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lua: support metatable to save table type #7891

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merged 2 commits into from
Sep 23, 2023
Merged

lua: support metatable to save table type #7891

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dd3c636
tests: runtime: filter_lua: add test for empty array and metatable
nokute78 Sep 2, 2023
fd769ec
lua: support metatable to save table type
nokute78 Sep 2, 2023
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24 changes: 23 additions & 1 deletion include/fluent-bit/flb_lua.h
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Original file line number Diff line number Diff line change
Expand Up @@ -33,7 +33,8 @@

enum flb_lua_l2c_type_enum {
FLB_LUA_L2C_TYPE_INT,
FLB_LUA_L2C_TYPE_ARRAY
FLB_LUA_L2C_TYPE_ARRAY,
FLB_LUA_L2C_TYPE_MAP
};

struct flb_lua_l2c_type {
Expand All @@ -47,6 +48,27 @@ struct flb_lua_l2c_config {
struct mk_list l2c_types; /* data types (lua -> C) */
};


/*
* Metatable for Lua table.
* https://www.lua.org/manual/5.1/manual.html#2.8
*/
struct flb_lua_metadata {
int initialized;
int data_type; /* Map or Array */
};

static inline int flb_lua_metadata_init(struct flb_lua_metadata *meta)
{
if (meta == NULL) {
return -1;
}
meta->initialized = FLB_TRUE;
meta->data_type = -1;

return 0;
}

/* convert from negative index to positive index */
static inline int flb_lua_absindex(lua_State *l , int index)
{
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