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Posted to commits@nuttx.apache.org by xi...@apache.org on 2020/06/24 08:56:54 UTC
[incubator-nuttx] branch master updated: rewind: clear the error
indicator
This is an automated email from the ASF dual-hosted git repository.
xiaoxiang pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/incubator-nuttx.git
The following commit(s) were added to refs/heads/master by this push:
new ef5d204 rewind: clear the error indicator
ef5d204 is described below
commit ef5d204fd2df8a544a3cf902085ee5c76346f492
Author: YAMAMOTO Takashi <ya...@midokura.com>
AuthorDate: Wed Jun 24 13:54:30 2020 +0900
rewind: clear the error indicator
Make rewind() clear the error indicator of the stream
as it's specified by the standards.
---
include/stdio.h | 2 +-
libs/libc/stdio/Make.defs | 4 ++--
libs/libc/stdio/lib_rewind.c | 53 ++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 56 insertions(+), 3 deletions(-)
diff --git a/include/stdio.h b/include/stdio.h
index 0b2684b..f5b80a3 100644
--- a/include/stdio.h
+++ b/include/stdio.h
@@ -90,7 +90,6 @@
#define putchar(c) fputc(c, stdout)
#define getc(s) fgetc(s)
#define getchar() fgetc(stdin)
-#define rewind(s) ((void)fseek((s),0,SEEK_SET))
/* Path to the directory where temporary files can be created */
@@ -168,6 +167,7 @@ ssize_t getdelim(FAR char **lineptr, size_t *n, int delimiter,
ssize_t getline(FAR char **lineptr, size_t *n, FAR FILE *stream);
FAR char *gets(FAR char *s);
FAR char *gets_s(FAR char *s, rsize_t n);
+void rewind(FAR FILE *stream);
void setbuf(FAR FILE *stream, FAR char *buf);
int setvbuf(FAR FILE *stream, FAR char *buffer, int mode, size_t size);
int ungetc(int c, FAR FILE *stream);
diff --git a/libs/libc/stdio/Make.defs b/libs/libc/stdio/Make.defs
index 5af1ae7..a1fe27e 100644
--- a/libs/libc/stdio/Make.defs
+++ b/libs/libc/stdio/Make.defs
@@ -59,8 +59,8 @@ CSRCS += lib_fputs.c lib_ungetc.c lib_vprintf.c lib_fprintf.c lib_vfprintf.c
CSRCS += lib_stdinstream.c lib_stdoutstream.c lib_stdsistream.c
CSRCS += lib_stdsostream.c lib_perror.c lib_feof.c lib_ferror.c
CSRCS += lib_rawinstream.c lib_rawoutstream.c lib_rawsistream.c
-CSRCS += lib_rawsostream.c lib_remove.c lib_clearerr.c lib_scanf.c
-CSRCS += lib_vscanf.c lib_fscanf.c lib_vfscanf.c lib_tmpfile.c
+CSRCS += lib_rawsostream.c lib_remove.c lib_rewind.c lib_clearerr.c
+CSRCS += lib_scanf.c lib_vscanf.c lib_fscanf.c lib_vfscanf.c lib_tmpfile.c
endif
diff --git a/libs/libc/stdio/lib_rewind.c b/libs/libc/stdio/lib_rewind.c
new file mode 100644
index 0000000..b590930
--- /dev/null
+++ b/libs/libc/stdio/lib_rewind.c
@@ -0,0 +1,53 @@
+/****************************************************************************
+ * libs/libc/stdio/lib_rewind.c
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership. The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <stdio.h>
+
+#include "libc.h"
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: rewind
+ ****************************************************************************/
+
+void rewind(FAR FILE *stream)
+{
+ /* Verify that we were provided with a stream */
+
+ if (!stream)
+ {
+ set_errno(EBADF);
+ return;
+ }
+
+ lib_take_semaphore(stream);
+ (void) fseek(stream, 0L, SEEK_SET);
+ stream->fs_flags &= ~__FS_FLAG_ERROR;
+ lib_give_semaphore(stream);
+}