mirror of
https://github.com/facebook/react-native.git
synced 2025-11-01 09:14:26 +00:00
Valentin Shergin
df229590b2
Summary: This part of the codebase is very perf sensitive and designed to work without exceptions enabled. Most of the method was `noexcept` all the time, but some of those missing that by mistake. Reviewed By: sammy-SC Differential Revision: D17629426 fbshipit-source-id: b311e4b7eff8e2b7cf29518288480d3a812dda44
107 lines
2.9 KiB
C++
107 lines
2.9 KiB
C++
/**
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* Copyright (c) Facebook, Inc. and its affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*/
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#include "RawPropsParser.h"
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#include <folly/Likely.h>
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#include <react/core/RawProps.h>
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namespace facebook {
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namespace react {
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RawValue const *RawPropsParser::at(
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RawProps const &rawProps,
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RawPropsKey const &key) const noexcept {
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if (UNLIKELY(!ready_)) {
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// This is not thread-safe part; this happens only during initialization of
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// a `ComponentDescriptor` where it is actually safe.
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keys_.push_back(key);
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nameToIndex_.insert(key, size_);
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size_++;
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return nullptr;
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}
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do {
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rawProps.keyIndexCursor_++;
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if (UNLIKELY(rawProps.keyIndexCursor_ >= size_)) {
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rawProps.keyIndexCursor_ = 0;
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}
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} while (UNLIKELY(key != keys_[rawProps.keyIndexCursor_]));
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auto valueIndex = rawProps.keyIndexToValueIndex_[rawProps.keyIndexCursor_];
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return valueIndex == kRawPropsValueIndexEmpty ? nullptr
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: &rawProps.values_[valueIndex];
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}
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void RawPropsParser::postPrepare() noexcept {
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ready_ = true;
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nameToIndex_.reindex();
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}
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void RawPropsParser::preparse(RawProps const &rawProps) const noexcept {
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rawProps.keyIndexToValueIndex_.resize(size_, kRawPropsValueIndexEmpty);
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// Resetting the cursor, the next increment will give `0`.
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rawProps.keyIndexCursor_ = size_ - 1;
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switch (rawProps.mode_) {
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case RawProps::Mode::Empty:
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return;
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case RawProps::Mode::JSI: {
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auto &runtime = *rawProps.runtime_;
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auto object = rawProps.value_.asObject(runtime);
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auto names = object.getPropertyNames(runtime);
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auto count = names.size(runtime);
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auto valueIndex = RawPropsValueIndex{0};
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for (auto i = 0; i < count; i++) {
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auto nameValue = names.getValueAtIndex(runtime, i).getString(runtime);
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auto value = object.getProperty(runtime, nameValue);
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auto name = nameValue.utf8(runtime);
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auto keyIndex = nameToIndex_.at(name.data(), name.size());
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if (keyIndex == kRawPropsValueIndexEmpty) {
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continue;
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}
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rawProps.keyIndexToValueIndex_[keyIndex] = valueIndex;
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rawProps.values_.push_back(
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RawValue(jsi::dynamicFromValue(runtime, value)));
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valueIndex++;
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}
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break;
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}
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case RawProps::Mode::Dynamic: {
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auto const &dynamic = rawProps.dynamic_;
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auto valueIndex = RawPropsValueIndex{0};
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for (auto const &pair : dynamic.items()) {
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auto name = pair.first.getString();
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auto keyIndex = nameToIndex_.at(name.data(), name.size());
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if (keyIndex == kRawPropsValueIndexEmpty) {
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continue;
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}
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rawProps.keyIndexToValueIndex_[keyIndex] = valueIndex;
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rawProps.values_.push_back(RawValue{pair.second});
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valueIndex++;
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}
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break;
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}
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}
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}
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} // namespace react
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} // namespace facebook
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