Repo created

TMessagesProj/jni/voip/webrtc/rtc_base/crypt_string.h

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+/*
+ *  Copyright 2004 The WebRTC Project Authors. All rights reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#ifndef RTC_BASE_CRYPT_STRING_H_
+#define RTC_BASE_CRYPT_STRING_H_
+
+#include <string.h>
+
+#include <memory>
+#include <string>
+#include <vector>
+
+namespace rtc {
+
+class CryptStringImpl {
+ public:
+  virtual ~CryptStringImpl() {}
+  virtual size_t GetLength() const = 0;
+  virtual void CopyTo(char* dest, bool nullterminate) const = 0;
+  virtual std::string UrlEncode() const = 0;
+  virtual CryptStringImpl* Copy() const = 0;
+  virtual void CopyRawTo(std::vector<unsigned char>* dest) const = 0;
+};
+
+class EmptyCryptStringImpl : public CryptStringImpl {
+ public:
+  ~EmptyCryptStringImpl() override {}
+  size_t GetLength() const override;
+  void CopyTo(char* dest, bool nullterminate) const override;
+  std::string UrlEncode() const override;
+  CryptStringImpl* Copy() const override;
+  void CopyRawTo(std::vector<unsigned char>* dest) const override;
+};
+
+class CryptString {
+ public:
+  CryptString();
+  size_t GetLength() const { return impl_->GetLength(); }
+  void CopyTo(char* dest, bool nullterminate) const {
+    impl_->CopyTo(dest, nullterminate);
+  }
+  CryptString(const CryptString& other);
+  explicit CryptString(const CryptStringImpl& impl);
+  ~CryptString();
+  CryptString& operator=(const CryptString& other) {
+    if (this != &other) {
+      impl_.reset(other.impl_->Copy());
+    }
+    return *this;
+  }
+  void Clear() { impl_.reset(new EmptyCryptStringImpl()); }
+  std::string UrlEncode() const { return impl_->UrlEncode(); }
+  void CopyRawTo(std::vector<unsigned char>* dest) const {
+    return impl_->CopyRawTo(dest);
+  }
+
+ private:
+  std::unique_ptr<const CryptStringImpl> impl_;
+};
+
+}  // namespace rtc
+
+#endif  // RTC_BASE_CRYPT_STRING_H_