diff options
Diffstat (limited to 'libio/iofgetws_u.c')
-rw-r--r-- | libio/iofgetws_u.c | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/libio/iofgetws_u.c b/libio/iofgetws_u.c new file mode 100644 index 0000000..951ab80 --- /dev/null +++ b/libio/iofgetws_u.c @@ -0,0 +1,59 @@ +/* Copyright (C) 1993, 95, 96, 97, 98, 99 Free Software Foundation, Inc. + This file is part of the GNU IO Library. + + This library is free software; you can redistribute it and/or + modify it under the terms of the GNU General Public License as + published by the Free Software Foundation; either version 2, or (at + your option) any later version. + + This library is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this library; see the file COPYING. If not, write to + the Free Software Foundation, 59 Temple Place - Suite 330, Boston, + MA 02111-1307, USA. + + As a special exception, if you link this library with files + compiled with a GNU compiler to produce an executable, this does + not cause the resulting executable to be covered by the GNU General + Public License. This exception does not however invalidate any + other reasons why the executable file might be covered by the GNU + General Public License. */ + +#include "libioP.h" +#include <wchar.h> + +wchar_t * +fgetws_unlocked (buf, n, fp) + wchar_t *buf; + int n; + _IO_FILE *fp; +{ + _IO_size_t count; + wchar_t *result; + int old_error; + CHECK_FILE (fp, NULL); + if (n <= 0) + return NULL; + /* This is very tricky since a file descriptor may be in the + non-blocking mode. The error flag doesn't mean much in this + case. We return an error only when there is a new error. */ + old_error = fp->_IO_file_flags & _IO_ERR_SEEN; + fp->_IO_file_flags &= ~_IO_ERR_SEEN; + count = _IO_getwline (fp, buf, n - 1, L'\n', 1); + /* If we read in some bytes and errno is EAGAIN, that error will + be reported for next read. */ + if (count == 0 || ((fp->_IO_file_flags & _IO_ERR_SEEN) + && errno != EAGAIN)) + result = NULL; + else + { + buf[count] = '\0'; + result = buf; + } + fp->_IO_file_flags |= old_error; + return result; +} |