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5a4832f97b
Changed BCG memory allocation to be forcibly released in PHP_GSHUTDOWN_FUNCTION regardless of refcount. Fixes #17398 Closes #17615
154 lines
4.4 KiB
C
154 lines
4.4 KiB
C
/* bcmath.h: bcmath library header. */
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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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#ifndef _BCMATH_H_
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#define _BCMATH_H_
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#include <stddef.h>
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typedef enum {PLUS, MINUS} sign;
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typedef struct bc_struct *bc_num;
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typedef struct bc_struct {
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sign n_sign;
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size_t n_len; /* The number of digits before the decimal point. */
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size_t n_scale; /* The number of digits after the decimal point. */
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int n_refs; /* The number of pointers to this number. */
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char *n_ptr; /* The pointer to the actual storage.
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If NULL, n_value points to the inside of another number
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(bc_multiply...) and should not be "freed." */
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char *n_value; /* The number. Not zero char terminated.
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May not point to the same place as n_ptr as
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in the case of leading zeros generated. */
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} bc_struct;
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "zend.h"
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#include <stdbool.h>
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#include "zend_string.h"
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#include "../../php_bcmath.h" /* Needed for BCG() macro */
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/* The base used in storing the numbers in n_value above.
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Currently, this MUST be 10. */
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#define BASE 10
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/* Some useful macros and constants. */
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#define CH_VAL(c) (c - '0')
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#define BCD_CHAR(d) (d + '0')
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#ifdef MIN
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#undef MIN
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#undef MAX
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#endif
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#define MAX(a, b) ((a)>(b)?(a):(b))
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#define MIN(a, b) ((a)>(b)?(b):(a))
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#define ODD(a) ((a)&1)
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#ifndef LONG_MAX
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#define LONG_MAX 0x7ffffff
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#endif
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/* Function Prototypes */
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void bc_init_numbers(void);
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void bc_force_free_number(bc_num *num);
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bc_num _bc_new_num_ex(size_t length, size_t scale, bool persistent);
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void _bc_free_num_ex(bc_num *num, bool persistent);
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bc_num bc_copy_num(bc_num num);
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void bc_init_num(bc_num *num);
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bool bc_str2num(bc_num *num, char *str, size_t scale);
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zend_string *bc_num2str_ex(bc_num num, size_t scale);
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void bc_int2num(bc_num *num, int val);
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long bc_num2long(bc_num num);
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int bc_compare(bc_num n1, bc_num n2);
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bool bc_is_zero(bc_num num);
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bool bc_is_zero_for_scale(bc_num num, size_t scale);
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bool bc_is_near_zero(bc_num num, size_t scale);
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bool bc_is_neg(bc_num num);
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void bc_add(bc_num n1, bc_num n2, bc_num *result, size_t scale_min);
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void bc_sub(bc_num n1, bc_num n2, bc_num *result, size_t scale_min);
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void bc_multiply(bc_num n1, bc_num n2, bc_num *prod, size_t scale);
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bool bc_divide(bc_num n1, bc_num n2, bc_num *quot, int scale);
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bool bc_modulo(bc_num num1, bc_num num2, bc_num *resul, size_t scale);
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bool bc_divmod(bc_num num1, bc_num num2, bc_num *quo, bc_num *rem, size_t scale);
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typedef enum {
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OK,
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BASE_HAS_FRACTIONAL,
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EXPO_HAS_FRACTIONAL,
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EXPO_IS_NEGATIVE,
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MOD_HAS_FRACTIONAL,
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MOD_IS_ZERO
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} raise_mod_status;
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raise_mod_status bc_raisemod(bc_num base, bc_num exponent, bc_num mod, bc_num *result, size_t scale);
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void bc_raise(bc_num base, long exponent, bc_num *resul, size_t scale);
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void bc_raise_bc_exponent(bc_num base, bc_num exponent, bc_num *resul, size_t scale);
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bool bc_sqrt(bc_num *num, size_t scale);
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void bc_out_num(bc_num num, int o_base, void (* out_char)(char), bool leading_zero);
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/* Prototypes needed for external utility routines. */
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#define bc_new_num(length, scale) _bc_new_num_ex((length), (scale), 0)
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#define bc_free_num(num) _bc_free_num_ex((num), 0)
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#define bc_num2str(num) bc_num2str_ex((num), (num->n_scale))
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#endif
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