1 files changed, 42 insertions, 0 deletions
diff --git a/lib/sqfs/blk_proc/process_block.c b/lib/sqfs/blk_proc/process_block.c
new file mode 100644
index 0000000..3289767
--- /dev/null
+++ b/lib/sqfs/blk_proc/process_block.c
@@ -0,0 +1,42 @@
+/* SPDX-License-Identifier: LGPL-3.0-or-later */
+/*
+ * process_block.c
+ *
+ * Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
+ */
+#define SQFS_BUILDING_DLL
+#include "config.h"
+
+#include "sqfs/block_processor.h"
+#include "sqfs/compress.h"
+#include "util.h"
+
+#include <string.h>
+#include <zlib.h>
+
+int sqfs_block_process(sqfs_block_t *block, sqfs_compressor_t *cmp,
+		       uint8_t *scratch, size_t scratch_size)
+{
+	ssize_t ret;
+
+	if (!(block->flags & SQFS_BLK_DONT_CHECKSUM))
+		block->checksum = crc32(0, block->data, block->size);
+
+	if (!(block->flags & SQFS_BLK_DONT_COMPRESS)) {
+		ret = cmp->do_block(cmp, block->data, block->size,
+				    scratch, scratch_size);
+
+		if (ret < 0) {
+			block->flags |= SQFS_BLK_COMPRESS_ERROR;
+			return ret;
+		}
+
+		if (ret > 0) {
+			memcpy(block->data, scratch, ret);
+			block->size = ret;
+			block->flags |= SQFS_BLK_IS_COMPRESSED;
+		}
+	}
+
+	return 0;
+}