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php-src/ext/bcmath/bcmath.c

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/*
+----------------------------------------------------------------------+
| PHP version 4.0 |
+----------------------------------------------------------------------+
| Copyright (c) 1997-2001 The PHP Group |
+----------------------------------------------------------------------+
| This source file is subject to version 2.02 of the PHP license, |
| that is bundled with this package in the file LICENSE, and is |
| available at through the world-wide-web at |
| http://www.php.net/license/2_02.txt. |
| If you did not receive a copy of the PHP license and are unable to |
| obtain it through the world-wide-web, please send a note to |
| license@php.net so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Authors: Andi Gutmans <andi@zend.com> |
+----------------------------------------------------------------------+
*/
/* $Id$ */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "php.h"
#if WITH_BCMATH
#include "ext/standard/info.h"
#include "php_bcmath.h"
#include "ext/bcmath/libbcmath/src/bcmath.h"
function_entry bcmath_functions[] = {
PHP_FE(bcadd, NULL)
PHP_FE(bcsub, NULL)
PHP_FE(bcmul, NULL)
PHP_FE(bcdiv, NULL)
PHP_FE(bcmod, NULL)
PHP_FE(bcpow, NULL)
PHP_FE(bcsqrt, NULL)
PHP_FE(bcscale, NULL)
PHP_FE(bccomp, NULL)
{NULL, NULL, NULL}
};
zend_module_entry bcmath_module_entry = {
"bcmath",
bcmath_functions,
PHP_MINIT(bcmath),
PHP_MSHUTDOWN(bcmath),
PHP_RINIT(bcmath),
NULL,
PHP_MINFO(bcmath),
STANDARD_MODULE_PROPERTIES
};
#ifdef COMPILE_DL_BCMATH
ZEND_GET_MODULE(bcmath)
#endif
#ifndef THREAD_SAFE
static long bc_precision;
#endif
/* Storage used for special numbers. */
bc_num _zero_;
bc_num _one_;
bc_num _two_;
/* Make a copy of a number! Just increments the reference count! */
bc_num copy_num (bc_num num)
{
num->n_refs++;
return num;
}
/* Initialize a number NUM by making it a copy of zero. */
void init_num (bc_num *num)
{
*num = copy_num (_zero_);
}
PHP_MINIT_FUNCTION(bcmath)
{
extern bc_num _zero_;
extern bc_num _one_;
extern bc_num _two_;
_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;
persist_alloc(_zero_);
persist_alloc(_one_);
persist_alloc(_two_);
persist_alloc(_zero_->n_ptr);
persist_alloc(_one_->n_ptr);
persist_alloc(_two_->n_ptr);
return SUCCESS;
}
PHP_MSHUTDOWN_FUNCTION(bcmath)
{
bc_free_num(&_zero_);
bc_free_num(&_one_);
bc_free_num(&_two_);
return SUCCESS;
}
PHP_RINIT_FUNCTION(bcmath)
{
if (cfg_get_long("bcmath.scale", &bc_precision)==FAILURE) {
bc_precision=0;
}
return SUCCESS;
}
PHP_MINFO_FUNCTION(bcmath)
{
php_info_print_table_start();
php_info_print_table_row(2, "BCMath support", "enabled");
php_info_print_table_end();
}
/* {{{ proto string bcadd(string left_operand, string right_operand [, int scale])
Returns the sum of two arbitrary precision numbers */
PHP_FUNCTION(bcadd)
{
pval **left, **right, **scale_param;
bc_num first, second, result;
int scale=bc_precision;
switch (ZEND_NUM_ARGS()) {
case 2:
if (zend_get_parameters_ex(2, &left, &right) == FAILURE) {
WRONG_PARAM_COUNT;
}
break;
case 3:
if (zend_get_parameters_ex(3, &left, &right, &scale_param) == FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_long_ex(scale_param);
scale = (int) Z_LVAL_PP(scale_param);
break;
default:
WRONG_PARAM_COUNT;
break;
}
convert_to_string_ex(left);
convert_to_string_ex(right);
bc_init_num(&first);
bc_init_num(&second);
bc_init_num(&result);
bc_str2num(&first, Z_STRVAL_PP(left), scale);
bc_str2num(&second, Z_STRVAL_PP(right), scale);
bc_add (first, second, &result, scale);
Z_STRVAL_P(return_value) = bc_num2str(result);
Z_STRLEN_P(return_value) = strlen(Z_STRVAL_P(return_value));
Z_TYPE_P(return_value) = IS_STRING;
bc_free_num(&first);
bc_free_num(&second);
bc_free_num(&result);
return;
}
/* }}} */
