/
math.c
1125 lines (924 loc) · 25.2 KB
/
math.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: Jim Winstead (jimw@php.net) |
| Stig Sæther Bakken <ssb@guardian.no> |
| Zeev Suraski <zeev@zend.com> |
| PHP 4.0 patches by Thies C. Arntzen (thies@thieso.net) |
+----------------------------------------------------------------------+
*/
/* $Id$ */
#include "php.h"
#include "php_math.h"
#include <math.h>
#include <float.h>
#ifndef M_PI
#define M_PI 3.14159265358979323846
#endif
char *_php_math_number_format(double, int, char , char);
/* {{{ proto int abs(int number)
Return the absolute value of the number */
PHP_FUNCTION(abs)
{
zval **value;
if (ZEND_NUM_ARGS()!=1||zend_get_parameters_ex(1, &value)==FAILURE) {
WRONG_PARAM_COUNT;
}
convert_scalar_to_number_ex(value);
if (Z_TYPE_PP(value) == IS_DOUBLE) {
RETURN_DOUBLE(fabs(Z_DVAL_PP(value)));
} else if (Z_TYPE_PP(value) == IS_LONG) {
if (Z_LVAL_PP(value) == LONG_MIN) {
RETURN_DOUBLE(-(double)LONG_MIN);
} else {
RETURN_LONG(Z_LVAL_PP(value) < 0 ? -Z_LVAL_PP(value) : Z_LVAL_PP(value));
}
}
RETURN_FALSE;
}
/* }}} */
/* {{{ proto double ceil(double number)
Returns the next highest integer value of the number */
PHP_FUNCTION(ceil)
{
zval **value;
if (ZEND_NUM_ARGS()!=1||zend_get_parameters_ex(1, &value)==FAILURE) {
WRONG_PARAM_COUNT;
}
convert_scalar_to_number_ex(value);
if (Z_TYPE_PP(value) == IS_DOUBLE) {
RETURN_DOUBLE(ceil(Z_DVAL_PP(value)));
} else if (Z_TYPE_PP(value) == IS_LONG) {
RETURN_LONG(Z_LVAL_PP(value));
}
RETURN_FALSE;
}
/* }}} */
/* {{{ proto double floor(double number)
Returns the next lowest integer value from the number */
PHP_FUNCTION(floor)
{
zval **value;
if (ZEND_NUM_ARGS()!=1||zend_get_parameters_ex(1, &value)==FAILURE) {
WRONG_PARAM_COUNT;
}
convert_scalar_to_number_ex(value);
if (Z_TYPE_PP(value) == IS_DOUBLE) {
RETURN_DOUBLE(floor(Z_DVAL_PP(value)));
} else if (Z_TYPE_PP(value) == IS_LONG) {
RETURN_LONG(Z_LVAL_PP(value));
}
RETURN_FALSE;
}
/* }}} */
/* {{{ proto double round(double number [, int precision])
Returns the number rounded to specified precision. */
PHP_FUNCTION(round)
{
zval **value, **precision;
int places = 0;
double f, return_val;
if (ZEND_NUM_ARGS() < 1 || ZEND_NUM_ARGS() > 2 ||
zend_get_parameters_ex(ZEND_NUM_ARGS(), &value, &precision) == FAILURE) {
WRONG_PARAM_COUNT;
}
if (ZEND_NUM_ARGS() == 2) {
convert_to_long_ex(precision);
places = (int) Z_LVAL_PP(precision);
}
convert_scalar_to_number_ex(value);
switch (Z_TYPE_PP(value)) {
case IS_LONG:
/* Simple case - long that doesn't need to be rounded. */
if (places >= 0) {
RETURN_DOUBLE((double) Z_LVAL_PP(value));
}
/* break omitted intentionally */
case IS_DOUBLE:
return_val = (Z_TYPE_PP(value) == IS_LONG) ?
