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//===---- 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_
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