зеркало из https://github.com/mozilla/gecko-dev.git
116 строки
3.2 KiB
C++
116 строки
3.2 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
|
|
|
|
#include "mozilla/HashFunctions.h"
|
|
|
|
#include "ProfileJSONWriter.h"
|
|
|
|
void
|
|
ChunkedJSONWriteFunc::Write(const char* aStr)
|
|
{
|
|
MOZ_ASSERT(mChunkPtr >= mChunkList.back().get() && mChunkPtr <= mChunkEnd);
|
|
MOZ_ASSERT(mChunkEnd >= mChunkList.back().get() + mChunkLengths.back());
|
|
MOZ_ASSERT(*mChunkPtr == '\0');
|
|
|
|
size_t len = strlen(aStr);
|
|
|
|
// Most strings to be written are small, but subprocess profiles (e.g.,
|
|
// from the content process in e10s) may be huge. If the string is larger
|
|
// than a chunk, allocate its own chunk.
|
|
char* newPtr;
|
|
if (len >= kChunkSize) {
|
|
AllocChunk(len + 1);
|
|
newPtr = mChunkPtr + len;
|
|
} else {
|
|
newPtr = mChunkPtr + len;
|
|
if (newPtr >= mChunkEnd) {
|
|
AllocChunk(kChunkSize);
|
|
newPtr = mChunkPtr + len;
|
|
}
|
|
}
|
|
|
|
memcpy(mChunkPtr, aStr, len);
|
|
*newPtr = '\0';
|
|
mChunkPtr = newPtr;
|
|
mChunkLengths.back() += len;
|
|
}
|
|
|
|
mozilla::UniquePtr<char[]>
|
|
ChunkedJSONWriteFunc::CopyData() const
|
|
{
|
|
MOZ_ASSERT(mChunkLengths.length() == mChunkList.length());
|
|
size_t totalLen = 1;
|
|
for (size_t i = 0; i < mChunkLengths.length(); i++) {
|
|
MOZ_ASSERT(strlen(mChunkList[i].get()) == mChunkLengths[i]);
|
|
totalLen += mChunkLengths[i];
|
|
}
|
|
mozilla::UniquePtr<char[]> c = mozilla::MakeUnique<char[]>(totalLen);
|
|
char* ptr = c.get();
|
|
for (size_t i = 0; i < mChunkList.length(); i++) {
|
|
size_t len = mChunkLengths[i];
|
|
memcpy(ptr, mChunkList[i].get(), len);
|
|
ptr += len;
|
|
}
|
|
*ptr = '\0';
|
|
return c;
|
|
}
|
|
|
|
void
|
|
ChunkedJSONWriteFunc::Take(ChunkedJSONWriteFunc&& aOther)
|
|
{
|
|
for (size_t i = 0; i < aOther.mChunkList.length(); i++) {
|
|
MOZ_ALWAYS_TRUE(mChunkLengths.append(aOther.mChunkLengths[i]));
|
|
MOZ_ALWAYS_TRUE(mChunkList.append(mozilla::Move(aOther.mChunkList[i])));
|
|
}
|
|
mChunkPtr = mChunkList.back().get() + mChunkLengths.back();
|
|
mChunkEnd = mChunkPtr;
|
|
aOther.mChunkPtr = nullptr;
|
|
aOther.mChunkEnd = nullptr;
|
|
aOther.mChunkList.clear();
|
|
aOther.mChunkLengths.clear();
|
|
}
|
|
|
|
void
|
|
ChunkedJSONWriteFunc::AllocChunk(size_t aChunkSize)
|
|
{
|
|
MOZ_ASSERT(mChunkLengths.length() == mChunkList.length());
|
|
mozilla::UniquePtr<char[]> newChunk = mozilla::MakeUnique<char[]>(aChunkSize);
|
|
mChunkPtr = newChunk.get();
|
|
mChunkEnd = mChunkPtr + aChunkSize;
|
|
*mChunkPtr = '\0';
|
|
MOZ_ALWAYS_TRUE(mChunkLengths.append(0));
|
|
MOZ_ALWAYS_TRUE(mChunkList.append(mozilla::Move(newChunk)));
|
|
}
|
|
|
|
void
|
|
SpliceableJSONWriter::TakeAndSplice(ChunkedJSONWriteFunc* aFunc)
|
|
{
|
|
Separator();
|
|
for (size_t i = 0; i < aFunc->mChunkList.length(); i++) {
|
|
WriteFunc()->Write(aFunc->mChunkList[i].get());
|
|
}
|
|
aFunc->mChunkPtr = nullptr;
|
|
aFunc->mChunkEnd = nullptr;
|
|
aFunc->mChunkList.clear();
|
|
aFunc->mChunkLengths.clear();
|
|
mNeedComma[mDepth] = true;
|
|
}
|
|
|
|
void
|
|
SpliceableJSONWriter::Splice(const char* aStr)
|
|
{
|
|
Separator();
|
|
WriteFunc()->Write(aStr);
|
|
mNeedComma[mDepth] = true;
|
|
}
|
|
|
|
void
|
|
SpliceableChunkedJSONWriter::TakeAndSplice(ChunkedJSONWriteFunc* aFunc)
|
|
{
|
|
Separator();
|
|
WriteFunc()->Take(mozilla::Move(*aFunc));
|
|
mNeedComma[mDepth] = true;
|
|
}
|