/* isalnum.c - character classification *//* Copyright 1992-1993 Wind River Systems, Inc. *//*modification history--------------------01e,03mar93,jdi  more documentation cleanup for 5.1.01d,07feb93,jdi  documentation cleanup for 5.1.01c,20sep92,smb  documentation additions.01b,04jul92,smb  added vxWorks.h and extra documentation01a,24mar92,smb  written*//*DESCRIPTIONINCLUDE FILE: ctype.hSEE ALSO: American National Standard X3.159-1989NOMANUAL*/#include "vxWorks.h"#include "ctype.h"#undef isalnum/********************************************************************************* isalnum - test whether a character is alphanumeric (ANSI)** This routine tests whether <c> is a character for which isalpha() or* isdigit() returns true.** INCLUDE FILES: ctype.h** RETURNS: Non-zero if and only if <c> is alphanumeric.*/int isalnum     (    int c       /* character to test */    )    {    return __isalnum(c);    }