/* {{{ proto string bcsub(string left_operand, string right_operand [, int scale])
Returns the difference between two arbitrary precision numbers */
PHP_FUNCTION(bcsub)
{
pval **left, **right, **scale_param;
bc_num first, second, result;
int scale=bc_precision;
switch (ZEND_NUM_ARGS()) {
case 2:
if (zend_get_parameters_ex(2, &left, &right) == FAILURE) {
WRONG_PARAM_COUNT;
}
break;
case 3:
if (zend_get_parameters_ex(3, &left, &right, &scale_param) == FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_long_ex(scale_param);
scale = (int) Z_LVAL_PP(scale_param);
break;
default:
WRONG_PARAM_COUNT;
break;
}
convert_to_string_ex(left);
convert_to_string_ex(right);
bc_init_num(&first);
bc_init_num(&second);
bc_init_num(&result);
bc_str2num(&first, Z_STRVAL_PP(left), scale);
bc_str2num(&second, Z_STRVAL_PP(right), scale);
bc_sub (first, second, &result, scale);
Z_STRVAL_P(return_value) = bc_num2str(result);
Z_STRLEN_P(return_value) = strlen(Z_STRVAL_P(return_value));
Z_TYPE_P(return_value) = IS_STRING;
bc_free_num(&first);
bc_free_num(&second);
bc_free_num(&result);
return;
}
/* }}} */
/* {{{ proto string bcmul(string left_operand, string right_operand [, int scale])
Returns the multiplication of two arbitrary precision numbers */
PHP_FUNCTION(bcmul)
{
pval **left, **right, **scale_param;
bc_num first, second, result;
int scale=bc_precision;
switch (ZEND_NUM_ARGS()) {
case 2:
if (zend_get_parameters_ex(2, &left, &right) == FAILURE) {
WRONG_PARAM_COUNT;
}
break;
case 3:
if (zend_get_parameters_ex(3, &left, &right, &scale_param) == FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_long_ex(scale_param);
scale = (int) Z_LVAL_PP(scale_param);
break;
default:
WRONG_PARAM_COUNT;
break;
}
convert_to_string_ex(left);
convert_to_string_ex(right);
bc_init_num(&first);
bc_init_num(&second);
bc_init_num(&result);
bc_str2num(&first, Z_STRVAL_PP(left), scale);
bc_str2num(&second, Z_STRVAL_PP(right), scale);
bc_multiply (first, second, &result, scale);
Z_STRVAL_P(return_value) = bc_num2str(result);
Z_STRLEN_P(return_value) = strlen(Z_STRVAL_P(return_value));
Z_TYPE_P(return_value) = IS_STRING;
bc_free_num(&first);
bc_free_num(&second);
bc_free_num(&result);
return;
}
/* }}} */
/* {{{ proto string bcdiv(string left_operand, string right_operand [, int scale])
Returns the quotient of two arbitrary precision numbers (division) */
PHP_FUNCTION(bcdiv)
{
pval **left, **right, **scale_param;
bc_num first, second, result;
int scale=bc_precision;
switch (ZEND_NUM_ARGS()) {
case 2:
if (zend_get_parameters_ex(2, &left, &right) == FAILURE) {
WRONG_PARAM_COUNT;
}
break;
case 3:
if (zend_get_parameters_ex(3, &left, &right, &scale_param) == FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_long_ex(scale_param);
scale = (int) Z_LVAL_PP(scale_param);
break;
default:
WRONG_PARAM_COUNT;
break;
}
convert_to_string_ex(left);
convert_to_string_ex(right);
bc_init_num(&first);
bc_init_num(&second);
bc_init_num(&result);
bc_str2num(&first, Z_STRVAL_PP(left), scale);
bc_str2num(&second, Z_STRVAL_PP(right), scale);
switch (bc_divide (first, second, &result, scale)) {
case 0: /* OK */
Z_STRVAL_P(return_value) = bc_num2str(result);
Z_STRLEN_P(return_value) = strlen(Z_STRVAL_P(return_value));
Z_TYPE_P(return_value) = IS_STRING;
break;
case -1: /* division by zero */
php_error(E_WARNING, "Division by zero");
break;
}
bc_free_num(&first);
bc_free_num(&second);
bc_free_num(&result);
return;
}
/* }}} */
/* {{{ proto string bcmod(string left_operand, string right_operand)
Returns the modulus of the two arbitrary precision operands */
PHP_FUNCTION(bcmod)
{
pval **left, **right;
bc_num first, second, result;
switch (ZEND_NUM_ARGS()) {
case 2:
if (zend_get_parameters_ex(2, &left, &right) == FAILURE) {
WRONG_PARAM_COUNT;
}
break;
default:
WRONG_PARAM_COUNT;
break;
}
convert_to_string_ex(left);
convert_to_string_ex(right);
bc_init_num(&first);
