mirror of
https://github.com/php/php-src.git
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90dcbbe3cb
bcmod() no longer truncates fractionals to integers. This matches the behavior of fmod(). It also matches the behavior of bcpowmod(). It also matches the behavior of bcmod() in HHVM.
607 lines
14 KiB
C
607 lines
14 KiB
C
/*
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+----------------------------------------------------------------------+
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| PHP Version 7 |
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+----------------------------------------------------------------------+
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| Copyright (c) 1997-2017 The PHP Group |
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+----------------------------------------------------------------------+
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| This source file is subject to version 3.01 of the PHP license, |
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| that is bundled with this package in the file LICENSE, and is |
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| available through the world-wide-web at the following url: |
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| http://www.php.net/license/3_01.txt |
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| If you did not receive a copy of the PHP license and are unable to |
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| obtain it through the world-wide-web, please send a note to |
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| license@php.net so we can mail you a copy immediately. |
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+----------------------------------------------------------------------+
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| Author: Andi Gutmans <andi@zend.com> |
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+----------------------------------------------------------------------+
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*/
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/* $Id$ */
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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 "php.h"
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#if HAVE_BCMATH
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#include "php_ini.h"
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#include "ext/standard/info.h"
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#include "php_bcmath.h"
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#include "libbcmath/src/bcmath.h"
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ZEND_DECLARE_MODULE_GLOBALS(bcmath)
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static PHP_GINIT_FUNCTION(bcmath);
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static PHP_GSHUTDOWN_FUNCTION(bcmath);
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/* {{{ arginfo */
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ZEND_BEGIN_ARG_INFO_EX(arginfo_bcadd, 0, 0, 2)
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ZEND_ARG_INFO(0, left_operand)
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ZEND_ARG_INFO(0, right_operand)
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ZEND_ARG_INFO(0, scale)
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ZEND_END_ARG_INFO()
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ZEND_BEGIN_ARG_INFO_EX(arginfo_bcsub, 0, 0, 2)
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ZEND_ARG_INFO(0, left_operand)
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ZEND_ARG_INFO(0, right_operand)
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ZEND_ARG_INFO(0, scale)
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ZEND_END_ARG_INFO()
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ZEND_BEGIN_ARG_INFO_EX(arginfo_bcmul, 0, 0, 2)
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ZEND_ARG_INFO(0, left_operand)
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ZEND_ARG_INFO(0, right_operand)
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ZEND_ARG_INFO(0, scale)
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ZEND_END_ARG_INFO()
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ZEND_BEGIN_ARG_INFO_EX(arginfo_bcdiv, 0, 0, 2)
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ZEND_ARG_INFO(0, left_operand)
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ZEND_ARG_INFO(0, right_operand)
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ZEND_ARG_INFO(0, scale)
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ZEND_END_ARG_INFO()
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ZEND_BEGIN_ARG_INFO(arginfo_bcmod, 0)
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ZEND_ARG_INFO(0, left_operand)
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ZEND_ARG_INFO(0, right_operand)
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ZEND_END_ARG_INFO()
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ZEND_BEGIN_ARG_INFO_EX(arginfo_bcpowmod, 0, 0, 3)
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ZEND_ARG_INFO(0, x)
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ZEND_ARG_INFO(0, y)
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ZEND_ARG_INFO(0, mod)
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ZEND_ARG_INFO(0, scale)
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ZEND_END_ARG_INFO()
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ZEND_BEGIN_ARG_INFO_EX(arginfo_bcpow, 0, 0, 2)
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ZEND_ARG_INFO(0, x)
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ZEND_ARG_INFO(0, y)
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ZEND_ARG_INFO(0, scale)
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ZEND_END_ARG_INFO()
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ZEND_BEGIN_ARG_INFO_EX(arginfo_bcsqrt, 0, 0, 1)
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ZEND_ARG_INFO(0, operand)
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ZEND_ARG_INFO(0, scale)
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ZEND_END_ARG_INFO()
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ZEND_BEGIN_ARG_INFO_EX(arginfo_bccomp, 0, 0, 2)
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ZEND_ARG_INFO(0, left_operand)
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ZEND_ARG_INFO(0, right_operand)
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ZEND_ARG_INFO(0, scale)
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ZEND_END_ARG_INFO()
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ZEND_BEGIN_ARG_INFO(arginfo_bcscale, 0)
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ZEND_ARG_INFO(0, scale)
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ZEND_END_ARG_INFO()
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/* }}} */
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const zend_function_entry bcmath_functions[] = {
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PHP_FE(bcadd, arginfo_bcadd)
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PHP_FE(bcsub, arginfo_bcsub)
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PHP_FE(bcmul, arginfo_bcmul)
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PHP_FE(bcdiv, arginfo_bcdiv)
