demangle.cpp
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#include "crucible/core/demangle.inl"
#include <cstdlib>
#include "crucible/core/platform.hpp"
#ifdef CRUCIBLE_PLATFORM_IS_POSIX_LIKE
#include <cxxabi.h>
#endif // CRUCIBLE_PLATFORM_IS_POSIX_LIKE
namespace crucible::core
{
#ifdef CRUCIBLE_PLATFORM_IS_POSIX_LIKE
namespace
{
struct Demangler
{
char *data { nullptr };
std::size_t size { 0 };
int status { 0 };
explicit Demangler(Immutable_View<char> const &mangled);
~Demangler();
};
Demangler::Demangler(Immutable_View<char> const &mangled)
{
data = abi::__cxa_demangle(mangled.data(), nullptr, &size, &status);
}
Demangler::~Demangler()
{
if (data != nullptr) {
std::free(data);
}
data = nullptr;
size = 0;
status = 0;
}
}
#endif // CRUCIBLE_PLATFORM_IS_POSIX_LIKE
auto Insufficient_Demangle_Memory::describe() const -> String
{
return String { "Failed to allocate memory for symbol demangling" };
}
auto Invalid_Demangle_Arguments::describe() const -> String
{
return String { "Demangler called with invalid arguments" };
}
auto Unknown_Demangle_Error::describe() const -> String
{
return String { "Unknown demangler error" };
}
auto demangle(Immutable_View<char> const mangled) -> Demangle_Result<String>
{
#ifdef CRUCIBLE_PLATFORM_IS_POSIX_LIKE
Demangler const demangler { mangled };
if (demangler.status == 0) {
return make_success<String>(demangler.data, demangler.size);
}
if (demangler.status == -1) {
return make_failure<Demangle_Error>(Insufficient_Demangle_Memory {});
}
if (demangler.status == -2) {
return make_success<String>(mangled.data(), mangled.size());
}
if (demangler.status == -3) {
return make_failure<Demangle_Error>(Invalid_Demangle_Arguments {});
}
return make_failure<Demangle_Error>(Unknown_Demangle_Error {});
#endif // CRUCIBLE_PLATFORM_IS_POSIX_LIKE
#ifdef CRUCIBLE_PLATFORM_IS_WINDOWS_LIKE
// MSVC already gives us unmangled symbols from everywhere that matters
return make_success(make_string(mangled));
#endif // CRUCIBLE_PLATFORM_IS_WINDOWS_LIKE
}
}