我正在尝试使用Boost序列化包含向量和整数的minHeap
对象。
struct minHeap {
std::vector<keyNode> heapStructure; // A vector of many keyNodes
int size; // Current size of vector
minHeap() {
size = 0;
}
private:
friend class boost::serialization::access;
template<class Archive>
void serialize(Archive & ar, const unsigned version)
{
ar & heapStructure;
ar & size;
}
};
现在heapStructure
是keyNode
的向量,每个keyNode
包含一个字符,整数和对象keyNode
本身的两个指针。
struct keyNode {
char data; // The character itself
int frequency; // Occurances of the character in the data stream.
keyNode * leftNode, *rightNode; // Left and right children of the root node (the keyNode itself)
keyNode() {
data = NULL;
frequency = 0;
leftNode = NULL;
rightNode = NULL;
}
private:
friend class boost::serialization::access;
template<class Archive>
void serialize(Archive & ar, const unsigned version)
{
ar &data;
ar &frequency;
ar &leftNode;
ar &rightNode;
}
};
以下(示例)代码显示了我如何序列化和反序列化文件。
// Write Encoded Stream to File
ofstream outFile;
string outPath = filePath + ".enc";
outFile.open(outPath, ios::out | ios::binary); // TODO: Fix the output path
bitsetR bitStorage(outputStream);
boost::archive::binary_oarchive output(outFile);
output << bitStorage;
output << hTree;
outFile.close();
ifstream inFile;
inFile.open("demo.txt.enc"); // TODO: Fix the output path
bitsetR bitStr("");
boost::archive::binary_iarchive input(inFile);
minHeap temp;
input >> bitStr;
input >> temp;
序列化时没有出现任何错误,但反序列化失败并出现以下错误(VS 2017):
Exception Thrown: Input Stream Error (boost::archive::archive_exception)
我应该在此注意bitsetR
对象成功反序列化。反序列化minHeap
对象时抛出异常。
答案 0 :(得分:0)
我认为所需要的只是以正确的顺序正确刷新和关闭存档和流。这段代码工作正常:
<强> Live On Coliru 强>
#include <boost/serialization/serialization.hpp>
#include <boost/serialization/access.hpp>
#include <boost/serialization/vector.hpp>
struct keyNode {
char data = 0; // The character itself
int frequency = 0; // Occurances of the character in the data stream.
keyNode *leftNode = nullptr;
keyNode *rightNode = nullptr; // Left and right children of the root node (the keyNode itself)
private:
friend class boost::serialization::access;
template <class Archive> void serialize(Archive &ar, unsigned) {
ar &data;
ar &frequency;
ar &leftNode;
ar &rightNode;
}
};
struct minHeap {
std::vector<keyNode> heapStructure; // A vector of many keyNodes
size_t size() const { return heapStructure.size(); }
private:
friend class boost::serialization::access;
template <class Archive> void serialize(Archive &ar, unsigned) {
ar &heapStructure;
}
};
#include <boost/archive/binary_oarchive.hpp>
#include <boost/archive/binary_iarchive.hpp>
#include <fstream>
int main() {
minHeap hTree;
{
std::ofstream outFile("demo.txt.enc", std::ios::binary);
{
boost::archive::binary_oarchive output(outFile);
output << hTree;
}
}
{
std::ifstream inFile("demo.txt.enc");
boost::archive::binary_iarchive input(inFile);
minHeap temp;
input >> temp;
}
}
注意我可以通过删除范围使其失败并显示类似的消息:
int main() {
minHeap hTree;
std::ofstream outFile("demo.txt.enc", std::ios::binary);
boost::archive::binary_oarchive output(outFile);
output << hTree;
std::ifstream inFile("demo.txt.enc");
boost::archive::binary_iarchive input(inFile);
minHeap temp;
input >> temp;
}
terminate called after throwing an instance of 'boost::archive::archive_exception'
what(): input stream error
bash: line 7: 16838 Aborted (core dumped) ./a.out