Re: [U-Boot-Users] [RFC/PATCH] Add expr command

On Wed, Feb 13, 2008 at 03:20:56PM +0100, Andreas Schweigstill wrote:

• /* Validate arguments */
• if ((argc != 5) || (strlen(argv[3]) != 1)) {

• printf("Usage:\n%s\n", cmdtp->usage);
  

• return 1;
  

• }

May we rely on the compiler optimizing the above expression so strlen() != 1 will only be evaluated if argc == 5 ?

Short-circuit evaluation isn't optimization, it's the semantics of the C language.

-Scott