bc_init_num(&second);
bc_init_num(&result);
bc_str2num(&first, Z_STRVAL_PP(left), 0);
bc_str2num(&second, Z_STRVAL_PP(right), 0);
switch (bc_modulo(first, second, &result, 0)) {
case 0:
Z_STRVAL_P(return_value) = bc_num2str(result);
Z_STRLEN_P(return_value) = strlen(Z_STRVAL_P(return_value));
Z_TYPE_P(return_value) = IS_STRING;
break;
case -1:
php_error(E_WARNING, "Division by zero");
break;
}
bc_free_num(&first);
bc_free_num(&second);
bc_free_num(&result);
return;
}
/* }}} */
/* {{{ proto string bcpow(string x, string y [, int scale])
Returns the value of an arbitrary precision number raised to the power of another */
PHP_FUNCTION(bcpow)
{
pval **left, **right, **scale_param;
bc_num first, second, result;
int scale=bc_precision;
switch (ZEND_NUM_ARGS()) {
case 2:
if (zend_get_parameters_ex(2, &left, &right) == FAILURE) {
WRONG_PARAM_COUNT;
}
break;
case 3:
if (zend_get_parameters_ex(3, &left, &right, &scale_param) == FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_long_ex(scale_param);
scale = (int) Z_LVAL_PP(scale_param);
break;
default:
WRONG_PARAM_COUNT;
break;
}
convert_to_string_ex(left);
convert_to_string_ex(right);
bc_init_num(&first);
bc_init_num(&second);
bc_init_num(&result);
bc_str2num(&first, Z_STRVAL_PP(left), scale);
bc_str2num(&second, Z_STRVAL_PP(right), scale);
bc_raise (first, second, &result, scale);
Z_STRVAL_P(return_value) = bc_num2str(result);
Z_STRLEN_P(return_value) = strlen(Z_STRVAL_P(return_value));
Z_TYPE_P(return_value) = IS_STRING;
bc_free_num(&first);
bc_free_num(&second);
bc_free_num(&result);
return;
}
/* }}} */
/* {{{ proto string bcsqrt(string operand [, int scale])
Returns the square root of an arbitray precision number */
PHP_FUNCTION(bcsqrt)
{
pval **left, **scale_param;
bc_num result;
int scale=bc_precision;
switch (ZEND_NUM_ARGS()) {
case 1:
if (zend_get_parameters_ex(1, &left)== FAILURE) {
WRONG_PARAM_COUNT;
}
break;
case 2:
if (zend_get_parameters_ex(2, &left, &scale_param) == FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_long_ex(scale_param);
scale = (int) Z_LVAL_PP(scale_param);
break;
default:
WRONG_PARAM_COUNT;
break;
}
convert_to_string_ex(left);
bc_init_num(&result);
bc_str2num(&result, Z_STRVAL_PP(left), scale);
if (bc_sqrt (&result, scale) != 0) {
Z_STRVAL_P(return_value) = bc_num2str(result);
Z_STRLEN_P(return_value) = strlen(Z_STRVAL_P(return_value));
Z_TYPE_P(return_value) = IS_STRING;
} else {
php_error(E_WARNING, "Square root of negative number");
}
bc_free_num(&result);
return;
}
/* }}} */
/* {{{ proto string bccomp(string left_operand, string right_operand [, int scale])
Compares two arbitrary precision numbers */
PHP_FUNCTION(bccomp)
{
pval **left, **right, **scale_param;
bc_num first, second;
int scale=bc_precision;
switch (ZEND_NUM_ARGS()) {
case 2:
if (zend_get_parameters_ex(2, &left, &right) == FAILURE) {
WRONG_PARAM_COUNT;
}
break;
case 3:
if (zend_get_parameters_ex(3, &left, &right, &scale_param) == FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_long_ex(scale_param);
scale = (int) Z_LVAL_PP(scale_param);
break;
default:
WRONG_PARAM_COUNT;
break;
}
convert_to_string_ex(left);
convert_to_string_ex(right);
bc_init_num(&first);
bc_init_num(&second);
bc_str2num(&first, Z_STRVAL_PP(left), scale);
bc_str2num(&second, Z_STRVAL_PP(right), scale);
Z_LVAL_P(return_value) = bc_compare(first, second);
Z_TYPE_P(return_value) = IS_LONG;
bc_free_num(&first);
bc_free_num(&second);
return;
}
/* }}} */
/* {{{ proto string bcscale(int scale)
Sets default scale parameter for all bc math functions */
PHP_FUNCTION(bcscale)
{
pval **new_scale;
if (ZEND_NUM_ARGS()!=1 || zend_get_parameters_ex(1, &new_scale)==FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_long_ex(new_scale);
bc_precision = Z_LVAL_PP(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
*/
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