axmol/cocos/platform/win32/CCFileUtils-win32.cpp

/****************************************************************************
Copyright (c) 2010-2012 cocos2d-x.org
Copyright (c) 2013-2016 Chukong Technologies Inc.

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#include "platform/CCPlatformConfig.h"
#if CC_TARGET_PLATFORM == CC_PLATFORM_WIN32

#include "platform/win32/CCFileUtils-win32.h"
#include "platform/win32/CCUtils-win32.h"
#include "platform/CCCommon.h"
#include <Shlobj.h>
#include <cstdlib>
#include <regex>
#include <sstream>

using namespace std;

NS_CC_BEGIN

#define CC_MAX_PATH  512

// The root path of resources, the character encoding is UTF-8.
// UTF-8 is the only encoding supported by cocos2d-x API.
static std::string s_resourcePath = "";

// D:\aaa\bbb\ccc\ddd\abc.txt --> D:/aaa/bbb/ccc/ddd/abc.txt
static inline std::string convertPathFormatToUnixStyle(const std::string& path)
{
    std::string ret = path;
    int len = ret.length();
    for (int i = 0; i < len; ++i)
    {
        if (ret[i] == '\\')
        {
            ret[i] = '/';
        }
    }
    return ret;
}

static void _checkPath()
{
    if (s_resourcePath.empty())
    {
        WCHAR utf16Path[CC_MAX_PATH] = { 0 };
        GetModuleFileNameW(NULL, utf16Path, CC_MAX_PATH - 1);
        WCHAR *pUtf16ExePath = &(utf16Path[0]);

        // We need only directory part without exe
        WCHAR *pUtf16DirEnd = wcsrchr(pUtf16ExePath, L'\\');

        char utf8ExeDir[CC_MAX_PATH] = { 0 };
        int nNum = WideCharToMultiByte(CP_UTF8, 0, pUtf16ExePath, pUtf16DirEnd-pUtf16ExePath+1, utf8ExeDir, sizeof(utf8ExeDir), nullptr, nullptr);

        s_resourcePath = convertPathFormatToUnixStyle(utf8ExeDir);
    }
}

FileUtils* FileUtils::getInstance()
{
    if (s_sharedFileUtils == nullptr)
    {
        s_sharedFileUtils = new FileUtilsWin32();
        if(!s_sharedFileUtils->init())
        {
          delete s_sharedFileUtils;
          s_sharedFileUtils = nullptr;
          CCLOG("ERROR: Could not init CCFileUtilsWin32");
        }
    }
    return s_sharedFileUtils;
}

FileUtilsWin32::FileUtilsWin32()
{
}

bool FileUtilsWin32::init()
{
    _checkPath();
    _defaultResRootPath = s_resourcePath;
    return FileUtils::init();
}

bool FileUtilsWin32::isDirectoryExistInternal(const std::string& dirPath) const
{
    unsigned long fAttrib = GetFileAttributes(StringUtf8ToWideChar(dirPath).c_str());
    if (fAttrib != INVALID_FILE_ATTRIBUTES &&
        (fAttrib & FILE_ATTRIBUTE_DIRECTORY))
    {
        return true;
    }
    return false;
}

std::string FileUtilsWin32::getSuitableFOpen(const std::string& filenameUtf8) const
{
    return UTF8StringToMultiByte(filenameUtf8);
}

long FileUtilsWin32::getFileSize(const std::string &filepath)
{
    WIN32_FILE_ATTRIBUTE_DATA fad;
    if (!GetFileAttributesEx(StringUtf8ToWideChar(filepath).c_str(), GetFileExInfoStandard, &fad))
    {
        return 0; // error condition, could call GetLastError to find out more
    }
    LARGE_INTEGER size;
    size.HighPart = fad.nFileSizeHigh;
    size.LowPart = fad.nFileSizeLow;
    return (long)size.QuadPart;
}

bool FileUtilsWin32::isFileExistInternal(const std::string& strFilePath) const
{
    if (strFilePath.empty())
    {
        return false;
    }

    std::string strPath = strFilePath;
    if (!isAbsolutePath(strPath))
    { // Not absolute path, add the default root path at the beginning.
        strPath.insert(0, _defaultResRootPath);
    }

    DWORD attr = GetFileAttributesW(StringUtf8ToWideChar(strPath).c_str());
    if(attr == INVALID_FILE_ATTRIBUTES || (attr & FILE_ATTRIBUTE_DIRECTORY))
        return false;   //  not a file
    return true;
}

bool FileUtilsWin32::isAbsolutePath(const std::string& strPath) const
{
    if (   (strPath.length() > 2
        && ( (strPath[0] >= 'a' && strPath[0] <= 'z') || (strPath[0] >= 'A' && strPath[0] <= 'Z') )
        && strPath[1] == ':') || (strPath[0] == '/' && strPath[1] == '/'))
    {
        return true;
    }
    return false;
}


