errors.cpp
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#include "crucible/windows/errors.hpp"
#include "crucible/core/resource_warden.inl"
#include "crucible/windows/transcoding.hpp"
#include <Windows.h>
#include <type_traits>
static_assert(sizeof(::DWORD) <= sizeof(std::uint32_t));
static_assert(std::is_unsigned_v<::DWORD> == std::is_unsigned_v<std::uint32_t>);
namespace crucible::windows::errors {
namespace {
struct DescribeWindowsError final {
auto operator()(CreateDirectoryWFailed const &e) const -> std::string {
return "CreateDirectoryW() failed: " + e.host_error.describe();
}
auto operator()(CreateFileWFailed const &e) const -> std::string {
return "CreateFileW() failed: " + e.host_error.describe();
}
auto operator()(GetFileAttributesWFailed const &e) const -> std::string {
return "GetFileAttributesW() failed: " + e.host_error.describe();
}
auto operator()(GetFileSizeExFailed const &e) const -> std::string {
return "GetFileSizeEx() failed: " + e.host_error.describe();
}
auto operator()(FindFirstFileWFailed const &e) const -> std::string {
return "FindFirstFileW() failed: " + e.host_error.describe();
}
auto operator()(FindNextFileWFailed const &e) const -> std::string {
return "FindNextFileW() failed: " + e.host_error.describe();
}
auto operator()(MultiByteToWideCharFailed const &e) const -> std::string {
return "MultiByteToWideChar() failed: " + e.host_error.describe();
}
auto operator()(ReadFileFailed const &e) const -> std::string {
return "ReadFile() failed: " + e.host_error.describe();
}
auto operator()(RemoveDirectoryWFailed const &e) const -> std::string {
return "RemoveDirectoryW() failed: " + e.host_error.describe();
}
auto operator()(DeleteFileWFailed const &e) const -> std::string {
return "DeleteFileW() failed: " + e.host_error.describe();
}
auto operator()(WideCharToMultiByteFailed const &e) const -> std::string {
return "WideCharToMultiByte() failed: " + e.host_error.describe();
}
auto operator()(WriteFileFailed const &e) const -> std::string {
return "WriteFile() failed: " + e.host_error.describe();
}
auto operator()(InputTooLarge const &) const -> std::string {
return "Input was too large to transcode";
}
auto operator()(NegativeFileSize const &) const -> std::string {
return "The system reported a negative file size";
}
auto operator()(OutputTruncated const &) const -> std::string {
return "Output of transcoder was truncated";
}
};
struct FormatWindowsError final {
auto operator()(CreateDirectoryWFailed const &e) const -> std::string {
return "CreateDirectoryWFailed { " + e.host_error.format() + " }";
}
auto operator()(CreateFileWFailed const &e) const -> std::string {
return "CreateFileWFailed { " + e.host_error.format() + " }";
}
auto operator()(GetFileAttributesWFailed const &e) const -> std::string {
return "GetFileAttributesWFailed { " + e.host_error.format() + " }";
}
auto operator()(GetFileSizeExFailed const &e) const -> std::string {
return "GetFileSizeExFailed { " + e.host_error.format() + " }";
}
auto operator()(FindFirstFileWFailed const &e) const -> std::string {
return "FindFirstFileWFailed { " + e.host_error.format() + " }";
}
auto operator()(FindNextFileWFailed const &e) const -> std::string {
return "FindNextFileWFailed { " + e.host_error.format() + " }";
}
auto operator()(MultiByteToWideCharFailed const &e) const -> std::string {
return "MultiByteToWideCharFailed { " + e.host_error.format() + " }";
}
auto operator()(ReadFileFailed const &e) const -> std::string {
return "ReadFileFailed { " + e.host_error.format() + " }";
}
auto operator()(RemoveDirectoryWFailed const &e) const -> std::string {
return "RemoveDirectoryWFailed { " + e.host_error.format() + " }";
}
auto operator()(DeleteFileWFailed const &e) const -> std::string {
