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<?php |
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namespace Transphporm\Parser\Tokenizer; |
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use Transphporm\Parser\Tokenizer; |
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class TokenizedString { |
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private $str; |
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private $pos = -1; |
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private $lineNo = 1; |
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private $chars = [ |
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'"' => Tokenizer::STRING, |
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'\'' => Tokenizer::STRING, |
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'(' => Tokenizer::OPEN_BRACKET, |
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')' => Tokenizer::CLOSE_BRACKET, |
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'[' => Tokenizer::OPEN_SQUARE_BRACKET, |
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']' => Tokenizer::CLOSE_SQUARE_BRACKET, |
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'+' => Tokenizer::CONCAT, |
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',' => Tokenizer::ARG, |
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'.' => Tokenizer::DOT, |
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'!' => Tokenizer::NOT, |
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'=' => Tokenizer::EQUALS, |
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'{' => Tokenizer::OPEN_BRACE, |
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'}' => Tokenizer::CLOSE_BRACE, |
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':' => Tokenizer::COLON, |
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';' => Tokenizer::SEMI_COLON, |
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'#' => Tokenizer::NUM_SIGN, |
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'>' => Tokenizer::GREATER_THAN, |
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'@' => Tokenizer::AT_SIGN, |
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'-' => Tokenizer::SUBTRACT, |
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'*' => Tokenizer::MULTIPLY, |
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'/' => Tokenizer::DIVIDE, |
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' ' => Tokenizer::WHITESPACE, |
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"\n" => Tokenizer::NEW_LINE, |
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"\r" => Tokenizer::WHITESPACE, |
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"\t" => Tokenizer::WHITESPACE |
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]; |
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public function __construct($str) { |
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$this->str = $str; |
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} |
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public function move($n) { |
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if ($n === false) $this->pos = strlen($this->str)-1; |
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else $this->pos += $n; |
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} |
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public function next() { |
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$this->pos++; |
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return $this->pos < strlen($this->str); |
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} |
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public function reset() { |
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$this->lineNo = 1; |
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$this->pos = -1; |
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} |
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public function read($offset = 0) { |
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return $this->str[$this->pos + $offset]; |
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} |
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public function identifyChar($offset = 0) { |
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$chr = $this->str[$this->pos + $offset]; |
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if (!empty($this->chars[$chr])) return $this->chars[$chr]; |
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else return Tokenizer::NAME; |
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} |
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public function has($offset = 0) { |
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return isset($this->str[$this->pos + $offset]); |
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} |
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public function pos($str) { |
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$pos = strpos($this->str, $str, $this->pos); |
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return $pos ? $pos-$this->pos : false; |
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} |
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public function newLine() { |
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return $this->lineNo++; |
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} |
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public function lineNo() { |
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return $this->lineNo; |
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} |
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public function extractString($offset = 0) { |
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$pos = $this->pos + $offset; |
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$char = $this->str[$pos]; |
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$end = strpos($this->str, $char, $pos+1); |
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while ($end !== false && $this->str[$end-1] == '\\') $end = strpos($this->str, $char, $end+1); |
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return substr($this->str, $pos+1, $end-$pos-1); |
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} |
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public function extractBrackets($startBracket = '(', $closeBracket = ')', $offset = 0) { |
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$open = $this->pos+$offset; |
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$close = strpos($this->str, $closeBracket, $open); |
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$cPos = $open+1; |
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while (($cPos = strpos($this->str, $startBracket, $cPos+1)) !== false && $cPos < $close) $close = strpos($this->str, $closeBracket, $close+1); |
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return substr($this->str, $open+1, $close-$open-1); |
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} |
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} |
Level-2 /
Transphporm
