  /* A file descriptor as returned by open().      */
    GPGRT_SYSHD_SOCK = 2,  /* A socket as returned by socket().             */
    GPGRT_SYSHD_RVID = 3,  /* A rendezvous id (see libassuan's gpgcedev.c).  */
    GPGRT_SYSHD_HANDLE = 4 /* A HANDLE object (Windows).                    */
  };

struct _gpgrt_syshd
{
  enum gpgrt_syshd_types type;
  union {
    int fd;
    int sock;
    int rvid;
    void *handle;
  } u;
};
typedef struct _gpgrt_syshd gpgrt_syshd_t;
#ifdef GPGRT_ENABLE_ES_MACROS
typedef struct _gpgrt_syshd es_syshd_t;
#define ES_SYSHD_NONE   GPGRT_SYSHD_NONE
#define ES_SYSHD_FD     GPGRT_SYSHD_FD
#define ES_SYSHD_SOCK   GPGRT_SYSHD_SOCK
#define ES_SYSHD_RVID   GPGRT_SYSHD_RVID
#define ES_SYSHD_HANDLE GPGRT_SYSHD_HANDLE
#endif

/* The object used with gpgrt_poll.  */
struct _gpgrt_poll_s
{
  gpgrt_stream_t stream;
  unsigned int want_read:1;
  unsigned int want_write:1;
  unsigned int want_oob:1;
  unsigned int want_rdhup:1;
  unsigned int _reserv1:4;
  unsigned int got_read:1;
  unsigned int got_write:1;
  unsigned int got_oob:1;
  unsigned int got_rdhup:1;
  unsigned int _reserv2:4;
  unsigned int got_err:1;
  unsigned int got_hup:1;
  unsigned int got_nval:1;
  unsigned int _reserv3:4;
  unsigned int ignore:1;
  unsigned int user:8;       /* For application use.  */
};
typedef struct _gpgrt_poll_s gpgrt_poll_t;
#ifdef GPGRT_ENABLE_ES_MACROS
typedef struct _gpgrt_poll_s es_poll_t;
#endif

/* The type of the string filter function as used by fprintf_sf et al.  */
typedef char *(*gpgrt_string_filter_t) (const char *s, int n, void *opaque);



gpgrt_stream_t gpgrt_fopen (const char *_GPGRT__RESTRICT path,
                            const char *_GPGRT__RESTRICT mode);
gpgrt_stream_t gpgrt_mopen (void *_GPGRT__RESTRICT data,
                            size_t data_n, size_t data_len,
                            unsigned int grow,
                            void *(*func_realloc) (void *mem, size_t size),
                            void (*func_free) (void *mem),
                            const char *_GPGRT__RESTRICT mode);
gpgrt_stream_t gpgrt_fopenmem (size_t memlimit,
                               const char *_GPGRT__RESTRICT mode);
gpgrt_stream_t gpgrt_fopenmem_init (size_t memlimit,
                                    const char *_GPGRT__RESTRICT mode,
                                    const void *data, size_t datalen);
gpgrt_stream_t gpgrt_fdopen    (int filedes, const char *mode);
gpgrt_stream_t gpgrt_fdopen_nc (int filedes, const char *mode);
gpgrt_stream_t gpgrt_sysopen    (gpgrt_syshd_t *syshd, const char *mode);
gpgrt_stream_t gpgrt_sysopen_nc (gpgrt_syshd_t *syshd, const char *mode);
gpgrt_stream_t gpgrt_fpopen    (FILE *fp, const char *mode);
gpgrt_stream_t gpgrt_fpopen_nc (FILE *fp, const char *mode);
gpgrt_stream_t gpgrt_freopen (const char *_GPGRT__RESTRICT path,
                              const char *_GPGRT__RESTRICT mode,
                              gpgrt_stream_t _GPGRT__RESTRICT stream);
gpgrt_stream_t gpgrt_fopencookie (void *_GPGRT__RESTRICT cookie,
                                  const char *_GPGRT__RESTRICT mode,
                                  gpgrt_cookie_io_functions_t functions);
int gpgrt_fclose (gpgrt_stream_t stream);
int gpgrt_fcancel (gpgrt_stream_t stream);
int gpgrt_fclose_snatch (gpgrt_stream_t stream,
                         void **r_buffer, size_t *r_buflen);
int gpgrt_onclose (gpgrt_stream_t stream, int mode,
                   void (*fnc) (gpgrt_stream_t, void*), void *fnc_value);
int gpgrt_fileno (gpgrt_stream_t stream);
int gpgrt_fileno_unlocked (gpgrt_stream_t stream);
int gpgrt_syshd (gpgrt_stream_t stream, gpgrt_syshd_t *syshd);
int gpgrt_syshd_unlocked (gpgrt_stream_t stream, gpgrt_syshd_t *syshd);

void _gpgrt_set_std_fd (int no, int fd);
gpgrt_stream_t _gpgrt_get_std_stream (int fd);

