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.
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.
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.
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/>. */
22 #include <sys/param.h>
23 #include <libc-lock.h>
24 #include <math_ldbl_opt.h>
27 # define SPRINTF sprintf
30 #define APPEND(a, b) APPEND2 (a, b)
31 #define APPEND2(a, b) a##b
34 #define FCVT_BUFFER APPEND (FUNC_PREFIX, fcvt_buffer)
35 #define FCVT_BUFPTR APPEND (FUNC_PREFIX, fcvt_bufptr)
36 #define ECVT_BUFFER APPEND (FUNC_PREFIX, ecvt_buffer)
39 static char FCVT_BUFFER
[MAXDIG
];
40 static char ECVT_BUFFER
[MAXDIG
];
41 libc_freeres_ptr (static char *FCVT_BUFPTR
);
44 __FCVT (FLOAT_TYPE value
, int ndigit
, int *decpt
, int *sign
)
46 if (FCVT_BUFPTR
== NULL
)
48 if (__FCVT_R (value
, ndigit
, decpt
, sign
, FCVT_BUFFER
, MAXDIG
) != -1)
51 FCVT_BUFPTR
= (char *) malloc (FCVT_MAXDIG
);
52 if (FCVT_BUFPTR
== NULL
)
56 (void) __FCVT_R (value
, ndigit
, decpt
, sign
, FCVT_BUFPTR
, FCVT_MAXDIG
);
63 __ECVT (FLOAT_TYPE value
, int ndigit
, int *decpt
, int *sign
)
65 (void) __ECVT_R (value
, ndigit
, decpt
, sign
, ECVT_BUFFER
, MAXDIG
);
71 __GCVT (FLOAT_TYPE value
, int ndigit
, char *buf
)
73 SPRINTF (buf
, "%.*" FLOAT_FMT_FLAG
"g", MIN (ndigit
, NDIGIT_MAX
), value
);