filesys.h

来自「ESS3890+SL原代码（1*16内存）」· C头文件 代码 · 共 225 行

/* Copyright 1996, ESS Technology, Inc.                                 */
/* SCCSID @(#)filesys.h	4.13 09/28/04 */

/* based on iso9660.h	3.4 09/26/01 */

/*
 * Header file iso9660.h - assorted structure definitions and typecasts.
 * specific to iso9660 filesystem.

   Written by Eric Youngdale (1993).

   Copyright 1993 Yggdrasil Computing, Incorporated

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2, or (at your option)
   any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */

#ifndef __FILESYS_H__
#define __FILESYS_H__

/*#define LONG_FILENAME_SUPP	/* enable for long file names (Joliet) */

/* some define used by filesys.c, MS, SD */
#define LSB_GET_4BYTES(x) ((*((x)+3)) << 24) | ((*((x)+2)) << 16) | \
                         ((*((x)+1)) << 8) | ((*((x))))
#define LSB_GET_2BYTES(x) ((*((x)+1)) << 8) | ((*((x))))

#define get_bigend32(pcbuf, off) ((uchar)pcbuf[off]|((uchar)pcbuf[off+1] << 8)|\
                        ((uchar)pcbuf[off+2] << 16)|((uchar)pcbuf[off+3] <<24))

#define get_litend32(pcbuf, off) (((uchar)pcbuf[off]<<24)|((uchar)pcbuf[off+1]\
                       <<16) |((uchar)pcbuf[off+2] << 8) | (uchar)pcbuf[off+3])

/*
 * The isofs filesystem constants/structures
 */

/* This part borrowed from the bsd386 isofs */
#define ISODCL(from, to) (to - from + 1)

struct iso_primary_descriptor {
	char type			[ISODCL (  1,   1)]; /* 711 */
	char id				[ISODCL (  2,   6)];
	char version			[ISODCL (  7,   7)]; /* 711 */
	char unused1			[ISODCL (  8,   8)];
	char system_id			[ISODCL (  9,  40)]; /* achars */
	char volume_id			[ISODCL ( 41,  72)]; /* dchars */
	char unused2			[ISODCL ( 73,  80)];
	char volume_space_size		[ISODCL ( 81,  88)]; /* 733 */
	char unused3			[ISODCL ( 89, 120)];
	char volume_set_size		[ISODCL (121, 124)]; /* 723 */
	char volume_sequence_number	[ISODCL (125, 128)]; /* 723 */
	char logical_block_size		[ISODCL (129, 132)]; /* 723 */
	char path_table_size		[ISODCL (133, 140)]; /* 733 */
	char type_l_path_table		[ISODCL (141, 144)]; /* 731 */
	char opt_type_l_path_table	[ISODCL (145, 148)]; /* 731 */
	char type_m_path_table		[ISODCL (149, 152)]; /* 732 */
	char opt_type_m_path_table	[ISODCL (153, 156)]; /* 732 */
	char root_directory_record	[ISODCL (157, 190)]; /* 9.1 */
	char volume_set_id		[ISODCL (191, 318)]; /* dchars */
	char publisher_id		[ISODCL (319, 446)]; /* achars */
	char preparer_id		[ISODCL (447, 574)]; /* achars */
	char application_id		[ISODCL (575, 702)]; /* achars */
	char copyright_file_id		[ISODCL (703, 739)]; /* 7.5 dchars */
	char abstract_file_id		[ISODCL (740, 776)]; /* 7.5 dchars */
	char bibliographic_file_id	[ISODCL (777, 813)]; /* 7.5 dchars */
	char creation_date		[ISODCL (814, 830)]; /* 8.4.26.1 */
	char modification_date		[ISODCL (831, 847)]; /* 8.4.26.1 */
	char expiration_date		[ISODCL (848, 864)]; /* 8.4.26.1 */
	char effective_date		[ISODCL (865, 881)]; /* 8.4.26.1 */
	char file_structure_version	[ISODCL (882, 882)]; /* 711 */
	char unused4			[ISODCL (883, 883)];
	char application_data		[ISODCL (884, 1395)];
	char unused5			[ISODCL (1396, 2048)];
};

struct iso_directory_record {
	uchar length			[ISODCL (1, 1)]; /* 711 */
	uchar ext_attr_length		[ISODCL (2, 2)]; /* 711 */
	uchar extent			[ISODCL (3, 10)]; /* 733 */
	uchar size			[ISODCL (11, 18)]; /* 733 */
	uchar date			[ISODCL (19, 25)]; /* 7 by 711 */
	uchar flags			[ISODCL (26, 26)];
	uchar file_unit_size		[ISODCL (27, 27)]; /* 711 */
	uchar intrleave			[ISODCL (28, 28)]; /* 711 */
	uchar volume_sequence_number	[ISODCL (29, 32)]; /* 723 */
	uchar name_len			[ISODCL (33, 33)]; /* 711 */
	char name			[34]; /* Not really, but we need something here */
};