#define gpgrt_stdin  _gpgrt_get_std_stream (0)
#define gpgrt_stdout _gpgrt_get_std_stream (1)
#define gpgrt_stderr _gpgrt_get_std_stream (2)


void gpgrt_flockfile (gpgrt_stream_t stream);
int  gpgrt_ftrylockfile (gpgrt_stream_t stream);
void gpgrt_funlockfile (gpgrt_stream_t stream);

int gpgrt_feof (gpgrt_stream_t stream);
int gpgrt_feof_unlocked (gpgrt_stream_t stream);
int gpgrt_ferror (gpgrt_stream_t stream);
int gpgrt_ferror_unlocked (gpgrt_stream_t stream);
void gpgrt_clearerr (gpgrt_stream_t stream);
void gpgrt_clearerr_unlocked (gpgrt_stream_t stream);

int _gpgrt_pending (gpgrt_stream_t stream);          /* (private) */
int _gpgrt_pending_unlocked (gpgrt_stream_t stream); /* (private) */

#define gpgrt_pending(stream) _gpgrt_pending (stream)

#define gpgrt_pending_unlocked(stream)				\
  (((!(stream)->flags.writing)					\
    && (((stream)->data_offset < (stream)->data_len)		\
        || ((stream)->unread_data_len)))                        \
   ? 1 : _gpgrt_pending_unlocked ((stream)))

int gpgrt_fflush (gpgrt_stream_t stream);
int gpgrt_fseek (gpgrt_stream_t stream, long int offset, int whence);
int gpgrt_fseeko (gpgrt_stream_t stream, gpgrt_off_t offset, int whence);
int gpgrt_ftruncate (gpgrt_stream_t stream, gpgrt_off_t length);
long int gpgrt_ftell (gpgrt_stream_t stream);
gpgrt_off_t gpgrt_ftello (gpgrt_stream_t stream);
void gpgrt_rewind (gpgrt_stream_t stream);

int gpgrt_fgetc (gpgrt_stream_t stream);
int gpgrt_fputc (int c, gpgrt_stream_t stream);

int _gpgrt_getc_underflow (gpgrt_stream_t stream);       /* (private) */
int _gpgrt_putc_overflow (int c, gpgrt_stream_t stream); /* (private) */

#define gpgrt_getc_unlocked(stream)				\
  (((!(stream)->flags.writing)					\
    && ((stream)->data_offset < (stream)->data_len)		\
    && (! (stream)->unread_data_len))				\
  ? ((int) (stream)->buffer[((stream)->data_offset)++])		\
  : _gpgrt_getc_underflow ((stream)))

#define gpgrt_putc_unlocked(c, stream)				\
  (((stream)->flags.writing					\
    && ((stream)->data_offset < (stream)->buffer_size)		\
    && (c != '\n'))						\
  ? ((int) ((stream)->buffer[((stream)->data_offset)++] = (c)))	\
  : _gpgrt_putc_overflow ((c), (stream)))

#define gpgrt_getc(stream)    gpgrt_fgetc (stream)
#define gpgrt_putc(c, stream) gpgrt_fputc (c, stream)

int gpgrt_ungetc (int c, gpgrt_stream_t stream);

int gpgrt_read (gpgrt_stream_t _GPGRT__RESTRICT stream,
                void *_GPGRT__RESTRICT buffer, size_t bytes_to_read,
                size_t *_GPGRT__RESTRICT bytes_read);
int gpgrt_write (gpgrt_stream_t _GPGRT__RESTRICT stream,
                 const void *_GPGRT__RESTRICT buffer, size_t bytes_to_write,
                 size_t *_GPGRT__RESTRICT bytes_written);
int gpgrt_write_sanitized (gpgrt_stream_t _GPGRT__RESTRICT stream,
                           const void *_GPGRT__RESTRICT buffer, size_t length,
                           const char *delimiters,
                           size_t *_GPGRT__RESTRICT bytes_written);
int gpgrt_write_hexstring (gpgrt_stream_t _GPGRT__RESTRICT stream,
                           const void *_GPGRT__RESTRICT buffer, size_t length,
                           int reserved,
                           size_t *_GPGRT__RESTRICT bytes_written);

size_t gpgrt_fread (void *_GPGRT__RESTRICT ptr, size_t size, size_t nitems,
                    gpgrt_stream_t _GPGRT__RESTRICT stream);
size_t gpgrt_fwrite (const void *_GPGRT__RESTRICT ptr, size_t size,
                     size_t nitems, gpgrt_stream_t _GPGRT__RESTRICT stream);

