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freebsd-dev/lib/libc/stdio/local.h

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Import CSRG 4.4BSD-Lite2 lib/libc onto vendor branch
1997-03-11 11:29:42 +00:00
/*-
* 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.
* 4. 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
Remove _THREAD_SAFE and make libc thread-safe by default by adding (weak definitions to) stubs for some of the pthread functions. If the threads library is linked in, the real pthread functions will pulled in. Use the following convention for system calls wrapped by the threads library: __sys_foo - actual system call _foo - weak definition to __sys_foo foo - weak definition to __sys_foo Change all libc uses of system calls wrapped by the threads library from foo to _foo. In order to define the prototypes for _foo(), we introduce namespace.h and un-namespace.h (suggested by bde). All files that need to reference these system calls, should include namespace.h before any standard includes, then include un-namespace.h after the standard includes and before any local includes. <db.h> is an exception and shouldn't be included in between namespace.h and un-namespace.h namespace.h will define foo to _foo, and un-namespace.h will undefine foo. Try to eliminate some of the recursive calls to MT-safe functions in libc/stdio in preparation for adding a mutex to FILE. We have recursive mutexes, but would like to avoid using them if possible. Remove uneeded includes of <errno.h> from a few files. Add $FreeBSD$ to a few files in order to pass commitprep. Approved by: -arch
2001-01-24 13:01:12 +00:00
* $FreeBSD$
Import CSRG 4.4BSD-Lite2 lib/libc onto vendor branch
1997-03-11 11:29:42 +00:00
*/
Remove _THREAD_SAFE and make libc thread-safe by default by adding (weak definitions to) stubs for some of the pthread functions. If the threads library is linked in, the real pthread functions will pulled in. Use the following convention for system calls wrapped by the threads library: __sys_foo - actual system call _foo - weak definition to __sys_foo foo - weak definition to __sys_foo Change all libc uses of system calls wrapped by the threads library from foo to _foo. In order to define the prototypes for _foo(), we introduce namespace.h and un-namespace.h (suggested by bde). All files that need to reference these system calls, should include namespace.h before any standard includes, then include un-namespace.h after the standard includes and before any local includes. <db.h> is an exception and shouldn't be included in between namespace.h and un-namespace.h namespace.h will define foo to _foo, and un-namespace.h will undefine foo. Try to eliminate some of the recursive calls to MT-safe functions in libc/stdio in preparation for adding a mutex to FILE. We have recursive mutexes, but would like to avoid using them if possible. Remove uneeded includes of <errno.h> from a few files. Add $FreeBSD$ to a few files in order to pass commitprep. Approved by: -arch
2001-01-24 13:01:12 +00:00
#include <sys/types.h> /* for off_t */
Hide the definition of struct __sFILEX and add the needed lock definitions to it. flockfile state is now allocated along with the rest of FILE. This eliminates the need for a separate allocation of flockfile state as well as eliminating the mutex/lock used to serialize its allocation.
2001-03-01 05:22:14 +00:00
#include <pthread.h>
Basic support for wide character I/O: getwc(), fgetwc(), getwchar(), putwc(), fputwc(), putwchar(), ungetwc(), fwide().
2002-08-13 09:30:41 +00:00
#include <string.h>
#include <wchar.h>
Remove _THREAD_SAFE and make libc thread-safe by default by adding (weak definitions to) stubs for some of the pthread functions. If the threads library is linked in, the real pthread functions will pulled in. Use the following convention for system calls wrapped by the threads library: __sys_foo - actual system call _foo - weak definition to __sys_foo foo - weak definition to __sys_foo Change all libc uses of system calls wrapped by the threads library from foo to _foo. In order to define the prototypes for _foo(), we introduce namespace.h and un-namespace.h (suggested by bde). All files that need to reference these system calls, should include namespace.h before any standard includes, then include un-namespace.h after the standard includes and before any local includes. <db.h> is an exception and shouldn't be included in between namespace.h and un-namespace.h namespace.h will define foo to _foo, and un-namespace.h will undefine foo. Try to eliminate some of the recursive calls to MT-safe functions in libc/stdio in preparation for adding a mutex to FILE. We have recursive mutexes, but would like to avoid using them if possible. Remove uneeded includes of <errno.h> from a few files. Add $FreeBSD$ to a few files in order to pass commitprep. Approved by: -arch
2001-01-24 13:01:12 +00:00
Import CSRG 4.4BSD-Lite2 lib/libc onto vendor branch
1997-03-11 11:29:42 +00:00
/*
* Information local to this implementation of stdio,
* in particular, macros and private variables.
*/
Remove __P() usage.