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PHP_FE(bcmod, arginfo_bcmod)
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PHP_FE(bcpow, arginfo_bcpow)
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PHP_FE(bcsqrt, arginfo_bcsqrt)
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PHP_FE(bcscale, arginfo_bcscale)
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PHP_FE(bccomp, arginfo_bccomp)
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PHP_FE(bcpowmod, arginfo_bcpowmod)
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PHP_FE_END
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};
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zend_module_entry bcmath_module_entry = {
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STANDARD_MODULE_HEADER,
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"bcmath",
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bcmath_functions,
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PHP_MINIT(bcmath),
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PHP_MSHUTDOWN(bcmath),
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NULL,
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NULL,
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PHP_MINFO(bcmath),
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PHP_BCMATH_VERSION,
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PHP_MODULE_GLOBALS(bcmath),
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PHP_GINIT(bcmath),
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PHP_GSHUTDOWN(bcmath),
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NULL,
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STANDARD_MODULE_PROPERTIES_EX
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};
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#ifdef COMPILE_DL_BCMATH
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#ifdef ZTS
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ZEND_TSRMLS_CACHE_DEFINE()
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#endif
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ZEND_GET_MODULE(bcmath)
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#endif
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/* {{{ PHP_INI */
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PHP_INI_BEGIN()
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STD_PHP_INI_ENTRY("bcmath.scale", "0", PHP_INI_ALL, OnUpdateLongGEZero, bc_precision, zend_bcmath_globals, bcmath_globals)
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PHP_INI_END()
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/* }}} */
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/* {{{ PHP_GINIT_FUNCTION
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*/
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static PHP_GINIT_FUNCTION(bcmath)
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{
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#if defined(COMPILE_DL_BCMATH) && defined(ZTS)
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ZEND_TSRMLS_CACHE_UPDATE();
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#endif
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bcmath_globals->bc_precision = 0;
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bc_init_numbers();
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}
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/* }}} */
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/* {{{ PHP_GSHUTDOWN_FUNCTION
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*/
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static PHP_GSHUTDOWN_FUNCTION(bcmath)
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{
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_bc_free_num_ex(&bcmath_globals->_zero_, 1);
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_bc_free_num_ex(&bcmath_globals->_one_, 1);
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_bc_free_num_ex(&bcmath_globals->_two_, 1);
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}
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/* }}} */
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/* {{{ PHP_MINIT_FUNCTION
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*/
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PHP_MINIT_FUNCTION(bcmath)
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{
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REGISTER_INI_ENTRIES();
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return SUCCESS;
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}
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/* }}} */
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/* {{{ PHP_MSHUTDOWN_FUNCTION
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*/
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PHP_MSHUTDOWN_FUNCTION(bcmath)
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{
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UNREGISTER_INI_ENTRIES();
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return SUCCESS;
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}
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/* }}} */
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/* {{{ PHP_MINFO_FUNCTION
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*/
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PHP_MINFO_FUNCTION(bcmath)
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{
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php_info_print_table_start();
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php_info_print_table_row(2, "BCMath support", "enabled");
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php_info_print_table_end();
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DISPLAY_INI_ENTRIES();
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}
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/* }}} */
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/* {{{ php_str2num
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Convert to bc_num detecting scale */
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static void php_str2num(bc_num *num, char *str)
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{
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char *p;
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if (!(p = strchr(str, '.'))) {
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bc_str2num(num, str, 0);
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return;
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}
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bc_str2num(num, str, strlen(p+1));
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}
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/* }}} */
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/* {{{ split_bc_num
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Convert to bc_num detecting scale */
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static bc_num split_bc_num(bc_num num) {
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bc_num newnum;
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if (num->n_refs >= 1) {
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return num;
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}
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newnum = _bc_new_num_ex(0, 0, 0);
