FATFileHandle.cpp

#include "ff.h"
#include "ffconf.h"

#include "FATFileHandle.h"

FATFileHandle::FATFileHandle(FIL fh)
{
    _fh = fh;
}

int FATFileHandle::close()
{
    int retval = f_close(&_fh);
    delete this;
    return retval;
}

ssize_t FATFileHandle::write(const void *buffer, size_t length)
{
    UI n;
    FRESULT res = f_write(&_fh, buffer, length, &n);
    if (res)
    {
        return -1;
    }
    return n;
}

ssize_t FATFileHandle::read(void *buffer, size_t length)
{
    UI n;
    FRESULT res = f_read(&_fh, buffer, length, &n);
    if (res)
    {
        return -1;
    }
    return n;
}

int FATFileHandle::isatty()
{
    return 0;
}

off_t FATFileHandle::lseek(off_t position, int whence)
{
    if (whence == SEEK_END)
    {
        position += _fh.fsize;
    }
    else if (whence == SEEK_CUR)
    {
        position += _fh.fptr;
    }
    FRESULT res = f_lseek(&_fh, position);
    if (res)
    {
        return -1;
    }
    else
    {
        return _fh.fptr;
    }
}

int FATFileHandle::fsync()
{
    FRESULT res = f_sync(&_fh);
    if (res)
    {
        return -1;
    }
    return 0;
}