strcmp and/or strncmp. issues

[mherald81]

Ok, I have this program pretty much done but I'm just trying to tweak it up a bit.

I'm writting a commmand line interpreter and trying to get it recognize as few characters as possible for the commands. For example I have:

	    if(strcmp(arguments[0],"assemble") == 0)
	    {
		if(argcount!=2)
		{
		    printf("Need exactly one argument! See help for more info.\n");
		}
		else
		{
		    printf("Assemble SIC program into file %s.\n",arguments[1]);
		}
	    }

I want it to recognize "a" or "assemble" or even "assem" if possible as well as know that "at" is not the assemble command. I tried using strncmp, but can't get it work how I want it to. I appreciate any help or suggestions. If you need to see more of what I have, just let me know.

[helios]

argv[0] is the name of the binary.
argv[1] is the first parameter passed. And so on.
argc is never lower than 1.

[Duthomhas]

You'll also need to be careful that each argument string is unique.

The function you want is strstr().

bool prefix_match( const char* arg, const char* pattern )
  {
  return strstr( pattern, arg ) == pattern;
  }

Now:

prefix_match( "foo", "fooey"  ) --> true
prefix_match( "ey",  "fooey"  ) --> false
prefix_match( "zaz", "fooey"  ) --> false
prefix_match( "foo", "foobar" ) --> also true

Hope this helps.

[mherald81]

Thanks Duoas, I will give this a try!

[mherald81]

Duoas,

I am still having problems with it working. Can I email you my full so you can take a look at it? I dont' want to post the whole thing on here.

[Duthomhas]

Er, sure. No promises though. If it is huge just put a link to it instead of filling-up my inbox.