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657695fe97
The `n_next` member of struct `bc_struct` is unused; the only code that would use this member has been disabled since libbcmath has been bundled nearly 17 years ago. Apparently, `n_next` has been designed to build a linked list of free numbers, but it is doubtful whether that would be an improvement over relying on the efficiency of the ZendMM, so we remove the remaining support altogether. The ABI break probably affects nobody, but would be okay for a new minor version according to our release process, anyway.
116 lines
3.1 KiB
C
116 lines
3.1 KiB
C
/* init.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. (COPYING.LIB)
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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 <config.h>
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#include <stdio.h>
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#include <assert.h>
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#include <stdlib.h>
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#include <ctype.h>
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#include <stdarg.h>
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#include "bcmath.h"
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#include "private.h"
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/* new_num allocates a number and sets fields to known values. */
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bc_num
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_bc_new_num_ex (length, scale, persistent)
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int length, scale, persistent;
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{
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bc_num temp;
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/* PHP Change: add length check */
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if ((size_t)length+(size_t)scale > INT_MAX) {
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zend_error(E_ERROR, "Result too long, max is %d", INT_MAX);
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}
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/* PHP Change: malloc() -> pemalloc(), removed free_list code */
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temp = (bc_num) safe_pemalloc (1, sizeof(bc_struct)+length, scale, persistent);
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temp->n_sign = PLUS;
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temp->n_len = length;
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temp->n_scale = scale;
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temp->n_refs = 1;
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/* PHP Change: malloc() -> pemalloc() */
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temp->n_ptr = (char *) safe_pemalloc (1, length, scale, persistent);
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temp->n_value = temp->n_ptr;
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memset (temp->n_ptr, 0, length+scale);
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return temp;
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}
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/* "Frees" a bc_num NUM. Actually decreases reference count and only
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frees the storage if reference count is zero. */
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void
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_bc_free_num_ex (num, persistent)
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bc_num *num;
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int persistent;
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{
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if (*num == NULL) return;
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(*num)->n_refs--;
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if ((*num)->n_refs == 0) {
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if ((*num)->n_ptr)
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/* PHP Change: free() -> pefree(), removed free_list code */
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pefree ((*num)->n_ptr, persistent);
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pefree(*num, persistent);
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}
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*num = NULL;
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}
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/* Intitialize the number package! */
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void
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bc_init_numbers (void)
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{
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BCG(_zero_) = _bc_new_num_ex (1,0,1);
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BCG(_one_) = _bc_new_num_ex (1,0,1);
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BCG(_one_)->n_value[0] = 1;
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BCG(_two_) = _bc_new_num_ex (1,0,1);
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BCG(_two_)->n_value[0] = 2;
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}
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/* Make a copy of a number! Just increments the reference count! */
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bc_num
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bc_copy_num (bc_num num)
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{
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num->n_refs++;
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return num;
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}
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/* Initialize a number NUM by making it a copy of zero. */
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void
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bc_init_num (bc_num *num)
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{
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*num = bc_copy_num (BCG(_zero_));
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}
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