text: /* TEMPLATE GENERATED TESTCASE FILE
  Filename: CWE191_Integer_Underflow__int_min_postdec_16.c
  Label Definition File: CWE191_Integer_Underflow__int.label.xml
  Template File: sources-sinks-16.tmpl.c
  */
  /*
   * @description
   * CWE: 191 Integer Underflow
   * BadSource: min Set data to the minimum value for int
   * GoodSource: Set data to a small, non-zero number (negative two)
   * Sinks: decrement
   *    GoodSink: Ensure there will not be an underflow before decrementing data
   *    BadSink : Decrement data, which can cause an Underflow
   * Flow Variant: 16 Control flow: while(1)
   *
   * */
  
  #include "std_testcase.h"
  
  #ifndef OMITBAD
  
  void CWE191_Integer_Underflow__int_min_postdec_16_bad()
  {
      int data;
      /* Initialize data */
      data = 0;
      while(1)
      {
          /* POTENTIAL FLAW: Use the minimum value for this type */
          data = INT_MIN;
          break;
      }
      while(1)
      {
          {
              /* POTENTIAL FLAW: Decrementing data could cause an underflow */
              data--;
              int result = data;
              printIntLine(result);
          }
          break;
      }
  }
  
  #endif /* OMITBAD */
  
  #ifndef OMITGOOD
  
  /* goodB2G() - use badsource and goodsink by changing the sinks in the second while statement */
  static void goodB2G()
  {
      int data;
      /* Initialize data */
      data = 0;
      while(1)
      {
          /* POTENTIAL FLAW: Use the minimum value for this type */
          data = INT_MIN;
          break;
      }
      while(1)
      {
          /* FIX: Add a check to prevent an underflow from occurring */
          if (data > INT_MIN)
          {
              data--;
              int result = data;
              printIntLine(result);
          }
          else
          {
              printLine("data value is too large to perform arithmetic safely.");
          }
          break;
      }
  }
  
  /* goodG2B() - use goodsource and badsink by changing the sources in the first while statement */
  static void goodG2B()
  {
      int data;
      /* Initialize data */
      data = 0;
      while(1)
      {
          /* FIX: Use a small, non-zero value that will not cause an integer underflow in the sinks */
          data = -2;
          break;
      }
      while(1)
      {
          {
              /* POTENTIAL FLAW: Decrementing data could cause an underflow */
              data--;
              int result = data;
              printIntLine(result);
          }
          break;
      }
  }
  
  void CWE191_Integer_Underflow__int_min_postdec_16_good()
  {
      goodB2G();
      goodG2B();
  }
  
  #endif /* OMITGOOD */
  
  /* Below is the main(). It is only used when building this testcase on
     its own for testing or for building a binary to use in testing binary
     analysis tools. It is not used when compiling all the testcases as one
     application, which is how source code analysis tools are tested. */
  
  #ifdef INCLUDEMAIN
  
  int main(int argc, char * argv[])
  {
      /* seed randomness */
      srand( (unsigned)time(NULL) );
  #ifndef OMITGOOD
      printLine("Calling good()...");
      CWE191_Integer_Underflow__int_min_postdec_16_good();
      printLine("Finished good()");
  #endif /* OMITGOOD */
  #ifndef OMITBAD
      printLine("Calling bad()...");
      CWE191_Integer_Underflow__int_min_postdec_16_bad();
      printLine("Finished bad()");
  #endif /* OMITBAD */
      return 0;
  }
  
  #endif
  