axmol/cocos2dx/cocoa/CCDictionary.h

/****************************************************************************
Copyright (c) 2010 cocos2d-x.org

http://www.cocos2d-x.org

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****************************************************************************/

#ifndef __CCDICTIONARY_H__
#define __CCDICTIONARY_H__

#include "support/data_support/uthash.h"
#include "CCObject.h"
#include "CCArray.h"
#include "CCString.h"

NS_CC_BEGIN

class CCDictionary;

/**
 * @addtogroup data_structures
 * @{
 */

class CC_DLL CCDictElement
{
    #define MAX_KEY_LEN  256
public:
    CCDictElement(const char* pszKey, CCObject* pObject)
    {
        init();
        m_pObject = pObject;

        const char* pStart = pszKey;
        
        int len = strlen(pszKey);
        if (len > MAX_KEY_LEN )
        {
            char* pEnd = (char*)&pszKey[len-1];
            pStart = pEnd - (MAX_KEY_LEN-1);
        }

        strcpy(m_szKey, pStart);
    }

    CCDictElement(intptr_t iKey, CCObject* pObject)
    {
        init();
        m_iKey = iKey;
        m_pObject = pObject;
    }

    inline const char* getStrKey() const
    {
        CCAssert(m_szKey[0] != '\0', "Should not call this function for integer dictionary");
        return m_szKey;
    }

    inline intptr_t getIntKey() const 
    {
        CCAssert(m_szKey[0] == '\0', "Should not call this function for string dictionary");
        return m_iKey;
    }

    inline CCObject* getObject() const
    {
        return m_pObject;
    }

private:
    inline void init()
    {
        m_iKey = 0;
        m_pObject = NULL;
        memset(m_szKey, 0, sizeof(m_szKey));
        memset(&hh, 0, sizeof(hh));
    }

private:
    char m_szKey[MAX_KEY_LEN+1];  /** hash key of string type*/
    intptr_t  m_iKey;   /** hash key of integer type */
    CCObject* m_pObject;/** hash value */
public:
    UT_hash_handle hh; /* makes this class hashable */
    friend class CCDictionary;
};


#define CCDICT_FOREACH(__dict__, __el__) \
    CCDictElement* pTmp##__dict__##__el__ = NULL; \
    HASH_ITER(hh, (__dict__)->m_pElements, __el__, pTmp##__dict__##__el__)


class CC_DLL CCDictionary : public CCObject
{
public:
    CCDictionary();
    ~CCDictionary();

    /// return the number of items
    unsigned int count();

    /// return all the keys
    CCArray* allKeys();

    /** @warning : We use '==' to compare two objects*/
    CCArray* allKeysForObject(CCObject* object);

    CCObject* objectForKey(const std::string& key);
    CCObject* objectForKey(int key);
    const CCString* valueForKey(const std::string& key);
    const CCString* valueForKey(int key);


    void setObject(CCObject* pObject, const std::string& key);
    void setObject(CCObject* pObject, int key);

    void removeObjectForKey(const std::string& key);
    void removeObjectForKey(int key);
    void removeObjectsForKeys(CCArray* pKeyArray);
    void removeObjectForElememt(CCDictElement* pElement);
    void removeAllObjects();

    virtual CCObject* copyWithZone(CCZone* pZone);

    /** Returns a random element */
    CCObject* randomObject();
    
    static CCDictionary* create();

    static CCDictionary* createWithDictionary(CCDictionary* srcDict);
    /**
    @brief   Generate a CCDictionary pointer by file
    @param   pFileName  The file name of *.plist file
    @return  The CCDictionary pointer generated from the file
    */
    static CCDictionary* createWithContentsOfFile(const char *pFileName);

    /*
    @brief The same meaning as dictionaryWithContentsOfFile(), but it doesn't call autorelease, so the
           invoker should call release().
    */
    static CCDictionary* createWithContentsOfFileThreadSafe(const char *pFileName);

private:
    void setObjectUnSafe(CCObject* pObject, const std::string& key);
    void setObjectUnSafe(CCObject* pObject, const int key);
    
public:
    CCDictElement* m_pElements;
private:
    
    enum CCDictType
    {
        kCCDictUnknown = 0,
        kCCDictStr,
        kCCDictInt
    };
    CCDictType m_eDictType;
    CCDictType m_eOldDictType;
};

// end of data_structure group
/// @}

NS_CC_END

#endif /* __CCDICTIONARY_H__ */