axmol/core/platform/winrt/CCFileUtilsWinRT.cpp

/****************************************************************************
Copyright (c) 2010 cocos2d-x.org
Copyright (c) Microsoft Open Technologies, Inc.
Copyright (c) 2017-2018 Xiamen Yaji Software Co., Ltd.

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#include "platform/winrt/CCFileUtilsWinRT.h"
#include <regex>
#include "platform/winrt/CCWinRTUtils.h"
#include "platform/CCCommon.h"
#include "ntcvt/ntcvt.hpp"

NS_AX_BEGIN

#define AX_MAX_PATH 512

static std::string s_pszResourcePath;

// D:\aaa\bbb\ccc\ddd\abc.txt --> D:/aaa/bbb/ccc/ddd/abc.txt
// D:\aaa\bbb\ccc\ddd\abc.txt --> D:/aaa/bbb/ccc/ddd/abc.txt
static std::string convertPathFormatToUnixStyle(const std::string_view& path)
{
    std::string ret{path};
    std::replace(ret.begin(), ret.end(), '\\', '/');
    return ret;
}

static std::string convertPathFormatToWinStyle(const std::string_view& path)
{
    std::string ret{path};
    std::replace(ret.begin(), ret.end(), '/', '\\');
    return ret;
}

static void _checkPath()
{
    if (s_pszResourcePath.empty())
    {
        // TODO: needs to be tested
        s_pszResourcePath = FileUtilsWinRT::getAppPath() + '\\' + "Content\\";
        std::replace(s_pszResourcePath.begin(), s_pszResourcePath.end(), '\\', '/');
    }
}

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

std::string FileUtilsWinRT::getNativeWritableAbsolutePath() const {
    if (!_writablePath.empty())
    {
        return _writablePath;
    }

    auto localFolderPath = Windows::Storage::ApplicationData::Current->LocalFolder->Path;
    std::string ret      = PlatformStringToString(localFolderPath);
    ret += '\\';
    std::replace(ret.begin(), ret.end(), '\\', '/');
    return ret;
}

FileUtilsWinRT::FileUtilsWinRT()
{
}

bool FileUtilsWinRT::init()
{
    _checkPath();
    _defaultResRootPath = s_pszResourcePath;
    return FileUtils::init();
}

std::string FileUtilsWinRT::getPathForFilename(std::string_view filename, std::string_view resolutionDirectory) const
{
    std::string unixFileName = convertPathFormatToUnixStyle(filename);
    std::string unixResolutionDirectory = convertPathFormatToUnixStyle(resolutionDirectory);
    // std::string unixSearchPath = convertPathFormatToUnixStyle(searchPath);

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

std::string FileUtilsWinRT::getFullPathForFilenameWithinDirectory(std::string_view strDirectory, std::string_view strFilename) const
{
    std::string unixDirectory = convertPathFormatToUnixStyle(strDirectory);
    std::string unixFilename = convertPathFormatToUnixStyle(strFilename);
    return FileUtils::getFullPathForFilenameWithinDirectory(unixDirectory, unixFilename);
}

int64_t FileUtilsWinRT::getFileSize(std::string_view filepath) const
{
    WIN32_FILE_ATTRIBUTE_DATA fad;
    if (!GetFileAttributesEx(ntcvt::from_chars(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;
}

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

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

    HANDLE fileHandle = ::CreateFile2(ntcvt::from_chars(fullPath).c_str(), GENERIC_READ, FILE_SHARE_READ | FILE_SHARE_WRITE, OPEN_EXISTING, nullptr);
    if (fileHandle == INVALID_HANDLE_VALUE)
        return FileUtils::Status::OpenFailed;

    FILE_STANDARD_INFO info = {0};
    if (::GetFileInformationByHandleEx(fileHandle, FileStandardInfo, &info, sizeof(info)) == 0)
    {
        ::CloseHandle(fileHandle);
        return FileUtils::Status::OpenFailed;
    }

    if (info.EndOfFile.HighPart > 0)
    {
        ::CloseHandle(fileHandle);
        return FileUtils::Status::TooLarge;
    }