(double)Z_LVAL_PP(value) : Z_DVAL_PP(value);
f = pow(10.0, places);
return_val *= f;
if (return_val >= 0.0)
return_val = floor(return_val + 0.5);
else
return_val = ceil(return_val - 0.5);
return_val /= f;
RETURN_DOUBLE(return_val);
break;
default:
RETURN_FALSE;
break;
}
}
/* }}} */
/* {{{ proto double sin(double number)
Returns the sine of the number in radians */
PHP_FUNCTION(sin)
{
zval **num;
if (ZEND_NUM_ARGS() != 1 || zend_get_parameters_ex(1, &num) == FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_double_ex(num);
Z_DVAL_P(return_value) = sin(Z_DVAL_PP(num));
Z_TYPE_P(return_value) = IS_DOUBLE;
}
/* }}} */
/* {{{ proto double cos(double number)
Returns the cosine of the number in radians */
PHP_FUNCTION(cos)
{
zval **num;
if (ZEND_NUM_ARGS() != 1 || zend_get_parameters_ex(1, &num) == FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_double_ex(num);
Z_DVAL_P(return_value) = cos(Z_DVAL_PP(num));
Z_TYPE_P(return_value) = IS_DOUBLE;
}
/* }}} */
/* {{{ proto double tan(double number)
Returns the tangent of the number in radians */
PHP_FUNCTION(tan)
{
zval **num;
if (ZEND_NUM_ARGS() != 1 || zend_get_parameters_ex(1, &num) == FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_double_ex(num);
Z_DVAL_P(return_value) = tan(Z_DVAL_PP(num));
Z_TYPE_P(return_value) = IS_DOUBLE;
}
/* }}} */
/* {{{ proto double asin(double number)
Returns the arc sine of the number in radians */
PHP_FUNCTION(asin)
{
zval **num;
if (ZEND_NUM_ARGS() != 1 || zend_get_parameters_ex(1, &num) == FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_double_ex(num);
Z_DVAL_P(return_value) = asin(Z_DVAL_PP(num));
Z_TYPE_P(return_value) = IS_DOUBLE;
}
/* }}} */
/* {{{ proto double acos(double number)
Return the arc cosine of the number in radians */
PHP_FUNCTION(acos)
{
zval **num;
if (ZEND_NUM_ARGS() != 1 || zend_get_parameters_ex(1, &num) == FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_double_ex(num);
Z_DVAL_P(return_value) = acos(Z_DVAL_PP(num));
Z_TYPE_P(return_value) = IS_DOUBLE;
}
/* }}} */
/* {{{ proto double atan(double number)
Returns the arc tangent of the number in radians */
PHP_FUNCTION(atan)
{
zval **num;
if (ZEND_NUM_ARGS() != 1 || zend_get_parameters_ex(1, &num) == FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_double_ex(num);
Z_DVAL_P(return_value) = atan(Z_DVAL_PP(num));
Z_TYPE_P(return_value) = IS_DOUBLE;
}
/* }}} */
/* {{{ proto double atan2(double y, double x)
Returns the arc tangent of y/x, with the resulting quadrant determined by the signs of y and x */
PHP_FUNCTION(atan2)
{
zval **num1, **num2;
if (ZEND_NUM_ARGS() != 2 || zend_get_parameters_ex(2, &num1, &num2) == FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_double_ex(num1);
convert_to_double_ex(num2);
Z_DVAL_P(return_value) = atan2(Z_DVAL_PP(num1), Z_DVAL_PP(num2));
Z_TYPE_P(return_value) = IS_DOUBLE;
}
/* }}} */
