#include <stddef.h>
#include <string.h>
#include "MemoryUtils.h"
#include "Object.h"
#include "XRef.h"
#include "Dict.h"

namespace PdfReader
{
	//------------------------------------------------------------------------
	// Dict
	//------------------------------------------------------------------------

	Dict::Dict(XRef *pXref)
	{
		m_pXref = pXref;
		m_arrEntries = NULL;
		m_nEntriesSize = m_nEntriesCount = 0;
		m_nRef = 1;
	}

	Dict::~Dict()
	{
		for (int nIndex = 0; nIndex < m_nEntriesCount; ++nIndex)
		{
			MemUtilsFree(m_arrEntries[nIndex].sKey);
			m_arrEntries[nIndex].oValue.Free();
		}
		MemUtilsFree(m_arrEntries);
	}

	void Dict::AddItem(char *sKey, Object *pValue)
	{
		if (m_nEntriesCount == m_nEntriesSize)
		{
			if (0 == m_nEntriesCount)
			{
				m_nEntriesSize = 8;
			}
			else
			{
				m_nEntriesSize *= 2;
			}
			m_arrEntries = (DictEntry *)MemUtilsReallocArray(m_arrEntries, m_nEntriesSize, sizeof(DictEntry));
		}
		m_arrEntries[m_nEntriesCount].sKey = sKey;
		m_arrEntries[m_nEntriesCount].oValue = *pValue;
		++m_nEntriesCount;
	}

	inline DictEntry *Dict::Find(char *sKey)
	{
		for (int nIndex = 0; nIndex < m_nEntriesCount; ++nIndex)
		{
			if (!strcmp(sKey, m_arrEntries[nIndex].sKey))
				return &m_arrEntries[nIndex];
		}
		return NULL;
	}

	bool Dict::CheckType(char *sType)
	{
		DictEntry *pEntry = NULL;

		return (pEntry = Find("Type")) && pEntry->oValue.IsName(sType);
	}

	Object *Dict::Search(char *sKey, Object *pObj)
	{
		DictEntry *pEntry = NULL;

		return (pEntry = Find(sKey)) ? pEntry->oValue.Fetch(m_pXref, pObj) : pObj->InitNull();
	}

	Object *Dict::SearchAndCopy(char *sKey, Object *pObj)
	{
		DictEntry *pEntry = NULL;

		return (pEntry = Find(sKey)) ? pEntry->oValue.Copy(pObj) : pObj->InitNull();
	}

	char *Dict::GetKey(int nIndex)
	{
		return m_arrEntries[nIndex].sKey;
	}

	Object *Dict::GetValue(int nIndex, Object *pObj)
	{
		return m_arrEntries[nIndex].oValue.Fetch(m_pXref, pObj);
	}

	Object *Dict::GetValueCopy(int nIndex, Object *pObj)
	{
		return m_arrEntries[nIndex].oValue.Copy(pObj);
	}
}