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/* init.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. (COPYING.LIB)
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 <assert.h>
#include <stdlib.h>
#include <ctype.h>
#include <stdarg.h>
#include "bcmath.h"
#include "private.h"
/* new_num allocates a number and sets fields to known values. */
bc_num
_bc_new_num_ex (length, scale, persistent)
int length, scale, persistent;
{
bc_num temp;
/* PHP Change: add length check */
if ((size_t)length+(size_t)scale > INT_MAX) {
zend_error(E_ERROR, "Result too long, max is %d", INT_MAX);
}
/* PHP Change: malloc() -> pemalloc(), removed free_list code */
temp = (bc_num) safe_pemalloc (1, sizeof(bc_struct)+length, scale, persistent);
temp->n_sign = PLUS;
temp->n_len = length;
temp->n_scale = scale;
temp->n_refs = 1;
/* PHP Change: malloc() -> pemalloc() */
temp->n_ptr = (char *) safe_pemalloc (1, length, scale, persistent);
temp->n_value = temp->n_ptr;
memset (temp->n_ptr, 0, length+scale);
return temp;
}
/* "Frees" a bc_num NUM. Actually decreases reference count and only
frees the storage if reference count is zero. */
void
_bc_free_num_ex (num, persistent)
bc_num *num;
int persistent;
{
if (*num == NULL) return;
(*num)->n_refs--;
if ((*num)->n_refs == 0) {
if ((*num)->n_ptr)
/* PHP Change: free() -> pefree(), removed free_list code */
pefree ((*num)->n_ptr, persistent);
pefree(*num, persistent);
}
*num = NULL;
}
/* Intitialize the number package! */
void
bc_init_numbers (void)
{
BCG(_zero_) = _bc_new_num_ex (1,0,1);
BCG(_one_) = _bc_new_num_ex (1,0,1);
BCG(_one_)->n_value[0] = 1;
BCG(_two_) = _bc_new_num_ex (1,0,1);
BCG(_two_)->n_value[0] = 2;
}
/* Make a copy of a number! Just increments the reference count! */
bc_num
bc_copy_num (bc_num num)
{
num->n_refs++;
return num;
}
/* Initialize a number NUM by making it a copy of zero. */
void
bc_init_num (bc_num *num)
{
*num = bc_copy_num (BCG(_zero_));
}
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