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/* Copyright (C) 2009, 2010
   Free Software Foundation, Inc.
   Contributed by Janne Blomqvist
 
This file is part of the GNU Fortran runtime library (libgfortran).
 
Libgfortran is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.
 
Libgfortran is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.
 
Under Section 7 of GPL version 3, you are granted additional
permissions described in the GCC Runtime Library Exception, version
3.1, as published by the Free Software Foundation.
 
You should have received a copy of the GNU General Public License and
a copy of the GCC Runtime Library Exception along with this program;
see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
<http://www.gnu.org/licenses/>.  */
 
#ifndef GFOR_UNIX_H
#define GFOR_UNIX_H
 
#include "io.h"
 
 
struct stream
{
  ssize_t (*read) (struct stream *, void *, ssize_t);
  ssize_t (*write) (struct stream *, const void *, ssize_t);
  gfc_offset (*seek) (struct stream *, gfc_offset, int);
  gfc_offset (*tell) (struct stream *);
  gfc_offset (*size) (struct stream *);
  /* Avoid keyword truncate due to AIX namespace collision.  */
  int (*trunc) (struct stream *, gfc_offset);
  int (*flush) (struct stream *);
  int (*close) (struct stream *);
};
 
 
/* Inline functions for doing file I/O given a stream.  */
static inline ssize_t
sread (stream * s, void * buf, ssize_t nbyte)
{
  return s->read (s, buf, nbyte);
}
 
static inline ssize_t
swrite (stream * s, const void * buf, ssize_t nbyte)
{
  return s->write (s, buf, nbyte);
}
 
static inline gfc_offset
sseek (stream * s, gfc_offset offset, int whence)
{
  return s->seek (s, offset, whence);
}
 
static inline gfc_offset
stell (stream * s)
{
  return s->tell (s);
}
 
static inline gfc_offset
ssize (stream * s)
{
  return s->size (s);
}
 
static inline int
struncate (stream * s, gfc_offset length)
{
  return s->trunc (s, length);
}
 
static inline int
sflush (stream * s)
{
  return s->flush (s);
}
 
static inline int
sclose (stream * s)
{
  return s->close (s);
}
 
 
extern int compare_files (stream *, stream *);
internal_proto(compare_files);
 
extern stream *open_external (st_parameter_open *, unit_flags *);
internal_proto(open_external);
 
extern stream *open_internal (char *, int, gfc_offset);
internal_proto(open_internal);
 
extern stream *open_internal4 (char *, int, gfc_offset);
internal_proto(open_internal4);
 
extern char * mem_alloc_w (stream *, int *);
internal_proto(mem_alloc_w);
 
extern char * mem_alloc_r (stream *, int *);
internal_proto(mem_alloc_r);
 
extern gfc_char4_t * mem_alloc_w4 (stream *, int *);
internal_proto(mem_alloc_w4);
 
extern char * mem_alloc_r4 (stream *, int *);
internal_proto(mem_alloc_r4);
 
extern stream *input_stream (void);
internal_proto(input_stream);
 
extern stream *output_stream (void);
internal_proto(output_stream);
 
extern stream *error_stream (void);
internal_proto(error_stream);
 
extern int compare_file_filename (gfc_unit *, const char *, int);
internal_proto(compare_file_filename);
 
extern gfc_unit *find_file (const char *file, gfc_charlen_type file_len);
internal_proto(find_file);
 
extern int delete_file (gfc_unit *);
internal_proto(delete_file);
 
extern int file_exists (const char *file, gfc_charlen_type file_len);
internal_proto(file_exists);
 
extern GFC_IO_INT file_size (const char *file, gfc_charlen_type file_len);
internal_proto(file_size);
 
extern const char *inquire_sequential (const char *, int);
internal_proto(inquire_sequential);
 
extern const char *inquire_direct (const char *, int);
internal_proto(inquire_direct);
 
extern const char *inquire_formatted (const char *, int);
internal_proto(inquire_formatted);
 
extern const char *inquire_unformatted (const char *, int);
internal_proto(inquire_unformatted);
 
extern const char *inquire_read (const char *, int);
internal_proto(inquire_read);
 
extern const char *inquire_write (const char *, int);
internal_proto(inquire_write);
 
extern const char *inquire_readwrite (const char *, int);
internal_proto(inquire_readwrite);
 
extern void flush_if_preconnected (stream *);
internal_proto(flush_if_preconnected);
 
extern int stream_isatty (stream *);
internal_proto(stream_isatty);
 
#ifndef TTY_NAME_MAX
#ifdef _POSIX_TTY_NAME_MAX
#define TTY_NAME_MAX _POSIX_TTY_NAME_MAX
#else
/* sysconf(_SC_TTY_NAME_MAX) = 32 which should be enough.  */
#define TTY_NAME_MAX 32
#endif
#endif
 
extern int stream_ttyname (stream *, char *, size_t);
internal_proto(stream_ttyname);
 
extern int unpack_filename (char *, const char *, int);
internal_proto(unpack_filename);
 
 
#endif