From d9a3866299bc43c5139e8812ba8c2dbfc4ece343 Mon Sep 17 00:00:00 2001
From: Robin Gareus <robin@gareus.org>
Date: Tue, 14 Aug 2018 23:49:43 +0200
Subject: [PATCH] Add a locale-independent float/double format Lua method

print(ARDOUR.LuaAPI.ascii_dtostr(1.5))
---
 libs/ardour/ardour/lua_api.h | 4 ++++
 libs/ardour/lua_api.cc       | 8 ++++++++
 libs/ardour/luabindings.cc   | 1 +
 3 files changed, 13 insertions(+)

diff --git a/libs/ardour/ardour/lua_api.h b/libs/ardour/ardour/lua_api.h
index fe956c6b43..7c2c309982 100644
--- a/libs/ardour/ardour/lua_api.h
+++ b/libs/ardour/ardour/lua_api.h
@@ -187,6 +187,10 @@ namespace ARDOUR { namespace LuaAPI {
 	 */
 	int color_to_rgba (lua_State *lua);
 
+	/**
+	 */
+	std::string ascii_dtostr (const double d);
+
 	/**
 	 * Creates a filename from a series of elements using the correct separator for filenames.
 	 *
diff --git a/libs/ardour/lua_api.cc b/libs/ardour/lua_api.cc
index 59d2749399..82ff2fd651 100644
--- a/libs/ardour/lua_api.cc
+++ b/libs/ardour/lua_api.cc
@@ -527,6 +527,14 @@ ARDOUR::LuaAPI::hsla_to_rgba (lua_State *L)
 	return 4;
 }
 
+std::string
+ARDOUR::LuaAPI::ascii_dtostr (const double d)
+{
+	gchar buf[G_ASCII_DTOSTR_BUF_SIZE];
+	g_ascii_dtostr (buf, sizeof(buf), d);
+	return std::string (buf);
+}
+
 int
 ARDOUR::LuaAPI::color_to_rgba (lua_State *L)
 {
diff --git a/libs/ardour/luabindings.cc b/libs/ardour/luabindings.cc
index d82fb38bc6..90c8b8ad90 100644
--- a/libs/ardour/luabindings.cc
+++ b/libs/ardour/luabindings.cc
@@ -2330,6 +2330,7 @@ LuaBindings::common (lua_State* L)
 		.addCFunction ("plugin_automation", ARDOUR::LuaAPI::plugin_automation)
 		.addCFunction ("hsla_to_rgba", ARDOUR::LuaAPI::hsla_to_rgba)
 		.addCFunction ("color_to_rgba", ARDOUR::LuaAPI::color_to_rgba)
+		.addFunction ("ascii_dtostr", ARDOUR::LuaAPI::ascii_dtostr)
 		.addFunction ("usleep", Glib::usleep)
 		.addFunction ("monotonic_time", ::g_get_monotonic_time)
 		.addCFunction ("build_filename", ARDOUR::LuaAPI::build_filename)