Function at 0x410680
Capabilities:
Read file on windows

Disassembly:
push ebp
lea ebp, [esp - 0xcc]
sub esp, 0xcc
push 0xffffffffffffffff
push 0x4441b8
mov eax, dword fs:[0]
push eax
sub esp, 0x40
mov eax, dword [0x4629b4]
xor eax, ebp
mov dword [ebp + 0xc8], eax
push ebx
push esi
push edi
push eax
lea eax, [ebp - 0xc]
mov dword fs:[0], eax
lea eax, [ebp]
mov dword [ebp], 0
push eax
call fcn.0040fd90
push 0x453f34
lea eax, [ebp + 4]
push 0x46bcd0
push eax
call fcn.00435872
add esp, 0x10
test eax, eax
je 0x4106ea
xor eax, eax
jmp 0x4111b6
push 2
push 0
push dword [ebp + 4]
call fcn.00435f66
push dword [ebp + 4]
call fcn.004364d8
push 0
push 0
push dword [ebp + 4]
mov edi, eax
call fcn.00435f66
xor ebx, ebx
lea eax, [edi + 2]
mov ecx, 2
mul ecx
seto bl
neg ebx
or ebx, eax
push ebx
call fcn.0042daff
mov esi, eax
add esp, 0x20
test esi, esi
je 0x41073c
push ebx
push 0
push esi
call fcn.0042f620
add esp, 0xc
jmp 0x41073e
xor esi, esi
push dword [ebp + 4]
push edi
push 2
push esi
call fcn.00435b7b
add esp, 0x10
lea ecx, [ebp + 0x68]
push esi
call fcn.00405090
push dword [ebp + 4]
mov dword [ebp - 4], 0
call fcn.0043592f
push esi
call fcn.0042db08
lea eax, [ebp]
push eax
call fcn.0040fd90
add esp, 0xc
lea ecx, [ebp + 0x68]
push 0
push str._resources_
call fcn.0040bce0
push 0
push str.__resources_
lea ecx, [ebp + 0x68]
mov edi, eax
call fcn.0040bce0
mov esi, eax
lea eax, [ebp + 0x38]
mov ecx, esi
sub ecx, edi
sub ecx, 0xb
push ecx
lea ecx, [edi + 0xb]
push ecx
push eax
lea ecx, [ebp + 0x68]
call fcn.0040c590
push eax
lea ecx, [ebp + 0x68]
call fcn.004050f0
lea ecx, [ebp + 0x38]
call fcn.004050d0
cmp esi, edi
jbe 0x410f04
test edi, edi
je 0x410f04
lea ecx, [ebp + 8]
call fcn.004050b0
push 0
push str._colours_
lea ecx, [ebp + 0x68]
mov byte [ebp - 4], 1
call fcn.0040bce0
push 0
push str.__colours_
lea ecx, [ebp + 0x68]
mov esi, eax
call fcn.0040bce0
cmp eax, esi
jbe 0x410efc
cmp esi, 0xffffffff
je 0x410efc
sub eax, esi
lea ecx, [ebp + 0x68]
sub eax, 9
push eax
lea eax, [esi + 9]
push eax
lea eax, [ebp + 0x38]
push eax
call fcn.0040c590
push eax
lea ecx, [ebp + 8]
call fcn.004050f0
lea ecx, [ebp + 0x38]
call fcn.004050d0
push 0xc
lea ecx, [ebp + 0xbc]
call fcn.0040ba70
lea ecx, [ebp + 0xbc]
call fcn.0040d9a0
push 0x4610a0
lea ecx, [ebp + 0x8c]
mov byte [ebp - 4], 2
call fcn.00405090
lea eax, [ebp + 0x8c]
mov byte [ebp - 4], 3
push eax
lea eax, [ebp + 0xbc]
push eax
lea eax, [ebp + 8]
push eax
call fcn.0040b220
add esp, 0xc
mov byte [ebp - 4], 2
lea ecx, [ebp + 0x8c]
call fcn.004050d0
xor ebx, ebx
lea ecx, [ebp + 0xbc]
mov dword [ebp - 0x14], ebx
call fcn.0040c280
test eax, eax
je 0x410ed3
mov edi, 0xf5f5f8
nop dword [eax]
