SingleFile.cpp

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#include "stdafx.h"
#include "SingleFile.h"

SingleFile::SingleFile() : m_file(NULL)
{
        setLoggerName("SingleFile");
}

SingleFile::~SingleFile()
{
        close();
}

void SingleFile::removeFile(const std::string& path)
{
        std::remove(path.c_str());
}

int SingleFile::open(const std::string& path, Mode mode, int shflag)
{
        std::string fmode;
        if (mode == IFile::ReadOnly)
        {
                fmode = "rbN";
        }
        else if (mode == IFile::ReadWriteCreate)
        {
                if (access(path.c_str(), 0) == 0)
                {
                        fmode = "r+bcN";
                }
                else
                {
                        fmode = "wbcN";
                }
        }
        m_file = _fsopen(path.c_str(), fmode.c_str(), shflag);
        return (m_file != NULL ? 0 : 1);
}

size_t SingleFile::write(const void* data, size_t element_size, size_t nelement)
{
        return fwrite(data, element_size, nelement, m_file);
}

size_t SingleFile::read(void* data, size_t element_size, size_t nelement)
{
        return fread(data, element_size, nelement, m_file);
}

int SingleFile::close()
{
        int ret = 0;
        if (m_file != NULL)
        {
                ret = fclose(m_file);
                m_file = NULL;
        }
        return ret;
}

int SingleFile::seek(int64_t offset, int whence)
{
        return fseek(m_file, offset, whence);
}

int SingleFile::discardContents()
{
        return _chsize(fileno(m_file), 0);
}

bool SingleFile::isOpen() const
{
        return m_file != NULL;
}

int SingleFile::flush()
{
        return fflush(m_file);
}