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math.c
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math.c
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/*
+----------------------------------------------------------------------+
| PHP Version 4 |
+----------------------------------------------------------------------+
| Copyright (c) 1997-2003 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@fast.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 "zend_multiply.h"
#include <math.h>
#include <float.h>
#include <stdlib.h>
#ifndef M_PI
#define M_PI 3.14159265358979323846
#endif
#ifndef PHP_ROUND_FUZZ
# ifndef PHP_WIN32
# define PHP_ROUND_FUZZ 0.50000000001
# else
# define PHP_ROUND_FUZZ 0.5
# endif
#endif
#define PHP_ROUND_WITH_FUZZ(val, places) { \
double tmp_val=val, f = pow(10.0, (double) places); \
tmp_val *= f; \
if (tmp_val >= 0.0) { \
tmp_val = floor(tmp_val + PHP_ROUND_FUZZ); \
} else { \
tmp_val = ceil(tmp_val - PHP_ROUND_FUZZ); \
} \
tmp_val /= f; \
val = !zend_isnan(tmp_val) ? tmp_val : val; \
} \
/* {{{ 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 float ceil(float 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) {
convert_to_double_ex(value);
RETURN_DOUBLE(Z_DVAL_PP(value));
}
RETURN_FALSE;
}
/* }}} */
/* {{{ proto float floor(float 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) {
convert_to_double_ex(value);
RETURN_DOUBLE(Z_DVAL_PP(value));
}
RETURN_FALSE;
}
/* }}} */
/* {{{ proto float round(float number [, int precision])
Returns the number rounded to specified precision */
PHP_FUNCTION(round)
{
zval **value, **precision;
int places = 0;
double 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);
PHP_ROUND_WITH_FUZZ(return_val, places);
RETURN_DOUBLE(return_val);
break;
default:
RETURN_FALSE;
break;
}
}
/* }}} */
/* {{{ proto float sin(float 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 float cos(float 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 float tan(float 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 float asin(float 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 float acos(float 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 float atan(float 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 float atan2(float y, float 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 float sinh(float 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 float cosh(float 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 float tanh(float 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
#ifdef HAVE_ASINH
/* {{{ proto float asinh(float 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;
}
/* }}} */
#endif /* HAVE_ASINH */
#ifdef HAVE_ACOSH
/* {{{ proto float acosh(float 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;
}
/* }}} */
#endif /* HAVE_ACOSH */
#ifdef HAVE_ATANH
/* {{{ proto float atanh(float 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 /* HAVE_ATANH */
#endif /* ifndf PHP_WIN32 */
/* {{{ proto float 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 bool is_finite(float val)
Returns whether argument is finite */
PHP_FUNCTION(is_finite)
{
double dval;
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "d", &dval) == FAILURE) {
return;
}
RETURN_BOOL(zend_finite(dval));
}
/* }}} */
/* {{{ proto bool is_infinite(float val)
Returns whether argument is infinite */
PHP_FUNCTION(is_infinite)
{
double dval;
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "d", &dval) == FAILURE) {
return;
}
RETURN_BOOL(zend_isinf(dval));
}
/* }}} */
/* {{{ proto bool is_nan(float val)
Returns whether argument is not a number */
PHP_FUNCTION(is_nan)
{
double dval;
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "d", &dval) == FAILURE) {
return;
}
RETURN_BOOL(zend_isnan(dval));
}
/* }}} */
/* {{{ proto number pow(number base, number exponent)
Returns base raised to the power of exponent. Returns integer result when possible */
PHP_FUNCTION(pow)
{
zval *zbase, *zexp;
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "z/z/", &zbase, &zexp) == FAILURE) {
return;
}
/* make sure we're dealing with numbers */
convert_scalar_to_number(zbase TSRMLS_CC);
convert_scalar_to_number(zexp TSRMLS_CC);
/* if both base and exponent were longs, we'll try to get a long out */
if (Z_TYPE_P(zbase) == IS_LONG && Z_TYPE_P(zexp) == IS_LONG && Z_LVAL_P(zexp) >= 0) {
long l1 = 1, l2 = Z_LVAL_P(zbase), i = Z_LVAL_P(zexp);
if (i == 0) {
RETURN_LONG(1L);
} else if (l2 == 0) {
RETURN_LONG(0);
}
/* calculate pow(long,long) in O(log exp) operations, bail if overflow */
while (i >= 1) {
int overflow;
double dval;
if (i % 2) {
--i;
ZEND_SIGNED_MULTIPLY_LONG(l1,l2,l1,dval,overflow);
if (overflow) RETURN_DOUBLE(dval * pow(l2,i));
} else {
i /= 2;
ZEND_SIGNED_MULTIPLY_LONG(l2,l2,l2,dval,overflow);
if (overflow) RETURN_DOUBLE((double)l1 * pow(dval,i));
