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/* SPDX-License-Identifier: GPL-3.0-or-later */
/*
* data_reader_dump.c
*
* Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
*/
#include "common.h"
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <errno.h>
int sqfs_data_reader_dump(const char *name, sqfs_data_reader_t *data,
const sqfs_inode_generic_t *inode,
sqfs_ostream_t *fp, size_t block_size)
{
size_t i, diff, chunk_size;
sqfs_u64 filesz;
sqfs_u8 *chunk;
int err;
sqfs_inode_get_file_size(inode, &filesz);
for (i = 0; i < sqfs_inode_get_file_block_count(inode); ++i) {
diff = (filesz < block_size) ? filesz : block_size;
if (SQFS_IS_SPARSE_BLOCK(inode->extra[i])) {
err = fp->append(fp, NULL, diff);
} else {
err = sqfs_data_reader_get_block(data, inode, i,
&chunk_size, &chunk);
if (err) {
sqfs_perror(name, "reading data block", err);
return -1;
}
err = fp->append(fp, chunk, chunk_size);
free(chunk);
}
if (err)
goto fail_io;
filesz -= diff;
}
if (filesz > 0) {
err = sqfs_data_reader_get_fragment(data, inode,
&chunk_size, &chunk);
if (err) {
sqfs_perror(name, "reading fragment block", err);
return -1;
}
err = fp->append(fp, chunk, chunk_size);
free(chunk);
if (err)
goto fail_io;
}
return 0;
fail_io:
sqfs_perror(fp->get_filename(fp), "writing data block", err);
return -1;
}
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