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authorJing Yu <jingyu@google.com>2010-07-22 14:03:48 -0700
committerJing Yu <jingyu@google.com>2010-07-22 14:03:48 -0700
commitb094d6c4bf572654a031ecc4afe675154c886dc5 (patch)
tree89394c56b05e13a5413ee60237d65b0214fd98e2 /gcc-4.4.3/libstdc++-v3/include/tr1_impl/functional_hash.h
parentdc34721ac3bf7e3c406fba8cfe9d139393345ec5 (diff)
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commit gcc-4.4.3 which is used to build gcc-4.4.3 Android toolchain in master.
The source is based on fsf gcc-4.4.3 and contains local patches which are recorded in gcc-4.4.3/README.google. Change-Id: Id8c6d6927df274ae9749196a1cc24dbd9abc9887
Diffstat (limited to 'gcc-4.4.3/libstdc++-v3/include/tr1_impl/functional_hash.h')
-rw-r--r--gcc-4.4.3/libstdc++-v3/include/tr1_impl/functional_hash.h183
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diff --git a/gcc-4.4.3/libstdc++-v3/include/tr1_impl/functional_hash.h b/gcc-4.4.3/libstdc++-v3/include/tr1_impl/functional_hash.h
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+++ b/gcc-4.4.3/libstdc++-v3/include/tr1_impl/functional_hash.h
@@ -0,0 +1,183 @@
+// TR1 functional -*- C++ -*-
+
+// Copyright (C) 2007, 2008, 2009 Free Software Foundation, Inc.
+//
+// This file is part of the GNU ISO C++ Library. This library 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 3, or (at your option)
+// any later version.
+
+// This library 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.
+
+// Under Section 7 of GPL version 3, you are granted additional
+// permissions described in the GCC Runtime Library Exception, version
+// 3.1, as published by the Free Software Foundation.
+
+// You should have received a copy of the GNU General Public License and
+// a copy of the GCC Runtime Library Exception along with this program;
+// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
+// <http://www.gnu.org/licenses/>.
+
+/** @file tr1_impl/functional_hash.h
+ * This is an internal header file, included by other library headers.
+ * You should not attempt to use it directly.
+ */
+
+namespace std
+{
+_GLIBCXX_BEGIN_NAMESPACE_TR1
+
+ /// Class template hash.
+ // Declaration of default hash functor std::tr1::hash. The types for
+ // which std::tr1::hash<T> is well-defined is in clause 6.3.3. of the PDTR.
+ template<typename _Tp>
+ struct hash : public std::unary_function<_Tp, size_t>
+ {
+ size_t
+ operator()(_Tp __val) const;
+ };
+
+ /// Partial specializations for pointer types.
+ template<typename _Tp>
+ struct hash<_Tp*> : public std::unary_function<_Tp*, size_t>
+ {
+ size_t
+ operator()(_Tp* __p) const
+ { return reinterpret_cast<size_t>(__p); }
+ };
+
+ /// Explicit specializations for integer types.
+#define _TR1_hashtable_define_trivial_hash(_Tp) \
+ template<> \
+ inline size_t \
+ hash<_Tp>::operator()(_Tp __val) const \
+ { return static_cast<size_t>(__val); }
+
+ _TR1_hashtable_define_trivial_hash(bool);
+ _TR1_hashtable_define_trivial_hash(char);
+ _TR1_hashtable_define_trivial_hash(signed char);
+ _TR1_hashtable_define_trivial_hash(unsigned char);
+ _TR1_hashtable_define_trivial_hash(wchar_t);
+#ifdef _GLIBCXX_INCLUDE_AS_CXX0X
+ _TR1_hashtable_define_trivial_hash(char16_t);
+ _TR1_hashtable_define_trivial_hash(char32_t);
+#endif
+ _TR1_hashtable_define_trivial_hash(short);
+ _TR1_hashtable_define_trivial_hash(int);
+ _TR1_hashtable_define_trivial_hash(long);
+ _TR1_hashtable_define_trivial_hash(long long);
+ _TR1_hashtable_define_trivial_hash(unsigned short);
+ _TR1_hashtable_define_trivial_hash(unsigned int);
+ _TR1_hashtable_define_trivial_hash(unsigned long);
+ _TR1_hashtable_define_trivial_hash(unsigned long long);
+
+#undef _TR1_hashtable_define_trivial_hash
+
+ // Fowler / Noll / Vo (FNV) Hash (type FNV-1a)
+ // (Used by the next specializations of std::tr1::hash.)
+
+ /// Dummy generic implementation (for sizeof(size_t) != 4, 8).
+ template<size_t = sizeof(size_t)>
+ struct _Fnv_hash
+ {
+ static size_t
+ hash(const char* __first, size_t __length)
+ {
+ size_t __result = 0;
+ for (; __length > 0; --__length)
+ __result = (__result * 131) + *__first++;
+ return __result;
+ }
+ };
+
+ template<>
+ struct _Fnv_hash<4>
+ {
+ static size_t
+ hash(const char* __first, size_t __length)
+ {
+ size_t __result = static_cast<size_t>(2166136261UL);
+ for (; __length > 0; --__length)
+ {
+ __result ^= static_cast<size_t>(*__first++);
+ __result *= static_cast<size_t>(16777619UL);
+ }
+ return __result;
+ }
+ };
+
+ template<>
+ struct _Fnv_hash<8>
+ {
+ static size_t
+ hash(const char* __first, size_t __length)
+ {
+ size_t __result =
+ static_cast<size_t>(14695981039346656037ULL);
+ for (; __length > 0; --__length)
+ {
+ __result ^= static_cast<size_t>(*__first++);
+ __result *= static_cast<size_t>(1099511628211ULL);
+ }
+ return __result;
+ }
+ };
+
+ /// Explicit specializations for float.
+ template<>
+ inline size_t
+ hash<float>::operator()(float __val) const
+ {
+ size_t __result = 0;
+
+ // 0 and -0 both hash to zero.
+ if (__val != 0.0f)
+ __result = _Fnv_hash<>::hash(reinterpret_cast<const char*>(&__val),
+ sizeof(__val));
+ return __result;
+ };
+
+ /// Explicit specializations for double.
+ template<>
+ inline size_t
+ hash<double>::operator()(double __val) const
+ {
+ size_t __result = 0;
+
+ // 0 and -0 both hash to zero.
+ if (__val != 0.0)
+ __result = _Fnv_hash<>::hash(reinterpret_cast<const char*>(&__val),
+ sizeof(__val));
+ return __result;
+ };
+
+ /// Explicit specializations for long double.
+ template<>
+ size_t
+ hash<long double>::operator()(long double __val) const;
+
+ /// Explicit specialization of member operator for non-builtin types.
+ template<>
+ size_t
+ hash<string>::operator()(string) const;
+
+ template<>
+ size_t
+ hash<const string&>::operator()(const string&) const;
+
+#ifdef _GLIBCXX_USE_WCHAR_T
+ template<>
+ size_t
+ hash<wstring>::operator()(wstring) const;
+
+ template<>
+ size_t
+ hash<const wstring&>::operator()(const wstring&) const;
+#endif
+
+_GLIBCXX_END_NAMESPACE_TR1
+}