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