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-rw-r--r--lib/sqfs/comp/process_block.c38
1 files changed, 38 insertions, 0 deletions
diff --git a/lib/sqfs/comp/process_block.c b/lib/sqfs/comp/process_block.c
new file mode 100644
index 0000000..0fcbae0
--- /dev/null
+++ b/lib/sqfs/comp/process_block.c
@@ -0,0 +1,38 @@
+/* SPDX-License-Identifier: GPL-3.0-or-later */
+/*
+ * process_block.c
+ *
+ * Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
+ */
+#include "config.h"
+
+#include "block_processor.h"
+#include "util.h"
+
+#include <string.h>
+#include <zlib.h>
+
+int process_block(block_t *block, compressor_t *cmp,
+ uint8_t *scratch, size_t scratch_size)
+{
+ ssize_t ret;
+
+ if (!(block->flags & BLK_DONT_CHECKSUM))
+ block->checksum = crc32(0, block->data, block->size);
+
+ if (!(block->flags & BLK_DONT_COMPRESS)) {
+ ret = cmp->do_block(cmp, block->data, block->size,
+ scratch, scratch_size);
+
+ if (ret < 0)
+ return -1;
+
+ if (ret > 0) {
+ memcpy(block->data, scratch, ret);
+ block->size = ret;
+ block->flags |= BLK_IS_COMPRESSED;
+ }
+ }
+
+ return 0;
+}