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| | 1:
2: using namespace std;
3:
4: bool cmpstringz0rs(char * s1, char * s2, int lens1, int lens2)
5: {
00401150 55 push ebp
00401151 8B EC mov ebp,esp
00401153 83 EC 44 sub esp,44h
00401156 53 push ebx
00401157 56 push esi
00401158 57 push edi
00401159 8D 7D BC lea edi,[ebp-44h]
0040115C B9 11 00 00 00 mov ecx,11h
00401161 B8 CC CC CC CC mov eax,0CCCCCCCCh
00401166 F3 AB rep stos dword ptr [edi]
6: if (lens1 != lens2) return false;
00401168 8B 45 10 mov eax,dword ptr [ebp+10h]
0040116B 3B 45 14 cmp eax,dword ptr [ebp+14h]
0040116E 74 04 je cmpstringz0rs+24h (00401174)
00401170 32 C0 xor al,al
00401172 EB 44 jmp cmpstringz0rs+68h (004011b8)
7: for (int i=0; i<lens1; i++)
00401174 C7 45 FC 00 00 00 00 mov dword ptr [ebp-4],0
0040117B EB 09 jmp cmpstringz0rs+36h (00401186)
0040117D 8B 4D FC mov ecx,dword ptr [ebp-4]
00401180 83 C1 01 add ecx,1
00401183 89 4D FC mov dword ptr [ebp-4],ecx
00401186 8B 55 FC mov edx,dword ptr [ebp-4]
00401189 3B 55 10 cmp edx,dword ptr [ebp+10h]
0040118C 7D 28 jge cmpstringz0rs+66h (004011b6)
8: {
9: if ((*s1++)!=(*s2++)) return false;
0040118E 8B 45 08 mov eax,dword ptr [ebp+8]
00401191 0F BE 08 movsx ecx,byte ptr [eax]
00401194 8B 55 0C mov edx,dword ptr [ebp+0Ch]
00401197 0F BE 02 movsx eax,byte ptr [edx]
0040119A 8B 55 0C mov edx,dword ptr [ebp+0Ch]
0040119D 83 C2 01 add edx,1
004011A0 89 55 0C mov dword ptr [ebp+0Ch],edx
004011A3 8B 55 08 mov edx,dword ptr [ebp+8]
004011A6 83 C2 01 add edx,1
004011A9 89 55 08 mov dword ptr [ebp+8],edx
004011AC 3B C8 cmp ecx,eax
004011AE 74 04 je cmpstringz0rs+64h (004011b4)
004011B0 32 C0 xor al,al
004011B2 EB 04 jmp cmpstringz0rs+68h (004011b8)
10: }
004011B4 EB C7 jmp cmpstringz0rs+2Dh (0040117d)
11: return true;
004011B6 B0 01 mov al,1
12: }
004011B8 5F pop edi
004011B9 5E pop esi
004011BA 5B pop ebx
004011BB 8B E5 mov esp,ebp
004011BD 5D pop ebp
004011BE C3 ret
14: void main (void)
15: {
004011E0 55 push ebp
004011E1 8B EC mov ebp,esp
004011E3 83 EC 5C sub esp,5Ch
004011E6 53 push ebx
004011E7 56 push esi
004011E8 57 push edi
004011E9 8D 7D A4 lea edi,[ebp-5Ch]
004011EC B9 17 00 00 00 mov ecx,17h
004011F1 B8 CC CC CC CC mov eax,0CCCCCCCCh
004011F6 F3 AB rep stos dword ptr [edi]
16: char string1[]= {"Hello there"};
004011F8 A1 3C F0 42 00 mov eax,[string "Hello there" (0042f03c)]
004011FD 89 45 F4 mov dword ptr [ebp-0Ch],eax
00401200 8B 0D 40 F0 42 00 mov ecx,dword ptr [string "Hello there"+4 (0042f040)]
00401206 89 4D F8 mov dword ptr [ebp-8],ecx
00401209 8B 15 44 F0 42 00 mov edx,dword ptr [string "Hello there"+8 (0042f044)]
0040120F 89 55 FC mov dword ptr [ebp-4],edx
17: char string2[]= {"Hi there"};
00401212 A1 30 F0 42 00 mov eax,[string "Hi there" (0042f030)]
00401217 89 45 E8 mov dword ptr [ebp-18h],eax
0040121A 8B 0D 34 F0 42 00 mov ecx,dword ptr [string "Hi there"+4 (0042f034)]
00401220 89 4D EC mov dword ptr [ebp-14h],ecx
00401223 8A 15 38 F0 42 00 mov dl,byte ptr [string "Hi there"+8 (0042f038)]
00401229 88 55 F0 mov byte ptr [ebp-10h],dl
18:
19: bool result = cmpstringz0rs( string1, string2, sizeof(string1), sizeof(string2) );
0040122C 6A 09 push 9
0040122E 6A 0C push 0Ch
00401230 8D 45 E8 lea eax,[ebp-18h]
00401233 50 push eax
00401234 8D 4D F4 lea ecx,[ebp-0Ch]
00401237 51 push ecx
00401238 E8 18 FE FF FF call @ILT+80(cmpstringz0rs) (00401055)
0040123D 83 C4 10 add esp,10h
00401240 88 45 E4 mov byte ptr [ebp-1Ch],al
20:
21: if (result) cout << "equal";
00401243 8B 55 E4 mov edx,dword ptr [ebp-1Ch]
00401246 81 E2 FF 00 00 00 and edx,0FFh
0040124C 85 D2 test edx,edx
0040124E 74 14 je main+84h (00401264)
00401250 68 28 F0 42 00 push offset string "equal" (0042f028)
00401255 68 A0 3E 43 00 push offset std::cout (00433ea0)
0040125A E8 37 FE FF FF call @ILT+145(std::operator<<) (00401096)
0040125F 83 C4 08 add esp,8
22: else cout << "not equal";
00401262 EB 12 jmp main+96h (00401276)
00401264 68 1C F0 42 00 push offset string "not equal" (0042f01c)
00401269 68 A0 3E 43 00 push offset std::cout (00433ea0)
0040126E E8 23 FE FF FF call @ILT+145(std::operator<<) (00401096)
00401273 83 C4 08 add esp,8
23: return;
24: }
00401276 5F pop edi
00401277 5E pop esi
00401278 5B pop ebx
00401279 83 C4 5C add esp,5Ch
0040127C 3B EC cmp ebp,esp
0040127E E8 1D 7C 00 00 call __chkesp (00408ea0)
00401283 8B E5 mov esp,ebp
00401285 5D pop ebp
00401286 C3 ret
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