return "DeleteFileWFailed { " + e.host_error.format() + " }";
}
auto operator()(WideCharToMultiByteFailed const &e) const -> std::string {
return "WideCharToMultiByteFailed { " + e.host_error.format() + " }";
}
auto operator()(WriteFileFailed const &e) const -> std::string {
return "WriteFileFailed { " + e.host_error.format() + " }";
}
auto operator()(InputTooLarge const &) const -> std::string {
return "InputTooLarge {}";
}
auto operator()(NegativeFileSize const &) const -> std::string {
return "NegativeFileSize {}";
}
auto operator()(OutputTruncated const &) const -> std::string {
return "OutputTruncated {}";
}
};
struct SourceWindowsError final {
auto operator()(CreateDirectoryWFailed const &e) const -> std::optional<std::reference_wrapper<core::errors::AbstractError const>> {
return std::cref<core::errors::AbstractError>(e.host_error);
}
auto operator()(CreateFileWFailed const &e) const -> std::optional<std::reference_wrapper<core::errors::AbstractError const>> {
return std::cref<core::errors::AbstractError>(e.host_error);
}
auto operator()(GetFileAttributesWFailed const &e) const -> std::optional<std::reference_wrapper<core::errors::AbstractError const>> {
return std::cref<core::errors::AbstractError>(e.host_error);
}
auto operator()(GetFileSizeExFailed const &e) const -> std::optional<std::reference_wrapper<core::errors::AbstractError const>> {
return std::cref<core::errors::AbstractError>(e.host_error);
}
auto operator()(FindFirstFileWFailed const &e) const -> std::optional<std::reference_wrapper<core::errors::AbstractError const>> {
return std::cref<core::errors::AbstractError>(e.host_error);
}
auto operator()(FindNextFileWFailed const &e) const -> std::optional<std::reference_wrapper<core::errors::AbstractError const>> {
return std::cref<core::errors::AbstractError>(e.host_error);
}
auto operator()(MultiByteToWideCharFailed const &e) const -> std::optional<std::reference_wrapper<core::errors::AbstractError const>> {
return std::cref<core::errors::AbstractError>(e.host_error);
}
auto operator()(ReadFileFailed const &e) const -> std::optional<std::reference_wrapper<core::errors::AbstractError const>> {
return std::cref<core::errors::AbstractError>(e.host_error);
}
auto operator()(RemoveDirectoryWFailed const &e) const -> std::optional<std::reference_wrapper<core::errors::AbstractError const>> {
return std::cref<core::errors::AbstractError>(e.host_error);
}
auto operator()(DeleteFileWFailed const &e) const -> std::optional<std::reference_wrapper<core::errors::AbstractError const>> {
return std::cref<core::errors::AbstractError>(e.host_error);
}
auto operator()(WideCharToMultiByteFailed const &e) const -> std::optional<std::reference_wrapper<core::errors::AbstractError const>> {
return std::cref<core::errors::AbstractError>(e.host_error);
}
auto operator()(WriteFileFailed const &e) const -> std::optional<std::reference_wrapper<core::errors::AbstractError const>> {
return std::cref<core::errors::AbstractError>(e.host_error);
}
auto operator()(InputTooLarge const &) const -> std::optional<std::reference_wrapper<core::errors::AbstractError const>> {
return std::nullopt;
}
auto operator()(NegativeFileSize const &) const -> std::optional<std::reference_wrapper<core::errors::AbstractError const>> {
return std::nullopt;
}
auto operator()(OutputTruncated const &) const -> std::optional<std::reference_wrapper<core::errors::AbstractError const>> {
return std::nullopt;
}
};
template<typename T>
struct LocalFreeAdapter final {
static_assert(std::is_pointer_v<T>);
auto operator()(T pointer) const -> void {
::LocalFree(pointer);
}
};
template<typename T>
using LocalAllocWarden = core::resource_warden::ResourceWarden<T, LocalFreeAdapter<T>>;
