FileSystem.h

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// -                        Open3D: www.open3d.org                            -
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// The MIT License (MIT)
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// Copyright (c) 2018 www.open3d.org
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#pragma once

#include <string>
#include <vector>

namespace open3d {
namespace utility {
namespace filesystem {

std::string GetFileExtensionInLowerCase(const std::string &filename);

std::string GetFileNameWithoutExtension(const std::string &filename);

std::string GetFileNameWithoutDirectory(const std::string &filename);

std::string GetFileParentDirectory(const std::string &filename);

std::string GetRegularizedDirectoryName(const std::string &directory);

std::string GetWorkingDirectory();

std::vector<std::string> GetPathComponents(const std::string &path);

bool ChangeWorkingDirectory(const std::string &directory);

bool DirectoryExists(const std::string &directory);

bool MakeDirectory(const std::string &directory);

bool MakeDirectoryHierarchy(const std::string &directory);

bool DeleteDirectory(const std::string &directory);

bool FileExists(const std::string &filename);

bool RemoveFile(const std::string &filename);

bool ListDirectory(const std::string &directory,
                   std::vector<std::string> &subdirs,
                   std::vector<std::string> &filenames);

bool ListFilesInDirectory(const std::string &directory,
                          std::vector<std::string> &filenames);

bool ListFilesInDirectoryWithExtension(const std::string &directory,
                                       const std::string &extname,
                                       std::vector<std::string> &filenames);

// wrapper for fopen that enables unicode paths on Windows
FILE *FOpen(const std::string &filename, const std::string &mode);
std::string GetIOErrorString(const int errnoVal);
bool FReadToBuffer(const std::string &path,
                   std::vector<char> &bytes,
                   std::string *errorStr);

class CFile {
public:
    ~CFile();
    bool Open(const std::string &filename, const std::string &mode);
    std::string GetError();
    void Close();
    int64_t CurPos();
    int64_t GetFileSize();
    const char *ReadLine();
    template <class T>
    size_t ReadData(T *data, size_t num_elems) {
        return ReadData(data, sizeof(T), num_elems);
    }
    size_t ReadData(void *data, size_t elem_size, size_t num_elems);
    FILE *GetFILE() { return file_; }

private:
    FILE *file_ = nullptr;
    int error_code_ = 0;
    std::vector<char> line_buffer_;
};

}  // namespace filesystem
}  // namespace utility
}  // namespace open3d