push ebx
lea ecx, [ebp + 0xbc]
call fcn.0040df90
push 0
push str._color_
mov ecx, eax
call fcn.0040bce0
mov esi, eax
lea ecx, [ebp + 0xbc]
push ebx
mov dword [ebp - 0x18], esi
call fcn.0040df90
push 0
push str.__color_
mov ecx, eax
call fcn.0040bce0
mov dword [ebp - 0x28], eax
cmp eax, esi
jbe 0x410ebc
cmp esi, 0xffffffff
je 0x410ebc
push ebx
lea ecx, [ebp + 0xbc]
mov dword [ebp - 0x10], 0xffff
call fcn.0040df90
push 0x15
mov ecx, 0x46b8a4
mov esi, eax
call fcn.0040df90
push 0
push eax
mov ecx, esi
call fcn.0040bca0
cmp eax, 0xffffffff
mov dword [ebp - 0x24], 1
mov esi, edi
mov ecx, 0xffff
cmove esi, ecx
mov eax, 0xf5f5f8
mov ecx, 1
mov dword [ebp - 0x1c], esi
mov dword [ebp - 0x20], ecx
mov edi, 0xff80
push ebx
lea ecx, [ebp + 0xbc]
cmove edi, eax
call fcn.0040df90
mov ecx, dword [ebp - 0x18]
mov edx, dword [ebp - 0x28]
sub edx, ecx
add ecx, 7
sub edx, 7
push edx
push ecx
lea ecx, [ebp + 0x38]
push ecx
mov ecx, eax
call fcn.0040c590
push 0xc
lea ecx, [ebp + 0x80]
call fcn.0040ba70
lea ecx, [ebp + 0x80]
call fcn.0040d9a0
push 0x453fa4
lea ecx, [ebp + 0x8c]
mov byte [ebp - 4], 5
call fcn.00405090
lea eax, [ebp + 0x8c]
mov byte [ebp - 4], 6
push eax
lea eax, [ebp + 0x80]
push eax
lea eax, [ebp + 0x38]
push eax
call fcn.0040b220
add esp, 0xc
mov byte [ebp - 4], 5
lea ecx, [ebp + 0x8c]
call fcn.004050d0
lea ecx, [ebp + 0x80]
mov ebx, 1
call fcn.0040c280
cmp eax, ebx
jbe 0x410ae2
mov dword [ebp - 0x18], edi
mov dword [ebp - 0x1c], esi
push 1
push 0x46109c
push ebx
lea ecx, [ebp + 0x80]
call fcn.0040df90
push eax
lea eax, [ebp + 0x8c]
push eax
call fcn.0040c410
add esp, 0x10
push 0x4464a0
lea ecx, [ebp + 0xa4]
mov byte [ebp - 4], 7
call fcn.00405090
lea ecx, [ebp + 0x8c]
mov byte [ebp - 4], 8
xor esi, esi
call fcn.00406800
test eax, eax
je 0x410a8f
nop
push esi
lea ecx, [ebp + 0x8c]
call fcn.0040af80
cmp word [eax], 0x22
je 0x410a7f
push esi
lea ecx, [ebp + 0x8c]
call fcn.0040af80
cmp word [eax], 0x23
je 0x410a7f
push esi
lea ecx, [ebp + 0x8c]
call fcn.0040af80
lea ecx, [ebp + 0xa4]
movzx eax, word [eax]
push eax
call fcn.0040e090
lea ecx, [ebp + 0x8c]
inc esi
call fcn.00406800
cmp esi, eax
jb 0x410a40
cmp ebx, 2
jne 0x4111d9
push 0
lea ecx, [ebp + 0xa4]
call fcn.0040af80
xor ecx, ecx
cmp word [eax], 0x30
setne cl
mov dword [ebp - 0x20], ecx
mov edi, dword [ebp - 0x18]
lea ecx, [ebp + 0xa4]
call fcn.004050d0
lea ecx, [ebp + 0x8c]
mov byte [ebp - 4], 5
call fcn.004050d0
lea ecx, [ebp + 0x80]
inc ebx
call fcn.0040c280
cmp ebx, eax
jb 0x4109f2
push dword [ebp - 0x14]
lea ecx, [ebp + 0xbc]
call fcn.0040df90
push 8
mov ecx, 0x46b8a4
mov esi, eax
call fcn.0040df90
push 0
push eax
mov ecx, esi
call fcn.0040bca0
mov ebx, dword [ebp - 0x20]
