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Speccy ClassiX 1998
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Speccy ClassiX 98.iso
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ixemulsdk.lha
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file.h
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1995-05-17
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/*
* This file is part of ixemul.library for the Amiga.
* Copyright (C) 1991, 1992 Markus M. Wild
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the Free
* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef _SYS_FILE_H
#define _SYS_FILE_H
#include <sys/types.h>
#include <sys/fcntl.h>
#include <sys/unistd.h>
#ifdef _INTERNAL_FILE
#include <sys/stat.h>
#include <libraries/dosextens.h>
/* this is the incore representation of a DTYPE_MEM file */
struct mem_file {
int mf_offset;
void *mf_buffer;
};
/* this `glue' makes a tty a subtype of a plain file. Ie f->f_fh will work
for plain files as well as ttys. */
struct tty_glue {
struct FileHandle *fh;
struct tty *tty; /* internal data of tty.c */
};
/* this will hold basic information about a file, but contrairy to
* Unix, it will also hold its name */
struct file {
char *f_name; /* the name as used with open() */
int f_stb_dirty, /* gets == 1, if changes have been made to 'stb' */
f_type, /* can be a file or some amiga..devices */
f_flags, /* see fcntl.h */
f_count, /* open-count, normally 1, higher after dup() */
(*f_write)(), /* functions to perform write,read,etc on this fd */
(*f_read)(),
(*f_ioctl)(),
(*f_select)(),
(*f_close)();
union {
struct FileHandle *fh; /* this is a CPTR to the allocated
* FileHandle */
struct mem_file mf; /* current data for incore files */
struct socket *so; /* points to socket when DTYPE_SOCKET */
struct tmp_pipe *tp; /* temporary until sockets are here ;-) */
struct tty_glue tg;
} f__fh;
#define f_fh f__fh.fh
#define f_mf f__fh.mf
#define f_so f__fh.so
#define f_tp f__fh.tp
#define f_tty f__fh.tg.tty
/* WARNING: if you change this struct, take care, that f_sp starts at
* long (!) alignment in the struct. The file-table will be allocated
* by AllocMem(), thus by itself it will have DOS-compatible alignment,
* if you don't follow this, you'll get some nice gurus.. */
struct StandardPacket f_sp; /* all IO is done thru the Packet-Interface,
* not the higher-level DOS-functions */
char *f_async_buf;
int f_async_len;
struct stat f_stb; /* file-params at open-time, or after changes to fd */
int f_sync_flags; /* for process synchronization */
};
#define FSFB_LOCKED (0)
#define FSFF_LOCKED (1<<0) /* means the fh is in use */
#define FSFB_WANTLOCK (1)
#define FSFF_WANTLOCK (1<<1) /* means a process is sleeping on fh to get free */
#endif /* _INTERNAL_FILE_H */
#if 0 /* now in <sys/fcntl.h> */
#include <fcntl.h>
/*
* flags - see also fcntl.h
*/
#define FOPEN (-1)
#define FREAD 00001 /* descriptor read/receive'able */
#define FWRITE 00002 /* descriptor write/send'able */
#define FINDIR 00010 /* result of a dup() call */
#define FEXTOPEN 00020 /* someone else opened this fd for
* us, so we shouldn't close it */
#define FTTYRAW 00040 /* did we send a RAW-packet ?? */
#define FUNLINK 00200 /* unlink file after close */
/* bits to save after open */
#define FMASK (FREAD|FWRITE|FAPPEND|FSYNC|FASYNC|FNBIO|FINDIR)
#define FCNTLCANT (FREAD|FWRITE|FINDIR|FEXTOPEN)
#endif
#if 0 /* now in sys/fcntl.h sys/unistd.h */
/*
* Access call.
*/
#define F_OK 0 /* does file exist */
#define X_OK 1 /* is it executable by caller */
#define W_OK 2 /* writable by caller */
#define R_OK 4 /* readable by caller */
/*
* Lseek call.
*/
#define L_SET 0 /* absolute offset */
#define L_INCR 1 /* relative to current offset */
#define L_XTND 2 /* relative to end of file */
#endif
#define DTYPE_FILE 1 /* 'file' is really a file */
#define DTYPE_PIPE 2 /* it's an incore pipe */
#define DTYPE_MEM 3 /* a RDONLY file completely buffered in memory */
#define DTYPE_TASK_FILE 4 /* is a 'file', but used by a task, not a process !*/
#define DTYPE_SOCKET 5 /* socket (inet.library interface) */
#define DTYPE_USOCKET 6 /* socket (own socket code) */
#define DTYPE_TTY 7 /* amigados file, with special access functions */
/* more to follow.. */
#endif /* _SYS_FILE_H */