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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"
/* Storage used for special numbers. */
bc_num _zero_;
bc_num _one_;
bc_num _two_;
bc_num _bc_Free_list = NULL;
/* new_num allocates a number and sets fields to known values. */
bc_num
bc_new_num (length, scale)
int length, scale;
{
bc_num temp;
/* PHP Change: malloc() -> emalloc(), removed free_list code */
temp = (bc_num) emalloc (sizeof(bc_struct)+length+scale);
#if 0
if (_bc_Free_list != NULL) {
temp = _bc_Free_list;
_bc_Free_list = temp->n_next;
} else {
temp = (bc_num) emalloc (sizeof(bc_struct));
if (temp == NULL) bc_out_of_memory ();
}
#endif
temp->n_sign = PLUS;
temp->n_len = length;
temp->n_scale = scale;
temp->n_refs = 1;
/* PHP Change: malloc() -> emalloc() */
temp->n_ptr = (char *) emalloc (length+scale);
if (temp->n_ptr == NULL) bc_out_of_memory();
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 (num)
bc_num *num;
{
if (*num == NULL) return;
(*num)->n_refs--;
if ((*num)->n_refs == 0) {
if ((*num)->n_ptr)
/* PHP Change: free() -> efree(), removed free_list code */
efree ((*num)->n_ptr);
efree(*num);
#if 0
(*num)->n_next = _bc_Free_list;
_bc_Free_list = *num;
#endif
}
*num = NULL;
}
/* Intitialize the number package! */
void
bc_init_numbers ()
{
_zero_ = bc_new_num (1,0);
_one_ = bc_new_num (1,0);
_one_->n_value[0] = 1;
_two_ = bc_new_num (1,0);
_two_->n_value[0] = 2;
}
/* Make a copy of a number! Just increments the reference count! */
bc_num
bc_copy_num (num)
bc_num num;
{
num->n_refs++;
return num;
}
/* Initialize a number NUM by making it a copy of zero. */
void
bc_init_num (num)
bc_num *num;
{
*num = bc_copy_num (_zero_);
}
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