帮我写一下反序列化的c++代码，读到type_offset 和 boundary中 extern const char g_type_section []; unsigned long type_offset; bool boundary;

以下是针对大端模式和小端模式分别编写C++代码的示例，用于反序列化`type_offset`和`boundary`：

#include <iostream>
#include <string>
#include <endian>

// 根据endianness读取数据
bool readBoundaryAndTypeOffset(const char *data, size_t length, bool isBigEndian) {
    if (length < 5) { // 假设边界值占1位，offset占4位，共5个字节
        std::cerr << "Insufficient data to deserialize." << std::endl;
        return false;
    }

    char boundaryChar = data[0];
    if (!isBigEndian) {
        // 如果是小端模式，交换边界值和offset的字节顺序
        boundaryChar = data[length - 1];
        unsigned long offsetBytes = 0;
        for (size_t i = 1; i < 5; ++i) {
            offsetBytes |= static_cast<unsigned long>(data[i]) << (8 * (4 - (i % 4)));
        }
    } else {
        offsetBytes = 0;
        for (size_t i = 0; i < 4; ++i) {
            offsetBytes |= static_cast<unsigned long>(data[i + 1]) << (8 * i);
        }
    }

    boundary = boundaryChar != '0';
    type_offset = endian::native_to_big(offsetBytes);

    return true;
}

int main() {
    const char *g_type_section = ...; // 实际上应该是数组地址

    size_t g_type_section_length = strlen(g_type_section); // 获取数组长度
    bool isBigEndian = ...; // 如果不知道endianness，通常平台默认可能是true（大端模式）

    if (readBoundaryAndTypeOffset(g_type_section, g_type_section_length, isBigEndian)) {
        std::cout << "Boundary: " << (boundary ? "true" : "false") << std::endl;
        std::cout << "Type Offset: " << type_offset << std::endl;
    } else {
        std::cout << "Deserialization failed." << std::endl;
    }

    return 0;
}

在这个例子中，`readBoundaryAndTypeOffset`函数根据endianness读取边界值和类型偏移量。如果endianness未知，你可能需要额外的判断逻辑或询问用户或系统设置。如果你确定了endianness，只需传入相应的值即可。