1 files changed, 82 insertions, 0 deletions
diff --git a/other-licenses/nsis/Contrib/CityHash/CityHash.cpp b/other-licenses/nsis/Contrib/CityHash/CityHash.cpp
new file mode 100644
index 0000000000..9998fb627d
--- /dev/null
+++ b/other-licenses/nsis/Contrib/CityHash/CityHash.cpp
@@ -0,0 +1,82 @@
+/* -*- 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 "CityHash.h"
+#include "cityhash/city.h"
+#include <tchar.h>
+
+#define MAX_STRLEN 1024
+
+typedef struct _stack_t {
+  struct _stack_t *next;
+  TCHAR text[MAX_STRLEN];
+} stack_t;
+
+stack_t **g_stacktop;
+char *g_variables;
+
+BOOL APIENTRY DllMain(HMODULE hModule,
+                      DWORD  ul_reason_for_call,
+                      LPVOID lpReserved)
+{
+  switch (ul_reason_for_call)
+  {
+  case DLL_PROCESS_ATTACH:
+  case DLL_THREAD_ATTACH:
+  case DLL_THREAD_DETACH:
+  case DLL_PROCESS_DETACH:
+    break;
+  }
+  return TRUE;
+}
+
+bool popString(TCHAR *result)
+{
+  stack_t *th;
+  if (!g_stacktop || !*g_stacktop) return false;
+  th = (*g_stacktop);
+  lstrcpyn(result, th->text, MAX_STRLEN);
+  *g_stacktop = th->next;
+  GlobalFree((HGLOBAL)th);
+  return true;
+}
+
+void pushString(const TCHAR *str)
+{
+  stack_t *th;
+  int strLen = wcslen(str)+1;
+  if (!g_stacktop) return;
+  th = (stack_t*)GlobalAlloc(GPTR, sizeof(stack_t) + (MAX_STRLEN*sizeof(TCHAR)));
+  lstrcpyn(th->text, str, strLen);
+  th->next = *g_stacktop;
+  *g_stacktop = th;
+}
+
+extern "C"
+{
+
+void GetCityHash64(HWND hwndParent, int string_size, char *variables, stack_t **stacktop)
+{
+  TCHAR hashString[MAX_STRLEN];
+  TCHAR hexResult[18] = { _T('\0') };
+
+  g_stacktop = stacktop;
+  g_variables = variables;
+
+  memset(hashString, 0, sizeof(hashString));
+  memset(hexResult, 0, sizeof(hexResult));
+
+  if (!popString(hashString)) {
+    pushString(L"error");
+    return;
+  }
+  uint64 result = CityHash64((const char*)&hashString[0], wcslen(hashString)*sizeof(TCHAR));
+  // If the hash happens to work out to less than 16 hash digits it will just
+  // use less of the buffer.
+  swprintf(hexResult, L"%I64X", result);
+  pushString(hexResult);
+}
+
+}