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#include <emscripten/bind.h>
#include <../lib/libcxxabi/src/private_typeinfo.h>
#include <../lib/libcxxabi/include/cxxabi.h>
#include <list>
#include <vector>
#include <typeinfo>
#include <algorithm>
#include <emscripten/emscripten.h>
using namespace emscripten;
namespace __cxxabiv1 {
std::vector<const __class_type_info*> __getBaseClasses(const __class_type_info* cti) {
std::vector<const __class_type_info*> bases;
const __si_class_type_info* scti = dynamic_cast<const __si_class_type_info*>(cti);
if (scti) {
bases.emplace_back(scti->__base_type);
} else {
const __vmi_class_type_info* vcti = dynamic_cast<const __vmi_class_type_info*>(cti);
if (vcti) {
for (int i = 0; i < vcti->__base_count; i++) {
bases.emplace_back(vcti->__base_info[i].__base_type);
}
}
}
return bases;
}
int __getBaseOffset(const __class_type_info* ctiDv, const __class_type_info* ctiBs) {
int offset = 0;
const __vmi_class_type_info* vcti = dynamic_cast<const __vmi_class_type_info*>(ctiDv);
if (vcti) {
for (int i = 0; i < vcti->__base_count; i++) {
if (vcti->__base_info[i].__base_type == ctiBs) {
offset = vcti->__base_info[i].__offset_flags >> __base_class_type_info::__offset_shift;
break;
}
}
}
return offset;
}
void __getDerivationPaths(const __class_type_info* dv, const __class_type_info* bs, std::vector<const __class_type_info*>path, std::vector<std::vector<const __class_type_info*>>& paths) {
std::vector<const __class_type_info*> newPath(path);
newPath.emplace_back(dv);
if (dv == bs) {
paths.emplace_back(newPath);
} else {
std::vector<const __class_type_info*> bases = __getBaseClasses(dv);
for (int i = 0; i < bases.size(); i++) {
__getDerivationPaths(bases[i], bs, newPath, paths);
}
}
}
int __pathOffset(std::vector<const __cxxabiv1::__class_type_info*> path) {
int offset = 0;
for (int i = 0; i < path.size()-1; i++) {
offset += __getBaseOffset(path[i], path[i+1]);
}
return offset;
}
}
namespace emscripten {
namespace internal {
void registerStandardTypes() {
static bool first = true;
if (first) {
first = false;
_embind_register_void(TypeID<void>::get(), "void");
_embind_register_bool(TypeID<bool>::get(), "bool", true, false);
_embind_register_integer(TypeID<char>::get(), "char");
_embind_register_integer(TypeID<signed char>::get(), "signed char");
_embind_register_integer(TypeID<unsigned char>::get(), "unsigned char");
_embind_register_integer(TypeID<signed short>::get(), "short");
_embind_register_integer(TypeID<unsigned short>::get(), "unsigned short");
_embind_register_integer(TypeID<signed int>::get(), "int");
_embind_register_integer(TypeID<unsigned int>::get(), "unsigned int");
_embind_register_integer(TypeID<signed long>::get(), "long");
_embind_register_integer(TypeID<unsigned long>::get(), "unsigned long");
_embind_register_float(TypeID<float>::get(), "float");
_embind_register_float(TypeID<double>::get(), "double");
_embind_register_cstring(TypeID<std::string>::get(), "std::string");
_embind_register_emval(TypeID<val>::get(), "emscripten::val");
}
}
extern "C" {
// These three routines constitute an extension to the compiler's support for dynamic type conversion.
// They are used by embind.js to implement automatic downcasting of return values which are pointers to
// polymorphic objects.
// __getDerivationPath returns an array of type_info pointers describing the derivation chain starting with
// the derived type and proceeding toward (and ending with) the base type. Types are only included if they
// appear on all possible derivation paths.
std::vector<int> __getDerivationPath(int dv, const int bs) {
std::vector<std::vector<const __cxxabiv1::__class_type_info*>> paths;
const std::type_info* dv1 = (std::type_info*)dv;
const std::type_info* bs1 = (std::type_info*)bs;
const __cxxabiv1::__class_type_info* dv2 = dynamic_cast<const __cxxabiv1::__class_type_info*>(dv1);
const __cxxabiv1::__class_type_info* bs2 = dynamic_cast<const __cxxabiv1::__class_type_info*>(bs1);
if (dv2 && bs2) {
__cxxabiv1::__getDerivationPaths(dv2, bs2, std::vector<const __cxxabiv1::__class_type_info*>(), paths);
}
std::vector<int> derivationPath;
if (paths.size() > 0) {
for (int j = 0; j < paths[0].size(); j++) {
bool disqualified = false;
for (int i = 1; i < paths.size(); i++) {
bool found = false;
for (int j2 = 0; j2 < paths[i].size(); j2++) {
if (paths[i][j2] == paths[0][j]) {
found = true;
break;
}
}
if (!found) {
disqualified = true;
break;
}
}
if (!disqualified) {
derivationPath.emplace_back((int)paths[0][j]);
}
}
}
return derivationPath;
}
void* EMSCRIPTEN_KEEPALIVE __staticPointerCast(void* p, int from, int to) {
std::vector<std::vector<const __cxxabiv1::__class_type_info*>> paths;
int direction = 1;
const std::type_info* from1 = (std::type_info*)from;
const std::type_info* to1 = (std::type_info*)to;
const __cxxabiv1::__class_type_info* from2 = dynamic_cast<const __cxxabiv1::__class_type_info*>(from1);
const __cxxabiv1::__class_type_info* to2 = dynamic_cast<const __cxxabiv1::__class_type_info*>(to1);
if (from2 && to2) {
__cxxabiv1::__getDerivationPaths(from2, to2, std::vector<const __cxxabiv1::__class_type_info*>(), paths);
if (paths.size() == 0) {
__cxxabiv1::__getDerivationPaths(to2, from2, std::vector<const __cxxabiv1::__class_type_info*>(), paths);
direction = -1;
}
}
int offset = -1;
for (int i = 0; i < paths.size(); i++) {
if (offset < 0) {
offset = __cxxabiv1::__pathOffset(paths[i]);
} else {
if (offset != __cxxabiv1::__pathOffset(paths[i])) {
return (void *)-2;
}
}
}
if (offset < 0) {
return (void *)-1;
}
if (p == 0) {
return (void *)0;
}
return (void *)((int)p + offset * direction);
}
// __getDynamicPointerType returns (for polymorphic types only!) the type of the instance actually
// pointed to.
int EMSCRIPTEN_KEEPALIVE __getDynamicPointerType(int p) {
void** vtable = *(void***)p;
return (int)static_cast<const std::type_info*>(vtable[-1]);
}
// Calls to __dynamic_cast are generated by the compiler to implement dynamic_cast<>() -- its prototype is
// not available through any header file. It is called directly here because it allows run-time
// specification of the target pointer type (which can only be specified at compile time when using
// dynamic_cast<>().
void* __dynamic_cast(void*, const std::type_info*, const std::type_info*, int);
// __dynamicPointerCast performs a C++ dynamic_cast<>() operation, but allowing run-time specification of
// the from and to pointer types.
int EMSCRIPTEN_KEEPALIVE __dynamicPointer
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