/*
 * Copyright 2009, Ingo Weinhold, ingo_weinhold@gmx.de.
 * Distributed under the terms of the MIT License.
 */

#include <stdio.h>
#include <string.h>

#include "posix_error_mapper.h"


static int*
real_errnop()
{
        GET_REAL_FUNCTION(int*, _errnop, (void));
        return sReal__errnop();
}


int*
_errnop(void)
{
        HIDDEN_FUNCTION(_errnop);

        // convert errno to positive error code
        int* error = real_errnop();
        if (*error < 0)
                *error = B_TO_POSITIVE_ERROR(*error);
        return error;
}



WRAPPER_FUNCTION(char*, strerror, (int errorCode),
        return sReal_strerror(B_TO_NEGATIVE_ERROR(errorCode));
)


WRAPPER_FUNCTION(int, strerror_r,
                (int errorCode, char* buffer, size_t bufferSize),
        return sReal_strerror_r(B_TO_NEGATIVE_ERROR(errorCode), buffer, bufferSize);
)


WRAPPER_FUNCTION(void, perror, (const char* errorPrefix),
        // convert errno to negative error code
        int* error = real_errnop();
        int oldError = *error;
        if (*error > 0)
                *error = B_TO_NEGATIVE_ERROR(*error);

        // call the real perror()
        sReal_perror(errorPrefix);

        // reset errno
        *error = oldError;
)