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ext/bcmath/libbcmath/src/zero.c
61 строка
2 KB
Jorg Adam Sowa
BCmath extension code reformatting (#11896)
13 авг 2023, 18:17
Не верифицирован
13 авг 2023, 18:17
e56ed6e
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/* zero.c: bcmath library file. */ /* Copyright (C) 1991, 1992, 1993, 1994, 1997 Free Software Foundation, Inc. Copyright (C) 2000 Philip A. Nelson This 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 2 of the License, or (at your option) any later version. This 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. (LICENSE) You should have received a copy of the GNU Lesser General Public License along with this library; if not, write to: The Free Software Foundation, Inc. 59 Temple Place, Suite 330 Boston, MA 02111-1307 USA. You may contact the author by: e-mail: philnelson@acm.org us-mail: Philip A. Nelson Computer Science Department, 9062 Western Washington University Bellingham, WA 98226-9062 *************************************************************************/ #include "bcmath.h" #include <stdbool.h> #include <stddef.h> /* In some places we need to check if the number NUM is zero. */ bool bc_is_zero_for_scale(bc_num num, size_t scale) { size_t count; char *nptr; /* Quick check. */ if (num == BCG(_zero_)) { return true; } /* Initialize */ count = num->n_len + scale; nptr = num->n_value; /* The check */ while ((count > 0) && (*nptr++ == 0)) count--; return count == 0; } bool bc_is_zero(bc_num num) { return bc_is_zero_for_scale(num, num->n_scale); }