash;
+}