c7813e07e4
Allow people to use their own emitters held in a shared library. Put a trivial emitter in contrib/ as an example.
121 lines
2.7 KiB
C++
121 lines
2.7 KiB
C++
#include "base/indented_stream.h"
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#include "thin-provisioning/emitter.h"
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using namespace std;
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using namespace thin_provisioning;
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//----------------------------------------------------------------
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namespace {
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class sexp_emitter : public emitter {
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public:
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sexp_emitter(ostream &out)
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: out_(out) {
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}
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virtual void begin_superblock(std::string const &uuid,
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uint64_t time,
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uint64_t trans_id,
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boost::optional<uint32_t> flags,
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boost::optional<uint32_t> version,
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uint32_t data_block_size,
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uint64_t nr_data_blocks,
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boost::optional<uint64_t> metadata_snap) {
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open("superblock");
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out_.indent();
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out_ << "((uuid \"" << uuid << "\")\n";
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kv("time", time);
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kv("trans_id", trans_id);
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kv("flags", flags);
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kv("version", version);
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kv("data_block_size", data_block_size);
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kv("nr_data_blocks", nr_data_blocks);
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kv("metadata_snap", metadata_snap);
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out_.indent();
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out_ << ")\n";
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}
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virtual void end_superblock() {
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close();
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}
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virtual void begin_device(uint32_t dev_id,
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uint64_t mapped_blocks,
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uint64_t trans_id,
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uint64_t creation_time,
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uint64_t snap_time) {
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open("device");
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out_.indent();
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out_ << "((dev_id " << dev_id << ")\n";
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kv("mapped_blocks", mapped_blocks);
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kv("trans_id", trans_id);
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kv("creation_time", creation_time);
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kv("snap_time", snap_time);
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out_.indent();
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out_ << ")\n";
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}
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virtual void end_device() {
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close();
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}
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virtual void begin_named_mapping(std::string const &name) {
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}
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virtual void end_named_mapping() {
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}
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virtual void identifier(std::string const &name) {
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}
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virtual void range_map(uint64_t origin_begin, uint64_t data_begin, uint32_t time, uint64_t len) {
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out_.indent();
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out_ << "(range (origin_begin " << origin_begin
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<< ") (data_begin " << data_begin
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<< ") (time " << time
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<< ") (len " << len << "))\n";
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}
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virtual void single_map(uint64_t origin_block, uint64_t data_block, uint32_t time) {
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out_.indent();
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out_ << "(single (origin_block " << origin_block
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<< ") (data_block " << data_block
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<< ") (time " << time << "))\n";
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}
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private:
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void open(char const *tag) {
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out_.indent();
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out_ << "(" << tag << "\n";
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out_.inc();
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}
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void close() {
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out_.dec();
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out_.indent();
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out_ << ")\n";
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}
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template <typename T>
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void kv(char const *k, T const &v) {
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out_.indent();
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out_ << " (" << k << " " << v << ")\n";
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}
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indented_stream out_;
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};
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}
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//----------------------------------------------------------------
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extern "C" {
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emitter::ptr create_emitter(ostream &out) {
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return emitter::ptr(new sexp_emitter(out));
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}
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}
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//----------------------------------------------------------------
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