2.9BSD - /usr/src/lib/c/gen/index.c

   1: /*	@(#)index.c	2.1	SCCS id keyword	*/
   2: /*
   3:  * Return the ptr in sp at which the character c appears;
   4:  * NULL if not found
   5:  */
   6: 
   7: #define NULL    0
   8: 
   9: char *
  10: index(sp, c)
  11: register char *sp, c;
  12: {
  13:     do {
  14:         if (*sp == c)
  15:             return(sp);
  16:     } while (*sp++);
  17:     return(NULL);
  18: }

Defined functions

Defined macros