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

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

bool FileUtilsWinRT::isFileExistInternal(std::string_view strFilePath) const
{
    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(ntcvt::from_chars(strPath).c_str());
    return (attr != INVALID_FILE_ATTRIBUTES && !(attr & FILE_ATTRIBUTE_DIRECTORY));
}

bool FileUtilsWinRT::isDirectoryExistInternal(std::string_view dirPath) const
{
    uint32_t fAttrib = GetFileAttributesW(ntcvt::from_chars(dirPath).c_str());
    return (fAttrib != INVALID_FILE_ATTRIBUTES && (fAttrib & FILE_ATTRIBUTE_DIRECTORY));
}

bool FileUtilsWinRT::createDirectory(std::string_view path) const
{
    AXASSERT(!path.empty(), "Invalid path");

    if (isDirectoryExist(path))
        return true;

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

    if (found != std::string::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("/\\", start);
            if (found == std::string::npos)
            {
                if (start < path.length())
                {
                    dirs.emplace_back(path.substr(start));
                }
                break;
            }
        }
    }

    WIN32_FILE_ATTRIBUTE_DATA wfad;

    if (!(GetFileAttributesEx(ntcvt::from_chars(path).c_str(), GetFileExInfoStandard, &wfad)))
    {
        subpath = "";
        for (unsigned int i = 0, size = dirs.size(); i < size; ++i)
        {
            subpath += dirs[i];
            if (i > 0 && !isDirectoryExist(subpath))
            {
                BOOL ret = CreateDirectory(ntcvt::from_chars(subpath).c_str(), NULL);
                if (!ret && ERROR_ALREADY_EXISTS != GetLastError())
                {
                    return false;
                }
            }
        }
    }
    return true;
}

bool FileUtilsWinRT::removeDirectory(std::string_view path) const
{
    std::wstring wpath = ntcvt::from_chars(path);
    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)
        {
            //. ..
            if (wfd.cFileName[0] != '.')
            {
                std::wstring temp = wpath + wfd.cFileName;
                if (wfd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
                {
                    temp += '/';
                    ret = ret && this->removeDirectory(ntcvt::from_chars(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;
}

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

bool FileUtilsWinRT::removeFile(std::string_view path) const
{
    std::wstring wpath = ntcvt::from_chars(path);
    if (DeleteFile(wpath.c_str()))
    {
        return true;
    }
    else
    {
        AXLOG("Remove file failed with error: %d", GetLastError());
        return false;
    }
}

bool FileUtilsWinRT::renameFile(std::string_view oldfullpath, std::string_view newfullpath) const
{
    AXASSERT(!oldfullpath.empty(), "Invalid path");
    AXASSERT(!newfullpath.empty(), "Invalid path");

    std::regex pat("\\/");
    std::string _oldfullpath{oldfullpath};
    std::string _newfullpath{newfullpath};
    convertPathFormatToWinStyle(_oldfullpath);
    convertPathFormatToWinStyle(_newfullpath);

    std::wstring _wNewfullpath = ntcvt::from_chars(_newfullpath);

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

    if (MoveFileEx(ntcvt::from_chars(_oldfullpath).c_str(), _wNewfullpath.c_str(),
        MOVEFILE_REPLACE_EXISTING & MOVEFILE_WRITE_THROUGH))
    {
        return true;
    }
    else
    {
        AXLOGERROR("Fail to rename file %s to %s !Error code is 0x%x", oldfullpath.data(), newfullpath.data(), GetLastError());
        return false;
    }
}

bool FileUtilsWinRT::renameFile(std::string_view path, std::string_view oldname, std::string_view name) const
{
    AXASSERT(!path.empty(), "Invalid path");
    std::string oldPath{path};
    oldPath += oldname;
    std::string newPath{path};
    newPath += name;

    return renameFile(oldPath, newPath);
}

std::string FileUtilsWinRT::getWritablePath() const
{
    return getNativeWritableAbsolutePath();
}

std::string FileUtilsWinRT::getAppPath()
{
    Windows::ApplicationModel::Package^ package = Windows::ApplicationModel::Package::Current;
    return convertPathFormatToUnixStyle(std::string(PlatformStringToString(package->InstalledLocation->Path)));
}

NS_AX_END