70 lines
2.0 KiB
C
70 lines
2.0 KiB
C
/*-
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* Copyright (c) 2016 Kai Wang
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* All rights reserved.
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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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* 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 the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/param.h>
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#include <assert.h>
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#include <errno.h>
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#include <string.h>
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#include <unistd.h>
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#include "_libpe.h"
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ELFTC_VCSID("$Id: libpe_utils.c 3312 2016-01-10 09:23:51Z kaiwang27 $");
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off_t
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libpe_align(PE *pe, off_t off, size_t align)
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{
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off_t n;
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assert(align > 0 && (align & (align - 1)) == 0);
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n = roundup(off, align);
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if (n > off) {
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if (libpe_pad(pe, n - off) < 0)
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return (-1);
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}
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return (n);
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}
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int
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libpe_pad(PE *pe, size_t pad)
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{
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char tmp[128];
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size_t s;
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memset(tmp, 0, sizeof(tmp));
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for (; pad > 0; pad -= s) {
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s = pad > sizeof(tmp) ? sizeof(tmp) : pad;
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if (write(pe->pe_fd, tmp, s) != (ssize_t) s) {
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errno = EIO;
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return (-1);
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}
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}
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return (0);
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}
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