From 9ca019f03e1bb4a507e4bd2d5a7025473df8ccc5 Mon Sep 17 00:00:00 2001
From: Jason Volk <jason@zemos.net>
Date: Thu, 27 Jun 2019 22:56:50 -0700
Subject: [PATCH] ircd::m::id::event: Add non-throwing static tests of v3/v4 id
 from string.

---
 include/ircd/m/id.h |  4 ++++
 ircd/m_id.cc        | 28 ++++++++++++++++++++++++++++
 2 files changed, 32 insertions(+)

diff --git a/include/ircd/m/id.h b/include/ircd/m/id.h
index 538b2612d..e41d65c13 100644
--- a/include/ircd/m/id.h
+++ b/include/ircd/m/id.h
@@ -179,6 +179,8 @@ struct ircd::m::id::event
 struct ircd::m::id::event::v3
 :ircd::m::id::event
 {
+	static bool is(const string_view &) noexcept;
+
 	v3(const mutable_buffer &out, const m::event &);
 	v3(const string_view &id);
 	v3() = default;
@@ -188,6 +190,8 @@ struct ircd::m::id::event::v3
 struct ircd::m::id::event::v4
 :ircd::m::id::event
 {
+	static bool is(const string_view &) noexcept;
+
 	v4(const mutable_buffer &out, const m::event &);
 	v4(const string_view &id);
 	v4() = default;
diff --git a/ircd/m_id.cc b/ircd/m_id.cc
index abf79ed98..b6f3c3a7c 100644
--- a/ircd/m_id.cc
+++ b/ircd/m_id.cc
@@ -732,6 +732,20 @@ ircd::m::id::event::v3::v3(const mutable_buffer &out,
 {
 }
 
+bool
+ircd::m::id::event::v3::is(const string_view &id)
+noexcept
+{
+	static const parser::rule<> &valid
+	{
+		parser.event_id_v3
+	};
+
+	auto *start(std::begin(id));
+	auto *const stop(std::end(id));
+	return qi::parse(start, stop, valid);
+}
+
 //
 // id::event::v4
 //
@@ -785,6 +799,20 @@ ircd::m::id::event::v4::v4(const mutable_buffer &out,
 {
 }
 
+bool
+ircd::m::id::event::v4::is(const string_view &id)
+noexcept
+{
+	static const parser::rule<> &valid
+	{
+		parser.event_id_v4
+	};
+
+	auto *start(std::begin(id));
+	auto *const stop(std::end(id));
+	return qi::parse(start, stop, valid);
+}
+
 //
 // util
 //