cmp eax, 0xffffffff
je 0x410b24
mov eax, dword [ebp - 0x10]
mov dword [0x461028], eax
mov dword [0x461060], edi
mov dword [0x461114], ebx
push dword [ebp - 0x14]
lea ecx, [ebp + 0xbc]
call fcn.0040df90
push 9
mov ecx, 0x46b8a4
mov esi, eax
call fcn.0040df90
push 0
push eax
mov ecx, esi
call fcn.0040bca0
cmp eax, 0xffffffff
je 0x410b63
mov eax, dword [ebp - 0x10]
mov dword [0x46102c], eax
mov dword [0x461064], edi
mov dword [0x461118], ebx
push dword [ebp - 0x14]
lea ecx, [ebp + 0xbc]
call fcn.0040df90
push 0xa
mov ecx, 0x46b8a4
mov esi, eax
call fcn.0040df90
push 0
push eax
mov ecx, esi
call fcn.0040bca0
cmp eax, 0xffffffff
je 0x410ba2
mov eax, dword [ebp - 0x10]
mov dword [0x461030], eax
mov dword [0x461068], edi
mov dword [0x46111c], ebx
push dword [ebp - 0x14]
lea ecx, [ebp + 0xbc]
call fcn.0040df90
push 0xb
mov ecx, 0x46b8a4
mov esi, eax
call fcn.0040df90
push 0
push eax
mov ecx, esi
call fcn.0040bca0
cmp eax, 0xffffffff
je 0x410be1
mov eax, dword [ebp - 0x10]
mov dword [0x461034], eax
mov dword [0x46106c], edi
mov dword [0x461120], ebx
push dword [ebp - 0x14]
lea ecx, [ebp + 0xbc]
call fcn.0040df90
push 0xc
mov ecx, 0x46b8a4
mov esi, eax
call fcn.0040df90
push 0
push eax
mov ecx, esi
call fcn.0040bca0
cmp eax, 0xffffffff
je 0x410c28
mov eax, dword [ebp - 0x10]
mov dword [0x461038], eax
mov eax, dword [ebp - 0x24]
mov dword [0x461070], edi
mov dword [0x461124], ebx
mov dword [0x461164], eax
push dword [ebp - 0x14]
lea ecx, [ebp + 0xbc]
call fcn.0040df90
push 0xd
mov ecx, 0x46b8a4
mov esi, eax
call fcn.0040df90
push 0
push eax
mov ecx, esi
call fcn.0040bca0
cmp eax, 0xffffffff
je 0x410c67
mov eax, dword [ebp - 0x10]
mov dword [0x46103c], eax
mov dword [0x461074], edi
mov dword [0x461128], ebx
push dword [ebp - 0x14]
lea ecx, [ebp + 0xbc]
call fcn.0040df90
push 0xe
mov ecx, 0x46b8a4
mov esi, eax
call fcn.0040df90
push 0
push eax
mov ecx, esi
call fcn.0040bca0
cmp eax, 0xffffffff
je 0x410ca6
mov eax, dword [ebp - 0x10]
mov dword [0x461040], eax
mov dword [0x461078], edi
mov dword [0x46112c], ebx
push dword [ebp - 0x14]
lea ecx, [ebp + 0xbc]
call fcn.0040df90
push 0xf
mov ecx, 0x46b8a4
mov esi, eax
call fcn.0040df90
push 0
push eax
mov ecx, esi
call fcn.0040bca0
cmp eax, 0xffffffff
je 0x410ced
mov eax, dword [ebp - 0x10]
mov dword [0x461044], eax
mov eax, dword [ebp - 0x1c]
mov dword [0x46107c], edi
mov dword [0x46114c], eax
mov dword [0x461130], ebx
push dword [ebp - 0x14]
lea ecx, [ebp + 0xbc]
call fcn.0040df90
push 0x51
mov ecx, 0x46b8a4
mov esi, eax
call fcn.0040df90
push 0
push eax
mov ecx, esi
call fcn.0040bca0
cmp eax, 0xffffffff
je 0x410d34
mov eax, dword [ebp - 0x10]
mov dword [0x461048], eax
