errors.cpp
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#include "crucible/unix/errors.hpp"
#include <cerrno>
#include <cstring>
namespace crucible::unix::errors {
namespace {
struct DescribeUnixError final {
auto operator()(FstatFailed const &e) const -> std::string {
return "fstat() failed: " + e.host_error.describe();
}
auto operator()(MkdirFailed const &e) const -> std::string {
return "mkdir() failed: " + e.host_error.describe();
}
auto operator()(OpenFailed const &e) const -> std::string {
return "open() failed: " + e.host_error.describe();
}
auto operator()(OpendirFailed const &e) const -> std::string {
return "opendir() failed: " + e.host_error.describe();
}
auto operator()(ReadFailed const &e) const -> std::string {
return "read() failed: " + e.host_error.describe();
}
auto operator()(ReaddirFailed const &e) const -> std::string {
return "readdir() failed: " + e.host_error.describe();
}
auto operator()(RmdirFailed const &e) const -> std::string {
return "rmdir() failed: " + e.host_error.describe();
}
auto operator()(StatFailed const &e) const -> std::string {
return "stat() failed: " + e.host_error.describe();
}
auto operator()(UnlinkFailed const &e) const -> std::string {
return "unlink() failed: " + e.host_error.describe();
}
auto operator()(WriteFailed const &e) const -> std::string {
return "write() failed: " + e.host_error.describe();
}
auto operator()(IncompleteRead const &) const -> std::string {
return "Incomplete read";
}
auto operator()(IncompleteWrite const &) const -> std::string {
return "Incomplete write";
}
auto operator()(NegativeFileSize const &) const -> std::string {
return "Negative file size reported by the operating system";
}
};
struct FormatUnixError final {
auto operator()(FstatFailed const &e) const -> std::string {
return "FstatFailed { " + e.host_error.format() + " }";
}
auto operator()(MkdirFailed const &e) const -> std::string {
return "MkdirFailed { " + e.host_error.format() + " }";
}
auto operator()(OpenFailed const &e) const -> std::string {
return "OpenFailed { " + e.host_error.format() + " }";
}
auto operator()(OpendirFailed const &e) const -> std::string {
return "OpendirFailed { " + e.host_error.format() + " }";
}
auto operator()(ReadFailed const &e) const -> std::string {
return "ReadFailed { " + e.host_error.format() + " }";
}
auto operator()(ReaddirFailed const &e) const -> std::string {
return "ReaddirFailed { " + e.host_error.format() + " }";
}
auto operator()(RmdirFailed const &e) const -> std::string {
return "RmdirFailed { " + e.host_error.format() + " }";
}
auto operator()(StatFailed const &e) const -> std::string {
return "StatFailed { " + e.host_error.format() + " }";
}
auto operator()(UnlinkFailed const &e) const -> std::string {
return "UnlinkFailed { " + e.host_error.format() + " }";
}
auto operator()(WriteFailed const &e) const -> std::string {
return "WriteFailed { " + e.host_error.format() + " }";
}
auto operator()(IncompleteRead const &) const -> std::string {
return "IncompleteRead {}";
}
auto operator()(IncompleteWrite const &) const -> std::string {
return "IncompleteWrite {}";
}
auto operator()(NegativeFileSize const &) const -> std::string {
return "NegativeFileSize {}";
}
};
struct SourceUnixError final {
auto operator()(FstatFailed const &e) const -> std::optional<std::reference_wrapper<core::errors::AbstractError const>> {
return std::cref<core::errors::AbstractError>(e.host_error);
}
auto operator()(MkdirFailed const &e) const -> std::optional<std::reference_wrapper<core::errors::AbstractError const>> {
return std::cref<core::errors::AbstractError>(e.host_error);
}
auto operator()(OpenFailed const &e) const -> std::optional<std::reference_wrapper<core::errors::AbstractError const>> {
return std::cref<core::errors::AbstractError>(e.host_error);
}
auto operator()(OpendirFailed const &e) const -> std::optional<std::reference_wrapper<core::errors::AbstractError const>> {
return std::cref<core::errors::AbstractError>(e.host_error);
}
auto operator()(ReadFailed const &e) const -> std::optional<std::reference_wrapper<core::errors::AbstractError const>> {
return std::cref<core::errors::AbstractError>(e.host_error);
}
auto operator()(ReaddirFailed const &e) const -> std::optional<std::reference_wrapper<core::errors::AbstractError const>> {
return std::cref<core::errors::AbstractError>(e.host_error);
}
auto operator()(RmdirFailed const &e) const -> std::optional<std::reference_wrapper<core::errors::AbstractError const>> {
return std::cref<core::errors::AbstractError>(e.host_error);
}
auto operator()(StatFailed const &e) const -> std::optional<std::reference_wrapper<core::errors::AbstractError const>> {
return std::cref<core::errors::AbstractError>(e.host_error);
}
auto operator()(UnlinkFailed const &e) const -> std::optional<std::reference_wrapper<core::errors::AbstractError const>> {
return std::cref<core::errors::AbstractError>(e.host_error);
}
auto operator()(WriteFailed const &e) const -> std::optional<std::reference_wrapper<core::errors::AbstractError const>> {
return std::cref<core::errors::AbstractError>(e.host_error);
}
auto operator()(IncompleteRead const &) const -> std::optional<std::reference_wrapper<core::errors::AbstractError const>> {
return std::nullopt;
}
auto operator()(IncompleteWrite 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;
}
};
}
HostError::HostError() :
my_error_code { errno } {
}
HostError::~HostError() = default;
auto HostError::describe() const -> std::string {
return std::strerror(my_error_code);
}
auto HostError::format() const -> std::string {
using namespace std::string_literals;
return "HostError { \""s + std::strerror(my_error_code) + "\" }";
}
auto HostError::source() const & -> std::optional<std::reference_wrapper<core::errors::AbstractError const>> {
return std::nullopt;
}
UnixError::UnixError(FstatFailed const &variant) :
my_variant { variant } {
}
UnixError::UnixError(MkdirFailed const &variant) :
my_variant { variant } {
}
UnixError::UnixError(OpenFailed const &variant) :
my_variant { variant } {
}
UnixError::UnixError(OpendirFailed const &variant) :
my_variant { variant } {
}
UnixError::UnixError(ReadFailed const &variant) :
my_variant { variant } {
}
UnixError::UnixError(ReaddirFailed const &variant) :
my_variant { variant } {
}
UnixError::UnixError(RmdirFailed const &variant) :
my_variant { variant } {
}
UnixError::UnixError(StatFailed const &variant) :
my_variant { variant } {
}
UnixError::UnixError(UnlinkFailed const &variant) :
my_variant { variant } {
}
UnixError::UnixError(WriteFailed const &variant) :
my_variant { variant } {
}
UnixError::UnixError(IncompleteRead const &variant) :
my_variant { variant } {
}
UnixError::UnixError(IncompleteWrite const &variant) :
my_variant { variant } {
}
UnixError::UnixError(NegativeFileSize const &variant) :
my_variant { variant } {
}
UnixError::~UnixError() = default;
auto UnixError::describe() const -> std::string {
return std::visit(DescribeUnixError {}, my_variant);
}
auto UnixError::format() const -> std::string {
return "UnixError { " + std::visit(FormatUnixError {}, my_variant) + " }";
}
auto UnixError::source() const & -> std::optional<std::reference_wrapper<core::errors::AbstractError const>> {
return std::visit(SourceUnixError {}, my_variant);
}
}