w_error.h

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#ifndef __W_ERROR_H
#define __W_ERROR_H
/*
 * (c) Copyright 2014, Hewlett-Packard Development Company, LP
 */

#define X(a, b)  a,

enum w_error_codes {
    w_error_ok = 0,

#include "w_error_xmacro.h"

    w_error_count
};
#undef X

// A bit tricky to get "a" from a in C macro.
#define X_QUOTE(str) #str
#define X_EXPAND_AND_QUOTE(str) X_QUOTE(str)
#define X(a, b) case a: return X_EXPAND_AND_QUOTE(a);

inline const char* w_error_name(w_error_codes error_code) {
    switch (error_code) {
        case w_error_ok:
            return "w_error_ok";
        case w_error_count:
            return "w_error_count";

#include "w_error_xmacro.h"
    }
    return "Unexpected error code";
};
#undef X
#undef X_EXPAND_AND_QUOTE
#undef X_QUOTE

#define X(a, b) case a: return b;

inline const char* w_error_message(w_error_codes error_code) {
    switch (error_code) {
        case w_error_ok:
            return "no_error";
        case w_error_count:
            return "error-count";

#include "w_error_xmacro.h"
    }
    return "Unexpected error code";
};
#undef X

#endif // __W_ERROR_H