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1.1 misho 1: /* zero.c: bcmath library file. */ 2: /* 3: Copyright (C) 1991, 1992, 1993, 1994, 1997 Free Software Foundation, Inc. 4: Copyright (C) 2000 Philip A. Nelson 5: 6: This library is free software; you can redistribute it and/or 7: modify it under the terms of the GNU Lesser General Public 8: License as published by the Free Software Foundation; either 9: version 2 of the License, or (at your option) any later version. 10: 11: This library is distributed in the hope that it will be useful, 12: but WITHOUT ANY WARRANTY; without even the implied warranty of 13: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14: Lesser General Public License for more details. (COPYING.LIB) 15: 16: You should have received a copy of the GNU Lesser General Public 17: License along with this library; if not, write to: 18: 19: The Free Software Foundation, Inc. 20: 59 Temple Place, Suite 330 21: Boston, MA 02111-1307 USA. 22: 23: You may contact the author by: 24: e-mail: philnelson@acm.org 25: us-mail: Philip A. Nelson 26: Computer Science Department, 9062 27: Western Washington University 28: Bellingham, WA 98226-9062 29: 30: *************************************************************************/ 31: 32: #include <config.h> 33: #include <stdio.h> 34: #include <assert.h> 35: #include <stdlib.h> 36: #include <ctype.h> 37: #include <stdarg.h> 38: #include "bcmath.h" 39: #include "private.h" 40: 41: /* In some places we need to check if the number NUM is zero. */ 42: 43: char 44: bc_is_zero (bc_num num TSRMLS_DC) 45: { 46: int count; 47: char *nptr; 48: 49: /* Quick check. */ 50: if (num == BCG(_zero_)) return TRUE; 51: 52: /* Initialize */ 53: count = num->n_len + num->n_scale; 54: nptr = num->n_value; 55: 56: /* The check */ 57: while ((count > 0) && (*nptr++ == 0)) count--; 58: 59: if (count != 0) 60: return FALSE; 61: else 62: return TRUE; 63: } 64: