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/apps/twnlua: expose ctx

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This commit is contained in:
veclavtalica 2025-01-11 16:01:41 +03:00
parent 313108092b
commit 777a06a002
3 changed files with 93 additions and 57 deletions
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132
apps/twnlua/bindgen.py
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@ -36,6 +36,8 @@ def to_table(typedesc, variable, indent = 0):
for field in typedesc["fields"]:
if field["type"] == "float":
binding += ' ' * indent + "lua_pushnumber(L, (double)(%s));\n" % (variable + ".%s" % field["name"])
elif field["type"] == "bool":
binding += ' ' * indent + "lua_pushboolean(L, (%s));\n" % (variable + ".%s" % field["name"])
elif field["type"] in api["types"]:
binding += to_table(api["types"][field["type"]], variable + ".%s" % field["name"], indent + 4)
else:
@ -52,9 +54,68 @@ print('#include <lua.h>')
print('#include <lualib.h>')
print('#include <lauxlib.h>\n')
bindings, used_converters = [], {}
for procedure, procedure_desc in api["procedures"].items():
binding = "static int binding_%s(lua_State *L) {\n" % procedure
binding += " luaL_checktype(L, 1, LUA_TTABLE);\n"
if "params" in procedure_desc:
for parameter in procedure_desc["params"]:
basetype = parameter["type"].rsplit(' *', 1)[0]
if parameter["type"].endswith("*"):
binding += " %s %s_value;\n" % (basetype, parameter["name"])
binding += " %s %s;\n" % (parameter["type"], parameter["name"])
binding += " lua_getfield(L, 1, \"%s\");\n" % parameter["name"]
if "default" in parameter:
binding += " if (lua_isnoneornil(L, -1))\n"
binding += " %s = %s;\n" % (parameter["name"], default(parameter))
binding += " else\n "
if parameter["type"] == "float":
binding += " %s = (float)lua_tonumber(L, -1);\n" % (parameter["name"]);
elif parameter["type"] == "bool":
binding += " %s = lua_toboolean(L, -1);\n" % (parameter["name"]);
elif parameter["type"] == "char *":
binding += " %s = lua_tostring(L, -1);\n" % (parameter["name"]);
elif basetype in api["types"]:
used_converters[basetype] = api["types"][basetype]
if parameter["type"].endswith(" *"):
binding += " { %s_value = to_%s(L, -1); %s = &%s_value; }\n" % (parameter["name"], basetype.lower(), parameter["name"], parameter["name"]);
else:
binding += " %s = to_%s(L, -1);\n" % (parameter["name"], basetype.lower());
else:
raise BaseException("Unhandled parameter type '%s'" % (parameter["type"]))
if "return" in procedure_desc:
if procedure_desc["return"] == "bool":
binding += " lua_pushboolean(L, (int)%s(%s));\n" % (procedure, ", ".join(param["name"] for param in procedure_desc["params"]))
elif procedure_desc["return"] == "float":
binding += " lua_pushnumber(L, (double)%s(%s));\n" % (procedure, ", ".join(param["name"] for param in procedure_desc["params"]))
elif procedure_desc["return"] == "char *":
binding += " lua_pushstring(L, %s(%s));\n" % (procedure, ", ".join(param["name"] for param in procedure_desc["params"]))
elif type(procedure_desc["return"]) is dict or procedure_desc["return"] in api["types"]:
# TODO: handle enums
type_desc = procedure_desc["return"] if type(procedure_desc["return"]) is dict else api["types"][procedure_desc["return"]]
binding += " %s result = %s(%s);\n" % (type_desc["c_type"], procedure, ", ".join(param["name"] for param in procedure_desc["params"]))
binding += to_table(type_desc, "result", 4)
else:
raise BaseException("Unhandled return type '%s'" % (procedure_desc["return"]))
binding += " return 1;\n}\n"
else:
binding += " %s(%s);\n" % (procedure, ", ".join(param["name"] for param in procedure_desc["params"]))
binding += " return 0;\n}\n"
bindings += [binding]
storages, converters, initializers, deinitializers = [], [], [], []
for typename, typedesc in api["types"].items():
for typename, typedesc in used_converters.items():
if "no_convert" in typedesc and typedesc["no_convert"]:
continue
converter = "static %s to_%s(lua_State *L, int idx) {\n" % (typename, typename.lower())
converter += " %s %s;\n" % (typename, typename.lower());
@ -87,63 +148,11 @@ for typename, typedesc in api["types"].items():
converter += " return %s;\n}\n" % (typename.lower())
converters += [converter]
print('\n'.join(storages))
print("void bindgen_init(void) {\n" + '\n'.join(initializers) + "\n}\n")
print('\n'.join(converters))
bindings = []
for procedure, procedure_desc in api["procedures"].items():
binding = "static int binding_%s(lua_State *L) {\n" % procedure
binding += " luaL_checktype(L, 1, LUA_TTABLE);\n"
if "params" in procedure_desc:
for parameter in procedure_desc["params"]:
basetype = parameter["type"].rsplit(' *', 1)[0]
if parameter["type"].endswith("*"):
binding += " %s %s_value;\n" % (basetype, parameter["name"])
binding += " %s %s;\n" % (parameter["type"], parameter["name"])
binding += " lua_getfield(L, 1, \"%s\");\n" % parameter["name"]
if "default" in parameter:
binding += " if (lua_isnoneornil(L, -1))\n"
binding += " %s = %s;\n" % (parameter["name"], default(parameter))
binding += " else\n "
if parameter["type"] == "float":
binding += " %s = (float)lua_tonumber(L, -1);\n" % (parameter["name"]);
elif parameter["type"] == "bool":
binding += " %s = lua_toboolean(L, -1);\n" % (parameter["name"]);
elif parameter["type"] == "char *":
binding += " %s = lua_tostring(L, -1);\n" % (parameter["name"]);
elif basetype in api["types"]:
if parameter["type"].endswith(" *"):
binding += " { %s_value = to_%s(L, -1); %s = &%s_value; }\n" % (parameter["name"], basetype.lower(), parameter["name"], parameter["name"]);
else:
binding += " %s = to_%s(L, -1);\n" % (parameter["name"], basetype.lower());
else:
raise BaseException("Unhandled parameter type '%s'" % (parameter["type"]))
if "return" in procedure_desc:
if procedure_desc["return"] == "bool":
binding += " lua_pushboolean(L, (int)%s(%s));\n" % (procedure, ", ".join(param["name"] for param in procedure_desc["params"]))
elif procedure_desc["return"] == "float":
binding += " lua_pushnumber(L, (double)%s(%s));\n" % (procedure, ", ".join(param["name"] for param in procedure_desc["params"]))
elif procedure_desc["return"] == "char *":
binding += " lua_pushstring(L, %s(%s));\n" % (procedure, ", ".join(param["name"] for param in procedure_desc["params"]))
elif type(procedure_desc["return"]) is dict or procedure_desc["return"] in api["types"]:
# TODO: handle enums
type_desc = procedure_desc["return"] if type(procedure_desc["return"]) is dict else api["types"][procedure_desc["return"]]
binding += " %s result = %s(%s);\n" % (type_desc["c_type"], procedure, ", ".join(param["name"] for param in procedure_desc["params"]))
binding += to_table(type_desc, "result", 4)
else:
raise BaseException("Unhandled return type '%s'" % (procedure_desc["return"]))
binding += " return 1;\n}\n"
else:
binding += " %s(%s);\n" % (procedure, ", ".join(param["name"] for param in procedure_desc["params"]))
binding += " return 0;\n}\n"
print(binding)
print('\n'.join(bindings))
loader = "void bindgen_load_%s(lua_State *L) {\n" % api["name"]
@ -157,11 +166,20 @@ for module in modules:
loader += " lua_setfield(L, -2, \"%s\");\n" % procedure_desc["symbol"]
loader += " lua_setglobal(L, \"%s\");\n" % module
loader += "}"
loader += "}\n"
print(loader)
unloader = "void bindgen_unload_%s(lua_State *L) {\n" % api["name"]
unloader += '\n'.join(deinitializers)
unloader += "}"
unloader += "}\n"
print(unloader)
# exceptions for the base townengine api
# TODO: is there a way to generalize it? or rather, is there any need to do so?
if api["name"] == "twn":
contexter = "void bindgen_build_context(lua_State *L) {\n"
contexter += to_table(api["types"]["Context"], "ctx", 4)
contexter += "}"
print(contexter)

