1 files changed, 69 insertions, 0 deletions
diff --git a/toolkit/components/aboutthirdparty/AboutThirdPartyUtils.cpp b/toolkit/components/aboutthirdparty/AboutThirdPartyUtils.cpp
new file mode 100644
index 0000000000..050975c9da
--- /dev/null
+++ b/toolkit/components/aboutthirdparty/AboutThirdPartyUtils.cpp
@@ -0,0 +1,69 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "AboutThirdPartyUtils.h"
+
+#include "nsUnicharUtils.h"
+
+namespace mozilla {
+
+int32_t CompareIgnoreCase(const nsAString& aStr1, const nsAString& aStr2) {
+  uint32_t len1 = aStr1.Length();
+  uint32_t len2 = aStr2.Length();
+  uint32_t lenMin = XPCOM_MIN(len1, len2);
+
+  int32_t result = nsCaseInsensitiveStringComparator(
+      aStr1.BeginReading(), aStr2.BeginReading(), lenMin, lenMin);
+  return result ? result : len1 - len2;
+}
+
+bool MsiPackGuid(const nsAString& aGuid, nsAString& aPacked) {
+  if (aGuid.Length() != 38 || aGuid.First() != u'{' || aGuid.Last() != u'}') {
+    return false;
+  }
+
+  constexpr int kPackedLength = 32;
+  const uint8_t kIndexMapping[kPackedLength] = {
+      // clang-format off
+      0x08, 0x07, 0x06, 0x05, 0x04, 0x03, 0x02, 0x01,
+      0x0d, 0x0c, 0x0b, 0x0a, 0x12, 0x11, 0x10, 0x0f,
+      0x15, 0x14, 0x17, 0x16, 0x1a, 0x19, 0x1c, 0x1b,
+      0x1e, 0x1d, 0x20, 0x1f, 0x22, 0x21, 0x24, 0x23,
+      // clang-format on
+  };
+
+  int index = 0;
+  aPacked.SetLength(kPackedLength);
+  for (auto iter = aPacked.BeginWriting(), strEnd = aPacked.EndWriting();
+       iter != strEnd; ++iter, ++index) {
+    *iter = aGuid[kIndexMapping[index]];
+  }
+
+  return true;
+}
+
+bool CorrectMsiComponentPath(nsAString& aPath) {
+  if (aPath.Length() < 3 || !aPath.BeginReading()[0]) {
+    return false;
+  }
+
+  char16_t* strBegin = aPath.BeginWriting();
+
+  if (strBegin[1] == u'?') {
+    strBegin[1] = strBegin[0] == u'\\' ? u'\\' : u':';
+  }
+
+  if (strBegin[1] != u':' || strBegin[2] != u'\\') {
+    return false;
+  }
+
+  if (aPath.Length() > 3 && aPath.BeginReading()[3] == u'?') {
+    aPath.ReplaceLiteral(3, 1, u"");
+  }
+  return true;
+}
+
+}  // namespace mozilla