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Diffstat (limited to 'runtime/vector_output_stream.h')
-rw-r--r-- | runtime/vector_output_stream.h | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/runtime/vector_output_stream.h b/runtime/vector_output_stream.h new file mode 100644 index 0000000000..3546c8d577 --- /dev/null +++ b/runtime/vector_output_stream.h @@ -0,0 +1,65 @@ +/* + * Copyright (C) 2013 The Android Open Source Project + * + * 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 ART_SRC_VECTOR_OUTPUT_STREAM_H_ +#define ART_SRC_VECTOR_OUTPUT_STREAM_H_ + +#include "output_stream.h" + +#include <string> +#include <string.h> +#include <vector> + +namespace art { + +class VectorOutputStream : public OutputStream { + public: + VectorOutputStream(const std::string& location, std::vector<uint8_t>& vector); + + virtual ~VectorOutputStream() {} + + bool WriteFully(const void* buffer, int64_t byte_count) { + if (static_cast<size_t>(offset_) == vector_.size()) { + const uint8_t* start = reinterpret_cast<const uint8_t*>(buffer); + vector_.insert(vector_.end(), &start[0], &start[byte_count]); + offset_ += byte_count; + } else { + off_t new_offset = offset_ + byte_count; + EnsureCapacity(new_offset); + memcpy(&vector_[offset_], buffer, byte_count); + offset_ = new_offset; + } + return true; + } + + off_t Seek(off_t offset, Whence whence); + + private: + void EnsureCapacity(off_t new_offset) { + if (new_offset > static_cast<off_t>(vector_.size())) { + vector_.resize(new_offset); + } + } + + off_t offset_; + std::vector<uint8_t>& vector_; + + DISALLOW_COPY_AND_ASSIGN(VectorOutputStream); +}; + +} // namespace art + +#endif // ART_SRC_VECTOR_OUTPUT_STREAM_H_ |