stl_hash_map.h

// Filename:    stl_hash_map.h

// Comment By:  凝霜

// E-mail:      mdl2009@vip.qq.com

// Blog:        http://blog.csdn.net/mdl13412

// hash_map和hash_multimap是对hashtable的简单包装, 很容易理解

/*

 * Copyright (c) 1996

 * Silicon Graphics Computer Systems, Inc.

 *

 * Permission to use, copy, modify, distribute and sell this software

 * and its documentation for any purpose is hereby granted without fee,

 * provided that the above copyright notice appear in all copies and

 * that both that copyright notice and this permission notice appear

 * in supporting documentation.  Silicon Graphics makes no

 * representations about the suitability of this software for any

 * purpose.  It is provided "as is" without express or implied warranty.

 *

 *

 * Copyright (c) 1994

 * Hewlett-Packard Company

 *

 * Permission to use, copy, modify, distribute and sell this software

 * and its documentation for any purpose is hereby granted without fee,

 * provided that the above copyright notice appear in all copies and

 * that both that copyright notice and this permission notice appear

 * in supporting documentation.  Hewlett-Packard Company makes no

 * representations about the suitability of this software for any

 * purpose.  It is provided "as is" without express or implied warranty.

 *

 */

/* NOTE: This is an internal header file, included by other STL headers.

 *   You should not attempt to use it directly.

 */

#ifndef __SGI_STL_INTERNAL_HASH_MAP_H

#define __SGI_STL_INTERNAL_HASH_MAP_H

__STL_BEGIN_NAMESPACE

#if defined(__sgi) && !defined(__GNUC__) && (_MIPS_SIM != _MIPS_SIM_ABI32)

#pragma set woff 1174

#endif

// 如果编译器不能根据前面模板参数推导出后面使用的默认参数类型,

// 那么就需要手工指定, 并且对于基本的数据类型, 在<stl_hash_fun.h>

// 中都提供hash函数

#ifndef __STL_LIMITED_DEFAULT_TEMPLATES

template <class Key, class T, class HashFcn = hash<Key>,

          class EqualKey = equal_to<Key>,

          class Alloc = alloc>

#else

template <class Key, class T, class HashFcn, class EqualKey,

          class Alloc = alloc>

#endif

class hash_map

{

private:

  typedef hashtable<pair<const Key, T>, Key, HashFcn,

                    select1st<pair<const Key, T> >, EqualKey, Alloc> ht;

  ht rep;

public:

  // 注意: reference, pointer, iterator都为const, 因为不能修改hashtable

  // 内部的元素, 否则会导致hashtable失效

  typedef typename ht::key_type key_type;

  typedef T data_type;

  typedef T mapped_type;

  typedef typename ht::value_type value_type;

  typedef typename ht::hasher hasher;

  typedef typename ht::key_equal key_equal;

  typedef typename ht::size_type size_type;

  typedef typename ht::difference_type difference_type;

  typedef typename ht::pointer pointer;

  typedef typename ht::const_pointer const_pointer;

  typedef typename ht::reference reference;

  typedef typename ht::const_reference const_reference;

  typedef typename ht::iterator iterator;

  typedef typename ht::const_iterator const_iterator;

  // 返回hash相关函数

  hasher hash_funct() const { return rep.hash_funct(); }

  key_equal key_eq() const { return rep.key_eq(); }

public:

  hash_map() : rep(, hasher(), key_equal()) {}

  explicit hash_map(size_type n) : rep(n, hasher(), key_equal()) {}

  hash_map(size_type n, const hasher& hf) : rep(n, hf, key_equal()) {}

  hash_map(size_type n, const hasher& hf, const key_equal& eql)

    : rep(n, hf, eql) {}

#ifdef __STL_MEMBER_TEMPLATES

  template <class InputIterator>

  hash_map(InputIterator f, InputIterator l)

    : rep(, hasher(), key_equal()) { rep.insert_unique(f, l); }

  template <class InputIterator>

  hash_map(InputIterator f, InputIterator l, size_type n)

    : rep(n, hasher(), key_equal()) { rep.insert_unique(f, l); }

  template <class InputIterator>

  hash_map(InputIterator f, InputIterator l, size_type n,

           const hasher& hf)