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*newnum = *num;
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newnum->n_refs = 1;
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num->n_refs--;
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return newnum;
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}
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/* }}} */
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/* {{{ proto string bcadd(string left_operand, string right_operand [, int scale])
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Returns the sum of two arbitrary precision numbers */
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PHP_FUNCTION(bcadd)
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{
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zend_string *left, *right;
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zend_long scale_param = 0;
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bc_num first, second, result;
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int scale = (int)BCG(bc_precision);
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ZEND_PARSE_PARAMETERS_START(2, 3)
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Z_PARAM_STR(left)
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Z_PARAM_STR(right)
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Z_PARAM_OPTIONAL
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Z_PARAM_LONG(scale_param)
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ZEND_PARSE_PARAMETERS_END();
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if (ZEND_NUM_ARGS() == 3) {
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scale = (int) (scale_param < 0 ? 0 : scale_param);
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}
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bc_init_num(&first);
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bc_init_num(&second);
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bc_init_num(&result);
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php_str2num(&first, ZSTR_VAL(left));
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php_str2num(&second, ZSTR_VAL(right));
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bc_add (first, second, &result, scale);
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if (result->n_scale > scale) {
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result = split_bc_num(result);
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result->n_scale = scale;
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}
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RETVAL_STR(bc_num2str(result));
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bc_free_num(&first);
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bc_free_num(&second);
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bc_free_num(&result);
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return;
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}
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/* }}} */
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/* {{{ proto string bcsub(string left_operand, string right_operand [, int scale])
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Returns the difference between two arbitrary precision numbers */
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PHP_FUNCTION(bcsub)
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{
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zend_string *left, *right;
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zend_long scale_param = 0;
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bc_num first, second, result;
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int scale = (int)BCG(bc_precision);
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ZEND_PARSE_PARAMETERS_START(2, 3)
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Z_PARAM_STR(left)
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Z_PARAM_STR(right)
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Z_PARAM_OPTIONAL
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Z_PARAM_LONG(scale_param)
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ZEND_PARSE_PARAMETERS_END();
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if (ZEND_NUM_ARGS() == 3) {
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scale = (int) ((int)scale_param < 0 ? 0 : scale_param);
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}
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bc_init_num(&first);
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bc_init_num(&second);
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bc_init_num(&result);
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php_str2num(&first, ZSTR_VAL(left));
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php_str2num(&second, ZSTR_VAL(right));
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bc_sub (first, second, &result, scale);
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if (result->n_scale > scale) {
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result = split_bc_num(result);
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result->n_scale = scale;
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}
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RETVAL_STR(bc_num2str(result));
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bc_free_num(&first);
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bc_free_num(&second);
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bc_free_num(&result);
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return;
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}
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/* }}} */
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/* {{{ proto string bcmul(string left_operand, string right_operand [, int scale])
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Returns the multiplication of two arbitrary precision numbers */
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PHP_FUNCTION(bcmul)
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{
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zend_string *left, *right;
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zend_long scale_param = 0;
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bc_num first, second, result;
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int scale = (int)BCG(bc_precision);
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ZEND_PARSE_PARAMETERS_START(2, 3)
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Z_PARAM_STR(left)
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Z_PARAM_STR(right)
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Z_PARAM_OPTIONAL
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Z_PARAM_LONG(scale_param)
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ZEND_PARSE_PARAMETERS_END();
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if (ZEND_NUM_ARGS() == 3) {
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scale = (int) ((int)scale_param < 0 ? 0 : scale_param);
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}
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bc_init_num(&first);
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bc_init_num(&second);
