1 files changed, 30 insertions, 0 deletions
diff --git a/core/fxcrt/fx_guid.cpp b/core/fxcrt/fx_guid.cpp
new file mode 100644
index 0000000000..6f130f9d46
--- /dev/null
+++ b/core/fxcrt/fx_guid.cpp
@@ -0,0 +1,30 @@
+// Copyright 2017 PDFium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
+
+#include "core/fxcrt/fx_guid.h"
+
+#include "core/fxcrt/fx_extension.h"
+#include "core/fxcrt/fx_rand.h"
+
+void FX_GUID_CreateV4(FX_GUID* pGUID) {
+  FX_Random_GenerateMT((uint32_t*)pGUID, 4);
+  uint8_t& b = ((uint8_t*)pGUID)[6];
+  b = (b & 0x0F) | 0x40;
+}
+
+CFX_ByteString FX_GUID_ToString(const FX_GUID* pGUID, bool bSeparator) {
+  CFX_ByteString bsStr;
+  char* pBuf = bsStr.GetBuffer(40);
+  for (int32_t i = 0; i < 16; i++) {
+    uint8_t b = reinterpret_cast<const uint8_t*>(pGUID)[i];
+    FXSYS_IntToTwoHexChars(b, pBuf);
+    pBuf += 2;
+    if (bSeparator && (i == 3 || i == 5 || i == 7 || i == 9))
+      *pBuf++ = L'-';
+  }
+  bsStr.ReleaseBuffer(bSeparator ? 36 : 32);
+  return bsStr;
+}