/* {{{ proto double sinh(double number)
Returns the hyperbolic sine of the number,
defined as (exp(number) - exp(-number))/2 */
PHP_FUNCTION(sinh)
{
zval **num;
if (ZEND_NUM_ARGS() != 1 || zend_get_parameters_ex(1, &num) == FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_double_ex(num);
Z_DVAL_P(return_value) = sinh(Z_DVAL_PP(num));
Z_TYPE_P(return_value) = IS_DOUBLE;
}
/* }}} */
/* {{{ proto double cosh(double number)
Returns the hyperbolic cosine of the number,
defined as (exp(number) + exp(-number))/2 */
PHP_FUNCTION(cosh)
{
zval **num;
if (ZEND_NUM_ARGS() != 1 || zend_get_parameters_ex(1, &num) == FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_double_ex(num);
Z_DVAL_P(return_value) = cosh(Z_DVAL_PP(num));
Z_TYPE_P(return_value) = IS_DOUBLE;
}
/* }}} */
/* {{{ proto double tanh(double number)
Returns the hyperbolic tangent of the number,
defined as sinh(number)/cosh(number) */
PHP_FUNCTION(tanh)
{
zval **num;
if (ZEND_NUM_ARGS() != 1 || zend_get_parameters_ex(1, &num) == FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_double_ex(num);
Z_DVAL_P(return_value) = tanh(Z_DVAL_PP(num));
Z_TYPE_P(return_value) = IS_DOUBLE;
}
/* }}} */
#ifndef PHP_WIN32
/* {{{ proto double asinh(double number)
Returns the inverse hyperbolic sine of the number,
i.e. the value whose hyperbolic sine is number */
PHP_FUNCTION(asinh)
{
zval **num;
if (ZEND_NUM_ARGS() != 1 || zend_get_parameters_ex(1, &num) == FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_double_ex(num);
Z_DVAL_P(return_value) = asinh(Z_DVAL_PP(num));
Z_TYPE_P(return_value) = IS_DOUBLE;
}
/* }}} */
/* {{{ proto double acosh(double number)
Returns the inverse hyperbolic cosine of the number,
i.e. the value whose hyperbolic cosine is number */
PHP_FUNCTION(acosh)
{
zval **num;
if (ZEND_NUM_ARGS() != 1 || zend_get_parameters_ex(1, &num) == FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_double_ex(num);
Z_DVAL_P(return_value) = acosh(Z_DVAL_PP(num));
Z_TYPE_P(return_value) = IS_DOUBLE;
}
/* }}} */
/* {{{ proto double atanh(double number)
Returns the inverse hyperbolic tangent of the number,
i.e. the value whose hyperbolic tangent is number */
PHP_FUNCTION(atanh)
{
zval **num;
if (ZEND_NUM_ARGS() != 1 || zend_get_parameters_ex(1, &num) == FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_double_ex(num);
Z_DVAL_P(return_value) = atanh(Z_DVAL_PP(num));
Z_TYPE_P(return_value) = IS_DOUBLE;
}
/* }}} */
#endif
/* {{{ proto double pi(void)
Returns an approximation of pi */
PHP_FUNCTION(pi)
{
Z_DVAL_P(return_value) = M_PI;
Z_TYPE_P(return_value) = IS_DOUBLE;
}
/* }}} */
/* {{{ proto number pow(number base, number exponent)
Returns base raised to the power of exponent. Returns
integer result when possible. */
PHP_FUNCTION(pow)
{
/* FIXME: What is our policy on float-overflow? With pow, it's
* extremely easy to request results that won't fit in any double.