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bc_init_num(&result);
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php_str2num(&first, ZSTR_VAL(left));
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php_str2num(&second, ZSTR_VAL(right));
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bc_multiply (first, second, &result, scale);
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if (result->n_scale > scale) {
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result = split_bc_num(result);
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result->n_scale = scale;
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}
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RETVAL_STR(bc_num2str(result));
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bc_free_num(&first);
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bc_free_num(&second);
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bc_free_num(&result);
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return;
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}
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/* }}} */
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/* {{{ proto string bcdiv(string left_operand, string right_operand [, int scale])
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Returns the quotient of two arbitrary precision numbers (division) */
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PHP_FUNCTION(bcdiv)
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{
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zend_string *left, *right;
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zend_long scale_param = 0;
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bc_num first, second, result;
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int scale = (int)BCG(bc_precision);
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ZEND_PARSE_PARAMETERS_START(2, 3)
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Z_PARAM_STR(left)
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Z_PARAM_STR(right)
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Z_PARAM_OPTIONAL
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Z_PARAM_LONG(scale_param)
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ZEND_PARSE_PARAMETERS_END();
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if (ZEND_NUM_ARGS() == 3) {
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scale = (int) ((int)scale_param < 0 ? 0 : scale_param);
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}
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bc_init_num(&first);
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bc_init_num(&second);
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bc_init_num(&result);
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php_str2num(&first, ZSTR_VAL(left));
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php_str2num(&second, ZSTR_VAL(right));
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switch (bc_divide(first, second, &result, scale)) {
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case 0: /* OK */
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if (result->n_scale > scale) {
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result = split_bc_num(result);
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result->n_scale = scale;
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}
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RETVAL_STR(bc_num2str(result));
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break;
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case -1: /* division by zero */
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php_error_docref(NULL, E_WARNING, "Division by zero");
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break;
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}
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bc_free_num(&first);
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bc_free_num(&second);
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bc_free_num(&result);
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return;
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}
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/* }}} */
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/* {{{ proto string bcmod(string left_operand, string right_operand)
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Returns the modulus of the two arbitrary precision operands */
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PHP_FUNCTION(bcmod)
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{
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zend_string *left, *right;
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bc_num first, second, result;
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ZEND_PARSE_PARAMETERS_START(2, 2)
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Z_PARAM_STR(left)
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Z_PARAM_STR(right)
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ZEND_PARSE_PARAMETERS_END();
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bc_init_num(&first);
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bc_init_num(&second);
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bc_init_num(&result);
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php_str2num(&first, ZSTR_VAL(left));
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php_str2num(&second, ZSTR_VAL(right));
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switch (bc_modulo(first, second, &result, 0)) {
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case 0:
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RETVAL_STR(bc_num2str(result));
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break;
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case -1:
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php_error_docref(NULL, E_WARNING, "Division by zero");
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break;
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}
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bc_free_num(&first);
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bc_free_num(&second);
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bc_free_num(&result);
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return;
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}
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/* }}} */
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/* {{{ proto string bcpowmod(string x, string y, string mod [, int scale])
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Returns the value of an arbitrary precision number raised to the power of another reduced by a modulous */
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PHP_FUNCTION(bcpowmod)
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{
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zend_string *left, *right, *modulous;
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bc_num first, second, mod, result;
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zend_long scale = BCG(bc_precision);
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int scale_int;
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ZEND_PARSE_PARAMETERS_START(3, 4)
