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Viewing changes to libclamav/c++/llvm/lib/Support/circular_raw_ostream.cpp

  • Committer: Bazaar Package Importer
  • Author(s): Kees Cook
  • Date: 2007-02-20 10:33:44 UTC
  • mto: This revision was merged to the branch mainline in revision 16.
  • Revision ID: james.westby@ubuntu.com-20070220103344-zgcu2psnx9d98fpa
Tags: upstream-0.90
Import upstream version 0.90

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libclamav/c++/llvm/lib/Support/circular_raw_ostream.cpp
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//===- circular_raw_ostream.cpp - Implement circular_raw_ostream ----------===//
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//
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//                     The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This implements support for circular buffered streams.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Support/circular_raw_ostream.h"
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#include <algorithm>
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using namespace llvm;
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void circular_raw_ostream::write_impl(const char *Ptr, size_t Size) {
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  if (BufferSize == 0) {
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    TheStream->write(Ptr, Size);
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    return;
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  }
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  // Write into the buffer, wrapping if necessary.
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  while (Size != 0) {
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    unsigned Bytes =
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      std::min(unsigned(Size), unsigned(BufferSize - (Cur - BufferArray)));
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    memcpy(Cur, Ptr, Bytes);
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    Size -= Bytes;
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    Cur += Bytes;
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    if (Cur == BufferArray + BufferSize) {
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      // Reset the output pointer to the start of the buffer.
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      Cur = BufferArray;
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      Filled = true;
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    }
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  }    
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}
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void circular_raw_ostream::flushBufferWithBanner() {
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  if (BufferSize != 0) {
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    // Write out the buffer
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    TheStream->write(Banner, std::strlen(Banner));
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    flushBuffer();
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  }
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}