}
if (i == 0) {
RETURN_LONG(l1);
}
}
}
convert_to_double(zbase);
convert_to_double(zexp);
RETURN_DOUBLE( pow(Z_DVAL_P(zbase),Z_DVAL_P(zexp)) );
}
/* }}} */
/* {{{ proto float exp(float 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;
}
/* }}} */
#if !defined(PHP_WIN32) && !defined(NETWARE)
/* {{{ proto float expm1(float 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 float log1p(float 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)
{
#ifdef HAVE_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
}
/* }}} */
#endif
/* {{{ proto float log(float number, [float base])
Returns the natural logarithm of the number, or the base log if base is specified */
PHP_FUNCTION(log)
{
zval **num, **base;
switch (ZEND_NUM_ARGS()) {
case 1:
if (zend_get_parameters_ex(1, &num) == FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_double_ex(num);
RETURN_DOUBLE(log(Z_DVAL_PP(num)));
case 2:
if (zend_get_parameters_ex(2, &num, &base) == FAILURE) {
WRONG_PARAM_COUNT;
}
convert_to_double_ex(num);
convert_to_double_ex(base);
if (Z_DVAL_PP(base) <= 0.0) {
php_error_docref(NULL TSRMLS_CC, E_WARNING, "base must be greater than 0");
RETURN_FALSE;
}
RETURN_DOUBLE(log(Z_DVAL_PP(num)) / log(Z_DVAL_PP(base)));
default:
WRONG_PARAM_COUNT;
}
}
/* }}} */
/* {{{ proto float log10(float 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 float sqrt(float 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 float hypot(float num1, float num2)
Returns sqrt(num1*num1 + num2*num2) */
#ifdef HAVE_HYPOT
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(Z_DVAL_PP(num1), Z_DVAL_PP(num2));
Z_TYPE_P(return_value) = IS_DOUBLE;
}
#endif
/* }}} */
/* {{{ proto float deg2rad(float 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 float rad2deg(float 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 num = 0, digit, onum;
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); i > 0; i--) {
c = *s++;
digit = (c >= '0' && c <= '9') ? c - '0'
: (c >= 'A' && c <= 'Z') ? c - 'A' + 10
: (c >= 'a' && c <= 'z') ? c - 'a' + 10
: base;
if (digit >= base) {
continue;
}
onum = num;
num = num * base + digit;
if (num > onum)
continue;
{
TSRMLS_FETCH();
php_error_docref(NULL TSRMLS_CC, E_WARNING, "Number '%s' is too big to fit in long", s);
return LONG_MAX;
}
}
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 num = 0;
double fnum = 0;
int i;
int mode = 0;
char c, *s;
long cutoff;
int cutlim;
if (Z_TYPE_P(arg) != IS_STRING || base < 2 || base > 36) {
return FAILURE;
}
s = Z_STRVAL_P(arg);
cutoff = LONG_MAX / base;
cutlim = LONG_MAX % base;
for (i = Z_STRLEN_P(arg); i > 0; i--) {
c = *s++;
/* might not work for EBCDIC */
if (c >= '0' && c <= '9')
c -= '0';
else if (c >= 'A' && c <= 'Z')
c -= 'A' - 10;
else if (c >= 'a' && c <= 'z')
c -= 'a' - 10;
else
continue;
if (c >= base)
continue;
switch (mode) {
case 0: /* Integer */
if (num < cutoff || (num == cutoff && c <= cutlim)) {
num = num * base + c;
break;
} else {
fnum = num;
mode = 1;
}
/* fall-through */
case 1: /* Float */
fnum = fnum * base + c;
}
}
if (mode == 1) {
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 buf[(sizeof(unsigned long) << 3) + 1];
char *ptr, *end;
unsigned long value;
if (Z_TYPE_P(arg) != IS_LONG || base < 2 || base > 36) {
return empty_string;
}
value = Z_LVAL_P(arg);
end = ptr = buf + sizeof(buf) - 1;
*ptr = '\0';
do {
*--ptr = digits[value % base];
value /= base;
} while (ptr > buf && value);
return estrndup(ptr, end - ptr);
}
/* }}} */
/* {{{ _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 TSRMLS_DC)
{
static char digits[] = "0123456789abcdefghijklmnopqrstuvwxyz";
if ((Z_TYPE_P(arg) != IS_LONG && Z_TYPE_P(arg) != IS_DOUBLE) || base < 2 || base > 36) {
return empty_string;
}
if (Z_TYPE_P(arg) == IS_DOUBLE) {
double fvalue = floor(Z_DVAL_P(arg)); /* floor it just in case */
char *ptr, *end;
char buf[(sizeof(double) << 3) + 1];
/* Don't try to convert +/- infinity */
if (fvalue == HUGE_VAL || fvalue == -HUGE_VAL) {
php_error_docref(NULL TSRMLS_CC, E_WARNING, "Number too large");
return empty_string;
}
end = ptr = buf + sizeof(buf) - 1;
*ptr = '\0';
do {
*--ptr = digits[(int) fmod(fvalue, base)];
fvalue /= base;
} while (ptr > buf && fabs(fvalue) >= 1);
return estrndup(ptr, end - ptr);
}
return _php_math_longtobase(arg, base);
}
/* }}} */
/* {{{ 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_docref(NULL TSRMLS_CC, E_WARNING, "Invalid `from base' (%ld)", Z_LVAL_PP(frombase));
RETURN_FALSE;
}
if (Z_LVAL_PP(tobase) < 2 || Z_LVAL_PP(tobase) > 36) {
php_error_docref(NULL TSRMLS_CC, E_WARNING, "Invalid `to base' (%ld)", Z_LVAL_PP(tobase));
RETURN_FALSE;
}
if(_php_math_basetozval(*number, Z_LVAL_PP(frombase), &temp) != SUCCESS) {
RETURN_FALSE;
}
result = _php_math_zvaltobase(&temp, Z_LVAL_PP(tobase) TSRMLS_CC);
RETVAL_STRING(result, 0);
}