mov eax, dword [ebp - 0x1c]
mov dword [0x461080], edi
mov dword [0x461150], eax
mov dword [0x461134], ebx
push dword [ebp - 0x14]
lea ecx, [ebp + 0xbc]
call fcn.0040df90
push 0x11
mov ecx, 0x46b8a4
mov esi, eax
call fcn.0040df90
push 0
push eax
mov ecx, esi
call fcn.0040bca0
cmp eax, 0xffffffff
je 0x410d7b
mov eax, dword [ebp - 0x10]
mov dword [0x46104c], eax
mov eax, dword [ebp - 0x1c]
mov dword [0x461084], edi
mov dword [0x461154], eax
mov dword [0x461138], ebx
push dword [ebp - 0x14]
lea ecx, [ebp + 0xbc]
call fcn.0040df90
push 0x12
mov ecx, 0x46b8a4
mov esi, eax
call fcn.0040df90
push 0
push eax
mov ecx, esi
call fcn.0040bca0
cmp eax, 0xffffffff
je 0x410dba
mov eax, dword [ebp - 0x10]
mov dword [0x461050], eax
mov dword [0x461088], edi
mov dword [0x46113c], ebx
push dword [ebp - 0x14]
lea ecx, [ebp + 0xbc]
call fcn.0040df90
push 0x13
mov ecx, 0x46b8a4
mov esi, eax
call fcn.0040df90
push 0
push eax
mov ecx, esi
call fcn.0040bca0
cmp eax, 0xffffffff
je 0x410df9
mov eax, dword [ebp - 0x10]
mov dword [0x461054], eax
mov dword [0x46108c], edi
mov dword [0x461140], ebx
push dword [ebp - 0x14]
lea ecx, [ebp + 0xbc]
call fcn.0040df90
push 0x14
mov ecx, 0x46b8a4
mov esi, eax
call fcn.0040df90
push 0
push eax
mov ecx, esi
call fcn.0040bca0
cmp eax, 0xffffffff
je 0x410e38
mov eax, dword [ebp - 0x10]
mov dword [0x461058], eax
mov dword [0x461090], edi
mov dword [0x461144], ebx
push dword [ebp - 0x14]
lea ecx, [ebp + 0xbc]
call fcn.0040df90
push 0x15
mov ecx, 0x46b8a4
mov esi, eax
call fcn.0040df90
push 0
push eax
mov ecx, esi
call fcn.0040bca0
cmp eax, 0xffffffff
je 0x410e7f
mov eax, dword [ebp - 0x10]
mov dword [0x46105c], eax
mov eax, dword [ebp - 0x1c]
mov dword [0x461094], edi
mov dword [0x461158], eax
mov dword [0x461148], ebx
lea ecx, [ebp - 0x34]
call fcn.0040d9a0
lea ecx, [ebp + 0x80]
push ecx
mov ecx, eax
call fcn.0042bf00
lea ecx, [ebp - 0x34]
call fcn.0040de10
lea ecx, [ebp + 0x80]
call fcn.0040de10
lea ecx, [ebp + 0x38]
mov byte [ebp - 4], 2
call fcn.004050d0
mov ebx, dword [ebp - 0x14]
mov edi, 0xf5f5f8
inc ebx
lea ecx, [ebp + 0xbc]
mov dword [ebp - 0x14], ebx
call fcn.0040c280
cmp ebx, eax
jb 0x4108b0
lea ecx, [ebp - 0x34]
call fcn.0040d9a0
lea ecx, [ebp + 0xbc]
push ecx
mov ecx, eax
call fcn.0042bf00
lea ecx, [ebp - 0x34]
call fcn.0040de10
lea ecx, [ebp + 0xbc]
call fcn.0040de10
lea ecx, [ebp + 8]
call fcn.004050d0
push 0
push 0x453fa8
lea ecx, [ebp + 0x68]
call fcn.0040bce0
push 0
push str.__position_
lea ecx, [ebp + 0x68]
mov edi, eax
call fcn.0040bce0
lea ecx, [ebp + 0x50]
mov esi, eax
call fcn.004050b0
mov byte [ebp - 4], 0xb
cmp esi, edi
jbe 0x410fd1
cmp edi, 0xffffffff
je 0x410fd1
sub esi, edi
