uint FUN_00403a20(uint param_1,int param_2,uint param_3)

{

  uint *puVar1;

  int iVar2;

  uint uVar3;

  uint *puVar4;

  uint uVar5;

  uint local_a8 [32];

  uVar5 = 1 << (param_1 & 0x1f);

  puVar4 = local_a8 + (param_1 >> 5);

  uVar3 = 0;

  puVar1 = local_a8;

  do {

    do {

      do {

        *puVar1 = 0;

        puVar1 = puVar1 + 1;

      } while (puVar1 != (uint *)&stack0xffffffd8);

      *puVar4 = *puVar4 | uVar5;

      iVar2 = FUN_0047f0b0(param_1 + 1,local_a8,0,0,0);

      puVar1 = local_a8;

    } while ((iVar2 < 0) || ((uVar5 & *puVar4) == 0));

    iVar2 = FUN_0047f050(param_1,param_2 + uVar3,param_3 - uVar3);

    if (iVar2 < 1) {

      return uVar3;

    }

    uVar3 = uVar3 + iVar2;

    if (*(char *)(param_2 + uVar3 + -1) == '\0') {

      return uVar3;

    }

  } while (param_3 < uVar3);

  return uVar3;

}