From 9af485a584e47fd503ed5c62b9f6482574715f1e Mon Sep 17 00:00:00 2001
From: Florian Dold <florian.dold@gmail.com>
Date: Mon, 10 Oct 2016 03:50:11 +0200
Subject: Squashed 'thirdparty/systemjs/' content from commit 5ed69b6

git-subtree-dir: thirdparty/systemjs
git-subtree-split: 5ed69b6344e8fc1cd43bf758350b2236f57e1499
---
 lib/paths.js | 42 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 42 insertions(+)
 create mode 100644 lib/paths.js

(limited to 'lib/paths.js')

diff --git a/lib/paths.js b/lib/paths.js
new file mode 100644
index 000000000..5208fe457
--- /dev/null
+++ b/lib/paths.js
@@ -0,0 +1,42 @@
+function applyPaths(paths, name) {
+  // most specific (most number of slashes in path) match wins
+  var pathMatch = '', wildcard, maxWildcardPrefixLen = 0;
+
+  // check to see if we have a paths entry
+  for (var p in paths) {
+    if (paths.hasOwnProperty && !paths.hasOwnProperty(p))
+      continue;
+
+    // exact path match
+    if (p.indexOf('*') === -1) {
+      if (name == p)
+        return paths[p];
+      
+      // support trailing / in paths rules
+      else if (name.substr(0, p.length - 1) == p.substr(0, p.length - 1) && (name.length < p.length || name[p.length - 1] == p[p.length - 1]) && (paths[p][paths[p].length - 1] == '/' || paths[p] == '')) {
+        return paths[p].substr(0, paths[p].length - 1) + (name.length > p.length ? (paths[p] && '/' || '') + name.substr(p.length) : '');
+      }
+    }
+    // wildcard path match
+    else {
+      var pathParts = p.split('*');
+      if (pathParts.length > 2)
+        throw new TypeError('Only one wildcard in a path is permitted');
+
+      var wildcardPrefixLen = pathParts[0].length;
+      if (wildcardPrefixLen >= maxWildcardPrefixLen &&
+          name.substr(0, pathParts[0].length) == pathParts[0] &&
+          name.substr(name.length - pathParts[1].length) == pathParts[1]) {
+            maxWildcardPrefixLen = wildcardPrefixLen;
+            pathMatch = p;
+            wildcard = name.substr(pathParts[0].length, name.length - pathParts[1].length - pathParts[0].length);
+          }
+    }
+  }
+
+  var outPath = paths[pathMatch];
+  if (typeof wildcard == 'string')
+    outPath = outPath.replace('*', wildcard);
+
+  return outPath;
+}
\ No newline at end of file
-- 
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