lea eax, [edi + 0xa]
sub esi, 0xa
lea ecx, [ebp + 0x68]
push esi
push eax
lea eax, [ebp + 0x38]
push eax
call fcn.0040c590
push eax
lea ecx, [ebp + 0x50]
call fcn.004050f0
lea ecx, [ebp + 0x38]
call fcn.004050d0
lea eax, [ebp - 0x10]
mov dword [ebp - 0x10], 1
push eax
push str.__top_
lea eax, [ebp + 0x50]
push str._top_
push eax
call fcn.004102a0
mov eax, dword [ebp - 0x10]
test eax, eax
mov ecx, dword [0x461160]
cmovns ecx, eax
mov dword [ebp - 0x10], 0
lea eax, [ebp - 0x10]
mov dword [0x461160], ecx
push eax
push str.__left_
lea eax, [ebp + 0x50]
push str._left_
push eax
call fcn.004102a0
mov eax, dword [ebp - 0x10]
add esp, 0x20
mov ecx, dword [0x46c76c]
test eax, eax
cmovns ecx, eax
mov dword [0x46c76c], ecx
push 0
push str._Fonts_
lea ecx, [ebp + 0x68]
call fcn.0040bce0
push 0
push str.__Fonts_
lea ecx, [ebp + 0x68]
mov esi, eax
call fcn.0040bce0
cmp eax, esi
jbe 0x4111a1
cmp esi, 0xffffffff
je 0x4111a1
sub eax, esi
lea ecx, [ebp + 0x68]
sub eax, 7
push eax
lea eax, [esi + 7]
push eax
lea eax, [ebp + 0x38]
push eax
call fcn.0040c590
push eax
lea ecx, [ebp + 0x50]
call fcn.004050f0
lea ecx, [ebp + 0x38]
call fcn.004050d0
push 0
push str._name_
lea ecx, [ebp + 0x50]
call fcn.0040bce0
push 0
push str.__name_
lea ecx, [ebp + 0x50]
mov edi, eax
call fcn.0040bce0
lea ecx, [ebp + 0x8c]
mov esi, eax
call fcn.004050b0
mov byte [ebp - 4], 0xc
cmp esi, edi
jbe 0x41112c
cmp edi, 0xffffffff
je 0x41112c
sub esi, edi
lea eax, [edi + 6]
sub esi, 6
lea ecx, [ebp + 0x50]
push esi
push eax
lea eax, [ebp + 0xa4]
push eax
call fcn.0040c590
lea ecx, [ebp + 0xa4]
mov byte [ebp - 4], 0xd
xor esi, esi
call fcn.00406800
test eax, eax
je 0x411102
nop dword [eax]
push esi
lea ecx, [ebp + 0xa4]
call fcn.0040af80
cmp word [eax], 0x22
je 0x4110f2
push 0
lea ecx, [ebp + 0x8c]
call fcn.0040af80
push esi
lea ecx, [ebp + 0xa4]
cmp word [eax], 0
jne 0x4110de
call fcn.0040af80
cmp word [eax], 0x40
je 0x4110f2
push esi
lea ecx, [ebp + 0xa4]
call fcn.0040af80
lea ecx, [ebp + 0x8c]
movzx eax, word [eax]
push eax
call fcn.0040e090
lea ecx, [ebp + 0xa4]
inc esi
call fcn.00406800
cmp esi, eax
jb 0x4110a0
push 0xffffffffffffffff
lea ecx, [ebp + 0x8c]
call fcn.00409580
push eax
push 0x4610b8
call fcn.0040d8a0
add esp, 0xc
mov byte [ebp - 4], 0xc
lea ecx, [ebp + 0xa4]
call fcn.004050d0
lea eax, [ebp - 0x10]
mov dword [ebp - 0x10], 8
push eax
push str.__size_
lea eax, [ebp + 0x50]
push str._size_
push eax
call fcn.004102a0
cmp dword [ebp - 0x10], 7
lea eax, [ebp - 0x10]
mov ecx, dword [0x4610fc]
cmovg ecx, dword [ebp - 0x10]
push eax
push str.__Type_
lea eax, [ebp + 0x50]
mov dword [0x4610fc], ecx
push str._Type_
push eax
mov dword [ebp - 0x10], 0x190
