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wp-content/plugins/smart-slider-3/Nextend/SmartSlider3/BackupSlider/Serialize/StringReader.php

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+<?php
+
+/**
+ * SerializeParser
+ *
+ * @copyright Jason Judge
+ *
+ * @license   http://opensource.org/licenses/MIT MIT
+ *
+ * @link      https://github.com/academe/SerializeParser/blob/master/src/StringReader.php
+ */
+
+namespace Nextend\SmartSlider3\BackupSlider\Serialize;
+
+/**
+ * Given a string, this class will read through the string using
+ * one of a number of terminating rules:
+ * - One character.
+ * - A specified number of characters.
+ * - Until a matching character is found.
+ */
+
+class StringReader
+{
+    protected $pos = 0;
+    protected $max = 0;
+    protected $string = [];
+
+    public function __construct($string)
+    {
+        // Split the string up into an array of UTF-8 characters.
+        // As an array we can read through it one character at a time.
+
+        //$this->string = preg_split('//u', $string, -1, PREG_SPLIT_NO_EMPTY);
+        //$this->max = count($this->string) - 1;
+        $this->string = $string;
+        $this->max = strlen($this->string) - 1;
+    }
+
+    /**
+     * Read the next character from the supplied string.
+     * Return null when we have run out of characters.
+     */
+    public function readOne()
+    {
+        if ($this->pos <= $this->max) {
+            $value = $this->string[$this->pos];
+            $this->pos += 1;
+        } else {
+            $value = null;
+        }
+
+        return $value;
+    }
+
+    /**
+     * Read characters until we reach the given character $char.
+     * By default, discard that final matching character and return
+     * the rest.
+     */
+    public function readUntil($char, $discard_char = true)
+    {
+        $value = '';
+
+        while(null !== ($one = $this->readOne())) {
+            if ($one !== $char || !$discard_char) {
+                $value .= $one;
+            }
+
+            if ($one === $char) {
+                break;
+            }
+        }
+
+        return $value;
+    }
+
+    /**
+     * Read $count characters, or until we have reached the end,
+     * whichever comes first.
+     * By default, remove enclosing double-quotes from the result.
+     */
+    public function read($count, $strip_quotes = true)
+    {
+        $value = '';
+
+        while($count > 0 && null != ($one = $this->readOne())) {
+            $value .= $one;
+            $count -= 1;
+        }
+
+        return $strip_quotes ? $this->stripQuotes($value) : $value;
+    }
+
+    /**
+     * Remove a single set of double-quotes from around a string.
+     *  abc => abc
+     *  "abc" => abc
+     *  ""abc"" => "abc"
+     *
+     * @param string string
+     * @returns string
+     */
+    public function stripQuotes($string)
+    {
+        // Only remove exactly one quote from the start and the end,
+        // and then only if there is one at each end.
+
+        if (strlen($string) < 2 || substr($string, 0, 1) !== '"' || substr($string, -1, 1) !== '"') {
+            // Too short, or does not start or end with a quote.
+            return $string;
+        }
+
+        // Return the middle of the string, from the second character to the second-but-last.
+        return substr($string, 1, -1);
+    }
+}