| //===---- llvm/Support/DataStream.h - Lazy bitcode streaming ----*- C++ -*-===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This header defines DataStreamer, which fetches bytes of data from |
| // a stream source. It provides support for streaming (lazy reading) of |
| // data, e.g. bitcode |
| // |
| //===----------------------------------------------------------------------===// |
| |
| |
| #ifndef LLVM_SUPPORT_DATASTREAM_H |
| #define LLVM_SUPPORT_DATASTREAM_H |
| |
| #include <memory> |
| #include <string> |
| |
| namespace llvm { |
| |
| class DataStreamer { |
| public: |
| /// Fetch bytes [start-end) from the stream, and write them to the |
| /// buffer pointed to by buf. Returns the number of bytes actually written. |
| virtual size_t GetBytes(unsigned char *buf, size_t len) = 0; |
| |
| virtual ~DataStreamer(); |
| }; |
| |
| std::unique_ptr<DataStreamer> getDataFileStreamer(const std::string &Filename, |
| std::string *Err); |
| } |
| |
| #endif // LLVM_SUPPORT_DATASTREAM_H_ |