Add fseek()
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@613 42af7a65-404d-4744-a932-0658087f49c3
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patacongo
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@ -315,7 +315,7 @@
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* Added a test case to verify the Pascal P-Code interpreter
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* Added /dev/zero
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* 'errno' is now defined to be *get_errno_ptr() with no name conflicts
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* Added lseek()
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* Added lseek() and fseek()
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@ -965,7 +965,7 @@ Other memory:
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* Added a test case to verify the Pascal P-Code interpreter
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* Added /dev/zero
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* 'errno' is now defined to be *get_errno_ptr() with no name conflicts
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* Added lseek()
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* Added lseek() and fseek()
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</pre></ul>
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<table width ="100%">
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@ -93,6 +93,7 @@ static ssize_t hello_read(struct file *filp, char *buffer, size_t len)
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nread = hello_pex_len - offset;
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}
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memcpy(buffer, &hello_pex[offset], nread);
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filep->f_pos += nread;
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}
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return nread;
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}
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@ -59,9 +59,10 @@ STDIO_SRCS = lib_printf.c lib_rawprintf.c lib_lowprintf.c lib_dbg.c \
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ifneq ($(CONFIG_NFILE_DESCRIPTORS),0)
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STDIO_SRCS += lib_rawstream.c
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ifneq ($(CONFIG_NFILE_STREAMS),0)
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STDIO_SRCS += lib_fopen.c lib_fclose.c lib_fread.c lib_libfread.c lib_fgetc.c lib_fgets.c \
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lib_gets.c lib_fwrite.c lib_libfwrite.c lib_fflush.c lib_fputc.c lib_puts.c \
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lib_fputs.c lib_ungetc.c lib_vprintf.c lib_fprintf.c lib_vfprintf.c lib_stdstream.c
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STDIO_SRCS += lib_fopen.c lib_fclose.c lib_fread.c lib_libfread.c lib_fseek.c \
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lib_fgetc.c lib_fgets.c lib_gets.c lib_fwrite.c lib_libfwrite.c \
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lib_fflush.c lib_fputc.c lib_puts.c lib_fputs.c lib_ungetc.c \
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lib_vprintf.c lib_fprintf.c lib_vfprintf.c lib_stdstream.c
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endif
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endif
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@ -1,7 +1,7 @@
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/************************************************************
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* lib_fread.c
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/****************************************************************************
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* lib/lib_fread.c
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*
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* Copyright (C) 2007 Gregory Nutt. All rights reserved.
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* Copyright (C) 2007, 2008 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
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*
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* Redistribution and use in source and binary forms, with or without
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@ -14,7 +14,7 @@
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name Gregory Nutt nor the names of its contributors may be
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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@ -31,53 +31,54 @@
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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************************************************************/
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****************************************************************************/
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/************************************************************
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/****************************************************************************
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* Compilation Switches
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************************************************************/
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****************************************************************************/
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/************************************************************
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/****************************************************************************
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* Included Files
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************************************************************/
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****************************************************************************/
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#include <stdio.h>
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#include "lib_internal.h"
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/************************************************************
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/****************************************************************************
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* Definitions
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************************************************************/
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****************************************************************************/
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/************************************************************
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/****************************************************************************
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* Private Type Declarations
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************************************************************/
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****************************************************************************/
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/************************************************************
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/****************************************************************************
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* Private Function Prototypes
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************************************************************/
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****************************************************************************/
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/************************************************************
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/****************************************************************************
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* Global Constant Data
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************************************************************/
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****************************************************************************/
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/************************************************************
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/****************************************************************************
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* Global Variables
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************************************************************/
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****************************************************************************/
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/************************************************************
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/****************************************************************************
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* Private Constant Data
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************************************************************/
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****************************************************************************/
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/************************************************************
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/****************************************************************************
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* Private Variables
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************************************************************/
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/************************************************************
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* Global Functions
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************************************************************/
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****************************************************************************/
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/************************************************************
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* fwrite
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************************************************************/
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/****************************************************************************
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* Global Functions
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****************************************************************************/
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/****************************************************************************
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* Name: fwrite
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****************************************************************************/
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size_t fread(void *ptr, size_t size, size_t n_items, FILE *stream)
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{
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92
lib/lib_fseek.c
Normal file
92
lib/lib_fseek.c
Normal file
@ -0,0 +1,92 @@
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/****************************************************************************
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* lib/lib_fseek.c
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*
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* Copyright (C) 2007, 2008 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Compilation Switches
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <stdio.h>
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#include <unistd.h>
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#include "lib_internal.h"
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/****************************************************************************
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* Definitions
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****************************************************************************/
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/****************************************************************************
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* Private Type Declarations
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****************************************************************************/
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/****************************************************************************
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* Private Function Prototypes
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****************************************************************************/
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/****************************************************************************
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* Global Constant Data
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****************************************************************************/
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/****************************************************************************
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* Global Variables
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****************************************************************************/
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/****************************************************************************
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* Private Constant Data
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****************************************************************************/
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/****************************************************************************
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* Private Variables
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****************************************************************************/
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/****************************************************************************
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* Global Functions
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****************************************************************************/
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/****************************************************************************
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* Name: fseek
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****************************************************************************/
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int fseek(FILE *stream, long int offset, int whence)
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{
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/* Perform the fseek on the underlying file descriptor */
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return lseek(stream->fs_filedes, offset, whence) >= 0 ? OK : ERROR;
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}
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