axmol/cocos2dx/platform/CCFileUtils.cpp

/****************************************************************************
Copyright (c) 2010-2013 cocos2d-x.org

http://www.cocos2d-x.org

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
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THE SOFTWARE.
****************************************************************************/

#include "CCFileUtils.h"
#include "CCDirector.h"
#include "cocoa/CCDictionary.h"
#include "cocoa/CCString.h"
#include "CCSAXParser.h"
#include "support/zip_support/unzip.h"
#include <stack>

using namespace std;

#if (CC_TARGET_PLATFORM != CC_PLATFORM_IOS) && (CC_TARGET_PLATFORM != CC_PLATFORM_MAC)

NS_CC_BEGIN

typedef enum 
{
    SAX_NONE = 0,
    SAX_KEY,
    SAX_DICT,
    SAX_INT,
    SAX_REAL,
    SAX_STRING,
    SAX_ARRAY
}CCSAXState;

typedef enum
{
    SAX_RESULT_NONE = 0,
    SAX_RESULT_DICT,
    SAX_RESULT_ARRAY
}CCSAXResult;

class CCDictMaker : public CCSAXDelegator
{
public:
    CCSAXResult m_eResultType;
    CCArray* m_pRootArray;
    CCDictionary *m_pRootDict;
    CCDictionary *m_pCurDict;
    std::stack<CCDictionary*> m_tDictStack;
    std::string m_sCurKey;   ///< parsed key
    std::string m_sCurValue; // parsed value
    CCSAXState m_tState;
    CCArray* m_pArray;

    std::stack<CCArray*> m_tArrayStack;
    std::stack<CCSAXState>  m_tStateStack;

public:
    CCDictMaker()        
        : m_eResultType(SAX_RESULT_NONE),
          m_pRootArray(NULL), 
          m_pRootDict(NULL),
          m_pCurDict(NULL),
          m_tState(SAX_NONE),
          m_pArray(NULL)
    {
    }

    ~CCDictMaker()
    {
    }

    CCDictionary* dictionaryWithContentsOfFile(const char *pFileName)
    {
        m_eResultType = SAX_RESULT_DICT;
        CCSAXParser parser;

        if (false == parser.init("UTF-8"))
        {
            return NULL;
        }
        parser.setDelegator(this);

        parser.parse(pFileName);
        return m_pRootDict;
    }

    CCArray* arrayWithContentsOfFile(const char* pFileName)
    {
        m_eResultType = SAX_RESULT_ARRAY;
        CCSAXParser parser;

        if (false == parser.init("UTF-8"))
        {
            return NULL;
        }
        parser.setDelegator(this);

        parser.parse(pFileName);
        return m_pArray;
    }

    void startElement(void *ctx, const char *name, const char **atts)
    {
        CC_UNUSED_PARAM(ctx);
        CC_UNUSED_PARAM(atts);
        std::string sName((char*)name);
        if( sName == "dict" )
        {
            m_pCurDict = new CCDictionary();
            if(m_eResultType == SAX_RESULT_DICT && m_pRootDict == NULL)
            {
                // Because it will call m_pCurDict->release() later, so retain here.
                m_pRootDict = m_pCurDict;
                m_pRootDict->retain();
            }
            m_tState = SAX_DICT;

            CCSAXState preState = SAX_NONE;
            if (! m_tStateStack.empty())
            {
                preState = m_tStateStack.top();
            }

            if (SAX_ARRAY == preState)
            {
                // add the dictionary into the array
                m_pArray->addObject(m_pCurDict);
            }
            else if (SAX_DICT == preState)
            {
                // add the dictionary into the pre dictionary
                CCAssert(! m_tDictStack.empty(), "The state is wrong!");
                CCDictionary* pPreDict = m_tDictStack.top();
                pPreDict->setObject(m_pCurDict, m_sCurKey.c_str());
            }

            m_pCurDict->release();

