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/* SPDX-License-Identifier: GPL-3.0-or-later */
/*
* skip.c
*
* Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
*/
#include "config.h"
#include "tar.h"
#include <stdio.h>
static int skip_bytes(FILE *fp, sqfs_u64 size)
{
unsigned char buffer[1024];
size_t diff;
while (size != 0) {
diff = sizeof(buffer);
if (diff > size)
diff = size;
if (read_retry("reading tar record padding", fp, buffer, diff))
return -1;
size -= diff;
}
return 0;
}
int skip_padding(FILE *fp, sqfs_u64 size)
{
size_t tail = size % 512;
return tail ? skip_bytes(fp, 512 - tail) : 0;
}
int skip_entry(FILE *fp, sqfs_u64 size)
{
size_t tail = size % 512;
return skip_bytes(fp, tail ? (size + 512 - tail) : size);
}
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