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// license:BSD-3-Clause
// copyright-holders:Aaron Giles,R. Belmont
/***************************************************************************
dvdrom.c
Generic MAME DVD-ROM utilties - build IDE and SCSI DVD-ROMs on top of this
***************************************************************************/
#include "dvdrom.h"
#include "corestr.h"
#include "osdfile.h"
#include "strformat.h"
#include <cassert>
#include <cstdlib>
/**
* @fn constructor
*
* @brief Open a dvdrom for a file.
*
* @param inputfile The inputfile.
*/
dvdrom_file::dvdrom_file(std::string_view inputfile)
{
fhandle = nullptr;
}
/*-------------------------------------------------
constructor - "open" a DVD-ROM file from an
already-opened CHD file
-------------------------------------------------*/
/**
* @fn dvdrom_file *dvdrom_open(chd_file *chd)
*
* @brief Queries if a given dvdrom open.
*
* @param [in,out] chd If non-null, the chd.
*
* @return null if it fails, else a dvdrom_file*.
*/
dvdrom_file::dvdrom_file(chd_file *_chd)
{
chd = _chd;
/* validate the CHD information */
if (chd->hunk_bytes() != 2048)
throw nullptr;
if (chd->unit_bytes() != 2048)
throw nullptr;
/* check it's actually a DVD-ROM */
if (std::error_condition err = chd->check_is_dvd())
throw err;
sector_count = chd->unit_count();
}
/*-------------------------------------------------
destructor - "close" a DVD-ROM file
-------------------------------------------------*/
dvdrom_file::~dvdrom_file()
{
}
/***************************************************************************
CORE READ ACCESS
***************************************************************************/
/*-------------------------------------------------
dvdrom_read_data - read one 2048 bytes sector
from a DVD-ROM
-------------------------------------------------*/
/**
* @fn bool read_data(uint32_t lbasector, void *buffer)
*
* @brief Dvdrom read data.
*
* @param lbasector The lbasector.
* @param buffer The buffer.
*
* @return Success status.
*/
std::error_condition dvdrom_file::read_data(uint32_t lbasector, void *buffer)
{
if (lbasector >= sector_count)
return std::error_condition(chd_file::error::HUNK_OUT_OF_RANGE);
return chd->read_hunk(lbasector, buffer);
}
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