proto = """#define GDVIRTUAL$VER($RET m_name $ARG)\\
StringName _gdvirtual_##m_name##_sn = #m_name;\\
mutable bool _gdvirtual_##m_name##_initialized = false;\\
mutable void *_gdvirtual_##m_name = nullptr;\\
_FORCE_INLINE_ bool _gdvirtual_##m_name##_call($CALLARGS) $CONST {\\
ScriptInstance *_script_instance = ((Object *)(this))->get_script_instance();\\
if (_script_instance) {\\
Callable::CallError ce;\\
$CALLSIARGS\\
$CALLSIBEGIN_script_instance->callp(_gdvirtual_##m_name##_sn, $CALLSIARGPASS, ce);\\
if (ce.error == Callable::CallError::CALL_OK) {\\
$CALLSIRET\\
return true;\\
}\\
}\\
if (unlikely(_get_extension() && !_gdvirtual_##m_name##_initialized)) {\\
_gdvirtual_##m_name = nullptr;\\
if (_get_extension()->get_virtual_call_data && _get_extension()->call_virtual_with_data) {\\
_gdvirtual_##m_name = _get_extension()->get_virtual_call_data(_get_extension()->class_userdata, &_gdvirtual_##m_name##_sn);\\
} else if (_get_extension()->get_virtual) {\\
_gdvirtual_##m_name = (void *)_get_extension()->get_virtual(_get_extension()->class_userdata, &_gdvirtual_##m_name##_sn);\\
}\\
GDVIRTUAL_TRACK(_gdvirtual_##m_name, _gdvirtual_##m_name##_initialized);\\
_gdvirtual_##m_name##_initialized = true;\\
}\\
if (_gdvirtual_##m_name) {\\
$CALLPTRARGS\\
$CALLPTRRETDEF\\
if (_get_extension()->get_virtual_call_data && _get_extension()->call_virtual_with_data) {\\
_get_extension()->call_virtual_with_data(_get_extension_instance(), &_gdvirtual_##m_name##_sn, _gdvirtual_##m_name, $CALLPTRARGPASS, $CALLPTRRETPASS);\\
$CALLPTRRET\\
} else {\\
((GDExtensionClassCallVirtual)_gdvirtual_##m_name)(_get_extension_instance(), $CALLPTRARGPASS, $CALLPTRRETPASS);\\
$CALLPTRRET\\
}\\
return true;\\
}\\
$REQCHECK\\
$RVOID\\
return false;\\
}\\
_FORCE_INLINE_ bool _gdvirtual_##m_name##_overridden() const {\\
ScriptInstance *_script_instance = ((Object *)(this))->get_script_instance();\\
if (_script_instance && _script_instance->has_method(_gdvirtual_##m_name##_sn)) {\\
return true;\\
}\\
if (unlikely(_get_extension() && !_gdvirtual_##m_name##_initialized)) {\\
_gdvirtual_##m_name = nullptr;\\
if (_get_extension()->get_virtual_call_data && _get_extension()->call_virtual_with_data) {\\
_gdvirtual_##m_name = _get_extension()->get_virtual_call_data(_get_extension()->class_userdata, &_gdvirtual_##m_name##_sn);\\
} else if (_get_extension()->get_virtual) {\\
_gdvirtual_##m_name = (void *)_get_extension()->get_virtual(_get_extension()->class_userdata, &_gdvirtual_##m_name##_sn);\\
}\\
GDVIRTUAL_TRACK(_gdvirtual_##m_name, _gdvirtual_##m_name##_initialized);\\
_gdvirtual_##m_name##_initialized = true;\\
}\\
if (_gdvirtual_##m_name) {\\
return true;\\
}\\
return false;\\
}\\
_FORCE_INLINE_ static MethodInfo _gdvirtual_##m_name##_get_method_info() {\\
MethodInfo method_info;\\
method_info.name = #m_name;\\
method_info.flags = $METHOD_FLAGS;\\
$FILL_METHOD_INFO\\
return method_info;\\
}
"""
def generate_version(argcount, const=False, returns=False, required=False):
s = proto
sproto = str(argcount)
method_info = ""
method_flags = "METHOD_FLAG_VIRTUAL"
if returns:
sproto += "R"
s = s.replace("$RET", "m_ret,")
s = s.replace("$RVOID", "(void)r_ret;") # If required, may lead to uninitialized errors
s = s.replace("$CALLPTRRETDEF", "PtrToArg<m_ret>::EncodeT ret;")
method_info += "method_info.return_val = GetTypeInfo<m_ret>::get_class_info();\\\n"
method_info += "\t\tmethod_info.return_val_metadata = GetTypeInfo<m_ret>::METADATA;"
else:
s = s.replace("$RET ", "")
s = s.replace("\t\t$RVOID\\\n", "")
s = s.replace("\t\t\t$CALLPTRRETDEF\\\n", "")
if const:
sproto += "C"
method_flags += " | METHOD_FLAG_CONST"
s = s.replace("$CONST", "const")
else:
s = s.replace("$CONST ", "")
if required:
sproto += "_REQUIRED"
