void FUN_00405430(undefined4 *param_1,uint param_2,int param_3,uint param_4)

{

  ushort uVar1;

  undefined1 uVar2;

  int iVar3;

  ushort *puVar4;

  char *pcVar5;

  undefined **ppuVar6;

  uint uVar7;

  int iVar8;

  uint uVar9;

  uint uVar10;

  param_4 = param_4 & 0xffff;

  puVar4 = *(ushort **)(param_3 + 4);

  param_1[1] = puVar4;

  uVar9 = *(uint *)(param_3 + 8);

  iVar8 = *(int *)(param_3 + 0xc);

  uVar10 = uVar9 - iVar8;

  ppuVar6 = (undefined **)(param_2 & 0xffff);

  if (uVar10 < param_4 + 4) {

    param_1 = (undefined4 *)FUN_0047082c(4);

    ppuVar6 = &PTR_PTR_FUN_004af1e0;

    pcVar5 = (char *)0x6007;

  }

  else {

    uVar1 = *puVar4;

    uVar2 = (undefined1)((uint)ppuVar6 >> 8);

    if (ppuVar6 == (undefined **)((uVar1 & 0xff) << 8 | (uint)(uVar1 >> 8))) goto LAB_004054f8;

    param_1 = (undefined4 *)FUN_0047082c(4);

    pcVar5 = (char *)0x6008;

    ppuVar6 = &PTR_PTR_FUN_004af1e0;

  }

  while( true ) {

    while( true ) {

      *param_1 = pcVar5;

      param_3 = 0;

      uVar2 = FUN_00472734();

LAB_004054f8:

      *(char *)param_1 = (char)ppuVar6;

      *(undefined1 *)((int)param_1 + 1) = uVar2;

      iVar3 = param_1[1];

      param_1[1] = iVar3 + 2;

      uVar1 = *(ushort *)(iVar3 + 2);

      uVar7 = (uVar1 & 0xff) << 8 | (uint)(uVar1 >> 8);

      *(char *)((int)param_1 + 3) = (char)uVar1;

      *(char *)((int)param_1 + 2) = (char)(uVar1 >> 8);

      if (param_4 <= uVar7) break;

      param_1 = (undefined4 *)FUN_0047082c(4);

      ppuVar6 = &PTR_PTR_FUN_004af1e0;

      pcVar5 = (char *)0x6004;

    }

    if (uVar7 + 4 <= uVar10) break;

    param_1 = (undefined4 *)FUN_0047082c(4);

    ppuVar6 = &PTR_PTR_FUN_004af2b0;

    pcVar5 = "buffer overflow error";

  }

  param_1[1] = param_1[1] + 2;

  iVar3 = *(ushort *)((int)param_1 + 2) + 4;

  uVar10 = iVar3 + iVar8;

  if (uVar10 <= uVar9) {

    *(uint *)(param_3 + 0xc) = uVar10;

    *(int *)(param_3 + 4) = *(int *)(param_3 + 4) + iVar3;

  }

  return;

}