            // record the dict state
            m_tStateStack.push(m_tState);
            m_tDictStack.push(m_pCurDict);
        }
        else if(sName == "key")
        {
            m_tState = SAX_KEY;
        }
        else if(sName == "integer")
        {
            m_tState = SAX_INT;
        }
        else if(sName == "real")
        {
            m_tState = SAX_REAL;
        }
        else if(sName == "string")
        {
            m_tState = SAX_STRING;
        }
        else if (sName == "array")
        {
            m_tState = SAX_ARRAY;
            m_pArray = new CCArray();
            if (m_eResultType == SAX_RESULT_ARRAY && m_pRootArray == NULL)
            {
                m_pRootArray = m_pArray;
                m_pRootArray->retain();
            }
            CCSAXState preState = SAX_NONE;
            if (! m_tStateStack.empty())
            {
                preState = m_tStateStack.top();
            }

            if (preState == SAX_DICT)
            {
                m_pCurDict->setObject(m_pArray, m_sCurKey.c_str());
            }
            else if (preState == SAX_ARRAY)
            {
                CCAssert(! m_tArrayStack.empty(), "The state is wrong!");
                CCArray* pPreArray = m_tArrayStack.top();
                pPreArray->addObject(m_pArray);
            }
            m_pArray->release();
            // record the array state
            m_tStateStack.push(m_tState);
            m_tArrayStack.push(m_pArray);
        }
        else
        {
            m_tState = SAX_NONE;
        }
    }

    void endElement(void *ctx, const char *name)
    {
        CC_UNUSED_PARAM(ctx);
        CCSAXState curState = m_tStateStack.empty() ? SAX_DICT : m_tStateStack.top();
        std::string sName((char*)name);
        if( sName == "dict" )
        {
            m_tStateStack.pop();
            m_tDictStack.pop();
            if ( !m_tDictStack.empty())
            {
                m_pCurDict = m_tDictStack.top();
            }
        }
        else if (sName == "array")
        {
            m_tStateStack.pop();
            m_tArrayStack.pop();
            if (! m_tArrayStack.empty())
            {
                m_pArray = m_tArrayStack.top();
            }
        }
        else if (sName == "true")
        {
            CCString *str = new CCString("1");
            if (SAX_ARRAY == curState)
            {
                m_pArray->addObject(str);
            }
            else if (SAX_DICT == curState)
            {
                m_pCurDict->setObject(str, m_sCurKey.c_str());
            }
            str->release();
        }
        else if (sName == "false")
        {
            CCString *str = new CCString("0");
            if (SAX_ARRAY == curState)
            {
                m_pArray->addObject(str);
            }
            else if (SAX_DICT == curState)
            {
                m_pCurDict->setObject(str, m_sCurKey.c_str());
            }
            str->release();
        }
        else if (sName == "string" || sName == "integer" || sName == "real")
        {
            CCString* pStrValue = new CCString(m_sCurValue);

            if (SAX_ARRAY == curState)
            {
                m_pArray->addObject(pStrValue);
            }
            else if (SAX_DICT == curState)
            {
                m_pCurDict->setObject(pStrValue, m_sCurKey.c_str());
            }

            pStrValue->release();
            m_sCurValue.clear();
        }
        
        m_tState = SAX_NONE;
    }

    void textHandler(void *ctx, const char *ch, int len)
    {
        CC_UNUSED_PARAM(ctx);
        if (m_tState == SAX_NONE)
        {
            return;
        }

        CCSAXState curState = m_tStateStack.empty() ? SAX_DICT : m_tStateStack.top();
        CCString *pText = new CCString(std::string((char*)ch,0,len));

        switch(m_tState)
        {
        case SAX_KEY:
            m_sCurKey = pText->getCString();
            break;
        case SAX_INT:
        case SAX_REAL:
        case SAX_STRING:
            {
                if (curState == SAX_DICT)
                {
                    CCAssert(!m_sCurKey.empty(), "key not found : <integer/real>");
                }
                
                m_sCurValue.append(pText->getCString());
            }
            break;
        default:
            break;
        }
        pText->release();
    }
};

CCDictionary* CCFileUtils::createCCDictionaryWithContentsOfFile(const std::string& filename)
{
    CCDictMaker tMaker;
    return tMaker.dictionaryWithContentsOfFile(filename.c_str());
}

