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