移除bzImage文件中'1f8b08'之前内容，存为gz文件

移除bzImage文件中'1f8b08'之前内容，存为gz文件

 

#include  < stdlib.h >
#include  < stdio.h >

int  _tmain( int  argc, _TCHAR *  argv[])
{
    FILE* r=fopen("linux26","rb");
    FILE* w=fopen("linux26.gz","wb");
    int s=0;
    for(;;)
    {
        unsigned char c;
        int l=fread(&c,1,1,r);
        if(l>=1)
        {
            if(s==3)
            {
                fwrite(&c,1,1,w);
            }
            else if(s==2)
            {
                if(c==0x08)
                {
                    c=0x1f;
                    fwrite(&c,1,1,w);
                    c=0x8b;
                    fwrite(&c,1,1,w);
                    c=0x08;
                    fwrite(&c,1,1,w);
                    ++s;
                }
                else
                {
                    s=0;
                }
            }
            else if(s==1)
            {
                if(c==0x8b)
                {
                    ++s;
                }
                else
                {
                    s=0;
                }
            }
            else if(s==0)
            {
                if(c==0x1f)
                {
                    ++s;
                }
            }
        }
        else
        {
            break;
        }
    }
    fclose(w);
    fclose(r);
    return 0;
}