FileUtils::Status FileUtilsWin32::getContents(const std::string& filename, ResizableBuffer* buffer)
{
    if (filename.empty())
        return FileUtils::Status::NotExists;

    // read the file from hardware
    std::string fullPath = FileUtils::getInstance()->fullPathForFilename(filename);

    HANDLE fileHandle = ::CreateFile(StringUtf8ToWideChar(fullPath).c_str(), GENERIC_READ, FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_EXISTING, NULL, nullptr);
    if (fileHandle == INVALID_HANDLE_VALUE)
        return FileUtils::Status::OpenFailed;

	DWORD hi;
    auto size = ::GetFileSize(fileHandle, &hi);
	if (hi > 0)
	{
		::CloseHandle(fileHandle);
		return FileUtils::Status::TooLarge;
	}
    // don't read file content if it is empty
    if (size == 0)
    {
        ::CloseHandle(fileHandle);
        return FileUtils::Status::OK;
    }

    buffer->resize(size);
    DWORD sizeRead = 0;
    BOOL successed = ::ReadFile(fileHandle, buffer->buffer(), size, &sizeRead, nullptr);
    ::CloseHandle(fileHandle);

    if (!successed) {
		CCLOG("Get data from file(%s) failed, error code is %s", filename.data(), std::to_string(::GetLastError()).data());
		buffer->resize(sizeRead);
		return FileUtils::Status::ReadFailed;
    }
    return FileUtils::Status::OK;
}

std::string FileUtilsWin32::getPathForFilename(const std::string& filename, const std::string& resolutionDirectory, const std::string& searchPath) const
{
    std::string unixFileName = convertPathFormatToUnixStyle(filename);
    std::string unixResolutionDirectory = convertPathFormatToUnixStyle(resolutionDirectory);
    std::string unixSearchPath = convertPathFormatToUnixStyle(searchPath);

    return FileUtils::getPathForFilename(unixFileName, unixResolutionDirectory, unixSearchPath);
}

std::string FileUtilsWin32::getFullPathForDirectoryAndFilename(const std::string& strDirectory, const std::string& strFilename) const
{
    std::string unixDirectory = convertPathFormatToUnixStyle(strDirectory);
    std::string unixFilename = convertPathFormatToUnixStyle(strFilename);

    return FileUtils::getFullPathForDirectoryAndFilename(unixDirectory, unixFilename);
}

string FileUtilsWin32::getWritablePath() const
{
    if (_writablePath.length())
    {
        return _writablePath;
    }

    // Get full path of executable, e.g. c:\Program Files (x86)\My Game Folder\MyGame.exe
    WCHAR full_path[CC_MAX_PATH + 1] = { 0 };
    ::GetModuleFileName(nullptr, full_path, CC_MAX_PATH + 1);

    // Debug app uses executable directory; Non-debug app uses local app data directory
//#ifndef _DEBUG
    // Get filename of executable only, e.g. MyGame.exe
    WCHAR *base_name = wcsrchr(full_path, '\\');
    wstring retPath;
    if(base_name)
    {
        WCHAR app_data_path[CC_MAX_PATH + 1];

        // Get local app data directory, e.g. C:\Documents and Settings\username\Local Settings\Application Data
        if (SUCCEEDED(SHGetFolderPath(nullptr, CSIDL_LOCAL_APPDATA, nullptr, SHGFP_TYPE_CURRENT, app_data_path)))
        {
            wstring ret(app_data_path);

            // Adding executable filename, e.g. C:\Documents and Settings\username\Local Settings\Application Data\MyGame.exe
            ret += base_name;

            // Remove ".exe" extension, e.g. C:\Documents and Settings\username\Local Settings\Application Data\MyGame
            ret = ret.substr(0, ret.rfind(L"."));

            ret += L"\\";

            // Create directory
            if (SUCCEEDED(SHCreateDirectoryEx(nullptr, ret.c_str(), nullptr)))
            {
                retPath = ret;
            }
        }
    }
    if (retPath.empty())
//#endif // not defined _DEBUG
    {
        // If fetching of local app data directory fails, use the executable one
        retPath = full_path;

