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Diffstat (limited to 'include/utils/TypeHelpers.h')
| -rw-r--r-- | include/utils/TypeHelpers.h | 254 |
1 files changed, 0 insertions, 254 deletions
diff --git a/include/utils/TypeHelpers.h b/include/utils/TypeHelpers.h deleted file mode 100644 index c04c37f..0000000 --- a/include/utils/TypeHelpers.h +++ /dev/null @@ -1,254 +0,0 @@ -/* - * Copyright (C) 2005 The Android Open Source Project - * - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ - -#ifndef ANDROID_TYPE_HELPERS_H -#define ANDROID_TYPE_HELPERS_H - -#include <new> -#include <stdint.h> -#include <string.h> -#include <sys/types.h> - -// --------------------------------------------------------------------------- - -namespace android { - -/* - * Types traits - */ - -template <typename T> struct trait_trivial_ctor { enum { value = false }; }; -template <typename T> struct trait_trivial_dtor { enum { value = false }; }; -template <typename T> struct trait_trivial_copy { enum { value = false }; }; -template <typename T> struct trait_trivial_assign{ enum { value = false }; }; - -template <typename T> struct trait_pointer { enum { value = false }; }; -template <typename T> struct trait_pointer<T*> { enum { value = true }; }; - -#define ANDROID_BASIC_TYPES_TRAITS( T ) \ - template<> struct trait_trivial_ctor< T > { enum { value = true }; }; \ - template<> struct trait_trivial_dtor< T > { enum { value = true }; }; \ - template<> struct trait_trivial_copy< T > { enum { value = true }; }; \ - template<> struct trait_trivial_assign< T >{ enum { value = true }; }; - -#define ANDROID_TYPE_TRAITS( T, ctor, dtor, copy, assign ) \ - template<> struct trait_trivial_ctor< T > { enum { value = ctor }; }; \ - template<> struct trait_trivial_dtor< T > { enum { value = dtor }; }; \ - template<> struct trait_trivial_copy< T > { enum { value = copy }; }; \ - template<> struct trait_trivial_assign< T >{ enum { value = assign }; }; - -template <typename TYPE> -struct traits { - enum { - is_pointer = trait_pointer<TYPE>::value, - has_trivial_ctor = is_pointer || trait_trivial_ctor<TYPE>::value, - has_trivial_dtor = is_pointer || trait_trivial_dtor<TYPE>::value, - has_trivial_copy = is_pointer || trait_trivial_copy<TYPE>::value, - has_trivial_assign = is_pointer || trait_trivial_assign<TYPE>::value - }; -}; - -template <typename T, typename U> -struct aggregate_traits { - enum { - is_pointer = false, - has_trivial_ctor = traits<T>::has_trivial_ctor && traits<U>::has_trivial_ctor, - has_trivial_dtor = traits<T>::has_trivial_dtor && traits<U>::has_trivial_dtor, - has_trivial_copy = traits<T>::has_trivial_copy && traits<U>::has_trivial_copy, - has_trivial_assign = traits<T>::has_trivial_assign && traits<U>::has_trivial_assign - }; -}; - -// --------------------------------------------------------------------------- - -/* - * basic types traits - */ - -ANDROID_BASIC_TYPES_TRAITS( void ); -ANDROID_BASIC_TYPES_TRAITS( bool ); -ANDROID_BASIC_TYPES_TRAITS( char ); -ANDROID_BASIC_TYPES_TRAITS( unsigned char ); -ANDROID_BASIC_TYPES_TRAITS( short ); -ANDROID_BASIC_TYPES_TRAITS( unsigned short ); -ANDROID_BASIC_TYPES_TRAITS( int ); -ANDROID_BASIC_TYPES_TRAITS( unsigned int ); -ANDROID_BASIC_TYPES_TRAITS( long ); -ANDROID_BASIC_TYPES_TRAITS( unsigned long ); -ANDROID_BASIC_TYPES_TRAITS( long long ); -ANDROID_BASIC_TYPES_TRAITS( unsigned long long ); -ANDROID_BASIC_TYPES_TRAITS( float ); -ANDROID_BASIC_TYPES_TRAITS( double ); - -// --------------------------------------------------------------------------- - - -/* - * compare and order types - */ - -template<typename TYPE> inline -int strictly_order_type(const TYPE& lhs, const TYPE& rhs) { - return (lhs < rhs) ? 