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/*
* This testing program checks the offset of the ext2_filsys structure
*
* Copyright (C) 2007 by Theodore Ts'o.
*
* %Begin-Header%
* This file may be redistributed under the terms of the GNU Library
* General Public License, version 2.
* %End-Header%
*/
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include "ext2fs.h"
struct struct_ext2_filsys fs;
#ifndef offsetof
#define offsetof(type, member) __builtin_offsetof (type, member)
#endif
#define check_field(x) cur_offset = do_field(#x, sizeof(fs.x), \
offsetof(struct struct_ext2_filsys, x), \
cur_offset)
static int do_field(const char *field, size_t size, int offset, int cur_offset)
{
if (offset != cur_offset) {
printf("\t(padding %d bytes?)\n", offset - cur_offset);
}
printf("%8d %-30s %3u\n", offset, field, (unsigned) size);
return offset + size;
}
int main(int argc, char **argv)
{
#if (__GNUC__ >= 4)
int cur_offset = 0;
printf("%8s %-30s %3s\n", "offset", "field", "size");
check_field(magic);
check_field(io);
check_field(flags);
check_field(device_name);
check_field(super);
check_field(blocksize);
check_field(fragsize);
check_field(group_desc_count);
check_field(desc_blocks);
check_field(group_desc);
check_field(inode_blocks_per_group);
check_field(inode_map);
check_field(block_map);
check_field(get_blocks);
check_field(check_directory);
check_field(write_bitmaps);
check_field(read_inode);
check_field(write_inode);
check_field(badblocks);
check_field(dblist);
check_field(stride);
check_field(orig_super);
check_field(image_header);
check_field(umask);
check_field(now);
check_field(cluster_ratio_bits);
check_field(reserved);
check_field(priv_data);
check_field(icache);
check_field(image_io);
check_field(get_alloc_block);
check_field(block_alloc_stats);
check_field(mmp_buf);
check_field(mmp_cmp);
check_field(mmp_fd);
check_field(mmp_last_written);
printf("Ending offset is %d\n\n", cur_offset);
#endif
exit(0);
}
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