*/
zval **zbase, **zexp;
long lbase, lexp;
double dval;
if (ZEND_NUM_ARGS() != 2) {
WRONG_PARAM_COUNT;
}
zend_get_parameters_ex(ZEND_NUM_ARGS(), &zbase, &zexp);
convert_scalar_to_number_ex(zbase);
convert_scalar_to_number_ex(zexp);
if ((Z_TYPE_PP(zbase) != IS_LONG && Z_TYPE_PP(zbase) != IS_DOUBLE) ||
(Z_TYPE_PP(zexp ) != IS_LONG && Z_TYPE_PP(zexp ) != IS_DOUBLE)) {
php_error(E_WARNING, "Invalid argument(s) passed to pow()");
RETURN_FALSE;
}
if (Z_TYPE_PP(zexp) == IS_DOUBLE) {
/* pow(?, float), this is the ^^ case */
convert_to_double_ex(zbase);
if ( Z_DVAL_PP(zbase) <= 0.0 ) {
/* Note that with the old behaviour, php pow() returned bogus
results. Try pow(-1, 2.5) in PHP <= 4.0.6 ... */
php_error(E_WARNING, "Trying to raise a nonpositive value to a broken power");
RETURN_FALSE;
}
RETURN_DOUBLE(exp(log(Z_DVAL_PP(zbase)) * Z_DVAL_PP(zexp)));
}
/* pow(?, int), this is the ** case */
lexp = Z_LVAL_PP(zexp);
if (Z_TYPE_PP(zbase) == IS_DOUBLE) {
/* pow(float, int) */
if (lexp == 0) {
RETURN_DOUBLE(1.0);
}
if (Z_DVAL_PP(zbase) > 0.0) {
RETURN_DOUBLE(exp(log(Z_DVAL_PP(zbase)) * lexp));
} else if (Z_DVAL_PP(zbase) == 0.0) {
if (lexp < 0) {
php_error(E_WARNING,
"Division by zero: pow(0.0, [negative integer])");
RETURN_FALSE;
} else {
RETURN_DOUBLE(0.0);
}
} else { /* lbase < 0.0 */
dval = exp(log(-Z_DVAL_PP(zbase)) * (double)lexp);
RETURN_DOUBLE(lexp & 1 ? -dval : dval);
}
}
/* pow(int, int) */
if (lexp == 0) {
RETURN_LONG(1);
}
lbase = Z_LVAL_PP(zbase);
/* lexp != 0 */
switch (lbase) {
case -1:
RETURN_LONG( lexp & 1 ? -1 : 1 ); /* if lexp=odd ... */
case 0:
if (lexp < 0) {
php_error(E_WARNING,
"Division by zero: pow(0, [negative integer])");
RETURN_FALSE;
} else {
RETURN_LONG(0);
}
case 1:
RETURN_LONG(1);
default:
/* abs(lbase) > 1 */
dval = exp(log(lbase>0? (double)lbase : -(double)lbase ) *
(double) lexp);
if (lexp < 0 || dval > (double) LONG_MAX) {
/* 1/n ( abs(n) > 1 ) || overflow */
RETURN_DOUBLE(((lexp & 1) && lbase<0) ? -dval : dval);
}
Z_TYPE_P(return_value) = IS_LONG;
Z_LVAL_P(return_value) = 1;
/* loop runs at most log(log(LONG_MAX)) times, i.e. ~ 5 */
while (lexp > 0) {
if (lexp & 1) /* odd */
Z_LVAL_P(return_value) *= lbase;
lexp >>= 1;
lbase *= lbase;
}
/* return */
}
}
/* }}} */
/* {{{ proto double exp(double number)
Returns e raised to the power of the number */
PHP_FUNCTION(exp)
{
zval **num;
if (ZEND_NUM_ARGS() != 1 || zend_get_parameters_ex(1, &num) == FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_double_ex(num);
Z_DVAL_P(return_value) = exp(Z_DVAL_PP(num));
Z_TYPE_P(return_value) = IS_DOUBLE;
}
/* }}} */
#ifndef PHP_WIN32
/* {{{ proto double expm1(double number)
Returns exp(number) - 1, computed in a way that accurate even when
the value of number is close to zero
WARNING: this function is expermental: it could change its name or
disappear in the next version of PHP!
*/
PHP_FUNCTION(expm1)
{
zval **num;
if (ZEND_NUM_ARGS() != 1 || zend_get_parameters_ex(1, &num) == FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_double_ex(num);
Z_DVAL_P(return_value) = expm1(Z_DVAL_PP(num));
Z_TYPE_P(return_value) = IS_DOUBLE;
}
/* }}} */
/* {{{ proto double log1p(double number)
Returns log(1 + number), computed in a way that accurate even when
the value of number is close to zero
WARNING: this function is expermental: it could change its name or
disappear in the next version of PHP!
