wplua: move under modules/module-lua-scripting

It's unlikely that wplua will ever be useful outside the context
of module-lua-scripting, so let's move it to keep all the code in one place

modules/module-lua-scripting/wplua/wplua.h

@@ -0,0 +1,100 @@
+/* WirePlumber
+ *
+ * Copyright © 2020 Collabora Ltd.
+ *    @author George Kiagiadakis <george.kiagiadakis@collabora.com>
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+#ifndef __WPLUA_H__
+#define __WPLUA_H__
+
+#include <wp/wp.h>
+
+#include <lua.h>
+#include <lauxlib.h>
+#include <lualib.h>
+
+G_BEGIN_DECLS
+
+/**
+ * WP_DOMAIN_LUA:
+ *
+ * @brief A <a href="https://developer.gnome.org/glib/stable/glib-Error-Reporting.html#GError">
+ * GError</a> domain for errors that occurred within the context of the
+ * WirePlumber lua library.
+ */
+#define WP_DOMAIN_LUA (wp_domain_lua_quark ())
+GQuark wp_domain_lua_quark (void);
+
+/**
+ * WpLuaError:
+ *
+ * @brief
+ * @em WP_LUA_ERROR_COMPILATION: a compilation error, i.e. invalid Lua code
+ * @em WP_LUA_ERROR_RUNTIME: a runtime error, i.e. misbehaving Lua code
+ *
+ * Error codes that can appear in a
+ * <a href="https://developer.gnome.org/glib/stable/glib-Error-Reporting.html#GError">
+ * GError</a> when the error domain is %WP_DOMAIN_LUA
+ */
+typedef enum {
+  WP_LUA_ERROR_COMPILATION,
+  WP_LUA_ERROR_RUNTIME,
+} WpLuaError;
+
+typedef enum {
+  WP_LUA_SANDBOX_MINIMAL_STD,
+  WP_LUA_SANDBOX_ISOLATE_ENV,
+} WpLuaSandboxFlags;
+
+lua_State * wplua_new (void);
+void wplua_free (lua_State * L);
+
+void wplua_enable_sandbox (lua_State * L, WpLuaSandboxFlags flags);
+
+void wplua_register_type_methods (lua_State * L, GType type,
+    lua_CFunction constructor, const luaL_Reg * methods);
+
+GType wplua_gvalue_userdata_type (lua_State *L, int idx);
+
+/* push -> transfer full; get -> transfer none */
+void wplua_pushobject (lua_State * L, gpointer object);
+gpointer wplua_toobject (lua_State *L, int idx);
+gpointer wplua_checkobject (lua_State *L, int idx, GType type);
+gboolean wplua_isobject (lua_State *L, int idx, GType type);
+
+/* push -> transfer full; get -> transfer none */
+void wplua_pushboxed (lua_State * L, GType type, gpointer object);
+gpointer wplua_toboxed (lua_State *L, int idx);
+gpointer wplua_checkboxed (lua_State *L, int idx, GType type);
+gboolean wplua_isboxed (lua_State *L, int idx, GType type);
+
+/* transfer floating */
+GClosure * wplua_checkclosure (lua_State *L, int idx);
+GClosure * wplua_function_to_closure (lua_State *L, int idx);
+
+void wplua_enum_to_lua (lua_State *L, gint enum_val, GType enum_type);
+gint wplua_lua_to_enum (lua_State *L, int idx, GType enum_type);
+
+void wplua_lua_to_gvalue (lua_State *L, int idx, GValue *v);
+int wplua_gvalue_to_lua (lua_State *L, const GValue *v);
+
+GVariant * wplua_lua_to_gvariant (lua_State *L, int idx);
+void wplua_gvariant_to_lua (lua_State *L, GVariant *p);
+
+WpProperties * wplua_table_to_properties (lua_State *L, int idx);
+void wplua_properties_to_table (lua_State *L, WpProperties *p);
+
+gboolean wplua_load_buffer (lua_State * L, const gchar *buf, gsize size,
+     int nargs, int nres, GError **error);
+gboolean wplua_load_uri (lua_State * L, const gchar *uri, int nargs, int nres,
+    GError **error);
+gboolean wplua_load_path (lua_State * L, const gchar *path, int nargs, int nres,
+    GError **error);
+
+G_DEFINE_AUTOPTR_CLEANUP_FUNC(lua_State, wplua_free)
+
+G_END_DECLS
+
+#endif