minix/lib/libc/stdio/local.h

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/* $NetBSD: local.h,v 1.29 2010/10/24 17:44:32 tron Exp $ */
/*-
* Copyright (c) 1990, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Chris Torek.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)local.h 8.3 (Berkeley) 7/3/94
*/
#include "wcio.h"
#include "fileext.h"
#include <limits.h>
#include <stdbool.h>
/*
* Information local to this implementation of stdio,
* in particular, macros and private variables.
*/
extern int __sflush __P((FILE *));
extern FILE *__sfp __P((void));
extern void __sfpinit __P((FILE *));
extern int __srefill __P((FILE *));
extern int __sread __P((void *, char *, int));
extern int __swrite __P((void *, char const *, int));
extern fpos_t __sseek __P((void *, fpos_t, int));
extern int __sclose __P((void *));
extern void __sinit __P((void));
extern void _cleanup __P((void));
extern void (*__cleanup) __P((void));
extern void __smakebuf __P((FILE *));
extern int __swhatbuf __P((FILE *, size_t *, int *));
extern int _fwalk __P((int (*)(FILE *)));
extern char *_mktemp __P((char *));
extern int __swsetup __P((FILE *));
extern int __sflags __P((const char *, int *));
extern int __svfscanf __P((FILE * __restrict, const char * __restrict,
_BSD_VA_LIST_))
__attribute__((__format__(__scanf__, 2, 0)));
extern int __svfscanf_unlocked __P((FILE * __restrict, const char * __restrict,
_BSD_VA_LIST_))
__attribute__((__format__(__scanf__, 2, 0)));
extern int __vfprintf_unlocked __P((FILE * __restrict, const char * __restrict,
_BSD_VA_LIST_));
extern int __sdidinit;
extern int __gettemp __P((char *, int *, int));
extern wint_t __fgetwc_unlock __P((FILE *));
extern wint_t __fputwc_unlock __P((wchar_t, FILE *));
extern ssize_t __getdelim(char **__restrict, size_t *__restrict, int,
FILE *__restrict);
extern char *__fgetstr __P((FILE * __restrict, size_t * __restrict, int));
extern int __vfwprintf_unlocked __P((FILE *, const wchar_t *,
_BSD_VA_LIST_));
extern int __vfwscanf_unlocked __P((FILE * __restrict,
const wchar_t * __restrict, _BSD_VA_LIST_));
/*
* Return true iff the given FILE cannot be written now.
*/
#define cantwrite(fp) \
((((fp)->_flags & __SWR) == 0 || (fp)->_bf._base == NULL) && \
__swsetup(fp))
/*
* Test whether the given stdio file has an active ungetc buffer;
* release such a buffer, without restoring ordinary unread data.
*/
#define HASUB(fp) (_UB(fp)._base != NULL)
#define FREEUB(fp) { \
if (_UB(fp)._base != (fp)->_ubuf) \
free((char *)_UB(fp)._base); \
_UB(fp)._base = NULL; \
}
/*
* test for an fgetln() buffer.
*/
#define FREELB(fp) { \
free(_EXT(fp)->_fgetstr_buf); \
_EXT(fp)->_fgetstr_buf = NULL; \
_EXT(fp)->_fgetstr_len = 0; \
}
extern void __flockfile_internal __P((FILE *, int));
extern void __funlockfile_internal __P((FILE *, int));
/*
* Detect if the current file position fits in a long int.
*/
static __inline bool
__fpos_overflow(fpos_t pos)
{
return (pos < LONG_MIN) || (pos > LONG_MAX);
}