CCArray* CCFileUtils::createCCArrayWithContentsOfFile(const std::string& filename)
{
    CCDictMaker tMaker;
    return tMaker.arrayWithContentsOfFile(filename.c_str());
}

#else
NS_CC_BEGIN

/* The subclass CCFileUtilsIOS and CCFileUtilsMac should override these two method. */
CCDictionary* CCFileUtils::createCCDictionaryWithContentsOfFile(const std::string& filename) {return NULL;}
CCArray* CCFileUtils::createCCArrayWithContentsOfFile(const std::string& filename) {return NULL;}

#endif /* (CC_TARGET_PLATFORM != CC_PLATFORM_IOS) && (CC_TARGET_PLATFORM != CC_PLATFORM_MAC) */


CCFileUtils* CCFileUtils::s_sharedFileUtils = NULL;

void CCFileUtils::purgeFileUtils()
{
    CC_SAFE_DELETE(s_sharedFileUtils);
}

CCFileUtils::CCFileUtils()
: m_pFilenameLookupDict(NULL)
{
}

CCFileUtils::~CCFileUtils()
{
    CC_SAFE_RELEASE(m_pFilenameLookupDict);
}

bool CCFileUtils::init()
{
    m_searchPathArray.push_back(m_strDefaultResRootPath);
    m_searchResolutionsOrderArray.push_back("");
    return true;
}

void CCFileUtils::purgeCachedEntries()
{
    m_fullPathCache.clear();
}

unsigned char* CCFileUtils::getFileData(const char* pszFileName, const char* pszMode, unsigned long * pSize)
{
    unsigned char * pBuffer = NULL;
    CCAssert(pszFileName != NULL && pSize != NULL && pszMode != NULL, "Invalid parameters.");
    *pSize = 0;
    do
    {
        // read the file from hardware
        std::string fullPath = fullPathForFilename(pszFileName);
        FILE *fp = fopen(fullPath.c_str(), pszMode);
        CC_BREAK_IF(!fp);
        
        fseek(fp,0,SEEK_END);
        *pSize = ftell(fp);
        fseek(fp,0,SEEK_SET);
        pBuffer = new unsigned char[*pSize];
        *pSize = fread(pBuffer,sizeof(unsigned char), *pSize,fp);
        fclose(fp);
    } while (0);
    
    if (! pBuffer)
    {
        std::string msg = "Get data from file(";
        msg.append(pszFileName).append(") failed!");
        
        CCLOG(msg.c_str());
    }
    return pBuffer;
}

unsigned char* CCFileUtils::getFileDataFromZip(const char* pszZipFilePath, const char* pszFileName, unsigned long * pSize)
{
    unsigned char * pBuffer = NULL;
    unzFile pFile = NULL;
    *pSize = 0;

    do 
    {
        CC_BREAK_IF(!pszZipFilePath || !pszFileName);
        CC_BREAK_IF(strlen(pszZipFilePath) == 0);

        pFile = unzOpen(pszZipFilePath);
        CC_BREAK_IF(!pFile);

        int nRet = unzLocateFile(pFile, pszFileName, 1);
        CC_BREAK_IF(UNZ_OK != nRet);

        char szFilePathA[260];
        unz_file_info FileInfo;
        nRet = unzGetCurrentFileInfo(pFile, &FileInfo, szFilePathA, sizeof(szFilePathA), NULL, 0, NULL, 0);
        CC_BREAK_IF(UNZ_OK != nRet);

        nRet = unzOpenCurrentFile(pFile);
        CC_BREAK_IF(UNZ_OK != nRet);

        pBuffer = new unsigned char[FileInfo.uncompressed_size];
        int nSize = 0;
        nSize = unzReadCurrentFile(pFile, pBuffer, FileInfo.uncompressed_size);
        CCAssert(nSize == 0 || nSize == (int)FileInfo.uncompressed_size, "the file size is wrong");

