// license:BSD-3-Clause // copyright-holders:Nathan Woods, Raphael Nabet, Miodrag Milanovic /********************************************************************* Code to interface the image code with harddisk core. Raphael Nabet 2003 Update: 23-Feb-2004 - Unlike floppy disks, for which we support myriad formats on many systems, it is my intention for MESS to standardize on the CHD file format for hard drives so I made a few changes to support this *********************************************************************/ #include "emu.h" #include "harddriv.h" #include "emuopts.h" #include "harddisk.h" #include "romload.h" OPTION_GUIDE_START(hd_option_guide) OPTION_INT('C', "cylinders", "Cylinders") OPTION_INT('H', "heads", "Heads") OPTION_INT('S', "sectors", "Sectors") OPTION_INT('L', "sectorlength", "Sector Bytes") OPTION_INT('K', "hunksize", "Hunk Bytes") OPTION_GUIDE_END static const char *hd_option_spec = "C1-[512]-1024;H1/2/[4]/8;S1-[16]-64;L128/256/[512]/1024;K512/1024/2048/[4096]"; // device type definition DEFINE_DEVICE_TYPE(HARDDISK, harddisk_image_device, "harddisk_image", "Harddisk") //------------------------------------------------- // harddisk_image_device - constructor //------------------------------------------------- harddisk_image_device::harddisk_image_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : harddisk_image_device(mconfig, HARDDISK, tag, owner, clock) { } //------------------------------------------------- // harddisk_image_device - constructor for subclasses //------------------------------------------------- harddisk_image_device::harddisk_image_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock) : device_t(mconfig, type, tag, owner, clock), device_image_interface(mconfig, *this), m_chd(nullptr), m_hard_disk_handle(nullptr), m_device_image_load(device_image_load_delegate()), m_device_image_unload(device_image_func_delegate()), m_interface(nullptr) { } //------------------------------------------------- // harddisk_image_device - destructor //------------------------------------------------- harddisk_image_device::~harddisk_image_device() { } //------------------------------------------------- // device_config_complete - perform any // operations now that the configuration is // complete //------------------------------------------------- void harddisk_image_device::device_config_complete() { add_format("chd", "CHD Hard drive", "chd,hd", hd_option_spec); } const util::option_guide &harddisk_image_device::create_option_guide() const { return hd_option_guide; } //------------------------------------------------- // device_start - device-specific startup //------------------------------------------------- void harddisk_image_device::device_start() { m_chd = nullptr; // try to locate the CHD from a DISK_REGION chd_file *handle = machine().rom_load().get_disk_handle(tag()); if (handle != nullptr) { m_hard_disk_handle = hard_disk_open(handle); } else { m_hard_disk_handle = nullptr; } } void harddisk_image_device::device_stop() { if (m_hard_disk_handle != nullptr) { hard_disk_close(m_hard_disk_handle); m_hard_disk_handle = nullptr; } } image_init_result harddisk_image_device::call_load() { image_init_result our_result; our_result = internal_load_hd(); /* Check if there is an image_load callback defined */ if (!m_device_image_load.isnull()) { /* Let the override do some additional work/checks */ our_result = m_device_image_load(*this); } return our_result; } image_init_result harddisk_image_device::call_create(int create_format, util::option_resolution *create_args) { int err; uint32_t sectorsize, hunksize; uint32_t cylinders, heads, sectors, totalsectors; assert_always(create_args != nullptr, "Expected create_args to not be nullptr"); cylinders = create_args->lookup_int('C'); heads = create_args->lookup_int('H'); sectors = create_args->lookup_int('S'); sectorsize = create_args->lookup_int('L'); hunksize = create_args->lookup_int('K'); totalsectors = cylinders * heads * sectors; /* create the CHD file */ chd_codec_type compression[4] = { CHD_CODEC_NONE }; err = m_origchd.create(image_core_file(), (uint64_t)totalsectors * (uint64_t)sectorsize, hunksize, sectorsize, compression); if (err != CHDERR_NONE) goto error; /* if we created the image and hence, have metadata to set, set the metadata */ err = m_origchd.write_metadata(HARD_DISK_METADATA_TAG, 0, string_format(HARD_DISK_METADATA_FORMAT, cylinders, heads, sectors, sectorsize)); m_origchd.close(); if (err != CHDERR_NONE) goto error; return internal_load_hd(); error: return image_init_result::FAIL; } void harddisk_image_device::call_unload() { /* Check if there is an image_unload callback defined */ if ( !m_device_image_unload.isnull() ) { m_device_image_unload(*this); } if (m_hard_disk_handle != nullptr) { hard_disk_close(m_hard_disk_handle); m_hard_disk_handle = nullptr; } m_origchd.close(); m_diffchd.close(); m_chd = nullptr; } /*------------------------------------------------- open_disk_diff - open a DISK diff file -------------------------------------------------*/ static chd_error open_disk_diff(emu_options &options, const char *name, chd_file &source, chd_file &diff_chd) { std::string fname = std::string(name).append(".dif"); /* try to open the diff */ //printf("Opening differencing image file: %s\n", fname.c_str()); emu_file diff_file(options.diff_directory(), OPEN_FLAG_READ | OPEN_FLAG_WRITE); osd_file::error filerr = diff_file.open(fname.c_str()); if (filerr == osd_file::error::NONE) { std::string fullpath(diff_file.fullpath()); diff_file.close(); //printf("Opening differencing image file: %s\n", fullpath.c_str()); return diff_chd.open(fullpath.c_str(), true, &source); } /* didn't work; try creating it instead */ //printf("Creating differencing image: %s\n", fname.c_str()); diff_file.set_openflags(OPEN_FLAG_READ | OPEN_FLAG_WRITE | OPEN_FLAG_CREATE | OPEN_FLAG_CREATE_PATHS); filerr = diff_file.open(fname.c_str()); if (filerr == osd_file::error::NONE) { std::string fullpath(diff_file.fullpath()); diff_file.close(); /* create the CHD */ //printf("Creating differencing image file: %s\n", fupointllpath.c_str()); chd_codec_type compression[4] = { CHD_CODEC_NONE }; chd_error err = diff_chd.create(fullpath.c_str(), source.logical_bytes(), source.hunk_bytes(), compression, source); if (err != CHDERR_NONE) return err; return diff_chd.clone_all_metadata(source); } return CHDERR_FILE_NOT_FOUND; } image_init_result harddisk_image_device::internal_load_hd() { chd_error err = CHDERR_NONE; m_chd = nullptr; if (m_hard_disk_handle != nullptr) { hard_disk_close(m_hard_disk_handle); m_hard_disk_handle = nullptr; } /* open the CHD file */ if (loaded_through_softlist()) { m_chd = machine().rom_load().get_disk_handle(device().subtag("harddriv").c_str()); } else { err = m_origchd.open(image_core_file(), true); if (err == CHDERR_NONE) { m_chd = &m_origchd; } else if (err == CHDERR_FILE_NOT_WRITEABLE) { err = m_origchd.open(image_core_file(), false); if (err == CHDERR_NONE) { err = open_disk_diff(device().machine().options(), basename_noext(), m_origchd, m_diffchd); if (err == CHDERR_NONE) { m_chd = &m_diffchd; } } } } if (m_chd != nullptr) { /* open the hard disk file */ m_hard_disk_handle = hard_disk_open(m_chd); if (m_hard_disk_handle != nullptr) return image_init_result::PASS; } /* if we had an error, close out the CHD */ m_origchd.close(); m_diffchd.close(); m_chd = nullptr; seterror(IMAGE_ERROR_UNSPECIFIED, chd_file::error_string(err)); return image_init_result::FAIL; } /************************************* * * Get the CHD file (from the src/chd.c core) * after an image has been opened with the hd core * *************************************/ chd_file *harddisk_image_device::get_chd_file() { chd_file *result = nullptr; hard_disk_file *hd_file = get_hard_disk_file(); if (hd_file) result = hard_disk_get_chd(hd_file); return result; }