Function at 0x403b20
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 0x403b66
push str.GetFileSizeEx__
push 0x11e
push str..QHImageHlp.c
xor edx, edx
call fcn.00406ae0
add esp, 0xc
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 0x403b8e
mov edx, dword [esp + 0x44]
mov esi, dword [edx]
mov eax, edx
mov eax, dword [eax + 4]
jmp 0x403b94
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 0x403bb4
mov esi, 0x8000
jmp 0x403bb9
inc edx
mov dword [esp + 0x18], edx
test edx, edx
jbe 0x403c4b
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 0x403d2b
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 0x403d4e
cmp esi, dword [esp + 0x24]
jne 0x403d71
mov eax, dword [esp + 0x34]
test eax, eax
je 0x403c19
mov ecx, dword [esp + 0x38]
push esi
push ebp
push ecx
call eax
test eax, eax
je 0x403d97
mov eax, dword [esp + 0x3c]
test eax, eax
je 0x403c32
mov edx, dword [esp + 0x40]
push esi
push ebp
push edx
call eax
test eax, eax
je 0x403da3
add edi, esi
adc ebx, 0
sub dword [esp + 0x18], 1
mov esi, 0x8000
jne 0x403bc1
mov ecx, dword [esp + 0x14]
mov eax, dword [esp + 0x20]
cmp eax, dword [esp + 0x30]
jae 0x403d08
mov esi, dword [ecx]
test esi, esi
je 0x403d1e
cmp dword [ecx + 8], 0
jne 0x403cb6
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 0x403d2b
mov ecx, ebp
mov edx, edi
call fcn.00403020
test eax, eax
je 0x403dfd
mov eax, dword [esp + 0x3c]
test eax, eax
je 0x403cb2
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 0x403daf
mov ecx, dword [esp + 0x14]
mov esi, dword [esp + 0x34]
test esi, esi
je 0x403cf8
cmp dword [ecx + 4], 0
je 0x403cf8
mov eax, dword [ecx]
cmp eax, 0x8000
ja 0x403dbb
push eax
push 0
push ebp
call fcn.0040d0d0
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 0x403de1
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 0x403b7f
mov eax, 1
pop edi
pop esi
pop ebp
pop ebx
add esp, 0x18
ret
push str.SetFilePointerEx__
push 0xf9
push str..QHImageHlp.c
xor edx, edx
call fcn.00406ae0
add esp, 0xc
xor eax, eax
pop edi
pop esi
pop ebp
pop ebx
add esp, 0x18
ret
push str.ReadFile__
push 0xfc
push str..QHImageHlp.c
xor edx, edx
call fcn.00406ae0
add esp, 0xc
xor eax, eax
pop edi
pop esi
pop ebp
pop ebx
add esp, 0x18
ret
push 0x41a82c
push 0xfe
mov edx, 1
push str..QHImageHlp.c
call fcn.00406c10
add esp, 0xc
xor eax, eax
pop edi
pop esi
pop ebp
pop ebx
add esp, 0x18
ret
push str._rT
push 0x374
jmp 0x403deb
push str._rT
push 0x379
jmp 0x403deb
push str._rT
push 0x38b
jmp 0x403deb
push 0x41a8fc
push 0x392
mov edx, 8
push str..QHImageHlp.c
call fcn.00406c10
add esp, 0xc
xor eax, eax
pop edi
pop esi
pop ebp
pop ebx
add esp, 0x18
ret
push str._rT
push 0x395
mov edx, 0x11
push str..QHImageHlp.c
call fcn.00406c10
add esp, 0xc
pop edi
pop esi
pop ebp
xor eax, eax
pop ebx
add esp, 0x18
ret