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/******************************************************************************
* Project: PROJ
* Purpose: File manager
* Author: Even Rouault, <even.rouault at spatialys.com>
*
******************************************************************************
* Copyright (c) 2019, Even Rouault, <even.rouault at spatialys.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*****************************************************************************/
#ifndef FILEMANAGER_HPP_INCLUDED
#define FILEMANAGER_HPP_INCLUDED
#include <memory>
#include <string>
#include <vector>
#include "proj.h"
#include "proj/util.hpp"
//! @cond Doxygen_Suppress
NS_PROJ_START
class File;
enum class FileAccess {
READ_ONLY, // "rb"
READ_UPDATE, // "r+b"
CREATE, // "w+b"
};
class FileManager {
private:
FileManager() = delete;
public:
// "Low-level" interface.
static PROJ_DLL std::unique_ptr<File>
open(PJ_CONTEXT *ctx, const char *filename, FileAccess access);
static PROJ_DLL bool exists(PJ_CONTEXT *ctx, const char *filename);
static bool mkdir(PJ_CONTEXT *ctx, const char *filename);
static bool unlink(PJ_CONTEXT *ctx, const char *filename);
static bool rename(PJ_CONTEXT *ctx, const char *oldPath,
const char *newPath);
static std::string getProjLibEnvVar(PJ_CONTEXT *ctx);
// "High-level" interface, honoring PROJ_LIB and the like.
static std::unique_ptr<File> open_resource_file(PJ_CONTEXT *ctx,
const char *name);
static void fillDefaultNetworkInterface(PJ_CONTEXT *ctx);
static void clearMemoryCache();
};
// ---------------------------------------------------------------------------
class File {
protected:
std::string name_;
std::string readLineBuffer_{};
bool eofReadLine_ = false;
explicit File(const std::string &name);
public:
virtual PROJ_DLL ~File();
virtual size_t read(void *buffer, size_t sizeBytes) = 0;
virtual size_t write(const void *buffer, size_t sizeBytes) = 0;
virtual bool seek(unsigned long long offset, int whence = SEEK_SET) = 0;
virtual unsigned long long tell() = 0;
virtual void reassign_context(PJ_CONTEXT *ctx) = 0;
virtual bool hasChanged() const = 0;
std::string PROJ_DLL read_line(size_t maxLen, bool &maxLenReached,
bool &eofReached);
const std::string &name() const { return name_; }
};
// ---------------------------------------------------------------------------
std::unique_ptr<File> pj_network_file_open(PJ_CONTEXT *ctx,
const char *filename);
NS_PROJ_END
// Exported for projsync
std::vector<std::string> PROJ_DLL pj_get_default_searchpaths(PJ_CONTEXT *ctx);
//! @endcond Doxygen_Suppress
#endif // FILEMANAGER_HPP_INCLUDED
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