commit a014c22: [Minor] Fix various cases in Lua API

[Vsevolod Stakhov]

Author: Vsevolod Stakhov
Date: 2019-06-28 18:07:11 +0100
URL: https://github.com/rspamd/rspamd/commit/a014c2274bf178774697ce2a2b83a02bf6a3ac1c

[Minor] Fix various cases in Lua API

---
 src/lua/CMakeLists.txt  |  3 ++-
 src/lua/lua_common.c    | 15 ++++++++++-----
 src/lua/lua_common.h    |  5 +++--
 src/lua/lua_cryptobox.c |  4 ++--
 4 files changed, 17 insertions(+), 10 deletions(-)

diff --git a/src/lua/CMakeLists.txt b/src/lua/CMakeLists.txt
index 4a2003605..2730702b2 100644
--- a/src/lua/CMakeLists.txt
+++ b/src/lua/CMakeLists.txt
@@ -29,6 +29,7 @@ SET(LUASRC			  ${CMAKE_CURRENT_SOURCE_DIR}/lua_common.c
 					  ${CMAKE_CURRENT_SOURCE_DIR}/lua_dns.c
 					  ${CMAKE_CURRENT_SOURCE_DIR}/lua_udp.c
 					  ${CMAKE_CURRENT_SOURCE_DIR}/lua_text.c
-		 			  ${CMAKE_CURRENT_SOURCE_DIR}/lua_worker.c)
+		 			  ${CMAKE_CURRENT_SOURCE_DIR}/lua_worker.c
+					  ${CMAKE_CURRENT_SOURCE_DIR}/lua_kann.c)
 
 SET(RSPAMD_LUA ${LUASRC} PARENT_SCOPE)
\ No newline at end of file
diff --git a/src/lua/lua_common.c b/src/lua/lua_common.c
index a33f33791..785042b8e 100644
--- a/src/lua/lua_common.c
+++ b/src/lua/lua_common.c
@@ -47,7 +47,7 @@ lua_error_quark (void)
 
 /* Util functions */
 /**
- * Create new class and store metatable on top of the stack
+ * Create new class and store metatable on top of the stack (must be popped if not needed)
  * @param L
  * @param classname name of class
  * @param func table of class methods
@@ -62,10 +62,14 @@ rspamd_lua_new_class (lua_State * L,
 	lua_pushvalue (L, -2);      /* pushes the metatable */
 	lua_settable (L, -3);       /* metatable.__index = metatable */
 
-	lua_pushstring (L, "class");    /* mt,"__index",it,"class" */
-	lua_pushstring (L, classname);  /* mt,"__index",it,"class",classname */
-	lua_rawset (L, -3);         /* mt,"__index",it */
-	luaL_register (L, NULL, methods);
+	lua_pushstring (L, "class");    /* mt,"class" */
+	lua_pushstring (L, classname);  /* mt,"class",classname */
+	lua_rawset (L, -3);         /* mt */
+
+	if (methods) {
+		luaL_register (L, NULL, methods); /* pushes all methods as MT fields */
+	}
+	/* MT is left on stack ! */
 }
 
 /**
@@ -915,6 +919,7 @@ rspamd_lua_init (bool wipe_mem)
 	luaopen_dns (L);
 	luaopen_udp (L);
 	luaopen_worker (L);
+	luaopen_kann (L);
 
 	luaL_newmetatable (L, "rspamd{ev_base}");
 	lua_pushstring (L, "class");
diff --git a/src/lua/lua_common.h b/src/lua/lua_common.h
index 8919a46fd..4c0605782 100644
--- a/src/lua/lua_common.h
+++ b/src/lua/lua_common.h
@@ -42,9 +42,9 @@ luaL_register (lua_State *L, const gchar *name, const struct luaL_reg *methods)
 #endif
 
 /* Interface definitions */
-#define LUA_FUNCTION_DEF(class, name) static gint lua_ ## class ## _ ## name ( \
+#define LUA_FUNCTION_DEF(class, name) static int lua_ ## class ## _ ## name ( \
 		lua_State * L)
-#define LUA_PUBLIC_FUNCTION_DEF(class, name) gint lua_ ## class ## _ ## name ( \
+#define LUA_PUBLIC_FUNCTION_DEF(class, name) int lua_ ## class ## _ ## name ( \
 		lua_State * L)
 #define LUA_INTERFACE_DEF(class, name) { # name, lua_ ## class ## _ ## name }
 
@@ -286,6 +286,7 @@ void luaopen_cryptobox (lua_State *L);
 void luaopen_dns (lua_State *L);
 void luaopen_udp (lua_State * L);
 void luaopen_worker (lua_State * L);
+void luaopen_kann (lua_State * L);
 
 void rspamd_lua_dostring (const gchar *line);
 
diff --git a/src/lua/lua_cryptobox.c b/src/lua/lua_cryptobox.c
index 300c33793..63608ed9a 100644
--- a/src/lua/lua_cryptobox.c
+++ b/src/lua/lua_cryptobox.c
@@ -1075,8 +1075,8 @@ lua_cryptobox_hash_create (lua_State *L)
 /***
  * @function rspamd_cryptobox_hash.create_specific(type, [string])
  * Creates new hash context
- * @param {string} type type of signature
- * @param {string} data raw signature data
+ * @param {string} type type of hash (blake2, sha256, md5, sha512, mum, xxh64, xxh32, t1ha)
+ * @param {string} string initial data
  * @return {cryptobox_hash} hash object
  */
 static gint