2002-03-21 22:49:10 +00:00
extern int _sread(FILE *, char *, int);
extern int _swrite(FILE *, char const *, int);
extern fpos_t _sseek(FILE *, fpos_t, int);
extern int _ftello(FILE *, fpos_t *);
extern int _fseeko(FILE *, off_t, int, int);
extern int __fflush(FILE *fp);
Add fcloseall() to libc. This removes the need to export _cleanup(). Linux also provides an fcloseall() implementation. Discussed on: arch
2006-04-22 15:09:15 +00:00
extern void __fcloseall(void);
Introduce unlocked versions of fputwc() and fgetwc() called __fputwc() and __fgetwc() which can be used when we know the file is locked.
2002-09-20 13:20:41 +00:00
extern wint_t __fgetwc(FILE *);
extern wint_t __fputwc(wchar_t, FILE *);
Remove __P() usage.
2002-03-21 22:49:10 +00:00
extern int __sflush(FILE *);
extern FILE *__sfp(void);
Rename slbexpand() to __slbexpand() and make it available outside of fgetln.c (non-static).
2004-07-16 05:52:51 +00:00
extern int __slbexpand(FILE *, size_t);
Remove __P() usage.
2002-03-21 22:49:10 +00:00
extern int __srefill(FILE *);
extern int __sread(void *, char *, int);
extern int __swrite(void *, char const *, int);
extern fpos_t __sseek(void *, fpos_t, int);
extern int __sclose(void *);
extern void __sinit(void);
extern void _cleanup(void);
extern void __smakebuf(FILE *);
extern int __swhatbuf(FILE *, size_t *, int *);
extern int _fwalk(int (*)(FILE *));
Use a weak reference instead of a macro to make vfscanf an alias for __vfscanf.
2002-10-14 11:18:21 +00:00
extern int __svfscanf(FILE *, const char *, __va_list);
Remove __P() usage.
2002-03-21 22:49:10 +00:00
extern int __swsetup(FILE *);
extern int __sflags(const char *, int *);
extern int __ungetc(int, FILE *);
The character argument for __ungetwc() should be wint_t instead of wchar_t.
2002-09-23 11:31:18 +00:00
extern wint_t __ungetwc(wint_t, FILE *);
o Merge <machine/ansi.h> and <machine/types.h> into a new header called <machine/_types.h>. o <machine/ansi.h> will continue to live so it can define MD clock macros, which are only MD because of gratuitous differences between architectures. o Change all headers to make use of this. This mainly involves changing: #ifdef _BSD_FOO_T_ typedef _BSD_FOO_T_ foo_t; #undef _BSD_FOO_T_ #endif to: #ifndef _FOO_T_DECLARED typedef __foo_t foo_t; #define _FOO_T_DECLARED #endif Concept by: bde Reviewed by: jake, obrien
2002-08-21 16:20:02 +00:00
extern int __vfprintf(FILE *, const char *, __va_list);
Use a weak reference instead of a macro to make vfscanf an alias for __vfscanf.
2002-10-14 11:18:21 +00:00
extern int __vfscanf(FILE *, const char *, __va_list);
Add implementations of the wprintf() family of functions, which perform formatted wide-character output.
2002-09-21 13:00:30 +00:00
extern int __vfwprintf(FILE *, const wchar_t *, __va_list);
Add implementations of wscanf() and related functions: fwscanf(), swscanf(), vfwscanf(), vswscanf(), vwscanf(). As the name suggests, these are wide- character versions of the scanf() family of functions.
2002-09-23 12:40:06 +00:00
extern int __vfwscanf(FILE * __restrict, const wchar_t * __restrict,
__va_list);
With current pthread implementations, a mutex initialization will allocate a memory block. sscanf calls __svfscanf which in turn calls fread, fread triggers mutex initialization but the mutex is not destroyed in sscanf, this leads to memory leak. To avoid the memory leak and performance issue, we create a none MT-safe version of fread: __fread, and instead let __svfscanf call __fread. PR: threads/90392 Patch submitted by: dhartmei MFC after: 7 days
2005-12-16 02:50:53 +00:00
extern size_t __fread(void * __restrict buf, size_t size, size_t count,
FILE * __restrict fp);
Import CSRG 4.4BSD-Lite2 lib/libc onto vendor branch
1997-03-11 11:29:42 +00:00
extern int __sdidinit;
Hide the definition of struct __sFILEX and add the needed lock definitions to it. flockfile state is now allocated along with the rest of FILE. This eliminates the need for a separate allocation of flockfile state as well as eliminating the mutex/lock used to serialize its allocation.
2001-03-01 05:22:14 +00:00
/* hold a buncha junk that would grow the ABI */
struct __sFILEX {
unsigned char *_up; /* saved _p when _p is doing ungetc data */
pthread_mutex_t fl_mutex; /* used for MT-safety */
pthread_t fl_owner; /* current owner */
int fl_count; /* recursive lock count */
Basic support for wide character I/O: getwc(), fgetwc(), getwchar(), putwc(), fputwc(), putwchar(), ungetwc(), fwide().
