Function at 0x100630c0
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.1006a670
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], vtable.CPathString.0
mov dword [ebp - 0x54], 0
call fcn.10062e80
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 0x1006313c
push eax
call dword [sym.imp.KERNEL32.dll_CloseHandle]
test eax, eax
jne 0x1006313c
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 0x1006318d
push eax
push str.unsupported_flags_0x_x_passed_to_CFileReader::BOpenFile
push 0x138c
push str.c:_buildslave_steam_rel_client_win32_build_src_tier1_fileio.cpp
call fcn.10078390
add esp, 0x10
test al, al
jne 0x1006318a
int3
and ebx, 0x4c
cmp byte [ebp - 0x14], 0
je 0x10063298
xor edi, edi
mov dword [ebp - 0x50], vtable.CPathString.0
push edi
push esi
lea ecx, [ebp - 0x50]
mov dword [ebp - 0x48], edi
call fcn.10062e80
push 0x3a
push dword [ebp - 0x4c]
call fcn.10102580
add esp, 8
test eax, eax
je 0x10063216
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.1006ead0
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 0x1006322e
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], vtable.CPathString.0
mov eax, dword [ebp - 0x48]
cmovne edi, dword [ebp + 0x24]
test eax, eax
je 0x10063252
push eax
call fcn.100ffe9d
add esp, 4
mov dword [ebp - 0x48], 0
mov eax, dword [ebp - 0x4c]
test eax, eax
je 0x10063269
push eax
call fcn.100ffe9d
add esp, 4
mov dword [ebp - 0x4c], 0
mov dword [ebp - 0x10], edi
test edi, edi
je 0x10063275
or ebx, 2
jmp 0x10063292
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_win32_build_src_tier1_fileio.cpp
call fcn.10078390
add esp, 0x10
test al, al
jne 0x10063292
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.10062820
add esp, 0x18
test eax, eax
jne 0x100632c9
cmp dword [ebp - 0x40], 0xffffffff
je 0x100632c9
xor bl, bl
jmp 0x100632cb
mov bl, 1
mov eax, dword [ebp - 0x54]
mov dword [ebp - 0x5c], vtable.CPathString.0
test eax, eax
je 0x100632e9
push eax
call fcn.100ffe9d
add esp, 4
mov dword [ebp - 0x54], 0
test esi, esi
je 0x100632fd
push esi
call fcn.100ffe9d
add esp, 4
mov dword [ebp - 0x58], 0
test bl, bl
jne 0x100637c3
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 0x10063325
call edi
test eax, eax
je 0x1006332b
mov dword [ebp - 0x48], ebx
jmp 0x1006332e
mov ebx, dword [ebp - 0x4c]
mov esi, dword [ebp - 0x48]
mov dword [ebp - 0x48], esi
mov edi, dword [ebp + 0x10]
test edi, edi
ja 0x100637c3
mov esi, dword [ebp + 0xc]
jb 0x10063346
cmp esi, ebx
ja 0x100637c3
mov eax, esi
or eax, edi
je 0x10063412
cmp dword [ebp - 0x40], 0xffffffff
jne 0x10063365
push str.BIsOpen__
push 0x1455
jmp 0x100637b1
cmp byte [ebp - 0x14], 0
je 0x1006338f
mov eax, dword [ebp - 0x10]
test eax, eax
je 0x1006338f
push 0
push eax
push edi
push esi
call fcn.101005e0
or eax, edx
je 0x1006338f
push str.Seeking_to_a_position_which_is_not_sector_aligned_will_break_unbuffered_io
push 0x145d
jmp 0x100637b1
cmp dword [ebp - 0x18], 0
je 0x100633cf
mov edx, dword [ebp - 0x24]
cmp edi, edx
jb 0x100633c1
mov eax, dword [ebp - 0x28]
ja 0x100633a5
cmp esi, eax
jb 0x100633c1
mov ecx, dword [ebp - 0x20]
add ecx, eax
mov eax, dword [ebp - 0x1c]
adc eax, edx
cmp edi, eax
ja 0x100633c1
jb 0x100633b9
cmp esi, ecx
jae 0x100633c1
mov dword [ebp - 0x38], esi
mov dword [ebp - 0x34], edi
jmp 0x10063412
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 0x10063403
call dword [sym.imp.KERNEL32.dll_GetLastError]
test eax, eax
je 0x10063403
call dword [sym.imp.KERNEL32.dll_GetLastError]
test eax, eax
je 0x10063412
jmp 0x100637c3
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 0x1006342b
mov esi, dword [ebp + 0x14]
jb 0x1006342f
cmp esi, ebx
jb 0x1006342f
mov esi, ebx
mov eax, ecx
test eax, eax
ja 0x100637c3
jb 0x100637a7
cmp esi, 0x7ffffffe
ja 0x100637c3
test eax, eax
jne 0x100637a7
cmp esi, 0x40000000
ja 0x100637a7
mov edi, dword [ebp + 0x1c]
mov ecx, edi
call fcn.10049860
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.10069100
test ebx, ebx
je 0x100637a3
push ebx
mov ecx, edi
