Index: sdch/open_vcdiff/depot/opensource/open-vcdiff/src/google/output_string.h |
=================================================================== |
--- sdch/open_vcdiff/depot/opensource/open-vcdiff/src/google/output_string.h (revision 2678) |
+++ sdch/open_vcdiff/depot/opensource/open-vcdiff/src/google/output_string.h (working copy) |
@@ -1,108 +0,0 @@ |
-// Copyright 2008 Google Inc. |
-// Author: Lincoln Smith |
-// |
-// Licensed under the Apache License, Version 2.0 (the "License"); |
-// you may not use this file except in compliance with the License. |
-// You may obtain a copy of the License at |
-// |
-// http://www.apache.org/licenses/LICENSE-2.0 |
-// |
-// Unless required by applicable law or agreed to in writing, software |
-// distributed under the License is distributed on an "AS IS" BASIS, |
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
-// See the License for the specific language governing permissions and |
-// limitations under the License. |
- |
-#ifndef OPEN_VCDIFF_OUTPUT_STRING_H_ |
-#define OPEN_VCDIFF_OUTPUT_STRING_H_ |
- |
-#include <cstddef> // size_t |
- |
-namespace open_vcdiff { |
- |
-// This interface allows clients of VCDiff[Streaming]Encoder and |
-// VCDiff[Streaming]Decoder to use different string types to receive the output |
-// of those interfaces. |
-// |
-// Only the following operations can be performed on an output string, and their |
-// semantics must be identical to the std::string methods of the same names: |
-// append() |
-// clear() |
-// push_back() |
-// size() |
-// |
-// The versions of these methods that take a std::string argument are not |
-// supported by OutputStringInterface. |
-// |
-// There is one additional operation that can be performed on an output string: |
-// ReserveAdditionalBytes(). This asks the underlying output type to reserve |
-// enough capacity for the number of additional bytes requested in addition to |
-// existing content. The decoder knows the total expected output size in |
-// advance, so one large ReserveAdditionalBytes() operation precedes many small |
-// append() operations. For output types that gain no advantage from knowing in |
-// advance how many bytes will be appended, ReserveAdditionalBytes() can be |
-// defined to do nothing. |
-class OutputStringInterface { |
- public: |
- virtual ~OutputStringInterface() { } |
- |
- virtual OutputStringInterface& append(const char* s, size_t n) = 0; |
- |
- virtual void clear() = 0; |
- |
- virtual void push_back(char c) = 0; |
- |
- virtual void ReserveAdditionalBytes(size_t res_arg) = 0; |
- |
- virtual size_t size() const = 0; |
-}; |
- |
-// This template can be used to wrap any class that supports the operations |
-// needed by OutputStringInterface, including std::string. A class that has |
-// different names or syntax for these operations will need specialized |
-// definitions of OutputString methods -- see output_string_types.h for some |
-// examples of how to do this. |
-template<class StringClass> |
-class OutputString : public OutputStringInterface { |
- public: |
- explicit OutputString(StringClass* impl) : impl_(impl) { } |
- |
- virtual ~OutputString() { } |
- |
- virtual OutputString& append(const char* s, size_t n) { |
- impl_->append(s, n); |
- return *this; |
- } |
- |
- virtual void clear() { |
- impl_->clear(); |
- } |
- |
- virtual void push_back(char c) { |
- impl_->push_back(c); |
- } |
- |
- virtual void ReserveAdditionalBytes(size_t res_arg) { |
- impl_->reserve(impl_->size() + res_arg); |
- } |
- |
- virtual size_t size() const { |
- return impl_->size(); |
- } |
- |
- private: |
- StringClass* impl_; |
- |
- // Making these private avoids implicit copy constructor & assignment operator |
- OutputString(const OutputString&); |
- void operator=(const OutputString&); |
-}; |
- |
-// Don't allow the OutputString template to be based upon a pointer to |
-// OutputStringInterface. Enforce this restriction by defining this class to |
-// lack any functions expected of an OutputString. |
-template<> class OutputString<OutputStringInterface> { }; |
- |
-} // namespace open_vcdiff |
- |
-#endif // OPEN_VCDIFF_OUTPUT_STRING_H_ |