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-rw-r--r--reftable/blocksource.h27
1 files changed, 26 insertions, 1 deletions
diff --git a/reftable/blocksource.h b/reftable/blocksource.h
index 7b67898ae2..639b9a1a3c 100644
--- a/reftable/blocksource.h
+++ b/reftable/blocksource.h
@@ -12,9 +12,34 @@
#include "system.h"
struct reftable_block_source;
+struct reftable_block;
struct reftable_buf;
-/* Create an in-memory block source for reading reftables */
+/*
+ * Close the block source and the underlying resource. This is a no-op in case
+ * the block source is zero-initialized.
+ */
+void block_source_close(struct reftable_block_source *source);
+
+/*
+ * Read a block of length `size` from the source at the given `off`.
+ */
+ssize_t block_source_read_block(struct reftable_block_source *source,
+ struct reftable_block *dest, uint64_t off,
+ uint32_t size);
+
+/*
+ * Return the total length of the underlying resource.
+ */
+uint64_t block_source_size(struct reftable_block_source *source);
+
+/*
+ * Return a block to its original source, releasing any resources associated
+ * with it.
+ */
+void block_source_return_block(struct reftable_block *block);
+
+/* Create an in-memory block source for reading reftables. */
void block_source_from_buf(struct reftable_block_source *bs,
struct reftable_buf *buf);