/*++ /* NAME /* allspace 3 /* SUMMARY /* predicate if string is all space /* SYNOPSIS /* #include <stringops.h> /* /* int allspace(buffer) /* const char *buffer; /* DESCRIPTION /* allspace() determines if its argument is an all-space string. /* /* Arguments: /* .IP buffer /* The null-terminated input string. /* LICENSE /* .ad /* .fi /* The Secure Mailer license must be distributed with this software. /* AUTHOR(S) /* Wietse Venema /* IBM T.J. Watson Research /* P.O. Box 704 /* Yorktown Heights, NY 10598, USA /*--*/ /* System library. */ #include <sys_defs.h> #include <ctype.h> /* Utility library. */ #include "stringops.h" /* allspace - return true if string is all space */ int allspace(const char *string) { const char *cp; int ch; if (*string == 0) return (0); for (cp = string; (ch = *(unsigned char *) cp) != 0; cp++) if (!ISASCII(ch) || !ISSPACE(ch)) return (0); return (1); }