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/*++
/* NAME
/* allascii 3
/* SUMMARY
/* predicate if string is all ASCII
/* SYNOPSIS
/* #include <stringops.h>
/*
/* int allascii(buffer)
/* const char *buffer;
/*
/* int allascii_len(buffer, len)
/* const char *buffer;
/* ssize_t len;
/* DESCRIPTION
/* allascii() determines if its argument is an all-ASCII string.
/*
/* Arguments:
/* .IP buffer
/* The null-terminated input string.
/* .IP len
/* The string length, -1 to determine the length dynamically.
/* 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
/*
/* Wietse Venema
/* Google, Inc.
/* 111 8th Avenue
/* New York, NY 10011, USA
/*--*/
/* System library. */
#include <sys_defs.h>
#include <ctype.h>
#include <string.h>
/* Utility library. */
#include "stringops.h"
/* allascii_len - return true if string is all ASCII */
int allascii_len(const char *string, ssize_t len)
{
const char *cp;
int ch;
if (len < 0)
len = strlen(string);
if (len == 0)
return (0);
for (cp = string; cp < string + len
&& (ch = *(unsigned char *) cp) != 0; cp++)
if (!ISASCII(ch))
return (0);
return (1);
}
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