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fad899e566
Added BcMath\Number class. It is an immutable object, has methods that are equivalent to existing BCMath calculation functions, and can also be calculated using operators. The existing BCMath function returned a string for each calculation, but this class returns an object. RFC: https://wiki.php.net/rfc/support_object_type_in_bcmath, https://wiki.php.net/rfc/fix_up_bcmath_number_class --------- Co-authored-by: Niels Dossche <7771979+nielsdos@users.noreply.github.com>
60 lines
1.8 KiB
C
60 lines
1.8 KiB
C
/* rmzero.c: bcmath library file. */
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/*
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Copyright (C) 1991, 1992, 1993, 1994, 1997 Free Software Foundation, Inc.
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Copyright (C) 2000 Philip A. Nelson
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details. (LICENSE)
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to:
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The Free Software Foundation, Inc.
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59 Temple Place, Suite 330
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Boston, MA 02111-1307 USA.
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You may contact the author by:
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e-mail: philnelson@acm.org
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us-mail: Philip A. Nelson
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Computer Science Department, 9062
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Western Washington University
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Bellingham, WA 98226-9062
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*************************************************************************/
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#include "bcmath.h"
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#include "private.h"
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/* For many things, we may have leading zeros in a number NUM.
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_bc_rm_leading_zeros just moves the data "value" pointer to the
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correct place and adjusts the length. */
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void _bc_rm_leading_zeros(bc_num num)
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{
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/* We can move n_value to point to the first non-zero digit! */
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while (*num->n_value == 0 && num->n_len > 1) {
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num->n_value++;
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num->n_len--;
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}
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}
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void bc_rm_trailing_zeros(bc_num num)
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{
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if (num->n_scale == 0) {
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return;
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}
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char *end = num->n_value + num->n_len + num->n_scale - 1;
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while (*end == 0 && num->n_scale > 0) {
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num->n_scale--;
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end--;
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}
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}
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