Function at 0x100126c0
Capabilities:
Get disk size
Get file size
Read file on windows

Disassembly:
push ebp
mov ebp, esp
sub esp, 0x15c
mov eax, dword [ebp + 0x20]
mov ecx, dword [ebp + 0x1c]
push ebx
push esi
push edi
push eax
push eax
call fcn.100171d0
push 0
push dword [ebp + 8]
lea ecx, [ebp - 0x5c]
mov byte [ebp - 0x14], 0
mov dword [ebp - 0x40], 0xffffffff
mov dword [ebp - 0x30], 0
mov dword [ebp - 0x2c], 0
mov dword [ebp - 0x18], 0
mov dword [ebp - 0x5c], 0x1005c1e0
mov dword [ebp - 0x54], 0
call fcn.10012490
mov eax, dword [ebp - 0x40]
mov esi, dword [ebp - 0x58]
mov ebx, dword [ebp + 0x24]
mov edi, dword [sym.imp.KERNEL32.dll_GetLastError]
mov dword [ebp - 0x10], 0
cmp eax, 0xffffffff
je 0x1001273c
push eax
call dword [sym.imp.KERNEL32.dll_CloseHandle]
test eax, eax
jne 0x1001273c
call edi
mov eax, ebx
mov dword [ebp - 0x28], 0
mov dword [ebp - 0x24], 0
mov dword [ebp - 0x20], 0
mov dword [ebp - 0x1c], 0
mov dword [ebp - 0x38], 0
mov dword [ebp - 0x34], 0
and eax, 0xffffffb3
je 0x1001278d
push eax
push str.unsupported_flags_0x_x_passed_to_CFileReader::BOpenFile
push 0x138c
push str.c:_buildslave_steam_rel_client_hotfix_win32_build_src_tier1_fileio.cpp
call fcn.100236e0
add esp, 0x10
test al, al
jne 0x1001278a
int3
and ebx, 0x4c
cmp byte [ebp - 0x14], 0
je 0x10012898
xor edi, edi
mov dword [ebp - 0x50], 0x1005c1e0
push edi
push esi
lea ecx, [ebp - 0x50]
mov dword [ebp - 0x48], edi
call fcn.10012490
push 0x3a
push dword [ebp - 0x4c]
call fcn.10032f40
add esp, 8
test eax, eax
je 0x10012816
mov ecx, dword [ebp - 0x4c]
mov edx, 0x100
sub eax, ecx
lea edi, [eax + 2]
mov eax, 0xff
cmp edi, eax
cmova edi, eax
cmp edi, edx
mov eax, edi
cmova eax, edx
push eax
push ecx
lea eax, [ebp - 0x15c]
push eax
call fcn.1002e710
add esp, 0xc
mov byte [ebp + edi - 0x15c], 0
lea eax, [ebp - 4]
push eax
lea eax, [ebp - 0x44]
push eax
lea eax, [ebp + 0x24]
push eax
lea eax, [ebp - 8]
push eax
lea eax, [ebp - 0x15c]
push eax
call dword [sym.imp.KERNEL32.dll_GetDiskFreeSpaceA]
xor edi, edi
jmp 0x1001282e
lea eax, [ebp - 4]
push eax
lea eax, [ebp - 0x44]
push eax
lea eax, [ebp + 0x24]
push eax
lea eax, [ebp - 8]
push eax
push 0
call dword [sym.imp.KERNEL32.dll_GetDiskFreeSpaceA]
test eax, eax
mov dword [ebp - 0x50], 0x1005c1e0
mov eax, dword [ebp - 0x48]
cmovne edi, dword [ebp + 0x24]
test eax, eax
je 0x10012852
push eax
call fcn.10031877
add esp, 4
mov dword [ebp - 0x48], 0
mov eax, dword [ebp - 0x4c]
test eax, eax
je 0x10012869
push eax
call fcn.10031877
add esp, 4
mov dword [ebp - 0x4c], 0
mov dword [ebp - 0x10], edi
test edi, edi
je 0x10012875
or ebx, 2
jmp 0x10012892
push esi
push str.Failed_to_get_sector_size_for_drive_file__s_is_on__not_using_unbuffered_IO
push 0x139b
push str.c:_buildslave_steam_rel_client_hotfix_win32_build_src_tier1_fileio.cpp
call fcn.100236e0
add esp, 0x10
test al, al
jne 0x10012892
int3
mov edi, dword [sym.imp.KERNEL32.dll_GetLastError]
lea eax, [ebp - 0x40]
test bl, 0x40
push eax
push ebx
mov ecx, 0
mov eax, 3
push 0
