怀旧之使用汇编启动hge

虽然其实只是抄了一遍而已，不过之后我会考虑使用纯汇编启动一次看看

hge = hgeCreate(HGE_VERSION);hge->System_SetState(HGE_FRAMEFUNC, FrameFunc);hge->System_SetState(HGE_WINDOWED, true);if(hge->System_Initiate()){hge->System_Start();hge->System_Shutdown();}hge->Release();

首先是C++的代码。以上代码就足以运行一个简单的hge了，当然库和头文件自己导进去，全局的hge指针也需要声明下。

__asm{push        180hcall        hgeCreatemov         ecx,dword ptr [eax]mov         edx,dword ptr [ecx+24h] push        offset FrameFuncpush        8    push        eax  mov         dword ptr [hge],eax call        edx mov         eax,dword ptr [hge] mov         ecx,dword ptr [eax] mov         edx,dword ptr [ecx+20h] push        1    push        1    push        eax  call        edx  mov         eax,dword ptr [hge] mov         ecx,dword ptr [eax] mov         edx,dword ptr [ecx+4] push        eax  call        edx  test        al,al je          ENDMARKmov         eax,dword ptr [hge] mov         ecx,dword ptr [eax] mov         edx,dword ptr [ecx+0Ch] push        eax  call        edx mov         eax,dword ptr [hge] mov         ecx,dword ptr [eax] mov         edx,dword ptr [ecx+8] push        eax  call        edx ENDMARK:mov         eax,dword ptr [hge] mov         ecx,dword ptr [eax] mov         edx,dword ptr [ecx] push        eax  call        edx  }

用内联汇编的话就是这个感觉。可以看到虚函数其实就是每次偏移然后call，hge指针包含了虚函数表的起始地址，每次根据偏移调用不同的函数，然后还要传入this指针，这一步跟C如出一辙，但是简化了调用过程。hge是stdcall，所以堆栈也不用自己手动恢复了。

ecx,dword ptr [eax]

其实我并不理解这句的用意。看起来是将hge的地址给eax，而又将eax的地址给力ecx，其实是完全没有理解dword ptr的含义，继续慢慢看书吧

果然内联什么的还是有点太弱了的感觉，直接使用win32汇编吧，原本编译出来7k的程序，一下子变成了2.5k

.386 .model flat,stdcall option casemap:none hgeCreate proto :DWORDinclude \masm32\include\windows.inc include \masm32\include\kernel32.inc includelib \masm32\lib\kernel32.lib includelib hge.lib includelib hgehelp.lib.datahge DWORD ?.codestart:push        180hcall        hgeCreatemov         ecx,dword ptr [eax]mov         edx,dword ptr [ecx+24h] push        offset FrameFuncpush        8    push        eax  mov         dword ptr [hge],eax call        edx mov         eax,dword ptr [hge] mov         ecx,dword ptr [eax]mov         edx,dword ptr [ecx+20h] push        1    push        1    push        eax  call        edx  mov         eax,dword ptr [hge] mov         ecx,dword ptr [eax] mov         edx,dword ptr [ecx+4] push        eax  call        edx  test        al,al je          ENDMARKmov         eax,dword ptr [hge] mov         ecx,dword ptr [eax] mov         edx,dword ptr [ecx+0Ch] push        eax  call        edx mov         eax,dword ptr [hge] mov         ecx,dword ptr [eax] mov         edx,dword ptr [ecx+8] push        eax  call        edx ENDMARK:mov         eax,dword ptr [hge] mov         ecx,dword ptr [eax] mov         edx,dword ptr [ecx] push        eax  call        edx  invoke ExitProcess,0FrameFunc procxor         al,al retFrameFunc endpend start