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/* SPDX-License-Identifier: LGPL-3.0-or-later */
/*
* common.c
*
* Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
*/
#define SQFS_BUILDING_DLL
#include "internal.h"
int process_completed_block(sqfs_block_processor_t *proc, sqfs_block_t *blk)
{
sqfs_u64 location;
sqfs_u32 size;
int err;
err = sqfs_block_writer_write(proc->wr, blk->size, blk->checksum,
blk->flags, blk->data, &location);
if (err)
return err;
if (blk->flags & SQFS_BLK_IS_SPARSE) {
sqfs_inode_make_extended(blk->inode);
blk->inode->data.file_ext.sparse += blk->size;
blk->inode->extra[blk->inode->num_file_blocks] = 0;
blk->inode->num_file_blocks += 1;
proc->stats.sparse_block_count += 1;
} else if (blk->size != 0) {
size = blk->size;
if (!(blk->flags & SQFS_BLK_IS_COMPRESSED))
size |= 1 << 24;
if (blk->flags & SQFS_BLK_FRAGMENT_BLOCK) {
err = sqfs_frag_table_set(proc->frag_tbl, blk->index,
location, size);
if (err)
return err;
} else {
blk->inode->extra[blk->inode->num_file_blocks] = size;
blk->inode->num_file_blocks += 1;
proc->stats.data_block_count += 1;
}
}
if (blk->flags & SQFS_BLK_LAST_BLOCK)
sqfs_inode_set_file_block_start(blk->inode, location);
return 0;
}
static bool is_zero_block(unsigned char *ptr, size_t size)
{
return ptr[0] == 0 && memcmp(ptr, ptr + 1, size - 1) == 0;
}
int block_processor_do_block(sqfs_block_t *block, sqfs_compressor_t *cmp,
sqfs_u8 *scratch, size_t scratch_size)
{
sqfs_s32 ret;
if (block->size == 0)
return 0;
if (is_zero_block(block->data, block->size)) {
block->flags |= SQFS_BLK_IS_SPARSE;
return 0;
}
block->checksum = xxh32(block->data, block->size);
if (block->flags & (SQFS_BLK_IS_FRAGMENT | SQFS_BLK_DONT_COMPRESS))
return 0;
ret = cmp->do_block(cmp, block->data, block->size,
scratch, scratch_size);
if (ret < 0)
return ret;
if (ret > 0) {
memcpy(block->data, scratch, ret);
block->size = ret;
block->flags |= SQFS_BLK_IS_COMPRESSED;
}
return 0;
}
int process_completed_fragment(sqfs_block_processor_t *proc, sqfs_block_t *frag,
sqfs_block_t **blk_out)
{
sqfs_u32 index, offset;
size_t size;
int err;
if (frag->flags & SQFS_BLK_IS_SPARSE) {
sqfs_inode_make_extended(frag->inode);
frag->inode->data.file_ext.sparse += frag->size;
frag->inode->extra[frag->inode->num_file_blocks] = 0;
frag->inode->num_file_blocks += 1;
proc->stats.sparse_block_count += 1;
return 0;
}
proc->stats.total_frag_count += 1;
err = sqfs_frag_table_find_tail_end(proc->frag_tbl, frag->checksum,
frag->size, &index, &offset);
if (err == 0) {
sqfs_inode_set_frag_location(frag->inode, index, offset);
return 0;
}
if (proc->frag_block != NULL) {
size = proc->frag_block->size + frag->size;
if (size > proc->max_block_size) {
*blk_out = proc->frag_block;
proc->frag_block = NULL;
}
}
if (proc->frag_block == NULL) {
size = sizeof(sqfs_block_t) + proc->max_block_size;
err= sqfs_frag_table_append(proc->frag_tbl, 0, 0, &index);
if (err)
goto fail;
proc->frag_block = calloc(1, size);
if (proc->frag_block == NULL) {
err = SQFS_ERROR_ALLOC;
goto fail;
}
proc->frag_block->index = index;
proc->frag_block->flags = SQFS_BLK_FRAGMENT_BLOCK;
proc->stats.frag_block_count += 1;
}
err = sqfs_frag_table_add_tail_end(proc->frag_tbl,
proc->frag_block->index,
proc->frag_block->size,
frag->size, frag->checksum);
if (err)
goto fail;
sqfs_inode_set_frag_location(frag->inode, proc->frag_block->index,
proc->frag_block->size);
memcpy(proc->frag_block->data + proc->frag_block->size,
frag->data, frag->size);
proc->frag_block->flags |= (frag->flags & SQFS_BLK_DONT_COMPRESS);
proc->frag_block->size += frag->size;
proc->stats.actual_frag_count += 1;
return 0;
fail:
free(*blk_out);
*blk_out = NULL;
return err;
}
const sqfs_block_processor_stats_t
*sqfs_block_processor_get_stats(const sqfs_block_processor_t *proc)
{
return &proc->stats;
}
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