react-native/ReactCommon/cxxreact/JSIndexedRAMBundle.h

66 lines
1.7 KiB
C++

// Copyright 2004-present Facebook. All Rights Reserved.
#pragma once
#include <fstream>
#include <memory>
#include <cxxreact/JSBigString.h>
#include <cxxreact/JSModulesUnbundle.h>
#ifndef RN_EXPORT
#define RN_EXPORT __attribute__((visibility("default")))
#endif
namespace facebook {
namespace react {
class RN_EXPORT JSIndexedRAMBundle : public JSModulesUnbundle {
public:
static std::function<std::unique_ptr<JSModulesUnbundle>(std::string)> buildFactory();
// Throws std::runtime_error on failure.
JSIndexedRAMBundle(const char *sourceURL);
// Throws std::runtime_error on failure.
std::unique_ptr<const JSBigString> getStartupCode();
// Throws std::runtime_error on failure.
Module getModule(uint32_t moduleId) const override;
private:
struct ModuleData {
uint32_t offset;
uint32_t length;
};
static_assert(
sizeof(ModuleData) == 8,
"ModuleData must not have any padding and use sizes matching input files");
struct ModuleTable {
size_t numEntries;
std::unique_ptr<ModuleData[]> data;
ModuleTable() : numEntries(0) {};
ModuleTable(size_t entries) :
numEntries(entries),
data(std::unique_ptr<ModuleData[]>(new ModuleData[numEntries])) {};
size_t byteLength() const {
return numEntries * sizeof(ModuleData);
}
};
std::string getModuleCode(const uint32_t id) const;
void readBundle(char *buffer, const std::streamsize bytes) const;
void readBundle(
char *buffer, const
std::streamsize bytes,
const std::ifstream::pos_type position) const;
mutable std::ifstream m_bundle;
ModuleTable m_table;
size_t m_baseOffset;
std::unique_ptr<JSBigBufferString> m_startupCode;
};
} // namespace react
} // namespace facebook