/* __gmp_fprintf_funs -- support for formatted output to FILEs.

   THE FUNCTIONS IN THIS FILE ARE FOR INTERNAL USE ONLY.  THEY'RE ALMOST

   CERTAIN TO BE SUBJECT TO INCOMPATIBLE CHANGES OR DISAPPEAR COMPLETELY IN

   FUTURE GNU MP RELEASES.

Copyright 2001 Free Software Foundation, Inc.

This file is part of the GNU MP Library.

The GNU MP Library is free software; you can redistribute it and/or modify

it under the terms of either:

  * the GNU Lesser General Public License as published by the Free

    Software Foundation; either version 3 of the License, or (at your

    option) any later version.

or

  * the GNU General Public License as published by the Free Software

    Foundation; either version 2 of the License, or (at your option) any

    later version.

or both in parallel, as here.

The GNU MP Library 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.

You should have received copies of the GNU General Public License and the

GNU Lesser General Public License along with the GNU MP Library.  If not,

see https://www.gnu.org/licenses/.  */

#include <stdarg.h>

#include <stdio.h>

#include <string.h>

#include "gmp.h"

#include "gmp-impl.h"

/* SunOS 4 stdio.h doesn't provide a prototype for this */

#if ! HAVE_DECL_VFPRINTF

int vfprintf (FILE *, const char *, va_list);

#endif

static int

gmp_fprintf_memory (FILE *fp, const char *str, size_t len)

{

  return fwrite (str, 1, len, fp);

}

/* glibc putc is a function, at least when it's in multi-threaded mode or

   some such, so fwrite chunks instead of making many calls. */

static int

gmp_fprintf_reps (FILE *fp, int c, int reps)

{

  char  buf[256];

  int   i, piece, ret;

  ASSERT (reps >= 0);

  memset (buf, c, MIN (reps, sizeof (buf)));

  for (i = reps; i > 0; i -= sizeof (buf))

    {

      piece = MIN (i, sizeof (buf));

      ret = fwrite (buf, 1, piece, fp);

      if (ret == -1)

        return ret;

      ASSERT (ret == piece);

    }

  return reps;

}

const struct doprnt_funs_t  __gmp_fprintf_funs = {

  (doprnt_format_t) vfprintf,

  (doprnt_memory_t) gmp_fprintf_memory,

  (doprnt_reps_t)   gmp_fprintf_reps,

};