auto get_host_error_code() -> std::uint32_t {
::DWORD const error_dword { ::GetLastError() };
return static_cast<std::uint32_t>(error_dword);
}
}
HostError::HostError() :
my_error_code { get_host_error_code() } {
}
HostError::~HostError() = default;
auto HostError::describe() const -> std::string {
return format_error_code();
}
auto HostError::format() const -> std::string {
return "HostError { \"" + format_error_code() + "\" }";
}
auto HostError::source() const & -> std::optional<std::reference_wrapper<core::errors::AbstractError const>> {
return std::nullopt;
}
auto HostError::format_error_code() const -> std::string {
constexpr ::DWORD FLAGS { FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS | FORMAT_MESSAGE_MAX_WIDTH_MASK };
constexpr ::DWORD LANGUAGE_ID { 0 };
constexpr ::DWORD MINIMUM_SIZE { 0 };
::LPVOID message_source { nullptr };
auto const error_dword { static_cast<::DWORD>(my_error_code) };
::LPWSTR raw_utf16_message { nullptr };
auto dont_blame_me_blame_microsoft { reinterpret_cast<::LPWSTR>(&raw_utf16_message) };
::va_list *arguments { nullptr };
::DWORD const characters_written { ::FormatMessageW(FLAGS, message_source, error_dword, LANGUAGE_ID, dont_blame_me_blame_microsoft, MINIMUM_SIZE, arguments) };
if (characters_written == 0) {
return "<failed to format message for Windows API error code `" + std::to_string(my_error_code) + "`>";
}
LocalAllocWarden<::LPWSTR> warden(raw_utf16_message);
::DWORD const characters_written_excluding_terminator { characters_written - 1 };
std::wstring const utf16_message(raw_utf16_message, characters_written_excluding_terminator);
auto const transcoding_result { transcoding::transcode_utf16_to_utf8(utf16_message) };
if (transcoding_result.has_lhs()) {
return "<failed to transcode message for Windows API error code `" + std::to_string(my_error_code) + "`>";
}
return transcoding_result.get_rhs();
}
WindowsError::WindowsError(CreateDirectoryWFailed const &variant) :
my_variant { variant } {
}
WindowsError::WindowsError(CreateFileWFailed const &variant) :
my_variant { variant } {
}
WindowsError::WindowsError(GetFileAttributesWFailed const &variant) :
my_variant { variant } {
}
WindowsError::WindowsError(GetFileSizeExFailed const &variant) :
my_variant { variant } {
}
WindowsError::WindowsError(FindFirstFileWFailed const &variant) :
my_variant { variant } {
}
WindowsError::WindowsError(FindNextFileWFailed const &variant) :
my_variant { variant } {
}
WindowsError::WindowsError(MultiByteToWideCharFailed const &variant) :
my_variant { variant } {
}
WindowsError::WindowsError(ReadFileFailed const &variant) :
my_variant { variant } {
}
WindowsError::WindowsError(RemoveDirectoryWFailed const &variant) :
my_variant { variant } {
}
WindowsError::WindowsError(DeleteFileWFailed const &variant) :
my_variant { variant } {
}
WindowsError::WindowsError(WideCharToMultiByteFailed const &variant) :
my_variant { variant } {
}
WindowsError::WindowsError(WriteFileFailed const &variant) :
my_variant { variant } {
}
WindowsError::WindowsError(InputTooLarge const &variant) :
my_variant { variant } {
}
WindowsError::WindowsError(NegativeFileSize const &variant) :
my_variant { variant } {
}
WindowsError::WindowsError(OutputTruncated const &variant) :
my_variant { variant } {
}
WindowsError::~WindowsError() = default;
auto WindowsError::describe() const -> std::string {
return std::visit(DescribeWindowsError {}, my_variant);
}
auto WindowsError::format() const -> std::string {
return "WindowsError { " + std::visit(FormatWindowsError {}, my_variant) + " }";
}
auto WindowsError::source() const & -> std::optional<std::reference_wrapper<core::errors::AbstractError const>> {
return std::visit(SourceWindowsError {}, my_variant);
}
}