24ms average on WINDOWS is wild
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22 changed files with 627 additions and 529 deletions
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#pragma once
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#include <format>
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#include <expected> // std::{unexpected, expected}
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#include <source_location> // std::source_location
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#include <system_error> // std::error_code
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@ -11,115 +11,146 @@
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#include "src/util/types.hpp"
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namespace util::error {
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using types::u8, types::i32, types::String, types::StringView, types::Exception;
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#include "include/matchit.h"
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/**
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* @enum DracErrorCode
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* @brief Error codes for general OS-level operations.
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*/
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enum class DracErrorCode : u8 {
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ApiUnavailable, ///< A required OS service/API is unavailable or failed unexpectedly at runtime.
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InternalError, ///< An error occurred within the application's OS abstraction code logic.
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InvalidArgument, ///< An invalid argument was passed to a function or method.
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IoError, ///< General I/O error (filesystem, pipes, etc.).
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NetworkError, ///< A network-related error occurred (e.g., DNS resolution, connection failure).
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NotFound, ///< A required resource (file, registry key, device, API endpoint) was not found.
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NotSupported, ///< The requested operation is not supported on this platform, version, or configuration.
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Other, ///< A generic or unclassified error originating from the OS or an external library.
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OutOfMemory, ///< The system ran out of memory or resources to complete the operation.
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ParseError, ///< Failed to parse data obtained from the OS (e.g., file content, API output).
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PermissionDenied, ///< Insufficient permissions to perform the operation.
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PlatformSpecific, ///< An unmapped error specific to the underlying OS platform occurred (check message).
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Timeout, ///< An operation timed out (e.g., waiting for IPC reply).
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};
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namespace util {
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namespace error {
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using types::u8, types::i32, types::String, types::StringView, types::Exception;
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/**
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* @struct DracError
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* @brief Holds structured information about an OS-level error.
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*
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* Used as the error type in Result for many os:: functions.
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*/
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struct DracError {
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// ReSharper disable CppDFANotInitializedField
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String message; ///< A descriptive error message, potentially including platform details.
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DracErrorCode code; ///< The general category of the error.
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std::source_location location; ///< The source location where the error occurred (file, line, function).
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// ReSharper restore CppDFANotInitializedField
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/**
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* @enum DracErrorCode
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* @brief Error codes for general OS-level operations.
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*/
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enum class DracErrorCode : u8 {
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ApiUnavailable, ///< A required OS service/API is unavailable or failed unexpectedly at runtime.
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InternalError, ///< An error occurred within the application's OS abstraction code logic.
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InvalidArgument, ///< An invalid argument was passed to a function or method.
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IoError, ///< General I/O error (filesystem, pipes, etc.).
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NetworkError, ///< A network-related error occurred (e.g., DNS resolution, connection failure).
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NotFound, ///< A required resource (file, registry key, device, API endpoint) was not found.
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NotSupported, ///< The requested operation is not supported on this platform, version, or configuration.
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Other, ///< A generic or unclassified error originating from the OS or an external library.
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OutOfMemory, ///< The system ran out of memory or resources to complete the operation.
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ParseError, ///< Failed to parse data obtained from the OS (e.g., file content, API output).
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PermissionDenied, ///< Insufficient permissions to perform the operation.
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PlatformSpecific, ///< An unmapped error specific to the underlying OS platform occurred (check message).
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Timeout, ///< An operation timed out (e.g., waiting for IPC reply).
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};
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DracError(const DracErrorCode errc, String msg, const std::source_location& loc = std::source_location::current())
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: message(std::move(msg)), code(errc), location(loc) {}
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/**
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* @struct DracError
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* @brief Holds structured information about an OS-level error.
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*
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* Used as the error type in Result for many os:: functions.
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*/
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struct DracError {
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// ReSharper disable CppDFANotInitializedField
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String message; ///< A descriptive error message, potentially including platform details.
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DracErrorCode code; ///< The general category of the error.
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std::source_location location; ///< The source location where the error occurred (file, line, function).
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// ReSharper restore CppDFANotInitializedField
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explicit DracError(const Exception& exc, const std::source_location& loc = std::source_location::current())
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: message(exc.what()), code(DracErrorCode::InternalError), location(loc) {}
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DracError(const DracErrorCode errc, String msg, const std::source_location& loc = std::source_location::current())
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: message(std::move(msg)), code(errc), location(loc) {}
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explicit DracError(const std::error_code& errc, const std::source_location& loc = std::source_location::current())
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: message(errc.message()), location(loc) {
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using enum DracErrorCode;
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using enum std::errc;
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explicit DracError(const Exception& exc, const std::source_location& loc = std::source_location::current())
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: message(exc.what()), code(DracErrorCode::InternalError), location(loc) {}
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switch (static_cast<std::errc>(errc.value())) {
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case permission_denied: code = PermissionDenied; break;
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case no_such_file_or_directory: code = NotFound; break;
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case timed_out: code = Timeout; break;
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case io_error: code = IoError; break;
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case network_unreachable:
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case network_down:
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case connection_refused: code = NetworkError; break;
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case not_supported: code = NotSupported; break;
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default: code = errc.category() == std::generic_category() ? InternalError : PlatformSpecific; break;
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explicit DracError(const std::error_code& errc, const std::source_location& loc = std::source_location::current())
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: message(errc.message()), location(loc) {
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using namespace matchit;
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using enum DracErrorCode;
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using enum std::errc;
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code = match(errc)(
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is | or_(file_too_large, io_error) = IoError,
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is | invalid_argument = InvalidArgument,