char *gpgrt_fgets (char *_GPGRT__RESTRICT s, int n,
                   gpgrt_stream_t _GPGRT__RESTRICT stream);
int gpgrt_fputs (const char *_GPGRT__RESTRICT s,
                 gpgrt_stream_t _GPGRT__RESTRICT stream);
int gpgrt_fputs_unlocked (const char *_GPGRT__RESTRICT s,
                          gpgrt_stream_t _GPGRT__RESTRICT stream);

ssize_t gpgrt_getline (char *_GPGRT__RESTRICT *_GPGRT__RESTRICT lineptr,
                       size_t *_GPGRT__RESTRICT n,
                       gpgrt_stream_t stream);
ssize_t gpgrt_read_line (gpgrt_stream_t stream,
                         char **addr_of_buffer, size_t *length_of_buffer,
                         size_t *max_length);

int gpgrt_fprintf (gpgrt_stream_t _GPGRT__RESTRICT stream,
                   const char *_GPGRT__RESTRICT format, ...)
                   GPGRT_ATTR_PRINTF(2,3);
int gpgrt_fprintf_unlocked (gpgrt_stream_t _GPGRT__RESTRICT stream,
                            const char *_GPGRT__RESTRICT format, ...)
                            GPGRT_ATTR_PRINTF(2,3);

int gpgrt_fprintf_sf (gpgrt_stream_t _GPGRT__RESTRICT stream,
                      gpgrt_string_filter_t sf, void *sfvalue,
                      const char *_GPGRT__RESTRICT format,
                      ...) GPGRT_ATTR_PRINTF(4,5);
int gpgrt_fprintf_sf_unlocked (gpgrt_stream_t _GPGRT__RESTRICT stream,
                               gpgrt_string_filter_t sf, void *sfvalue,
                               const char *_GPGRT__RESTRICT format,
                               ...) GPGRT_ATTR_PRINTF(4,5);

int gpgrt_printf (const char *_GPGRT__RESTRICT format, ...)
                  GPGRT_ATTR_PRINTF(1,2);
int gpgrt_printf_unlocked (const char *_GPGRT__RESTRICT format, ...)
                           GPGRT_ATTR_PRINTF(1,2);

int gpgrt_vfprintf (gpgrt_stream_t _GPGRT__RESTRICT stream,
                    const char *_GPGRT__RESTRICT format, va_list ap)
                    GPGRT_ATTR_PRINTF(2,0);
int gpgrt_vfprintf_unlocked (gpgrt_stream_t _GPGRT__RESTRICT stream,
                             const char *_GPGRT__RESTRICT format, va_list ap)
                             GPGRT_ATTR_PRINTF(2,0);

int gpgrt_setvbuf (gpgrt_stream_t _GPGRT__RESTRICT stream,
                   char *_GPGRT__RESTRICT buf, int mode, size_t size);
void gpgrt_setbuf (gpgrt_stream_t _GPGRT__RESTRICT stream,
                   char *_GPGRT__RESTRICT buf);

void gpgrt_set_binary (gpgrt_stream_t stream);
int  gpgrt_set_nonblock (gpgrt_stream_t stream, int onoff);
int  gpgrt_get_nonblock (gpgrt_stream_t stream);

int gpgrt_poll (gpgrt_poll_t *fdlist, unsigned int nfds, int timeout);

gpgrt_stream_t gpgrt_tmpfile (void);

void gpgrt_opaque_set (gpgrt_stream_t _GPGRT__RESTRICT stream,
                       void *_GPGRT__RESTRICT opaque);
void *gpgrt_opaque_get (gpgrt_stream_t stream);

void gpgrt_fname_set (gpgrt_stream_t stream, const char *fname);
const char *gpgrt_fname_get (gpgrt_stream_t stream);

int gpgrt_asprintf (char **r_buf, const char * _GPGRT__RESTRICT format, ...)
                    GPGRT_ATTR_PRINTF(2,3);
int gpgrt_vasprintf (char **r_buf, const char * _GPGRT__RESTRICT format,
                     va_list ap)
                     GPGRT_ATTR_PRINTF(2,0);
char *gpgrt_bsprintf (const char * _GPGRT__RESTRICT format, ...)
                      GPGRT_ATTR_PRINTF(1,2);
char *gpgrt_vbsprintf (const char * _GPGRT__RESTRICT format, va_list ap)
                       GPGRT_ATTR_PRINTF(1,0);
int gpgrt_snprintf (char *buf, size_t bufsize,
                    const char * _GPGRT__RESTRICT format, ...)
                    GPGRT_ATTR_PRINTF(3,4);
int gpgrt_vsnprintf (char *buf,size_t bufsize,
                     const char * _GPGRT__RESTRICT format, va_list arg_ptr)
                     GPGRT_ATTR_PRINTF(3,0);