1 : 0; -} - -template<typename TYPE> inline -int compare_type(const TYPE& lhs, const TYPE& rhs) { - return strictly_order_type(rhs, lhs) - strictly_order_type(lhs, rhs); -} - -/* - * create, destroy, copy and assign types... - */ - -template<typename TYPE> inline -void construct_type(TYPE* p, size_t n) { - if (!traits<TYPE>::has_trivial_ctor) { - while (n--) { - new(p++) TYPE; - } - } -} - -template<typename TYPE> inline -void destroy_type(TYPE* p, size_t n) { - if (!traits<TYPE>::has_trivial_dtor) { - while (n--) { - p->~TYPE(); - p++; - } - } -} - -template<typename TYPE> inline -void copy_type(TYPE* d, const TYPE* s, size_t n) { - if (!traits<TYPE>::has_trivial_copy) { - while (n--) { - new(d) TYPE(*s); - d++, s++; - } - } else { - memcpy(d,s,n*sizeof(TYPE)); - } -} - -template<typename TYPE> inline -void assign_type(TYPE* d, const TYPE* s, size_t n) { - if (!traits<TYPE>::has_trivial_assign) { - while (n--) { - *d++ = *s++; - } - } else { - memcpy(d,s,n*sizeof(TYPE)); - } -} - -template<typename TYPE> inline -void splat_type(TYPE* where, const TYPE* what, size_t n) { - if (!traits<TYPE>::has_trivial_copy) { - while (n--) { - new(where) TYPE(*what); - where++; - } - } else { - while (n--) { - *where++ = *what; - } - } -} - -template<typename TYPE> inline -void move_forward_type(TYPE* d, const TYPE* s, size_t n = 1) { - if (!traits<TYPE>::has_trivial_copy || !traits<TYPE>::has_trivial_dtor) { - d += n; - s += n; - while (n--) { - --d, --s; - if (!traits<TYPE>::has_trivial_copy) { - new(d) TYPE(*s); - } else { - *d = *s; - } - if (!traits<TYPE>::has_trivial_dtor) { - s->~TYPE(); - } - } - } else { - memmove(d,s,n*sizeof(TYPE)); - } -} - -template<typename TYPE> inline -void move_backward_type(TYPE* d, const TYPE* s, size_t n = 1) { - if (!traits<TYPE>::has_trivial_copy || !traits<TYPE>::has_trivial_dtor) { - while (n--) { - if (!traits<TYPE>::has_trivial_copy) { - new(d) TYPE(*s); - } else { - *d = *s; - } - if (!traits<TYPE>::has_trivial_dtor) { - s->~TYPE(); - } - d++, s++; - } - } else { - memmove(d,s,n*sizeof(TYPE)); - } -} -// --------------------------------------------------------------------------- - -/* - * a key/value pair - */ - -template <typename KEY, typename VALUE> -struct key_value_pair_t { - KEY key; - VALUE value; - key_value_pair_t() { } - key_value_pair_t(const key_value_pair_t& o) : key(o.key), value(o.value) { } - key_value_pair_t(const KEY& k, const VALUE& v) : key(k), value(v) { } - key_value_pair_t(const KEY& k) : key(k) { } - inline bool operator < (const key_value_pair_t& o) const { - return strictly_order_type(key, o.key); - } -}; - -template<> -template <typename K, typename V> -struct trait_trivial_ctor< key_value_pair_t<K, V> > -{ enum { value = aggregate_traits<K,V>::has_trivial_ctor }; }; -template<> -template <typename K, typename V> -struct trait_trivial_dtor< key_value_pair_t<K, V> > -{ enum { value = aggregate_traits<K,V>::has_trivial_dtor }; }; -template<> -template <typename K, typename V> -struct trait_trivial_copy< key_value_pair_t<K, V> > -{ enum { value = aggregate_traits<K,V>::has_trivial_copy }; }; -template<> -template <typename K, typename V> -struct trait_trivial_assign< key_value_pair_t<K, V> > -{ enum { value = aggregate_traits<K,V>::has_trivial_assign};}; - -// --------------------------------------------------------------------------- - -}; // namespace android - -// --------------------------------------------------------------------------- - -#endif // ANDROID_TYPE_HELPERS_H |