43 lines
1 KiB
PHP
43 lines
1 KiB
PHP
<?php
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namespace FWIF;
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class FWIFDecodeStream {
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private string $body;
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private int $length;
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private int $position = 0;
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public function __construct(string $body) {
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$this->body = $body;
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$this->length = strlen($body);
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}
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public function getLength(): int {
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return $this->length;
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}
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public function getPosition(): int {
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return $this->position;
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}
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public function stepBack(): void {
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$this->position = max(0, $this->position - 1);
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}
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public function readByte(): int {
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if($this->position + 1 >= $this->length)
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return FWIF::TRAILER;
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return ord($this->body[$this->position++]);
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}
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public function readChar(): string {
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return chr($this->readByte());
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}
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public function readString(int $length): string {
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// Bounds checks? What are those?
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$string = substr($this->body, $this->position, $length);
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$this->position += $length;
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return $string;
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}
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}
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