Function at 0x43def0
Capabilities:
Get file size
Read file on windows

Disassembly:
sub esp, 0x24
push ebx
push ebp
mov ebp, dword [esp + 0x38]
push esi
lea ebx, [eax + 0xccc]
mov eax, dword [eax]
push ebp
push eax
mov dword [esp + 0x24], ebx
mov dword [esp + 0x20], eax
call dword [sym.imp.KERNEL32.dll_GetFileSizeEx]
xor edx, edx
test eax, eax
jne 0x43df38
push str.GetFileSizeEx__
push 0x11e
push str..QHImageHlp.c
call fcn.00440ba0
add esp, 0xc
xor eax, eax
pop esi
pop ebp
pop ebx
add esp, 0x24
ret
mov esi, dword [esp + 0x34]
xor ecx, ecx
add esi, 8
mov dword [esp + 0x28], ecx
mov dword [esp + 0x2c], edx
mov dword [esp + 0xc], edx
mov dword [esp + 0x14], esi
mov eax, dword [esp + 0xc]
cmp eax, dword [esp + 0x38]
jne 0x43df65
mov eax, dword [ebp]
sub eax, ecx
mov ecx, dword [ebp + 4]
jmp 0x43df6d
mov eax, dword [esi - 8]
sub eax, ecx
mov ecx, dword [esi - 4]
sbb ecx, edx
mov edx, eax
shrd edx, ecx, 0xf
shr ecx, 0xf
and eax, 0x7fff
mov dword [esp + 0x10], edx
mov ebp, eax
jne 0x43df8c
mov ebp, 0x8000
jmp 0x43df91
inc edx
mov dword [esp + 0x10], edx
test edx, edx
jbe 0x43e041
mov ecx, dword [esp + 0x2c]
mov edx, dword [esp + 0x28]
mov eax, dword [esp + 0x18]
push 0
push 0
push ecx
push edx
push eax
call dword [sym.imp.KERNEL32.dll_SetFilePointerEx]
test eax, eax
je 0x43e0cc
mov edx, dword [esp + 0x18]
push 0
lea ecx, [esp + 0x24]
push ecx
push ebp
push ebx
push edx
call dword [sym.imp.KERNEL32.dll_ReadFile]
test eax, eax
je 0x43e0ee
cmp ebp, dword [esp + 0x20]
jne 0x43e110
mov eax, fcn.0043c6d0
test eax, eax
je 0x43e028
mov esi, dword [edi + 0x20]
and esi, 0x3f
mov eax, ebp
test ebp, ebp
jbe 0x43e020
mov cl, byte [ebx]
mov byte [edi + esi + 0x28], cl
inc esi
inc ebx
add dword [edi + 0x20], 1
adc dword [edi + 0x24], 0
dec eax
mov dword [esp + 0x24], eax
cmp esi, 0x40
jne 0x43e01c
mov edx, edi
xor esi, esi
call fcn.0043f7a0
mov eax, dword [esp + 0x24]
test eax, eax
ja 0x43dff5
mov esi, dword [esp + 0x14]
mov ebx, dword [esp + 0x1c]
add dword [esp + 0x28], ebp
mov ebp, 0x8000
adc dword [esp + 0x2c], 0
sub dword [esp + 0x10], 1
jne 0x43df99
mov edx, dword [esp + 0xc]
cmp edx, dword [esp + 0x38]
jae 0x43e0a1
mov eax, dword [esi]
test eax, eax
je 0x43e17f
mov ecx, fcn.0043c6d0
test ecx, ecx
je 0x43e08d
cmp dword [esi + 4], 0
je 0x43e08d
cmp eax, 0x8000
ja 0x43e135
push eax
push 0
push ebx
call fcn.00458270
mov edx, dword [esi]
add esp, 0xc
push edx
push ebx
push edi
call fcn.0043c6d0
test eax, eax
je 0x43e15a
mov eax, dword [esi]
xor ecx, ecx
add eax, dword [esi - 8]
mov dword [esp + 0x28], eax
mov eax, dword [esi - 4]
adc eax, ecx
mov dword [esp + 0x2c], eax
mov eax, dword [esp + 0xc]
inc eax
add esi, 0x18
mov dword [esp + 0xc], eax
mov dword [esp + 0x14], esi
cmp eax, dword [esp + 0x38]
ja 0x43e17f
mov ebp, dword [esp + 0x3c]
mov edx, dword [esp + 0x2c]
mov ecx, dword [esp + 0x28]
jmp 0x43df51
push str.SetFilePointerEx__
push 0xf9
push str..QHImageHlp.c
xor edx, edx
call fcn.00440ba0
add esp, 0xc
xor eax, eax
pop esi
pop ebp
pop ebx
add esp, 0x24
ret
push str.ReadFile__
push 0xfc
push str..QHImageHlp.c
xor edx, edx
call fcn.00440ba0
add esp, 0xc
xor eax, eax
pop esi
pop ebp
pop ebx
add esp, 0x24
ret
push 0x49b9e0
push 0xfe
mov edx, 1
push str..QHImageHlp.c
call fcn.00440cd0
add esp, 0xc
xor eax, eax
pop esi
pop ebp
pop ebx
add esp, 0x24
ret
push 0x49bab0
push 0x3d8
mov edx, 8
push str..QHImageHlp.c
call fcn.00440cd0
add esp, 0xc
xor eax, eax
pop esi
pop ebp
pop ebx
add esp, 0x24
ret
push str._rT
push 0x3db
mov edx, 0x11
push str..QHImageHlp.c
call fcn.00440cd0
add esp, 0xc
xor eax, eax
pop esi
pop ebp
pop ebx
add esp, 0x24
ret
pop esi
pop ebp
mov eax, 1
pop ebx
add esp, 0x24
ret