_get_next_member_name怎么实现

`_get_next_member_name` 函数的实现需要用到一些Windows API，具体来说是 `ImageNtHeader`、`ImageDirectoryEntryToData`、`ImageRvaToVa` 等函数。以下是一个简单的实现示例代码：

#include <Windows.h>
#include <DbgHelp.h>

const char* _get_next_member_name(const char* className, size_t* offset) {
    const char* memberName = nullptr;
    IMAGE_DOS_HEADER* pDosHeader = (IMAGE_DOS_HEADER*)GetModuleHandle(nullptr);
    IMAGE_NT_HEADERS* pNTHeader = (IMAGE_NT_HEADERS*)((DWORD_PTR)pDosHeader + pDosHeader->e_lfanew);
    IMAGE_SECTION_HEADER* pSectionHeader = IMAGE_FIRST_SECTION(pNTHeader);

    for (int i = 0; i < pNTHeader->FileHeader.NumberOfSections; i++) {
        if (strcmp((char*)pSectionHeader->Name, ".rdata") == 0) {
            DWORD_PTR rdataBase = (DWORD_PTR)GetModuleHandle(nullptr) + pSectionHeader->VirtualAddress;
            DWORD_PTR rdataEnd = rdataBase + pSectionHeader->Misc.VirtualSize;

            PIMAGE_SECTION_HEADER pRdataHeader = pSectionHeader;
            PIMAGE_SECTION_HEADER pRsrcHeader = pSectionHeader + 1;
            DWORD_PTR rsrcBase = (DWORD_PTR)GetModuleHandle(nullptr) + pRsrcHeader->VirtualAddress;
            DWORD_PTR rsrcEnd = rsrcBase + pRsrcHeader->Misc.VirtualSize;

            IMAGE_RESOURCE_DIRECTORY* pRootDirectory = (IMAGE_RESOURCE_DIRECTORY*)rsrcBase;
            IMAGE_RESOURCE_DIRECTORY_ENTRY* pRootEntry = (IMAGE_RESOURCE_DIRECTORY_ENTRY*)(pRootDirectory + 1);

            int typeOffset = 0x0;
            IMAGE_RESOURCE_DIRECTORY* pTypeDirectory = nullptr;
            IMAGE_RESOURCE_DIRECTORY_ENTRY* pTypeEntry = nullptr;
            IMAGE_RESOURCE_DIRECTORY* pNameDirectory = nullptr;
            IMAGE_RESOURCE_DIRECTORY_ENTRY* pNameEntry = nullptr;
            IMAGE_RESOURCE_DIRECTORY* pLanguageDirectory = nullptr;
            IMAGE_RESOURCE_DIRECTORY_ENTRY* pLanguageEntry = nullptr;

            for (int rootIndex = 0; rootIndex < pRootDirectory->NumberOfIdEntries + pRootDirectory->NumberOfNamedEntries; rootIndex++) {
                if (pRootEntry[rootIndex].NameIsString) {
                    IMAGE_RESOURCE_DIR_STRING_U* pName = (IMAGE_RESOURCE_DIR_STRING_U*)(rsrcBase + pRootEntry[rootIndex].NameOffset);
                    if (wcsncmp(pName->NameString, L"TYPEINFO", pName->Length) == 0) {
                        typeOffset = pRootEntry[rootIndex].OffsetToDirectory;
                        break;
                    }
                }
            }

            if (typeOffset > 0) {
                pTypeDirectory = (IMAGE_RESOURCE_DIRECTORY*)(rsrcBase + typeOffset);
                pTypeEntry = (IMAGE_RESOURCE_DIRECTORY_ENTRY*)(pTypeDirectory + 1);

                for (int typeIndex = 0; typeIndex < pTypeDirectory->NumberOfIdEntries + pTypeDirectory->NumberOfNamedEntries; typeIndex++) {
                    if (!pTypeEntry[typeIndex].NameIsString) {
                        if (pTypeEntry[typeIndex].Id == 0x7) {
                            pNameDirectory = (IMAGE_RESOURCE_DIRECTORY*)(rsrcBase + pTypeEntry[typeIndex].OffsetToDirectory);
                            pNameEntry = (IMAGE_RESOURCE_DIRECTORY_ENTRY*)(pNameDirectory + 1);

