1/* Compatibility functions for floating point formatting.
2 Copyright (C) 1995-2023 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
18
19#include <math.h>
20#include <stdio.h>
21#include <stdlib.h>
22#include <sys/param.h>
23#include <libc-lock.h>
24#include <math_ldbl_opt.h>
25#include <set-freeres.h>
26
27#ifndef SPRINTF
28# define SPRINTF sprintf
29#endif
30
31#define APPEND(a, b) APPEND2 (a, b)
32#define APPEND2(a, b) a##b
33
34
35#define FCVT_BUFFER APPEND (FUNC_PREFIX, fcvt_buffer)
36#define FCVT_BUFPTR APPEND (FUNC_PREFIX, fcvt_bufptr)
37#define ECVT_BUFFER APPEND (FUNC_PREFIX, ecvt_buffer)
38
39
40static char FCVT_BUFFER[MAXDIG];
41static char ECVT_BUFFER[MAXDIG];
42static char *FCVT_BUFPTR;
43
44char *
45__FCVT (FLOAT_TYPE value, int ndigit, int *decpt, int *sign)
46{
47 if (FCVT_BUFPTR == NULL)
48 {
49 if (__FCVT_R (value, ndigit, decpt, sign, FCVT_BUFFER, MAXDIG) != -1)
50 return FCVT_BUFFER;
51
52 FCVT_BUFPTR = (char *) malloc (FCVT_MAXDIG);
53 if (FCVT_BUFPTR == NULL)
54 return FCVT_BUFFER;
55 }
56
57 (void) __FCVT_R (value, ndigit, decpt, sign, FCVT_BUFPTR, FCVT_MAXDIG);
58
59 return FCVT_BUFPTR;
60}
61
62
63char *
64__ECVT (FLOAT_TYPE value, int ndigit, int *decpt, int *sign)
65{
66 (void) __ECVT_R (value, ndigit, decpt, sign, ECVT_BUFFER, MAXDIG);
67
68 return ECVT_BUFFER;
69}
70
71char *
72__GCVT (FLOAT_TYPE value, int ndigit, char *buf)
73{
74 SPRINTF (buf, "%.*" FLOAT_FMT_FLAG "g", MIN (ndigit, NDIGIT_MAX), value);
75 return buf;
76}
77
78weak_alias (FCVT_BUFPTR, __EFGCVT_FREEMEM_PTR);
79