posix_errors.cpp
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#include "crucible/core/errors.hpp"
#include <cerrno>
#include <cstring>
namespace crucible
{
posix_error::posix_error(int const code) noexcept :
my_code { code }
{}
posix_error::posix_error() noexcept :
my_code { errno }
{}
auto posix_error::code() const noexcept -> int
{
return my_code;
}
auto posix_error::message() const -> string
{
// If `errno` happens to be 0, we override the default message because it sucks (usually
// something like `Unrecognized code (0)`)
if (my_code == 0)
{
return "no further information";
}
char const *description_data { std::strerror(my_code) };
std::size_t const description_size { std::strlen(description_data) };
return string { description_data, description_size };
}
// Errors arising from calling a POSIX API function
auto fstat_failed::describe() const -> string
{
return "::fstat() failed: " + posix_error::message();
}
auto mkdir_failed::describe() const -> string
{
return "::mkdir() failed: " + posix_error::message();
}
auto open_failed::describe() const -> string
{
return "::open() failed: " + posix_error::message();
}
auto opendir_failed::describe() const -> string
{
return "::opendir() failed: " + posix_error::message();
}
auto read_failed::describe() const -> string
{
return "::read() failed: " + posix_error::message();
}
auto readdir_failed::describe() const -> string
{
return "::readdir() failed: " + posix_error::message();
}
auto rmdir_failed::describe() const -> string
{
return "::rmdir() failed: " + posix_error::message();
}
auto stat_failed::describe() const -> string
{
return "::stat() failed: " + posix_error::message();
}
auto unlink_failed::describe() const -> string
{
return "::unlink() failed: " + posix_error::message();
}
auto write_failed::describe() const -> string
{
return "::write() failed: " + posix_error::message();
}
// Errors arising from a precondition or postcondition being violated
auto incomplete_read::describe() const -> string
{
return string { "fewer bytes than intended were read" };
}
auto incomplete_write::describe() const -> string
{
return string { "fewer bytes than intended were written" };
}
auto negative_file_size::describe() const -> string
{
return string { "file size was reported as a negative value" };
}
}