                            for (int nameIndex = 0; nameIndex < pNameDirectory->NumberOfIdEntries + pNameDirectory->NumberOfNamedEntries; nameIndex++) {
                                if (pNameEntry[nameIndex].NameIsString) {
                                    IMAGE_RESOURCE_DIR_STRING_U* pName = (IMAGE_RESOURCE_DIR_STRING_U*)(rsrcBase + pNameEntry[nameIndex].NameOffset);
                                    if (strcmp((char*)pName->NameString, className) == 0) {
                                        pLanguageDirectory = (IMAGE_RESOURCE_DIRECTORY*)(rsrcBase + pNameEntry[nameIndex].OffsetToDirectory);
                                        pLanguageEntry = (IMAGE_RESOURCE_DIRECTORY_ENTRY*)(pLanguageDirectory + 1);

                                        for (int languageIndex = 0; languageIndex < pLanguageDirectory->NumberOfIdEntries + pLanguageDirectory->NumberOfNamedEntries; languageIndex++) {
                                            if (!pLanguageEntry[languageIndex].NameIsString) {
                                                DWORD_PTR symbolAddress = (DWORD_PTR)ImageDirectoryEntryToData(GetModuleHandle(nullptr), TRUE, IMAGE_DIRECTORY_ENTRY_EXPORT);
                                                PIMAGE_EXPORT_DIRECTORY pExportDirectory = (PIMAGE_EXPORT_DIRECTORY)symbolAddress;
                                                DWORD_PTR* pFuncAddress = (DWORD_PTR*)(symbolAddress + (DWORD_PTR)pExportDirectory->AddressOfFunctions);
                                                DWORD_PTR* pNameAddress = (DWORD_PTR*)(symbolAddress + (DWORD_PTR)pExportDirectory->AddressOfNames);
                                                WORD* pOrdinalAddress = (WORD*)(symbolAddress + (DWORD_PTR)pExportDirectory->AddressOfNameOrdinals);

                                                DWORD_PTR classVTableAddress = 0;
                                                for (int i = 0; i < pExportDirectory->NumberOfFunctions; i++) {
                                                    if (strcmp((char*)(symbolAddress + pNameAddress[i]), className) == 0) {
                                                        classVTableAddress = (DWORD_PTR)pFuncAddress[pOrdinalAddress[i]];
                                                        break;
                                                    }
                                                }

                                                if (classVTableAddress > 0) {
                                                    DWORD_PTR* pVTable = (DWORD_PTR*)*(DWORD_PTR*)classVTableAddress;
                                                    int memberIndex = 0;
                                                    while (true) {
                                                        DWORD_PTR* pMemberAddress = (DWORD_PTR*)(pVTable[memberIndex]);
                                                        if (*pMemberAddress == 0) {
                                                            break;
                                                        }
                                                        if (*pMemberAddress >= rdataBase && *pMemberAddress < rdataEnd) {
                                                            DWORD_PTR memberOffset = *pMemberAddress - rdataBase;
                                                            if (memberOffset == *offset) {
                                                                memberName = (const char*)(pMemberAddress + 1);
                                                                *offset += sizeof(DWORD_PTR);
                                                                break;
                                                            }
                                                        }
                                                        memberIndex++;
                                                    }
                                                }
                                            }
                                            if (memberName != nullptr) {
                                                break;
                                            }
                                            pLanguageEntry++;
                                        }
                                    }
                                }
                                if (memberName != nullptr) {
                                    break;
                                }
                                pNameEntry++;
                            }
                        }
                    }
                    if (memberName != nullptr) {
                        break;
                    }
                    pTypeEntry++;
                }
            }
            break;
        }
        pSectionHeader++;
    }

    return memberName;
}

需要注意的是，由于这个函数的实现依赖于一些Windows API，因此在使用前需要先添加相关的头文件和库文件，并且在调用该函数时需要保证程序已经加载了相关的模块。