call fcn.10068e70
test al, al
je 0x100637c3
mov eax, dword [ebp + 0x1c]
mov edi, dword [edi + 0x14]
add edi, dword [eax + 4]
mov dword [ebp - 8], edi
je 0x100637c3
cmp dword [ebp - 0x40], 0xffffffff
mov ebx, edi
jne 0x100634be
push str.BIsOpen__
push 0x13d3
jmp 0x100637b1
mov ecx, bind
sub ecx, dword [ebp - 0x30]
mov dword [ebp - 4], ecx
cmp esi, ecx
jbe 0x1006351f
xor edi, edi
test esi, esi
je 0x1006376a
jmp 0x100634e0
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.10063920
test al, al
je 0x100637c3
mov eax, dword [ebp + 0x24]
test eax, eax
je 0x1006376a
mov ecx, dword [ebp - 4]
add edi, eax
add ebx, eax
sub esi, eax
jne 0x100634e0
jmp 0x1006376a
cmp esi, 0x7fffffff
jb 0x10063543
push str.cubBytesToRead___INT32_MAX
push 0x13f3
push str.c:_buildslave_steam_rel_client_win32_build_src_tier1_fileio.cpp
call fcn.10078380
add esp, 0xc
test al, al
jne 0x10063543
int3
cmp byte [ebp - 0x14], 0
je 0x100635cf
xor edx, edx
mov eax, esi
div dword [ebp - 0x10]
test edx, edx
je 0x10063567
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 0x100637b1
cmp byte [0x10394edd], 0
jne 0x1006359b
test edi, 0xfff
je 0x1006359b
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_win32_build_src_tier1_fileio.cpp
mov byte [0x10394edd], 1
call fcn.10078380
add esp, 0xc
test al, al
jne 0x1006359b
int3
cmp byte [0x10394ede], 0
jne 0x100635cf
test esi, 0xfff
je 0x100635cf
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_win32_build_src_tier1_fileio.cpp
mov byte [0x10394ede], 1
call fcn.10078380
add esp, 0xc
test al, al
jne 0x100635cf
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 0x10063667
cmp ebx, dword [ebp - 0x24]
jb 0x10063667
mov eax, dword [ebp - 0x28]
ja 0x100635f5
cmp ecx, eax
jb 0x10063664
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 0x10063664
jb 0x10063611
cmp ecx, dword [ebp + 0x24]
jae 0x10063664
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 0x10063633
jb 0x1006362f
cmp esi, edx
jae 0x10063633
mov edi, esi
jmp 0x1006363a
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.10101520
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 0x10063672
mov edi, esi
jmp 0x1006376a
mov dword [ebp + 0x24], edx
test eax, eax
je 0x1006368b
cmp dword [ebp - 0x2c], 0
jb 0x1006368b
ja 0x10063686
cmp dword [ebp - 0x30], edx
jbe 0x1006368b
mov edx, dword [ebp - 0x30]
jmp 0x1006368e
mov edx, dword [ebp + 0x24]
mov eax, dword [ebp - 0x30]
or eax, dword [ebp - 0x2c]
je 0x10063701
xor eax, eax
cmp edx, dword [ebp - 0x30]
jne 0x10063701
cmp eax, dword [ebp - 0x2c]
jne 0x10063701
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 0x100636d5
call dword [sym.imp.KERNEL32.dll_GetLastError]
test eax, eax
sete byte [ebp + 0x27]
xor ebx, ebx
test eax, eax
jne 0x10063745
jmp 0x100636dc
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.10101520
add esp, 0xc
jmp 0x10063745
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 0x1006372c
call dword [sym.imp.KERNEL32.dll_GetLastError]
xor ebx, ebx
jmp 0x10063731
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 0x100637c3
cmp byte [ebp + 0x20], 0
jne 0x10063798
cmp edi, dword [ebp - 0x48]
jb 0x10063791
push str.cbActual____uint32_nBufSizeWithTerminator
push 0x948
push str.c:_buildslave_steam_rel_client_win32_build_src_tier1_fileio.cpp
call fcn.10078380
add esp, 0xc
test al, al
jne 0x10063791
int3
mov eax, dword [ebp - 8]
mov byte [eax + edi], 0
mov ecx, dword [ebp + 0x1c]
push edi
push 0
call fcn.1006a580
mov bl, 1
jmp 0x100637c5
push str.cbToRead___1024__1024__1024
push 0x928
push str.c:_buildslave_steam_rel_client_win32_build_src_tier1_fileio.cpp
call fcn.10078380
add esp, 0xc
test al, al
jne 0x100637c3
int3
xor bl, bl
mov eax, dword [ebp - 0x40]
mov dword [ebp - 0x10], 0
cmp eax, 0xffffffff
je 0x100637ec
push eax
call dword [sym.imp.KERNEL32.dll_CloseHandle]
test eax, eax
jne 0x100637e5
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 0x10063826
push eax
call fcn.100ffe9d
add esp, 4
pop edi
pop esi
mov al, bl
pop ebx
mov esp, ebp
pop ebp
ret