[Minor] Lua_tensor: Add __len method

diff --git a/src/lua/lua_tensor.c b/src/lua/lua_tensor.c
index 1506d45488390ec33c9465e8dab07a5cadce3146..4fcc7e2011a837e7edff7ff7c6c5583547696c2b 100644 (file)
--- a/src/lua/lua_tensor.c
+++ b/src/lua/lua_tensor.c
@@ -34,6 +34,7 @@ LUA_FUNCTION_DEF (tensor, mul);
 LUA_FUNCTION_DEF (tensor, tostring);
 LUA_FUNCTION_DEF (tensor, index);
 LUA_FUNCTION_DEF (tensor, newindex);
+LUA_FUNCTION_DEF (tensor, len);
 
 static luaL_reg rspamd_tensor_f[] = {
                LUA_INTERFACE_DEF (tensor, load),
@@ -51,6 +52,7 @@ static luaL_reg rspamd_tensor_m[] = {
                {"__tostring", lua_tensor_tostring},
                {"__index", lua_tensor_index},
                {"__newindex", lua_tensor_newindex},
+               {"__len", lua_tensor_len},
                {NULL, NULL},
 };
 
@@ -560,6 +562,30 @@ lua_tensor_load (lua_State *L)
        return 1;
 }
 
+static gint
+lua_tensor_len (lua_State *L)
+{
+       struct rspamd_lua_tensor *t = lua_check_tensor (L, 1);
+       gint nret = 1;
+
+       if (t) {
+               /* Return the main dimension first */
+               if (t->ndims == 1) {
+                       lua_pushinteger (L, t->dim[0]);
+               }
+               else {
+                       lua_pushinteger (L, t->dim[0]);
+                       lua_pushinteger (L, t->dim[1]);
+                       nret = 2;
+               }
+       }
+       else {
+               return luaL_error (L, "invalid arguments");
+       }
+
+       return nret;
+}
+
 static gint
 lua_load_tensor (lua_State * L)
 {