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node_modules/range-parser/index.js

@@ -0,0 +1,49 @@
+
+/**
+ * Parse "Range" header `str` relative to the given file `size`.
+ *
+ * @param {Number} size
+ * @param {String} str
+ * @return {Array}
+ * @api public
+ */
+
+module.exports = function(size, str){
+  var valid = true;
+  var i = str.indexOf('=');
+
+  if (-1 == i) return -2;
+
+  var arr = str.slice(i + 1).split(',').map(function(range){
+    var range = range.split('-')
+      , start = parseInt(range[0], 10)
+      , end = parseInt(range[1], 10);
+
+    // -nnn
+    if (isNaN(start)) {
+      start = size - end;
+      end = size - 1;
+    // nnn-
+    } else if (isNaN(end)) {
+      end = size - 1;
+    }
+
+    // limit last-byte-pos to current length
+    if (end > size - 1) end = size - 1;
+
+    // invalid
+    if (isNaN(start)
+      || isNaN(end)
+      || start > end
+      || start < 0) valid = false;
+
+    return {
+      start: start,
+      end: end
+    };
+  });
+
+  arr.type = str.slice(0, i);
+
+  return valid ? arr : -1;
+};