        // remove xxx.exe
        retPath = retPath.substr(0, retPath.rfind(L"\\") + 1);
    }

    return convertPathFormatToUnixStyle(StringWideCharToUtf8(retPath));
}

bool FileUtilsWin32::renameFile(const std::string &oldfullpath, const std::string& newfullpath)
{
    CCASSERT(!oldfullpath.empty(), "Invalid path");
    CCASSERT(!newfullpath.empty(), "Invalid path");

    std::wstring _wNew = StringUtf8ToWideChar(newfullpath);
    std::wstring _wOld = StringUtf8ToWideChar(oldfullpath);

    if (FileUtils::getInstance()->isFileExist(newfullpath))
    {
        if (!DeleteFile(_wNew.c_str()))
        {
            CCLOGERROR("Fail to delete file %s !Error code is 0x%x", newfullpath.c_str(), GetLastError());
        }
    }

    if (MoveFile(_wOld.c_str(), _wNew.c_str()))
    {
        return true;
    }
    else
    {
        CCLOGERROR("Fail to rename file %s to %s !Error code is 0x%x", oldfullpath.c_str(), newfullpath.c_str(), GetLastError());
        return false;
    }
}

bool FileUtilsWin32::renameFile(const std::string &path, const std::string &oldname, const std::string &name)
{
    CCASSERT(!path.empty(), "Invalid path");
    std::string oldPath = path + oldname;
    std::string newPath = path + name;

    std::regex pat("\\/");
    std::string _old = std::regex_replace(oldPath, pat, "\\");
    std::string _new = std::regex_replace(newPath, pat, "\\");

    return renameFile(_old, _new);
}

bool FileUtilsWin32::createDirectory(const std::string& dirPath)
{
    CCASSERT(!dirPath.empty(), "Invalid path");

    if (isDirectoryExist(dirPath))
        return true;

    std::wstring path = StringUtf8ToWideChar(dirPath);

    // Split the path
    size_t start = 0;
    size_t found = path.find_first_of(L"/\\", start);
    std::wstring subpath;
    std::vector<std::wstring> dirs;

    if (found != std::wstring::npos)
    {
        while (true)
        {
            subpath = path.substr(start, found - start + 1);
            if (!subpath.empty())
                dirs.push_back(subpath);
            start = found + 1;
            found = path.find_first_of(L"/\\", start);
            if (found == std::wstring::npos)
            {
                if (start < path.length())
                {
                    dirs.push_back(path.substr(start));
                }
                break;
            }
        }
    }

    if ((GetFileAttributes(path.c_str())) == INVALID_FILE_ATTRIBUTES)
    {
        subpath = L"";
        for (unsigned int i = 0; i < dirs.size(); ++i)
        {
            subpath += dirs[i];

            std::string utf8Path = StringWideCharToUtf8(subpath);
            if (!isDirectoryExist(utf8Path))
            {
                BOOL ret = CreateDirectory(subpath.c_str(), NULL);
                if (!ret && ERROR_ALREADY_EXISTS != GetLastError())
                {
                    CCLOGERROR("Fail create directory %s !Error code is 0x%x", utf8Path.c_str(), GetLastError());
                    return false;
                }
            }
        }
    }
    return true;
}

bool FileUtilsWin32::removeFile(const std::string &filepath)
{
    std::regex pat("\\/");
    std::string win32path = std::regex_replace(filepath, pat, "\\");

    if (DeleteFile(StringUtf8ToWideChar(win32path).c_str()))
    {
        return true;
    }
    else
    {
        CCLOGERROR("Fail remove file %s !Error code is 0x%x", filepath.c_str(), GetLastError());
        return false;
    }
}

bool FileUtilsWin32::removeDirectory(const std::string& dirPath)
{
    std::wstring wpath = StringUtf8ToWideChar(dirPath);
    std::wstring files = wpath + L"*.*";
    WIN32_FIND_DATA wfd;
    HANDLE  search = FindFirstFileEx(files.c_str(), FindExInfoStandard, &wfd, FindExSearchNameMatch, NULL, 0);
    bool ret = true;
    if (search != INVALID_HANDLE_VALUE)
    {
        BOOL find = true;
        while (find)
        {
            // Need check string . and .. for delete folders and files begin name.
            std::wstring fileName = wfd.cFileName;
            if (fileName != L"." && fileName != L"..")
            {
                std::wstring temp = wpath + wfd.cFileName;
                if (wfd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
                {
                    temp += '/';
                    ret = ret && this->removeDirectory(StringWideCharToUtf8(temp));
                }
                else
                {
                    SetFileAttributes(temp.c_str(), FILE_ATTRIBUTE_NORMAL);
                    ret = ret && DeleteFile(temp.c_str());
                }
            }
            find = FindNextFile(search, &wfd);
        }
        FindClose(search);
    }
    if (ret && RemoveDirectory(wpath.c_str()))
    {
        return true;
    }
    return false;
}

NS_CC_END

#endif // CC_TARGET_PLATFORM == CC_PLATFORM_WIN32