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/* Compatibility functions for floating point formatting.
Copyright (C) 1995, 1996, 1997 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include <stdio.h>
#include <stdlib.h>
#include <float.h>
#include <bits/libc-lock.h>
#ifndef FLOAT_TYPE
# define FLOAT_TYPE double
# define FUNC_PREFIX
# define FLOAT_FMT_FLAG
/* Actually we have to write (DBL_DIG + log10 (DBL_MAX_10_EXP)) but we
don't have log10 available in the preprocessor. */
# define MAXDIG (DBL_DIG + 3)
#endif
#define APPEND(a, b) APPEND2 (a, b)
#define APPEND2(a, b) a##b
#define FCVT_BUFFER APPEND (FUNC_PREFIX, fcvt_buffer)
#define ECVT_BUFFER APPEND (FUNC_PREFIX, ecvt_buffer)
static char *FCVT_BUFFER;
static char *ECVT_BUFFER;
static void
APPEND (FUNC_PREFIX, fcvt_allocate) (void)
{
FCVT_BUFFER = (char *) malloc (MAXDIG);
}
char *
APPEND (FUNC_PREFIX, fcvt) (value, ndigit, decpt, sign)
FLOAT_TYPE value;
int ndigit, *decpt, *sign;
{
__libc_once_define (static, once);
__libc_once (once, APPEND (FUNC_PREFIX, fcvt_allocate));
if (FCVT_BUFFER == NULL)
/* If no core is available we don't have a chance to run the
program successfully and so returning NULL is an acceptable
result. */
return NULL;
(void) APPEND (FUNC_PREFIX, fcvt_r) (value, ndigit, decpt, sign,
FCVT_BUFFER, MAXDIG);
return FCVT_BUFFER;
}
static void
APPEND (FUNC_PREFIX, ecvt_allocate) (void)
{
ECVT_BUFFER = (char *) malloc (MAXDIG);
}
char *
APPEND (FUNC_PREFIX, ecvt) (value, ndigit, decpt, sign)
FLOAT_TYPE value;
int ndigit, *decpt, *sign;
{
__libc_once_define (static, once);
__libc_once (once, APPEND (FUNC_PREFIX, ecvt_allocate));
if (ECVT_BUFFER == NULL)
/* If no core is available we don't have a chance to run the
program successfully and so returning NULL is an acceptable
result. */
return NULL;
(void) APPEND (FUNC_PREFIX, ecvt_r) (value, ndigit, decpt, sign,
ECVT_BUFFER, MAXDIG);
return ECVT_BUFFER;
}
char *
APPEND (FUNC_PREFIX, gcvt) (value, ndigit, buf)
FLOAT_TYPE value;
int ndigit;
char *buf;
{
sprintf (buf, "%.*" FLOAT_FMT_FLAG "g", ndigit, value);
return buf;
}
/* Make sure the memory is freed if the programs ends while in
memory-debugging mode and something actually was allocated. */
static void
__attribute__ ((unused))
free_mem (void)
{
if (FCVT_BUFFER != NULL)
free (FCVT_BUFFER);
if (ECVT_BUFFER != NULL)
free (ECVT_BUFFER);
}
text_set_element (__libc_subfreeres, free_mem);
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