1 //===- circulat_raw_ostream.cpp - Implement the circular_raw_ostream class -===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This implements support for circular buffered streams.
12 //===----------------------------------------------------------------------===//
14 #include "llvm/Support/circular_raw_ostream.h"
20 void circular_raw_ostream::write_impl(const char *Ptr, size_t Size) {
21 if (BufferSize == 0) {
22 TheStream->write(Ptr, Size);
26 // Write into the buffer, wrapping if necessary.
28 unsigned Bytes = std::min(Size, BufferSize - (Cur - BufferArray));
29 memcpy(Cur, Ptr, Bytes);
32 if (Cur == BufferArray + BufferSize) {
33 // Reset the output pointer to the start of the buffer.
40 void circular_raw_ostream::flushBufferWithBanner(void) {
41 if (BufferSize != 0) {
42 // Write out the buffer
43 int num = std::strlen(Banner);
44 TheStream->write(Banner, num);