epee::file_io_utils Namespace Reference

Functions
bool	is_file_exist (const std::string &path)
bool	save_string_to_file (const std::string &path_to_file, const std::string &str)
bool	get_file_time (const std::string &path_to_file, time_t &ft)
bool	set_file_time (const std::string &path_to_file, const time_t &ft)
bool	load_file_to_string (const std::string &path_to_file, std::string &target_str, size_t max_size=1000000000)
bool	append_string_to_file (const std::string &path_to_file, const std::string &str)
bool	get_file_size (const std::string &path_to_file, uint64_t &size)

Function Documentation

append_string_to_file()

bool epee::file_io_utils::append_string_to_file ( const std::string & path_to_file, const std::string & str )

inline

Definition at line 179 of file file_io_utils.h.

    {
                // No special Windows implementation because so far not used in Electroneum code
        try
        {
            std::ofstream fstream;
            fstream.exceptions(std::ifstream::failbit | std::ifstream::badbit);
            fstream.open(path_to_file.c_str(), std::ios_base::binary | std::ios_base::out | std::ios_base::app);
            fstream << str;
            fstream.close();
            return true;
        }
 
        catch(...)
        {
            return false;
        }
    }

get_file_size()

bool epee::file_io_utils::get_file_size ( const std::string & path_to_file, uint64_t & size )

inline

Definition at line 199 of file file_io_utils.h.

    {
#ifdef WIN32
                std::wstring wide_path;
                try { wide_path = string_tools::utf8_to_utf16(path_to_file); } catch (...) { return false; }
                HANDLE file_handle = CreateFileW(wide_path.c_str(), GENERIC_READ, 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
                if (file_handle == INVALID_HANDLE_VALUE)
                    return false;
                LARGE_INTEGER file_size;
                BOOL result = GetFileSizeEx(file_handle, &file_size);
                CloseHandle(file_handle);
                if (result) {
                    size = file_size.QuadPart;
                }
                return size;
#else
        try
        {
            std::ifstream fstream;
            fstream.exceptions(std::ifstream::failbit | std::ifstream::badbit);
            fstream.open(path_to_file, std::ios_base::binary | std::ios_base::in | std::ios::ate);
            size = fstream.tellg();
            fstream.close();
            return true;
        }
 
        catch(...)
        {
            return false;
        }
#endif
    }

get_file_time()

bool epee::file_io_utils::get_file_time ( const std::string & path_to_file, time_t & ft )

inline

Definition at line 107 of file file_io_utils.h.

    {
        boost::system::error_code ec;
        ft = boost::filesystem::last_write_time(boost::filesystem::path(path_to_file), ec);
        if(!ec)
            return true;
        else
            return false;
    }

is_file_exist()

bool epee::file_io_utils::is_file_exist ( const std::string & path )

inline

Definition at line 66 of file file_io_utils.h.

    {
        boost::filesystem::path p(path);
        return boost::filesystem::exists(p);
    }

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load_file_to_string()

bool epee::file_io_utils::load_file_to_string ( const std::string & path_to_file, std::string & target_str, size_t max_size = 1000000000 )

inline

Definition at line 130 of file file_io_utils.h.

    {
#ifdef WIN32
                std::wstring wide_path;
                try { wide_path = string_tools::utf8_to_utf16(path_to_file); } catch (...) { return false; }
                HANDLE file_handle = CreateFileW(wide_path.c_str(), GENERIC_READ, 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
                if (file_handle == INVALID_HANDLE_VALUE)
                    return false;
                DWORD file_size = GetFileSize(file_handle, NULL);
                if ((file_size == INVALID_FILE_SIZE) || (uint64_t)file_size > (uint64_t)max_size) {
                    CloseHandle(file_handle);
                    return false;
                }
                target_str.resize(file_size);
                DWORD bytes_read;
                BOOL result = ReadFile(file_handle, &target_str[0], file_size, &bytes_read, NULL);
                CloseHandle(file_handle);
                if (bytes_read != file_size)
                    result = FALSE;
                return result;
#else
        try
        {
            std::ifstream fstream;
            fstream.exceptions(std::ifstream::failbit | std::ifstream::badbit);
            fstream.open(path_to_file, std::ios_base::binary | std::ios_base::in | std::ios::ate);
 
            std::ifstream::pos_type file_size = fstream.tellg();
            
            if((uint64_t)file_size > (uint64_t)max_size) // ensure a large domain for comparison, and negative -> too large
                return false;//don't go crazy
            size_t file_size_t = static_cast<size_t>(file_size);
 
            target_str.resize(file_size_t);
 
            fstream.seekg (0, std::ios::beg);
            fstream.read((char*)target_str.data(), target_str.size());
            fstream.close();
            return true;
        }
 
        catch(...)
        {
            return false;
        }
#endif
    }

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save_string_to_file()

bool epee::file_io_utils::save_string_to_file ( const std::string & path_to_file, const std::string & str )

inline

Definition at line 73 of file file_io_utils.h.

    {
#ifdef WIN32
                std::wstring wide_path;
                try { wide_path = string_tools::utf8_to_utf16(path_to_file); } catch (...) { return false; }
                HANDLE file_handle = CreateFileW(wide_path.c_str(), GENERIC_WRITE, 0, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
                if (file_handle == INVALID_HANDLE_VALUE)
                    return false;
                DWORD bytes_written;
                DWORD bytes_to_write = (DWORD)str.size();
                BOOL result = WriteFile(file_handle, str.data(), bytes_to_write, &bytes_written, NULL);
                CloseHandle(file_handle);
                if (bytes_written != bytes_to_write)
                    result = FALSE;
                return result;
#else
        try
        {
            std::ofstream fstream;
            fstream.exceptions(std::ifstream::failbit | std::ifstream::badbit);
            fstream.open(path_to_file, std::ios_base::binary | std::ios_base::out | std::ios_base::trunc);
            fstream << str;
            fstream.close();
            return true;
        }
 
        catch(...)
        {
            return false;
        }
#endif
    }

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set_file_time()

bool epee::file_io_utils::set_file_time ( const std::string & path_to_file, const time_t & ft )

inline

Definition at line 118 of file file_io_utils.h.

    {
        boost::system::error_code ec;
        boost::filesystem::last_write_time(boost::filesystem::path(path_to_file), ft, ec);
        if(!ec)
            return true;
        else
            return false;
    }