    : rep(n, hf, key_equal()) { rep.insert_unique(f, l); }

  template <class InputIterator>

  hash_map(InputIterator f, InputIterator l, size_type n,

           const hasher& hf, const key_equal& eql)

    : rep(n, hf, eql) { rep.insert_unique(f, l); }

#else

  hash_map(const value_type* f, const value_type* l)

    : rep(, hasher(), key_equal()) { rep.insert_unique(f, l); }

  hash_map(const value_type* f, const value_type* l, size_type n)

    : rep(n, hasher(), key_equal()) { rep.insert_unique(f, l); }

  hash_map(const value_type* f, const value_type* l, size_type n,

           const hasher& hf)

    : rep(n, hf, key_equal()) { rep.insert_unique(f, l); }

  hash_map(const value_type* f, const value_type* l, size_type n,

           const hasher& hf, const key_equal& eql)

    : rep(n, hf, eql) { rep.insert_unique(f, l); }

  hash_map(const_iterator f, const_iterator l)

    : rep(, hasher(), key_equal()) { rep.insert_unique(f, l); }

  hash_map(const_iterator f, const_iterator l, size_type n)

    : rep(n, hasher(), key_equal()) { rep.insert_unique(f, l); }

  hash_map(const_iterator f, const_iterator l, size_type n,

           const hasher& hf)

    : rep(n, hf, key_equal()) { rep.insert_unique(f, l); }

  hash_map(const_iterator f, const_iterator l, size_type n,

           const hasher& hf, const key_equal& eql)

    : rep(n, hf, eql) { rep.insert_unique(f, l); }

#endif /*__STL_MEMBER_TEMPLATES */

public:

  // 下面都是对hashtable的简单封装, 见<stl_hashtable.h>

  size_type size() const { return rep.size(); }

  size_type max_size() const { return rep.max_size(); }

  bool empty() const { return rep.empty(); }

  void swap(hash_map& hs) { rep.swap(hs.rep); }

  friend bool

  operator== __STL_NULL_TMPL_ARGS (const hash_map&, const hash_map&);

  iterator begin() { return rep.begin(); }

  iterator end() { return rep.end(); }

  const_iterator begin() const { return rep.begin(); }

  const_iterator end() const { return rep.end(); }

public:

  // 不允许插入key相同的元素

  pair<iterator, bool> insert(const value_type& obj)

    { return rep.insert_unique(obj); }

#ifdef __STL_MEMBER_TEMPLATES

  template <class InputIterator>

  void insert(InputIterator f, InputIterator l) { rep.insert_unique(f,l); }

#else

  void insert(const value_type* f, const value_type* l) {

    rep.insert_unique(f,l);

  }

  void insert(const_iterator f, const_iterator l) { rep.insert_unique(f, l); }

#endif /*__STL_MEMBER_TEMPLATES */

  pair<iterator, bool> insert_noresize(const value_type& obj)

    { return rep.insert_unique_noresize(obj); }

  iterator find(const key_type& key) { return rep.find(key); }

  const_iterator find(const key_type& key) const { return rep.find(key); }

  // 如果key存在则返回对应的元素, 否则新建一个key

  T& operator[](const key_type& key)

  {

    return rep.find_or_insert(value_type(key, T())).second;

  }

  // 下面封装见<stl_hashtable.h>

  size_type count(const key_type& key) const { return rep.count(key); }

  pair<iterator, iterator> equal_range(const key_type& key)

    { return rep.equal_range(key); }

  pair<const_iterator, const_iterator> equal_range(const key_type& key) const

    { return rep.equal_range(key); }

  size_type erase(const key_type& key) {return rep.erase(key); }

  void erase(iterator it) { rep.erase(it); }

  void erase(iterator f, iterator l) { rep.erase(f, l); }

  void clear() { rep.clear(); }

public:

  void resize(size_type hint) { rep.resize(hint); }

  size_type bucket_count() const { return rep.bucket_count(); }

  size_type max_bucket_count() const { return rep.max_bucket_count(); }

  size_type elems_in_bucket(size_type n) const

    { return rep.elems_in_bucket(n); }

};

template <class Key, class T, class HashFcn, class EqualKey, class Alloc>

inline bool operator==(const hash_map<Key, T, HashFcn, EqualKey, Alloc>& hm1,

                       const hash_map<Key, T, HashFcn, EqualKey, Alloc>& hm2)

