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[yaffs-website] / vendor / easyrdf / easyrdf / lib / EasyRdf / Literal / Decimal.php

diff --git a/vendor/easyrdf/easyrdf/lib/EasyRdf/Literal/Decimal.php b/vendor/easyrdf/easyrdf/lib/EasyRdf/Literal/Decimal.php
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+<?php
+
+/**
+ * EasyRdf
+ *
+ * LICENSE
+ *
+ * Copyright (c) 2009-2013 Nicholas J Humfrey.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author 'Nicholas J Humfrey" may be used to endorse or
+ *    promote products derived from this software without specific prior
+ *    written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ * @package    EasyRdf
+ * @copyright  Copyright (c) 2009-2013 Nicholas J Humfrey
+ * @license    http://www.opensource.org/licenses/bsd-license.php
+ */
+
+/**
+ * Class that represents an RDF Literal of datatype xsd:decimal
+ *
+ * @package    EasyRdf
+ * @link       http://www.w3.org/TR/xmlschema-2/#decimal
+ * @copyright  Copyright (c) 2009-2013 Nicholas J Humfrey
+ * @license    http://www.opensource.org/licenses/bsd-license.php
+ */
+class EasyRdf_Literal_Decimal extends EasyRdf_Literal
+{
+    /**
+     * written according to http://www.w3.org/TR/xmlschema-2/#decimal
+     */
+    const DECIMAL_REGEX = '^([+\-]?)(((\d+)?\.(\d+))|((\d+)\.?))$';
+
+    /** Constructor for creating a new decimal literal
+     *
+     * @param  double|int|string $value    The value of the literal
+     * @param  string            $lang     Should be null (literals with a datatype can't have a language)
+     * @param  string            $datatype Optional datatype (default 'xsd:decimal')
+     *
+     * @throws UnexpectedValueException
+     * @return EasyRdf_Literal_Decimal
+     */
+    public function __construct($value, $lang = null, $datatype = null)
+    {
+        if (is_string($value)) {
+            self::validate($value);
+        } elseif (is_double($value) or is_int($value)) {
+            $locale_data = localeconv();
+            $value = str_replace($locale_data['decimal_point'], '.', strval($value));
+        } else {
+            throw new UnexpectedValueException('EasyRdf_Literal_Decimal expects int/float/string as value');
+        }
+
+        $value = self::canonicalise($value);
+
+        parent::__construct($value, null, $datatype);
+    }
+
+    /** Return the value of the literal cast to a PHP string
+     *
+     * @return string
+     */
+    public function getValue()
+    {
+        return strval($this->value);
+    }
+
+    /**
+     * @param string $value
+     *
+     * @throws UnexpectedValueException
+     */
+    public static function validate($value)
+    {
+        if (!mb_ereg_match(self::DECIMAL_REGEX, $value)) {
+            throw new UnexpectedValueException("'{$value}' doesn't look like a valid decimal");
+        }
+    }
+
+    /**
+     * Converts valid xsd:decimal literal to Canonical representation
+     * see http://www.w3.org/TR/xmlschema-2/#decimal
+     *
+     * @param string $value Valid xsd:decimal literal
+     *
+     * @return string
+     */
+    public static function canonicalise($value)
+    {
+        $pieces = array();
+        mb_ereg(self::DECIMAL_REGEX, $value, $pieces);
+
+        $sign       = $pieces[1] === '-' ? '-' : '';  // '+' is not allowed
+        $integer    = ltrim(($pieces[4] !== false) ? $pieces[4] : $pieces[7], '0');
+        $fractional = rtrim($pieces[5], '0');
+
+        if (empty($integer)) {
+            $integer = '0';
+        }
+
+        if (empty($fractional)) {
+            $fractional = '0';
+        }
+
+        return "{$sign}{$integer}.{$fractional}";
+    }
+}