axmol/cocos2dx/platform/android/CCFileUtilsAndroid.cpp

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

http://www.cocos2d-x.org

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****************************************************************************/
#include "CCFileUtilsAndroid.h"
#include "platform/CCCommon.h"
#include "jni/Java_org_cocos2dx_lib_Cocos2dxHelper.h"
#include "android/asset_manager.h"
#include "android/asset_manager_jni.h"

#include <stdlib.h>

#define  LOG_TAG    "CCFileUtilsAndroid.cpp"
#define  LOGD(...)  __android_log_print(ANDROID_LOG_DEBUG,LOG_TAG,__VA_ARGS__)

using namespace std;

AAssetManager* cocos2d::FileUtilsAndroid::assetmanager = NULL;

NS_CC_BEGIN

void FileUtilsAndroid::setassetmanager(AAssetManager* a) {
    if (NULL == a) {
        LOGD("setassetmanager : received unexpected NULL parameter");
        return;
    }

    cocos2d::FileUtilsAndroid::assetmanager = a;
}

FileUtils* FileUtils::getInstance()
{
    if (s_sharedFileUtils == NULL)
    {
        s_sharedFileUtils = new FileUtilsAndroid();
        if(!s_sharedFileUtils->init())
        {
          delete s_sharedFileUtils;
          s_sharedFileUtils = NULL;
          CCLOG("ERROR: Could not init CCFileUtilsAndroid");
        }
    }
    return s_sharedFileUtils;
}

FileUtilsAndroid::FileUtilsAndroid()
{
}

FileUtilsAndroid::~FileUtilsAndroid()
{
}

bool FileUtilsAndroid::init()
{
    _defaultResRootPath = "assets/";
    return FileUtils::init();
}

bool FileUtilsAndroid::isFileExist(const std::string& strFilePath)
{
    if (0 == strFilePath.length())
    {
        return false;
    }

    bool bFound = false;
    
    // Check whether file exists in apk.
    if (strFilePath[0] != '/')
    {
        const char* s = strFilePath.c_str();

        // Found "assets/" at the beginning of the path and we don't want it
        if (strFilePath.find(_defaultResRootPath) == 0) s += strlen("assets/");

        if (FileUtilsAndroid::assetmanager) {
            AAsset* aa = AAssetManager_open(FileUtilsAndroid::assetmanager, s, AASSET_MODE_UNKNOWN);
            if (aa)
            {
                bFound = true;
                AAsset_close(aa);
            } else {
                // CCLOG("[AssetManager] ... in APK %s, found = false!", strFilePath.c_str());
            }
        }
    }
    else
    {
        FILE *fp = fopen(strFilePath.c_str(), "r");
        if(fp)
        {
            bFound = true;
            fclose(fp);
        }
    }
    return bFound;
}

bool FileUtilsAndroid::isAbsolutePath(const std::string& strPath)
{
    // On Android, there are two situations for full path.
    // 1) Files in APK, e.g. assets/path/path/file.png
    // 2) Files not in APK, e.g. /data/data/org.cocos2dx.hellocpp/cache/path/path/file.png, or /sdcard/path/path/file.png.
    // So these two situations need to be checked on Android.
    if (strPath[0] == '/' || strPath.find(_defaultResRootPath) == 0)
    {
        return true;
    }
    return false;
}


unsigned char* FileUtilsAndroid::getFileData(const char* filename, const char* pszMode, unsigned long * pSize)
{    
    return doGetFileData(filename, pszMode, pSize, false);
}

unsigned char* FileUtilsAndroid::getFileDataForAsync(const char* filename, const char* pszMode, unsigned long * pSize)
{
    return doGetFileData(filename, pszMode, pSize, true);
}

unsigned char* FileUtilsAndroid::doGetFileData(const char* filename, const char* pszMode, unsigned long * pSize, bool forAsync)
{
    unsigned char * pData = 0;
    
    if ((! filename) || (! pszMode) || 0 == strlen(filename))
    {
        return 0;
    }
    
    string fullPath = fullPathForFilename(filename);
    
    if (fullPath[0] != '/')
    {
        
        string fullPath(filename);
        // fullPathForFilename is not thread safe.
        if (! forAsync)
        {
            fullPath = fullPathForFilename(filename);
        }

        const char* relativepath = fullPath.c_str();

        // "assets/" is at the beginning of the path and we don't want it
        relativepath += strlen("assets/");

        if (NULL == FileUtilsAndroid::assetmanager) {
            LOGD("... FileUtilsAndroid::assetmanager is NULL");
            return NULL;
        }

        // read asset data
        AAsset* asset =
            AAssetManager_open(FileUtilsAndroid::assetmanager,
                               relativepath,
                               AASSET_MODE_UNKNOWN);
        if (NULL == asset) {
            LOGD("asset : is NULL");
            return NULL;
        }

        off_t size = AAsset_getLength(asset);

        pData = new unsigned char[size];

        int bytesread = AAsset_read(asset, (void*)pData, size);
        if (pSize)
        {
            *pSize = bytesread;
        }

        AAsset_close(asset);
    }
    else
    {
        do
        {
            // read rrom other path than user set it
	        //CCLOG("GETTING FILE ABSOLUTE DATA: %s", filename);
            FILE *fp = fopen(fullPath.c_str(), pszMode);
            CC_BREAK_IF(!fp);
            
            unsigned long size;
            fseek(fp,0,SEEK_END);
            size = ftell(fp);
            fseek(fp,0,SEEK_SET);
            pData = new unsigned char[size];
            size = fread(pData,sizeof(unsigned char), size,fp);
            fclose(fp);
            
            if (pSize)
            {
                *pSize = size;
            }
        } while (0);
    }
    
    if (! pData)
    {
        std::string msg = "Get data from file(";
        msg.append(filename).append(") failed!");
        CCLOG("%s", msg.c_str());
    }
    
    return pData;
}

string FileUtilsAndroid::getWritablePath()
{
    // Fix for Nexus 10 (Android 4.2 multi-user environment)
    // the path is retrieved through Java Context.getCacheDir() method
    string dir("");
    string tmp = getFileDirectoryJNI();

    if (tmp.length() > 0)
    {
        dir.append(tmp).append("/");

        return dir;
    }
    else
    {
        return "";
    }
}

NS_CC_END