        *pSize = FileInfo.uncompressed_size;
        unzCloseCurrentFile(pFile);
    } while (0);

    if (pFile)
    {
        unzClose(pFile);
    }

    return pBuffer;
}

std::string CCFileUtils::getNewFilename(const char* pszFileName)
{
    const char* pszNewFileName = NULL;
    // in Lookup Filename dictionary ?
    CCString* fileNameFound = m_pFilenameLookupDict ? (CCString*)m_pFilenameLookupDict->objectForKey(pszFileName) : NULL;
    if( NULL == fileNameFound || fileNameFound->length() == 0) {
        pszNewFileName = pszFileName;
    }
    else {
        pszNewFileName = fileNameFound->getCString();
        //CCLOG("FOUND NEW FILE NAME: %s.", pszNewFileName);
    }
    return pszNewFileName;
}

std::string CCFileUtils::getPathForFilename(const std::string& filename, const std::string& resolutionDirectory, const std::string& searchPath)
{
    std::string file = filename;
    std::string file_path = "";
    size_t pos = filename.find_last_of("/");
    if (pos != std::string::npos)
    {
        file_path = filename.substr(0, pos+1);
        file = filename.substr(pos+1);
    }
    
    // searchPath + file_path + resourceDirectory
    std::string path = searchPath;
    path += file_path;
    path += resolutionDirectory;
    
    path = getFullPathForDirectoryAndFilename(path, file);
    
    //CCLOG("getPathForFilename, fullPath = %s", path.c_str());
    return path;
}


std::string CCFileUtils::fullPathForFilename(const char* pszFileName)
{
    CCAssert(pszFileName != NULL, "CCFileUtils: Invalid path");
    
    std::string strFileName = pszFileName;
    if (isAbsolutePath(pszFileName))
    {
        //CCLOG("Return absolute path( %s ) directly.", pszFileName);
        return pszFileName;
    }
    
    // Already Cached ?
    std::map<std::string, std::string>::iterator cacheIter = m_fullPathCache.find(pszFileName);
    if (cacheIter != m_fullPathCache.end())
    {
        //CCLOG("Return full path from cache: %s", cacheIter->second.c_str());
        return cacheIter->second;
    }
    
    // Get the new file name.
    std::string newFilename = getNewFilename(pszFileName);
    
    string fullpath = "";
    
    for (std::vector<std::string>::iterator searchPathsIter = m_searchPathArray.begin();
         searchPathsIter != m_searchPathArray.end(); ++searchPathsIter) {
        for (std::vector<std::string>::iterator resOrderIter = m_searchResolutionsOrderArray.begin();
             resOrderIter != m_searchResolutionsOrderArray.end(); ++resOrderIter) {
            
            //CCLOG("\n\nSEARCHING: %s, %s, %s", newFilename.c_str(), resOrderIter->c_str(), searchPathsIter->c_str());
            
            fullpath = this->getPathForFilename(newFilename, *resOrderIter, *searchPathsIter);
            
            if (fullpath.length() > 0)
            {
                // Using the filename passed in as key.
                m_fullPathCache.insert(std::pair<std::string, std::string>(pszFileName, fullpath));
                //CCLOG("Returning path: %s", fullpath.c_str());
                return fullpath;
            }
        }
    }
    
    // The file wasn't found, return the file name passed in.
    return pszFileName;
}

const char* CCFileUtils::fullPathFromRelativeFile(const char *pszFilename, const char *pszRelativeFile)
{
    std::string relativeFile = pszRelativeFile;
    CCString *pRet = CCString::create("");
    pRet->m_sString = relativeFile.substr(0, relativeFile.rfind('/')+1);
    pRet->m_sString += getNewFilename(pszFilename);
    return pRet->getCString();
}

void CCFileUtils::setSearchResolutionsOrder(const std::vector<std::string>& searchResolutionsOrder)
{
    bool bExistDefault = false;
    m_searchResolutionsOrderArray.clear();
    for (std::vector<std::string>::const_iterator iter = searchResolutionsOrder.begin(); iter != searchResolutionsOrder.end(); ++iter)
    {
        std::string resolutionDirectory = *iter;
        if (!bExistDefault && resolutionDirectory == "")
        {
            bExistDefault = true;
        }
        
