errors.hpp

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#include "utility.hpp"
 
#ifndef _POWERDXX_ERRORS_HPP_
#define _POWERDXX_ERRORS_HPP_
 
namespace errors {
 
using namespace std::literals::string_literals;
 
enum class Exit : int {
    OK,           
    ECLARG,       
    EOUTOFRANGE,  
    ELOAD,        
    EFREQ,        
    EMODE,        
    EIVAL,        
    ESAMPLES,     
    ESYSCTL,      
    ENOFREQ,      
    ECONFLICT,    
    EPID,         
    EFORBIDDEN,   
    EDAEMON,      
    EWOPEN,       
    ESIGNAL,      
    ERANGEFMT,    
    ETEMPERATURE, 
    EEXCEPT,      
    EFILE,        
    EEXEC,        
    EDRIVER,      
    ESYSCTLNAME,  
    EFORMATFIELD, 
    LENGTH        
};
 
const char * const ExitStr[]{
    "OK", "ECLARG", "EOUTOFRANGE", "ELOAD", "EFREQ", "EMODE", "EIVAL",
    "ESAMPLES", "ESYSCTL", "ENOFREQ", "ECONFLICT", "EPID", "EFORBIDDEN",
    "EDAEMON", "EWOPEN", "ESIGNAL", "ERANGEFMT", "ETEMPERATURE",
    "EEXCEPT", "EFILE", "EEXEC", "EDRIVER", "ESYSCTLNAME", "EFORMATFIELD"
};
 
static_assert(size_t{utility::to_value(Exit::LENGTH)} == utility::countof(ExitStr),
              "Every Exit code must have a string representation");
 
struct Exception {
    Exit exitcode;
 
    int err;
 
    std::string msg;
};
 
[[noreturn]] inline void
fail(Exit const exitcode, int const err, std::string const & msg) {
    throw Exception{exitcode, err, "("s +
                                   ExitStr[utility::to_value(exitcode)] +
                                   ") " + msg};
}
 
} /* namespace errors */
 
#endif /* _POWERDXX_ERRORS_HPP_ */