static int blk_read(void *buf, int len, const char *path, int offset)
{
void *handle;
int ret;
ret = bchlib_setup(path, true, &handle);
if (ret)
{
return ret;
}
ret = bchlib_read(handle, buf, offset, len);
bchlib_teardown(handle);
return ret;
}
static ssize_t bch_read(FAR struct file *filep, FAR char *buffer, size_t len)
{
FAR struct inode *inode = filep->f_inode;
FAR struct bchlib_s *bch;
int ret;
DEBUGASSERT(inode && inode->i_private);
bch = (FAR struct bchlib_s *)inode->i_private;
bchlib_semtake(bch);
ret = bchlib_read(bch, buffer, filep->f_pos, len);
if (ret > 0)
{
filep->f_pos += len;
}
bchlib_semgive(bch);
return ret;
}
static int dd_readblk(struct dd_s *dd)
{
ssize_t nbytes;
off_t offset = dd->sector * dd->sectsize;
nbytes = bchlib_read(DD_INHANDLE, (char*)dd->buffer, offset, dd->sectsize);
if (nbytes < 0)
{
FAR struct nsh_vtbl_s *vtbl = dd->vtbl;
nsh_output(vtbl, g_fmtcmdfailed, g_dd, "bshlib_read", NSH_ERRNO_OF(-nbytes));
return ERROR;
}
/* bchlib_read return 0 on attempts to write past the end of the device. */
dd->nbytes = nbytes;
dd->eof = (nbytes == 0);
return OK;
}