        if (resolutionDirectory.length() > 0 && resolutionDirectory[resolutionDirectory.length()-1] != '/')
        {
            resolutionDirectory += "/";
        }
        
        m_searchResolutionsOrderArray.push_back(resolutionDirectory);
    }
    if (!bExistDefault)
    {
        m_searchResolutionsOrderArray.push_back("");
    }
}

void CCFileUtils::addSearchResolutionsOrder(const char* order)
{
    m_searchResolutionsOrderArray.push_back(order);
}

const std::vector<std::string>& CCFileUtils::getSearchResolutionsOrder()
{
    return m_searchResolutionsOrderArray;
}

const std::vector<std::string>& CCFileUtils::getSearchPaths()
{
    return m_searchPathArray;
}

void CCFileUtils::setSearchPaths(const std::vector<std::string>& searchPaths)
{
    bool bExistDefaultRootPath = false;
    
    m_searchPathArray.clear();
    for (std::vector<std::string>::const_iterator iter = searchPaths.begin(); iter != searchPaths.end(); ++iter)
    {
        std::string strPrefix;
        std::string path;
        if (!isAbsolutePath(*iter))
        { // Not an absolute path
            strPrefix = m_strDefaultResRootPath;
        }
        path = strPrefix+(*iter);
        if (path.length() > 0 && path[path.length()-1] != '/')
        {
            path += "/";
        }
        if (!bExistDefaultRootPath && path == m_strDefaultResRootPath)
        {
            bExistDefaultRootPath = true;
        }
        m_searchPathArray.push_back(path);
    }
    
    if (!bExistDefaultRootPath)
    {
        //CCLOG("Default root path doesn't exist, adding it.");
        m_searchPathArray.push_back(m_strDefaultResRootPath);
    }
}

void CCFileUtils::addSearchPath(const char* path_)
{
    std::string strPrefix;
    std::string path(path_);
    if (!isAbsolutePath(path))
    { // Not an absolute path
        strPrefix = m_strDefaultResRootPath;
    }
    path = strPrefix + path;
    if (path.length() > 0 && path[path.length()-1] != '/')
    {
        path += "/";
    }
    m_searchPathArray.push_back(path);
}

void CCFileUtils::setFilenameLookupDictionary(CCDictionary* pFilenameLookupDict)
{
    CC_SAFE_RELEASE(m_pFilenameLookupDict);
    m_pFilenameLookupDict = pFilenameLookupDict;
    CC_SAFE_RETAIN(m_pFilenameLookupDict);
}

void CCFileUtils::loadFilenameLookupDictionaryFromFile(const char* filename)
{
    std::string fullPath = this->fullPathForFilename(filename);
    if (fullPath.length() > 0)
    {
        CCDictionary* pDict = CCDictionary::createWithContentsOfFile(fullPath.c_str());
        if (pDict)
        {
            CCDictionary* pMetadata = (CCDictionary*)pDict->objectForKey("metadata");
            int version = ((CCString*)pMetadata->objectForKey("version"))->intValue();
            if (version != 1)
            {
                CCLOG("cocos2d: ERROR: Invalid filenameLookup dictionary version: %ld. Filename: %s", (long)version, filename);
                return;
            }
            setFilenameLookupDictionary((CCDictionary*)pDict->objectForKey("filenames"));
        }
    }
}

std::string CCFileUtils::getFullPathForDirectoryAndFilename(const std::string& strDirectory, const std::string& strFilename)
{
    std::string ret = strDirectory+strFilename;
    if (!isFileExist(ret)) {
        ret = "";
    }
    return ret;
}

bool CCFileUtils::isAbsolutePath(const std::string& strPath)
{
    return strPath[0] == '/' ? true : false;
}

//////////////////////////////////////////////////////////////////////////
// Notification support when getFileData from invalid file path.
//////////////////////////////////////////////////////////////////////////
static bool s_bPopupNotify = true;

void CCFileUtils::setPopupNotify(bool bNotify)
{
    s_bPopupNotify = bNotify;
}

bool CCFileUtils::isPopupNotify()
{
    return s_bPopupNotify;
}

NS_CC_END