65efd81290
keep negative offset internally, but return 0 externally in ftell*() I.e. use 0 now as 'unspecified value' per POSIX ungetc() description.
115 lines
4.1 KiB
C
115 lines
4.1 KiB
C
/*-
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* Copyright (c) 1990, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Chris Torek.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)local.h 8.3 (Berkeley) 7/3/94
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*
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* $FreeBSD$
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*/
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#include <sys/types.h> /* for off_t */
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#include <pthread.h>
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/*
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* Information local to this implementation of stdio,
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* in particular, macros and private variables.
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*/
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extern int _ftello __P((FILE *, fpos_t *));
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extern int _fseeko __P((FILE *, off_t, int, int));
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extern int __fflush __P((FILE *fp));
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extern int __sflush __P((FILE *));
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extern FILE *__sfp __P((void));
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extern int __srefill __P((FILE *));
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extern int __sread __P((void *, char *, int));
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extern int __swrite __P((void *, char const *, int));
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extern fpos_t __sseek __P((void *, fpos_t, int));
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extern int __sclose __P((void *));
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extern void __sinit __P((void));
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extern void _cleanup __P((void));
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extern void (*__cleanup) __P((void));
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extern void __smakebuf __P((FILE *));
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extern int __swhatbuf __P((FILE *, size_t *, int *));
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extern int _fwalk __P((int (*)(FILE *)));
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extern int __swsetup __P((FILE *));
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extern int __sflags __P((const char *, int *));
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extern int __ungetc __P((int, FILE *));
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extern int __vfprintf __P((FILE *, const char *, _BSD_VA_LIST_));
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extern int __sdidinit;
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/* hold a buncha junk that would grow the ABI */
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struct __sFILEX {
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unsigned char *_up; /* saved _p when _p is doing ungetc data */
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pthread_mutex_t fl_mutex; /* used for MT-safety */
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pthread_t fl_owner; /* current owner */
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int fl_count; /* recursive lock count */
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};
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/*
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* Return true iff the given FILE cannot be written now.
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*/
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#define cantwrite(fp) \
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((((fp)->_flags & __SWR) == 0 || \
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((fp)->_bf._base == NULL && ((fp)->_flags & __SSTR) == 0)) && \
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__swsetup(fp))
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/*
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* Test whether the given stdio file has an active ungetc buffer;
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* release such a buffer, without restoring ordinary unread data.
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*/
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#define HASUB(fp) ((fp)->_ub._base != NULL)
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#define FREEUB(fp) { \
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if ((fp)->_ub._base != (fp)->_ubuf) \
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free((char *)(fp)->_ub._base); \
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(fp)->_ub._base = NULL; \
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}
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/*
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* test for an fgetln() buffer.
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*/
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#define HASLB(fp) ((fp)->_lb._base != NULL)
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#define FREELB(fp) { \
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free((char *)(fp)->_lb._base); \
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(fp)->_lb._base = NULL; \
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}
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#define INITEXTRA(fp) { \
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(fp)->_extra->_up = NULL; \
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(fp)->_extra->fl_mutex = PTHREAD_MUTEX_INITIALIZER; \
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(fp)->_extra->fl_owner = NULL; \
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(fp)->_extra->fl_count = 0; \
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}
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