out_str.c
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上传日期:2022-08-06
资源大小:2570k
文件大小:3k
- /* mpf_out_str (stream, base, n_digits, op) -- Print N_DIGITS digits from
- the float OP to STREAM in base BASE. Return the number of characters
- written, or 0 if an error occurred.
- Copyright 1996, 1997, 2001, 2002, 2005 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 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.
- 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 Lesser General Public
- License for more details.
- You should have received a copy of the GNU Lesser General Public License
- along with the GNU MP Library. If not, see http://www.gnu.org/licenses/. */
- #define _GNU_SOURCE /* for DECIMAL_POINT in langinfo.h */
- #include "config.h"
- #include <stdio.h>
- #include <string.h>
- #if HAVE_LANGINFO_H
- #include <langinfo.h> /* for nl_langinfo */
- #endif
- #if HAVE_LOCALE_H
- #include <locale.h> /* for localeconv */
- #endif
- #include "gmp.h"
- #include "gmp-impl.h"
- size_t
- mpf_out_str (FILE *stream, int base, size_t n_digits, mpf_srcptr op)
- {
- char *str;
- mp_exp_t exp;
- size_t written;
- TMP_DECL;
- TMP_MARK;
- if (base == 0)
- base = 10;
- if (n_digits == 0)
- MPF_SIGNIFICANT_DIGITS (n_digits, base, op->_mp_prec);
- if (stream == 0)
- stream = stdout;
- /* Consider these changes:
- * Don't allocate memory here for huge n_digits; pass NULL to mpf_get_str.
- * Make mpf_get_str allocate extra space when passed NULL, to avoid
- allocating two huge string buffers.
- * Implement more/other allocation reductions tricks. */
- str = (char *) TMP_ALLOC (n_digits + 2); /* extra for minus sign and