call fcn.004102a0
mov ecx, dword [0x4610b4]
add esp, 0x20
cmp dword [ebp - 0x10], 0x3e8
cmovle ecx, dword [ebp - 0x10]
mov dword [0x4610b4], ecx
lea ecx, [ebp + 0x8c]
call fcn.004050d0
lea ecx, [ebp + 0x50]
call fcn.004050d0
lea ecx, [ebp + 0x68]
call fcn.004050d0
mov eax, 1
mov ecx, dword [ebp - 0xc]
mov dword fs:[0], ecx
pop ecx
pop edi
pop esi
pop ebx
mov ecx, dword [ebp + 0xc8]
xor ecx, ebp
call fcn.0042d960
lea esp, [ebp + 0xcc]
pop ebp
ret
cmp ebx, 3
je 0x4111ec
cmp ebx, 4
je 0x4111ec
cmp ebx, 5
jne 0x410ab1
push 0x4464a0
lea ecx, [ebp + 0x20]
call fcn.00405090
lea ecx, [ebp + 0xa4]
mov byte [ebp - 4], 9
xor edi, edi
xor esi, esi
call fcn.00406800
test eax, eax
je 0x4112f5
push esi
lea ecx, [ebp + 0xa4]
call fcn.0040af80
cmp word [eax], 0x2f
jbe 0x41125b
push esi
lea ecx, [ebp + 0xa4]
call fcn.0040af80
cmp word [eax], 0x3a
jae 0x41125b
push esi
lea ecx, [ebp + 0xa4]
call fcn.0040af80
lea ecx, [ebp + 0x20]
movzx eax, word [eax]
push eax
call fcn.0040e090
inc edi
cmp di, 6
je 0x4112f5
push esi
lea ecx, [ebp + 0xa4]
call fcn.0040af80
cmp word [eax], 0x40
jbe 0x41129e
push esi
lea ecx, [ebp + 0xa4]
call fcn.0040af80
cmp word [eax], 0x47
jae 0x41129e
push esi
lea ecx, [ebp + 0xa4]
call fcn.0040af80
lea ecx, [ebp + 0x20]
movzx eax, word [eax]
push eax
call fcn.0040e090
inc edi
cmp di, 6
je 0x4112f5
push esi
lea ecx, [ebp + 0xa4]
call fcn.0040af80
cmp word [eax], 0x60
jbe 0x4112e1
push esi
lea ecx, [ebp + 0xa4]
call fcn.0040af80
cmp word [eax], 0x67
jae 0x4112e1
push esi
lea ecx, [ebp + 0xa4]
call fcn.0040af80
lea ecx, [ebp + 0x20]
movzx eax, word [eax]
push eax
call fcn.0040e090
inc edi
cmp di, 6
je 0x4112f5
lea ecx, [ebp + 0xa4]
inc esi
call fcn.00406800
cmp esi, eax
jb 0x411214
push 0
lea ecx, [ebp + 0x20]
call fcn.0040af80
cmp word [eax], 0
je 0x4113a2
lea ecx, [ebp + 0x20]
call fcn.00409580
push eax
lea ecx, [ebp - 0x4c]
call fcn.00405090
push 0x10
lea eax, [ebp - 0x4c]
mov byte [ebp - 4], 0xa
push 0
push eax
call fcn.0042bde0
add esp, 0xc
lea ecx, [ebp - 0x4c]
mov edi, eax
call fcn.004050d0
cmp ebx, 3
jne 0x411350
mov dword [ebp - 0x10], edi
lea ecx, [ebp + 0x20]
mov edi, dword [ebp - 0x18]
call fcn.004050d0
jmp 0x410ab4
cmp ebx, 4
jne 0x411365
lea ecx, [ebp + 0x20]
mov dword [ebp - 0x18], edi
call fcn.004050d0
jmp 0x410ab4
cmp ebx, 5
jne 0x4113a2
push dword [ebp - 0x14]
lea ecx, [ebp + 0xbc]
mov dword [ebp - 0x1c], edi
call fcn.0040df90
push 0xc
mov ecx, 0x46b8a4
mov esi, eax
call fcn.0040df90
push 0
push eax
mov ecx, esi
call fcn.0040bca0
cmp eax, 0xffffffff
je 0x4113a2
xor eax, eax
test edi, edi
setne al
mov dword [ebp - 0x24], eax
mov edi, dword [ebp - 0x18]
lea ecx, [ebp + 0x20]
call fcn.004050d0
jmp 0x410ab4