4
apps/twnlua/game.c
View File

@ -13,6 +13,7 @@
/* generated by bindgen.py */
void bindgen_load_twn(lua_State *L);
void bindgen_unload_twn(lua_State *L);
void bindgen_build_context(lua_State *L);
/* require will go through physicsfs exclusively so that scripts can be in the data dir */
@ -110,6 +111,9 @@ void game_tick(void) {
State *state = ctx.udata;
bindgen_build_context(state->L);
lua_setglobal(state->L, "ctx");
lua_getglobal(state->L, "game_tick");
if (lua_pcall(state->L, 0, 0, 0) != LUA_OK) {
log_critical("%s", lua_tostring(state->L, -1));

14
share/twn_api.json
View File

@ -259,6 +259,20 @@
"c_type": "Rect"
},
"Context": {
"fields": [
{ "name": "frame_number", "type": "float" },
{ "name": "frame_duration", "type": "float" },
{ "name": "resolution", "type": "Vec2" },
{ "name": "mouse_position", "type": "Vec2" },
{ "name": "mouse_movement", "type": "Vec2" },
{ "name": "random_seed", "type": "float" },
{ "name": "debug", "type": "bool" },
{ "name": "initialization_needed", "type": "bool" }
],
"c_type": "Context"
},
"Control": {
"enums": {
"A": 4,