mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-12-30 15:45:26 +00:00
f1f78a15e1
and outputs it when explicitly flushed. The intent is to use it in situations such as debug output logging where a signal handler can take care of flushing the buffer at program termination. llvm-svn: 92001
48 lines
1.3 KiB
C++
48 lines
1.3 KiB
C++
//===- circulat_raw_ostream.cpp - Implement the circular_raw_ostream class -===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// 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(Size, 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(void) {
|
|
if (BufferSize != 0) {
|
|
// Write out the buffer
|
|
int num = std::strlen(Banner);
|
|
TheStream->write(Banner, num);
|
|
flushBuffer();
|
|
}
|
|
}
|