diff options
Diffstat (limited to 'newlib/libc/stdio/fgetws.c')
| -rw-r--r-- | newlib/libc/stdio/fgetws.c | 51 |
1 files changed, 47 insertions, 4 deletions
diff --git a/newlib/libc/stdio/fgetws.c b/newlib/libc/stdio/fgetws.c index dfd7fe9cc..ae1f48e66 100644 --- a/newlib/libc/stdio/fgetws.c +++ b/newlib/libc/stdio/fgetws.c @@ -26,22 +26,35 @@ /* FUNCTION -<<fgetws>>---get wide character string from a file or stream +<<fgetws>>, <<fgetws_unlocked>>---get wide character string from a file or stream INDEX fgetws INDEX + fgetws_unlocked +INDEX _fgetws_r +INDEX + _fgetws_unlocked_r ANSI_SYNOPSIS #include <wchar.h> wchar_t *fgetws(wchar_t *__restrict <[ws]>, int <[n]>, FILE *__restrict <[fp]>); + #define _GNU_SOURCE + #include <wchar.h> + wchar_t *fgetws_unlocked(wchar_t *__restrict <[ws]>, int <[n]>, + FILE *__restrict <[fp]>); + #include <wchar.h> wchar_t *_fgetws_r(struct _reent *<[ptr]>, wchar_t *<[ws]>, int <[n]>, FILE *<[fp]>); + #include <wchar.h> + wchar_t *_fgetws_unlocked_r(struct _reent *<[ptr]>, wchar_t *<[ws]>, + int <[n]>, FILE *<[fp]>); + TRAD_SYNOPSIS #include <wchar.h> wchar_t *fgetws(<[ws]>,<[n]>,<[fp]>) @@ -49,6 +62,13 @@ TRAD_SYNOPSIS int <[n]>; FILE *__restrict <[fp]>; + #define _GNU_SOURCE + #include <wchar.h> + wchar_t *fgetws_unlocked(<[ws]>,<[n]>,<[fp]>) + wchar_t *__restrict <[ws]>; + int <[n]>; + FILE *__restrict <[fp]>; + #include <wchar.h> wchar_t *_fgetws_r(<[ptr]>, <[ws]>,<[n]>,<[fp]>) struct _reent *<[ptr]>; @@ -56,13 +76,29 @@ TRAD_SYNOPSIS int <[n]>; FILE *<[fp]>; + #include <wchar.h> + wchar_t *_fgetws_unlocked_r(<[ptr]>, <[ws]>,<[n]>,<[fp]>) + struct _reent *<[ptr]>; + wchar_t *<[ws]>; + int <[n]>; + FILE *<[fp]>; + DESCRIPTION Reads at most <[n-1]> wide characters from <[fp]> until a newline is found. The wide characters including to the newline are stored in <[ws]>. The buffer is terminated with a 0. -The <<_fgetws_r>> function is simply the reentrant version of -<<fgetws>> and is passed an additional reentrancy structure +<<fgetws_unlocked>> is a non-thread-safe version of <<fgetws>>. +<<fgetws_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 +<<fgetws_unlocked>> is equivalent to <<fgetws>>. + +The <<_fgetws_r>> and <<_fgetws_unlocked_r>> functions are simply reentrant +version of the above and are passed an additional reentrancy structure pointer: <[ptr]>. RETURNS @@ -72,7 +108,9 @@ accumulated, the data is returned with no other indication. If no data are read, NULL is returned instead. PORTABILITY -C99, POSIX.1-2001 +<<fgetws>> is required by C99 and POSIX.1-2001. + +<<fgetws_unlocked>> is a GNU extension. */ #include <_ansi.h> @@ -83,6 +121,11 @@ C99, POSIX.1-2001 #include <wchar.h> #include "local.h" +#ifdef __IMPL_UNLOCKED__ +#define _fgetws_r _fgetws_unlocked_r +#define fgetws fgetws_unlocked +#endif + wchar_t * _DEFUN(_fgetws_r, (ptr, ws, n, fp), struct _reent *ptr _AND |