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-rw-r--r--src/util/allascii.c65
1 files changed, 65 insertions, 0 deletions
diff --git a/src/util/allascii.c b/src/util/allascii.c
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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);
+}