1 files changed, 43 insertions, 0 deletions
diff --git a/src/util/lowercase.c b/src/util/lowercase.c
new file mode 100644
index 0000000..f7388b4
--- /dev/null
+++ b/src/util/lowercase.c
@@ -0,0 +1,43 @@
+/*++
+/* NAME
+/*	lowercase 3
+/* SUMMARY
+/*	map uppercase characters to lowercase
+/* SYNOPSIS
+/*	#include <stringops.h>
+/*
+/*	char	*lowercase(buf)
+/*	char	*buf;
+/* DESCRIPTION
+/*	lowercase() replaces uppercase characters in its null-terminated
+/*	input by their lowercase equivalent.
+/* 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"
+
+char   *lowercase(char *string)
+{
+    char   *cp;
+    int     ch;
+
+    for (cp = string; (ch = *cp) != 0; cp++)
+	if (ISUPPER(ch))
+	    *cp = TOLOWER(ch);
+    return (string);
+}