cmovne eax, ecx
push eax
push 1
push esi
call fcn.10011e30
add esp, 0x18
test eax, eax
jne 0x100128c9
cmp dword [ebp - 0x40], 0xffffffff
je 0x100128c9
xor bl, bl
jmp 0x100128cb
mov bl, 1
mov eax, dword [ebp - 0x54]
mov dword [ebp - 0x5c], 0x1005c1e0
test eax, eax
je 0x100128e9
push eax
call fcn.10031877
add esp, 4
mov dword [ebp - 0x54], 0
test esi, esi
je 0x100128fd
push esi
call fcn.10031877
add esp, 4
mov dword [ebp - 0x58], 0
test bl, bl
jne 0x10012dc3
lea eax, [ebp - 0x4c]
xor ebx, ebx
push eax
push dword [ebp - 0x40]
xor esi, esi
call dword [sym.imp.KERNEL32.dll_GetFileSizeEx]
test eax, eax
jne 0x10012925
call edi
test eax, eax
je 0x1001292b
mov dword [ebp - 0x48], ebx
jmp 0x1001292e
mov ebx, dword [ebp - 0x4c]
mov esi, dword [ebp - 0x48]
mov dword [ebp - 0x48], esi
mov edi, dword [ebp + 0x10]
test edi, edi
ja 0x10012dc3
mov esi, dword [ebp + 0xc]
jb 0x10012946
cmp esi, ebx
ja 0x10012dc3
mov eax, esi
or eax, edi
je 0x10012a12
cmp dword [ebp - 0x40], 0xffffffff
jne 0x10012965
push str.BIsOpen__
push 0x1455
jmp 0x10012db1
cmp byte [ebp - 0x14], 0
je 0x1001298f
mov eax, dword [ebp - 0x10]
test eax, eax
je 0x1001298f
push 0
push eax
push edi
push esi
call fcn.10032280
or eax, edx
je 0x1001298f
push str.Seeking_to_a_position_which_is_not_sector_aligned_will_break_unbuffered_io
push 0x145d
jmp 0x10012db1
cmp dword [ebp - 0x18], 0
je 0x100129cf
mov edx, dword [ebp - 0x24]
cmp edi, edx
jb 0x100129c1
mov eax, dword [ebp - 0x28]
ja 0x100129a5
cmp esi, eax
jb 0x100129c1
mov ecx, dword [ebp - 0x20]
add ecx, eax
mov eax, dword [ebp - 0x1c]
adc eax, edx
cmp edi, eax
ja 0x100129c1
jb 0x100129b9
cmp esi, ecx
jae 0x100129c1
mov dword [ebp - 0x38], esi
mov dword [ebp - 0x34], edi
jmp 0x10012a12
mov dword [ebp - 0x20], 0
mov dword [ebp - 0x1c], 0
push 0
lea eax, [ebp + 0x24]
mov dword [ebp + 0x24], edi
push eax
push esi
push dword [ebp - 0x40]
call dword [sym.imp.KERNEL32.dll_SetFilePointer]
mov dword [ebp - 4], eax
cmp eax, 0xffffffff
jne 0x10012a03
call dword [sym.imp.KERNEL32.dll_GetLastError]
test eax, eax
je 0x10012a03
call dword [sym.imp.KERNEL32.dll_GetLastError]
test eax, eax
je 0x10012a12
jmp 0x10012dc3
mov eax, dword [ebp + 0x24]
xor ecx, ecx
or ecx, dword [ebp - 4]
cdq
mov dword [ebp - 0x38], ecx
mov dword [ebp - 0x34], eax
mov eax, dword [ebp + 0x18]
sub ebx, esi
mov ecx, 0
sbb ecx, edi
cmp eax, ecx
ja 0x10012a2b
mov esi, dword [ebp + 0x14]
jb 0x10012a2f
cmp esi, ebx
jb 0x10012a2f
mov esi, ebx
mov eax, ecx
test eax, eax
ja 0x10012dc3
jb 0x10012da7
cmp esi, 0x7ffffffe
ja 0x10012dc3
test eax, eax
jne 0x10012da7
cmp esi, 0x40000000
ja 0x10012da7
mov edi, dword [ebp + 0x1c]
mov ecx, edi
call fcn.10011cd0
mov eax, dword [ebp + 0x20]
mov ecx, edi
movzx ebx, al
xor ebx, 1
add ebx, esi
push ebx
mov dword [ebp - 0x48], ebx
call fcn.100168c0
test ebx, ebx
je 0x10012da3
push ebx
mov ecx, edi
call fcn.10016720
test al, al
je 0x10012dc3
mov eax, dword [ebp + 0x1c]
mov edi, dword [edi + 0x14]
add edi, dword [eax + 4]
mov dword [ebp - 8], edi
je 0x10012dc3
