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Mkae Lua taggroups indexable 

They are 1-indexed.
This commit is contained in:
James R 2020-12-04 04:54:12 -08:00
parent 96851e52a1
commit c2217bb426
1 changed files with 24 additions and 13 deletions
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37
src/lua_taglib.c
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@ -71,16 +71,9 @@ struct element_iterator_state {
static int element_iterator(lua_State *L)
{
struct element_iterator_state * state = lua_touserdata(L, 1);
const INT32 element = next_element(L, state->tag, state->p);
if (element == -1)
return 0;
else
{
push_next_element(L, element);
state->p++;
return 1;
}
lua_pushnumber(L, ++state->p);
lua_gettable(L, 1);
return 1;
}
static int lib_iterateTags(lua_State *L)
@ -129,6 +122,21 @@ static int lib_getTaggroup(lua_State *L)
return 1;
}
static int lib_getTaggroupElement(lua_State *L)
{
const size_t p = luaL_checknumber(L, 2) - 1;
const mtag_t tag = *(mtag_t *)lua_touserdata(L, 1);
const INT32 element = next_element(L, tag, p);
if (element == -1)
return 0;
else
{
push_next_element(L, element);
return 1;
}
}
static int lib_numTaggroupElements(lua_State *L)
{
const mtag_t tag = *(mtag_t *)lua_touserdata(L, 1);
@ -150,7 +158,7 @@ void LUA_InsertTaggroupIterator
size_t sizeof_element,
const char * meta)
{
lua_createtable(L, 0, 2);
lua_createtable(L, 0, 3);
lua_pushlightuserdata(L, garray);
lua_pushlightuserdata(L, max_elements);
@ -159,11 +167,14 @@ void LUA_InsertTaggroupIterator
lua_pushlightuserdata(L, element_array);
lua_pushnumber(L, sizeof_element);
luaL_getmetatable(L, meta);
lua_pushcclosure(L, element_iterator, 5);
lua_setfield(L, -4, "__call");
lua_pushcclosure(L, lib_getTaggroupElement, 5);
lua_setfield(L, -4, "__index");
lua_pushcclosure(L, lib_numTaggroupElements, 2);
lua_setfield(L, -2, "__len");
lua_pushcfunction(L, element_iterator);
lua_setfield(L, -2, "__call");
lua_pushcclosure(L, lib_getTaggroup, 1);
lua_setfield(L, -2, "tagged");
}