#ifdef UDF
struct UDF_FileIdentDesc {
    uchar descTag			[ISODCL ( 1, 16)];
    uchar fileVersionNum		[ISODCL (17, 18)]; /* 1 */
    uchar fileCharacteristics		[ISODCL (19, 19)];
    uchar lengthFileIdent		[ISODCL (20, 20)];
    uchar icb_extLength			[ISODCL (21, 24)];
    uchar icb_extLocation_LBN		[ISODCL (25, 28)];
    uchar icb_extLocation_PRN		[ISODCL (29, 30)];
    uchar icb_impUse			[ISODCL (31, 36)];
    uchar lengthOfImpUse		[ISODCL (37, 38)];
    uchar impUse[0];
    char fileIdent[0];
    uchar padding[0];
};
/* "fileCharacteristics" (ECMA 167 4/14.4.3) */
#define FILE_HIDDEN	1
#define FILE_DIRECTORY	2
#define FILE_DELETED	4
#define FILE_PARENT	8
#define FILE_METADATA	0x10 /* UDF 2.0 */
#endif UDF



#if defined(HOST_SLAVE)
#define DIR_REC_NAME_LENGTH 20
#elif defined(LONG_FILENAME_SUPP)
#define DIR_REC_NAME_LENGTH 21
#else
#define DIR_REC_NAME_LENGTH 9
#endif
struct DIR_REC{
    int loc;            /* mmssff */
    int size;           /* in sectors */
#if (defined(JPEG_DEC)||defined(GAMEBOY))
    int bsize;          /* in bytes */
#endif
#ifdef MP3CDG
    int mp3cdg_loc;
    int mp3cdg_size;
#endif
    short dir;
#ifdef HOST_SLAVE
    unsigned char parent_dir;
#endif
    unsigned char name[DIR_REC_NAME_LENGTH+1]; /* "+1" for zero terminator */
};

#ifdef HOST_SLAVE 
struct FILE_REC{
    int loc;            /* mmssff */
    int size;           /* in sectors */
    short dir;
    unsigned char parent_dir;
    unsigned char name[21];
    unsigned int MP3_Packet_End[8];
    unsigned int MP3_Packet_Start[8];
}; 
#endif

typedef struct {
    uchar id;
    char suf[7];
} SUF_ID;

#ifdef LONG_FILENAME_SUPP 
#ifndef SECONDARY_VOL_TABLE 
#define SECONDARY_VOL_TABLE 
#endif
#endif
#define SECONDARY_VOL_TABLE 

#ifdef SECONDARY_VOL_TABLE 
#define MAX_JOLIET_STRING	64*2
#else
#define MAX_JOLIET_STRING	64
#endif

#ifdef AVI_DEC
#define MAX_DIR_CNT		128
#else
#define MAX_DIR_CNT		256
#endif
#define DIR_REC_LEN		sizeof(struct DIR_REC)
#define ISO9660_DIR_SIZE	(DIR_REC_LEN*MAX_DIR_CNT)
#define MAX_FILE_CNT		(4*ISO_size - ISO9660_DIR_SIZE)/DIR_REC_LEN
/* NOTE: MAX_FILE_CNT = 1536, based on ISO_size = 10,752 DW */


#define ISO9660_DIR_OFFSET	(0x02000000 + ISO_start * 4) 
#define ISO9660_FILE_OFFSET	(ISO9660_DIR_OFFSET + ISO9660_DIR_SIZE)
 
GBLDEF0(int ROOT_loc);
GBLDEF0(int ROOT_size);

GBLDEF0(int sec_vol_table);

GBLDEF(volatile int iso9660_dir_cnt, 0);
GBLDEF(int iso9660_file_cnt, 0);
GBLDEF(struct DIR_REC *iso9660_dir, (struct DIR_REC *)ISO9660_DIR_OFFSET);
GBLDEF(struct DIR_REC *iso9660_file, (struct DIR_REC *)ISO9660_FILE_OFFSET);
#ifdef JPEG_DEC
#ifdef JPEG_DGST
GBLDEF0(int jpg_file_cnt);
#endif
GBLDEF0(int is_Kodak_pictureCD);
GBLDEF0(int is_fuji_cd);
#endif JPEG_DEC

#ifdef MULTI_EXT_FILE
GBLDEF0(int cur_file_rec);
#endif

extern uchar real_track[];	/* map to real track number */
extern int real_track_cnt;	/* how many MP3 track we find */

extern int read_filesys(void);
extern int read_iso9660(int);
extern int ISO_multi_ext_end(void);
extern int track_to_rec(int); 

#endif /* __FILESYS_H__ */