{

  return hm1.rep == hm2.rep;

}

// 如果编译器支持模板函数特化优先级

// 那么将全局的swap实现为使用hash_map私有的swap以提高效率

#ifdef __STL_FUNCTION_TMPL_PARTIAL_ORDER

template <class Key, class T, class HashFcn, class EqualKey, class Alloc>

inline void swap(hash_map<Key, T, HashFcn, EqualKey, Alloc>& hm1,

                 hash_map<Key, T, HashFcn, EqualKey, Alloc>& hm2)

{

  hm1.swap(hm2);

}

#endif /* __STL_FUNCTION_TMPL_PARTIAL_ORDER */

// hash_multimap和hash_map除去允许key重复外, 其余性质一致

#ifndef __STL_LIMITED_DEFAULT_TEMPLATES

template <class Key, class T, class HashFcn = hash<Key>,

          class EqualKey = equal_to<Key>,

          class Alloc = alloc>

#else

template <class Key, class T, class HashFcn, class EqualKey,

          class Alloc = alloc>

#endif

class hash_multimap

{

private:

  typedef hashtable<pair<const Key, T>, Key, HashFcn,

                    select1st<pair<const Key, T> >, EqualKey, Alloc> ht;

  ht rep;

public:

  typedef typename ht::key_type key_type;

  typedef T data_type;

  typedef T mapped_type;

  typedef typename ht::value_type value_type;

  typedef typename ht::hasher hasher;

  typedef typename ht::key_equal key_equal;

  typedef typename ht::size_type size_type;

  typedef typename ht::difference_type difference_type;

  typedef typename ht::pointer pointer;

  typedef typename ht::const_pointer const_pointer;

  typedef typename ht::reference reference;

  typedef typename ht::const_reference const_reference;

  typedef typename ht::iterator iterator;

  typedef typename ht::const_iterator const_iterator;

  hasher hash_funct() const { return rep.hash_funct(); }

  key_equal key_eq() const { return rep.key_eq(); }

public:

  hash_multimap() : rep(, hasher(), key_equal()) {}

  explicit hash_multimap(size_type n) : rep(n, hasher(), key_equal()) {}

  hash_multimap(size_type n, const hasher& hf) : rep(n, hf, key_equal()) {}

  hash_multimap(size_type n, const hasher& hf, const key_equal& eql)

    : rep(n, hf, eql) {}

#ifdef __STL_MEMBER_TEMPLATES

  template <class InputIterator>

  hash_multimap(InputIterator f, InputIterator l)

    : rep(, hasher(), key_equal()) { rep.insert_equal(f, l); }

  template <class InputIterator>

  hash_multimap(InputIterator f, InputIterator l, size_type n)

    : rep(n, hasher(), key_equal()) { rep.insert_equal(f, l); }

  template <class InputIterator>

  hash_multimap(InputIterator f, InputIterator l, size_type n,

                const hasher& hf)

    : rep(n, hf, key_equal()) { rep.insert_equal(f, l); }

  template <class InputIterator>

  hash_multimap(InputIterator f, InputIterator l, size_type n,

                const hasher& hf, const key_equal& eql)

    : rep(n, hf, eql) { rep.insert_equal(f, l); }

#else

  hash_multimap(const value_type* f, const value_type* l)

    : rep(, hasher(), key_equal()) { rep.insert_equal(f, l); }

  hash_multimap(const value_type* f, const value_type* l, size_type n)

    : rep(n, hasher(), key_equal()) { rep.insert_equal(f, l); }

  hash_multimap(const value_type* f, const value_type* l, size_type n,

                const hasher& hf)

    : rep(n, hf, key_equal()) { rep.insert_equal(f, l); }

  hash_multimap(const value_type* f, const value_type* l, size_type n,

                const hasher& hf, const key_equal& eql)

    : rep(n, hf, eql) { rep.insert_equal(f, l); }

  hash_multimap(const_iterator f, const_iterator l)

    : rep(, hasher(), key_equal()) { rep.insert_equal(f, l); }

  hash_multimap(const_iterator f, const_iterator l, size_type n)

    : rep(n, hasher(), key_equal()) { rep.insert_equal(f, l); }

  hash_multimap(const_iterator f, const_iterator l, size_type n,

                const hasher& hf)

