/* * file - file I/O routines callable by users * * Copyright (C) 1999-2006  David I. Bell and Landon Curt Noll * * Primary author:  David I. Bell * * Calc is open software; you can redistribute it and/or modify it under * the terms of the version 2.1 of the GNU Lesser General Public License * as published by the Free Software Foundation. * * Calc 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 Lesser General * Public License for more details. * * A copy of version 2.1 of the GNU Lesser General Public License is * distributed with calc under the filename COPYING-LGPL.  You should have * received a copy with calc; if not, write to Free Software Foundation, Inc. * 59 Temple Place, Suite 330, Boston, MA  02111-1307, USA. * * @(#) $Revision: 29.8 $ * @(#) $Id: file.h,v 29.8 2006/05/19 15:26:10 chongo Exp $ * @(#) $Source: /usr/local/src/cmd/calc/RCS/file.h,v $ * * Under source code control:	1996/05/24 05:55:58 * File existed as early as:	1996 * * chongo <was here> /\oo/\	http://www.isthe.com/chongo/ * Share and enjoy!  :-)	http://www.isthe.com/chongo/tech/comp/calc/ */#if !defined(__FILE_H__)#define __FILE_H__#if defined(CALC_SRC)	/* if we are building from the calc source tree */# include "have_fpos.h"#else# include <calc/have_fpos.h>#endif/* * Definition of opened files. */typedef struct {	FILEID id;		/* id to identify this file */	FILE *fp;		/* real file structure for I/O */	dev_t dev;		/* file device */	ino_t inode;		/* file inode */	char *name;		/* file name */	BOOL reading;		/* TRUE if opened for reading */	BOOL writing;		/* TRUE if opened for writing */	BOOL appending;		/* TRUE if also opened for appending */	BOOL binary;		/* TRUE if binary mode - mode ignored/unused */	char action;		/* most recent use for 'r', 'w' or 0 */	char mode[sizeof("rb+")+1];/* open mode */} FILEIO;/* * fgetpos/fsetpos vs fseek/ftell interface * * f_seek_set(FILE *stream, FILEPOS *loc) *	Seek loc bytes from the beginning of the open file, stream. * * f_tell(FILE *stream, FILEPOS *loc) *	Set loc to bytes from the beinning of the open file, stream. * * We assume that if your system does not have fgetpos/fsetpos, * then it will have a FILEPOS that is a scalar type (e.g., long). * Some obscure systems without fgetpos/fsetpos may not have a simple * scalar type.	 In these cases the f_tell macro below will fail. */#if defined(HAVE_FPOS)#define f_seek_set(stream, loc) fsetpos((FILE*)(stream), (FILEPOS*)(loc))#define f_tell(stream, loc) fgetpos((FILE*)(stream), (FILEPOS*)(loc))#else#define f_seek_set(stream, loc)	 \	fseek((FILE*)(stream), *(FILEPOS*)(loc), SEEK_SET)#define f_tell(stream, loc) (*((FILEPOS*)(loc)) = ftell((FILE*)(stream)))#endif/* * external functions */extern DLL FILEIO * findid(FILEID id, int writable);extern DLL int fgetposid(FILEID id, FILEPOS *ptr);extern DLL int fsetposid(FILEID id, FILEPOS *ptr);extern DLL int get_open_siz(FILE *fp, ZVALUE *res);extern DLL char* findfname(FILEID);extern DLL FILE *f_pathopen(char *name, char *mode, char *pathlist, char **openpath);#endif /* !__FILE_H__ */