int base64_decodestring(char *param_1,void *param_2,int param_3)

{

  char cVar1;

  char *pcVar2;

  char *pcVar3;

  int iVar4;

  size_t __n;

  int iVar5;

  int iVar6;

  byte local_70;

  byte local_6f;

  byte local_6e;

  uint local_60;

  uint local_5c;

  uint local_58;

  uint local_54;

  void *local_48;

  void *local_44;

  uint local_40;

  int local_3c;

  char *local_38;

  byte *local_34;

  int local_30;

  local_48 = (void *)((int)param_2 + param_3);

  local_38 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";

  iVar6 = 0;

  iVar5 = 0;

  local_3c = 1;

  local_34 = &local_70;

  local_30 = 4;

  local_40 = 0x40;

  cVar1 = *param_1;

  pcVar2 = param_1 + 1;

  local_44 = param_2;

  while (iVar4 = (int)cVar1, iVar4 != 0) {

    if ((((iVar4 != 0x20) && (iVar4 != 9)) && (iVar4 != 10)) && (iVar4 != 0xd)) {

      if (iVar6 == local_3c) {

        return -1;

      }

      pcVar3 = strchr(local_38,iVar4);

      if (pcVar3 == (char *)0x0) goto LAB_00417f68;

      iVar4 = iVar5 + 2;

      iVar5 = iVar5 + 1;

      *(int *)(local_34 + iVar4 * 4 + 8) = (int)pcVar3 - (int)local_38   //possible issue identified - semgrep

      if (iVar5 == local_30) {

        if ((local_60 == local_40) || (local_5c == local_40)) goto LAB_00417f68;

        if (local_58 == local_40) {

          if (local_54 != local_40) {

            return -1;

          }

          if ((local_5c & 0xf) != 0) {

            return -1;

          }

LAB_004180f0:

          if (local_58 != local_40) goto LAB_00418048;

          local_58 = 0;

          if (local_54 == local_40) {

            __n = 1   //possible issue identified - semgrep

            goto LAB_00418134;

          }

          iVar6 = 1;

          __n = 1   //possible issue identified - semgrep

        }

        else {

          if (local_54 == local_40) {

            if ((local_58 & 3) != 0) {

              return -1;

            }

            goto LAB_004180f0;

          }

LAB_00418048:

          __n = 2   //possible issue identified - semgrep

          if (local_54 == local_40) {

LAB_00418134:

            local_54 = 0;

            iVar6 = 1;

          }

          else {

            __n = 3   //possible issue identified - semgrep

          }

        }

        if (local_48 <= (void *)((int)param_2 + __n)) {

          return -1;

        }

        local_6f = (byte)((int)local_58 >> 2) | (byte)(local_5c << 4);

        local_70 = (byte)((int)local_5c >> 4) | (byte)(local_60 << 2);

        local_6e = (byte)(local_58 << 6) | (byte)local_54;

        memcpy(param_2,local_34,__n)   //possible issue identified - semgrep

        iVar5 = 0;

        param_2 = (void *)((int)param_2 + __n);

      }

    }

    cVar1 = *pcVar2;

    pcVar2 = pcVar2 + 1;

  }

  iVar6 = (int)param_2 - (int)local_44;

  if (iVar5 != 0) {

LAB_00417f68:

    iVar6 = -1;

  }

  return iVar6;

}