text: /* TEMPLATE GENERATED TESTCASE FILE
  Filename: CWE191_Integer_Underflow__int64_t_fscanf_predec_13.c
  Label Definition File: CWE191_Integer_Underflow.label.xml
  Template File: sources-sinks-13.tmpl.c
  */
  /*
   * @description
   * CWE: 191 Integer Underflow
   * BadSource: fscanf Read data from the console using fscanf()
   * 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: 13 Control flow: if(GLOBAL_CONST_FIVE==5) and if(GLOBAL_CONST_FIVE!=5)
   *
   * */
  
  #include <inttypes.h>
  #include "std_testcase.h"
  
  #ifndef OMITBAD
  
  void CWE191_Integer_Underflow__int64_t_fscanf_predec_13_bad()
  {
      int64_t data;
      data = 0LL;
      if(GLOBAL_CONST_FIVE==5)
      {
          /* POTENTIAL FLAW: Use a value input from the console */
          fscanf (stdin, "%" SCNd64, &data);
      }
      if(GLOBAL_CONST_FIVE==5)
      {
          {
              /* POTENTIAL FLAW: Decrementing data could cause an underflow */
              --data;
              int64_t result = data;
              printLongLongLine(result);
          }
      }
  }
  
  #endif /* OMITBAD */
  
  #ifndef OMITGOOD
  
  /* goodB2G1() - use badsource and goodsink by changing the second GLOBAL_CONST_FIVE==5 to GLOBAL_CONST_FIVE!=5 */
  static void goodB2G1()
  {
      int64_t data;
      data = 0LL;
      if(GLOBAL_CONST_FIVE==5)
      {
          /* POTENTIAL FLAW: Use a value input from the console */
          fscanf (stdin, "%" SCNd64, &data);
      }
      if(GLOBAL_CONST_FIVE!=5)
      {
          /* INCIDENTAL: CWE 561 Dead Code, the code below will never run */
          printLine("Benign, fixed string");
      }
      else
      {
          /* FIX: Add a check to prevent an underflow from occurring */
          if (data > LLONG_MIN)
          {
              --data;
              int64_t result = data;
              printLongLongLine(result);
          }
          else
          {
              printLine("data value is too large to perform arithmetic safely.");
          }
      }
  }
  
  /* goodB2G2() - use badsource and goodsink by reversing the blocks in the second if */
  static void goodB2G2()
  {
      int64_t data;
      data = 0LL;
      if(GLOBAL_CONST_FIVE==5)
      {
          /* POTENTIAL FLAW: Use a value input from the console */
          fscanf (stdin, "%" SCNd64, &data);
      }
      if(GLOBAL_CONST_FIVE==5)
      {
          /* FIX: Add a check to prevent an underflow from occurring */
          if (data > LLONG_MIN)
          {
              --data;
              int64_t result = data;
              printLongLongLine(result);
          }
          else
          {
              printLine("data value is too large to perform arithmetic safely.");
          }
      }
  }
  
  /* goodG2B1() - use goodsource and badsink by changing the first GLOBAL_CONST_FIVE==5 to GLOBAL_CONST_FIVE!=5 */
  static void goodG2B1()
  {
      int64_t data;
      data = 0LL;
      if(GLOBAL_CONST_FIVE!=5)
      {
          /* INCIDENTAL: CWE 561 Dead Code, the code below will never run */
          printLine("Benign, fixed string");
      }
      else
      {
          /* FIX: Use a small, non-zero value that will not cause an underflow in the sinks */
          data = -2;
      }
      if(GLOBAL_CONST_FIVE==5)
      {
          {
              /* POTENTIAL FLAW: Decrementing data could cause an underflow */
              --data;
              int64_t result = data;
              printLongLongLine(result);
          }
      }
  }
  
  /* goodG2B2() - use goodsource and badsink by reversing the blocks in the first if */
  static void goodG2B2()
  {
      int64_t data;
      data = 0LL;
      if(GLOBAL_CONST_FIVE==5)
      {
          /* FIX: Use a small, non-zero value that will not cause an underflow in the sinks */
          data = -2;
      }
      if(GLOBAL_CONST_FIVE==5)
      {
          {
              /* POTENTIAL FLAW: Decrementing data could cause an underflow */
              --data;
              int64_t result = data;
              printLongLongLine(result);
          }
      }
  }
  
  void CWE191_Integer_Underflow__int64_t_fscanf_predec_13_good()
  {
      goodB2G1();
      goodB2G2();
      goodG2B1();
      goodG2B2();
  }
  
  #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__int64_t_fscanf_predec_13_good();
      printLine("Finished good()");
  #endif /* OMITGOOD */
  #ifndef OMITBAD
      printLine("Calling bad()...");
      CWE191_Integer_Underflow__int64_t_fscanf_predec_13_bad();
      printLine("Finished bad()");
  #endif /* OMITBAD */
      return 0;
  }
  
  #endif
  