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Diffstat (limited to 'lib/sqfs/data_writer/block.c')
-rw-r--r--lib/sqfs/data_writer/block.c203
1 files changed, 0 insertions, 203 deletions
diff --git a/lib/sqfs/data_writer/block.c b/lib/sqfs/data_writer/block.c
deleted file mode 100644
index b45b1ff..0000000
--- a/lib/sqfs/data_writer/block.c
+++ /dev/null
@@ -1,203 +0,0 @@
-/* SPDX-License-Identifier: LGPL-3.0-or-later */
-/*
- * process_block.c
- *
- * Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
- */
-#define SQFS_BUILDING_DLL
-#include "internal.h"
-
-#include <string.h>
-
-static int store_block_location(sqfs_data_writer_t *proc, sqfs_u64 offset,
- sqfs_u32 size, sqfs_u32 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;
-}
-
-static size_t deduplicate_blocks(sqfs_data_writer_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;
-}
-
-static int align_file(sqfs_data_writer_t *proc, sqfs_block_t *blk)
-{
- sqfs_u32 chksum;
- void *padding;
- sqfs_u64 size;
- size_t diff;
- int ret;
-
- if (!(blk->flags & SQFS_BLK_ALIGN))
- return 0;
-
- size = proc->file->get_size(proc->file);
- diff = size % proc->devblksz;
- if (diff == 0)
- return 0;
-
- padding = calloc(1, diff);
- if (padding == 0)
- return SQFS_ERROR_ALLOC;
-
- if (proc->hooks != NULL && proc->hooks->prepare_padding != NULL)
- proc->hooks->prepare_padding(proc->user_ptr, padding, diff);
-
- chksum = crc32(0, padding, diff);
-
- ret = proc->file->write_at(proc->file, size, padding, diff);
- free(padding);
- if (ret)
- return ret;
-
- return store_block_location(proc, size, diff | (1 << 24), chksum);
-}
-
-int process_completed_block(sqfs_data_writer_t *proc, sqfs_block_t *blk)
-{
- sqfs_u64 offset, bytes;
- size_t start, count;
- sqfs_u32 out;
- int err;
-
- if (proc->hooks != NULL && proc->hooks->pre_block_write != NULL) {
- proc->hooks->pre_block_write(proc->user_ptr, blk, proc->file);
- }
-
- if (blk->flags & SQFS_BLK_FIRST_BLOCK) {
- proc->start = proc->file->get_size(proc->file);
- proc->file_start = proc->num_blocks;
-
- err = align_file(proc, blk);
- if (err)
- return err;
- }
-
- if (blk->size != 0) {
- out = blk->size;
- if (!(blk->flags & SQFS_BLK_IS_COMPRESSED))
- out |= 1 << 24;
-
- offset = proc->file->get_size(proc->file);
-
- if (blk->flags & SQFS_BLK_FRAGMENT_BLOCK) {
- err = sqfs_frag_table_set(proc->frag_tbl, blk->index,
- offset, out);
- if (err)
- return err;
- } else {
- blk->inode->extra[blk->index] = out;
- }
-
- err = store_block_location(proc, offset, out, blk->checksum);
- if (err)
- return err;
-
- err = proc->file->write_at(proc->file, offset,
- blk->data, blk->size);
- if (err)
- return err;
- }
-
- if (proc->hooks != NULL && proc->hooks->post_block_write != NULL) {
- proc->hooks->post_block_write(proc->user_ptr, blk, proc->file);
- }
-
- if (blk->flags & SQFS_BLK_LAST_BLOCK) {
- err = align_file(proc, blk);
- if (err)
- return err;
-
- count = proc->num_blocks - proc->file_start;
- start = deduplicate_blocks(proc, count);
- offset = proc->blocks[start].offset;
-
- sqfs_inode_set_file_block_start(blk->inode, offset);
-
- if (start >= proc->file_start)
- return 0;
-
- offset = start + count;
- if (offset >= proc->file_start) {
- count = proc->num_blocks - offset;
- proc->num_blocks = offset;
- } else {
- proc->num_blocks = proc->file_start;
- }
-
- if (proc->hooks != NULL &&
- proc->hooks->notify_blocks_erased != NULL) {
- bytes = proc->file->get_size(proc->file) - proc->start;
-
- proc->hooks->notify_blocks_erased(proc->user_ptr,
- count, bytes);
- }
-
- err = proc->file->truncate(proc->file, proc->start);
- if (err)
- return err;
- }
-
- return 0;
-}
-
-int data_writer_do_block(sqfs_block_t *block, sqfs_compressor_t *cmp,
- sqfs_u8 *scratch, size_t scratch_size)
-{
- ssize_t ret;
-
- if (block->size == 0) {
- block->checksum = 0;
- return 0;
- }
-
- block->checksum = crc32(0, block->data, block->size);
-
- if (block->flags & SQFS_BLK_IS_FRAGMENT)
- return 0;
-
- if (!(block->flags & SQFS_BLK_DONT_COMPRESS)) {
- 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;
-}