1 files changed, 50 insertions, 0 deletions
diff --git a/src/util/allprint.c b/src/util/allprint.c
new file mode 100644
index 0000000..6e9c519
--- /dev/null
+++ b/src/util/allprint.c
@@ -0,0 +1,50 @@
+/*++
+/* NAME
+/*	allprint 3
+/* SUMMARY
+/*	predicate if string is all printable
+/* SYNOPSIS
+/*	#include <stringops.h>
+/*
+/*	int	allprint(buffer)
+/*	const char *buffer;
+/* DESCRIPTION
+/*	allprint() determines if its argument is an all-printable 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"
+
+/* allprint - return true if string is all printable */
+
+int     allprint(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) || !ISPRINT(ch))
+	    return (0);
+    return (1);
+}