1 files changed, 42 insertions, 0 deletions
diff --git a/build/clang-plugin/mozsearch-plugin/StringOperations.cpp b/build/clang-plugin/mozsearch-plugin/StringOperations.cpp
new file mode 100644
index 0000000000..a2e60e42c6
--- /dev/null
+++ b/build/clang-plugin/mozsearch-plugin/StringOperations.cpp
@@ -0,0 +1,42 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* 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 "StringOperations.h"
+
+static unsigned long djbHash(const char *Str) {
+  unsigned long Hash = 5381;
+
+  for (const char *P = Str; *P; P++) {
+    // Hash * 33 + c
+    Hash = ((Hash << 5) + Hash) + *P;
+  }
+
+  return Hash;
+}
+
+// This doesn't actually return a hex string of |hash|, but it
+// does... something. It doesn't really matter what.
+static void hashToString(unsigned long Hash, char *Buffer) {
+  const char Table[] = {"0123456789abcdef"};
+  char *P = Buffer;
+  while (Hash) {
+    *P = Table[Hash & 0xf];
+    Hash >>= 4;
+    P++;
+  }
+
+  *P = 0;
+}
+
+std::string hash(const std::string &Str) {
+  static char HashStr[41];
+  unsigned long H = djbHash(Str.c_str());
+  hashToString(H, HashStr);
+  return std::string(HashStr);
+}
+
+std::string toString(int N) {
+  return stringFormat("%d", N);
+}