1/*++
2/* NAME
3/*	allspace 3
4/* SUMMARY
5/*	predicate if string is all space
6/* SYNOPSIS
7/*	#include <stringops.h>
8/*
9/*	int	allspace(buffer)
10/*	const char *buffer;
11/* DESCRIPTION
12/*	allspace() determines if its argument is an all-space string.
13/*
14/*	Arguments:
15/* .IP buffer
16/*	The null-terminated input string.
17/* LICENSE
18/* .ad
19/* .fi
20/*	The Secure Mailer license must be distributed with this software.
21/* AUTHOR(S)
22/*	Wietse Venema
23/*	IBM T.J. Watson Research
24/*	P.O. Box 704
25/*	Yorktown Heights, NY 10598, USA
26/*--*/
27
28/* System library. */
29
30#include <sys_defs.h>
31#include <ctype.h>
32
33/* Utility library. */
34
35#include "stringops.h"
36
37/* allspace - return true if string is all space */
38
39int     allspace(const char *string)
40{
41    const char *cp;
42    int     ch;
43
44    if (*string == 0)
45	return (0);
46    for (cp = string; (ch = *(unsigned char *) cp) != 0; cp++)
47	if (!ISASCII(ch) || !ISSPACE(ch))
48	    return (0);
49    return (1);
50}
51