Question

I have this code that works fine for regular signed integers that I am trying to write an equivalent version that will work with size_t (as in that as of now start and count are ints and i need them to be size_t) :

int count,start;
for (start = (count-2)/2; start >=0; start--)
{
     someFunction( x, start, count); // x is to illustrate function has other parameters
}

I feel like this code is straight forward enough for a really simple solution but I am drawing a blank.

Answer 1

You could rewrite it like this:

start = count/2;
while (start > 0){
    start--;
    someFunction( x, start, count);
}

Otherwise, the only other option I can think of is to do some non-standard compliant casting between signed and unsigned… or to do something with ~(size_t)0…

Here are some non-standard compliant alternatives:

for (start = (count-2)/2; (ssize_t)start >= 0; start--)
{
     someFunction( x, start, count);
}

for (start = (count-2)/2; start != ~(size_t)0; start--)
{
     someFunction( x, start, count);
}