diff options
Diffstat (limited to 'newlib/libc/stdio/fgetwc.c')
| -rw-r--r-- | newlib/libc/stdio/fgetwc.c | 79 |
1 files changed, 70 insertions, 9 deletions
diff --git a/newlib/libc/stdio/fgetwc.c b/newlib/libc/stdio/fgetwc.c index 14c554786..e89404be8 100644 --- a/newlib/libc/stdio/fgetwc.c +++ b/newlib/libc/stdio/fgetwc.c @@ -26,40 +26,72 @@ /* FUNCTION -<<fgetwc>>, <<getwc>>---get a wide character from a file or stream +<<fgetwc>>, <<getwc>>, <<fgetwc_unlocked>>, <<getwc_unlocked>>---get a wide character from a file or stream INDEX fgetwc INDEX + fgetwc_unlocked +INDEX _fgetwc_r INDEX + _fgetwc_unlocked_r +INDEX getwc INDEX + getwc_unlocked +INDEX _getwc_r +INDEX + _getwc_unlocked_r ANSI_SYNOPSIS #include <stdio.h> #include <wchar.h> wint_t fgetwc(FILE *<[fp]>); + #define _GNU_SOURCE + #include <stdio.h> + #include <wchar.h> + wint_t fgetwc_unlocked(FILE *<[fp]>); + #include <stdio.h> #include <wchar.h> wint_t _fgetwc_r(struct _reent *<[ptr]>, FILE *<[fp]>); #include <stdio.h> #include <wchar.h> + wint_t _fgetwc_unlocked_r(struct _reent *<[ptr]>, FILE *<[fp]>); + + #include <stdio.h> + #include <wchar.h> wint_t getwc(FILE *<[fp]>); + #define _GNU_SOURCE + #include <stdio.h> + #include <wchar.h> + wint_t getwc_unlocked(FILE *<[fp]>); + #include <stdio.h> #include <wchar.h> wint_t _getwc_r(struct _reent *<[ptr]>, FILE *<[fp]>); + #include <stdio.h> + #include <wchar.h> + wint_t _getwc_unlocked_r(struct _reent *<[ptr]>, FILE *<[fp]>); + TRAD_SYNOPSIS #include <stdio.h> #include <wchar.h> wint_t fgetwc(<[fp]>) FILE *<[fp]>; + #define _GNU_SOURCE + #include <stdio.h> + #include <wchar.h> + wint_t fgetwc_unlocked(<[fp]>) + FILE *<[fp]>; + #include <stdio.h> #include <wchar.h> wint_t _fgetwc_r(<[ptr]>, <[fp]>) @@ -68,27 +100,54 @@ TRAD_SYNOPSIS #include <stdio.h> #include <wchar.h> + wint_t _fgetwc_unlocked_r(<[ptr]>, <[fp]>) + struct _reent *<[ptr]>; + FILE *<[fp]>; + + #include <stdio.h> + #include <wchar.h> wint_t getwc(<[fp]>) FILE *<[fp]>; + #define _GNU_SOURCE + #include <stdio.h> + #include <wchar.h> + wint_t getwc_unlocked(<[fp]>) + FILE *<[fp]>; + #include <stdio.h> #include <wchar.h> wint_t _getwc_r(<[ptr]>, <[fp]>) struct _reent *<[ptr]>; FILE *<[fp]>; + #include <stdio.h> + #include <wchar.h> + wint_t _getwc_unlocked_r(<[ptr]>, <[fp]>) + struct _reent *<[ptr]>; + FILE *<[fp]>; + DESCRIPTION Use <<fgetwc>> to get the next wide character from the file or stream identified by <[fp]>. As a side effect, <<fgetwc>> advances the file's current position indicator. -The <<getwc>> function or macro functions identically to <<fgetwc>>. It -may be implemented as a macro, and may evaluate its argument more than -once. There is no reason ever to use it. +<<fgetwc_unlocked>> is a non-thread-safe version of <<fgetwc>>. +<<fgetwc_unlocked>> may only safely be used within a scope +protected by flockfile() (or ftrylockfile()) and funlockfile(). This +function may safely be used in a multi-threaded program if and only +if they are called while the invoking thread owns the (FILE *) +object, as is the case after a successful call to the flockfile() or +ftrylockfile() functions. If threads are disabled, then +<<fgetwc_unlocked>> is equivalent to <<fgetwc>>. + +The <<getwc>> and <<getwc_unlocked>> functions or macros functions identically +to <<fgetwc>> and <<fgetwc_unlocked>>. It may be implemented as a macro, and +may evaluate its argument more than once. There is no reason ever to use it. -<<_fgetwc_r>> and <<_getwc_r>> are simply reentrant versions of -<<fgetwc>> and <<getwc>> that are passed the additional reentrant -structure pointer argument: <[ptr]>. +<<_fgetwc_r>>, <<_getwc_r>>, <<_fgetwc_unlocked_r>>, and <<_getwc_unlocked_r>> +are simply reentrant versions of the above functions that are passed the +additional reentrant structure pointer argument: <[ptr]>. RETURNS The next wide character cast to <<wint_t>>), unless there is no more data, @@ -99,7 +158,9 @@ You can distinguish the two situations that cause an <<EOF>> result by using the <<ferror>> and <<feof>> functions. PORTABILITY -C99, POSIX.1-2001 +<<fgetwc>> and <<getwc>> are required by C99 and POSIX.1-2001. + +<<fgetwc_unlocked>> and <<getwc_unlocked>> are GNU extensions. */ #include <_ansi.h> @@ -110,7 +171,7 @@ C99, POSIX.1-2001 #include <wchar.h> #include "local.h" -static wint_t +wint_t _DEFUN(__fgetwc, (ptr, fp), struct _reent *ptr _AND register FILE *fp) |