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is | not_enough_memory = OutOfMemory,
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is | or_(address_family_not_supported, operation_not_supported, not_supported) = NotSupported,
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is | or_(network_unreachable, network_down, connection_refused) = NetworkError,
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is | or_(no_such_file_or_directory, not_a_directory, is_a_directory, file_exists) = NotFound,
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is | permission_denied = PermissionDenied,
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is | timed_out = Timeout,
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is | _ = errc.category() == std::generic_category() ? InternalError : PlatformSpecific
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);
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}
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}
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#ifdef _WIN32
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explicit DracError(const winrt::hresult_error& e) : message(winrt::to_string(e.message())) {
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switch (e.code()) {
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case E_ACCESSDENIED: code = DracErrorCode::PermissionDenied; break;
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case HRESULT_FROM_WIN32(ERROR_FILE_NOT_FOUND):
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case HRESULT_FROM_WIN32(ERROR_PATH_NOT_FOUND):
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case HRESULT_FROM_WIN32(ERROR_SERVICE_NOT_FOUND): code = DracErrorCode::NotFound; break;
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case HRESULT_FROM_WIN32(ERROR_TIMEOUT):
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case HRESULT_FROM_WIN32(ERROR_SEM_TIMEOUT): code = DracErrorCode::Timeout; break;
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case HRESULT_FROM_WIN32(ERROR_NOT_SUPPORTED): code = DracErrorCode::NotSupported; break;
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default: code = DracErrorCode::PlatformSpecific; break;
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explicit DracError(const winrt::hresult_error& e) : message(winrt::to_string(e.message())) {
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using namespace matchit;
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using enum DracErrorCode;
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fn fromWin32 = [](const types::u32 x) -> HRESULT { return HRESULT_FROM_WIN32(x); };
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code = match(e.code())(
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is | or_(E_ACCESSDENIED, fromWin32(ERROR_ACCESS_DENIED)) = PermissionDenied,
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is | fromWin32(ERROR_FILE_NOT_FOUND) = NotFound,
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is | fromWin32(ERROR_PATH_NOT_FOUND) = NotFound,
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is | fromWin32(ERROR_SERVICE_NOT_FOUND) = NotFound,
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is | fromWin32(ERROR_TIMEOUT) = Timeout,
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is | fromWin32(ERROR_SEM_TIMEOUT) = Timeout,
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is | fromWin32(ERROR_NOT_SUPPORTED) = NotSupported,
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is | _ = PlatformSpecific
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);
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}
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}
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#else
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DracError(const DracErrorCode code_hint, const int errno_val)
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: message(std::system_category().message(errno_val)), code(code_hint) {
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using enum DracErrorCode;
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DracError(const DracErrorCode code_hint, const int errno_val)
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: message(std::system_category().message(errno_val)), code(code_hint) {
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using enum DracErrorCode;
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switch (errno_val) {
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case EACCES: code = PermissionDenied; break;
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case ENOENT: code = NotFound; break;
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case ETIMEDOUT: code = Timeout; break;
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case ENOTSUP: code = NotSupported; break;
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default: code = PlatformSpecific; break;
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}
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}
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static auto withErrno(const String& context, const std::source_location& loc = std::source_location::current())
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-> DracError {
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const i32 errNo = errno;
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const String msg = std::system_category().message(errNo);
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const String fullMsg = std::format("{}: {}", context, msg);
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const DracErrorCode code = [&errNo] {
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switch (errNo) {
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case EACCES:
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case EPERM: return DracErrorCode::PermissionDenied;
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case ENOENT: return DracErrorCode::NotFound;
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case ETIMEDOUT: return DracErrorCode::Timeout;
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case ENOTSUP: return DracErrorCode::NotSupported;
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case EIO: return DracErrorCode::IoError;
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case ECONNREFUSED:
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case ENETDOWN:
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case ENETUNREACH: return DracErrorCode::NetworkError;
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default: return DracErrorCode::PlatformSpecific;
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switch (errno_val) {
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case EACCES: code = PermissionDenied; break;
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case ENOENT: code = NotFound; break;
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case ETIMEDOUT: code = Timeout; break;
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case ENOTSUP: code = NotSupported; break;
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default: code = PlatformSpecific; break;
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}
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}();
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}
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return DracError { code, fullMsg, loc };
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}
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static auto withErrno(const String& context, const std::source_location& loc = std::source_location::current())
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-> DracError {
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const i32 errNo = errno;
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const String msg = std::system_category().message(errNo);
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const String fullMsg = std::format("{}: {}", context, msg);
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const DracErrorCode code = [&errNo] {
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switch (errNo) {
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case EACCES:
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case EPERM: return DracErrorCode::PermissionDenied;
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case ENOENT: return DracErrorCode::NotFound;
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case ETIMEDOUT: return DracErrorCode::Timeout;
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case ENOTSUP: return DracErrorCode::NotSupported;
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case EIO: return DracErrorCode::IoError;
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case ECONNREFUSED:
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case ENETDOWN:
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case ENETUNREACH: return DracErrorCode::NetworkError;
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default: return DracErrorCode::PlatformSpecific;
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}
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}();
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return DracError { code, fullMsg, loc };
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}
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#endif
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};
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} // namespace util::error
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};
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} // namespace error
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namespace types {
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/**
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* @typedef Result
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* @brief Alias for std::expected<Tp, Er>. Represents a value that can either be
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* a success value of type Tp or an error value of type Er.
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* @tparam Tp The type of the success value.
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* @tparam Er The type of the error value.
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*/
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template <typename Tp = void, typename Er = error::DracError>
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using Result = std::expected<Tp, Er>;
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/**
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* @typedef Err
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* @brief Alias for std::unexpected<Er>. Used to construct a Result in an error state.
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* @tparam Er The type of the error value.
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*/
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template <typename Er = error::DracError>
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using Err = std::unexpected<Er>;
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} // namespace types
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} // namespace util
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