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