/* <vms/lib/fh1def.h>
 *
 *	F11DEF - file header structure, ODS level 1	[not in Starlet]
 */
#ifndef _FH1DEF_H
#define _FH1DEF_H

#define FH1$C_LEVEL1	257	/* 401 octal = structure level 1 */
#define FH1$K_LENGTH	46	/* length of header area */
#define FH1$C_LENGTH	46
#define FH1$S_FH1DEF	512
#define FH1$S_FID	4	/* size (in bytes) of file ID */
#define FH1$S_SYSPRO	4	/* size (in bits) of protection fields */
#define FH1$S_OWNPRO	4
#define FH1$S_GROUPPRO	4
#define FH1$S_WORLDPRO	4
#define FH1$S_RECATTR	32
struct fh1def {
    unsigned char fh1$b_idoffset;	/* ident area offset in words */
    unsigned char fh1$b_mpoffset;	/* map area offset in words */
    union {
	unsigned short fh1$w_fid[2];		/* file ID */
	struct {
	    unsigned short fh1$w_fid_num;	/* file number */
	    unsigned short fh1$w_fid_seq;	/* file sequence number */
	} fh1$r_fid_fields;
    } fh1$r_fid_overlay;
    unsigned short fh1$w_struclev;	/* file structure level */
    union {
	unsigned short fh1$w_fileowner;		/* file owner UIC */
	struct {
	    unsigned char fh1$b_uicmember;	/* UIC member number */
	    unsigned char fh1$b_uicgroup;	/* UIC group number */
	} fh1$r_fileowner_fields;
    } fh1$r_fileowner_overlay;
    union {
	unsigned short fh1$w_fileprot;		/* file protection */
	struct {
	    unsigned fh1$v_syspro   : 4;	/* system protection */
	    unsigned fh1$v_ownpro   : 4;	/* owner protection */
	    unsigned fh1$v_grouppro : 4;	/* group protection */
	    unsigned fh1$v_worldpro : 4;	/* world protection */
	} fh1$r_fileprot_bits;
    } fh1$r_fileprot_overlay;
    union {
	unsigned short fh1$w_filechar;		/* file characteristics */
	struct {
	    union {
		unsigned char fh1$b_userchar;	/* user controlled characteristics */
		struct {
		    unsigned fh1$v_wascontig : 1; /* file was (and should be) contiguous */
		    unsigned fh1$v_nobackup  : 1; /* file is not to be backed up */
		    unsigned		     : 1; /* reserved */
		    unsigned fh1$v_readcheck : 1; /* verify all read operations */
		    unsigned fh1$v_writcheck : 1; /* verify all write operations */
		    unsigned fh1$v_contigb   : 1; /* keep file as contiguous as possible */
		    unsigned fh1$v_locked    : 1; /* file is deaccess locked */
		    unsigned fh1$v_contig    : 1; /* file is contiguous */
		} fh1$r_userchar_bits;
	    } fh1$r_userchar_overlay;
	    union {
		unsigned char fh1$b_syschar;	/* system controlled characteristics */
		struct {
		    unsigned		     : 4; /* reserved */
		    unsigned fh1$v_spool     : 1; /* intermediate spool file */
		    unsigned		     : 1; /* reserved */
		    unsigned fh1$v_badblock  : 1; /* file contains bad blocks */
		    unsigned fh1$v_markdel   : 1; /* file is marked for delete */
		} fh1$r_syschar_bits;
	    } fh1$r_syschar_overlay;
	} fh1$r_filechar_fields;
    } fh1$r_filechar_overlay;
    unsigned short fh1$w_recattr[16];	/* file record attributes */
    unsigned short fh1def$$w_fill[232]; /* rest of file header */
    unsigned short fh1$w_checksum;	/* file header checksum */
};

#endif	/*_FH1DEF_H*/