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-rw-r--r--src/util/lowercase.c43
1 files changed, 43 insertions, 0 deletions
diff --git a/src/util/lowercase.c b/src/util/lowercase.c
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+++ b/src/util/lowercase.c
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+/*++
+/* 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);
+}