CExpressionCalculator::ParseUnary

/* CExpressionCalculator::ParseUnary(char const*&) */

undefined4 __thiscall CExpressionCalculator::ParseUnary(CExpressionCalculator *this,char **param_1)

{
  char *pcVar1;
  undefined4 uVar2;
  char cVar3;
  undefined4 uVar4;
  float *pfVar5;
  int local_34;
  float local_30;
  float local_2c;
  char *local_28;
  char *local_24;
  char *local_20;
  
  local_28 = "+";
  local_24 = "-";
  local_20 = "!";
  local_34 = 3;
  pcVar1 = *param_1;
  uVar2 = *(undefined4 *)(this + 0x44);
  cVar3 = ParseStringList(param_1,&local_28,&local_34);
  if ((cVar3 == '\0') || (uVar4 = ParseUnary(this,param_1), (char)uVar4 == '\0')) {
    *(undefined4 *)(this + 0x44) = uVar2;
    *param_1 = pcVar1;
    uVar4 = ParsePrimary(this,param_1);
    if ((char)uVar4 == '\0') {
      *(undefined4 *)(this + 0x44) = uVar2;
      *param_1 = pcVar1;
    }
    return uVar4;
  }
  local_30 = *(float *)(*(int *)(this + 0x38) + (*(int *)(this + 0x44) + -1) * 4);
  *(int *)(this + 0x44) = *(int *)(this + 0x44) + -1;
  if (local_34 == 1) {
    local_2c = -local_30;
  }
  else {
    if (local_34 != 2) {
      if (local_34 != 0) {
        return uVar4;
      }
      pfVar5 = &local_30;
      goto LAB_0026f32f;
    }
    local_2c = 1.0;
    if (local_30 != 0.0) {
      local_2c = 0.0;
    }
  }
  pfVar5 = &local_2c;
LAB_0026f32f:
  CUtlStack<float,CUtlMemory<float,int>>::Push
            ((CUtlStack<float,CUtlMemory<float,int>> *)(this + 0x38),pfVar5);
  return uVar4;
}