From patchwork Wed Mar 7 19:31:59 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Zack Weinberg X-Patchwork-Id: 26227 Received: (qmail 58063 invoked by alias); 7 Mar 2018 19:32:11 -0000 Mailing-List: contact libc-alpha-help@sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Unsubscribe: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: libc-alpha-owner@sourceware.org Delivered-To: mailing list libc-alpha@sourceware.org Received: (qmail 57891 invoked by uid 89); 7 Mar 2018 19:32:09 -0000 Authentication-Results: sourceware.org; auth=none X-Virus-Found: No X-Spam-SWARE-Status: No, score=-25.8 required=5.0 tests=AWL, BAYES_00, GIT_PATCH_0, GIT_PATCH_1, GIT_PATCH_2, GIT_PATCH_3, SPF_PASS, T_RP_MATCHES_RCVD autolearn=ham version=3.3.2 spammy=sk:__alway, HContent-Transfer-Encoding:8bit X-HELO: mailbackend.panix.com From: Zack Weinberg To: libc-alpha@sourceware.org Subject: [PATCH 3/9] Use SCANF_ISOC99_A instead of _IO_FLAGS2_SCANF_STD. Date: Wed, 7 Mar 2018 14:31:59 -0500 Message-Id: <20180307193205.4751-4-zackw@panix.com> In-Reply-To: <20180307193205.4751-1-zackw@panix.com> References: <20180307193205.4751-1-zackw@panix.com> MIME-Version: 1.0 Change the callers of __vfscanf_internal and __vfwscanf_internal that want C99-compliant behavior to communicate this via the new flags argument, rather than setting bits on the FILE object. This also means these functions do not need to do their own locking. * stdio-common/isoc99_scanf.c * stdio-common/isoc99_fscanf.c * stdio-common/isoc99_sscanf.c * stdio-common/isoc99_vscanf.c * stdio-common/isoc99_vfscanf.c * stdio-common/isoc99_vsscanf.c * wcsmbs/isoc99_wscanf.c * wcsmbs/isoc99_fwscanf.c * wcsmbs/isoc99_swscanf.c * wcsmbs/isoc99_vwscanf.c * wcsmbs/isoc99_vfwscanf.c * wcsmbs/isoc99_vswscanf.c: Pass SCANF_ISOC99_A to __vfscanf_internal and/or __vfwscanf_internal. Do not set _IO_FLAGS2_SCANF_STD on the FILE passed to that function. No need to lock and unlock the FILE passed to that function. * stdio-common/vfscanf-internal.c (__vfscanf_internal, __vfwscanf_internal): Don't look at _IO_FLAGS2_SCANF_STD. * libio/libioP.h (_IO_acquire_lock_clear_flags2_fct) (_IO_release_lock): Don't clear _IO_FLAGS2_SCANF_STD. * libio/libio.h (_IO_FLAGS2_SCANF_STD): Delete. --- libio/libio.h | 1 - libio/libioP.h | 5 ++--- stdio-common/isoc99_fscanf.c | 6 +----- stdio-common/isoc99_scanf.c | 13 ++----------- stdio-common/isoc99_sscanf.c | 3 +-- stdio-common/isoc99_vfscanf.c | 8 +------- stdio-common/isoc99_vscanf.c | 8 +------- stdio-common/isoc99_vsscanf.c | 3 +-- stdio-common/vfscanf-internal.c | 2 -- wcsmbs/isoc99_fwscanf.c | 6 +----- wcsmbs/isoc99_swscanf.c | 3 +-- wcsmbs/isoc99_vfwscanf.c | 8 +------- wcsmbs/isoc99_vswscanf.c | 3 +-- wcsmbs/isoc99_vwscanf.c | 8 +------- wcsmbs/isoc99_wscanf.c | 6 +----- 15 files changed, 15 insertions(+), 68 deletions(-) diff --git a/libio/libio.h b/libio/libio.h index d4eba2df54..30cb7d784f 100644 --- a/libio/libio.h +++ b/libio/libio.h @@ -92,7 +92,6 @@ typedef union #define _IO_FLAGS2_NOTCANCEL 2 #define _IO_FLAGS2_FORTIFY 4 #define _IO_FLAGS2_USER_WBUF 8 -#define _IO_FLAGS2_SCANF_STD 16 #define _IO_FLAGS2_NOCLOSE 32 #define _IO_FLAGS2_CLOEXEC 64 #define _IO_FLAGS2_NEED_LOCK 128 diff --git a/libio/libioP.h b/libio/libioP.h index a471c90be8..0772fb1431 100644 --- a/libio/libioP.h +++ b/libio/libioP.h @@ -773,7 +773,7 @@ __attribute__ ((__always_inline__)) _IO_acquire_lock_clear_flags2_fct (FILE **p) { FILE *fp = *p; - fp->_flags2 &= ~(_IO_FLAGS2_FORTIFY | _IO_FLAGS2_SCANF_STD); + fp->_flags2 &= ~(_IO_FLAGS2_FORTIFY); if ((fp->_flags & _IO_USER_LOCK) == 0) _IO_funlockfile (fp); } @@ -787,8 +787,7 @@ _IO_acquire_lock_clear_flags2_fct (FILE **p) FILE *_IO_acquire_lock_file = (_fp) # define _IO_release_lock(_fp) \ if (_IO_acquire_lock_file != NULL) \ - _IO_acquire_lock_file->_flags2 &= ~(_IO_FLAGS2_FORTIFY \ - | _IO_FLAGS2_SCANF_STD); \ + _IO_acquire_lock_file->_flags2 &= ~(_IO_FLAGS2_FORTIFY); \ } while (0) #endif diff --git a/stdio-common/isoc99_fscanf.c b/stdio-common/isoc99_fscanf.c index 4210d11f2b..e788ac47bb 100644 --- a/stdio-common/isoc99_fscanf.c +++ b/stdio-common/isoc99_fscanf.c @@ -27,13 +27,9 @@ __isoc99_fscanf (FILE *stream, const char *format, ...) va_list arg; int done; - _IO_acquire_lock_clear_flags2 (stream); - stream->_flags2 |= _IO_FLAGS2_SCANF_STD; - va_start (arg, format); - done = __vfscanf_internal (stream, format, arg, 0); + done = __vfscanf_internal (stream, format, arg, SCANF_ISOC99_A); va_end (arg); - _IO_release_lock (stream); return done; } diff --git a/stdio-common/isoc99_scanf.c b/stdio-common/isoc99_scanf.c index 64c873eed9..98b0a19e89 100644 --- a/stdio-common/isoc99_scanf.c +++ b/stdio-common/isoc99_scanf.c @@ -19,26 +19,17 @@ #include #include - /* Read formatted input from stdin according to the format string FORMAT. */ -/* VARARGS1 */ + int __isoc99_scanf (const char *format, ...) { va_list arg; int done; -#ifdef _IO_MTSAFE_IO - _IO_acquire_lock_clear_flags2 (stdin); -#endif - stdin->_flags2 |= _IO_FLAGS2_SCANF_STD; - va_start (arg, format); - done = __vfscanf_internal (stdin, format, arg, 0); + done = __vfscanf_internal (stdin, format, arg, SCANF_ISOC99_A); va_end (arg); -#ifdef _IO_MTSAFE_IO - _IO_release_lock (stdin); -#endif return done; } diff --git a/stdio-common/isoc99_sscanf.c b/stdio-common/isoc99_sscanf.c index 95b94a68b5..c53130e4ff 100644 --- a/stdio-common/isoc99_sscanf.c +++ b/stdio-common/isoc99_sscanf.c @@ -27,10 +27,9 @@ __isoc99_sscanf (const char *s, const char *format, ...) int done; _IO_strfile sf; FILE *f = _IO_strfile_read (&sf, s); - f->_flags2 |= _IO_FLAGS2_SCANF_STD; va_start (arg, format); - done = __vfscanf_internal (f, format, arg, 0); + done = __vfscanf_internal (f, format, arg, SCANF_ISOC99_A); va_end (arg); return done; diff --git a/stdio-common/isoc99_vfscanf.c b/stdio-common/isoc99_vfscanf.c index c96ca831ae..0bc2ad911e 100644 --- a/stdio-common/isoc99_vfscanf.c +++ b/stdio-common/isoc99_vfscanf.c @@ -23,12 +23,6 @@ int __isoc99_vfscanf (FILE *stream, const char *format, va_list args) { - int done; - - _IO_acquire_lock_clear_flags2 (stream); - stream->_flags2 |= _IO_FLAGS2_SCANF_STD; - done = __vfscanf_internal (stream, format, args, 0); - _IO_release_lock (stream); - return done; + return __vfscanf_internal (stream, format, args, SCANF_ISOC99_A); } libc_hidden_def (__isoc99_vfscanf) diff --git a/stdio-common/isoc99_vscanf.c b/stdio-common/isoc99_vscanf.c index 72ae72ddee..1a270b0e0c 100644 --- a/stdio-common/isoc99_vscanf.c +++ b/stdio-common/isoc99_vscanf.c @@ -23,11 +23,5 @@ int __isoc99_vscanf (const char *format, va_list args) { - int done; - - _IO_acquire_lock_clear_flags2 (stdin); - stdin->_flags2 |= _IO_FLAGS2_SCANF_STD; - done = __vfscanf_internal (stdin, format, args, 0); - _IO_release_lock (stdin); - return done; + return __vfscanf_internal (stdin, format, args, SCANF_ISOC99_A); } diff --git a/stdio-common/isoc99_vsscanf.c b/stdio-common/isoc99_vsscanf.c index 02bc0f50e6..dfc394bb51 100644 --- a/stdio-common/isoc99_vsscanf.c +++ b/stdio-common/isoc99_vsscanf.c @@ -31,7 +31,6 @@ __isoc99_vsscanf (const char *string, const char *format, va_list args) { _IO_strfile sf; FILE *f = _IO_strfile_read (&sf, string); - f->_flags2 |= _IO_FLAGS2_SCANF_STD; - return __vfscanf_internal (f, format, args, 0); + return __vfscanf_internal (f, format, args, SCANF_ISOC99_A); } libc_hidden_def (__isoc99_vsscanf) diff --git a/stdio-common/vfscanf-internal.c b/stdio-common/vfscanf-internal.c index 93b07ad4bc..9f99d237d2 100644 --- a/stdio-common/vfscanf-internal.c +++ b/stdio-common/vfscanf-internal.c @@ -336,8 +336,6 @@ __vfscanf_internal (FILE *s, const char *format, va_list argptr, /* Temporarily honor the environmental mode bits. */ if (__ldbl_is_dbl) mode_flags |= SCANF_LDBL_IS_DBL; - if (s->_flags2 & _IO_FLAGS2_SCANF_STD) - mode_flags |= SCANF_ISOC99_A; #ifdef __va_copy __va_copy (arg, argptr); diff --git a/wcsmbs/isoc99_fwscanf.c b/wcsmbs/isoc99_fwscanf.c index 00b07dd48e..b01826e5ac 100644 --- a/wcsmbs/isoc99_fwscanf.c +++ b/wcsmbs/isoc99_fwscanf.c @@ -28,13 +28,9 @@ __isoc99_fwscanf (FILE *stream, const wchar_t *format, ...) va_list arg; int done; - _IO_acquire_lock_clear_flags2 (stream); - stream->_flags2 |= _IO_FLAGS2_SCANF_STD; - va_start (arg, format); - done = __vfwscanf_internal (stream, format, arg, 0); + done = __vfwscanf_internal (stream, format, arg, SCANF_ISOC99_A); va_end (arg); - _IO_release_lock (stream); return done; } diff --git a/wcsmbs/isoc99_swscanf.c b/wcsmbs/isoc99_swscanf.c index 40401d0aa1..f90e56d97f 100644 --- a/wcsmbs/isoc99_swscanf.c +++ b/wcsmbs/isoc99_swscanf.c @@ -28,10 +28,9 @@ __isoc99_swscanf (const wchar_t *s, const wchar_t *format, ...) _IO_strfile sf; struct _IO_wide_data wd; FILE *f = _IO_strfile_readw (&sf, &wd, s); - f->_flags2 |= _IO_FLAGS2_SCANF_STD; va_start (arg, format); - done = __vfwscanf_internal (f, format, arg, 0); + done = __vfwscanf_internal (f, format, arg, SCANF_ISOC99_A); va_end (arg); return done; diff --git a/wcsmbs/isoc99_vfwscanf.c b/wcsmbs/isoc99_vfwscanf.c index f70c6b596d..f9d0a384f5 100644 --- a/wcsmbs/isoc99_vfwscanf.c +++ b/wcsmbs/isoc99_vfwscanf.c @@ -24,12 +24,6 @@ int __isoc99_vfwscanf (FILE *stream, const wchar_t *format, va_list args) { - int done; - - _IO_acquire_lock_clear_flags2 (stream); - stream->_flags2 |= _IO_FLAGS2_SCANF_STD; - done = __vfwscanf_internal (stream, format, args, 0); - _IO_release_lock (stream); - return done; + return __vfwscanf_internal (stream, format, args, SCANF_ISOC99_A); } libc_hidden_def (__isoc99_vfwscanf) diff --git a/wcsmbs/isoc99_vswscanf.c b/wcsmbs/isoc99_vswscanf.c index b91eb651a3..0d8ef7611a 100644 --- a/wcsmbs/isoc99_vswscanf.c +++ b/wcsmbs/isoc99_vswscanf.c @@ -33,7 +33,6 @@ __isoc99_vswscanf (const wchar_t *string, const wchar_t *format, va_list args) _IO_strfile sf; struct _IO_wide_data wd; FILE *f = _IO_strfile_readw (&sf, &wd, string); - f->_flags2 |= _IO_FLAGS2_SCANF_STD; - return __vfwscanf_internal (f, format, args, 0); + return __vfwscanf_internal (f, format, args, SCANF_ISOC99_A); } libc_hidden_def (__isoc99_vswscanf) diff --git a/wcsmbs/isoc99_vwscanf.c b/wcsmbs/isoc99_vwscanf.c index eb22c8acae..5e4f44d794 100644 --- a/wcsmbs/isoc99_vwscanf.c +++ b/wcsmbs/isoc99_vwscanf.c @@ -24,11 +24,5 @@ int __isoc99_vwscanf (const wchar_t *format, va_list args) { - int done; - - _IO_acquire_lock_clear_flags2 (stdin); - stdin->_flags2 |= _IO_FLAGS2_SCANF_STD; - done = __vfwscanf_internal (stdin, format, args, 0); - _IO_release_lock (stdin); - return done; + return __vfwscanf_internal (stdin, format, args, SCANF_ISOC99_A); } diff --git a/wcsmbs/isoc99_wscanf.c b/wcsmbs/isoc99_wscanf.c index 59f80d78fb..a0f24e1f49 100644 --- a/wcsmbs/isoc99_wscanf.c +++ b/wcsmbs/isoc99_wscanf.c @@ -29,13 +29,9 @@ __isoc99_wscanf (const wchar_t *format, ...) va_list arg; int done; - _IO_acquire_lock_clear_flags2 (stdin); - stdin->_flags2 |= _IO_FLAGS2_SCANF_STD; - va_start (arg, format); - done = __vfwscanf_internal (stdin, format, arg, 0); + done = __vfwscanf_internal (stdin, format, arg, SCANF_ISOC99_A); va_end (arg); - _IO_release_lock (stdin); return done; }