gcov and switch statements
- by Matt
I'm running gcov over some C code with a switch statement. I've written test cases to cover every possible path through that switch statement, but it still reports a branch in the switch statement as not taken and less than 100% on the "Taken at least once" stat.
Here's some sample code to demonstrate:
#include "stdio.h"
void foo(int i)
{
switch(i)
{
case 1:printf("a\n");break;
case 2:printf("b\n");break;
case 3:printf("c\n");break;
default: printf("other\n");
}
}
int main()
{
int i;
for(i=0;i<4;++i)
foo(i);
return 0;
}
I built with "gcc temp.c -fprofile-arcs -ftest-coverage", ran "a", then did "gcov -b -c temp.c". The output indicates eight branches on the switch and one (branch 6) not taken.
What are all those branches and how do I get 100% coverage?
