primo commit

libraries/vendor/spomky-labs/cbor-php/src/NegativeIntegerObject.php

@@ -0,0 +1,112 @@
+<?php
+
+declare(strict_types=1);
+
+namespace CBOR;
+
+use Brick\Math\BigInteger;
+use InvalidArgumentException;
+use const STR_PAD_LEFT;
+
+final class NegativeIntegerObject extends AbstractCBORObject implements Normalizable
+{
+    private const MAJOR_TYPE = self::MAJOR_TYPE_NEGATIVE_INTEGER;
+
+    public function __construct(
+        int $additionalInformation,
+        private ?string $data
+    ) {
+        parent::__construct(self::MAJOR_TYPE, $additionalInformation);
+    }
+
+    public function __toString(): string
+    {
+        $result = parent::__toString();
+        if ($this->data !== null) {
+            $result .= $this->data;
+        }
+
+        return $result;
+    }
+
+    public static function createObjectForValue(int $additionalInformation, ?string $data): self
+    {
+        return new self($additionalInformation, $data);
+    }
+
+    public static function create(int $value): self
+    {
+        return self::createFromString((string) $value);
+    }
+
+    public static function createFromString(string $value): self
+    {
+        $integer = BigInteger::of($value);
+
+        return self::createBigInteger($integer);
+    }
+
+    public function getValue(): string
+    {
+        if ($this->data === null) {
+            return (string) (-1 - $this->additionalInformation);
+        }
+
+        $result = Utils::binToBigInteger($this->data);
+        $minusOne = BigInteger::of(-1);
+
+        return $minusOne->minus($result)
+            ->toBase(10)
+        ;
+    }
+
+    public function normalize(): string
+    {
+        return $this->getValue();
+    }
+
+    private static function createBigInteger(BigInteger $integer): self
+    {
+        if ($integer->isGreaterThanOrEqualTo(BigInteger::zero())) {
+            throw new InvalidArgumentException('The value must be a negative integer.');
+        }
+
+        $minusOne = BigInteger::of(-1);
+        $computed_value = $minusOne->minus($integer);
+
+        switch (true) {
+            case $computed_value->isLessThan(BigInteger::of(24)):
+                $ai = $computed_value->toInt();
+                $data = null;
+                break;
+            case $computed_value->isLessThan(BigInteger::fromBase('FF', 16)):
+                $ai = 24;
+                $data = self::hex2bin(str_pad($computed_value->toBase(16), 2, '0', STR_PAD_LEFT));
+                break;
+            case $computed_value->isLessThan(BigInteger::fromBase('FFFF', 16)):
+                $ai = 25;
+                $data = self::hex2bin(str_pad($computed_value->toBase(16), 4, '0', STR_PAD_LEFT));
+                break;
+            case $computed_value->isLessThan(BigInteger::fromBase('FFFFFFFF', 16)):
+                $ai = 26;
+                $data = self::hex2bin(str_pad($computed_value->toBase(16), 8, '0', STR_PAD_LEFT));
+                break;
+            default:
+                throw new InvalidArgumentException(
+                    'Out of range. Please use NegativeBigIntegerTag tag with ByteStringObject object instead.'
+                );
+        }
+
+        return new self($ai, $data);
+    }
+
+    private static function hex2bin(string $data): string
+    {
+        $result = hex2bin($data);
+        if ($result === false) {
+            throw new InvalidArgumentException('Unable to convert the data');
+        }
+
+        return $result;
+    }
+}