150 lines
5.1 KiB
C
150 lines
5.1 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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* $FreeBSD$
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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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#include <string.h>
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#include <wchar.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 _sread(FILE *, char *, int);
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extern int _swrite(FILE *, char const *, int);
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extern fpos_t _sseek(FILE *, fpos_t, int);
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extern int _ftello(FILE *, fpos_t *);
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extern int _fseeko(FILE *, off_t, int, int);
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extern int __fflush(FILE *fp);
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extern wint_t __fgetwc(FILE *);
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extern wint_t __fputwc(wchar_t, FILE *);
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extern int __sflush(FILE *);
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extern FILE *__sfp(void);
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extern int __srefill(FILE *);
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extern int __sread(void *, char *, int);
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extern int __swrite(void *, char const *, int);
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extern fpos_t __sseek(void *, fpos_t, int);
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extern int __sclose(void *);
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extern void __sinit(void);
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extern void _cleanup(void);
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extern void (*__cleanup)(void);
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extern void __smakebuf(FILE *);
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extern int __swhatbuf(FILE *, size_t *, int *);
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extern int _fwalk(int (*)(FILE *));
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extern int __swsetup(FILE *);
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extern int __sflags(const char *, int *);
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extern int __ungetc(int, FILE *);
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extern int __vfprintf(FILE *, const char *, __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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int orientation; /* orientation for fwide() */
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#ifdef notdef
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/*
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* XXX These are not used yet -- they will be used to store the
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* multibyte conversion state for writing and reading when
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* stateful encodings are supported by the locale framework.
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*/
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mbstate_t wstate; /* write conversion state */
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mbstate_t rstate; /* read conversion state */
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#endif
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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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(fp)->_extra->orientation = 0; \
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/* memset(&(fp)->_extra->wstate, 0, sizeof(mbstate_t)); */ \
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/* memset(&(fp)->_extra->rstate, 0, sizeof(mbstate_t)); */ \
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}
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/*
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* Set the orientation for a stream. If o > 0, the stream has wide-
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* orientation. If o < 0, the stream has byte-orientation.
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*/
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#define ORIENT(fp, o) do { \
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if ((fp)->_extra->orientation == 0) \
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(fp)->_extra->orientation = (o); \
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} while (0)
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#ifdef FLOCKFILE
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#define ORIENTLOCK(fp, o) do { \
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FLOCKFILE(fp); \
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ORIENT(fp, o); \
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FUNLOCKFILE(fp); \
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} while (0)
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#endif
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