mirror of
https://github.com/holub/mame
synced 2025-06-07 05:13:46 +03:00
ddb290d5f6
Use standard uint64_t, uint32_t, uint16_t or uint8_t instead of UINT64, UINT32, UINT16 or UINT8 also use standard int64_t, int32_t, int16_t or int8_t instead of INT64, INT32, INT16 or INT8
162 lines
4.0 KiB
C++
162 lines
4.0 KiB
C++
// license:BSD-3-Clause
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// copyright-holders:Aaron Giles
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/***************************************************************************
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hardisk.c
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Generic MAME hard disk implementation, with differencing files
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***************************************************************************/
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#include <assert.h>
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#include "harddisk.h"
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#include <stdlib.h>
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/***************************************************************************
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TYPE DEFINITIONS
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***************************************************************************/
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struct hard_disk_file
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{
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chd_file * chd; /* CHD file */
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hard_disk_info info; /* hard disk info */
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};
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/***************************************************************************
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CORE IMPLEMENTATION
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***************************************************************************/
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/*-------------------------------------------------
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hard_disk_open - open a hard disk handle,
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given a chd_file
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-------------------------------------------------*/
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hard_disk_file *hard_disk_open(chd_file *chd)
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{
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int cylinders, heads, sectors, sectorbytes;
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hard_disk_file *file;
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std::string metadata;
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chd_error err;
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/* punt if no CHD */
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if (chd == nullptr)
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return nullptr;
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/* read the hard disk metadata */
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err = chd->read_metadata(HARD_DISK_METADATA_TAG, 0, metadata);
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if (err != CHDERR_NONE)
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return nullptr;
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/* parse the metadata */
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if (sscanf(metadata.c_str(), HARD_DISK_METADATA_FORMAT, &cylinders, &heads, §ors, §orbytes) != 4)
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return nullptr;
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/* allocate memory for the hard disk file */
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file = (hard_disk_file *)malloc(sizeof(hard_disk_file));
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if (file == nullptr)
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return nullptr;
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/* fill in the data */
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file->chd = chd;
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file->info.cylinders = cylinders;
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file->info.heads = heads;
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file->info.sectors = sectors;
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file->info.sectorbytes = sectorbytes;
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return file;
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}
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/*-------------------------------------------------
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hard_disk_close - close a hard disk handle
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-------------------------------------------------*/
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void hard_disk_close(hard_disk_file *file)
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{
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free(file);
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}
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/*-------------------------------------------------
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hard_disk_get_chd - get a handle to a CHD
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from a hard disk
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-------------------------------------------------*/
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chd_file *hard_disk_get_chd(hard_disk_file *file)
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{
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return file->chd;
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}
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/*-------------------------------------------------
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hard_disk_get_info - return information about
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a hard disk
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-------------------------------------------------*/
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/**
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* @fn hard_disk_info *hard_disk_get_info(hard_disk_file *file)
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*
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* @brief Hard disk get information.
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*
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* @param [in,out] file If non-null, the file.
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*
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* @return null if it fails, else a hard_disk_info*.
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*/
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hard_disk_info *hard_disk_get_info(hard_disk_file *file)
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{
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return &file->info;
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}
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/*-------------------------------------------------
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hard_disk_read - read sectors from a hard
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disk
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-------------------------------------------------*/
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/**
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* @fn uint32_t hard_disk_read(hard_disk_file *file, uint32_t lbasector, void *buffer)
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*
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* @brief Hard disk read.
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*
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* @param [in,out] file If non-null, the file.
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* @param lbasector The lbasector.
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* @param [in,out] buffer If non-null, the buffer.
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*
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* @return An uint32_t.
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*/
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uint32_t hard_disk_read(hard_disk_file *file, uint32_t lbasector, void *buffer)
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{
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chd_error err = file->chd->read_units(lbasector, buffer);
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return (err == CHDERR_NONE);
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}
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/*-------------------------------------------------
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hard_disk_write - write sectors to a hard
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disk
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-------------------------------------------------*/
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/**
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* @fn uint32_t hard_disk_write(hard_disk_file *file, uint32_t lbasector, const void *buffer)
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*
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* @brief Hard disk write.
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*
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* @param [in,out] file If non-null, the file.
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* @param lbasector The lbasector.
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* @param buffer The buffer.
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*
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* @return An uint32_t.
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*/
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uint32_t hard_disk_write(hard_disk_file *file, uint32_t lbasector, const void *buffer)
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{
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chd_error err = file->chd->write_units(lbasector, buffer);
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return (err == CHDERR_NONE);
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}
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