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Diffstat (limited to 'nuttx/lib/stdio/lib_fsetpos.c')
-rw-r--r-- | nuttx/lib/stdio/lib_fsetpos.c | 116 |
1 files changed, 116 insertions, 0 deletions
diff --git a/nuttx/lib/stdio/lib_fsetpos.c b/nuttx/lib/stdio/lib_fsetpos.c new file mode 100644 index 000000000..ad3e67230 --- /dev/null +++ b/nuttx/lib/stdio/lib_fsetpos.c @@ -0,0 +1,116 @@ +/**************************************************************************** + * lib/stdio/lib_fsetpos.c + * + * Copyright (C) 2008, 2011 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/**************************************************************************** + * Compilation Switches + ****************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/config.h> + +#include <sys/types.h> +#include <stdio.h> +#include <unistd.h> +#include <fcntl.h> +#include <errno.h> + +#include "lib_internal.h" + +/**************************************************************************** + * Definitions + ****************************************************************************/ + +/**************************************************************************** + * Private Type Declarations + ****************************************************************************/ + +/**************************************************************************** + * Private Function Prototypes + ****************************************************************************/ + +/**************************************************************************** + * Global Constant Data + ****************************************************************************/ + +/**************************************************************************** + * Global Variables + ****************************************************************************/ + +/**************************************************************************** + * Private Constant Data + ****************************************************************************/ + +/**************************************************************************** + * Private Variables + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: fsetpos + * + * Description: + * fsetpos() function is an alternate interfaces equivalent to fseek() + * (with whence set to SEEK_SET). It sets the current value of the file + * offset to value in the location referenced by pos. On some non-UNIX + * systems an fpos_t object may be a complex object and fsetpos may be the + * only way to portably reposition a stream. + * + * Returned Value: + * Zero on succes; -1 on failure with errno set appropriately. + * + ****************************************************************************/ + +int fsetpos(FAR FILE *stream, FAR fpos_t *pos) +{ +#if CONFIG_DEBUG + if (!stream || !pos) + { + set_errno(EINVAL); + return ERROR; + } +#endif + + return fseek(stream, (FAR off_t)*pos, SEEK_SET); +} |