*/
PHP_FUNCTION(log1p)
{
zval **num;
if (ZEND_NUM_ARGS() != 1 || zend_get_parameters_ex(1, &num) == FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_double_ex(num);
Z_DVAL_P(return_value) = log1p(Z_DVAL_PP(num));
Z_TYPE_P(return_value) = IS_DOUBLE;
}
/* }}} */
#endif
/* {{{ proto double log(double number)
Returns the natural logarithm of the number */
PHP_FUNCTION(log)
{
zval **num;
if (ZEND_NUM_ARGS() != 1 || zend_get_parameters_ex(1, &num) == FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_double_ex(num);
Z_DVAL_P(return_value) = log(Z_DVAL_PP(num));
Z_TYPE_P(return_value) = IS_DOUBLE;
}
/* }}} */
/* {{{ proto double log10(double number)
Returns the base-10 logarithm of the number */
PHP_FUNCTION(log10)
{
zval **num;
if (ZEND_NUM_ARGS() != 1 || zend_get_parameters_ex(1, &num) == FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_double_ex(num);
Z_DVAL_P(return_value) = log10(Z_DVAL_PP(num));
Z_TYPE_P(return_value) = IS_DOUBLE;
}
/* }}} */
/* {{{ proto double sqrt(double number)
Returns the square root of the number */
PHP_FUNCTION(sqrt)
{
zval **num;
if (ZEND_NUM_ARGS() != 1 || zend_get_parameters_ex(1, &num) == FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_double_ex(num);
Z_DVAL_P(return_value) = sqrt(Z_DVAL_PP(num));
Z_TYPE_P(return_value) = IS_DOUBLE;
}
/* }}} */
/* {{{ proto double hypot(double num1, double num2)
Returns sqrt( num1*num1 + num2*num2)
WARNING: this function is expermental: it could change its name or
disappear in the next version of PHP!
*/
PHP_FUNCTION(hypot)
{
zval **num1, **num2;
if (ZEND_NUM_ARGS() != 2 || zend_get_parameters_ex(2, &num1, &num2) == FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_double_ex(num1);
convert_to_double_ex(num2);
Z_DVAL_P(return_value) = hypot((*num1)->value.dval, (*num2)->value.dval);
Z_TYPE_P(return_value) = IS_DOUBLE;
}
/* }}} */
/* {{{ proto double deg2rad(double number)
Converts the number in degrees to the radian equivalent */
PHP_FUNCTION(deg2rad)
{
zval **deg;
if (ZEND_NUM_ARGS() != 1 || zend_get_parameters_ex(1, °) == FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_double_ex(deg);
RETVAL_DOUBLE((Z_DVAL_PP(deg) / 180.0) * M_PI);
}
/* }}} */
/* {{{ proto double rad2deg(double number)
Converts the radian number to the equivalent number in degrees */
PHP_FUNCTION(rad2deg)
{
zval **rad;
if (ZEND_NUM_ARGS() != 1 || zend_get_parameters_ex(1, &rad) == FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_double_ex(rad);
RETVAL_DOUBLE((Z_DVAL_PP(rad) / M_PI) * 180);
}
/* }}} */
/* {{{ _php_math_basetolong */
/*
* Convert a string representation of a base(2-36) number to a long.
*/
PHPAPI long
_php_math_basetolong(zval *arg, int base) {
long mult = 1, num = 0, digit;
int i;
char c, *s;
if (Z_TYPE_P(arg) != IS_STRING || base < 2 || base > 36) {
return 0;
}
s = Z_STRVAL_P(arg);
for (i = Z_STRLEN_P(arg) - 1; i >= 0; i--, mult *= base) {
c = toupper(s[i]);
if (c >= '0' && c <= '9') {
digit = (c - '0');
} else if (c >= 'A' && c <= 'Z') {
digit = (c - 'A' + 10);
} else {
continue;
}
if (digit >= base) {
continue;
}
if(!mult || digit > LONG_MAX/mult || num > LONG_MAX-mult*digit) {
php_error(E_WARNING, "base_to_long: number '%s' is too big to fit in long", s);
return LONG_MAX;
}
num += mult * digit;
}
return num;
}
/* }}} */
/* {{{ _php_math_longtobase */
/* {{{ _php_math_basetozval */
/*
* Convert a string representation of a base(2-36) number to a zval.
