LLVM 20.0.0git
circular_raw_ostream.cpp
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1//===- circular_raw_ostream.cpp - Implement circular_raw_ostream ----------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8//
9// This implements support for circular buffered streams.
10//
11//===----------------------------------------------------------------------===//
12
14#include <algorithm>
15using namespace llvm;
16
17void circular_raw_ostream::write_impl(const char *Ptr, size_t Size) {
18 if (BufferSize == 0) {
19 TheStream->write(Ptr, Size);
20 return;
21 }
22
23 // Write into the buffer, wrapping if necessary.
24 while (Size != 0) {
25 unsigned Bytes =
26 std::min(unsigned(Size), unsigned(BufferSize - (Cur - BufferArray)));
27 memcpy(Cur, Ptr, Bytes);
28 Size -= Bytes;
29 Cur += Bytes;
30 if (Cur == BufferArray + BufferSize) {
31 // Reset the output pointer to the start of the buffer.
32 Cur = BufferArray;
33 Filled = true;
34 }
35 }
36}
37
39 if (BufferSize != 0) {
40 // Write out the buffer
41 TheStream->write(Banner, std::strlen(Banner));
42 flushBuffer();
43 }
44}
uint64_t Size
void flushBufferWithBanner()
flushBufferWithBanner - Force output of the buffer along with a small header.
raw_ostream & write(unsigned char C)
This is an optimization pass for GlobalISel generic memory operations.
Definition: AddressRanges.h:18