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1993-08-22
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3KB
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109 lines
/* Original code (c) Acorn Computers Ltd, 1992-3 */
/* $Id: h.core 3.1 93/03/09 23:28:35 brian Exp $ */
#ifndef __CORE_H
#define __CORE_H
/*
* General interface routines
*/
_kernel_oserror* Initialise_FileEntrys( void *private_word );
void Terminate_FileEntrys( void );
void ShutDown_FileEntrys( void );
/*
* These are passed to fileswitch
*/
extern char FilingSystemName[];
extern char ModuleName[];
extern int FilingSystemInformationWord;
/*
* A type containing misc info about a file
*/
typedef struct FileDesc
{ Information_Fields info; /* Now Matches GBPB 10/11 format */
int length;
int attr;
int type:8;
int buffered:1;
int interactive:1;
int noosgbpb:1;
} FileDesc;
/*
* opaque type used as handle
*/
typedef struct FileEntry FileEntry;
/*
* Manners of opening
*/
typedef enum which { CREATE, CREATEDIR, OPENIN, OPENUP, OPENDIR } WHICH;
/*
* Directory level
*/
_kernel_oserror *FileEntry_Find( FileEntry *dir, char *name, FileDesc *d );
_kernel_oserror *FileEntry_DirScan( FileEntry *dir, int i, FileDesc *d, char **name );
_kernel_oserror *FileEntry_Delete( FileEntry *dir, char *name, FileDesc *d );
_kernel_oserror *FileEntry_Rename( FileEntry *dir, char *name, FileEntry *newdir, char *newname );
_kernel_oserror *FileEntry_Access( FileEntry *dir, char *name, int attr );
_kernel_oserror *FileEntry_Open( FileEntry *dir, char *name, WHICH which, FileEntry **fe );
_kernel_oserror *FileEntry_Close( FileEntry *fe );
/*
* Data access
*/
/* input o ignored if -1 on unbuffered files (which have a seqptr) */
_kernel_oserror *FileEntry_GetBytes(FileEntry *fe,char *p,int o, int n, int *newpos, int *len);
_kernel_oserror *FileEntry_PutBytes(FileEntry *fe,char *p,int o, int n, int *newpos);
_kernel_oserror *FileEntry_PutZeros( FileEntry *fe, int o, int n );
_kernel_oserror *FileEntry_EnsureSize( FileEntry *fe, int size );
_kernel_oserror *FileEntry_SetLength( FileEntry *fe, int length );
_kernel_oserror *FileEntry_Flush( FileEntry *fe );
_kernel_oserror *FileEntry_SetInfo( FileEntry *fe, Information_Fields info );
/*
* Following simple informative calls are assumed to always succeed -
* information should be kept inside FileEntry
*/
void FileEntry_FileInfoObject( FileEntry *fse );
char *FileEntry_Name( FileEntry *fe );
FileDesc FileEntry_Desc( FileEntry *fe );
int FileEntry_Allocated( FileEntry *fe ); /* does fileswitch really need this? */
char *FileEntry_DiscName( FileEntry *fe );
char *FileEntry_SpecialField( FileEntry *fe );
/*
* UnBuffered files only need provide these - others have no seqptr state
*/
int FileEntry_SeqPtr( FileEntry *fe );
_kernel_oserror *FileEntry_SetSeqPtr( FileEntry *fe, int seqptr );
_kernel_oserror *FileEntry_PutByte( FileEntry *fe , int c );
_kernel_oserror *FileEntry_GetByte( FileEntry *fe, int *c /* EOF */ );
/*
* And an entry for freespace support.
*/
struct freespace { int free, biggest, size; };
_kernel_oserror *FileEntry_FreeSpace( FileEntry *fe, struct freespace *f );
#define Attr_R 1 /* Writeable */
#define Attr_W 2 /* Readable */
#define Attr_L 8 /* Locked */
#define Attr_r 16 /* other readable */
#define Attr_w 32 /* other writeable */
#endif