1 files changed, 62 insertions, 0 deletions
diff --git a/src/lib/istream-data.c b/src/lib/istream-data.c
new file mode 100644
index 0000000..b97fc21
--- /dev/null
+++ b/src/lib/istream-data.c
@@ -0,0 +1,62 @@
+/* Copyright (c) 2002-2018 Dovecot authors, see the included COPYING file */
+
+#include "lib.h"
+#include "istream-private.h"
+
+static ssize_t i_stream_data_read(struct istream_private *stream)
+{
+	stream->istream.eof = TRUE;
+	return -1;
+}
+
+static void i_stream_data_seek(struct istream_private *stream, uoff_t v_offset,
+			       bool mark ATTR_UNUSED)
+{
+	stream->skip = v_offset;
+	stream->istream.v_offset = v_offset;
+}
+
+struct istream *i_stream_create_from_data(const void *data, size_t size)
+{
+	struct istream_private *stream;
+
+	stream = i_new(struct istream_private, 1);
+	stream->buffer = data;
+	stream->pos = size;
+	stream->max_buffer_size = SIZE_MAX;
+
+	stream->read = i_stream_data_read;
+	stream->seek = i_stream_data_seek;
+
+	stream->istream.readable_fd = FALSE;
+	stream->istream.blocking = TRUE;
+	stream->istream.seekable = TRUE;
+	i_stream_create(stream, NULL, -1, ISTREAM_CREATE_FLAG_NOOP_SNAPSHOT);
+	stream->statbuf.st_size = size;
+	i_stream_set_name(&stream->istream, "(buffer)");
+	return &stream->istream;
+}
+
+static void i_stream_copied_data_free(void *data)
+{
+	i_free(data);
+}
+struct istream *
+i_stream_create_copy_from_data(const void *data, size_t size)
+{
+	struct istream *stream;
+	void *buffer;
+
+	if (size == 0) {
+		buffer = "";
+	} else {
+		buffer = i_malloc(size);
+		memcpy(buffer, data, size);
+	}
+	stream = i_stream_create_from_data(buffer, size);
+	if (size > 0) {
+		i_stream_add_destroy_callback
+			(stream, i_stream_copied_data_free, buffer);
+	}
+	return stream;
+}