[HELP] Explain me please how this function works

Hi,
Anyone here can tell me what this function do?

PHP Code:


			
DWORD SearchPattern(char* pattern,DWORD start_offset ,DWORD ende)

{

        DWORD offset=start_offset;

        DWORD start=offset; 

        DWORD backoffset=0;

        DWORD size =strlen(pattern)-1;

        DWORD foundoffset=0;

 

        char * pEnd=pattern;

        while(1)

        {

                char &myposition=*(char*)offset;

                if ((pEnd[1]!='x'))

                {

                        char temp=(char)strtoul(pEnd, &pEnd, 0x10);

                        if (temp==myposition)

                        {

                                if (foundoffset==0)

                                {

                                        foundoffset=offset;

                                }

                        }

                        else

                        {

                                pEnd=pattern;

                                if (foundoffset != 0)

                                        offset=foundoffset;

                                foundoffset=0;

                        }

                }

                else

                {

                 pEnd=&pEnd[2];

                }

                offset++;

                if (((DWORD)pEnd-(DWORD)pattern>=size)||(offset>=ende))

                        break;

        }

        return foundoffset;

}

Execution:

PHP Code:


			
SearchPattern("55 8B EC 83 EC 18 83 3D x x x x 00 74 07 33 C0 E9 x x x x 8A 45 08",0x00400000,0x007FFFFF);

I dont understand that:

PHP Code:


			
char &myposition=*(char*)offset;