error.h

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#ifndef CJOSE_ERROR_H
#define CJOSE_ERROR_H

#ifdef __cplusplus
extern "C" {
#endif

#if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6)
#define GCC_END_IGNORED_WARNING _Pragma("GCC diagnostic pop")

#define GCC_BEGIN_IGNORED_WARNING_ADDRESS \
    _Pragma("GCC diagnostic push");       \
    _Pragma("GCC diagnostic ignored \"-Waddress\"")
#define GCC_END_IGNORED_WARNING_ADDRESS GCC_END_IGNORED_WARNING
#else
#define GCC_BEGIN_IGNORED_WARNING_ADDRESS
#define GCC_END_IGNORED_WARNING_ADDRESS
#endif /* defined(__GNUC__) && (__GNUC__ > 3) && (__GNUC_MINOR__ > 5) */

typedef enum {
    CJOSE_ERR_NONE = 0,

    CJOSE_ERR_INVALID_ARG,

    CJOSE_ERR_INVALID_STATE,

    CJOSE_ERR_NO_MEMORY,

    CJOSE_ERR_CRYPTO,

} cjose_errcode;

typedef struct
{
    cjose_errcode code;

    const char *message;

    const char *function;

    const char *file;

    unsigned long line;

} cjose_err;

const char *cjose_err_message(cjose_errcode code);

#define CJOSE_ERROR(err, errcode)                      \
    GCC_BEGIN_IGNORED_WARNING_ADDRESS                  \
    if ((err) != NULL && (errcode) != CJOSE_ERR_NONE)  \
    {                                                  \
        (err)->code = (errcode);                       \
        (err)->message = cjose_err_message((errcode)); \
        (err)->function = __func__;                    \
        (err)->file = __FILE__;                        \
        (err)->line = __LINE__;                        \
    }                                                  \
    GCC_END_IGNORED_WARNING_ADDRESS

#ifdef __cplusplus
}
#endif

#endif /* CJOSE_ERROR_H */