From 6a7a7aaa4c7c715577d9649657412f99c06e1a95 Mon Sep 17 00:00:00 2001
From: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
Date: Sun, 9 Feb 2020 14:13:04 +0100
Subject: block processor: merge left overs of block.c/fragment.c into common.c

Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
---
 lib/sqfs/block_processor/common.c | 135 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 135 insertions(+)

(limited to 'lib/sqfs/block_processor/common.c')

diff --git a/lib/sqfs/block_processor/common.c b/lib/sqfs/block_processor/common.c
index 23991ea..fe9773e 100644
--- a/lib/sqfs/block_processor/common.c
+++ b/lib/sqfs/block_processor/common.c
@@ -49,3 +49,138 @@ int sqfs_block_processor_set_hooks(sqfs_block_processor_t *proc, void *user_ptr,
 
 	return sqfs_block_writer_set_hooks(proc->wr, user_ptr, hooks);
 }
+
+int process_completed_block(sqfs_block_processor_t *proc, sqfs_block_t *blk)
+{
+	sqfs_u64 location;
+	sqfs_u32 size;
+	int err;
+
+	size = blk->size;
+	if (!(blk->flags & SQFS_BLK_IS_COMPRESSED))
+		size |= 1 << 24;
+
+	err = sqfs_block_writer_write(proc->wr, blk, &location);
+	if (err)
+		return err;
+
+	if (blk->size != 0) {
+		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->index] = size;
+		}
+	}
+
+	if (blk->flags & SQFS_BLK_LAST_BLOCK)
+		sqfs_inode_set_file_block_start(blk->inode, location);
+
+	return 0;
+}
+
+int block_processor_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;
+}
+
+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;
+
+	err = sqfs_frag_table_find_tail_end(proc->frag_tbl,
+					    frag->checksum, frag->size,
+					    &index, &offset);
+	if (err == 0)
+		goto out_duplicate;
+
+	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;
+	}
+
+	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);
+
+	if (proc->hooks != NULL && proc->hooks->pre_fragment_store != NULL) {
+		proc->hooks->pre_fragment_store(proc->user_ptr, frag);
+	}
+
+	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;
+	return 0;
+fail:
+	free(*blk_out);
+	*blk_out = NULL;
+	return err;
+out_duplicate:
+	sqfs_inode_set_frag_location(frag->inode, index, offset);
+
+	if (proc->hooks != NULL &&
+	    proc->hooks->notify_fragment_discard != NULL) {
+		proc->hooks->notify_fragment_discard(proc->user_ptr, frag);
+	}
+	return 0;
+}
-- 
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