cmp dword [ebp - 0x40], 0xffffffff
mov ebx, edi
jne 0x10012abe
push str.BIsOpen__
push 0x13d3
jmp 0x10012db1
mov ecx, closesocket
sub ecx, dword [ebp - 0x30]
mov dword [ebp - 4], ecx
cmp esi, ecx
jbe 0x10012b1f
xor edi, edi
test esi, esi
je 0x10012d6a
jmp 0x10012ae0
lea eax, [ebp + 0x24]
mov dword [ebp + 0x24], 0
push eax
cmp ecx, esi
mov eax, esi
cmovb eax, ecx
lea ecx, [ebp - 0x40]
push eax
push ebx
call fcn.10012f20
test al, al
je 0x10012dc3
mov eax, dword [ebp + 0x24]
test eax, eax
je 0x10012d6a
mov ecx, dword [ebp - 4]
add edi, eax
add ebx, eax
sub esi, eax
jne 0x10012ae0
jmp 0x10012d6a
cmp esi, 0x7fffffff
jb 0x10012b43
push str.cubBytesToRead___INT32_MAX
push 0x13f3
push str.c:_buildslave_steam_rel_client_hotfix_win32_build_src_tier1_fileio.cpp
call fcn.100236d0
add esp, 0xc
test al, al
jne 0x10012b43
int3
cmp byte [ebp - 0x14], 0
je 0x10012bcf
xor edx, edx
mov eax, esi
div dword [ebp - 0x10]
test edx, edx
je 0x10012b67
push str.CFileReader::Read_must_be_called_with_a_cubData_value_that_is_a_multiple_of_the_sector_size_when_using_unbuffered_IO
push 0x13fa
jmp 0x10012db1
cmp byte [0x10074f95], 0
jne 0x10012b9b
test edi, 0xfff
je 0x10012b9b
push str.Unbuffered_read_should_be_called_with_pvData_buffer_that_is_aligned_to_system_page_size__4kb_
push 0x13ff
push str.c:_buildslave_steam_rel_client_hotfix_win32_build_src_tier1_fileio.cpp
mov byte [0x10074f95], 1
call fcn.100236d0
add esp, 0xc
test al, al
jne 0x10012b9b
int3
cmp byte [0x10074f96], 0
jne 0x10012bcf
test esi, 0xfff
je 0x10012bcf
push str.Unbuffered_read_should_be_called_with_cubData_length_that_is_aligned_to_system_page_size__4kb_
push 0x1400
push str.c:_buildslave_steam_rel_client_hotfix_win32_build_src_tier1_fileio.cpp
mov byte [0x10074f96], 1
call fcn.100236d0
add esp, 0xc
test al, al
jne 0x10012bcf
int3
mov eax, dword [ebp - 0x18]
mov edx, esi
mov ebx, dword [ebp - 0x34]
xor edi, edi
mov ecx, dword [ebp - 0x38]
mov dword [ebp - 0x44], edx
test eax, eax
je 0x10012c67
cmp ebx, dword [ebp - 0x24]
jb 0x10012c67
mov eax, dword [ebp - 0x28]
ja 0x10012bf5
cmp ecx, eax
jb 0x10012c64
mov edx, dword [ebp - 0x20]
mov dword [ebp + 0x24], edx
mov edx, esi
add dword [ebp + 0x24], eax
mov eax, dword [ebp - 0x1c]
adc eax, dword [ebp - 0x24]
cmp ebx, eax
ja 0x10012c64
jb 0x10012c11
cmp ecx, dword [ebp + 0x24]
jae 0x10012c64
mov edx, dword [ebp - 0x20]
mov edi, dword [ebp - 0x1c]
sub edx, ecx
mov eax, dword [ebp - 0x28]
sbb edi, ebx
add edx, eax
adc edi, dword [ebp - 0x24]
xor ebx, ebx
cmp ebx, edi
ja 0x10012c33
jb 0x10012c2f
cmp esi, edx
jae 0x10012c33
mov edi, esi
jmp 0x10012c3a
mov edi, dword [ebp - 0x20]
sub edi, ecx
add edi, eax
sub ecx, eax
add ecx, dword [ebp - 0x18]
push edi
push ecx
push dword [ebp - 8]
call fcn.100337e0
mov ecx, dword [ebp - 0x38]
add esp, 0xc
mov ebx, dword [ebp - 0x34]
add ecx, edi
mov edx, esi
mov dword [ebp - 0x38], ecx
adc ebx, 0
sub edx, edi
mov dword [ebp - 0x34], ebx
mov dword [ebp - 0x44], edx
mov eax, dword [ebp - 0x18]
test edx, edx
jne 0x10012c72