2002-08-13 09:30:41 +00:00
int orientation; /* orientation for fwide() */
Associate a multibyte conversion state object with each stream. Reset it to the initial state when a stream is opened or seeked upon. Use the stream's conversion state object instead of a freshly-zeroed one in fgetwc(), fputwc() and ungetwc(). This is only a performance improvement for now, but it would also be required in order to support state-dependent encodings.
2004-05-22 15:19:41 +00:00
mbstate_t mbstate; /* multibyte conversion state */
Hide the definition of struct __sFILEX and add the needed lock definitions to it. flockfile state is now allocated along with the rest of FILE. This eliminates the need for a separate allocation of flockfile state as well as eliminating the mutex/lock used to serialize its allocation.
2001-03-01 05:22:14 +00:00
};
Import CSRG 4.4BSD-Lite2 lib/libc onto vendor branch
1997-03-11 11:29:42 +00:00
/*
Rename cantwrite() to prepwrite(). The latter is less confusing, since the macro isn't really a predicate, and it has side-effects.
2004-06-08 05:45:32 +00:00
* Prepare the given FILE for writing, and return 0 iff it
* can be written now. Otherwise, return EOF and set errno.
Import CSRG 4.4BSD-Lite2 lib/libc onto vendor branch
1997-03-11 11:29:42 +00:00
*/
Rename cantwrite() to prepwrite(). The latter is less confusing, since the macro isn't really a predicate, and it has side-effects.
2004-06-08 05:45:32 +00:00
#define prepwrite(fp) \
(cantwrite): do not allocate memory for a NULL string PR: misc/26044 MFC after: 1 week Submitted by: bde
2001-06-18 04:44:23 +00:00
((((fp)->_flags & __SWR) == 0 || \
((fp)->_bf._base == NULL && ((fp)->_flags & __SSTR) == 0)) && \
Import CSRG 4.4BSD-Lite2 lib/libc onto vendor branch
1997-03-11 11:29:42 +00:00
__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) ((fp)->_ub._base != NULL)
#define FREEUB(fp) { \
if ((fp)->_ub._base != (fp)->_ubuf) \
free((char *)(fp)->_ub._base); \
(fp)->_ub._base = NULL; \
}
/*
* test for an fgetln() buffer.
*/
#define HASLB(fp) ((fp)->_lb._base != NULL)
#define FREELB(fp) { \
free((char *)(fp)->_lb._base); \
(fp)->_lb._base = NULL; \
}
Properly initialize a temporary FILE that is allocated off the stack. The change to reuse _up from FILE (to allow FILE to grow without changing size) overlooked FILE being allocated off the stack. Approved by: sobomax
2001-06-04 12:36:07 +00:00
#define INITEXTRA(fp) { \
(fp)->_extra->_up = NULL; \
(fp)->_extra->fl_mutex = PTHREAD_MUTEX_INITIALIZER; \
(fp)->_extra->fl_owner = NULL; \
(fp)->_extra->fl_count = 0; \
Basic support for wide character I/O: getwc(), fgetwc(), getwchar(), putwc(), fputwc(), putwchar(), ungetwc(), fwide().
2002-08-13 09:30:41 +00:00
(fp)->_extra->orientation = 0; \
Associate a multibyte conversion state object with each stream. Reset it to the initial state when a stream is opened or seeked upon. Use the stream's conversion state object instead of a freshly-zeroed one in fgetwc(), fputwc() and ungetwc(). This is only a performance improvement for now, but it would also be required in order to support state-dependent encodings.
2004-05-22 15:19:41 +00:00
memset(&(fp)->_extra->mbstate, 0, sizeof(mbstate_t)); \
Properly initialize a temporary FILE that is allocated off the stack. The change to reuse _up from FILE (to allow FILE to grow without changing size) overlooked FILE being allocated off the stack. Approved by: sobomax
2001-06-04 12:36:07 +00:00
}
Basic support for wide character I/O: getwc(), fgetwc(), getwchar(), putwc(), fputwc(), putwchar(), ungetwc(), fwide().
2002-08-13 09:30:41 +00:00
/*
* Set the orientation for a stream. If o > 0, the stream has wide-
* orientation. If o < 0, the stream has byte-orientation.
*/
#define ORIENT(fp, o) do { \
Backout the previous revision due to objections.
2004-03-09 04:51:58 +00:00
if ((fp)->_extra->orientation == 0) \
Basic support for wide character I/O: getwc(), fgetwc(), getwchar(), putwc(), fputwc(), putwchar(), ungetwc(), fwide().
2002-08-13 09:30:41 +00:00
(fp)->_extra->orientation = (o); \
} while (0)
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