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a31078bbec
Some folks might think: “you still use RCS”?!? And we will say, hey, at least we switched from SCCS to RCS back in … I think it was around 1994 ... at least we are keeping up! :-) :-) :-) Logs say that SCCS version 18 became RCS version 19 on 1994 March 18. RCS served us well. But now it is time to move on. And so we are switching to git. Calc releases produce a lot of file changes. In the 125 releases of calc since 1996, when I started managing calc releases, there have been 15473 file mods!
100 lines
3.1 KiB
C
100 lines
3.1 KiB
C
/*
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* file - file I/O routines callable by users
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*
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* Copyright (C) 1999-2007,2014 David I. Bell and Landon Curt Noll
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*
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* Primary author: David I. Bell
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*
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* Calc is open software; you can redistribute it and/or modify it under
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* the terms of the version 2.1 of the GNU Lesser General Public License
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* as published by the Free Software Foundation.
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*
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* Calc is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
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* Public License for more details.
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*
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* A copy of version 2.1 of the GNU Lesser General Public License is
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* distributed with calc under the filename COPYING-LGPL. You should have
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* received a copy with calc; if not, write to Free Software Foundation, Inc.
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* Under source code control: 1996/05/24 05:55:58
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* File existed as early as: 1996
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*
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* chongo <was here> /\oo/\ http://www.isthe.com/chongo/
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* Share and enjoy! :-) http://www.isthe.com/chongo/tech/comp/calc/
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*/
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#if !defined(INCLUDE_FILE_H)
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#define INCLUDE_FILE_H
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#if defined(CALC_SRC) /* if we are building from the calc source tree */
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# include "have_fpos.h"
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#else
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# include <calc/have_fpos.h>
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#endif
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/*
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* Definition of opened files.
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*/
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typedef struct {
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FILEID id; /* id to identify this file */
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FILE *fp; /* real file structure for I/O */
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dev_t dev; /* file device */
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ino_t inode; /* file inode */
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char *name; /* file name */
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BOOL reading; /* TRUE if opened for reading */
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BOOL writing; /* TRUE if opened for writing */
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BOOL appending; /* TRUE if also opened for appending */
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BOOL binary; /* TRUE if binary mode - mode ignored/unused */
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char action; /* most recent use for 'r', 'w' or 0 */
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char mode[sizeof("rb+")+1];/* open mode */
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} FILEIO;
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/*
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* fgetpos/fsetpos vs fseek/ftell interface
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*
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* f_seek_set(FILE *stream, FILEPOS *loc)
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* Seek loc bytes from the beginning of the open file, stream.
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*
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* f_tell(FILE *stream, FILEPOS *loc)
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* Set loc to bytes from the beinning of the open file, stream.
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*
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* We assume that if your system does not have fgetpos/fsetpos,
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* then it will have a FILEPOS that is a scalar type (e.g., long).
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* Some obscure systems without fgetpos/fsetpos may not have a simple
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* scalar type. In these cases the f_tell macro below will fail.
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*/
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#if defined(HAVE_FPOS)
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#define f_seek_set(stream, loc) fsetpos((FILE*)(stream), (FILEPOS*)(loc))
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#define f_tell(stream, loc) fgetpos((FILE*)(stream), (FILEPOS*)(loc))
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#else
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#define f_seek_set(stream, loc) \
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fseek((FILE*)(stream), *(FILEPOS*)(loc), SEEK_SET)
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#define f_tell(stream, loc) (*((FILEPOS*)(loc)) = ftell((FILE*)(stream)))
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#endif
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/*
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* external functions
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*/
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E_FUNC FILEIO * findid(FILEID id, int writable);
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E_FUNC int fgetposid(FILEID id, FILEPOS *ptr);
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E_FUNC int fsetposid(FILEID id, FILEPOS *ptr);
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E_FUNC int get_open_siz(FILE *fp, ZVALUE *res);
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E_FUNC char* findfname(FILEID);
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E_FUNC FILE *f_pathopen(char *name, char *mode, char *pathlist,
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char **openpath);
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#endif /* !INCLUDE_FILE_H */
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