mov edi, esi
jmp 0x10012d6a
mov dword [ebp + 0x24], edx
test eax, eax
je 0x10012c8b
cmp dword [ebp - 0x2c], 0
jb 0x10012c8b
ja 0x10012c86
cmp dword [ebp - 0x30], edx
jbe 0x10012c8b
mov edx, dword [ebp - 0x30]
jmp 0x10012c8e
mov edx, dword [ebp + 0x24]
mov eax, dword [ebp - 0x30]
or eax, dword [ebp - 0x2c]
je 0x10012d01
xor eax, eax
cmp edx, dword [ebp - 0x30]
jne 0x10012d01
cmp eax, dword [ebp - 0x2c]
jne 0x10012d01
push eax
mov dword [ebp - 4], eax
lea eax, [ebp - 4]
push eax
push edx
push dword [ebp - 0x18]
mov dword [ebp - 0x28], ecx
push dword [ebp - 0x40]
mov dword [ebp - 0x24], ebx
call dword [sym.imp.KERNEL32.dll_ReadFile]
test eax, eax
jne 0x10012cd5
call dword [sym.imp.KERNEL32.dll_GetLastError]
test eax, eax
sete byte [ebp + 0x27]
xor ebx, ebx
test eax, eax
jne 0x10012d45
jmp 0x10012cdc
mov ebx, dword [ebp - 4]
mov byte [ebp + 0x27], 1
mov eax, ebx
cdq
mov dword [ebp - 0x20], eax
mov eax, dword [ebp - 0x44]
cmp ebx, eax
mov dword [ebp - 0x1c], edx
cmovb eax, ebx
push eax
push dword [ebp - 0x18]
mov eax, dword [ebp - 8]
add eax, edi
push eax
call fcn.100337e0
add esp, 0xc
jmp 0x10012d45
push 0
lea eax, [ebp + 0x24]
mov dword [ebp + 0x24], 0
push eax
mov eax, dword [ebp - 8]
push edx
add eax, edi
push eax
push dword [ebp - 0x40]
call dword [sym.imp.KERNEL32.dll_ReadFile]
test eax, eax
jne 0x10012d2c
call dword [sym.imp.KERNEL32.dll_GetLastError]
xor ebx, ebx
jmp 0x10012d31
mov ebx, dword [ebp + 0x24]
xor eax, eax
test eax, eax
mov dword [ebp - 0x20], 0
mov dword [ebp - 0x1c], 0
sete byte [ebp + 0x27]
xor ecx, ecx
cmp byte [ebp + 0x27], cl
cmovne ecx, ebx
cmp dword [ebp - 0x44], ecx
mov eax, ecx
cmovb eax, dword [ebp - 0x44]
add dword [ebp - 0x38], eax
adc dword [ebp - 0x34], 0
add edi, ecx
cmp esi, edi
cmovb edi, esi
cmp byte [ebp + 0x27], 0
je 0x10012dc3
cmp byte [ebp + 0x20], 0
jne 0x10012d98
cmp edi, dword [ebp - 0x48]
jb 0x10012d91
push str.cbActual____uint32_nBufSizeWithTerminator
push 0x948
push str.c:_buildslave_steam_rel_client_hotfix_win32_build_src_tier1_fileio.cpp
call fcn.100236d0
add esp, 0xc
test al, al
jne 0x10012d91
int3
mov eax, dword [ebp - 8]
mov byte [eax + edi], 0
mov ecx, dword [ebp + 0x1c]
push edi
push 0
call fcn.100170e0
mov bl, 1
jmp 0x10012dc5
push str.cbToRead___1024__1024__1024
push 0x928
push str.c:_buildslave_steam_rel_client_hotfix_win32_build_src_tier1_fileio.cpp
call fcn.100236d0
add esp, 0xc
test al, al
jne 0x10012dc3
int3
xor bl, bl
mov eax, dword [ebp - 0x40]
mov dword [ebp - 0x10], 0
cmp eax, 0xffffffff
je 0x10012dec
push eax
call dword [sym.imp.KERNEL32.dll_CloseHandle]
test eax, eax
jne 0x10012de5
call dword [sym.imp.KERNEL32.dll_GetLastError]
mov dword [ebp - 0x40], 0xffffffff
mov eax, dword [ebp - 0x18]
mov dword [ebp - 0x38], 0
mov dword [ebp - 0x34], 0
mov dword [ebp - 0x28], 0
mov dword [ebp - 0x24], 0
mov dword [ebp - 0x20], 0
mov dword [ebp - 0x1c], 0
test eax, eax
je 0x10012e26
push eax
call fcn.10031877
add esp, 4
pop edi
pop esi
mov al, bl
pop ebx
mov esp, ebp
pop ebp
ret