| 1 | /** @file
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| 2 | Implementation of fseek as declared in <stdio.h>.
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| 3 |
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| 4 | Copyright (c) 2010, Intel Corporation. All rights reserved.<BR>
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| 5 | This program and the accompanying materials are licensed and made available
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| 6 | under the terms and conditions of the BSD License that accompanies this
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| 7 | distribution. The full text of the license may be found at
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| 8 | http://opensource.org/licenses/bsd-license.php.
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| 9 |
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| 10 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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| 11 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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| 12 |
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| 13 | Copyright (c) 1990, 1993
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| 14 | The Regents of the University of California. All rights reserved.
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| 15 |
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| 16 | This code is derived from software contributed to The NetBSD Foundation
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| 17 | by David Laight.
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| 18 |
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| 19 | Redistribution and use in source and binary forms, with or without
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| 20 | modification, are permitted provided that the following conditions
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| 21 | are met:
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| 22 | - Redistributions of source code must retain the above copyright
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| 23 | notice, this list of conditions and the following disclaimer.
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| 24 | - Redistributions in binary form must reproduce the above copyright
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| 25 | notice, this list of conditions and the following disclaimer in the
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| 26 | documentation and/or other materials provided with the distribution.
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| 27 | - Neither the name of the University nor the names of its contributors
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| 28 | may be used to endorse or promote products derived from this software
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| 29 | without specific prior written permission.
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| 30 |
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| 31 | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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| 32 | AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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| 33 | IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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| 34 | ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
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| 35 | LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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| 36 | CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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| 37 | SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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| 38 | INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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| 39 | CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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| 40 | ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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| 41 | POSSIBILITY OF SUCH DAMAGE.
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| 42 |
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| 43 | NetBSD: fseek.c,v 1.22 2006/01/26 10:48:18 kleink Exp
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| 44 | **/
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| 45 | #include <LibConfig.h>
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| 46 | #include <sys/EfiCdefs.h>
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| 47 |
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| 48 | #include <sys/types.h>
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| 49 | #include <sys/stat.h>
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| 50 |
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| 51 | #include "namespace.h"
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| 52 | #include <assert.h>
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| 53 | #include <errno.h>
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| 54 | #include <fcntl.h>
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| 55 | #include <stdio.h>
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| 56 | #include <stdlib.h>
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| 57 | #include "reentrant.h"
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| 58 | #include "local.h"
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| 59 |
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| 60 | /*
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| 61 | * Seek the given file to the given offset.
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| 62 | * Zero extend the offset if SEEK_SET to allow access to 4GB files
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| 63 | */
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| 64 | int
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| 65 | fseek(FILE *fp, long l_offset, int whence)
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| 66 | {
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| 67 | off_t offset;
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| 68 |
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| 69 | if (whence == SEEK_SET)
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| 70 | offset = (off_t)((UINT64)l_offset); // Coerce to unsigned to prevent sign extension
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| 71 | else
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| 72 | offset = (off_t)l_offset; // OK for this one to be negative
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| 73 | return fseeko(fp, offset, whence);
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| 74 | }
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