c - Can anyone tell me what this section of pseudocode is doing? -


can tell me section of pseudocode doing?
produced use ida pro

thanks in advance!

int __cdecl sub_401000(int a1, int a2) {   int result; // eax@4                                                           int v3; // [sp+0h] [bp-ch]@4                                                   char v4; // [sp+7h] [bp-5h]@4                                                  int i; // [sp+8h] [bp-4h]@1                                                    signed int v6; // [sp+8h] [bp-4h]@4                                             ( = 0; *(_byte *)(i + a1); ++i )     ;   result = - 1;   v6 = - 1;   v3 = 0;   v4 = -1;   while ( v4 )   {     v4 = *(_byte *)(v6 + a1);     result = a2;     *(_word *)(a2 + 2 * v3) = ((unsigned __int8)byte_40a300[v6 % 4] ^ *(_byte *)(v6 +     a1)) & 0x7f;     --v6;     ++v3;   }   return result; }

the first for loop finds length of string a1. following while loop transforms bytes of a1 xoring them 4 byte constant key, , widening utf16 (presumably). result written reversed a2.


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