Add find_ptr

configure.ac

@@ -194,6 +194,7 @@ AC_CONFIG_FILES([Makefile \
                  src/ctemplate/template_dictionary.h \
                  src/ctemplate/template_pathops.h \
                  src/ctemplate/template_namelist.h \
+                 src/ctemplate/find_ptr.h \
                  src/ctemplate/per_expand_data.h \
                  src/ctemplate/template_dictionary_interface.h \
                  ])

src/ctemplate/find_ptr.h.in

@@ -0,0 +1,70 @@
+// Copyright (c) 2012, Olaf van der Spek <olafvdspek@gmail.com>
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// ---
+// Author: Olaf van der Spek <olafvdspek@gmail.com>
+
+#ifndef TEMPLATE_FIND_PTR_H_
+#define TEMPLATE_FIND_PTR_H_
+
+@ac_windows_dllexport_defines@
+
+@ac_google_start_namespace@
+
+template <class T, class U>
+typename T::value_type::second_type* find_ptr(T& c, U v)
+{
+  typename T::iterator i = c.find(v);
+  return i == c.end() ? NULL : &i->second;
+}
+
+template <class T, class U>
+const typename T::value_type::second_type* find_ptr(const T& c, U v)
+{
+  typename T::const_iterator i = c.find(v);
+  return i == c.end() ? NULL : &i->second;
+}
+
+template <class T, class U>
+typename T::value_type::second_type find_ptr2(T& c, U v)
+{
+  typename T::iterator i = c.find(v);
+  return i == c.end() ? NULL : i->second;
+}
+
+template <class T, class U>
+const typename T::value_type::second_type find_ptr2(const T& c, U v)
+{
+  typename T::const_iterator i = c.find(v);
+  return i == c.end() ? NULL : i->second;
+}
+
+@ac_google_end_namespace@
+
+#endif // TEMPLATE_FIND_PTR_H_