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stdio.h: Implement fseeko and ftello function

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specified here:
https://pubs.opengroup.org/onlinepubs/9699919799/functions/fseek.html
https://pubs.opengroup.org/onlinepubs/9699919799/functions/ftell.html

Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>
This commit is contained in:
Xiang Xiao 2020-06-26 14:40:13 +08:00 committed by YAMAMOTO Takashi
parent 095e492cb3
commit 676a2b77f8
4 changed files with 71 additions and 1 deletions
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2
include/stdio.h
View File

@ -158,8 +158,10 @@ FAR FILE *freopen(FAR const char *path, FAR const char *mode,
FAR FILE *stream);
int fscanf(FAR FILE *stream, FAR const IPTR char *fmt, ...);
int fseek(FAR FILE *stream, long int offset, int whence);
int fseeko(FAR FILE *stream, off_t offset, int whence);
int fsetpos(FAR FILE *stream, FAR fpos_t *pos);
long ftell(FAR FILE *stream);
off_t ftello(FAR FILE *stream);
size_t fwrite(FAR const void *ptr, size_t size, size_t n_items,
FAR FILE *stream);
ssize_t getdelim(FAR char **lineptr, size_t *n, int delimiter,

2
libs/libc/stdio/Make.defs
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@ -51,7 +51,7 @@ endif
ifneq ($(CONFIG_NFILE_STREAMS),0)
CSRCS += lib_fopen.c lib_freopen.c lib_fclose.c lib_fread.c lib_libfread.c
CSRCS += lib_fseek.c lib_ftell.c lib_fsetpos.c lib_getdelim.c lib_fgetpos.c
CSRCS += lib_fseek.c lib_fseeko.c lib_ftell.c lib_ftello.c lib_fsetpos.c lib_getdelim.c lib_fgetpos.c
CSRCS += lib_fgetc.c lib_fgets.c lib_gets_s.c lib_gets.c lib_libfgets.c
CSRCS += lib_fwrite.c lib_libfwrite.c lib_fflush.c lib_libflushall.c
CSRCS += lib_libfflush.c lib_rdflush.c lib_wrflush.c lib_fputc.c lib_puts.c

34
libs/libc/stdio/lib_fseeko.c Normal file
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@ -0,0 +1,34 @@
/****************************************************************************
* libs/libc/stdio/lib_fseeko.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 <stdio.h>
/****************************************************************************
* Public Functions
****************************************************************************/
int fseeko(FAR FILE *stream, off_t offset, int whence)
{
return fseek(stream, offset, whence);
}

34
libs/libc/stdio/lib_ftello.c Normal file
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@ -0,0 +1,34 @@
/****************************************************************************
* libs/libc/stdio/lib_ftello.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 <stdio.h>
/****************************************************************************
* Public Functions
****************************************************************************/
off_t ftello(FAR FILE *stream)
{
return ftell(stream);
}