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868 daniel-mar 1 
<?php
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declare(strict_types=1);
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namespace aywan\JsonCanonicalization;
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/**
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 * @internal
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 */
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class Utils
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{
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    public static function isAssoc(array $a): bool
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    {
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        return [] !== $a && array_keys($a) !== range(0, count($a) - 1);
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    }
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    public static function asHex(string $data): string
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    {
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        return rtrim(chunk_split(bin2hex($data), 2, ' '));
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    }
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    public static function es6NumberFormat(float $number): string
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    {
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        if (is_nan($number) || is_infinite($number)) {
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            throw new \RuntimeException("can't use Nan or Infinity in json");
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        }
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        if (0.0 === $number) {
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            return '0';
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        }
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        $sign = '';
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        if ($number < 0) {
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            $sign = '-';
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            $number = -$number;
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        }
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        if ($number < 1e+21 && $number >= 1e-6) {
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            $formatted = sprintf('%F', $number);
1319 daniel-mar 40 
            $formatted = rtrim($formatted, '0');$formatted = rtrim($formatted, '.'); //Hotfix: https://github.com/aywan/php-json-canonicalization/issues/1
868 daniel-mar 41 
        } else {
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            $formatted = sprintf('%e', $number);
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            $parts = explode('e', $formatted);
1319 daniel-mar 44 
            $parts[0] = rtrim($parts[0], '0');$parts[0] = rtrim($parts[0], '.'); //Hotfix: https://github.com/aywan/php-json-canonicalization/issues/1
868 daniel-mar 45 
            $formatted = implode('e', $parts);
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        }
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        return $sign . $formatted;
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    }
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}