/* __gmp_sprintf_funs -- support for gmp_sprintf and gmp_vsprintf.

   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 <stdlib.h>

#include <string.h>

#include "gmp.h"

#include "gmp-impl.h"

/* The data parameter "bufp" points to a "char *buf" which is the next

   character to be written, having started as the destination from the

   application.  This is then increased each time output is produced.  */

/* If vsprintf returns -1 then pass it upwards.  It doesn't matter that

   "*bufp" is ruined in this case, since gmp_doprint will bail out

   immediately anyway.  */

static int

gmp_sprintf_format (char **bufp, const char *fmt, va_list ap)

{

  char  *buf = *bufp;

  int   ret;

  vsprintf (buf, fmt, ap);

  ret = strlen (buf);

  *bufp = buf + ret;

  return ret;

}

static int

gmp_sprintf_memory (char **bufp, const char *str, size_t len)

{

  char  *buf = *bufp;

  *bufp = buf + len;

  memcpy (buf, str, len);

  return len;

}

static int

gmp_sprintf_reps (char **bufp, int c, int reps)

{

  char  *buf = *bufp;

  ASSERT (reps >= 0);

  *bufp = buf + reps;

  memset (buf, c, reps);

  return reps;

}

static int

gmp_sprintf_final (char **bufp)

{

  char  *buf = *bufp;

  *buf = '\0';

  return 0;

}

const struct doprnt_funs_t  __gmp_sprintf_funs = {

  (doprnt_format_t) gmp_sprintf_format,

  (doprnt_memory_t) gmp_sprintf_memory,

  (doprnt_reps_t)   gmp_sprintf_reps,

  (doprnt_final_t)  gmp_sprintf_final

};