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<?php |
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namespace WebStream\IO; |
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/** |
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* StringInputStream |
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* @author Ryuichi TANAKA. |
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* @since 2016/02/07 |
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* @version 0.7 |
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*/ |
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class StringInputStream extends InputStream |
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{ |
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/** |
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* @var int 文字列長 |
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*/ |
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private $length; |
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/** |
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* construct |
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* @param string $str 文字列 |
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*/ |
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public function __construct(string $str) |
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{ |
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$this->cursorPosition = 0; |
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$this->markedPosition = 0; |
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// 文字列をストリームとして扱う |
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$this->stream = $str; |
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$this->length = count($str); |
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} |
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/** |
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* 入力ストリームを閉じる |
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*/ |
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public function close() |
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{ |
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$this->stream = null; |
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} |
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/** |
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* 入力ストリームからデータを読み込む |
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* 引数に数値を指定した場合、指定数値バイトだけ読み込む |
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* @param int length 読み込みバイト数 |
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* @return string 読み込みデータ |
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*/ |
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public function read($length = null) |
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{ |
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if ($this->eof()) { |
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return -1; |
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} |
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$out = ""; |
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if ($length === null) { |
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$endPosition = $this->length > $this->cursorPosition ? |
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$this->cursorPosition : $this->length; |
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$out = substr($this->stream, $endPosition); |
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} else { |
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// $lengthがファイル終端を越えないようにする |
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if ($this->length > $this->cursorPosition + $length) { |
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$length = $this->length - $this->cursorPosition; |
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} |
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$out = substr($this->stream, $this->cursorPosition, $length); |
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} |
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return $out; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function skip(int $pos) |
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{ |
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// 文字列長より後方を指定した場合、-1を返す |
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if ($this->cursorPosition + $pos > $this->length - 1) { |
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return -1; |
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} |
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$start = $this->cursorPosition; |
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$this->cursorPosition = $pos; |
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$skipNum = 0; |
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View Code Duplication |
if ($start > $this->cursorPosition) { |
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// 前方へ移動 |
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$skipNum = $start - $this->cursorPosition; |
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} else { |
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// 後方へ移動 |
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$skipNum = $this->cursorPosition - $start; |
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} |
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return $skipNum; |
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} |
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/** |
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* 入力ストリームの現在位置にmarkを設定する |
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*/ |
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public function mark() |
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{ |
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$this->markedPosition = $this->cursorPosition; |
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} |
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/** |
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* 最後にmarkされた位置に再配置する |
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*/ |
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public function reset() |
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{ |
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$this->markedPosition = 0; |
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} |
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public function eof() |
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{ |
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return $this->cursorPosition >= $this->length - 1; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function isMarkSupported() |
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{ |
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return true; |
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} |
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} |
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webstream-framework /
WebStream
Loading history...
Our type inference engine has found an assignment to a property that is incompatible with the declared type of that property.
Either this assignment is in error or the assigned type should be added to the documentation/type hint for that property..