Garena BS's File Checking Function

int __thiscall sub_10047690(int this, const char *a2)
{
int v2; // ebp@1
HANDLE v3; // eax@5
void *v4; // esi@5
struct _RTL_CRITICAL_SECTION *v5; // ecx@6
DWORD v6; // ebp@7
void *v7; // edi@7
unsigned int v8; // ecx@10
void *v10; // [sp-4h] [bp-4Ch]@16
char v11; // [sp+13h] [bp-35h]@1
struct _RTL_CRITICAL_SECTION *v12; // [sp+14h] [bp-34h]@1
DWORD NumberOfBytesRead; // [sp+18h] [bp-30h]@7
void *v14; // [sp+20h] [bp-28h]@1
int v15; // [sp+30h] [bp-18h]@1
unsigned int v16; // [sp+34h] [bp-14h]@1
int v17; // [sp+44h] [bp-4h]@1


v2 = this + 264;
v12 = (struct _RTL_CRITICAL_SECTION *)(this + 264);
sub_1004A2D0((LPCRITICAL_SECTION)(this + 264));
v11 = 5;
v16 = 15;
v15 = 0;
//Found By Xorr
LOBYTE(v14) = 0;
sub_100033F0(a2, strlen(a2));
v17 = 0;
if ( sub_10041BF0("_SG", 0, 3) != -1 )
v11 = 6;
strncpy(FileName, a2, 0x303u);
_strlwr(FileName);
_splitpath(FileName, byte_101B580C, byte_101B5810, byte_101B5910, byte_101B5A10);
if ( *(_DWORD *)(dword_101B56A8 + 260) )
sprintf(byte_101B5A10, ".bsv");
_makepath(FileName, byte_101B580C, byte_101B5810, byte_101B5910, byte_101B5A10);
v3 = CreateFileA(FileName, 0x80000000u, 1u, 0, 3u, 0x80u, 0);
v4 = v3;
//Found By Xorr
if ( v3 == (HANDLE)-1 )
{
MessageBoxA(0, FileName, "error", 0);
v5 = (struct _RTL_CRITICAL_SECTION *)v2;
goto LABEL_18;
}
v6 = GetFileSize(v3, 0);
NumberOfBytesRead = 0;
v7 = operator new(v6);
if ( ReadFile(v4, v7, v6, &NumberOfBytesRead, 0) )
{
CloseHandle(v4);
if ( *(_DWORD *)(dword_101B56A8 + 260) )
{
v8 = 0;
if ( v6 )
{
do
{
*((_BYTE *)v7 + v8) -= v8 * v8 % (unsigned __int8)v11;
++v8;
}
while ( v8 < v6 );
}
}
if ( !*(_DWORD *)dword_101B56A8 || !sub_101374F0(*(_DWORD *)dword_101B56A8, v7, v6, a2) )
{
j_j__free(v7);
v5 = v12;
LABEL_18:
sub_1004A2F0(v5);
if ( v16 >= 0x10 )
{
v10 = v14;
goto LABEL_20;
}
return unknown_libname_11();
}
j_j__free(v7);
MessageBoxA(0, "3 Can't find blackshot files. Please re-install blackshot.", "error", 0);
}
else
{
j_j__free(v7);
MessageBoxA(0, "2 Can't find blackshot files. Please re-install blackshot.", "error", 0);
CloseHandle(v4);
}
sub_1004A2F0(v12);
if ( v16 >= 0x10 )
{
v10 = v14;
LABEL_20:
j__free(v10);
}
return unknown_libname_11();
}