1 files changed, 67 insertions, 0 deletions
diff --git a/toolkit/components/glean/build_scripts/glean_parser_ext/templates/js_pings.jinja2 b/toolkit/components/glean/build_scripts/glean_parser_ext/templates/js_pings.jinja2
new file mode 100644
index 0000000000..4fa43832a6
--- /dev/null
+++ b/toolkit/components/glean/build_scripts/glean_parser_ext/templates/js_pings.jinja2
@@ -0,0 +1,67 @@
+// -*- mode: C++ -*-
+
+// AUTOGENERATED BY glean_parser.  DO NOT EDIT.
+{# The rendered source is autogenerated, but this
+Jinja2 template is not. Please file bugs! #}
+
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "mozilla/glean/bindings/GleanJSPingsLookup.h"
+
+#include "mozilla/PerfectHash.h"
+#include "nsString.h"
+
+#include "mozilla/PerfectHash.h"
+
+#define GLEAN_PING_INDEX_BITS ({{ping_index_bits}})
+#define GLEAN_PING_ID(entry) ((entry) >> GLEAN_PING_INDEX_BITS)
+#define GLEAN_PING_INDEX(entry) ((entry) & ((1UL << GLEAN_PING_INDEX_BITS) - 1))
+
+namespace mozilla::glean {
+
+// Contains the ping id and the index into the ping string table.
+using ping_entry_t = uint32_t;
+
+Maybe<uint32_t> ping_result_check(const nsACString& aKey, ping_entry_t aEntry);
+
+{{ ping_string_table }}
+
+{{ ping_by_name_lookup }}
+
+/**
+ * Get a ping's name given its entry from the PHF.
+ */
+const char* GetPingName(ping_entry_t aEntry) {
+  uint32_t idx = GLEAN_PING_INDEX(aEntry);
+  MOZ_ASSERT(idx < sizeof(gPingStringTable), "Ping index larger than string table");
+  return &gPingStringTable[idx];
+}
+
+/**
+ * Check if the found entry is pointing at the correct ping.
+ * PHF can false-positive a result when the key isn't present, so we check
+ * for a string match. If it fails, return Nothing(). If we found it,
+ * return the ping's id.
+ */
+Maybe<uint32_t> ping_result_check(const nsACString& aKey, ping_entry_t aEntry) {
+  uint32_t idx = GLEAN_PING_INDEX(aEntry);
+  uint32_t id = GLEAN_PING_ID(aEntry);
+
+  if (MOZ_UNLIKELY(idx > sizeof(gPingStringTable))) {
+    return Nothing();
+  }
+
+  if (aKey.EqualsASCII(&gPingStringTable[idx])) {
+    return Some(id);
+  }
+
+  return Nothing();
+}
+
+#undef GLEAN_PING_INDEX_BITS
+#undef GLEAN_PING_ID
+#undef GLEAN_PING_INDEX
+
+}  // namespace mozilla::glean