    : rep(n, hf, key_equal()) { rep.insert_equal(f, l); }

  hash_multimap(const_iterator f, const_iterator l, size_type n,

                const hasher& hf, const key_equal& eql)

    : rep(n, hf, eql) { rep.insert_equal(f, l); }

#endif /*__STL_MEMBER_TEMPLATES */

public:

  size_type size() const { return rep.size(); }

  size_type max_size() const { return rep.max_size(); }

  bool empty() const { return rep.empty(); }

  void swap(hash_multimap& hs) { rep.swap(hs.rep); }

  friend bool

  operator== __STL_NULL_TMPL_ARGS (const hash_multimap&, const hash_multimap&);

  iterator begin() { return rep.begin(); }

  iterator end() { return rep.end(); }

  const_iterator begin() const { return rep.begin(); }

  const_iterator end() const { return rep.end(); }

public:

  iterator insert(const value_type& obj) { return rep.insert_equal(obj); }

#ifdef __STL_MEMBER_TEMPLATES

  template <class InputIterator>

  void insert(InputIterator f, InputIterator l) { rep.insert_equal(f,l); }

#else

  void insert(const value_type* f, const value_type* l) {

    rep.insert_equal(f,l);

  }

  void insert(const_iterator f, const_iterator l) { rep.insert_equal(f, l); }

#endif /*__STL_MEMBER_TEMPLATES */

  iterator insert_noresize(const value_type& obj)

    { return rep.insert_equal_noresize(obj); }

  iterator find(const key_type& key) { return rep.find(key); }

  const_iterator find(const key_type& key) const { return rep.find(key); }

  size_type count(const key_type& key) const { return rep.count(key); }

  pair<iterator, iterator> equal_range(const key_type& key)

    { return rep.equal_range(key); }

  pair<const_iterator, const_iterator> equal_range(const key_type& key) const

    { return rep.equal_range(key); }

  size_type erase(const key_type& key) {return rep.erase(key); }

  void erase(iterator it) { rep.erase(it); }

  void erase(iterator f, iterator l) { rep.erase(f, l); }

  void clear() { rep.clear(); }

public:

  void resize(size_type hint) { rep.resize(hint); }

  size_type bucket_count() const { return rep.bucket_count(); }

  size_type max_bucket_count() const { return rep.max_bucket_count(); }

  size_type elems_in_bucket(size_type n) const

    { return rep.elems_in_bucket(n); }

};

template <class Key, class T, class HF, class EqKey, class Alloc>

inline bool operator==(const hash_multimap<Key, T, HF, EqKey, Alloc>& hm1,

                       const hash_multimap<Key, T, HF, EqKey, Alloc>& hm2)

{

  return hm1.rep == hm2.rep;

}

#ifdef __STL_FUNCTION_TMPL_PARTIAL_ORDER

template <class Key, class T, class HashFcn, class EqualKey, class Alloc>

inline void swap(hash_multimap<Key, T, HashFcn, EqualKey, Alloc>& hm1,

                 hash_multimap<Key, T, HashFcn, EqualKey, Alloc>& hm2)

{

  hm1.swap(hm2);

}

#endif /* __STL_FUNCTION_TMPL_PARTIAL_ORDER */

#if defined(__sgi) && !defined(__GNUC__) && (_MIPS_SIM != _MIPS_SIM_ABI32)

#pragma reset woff 1174

#endif

__STL_END_NAMESPACE

#endif /* __SGI_STL_INTERNAL_HASH_MAP_H */

// Local Variables:

// mode:C++

// End:

stl_hash_map.h的更多相关文章

  1. C++ STL源码剖析

    stl_config.h defalloc.h stl_alloc.h memory.cpp stl_construct.h stl_uninitialized.h stl_iterator.h ty ...

  2. STL 之 hash_map源代码剖析

    // Filename: stl_hash_map.h // hash_map和hash_multimap是对hashtable的简单包装, 非常easy理解 /* * Copyright (c) 1 ...

  3. APUE中fcntl.h的使用及O_SYNC在Mac与Ubuntu下的测试

    此部分测试涉及到APUE V3中,第三章的图3-12到图3-14. 通过fcntl.h提供的功能,修改fd的文件属性,本处增加O_SYNC功能,并测试其效果. 本文涉及代码: tree ch3 ch3 ...

