Initial commit

1 files changed, 98 insertions, 0 deletions

diff --git a/node_modules/mdurl/encode.js b/node_modules/mdurl/encode.js
new file mode 100644
index 0000000..6dff4f9
--- /dev/null
+++ b/node_modules/mdurl/encode.js
@@ -0,0 +1,98 @@
+
+'use strict';
+
+
+var encodeCache = {};
+
+
+// Create a lookup array where anything but characters in `chars` string
+// and alphanumeric chars is percent-encoded.
+//
+function getEncodeCache(exclude) {
+  var i, ch, cache = encodeCache[exclude];
+  if (cache) { return cache; }
+
+  cache = encodeCache[exclude] = [];
+
+  for (i = 0; i < 128; i++) {
+    ch = String.fromCharCode(i);
+
+    if (/^[0-9a-z]$/i.test(ch)) {
+      // always allow unencoded alphanumeric characters
+      cache.push(ch);
+    } else {
+      cache.push('%' + ('0' + i.toString(16).toUpperCase()).slice(-2));
+    }
+  }
+
+  for (i = 0; i < exclude.length; i++) {
+    cache[exclude.charCodeAt(i)] = exclude[i];
+  }
+
+  return cache;
+}
+
+
+// Encode unsafe characters with percent-encoding, skipping already
+// encoded sequences.
+//
+//  - string       - string to encode
+//  - exclude      - list of characters to ignore (in addition to a-zA-Z0-9)
+//  - keepEscaped  - don't encode '%' in a correct escape sequence (default: true)
+//
+function encode(string, exclude, keepEscaped) {
+  var i, l, code, nextCode, cache,
+      result = '';
+
+  if (typeof exclude !== 'string') {
+    // encode(string, keepEscaped)
+    keepEscaped  = exclude;
+    exclude = encode.defaultChars;
+  }
+
+  if (typeof keepEscaped === 'undefined') {
+    keepEscaped = true;
+  }
+
+  cache = getEncodeCache(exclude);
+
+  for (i = 0, l = string.length; i < l; i++) {
+    code = string.charCodeAt(i);
+
+    if (keepEscaped && code === 0x25 /* % */ && i + 2 < l) {
+      if (/^[0-9a-f]{2}$/i.test(string.slice(i + 1, i + 3))) {
+        result += string.slice(i, i + 3);
+        i += 2;
+        continue;
+      }
+    }
+
+    if (code < 128) {
+      result += cache[code];
+      continue;
+    }
+
+    if (code >= 0xD800 && code <= 0xDFFF) {
+      if (code >= 0xD800 && code <= 0xDBFF && i + 1 < l) {
+        nextCode = string.charCodeAt(i + 1);
+        if (nextCode >= 0xDC00 && nextCode <= 0xDFFF) {
+          result += encodeURIComponent(string[i] + string[i + 1]);
+          i++;
+          continue;
+        }
+      }
+      result += '%EF%BF%BD';
+      continue;
+    }
+
+    result += encodeURIComponent(string[i]);
+  }
+
+  return result;
+}
+
+encode.defaultChars   = ";/?:@&=+$,-_.!~*'()#";
+encode.componentChars = "-_.!~*'()";
+
+
+module.exports = encode;