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Expose footsteps[], footsteps.iterate and #footsteps to Lua

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This commit is contained in:
JugadorXEI 2025-03-17 19:38:57 +01:00
parent ec28814cd6
commit 0e083ba8d6
1 changed files with 79 additions and 0 deletions
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79
src/lua_terrainlib.c
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@ -304,6 +304,75 @@ static int footstep_num(lua_State *L)
return 1;
}
static int lib_iterateFootsteps(lua_State *L)
{
size_t i;
if (lua_gettop(L) < 2)
{
lua_pushcfunction(L, lib_iterateFootsteps);
return 1;
}
lua_settop(L, 2);
lua_remove(L, 1); // state is unused.
if (!lua_isnil(L, 1))
i = K_GetFootstepHeapIndex(*(t_footstep_t **)luaL_checkudata(L, 1, META_FOOTSTEP)) + 1;
else
i = 0;
// footsteps are always valid, only added, never removed
if (i < K_GetNumFootstepDefs())
{
LUA_PushUserdata(L, K_GetFootstepByIndex(i), META_FOOTSTEP);
return 1;
}
return 0;
}
static int lib_getFootstep(lua_State *L)
{
const char *field;
size_t i;
// find footstep by number
if (lua_type(L, 2) == LUA_TNUMBER)
{
i = luaL_checkinteger(L, 2);
if (i >= K_GetNumFootstepDefs())
return luaL_error(L, "footsteps[] index %d out of range (0 - %d)", i, K_GetNumFootstepDefs()-1);
LUA_PushUserdata(L, K_GetFootstepByIndex(i), META_FOOTSTEP);
return 1;
}
field = luaL_checkstring(L, 2);
// special function iterate
if (fastcmp(field,"iterate"))
{
lua_pushcfunction(L, lib_iterateFootsteps);
return 1;
}
// find footstep by name
t_footstep_t *byname = K_GetFootstepByName(field);
if (byname != NULL)
{
LUA_PushUserdata(L, byname, META_FOOTSTEP);
return 1;
}
return 0;
}
static int lib_numFootsteps(lua_State *L)
{
lua_pushinteger(L, K_GetNumFootstepDefs());
return 1;
}
static int overlay_get(lua_State *L)
{
t_overlay_t *overlay = *((t_overlay_t **)luaL_checkudata(L, 1, META_OVERLAY));
@ -626,6 +695,16 @@ int LUA_TerrainLib(lua_State *L)
lua_pushcfunction(L, footstep_num);
lua_setfield(L, -2, "__len");
lua_pop(L,1);
lua_newuserdata(L, 0);
lua_createtable(L, 0, 2);
lua_pushcfunction(L, lib_getFootstep);
lua_setfield(L, -2, "__index");
lua_pushcfunction(L, lib_numFootsteps);
lua_setfield(L, -2, "__len");
lua_setmetatable(L, -2);
lua_setglobal(L, "footsteps");
luaL_newmetatable(L, META_OVERLAY);
lua_pushcfunction(L, overlay_get);