Function at 0x405cb0
Capabilities:
Get file size
Read file on windows

Disassembly:
sub esp, 0x18
mov ecx, dword [esp + 0x34]
push ebx
push ebp
push esi
push edi
lea ebp, [eax + 0xccc]
mov eax, dword [eax]
push ecx
push eax
mov dword [esp + 0x24], eax
call dword [sym.imp.KERNEL32.dll_GetFileSizeEx]
test eax, eax
jne 0x405cef
push 0x50ea8c
mov eax, 0x50ea8c
call fcn.004086c0
add esp, 4
xor eax, eax
pop edi
pop esi
pop ebp
pop ebx
add esp, 0x18
ret
mov ecx, dword [esp + 0x2c]
xor eax, eax
add ecx, 8
xor edi, edi
xor ebx, ebx
cmp eax, dword [esp + 0x30]
mov dword [esp + 0x20], eax
mov dword [esp + 0x14], ecx
jne 0x405d17
mov edx, dword [esp + 0x44]
mov esi, dword [edx]
mov eax, edx
mov eax, dword [eax + 4]
jmp 0x405d1d
mov esi, dword [ecx - 8]
mov eax, dword [ecx - 4]
sub esi, edi
sbb eax, ebx
mov edx, esi
shrd edx, eax, 0xf
shr eax, 0xf
and esi, 0x7fff
mov dword [esp + 0x18], edx
jne 0x405d3d
mov esi, 0x8000
jmp 0x405d42
inc edx
mov dword [esp + 0x18], edx
test edx, edx
jbe 0x405dd4
mov ecx, dword [esp + 0x1c]
push 0
push 0
push ebx
push edi
push ecx
call dword [sym.imp.KERNEL32.dll_SetFilePointerEx]
test eax, eax
je 0x405cd3
mov eax, dword [esp + 0x1c]
push 0
lea edx, [esp + 0x28]
push edx
push esi
push ebp
push eax
call dword [sym.imp.KERNEL32.dll_ReadFile]
test eax, eax
je 0x405cd3
cmp esi, dword [esp + 0x24]
jne 0x405eac
mov eax, dword [esp + 0x34]
test eax, eax
je 0x405da2
mov ecx, dword [esp + 0x38]
push esi
push ebp
push ecx
call eax
test eax, eax
je 0x405ee4
mov eax, dword [esp + 0x3c]
test eax, eax
je 0x405dbb
mov edx, dword [esp + 0x40]
push esi
push ebp
push edx
call eax
test eax, eax
je 0x405ee4
add edi, esi
adc ebx, 0
sub dword [esp + 0x18], 1
mov esi, 0x8000
jne 0x405d4a
mov ecx, dword [esp + 0x14]
mov eax, dword [esp + 0x20]
cmp eax, dword [esp + 0x30]
jae 0x405e89
mov esi, dword [ecx]
test esi, esi
je 0x405e9f
cmp dword [ecx + 8], 0
jne 0x405e3f
push 0
push 0
push ebx
push edi
mov edi, dword [esp + 0x2c]
push edi
call dword [sym.imp.KERNEL32.dll_SetFilePointerEx]
test eax, eax
je 0x405cd3
mov ecx, ebp
mov edx, edi
call fcn.00405260
test eax, eax
je 0x405ef6
mov eax, dword [esp + 0x3c]
test eax, eax
je 0x405e3b
mov ecx, dword [esp + 0x14]
mov edx, dword [ecx]
mov ecx, dword [esp + 0x40]
push edx
push ebp
push ecx
call eax
test eax, eax
je 0x405ee4
mov ecx, dword [esp + 0x14]
mov esi, dword [esp + 0x34]
test esi, esi
je 0x405e79
cmp dword [ecx + 4], 0
je 0x405e79
mov eax, dword [ecx]
cmp eax, 0x8000
ja 0x405ec8
push eax
push 0
push ebp
call fcn.004b47e0
mov edx, dword [esp + 0x20]
mov eax, dword [edx]
mov ecx, dword [esp + 0x44]
add esp, 0xc
push eax
push ebp
push ecx
call esi
test eax, eax
je 0x405ee4
mov ecx, dword [esp + 0x14]
mov edi, dword [ecx]
mov ebx, dword [ecx - 4]
mov eax, dword [esp + 0x20]
xor edx, edx
add edi, dword [ecx - 8]
adc ebx, edx
inc eax
add ecx, 0x18
mov dword [esp + 0x20], eax
mov dword [esp + 0x14], ecx
cmp eax, dword [esp + 0x30]
jbe 0x405d08
mov eax, 1
pop edi
pop esi
pop ebp
pop ebx
add esp, 0x18
ret
mov eax, 1
push 0x50ea8c
call fcn.00408730
add esp, 4
xor eax, eax
pop edi
pop esi
pop ebp
pop ebx
add esp, 0x18
ret
mov eax, 8
push 0x50ea8c
call fcn.00408730
add esp, 4
xor eax, eax
pop edi
pop esi
pop ebp
pop ebx
add esp, 0x18
ret
mov eax, 0x11
push 0x50ea8c
call fcn.00408730
add esp, 4
pop edi
pop esi
pop ebp
xor eax, eax
pop ebx
add esp, 0x18
ret