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//===- circular_raw_ostream.cpp - Implement circular_raw_ostream ----------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This implements support for circular buffered streams.
//
//===----------------------------------------------------------------------===//
#include "llvm/Support/circular_raw_ostream.h"
#include <algorithm>
using namespace llvm;
void circular_raw_ostream::write_impl(const char *Ptr, size_t Size) {
if (BufferSize == 0) {
TheStream->write(Ptr, Size);
return;
}
// Write into the buffer, wrapping if necessary.
while (Size != 0) {
unsigned Bytes =
std::min(unsigned(Size), unsigned(BufferSize - (Cur - BufferArray)));
memcpy(Cur, Ptr, Bytes);
Size -= Bytes;
Cur += Bytes;
if (Cur == BufferArray + BufferSize) {
// Reset the output pointer to the start of the buffer.
Cur = BufferArray;
Filled = true;
}
}
}
void circular_raw_ostream::flushBufferWithBanner() {
if (BufferSize != 0) {
// Write out the buffer
TheStream->write(Banner, std::strlen(Banner));
flushBuffer();
}
}
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