isovol.h

newos is new operation system

#ifndef ISOVOLDESC_H
#define ISOVOLDESC_H

// Volume Descriptor types
#define ISO_VD_PRIMARY			0x01
#define ISO_VD_SUPPLEMENTARY	0x02
#define ISO_VD_END				0xFF

// Volume Descriptor ID
#define ISO_VD_ID				"CD001"

// Volume Descriptor offset in image
#define ISO_VD_START			0x8000

// Index for LE/BE data
#define ISO_LSB_INDEX			0
#define ISO_MSB_INDEX			1

typedef struct iso_vol_date {
	char			year[4];			// year						(*not* ASCIIZ)
	char			month[2];			// month (1-12)				(*not* ASCIIZ)
	char			day[2];				// day of the month (1-31)	(*not* ASCIIZ)
	char			hour[2];			// hour (00-23)				(*not* ASCIIZ)
	char			minute[2];			// minute (00-59)			(*not* ASCIIZ)
	char			second[2];			// second (00-59)			(*not* ASCIIZ)
	char			hundrSecond[2];		// hundr. of a sec (00-99)	(*not* ASCIIZ)
	signed char		gmtOffset;			// offset from GMT, in 15-minute intervals
} _PACKED iso_vol_date;

typedef struct iso_dir_entry {
	unsigned char	recordLength;		// Total length of this record
	unsigned char	extAttrSecCount;	// Number of sectors in extended attr record
	unsigned long	dataStartSector[2];	// Sector # of 1st data sector for file/dir
	unsigned long	dataLength[2];		// Length of data for file/directory
	unsigned char	year;				// Years since 1900
	unsigned char	month;				// Month (1=jan, etc)
	unsigned char	day;				// Day of the month (1-31)
	unsigned char	hour;				// Hour (0-23)
	unsigned char	minute;				// Minute (0-59)
	unsigned char	second;				// Second (0-59)
	  signed char	gmtOffset;			// GMT offset in 15 minutes intervals
	unsigned char	flags;				// Flags
	unsigned char	unitSize;			// Unit size for interleaved file (0)
	unsigned char	gapSize;			// Gap size for interleaved file (0)
	unsigned short	volSeqNumber[2];	// Volume sequence number
	unsigned char	nameLength;			// Length of name
	char			name[32];			// Name + padding (nameLength [+1])
} _PACKED iso_dir_entry;

typedef struct iso_path_entry {
	unsigned char	nameLength;			// Length of directory name
	unsigned char	extAttrSecCount;	// Number of sectors in extended attr record
	unsigned long	dataStartSector;	// Sector # of 1st data sector for directory
	unsigned short	parentDirRec;		// Record # of parent directory
	unsigned char	name[32];			// Name of this entry (nameLength bytes)
} _PACKED iso_path_entry;

typedef struct iso_volume_descriptor {
	unsigned char	type;				// ISO_VD_PRIMARY / ISO_VD_SUPPLEMENTARY
	char			id[5];				// ISO_VD_ID
	unsigned char	undef1;				// 1
	unsigned char	undef2;				// 0
	unsigned char	systemID[32];		// System Identifier		(*not* ASCIIZ)
	unsigned char	volumeID[32];		// Volume Identifier		(*not* ASCIIZ)
	unsigned char	undef3[8];			// all 0
	unsigned long	numSectors[2];		// Total Number Of Sectors	(little+big endian)
	unsigned char	undef4[32];			// all 0
	unsigned short	volSetSize[2];		// Volume Set Size			(little+big endian)
	unsigned short	volSeqNumber[2];	// Volume Sequence Number	(little+big endian)
	unsigned short	sectorSize[2];		// Sector Size				(little+big endian)
	unsigned long	pathTblSize[2];		// Path Table Size (bytes)	(little+big endian)
	unsigned long	lePathTbl1Sector;	// First sector of LE Path Table
	unsigned long	lePathTbl2Sector;	// First sector of 2nd LE Path Table
	unsigned long	bePathTbl1Sector;	// First sector of BE Path Table
	unsigned long	bePathTbl2Sector;	// First sector of 2nd BE Path Table

	/* Root Directory Entry */
	unsigned char	rootDirEntry[34];	// To use, cast to iso_dir_entry
	
	char			volumeSetID[128];	// Volume Set Identifier	(*not* ASCIIZ)
	char			publisherID[128];	// Publisher Identifier		(*not* ASCIIZ)
	char			dataPreparerID[128];// Data Preparer Identifier	(*not* ASCIIZ)
	char			applicationID[128];	// Application Identifier	(*not* ASCIIZ)
	
	char			copyrightFile[37];	// Copyright File Identifier(*not* ASCIIZ)
	char			abstractFile[37];	// Abstract File Identifier	(*not* ASCIIZ)
	char			bibliogrFile[37];	// Bibliographical File Id.	(*not* ASCIIZ)
	
	iso_vol_date	dateCreation;		// Date and Time of volume creation	
	iso_vol_date	dateModification;	// Date and Time of volume modification	
	iso_vol_date	dateExpires;		// Date and Time that volume expires	
	iso_vol_date	dateEffective;		// Date and Time that volume comes effective
	
	unsigned char	undef5;				// 1
	unsigned char	undef6;				// 0
	unsigned char	forAppUse[512];		// usually zeroes
	unsigned char	undef7[653];		// all 0
} _PACKED iso_volume_descriptor;

#endif