1 files changed, 39 insertions, 0 deletions
diff --git a/node_modules/locutus/php/var/is_unicode.js b/node_modules/locutus/php/var/is_unicode.js
new file mode 100644
index 0000000..52b0a94
--- /dev/null
+++ b/node_modules/locutus/php/var/is_unicode.js
@@ -0,0 +1,39 @@
+'use strict';
+
+module.exports = function is_unicode(vr) {
+  // eslint-disable-line camelcase
+  //  discuss at: http://locutus.io/php/is_unicode/
+  // original by: Brett Zamir (http://brett-zamir.me)
+  //      note 1: Almost all strings in JavaScript should be Unicode
+  //   example 1: is_unicode('We the peoples of the United Nations...!')
+  //   returns 1: true
+
+  if (typeof vr !== 'string') {
+    return false;
+  }
+
+  // If surrogates occur outside of high-low pairs, then this is not Unicode
+  var arr = [];
+  var highSurrogate = '[\uD800-\uDBFF]';
+  var lowSurrogate = '[\uDC00-\uDFFF]';
+  var highSurrogateBeforeAny = new RegExp(highSurrogate + '([\\s\\S])', 'g');
+  var lowSurrogateAfterAny = new RegExp('([\\s\\S])' + lowSurrogate, 'g');
+  var singleLowSurrogate = new RegExp('^' + lowSurrogate + '$');
+  var singleHighSurrogate = new RegExp('^' + highSurrogate + '$');
+
+  while ((arr = highSurrogateBeforeAny.exec(vr)) !== null) {
+    if (!arr[1] || !arr[1].match(singleLowSurrogate)) {
+      // If high not followed by low surrogate
+      return false;
+    }
+  }
+  while ((arr = lowSurrogateAfterAny.exec(vr)) !== null) {
+    if (!arr[1] || !arr[1].match(singleHighSurrogate)) {
+      // If low not preceded by high surrogate
+      return false;
+    }
+  }
+
+  return true;
+};
+//# sourceMappingURL=is_unicode.js.map
+\ No newline at end of file