int fsetpos_unlocked( FILE * stream, const fpos_t * pos ) _PDCLIB_nothrow;
long int ftell_unlocked( FILE * stream ) _PDCLIB_nothrow;
int fseek_unlocked( FILE * stream, long int offset, int whence ) _PDCLIB_nothrow;
int fsetpos_unlocked( FILE * stream, const fpos_t * pos ) _PDCLIB_nothrow;
long int ftell_unlocked( FILE * stream ) _PDCLIB_nothrow;
int fseek_unlocked( FILE * stream, long int offset, int whence ) _PDCLIB_nothrow;