  4. 关于apue.3e中apue.h的使用

    关于apue.3e中apue.h的使用 近来要学一遍APUE第三版,并于此开博做为记录. 先下载源文件: # url: http://http//www.apuebook.com/code3e.htm ...

  5. YYModel 源码解读（二）之NSObject+YYModel.h (1)

    本篇文章主要介绍 _YYModelPropertyMeta 前边的内容 首先先解释一下前边的辅助函数和枚举变量,在写一个功能的时候,这些辅助的东西可能不是一开始就能想出来的,应该是在后续的编码过程中 ...

  6. YYModel 源码解读（一）之YYModel.h

    #if __has_include(<YYModel/YYModel.h>) FOUNDATION_EXPORT double YYModelVersionNumber; FOUNDATI ...

  7. error RC1015: cannot open include file 'afxres.h' 解决办法

    在为WindowsPhone8程序添加本地化的过程中遇到这个问题: 问题原因就是afxres.h文件缺失,下载它,放到VS安装目录下的VS\include目录下就可以了(选择目录的时候注意对应对版本) ...

  8. afxcomctl32.h与afxcomctl32.inl报错

    afxcomctl32.h与afxcomctl32.inl报错 编译公司一个几年前的老项目,是从VC6.0升级到VS2005的. 1.编译时报缺少头文件,于是附件包含目录,于是出现了以下报错: 1&g ...

  9. C标准头文件<math.h>

    定义域错误可以理解为超出了函数的适用范围,如果发生了定义域错误,设errno为EDOM 如果结果不能表示为double值,则发生值域错误,如果结果上溢,则函数返回HUGE_VAL的值,设errno为E ...

随机推荐

  1. 1.2 使用电脑测试MC20模块的GPS功能测试

    需要准备的硬件 MC20开发板 1个 https://item.taobao.com/item.htm?id=562661881042 GSM/GPRS天线 1根 https://item.taoba ...

  2. mysql数据库补充知识1 安装数据库破解数据库密码已经创建用户

    一.安装MYSQL数据库 1.yum安装 #二进制rpm包安装 yum -y install mysql-server mysql 2.源码安装   1.解压tar包 cd /software tar ...

  3. MySQL basics

    @1: MySQL有三大类数据类型, 分别为数字.日期\时间.字符串, 这三大类中又更细致的划分了许多子类型: 数字类型 整数: tinyint.smallint.mediumint.int.bigi ...

  4. Binary Search in Java

    关于折半查找中的几个注意点. Version 1: public static <T extends Comparable<? super T>> int binSearch( ...

  5. 流量分析系统---echarts模拟迁移中 ，geocoord从后台获取动态数值

    由于在echarts的使用手册中说了 {Object} geoCoord (geoCoord是Object类型) ,所以不能用传统的字符串拼接或数组的方式赋值.在后台的controller中用Map& ...

  6. 【转】Linux rpm 安装卸载操作

    rpm 是红帽(RedHat)软件包管理工具,实现类似于 Windows 中的添加/删除程序功能.下面,就来向大家介绍 rpm 命令的用法. 1. 安装rpm包: rpm -ivh 软件包名 安装软件 ...

  7. api token

    具体实现如下: 1. api请求客户端想服务器端一次发送用用户认证信息(用户名和密码),服务器端请求到改请求后,验证用户信息是否正确. 如果正确:则返回一个唯一不重复的字符串(一般为UUID),然后在 ...

  8. INSPIRED启示录 读书笔记 - 第15章 特约用户

    产品开发伙伴 为了解决两个问题——既深入洞察目标用户的需求,又赢得用户对产品的推荐,建议征集特约用户协助完成产品研发 在项目的开始阶段物色至少六位积极.活跃.乐于分享的目标户,要求是他们在产品的目标用 ...

  9. FIND_IN_SET的简单使用

    FIND_IN_SET(str,strlist)函数 str 要查询的字符串 strlist 字段名 参数以”,”分隔 如 (1,2,6,8) 查询字段(strlist)中包含(str)的结果,返回结 ...

  10. SpringMVC中响应json数据（异步传送）

    1.首先导入3个jar包: jackson-annotations-2.1.5.jar jackson-core-2.1.5.jar jackson-databind-2.1.5.jar JSON所需 ...