Add block processor data structure

The interface is designed for parallel, asynchronuous processing of data
blocks with an I/O callback that handles the serialized result.

The underlying implementation is currently still synchronuous.

Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>

1 files changed, 37 insertions, 0 deletions

diff --git a/lib/comp/create_block.c b/lib/comp/create_block.c
new file mode 100644
index 0000000..e410091
--- /dev/null
+++ b/lib/comp/create_block.c
@@ -0,0 +1,37 @@
+/* SPDX-License-Identifier: GPL-3.0-or-later */
+/*
+ * create_block.c
+ *
+ * Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
+ */
+#include "config.h"
+
+#include "block_processor.h"
+#include "util.h"
+
+#include <string.h>
+#include <stdlib.h>
+#include <stdio.h>
+
+block_t *create_block(const char *filename, int fd, size_t size,
+		      void *user, uint32_t flags)
+{
+	block_t *blk = calloc(1, sizeof(*blk) + size);
+
+	if (blk == NULL) {
+		perror(filename);
+		return NULL;
+	}
+
+	if (fd >= 0) {
+		if (read_data(filename, fd, blk->data, size)) {
+			free(blk);
+			return NULL;
+		}
+	}
+
+	blk->size = size;
+	blk->user = user;
+	blk->flags = flags;
+	return blk;
+}