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Name	Size	Permission	Date
.libs	[ DIR ]	drwxr-xr-x	2024-03-12 14:24
add.c	2.5 KB	-rw-rw-r--	2022-10-31 11:36
add.lo	325 B	-rw-r--r--	2024-03-12 14:24
add.o	71.13 KB	-rw-r--r--	2024-03-12 14:24
bcmath.h	4.63 KB	-rw-rw-r--	2022-10-31 11:36
compare.c	3.75 KB	-rw-rw-r--	2022-10-31 11:36
compare.lo	337 B	-rw-r--r--	2024-03-12 14:24
compare.o	70.95 KB	-rw-r--r--	2024-03-12 14:24
config.h	175 B	-rw-rw-r--	2022-10-31 11:36
debug.c	1.78 KB	-rw-rw-r--	2022-10-31 11:36
debug.lo	331 B	-rw-r--r--	2024-03-12 14:24
debug.o	71.29 KB	-rw-r--r--	2024-03-12 14:24
div.c	6.8 KB	-rw-rw-r--	2022-10-31 11:36
div.lo	325 B	-rw-r--r--	2024-03-12 14:24
div.o	79.02 KB	-rw-r--r--	2024-03-12 14:24
divmod.c	2.38 KB	-rw-rw-r--	2022-10-31 11:36
divmod.lo	334 B	-rw-r--r--	2024-03-12 14:24
divmod.o	72.11 KB	-rw-r--r--	2024-03-12 14:24
doaddsub.c	5.75 KB	-rw-rw-r--	2022-10-31 11:36
doaddsub.lo	340 B	-rw-r--r--	2024-03-12 14:24
doaddsub.o	75.63 KB	-rw-r--r--	2024-03-12 14:24
init.c	3.06 KB	-rw-rw-r--	2022-10-31 11:36
init.lo	328 B	-rw-r--r--	2024-03-12 14:24
init.o	73.13 KB	-rw-r--r--	2024-03-12 14:24
int2num.c	2.05 KB	-rw-rw-r--	2022-10-31 11:36
int2num.lo	337 B	-rw-r--r--	2024-03-12 14:24
int2num.o	70.88 KB	-rw-r--r--	2024-03-12 14:24
nearzero.c	1.93 KB	-rw-rw-r--	2022-10-31 11:36
nearzero.lo	340 B	-rw-r--r--	2024-03-12 14:24
nearzero.o	69.63 KB	-rw-r--r--	2024-03-12 14:24
neg.c	1.48 KB	-rw-rw-r--	2022-10-31 11:36
neg.lo	325 B	-rw-r--r--	2024-03-12 14:24
neg.o	68.05 KB	-rw-r--r--	2024-03-12 14:24
num2long.c	2.09 KB	-rw-rw-r--	2022-10-31 11:36
num2long.lo	340 B	-rw-r--r--	2024-03-12 14:24
num2long.o	69.23 KB	-rw-r--r--	2024-03-12 14:24
num2str.c	2.41 KB	-rw-rw-r--	2022-10-31 11:36
num2str.lo	337 B	-rw-r--r--	2024-03-12 14:24
num2str.o	71.31 KB	-rw-r--r--	2024-03-12 14:24
outofmem.c	1.43 KB	-rw-rw-r--	2022-10-31 11:36
outofmem.lo	340 B	-rw-r--r--	2024-03-12 14:24
outofmem.o	68.59 KB	-rw-r--r--	2024-03-12 14:24
output.c	5.48 KB	-rw-rw-r--	2022-10-31 11:36
output.lo	334 B	-rw-r--r--	2024-03-12 14:24
output.o	78.58 KB	-rw-r--r--	2024-03-12 14:24
private.h	1.49 KB	-rw-rw-r--	2022-10-31 11:36
raise.c	3.36 KB	-rw-rw-r--	2022-10-31 11:36
raise.lo	331 B	-rw-r--r--	2024-03-12 14:24
raise.o	72.98 KB	-rw-r--r--	2024-03-12 14:24
raisemod.c	3.63 KB	-rw-rw-r--	2022-10-31 11:36
raisemod.lo	340 B	-rw-r--r--	2024-03-12 14:24
raisemod.o	77.42 KB	-rw-r--r--	2024-03-12 14:24
recmul.c	7.37 KB	-rw-rw-r--	2022-10-31 11:36
recmul.lo	334 B	-rw-r--r--	2024-03-12 14:24
recmul.o	85.43 KB	-rw-r--r--	2024-03-12 14:24
rmzero.c	1.73 KB	-rw-rw-r--	2022-10-31 11:36
rmzero.lo	334 B	-rw-r--r--	2024-03-12 14:24
rmzero.o	68.13 KB	-rw-r--r--	2024-03-12 14:24
sqrt.c	3.36 KB	-rw-rw-r--	2022-10-31 11:36
sqrt.lo	328 B	-rw-r--r--	2024-03-12 14:24
sqrt.o	74 KB	-rw-r--r--	2024-03-12 14:24
str2num.c	2.93 KB	-rw-rw-r--	2022-10-31 11:36
str2num.lo	337 B	-rw-r--r--	2024-03-12 14:24
str2num.o	71.71 KB	-rw-r--r--	2024-03-12 14:24
sub.c	2.54 KB	-rw-rw-r--	2022-10-31 11:36
sub.lo	325 B	-rw-r--r--	2024-03-12 14:24
sub.o	71.09 KB	-rw-r--r--	2024-03-12 14:24
zero.c	1.83 KB	-rw-rw-r--	2022-10-31 11:36
zero.lo	328 B	-rw-r--r--	2024-03-12 14:24
zero.o	69.83 KB	-rw-r--r--	2024-03-12 14:24

Rename

/* raise.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 <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <stdarg.h>
#include "bcmath.h"
#include "private.h"

/* Raise NUM1 to the NUM2 power.  The result is placed in RESULT.
   Maximum exponent is LONG_MAX.  If a NUM2 is not an integer,
   only the integer part is used.  */

void
bc_raise (bc_num num1, bc_num num2, bc_num *result, int scale)
{
   bc_num temp, power;
   long exponent;
   int rscale;
   int pwrscale;
   int calcscale;
   char neg;

/* Check the exponent for scale digits and convert to a long. */
   if (num2->n_scale != 0)
     php_error_docref (NULL, E_WARNING, "non-zero scale in exponent");
   exponent = bc_num2long (num2);
   if (exponent == 0 && (num2->n_len > 1 || num2->n_value[0] != 0))
       php_error_docref (NULL, E_WARNING, "exponent too large");

/* Special case if exponent is a zero. */
   if (exponent == 0)
     {
       bc_free_num (result);
       *result = bc_copy_num (BCG(_one_));
       return;
     }

/* Other initializations. */
   if (exponent < 0)
     {
       neg = TRUE;
       exponent = -exponent;
       rscale = scale;
     }
   else
     {
       neg = FALSE;
       rscale = MIN (num1->n_scale*exponent, MAX(scale, num1->n_scale));
     }

/* Set initial value of temp.  */
   power = bc_copy_num (num1);
   pwrscale = num1->n_scale;
   while ((exponent & 1) == 0)
     {
       pwrscale = 2*pwrscale;
       bc_multiply (power, power, &power, pwrscale);
       exponent = exponent >> 1;
     }
   temp = bc_copy_num (power);
   calcscale = pwrscale;
   exponent = exponent >> 1;

/* Do the calculation. */
   while (exponent > 0)
     {
       pwrscale = 2*pwrscale;
       bc_multiply (power, power, &power, pwrscale);
       if ((exponent & 1) == 1) {
	 calcscale = pwrscale + calcscale;
	 bc_multiply (temp, power, &temp, calcscale);
       }
       exponent = exponent >> 1;
     }

/* Assign the value. */
   if (neg)
     {
       bc_divide (BCG(_one_), temp, result, rscale);
       bc_free_num (&temp);
     }
   else
     {
       bc_free_num (result);
       *result = temp;
       if ((*result)->n_scale > rscale)
	 (*result)->n_scale = rscale;
     }
   bc_free_num (&power);
}