From 83dc84f790985b13e54864255b1e8693dbf3b8b6 Mon Sep 17 00:00:00 2001
From: Joe Thornber <ejt@redhat.com>
Date: Thu, 24 Mar 2016 15:21:20 +0000
Subject: [PATCH] [contrib] ewheeler_emitter.so

For thin_dump
---
 contrib/Makefile.in         |  7 +++-
 contrib/ewheeler_emitter.cc | 84 +++++++++++++++++++++++++++++++++++++
 2 files changed, 90 insertions(+), 1 deletion(-)
 create mode 100644 contrib/ewheeler_emitter.cc

diff --git a/contrib/Makefile.in b/contrib/Makefile.in
index 58cfefc..1df15ec 100644
--- a/contrib/Makefile.in
+++ b/contrib/Makefile.in
@@ -1,6 +1,7 @@
 PLUGINS=\
 	contrib/thin_sexp_emitter.so \
-	contrib/tmakatos_emitter.so
+	contrib/tmakatos_emitter.so \
+	contrib/ewheeler_emitter.so
 
 contrib: $(PLUGINS)
 
@@ -12,4 +13,8 @@ contrib/tmakatos_emitter.so: contrib/tmakatos_emitter.o
 	$(V)echo "    [LD] $@"
 	$(V)$(CC) -shared -Wl,-soname,tmakatos_emitter.so -o $@ $<
 
+contrib/ewheeler_emitter.so: contrib/ewheeler_emitter.o
+	$(V)echo "    [LD] $@"
+	$(V)$(CC) -shared -Wl,-soname,ewheeler_emitter.so -o $@ $<
+
 
diff --git a/contrib/ewheeler_emitter.cc b/contrib/ewheeler_emitter.cc
new file mode 100644
index 0000000..fdc310d
--- /dev/null
+++ b/contrib/ewheeler_emitter.cc
@@ -0,0 +1,84 @@
+#include "thin-provisioning/emitter.h"
+
+using namespace std;
+using namespace thin_provisioning;
+
+//----------------------------------------------------------------
+
+namespace {
+	template <typename T>
+	std::ostream &operator << (ostream &out, boost::optional<T> const &maybe) {
+		if (maybe)
+			out << *maybe;
+
+		return out;
+	}
+
+	class old_emitter : public emitter {
+	public:
+		old_emitter(ostream &out)
+		: out_(out) {
+		}
+
+		void begin_superblock(string const &uuid,
+				      uint64_t time,
+				      uint64_t trans_id,
+				      boost::optional<uint32_t> flags,
+				      boost::optional<uint32_t> version,
+				      uint32_t data_block_size,
+				      uint64_t nr_data_blocks,
+				      boost::optional<uint64_t> metadata_snap) {
+			data_block_size_ = data_block_size;
+		}
+
+		void end_superblock() {
+		}
+
+		void begin_device(uint32_t dev_id,
+				  uint64_t mapped_blocks,
+				  uint64_t trans_id,
+				  uint64_t creation_time,
+				  uint64_t snap_time) {
+		}
+
+		void end_device() {
+		}
+
+		void begin_named_mapping(string const &name) {
+		}
+
+		void end_named_mapping() {
+		}
+
+		void identifier(string const &name) {
+		}
+
+		void range_map(uint64_t origin_begin, uint64_t data_begin, uint32_t time, uint64_t len) {
+			out_ << (data_block_size_ << 9)*origin_begin
+			     << ":" << (data_block_size_ << 9)*len
+			     << ":" << (data_block_size_ << 9)*data_begin
+			     << endl;
+		}
+
+		void single_map(uint64_t origin_block, uint64_t data_block, uint32_t time) {
+			out_ << (data_block_size_ << 9)*origin_block
+			     << ":" << (data_block_size_ << 9)
+			     << ":" << (data_block_size_ << 9)*data_block
+			     << endl;
+		}
+
+	private:
+		ostream &out_;
+		uint64_t data_block_size_;
+	};
+}
+
+//----------------------------------------------------------------
+
+extern "C" {
+	emitter::ptr create_emitter(ostream &out) {
+		return emitter::ptr(new old_emitter(out));
+	}
+}
+
+//----------------------------------------------------------------