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Z_PARAM_STR(left)
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Z_PARAM_STR(right)
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Z_PARAM_STR(modulous)
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Z_PARAM_OPTIONAL
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Z_PARAM_LONG(scale)
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ZEND_PARSE_PARAMETERS_END();
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bc_init_num(&first);
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bc_init_num(&second);
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bc_init_num(&mod);
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bc_init_num(&result);
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php_str2num(&first, ZSTR_VAL(left));
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php_str2num(&second, ZSTR_VAL(right));
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php_str2num(&mod, ZSTR_VAL(modulous));
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scale_int = (int) ((int)scale < 0 ? 0 : scale);
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if (bc_raisemod(first, second, mod, &result, scale_int) != -1) {
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if (result->n_scale > scale_int) {
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result = split_bc_num(result);
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result->n_scale = scale_int;
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}
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RETVAL_STR(bc_num2str(result));
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} else {
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RETVAL_FALSE;
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}
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bc_free_num(&first);
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bc_free_num(&second);
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bc_free_num(&mod);
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bc_free_num(&result);
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return;
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}
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/* }}} */
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/* {{{ proto string bcpow(string x, string y [, int scale])
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Returns the value of an arbitrary precision number raised to the power of another */
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PHP_FUNCTION(bcpow)
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{
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zend_string *left, *right;
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zend_long scale_param = 0;
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bc_num first, second, result;
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int scale = (int)BCG(bc_precision);
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ZEND_PARSE_PARAMETERS_START(2, 3)
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Z_PARAM_STR(left)
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Z_PARAM_STR(right)
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Z_PARAM_OPTIONAL
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Z_PARAM_LONG(scale_param)
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ZEND_PARSE_PARAMETERS_END();
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if (ZEND_NUM_ARGS() == 3) {
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scale = (int) ((int)scale_param < 0 ? 0 : scale_param);
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}
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bc_init_num(&first);
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bc_init_num(&second);
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bc_init_num(&result);
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php_str2num(&first, ZSTR_VAL(left));
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php_str2num(&second, ZSTR_VAL(right));
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bc_raise (first, second, &result, scale);
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if (result->n_scale > scale) {
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result = split_bc_num(result);
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result->n_scale = scale;
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}
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RETVAL_STR(bc_num2str(result));
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bc_free_num(&first);
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bc_free_num(&second);
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bc_free_num(&result);
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return;
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}
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/* }}} */
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/* {{{ proto string bcsqrt(string operand [, int scale])
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|
Returns the square root of an arbitray precision number */
|
|
PHP_FUNCTION(bcsqrt)
|
|
{
|
|
zend_string *left;
|
|
zend_long scale_param = 0;
|
|
bc_num result;
|
|
int scale = (int)BCG(bc_precision);
|
|
|
|
ZEND_PARSE_PARAMETERS_START(1, 2)
|
|
Z_PARAM_STR(left)
|
|
Z_PARAM_OPTIONAL
|
|
Z_PARAM_LONG(scale_param)
|
|
ZEND_PARSE_PARAMETERS_END();
|
|
|
|
if (ZEND_NUM_ARGS() == 2) {
|
|
scale = (int) ((int)scale_param < 0 ? 0 : scale_param);
|
|
}
|
|
|
|
bc_init_num(&result);
|
|
php_str2num(&result, ZSTR_VAL(left));
|
|
|
|
if (bc_sqrt (&result, scale) != 0) {
|
|
if (result->n_scale > scale) {
|
|
result = split_bc_num(result);
|
|
result->n_scale = scale;
|
|
}
|
|
RETVAL_STR(bc_num2str(result));
|
|
} else {
|
|
php_error_docref(NULL, E_WARNING, "Square root of negative number");
|
|
}
|
|
|
|
bc_free_num(&result);
|
|
return;
|
|
}
|
|
/* }}} */
|
|
|
|
/* {{{ proto int bccomp(string left_operand, string right_operand [, int scale])
|
|
Compares two arbitrary precision numbers */
|
|
PHP_FUNCTION(bccomp)
|
|
{
|
|
zend_string *left, *right;
|
|
zend_long scale_param = 0;
|
|
bc_num first, second;
|
|
int scale = (int)BCG(bc_precision);
|
|
|
|
ZEND_PARSE_PARAMETERS_START(2, 3)
|
|
Z_PARAM_STR(left)
|
|
Z_PARAM_STR(right)
|
|
Z_PARAM_OPTIONAL
|
|
Z_PARAM_LONG(scale_param)
|
|
ZEND_PARSE_PARAMETERS_END();
|
|
|
|
if (ZEND_NUM_ARGS() == 3) {
|
|
scale = (int) ((int)scale_param < 0 ? 0 : scale_param);
|
|
}
|
|
|
|
bc_init_num(&first);
|
|
bc_init_num(&second);
|
|
|
|
bc_str2num(&first, ZSTR_VAL(left), scale);
|
|
bc_str2num(&second, ZSTR_VAL(right), scale);
|
|
RETVAL_LONG(bc_compare(first, second));
|
|
|
|
bc_free_num(&first);
|
|
bc_free_num(&second);
|
|
return;
|
|
}
|
|
/* }}} */
|
|
|
|
/* {{{ proto bool bcscale(int scale)
|
|
Sets default scale parameter for all bc math functions */
|
|
PHP_FUNCTION(bcscale)
|
|
{
|
|
zend_long new_scale;
|
|
|
|
ZEND_PARSE_PARAMETERS_START(1, 1)
|
|
Z_PARAM_LONG(new_scale)
|
|
ZEND_PARSE_PARAMETERS_END();
|
|
|
|
BCG(bc_precision) = ((int)new_scale < 0) ? 0 : new_scale;
|
|
|
|
RETURN_TRUE;
|
|
}
|
|
/* }}} */
|
|
|
|
|
|
#endif
|
|
|
|
/*
|
|
* Local variables:
|
|
* tab-width: 4
|
|
* c-basic-offset: 4
|
|
* End:
|
|
* vim600: sw=4 ts=4 fdm=marker
|
|
* vim<600: sw=4 ts=4
|
|
*/
|