[Feature][ZXW-33]merge ZXW 0428 version
Change-Id: I11f167edfea428d9fab198ff00ff1364932d1b0b
diff --git a/ap/libc/glibc/glibc-2.23/libio/fmemopen.c b/ap/libc/glibc/glibc-2.23/libio/fmemopen.c
new file mode 100644
index 0000000..23b5c5f
--- /dev/null
+++ b/ap/libc/glibc/glibc-2.23/libio/fmemopen.c
@@ -0,0 +1,225 @@
+/* fmemopen implementation.
+ Copyright (C) 2015-2016 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/>. */
+
+/* fmemopen() from 2.22 and forward works as defined by POSIX. It also
+ provides an older symbol, version 2.2.5, that behaves different regarding
+ SEEK_END (libio/oldfmemopen.c). */
+
+
+#include <errno.h>
+#include <libio.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <string.h>
+#include <sys/types.h>
+#include "libioP.h"
+
+
+typedef struct fmemopen_cookie_struct fmemopen_cookie_t;
+struct fmemopen_cookie_struct
+{
+ char *buffer; /* memory buffer. */
+ int mybuffer; /* allocated my buffer? */
+ int append; /* buffer open for append? */
+ size_t size; /* buffer length in bytes. */
+ _IO_off64_t pos; /* current position at the buffer. */
+ size_t maxpos; /* max position in buffer. */
+};
+
+
+static ssize_t
+fmemopen_read (void *cookie, char *b, size_t s)
+{
+ fmemopen_cookie_t *c = (fmemopen_cookie_t *) cookie;
+
+ if (c->pos + s > c->maxpos)
+ {
+ if ((size_t) c->pos == c->maxpos)
+ return 0;
+ s = c->size - c->pos;
+ }
+
+ memcpy (b, &(c->buffer[c->pos]), s);
+
+ c->pos += s;
+ if ((size_t) c->pos > c->maxpos)
+ c->maxpos = c->pos;
+
+ return s;
+}
+
+
+static ssize_t
+fmemopen_write (void *cookie, const char *b, size_t s)
+{
+ fmemopen_cookie_t *c = (fmemopen_cookie_t *) cookie;;
+ _IO_off64_t pos = c->append ? c->maxpos : c->pos;
+ int addnullc;
+
+ addnullc = (s == 0 || b[s - 1] != '\0');
+
+ if (pos + s + addnullc > c->size)
+ {
+ if ((size_t) (c->pos + addnullc) >= c->size)
+ {
+ __set_errno (ENOSPC);
+ return 0;
+ }
+ s = c->size - pos - addnullc;
+ }
+
+ memcpy (&(c->buffer[pos]), b, s);
+
+ pos += s;
+ if ((size_t) pos > c->maxpos)
+ {
+ c->maxpos = pos;
+ if (addnullc)
+ c->buffer[c->maxpos] = '\0';
+ }
+
+ return s;
+}
+
+
+static int
+fmemopen_seek (void *cookie, _IO_off64_t *p, int w)
+{
+ _IO_off64_t np;
+ fmemopen_cookie_t *c = (fmemopen_cookie_t *) cookie;
+
+ switch (w)
+ {
+ case SEEK_SET:
+ np = *p;
+ break;
+
+ case SEEK_CUR:
+ np = c->pos + *p;
+ break;
+
+ case SEEK_END:
+ np = c->maxpos + *p;
+ break;
+
+ default:
+ return -1;
+ }
+
+ if (np < 0 || (size_t) np > c->size)
+ return -1;
+
+ *p = c->pos = np;
+
+ return 0;
+}
+
+
+static int
+fmemopen_close (void *cookie)
+{
+ fmemopen_cookie_t *c = (fmemopen_cookie_t *) cookie;
+
+ if (c->mybuffer)
+ free (c->buffer);
+ free (c);
+
+ return 0;
+}
+
+
+FILE *
+__fmemopen (void *buf, size_t len, const char *mode)
+{
+ cookie_io_functions_t iof;
+ fmemopen_cookie_t *c;
+ FILE *result;
+
+ c = (fmemopen_cookie_t *) calloc (sizeof (fmemopen_cookie_t), 1);
+ if (c == NULL)
+ return NULL;
+
+ c->mybuffer = (buf == NULL);
+
+ if (c->mybuffer)
+ {
+ c->buffer = (char *) malloc (len);
+ if (c->buffer == NULL)
+ {
+ free (c);
+ return NULL;
+ }
+ c->buffer[0] = '\0';
+ }
+ else
+ {
+ if (__glibc_unlikely ((uintptr_t) len > -(uintptr_t) buf))
+ {
+ free (c);
+ __set_errno (EINVAL);
+ return NULL;
+ }
+
+ c->buffer = buf;
+
+ /* POSIX states that w+ mode should truncate the buffer. */
+ if (mode[0] == 'w' && mode[1] == '+')
+ c->buffer[0] = '\0';
+
+ if (mode[0] == 'a')
+ c->maxpos = strnlen (c->buffer, len);
+ }
+
+
+ /* Mode | starting position (cookie::pos) | size (cookie::size)
+ ------ |----------------------------------|-----------------------------
+ read | beginning of the buffer | size argument
+ write | beginning of the buffer | zero
+ append | first null or size buffer + 1 | first null or size argument
+ */
+
+ c->size = len;
+
+ if (mode[0] == 'r')
+ c->maxpos = len;
+
+ c->append = mode[0] == 'a';
+ if (c->append)
+ c->pos = c->maxpos;
+ else
+ c->pos = 0;
+
+ iof.read = fmemopen_read;
+ iof.write = fmemopen_write;
+ iof.seek = fmemopen_seek;
+ iof.close = fmemopen_close;
+
+ result = _IO_fopencookie (c, mode, iof);
+ if (__glibc_unlikely (result == NULL))
+ {
+ if (c->mybuffer)
+ free (c->buffer);
+
+ free (c);
+ }
+
+ return result;
+}
+libc_hidden_def (__fmemopen)
+versioned_symbol (libc, __fmemopen, fmemopen, GLIBC_2_22);