[Feature][ZXW-33]merge ZXW 0428 version
Change-Id: I11f167edfea428d9fab198ff00ff1364932d1b0b
diff --git a/ap/libc/glibc/glibc-2.23/libio/iosetvbuf.c b/ap/libc/glibc/glibc-2.23/libio/iosetvbuf.c
new file mode 100644
index 0000000..75f937f
--- /dev/null
+++ b/ap/libc/glibc/glibc-2.23/libio/iosetvbuf.c
@@ -0,0 +1,100 @@
+/* Copyright (C) 1993-2016 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C 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
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>.
+
+ As a special exception, if you link the code in this file with
+ files compiled with a GNU compiler to produce an executable,
+ that does not cause the resulting executable to be covered by
+ the GNU Lesser General Public License. This exception does not
+ however invalidate any other reasons why the executable file
+ might be covered by the GNU Lesser General Public License.
+ This exception applies to code released by its copyright holders
+ in files containing the exception. */
+
+#include "libioP.h"
+
+#define _IOFBF 0 /* Fully buffered. */
+#define _IOLBF 1 /* Line buffered. */
+#define _IONBF 2 /* No buffering. */
+
+int
+_IO_setvbuf (_IO_FILE *fp, char *buf, int mode, _IO_size_t size)
+{
+ int result;
+ CHECK_FILE (fp, EOF);
+ _IO_acquire_lock (fp);
+ switch (mode)
+ {
+ case _IOFBF:
+ fp->_IO_file_flags &= ~(_IO_LINE_BUF|_IO_UNBUFFERED);
+ if (buf == NULL)
+ {
+ if (fp->_IO_buf_base == NULL)
+ {
+ /* There is no flag to distinguish between "fully buffered
+ mode has been explicitly set" as opposed to "line
+ buffering has not been explicitly set". In both
+ cases, _IO_LINE_BUF is off. If this is a tty, and
+ _IO_filedoalloc later gets called, it cannot know if
+ it should set the _IO_LINE_BUF flag (because that is
+ the default), or not (because we have explicitly asked
+ for fully buffered mode). So we make sure a buffer
+ gets allocated now, and explicitly turn off line
+ buffering.
+
+ A possibly cleaner alternative would be to add an
+ extra flag, but then flags are a finite resource. */
+ if (_IO_DOALLOCATE (fp) < 0)
+ {
+ result = EOF;
+ goto unlock_return;
+ }
+ fp->_IO_file_flags &= ~_IO_LINE_BUF;
+ }
+ result = 0;
+ goto unlock_return;
+ }
+ break;
+ case _IOLBF:
+ fp->_IO_file_flags &= ~_IO_UNBUFFERED;
+ fp->_IO_file_flags |= _IO_LINE_BUF;
+ if (buf == NULL)
+ {
+ result = 0;
+ goto unlock_return;
+ }
+ break;
+ case _IONBF:
+ fp->_IO_file_flags &= ~_IO_LINE_BUF;
+ fp->_IO_file_flags |= _IO_UNBUFFERED;
+ buf = NULL;
+ size = 0;
+ break;
+ default:
+ result = EOF;
+ goto unlock_return;
+ }
+ result = _IO_SETBUF (fp, buf, size) == NULL ? EOF : 0;
+
+unlock_return:
+ _IO_release_lock (fp);
+ return result;
+}
+libc_hidden_def (_IO_setvbuf)
+
+#ifdef weak_alias
+weak_alias (_IO_setvbuf, setvbuf)
+#endif