*/
PHPAPI int
_php_math_basetozval(zval *arg, int base, zval *ret) {
long mult = 1, num = 0, digit;
double fmult, fnum;
int i;
int f_mode = 0;
char c, *s;
if (Z_TYPE_P(arg) != IS_STRING || base < 2 || base > 36) {
return FAILURE;
}
s = Z_STRVAL_P(arg);
for (i = Z_STRLEN_P(arg) - 1; i >= 0; i--) {
c = toupper(s[i]);
if (c >= '0' && c <= '9') {
digit = (c - '0');
} else if (c >= 'A' && c <= 'Z') {
digit = (c - 'A' + 10);
} else {
continue;
}
if (digit >= base) {
continue;
}
if(!f_mode && (!mult || digit > LONG_MAX/mult || num > LONG_MAX-mult*digit)) {
f_mode = 1;
if(!mult) {
fmult = ULONG_MAX + 1;
} else {
fmult = (unsigned long)mult;
}
fnum = (unsigned long)num;
}
if(f_mode) {
fnum += fmult * digit;
fmult *= base;
} else {
num += mult * digit;
mult *= base;
}
}
if(f_mode) {
ZVAL_DOUBLE(ret, fnum);
} else {
ZVAL_LONG(ret, num);
}
return SUCCESS;
}
/* }}} */
/* {{{ _php_math_longtobase */
/*
* Convert a long to a string containing a base(2-36) representation of
* the number.
*/
PHPAPI char *
_php_math_longtobase(zval *arg, int base)
{
static char digits[] = "0123456789abcdefghijklmnopqrstuvwxyz";
char *result, *ptr, *ret;
int len, digit;
unsigned long value;
if (Z_TYPE_P(arg) != IS_LONG || base < 2 || base > 36) {
return empty_string;
}
value = Z_LVAL_P(arg);
/* allocates space for the longest possible result with the lowest base */
len = (sizeof(Z_LVAL_P(arg)) * 8) + 1;
result = emalloc((sizeof(Z_LVAL_P(arg)) * 8) + 1);
ptr = result + len - 1;
*ptr-- = '\0';
do {
digit = value % base;
*ptr = digits[digit];
value /= base;
}
while (ptr-- > result && value);
ptr++;
ret = estrdup(ptr);
efree(result);
return ret;
}
/* }}} */
/* {{{ _php_math_zvaltobase */
/*
* Convert a zval to a string containing a base(2-36) representation of
* the number.
*/
PHPAPI char *
_php_math_zvaltobase(zval *arg, int base)
{
static char digits[] = "0123456789abcdefghijklmnopqrstuvwxyz";
char *result, *ptr, *ret;
int len, digit;
unsigned long value;
double fvalue;
int f_mode;
if ((Z_TYPE_P(arg) != IS_LONG && Z_TYPE_P(arg) != IS_DOUBLE) || base < 2 || base > 36) {
return empty_string;
}
f_mode = (Z_TYPE_P(arg) == IS_DOUBLE);
if(f_mode) {
fvalue = floor(Z_DVAL_P(arg)); /* floor it just in case */
} else {
value = Z_LVAL_P(arg);
}
/* allocates space for the longest possible result with the lowest base */
len = (sizeof(Z_DVAL_P(arg)) * 8) + 1;
result = emalloc((sizeof(Z_DVAL_P(arg)) * 8) + 1);
ptr = result + len - 1;
*ptr-- = '\0';
do {
if(f_mode) {
double d = floor(fvalue/base);
digit = (int)ceil(fvalue - d*base);
*ptr = digits[digit];
fvalue = d;
} else {
digit = value % base;
*ptr = digits[digit];
value /= base;
}
}
while (ptr-- > result && (f_mode?(fabs(fvalue)>=1):value));
ptr++;
ret = estrdup(ptr);
efree(result);
return ret;
}
/* }}} */
/* {{{ proto int bindec(string binary_number)
Returns the decimal equivalent of the binary number */
PHP_FUNCTION(bindec)
{
zval **arg;
if (ZEND_NUM_ARGS() != 1 || zend_get_parameters_ex(1, &arg) == FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_string_ex(arg);