method_flags += " | METHOD_FLAG_VIRTUAL_REQUIRED"
s = s.replace(
"$REQCHECK",
'ERR_PRINT_ONCE("Required virtual method " + get_class() + "::" + #m_name + " must be overridden before calling.");',
)
else:
s = s.replace("\t\t$REQCHECK\\\n", "")
s = s.replace("$METHOD_FLAGS", method_flags)
s = s.replace("$VER", sproto)
argtext = ""
callargtext = ""
callsiargs = ""
callsiargptrs = ""
callptrargsptr = ""
if argcount > 0:
argtext += ", "
callsiargs = f"Variant vargs[{argcount}] = {{ "
callsiargptrs = f"\t\t\tconst Variant *vargptrs[{argcount}] = {{ "
callptrargsptr = f"\t\t\tGDExtensionConstTypePtr argptrs[{argcount}] = {{ "
callptrargs = ""
for i in range(argcount):
if i > 0:
argtext += ", "
callargtext += ", "
callsiargs += ", "
callsiargptrs += ", "
callptrargs += "\t\t\t"
callptrargsptr += ", "
argtext += f"m_type{i + 1}"
callargtext += f"m_type{i + 1} arg{i + 1}"
callsiargs += f"Variant(arg{i + 1})"
callsiargptrs += f"&vargs[{i}]"
callptrargs += (
f"PtrToArg<m_type{i + 1}>::EncodeT argval{i + 1} = (PtrToArg<m_type{i + 1}>::EncodeT)arg{i + 1};\\\n"
)
callptrargsptr += f"&argval{i + 1}"
if method_info:
method_info += "\\\n\t\t"
method_info += f"method_info.arguments.push_back(GetTypeInfo<m_type{i + 1}>::get_class_info());\\\n"
method_info += f"\t\tmethod_info.arguments_metadata.push_back(GetTypeInfo<m_type{i + 1}>::METADATA);"
if argcount:
callsiargs += " };\\\n"
callsiargptrs += " };"
s = s.replace("$CALLSIARGS", callsiargs + callsiargptrs)
s = s.replace("$CALLSIARGPASS", f"(const Variant **)vargptrs, {argcount}")
callptrargsptr += " };"
s = s.replace("$CALLPTRARGS", callptrargs + callptrargsptr)
s = s.replace("$CALLPTRARGPASS", "reinterpret_cast<GDExtensionConstTypePtr *>(argptrs)")
else:
s = s.replace("\t\t\t$CALLSIARGS\\\n", "")
s = s.replace("$CALLSIARGPASS", "nullptr, 0")
s = s.replace("\t\t\t$CALLPTRARGS\\\n", "")
s = s.replace("$CALLPTRARGPASS", "nullptr")
if returns:
if argcount > 0:
callargtext += ", "
callargtext += "m_ret &r_ret"
s = s.replace("$CALLSIBEGIN", "Variant ret = ")
s = s.replace("$CALLSIRET", "r_ret = VariantCaster<m_ret>::cast(ret);")
s = s.replace("$CALLPTRRETPASS", "&ret")
s = s.replace("$CALLPTRRET", "r_ret = (m_ret)ret;")
else:
s = s.replace("$CALLSIBEGIN", "")
s = s.replace("\t\t\t\t$CALLSIRET\\\n", "")
s = s.replace("$CALLPTRRETPASS", "nullptr")
s = s.replace("\t\t\t\t$CALLPTRRET\\\n", "")
s = s.replace(" $ARG", argtext)
s = s.replace("$CALLARGS", callargtext)
if method_info:
s = s.replace("$FILL_METHOD_INFO", method_info)
else:
s = s.replace("\t\t$FILL_METHOD_INFO\\\n", method_info)
return s
def run(target, source, env):
max_versions = 12
txt = """/* THIS FILE IS GENERATED DO NOT EDIT */
#ifndef GDVIRTUAL_GEN_H
#define GDVIRTUAL_GEN_H
#include "core/object/script_instance.h"
#ifdef TOOLS_ENABLED
#define GDVIRTUAL_TRACK(m_virtual, m_initialized)\\
if (_get_extension()->reloadable) {\\
VirtualMethodTracker *tracker = memnew(VirtualMethodTracker);\\
tracker->method = (void **)&m_virtual;\\
tracker->initialized = &m_initialized;\\
tracker->next = virtual_method_list;\\
virtual_method_list = tracker;\\
}
#else
#define GDVIRTUAL_TRACK(m_virtual, m_initialized)
#endif
"""
for i in range(max_versions + 1):
txt += f"/* {i} Arguments */\n\n"
txt += generate_version(i, False, False)
txt += generate_version(i, False, True)
txt += generate_version(i, True, False)
txt += generate_version(i, True, True)
txt += generate_version(i, False, False, True)
txt += generate_version(i, False, True, True)
txt += generate_version(i, True, False, True)
txt += generate_version(i, True, True, True)
txt += "#endif // GDVIRTUAL_GEN_H\n"
with open(str(target[0]), "w", encoding="utf-8", newline="\n") as f:
f.write(txt)
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