.486
.model flat, stdcall
option casemap:none   ; case sensitive

; ####################################################

include windows.inc
include user32.inc
include kernel32.inc
include comdlg32.inc
;include advapi32.inc
;include masm32.inc

includelib user32.lib
includelib kernel32.lib
includelib comdlg32.lib
;includelib advapi32.lib
;includelib masm32.lib
; ####################################################




.DATA
dddd db "03/12/2016 20:15:30", 0
eeee db "23/11/2015 21:05:32", 0
ffff db "03/12/2016 20:15:30", 0
fffg db "03/12/2016 20:15:31", 0
.CODE

;
; accepts two date strings in format "23/11/2016 20:15:30"
;
; returns -1 if first comes before second, 0 if equal, 1 if second comes before first
; just like sorting function for list items needs
;
CompareDate proc uses esi edi date1:DWORD, date2:DWORD
    mov esi, date1
    mov edi, date2

    mov cl, byte ptr [esi+6]
    cmp cl, byte ptr [edi+6]
    jb @exit1
    ja @exitm1
    mov cl, byte ptr [esi+7]
    cmp cl, byte ptr [edi+7]
    jb @exit1
    ja @exitm1
    mov cl, byte ptr [esi+8]
    cmp cl, byte ptr [edi+8]
    jb @exit1
    ja @exitm1
    mov cl, byte ptr [esi+9]
    cmp cl, byte ptr [edi+9]
    jb @exit1
    ja @exitm1
    mov cl, byte ptr [esi+3]
    cmp cl, byte ptr [edi+3]
    jb @exit1
    ja @exitm1
    mov cl, byte ptr [esi+4]
    cmp cl, byte ptr [edi+4]
    jb @exit1
    ja @exitm1
    mov cl, byte ptr [esi+0]
    cmp cl, byte ptr [edi+0]
    jb @exit1
    ja @exitm1
    mov cl, byte ptr [esi+1]
    cmp cl, byte ptr [edi+1]
    jb @exit1
    ja @exitm1
    mov cl, byte ptr [esi+0Bh]
    cmp cl, byte ptr [edi+0Bh]
    jb @exit1
    ja @exitm1
    mov cl, byte ptr [esi+0Ch]
    cmp cl, byte ptr [edi+0Ch]
    jb @exit1
    ja @exitm1
    mov cl, byte ptr [esi+0Eh]
    cmp cl, byte ptr [edi+0Eh]
    jb @exit1
    ja @exitm1
    mov cl, byte ptr [esi+0Fh]
    cmp cl, byte ptr [edi+0Fh]
    jb @exit1
    ja @exitm1
    mov cl, byte ptr [esi+11h]
    cmp cl, byte ptr [edi+11h]
    jb @exit1
    ja @exitm1
    mov cl, byte ptr [esi+12h]
    cmp cl, byte ptr [edi+12h]
    jb @exit1
    ja @exitm1

    mov eax, 0
    ret
@exitm1:
    mov eax, -1
    ret
@exit1:
    mov eax, 1
    ret
CompareDate endp

start:
    ; just a few tests
    invoke  CompareDate, offset dddd, offset eeee
    invoke  CompareDate, offset eeee, offset ffff
    invoke  CompareDate, offset dddd, offset ffff
    invoke  CompareDate, offset fffg, offset ffff
    invoke  ExitProcess, 0

end start