Adding upstream version 1:2.3.19.1+dfsg1.upstream/1%2.3.19.1+dfsg1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 21 insertions, 0 deletions

diff --git a/src/lib/istream-chain.h b/src/lib/istream-chain.h
new file mode 100644
index 0000000..e5ba68b
--- /dev/null
+++ b/src/lib/istream-chain.h
@@ -0,0 +1,21 @@
+#ifndef ISTREAM_CHAIN_H
+#define ISTREAM_CHAIN_H
+
+struct istream_chain;
+
+/* Flexibly couple input streams into a single chain stream. Input streams can
+   be added after creation of the chain stream, and the chain stream will not
+   signal EOF until all streams are read to EOF and the last stream added was
+   NULL. Streams that were finished to EOF are unreferenced. The chain stream
+   is obviously not seekable and it has no determinable size. The chain_r
+   argument returns a pointer to the chain object. */
+struct istream *i_stream_create_chain(struct istream_chain **chain_r,
+				      size_t max_buffer_size);
+
+/* Append an input stream to the chain. */
+void i_stream_chain_append(struct istream_chain *chain, struct istream *stream);
+/* Mark the end of the chain. Only then reads from the chain stream can
+   return EOF. */
+void i_stream_chain_append_eof(struct istream_chain *chain);
+
+#endif