if(_php_math_basetozval(*arg, 2, return_value) != SUCCESS) {
RETURN_FALSE;
}
}
/* }}} */
/* {{{ proto int hexdec(string hexadecimal_number)
Returns the decimal equivalent of the hexadecimal number */
PHP_FUNCTION(hexdec)
{
zval **arg;
if (ZEND_NUM_ARGS() != 1 || zend_get_parameters_ex(1, &arg) == FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_string_ex(arg);
if(_php_math_basetozval(*arg, 16, return_value) != SUCCESS) {
RETURN_FALSE;
}
}
/* }}} */
/* {{{ proto int octdec(string octal_number)
Returns the decimal equivalent of an octal string */
PHP_FUNCTION(octdec)
{
zval **arg;
if (ZEND_NUM_ARGS() != 1 || zend_get_parameters_ex(1, &arg) == FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_string_ex(arg);
if(_php_math_basetozval(*arg, 8, return_value) != SUCCESS) {
RETURN_FALSE;
}
}
/* }}} */
/* {{{ proto string decbin(int decimal_number)
Returns a string containing a binary representation of the number */
PHP_FUNCTION(decbin)
{
zval **arg;
char *result;
if (ZEND_NUM_ARGS() != 1 || zend_get_parameters_ex(1, &arg) == FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_long_ex(arg);
result = _php_math_longtobase(*arg, 2);
Z_TYPE_P(return_value) = IS_STRING;
Z_STRLEN_P(return_value) = strlen(result);
Z_STRVAL_P(return_value) = result;
}
/* }}} */
/* {{{ proto string decoct(int decimal_number)
Returns a string containing an octal representation of the given number */
PHP_FUNCTION(decoct)
{
zval **arg;
char *result;
if (ZEND_NUM_ARGS() != 1 || zend_get_parameters_ex(1, &arg) == FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_long_ex(arg);
result = _php_math_longtobase(*arg, 8);
Z_TYPE_P(return_value) = IS_STRING;
Z_STRLEN_P(return_value) = strlen(result);
Z_STRVAL_P(return_value) = result;
}
/* }}} */
/* {{{ proto string dechex(int decimal_number)
Returns a string containing a hexadecimal representation of the given number */
PHP_FUNCTION(dechex)
{
zval **arg;
char *result;
if (ZEND_NUM_ARGS() != 1 || zend_get_parameters_ex(1, &arg) == FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_long_ex(arg);
result = _php_math_longtobase(*arg, 16);
Z_TYPE_P(return_value) = IS_STRING;
Z_STRLEN_P(return_value) = strlen(result);
Z_STRVAL_P(return_value) = result;
}
/* }}} */
/* {{{ proto string base_convert(string number, int frombase, int tobase)
Converts a number in a string from any base <= 36 to any base <= 36.
*/
PHP_FUNCTION(base_convert)
{
zval **number, **frombase, **tobase, temp;
char *result;
if (ZEND_NUM_ARGS() != 3 || zend_get_parameters_ex(3, &number, &frombase, &tobase) == FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_string_ex(number);
convert_to_long_ex(frombase);
convert_to_long_ex(tobase);
if (Z_LVAL_PP(frombase) < 2 || Z_LVAL_PP(frombase) > 36) {
php_error(E_WARNING, "base_convert: invalid `from base' (%d)", Z_LVAL_PP(frombase));
RETURN_FALSE;
}
if (Z_LVAL_PP(tobase) < 2 || Z_LVAL_PP(tobase) > 36) {
php_error(E_WARNING, "base_convert: invalid `to base' (%d)", Z_LVAL_PP(tobase));
RETURN_FALSE;
}