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/* SPDX-License-Identifier: LGPL-3.0-or-later */
/*
* deduplicate.c
*
* Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
*/
#define SQFS_BUILDING_DLL
#include "internal.h"
int store_block_location(sqfs_block_processor_t *proc, uint64_t offset,
uint32_t size, uint32_t chksum)
{
size_t new_sz;
void *new;
if (proc->num_blocks == proc->max_blocks) {
new_sz = proc->max_blocks * 2;
new = realloc(proc->blocks, sizeof(proc->blocks[0]) * new_sz);
if (new == NULL)
return SQFS_ERROR_ALLOC;
proc->blocks = new;
proc->max_blocks = new_sz;
}
proc->blocks[proc->num_blocks].offset = offset;
proc->blocks[proc->num_blocks].hash = MK_BLK_HASH(chksum, size);
proc->num_blocks += 1;
return 0;
}
size_t deduplicate_blocks(sqfs_block_processor_t *proc, size_t count)
{
size_t i, j;
for (i = 0; i < proc->file_start; ++i) {
for (j = 0; j < count; ++j) {
if (proc->blocks[i + j].hash !=
proc->blocks[proc->file_start + j].hash)
break;
}
if (j == count)
break;
}
return i;
}
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