#ifdef GPGRT_ENABLE_ES_MACROS
# define es_fopen             gpgrt_fopen
# define es_mopen             gpgrt_mopen
# define es_fopenmem          gpgrt_fopenmem
# define es_fopenmem_init     gpgrt_fopenmem_init
# define es_fdopen            gpgrt_fdopen
# define es_fdopen_nc         gpgrt_fdopen_nc
# define es_sysopen           gpgrt_sysopen
# define es_sysopen_nc        gpgrt_sysopen_nc
# define es_fpopen            gpgrt_fpopen
# define es_fpopen_nc         gpgrt_fpopen_nc
# define es_freopen           gpgrt_freopen
# define es_fopencookie       gpgrt_fopencookie
# define es_fclose            gpgrt_fclose
# define es_fclose_snatch     gpgrt_fclose_snatch
# define es_onclose           gpgrt_onclose
# define es_fileno            gpgrt_fileno
# define es_fileno_unlocked   gpgrt_fileno_unlocked
# define es_syshd             gpgrt_syshd
# define es_syshd_unlocked    gpgrt_syshd_unlocked
# define es_stdin             _gpgrt_get_std_stream (0)
# define es_stdout            _gpgrt_get_std_stream (1)
# define es_stderr            _gpgrt_get_std_stream (2)
# define es_flockfile         gpgrt_flockfile
# define es_ftrylockfile      gpgrt_ftrylockfile
# define es_funlockfile       gpgrt_funlockfile
# define es_feof              gpgrt_feof
# define es_feof_unlocked     gpgrt_feof_unlocked
# define es_ferror            gpgrt_ferror
# define es_ferror_unlocked   gpgrt_ferror_unlocked
# define es_clearerr          gpgrt_clearerr
# define es_clearerr_unlocked gpgrt_clearerr_unlocked
# define es_pending           gpgrt_pending
# define es_pending_unlocked  gpgrt_pending_unlocked
# define es_fflush            gpgrt_fflush
# define es_fseek             gpgrt_fseek
# define es_fseeko            gpgrt_fseeko
# define es_ftruncate         gpgrt_ftruncate
# define es_ftell             gpgrt_ftell
# define es_ftello            gpgrt_ftello
# define es_rewind            gpgrt_rewind
# define es_fgetc             gpgrt_fgetc
# define es_fputc             gpgrt_fputc
# define es_getc_unlocked     gpgrt_getc_unlocked
# define es_putc_unlocked     gpgrt_putc_unlocked
# define es_getc              gpgrt_getc
# define es_putc              gpgrt_putc
# define es_ungetc            gpgrt_ungetc
# define es_read              gpgrt_read
# define es_write             gpgrt_write
# define es_write_sanitized   gpgrt_write_sanitized
# define es_write_hexstring   gpgrt_write_hexstring
# define es_fread             gpgrt_fread
# define es_fwrite            gpgrt_fwrite
# define es_fgets             gpgrt_fgets
# define es_fputs             gpgrt_fputs
# define es_fputs_unlocked    gpgrt_fputs_unlocked
# define es_getline           gpgrt_getline
# define es_read_line         gpgrt_read_line
# define es_free              gpgrt_free
# define es_fprintf           gpgrt_fprintf
# define es_fprintf_unlocked  gpgrt_fprintf_unlocked
# define es_printf            gpgrt_printf
# define es_printf_unlocked   gpgrt_printf_unlocked
# define es_vfprintf          gpgrt_vfprintf
# define es_vfprintf_unlocked gpgrt_vfprintf_unlocked
# define es_setvbuf           gpgrt_setvbuf
# define es_setbuf            gpgrt_setbuf
# define es_set_binary        gpgrt_set_binary
# define es_set_nonblock      gpgrt_set_nonblock
# define es_get_nonblock      gpgrt_get_nonblock
# define es_poll              gpgrt_poll
# define es_tmpfile           gpgrt_tmpfile
# define es_opaque_set        gpgrt_opaque_set
# define es_opaque_get        gpgrt_opaque_get
# define es_fname_set         gpgrt_fname_set
# define es_fname_get         gpgrt_fname_get
# define es_asprintf          gpgrt_asprintf
# define es_vasprintf         gpgrt_vasprintf
# define es_bsprintf          gpgrt_bsprintf
# define es_vbsprintf         gpgrt_vbsprintf
#endif /*GPGRT_ENABLE_ES_MACROS*/


