关于C++名称修饰的解析
曾有人发过该功能代码，然而近日发现微软已经提供了专用API实现这一功能，而且比较复杂。该函数为UnDecorateSymbolName，为调试API之一，下面是测试用例：#include <windows.h>#include <DbgHelp.h>
#include <iostream>
using namespace std;
#pragma comment(lib,"Dbghelp.lib")
void main()
{
char str;
strcpy(str,"?getArgumentTypes@UnDecorator@@CG?AVDName@@XZ");
UnDecorateSymbolName(str,str,100,UNDNAME_COMPLETE);
cout<<str<<endl;
}为了了解该函数运作原理，我进行资料搜索和部分逆向工作，下面代码便是我的成果：#include <windows.h>
#include "undname.h"
#include <iostream>
using namespace std;
HANDLE hHeap=NULL;
void * AllocIt( size_t dwBytes)
{
if(dwBytes == 0)
return NULL;
LPVOID lpMem=HeapAlloc(hHeap,HEAP_ZERO_MEMORY,dwBytes);
if(!lpMem)
SetLastError(ERROR_NOT_ENOUGH_MEMORY);
return lpMem;
}
void FreeIt(void* lpMem)
{
if(lpMem)
HeapFree(hHeap,0,lpMem);
}
DWORD __stdcall MyUnDecorateSymbolName(
PCTSTR DecoratedName,//经过C++修饰的字符串
PTSTR UnDecoratedName,//去修饰的字符串
DWORD UndecoreatedLength,//修饰字符串长度
DWORD Flags)//去修饰标志位
{
int retlen;
if(DecoratedName == NULL || UnDecoratedName == NULL || UndecoreatedLength < 2)
{
SetLastError(ERROR_INVALID_PARAMETER);
return 0;
}
retlen=0;
__try
{
if(unDName(UnDecoratedName,DecoratedName,UndecoreatedLength-1,AllocIt,FreeIt,(WORD)Flags))
{
retlen=strlen(UnDecoratedName);
}
}
__except(1)
{
if(retlen == 0)
SetLastError(ERROR_INVALID_PARAMETER);
}
return retlen;
}
void main()
{
hHeap=HeapCreate(0,0x100000,0);
if(!hHeap)
return;
char str;
strcpy(str,"?getArgumentTypes@UnDecorator@@CG?AVDName@@XZ");
MyUnDecorateSymbolName(str,str,100,UNDNAME_COMPLETE);
cout<<str<<endl;
HeapDestroy(hHeap);
}运行结果：private: static class DName__stdcall UnDecorator::getArgumentTypes(void)
你会用到的工程文件，均出自W2K源码：
undname.cxx
undname.h
undname.hxx
undname.inl
由于总共5000+代码较多，因此后面有时间我会做详细解释
你让我想起了之前我们吵架的内容。。。好吧看来还是不提黑历史的好
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