1 files changed, 53 insertions, 0 deletions
diff --git a/src/common/hobject_fmt.h b/src/common/hobject_fmt.h
new file mode 100644
index 000000000..622611121
--- /dev/null
+++ b/src/common/hobject_fmt.h
@@ -0,0 +1,53 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+#pragma once
+
+/**
+ * \file fmtlib formatters for some hobject.h classes
+ */
+#include <fmt/format.h>
+#include <fmt/ranges.h>
+
+#include "common/hobject.h"
+#include "include/object_fmt.h"
+#include "msg/msg_fmt.h"
+
+// \todo reimplement
+static inline void append_out_escaped(const std::string& in, std::string* out)
+{
+  for (auto i = in.cbegin(); i != in.cend(); ++i) {
+    if (*i == '%' || *i == ':' || *i == '/' || *i < 32 || *i >= 127) {
+      char buf[4];
+      snprintf(buf, sizeof(buf), "%%%02x", (int)(unsigned char)*i);
+      out->append(buf);
+    } else {
+      out->push_back(*i);
+    }
+  }
+}
+
+template <> struct fmt::formatter<hobject_t> {
+
+  constexpr auto parse(format_parse_context& ctx) { return ctx.begin(); }
+
+  template <typename FormatContext> auto format(const hobject_t& ho, FormatContext& ctx)
+  {
+    if (ho == hobject_t{}) {
+      return fmt::format_to(ctx.out(), "MIN");
+    }
+
+    if (ho.is_max()) {
+      return fmt::format_to(ctx.out(), "MAX");
+    }
+
+    std::string v;
+    append_out_escaped(ho.nspace, &v);
+    v.push_back(':');
+    append_out_escaped(ho.get_key(), &v);
+    v.push_back(':');
+    append_out_escaped(ho.oid.name, &v);
+
+    return fmt::format_to(ctx.out(), "{}:{:08x}:{}:{}", static_cast<uint64_t>(ho.pool),
+			  ho.get_bitwise_key_u32(), v, ho.snap);
+  }
+};