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<?php
namespace Safe;
use Safe\Exceptions\GmpException;
/**
* Calculates the binomial coefficient C(n, k).
*
* @param \GMP|string|int $n Either a GMP number resource in PHP 5.5 and earlier, a GMP object in PHP 5.6 and later, or a numeric string provided that it is possible to convert the latter to a number.
* @param int $k
* @return \GMP Returns the binomial coefficient C(n, k).
* @throws GmpException
*
*/
function gmp_binomial($n, int $k): \GMP
{
error_clear_last();
$result = \gmp_binomial($n, $k);
if ($result === false) {
throw GmpException::createFromPhpError();
}
return $result;
}
/**
* Export a GMP number to a binary string
*
* @param \GMP|string|int $gmpnumber The GMP number being exported
* @param int $word_size Default value is 1. The number of bytes in each chunk of binary data. This is mainly used in conjunction with the options parameter.
* @param int $options Default value is GMP_MSW_FIRST | GMP_NATIVE_ENDIAN.
* @return string Returns a string.
* @throws GmpException
*
*/
function gmp_export($gmpnumber, int $word_size = 1, int $options = GMP_MSW_FIRST | GMP_NATIVE_ENDIAN): string
{
error_clear_last();
$result = \gmp_export($gmpnumber, $word_size, $options);
if ($result === false) {
throw GmpException::createFromPhpError();
}
return $result;
}
/**
* Import a GMP number from a binary string
*
* @param string $data The binary string being imported
* @param int $word_size Default value is 1. The number of bytes in each chunk of binary data. This is mainly used in conjunction with the options parameter.
* @param int $options Default value is GMP_MSW_FIRST | GMP_NATIVE_ENDIAN.
* @return \GMP Returns a GMP number.
* @throws GmpException
*
*/
function gmp_import(string $data, int $word_size = 1, int $options = GMP_MSW_FIRST | GMP_NATIVE_ENDIAN): \GMP
{
error_clear_last();
$result = \gmp_import($data, $word_size, $options);
if ($result === false) {
throw GmpException::createFromPhpError();
}
return $result;
}
/**
*
*
* @param \GMP|string|int $seed The seed to be set for the gmp_random,
* gmp_random_bits, and
* gmp_random_range functions.
*
* Either a GMP number resource in PHP 5.5 and earlier, a GMP object in PHP 5.6 and later, or a numeric string provided that it is possible to convert the latter to a number.
* @throws GmpException
*
*/
function gmp_random_seed($seed): void
{
error_clear_last();
$result = \gmp_random_seed($seed);
if ($result === false) {
throw GmpException::createFromPhpError();
}
}
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